Solenoid motion detection circuit
US6211665A · kind A · utility
18Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Apr 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2013
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit arrangement is described which detects when the moving member of an electromagnetic device is in motion by detecting coincidence of energization of the device coil and a negative first differential of the current/time waveform and a positive first differential of the voltage/time waveform through said coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.