In fact, the reversing radar is the same as the radar we know (otherwise it is called reversing radar), and it is designed and developed according to the principle that bats fly at high speed in the dark without colliding with any obstacles. The sensor sends out ultrasonic waves, and then uses the reflected ultrasonic waves to judge whether there is an obstacle in front, as well as the distance, size, direction and shape of the obstacle. However, due to the limitation of the size and practicability of the reversing radar, the main function of the reversing radar at present is to judge the distance of obstacles and give tips for the driver to judge.
The usual reversing radar is mainly composed of three parts: sensor (probe), host computer and display equipment. The sensor is the mechanism that sends and receives ultrasonic signals, and then transmits the obtained signals to the computer in the host computer for analysis, and then displays them through the display device. The control head is installed on the rear bumper. Depending on the price and brand, there are two, three, four and six probes, and some high-end imported cars even have to be equipped with eight probes to control the front and rear respectively. The detector radiates at a 45-degree angle, searching for the target from top to bottom and left and right. Jingjing's biggest advantage is that she can explore obstacles that are lower than the bumper and difficult for the driver to see from the rear window, and call the police, such as flower beds and children squatting behind the car. A reversing radar display is installed on the bridge to constantly remind the driver how far the car is from the objects behind. When it reaches a dangerous distance, the buzzer starts to sound to stop the driver.
According to the probe, there are three kinds of reversing radar: attached, drilled and suspended. There is a layer of glue behind the adhesive probe, which can be directly attached to the rear bumper. The drilling head is to make a hole in the bumper and then insert the probe. The suspended probe is mainly used for freight cars. There are three kinds of displays: digital display, color display and buzzer. The digital display is a box the size of a BB, which is installed on the bridge. The distance is directly expressed by numbers, accurate to 0.0 1 m, so that the driver can see it at a glance. Drivers will be reminded that 1.5m to 0.8m is a safe area, 0.8m to 0.3m is a suitable area, and 0.3m to 0. 1m is a dangerous area. In a safe area, you can park normally; In an appropriate area, you should slow down and stop; You should stop in a dangerous area.