What type of sound wave does a parking sensor utilize?
1 Answers
Parking sensors utilize ultrasonic waves. Below is an introduction to ultrasonic waves: 1. Ultrasonic transducers can be divided into two main categories: those that generate ultrasonic waves electrically and those that generate them mechanically. The more commonly used type is the piezoelectric ultrasonic generator, which consists of two piezoelectric crystals and a resonant plate. When a pulse signal with a frequency matching the natural oscillation frequency of the piezoelectric crystals is applied to its electrodes, the piezoelectric crystals will resonate, driving the resonant plate to vibrate and thereby producing ultrasonic waves. 2. If no voltage is applied between the electrodes, when the resonant plate receives ultrasonic waves, the piezoelectric crystals will vibrate, converting mechanical energy into electrical signals. 3. Parking sensor distance measurement: The parking sensor emits an ultrasonic signal at a certain moment, which reflects off the detected object and is received back by the parking sensor. By calculating the time taken for the ultrasonic signal to travel from emission to reception and knowing the propagation speed in the medium, the distance to the detected object can be determined. 4. Parking sensor probes can come with a housing and wiring or as bare probes. The products undergo high and low-temperature aging to ensure stable performance. Outer diameters range from 10mm to 22mm, with various models and specifications designed as needed.
