CN201145720Y - Apparatus for measuring inductance coil polarity - Google Patents
Apparatus for measuring inductance coil polarity Download PDFInfo
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- CN201145720Y CN201145720Y CNU2007201967031U CN200720196703U CN201145720Y CN 201145720 Y CN201145720 Y CN 201145720Y CN U2007201967031 U CNU2007201967031 U CN U2007201967031U CN 200720196703 U CN200720196703 U CN 200720196703U CN 201145720 Y CN201145720 Y CN 201145720Y
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Abstract
The utility model is applicable to the electric element measurement field and provides an inductance coil polarity measuring device, comprising an inductance coil, a polarity judging circuit, a separating circuit, a retaining circuit and a display device, wherein, the inductance coil comprises a coil to be tested with a fixed magnetic field and an induction coil; the polarity judging circuit receives induction voltage outputted by the induction coil; according to an induction voltage signal outputted by the polarity judging circuit, the separating circuit performs the separation; the retaining circuit retains the instantaneous induction voltage signal which is separated by the separating circuit; and the display device displays the induction voltage signal outputted by the retaining circuit. The inductance coil polarity measuring device adopts an electric circuit to realize the polarity test of the induction coil with the fixed magnetic field, and overcomes the shortcomings of the prior art that the test adopting a compass is not stable, thereby improving the testing efficiency and the accuracy of the induction coil polarity test; meanwhile, the electric circuit testing way can be performed together with other testing ways, thereby saving labor resources.
Description
Technical field
The utility model belongs to the electronic component fields of measurement, relates in particular to a kind of telefault polarity measurement device.
Background technology
When producing telefault, need measure the polarity of the telefault that produces fixed magnetic field, prior art generally adopts compass that the south poles of telefault is measured, because the pointer of compass is difficult stable, it is long that the wait compass is stablized the needed time, thereby cause the tester tired easily, testing efficiency is low, the false failure rate height.Simultaneously, adopt this operation of polarity of compass test telefault to be not easy to carry out simultaneously, thereby cause waste of manpower resource with other electronic component detection.
The utility model content
The purpose of this utility model is to provide a kind of telefault polarity measurement device, is intended to solve prior art and adopts compass that telefault is carried out polarity to judge and cause the problem that testing efficiency is low, false failure rate is high.
The utility model is achieved in that a kind of telefault polarity measurement device, and described device comprises:
Telefault, comprise have a fixed magnetic field treat test coil and inductive coil;
Receive the polarity discriminating circuit of the induced voltage of described inductive coil output;
The buffer circuit of isolating according to the induced voltage signal of described polarity discriminating circuit output;
The holding circuit that the induced voltage signal of described moment of isolating through buffer circuit is kept;
The display device that the induced voltage signal of exporting according to described holding circuit shows.
The utility model adopts electronic circuit to realize the polarity test of the telefault of fixed magnetic field, has overcome prior art and has adopted the instability of compass test, thereby improved the testing efficiency and the accuracy rate of telefault polarity test.
Description of drawings
Fig. 1 is the modular structure figure of a kind of telefault polarity measurement device of providing of the utility model embodiment;
Fig. 2 is the electronic circuitry of a kind of telefault polarity measurement device of providing of the utility model preferred embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment adopts electronic circuit to judge the polarity of the telefault of fixed magnetic field, thereby has improved the testing efficiency and the accuracy rate of telefault polarity test.
Fig. 1 shows the modular structure figure of a kind of telefault polarity measurement device that the utility model embodiment provides, and mainly comprises: telefault comprise have a fixed magnetic field treat test coil 1 and inductive coil 2, polarity discriminating circuit 3, filter capacitor 4, current-limiting resistance 5, buffer circuit 8, holding circuit 9 and display device 10; Add DC voltage (DC10V) at the two ends for the treatment of test coil 1, treat that test coil 1 is converted into magnetic energy with electric energy, this moment, the direction in magnetic field was fixed, and treated that promptly the polarity of test coil is fixed.In the two ends for the treatment of test coil 1 alive moments, inductive coil 2 is exported after the magnetic energy of sensing is converted into electric energy; Polarity discriminating circuit 3 receives the induced voltage signal of above-mentioned inductive coil 2 outputs, handles back output through filter capacitor 4 filtering and current-limiting resistance 5; Start working behind the induced voltage signal of the above-mentioned output of buffer circuit 8 receptions and trigger holding circuit 9, holding circuit 9 makes the induced voltage signal of moment continue to be convenient to display device 10 demonstration measurement results.
As an embodiment of the present utility model, when treating that test coil 1 number of turn is few, inductance value hour in order to guarantee the circuit operate as normal of back, must increase a driving amplifying circuit 7 between holding circuit 6 and buffer circuit 8, be used to amplify induced signal.
In the utility model, above-mentioned telefault polarity measurement device further comprises holding circuit 6, is connected with filter capacitor 4 and current-limiting resistance 5, is used for protecting buffer circuit 8 electronic components not burnt out.
Among the utility model embodiment, display device 10 can be digital display tube of pilot lamp, hummer, LCDs and LED or the like.
Fig. 2 shows the electronic circuitry in a kind of telefault polarity measurement device that the utility model preferred embodiment provides, and this circuit comprises: the polarity discriminating circuit comprises diode D1, D2, D3, D4; Filter capacitor C1, C2, C3, C4, current-limiting resistance R1, R2, holding circuit comprises breakdown diode D8, D9, D10, D11; Buffer circuit comprises photoelectrical coupler U1 and U2; By resistance R 3 and R4, the intersection RS NAND gate circuit that photoelectrical coupler U3 forms; Biasing resistor R6 and R7, by the pilot lamp that photodiode D5 and D6 form, hummer U4 and by triode Q1 and Q2, resistance R 5 and R8, the buzzer drive circuit that diode D7 forms.
DC voltage (DC10V) is added to treats test coil 1 two ends, treat that wherein 2 pin of test coil 1 connect the positive pole of voltage, 1 pin connects the negative pole of voltage, electric energy is converted into magnetic energy, magnetic direction is fixed, moment inductive coil 2 magnetic energy with induction of connecting direct supply are converted into electric energy, deliver to the polarity discriminating circuit, wherein the polarity discriminating circuit comprises D1, D2, D3, four diodes of D4, when treating that test coil 1 is identical with inductive coil 2 polarity, treat that promptly test coil 1 and inductive coil 2 all are under last "+" when "-", T1 is an end of the same name, according to the single-phase electric conductivity of diode, diode D1 and D3 conducting high level are delivered to photoelectrical coupler U1, photoelectrical coupler U1 work triggers intersection RS NAND gate circuit (74LS00) 1 pin (SET), and 6 pin set are high level, and the green light among the pilot lamp D6 is bright at this moment, 3 pin set are low level, triode Q1 ends, triode Q2 conducting, and hummer U4 cries.Pull up and treat test coil 1, disconnect the moment of direct supply, treat the loss of voltage at test coil 1 two ends, magnetic field disappears, inductive coil is under last "-" "+", same single-phase electric conductivity by diode, diode D2, D4 conducting high level is delivered to photoelectrical coupler U2, U2 is according to the electro-optic transfer characteristic of photoelectrical coupler, first electric energy is converted into luminous energy, again luminous energy is converted into second electric energy, intersection RS NAND gate circuit (74LS00) 5 pin (RESET) are triggered, 3 pin set are high level, red light among the pilot lamp D5 is bright, and 6 pin presets are low level, triode Q1 conducting, triode Q2 ends, and hummer U4 does not cry; The polarity unanimity of end of the same name is described this moment.
When treating that test coil 1 is opposite with inductive coil 2 polarity, treat that promptly test coil is under last "+" "-", inductive coil is under last "-" when "+", single-phase electric conductivity according to diode, diode D2, D4 conducting high level are delivered to photoelectrical coupler U2, U2 is according to the electro-optic transfer characteristic of photoelectrical coupler, first electric energy is converted into luminous energy, again luminous energy is converted into second electric energy, intersection RS NAND gate circuit (74LS00) 5 pin (RESET) are triggered, 3 pin set are high level, and red light is bright among the pilot lamp D5; 6 pin presets are low level, triode Q1 conducting, and triode Q2 ends, and hummer U4 does not cry.When pull out treat test coil 1 after, disconnect the moment of direct supply, treat the loss of voltage at test coil 1 two ends, magnetic field disappears, inductive coil is under last "+" "-", same single-phase electric conductivity by diode, diode D1 and D3 conducting high level are delivered to photoelectrical coupler U1, and photoelectrical coupler U1 work triggers intersection RS NAND gate circuit (74LS00) 1 pin (SET), and 6 pin set are high level, green light among the pilot lamp D6 is bright at this moment, 3 pin presets are low level, and triode Q1 ends, triode Q2 conducting, hummer U4 yowls, and illustrate that polarity is inconsistent this moment.
Among the utility model embodiment, holding circuit includes breakdown diode D8, D9, D10, D11, is used to limit because the voltage of spike that inductance produces or induction surpasses 6.1V+0.7V=6.8V, prevents to damage photoelectrical coupler.Filter capacitor C1, C2, C3, C4 are used to absorb spike, reach the purpose of protection.Current-limiting resistance R1 and R2 are used to prevent that the overcurrent of photoelectrical coupler U1, U2 from damaging.Photoelectrical coupler U1 and U2 play buffer action, and polarity discriminating circuit and polarity holding circuit are isolated.By resistance R 3 and R4, the intersection RS NAND gate circuit that photoelectrical coupler U3 forms is as holding circuit, is used to keep the induced voltage signal of the moment of polarity discriminating circuit output, thereby display device can correctly be discerned.
Among the utility model embodiment, when the number of turn for the treatment of test coil 1 seldom, when inductance is very little, must add the driving amplifying circuit, to add the number of turn of inductive coil simultaneously.Driving amplifying circuit is to be used to amplify induced voltage signal, makes voltage signal enough big, allows photoelectrical coupler work.Will add the number of turn of inductive coil simultaneously, for example ought treat that test coil is 250 to 320 circles, when line directly was 0.2 to 0.33mm copper cash, line of induction astragal directly was 0.2mm so, and the number of turn should be 1500 circles.
The telefault polarity measurement device that the utility model provides adopts electronic circuit to realize the measurement of telefault polarity, need be that red light is bright or green light is bright by the pilot lamp in the display device only, hummer is still not calling the polarity of judging telefault, easy to operate, therefore adopt the utility model to come this operation of polarity of inductance measuring coil to carry out simultaneously, saved human resources with other electronic component measuring operation.
The utility model adopts electronic circuit to realize the polarity test of the telefault of fixed magnetic field, has overcome prior art and has adopted the instability of compass test, thereby improved the testing efficiency and the accuracy rate of telefault polarity test; This electronic circuit detection mode can be carried out simultaneously with other detection mode simultaneously, saves human resources.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1, a kind of telefault polarity measurement device is characterized in that described device comprises:
Telefault, comprise have a fixed magnetic field treat test coil and inductive coil;
Receive the polarity discriminating circuit of the induced voltage of described inductive coil output;
The buffer circuit of isolating according to the induced voltage signal of described polarity discriminating circuit output;
The holding circuit that the induced voltage signal of described moment of isolating through buffer circuit is kept;
The display device that the induced voltage signal of exporting according to described holding circuit shows.
2, device as claimed in claim 1, it is characterized in that described device further comprises the driving amplifying circuit, when coil turn to be measured few, the induced voltage signal that inductance value hour, described driving amplifying circuit receive described polarity discriminating circuit output amplifies back output.
3, device as claimed in claim 1; it is characterized in that described device further comprises holding circuit, described holding circuit includes breakdown diode; spike or induced voltage that the restriction inductive coil produces surpass threshold value, protect the element in the described buffer circuit not burnt out.
4, device as claimed in claim 3 is characterized in that, described device further comprises the filter capacitor of the spike that absorbs described inductive coil generation.
5, device as claimed in claim 1 is characterized in that, described device further comprises the current-limiting resistance that prevents that the buffer circuit overcurrent from damaging.
6, device as claimed in claim 1 is characterized in that, the described test coil two ends for the treatment of add DC voltage.
7, device as claimed in claim 1 is characterized in that, described polarity discriminating circuit comprises four diodes.
8, device as claimed in claim 1, it is characterized in that, described buffer circuit comprises two photoelectrical couplers, described photoelectrical coupler is converted into luminous energy with first electric energy of polarity discriminating circuit output, again described luminous energy is converted into second electric energy, described first electric energy and described second electric energy are isolated.
9, device as claimed in claim 1 is characterized in that, described holding circuit is for intersecting the RS NAND gate circuit.
10, device as claimed in claim 1 is characterized in that, described display device is the digital display tube of pilot lamp, hummer, LCDs or LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201967031U CN201145720Y (en) | 2007-12-29 | 2007-12-29 | Apparatus for measuring inductance coil polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201967031U CN201145720Y (en) | 2007-12-29 | 2007-12-29 | Apparatus for measuring inductance coil polarity |
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| Publication Number | Publication Date |
|---|---|
| CN201145720Y true CN201145720Y (en) | 2008-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201967031U Expired - Fee Related CN201145720Y (en) | 2007-12-29 | 2007-12-29 | Apparatus for measuring inductance coil polarity |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
| CN105785221A (en) * | 2016-04-28 | 2016-07-20 | 东莞市通亿电子有限公司 | Inductor polarity detecting method, polarity detecting device and application thereof |
| CN105954647A (en) * | 2016-06-23 | 2016-09-21 | 国网江苏省电力公司连云港供电公司 | Split type mutual inductor polarity discriminator |
| CN109690232A (en) * | 2016-07-14 | 2019-04-26 | 三菱电机株式会社 | Noncontacting proximity sensor |
| CN109725231A (en) * | 2019-01-31 | 2019-05-07 | 潮州市汇能电机有限公司 | A kind of AC exciter armature coil polarity detector |
| CN112201125A (en) * | 2020-09-24 | 2021-01-08 | 常州信息职业技术学院 | Teaching device for visually judging homonymous terminal |
-
2007
- 2007-12-29 CN CNU2007201967031U patent/CN201145720Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636701A (en) * | 2012-04-17 | 2012-08-15 | 深南电路有限公司 | Inductor detecting instrument and method |
| CN105785221A (en) * | 2016-04-28 | 2016-07-20 | 东莞市通亿电子有限公司 | Inductor polarity detecting method, polarity detecting device and application thereof |
| CN105954647A (en) * | 2016-06-23 | 2016-09-21 | 国网江苏省电力公司连云港供电公司 | Split type mutual inductor polarity discriminator |
| CN109690232A (en) * | 2016-07-14 | 2019-04-26 | 三菱电机株式会社 | Noncontacting proximity sensor |
| CN109690232B (en) * | 2016-07-14 | 2020-12-29 | 三菱电机株式会社 | Non-contact sensor |
| CN109725231A (en) * | 2019-01-31 | 2019-05-07 | 潮州市汇能电机有限公司 | A kind of AC exciter armature coil polarity detector |
| CN112201125A (en) * | 2020-09-24 | 2021-01-08 | 常州信息职业技术学院 | Teaching device for visually judging homonymous terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20111229 |