[汽车修理知识]About PDC Parking Sensor

carNew technologies can be said to be changing with each passing day. With the development of automobile technology, there are more and more new technical terms about automobiles. PDCReversing radarIt's a recent one. So what exactly is PDC and what are its effects?

In fact, PDC direct translation is not a reversing radar. Its full English name is Parking Distance Control, which translates to the scientific name parking distance control system. The automotive industry calls it parking radar. The working principle of the PDC system is that it is usually behind the carbumperOr the front and rear bumpers are equipped with radar detectors to detect obstacles in the front and rear, to help the driver "see" the obstacles in the front and rear, or the distance from other cars when parking. This device is not only convenient for parking, but also Protect the body from scratches. PDC uses an ultrasonic sensor to detect the distance of the obstacle closest to the car and emit a siren to warn the driver. The control of the siren sound is usually divided into two stages. When the distance of the vehicle reaches a certain starting detection distance, the siren sound starts to sound with a certain high-frequency siren sound, and when the vehicle travels closer to a certain distance When the time, the siren sound is changed to a continuous siren sound to inform the driver. The advantage of PDC is that the driver can use hearing to obtain information about obstacles, or the distance of other cars. The PDC system mainly assists parking, so the system function will be turned off when a certain speed is reached or exceeded.

Now new cars have begun to use the digital no-blind spot PDC reversing radar system.sensorDesign, to achieve truly no blind spot detection, double warning of sound and image (on the radio panel display).The working principle of the digital no-blind spot PDC reversing radar is that when reverse gear is engaged, the PDC system is automatically activated. Four ultrasonic waves are embedded in the rear bumper of the car.sensorStart detecting obstacles behind. When the distance is 1.2 meters from the obstacle, the alarm system will emit a "di-di" sound. As the obstacle approaches, the frequency of the "di-di" sound increases. When the distance between the car and the obstacle is less than 0.3 meters, the "di-di" sound "Will be converted into a continuous tone.

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