JPS5518944A - Digital type rotational angle detector of high accuracy with reduced number of marks - Google Patents
Digital type rotational angle detector of high accuracy with reduced number of marksInfo
- Publication number
- JPS5518944A JPS5518944A JP9171378A JP9171378A JPS5518944A JP S5518944 A JPS5518944 A JP S5518944A JP 9171378 A JP9171378 A JP 9171378A JP 9171378 A JP9171378 A JP 9171378A JP S5518944 A JPS5518944 A JP S5518944A
- Authority
- JP
- Japan
- Prior art keywords
- pulses
- counter
- time period
- marks
- reduced number
- 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 ensure high accuracy with a reduced number of marks by measuring and storing the time period, for which a mark angle is passed, and by reproducing the time interval stored until the subsequent mark arrives thereby to generate and use the pulses for the angular pulses of the required accuracy.
CONSTITUTION: The pulse signals dueing the slit angle passing time period of a rotating disc 2 generated by an optical sensor 4 are fed through a waveform shaping circuit 15 to an AND gate 18. Rising and breaking pulses are detected by detecting circuits 16 and 17 so that the time period for which the mark angle of the disc 2 is passed at the rotating speed at that time is measured and stored in an U/D counter 20. Immediately after the storing operations are finished, a flip-flop 23 is turned on by a delay circuit 22 to start the subtracting operation of the counter 20. At the instant when the counter 20 takes a zero value, zero pulses are generated by a zero detecting circuit 26. Then, those pulses can be used as the angular pulses of the required accuracy.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9171378A JPS5518944A (en) | 1978-07-27 | 1978-07-27 | Digital type rotational angle detector of high accuracy with reduced number of marks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9171378A JPS5518944A (en) | 1978-07-27 | 1978-07-27 | Digital type rotational angle detector of high accuracy with reduced number of marks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5518944A true JPS5518944A (en) | 1980-02-09 |
Family
ID=14034144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9171378A Pending JPS5518944A (en) | 1978-07-27 | 1978-07-27 | Digital type rotational angle detector of high accuracy with reduced number of marks |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5518944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2670005A1 (en) * | 1990-11-29 | 1992-06-05 | Amr Plus Partners | Sensor for detecting the rotation of a disc of a meter |
-
1978
- 1978-07-27 JP JP9171378A patent/JPS5518944A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2670005A1 (en) * | 1990-11-29 | 1992-06-05 | Amr Plus Partners | Sensor for detecting the rotation of a disc of a meter |
| US5410246A (en) * | 1990-11-29 | 1995-04-25 | Amrplus Partners | Method for detection of a marked element in proximity to a sensor |
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