JPS5529722A - Current measuring unit - Google Patents
Current measuring unitInfo
- Publication number
- JPS5529722A JPS5529722A JP10202478A JP10202478A JPS5529722A JP S5529722 A JPS5529722 A JP S5529722A JP 10202478 A JP10202478 A JP 10202478A JP 10202478 A JP10202478 A JP 10202478A JP S5529722 A JPS5529722 A JP S5529722A
- Authority
- JP
- Japan
- Prior art keywords
- transducer
- bias
- current
- voltage
- low
- 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.)
- Granted
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To make it possible to detect a range from a minute current to a large current with a high precision and a good response by a comparatively low-cost transducer, by applying a bias to current detection signals and sending them from the high-voltage side and correcting bias components in the low-voltage side.
CONSTITUTION: Current transformer 6 is arranged on bus 1, and the output of current transformer 6 has the voltage waveform converted by current-voltage transducer 7 and is biased by DC bias circuit 8 and is converted to pulse frequency signals by voltage-frequency (V/F) transducer 9. Output pulses of V/F transducer 9 are transmitted to the low-voltage side through optical transmission circuit 10. Pulse frequency signals transmitted to the low-voltage side are converted to analogue signals by F/V transducer 11. In this case, a DC bias corresponding to bias components given by bias circuit 8 is subtracted.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10202478A JPS5529722A (en) | 1978-08-22 | 1978-08-22 | Current measuring unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10202478A JPS5529722A (en) | 1978-08-22 | 1978-08-22 | Current measuring unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5529722A true JPS5529722A (en) | 1980-03-03 |
JPS6253788B2 JPS6253788B2 (en) | 1987-11-12 |
Family
ID=14316173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10202478A Granted JPS5529722A (en) | 1978-08-22 | 1978-08-22 | Current measuring unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5529722A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01141365A (en) * | 1987-11-27 | 1989-06-02 | Sumitomo Electric Ind Ltd | Waveform observing device using optical fiber |
US5500663A (en) * | 1992-02-24 | 1996-03-19 | Canon Kabushiki Kaisha | Recording ink container with an air vent valve |
-
1978
- 1978-08-22 JP JP10202478A patent/JPS5529722A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01141365A (en) * | 1987-11-27 | 1989-06-02 | Sumitomo Electric Ind Ltd | Waveform observing device using optical fiber |
US5500663A (en) * | 1992-02-24 | 1996-03-19 | Canon Kabushiki Kaisha | Recording ink container with an air vent valve |
Also Published As
Publication number | Publication date |
---|---|
JPS6253788B2 (en) | 1987-11-12 |
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