CN104914378A - Electromagnetic relay characteristic parameter measuring instrument based on single chip microcomputer - Google Patents

Electromagnetic relay characteristic parameter measuring instrument based on single chip microcomputer Download PDF

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Publication number
CN104914378A
CN104914378A CN201510338620.0A CN201510338620A CN104914378A CN 104914378 A CN104914378 A CN 104914378A CN 201510338620 A CN201510338620 A CN 201510338620A CN 104914378 A CN104914378 A CN 104914378A
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China
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circuit
electromagnetic relay
resistance
voltage
chip microcomputer
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CN201510338620.0A
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Chinese (zh)
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CN104914378B (en
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吴冬燕
朱祥贤
蒋爱如
石瑞华
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Kunshan mozhite Electronic Material Co.,Ltd.
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Suzhou Institute of Industrial Technology
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Abstract

The invention discloses an electromagnetic relay characteristic parameter measuring instrument based on a single chip microcomputer, which comprises the single chip microcomputer, a power supply module, a voltmeter circuit for measuring pull-in and release voltage of the electromagnetic relay and a timer circuit for recording pull-in and release time of the electromagnetic relay, wherein the voltmeter circuit comprises a bleeder circuit, an AD conversion circuit and a voltage display circuit, and the voltage display circuit is connected with the signal output end of the AD conversion circuit; and the timer circuit comprises a timer timing circuit and a timer display circuit. A potentiometer is adjusted to change voltage at two ends of an electromagnetic coil of the electromagnetic relay, the pull-in and the release voltage of the electromagnetic relay are read via the voltage display circuit, and the pull-in and the release time of the electromagnetic relay are recorded by the timer display circuit. The pull-in voltage, the release voltage, the pull-in time and the release time of the electromagnetic relay can be measured, basis is provided for analyzing the quality and the reliability of the electromagnetic relay, the measurement is convenient, and the precision is high.

Description

SCM Based electromagnetic relay characterisitic parameter measuring instrument
Technical field
The present invention relates to a kind of SCM Based electromagnetic relay characterisitic parameter measuring instrument.
Background technology
Electromagnetic relay is generally made up of iron core, solenoid, armature, contact reed etc.As long as add certain voltage at solenoid two ends, certain electric current will be flow through in solenoid, thus generation galvanomagnetic effect, the pulling force that armature will overcome return spring under the effect of electromagnetic attracting force is inhaled to iron core, thus the moving contact of band moving armature and stationary contact (normally opened contact) adhesive.When after solenoid power-off, the suction of electromagnetism also disappears thereupon, and armature will return to original position at the reacting force of spring, and moving contact and original stationary contact (normally closed contact) are discharged.Such adhesive, release, thus the object reaching conducting in circuit, cut-out.
Electromagnetic relay all needs to measure its characterisitic parameter before dispatching from the factory, and comprises the characterisitic parameters such as pick-up voltage, release voltage, pickup time, release time.Still there is not the instrument that the characterisitic parameter of electromagnetic relay is measured at present, dispatch from the factory to the production of electromagnetic relay and bring inconvenience.
Summary of the invention
The object of the present invention is to provide a kind of SCM Based electromagnetic relay characterisitic parameter measuring instrument, the measurement to electromagnetic relay pick-up voltage, release voltage, pickup time and release time can be realized.
For achieving the above object, the technical solution adopted in the present invention is: SCM Based electromagnetic relay characterisitic parameter measuring instrument, comprise single-chip microcomputer, power module, for measuring the adhesive of electromagnetic relay, the voltmeter circuit of release voltage and the timer circuit for recording electromagnetic relay adhesive, release time;
Described voltmeter circuit comprises bleeder circuit, A/D convertor circuit and voltage display circuit, and described voltage display circuit is connected with the signal output part of A/D convertor circuit;
Described bleeder circuit comprises: LED light, resistance R116 and the potentiometer RP4 for regulating resistance R116 both end voltage; Described LED light is connected in the electromagnetic switch loop of electromagnetic relay, and described resistance R116 is connected in parallel on the solenoid two ends of electromagnetic relay; Be electrically connected with power module after resistance R116 resistance in series R117, potentiometer RP3, resistance R116 is connected with the signal input part of A/D convertor circuit with the electrical nodes of resistance R117;
Described timer circuit comprises timer circuit and timer display circuit;
The output resistance of regulator potentiometer RP4, change the solenoid both end voltage of electromagnetic relay, lighting and extinguishing according to LED light, reads adhesive, the release voltage of electromagnetic relay, by the adhesive of timer display circuit record electromagnetic relay, release time by voltage display circuit.
Described A/D convertor circuit adopts three and half A/D change-over circuits, comprises ICL7107CJL chip, is connected on ICL7107CJL chip: the filtering circuit be made up of resistance R2 and electric capacity C5; The integrating circuit be made up of resistance R1, electric capacity C3, electric capacity C4; The mu balanced circuit be made up of resistance R3, diode V6; The partial pressure potential device RP1 be connected with mu balanced circuit; The frequency adjustment circuit be made up of potentiometer RP2, resistance R4, electric capacity C7.
The timing switch circuit that described timer circuit comprises power tube Q4, power tube Q5, diode D101 and is connected on single-chip microcomputer;
Be electrically connected with the emitter of power tube Q5 after the base series resistor R120 of described power tube Q4, grounded emitter, be electrically connected with power module after the solenoid of collector series electrical magnetic relay, the solenoid two ends anti-parallel diodes D101 of electromagnetic relay; Ground connection after the emitter resistance in series R120 of power tube Q5, collector is electrically connected with power module, and base stage is connected with single-chip microcomputer; Normal open switch one end of electromagnetic relay, by wired earth, is electrically connected with power module after other end resistance in series R110, is connected with single-chip microcomputer simultaneously;
Described timing switch circuit comprises button S101, change-over switch S102, current-limiting resistance R111 and current-limiting resistance R112, and button S101 and change-over switch S102 is connected in parallel, and current-limiting resistance R111 and current-limiting resistance R112 is connected in parallel.
Described timer display circuit comprises the triode that seven sections of common anode pole charactrons, base stages are connected with single-chip microcomputer, and single-chip microcomputer controls to power to the common anode limit of charactron by triode.
Described power module comprises voltage stabilizer VR1, the Vin end of voltage stabilizer VR1 connects 12V direct voltage source, Vout end exports+5V DC voltage, between the Vin end of voltage stabilizer VR1 and GND hold the Vout of shunt capacitance C101, voltage stabilizer VR1 hold and GND hold between shunt capacitance C102.
Compared with prior art, the present invention reaches beneficial effectbe: provide a kind of SCM Based electromagnetic relay characterisitic parameter measuring instrument, the measurement to electromagnetic relay pick-up voltage, release voltage is realized by bleeder circuit, the measurement to electromagnetic relay pickup time and release time is realized by timer circuit, for the q&r analysis of electromagnetic relay provides foundation, measurement is convenient, degree of accuracy is high; Be provided with the voltage display circuit of electromagnetic relay pick-up voltage, release voltage, and the timer display circuit of pickup time and release time, can directly read every characterisitic parameter, reading is convenient, and measurement result is more directly perceived.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of voltmeter circuit.
Fig. 2 is the circuit diagram of timer circuit.
Fig. 3 is the circuit diagram of power module.
Embodiment
SCM Based electromagnetic relay characterisitic parameter measuring instrument, adopts a kind of miniature electro-magnetic relay characteristic parameter measuring instrument of the components and parts such as AT89S52 single-chip microcomputer and three and half A/D convertor circuits composition.Measuring instrument serves as voltage table primarily of three and half A/D convertor circuits, is used for measuring the minimum operate voltage of electromagnetic relay and maximum release voltage.Timer circuit connects timer circuit by AT89S52 singlechip chip and forms, and is used for recording electromagnetic relay pickup time and release time.Wherein, pick-up voltage, release voltage manually change input voltage to realize, and are finally measured by three and half A/D convertor circuits and by voltage display circuit output display.The time of adhesive, release is completed by single-chip microcomputer time block and by timer display circuit output display, has higher accuracy of detection.
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
SCM Based electromagnetic relay characterisitic parameter measuring instrument, comprise single-chip microcomputer, power module, for measuring the adhesive of electromagnetic relay, the voltmeter circuit of release voltage and the timer circuit for recording electromagnetic relay adhesive, release time.
Three and half A/D change-over circuits need to supply power with double circuit.As shown in Figure 3, power module comprises voltage stabilizer VR1, and the Vin end of voltage stabilizer VR1 connects 12V direct voltage source, and Vout end exports+5V DC voltage, between the Vin end of voltage stabilizer VR1 and GND hold the Vout of shunt capacitance C101, voltage stabilizer VR1 hold and GND hold between shunt capacitance C102.
As shown in Figure 1, voltmeter circuit comprises bleeder circuit, A/D convertor circuit and voltage display circuit, and voltage display circuit is connected with the signal output part of A/D convertor circuit.A/D convertor circuit adopts three and half A/D change-over circuits, comprises ICL7107CJL chip, is connected on ICL7107CJL chip: the filtering circuit be made up of resistance R2 and electric capacity C5; The integrating circuit be made up of resistance R1, electric capacity C3, electric capacity C4; The mu balanced circuit be made up of resistance R3, diode V6; The partial pressure potential device RP1 be connected with mu balanced circuit; The frequency adjustment circuit be made up of potentiometer RP2, resistance R4, electric capacity C7.ICL7107CJL chip is also connected with negative pressure circuit, negative pressure is produced by six Sheffer stroke gate U2A ~ U2E and electric capacity C1, electric capacity C2, diode V1, diode V2, when high level charges to electric capacity C2 through electric capacity C1, diode V2, low level is when electric capacity C2, diode V1 discharge to electric capacity C1, and at this moment C point can obtain a negative pressure.
Bleeder circuit comprises: LED light, resistance R116 and the potentiometer RP4 for regulating resistance R116 both end voltage.LED light is connected in the electromagnetic switch loop of electromagnetic relay, and this loop is powered by+5V the DC voltage output end of power module.Resistance R116 is connected in parallel on the solenoid two ends of electromagnetic relay; Be electrically connected with the 12V direct voltage source of power module after resistance R116 resistance in series R117, potentiometer RP3, resistance R116 is connected with the signal input part of A/D convertor circuit with the electrical nodes of resistance R117.
As shown in Figure 2, timer circuit comprises timer circuit and timer display circuit.
The timing switch circuit that timer circuit comprises power tube Q4, power tube Q5, diode D101 and is connected on single-chip microcomputer.Be electrically connected with the emitter of power tube Q5 after the base series resistor R120 of power tube Q4, grounded emitter, be electrically connected with the 12V direct current pressure side of power module after the solenoid of collector series electrical magnetic relay, the solenoid two ends anti-parallel diodes D101 of electromagnetic relay.
Ground connection after the emitter resistance in series R120 of power tube Q5, collector is electrically connected with+5V the DC voltage output end of power module, and base stage is connected with single-chip microcomputer.Normal open switch one end of electromagnetic relay, by wired earth, is electrically connected with+5V the DC voltage output end of power module after other end resistance in series R110, is connected with single-chip microcomputer simultaneously.Timing switch circuit comprises button S101, change-over switch S102, current-limiting resistance R111 and current-limiting resistance R112, and button S101 and change-over switch S102 is connected in parallel, and current-limiting resistance R111 and current-limiting resistance R112 is connected in parallel.
Timer display circuit comprises the triode that seven sections of common anode pole charactrons, base stages are connected with single-chip microcomputer, and single-chip microcomputer controls to power to the common anode limit of charactron by triode.
When the present invention works, by the output resistance of regulator potentiometer RP4, change the solenoid both end voltage of electromagnetic relay, lighting and extinguishing according to LED light, adhesive, the release voltage of electromagnetic relay is read, by the adhesive of timer display circuit record electromagnetic relay, release time by voltage display circuit.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (5)

1. SCM Based electromagnetic relay characterisitic parameter measuring instrument, it is characterized in that, comprise single-chip microcomputer, power module, for measuring the adhesive of electromagnetic relay, the voltmeter circuit of release voltage and the timer circuit for recording electromagnetic relay adhesive, release time;
Described voltmeter circuit comprises bleeder circuit, A/D convertor circuit and voltage display circuit, and described voltage display circuit is connected with the signal output part of A/D convertor circuit;
Described bleeder circuit comprises: LED light, resistance R116 and the potentiometer RP4 for regulating resistance R116 both end voltage; Described LED light is connected in the electromagnetic switch loop of electromagnetic relay, and described resistance R116 is connected in parallel on the solenoid two ends of electromagnetic relay; Be electrically connected with power module after resistance R116 resistance in series R117, potentiometer RP3, resistance R116 is connected with the signal input part of A/D convertor circuit with the electrical nodes of resistance R117;
Described timer circuit comprises timer circuit and timer display circuit;
The output resistance of regulator potentiometer RP4, change the solenoid both end voltage of electromagnetic relay, lighting and extinguishing according to LED light, reads adhesive, the release voltage of electromagnetic relay, by the adhesive of timer display circuit record electromagnetic relay, release time by voltage display circuit.
2. SCM Based electromagnetic relay characterisitic parameter measuring instrument according to claim 1, it is characterized in that, described A/D convertor circuit adopts three and half A/D change-over circuits, comprise ICL7107CJL chip, be connected on ICL7107CJL chip: the filtering circuit be made up of resistance R2 and electric capacity C5; The integrating circuit be made up of resistance R1, electric capacity C3, electric capacity C4; The mu balanced circuit be made up of resistance R3, diode V6; The partial pressure potential device RP1 be connected with mu balanced circuit; The frequency adjustment circuit be made up of potentiometer RP2, resistance R4, electric capacity C7.
3. SCM Based electromagnetic relay characterisitic parameter measuring instrument according to claim 1, is characterized in that, the timing switch circuit that described timer circuit comprises power tube Q4, power tube Q5, diode D101 and is connected on single-chip microcomputer;
Be electrically connected with the emitter of power tube Q5 after the base series resistor R120 of described power tube Q4, grounded emitter, be electrically connected with power module after the solenoid of collector series electrical magnetic relay, the solenoid two ends anti-parallel diodes D101 of electromagnetic relay; Ground connection after the emitter resistance in series R120 of power tube Q5, collector is electrically connected with power module, and base stage is connected with single-chip microcomputer; Normal open switch one end of electromagnetic relay, by wired earth, is electrically connected with power module after other end resistance in series R110, is connected with single-chip microcomputer simultaneously;
Described timing switch circuit comprises button S101, change-over switch S102, current-limiting resistance R111 and current-limiting resistance R112, and button S101 and change-over switch S102 is connected in parallel, and current-limiting resistance R111 and current-limiting resistance R112 is connected in parallel.
4. SCM Based electromagnetic relay characterisitic parameter measuring instrument according to claim 1, it is characterized in that, described timer display circuit comprises the triode that seven sections of common anode pole charactrons, base stages are connected with single-chip microcomputer, and single-chip microcomputer controls to power to the common anode limit of charactron by triode.
5. SCM Based electromagnetic relay characterisitic parameter measuring instrument according to claim 1, it is characterized in that, described power module comprises voltage stabilizer VR1, the Vin end of voltage stabilizer VR1 connects 12V direct voltage source, Vout end exports+5V DC voltage, between the Vin end of voltage stabilizer VR1 and GND hold the Vout of shunt capacitance C101, voltage stabilizer VR1 hold and GND hold between shunt capacitance C102.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107966656A (en) * 2017-11-30 2018-04-27 蒋小辉 A kind of matrix form electromagnetic relay intelligent comprehensive parameter detection device

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Publication number Priority date Publication date Assignee Title
JPH0894702A (en) * 1994-09-28 1996-04-12 Nec Tohoku Ltd Withstand voltage testing device for electromagnetic relay
JP2011210546A (en) * 2010-03-30 2011-10-20 Yamatake Corp Relay end-of-service-life forecasting device
CN203101592U (en) * 2013-03-21 2013-07-31 河北工业大学 Electromagnetic relay comprehensive parameter test instrument
CN204719203U (en) * 2015-06-18 2015-10-21 苏州工业职业技术学院 SCM Based electromagnetic relay characterisitic parameter measuring instrument

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JPH0894702A (en) * 1994-09-28 1996-04-12 Nec Tohoku Ltd Withstand voltage testing device for electromagnetic relay
JP2011210546A (en) * 2010-03-30 2011-10-20 Yamatake Corp Relay end-of-service-life forecasting device
CN203101592U (en) * 2013-03-21 2013-07-31 河北工业大学 Electromagnetic relay comprehensive parameter test instrument
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107966656A (en) * 2017-11-30 2018-04-27 蒋小辉 A kind of matrix form electromagnetic relay intelligent comprehensive parameter detection device

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Inventor after: Zhu Xiangxian

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Effective date of registration: 20211118

Address after: 215221 No. 10, Yurong Plaza, Qiandeng Town, Kunshan City, Suzhou City, Jiangsu Province

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Address before: No.1 Zhineng Avenue, International Education Park, Wuzhong Avenue, Wuzhong District, Suzhou City, Jiangsu Province, 215104

Patentee before: Suzhou Vocational Institute of Industrial Technology