JPS5655866A - Detecting method for equilibrium point of bridge circuit - Google Patents
Detecting method for equilibrium point of bridge circuitInfo
- Publication number
- JPS5655866A JPS5655866A JP13151679A JP13151679A JPS5655866A JP S5655866 A JPS5655866 A JP S5655866A JP 13151679 A JP13151679 A JP 13151679A JP 13151679 A JP13151679 A JP 13151679A JP S5655866 A JPS5655866 A JP S5655866A
- Authority
- JP
- Japan
- Prior art keywords
- measurement
- power source
- bridge circuit
- equilibrium point
- infralow
- 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
- 238000005259 measurement Methods 0.000 abstract 5
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 230000003292 diminished effect Effects 0.000 abstract 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE: To reduce errors in measurement and make the operation safe by performing detection of the equilibrium point of a Schering bridge circuit having an infralow-frequency power source as a power source through the intermediary of a photocoupling element.
CONSTITUTION: The electrostatic capacitance of a test specimen such as a power cable is determined as Cx and this forms the Schering bridge circuit together with a standard capacitor Cs, a variable resistance R3 and a variable capacitance C4, whereby the electrostatic tangential measurement is performed. On this occasion, the infralow-frequency power source of about 0.1Hz is used as the power source 3, while the photocoupling element 2 such as a photocoupler is connected to the 1st step of a equilibrium point detecting part 1 and the output thereof is supplied to a recorder 5 through the intermediary of a detector 4. Accordingly, the floating capacitance between the detecting part of the infralow-frequency bridge and the earth is reduced and thereby the errors in measurement can be diminished, while the fluctuation in measurement is eliminated and thus the measurement can be conducted safely since the detecting part is employed with grounding.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13151679A JPS5655866A (en) | 1979-10-12 | 1979-10-12 | Detecting method for equilibrium point of bridge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13151679A JPS5655866A (en) | 1979-10-12 | 1979-10-12 | Detecting method for equilibrium point of bridge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5655866A true JPS5655866A (en) | 1981-05-16 |
Family
ID=15059863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13151679A Pending JPS5655866A (en) | 1979-10-12 | 1979-10-12 | Detecting method for equilibrium point of bridge circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5655866A (en) |
-
1979
- 1979-10-12 JP JP13151679A patent/JPS5655866A/en active Pending
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