What is the principle of a reversing radar?
2 Answers
The principle of a reversing radar is: under the control of the controller, the sensor emits ultrasonic signals. When encountering an obstacle, an echo signal is generated. After the sensor receives the echo signal, the controller processes the data to determine the position of the obstacle, and the display shows the distance and issues a warning signal to achieve the purpose of safe parking. The full name of the reversing radar is the reversing anti-collision radar, also known as the parking assist device. It is a safety auxiliary device for parking or reversing a car. It can inform the driver of the surrounding obstacles through sound or more intuitive display, eliminating the troubles caused by the driver's need to look around when parking, reversing, or starting the vehicle, and helping the driver to eliminate the defects of blind spots and blurred vision, thereby improving driving safety.
When I reverse my car, I always rely on the parking sensors. They work by emitting ultrasonic signals. Once the sound waves are emitted and hit an obstacle, they bounce back. The radar's sensors then receive this signal. By calculating the time difference between the emission and return of the sound waves, multiplying it by the speed of sound, and dividing by two, the actual distance can be measured. When the distance is too close, the system alerts the driver with beeping sounds or a dashboard warning. This technology is especially useful in the dark, making obstacles in blind spots clearly visible and significantly reducing collision risks. Nowadays, many cars also combine a rearview camera with parking sensors to improve accuracy, but the basic principle remains the same. I’ve always thought this is a must-have tool for new drivers, making parking safer and easier. Just remember to avoid blocking the sensors, as it can affect detection performance.
