JPS556240A - Digital tachometer - Google Patents

Digital tachometer

Info

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
Application number
JP7843378A
Other languages
Japanese (ja)
Inventor
Taido Sugiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHINPO INDUSTRIAL CO Ltd
Shinpo Kogyo KK
Original Assignee
SHINPO INDUSTRIAL CO Ltd
Shinpo Kogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHINPO INDUSTRIAL CO Ltd, Shinpo Kogyo KK filed Critical SHINPO INDUSTRIAL CO Ltd
Priority to JP7843378A priority Critical patent/JPS556240A/en
Publication of JPS556240A publication Critical patent/JPS556240A/en
Pending legal-status Critical Current

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
JP7843378A 1978-06-28 1978-06-28 Digital tachometer Pending JPS556240A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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