Capacitive position transducer
US4737699A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Mar 31, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive position transducer for detecting position changes or producing position feedback signals in a servorecorder comprises a rhombic transmitter electrode connected to a voltage source and a plurality of rectangular receiver electrodes insulated from and adjacent to each other. Current flowing through the coupled transmitter and receiver electrodes is rectified by diode circuits and flows through a circuit of serially connected resistors, thereby forming an output voltage signal at an end of the resistor circuit. The linearity of the output voltage signal can be changed by changing the value of the resistors in the resistor circuit. The capacitive position transducer can also provide commutating signals required by brushless linear motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.