JPS5473522A - Information reading device - Google Patents
Information reading deviceInfo
- Publication number
- JPS5473522A JPS5473522A JP14089677A JP14089677A JPS5473522A JP S5473522 A JPS5473522 A JP S5473522A JP 14089677 A JP14089677 A JP 14089677A JP 14089677 A JP14089677 A JP 14089677A JP S5473522 A JPS5473522 A JP S5473522A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- deflecting
- saw
- tooth waveform
- angle
- 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 simplify the circuit constitution by providing a single-turn deflecting coil to the pickup tube which reads out the tag card and then varying the scanning direction to secure the readable state of the tag card through the rotary adjustment of the deflecting angle for the deflecting coil.
CONSTITUTION: Single-turn deflecting coil 1, using two units of the deflecting coil featuring the same impendance, is used. With supply of the saw-tooth waveform voltage to input terminal 2 of the constant current driving circuit, the current flowing to coil 1 is fed back to differential amplifier 4 by the function resistance 3, and accordingly the current of the saw-tooth waveform proportional to the input voltage flows to coil 1. In such way, the current flowing to coil 1 is changed to the saw-tooth waveform, so the polarity switching becomes easy when the deflecting angle is changed to an optional angle. And no transient is caused through switching.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14089677A JPS5473522A (en) | 1977-11-24 | 1977-11-24 | Information reading device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14089677A JPS5473522A (en) | 1977-11-24 | 1977-11-24 | Information reading device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5473522A true JPS5473522A (en) | 1979-06-12 |
Family
ID=15279303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14089677A Pending JPS5473522A (en) | 1977-11-24 | 1977-11-24 | Information reading device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5473522A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111002990A (en) * | 2019-12-05 | 2020-04-14 | 华南理工大学 | Lane departure early warning method and system based on dynamic departure threshold |
-
1977
- 1977-11-24 JP JP14089677A patent/JPS5473522A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111002990A (en) * | 2019-12-05 | 2020-04-14 | 华南理工大学 | Lane departure early warning method and system based on dynamic departure threshold |
CN111002990B (en) * | 2019-12-05 | 2021-06-08 | 华南理工大学 | Lane departure early warning method and system based on dynamic departure threshold |
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