Torque sensor
US6456090B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Feb 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/109
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A torque sensor includes a pair of detection coils having the impedances that change in opposite directions of each other corresponding to a torque generated in a rotation shaft. An AC voltage is applied on a bridge circuit including a pair of detection coils and a pair of resistors, a differential voltage between AC voltages that appear on both ends of the pair of detection coils is detected and sent out as the torque signal, and a failure of a circuit component of the torque detecting circuit is judged based on the phase difference between the waveform of the AC voltage applied on the bridge circuit and the waveform of the differential voltage between AC voltages that appear on both ends of the pair of detection coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.