JPS552933A - Digital electronic length measuring instrument - Google Patents

Digital electronic length measuring instrument

Info

Publication number
JPS552933A
JPS552933A JP7572878A JP7572878A JPS552933A JP S552933 A JPS552933 A JP S552933A JP 7572878 A JP7572878 A JP 7572878A JP 7572878 A JP7572878 A JP 7572878A JP S552933 A JPS552933 A JP S552933A
Authority
JP
Japan
Prior art keywords
scale
speed
photo
output
feeding
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
JP7572878A
Other languages
Japanese (ja)
Inventor
Sadayuki Matsumiya
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.)
Mitsutoyo Manufacturing Co Ltd
Original Assignee
Mitsutoyo Manufacturing Co Ltd
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 Mitsutoyo Manufacturing Co Ltd filed Critical Mitsutoyo Manufacturing Co Ltd
Priority to JP7572878A priority Critical patent/JPS552933A/en
Publication of JPS552933A publication Critical patent/JPS552933A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to monitor at all times the speed of scale feeding with a simple structure, by detecting electrically, without contact, the amount of scale shift corresponding to the length of an object to be measured by means of a photo- electric detector, and detecting the speed of scale feeding by using its detection signal.
CONSTITUTION: Up signal 100 and down signal 102 are input to inverted OR gate 20 with respect to the directions of movement, A and B, of a scale shift detector provided with light generator 14 and light receiver 16 on both sides of index scale 12 and main scale 10. Its output 104 is supplied to the trigger terminal of one-shot circuit 22 which forms a reference value generating circuit, and reference pulse 106 is output. Outputs 104 and 106 are supplied to NAND gate 24 of a comparator circuit. Next, the output of NAND gate 24 is given to an excess signal generator circuit consisting of flip-flop 26, resistor 28, transistor 30, photo-diode 32 and resistor 34. When the period of the scale shift detection signal becomes shorter than the reference value of feeding speed, photo-diode 32 emits light and gives an excess speed alarm.
COPYRIGHT: (C)1980,JPO&Japio
JP7572878A 1978-06-21 1978-06-21 Digital electronic length measuring instrument Pending JPS552933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7572878A JPS552933A (en) 1978-06-21 1978-06-21 Digital electronic length measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7572878A JPS552933A (en) 1978-06-21 1978-06-21 Digital electronic length measuring instrument

Publications (1)

Publication Number Publication Date
JPS552933A true JPS552933A (en) 1980-01-10

Family

ID=13584612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7572878A Pending JPS552933A (en) 1978-06-21 1978-06-21 Digital electronic length measuring instrument

Country Status (1)

Country Link
JP (1) JPS552933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016008903A (en) * 2014-06-25 2016-01-18 日本電波株式会社 Digital scale display control device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914177A (en) * 1972-05-16 1974-02-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4914177A (en) * 1972-05-16 1974-02-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016008903A (en) * 2014-06-25 2016-01-18 日本電波株式会社 Digital scale display control device

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