Solid-state micro proximity sensor
US5512836A · kind A · utility
66Cited by
20References
23Claims
0Family size
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Apr 30, 1996 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9602
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A solid-state fringe effect capacitive proximity sensor is described which lends itself to use for surface mounting and other space constrained applications. The sensor comprises an insulating substrate having a plurality of sensing electrodes formed thereon and without any screen elements therebetween. The electrodes are adapted to measure the proximity distance of a target object (conductive or non-conductive) by means of the fringe capacitance effect created between the electrodes. Capacitance measurement processing circuitry is electrically connected to the plurality of sensory electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.