JPS6428522A - Flow rate sensor - Google Patents

Flow rate sensor

Info

Publication number
JPS6428522A
JPS6428522A JP62184319A JP18431987A JPS6428522A JP S6428522 A JPS6428522 A JP S6428522A JP 62184319 A JP62184319 A JP 62184319A JP 18431987 A JP18431987 A JP 18431987A JP S6428522 A JPS6428522 A JP S6428522A
Authority
JP
Japan
Prior art keywords
signal
flow rate
heat generating
generating body
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62184319A
Other languages
Japanese (ja)
Inventor
Masayuki Kamegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
Original Assignee
Shimadzu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP62184319A priority Critical patent/JPS6428522A/en
Publication of JPS6428522A publication Critical patent/JPS6428522A/en
Pending legal-status Critical Current

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  • Measuring Volume Flow (AREA)

Abstract

PURPOSE:To obtain a highly sensitive sensor with an improved S/N ratio of a flow rate signal, by driving a heat generating body by an AC signal with a specified frequency to obtain a flow rate signal by selecting of a signal with the frequency the same as a drive AC signal from a temperature measurement signal. CONSTITUTION:A heat generating body (a) contacting a fluid is driven by an AC signal with a specified frequency f0 from a drive circuit means (b). The temperature of the heat generating body (a) is measured by a temperature measuring means (c) and a frequency component signal to be identified as a heat generating body drive AC signal is selected with a bandpass filter (d) from the temperature measurement signal to obtain a flow rate signal. In this case, when a power of a drive signal of the heat generating body (a) is fixed, the amplitude of the signal changes depending on the flow rate of a fluid, providing an amplitude modulation type in substance. This eliminates the most of a heat noise component from a temperature sensor and a noise component of a preamplifier thereby producing a highly sensitive sensor with an improved in the S/N ratio of the flow rate signal.
JP62184319A 1987-07-22 1987-07-22 Flow rate sensor Pending JPS6428522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62184319A JPS6428522A (en) 1987-07-22 1987-07-22 Flow rate sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62184319A JPS6428522A (en) 1987-07-22 1987-07-22 Flow rate sensor

Publications (1)

Publication Number Publication Date
JPS6428522A true JPS6428522A (en) 1989-01-31

Family

ID=16151252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62184319A Pending JPS6428522A (en) 1987-07-22 1987-07-22 Flow rate sensor

Country Status (1)

Country Link
JP (1) JPS6428522A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008510510A (en) * 2004-08-20 2008-04-10 フィッシャー アンド ペイケル ヘルスケア リミテッド Device for measuring the characteristics of the gas supplied to the patient
WO2024143146A1 (en) * 2022-12-29 2024-07-04 ＴｏｐｏＬｏｇｉｃ株式会社 Measuring device and measuring unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008510510A (en) * 2004-08-20 2008-04-10 フィッシャー アンド ペイケル ヘルスケア リミテッド Device for measuring the characteristics of the gas supplied to the patient
WO2024143146A1 (en) * 2022-12-29 2024-07-04 ＴｏｐｏＬｏｇｉｃ株式会社 Measuring device and measuring unit

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