Parking sensor

Reverse backup sensors

Reverse backup sensors - also known as reverse parking sensors, reverse parking systems, and reverse backing systems - are a technology that allows the driver of a car, truck, van or commercial vehicle to be alerted to nearby objects in their path.

While there are variants in the design and feaures of these systems, the basic design puts sensors in the car bumper or on brackets. These sensors send ultrasonic waves (4 times/second) that detect obstacles behind vehicle. A controller installed inside the vehicle then receives the signal from the sensors and transmits it to a speaker that emits a tone, or to a combination speaker and display unit.