Inductive sensor
US9651401B2 · kind B2 · utility
0Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2009 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Nov 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor and a method for detecting objects using an inductive sensor. An electrical alternating field is generated by using an oscillating circuit, wherein the amplitude and/or frequency of a signal of the oscillating circuit changes when an object is present. The signal of the oscillating circuit is rectified. The rectified signal is relayed to a high-pass filter, wherein damping of the oscillating circuit caused by nonmoving objects is filtered by the high-pass filter. The signal is compared with a threshold value, and an output signal is generated when the signal value is above or below the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.