CN2108309U - Parameter tester for potentiometer - Google Patents

Parameter tester for potentiometer Download PDF

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Publication number
CN2108309U
CN2108309U CN 91230343 CN91230343U CN2108309U CN 2108309 U CN2108309 U CN 2108309U CN 91230343 CN91230343 CN 91230343 CN 91230343 U CN91230343 U CN 91230343U CN 2108309 U CN2108309 U CN 2108309U
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CN
China
Prior art keywords
circuit
potentiometer
testing
foots
parameter
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Granted
Application number
CN 91230343
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Chinese (zh)
Inventor
石正鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STATE-RUN HONGMING RADIO EQUIPMENT GENERAL FACTORY CHENGDU
Original Assignee
STATE-RUN HONGMING RADIO EQUIPMENT GENERAL FACTORY CHENGDU
Priority date (The priority date 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 date listed.)
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Application filed by STATE-RUN HONGMING RADIO EQUIPMENT GENERAL FACTORY CHENGDU filed Critical STATE-RUN HONGMING RADIO EQUIPMENT GENERAL FACTORY CHENGDU
Priority to CN 91230343 priority Critical patent/CN2108309U/en
Publication of CN2108309U publication Critical patent/CN2108309U/en
Granted legal-status Critical Current

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Abstract

The utility model relates to a parameter tester for a potentiometer, which is suitable for the automatic switching testing and detecting on the same station of the seven parameters on a potentiometer. The utility model comprises an input circuit, a judgment circuit, a main control circuit, a standard setting circuit, a testing converting circuit, a noise amplifying circuit, a constant current circuit A, C and a constant voltage circuit A. Therefore, the utility model has high testing precision and high detecting efficiency.

Description

Parameter tester for potentiometer
The utility model relates to the detection of potentiometer parameter, and particularly the multiparameter to the potentiometer product detects automatically, to judge non-defective unit or defective products.
Potentiometer parameter detecting instrument in the past is generally one-parameter and detects, and detects each parameter of potentiometer respectively, and mostly is transistor type or electron tube, and is backward in technique.
The purpose of this utility model be to provide a kind of can be on same station the detector of the multiple parameter of conversion testing potentiometer automatically, be suitable for the total resistance to various potentiometers, concentrated contact resistance (current noise), slip noise (voltage noise) variation characteristic curve, the detection of termination zero-bit 1T and termination zero-bit 3T resistance and the effective variable range parameter of resistance.
This instrument has following several features:
1, adopts novel big plate integrated circuit, reliability height.
2, not only can make multi-parameters test, also can do the choosing of one-parameter or arbitrary parameter and survey.
3, test speed is fast, finishes population parameter test on same station in 1 to 2 second, suitable especially flowing water production in enormous quantities and advance factory's warehouse-in and detect.
4, light, it is low to consume energy, and meets the IEC standard code.
The technical solution of the utility model is as follows:
Fig. 1 is the utility model potentiometer parameter detecting instrument functional-block diagram.
Fig. 2 is the utility model potentiometer parameter detecting instrument detection signal input figure.
Fig. 3 is the utility model potentiometer parameter detecting instrument test procedure figure.
Fig. 4 is the utility model potentiometer parameter detecting instrument governor circuit figure.
Referring to Fig. 1, potentiometer parameter detecting instrument of the present utility model is made up of following part.
Input circuit: the buffering operational amplifier that adopts novel high impedance low-noise high-voltage. Its effect is: isolation and impedance matching.
Compare amplifying circuit: use relatively amplifying circuit of voltage operational. This amplifying circuit is that tested parameters and specification are compared and enlarged, and exports to decision circuitry.
Decision circuitry: under the effect of control circuit, the signal of being defeated by comparing amplifying circuit latchs differentiation, to judge non-defective unit and defective products. Its display packing is dichromatic LED and buzzer. Green expression is qualified, and redness and buzzing sound indication are defective.
Control circuit: formed by a series of gate circuits and photoelectric coupling circuit etc., by the program that sets in advance, measured parameter is carried out conversion testing.
Specification circuit E: seven parameters that it is tested with potentiometer, by the product technology conditional request, set to give and put, for the benchmark of making comparisons of amplifying circuit relatively.
Test event change-over circuit: under the control circuit effect, by the program of setting in advance, seven parameters of potentiometer are carried out conversion testing.
The noise amplifying circuit: it is made up of buffering amplifier, bandpass filtering, positive discharge circuit, tested potentiometer slip noise can be amplified by a certain percentage.
Constant-current circuit I: form by computing circuit.For testing total resistance Rx, concentrated contact resistance RJ usefulness, do the constant flow method test.
Constant voltage circuit II:, make constant-voltage method and measure usefulness for measurement noise Ux, variation characteristic By and the effective variable range of resistance etc.
Constant-current circuit III:, make constant flow method and measure usefulness for test cap zeropoint resistance To.
Rx: tested potentiometer, 1T, 2T, 3T are respectively three terminations of potentiometer.
Embodiment:
The utility model embodiment principle is addressed Fig. 1, Fig. 2, Fig. 3 on seeing, wherein, governor circuit is made following brief description.(referring to governor circuit Fig. 4)
The title and the effect of main components and parts in the governor circuit:
1), GD1, GD2: photoelectricity Coupling Control Unit.When K connected, 4 foots of photoelectricity Coupling Control Unit just had a noble potential " H " output; When K disconnects, then not output.
2), U1, U3, U6: not circuit.(being phase inverter again) done paraphase and used.
3), U2, U4: buffer circuit.The main buffer action that rises in circuit.
4), U5: NAND gate circuit (two Sheffer stroke gate).
5), U7, U9: AND circuit.(two and door)
6), U8: OR circuit.(two or door)
7), relay: J 1, J 2, J 3, J 4
8), M: be short-circuited conducting sleeve.When changing short-circuited conducting sleeve, can make instrument have following two kinds of test procedures:
The program I: K-→ 1:ON--By(puts mid point) (slip)/() Ux(2T voltage 〉=5～95%E)--Rx--R J--K-→ 2:ON (slip)/() r 01T(slip)/() r 03T
Program II: K-→ 1:ON--R X--R J--K--1:OFF.
The circuit working principle:
Tested potentiometer Rx is placed in the test fixture, and 2T is put central point; Open the instrument setup test; When K puts 1,4 foots of photoelectricity Coupling Control Unit GD1 have a noble potential " H " output, then U 13 foots be " H ", 2 foots be " L ", 5 is " L " enough, 4 foots are " H "; U 75 foots be " H ", 6 are subjected to enough U 6, U 8Deng control,, be not difficult to find out U from potentiometric analysis 76 the foot also be " H "; Then yes " H " for 4 foots; U so 25 foots and 4 be enough " H ", U 35 foots be " H ", 4 then is " L ", relay J so enough 2With regard to conducting work; At this moment test circuit is in test potential device variation characteristic By state;
After the 2T of tested potentiometer Rx end was done the slip of one-period, variation characteristic By and moving noise Ux had all surveyed; If By and Ux are all qualified, and Rx 2 TThe change in voltage scope of end satisfies following formula: 5%E 〉=U 2T〉=95%E(E is a definite value), like this, the 3rd parameter of potentiometer: the effective variable range of resistance is also just tested and is finished.
At this moment test circuit and decision circuitry all have qualified signal output (it is qualified that By and Ux all show automatically), at this moment, utilize U 2TVariation range, export two groups of signal: U 2TAnd U 2T(see U 91 foot and 2 enough), when satisfying above formula, U 2T1And U 2T2Noble potential " H " is all arranged, then U 93 foots be " H ", owing to By and Ux are all qualified, U then 3Also be noble potential " H ", (when all parameters of tested potentiometer are all qualified, U 3Be only " H "; If there is a parameter defective, U then 3Be " L " just) like this, U 94 the foot be " H "; U 8Though 8 foots be " L ", 9 is " H " enough, then 10 also is " H ", U 71 foot and 2 foots be " H ", 3 is " H " enough, U 43 foots and 2 also be " H " enough, U 310 the foot be " L ", relay J 4Start working.
Work as J 4One energising work is then because U 810 be " H ", U 612 the foot be " L ", U 7Though 8 foots be " H ", 9 foots be " L ", 10 foots are " L " just also, equally, U 75 foots be " H ", 6 foots be " L ", 4 sufficient be " L " just also, through U 2, U 3After, because U 34 the foot be " H ", relay J 2Quit work.At this moment, circuit is in testing total resistance Rx state;
Because delay circuit R 10, C 6Effect U 5One " L " of 11 foot outputs; U 610 foots then be " H ", again through the (R that once delays time 14, C 7), U 46 the foot be " H ", U 312 foots be " L " just, relay J 5Also then start working, circuit is in again to measure concentrates contact resistance R JState.(general delay circuit: about RC ≈ 10US), if, R XAnd R JAll good, instrument is tested automatically and is shown and reading.
At this moment, K will beat to 2, photoelectricity Coupling Control Unit GD 24 foots one noble potential " H " output is arranged again; And this moment GD 14 the foot be " L ", from circuit analysis as can be known, U 71 foot be " L ", 3 must be " L " also enough, through U 4After, U 310 the foot be " H ", J 4Then quit work;
Equally, U 312 the foot also be " H ", J 5Quit work too.(R XAnd R JAll test), like this, we are again from GD 2Later circuit analysis: U 17 foots be " H ", 6 foots are " L " just, 10 foots are " H ", U 23 foots and 2 be enough " H ", U 32 the foot be " L ", relay J 1Start working again, circuit is in zero position of testing resistance r again 01TState;
In like manner, owing to 2 of test product TBe to slide to 3 from 1T T; Governor circuit is through R 7C 3After the coupling filtering, U 29 foots and 10 be " H " enough, U 36 the foot then be " L ", relay J 3At this moment energising work, instrument are in zero position of testing resistance r again 03TState.If, zeropoint resistance r 01TAnd r 03TAlso all qualified, instrument can show and reading equally automatically.
So far, seven of test product parameter: By, Ux, effectively variable range, R X, R J, r 01TAnd r 03TAll all surveyed.
If, in test process, there is a parameter defective, then instrument is changed no longer automatically.
As: as By, Ux, R X, R J, r 01T, r 03THave one defective, from governor circuit analysis, U 96 sufficient input signal U 3Be " L ", certainly U 94 the foot also be " L ", U 8Input end 9 foot also be " L ", 8 foots are one fixing " L ", 10 foots then are " L ", U 73 the foot also be " L ", through U 4After, U 310 the foot be " H ", relay J 4Do not work, circuit can not be changed certainly automatically.
In addition, even By, Ux, Rx, RJ, r 01TAnd r 03TSix parameters are all qualified, if but the effective variable range of the resistance of test product is not enough.Undesirable; (promptly not satisfying the formula of setting requires: 5%E 〉=U 2T〉=95%E), U then 9 Input end 1 foot and the input signal U of 2 foots 2T1And U 2T2To be " L ", so U 93 foots then be " L ", same U 94 foots also be " L ", like this, by the previous circuit analysis as can be known, test circuit can not be realized conversion automatically under the control of governor circuit.
Test product is undertaken by technological process when production test, just is non-defective unit when having only whole parameters when test product qualified; If there is a parameter defective, will be as defective products (that is: unacceptable product).
A in the governor circuit, B, C, D, E, F, G each point signal, it mainly acts on is to provide corresponding synchronous control signal for measuring parameters.
For example:
1), B point signal: when test b y, provide an electronegative potential " L ", with the control display circuit.
2), C point signal: when test b y, provide an electronegative potential " L ", make synchronous judgment signal.
3), E point signal: at test R XAnd R JThe time, provide an electronegative potential " L ", the control display circuit.
4), F point signal: at test R XAnd R JThe time, an electronegative potential " L " is provided, make synchronous judgment signal.
5), A point signal: at test r 01TThe time, an electronegative potential " L " is provided, make synchronous judgment signal.
6), D point signal: at test r 0TThe time, an electronegative potential " L " is provided, make synchronous judgment signal.
More than the principle of work of Jie Shaoing belongs to the program I: as for program II: K → 1:oN-R X-R J-K → 1:oFF; By circuit analysis, the U of this moment 63 foots be " H ", 2 is " L " enough, can judge U thus 710 foots and 4 foots all export " L ", U so 34 the foot then be " H ", relay J 2Do not work, so three parameters of the effective variable range of By, Ux and resistance are not tested.
But at this moment, because U 8One " H " of 10 foot outputs, U 71 foot, 2 foots be " H ", 3 foots also are " H " certainly, through U 4After, U 310 the foot be " L ", relay J 4Energising work, circuit enter test Rx state, relay J then 5Connection work, circuit enter R again JTest mode; Its parameter testing result is automatic demonstration and reading.(this task is finished by other circuit)
Above test procedure is all finished on same station, and test product need not to change anchor clamps or position, and is to finish with interior automatic conversion testing in 2 seconds, and therefore, this patent tester has autorun.
The good effect that produces, concrete effectiveness indicator:
The important technological parameters of this patent tester is as follows:
1, total resistance: R X
1), scope: 100 Ω～2.2M Ω.
2), specification is set: 0～± 50%;
3), precision: ± 2%(setting value).
2, concentrate contact resistance: R J
1), specification setting range: 0～50%;
2), precision: ± 1.5%(setting value).
3, variation characteristic line: By;
1), specification setting range: 0～99%;
2), precision: ± 3%(setting value)
4, moving noise: Ux
1), test voltage: 20V(DC)
2), frequency range: 100HZ～10KHZ;
3), setting range: 10～500mv.
4), precision: ± 5% ± 10mv(setting value).
5, zeropoint resistance: r 01TAnd r 03T
1), setting range: 0～99 Ω.
2), precision: ± 2 Ω.
6, the effective variable range of resistance: 0～100%(is located at instrument internal).
7, other: power supply :～220V/50HZ, ± 10%;
Function: P 012VA
Full machine size: 470 * 320 * 130mm 3

Claims (1)

1, potentiometer parameter detecting instrument is characterized in that comprising:
Input circuit: form by the buffering operational amplifier, do to isolate and impedance matching usefulness,
Compare amplifying circuit: comprise relatively amplifying circuit of voltage operational, tested each parameter and specification can be compared and enlarged, export to decision circuitry,
Decision circuitry: under the effect of control circuit, to comparing the signal that amplifying circuit is defeated by, latch differentiation, to judge non-defective unit and defective products, its display part is dual color light emitting diode and hummer,
Control circuit: form by logic gates and photoelectricity coupled circuit,, measured parameter is carried out conversion testing by the program that configures in advance,
The specification initialization circuit: can be with seven parameters of tested potentiometer, set by the product technology conditional request and to preset, for the benchmark of making comparisons of amplifying circuit relatively,
The test conversion circuit: can under the control circuit effect,, carry out conversion testing to seven parameters of potentiometer by the program of setting in advance,
The noise amplifying circuit: comprise buffering amplifier, bandpass filtering, positive amplifying circuit,, amplify by a certain percentage the slip noise of tested potentiometer,
Constant-current circuit I: form by computing circuit, for testing total resistance Rx and concentrated contact resistance R JMake constant current source.
Constant voltage circuit II:, make constant-voltage method and measure usefulness for measuring moving noise Ux variation characteristic By and the effective variable range of resistance.
Constant-current circuit III: make constant flow method for zero position of testing resistance ro and measure usefulness.
CN 91230343 1991-12-16 1991-12-16 Parameter tester for potentiometer Granted CN2108309U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91230343 CN2108309U (en) 1991-12-16 1991-12-16 Parameter tester for potentiometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91230343 CN2108309U (en) 1991-12-16 1991-12-16 Parameter tester for potentiometer

Publications (1)

Publication Number Publication Date
CN2108309U true CN2108309U (en) 1992-06-24

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ID=4935687

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91230343 Granted CN2108309U (en) 1991-12-16 1991-12-16 Parameter tester for potentiometer

Country Status (1)

Country Link
CN (1) CN2108309U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102193039A (en) * 2010-04-28 2011-09-21 西安开天铁路电气股份有限公司 Linear tester and test method for potentiometers
CN104237644A (en) * 2014-09-28 2014-12-24 潘柯文 Multidirectional test circuit for simplex-duplex potentiometers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102193039A (en) * 2010-04-28 2011-09-21 西安开天铁路电气股份有限公司 Linear tester and test method for potentiometers
CN102193039B (en) * 2010-04-28 2012-12-12 西安开天铁路电气股份有限公司 Linear tester and test method for potentiometers
CN104237644A (en) * 2014-09-28 2014-12-24 潘柯文 Multidirectional test circuit for simplex-duplex potentiometers

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