Network-connectable displacement sensor with stored ID
US5726567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Apr 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2210/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A displacement sensor comprises a measuring head which measures displacement by variation in frequency of an oscillator due to movement of a core in a coil. The signal from the oscillator is used to gate a high frequency crystal clock into a counter. The count is representative of the change in frequency of the oscillator and thus the displacement to be measured. The count is compared by a microprocessor with a look-up table stored in the memory during initial calibration. The operating and processing electronics connected to the sensor head are mounted in a connector which can be directly coupled to connectors of other sensors to form a bus connecting multiple sensors to a data logger or computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.