Communications: electrical – Continuously variable indicating – Condition responsive
Patent
1984-09-02
1986-12-23
Myracle, Jerry W.
Communications: electrical
Continuously variable indicating
Condition responsive
340501, G08C 1908
Patent
active
046315373
ABSTRACT:
A method for temperature compensating a position indicator which includes a sensor for producing an output signal whose magnitude corresponds to the position of an element that is linearly movable between first and second positions and which is subject to changes in temperature within a given temperature range and wherein the output signal of the sensor contains a temperature variable offset component and the rate of increase of the output signal as the element moves from the first to the second position fluctuates with changes in temperature. The method includes measuring the temperature of the medium; generating an electrical representation of an offset correction, relative to a reference temperature, required in the offset component of the output signal of the sensor at the temperature of the element; generating electrical representations of a rate correction factor, relative to a reference temperature, required for the rate of increase in the output signal of the sensor at the temperature of the element; causing the sensor to produce an output signal corresponding to the position of the element; and compensating the output signal of the sensor by forming an electrical representation of the product of the sensor output signal and the rate correction factor at the measured temperature of the medium, and adding to such product the offset correction at the measured temperature of the medium.
REFERENCES:
patent: 2772383 (1956-11-01), Bradley et al.
patent: 2917445 (1959-12-01), Oakes et al.
patent: 3441834 (1969-04-01), Moskowitz et al.
patent: 3846771 (1974-11-01), Young et al.
patent: 3893090 (1975-07-01), Neuner et al.
Boomgaard Dirk J.
Geis Charles G.
Neuner James A.
Wilbur Susan A.
Abeles Daniel C.
Myracle Jerry W.
Westinghouse Electric Corp.
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