First, Working principle
The system calculates the speed of the passing vehicle by radar, locates and tracks the speeding vehicle, and gives the camera command to capture, so that the camera can complete the continuous capture, which reflects the displacement process of the vehicle in the continuous capture pictures. The background processing system classifies and manages the captured pictures, making them the basis of final punishment.
Two. system composition
The system is mainly composed of embedded snapshot host, night light supplement lamp, distribution system, positioning system, data transmission system, monitoring system, solar power supply system, outdoor box, vertical pole and so on.
2.1 Capture Host
useThe speed measuring host of Linux system, equipped with narrow-beam radar, can accurately capture speeding vehicles. High-definition industrial camera with 300W pixels makes illegal photos clear. The main engine has built-in UPS power supply. When the external power supply fails, it can ensure that the tachometer works normally for more than 10 hours. When the power is restored, the external power supply is automatically converted. The main engine of the tachometer is embedded in the positioning system to provide position support for the police when the tachometer is lost. 4G image transfer function makes image download more flexible
2.2 Night Supplementary Light
The stroboscopic pulse adjustable flash lamp is used to eliminate the influence of flash lamp on drivers. At the same time, through multiple flashes, not only the license plate can be clearly photographed, but also the features of vehicle types and drivers can be distinguished, which strengthens the persuasion of illegal evidence collection.
2.3 Distribution System
12V safe voltage output, with lightning protector, can effectively avoid damage to equipment caused by lightning strike.
2.4 Positioning System
Integrating in the tachometer, various positioning modes can check the position of the tachometer at any time and equipped with electronic fence function. When the tachometer leaves the setting area, it will alarm.
2.5 Data Transmission System
Various data transmission modes,U-disk download: U-disk automatically downloads illegal pictures after it is connected to the U-port of the tachometer; 4-G network download: the tachometer has built-in 4-G Internet module, installed platform software in the background, downloaded illegal pictures through 4-G network; optical transmission: tachometer external network interface, after accessing the optical fiber, downloaded illegal pictures through platform software.
2.6 Monitoring System
Dual-ended monitoring can monitor the location globally, and upload criminal evidence when the illegal elements destroy the location.
2.7 Solar Power Supply System
There is no constant current at the point.At 220V, the solar power supply mode can be selected, and the power supply guarantee for the speed measurement system can be provided when the weather is rainy for five consecutive days.
2.8 Outdoor protection box
Double-layer steel plate, good thermal insulation, dust-proof, rain-proof, anti-damage
2.9 Stand
Standard height2.5 meters, can be customized according to customer requirements
Three.system function
3.1 Vehicle Capture Function
A planar multi-point matrix narrow-beam velocity radar is used in the system.Vehicle speed measurement and acquisition can be carried out.Automatic detection of 1-4 lanes. At the same time, it can be set up to capture only speeding vehicles, or all vehicles passing through the point.
3.2 All-weather Capture Function
The system has the function of automatic snapping of all-weather speeding vehicles. Users can set the speed limit according to the actual needs. When vehicles pass, the system can automatically judge whether the vehicles are speeding or not. If they are speeding, the system can snap automatically. Users can also set up the snapping of all vehicles passing through the section. Systematic mininguse300MegapixelsThe CCD color camera and the high-speed shutter camera capture system with a minimum of 1/30000 seconds can ensure that the driver and license plate evidential photos are clear.
3.3 APP operation
Intelligent mobile phoneApp control capture software has the function of monitoring and alarming the working state of the equipment hardware. The captured pictures can be previewed remotely and real-time by mobile phone, and the pictures can be downloaded by mobile phone. Setting location information, speed limit value, snapshot direction, image file name, image overlay information, etc., can also view the number of snapshots remotely. After setting up, it can be separated from the tachometer without affecting the normal operation of the tachometer.
3.4 Remote Management Function
The system can pass throughThe 4G network can transfer the captured pictures to the remote APP receiver or the remote server. It can also provide remote maintenance and setup for the front-end devices through remote management.
3.5 Storage Function
The front-end storage of the system adopts memory card storage mode, which is safer and more stable than hard disk storage. There will be no data loss due to hard disk damage.
3.6 Download Function
When the system does not use network download, it can be downloaded throughU-disk download mode, you just need to insert the U-disk into the USB interface of the snapshot host to download automatically.
3.7 Positioning Function
Embedded systemGPS positioning module can query the location and historical trajectory set in real time.
Four. System characteristics
4.1 Embedded System is Stable and Reliable
UseLinux system, unlike XP system, will not have system crash, virus, file loss can not start and other issues. Embedded motherboard on Linux system adopts industrial chip, which reduces power consumption and ensures the stability of the system in harsh environment for a long time.
4.2 Clear image
The system has the function of auto-adjusting exposure and gain to solve the problem of a large number of invalid photographs caused by too bright license plate and too dark license plate in backlight shooting. Two consecutive photographs of illegal vehicles can clearly identify the number of license plate, the color of license plate, the color of body and the type of vehicle, and the total number of photographs taken. Effectiveness is greater than98%；When snapping at night, the system can make the snapshot image clear by triggering the flash to compensate the light continuously.More than twoImage resolution2048*1536
4.3 Illegal data conform to the latest standards
Each illegal picture superimposes the information required by the latest national standards such as the date of violation (year, month, day, hour, minute, second), the place of violation, driving direction, speed limit, driving speed, exceeding speed percentage, radar speed direction, image forensics equipment number, anti-counterfeiting and so on, and is clear and identifiable all-weather for the driving process of motor vehicles. The illegal acts of road traffic safety occurring in the process should be accurately timed when they are superimposed on the pictures of traffic violations.0.1s; for road traffic safety violations occurring in the process of motor vehicle stationary, the time of violations superimposed on traffic violation pictures should be accurate to 1.0s. Each picture of traffic safety violations of motor vehicles should contain the original anti-counterfeiting information identified by the higher public security department in the jurisdiction area, so as to prevent the original picture from being tampered with artificially in the process of transmission, storage and proofreading.
4.4 Using narrow pulse stroboflash Technology
In order to meet the needs of shooting without light source at night, the system needs to supplement the light of the photographed object. At present, most of the capture equipments use ordinary flash to supplement the light, which is difficult to solve the potential safety hazards caused by the strong light reflection of the license plate and the visual impact on the driver under the high intensity light irradiation. Although the license plate can be taken clearly by reducing the light intensity, it is difficult to take a clear picture of the vehicle type and the driver's features. For this reason, the system adopts a stroboscopic pulse adjustable flash lamp, which is difficult for drivers to detect in a short flash time and eliminates the influence of the flash lamp on drivers. At the same time, the system can not only clearly take the license plate through multiple flashes, but also distinguish the vehicle type and the features of drivers, and strengthen the evidence collection in violation of regulations. Persuasiveness
4.5 Narrow Beam Radar
The use of flat-panel narrow-beam radar can effectively prevent misjudgment and has certain anti-electronic monitoring function. It can distinguish the driving direction of vehicles and achieve two-way snapping.
4.6 Remote Maintenance Function
Through4G network, remote maintenance of the front end in the background, reducing the maintenance workload of users
4.7 The overall power consumption of the system is small
Industrial devices are used in hardware circuit design. The whole machine has low power consumption and reliable performance. The working time of the built-in battery in the system can be reached.15H. In the selection of connectors, the system adopts imported high reliability connectors, which further ensures the stability of equipment operation. The body has LED battery voltage display function. Real-time control of battery power.
4.8 System is simple to operate
One-button switch,App operation only needs users to add location information and speed limit value.
4.9 Solar Power Supply
When installing in areas without municipal electricity, solar panels can be used for power supply. In rainy and cloudy days, the equipment can work continuously.About 5 days
4.10 Real-time Monitoring
Installation of surveillance cameras on site to ensure24-hour uninterrupted anti-cloth monitoring
