JPS5479089A - Absorption signal detecting device - Google Patents

Absorption signal detecting device

Info

Publication number
JPS5479089A
JPS5479089A JP14641277A JP14641277A JPS5479089A JP S5479089 A JPS5479089 A JP S5479089A JP 14641277 A JP14641277 A JP 14641277A JP 14641277 A JP14641277 A JP 14641277A JP S5479089 A JPS5479089 A JP S5479089A
Authority
JP
Japan
Prior art keywords
frequency
signal
absorption
generator
coincides
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.)
Granted
Application number
JP14641277A
Other languages
Japanese (ja)
Other versions
JPS593697B2 (en
Inventor
Akira Ote
Hideto Iwaoka
Koji Akiyama
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP14641277A priority Critical patent/JPS593697B2/en
Publication of JPS5479089A publication Critical patent/JPS5479089A/en
Publication of JPS593697B2 publication Critical patent/JPS593697B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

PURPOSE: To be applicable to resonance thermometer and realize detection of absorption frequency at high precision and high speed, by making the oscillation frequency of oscillator equal to the absorption frequency by using signals obtained by processing amplitude modulation signals from a sensor oscillator.
CONSTITUTION: When a measurement is commenced, a control circuit 4 sends a sweep start signal to a function generator 5, and a sensor oscillator 2 oscillates an oscillation frequency (ν). This frequency is swept by a lamp signal from the generator 5, and is modulated by a low frequency signal fm from a signal generator 3. When the frequency (ν) coincides with the absorption frequency νt of a material 11, the electromagnetic waves are absorbed by the material 11, and the amplitude is decreased. The circuit 4 performs a synchronous rectification operation of the modulation signal, and a control signal Ef is obtained. The signal Ef becomes zero when the frequency (ν) coincides with νt to be turned into a signal having the property of changing the polarity before and after such zero point. Therefore, the frequency is counted in a measuring circuit 7, and the temperature may be known. Hence, a device capable of detecting an absorption frequency at high precision and high speed may be realized.
COPYRIGHT: (C)1979,JPO&Japio
JP14641277A 1977-12-05 1977-12-05 Absorption signal detection device Expired JPS593697B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14641277A JPS593697B2 (en) 1977-12-05 1977-12-05 Absorption signal detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14641277A JPS593697B2 (en) 1977-12-05 1977-12-05 Absorption signal detection device

Publications (2)

Publication Number Publication Date
JPS5479089A true JPS5479089A (en) 1979-06-23
JPS593697B2 JPS593697B2 (en) 1984-01-25

Family

ID=15407101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14641277A Expired JPS593697B2 (en) 1977-12-05 1977-12-05 Absorption signal detection device

Country Status (1)

Country Link
JP (1) JPS593697B2 (en)

Also Published As

Publication number Publication date
JPS593697B2 (en) 1984-01-25

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