JPS556240A - Digital tachometer - Google Patents
Digital tachometerInfo
- Publication number
- JPS556240A JPS556240A JP7843378A JP7843378A JPS556240A JP S556240 A JPS556240 A JP S556240A JP 7843378 A JP7843378 A JP 7843378A JP 7843378 A JP7843378 A JP 7843378A JP S556240 A JPS556240 A JP S556240A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pulses
- signals
- waveform shaping
- converted
- 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
Abstract
PURPOSE: To reliably eliminate the influences from disturbances in the converted output thereby to make it possible to accomplish the highly accurate measurements by subjecting the photo-electrically converted out to waveform shaping process.
CONSTITUTION: The light projected from a light source 1 is reflected by a rotary body to be measured so that one output PT is fed out of a waveform shaping circuit 3 from a photoelectrically converter 2 for each rotation. In the circuit 3, the signals PT are converted by a Schmidt circuit 21 into signals PM, by which are reset a plurality of FF 22 to be consecutively inverted by clock pulses CP so that waveform shaping pulses PS are generated from the circuit 3. The pulses PS are obtained irrespective of the disturbances in the signals PT. And, the pulses PS are transmitted at 4 and counted at 5 by the one second period control from a control circuit 11 so that the counted value is stored at 6 and indicated at 7. In this case, if the transmission number is set at 60, the revolutions of the rotary body per minute can be indicated.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7843378A JPS556240A (en) | 1978-06-28 | 1978-06-28 | Digital tachometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7843378A JPS556240A (en) | 1978-06-28 | 1978-06-28 | Digital tachometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS556240A true JPS556240A (en) | 1980-01-17 |
Family
ID=13661899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7843378A Pending JPS556240A (en) | 1978-06-28 | 1978-06-28 | Digital tachometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS556240A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5822283A (en) * | 1981-07-29 | 1983-02-09 | 株式会社日立製作所 | Detector for abnormality of elevator |
-
1978
- 1978-06-28 JP JP7843378A patent/JPS556240A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5822283A (en) * | 1981-07-29 | 1983-02-09 | 株式会社日立製作所 | Detector for abnormality of elevator |
JPS6341829B2 (en) * | 1981-07-29 | 1988-08-18 | Hitachi Ltd |
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