JPS57106885A - Radiant rays measuring device - Google Patents

Radiant rays measuring device

Info

Publication number
JPS57106885A
JPS57106885A JP18186080A JP18186080A JPS57106885A JP S57106885 A JPS57106885 A JP S57106885A JP 18186080 A JP18186080 A JP 18186080A JP 18186080 A JP18186080 A JP 18186080A JP S57106885 A JPS57106885 A JP S57106885A
Authority
JP
Japan
Prior art keywords
converted
radiant rays
converting
logarithm
logarithmically
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
JP18186080A
Other languages
Japanese (ja)
Inventor
Yoshitaka Takeuchi
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP18186080A priority Critical patent/JPS57106885A/en
Publication of JPS57106885A publication Critical patent/JPS57106885A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/185—Measuring radiation intensity with ionisation chamber arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

PURPOSE:To omit switching of the range and improve the measuring accuracy over the wide range by converting logarithmically and amplifying the microelectric signal corresponding to the quantity of radiant rays, finding an antilogarithm from the logarithm and then converting it into reciprocal logarithm. CONSTITUTION:Microcurrent output from an ionized layer used as a radiant rays detector is converted logarithmically and amplified by a logarithmic amplifier 22. The DC voltage output from the logarithmic amplifier 22 is temperature compensated by a temperature compensation circuit 23 and converted into a BCD digital signal by an A/D converter 24. The BCD signal is supplied to a reciprocal logarithm converting circuit 25 with read-only memory and converted into a linear signal corresponding to the input microcurrent and suitable for display and storage.
JP18186080A 1980-12-24 1980-12-24 Radiant rays measuring device Pending JPS57106885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18186080A JPS57106885A (en) 1980-12-24 1980-12-24 Radiant rays measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18186080A JPS57106885A (en) 1980-12-24 1980-12-24 Radiant rays measuring device

Publications (1)

Publication Number Publication Date
JPS57106885A true JPS57106885A (en) 1982-07-02

Family

ID=16108094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18186080A Pending JPS57106885A (en) 1980-12-24 1980-12-24 Radiant rays measuring device

Country Status (1)

Country Link
JP (1) JPS57106885A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002277593A (en) * 2001-03-21 2002-09-25 Konica Corp Logarithmic transformation circuit and radiographic image reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002277593A (en) * 2001-03-21 2002-09-25 Konica Corp Logarithmic transformation circuit and radiographic image reader

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