Car 22MM Parking r Backup Parktronic Re Probe Black Red Blue Grey Sier Gold Aparcami

Package list：r*1

Note: The price of the product is 1PCS

You can also the r to your favorite color.

r knowledge: (for learning only)In order to study and waves, many s have been designed and made. rs, rs, hair rs can be divided into two categories1： The first type is to generate waves electrically,2： waves are generated mechanicallyAt present, the piezoelectric is more commonly d. It has two piezoelectric wafers and a resonance plate. When the signal is applied at its two poles and its frequency is equal to the natural oscillation frequency of the piezoelectric wafer, the piezoelectric wafer will resonate and drive the resonance plate to to produce wave. On the conry, if no voltage is applied between the two electrodes, when the resonance plate receives wave, The piezoelectric wafer will be compreed for vibration and the mechanical energy will be converted into electrical signals. At this time, it will become an r ranging: the r sends out an signal at a certain time, reflects it back when it meets the measured object, and is received by the . As long as the time from nsmitting to receiving the echo signal of the signal is calculated, and the propagation speed in the medium is known, the distance from the measured object can be calculated:

r installation requirements

1: Installation height is greater than 45 C M above the ground.

2: Ensure that the surface is perpendicular to the ground

Key: No rs cannot detect the ground.

Error 1: Height is le than 45CM

Error 2: The surface is not verticaround

Error 3: The surface is not verticaround