Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Parking sensors are proximity sensors for road vehicles which can alert the driver to unseen obstacles during parking manoeuvres.The ultrasonic sensors are currently available in several brands of cars, with a variety of brand names such as Parktronic and Parking Aid. Some systems are also available as additional upgrade kits for later installation.Parking sensor systems use ultrasonic proximity detectors embedded in the front and/or rear bumpers, to measure the distances to nearby objects at low level. The sensors measure the time taken for each sound pulse to be reflected back to the receiver.

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