Working Principle of License Plate Recognition Parking Lot System

License plate recognition parking lot system has been welcomed by many people in life, but for license plate recognition parking lot system, what aspects should we judge its quality? As a leading enterprise in intelligent parking lot system solutions and products in China, Shenzhen tigerwong will lead you today to learn about some technical performance indicators of license plate recognition parking lot system. Firstly, the license plate recognition parking lot system, like other parking lot systems, should consider the quality of products, the stability of movement performance and the reliability of system operation; Secondly, the license plate recognition parking lot system is a unique feature of its own, which is the recognition rate, recognition speed and background management system of the license plate recognition system. The reason why the license plate recognition parking lot system is so popular in recent two years is that with the development of technology, the recognition rate of license plate recognition is getting higher and higher. In the process of driving into the parking lot, the license plate recognition system can recognize the license plate in a very short time. At the same time, the gate is raised, and the whole parking process can be completed in just a few seconds. How can we know the recognition rate of license plate recognition parking lot system? To this end, we conducted a test to make the system installed in a real environment, work 24 hours a day, and ensure that the natural traffic flow of a day is not less than 1000, so that we can calculate the recognition rate (natural traffic flow = correctly recognized vehicles of the whole brand / the total number of vehicles actually passed). Unlike other parking lot systems, the license plate recognition parking lot system is prone to the situation that the gate does not lift the rod or the gate rod is easy to be damaged due to the slow lifting speed if the recognition is wrong, unrecognized or slow.

With the increase of vehicles, the difficulty of parking has gradually become a major problem in people's daily life. The traditional parking lot can no longer meet people's needs. With the development of technology, the management mode of parking lot system is also diverse. All kinds of advanced technologies have joined the parking lot family, and license plate recognition technology is one of them. However, These parking lot equipment sometimes have some problems in use, so we have to talk about daily maintenance.In the past two years, with the gradual maturity of the technology, the license plate recognition system has overcome the interference of the external environment and is more and more widely applicable. This is also one of the reasons why it is becoming more and more popular. In the parking lot in the big data era, how to obtain a large amount of license plate information, license plate recognition is the key. First, License plate recognition system can extract and recognize complex vehicle license plates from different backgrounds. Through license plate number extraction, image preprocessing, feature extraction, license plate character recognition and other technologies, the vehicle license plate can be effectively recognized.For the parking lot after the license plate recognition parking lot system is installed. When the vehicle enters and leaves the parking lot, the owner does not need to pick up the card. The system takes photos directly and stores the photos taken and the entry time of the vehicle in the database at the same time. When the vehicle appeared, license plate recognition system took photos of the vehicle again, compared with the information of the database when entering the scene, automatically calculated the parking time and the parking cost that should be paid, all data could be saved in the database, and the Internet shared the data, giving full play to the biggest role of the Internet plus car park. However, any product has its own service cycle and service life, so in order to make the service life of the equipment longer, later maintenance is very important for users.Of course, the car parking management system used in the parking lot is no exception. Regular maintenance can increase its service life and make it live a long life. We know that in order to ensure the quality of car parking management system, each manufacturer will choose stainless steel plates of different materials and different manufacturing processes to produce car parking management system. After manufacturing, we will also use different spraying processes for surface treatment in order to ensure the appearance of products. Similarly, before leaving the factory, in order to ensure the stable operation of our equipment, as a manufacturer, we need to carry out repeated and continuous tests on the equipment.We can leave the factory only after ensuring the normal operation of the equipment. Whether it is the selection of materials before production or the continuous testing before leaving the factory, if we ignore the maintenance of the product in the later use process, it will be a waste of previous efforts, We still cannot guarantee the service life of the car parking management system. Attention should also be paid to the installation of the equipment. The height of the installation position directly affects whether the license plate can be recognized. With the increase of service time, the installation screws of the camera will be loose.It is particularly important to check the tightness of the screws irregularly in the later stage. Unlike other equipment, the car parking management system works 24 hours a day without intermission, so we need to carry out maintenance every month. We need to check whether the connection of each line part is normal, whether the connectors of each part are loose, whether the rotating parts need to add lubricant, etc, Therefore, these will affect the service life of the equipment. The maintenance and repair in the later stage is very important for users, which may be ignored by many users. In addition, we should keep the lens clean.Generally, the license plate recognition system is installed in a large environment. The lens is easy to be stained due to the entry and exit of vehicles and rainy weather, resulting in the wrong license plate number and affecting the recognition rate. The development of intelligent transportation is inseparable from advanced technology and intelligent equipment. In the era of rapid development of modern transportation, the rapid growth of vehicles makes people encounter some difficulties in parking management. In order to meet people's living needs, we should not only pay attention to maintenance during use, but also make careful choices during purchase, The same is true for the parking lot license plate recognition system.Only through detailed maintenance can the equipment have a longer service life and longer service life. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.

With the increase of vehicles, the difficulty of parking has gradually become a major problem in people's daily life. The traditional parking lot can no longer meet people's needs. With the development of technology, the management mode of parking lot system is also diverse. All kinds of advanced technologies have joined the parking lot family, and license plate recognition technology is one of them. However, These parking lot equipment sometimes have some problems in use, so we have to talk about daily maintenance.In the past two years, with the gradual maturity of the technology, the license plate recognition system has overcome the interference of the external environment and is more and more widely applicable. This is also one of the reasons why it is becoming more and more popular. In the parking lot in the big data era, how to obtain a large amount of license plate information, license plate recognition is the key. First, License plate recognition system can extract and recognize complex vehicle license plates from different backgrounds. Through license plate number extraction, image preprocessing, feature extraction, license plate character recognition and other technologies, the vehicle license plate can be effectively recognized.For the parking lot after the license plate recognition parking lot system is installed. When the vehicle enters and leaves the parking lot, the owner does not need to pick up the card. The system takes photos directly and stores the photos taken and the entry time of the vehicle in the database at the same time. When the vehicle appeared, license plate recognition system took photos of the vehicle again, compared with the information of the database when entering the scene, automatically calculated the parking time and the parking cost that should be paid, all data could be saved in the database, and the Internet shared the data, giving full play to the biggest role of the Internet plus car park. However, any product has its own service cycle and service life, so in order to make the service life of the equipment longer, later maintenance is very important for users.Of course, the car parking management system used in the parking lot is no exception. Regular maintenance can increase its service life and make it live a long life. We know that in order to ensure the quality of car parking management system, each manufacturer will choose stainless steel plates of different materials and different manufacturing processes to produce car parking management system. After manufacturing, we will also use different spraying processes for surface treatment in order to ensure the appearance of products. Similarly, before leaving the factory, in order to ensure the stable operation of our equipment, as a manufacturer, we need to carry out repeated and continuous tests on the equipment.We can leave the factory only after ensuring the normal operation of the equipment. Whether it is the selection of materials before production or the continuous testing before leaving the factory, if we ignore the maintenance of the product in the later use process, it will be a waste of previous efforts, We still cannot guarantee the service life of the car parking management system. Attention should also be paid to the installation of the equipment. The height of the installation position directly affects whether the license plate can be recognized. With the increase of service time, the installation screws of the camera will be loose.It is particularly important to check the tightness of the screws irregularly in the later stage. Unlike other equipment, the car parking management system works 24 hours a day without intermission, so we need to carry out maintenance every month. We need to check whether the connection of each line part is normal, whether the connectors of each part are loose, whether the rotating parts need to add lubricant, etc, Therefore, these will affect the service life of the equipment. The maintenance and repair in the later stage is very important for users, which may be ignored by many users. In addition, we should keep the lens clean.Generally, the license plate recognition system is installed in a large environment. The lens is easy to be stained due to the entry and exit of vehicles and rainy weather, resulting in the wrong license plate number and affecting the recognition rate. The development of intelligent transportation is inseparable from advanced technology and intelligent equipment. In the era of rapid development of modern transportation, the rapid growth of vehicles makes people encounter some difficulties in parking management. In order to meet people's living needs, we should not only pay attention to maintenance during use, but also make careful choices during purchase, The same is true for the parking lot license plate recognition system.Only through detailed maintenance can the equipment have a longer service life and longer service life. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.

Whether a license plate recognition system is practical or not, the most important index is the recognition rate. International transportation technology has made a special discussion on the recognition rate index, which requires that the correct recognition rate of all signs is 85% 95% 24 hours a day. In order to test the recognition rate of a license plate recognition system, it is necessary to install the system in a practical application environment, operate for more than 24 hours all day, collect the license plate recognition of at least 1000 natural traffic flow, and store the vehicle license plate image and recognition results for retrieval and viewing. Then, we also need to get the actual passing vehicle image and the correct manual recognition results. After that, the following recognition rates can be counted: 1. Recognition rate of natural traffic flow = total number of correctly recognized full license plates / total number of actually passing vehicles 2. Percentage of recognizable license plates = total number of correctly read license plates manually / total number of actually passing vehicles 3 The correct recognition rate of the whole license plate that can be recognized = the total number of correctly recognized license plates of the whole license plate / the total number of manually read license plates. These three indicators determine the recognition rate of the license plate recognition system, such as reliability and false recognition rate, which are the intermediate results in the process of license plate recognition. The recognition speed determines whether a license plate recognition system can meet the requirements of real-time practical application. If a system with high recognition rate needs a few seconds or even minutes to recognize the results, the system will be of no practical significance because it can not meet the real-time requirements in practical applications. For example, in highway toll collection, one of the functions of license plate recognition application is to reduce traffic time, and speed is a powerful guarantee to reduce traffic time and avoid lane traffic jam in this kind of application. The recognition speed proposed by international transportation technology is less than 1 second, the faster the better.

Installation method and precautions of license plate recognition parking lot system; 4. During outdoor wiring, the line shall be protected by JDG galvanized iron pipe. Buried lines shall be laid through PVC pipes, and indoor wiring shall also be maintained and fixed through PVC pipes. 1 It is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, license plate recognition system refers to the technology that can detect vehicles on the monitored road and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals and license plate color) for disposal. License plate recognition is one of the important parts of modern intelligent transportation system. Analyze the vehicle image or video sequence captured by the camera to obtain the unique license plate number of each vehicle, so as to complete the recognition process. Measurement of traffic flow control indicators can realize parking lot charge management through some subsequent disposal means.Vehicle positioning, automobile anti-theft, automatic supervision of Expressway speeding, electronic police running red lights, highway toll stations and so on. It has practical significance for maintaining traffic safety and urban public security, preventing traffic congestion and realizing traffic automation management. 2 Automatic license plate recognition technology can realize the automatic registration and verification of vehicle "identity" without any change. The vehicle license plate number is the only "identity" identification of the vehicle. This technology has been applied to various occasions, such as highway toll collection, parking management, weighing system, traffic guidance, traffic law enforcement, highway inspection, vehicle scheduling, vehicle detection and so on. The installation process and precautions of license plate recognition system greatly affect the working performance of the whole license plate recognition system.A complete set of license plate recognition system includes license plate recognition all-in-one machine, parking lot toll display screen, intelligent gate, license plate recognition software, etc. Whether the devices of these equipment are standardized. A detailed survey shall be conducted on the project site, and the license plate recognition equipment shall be installed before the installation. To understand the customer's needs and formulate a perfect construction process, what factors should be emphasized in the field investigation and device process? 1. The device of the main equipment of license plate recognition, which will directly affect the effect of license plate recognition. 1 first, determine the device position of the integrated license plate recognition machine. It needs to be determined according to the site environment and conditions of each entrance and exit. Generally, one camera is installed in one lane.If the direction is not fixed when the vehicle enters the lane, the identification will be affected if the angle is too large. It is necessary to consider installing an auxiliary camera to ensure that the front of the vehicle can be identified no matter which side it is biased. Then it is necessary to determine the device position of the camera and coil: the best distance between the camera and the side of the incoming direction of the coil is 4-4.5m. The position of the coil shall ensure that the front direction of the vehicle is biased to the side of the camera as far as possible when the vehicle triggers the vehicle detector. 2 secondly, if capture identification is used. This allows the camera to take clear and complete pictures. If it is a single channel (the entrance and exit are in the same lane), a two-way vehicle detector needs to be used.There is no need to install ground induction coil and vehicle detector. If video recognition mode is used. The device is located behind the camera (30cm away from the camera pole, 3 and then determine the position of the barrier gate and anti smashing coil: the barrier gate is generally installed on the same side of the camera. Ensure that the barrier gate can be opened conveniently). The anti smashing coil is located in the middle right below the barrier bar. It is necessary to ensure that no part of the vehicle body is below the barrier bar when the front triggers the coil and when the rear leaves the coil.If the ground is brick or asphalt, 4 cameras and gates shall be installed on solid ground. It is necessary to consider pouring cement piers on broken pavement to increase stability. Before the installation of the above equipment, the wiring mode of the line shall be determined, and the threading pipe shall be reserved in advance according to the position of the equipment. In order to ensure that the recognition effect will not be affected by the vehicle speed, it is recommended to control the vehicle speed with a deceleration belt. 2 license plate recognition auxiliary equipment is used for charging. 1. Configure computer and server: the computer is generally placed in the entrance guard box or duty room. Optical fiber shall be laid from the sentry box to the server, and the server shall be placed in the customer's office or sentry box according to the customer's needs.If it's in the office. When investigating the site, the distance from the optical fiber to the nearest sentry box shall be estimated and allowance shall be made. If the client does not need to set up the server separately, the sentry box machine is used as the server, device database and FTP service. Gigabit 8-port or 5-port switches are generally selected. The switch should be placed in the guard box or distribution box nearby. 2. The switch shall be selected according to the number of devices to be networked.Ping an island is generally poured with concrete. The size of Ping'an island shall ensure that there is sufficient installation space for equipment such as sentry box or road gate. 3. Make Ping'an island and sentry box: set Ping'an Island according to needs and site conditions. And it will not affect the passing of vehicles. The threading pipe shall be embedded during the pouring of Ping'an island. After the completion of Ping An Island, you can brush paint to increase the eye-catching effect.For the convenience of charging, the sentry box is generally installed at the entrance of the parking lot. The size shall be determined according to the size of Ping'an island or the location of the device, but it must be ensured that there is enough space in the post box to accommodate computers and other equipment and the work of toll collectors. You can choose the device installed on Ping'an island or placed in the sentry box, duty room and 4 distribution box. If it is placed outdoors, it shall be rain proof and grounded. 3. The license plate recognition construction data integrated box, integrated machine and road gate shall be grounded. The air switch for bus power supply shall be selected according to the total power of all equipment.The power supply bus of 1 equipment shall use no less than rvv3 * 1.5 cables. Prevent overload tripping. Use category 6 network cable. When the transmission distance is greater than 100m, 2 when transmitting network data. The optical fiber needs to be laid. Generally, single-mode optical fiber is used. At least 2 cores shall be reserved for standby at each optical fiber access point on site.The total number of cores shall be determined according to the access points and the number of fusion cores at each access point. When transmitting 485 signals, shielded cables shall be used. When threading, strong and weak current lines must be separated. Each pair of transceivers uses 2-core optical fibers. The specific model and quantity can be determined according to the needs of customers or projects. 3. Gigabit single-mode dual fiber type can be selected for optical fiber transceiver.

With the rapid development of the Internet, the parking lot system is gradually updating from generation to generation. The traditional parking lot system architecture has long been thrown out of the sky. The current intelligent parking lot system can not meet people's living needs. With the application of license plate recognition technology to the parking lot system, the parking problem has been greatly improved, Compared with other card swiping or Bluetooth remote card reading parking lot systems, it has different charm, which is also the reason why it is very popular. Let's take a look at the charm of the popular license plate recognition parking lot system.Charm 1. It can be recognized from a large angle in the parking lot. Compared with the electronic police and other scenes, the recognition from a large angle is the biggest difference between the parking lot and other scenes, and it is also the biggest bottleneck of the license plate recognition technology in the parking lot environment. It is difficult for the license plate recognition system to capture the rectangular license plate in the conventional proportion under the large angle of the parking lot. The license plate imaging deformation caused by the large angle is one of the recognized technical difficulties of license plate recognition. The difficulties are as follows: 1. Difficult license plate location: due to the angle taken by the license plate recognition camera, the license plate image is often not rectangular, Therefore, affine deformation must be made first to correct it into a rectangular image.Therefore, it is not easy to extract license plates from such a complex external environment. 2. Image correction is more difficult: image correction uses directional high pass filtering (directional differentiation) to determine the direction of motion blur. Then the fuzzy scale is calculated by using the correlation principle. Charm 2. The recognition speed is quite fast. For the license plate recognition camera, the farther it is, the smaller the pixel is, and the closer it is, the larger the pixel is. Compared with other scenes, the lane of the parking lot is shorter, and the recognition of the current license plate recognition system is real-time.It is a typical contradiction to support the recognition of license plates with large pixel width while ensuring the recognition speed. Generally, if the license plate pixel width is too large, the recognition speed must be slow. If the recognition speed is fast, the license plate pixel width is required to be within a certain range. Charm III. The matching rate of vehicles at the entrance and exit of the parking lot is quite high. The architecture and internal recognition algorithm of the license plate recognition system are also constantly improved and improved.It is particularly noteworthy that some technologies extended and developed based on the hardware platform of license plate recognition, such as video speed measurement, vehicle type recognition, vehicle local feature recognition and comparison equivalence technology cooperate with license plate recognition to achieve the best vehicle matching rate at the entrance and exit of the parking lot, which is also a feature only available in the parking lot environment. Charm IV. parking charges are more strict. For the artificial cash charging method, on the one hand, it has high labor intensity and low efficiency. Another main disadvantage is that it causes great loopholes and cash loss in finance. Using the license plate recognition car parking management system, the system has a client and a management end.The management end can provide rich report statistics functions. The fees charged by the toll collector per shift need to match the fees displayed by the system, so as to eliminate cheating and protect the interests of the parking lot manager. Charm v. blacklist and white list functions can be added. A major feature of the community parking lot is that the vehicles in and out every day are basically fixed. Therefore, for this part of vehicles, the white list function of the license plate recognition system can be used.After importing the white list in the license plate recognition system, the vehicles in the white list function list can be automatically opened and released. You can also add a blacklist to the vehicles you don't want to put in. License plate recognition system was first applied in intelligent transportation, mainly used to detect vehicle violations on the road. Now this technology is applied to the parking lot system, which not only improves the management efficiency of the parking lot, but also improves the intelligent level. Although the recognition technology can not be 100% recognized, it can also reach more than 98%, It has obvious advantages over the parking lot without license plate recognition before.It is believed that it will not be difficult to realize 100% recognition in the near future. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.

Whether a license plate recognition system is practical or not, the most important index is the recognition rate. International transportation technology has made a special discussion on the recognition rate index, which requires that the correct recognition rate of all signs is 85% 95% 24 hours a day. In order to test the recognition rate of a license plate recognition system, it is necessary to install the system in a practical application environment, operate for more than 24 hours all day, collect the license plate recognition of at least 1000 natural traffic flow, and store the vehicle license plate image and recognition results for retrieval and viewing. Then, we also need to get the actual passing vehicle image and the correct manual recognition results. After that, the following recognition rates can be counted: 1. Recognition rate of natural traffic flow = total number of correctly recognized full license plates / total number of actually passing vehicles 2. Percentage of recognizable license plates = total number of correctly read license plates manually / total number of actually passing vehicles 3 The correct recognition rate of the whole license plate that can be recognized = the total number of correctly recognized license plates of the whole license plate / the total number of manually read license plates. These three indicators determine the recognition rate of the license plate recognition system, such as reliability and false recognition rate, which are the intermediate results in the process of license plate recognition. The recognition speed determines whether a license plate recognition system can meet the requirements of real-time practical application. If a system with high recognition rate needs a few seconds or even minutes to recognize the results, the system will be of no practical significance because it can not meet the real-time requirements in practical applications. For example, in highway toll collection, one of the functions of license plate recognition application is to reduce traffic time, and speed is a powerful guarantee to reduce traffic time and avoid lane traffic jam in this kind of application. The recognition speed proposed by international transportation technology is less than 1 second, the faster the better.

Installation method and precautions of license plate recognition parking lot system; 4. During outdoor wiring, the line shall be protected by JDG galvanized iron pipe. Buried lines shall be laid through PVC pipes, and indoor wiring shall also be maintained and fixed through PVC pipes. 1 It is widely used. Based on digital image processing, pattern recognition, computer vision and other technologies, license plate recognition system refers to the technology that can detect vehicles on the monitored road and automatically extract vehicle license plate information (including Chinese characters, English letters, Arabic numerals and license plate color) for disposal. License plate recognition is one of the important parts of modern intelligent transportation system. Analyze the vehicle image or video sequence captured by the camera to obtain the unique license plate number of each vehicle, so as to complete the recognition process. Measurement of traffic flow control indicators can realize parking lot charge management through some subsequent disposal means.Vehicle positioning, automobile anti-theft, automatic supervision of Expressway speeding, electronic police running red lights, highway toll stations and so on. It has practical significance for maintaining traffic safety and urban public security, preventing traffic congestion and realizing traffic automation management. 2 Automatic license plate recognition technology can realize the automatic registration and verification of vehicle "identity" without any change. The vehicle license plate number is the only "identity" identification of the vehicle. This technology has been applied to various occasions, such as highway toll collection, parking management, weighing system, traffic guidance, traffic law enforcement, highway inspection, vehicle scheduling, vehicle detection and so on. The installation process and precautions of license plate recognition system greatly affect the working performance of the whole license plate recognition system.A complete set of license plate recognition system includes license plate recognition all-in-one machine, parking lot toll display screen, intelligent gate, license plate recognition software, etc. Whether the devices of these equipment are standardized. A detailed survey shall be conducted on the project site, and the license plate recognition equipment shall be installed before the installation. To understand the customer's needs and formulate a perfect construction process, what factors should be emphasized in the field investigation and device process? 1. The device of the main equipment of license plate recognition, which will directly affect the effect of license plate recognition. 1 first, determine the device position of the integrated license plate recognition machine. It needs to be determined according to the site environment and conditions of each entrance and exit. Generally, one camera is installed in one lane.If the direction is not fixed when the vehicle enters the lane, the identification will be affected if the angle is too large. It is necessary to consider installing an auxiliary camera to ensure that the front of the vehicle can be identified no matter which side it is biased. Then it is necessary to determine the device position of the camera and coil: the best distance between the camera and the side of the incoming direction of the coil is 4-4.5m. The position of the coil shall ensure that the front direction of the vehicle is biased to the side of the camera as far as possible when the vehicle triggers the vehicle detector. 2 secondly, if capture identification is used. This allows the camera to take clear and complete pictures. If it is a single channel (the entrance and exit are in the same lane), a two-way vehicle detector needs to be used.There is no need to install ground induction coil and vehicle detector. If video recognition mode is used. The device is located behind the camera (30cm away from the camera pole, 3 and then determine the position of the barrier gate and anti smashing coil: the barrier gate is generally installed on the same side of the camera. Ensure that the barrier gate can be opened conveniently). The anti smashing coil is located in the middle right below the barrier bar. It is necessary to ensure that no part of the vehicle body is below the barrier bar when the front triggers the coil and when the rear leaves the coil.If the ground is brick or asphalt, 4 cameras and gates shall be installed on solid ground. It is necessary to consider pouring cement piers on broken pavement to increase stability. Before the installation of the above equipment, the wiring mode of the line shall be determined, and the threading pipe shall be reserved in advance according to the position of the equipment. In order to ensure that the recognition effect will not be affected by the vehicle speed, it is recommended to control the vehicle speed with a deceleration belt. 2 license plate recognition auxiliary equipment is used for charging. 1. Configure computer and server: the computer is generally placed in the entrance guard box or duty room. Optical fiber shall be laid from the sentry box to the server, and the server shall be placed in the customer's office or sentry box according to the customer's needs.If it's in the office. When investigating the site, the distance from the optical fiber to the nearest sentry box shall be estimated and allowance shall be made. If the client does not need to set up the server separately, the sentry box machine is used as the server, device database and FTP service. Gigabit 8-port or 5-port switches are generally selected. The switch should be placed in the guard box or distribution box nearby. 2. The switch shall be selected according to the number of devices to be networked.Ping an island is generally poured with concrete. The size of Ping'an island shall ensure that there is sufficient installation space for equipment such as sentry box or road gate. 3. Make Ping'an island and sentry box: set Ping'an Island according to needs and site conditions. And it will not affect the passing of vehicles. The threading pipe shall be embedded during the pouring of Ping'an island. After the completion of Ping An Island, you can brush paint to increase the eye-catching effect.For the convenience of charging, the sentry box is generally installed at the entrance of the parking lot. The size shall be determined according to the size of Ping'an island or the location of the device, but it must be ensured that there is enough space in the post box to accommodate computers and other equipment and the work of toll collectors. You can choose the device installed on Ping'an island or placed in the sentry box, duty room and 4 distribution box. If it is placed outdoors, it shall be rain proof and grounded. 3. The license plate recognition construction data integrated box, integrated machine and road gate shall be grounded. The air switch for bus power supply shall be selected according to the total power of all equipment.The power supply bus of 1 equipment shall use no less than rvv3 * 1.5 cables. Prevent overload tripping. Use category 6 network cable. When the transmission distance is greater than 100m, 2 when transmitting network data. The optical fiber needs to be laid. Generally, single-mode optical fiber is used. At least 2 cores shall be reserved for standby at each optical fiber access point on site.The total number of cores shall be determined according to the access points and the number of fusion cores at each access point. When transmitting 485 signals, shielded cables shall be used. When threading, strong and weak current lines must be separated. Each pair of transceivers uses 2-core optical fibers. The specific model and quantity can be determined according to the needs of customers or projects. 3. Gigabit single-mode dual fiber type can be selected for optical fiber transceiver.

With the rapid development of the Internet, the parking lot system is gradually updating from generation to generation. The traditional parking lot system architecture has long been thrown out of the sky. The current intelligent parking lot system can not meet people's living needs. With the application of license plate recognition technology to the parking lot system, the parking problem has been greatly improved, Compared with other card swiping or Bluetooth remote card reading parking lot systems, it has different charm, which is also the reason why it is very popular. Let's take a look at the charm of the popular license plate recognition parking lot system.Charm 1. It can be recognized from a large angle in the parking lot. Compared with the electronic police and other scenes, the recognition from a large angle is the biggest difference between the parking lot and other scenes, and it is also the biggest bottleneck of the license plate recognition technology in the parking lot environment. It is difficult for the license plate recognition system to capture the rectangular license plate in the conventional proportion under the large angle of the parking lot. The license plate imaging deformation caused by the large angle is one of the recognized technical difficulties of license plate recognition. The difficulties are as follows: 1. Difficult license plate location: due to the angle taken by the license plate recognition camera, the license plate image is often not rectangular, Therefore, affine deformation must be made first to correct it into a rectangular image.Therefore, it is not easy to extract license plates from such a complex external environment. 2. Image correction is more difficult: image correction uses directional high pass filtering (directional differentiation) to determine the direction of motion blur. Then the fuzzy scale is calculated by using the correlation principle. Charm 2. The recognition speed is quite fast. For the license plate recognition camera, the farther it is, the smaller the pixel is, and the closer it is, the larger the pixel is. Compared with other scenes, the lane of the parking lot is shorter, and the recognition of the current license plate recognition system is real-time.It is a typical contradiction to support the recognition of license plates with large pixel width while ensuring the recognition speed. Generally, if the license plate pixel width is too large, the recognition speed must be slow. If the recognition speed is fast, the license plate pixel width is required to be within a certain range. Charm III. The matching rate of vehicles at the entrance and exit of the parking lot is quite high. The architecture and internal recognition algorithm of the license plate recognition system are also constantly improved and improved.It is particularly noteworthy that some technologies extended and developed based on the hardware platform of license plate recognition, such as video speed measurement, vehicle type recognition, vehicle local feature recognition and comparison equivalence technology cooperate with license plate recognition to achieve the best vehicle matching rate at the entrance and exit of the parking lot, which is also a feature only available in the parking lot environment. Charm IV. parking charges are more strict. For the artificial cash charging method, on the one hand, it has high labor intensity and low efficiency. Another main disadvantage is that it causes great loopholes and cash loss in finance. Using the license plate recognition car parking management system, the system has a client and a management end.The management end can provide rich report statistics functions. The fees charged by the toll collector per shift need to match the fees displayed by the system, so as to eliminate cheating and protect the interests of the parking lot manager. Charm v. blacklist and white list functions can be added. A major feature of the community parking lot is that the vehicles in and out every day are basically fixed. Therefore, for this part of vehicles, the white list function of the license plate recognition system can be used.After importing the white list in the license plate recognition system, the vehicles in the white list function list can be automatically opened and released. You can also add a blacklist to the vehicles you don't want to put in. License plate recognition system was first applied in intelligent transportation, mainly used to detect vehicle violations on the road. Now this technology is applied to the parking lot system, which not only improves the management efficiency of the parking lot, but also improves the intelligent level. Although the recognition technology can not be 100% recognized, it can also reach more than 98%, It has obvious advantages over the parking lot without license plate recognition before.It is believed that it will not be difficult to realize 100% recognition in the near future. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.

Parking lots have been developed in China for decades. From the traditional card swiping and ticket collection to the current license plate recognition, although the changes are a little big, in the final analysis, it is still necessary to let vehicles in and out and leave information. As a more advanced technology, license plate recognition has been used in parking lots to greatly alleviate the problem of parking. License plate recognition parking lot system has realized the process from paper ticket management to unattended, leading parking into the era of real name management. License plate recognition system is a special computer vision system aiming at vehicle license plate.License plate recognition system is not only applied in parking lot, but also plays a very important role in traffic field. It can be said that it is an important part of intelligent transportation system and one of the main functional modules of high-tech highway traffic monitoring and management system. It can be widely used in traffic flow detection, traffic control and guidance, vehicle management in airports, ports and communities, automatic toll collection without stopping, red light running and other illegal vehicle monitoring. License plate recognition technology is combined with electronic non-stop toll collection system (etc) to identify vehicles. When passing vehicles pass through the crossing, they do not need to stop, that is, they can realize automatic vehicle identification and automatic toll collection.In the parking lot management, in order to improve the traffic efficiency of vehicles at the entrance and exit, license plate recognition is building an unattended fast track for vehicles that do not need to charge parking fees (such as monthly trucks and internal free vehicles), and the access experience of card free and non parking is changing the management mode of access to the parking lot. The opening of the gate and the release of vehicles are realized by capturing the license plate number of entering and leaving the site. We know that the license plate number is the only identification information of the vehicle. Through the license plate number, we can know the information of the vehicle. At the same time, the license plate recognition system can not only identify the license plate number information of the vehicle, but also capture the vehicle model and body, It effectively ensures the parking safety of car owners.At the same time, for the parking lot, the parking information of car owners can be queried through the capture records of entering and leaving the site, so as to avoid false reporting of lost car information. In addition to the functional changes, the appearance changes of the license plate recognition parking lot system make the parking lot more high-end. Due to the different parking lots, the license plate recognition system needs to be set differently according to the vehicles in the parking lot, such as some military regions and other special places, The license plate recognition parking lot system can distinguish the license plate numbers of special vehicles and ordinary vehicles in the police area, so as to ensure the safety of vehicles in and out. In recent years, with the gradual increase of vehicles, many parking lots can not meet people's needs. Because of this, vehicles should have a real name system, whether in management or ensuring vehicle safety.Intelligent car parking system integrates license plate recognition technology, computer network, video monitoring, image recognition and processing and automatic control technology. At the same time, according to the needs of the parking lot, new management modules are continuously added to connect with the system platform to meet the needs of parking lot management. Tigerwong parking equipment supplier has focused on parking equipment for many years! If you have any questions about the parking system, welcome to consult and communicate.