GB875869A - Improvements relating to measuring circuits - Google Patents
Improvements relating to measuring circuitsInfo
- Publication number
- GB875869A GB875869A GB13257/59A GB1325759A GB875869A GB 875869 A GB875869 A GB 875869A GB 13257/59 A GB13257/59 A GB 13257/59A GB 1325759 A GB1325759 A GB 1325759A GB 875869 A GB875869 A GB 875869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- phase
- capacitance
- resultant
- reactive component
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
875,869. Impedance measurements. NEDERLANDSE ORGANISATIE VOOR TOEGEPAST - NATUURWETEN - SCHAPPELIJK ONDERZOEK TEN BEHOEVE VAN NIJVERHEID, HANDEL EN VERKEER. April 17, 1959 [April 24, 1958], No. 13257/59. Class 37. Capacitance or inductance is measured in a circuit in which the reactive component of the current flowing in a series resonant circuit is measured by means of a synchronous detector. The reactive component of the current falls rapidly to zero as resonance is approached, in contrast to the slowly varying resultant current. A circuit described for measuring an unknown capacitance C1 comprises series resonant circuit L1, C1 connected across a cable K having a self capacitance C2, and a source E having a frequency variable between 0.5 and 2.0 Mc/s. Capacitor C3 compensates for the current flowing through C2. The voltage U3 developed across C4 is displaced in phase by 90 degrees from the current in L1, C1 and has a component due to the reactive current in L1, C1 which is either in phase or in anti-phase with voltages U1, U1<SP>1> across the centre-tapped secondary winding of transformer T2. The resultant sum and difference voltages E1 and E2 of U3 and U1 and U1<SP>1> are amplified, rectified and subtracted, the resultant voltage being proportional only to the reactive component of the current in L1, C1 and being zero at resonance.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL875869X | 1958-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB875869A true GB875869A (en) | 1961-08-23 |
Family
ID=19851384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13257/59A Expired GB875869A (en) | 1958-04-24 | 1959-04-17 | Improvements relating to measuring circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB875869A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602711A (en) * | 1992-01-03 | 1997-02-11 | British Nuclear Fuels Plc | Apparatus for monitoring inductance |
| CZ304501B6 (en) * | 2013-06-21 | 2014-05-28 | Jaroslav Plocek | Load tester of power capacitors |
-
1959
- 1959-04-17 GB GB13257/59A patent/GB875869A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602711A (en) * | 1992-01-03 | 1997-02-11 | British Nuclear Fuels Plc | Apparatus for monitoring inductance |
| CZ304501B6 (en) * | 2013-06-21 | 2014-05-28 | Jaroslav Plocek | Load tester of power capacitors |
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