CN105277884A - Testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering - Google Patents
Testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering Download PDFInfo
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- CN105277884A CN105277884A CN201510818745.3A CN201510818745A CN105277884A CN 105277884 A CN105277884 A CN 105277884A CN 201510818745 A CN201510818745 A CN 201510818745A CN 105277884 A CN105277884 A CN 105277884A
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Abstract
The present invention discloses a testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering. The testing rotating speed automatic adjustment type motor test system comprises a single chip microcomputer, a variable frequency motor control unit, an output display unit, an operation unit and a band-pass filtering unit which are connected with the single chip microcomputer, a rotating speed signal acquisition unit connected with the band-pass filtering unit, a tested motor connected with the rotating speed signal acquisition unit, a variable frequency motor connected with the tested motor, and a power supply connected with the variable frequency motor. The variable frequency motor is connected with the variable frequency motor control unit. The testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering is provided with the band-pass filtering unit, and the band-pass filtering unit is configured to filter interference signals doped in rotating speed signals, so that the influence of the interference signals on the rotating speed signals is avoided, therefore the test result of the tested motor may be not influenced.
Description
Technical field
The present invention relates to a kind of Motor Measuring System, specifically refer to a kind of test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering.
Background technology
Along with national economy and scientific and technical development, the effect that motor plays in all trades and professions is more and more important.Meanwhile, along with the development of every profession and trade, propose more and more higher requirement to motor product, therefore motor product all needs to verify whether its characteristic reaches application requirement by some pilot projects before dispatching from the factory.Motor Measuring Technology has considerable meaning for the performance verification of motor.But traditional Motor Measuring System needs the rotating speed that manually can only be adjusted tested motor during the parameter under testing of electric motors different rotating speeds by tester, have impact on testing efficiency to a great extent.
Summary of the invention
The object of the invention is to overcome the inefficient defect of existing Motor Measuring System, a kind of test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering is provided.
Object of the present invention is achieved through the following technical solutions: based on the test rotating speed automatic adjustment Motor Measuring System of bandpass filtering, by single-chip microcomputer, the variable-frequency motor control module be connected with single-chip microcomputer, output display unit, operating unit and bandpass filtering unit, the tach signal collecting unit be connected with bandpass filtering unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, and the power supply be connected with variable-frequency motor forms, described variable-frequency motor is also connected with variable-frequency motor control module, described bandpass filtering unit is by amplifier P2, amplifier P3, triode VT4, negative pole is connected with the positive pole of amplifier P2 after electric capacity C3, positive pole then forms the electric capacity C2 of the input end of this bandpass filtering unit, one end is connected with the positive pole of amplifier P2, the resistance R8 of ground connection while the other end is then connected with the base stage of triode VT4, one end is connected with the negative pole of electric capacity C2, the resistance R9 that the other end is then connected with the output terminal of amplifier P2, be serially connected in the resistance R10 between the output terminal of amplifier P2 and the positive pole of amplifier P3, be serially connected in the electric capacity C7 between the positive pole of amplifier P3 and output terminal, positive pole is connected with the positive pole of amplifier P3, the electric capacity C6 of minus earth, positive pole is connected with the positive pole of amplifier P2, the electric capacity C4 of minus earth, and form with the polar capacitor C5 that electric capacity C4 is in parallel, the positive pole of described amplifier P2 connects 5V voltage, its output terminal is then all connected with the emitter of triode VT4 with negative pole, the grounded collector of described triode VT4, the output terminal of described amplifier P3 then forms the output terminal of this bandpass filtering unit, the input end of described bandpass filtering unit is connected with the output terminal of tach signal collecting unit, its output terminal is then connected with single-chip microcomputer.
Further, described tach signal collecting unit by being arranged on by the speed probe in the rotating shaft of measured motor, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms; Described Acquisition Circuit is also connected with single-chip microcomputer.
Described Acquisition Circuit is by triode VT1, amplifier P1, positive pole is ground connection after voltage stabilizing diode D2, the electric capacity C1 of minus earth, P pole is connected with the output terminal of speed probe, N pole is then in turn through diode D1 that resistance R2 is connected with the negative pole of electric capacity C1 after resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, be serially connected in the resistance R7 between the positive pole of amplifier P1 and output terminal, and forward end is connected with the output terminal of amplifier P1, the polarity-inverting amplifier P2 that backward end is then connected with the positive pole of electric capacity C2 forms, while the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1.
Described constant-current source circuit by triode VT2, triode VT3, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn forms; The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3; The base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2; The tie point of described resistance R4 and resistance R5 connects 5V voltage.
Described triode VT1, triode VT2 and triode VT3 all adopt NPN type triode.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can adjust by the rotating speed of measured motor fast in test process, to test by the parameter of measured motor under different rotating speeds, improves the efficiency of electromechanical testing.
(2) speed probe of the present invention is highly sensitive, can collect the very first time by the real-time rotate speed signal of measured motor, avoid signal to incur loss through delay and bring impact to test result.
(3) the present invention is provided with bandpass filtering unit, and it can filter the undesired signal be entrained in tach signal, avoids interference signal and impacts tach signal, thus impact is by the test result of measured motor.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is the circuit structure diagram of tach signal collecting unit of the present invention.
Fig. 3 is the circuit structure diagram of bandpass filtering unit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering of the present invention, by single-chip microcomputer, the bandpass filtering unit be connected with single-chip microcomputer, variable-frequency motor control module, output display unit and operating unit, the tach signal collecting unit be connected with bandpass filtering unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, and the power supply be connected with variable-frequency motor forms; Described variable-frequency motor is also connected with variable-frequency motor control module.
Wherein, power supply is used for providing working power to variable-frequency motor and by measured motor, and variable-frequency motor is then for driving tested electric machine rotation.The instruction of variable-frequency motor control module then for sending according to single-chip microcomputer controls variable-frequency motor, controls by the rotating speed of measured motor to reach.Tach signal collecting unit is then for gathering by the real-time rotate speed signal of measured motor; Bandpass filtering unit then can filter the undesired signal be entrained in tach signal, avoids interference signal and impacts tach signal, thus impact is by the test result of measured motor.Output display unit is used for showing intuitively by the real-time rotate speed of measured motor, and tester can assess by the performance of measured motor according to by the real-time rotate speed of measured motor, and this output display unit can adopt traditional display to realize.Operating unit is as human-computer exchange window, and tester can by it to single-chip microcomputer input control parameter.Single-chip microcomputer is then as control center of the present invention, it is analyzed for the controling parameters inputted tester, and sending steering order to variable-frequency motor control module, its tach signal that can also collect tach signal collecting unit is analyzed and exports to output display unit simultaneously.
As shown in Figure 2, it is by speed probe for the structure of this tach signal collecting unit, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms.
Described Acquisition Circuit is by triode VT1, and amplifier P1, resistance R1, resistance R2, resistance R3, resistance R7, polarity-inverting amplifier P2, electric capacity C1, diode D1 and voltage stabilizing diode D2 form.Constant-current source circuit is then by triode VT2, and triode VT3, resistance R4, resistance R5 and resistance R6 form.
Wherein, one end of resistance R4 is connected with the base stage of triode VT2, its other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn.The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3.The tie point of described resistance R4 and resistance R5 connects 5V voltage, provides operating voltage for giving tach signal collecting unit.
In addition, positive pole ground connection, its minus earth after voltage stabilizing diode D2 of electric capacity C1, the P pole of diode D1 is connected with the output terminal of speed probe, its N pole is then connected with the negative pole of electric capacity C1 after resistance R3 through resistance R2 in turn, and the base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2.One end of resistance R1 is connected with the base stage of triode VT1, its other end is then connected with the P pole of diode D1, between the positive pole that resistance R7 is then serially connected in amplifier P1 and output terminal, the output terminal that the forward end of polarity-inverting amplifier P2 is connected with the output terminal of amplifier P1, its backward end then forms this tach signal collecting unit its be connected with bandpass filtering unit.While the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1.In order to reach better implementation result, the RS-3102 type piezoelectric sensor for measuring rotational speed that this speed probe preferentially adopts Beijing Tuo Puruisheng observation and control technology company limited to produce realizes.Described triode VT1, triode VT2 and triode VT3 then all preferentially adopt NPN type triode to realize.
As shown in Figure 3, this bandpass filtering unit is by amplifier P2, and amplifier P3, triode VT4, resistance R8, resistance R9, resistance R10, electric capacity C2, electric capacity C3, electric capacity C4, polar capacitor C5, electric capacity C6 and electric capacity C7 form.
During connection, the negative pole of electric capacity C2 is connected with the positive pole of amplifier P2 after electric capacity C3, its positive pole then formed this bandpass filtering unit input end its be connected with the output terminal of tach signal collecting unit, one end of resistance R8 is connected with the positive pole of amplifier P2, ground connection while its other end is then connected with the base stage of triode VT4, one end of resistance R9 is connected with the negative pole of electric capacity C2, its other end is then connected with the output terminal of amplifier P2, resistance R10 is then serially connected between the output terminal of amplifier P2 and the positive pole of amplifier P3, between the positive pole that electric capacity C7 is serially connected in amplifier P3 and output terminal, the positive pole of electric capacity C6 is connected with the positive pole of amplifier P3, its minus earth, the positive pole of electric capacity C4 is connected with the positive pole of amplifier P2, its minus earth, polar capacitor C5 is then in parallel with electric capacity C4.The positive pole of described amplifier P2 connects 5V voltage, and it is powered for giving this bandpass filtering unit, and the output terminal of this amplifier P2 is then all connected with the emitter of triode VT4 with negative pole.The grounded collector of described triode VT4; The output terminal of described amplifier P3 then formed this bandpass filtering unit output terminal its be connected with single-chip microcomputer.
As mentioned above, just well the present invention can be implemented.
Claims (5)
1. based on the test rotating speed automatic adjustment Motor Measuring System of bandpass filtering, it is characterized in that, by single-chip microcomputer, the variable-frequency motor control module be connected with single-chip microcomputer respectively, output display unit, operating unit and bandpass filtering unit, the tach signal collecting unit be connected with bandpass filtering unit, be connected with tach signal collecting unit by measured motor, the variable-frequency motor be connected with by measured motor, and the power supply be connected with variable-frequency motor forms, described variable-frequency motor is also connected with variable-frequency motor control module, described bandpass filtering unit is by amplifier P2, amplifier P3, triode VT4, negative pole is connected with the positive pole of amplifier P2 after electric capacity C3, positive pole then forms the electric capacity C2 of the input end of this bandpass filtering unit, one end is connected with the positive pole of amplifier P2, the resistance R8 of ground connection while the other end is then connected with the base stage of triode VT4, one end is connected with the negative pole of electric capacity C2, the resistance R9 that the other end is then connected with the output terminal of amplifier P2, be serially connected in the resistance R10 between the output terminal of amplifier P2 and the positive pole of amplifier P3, be serially connected in the electric capacity C7 between the positive pole of amplifier P3 and output terminal, positive pole is connected with the positive pole of amplifier P3, the electric capacity C6 of minus earth, positive pole is connected with the positive pole of amplifier P2, the electric capacity C4 of minus earth, and form with the polar capacitor C5 that electric capacity C4 is in parallel, the positive pole of described amplifier P2 connects 5V voltage, its output terminal is then all connected with the emitter of triode VT4 with negative pole, the grounded collector of described triode VT4, the output terminal of described amplifier P3 then forms the output terminal of this bandpass filtering unit, the input end of described bandpass filtering unit is connected with the output terminal of tach signal collecting unit, its output terminal is then connected with single-chip microcomputer.
2. the test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering according to claim 1, it is characterized in that: described tach signal collecting unit is by being arranged on by the speed probe in the rotating shaft of measured motor, the Acquisition Circuit be connected with speed probe, and the constant-current source circuit be connected with Acquisition Circuit forms; Described Acquisition Circuit is also connected with single-chip microcomputer.
3. the test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering according to claim 2, it is characterized in that: described Acquisition Circuit is by triode VT1, amplifier P1, positive pole is ground connection after voltage stabilizing diode D2, the electric capacity C1 of minus earth, P pole is connected with the output terminal of speed probe, N pole is then in turn through diode D1 that resistance R2 is connected with the negative pole of electric capacity C1 after resistance R3, one end is connected with the base stage of triode VT1, the resistance R1 that the other end is then connected with the P pole of diode D1, be serially connected in the resistance R7 between the positive pole of amplifier P1 and output terminal, and forward end is connected with the output terminal of amplifier P1, the polarity-inverting amplifier P2 that backward end is then connected with the positive pole of electric capacity C2 forms, while the base stage of described triode VT1 is connected with the positive pole of electric capacity C1, its emitter is then connected with the positive pole of amplifier P1, ground connection, its collector are then connected with the negative pole of amplifier P1.
4. the test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering according to claim 3, it is characterized in that: described constant-current source circuit is by triode VT2, triode VT3, and the resistance R4 that one end is connected with the base stage of triode VT2, the other end is then connected with the emitter of triode VT2 after resistance R6 through resistance R5 in turn forms; The base stage of described triode VT2 is connected with the collector of triode VT3, its collector is then connected with the negative pole of amplifier P1, its emitter is then connected with the emitter of triode VT3; The base stage of described triode VT3 is then connected with the tie point of resistance R3 with resistance R2; The tie point of described resistance R4 and resistance R5 connects 5V voltage.
5. the test rotating speed automatic adjustment Motor Measuring System based on bandpass filtering according to claim 4, is characterized in that: described triode VT1, triode VT2 and triode VT3 all adopt NPN type triode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510818745.3A CN105277884A (en) | 2015-11-21 | 2015-11-21 | Testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510818745.3A CN105277884A (en) | 2015-11-21 | 2015-11-21 | Testing rotating speed automatic adjustment type motor test system on the basis of band-pass filtering |
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| CN105277884A true CN105277884A (en) | 2016-01-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255732A (en) * | 2017-06-09 | 2017-10-17 | 四川新川航空仪器有限责任公司 | Measure the tachometric survey circuit of magnetic tachometer sensor signal |
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| CN101247104A (en) * | 2008-03-27 | 2008-08-20 | 无锡市飞象电子有限公司 | Conjecture method of stator magnetic linkage oriented AC motor rotation velocity and rotor position |
| CN101509498A (en) * | 2009-03-18 | 2009-08-19 | 东芝兴仪控制***（西安）有限公司 | Method for optimizing operating parameter of frequency control drive system of direct air cooling blower fan |
| CN104808146A (en) * | 2015-05-06 | 2015-07-29 | 成都诚邦动力测试仪器有限公司 | High-accuracy motor testing system |
| CN104880229A (en) * | 2015-04-13 | 2015-09-02 | 成都诚邦动力测试仪器有限公司 | Low-pass filtering based engine fuel consumption detection system |
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2015
- 2015-11-21 CN CN201510818745.3A patent/CN105277884A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247104A (en) * | 2008-03-27 | 2008-08-20 | 无锡市飞象电子有限公司 | Conjecture method of stator magnetic linkage oriented AC motor rotation velocity and rotor position |
| CN101509498A (en) * | 2009-03-18 | 2009-08-19 | 东芝兴仪控制***（西安）有限公司 | Method for optimizing operating parameter of frequency control drive system of direct air cooling blower fan |
| CN104880229A (en) * | 2015-04-13 | 2015-09-02 | 成都诚邦动力测试仪器有限公司 | Low-pass filtering based engine fuel consumption detection system |
| CN104808146A (en) * | 2015-05-06 | 2015-07-29 | 成都诚邦动力测试仪器有限公司 | High-accuracy motor testing system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107255732A (en) * | 2017-06-09 | 2017-10-17 | 四川新川航空仪器有限责任公司 | Measure the tachometric survey circuit of magnetic tachometer sensor signal |
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Application publication date: 20160127 |
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