How to Determine the Distance of a Parking Sensor?
2 Answers
Determine the distance of a parking sensor through sound. Here are the specific details about parking sensors: 1. The parking sensor emits an alarm sound at a certain frequency, and the frequency increases as the obstacle gets closer. 2. When the alarm sound frequency becomes faster and turns into a continuous beep, it indicates that the parking distance has reached its limit. Below is additional information on the working principle of parking sensors: 1. A parking sensor consists of three components: an ultrasonic sensor, a controller, and a buzzer. 2. During operation, the ultrasonic sensor emits ultrasonic waves, which reflect off obstacles and are received back by the sensor. 3. The controller calculates the actual distance to the obstacle based on the time taken for the ultrasonic waves to be emitted and received by the sensor. 4. The buzzer emits a rapid alarm sound to alert the driver about the obstacle's distance.
The reversing radar mainly determines distance through changes in sound. When I drive myself, I often rely on this cue: when the radar detects an obstacle, it emits a beeping sound; when the object is far away, the sound is slower, perhaps beeping once every one or two seconds; as you get closer, the frequency of the sound increases, such as turning into rapid continuous beeps within 1 meter. Some cars also have visual aids, like color bars displayed on the central screen, where green indicates a safe distance and red signals danger. However, don’t rely entirely on the radar—always check the rearview mirror and surroundings when reversing, as the radar might malfunction or have weak signals in light rain, leading to misjudgment. It’s advisable to test the radar’s responsiveness before each reverse to ensure accurate distance estimation. With regular practice, you’ll quickly develop a sense of distance differences—practice makes perfect.
