CN207488352U - A kind of measuring bridge circuit - Google Patents
A kind of measuring bridge circuit Download PDFInfo
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- CN207488352U CN207488352U CN201721646206.7U CN201721646206U CN207488352U CN 207488352 U CN207488352 U CN 207488352U CN 201721646206 U CN201721646206 U CN 201721646206U CN 207488352 U CN207488352 U CN 207488352U
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- bridge circuit
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model is related to a kind of measuring bridge circuits, winding one, winding two, winding three, winding four and the winding five being wrapped in including iron core and successively on iron core, one or two exit of winding is connect respectively with testing capacitor, Hi-pot test power supply, the testing capacitor other end is connect by standard capacitance with two one end of winding, two other end of winding connection Hi-pot test power supply；The circuit that delay element, multiplier and admittance two are connected；Admittance one exports balanced balanced current two and accesses winding four, admittance two exports balanced balanced current and accesses winding three together, wherein winding five is zero-detection winding, it is in parallel with null detector, bridge balance state is shown for detecting, the influence of stray capacitance can be eliminated from principle, linearity error is smaller, and it is simple to form circuit.
Description
Technical field
The utility model is related to bridge circuit field, specifically a kind of measuring bridge circuit.
Background technology
Bridge circuit is a kind of instrument with the various amounts of comparative method for measuring (such as capacitance, voltage, inductance), and principle is handle
Tested metering device is put into a bridge arm, and adjustable reference impedance is put into another adjacent bridge arm, and two bridge arms are coupled with frequency
Rate is identical, in the identical signal source of voltage, adjusts reference impedance and causes bridge balancing, then the impedance being tested in bridge arm is hindered with reference
Anti- conjugation is equal, and common bridge circuit has common AC bridge, close coupling inductance arm electric bridge, transformer bridges, double-T shaped two pole
Pipe AC bridge etc., have the advantages that it is with high accuracy, but need using driving cable, it is impossible to from principle eliminate stray capacitance shadow
It rings, linearity error is larger, forms circuit complexity, driving frequency generally can not be more than 100KHz.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of measuring bridge circuit, to solve to deposit in the prior art
The defects of.
The technical solution that the utility model solves above-mentioned technical problem is as follows：
A kind of measuring bridge circuit, including iron core (1) and the winding one (11) being wrapped in successively on iron core (1), winding two
(12), winding three (13), winding four (14) and winding five (15), described one (11) two exit of winding respectively with testing capacitor
(7), Hi-pot test power supply (3) connects, and testing capacitor (7) other end is connect by standard capacitance (6) with winding two (12) one end,
Winding two (12) other end connection Hi-pot test power supply (3)；Current transformer (18) senses winding two (12) electric current and through electric current
Electric pressure converter (8) is converted into two-way input voltage, is respectively connected to multiplier (9) and the circuit of admittance one (16) series connection；Delay
The circuit of element (10), multiplier (9) and admittance two (17) series connection；Admittance one (16) output balanced balanced current two (5) and access around
Group four (14), admittance two (17) output balanced balanced current one (4) simultaneously access winding three (13), wherein winding five (15) for zero-detection around
Group, it is in parallel with null detector (2), show bridge balance state for detecting；
Further, the winding one (11), winding two (12), winding three (13), winding four (14) umber of turn is adjustable
Section；
Further, the testing capacitor (7) is parallel with resistance；
The beneficial effects of the utility model are：The influence of stray capacitance can be eliminated from principle, linearity error is smaller, forms
Circuit is simple, and reliability is high.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
In attached drawing, parts list represented by the reference numerals are as follows：
1st, iron core, 2, null detector, 3, Hi-pot test power supply, 4, balanced balanced current one, 5, balanced balanced current two, 6, standard capacitance,
7th, testing capacitor, 8, current-to-voltage convertor, 9, multiplier, 10, delay element, 11, winding one, 12, winding two, 13, winding
Three, 14, winding four, 15, winding five, 16, admittance one, 17, admittance two, 18, current transformer.
Specific embodiment
The principle and feature of the utility model are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
As shown in Figure 1, a kind of measuring bridge circuit, including iron core (1) and the winding one being wrapped in successively on iron core (1)
(11), winding two (12), winding three (13), winding four (14) and winding five (15), one (11) two exit of winding difference
It is connect with testing capacitor (7), Hi-pot test power supply (3), testing capacitor (7) other end passes through standard capacitance (6) and winding two
(12) one end connects, winding two (12) other end connection Hi-pot test power supply (3)；Current transformer (18) sensing winding two (12)
Electric current is simultaneously converted into two-way input voltage through current-to-voltage convertor (8), is respectively connected to multiplier (9) and admittance one (16) series connection
Circuit；The circuit of delay element (10), multiplier (9) and admittance two (17) series connection；Admittance one (16) exports balanced balanced current two
(5) and winding four (14) is accessed, admittance two (17) output balanced balanced current one (4) simultaneously accesses winding three (13), wherein winding five
(15) it is zero-detection winding, it is in parallel with null detector (2), show bridge balance state for detecting；
Further, the winding one (11), winding two (12), winding three (13), winding four (14) umber of turn is adjustable
Section；
Further, the testing capacitor (7) is parallel with resistance；
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (3)
1. a kind of measuring bridge circuit, it is characterised in that：Including iron core (1) and the winding one being wrapped in successively on iron core (1)
(11), winding two (12), winding three (13), winding four (14) and winding five (15), one (11) two exit of winding difference
It is connect with testing capacitor (7), Hi-pot test power supply (3), testing capacitor (7) other end passes through standard capacitance (6) and winding two
(12) one end connects, winding two (12) other end connection Hi-pot test power supply (3)；Current transformer (18) sensing winding two (12)
Electric current is simultaneously converted into two-way input voltage through current-to-voltage convertor (8), is respectively connected to multiplier (9) and admittance one (16) series connection
Circuit；The circuit of delay element (10), multiplier (9) and admittance two (17) series connection；Admittance one (16) exports balanced balanced current two
(5) and winding four (14) is accessed, admittance two (17) output balanced balanced current one (4) simultaneously accesses winding three (13), wherein winding five
(15) it is zero-detection winding, it is in parallel with null detector (2), show bridge balance state for detecting.
2. a kind of measuring bridge circuit according to claim 1, it is characterised in that：The winding one (11), winding two
(12), winding three (13), winding four (14) umber of turn are adjusted.
3. a kind of measuring bridge circuit according to claim 1, it is characterised in that：The testing capacitor (7) is parallel with electricity
Resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721646206.7U CN207488352U (en) | 2017-12-01 | 2017-12-01 | A kind of measuring bridge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721646206.7U CN207488352U (en) | 2017-12-01 | 2017-12-01 | A kind of measuring bridge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207488352U true CN207488352U (en) | 2018-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721646206.7U Active CN207488352U (en) | 2017-12-01 | 2017-12-01 | A kind of measuring bridge circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207488352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900944A (en) * | 2019-04-08 | 2019-06-18 | 申积良 | Intelligent AC electric bridge and electrical equipment, insulating materials alternating-current parameter measurement method |
-
2017
- 2017-12-01 CN CN201721646206.7U patent/CN207488352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900944A (en) * | 2019-04-08 | 2019-06-18 | 申积良 | Intelligent AC electric bridge and electrical equipment, insulating materials alternating-current parameter measurement method |
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