Method of transmitting measured temperature and position parameters from a transducer
US5253521A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetostrictive liquid level transducer equipped with a number of temperature sensitive resistors is supplied with low level power from a remote station and charges a capacitor to store power for interrogation of the level transducer. The transducer is interrogated periodically for level measurements and the capacitor is recharged between interrogations. During the recharging periods, temperature measurements are made. Thus the level and temperature related data is measured and transmitted alternately. Each measurement results in a pair of pulses having a spacing corresponding to the measured value. The transmission message comprises a plurality of frames or time periods. The first frame is blank and is used for synchronizing the receiving device with the message frames. The subsequent frames have the level and temperature related data interleaved in the message and are easily sorted by the receiving device at the remote station. The data pulses are sent on the power transmission conductors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.