JPS5633557A - Noncontact measuring method of speed - Google Patents
Noncontact measuring method of speedInfo
- Publication number
- JPS5633557A JPS5633557A JP10918779A JP10918779A JPS5633557A JP S5633557 A JPS5633557 A JP S5633557A JP 10918779 A JP10918779 A JP 10918779A JP 10918779 A JP10918779 A JP 10918779A JP S5633557 A JPS5633557 A JP S5633557A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- signals
- peak
- polarity correlation
- detectors
- 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 enable continuous measurement even when the change of speed is large by a method wherein the uneven signals of light from a moving surface are detected by means of two pairs of detectors, the polarity correlation of the signals is calculated, and control for catching the peak of the wave-form is conducted.
CONSTITUTION: Detectors 1a, 1b are arranged at locations where can detect the uneven signals of light from the moving surface at fixed interval, the output signals are provided to Schmidt circuits 4, a shift register 5, an EX-NOR circuit 6 and a CR low-pass filter 7, and polarity correlation is calculated. A microcomputer 10 takes in polarity correlation output, conducts processing necessary for the measurement of speed, and controls the pulse intervals of the shift register 5 while displaying speed to an annunciator 13. Thus, a peak is detected from a polarity correlation wave-form, speed can be obtained by conducting control for cathcing the peak, and the speed can continuously be measured even when the change of speed is large.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10918779A JPS5633557A (en) | 1979-08-29 | 1979-08-29 | Noncontact measuring method of speed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10918779A JPS5633557A (en) | 1979-08-29 | 1979-08-29 | Noncontact measuring method of speed |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5633557A true JPS5633557A (en) | 1981-04-04 |
Family
ID=14503836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10918779A Pending JPS5633557A (en) | 1979-08-29 | 1979-08-29 | Noncontact measuring method of speed |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5633557A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012112794A (en) * | 2010-11-25 | 2012-06-14 | Mitsubishi Electric Corp | Speed measuring device |
US9052392B2 (en) | 2010-11-25 | 2015-06-09 | Mitsubishi Electric Corporation | Velocity measurement apparatus capable of accurately measuring velocity of moving object relative to ground surface |
-
1979
- 1979-08-29 JP JP10918779A patent/JPS5633557A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012112794A (en) * | 2010-11-25 | 2012-06-14 | Mitsubishi Electric Corp | Speed measuring device |
US9052392B2 (en) | 2010-11-25 | 2015-06-09 | Mitsubishi Electric Corporation | Velocity measurement apparatus capable of accurately measuring velocity of moving object relative to ground surface |
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