Thermal measuring and testing – Temperature measurement – Combined with diverse art device
Patent
1982-09-30
1986-09-02
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
Combined with diverse art device
123198R, 364571, 374147, 374170, G01M 1500, G01K 1300
Patent
active
046092927
ABSTRACT:
A device and method for measuring a temperature difference at different positions which cancels offset voltages produced by a temperature sensitive element, e.g., a thermocouple used in the device and the device itself. The device comprises: (a) an amplifier for receiving and amplifying the output signal produced by the temperature sensitive element and output ting a voltage corresponding to a sensed temperature difference; (b) a comparator for determining that the output signal of the temperature sensitive element should be zero level by sensing a condition that the temperature difference between the two different positions is zero; (c) a memory for storing the value of the voltage of the amplifying means outputted when the comparator determines that the output signal of the temperature sensitive element should be at a zero level; and (d) means for subtracting the stored voltage value in the memory from the current output voltage value of the amplifier so as to obtain a modified output voltage value accurately corresponding to the current temperature difference free from offset voltage errors.
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Asano Masaharu
Kawamura Yoshihisa
Nakagawa Toyoaki
Nissan Motor Company Limited
Yasich Daniel M.
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