Remote addressable transducer provided with automatic calibratio

Details Remote addressable transducer provided with automatic calibratio Remote addressable transducer provided with automatic calibratio

1993-06-24

1995-12-12

Peng, John K.

Communications: electrical

Continuously variable indicating

With calibration

340501, 340505, 34082554, 34087021, G08C 2500

Patent

active

054753848

ABSTRACT:
The RAD transducer comprises a sensor (1) for measuring physical quantities, a power supply section (7), a clock section (2), a timing section (4,5) and a circuitry for the acquisition of a measurement and its frequency conversion for transmission. This acquisition circuitry includes a microcontroller (11), a memory (14) containing compensation parameters used in a calibrating process an analogue/digital converter (13) for converting analogue measurement delivered by the main sensor (1) in a digital form adapted to be processed by the microcontroller (11), a temperature sensor (15) converting a temperature value into a voltage value, an analogue/digital converter (16) for converting the analogue measurement given by the temperature sensor (15) into a digital form adapted to be processed by the microcontroller (11), and frequency generating meads (17) for generating the signal to be transmitted on the line through the power supply section.

REFERENCES:
patent: 4546344 (1985-10-01), Guscott et al.
patent: 4575806 (1986-03-01), Aldrich et al.
patent: 4642636 (1987-02-01), Smith et al.
patent: 4785284 (1988-11-01), Kimura
patent: 4816808 (1989-03-01), Morita
patent: 5200743 (1993-04-01), St. Martin et al.

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