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A method of real-time detection of punctured vehicle tube by cladding capacitor-films in the inner tube and monitoring the capacitor/voltage variations Disclosure Number: IPCOM000248951D
Publication Date: 2017-Jan-24
Document File: 5 page(s) / 145K

Publishing Venue

The Prior Art Database


This purpose of this article is to implement real time detection of punctured vehicle tube by applying capacitor/voltage theory rather than electric current alone and it selects a peculiar material as the dielectric, such as BaO2 BaO2 has a big distinct capacitor value than others. So it can detect rupture caused by both conductible and in-conductible objects immediately. However, the traditional inventions can either only detect conductible objects or not in a real-time detection.

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A method of real-time detection of punctured vehicle tube by cladding capacitor-films in the inner tube and monitoring the

capacitor/voltage variations

This invention is to detect punctured vehicle tubes immediately no matter what kind of material has punctured it.

This invention makes use of capacitor theory to detect the tube puncture in two ways, either detecting the voltage variation or detecting the

capacitor variation. Clad a film-formed capacitor in the inner side of the tube and attach a voltage/capacitor detector/sensor on the wheel to

monitor capacitor/voltage change. In the very beginning the capacitor has already been charged by batteries. So the voltage is always a number

above zero and the capacitor is a certain value. However, if the capacitor is punctured, its voltage will become zero if the puncture splinter is

conductible object or the capacitor capacity changes dramatically to another value if the puncture object is dielectric, which is exactly the point

this patent is describing.

Before the further illustration, let’s have a basic knowledge of the capacitor structures. The plate capacitor, for example, is composed of insulator

and two metal plates (such as the aluminum platinum paper which is very extensible and conductible as below). So it’s not hard to clad such a

thin film of capacitor to the inner side of a vehicle tube at first.

Let’s assume the vehicle tube is clad with the capacitor like below. The yellow object is a thin film of capacitor. The black block on the superior

side is a charge interface and can charge the capacitor with a battery. The black block on the inferior side is a voltage/capacity meter which can


read the voltage/capacitor of the capacitor.

Normally the capacitor is charged and there’s always a positive voltage difference, as seen below (U is always larger than zero) or Q is above

zero too.


But once the tube is punctured, for example, by a nail as illustrated below, the capacitor will be short-circuited because nail conducts.

U becomes into zero. Q is released. The detector (the black block on the inferior side) detects the voltage difference between the two sides of the

capacitor and finds U become zero. Then it can send the alarm to the dashboard to aler...