JPS552933A - Digital electronic length measuring instrument - Google Patents
Digital electronic length measuring instrumentInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4914177A (en) * | 1972-05-16 | 1974-02-07 |
-
1978
- 1978-06-21 JP JP7572878A patent/JPS552933A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4914177A (en) * | 1972-05-16 | 1974-02-07 |
Cited By (1)
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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