JPS5540939A - Impedance measuring unit - Google Patents
Impedance measuring unitInfo
- Publication number
- JPS5540939A JPS5540939A JP11388378A JP11388378A JPS5540939A JP S5540939 A JPS5540939 A JP S5540939A JP 11388378 A JP11388378 A JP 11388378A JP 11388378 A JP11388378 A JP 11388378A JP S5540939 A JPS5540939 A JP S5540939A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- measurement
- fed
- flowing
- cycle
- 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
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To measure the impedance in short time and with high accuracy with live line condition, by flowing the current for one cycle to the measured impedance when the peak value of positive and negative is in agreement.
CONSTITUTION: Since the synchronous control circuit 3 produces the application signal which closes the switching circuit 2 for a given period by shifting the phase by taking the phase of power supply as reference, the circuit 2 is connected to the power supply by one cycle, the voltage is fed to the peak hold circuit 4 and the current is fed to the resistor R1 or R2 via the selection switch 5 to detect it at the shunt 6. This is fed to the peak hold circuits 8, 9 of positive and negative via the amplifying circuit 7, and the discrimination circuit 10 feeds the measurement instruction signal to the operation circuit 11 to display the possibility of measurement when the peak values at the both sides are equal, and the measurement circuit 13 is operated. The currents I1 and I2 flowing to the resistors R1 and R2 and the voltages V1 and V2 at that time are inputted to the operation unit 14. The result of operation is digitally displayed on the display circuit 15. Accordingly, the measurement at live line condition is possible.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11388378A JPS5540939A (en) | 1978-09-15 | 1978-09-15 | Impedance measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11388378A JPS5540939A (en) | 1978-09-15 | 1978-09-15 | Impedance measuring unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5540939A true JPS5540939A (en) | 1980-03-22 |
Family
ID=14623503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11388378A Pending JPS5540939A (en) | 1978-09-15 | 1978-09-15 | Impedance measuring unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5540939A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56101562A (en) * | 1980-01-18 | 1981-08-14 | Japanese National Railways<Jnr> | Insulation resistance measuring method and device thereof of dc electric circuit in use |
| JPS5748464U (en) * | 1980-09-05 | 1982-03-18 | ||
| JPS6185019A (en) * | 1984-09-28 | 1986-04-30 | 株式会社 高見沢サイバネテイツクス | Regulation detecting load appliance |
| JPS61266967A (en) * | 1985-05-22 | 1986-11-26 | Tohoku Electric Power Co Inc | Automatic monitoring device for ground constant of power distribution system |
| JPH03132947A (en) * | 1989-10-17 | 1991-06-06 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
-
1978
- 1978-09-15 JP JP11388378A patent/JPS5540939A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56101562A (en) * | 1980-01-18 | 1981-08-14 | Japanese National Railways<Jnr> | Insulation resistance measuring method and device thereof of dc electric circuit in use |
| JPS5748464U (en) * | 1980-09-05 | 1982-03-18 | ||
| JPH0125332Y2 (en) * | 1980-09-05 | 1989-07-28 | ||
| JPS6185019A (en) * | 1984-09-28 | 1986-04-30 | 株式会社 高見沢サイバネテイツクス | Regulation detecting load appliance |
| JPS61266967A (en) * | 1985-05-22 | 1986-11-26 | Tohoku Electric Power Co Inc | Automatic monitoring device for ground constant of power distribution system |
| JPH03132947A (en) * | 1989-10-17 | 1991-06-06 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
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