Variable-capacity tire thickness sensor

Abstract

The invention provides a variable-capacitance tire thickness sensor which comprises a capacitance sensing unit and a controller, the capacitance sensing unit comprises two conductive electrodes and aninsulating medium arranged between the two conductive electrodes, and the capacitance sensing unit is arranged or integrally formed on the surface of a tire. The controller is electrically connectedto the two conductive electrodes of the capacitance sensing unit, detects the capacitance value between the two conductive electrodes to obtain the capacitance value of the two conductive electrodes,and calculates and obtains the thickness of the tire according to the capacitance value.

Description

technical field [0001] The invention relates to a tire thickness sensor, in particular to a tire thickness sensor which detects the tire thickness according to capacitance variation. Background technique [0002] According to the Taiwan Road Traffic Safety Survey, there were as many as 370 tire blowout incidents on expressways in 2016, 200 of which were the separation of the car from the tire, and 7,585 incidents of skin peeling. In addition, the survey also pointed out that from 2009 to 2015, There are as many as 2,786 incidents of tire blowouts on expressways, 2,033 of which cause vehicle damage, while there are 753 casualties, and the casualty rate is as high as 27%. Such situations not only affect the safety of drivers themselves, but also What's more, it may further lead to a series of traffic accidents, causing serious casualties. [0003] The occurrence of tire blowouts, in addition to foreign matter invasion and tire blowouts caused by insufficient tire pressure, is...

AI Technical Summary

Problems solved by technology

Insufficient tire skin thickness not only affects the grip of the vehicle's tires, but when the tire skin thickness is lower than the safety limit, the tire will easily burst from the insufficient strength area on the tread surface, resulting in a puncture

[0004] In view of the above problems, the current mainstream tire skin thickness detection is directly judged by visual inspection. The judgment criterion is that the tread pattern of the tire must be 1.6mm above the safety line to meet the safety standard; in addition to the visual inspection method, the most mainstream method is It uses a tool (tread depth measuring device) to directly measure the depth of the tread to determine whether it meets the safety standards. The above two methods rely on the independent judgment of the car owner or maintenance plant personnel.

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