CN105487010A - Bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently - Google Patents
Bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently Download PDFInfo
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- CN105487010A CN105487010A CN201510815363.5A CN201510815363A CN105487010A CN 105487010 A CN105487010 A CN 105487010A CN 201510815363 A CN201510815363 A CN 201510815363A CN 105487010 A CN105487010 A CN 105487010A
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- amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently. The system is characterized by comprising a single-chip microcomputer, a frequency variable motor control unit, an output display unit, an operation unit, a bandpass filtering unit, an analog-digital conversion unit, a rotating speed signal collection unit, a tested motor, a frequency variable motor and a power supply, wherein the frequency variable motor control unit, the output display unit, the operation unit and the bandpass filtering unit are connected to the single-chip microcomputer, the analog-digital conversion unit is connected with the bandpass filtering unit, the rotating speed signal collection unit is connected with the analog-digital conversion unit, the tested motor is connected with the rotating speed signal collection unit, the frequency variable motor is connected with the tested motor, and the power supply is connected with the frequency variable motor. The motor test system is provided with the bandpass filtering unit which can filter interference signals in rotating speed signals and prevent the interference signals from influencing the rotating speed signals and further influencing a test result of the tested motor.
Description
Technical field
The present invention relates to a kind of Motor Measuring System, specifically refer to a kind of efficient 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 is not to high by the efficiency of the tach signal process of measured motor, this have impact on the efficiency of electromechanical testing 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 efficient 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 efficient 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 AD conversion unit be connected with bandpass filtering unit, the tach signal collecting unit be connected with AD conversion 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 AD conversion unit is by amplifier P2, amplifier P3, triode VT4, triode VT5, one end is connected with the positive pole of amplifier P2, the other end is then as the resistance R8 of the input end of this AD conversion unit, one end is connected with the negative pole of amplifier P2, the other end is the resistance R9 of ground connection after resistance R12 then, one end is connected with the output terminal of amplifier P2, the resistance R10 that the other end is then connected with the tie point of resistance R12 with resistance R9, be serially connected in the resistance R11 between the output terminal of amplifier P2 and the negative pole of amplifier P3, positive pole is connected with the negative pole of amplifier P3, the electric capacity C2 that negative pole is then connected with the base stage of triode VT5, be serially connected in the resistance R13 between the output terminal of amplifier P3 and the base stage of triode VT4, one end is connected with the collector of triode VT4, the resistance R14 of other end ground connection, and one end is connected with the collector of triode VT4, the resistance R15 that the other end then forms the output terminal of this AD conversion unit forms, the plus earth of described amplifier P3, the emitter of described triode VT5 is connected with the emitter of triode VT4, its grounded collector, the input end of described AD conversion unit is connected with the output terminal of tach signal collecting unit, its output terminal is then connected with the input end of bandpass filtering unit.
Described bandpass filtering unit is by amplifier P4, amplifier P5, triode VT6, negative pole is connected with the positive pole of amplifier P4 after electric capacity C3, positive pole then forms the electric capacity C8 of the input end of this bandpass filtering unit, one end is connected with the positive pole of amplifier P4, the resistance R16 of ground connection while the other end is then connected with the base stage of triode VT6, one end is connected with the negative pole of electric capacity C8, the resistance R17 that the other end is then connected with the output terminal of amplifier P4, be serially connected in the resistance R18 between the output terminal of amplifier P4 and the positive pole of amplifier P5, be serially connected in the electric capacity C7 between the positive pole of amplifier P5 and output terminal, positive pole is connected with the positive pole of amplifier P5, the electric capacity C6 of minus earth, positive pole is connected with the positive pole of amplifier P4, 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 P4 connects 5V voltage, its output terminal is then all connected with the emitter of triode VT6 with negative pole, the grounded collector of described triode VT6, the output terminal of described amplifier P5 then formed this bandpass filtering unit output terminal its be 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 then forms the output terminal of this tach signal collecting unit 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 AD conversion unit, and its efficiency changed tach signal is very high, therefore can improve the testing efficiency of motor, saves the test duration.
(4) 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 AD conversion unit of the present invention.
Fig. 4 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, efficient 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 AD conversion unit be connected with bandpass filtering unit, the tach signal collecting unit be connected with AD conversion 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.AD conversion unit is then for converting digital signal to the tach signal collected.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 the input end of AD conversion 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, it is by amplifier P2, amplifier P3, triode VT4, triode VT5, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14 for the structure of described AD conversion unit, and resistance R15 and electric capacity C2 forms.
During connection, one end of resistance R8 is connected with the positive pole of amplifier P2, its other end is then as the input end of this AD conversion unit, one end of resistance R9 is connected with the negative pole of amplifier P2, its other end is ground connection after resistance R12 then, one end of resistance R10 is connected with the output terminal of amplifier P2, its other end is then connected with the tie point of resistance R12 with resistance R9, resistance R11 is then serially connected between the output terminal of amplifier P2 and the negative pole of amplifier P3, the positive pole of electric capacity C2 is connected with the negative pole of amplifier P3, its negative pole is then connected with the base stage of triode VT5, resistance R13 is then serially connected between the output terminal of amplifier P3 and the base stage of triode VT4, one end of resistance R14 is connected with the collector of triode VT4, its other end ground connection, one end of resistance R15 is connected with the collector of triode VT4, its other end then formed this AD conversion unit output terminal its be connected with the input end of bandpass filtering unit.The plus earth of described amplifier P3; The emitter of described triode VT5 is connected with the emitter of triode VT4, its grounded collector.
As shown in Figure 4, this bandpass filtering unit is by amplifier P4, and amplifier P5, triode VT6, resistance R16, resistance R17, resistance R18, electric capacity C3, electric capacity C4, polar capacitor C5, electric capacity C6, electric capacity C7 and electric capacity C8 form.
During connection, the negative pole of electric capacity C8 is connected with the positive pole of amplifier P4 after electric capacity C3, its positive pole then forms the input end of this bandpass filtering unit, one end of resistance R16 is connected with the positive pole of amplifier P4, ground connection while its other end is then connected with the base stage of triode VT6, one end of resistance R17 is connected with the negative pole of electric capacity C8, its other end is then connected with the output terminal of amplifier P4, resistance R18 is then serially connected between the output terminal of amplifier P4 and the positive pole of amplifier P5, between the positive pole that electric capacity C7 is serially connected in amplifier P5 and output terminal, the positive pole of electric capacity C6 is connected with the positive pole of amplifier P5, its minus earth, the positive pole of electric capacity C4 is connected with the positive pole of amplifier P4, its minus earth, polar capacitor C5 is then in parallel with electric capacity C4.The positive pole of described amplifier P4 connects 5V voltage, and it is powered for giving this bandpass filtering unit, and the output terminal of this amplifier P4 is then all connected with the emitter of triode VT6 with negative pole.The grounded collector of described triode VT6; The output terminal of described amplifier P5 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 efficient 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 AD conversion unit be connected with bandpass filtering unit, the tach signal collecting unit be connected with AD conversion 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 AD conversion unit is by amplifier P2, amplifier P3, triode VT4, triode VT5, one end is connected with the positive pole of amplifier P2, the other end is then as the resistance R8 of the input end of this AD conversion unit, one end is connected with the negative pole of amplifier P2, the other end is the resistance R9 of ground connection after resistance R12 then, one end is connected with the output terminal of amplifier P2, the resistance R10 that the other end is then connected with the tie point of resistance R12 with resistance R9, be serially connected in the resistance R11 between the output terminal of amplifier P2 and the negative pole of amplifier P3, positive pole is connected with the negative pole of amplifier P3, the electric capacity C2 that negative pole is then connected with the base stage of triode VT5, be serially connected in the resistance R13 between the output terminal of amplifier P3 and the base stage of triode VT4, one end is connected with the collector of triode VT4, the resistance R14 of other end ground connection, and one end is connected with the collector of triode VT4, the resistance R15 that the other end then forms the output terminal of this AD conversion unit forms, the plus earth of described amplifier P3, the emitter of described triode VT5 is connected with the emitter of triode VT4, its grounded collector, the input end of described AD conversion unit is connected with the output terminal of tach signal collecting unit, its output terminal is then connected with the input end of bandpass filtering unit,
Described bandpass filtering unit is by amplifier P4, amplifier P5, triode VT6, negative pole is connected with the positive pole of amplifier P4 after electric capacity C3, positive pole then forms the electric capacity C8 of the input end of this bandpass filtering unit, one end is connected with the positive pole of amplifier P4, the resistance R16 of ground connection while the other end is then connected with the base stage of triode VT6, one end is connected with the negative pole of electric capacity C8, the resistance R17 that the other end is then connected with the output terminal of amplifier P4, be serially connected in the resistance R18 between the output terminal of amplifier P4 and the positive pole of amplifier P5, be serially connected in the electric capacity C7 between the positive pole of amplifier P5 and output terminal, positive pole is connected with the positive pole of amplifier P5, the electric capacity C6 of minus earth, positive pole is connected with the positive pole of amplifier P4, 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 P4 connects 5V voltage, its output terminal is then all connected with the emitter of triode VT6 with negative pole, the grounded collector of described triode VT6, the output terminal of described amplifier P5 then formed this bandpass filtering unit output terminal its be connected with single-chip microcomputer.
2. the efficient 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 efficient 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 then forms the output terminal of this tach signal collecting unit 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 efficient 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 efficient 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510815363.5A CN105487010A (en) | 2015-11-21 | 2015-11-21 | Bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510815363.5A CN105487010A (en) | 2015-11-21 | 2015-11-21 | Bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently |
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| CN105487010A true CN105487010A (en) | 2016-04-13 |
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| CN201510815363.5A Withdrawn CN105487010A (en) | 2015-11-21 | 2015-11-21 | Bandpass filtering based automatic adjusting type motor test system capable of testing rotating speed efficiently |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101105520A (en) * | 2007-08-08 | 2008-01-16 | 陕西电力科学研究院 | Generating set primary frequency regulation test method and emulating instrument for test |
| CN101187693A (en) * | 2007-11-26 | 2008-05-28 | 天津理工大学 | Motor performance automatic test system based on dummy instrument and its working method |
| CN104792382A (en) * | 2015-04-13 | 2015-07-22 | 成都诚邦动力测试仪器有限公司 | Engine oil consumption detecting system based on four-order low-pass filtering processing |
| 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 |
| CN104865400A (en) * | 2015-04-14 | 2015-08-26 | 华北电力大学 | Method and system for detecting and identifying rotating speed of wind power generation set |
-
2015
- 2015-11-21 CN CN201510815363.5A patent/CN105487010A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105520A (en) * | 2007-08-08 | 2008-01-16 | 陕西电力科学研究院 | Generating set primary frequency regulation test method and emulating instrument for test |
| CN101187693A (en) * | 2007-11-26 | 2008-05-28 | 天津理工大学 | Motor performance automatic test system based on dummy instrument and its working method |
| CN104792382A (en) * | 2015-04-13 | 2015-07-22 | 成都诚邦动力测试仪器有限公司 | Engine oil consumption detecting system based on four-order low-pass filtering processing |
| CN104865400A (en) * | 2015-04-14 | 2015-08-26 | 华北电力大学 | Method and system for detecting and identifying rotating speed of wind power generation set |
| 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 |
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Application publication date: 20160413 |