JPS56158924A - Automatic luminance thermometer - Google Patents

Automatic luminance thermometer

Info

Publication number
JPS56158924A
JPS56158924A JP6259580A JP6259580A JPS56158924A JP S56158924 A JPS56158924 A JP S56158924A JP 6259580 A JP6259580 A JP 6259580A JP 6259580 A JP6259580 A JP 6259580A JP S56158924 A JPS56158924 A JP S56158924A
Authority
JP
Japan
Prior art keywords
output
integrator
circuit
switch
signal
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
JP6259580A
Other languages
Japanese (ja)
Other versions
JPS6058816B2 (en
Inventor
Mitsuo Nagata
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 JP55062595A priority Critical patent/JPS6058816B2/en
Publication of JPS56158924A publication Critical patent/JPS56158924A/en
Publication of JPS6058816B2 publication Critical patent/JPS6058816B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

PURPOSE:To obtain stable output even in the case of low luminance without using any rotating mechanism by using photodiodes in place of rotating sectors. CONSTITUTION:Photocurrents corresponding to the radiation energy of an object X to be measured and a comparing radiator R flow in photodiodes D1, D2 via an optical system 1. When a switch SW1 is held closed, the photocurrent of the diode D1 is integrated by an integrator 2, and the output of the integrator 2 increases in a negative direction. When the output of the integrator 2 equals to a reference power source -Es, the output of a comparator 5 inverts, and a control circuit 7 turns the switch SW1 off. On the other hand, a switch SW2 also makes on-off action in synchronization with SW1, and while the switch SW2 is held closed, an integrator 3 integrates the photocurrents of the diode D2. The final output of this integrator 3 is held in a holding circuit 4, and an amplifier 6 sends a signal to a control circuit 9 so that the deviation between the output of the circuit 4 and the voltage -Es is made zero. Upon receiving this signal, the circuit 9 drives the radiator R. The output of the circuit 9 is converted 10 to the signal corresponding to temp. and is outputted.
JP55062595A 1980-05-12 1980-05-12 automatic brightness thermometer Expired JPS6058816B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55062595A JPS6058816B2 (en) 1980-05-12 1980-05-12 automatic brightness thermometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55062595A JPS6058816B2 (en) 1980-05-12 1980-05-12 automatic brightness thermometer

Publications (2)

Publication Number Publication Date
JPS56158924A true JPS56158924A (en) 1981-12-08
JPS6058816B2 JPS6058816B2 (en) 1985-12-21

Family

ID=13204826

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55062595A Expired JPS6058816B2 (en) 1980-05-12 1980-05-12 automatic brightness thermometer

Country Status (1)

Country Link
JP (1) JPS6058816B2 (en)

Also Published As

Publication number Publication date
JPS6058816B2 (en) 1985-12-21

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