Condition sensor

Details Condition sensor Condition sensor

1982-10-28

1985-03-12

Krass, Errol A.

Boots, shoes, and leggings

307117, 374170, G05D 2324, G05D 2320

Patent

active

045049220

ABSTRACT:
A microprocessor controlled condition sensor comprising a parallel multiport microprocessor, precision resistor, capacitor, and one or more transducers (e.g., thermistor) determines the value of the condition being sensed (e.g. temperature) by calculating the resistance of the transducer through the ratio of interval 0/1 threshold timings determined by the RC time constants of precision resistor-capacitor and transducer-capacitor connections. The value of the condition (e.g., temperature) is subsequently obtained via a lookup table within the microprocessor which contains the relationship between transducer resistance and condition magnitude.

REFERENCES:
patent: 4161880 (1979-07-01), Prosky
patent: 4172982 (1979-10-01), Kompelien
patent: 4186315 (1980-01-01), Benton
patent: 4196356 (1980-04-01), Kabat
patent: 4211113 (1980-07-01), Harrison
patent: 4297851 (1981-11-01), Paddock et al.
patent: 4300199 (1981-11-01), Yoknis et al.
patent: 4370070 (1983-01-01), Leroux
Radio Electronics, Jun. 1978--"Microprocessor-Based Solar Controller"--Dave Corbin.

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