Method and device for determining wear of a carbon ceramic brake disc in a vehicle by impedance measurements
US10760633B2 · kind B2 · utility
0Cited by
5References
15Claims
0Family size
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Key dates
| Filing date | Jul 13, 2015 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Jun 4, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2200/0047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A quality value for a carbon ceramic brake disc (2) in a vehicle is measured by means of a measuring device (3) installed in the vehicle. The measuring device (3) with a coil (10) is located at a distance (d) from the brake disc (2) in order avoid direct physical contact with the brake disc. The impedance of the coil (10) is measured for at least two frequencies. The resulting measurement values that correlate to impedance values are introduced into a mathematical model in order to eliminate the dependence of the unknown distance (d) and to obtain a quality value dependent on the conductivity of the brake disc (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.