JPS5495269A - Non-contact length measuring apparatus - Google Patents
Non-contact length measuring apparatusInfo
- Publication number
- JPS5495269A JPS5495269A JP178578A JP178578A JPS5495269A JP S5495269 A JPS5495269 A JP S5495269A JP 178578 A JP178578 A JP 178578A JP 178578 A JP178578 A JP 178578A JP S5495269 A JPS5495269 A JP S5495269A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- length
- pulses
- granular
- 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.)
- Pending
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE: To improve measurement accuracy by radiating laser beam to the surface of steel material under production and measuring the length of the steel material in the absence of contact by the use of diffration effect.
CONSTITUTION: When a steel material 3 is radiated with a laser light source 1, viewing the laser rays reflected from the surface of the steel material 3 from observation plane 4 lets the diffracted image 5 assuming granular fringe patterns be seen. The apparatus utilizes this diffraction image 5, wherein as the steel material 3 moves the granular spots 5' move and the light passing through a slit 6 is made to pulse-form signal by a photo detector 7. This signal is amplified and pulses are generated in correspondence to the signals exceeding a fixed voltage by a comparator 9. The number of said pulses is counted with a counter 10. The count value thereof is proportional to the length of the steel material 3 having passed the radiation point and therefore it is converted with a length conversion circuit 11 and the length is displayed in a display device 13.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP178578A JPS5495269A (en) | 1978-01-11 | 1978-01-11 | Non-contact length measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP178578A JPS5495269A (en) | 1978-01-11 | 1978-01-11 | Non-contact length measuring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5495269A true JPS5495269A (en) | 1979-07-27 |
Family
ID=11511220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP178578A Pending JPS5495269A (en) | 1978-01-11 | 1978-01-11 | Non-contact length measuring apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5495269A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016075650A (en) * | 2014-10-09 | 2016-05-12 | 株式会社フジエンジニアリング | Surface cleanness determination device and surface cleanness determination program |
-
1978
- 1978-01-11 JP JP178578A patent/JPS5495269A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016075650A (en) * | 2014-10-09 | 2016-05-12 | 株式会社フジエンジニアリング | Surface cleanness determination device and surface cleanness determination program |
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