JPS54128760A - Thickness matering method using radioactive rays - Google Patents

Thickness matering method using radioactive rays

Info

Publication number
JPS54128760A
JPS54128760A JP3610678A JP3610678A JPS54128760A JP S54128760 A JPS54128760 A JP S54128760A JP 3610678 A JP3610678 A JP 3610678A JP 3610678 A JP3610678 A JP 3610678A JP S54128760 A JPS54128760 A JP S54128760A
Authority
JP
Japan
Prior art keywords
thickness
article
amplifier
value
detector
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
JP3610678A
Other languages
Japanese (ja)
Inventor
Kazunori Masanobu
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3610678A priority Critical patent/JPS54128760A/en
Publication of JPS54128760A publication Critical patent/JPS54128760A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

PURPOSE: To meter the thickness of an article at a high accuracy, while reducing the adjustment, by interchanging resistors in accordance with the thickness of the article to compare a reference value, which is given in advance with the use of a reference member, when it is intended to change the metering range, so that the gain compensation is performed with the difference is larger than the allowable range.
CONSTITUTION: A feedback resistor 36a to be used for metering a thin article is connected in parallel with an operational amplifier 34 through a change-over device 35 and is adjusted such that the output of the amplifier 34 becomes the maximum under the condition having no article to be metered. A reference member 45 having a known thickness is interposed between a radioactive ray source 30 and a detector 32 so that the reference value is stored in a constant presetter 41. A resistor 36b takes the part of the resistor 36a, and the reference member 45 is also interposed between the source 30 and the detector 32 so that the thickness of the plate is detected by means of an operational amplifier 38. The difference is deduced between the value thus obtained and the value stored in the presetter 41, and the gain value is compensated, when the difference is larger than the allowable range, and is stored in the amplifier 38. When the article 35 is carried between the source 30 and the detector 32, the resistors 36a and 36b are selectively connected by the amplifier 38 in accordance with the thickness so that the resultant thickness is displayed in a meter 44.
COPYRIGHT: (C)1979,JPO&Japio
JP3610678A 1978-03-30 1978-03-30 Thickness matering method using radioactive rays Pending JPS54128760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3610678A JPS54128760A (en) 1978-03-30 1978-03-30 Thickness matering method using radioactive rays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3610678A JPS54128760A (en) 1978-03-30 1978-03-30 Thickness matering method using radioactive rays

Publications (1)

Publication Number Publication Date
JPS54128760A true JPS54128760A (en) 1979-10-05

Family

ID=12460513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3610678A Pending JPS54128760A (en) 1978-03-30 1978-03-30 Thickness matering method using radioactive rays

Country Status (1)

Country Link
JP (1) JPS54128760A (en)

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