JPS5697815A - Radiation thickness gauge - Google Patents
Radiation thickness gaugeInfo
- Publication number
- JPS5697815A JPS5697815A JP17265479A JP17265479A JPS5697815A JP S5697815 A JPS5697815 A JP S5697815A JP 17265479 A JP17265479 A JP 17265479A JP 17265479 A JP17265479 A JP 17265479A JP S5697815 A JPS5697815 A JP S5697815A
- Authority
- JP
- Japan
- Prior art keywords
- output
- voltage
- comparator
- inputted
- comparison
- 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
Links
Landscapes
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
PURPOSE: To measure the absolute value of accurate thickness by counting the time when a voltage starting with the output voltage of a comparison system and damping according to an exponential function as time passes becomes equal to the output voltage of a measurement system.
CONSTITUTION: The measurement system and comparison system consisting of radiation sources 1 and 1a, body 2 to be measured, and detectors 3 and 3a respectively are arranged in the same atmosphere. So that the output of comparator 17 is zero, zero points of preamplifiers 4 and 4a and the measurement and comparison systems are previously corrected through electronic switches 31 and 31a, and 19 and 27, and controllers 26 and 16 and correction amounts are stored in correcting devices 25 and 26. The output of the measurement system when sample 2 is inserted is inputted to comparator 20. The output of the comparison system, on the other hand, is inputted to function generator 21, and the voltage that starts with a voltage value equal to that of the output voltage and damps according to an exponential function determined by CR of the circuit is inputted to comparator 20. The time when both the input voltages become equal to each other is counted by counter 22 via pulse generator 23 and AND gate 22 and the digital value of the accurate thickness is displayed on display device 23.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17265479A JPS5697815A (en) | 1979-12-31 | 1979-12-31 | Radiation thickness gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17265479A JPS5697815A (en) | 1979-12-31 | 1979-12-31 | Radiation thickness gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5697815A true JPS5697815A (en) | 1981-08-06 |
| JPS6111363B2 JPS6111363B2 (en) | 1986-04-02 |
Family
ID=15945895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17265479A Granted JPS5697815A (en) | 1979-12-31 | 1979-12-31 | Radiation thickness gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5697815A (en) |
-
1979
- 1979-12-31 JP JP17265479A patent/JPS5697815A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6111363B2 (en) | 1986-04-02 |
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