In order to improve the ability and level of modern governance of expressways and actively prevent and reduce the occurrence of road traffic accidents, the traffic management brigade of the Wanning Municipal Public Security Bureau has installed several sets of sound and light anti-fatigue early warning systems and LED speed feedback early warning screens in the road sections prone to traffic accidents in the expressway jurisdiction, with the purpose of warning and prevention, timely reminding drivers and drivers to pay attention to reducing speed and concentrating attention, so as to effectively reduce road traffic accidents caused by speeding or fatigue driving.
Multi-function LED speed feedback early warning screen is detected by radar, starting to measure speed when the car is 100 meters away from the early warning screen, the real-time speed of the vehicle appears on the early warning screen, when the vehicle is running normally, the number on the early warning screen also becomes green, when the vehicle is speeding, the number on the warning screen becomes red, and the alarm sounds and accompanies the loudspeaker shouting, warning the driver to reduce the speed.
Among them, the multi-function LED speed feedback early warning screen adopts the speed feedback radar TBR-510, which can detect the all-weather and all-day long distance detection of various types of vehicles in the detection area, and detect the feedback on the direction of the incoming car, the distance of the incoming car, the driving speed and the linkage warning.
How it works
The speed feedback instrument radar adopts microwave radar technology, using electromagnetic waves with an operating frequency of 0.3 to 300 GHz and a wavelength of 1 mm to 10 cm to detect the target, and the radar emits electromagnetic waves to irradiate the target and receive its echo (Doppler effect), thereby obtaining the distance, distance change rate (radial speed), azimuth, altitude and other information from the target to the electromagnetic wave transmission point.
The accurate measurement of the speed of the moving vehicle by microwave radar technology is based on the above microwave Doppler effect. Electromagnetic waves will be reflected when they encounter a moving vehicle during travel, and the frequency and amplitude of the electromagnetic waves reflected back will change with the moving state of the vehicle encountered. If the vehicle encountered by the electromagnetic wave is fixed, then the frequency of the reflected electromagnetic wave is unchanged; if the driving vehicle is moving in the direction of the electromagnetic wave emission, the electromagnetic wave reflected back at this time is compressed, and the frequency of the electromagnetic wave will increase; conversely, if the driving vehicle is moving in the direction away from the electromagnetic wave, the frequency of the reflected electromagnetic wave will decrease.
Product features
1. The detection distance is far, up to 150 meters
2. High precision, accurate output of test results
3. It can detect the speed of the vehicle and output early warning information
4. It can cover 1 to 4 lanes and reduce the cost of testing
5. Various functions, can detect vehicles and pedestrians
6. Anti-interference, not affected by weather and light intensity
7, no need to interrupt traffic, construction and maintenance is simple
8, 24.15GHz frequency band, and vehicle radar do not interfere with each other
9. The connection method is simple, and the radar is directly connected to the LED warning/intelligent control device
10, the product has low power consumption, less electricity consumption, and can use solar energy and other power supply methods
Product parameters
Fields of application
It is suitable for vehicle speed limits, limited visual distance, temporary construction, accident-prone highways, urban roads, national highways, provincial highways, county and rural roads and other grades of roads, as well as hospitals, campuses, industrial parks and other parks roadsides, intersections and sharp bends.