TEMPERATURE DETECTOR

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20200264054A1
SERIAL NO

16349627

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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To provide a temperature detector without possibility of interruption in temperature detection in detecting a temperature based on a change in oscillation frequency of a crystal element. First and second vibrating regions are formed on a crystal element, the first or the second vibrating region is oscillated with a third harmonic or a fundamental wave by switching switches. A data processing portion obtains frequency change rates of the third harmonic and the fundamental wave in the first vibrating region, and detects the temperature from a difference between them. Further, whether the oscillation of the first vibrating region is abnormal is monitored based on the measurement result of the frequency of the first vibrating region, and when the abnormality is determined, the temperature is detected from similar difference using the second vibrating region.

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Patent Owner(s)

Patent OwnerAddress
NIHON DEMPA KOGYO CO LTD1-47-1 SASAZUKA SHIBUYA-KU TOKYO 151-8569

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ISHIKAWA, Takayuki Saitama, JP 164 1568
KUKITA, Hiroyuki Saitama, JP 28 101
SHIOBARA, Tsuyoshi Saitama, JP 19 79
WAKAMATSU, Shunichi Saitama, JP 46 176

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