Sensor and evaluation system, in particular for double sensors for determining positions and limit values
US6429786B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1999 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Aug 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/243
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a sensor and evaluation system for capturing data at a measuring station (3), in particular for use in double sensors for determining end positions and limit values. The individual sensors (1, 1′, 2, 2′, 16, 16′) are operated as sensor pairs (1″, 2″, 16″) by a largely shared control circuit consisting of two connecting lines (5, 6) with an electric current or voltage of alternate polarity. A state of a sensor (1, 1′, 2, 2′, 16, 16′) is transmitted on the corresponding half-wave of the sensor current and evaluated by a switching amplifier (13) in relation to polarity and amplitude. Said sensor and evaluation system reduces the number of connecting lines required. In addition, interference from neighboring sensors is largely excluded, so that sensors can be mounted more closely together in a system. Said sensor and evaluation system is especially suited for equipment required to comply with the DIN 19234 (NAMUR) standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.