CN2903989Y - Device for low cost testing DC electric machine running state - Google Patents
Device for low cost testing DC electric machine running state Download PDFInfo
- Publication number
- CN2903989Y CN2903989Y CN 200620028658 CN200620028658U CN2903989Y CN 2903989 Y CN2903989 Y CN 2903989Y CN 200620028658 CN200620028658 CN 200620028658 CN 200620028658 U CN200620028658 U CN 200620028658U CN 2903989 Y CN2903989 Y CN 2903989Y
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- motor
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Abstract
The utility model provides a low-cost DC motor working state measure device, which comprises a sampling circuit, an amplifier circuit, a shaping circuit and a SCM, wherein, one termination of the sampling circuit is connected with a DC motor cathode and the other termination is connected with the amplifier input terminal, the electrical current of the motor is sampled through the sampling resistor to produce synchronized signal with motor current; the synchronized signal is amplified by amplifying circuit and is coupled by a capacitance the coupling signal is shaped by the shaping circuit to output a pulse signal to the SCM through a resistance. The changed weak current produced by windings switching of the revolving motor can be converted into identifiable pulse signal, which can be used to judge motor running state. The additional sensors cost is not required for getting the information of the motor speed, whether stalled, and the rotation turns in unit time, which greatly reduces the measure cost. The utility model provides a new low-cost measure program for the DC motor working state, which can be widely used in automatic control technical field.
Description
Technical field
The utility model relates to motor rotation status detection device, and a kind of low-cost device of measuring the direct current generator operating condition especially is provided, and belongs to the electronic detector technical field.
Background technology
" motor rotation state " that the utility model relates to comprises motor speed, stall whether, and motor rotates the number of turns in the unit interval, in Industry Control, measures the direct current generator operating condition and has very important significance.At present, main method of testing has Hall method of testing and photoelectricity test method.The Hall method of testing is meant at motor internal and installed Hall element additional, utilizes the effect of changes of magnetic field to make the signal of Hall element output and motor rotational synchronization; The photoelectricity test method is meant on motor load or the both sides photoelectric sensor, utilizes motor to block when rotating or reflected light signal makes photoelectric sensor produce synchronous signal.Because above structure all need increase expensive sensor, so improved the cost of measuring.
Summary of the invention
The utility model discloses a kind of low-cost device of measuring the direct current generator operating condition, reduces direct current generator and measures cost, and the measurement mechanism of cheap and simple is provided, and has solved senser element costliness in the existing detecting instrument, shortcomings such as instrument cost height.
Because motor electric current when stall is steady DC current; When normal rotation, the faint AC signal that can superpose on the DC current, and this AC signal produces just because of the switching of winding.So the state of this AC signal has also objectively responded the state of machine operation.
The weak current that switching the produced variation of winding changed into discernible pulse signal after treatment when the utility model utilized motor to rotate, judge motor operating state by this signal, this device need not to increase expensive sensor, greatly reduces the measurement cost.
The utility model is by the following technical solutions:
Constitute the utility model by sample circuit, amplifying circuit, shaping circuit and single-chip microcomputer, wherein, the sample circuit one termination direct current generator negative pole that resistance R 1, R10, R4 constitute, the input end of another termination amplifying circuit, current of electric is by sampling resistor R1, R1 is gone up to be produced and the current of electric synchronizing signal, after amplifying, amplifying circuit is coupled by capacitor C 2, coupled signal is sent into single-chip microcomputer through shaping circuit shaping output pulse signal by resistance R 14 and is carried out computing, single-chip microcomputer carries out measurements and calculations to the input pulse signal, finally obtains the operating condition of motor.
Good effect of the present utility model is: the weak current that switching the produced variation of winding changes into discernible pulse signal after treatment when utilizing motor to rotate, utilize this signal to judge motor operating state, this device need not to increase expensive sensor can obtain motor speed, stall whether, motor rotates status informations such as the number of turns in unit interval, greatly reduce the measurement cost, for the low-cost measurement of direct current generator duty provides brand-new scheme, can be widely used in the automatic control technology field.
Description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
According to shown in Figure 1, the current signal of motor A obtains synchronous voltage signal by sample circuit 1; Through amplifying circuit 2 feeble signal is amplified; Signal transition after shaping circuit 3 is responsible for amplifying becomes the pulse tach signal.If the motor windings number is N, the recurrence interval is T1, then has:
Motor speed (r.p.m)=1/NT1
Pulse number/N in the number of turns=unit interval T2 that rotates in the unit interval T2
As motor in working order down, single-chip microcomputer 4 detects less than pulse signal, and motor rotation blockage then is described.
According to Fig. 2, the utility model is by sample circuit 1, amplifying circuit 2, shaping circuit 3 and single-chip microcomputer 4 constitute the utility model, wherein, resistance R 1, R10, the negative pole of the sample circuit one termination direct current generator A that R4 constitutes, the input end of another termination amplifying circuit 2, in amplifying circuit 2, resistance R 17 is connected across 1 of amplifier U1A, between 2 pin, and by resistance R 3 ground connection, R10, connect 3 pin of amplifier UA1 after the R4 parallel connection, motor A electric current is by sampling resistor R1, R1 is gone up to be produced and motor A current synchronous signal, amplified signal is coupled to shaping circuit 3 by capacitor C 2, and resistance R 18 is connected across 6 of amplifier U1B in the shaping circuit 3, between 7 pin, and by resistance R 11 ground connection, R13, connect 5 pin of amplifier U1B after the C2 parallel connection, coupled signal is sent into single-chip microcomputer 4 through shaping circuit 3 shaping output pulse signals by resistance R 14 and is carried out computing, and 4 pairs of input pulse signals of single-chip microcomputer carry out measurements and calculations, finally obtain the operating condition of motor A.
Claims (2)
1, a kind of low-cost device of measuring the direct current generator operating condition, it is characterized in that: by sample circuit, amplifying circuit, shaping circuit and monolithic mechanism, wherein, one termination direct current generator negative pole of sample circuit, the input end of another termination amplifying circuit, current of electric make on it to produce and the current of electric synchronizing signal by sampling resistor, be coupled by coupling capacitance after amplifying circuit amplifies, coupled signal is sent into single-chip microcomputer through shaping circuit shaping output pulse signal by resistance.
2, according to the described device of claim, it is characterized in that: sample circuit is by resistance (R1), (R10), (R4) constitute, (R1), (R4) a termination (R10), other end ground connection, in amplifying circuit, resistance (R17) is connected across 1 of amplifier (U1A), between 2 pin, and by resistance (R3) ground connection, (R10), (R4) connect 3 pin of amplifier (UA1) after the parallel connection, motor (A) electric current is by sampling resistor (R1), resistance (R1) is gone up to be produced and motor (A) current synchronous signal, amplified signal is coupled to shaping circuit (3) by electric capacity (C2), resistance (R18) is connected across 6 of amplifier (U1B) in the shaping circuit (3), between 7 pin, and by resistance (R11) ground connection, resistance (R13), connect 5 pin of amplifier (U1B) after electric capacity (C2) parallel connection, coupled signal is sent into single-chip microcomputer (4) through shaping circuit (3) shaping output pulse signal by resistance (R14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620028658 CN2903989Y (en) | 2006-04-25 | 2006-04-25 | Device for low cost testing DC electric machine running state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620028658 CN2903989Y (en) | 2006-04-25 | 2006-04-25 | Device for low cost testing DC electric machine running state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2903989Y true CN2903989Y (en) | 2007-05-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620028658 Expired - Fee Related CN2903989Y (en) | 2006-04-25 | 2006-04-25 | Device for low cost testing DC electric machine running state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2903989Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786605A (en) * | 2012-10-31 | 2014-05-14 | 上海汽车集团股份有限公司 | Automobile seat position determination and adjustment |
| CN104422827A (en) * | 2013-09-10 | 2015-03-18 | 珠海格力电器股份有限公司 | Method and system for testing DC motor noise |
| CN104569816A (en) * | 2014-12-25 | 2015-04-29 | 延锋伟世通电子科技（上海）有限公司 | Detection circuit for vehicle-mounted direct-current motor |
| CN106908726A (en) * | 2017-03-09 | 2017-06-30 | 迈普通信技术股份有限公司 | The working condition detecting system of direct current generator, method and the network equipment |
| CN108226565A (en) * | 2018-01-16 | 2018-06-29 | 安徽机电职业技术学院 | A kind of SCM Based direct current generator speed measuring device |
-
2006
- 2006-04-25 CN CN 200620028658 patent/CN2903989Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786605A (en) * | 2012-10-31 | 2014-05-14 | 上海汽车集团股份有限公司 | Automobile seat position determination and adjustment |
| CN103786605B (en) * | 2012-10-31 | 2016-06-22 | 上海汽车集团股份有限公司 | The determination of automotive seat position and adjustment |
| CN104422827A (en) * | 2013-09-10 | 2015-03-18 | 珠海格力电器股份有限公司 | Method and system for testing DC motor noise |
| CN104569816A (en) * | 2014-12-25 | 2015-04-29 | 延锋伟世通电子科技（上海）有限公司 | Detection circuit for vehicle-mounted direct-current motor |
| CN106908726A (en) * | 2017-03-09 | 2017-06-30 | 迈普通信技术股份有限公司 | The working condition detecting system of direct current generator, method and the network equipment |
| CN106908726B (en) * | 2017-03-09 | 2019-09-03 | 迈普通信技术股份有限公司 | Working condition detection system, method and the network equipment of direct current generator |
| CN108226565A (en) * | 2018-01-16 | 2018-06-29 | 安徽机电职业技术学院 | A kind of SCM Based direct current generator speed measuring device |
| CN108226565B (en) * | 2018-01-16 | 2020-06-19 | 安徽机电职业技术学院 | Direct current motor speed measuring device based on single chip microcomputer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |