GB1068917A - Impedance-measuring apparatus - Google Patents
Impedance-measuring apparatusInfo
- Publication number
- GB1068917A GB1068917A GB324165A GB324165A GB1068917A GB 1068917 A GB1068917 A GB 1068917A GB 324165 A GB324165 A GB 324165A GB 324165 A GB324165 A GB 324165A GB 1068917 A GB1068917 A GB 1068917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- impedance
- impedances
- bridge
- ratio
- 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
- G01R27/08—Measuring resistance by measuring both voltage and current
- G01R27/10—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient
- G01R27/12—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient using hand generators, e.g. meggers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
1,068,917. Impedance measuring apparatus. INTERNATIONAL RESEARCH & DEVELOPMENT CO. Ltd. Jan. is, 1966 [Jan. 25, 1965], No. 3241/65. Heading G1U. In an apparatus for measuring the ratio of two impedances, the impedances 1, 2 are connected in two arms of a bridge circuit, of which one of the other arms includes a current sensitive resistor 6, e.g. a thermistor or varistor, and the other a comparison resistor 7. The output of the bridge 10, 11 is connected via a tuned circuit 12 and an amplifier 5 to the bridge input 3, 4 the arrangement being such that for any given ratio of the impedances 1, 2 a stable oscillatory condition is reached in which the current through the resistor 6 is such as to produce a nearly balanced condition of the bridge. The impedance ratio is then indicated as a function of the amplifier output voltage by a meter 15. As described with reference to Fig. 1, the impedance 2 is fixed, and impedance 1 variable. In a modification Fig. 2 (not shown) the two impedances are both variable and comprise a pair of inductances (16, 17) mutually coupled to a movable coil (18) to form a strain gauge. When resistor 6 is a temperature sensitive resistor, resistor 7 may also include a temperature sensitive element to provide compensation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB324165A GB1068917A (en) | 1965-01-25 | 1965-01-25 | Impedance-measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB324165A GB1068917A (en) | 1965-01-25 | 1965-01-25 | Impedance-measuring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1068917A true GB1068917A (en) | 1967-05-17 |
Family
ID=9754618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB324165A Expired GB1068917A (en) | 1965-01-25 | 1965-01-25 | Impedance-measuring apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1068917A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4190796A (en) * | 1977-06-02 | 1980-02-26 | Tokyo Shibaura Electric Company, Limited | Pressure detecting apparatus having linear output characteristic |
-
1965
- 1965-01-25 GB GB324165A patent/GB1068917A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4190796A (en) * | 1977-06-02 | 1980-02-26 | Tokyo Shibaura Electric Company, Limited | Pressure detecting apparatus having linear output characteristic |
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