Title:
TEMPERATURE MEASURING APPARATUS OF CHARGED BODY
Document Type and Number:
Japanese Patent JPH01172714
Kind Code:
A
Abstract:
PURPOSE:To make it possible to perform accurate, stable temperature measurement for a long period, by using a temperature sensor comprising a piezoelectric element, and arresting the resonant reverberation signal of the sensor. CONSTITUTION:An intermittent detected signal A, whose frequency is changed from f1-fn stepwise, is transmitted to a temperature sensor 1 through an electromagnetic coupling part 4 from a transmitting part 2 in a transmitting mode. Then the temperature sensor 1 is resonated at a constant frequency. When the detected signal becomes an OFF state, the mode is changed into a receiving mode by the operation of a mode switching part 11. At the same time, the resonance of the temperature sensor 1 is stopped. However a gradually attenuating reverberation signal B remains. Therefore, the signal B is received with a receiving part 3 through the electromagnetic coupling part 4. Since the resonance frequency of the temperature sensor 1 is changed with temperature, the temperature of a charged body can be found based on the frequency of the received reverberation signal B. Thus, the accurate, stable measurement of the temperature can be performed for a long period.
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Inventors:
MORIMOTO RYOZO
OOMI NORICHIKA
OI KYUICHI
MIYAZAKI ATSUTOSHI
OOMI NORICHIKA
OI KYUICHI
MIYAZAKI ATSUTOSHI
Application Number:
JP33257087A
Publication Date:
July 07, 1989
Filing Date:
December 28, 1987
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES
MEISEI ELECTRIC CO LTD
MEISEI ELECTRIC CO LTD
International Classes:
G01K7/32; (IPC1-7): G01K7/32
Domestic Patent References:
| JP46022718A | ||||
| JPS61105306A | 1986-05-23 |
Attorney, Agent or Firm:
Bunji Kamata