Backing up a vehicle or reversing is very important when you are going to park your car in a small space or between two vehicles. To reverse a vehicle safely you should have a good visibility of the back of your car. Vehicles with poor rear visibility are always very hard to backup. Even there is a rear view mirror; it is not enough to determine the distance to the back obstacle when reversing. Most collisions happen in reversing vehicles due to the invisibility of objects behind the vehicle.
Vehicle reverse or backup sensors can be effective to back a vehicle safely. These back sensors are very useful and affordable for any driver who cares about safety and protection of the vehicle, especially with poor rear view capability. This will prevent you from hitting obstacles such as objects which are not high as up to the level you can see through back window, another vehicle or even people when you reversing.
With backup sensors installed you can prevent hitting your vehicle with these obstacles behind the car when reversing or parking parallel. Sensors use ultrasonic wave technology to detect the objects behind the vehicle. Each sensor emits a signal which bounces after hitting obstacles and return back to sensor head. The distance to objects will be calculated by using the time difference since the signal sent out and to return. So the closer the object to the vehicle, the less time takes signal to return and displays the distance to the obstacle in the LCD display. When the object comes closer a beep sounds and the beep becomes a continuous tone to alert driver to stop the vehicle.
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