JPS5619456A - Ball speed detector - Google Patents
Ball speed detectorInfo
- Publication number
- JPS5619456A JPS5619456A JP9651379A JP9651379A JPS5619456A JP S5619456 A JPS5619456 A JP S5619456A JP 9651379 A JP9651379 A JP 9651379A JP 9651379 A JP9651379 A JP 9651379A JP S5619456 A JPS5619456 A JP S5619456A
- Authority
- JP
- Japan
- Prior art keywords
- ball
- speed
- sensor
- width
- base board
- 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 By Optical Means (AREA)
Abstract
PURPOSE: To miniaturize the unit, to raduce its cost and to improve measurement precision by catching a ball in the act of moving by linear image sensors arranged on the top and side of a base board and then by detecting the speed of the ball by fixed arithmetic.
CONSTITUTION: On the top and side of base board 3, linear image sensors 1 and 2 are arranged. In front of sensors 1 and 2, lenses 7 and 8 and illumination light sources L1 and L2 are provided. By way of waveform shaping circuit 12, the output of sensor 2 is led to time measuring circuit 18 to find time T when formed image 32 of a ball passes through width (a) of photosense part 31. The output is input to speed arithmetic circuit 19 and contraction factor (m) of the formed image of the ball is found by a constant stored together with data (x) representing a ball position from sensor 1. Then, the above-mentioned time T and width (a) are used to calculate ball speed V=ma/T. Consequently, the speed can be detected with accuracy since the x-axial change of the ball is corrected.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9651379A JPS6013469B2 (en) | 1979-07-27 | 1979-07-27 | Ball speed detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9651379A JPS6013469B2 (en) | 1979-07-27 | 1979-07-27 | Ball speed detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5619456A true JPS5619456A (en) | 1981-02-24 |
JPS6013469B2 JPS6013469B2 (en) | 1985-04-08 |
Family
ID=14167204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9651379A Expired JPS6013469B2 (en) | 1979-07-27 | 1979-07-27 | Ball speed detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6013469B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0271106A (en) * | 1988-09-07 | 1990-03-09 | Kokusai Electric Co Ltd | Apparatus for detecting passing position of flight body |
JPH0861090A (en) * | 1994-08-10 | 1996-03-05 | Kawasaki Heavy Ind Ltd | Intake air cooling method and device of combustion turbine |
-
1979
- 1979-07-27 JP JP9651379A patent/JPS6013469B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0271106A (en) * | 1988-09-07 | 1990-03-09 | Kokusai Electric Co Ltd | Apparatus for detecting passing position of flight body |
JPH0861090A (en) * | 1994-08-10 | 1996-03-05 | Kawasaki Heavy Ind Ltd | Intake air cooling method and device of combustion turbine |
Also Published As
Publication number | Publication date |
---|---|
JPS6013469B2 (en) | 1985-04-08 |
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