CN204903060U - Non -contact motor power consumption measuring device - Google Patents
Non -contact motor power consumption measuring device Download PDFInfo
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- CN204903060U CN204903060U CN201520332854.XU CN201520332854U CN204903060U CN 204903060 U CN204903060 U CN 204903060U CN 201520332854 U CN201520332854 U CN 201520332854U CN 204903060 U CN204903060 U CN 204903060U
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Abstract
The utility model discloses a non -contact motor power consumption measuring device, include: rotational speed measuring device, moment of torsion measuring device, stator voltage electric current measuring device, controller and monitoring device. The utility model provides a first input cost of non -contact motor power consumption measuring device and method is lower, and the flexibility is strong, and the installation of being convenient for is changed, and the power measurement precision is high. Measurement because of utilizing the wireless technology to make the motor also can realize the power of motor under the normal production state has improved production efficiency greatly, brings bigger income for the manufacturing enterprise.
Description
Technical field
The utility model relates to a kind of contactless power of motor loss measurement device.
Background technology
In enterprise's production era of modern develop rapidly, people have more and more higher requirement to production efficiency, not only require outside efficient plant equipment, and also requirement can carry out control measurement to production run in real time simultaneously, be convenient to the real-time control to production run, thus make production more efficient.When motor is put into production central, to the rotating speed of motor, torque, the isoparametric real-time monitoring of power to important role of enhancing productivity.
First, in technology in the past, measure the parameter such as rotating speed, torque, power of motor, normally used method to make motor stop, under the state of producing, measuring relevant parameter respectively by rotation-speed measuring device, torque measuring device, dynamometer machine.This method can not be used in motor normal bringing onto load production work process, so just reduces the efficiency of production to a great extent.Moreover, for the big scale production equipment being not easy to remove stage makeup and costume, adopt said method not only to have labor intensive material resources, the feature of operability difference, and very likely can damage production equipment, reduce the serviceable life of production equipment.From productivity effect, this method is infeasible.
Again, monitoring technique is the inexorable trend of modern enterprise production development.Only production requirement is met to plant equipment in traditional mode of production, have ignored to the real-time monitoring of production run and the pattern of control no longer applicable.Traditional production model, often occurs that heavy-duty motor drags the situation of little load, substantially increase production cost, and motor works long hours under underload situation, reduces production efficiency.Therefore, to the real-time monitoring of production run be modern enterprise produce inevitable requirement.And the control that will realize production run, just must by a set of real-time monitoring system be made up of host computer and slave computer well, measurement mechanism by measuring the correlation parameter of motor, then is transferred to host computer display, thus reaches the object of monitoring in real time.So just, production structure can be optimized according to production requirement, make maximizing the benefits.
Utility model content
The utility model provides a kind of contactless power of motor loss measurement device, by measuring the correlation parameter of motor, then is transferred to host computer display, thus reaches the object of monitoring in real time.The utility model adopts following technical scheme in order to achieve the above object:
A kind of contactless power of motor loss measurement device, comprising:
Rotation-speed measuring device, for the number of teeth at motor run duration prototype gear, and converts TTL signal to, then obtains rotating speed amount after treatment;
Torque-measuring apparatus, for measuring Spindle rotation angle degree at motor run duration, and converts electric signal to and carries out amplifying and filtering, then adjust through A/D conversion, thus obtain moment of torsion digital quantity;
Stator voltage current measuring device, for detecting the input voltage of described motor run duration input end, input current and active power;
Controller, described controller is connected with described rotation-speed measuring device and described stator voltage current measuring device, and is connected with described torque-measuring apparatus by wireless module;
Supervising device, described supervising device is connected with described controller, rotating speed amount, moment of torsion digital quantity, input voltage, input current, active power, power factor (PF), power input, output power, power attenuation and speed discrepancy are shown in real time, and form output according to the control strategy determined in advance, directly act on production run.
Preferably, described rotation-speed measuring device comprises the photoelectric sensor and microprocessor that are connected, wherein said photoelectric sensor is measured the number of teeth of drive motor in operation process to obtain TTL signal, and described microprocessor is used for described TTL signal transacting to obtain rotating speed amount.
Preferably, described torque-measuring apparatus comprises the elastic shaft, measuring bridge, amplification filtering module, the A/D modular converter that connect successively, and elastic shaft is connected with electric machine main shaft, after elastic shaft produces microdeformation by moment of torsion, cause bridge resistance to change, the change transitions of strain bridge resistance is the change of electric signal, by amplifying and filtering faint electric signal, then adjust through A/D conversion, thus realize real-time torque measurement.
Preferably, described wireless module comprises the first pseudo-code device, wireless transmitting terminals, wireless interface receiving end and the second pseudo-code device, the moment of torsion digital quantity that described torque-measuring apparatus inputs by wherein said first pseudo-code device carries out arrangement encryption, make it as coded signal, wireless transmitting terminals sends after being adjusted by coded signal high frequency, after wireless receiving end receiving enciphered signals, input to the second pseudo-code device and carry out decoding process, the signal obtained of decoding delivers to described controller again, and finally shows at described supervising device.
Preferably, described stator voltage current measuring device comprises the voltage current transformer be electrically connected with input end of motor, and for measuring the power meter of active power.
The first input cost of contactless power of motor loss measurement device that the utility model provides is lower, and dirigibility is strong, is convenient to install change, and Accuracy of Power Measurement is high.Because utilizing wireless technology to make motor also can realize the measurement of power of motor under normal production status, substantially increase production efficiency, for manufacturing enterprise brings larger income.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is the utility model embodiment theory diagram;
Fig. 2 is the utility model embodiment wireless module theory diagram.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model with illustrative examples of the present utility model and explanation at this, but not as to restriction of the present utility model.
Embodiment:
As shown in Figure 1, 2, a kind of contactless power of motor loss measurement device, comprising:
Rotation-speed measuring device, for the number of teeth at motor run duration prototype gear, and converts TTL signal to, then obtains rotating speed amount after treatment;
Torque-measuring apparatus, for measuring Spindle rotation angle degree at motor run duration, and converts electric signal to and carries out amplifying and filtering, then adjust through A/D conversion, thus obtain moment of torsion digital quantity;
Stator voltage current measuring device, for detecting the input voltage of described motor run duration input end, input current and active power;
Controller 5, described controller 5 is connected with described rotation-speed measuring device and described stator voltage current measuring device, and is connected with described torque-measuring apparatus by wireless module;
Supervising device 6, described supervising device 6 is connected with described controller 5, rotating speed amount, moment of torsion digital quantity, input voltage, input current, active power, power factor (PF), power input, output power, power attenuation and speed discrepancy are shown in real time, and form output according to the control strategy determined in advance, directly act on production run.
As the part preferred version in above-described embodiment scheme, described rotation-speed measuring device comprises the photoelectric sensor 11 and microprocessor 12 that are connected, in wherein said photoelectric sensor 11 pairs of operation process, the number of teeth of drive motor is measured to obtain TTL signal, and described microprocessor 12 is for obtaining rotating speed amount by described TTL signal transacting.Measuring motor speed has mechanical type, electric, photo-electric several.Mechanical type is more simple, but precision is lower.Electric is divided into generator-type, electric vortex type etc., and precision is higher, but produces electromagnetic resistance square, brings larger systematic error to the measurement of torque.It is utilize photovoltaic principals to detect rotating speed that photoelectric figure formula detects, its linear good, advantage such as resolving power is high, the scope that tests the speed is large, antijamming capability is strong, and can not cause damage to motor output torque.
Measuring principle formula is:
In formula: n is rotating speed (r/min); N is counted pulse number by the sampling time; T is sampling time (min); The pulse number (i.e. the number of teeth of testing gears) that m often rotates a circle produced for motor gear.By single-chip microcomputer sampling period in reprogramming and change m, the measurement of rotating speed requirement of different measuring object can be met
As the part preferred version in above-described embodiment scheme, described torque-measuring apparatus comprises the elastic shaft 21, measuring bridge 22, amplification filtering module 23, the A/D modular converter 24 that connect successively, and elastic shaft 21 is connected with electric machine main shaft, after elastic shaft 21 produces microdeformation by moment of torsion, cause bridge resistance to change, the change transitions of strain bridge resistance is the change of electric signal, by amplifying and filtering faint electric signal, adjust through A/D conversion again, thus realize real-time torque measurement.The measurement of torque, can be divided into TRANSFER METHOD, balance force method and Conversion of Energy method.Balance force method be by the additional known torque contrary with tested torque direction, when transmission shaft is static or uniform rotation time, impressed torque is equal with tested torque.This method is simple, but must measure additional torque or power and the arm of force by another method, can introduce certain cumulative errors like this to measuring.Conversion of Energy method is the principle indirect inspection torque by utilizing energy conservation, not easily realizes.TRANSFER METHOD is by tested transmission of torque on flexible member, measures the method for torque according to the change of flexible member physical parameter.The parameter of change can be distortion, stress or strain etc. (more easily measure owing to straining comparatively distortion, stress, adopt Strain Method here), and the flexible member of use turns round axle.The strain produced can cause the change of the resistance strain gage resistance being attached to surface and form strain type torque transducer.When electric machine main shaft rotates, transmit torque to and turn round on axle, turn round the strain that axle produces, convert corresponding electric signal to by the resistance strain gage of torque sensor, this signal shows torque numerical value by sending display after process.This sensor is easy to use, and precision is high, is easy to integrated.
As the part preferred version in above-described embodiment scheme, described wireless module comprises the first pseudo-code device 31, wireless transmitting terminals 32, wireless interface receiving end 33 and the second pseudo-code device 34, the moment of torsion digital quantity that described torque-measuring apparatus inputs by wherein said first pseudo-code device 31 carries out arrangement encryption, make it as coded signal, wireless transmitting terminals 32 sends after being adjusted by coded signal high frequency, after wireless interface receiving end 33 receiving enciphered signals, input to the second pseudo-code device 34 and carry out decoding process, the signal obtained of decoding delivers to described controller 5 again, and finally show at described supervising device 6.Affected by environment comparatively large in data transmission procedure, by can data precision be improved to data encryption.
As the part preferred version in above-described embodiment scheme, described stator voltage current measuring device comprises the voltage current transformer 41 be electrically connected with input end of motor, and for measuring the power meter 42 of active power.Measure the input voltage of input end with voltage current transformer 41, electric current, measure active power, according to formula with power meter 42: S=I ' U tries to achieve applied power S.According to formula:
try to achieve power factor,
try to achieve reactive power.The measurement of power factor and reactive power has great significance to motor production efficiency.Power factor reflects the degree that is used effectively of applied power that power supply exports, we desirably power factor be the bigger the better.So just, make reactive power drop to minimum, applied power major part is used for supplying active power, thus improves the power of electric energy conveying.For asynchronous motor, reactive power consumption accounts for 60% ~ 70%, and time unloaded, the idle of consumption accounts for again 60% ~ 70% of total reactive power consumption of asynchronous motor.Therefore, prevent the no-load running of motor and improve the power factor that load factor can improve asynchronous motor as far as possible.
The utility model embodiment is originally a set of contactless real time motor measurement mechanism, have employed photoelectric sensor 11 and measures rotating speed method, utilizes foil gauge torque sensor measure torque method, radio data encryption treatment technology and utilize interfacing to realize host computer and the slave computer means of communication.This measurement mechanism can be arranged in the rotating shaft of motor, and when motor normally works, photoelectric sensor 11 goes out corresponding umber of pulse in sampling time inside counting, measures rotating speed amount.The foil gauge be arranged in rotating shaft passes through the change of the change transitions electric signal of strain bridge resistance, then through A/D conversion, data encryption process, measures torque capacity.Rotating speed amount and torque capacity are sent to microprocessor 12 place, after microprocessor 12 pairs of torque capacity decryption processing, calculate power of motor according to certain algorithm, be sent to host computer display, realize the real-time monitoring of electric power.Meanwhile, Information procession is carried out on the basis detected, formed according to the control strategy determined in advance and export, directly act on production run, thus achieve remote monitoring.By means of remote monitoring, the Information Network of enterprises and Controling network can be coupled together effectively, to the assurance at any time of production, traffic-operating period, thus realize the comprehensive automation of enterprise.
Utilization correlation formula is as follows:
Power input
Output power
Power attenuation △ P=P
1-P
2;
Revolutional slip
Contactless power of motor loss measurement method in above-described embodiment scheme, comprises the following steps:
The number of teeth of drive motor in operation process is measured to obtain TTL signal, described TTL signal transacting is obtained rotating speed amount;
Tested transmission of torque on flexible member, is measured torque according to the change of flexible member physical parameter thus obtains moment of torsion digital quantity by employing TRANSFER METHOD;
Obtain input voltage, input current at input end of motor by electric current and voltage mutual inductance, and measure active power;
Rotating speed amount, moment of torsion digital quantity, input voltage, input current and active power are calculated, obtains power factor (PF), power input, output power, power attenuation and speed discrepancy;
Rotating speed amount, moment of torsion digital quantity, input voltage, input current, active power and power factor (PF), power input, output power, power attenuation and speed discrepancy are shown in real time.
As the improvement in above-described embodiment scheme, further comprising the steps of:
According to rotating speed amount, moment of torsion digital quantity, input voltage, input current, active power and power factor (PF), power input, output power, power attenuation and speed discrepancy, formed with the control strategy determined in advance and export, directly act on production run.
As the improvement in above-described embodiment scheme, also comprise the encrypted transmission step of moment of torsion digital quantity:
The sampling frequency of moment of torsion digital quantity is identical with the beat frequency of pseudo-code generator, or keeps the relation of integer multiple, when keeping digital signal identical with the start-phase of pseudo-code signal simultaneously, is multiplied, obtains coded signal after being multiplied at digital multiplier;
Coded signal high frequency is adjusted, carries out high-frequency emission;
Produce identical code length, pattern is acquisition decoded signal and the pseudo-code signal of phase alignment is multiplied with the coded signal of transmitting.
Above the technical scheme that the utility model embodiment provides is described in detail, apply specific case herein to set forth the principle of the utility model embodiment and embodiment, the explanation of above embodiment is only applicable to the principle helping to understand the utility model embodiment; Meanwhile, for one of ordinary skill in the art, according to the utility model embodiment, embodiment and range of application all will change, and in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. a contactless power of motor loss measurement device, is characterized in that comprising:
Rotation-speed measuring device, for the number of teeth at motor run duration prototype gear, and converts TTL signal to, then obtains rotating speed amount after treatment;
Torque-measuring apparatus, for measuring Spindle rotation angle degree at motor run duration, and converts electric signal to and carries out amplifying and filtering, then adjust through A/D conversion, thus obtain moment of torsion digital quantity;
Stator voltage current measuring device, for detecting the input voltage of described motor run duration input end, input current and active power;
Controller, described controller is connected with described rotation-speed measuring device and described stator voltage current measuring device, and is connected with described torque-measuring apparatus by wireless module;
Supervising device, described supervising device is connected with described controller, rotating speed amount, moment of torsion digital quantity, input voltage, input current, active power, power factor (PF), power input, output power, power attenuation and speed discrepancy are shown in real time, and form output according to the control strategy determined in advance, directly act on production run.
2. contactless power of motor loss measurement device as claimed in claim 1, is characterized in that:
Described rotation-speed measuring device comprises the photoelectric sensor and microprocessor that are connected, wherein said photoelectric sensor is measured the number of teeth of drive motor in operation process to obtain TTL signal, and described microprocessor is used for described TTL signal transacting to obtain rotating speed amount.
3. contactless power of motor loss measurement device as claimed in claim 1, is characterized in that:
Described torque-measuring apparatus comprises the elastic shaft, measuring bridge, amplification filtering module, the A/D modular converter that connect successively, and elastic shaft is connected with electric machine main shaft, after elastic shaft produces microdeformation by moment of torsion, cause bridge resistance to change, the change transitions of strain bridge resistance is the change of electric signal, by amplifying and filtering faint electric signal, adjust through A/D conversion again, thus realize real-time torque measurement.
4. contactless power of motor loss measurement device as claimed in claim 1, is characterized in that:
Described wireless module comprises the first pseudo-code device, wireless transmitting terminals, wireless interface receiving end and the second pseudo-code device, the moment of torsion digital quantity that described torque-measuring apparatus inputs by wherein said first pseudo-code device carries out arrangement encryption, make it as coded signal, wireless transmitting terminals sends after being adjusted by coded signal high frequency, after wireless receiving end receiving enciphered signals, input to the second pseudo-code device and carry out decoding process, the signal obtained of decoding delivers to described controller again, and finally shows at described supervising device.
5. contactless power of motor loss measurement device as claimed in claim 1, is characterized in that:
Described stator voltage current measuring device comprises the voltage current transformer be electrically connected with input end of motor, and for measuring the power meter of active power.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520332854.XU CN204903060U (en) | 2015-05-21 | 2015-05-21 | Non -contact motor power consumption measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819794A (en) * | 2015-05-21 | 2015-08-05 | 广州大学 | Non-contact type motor power loss measurement device and method |
| CN108426665A (en) * | 2018-05-15 | 2018-08-21 | 中国工程物理研究院激光聚变研究中心 | The abrasion of grinding wheel on-line monitoring and warning device measured in real time based on grinding resistance square |
-
2015
- 2015-05-21 CN CN201520332854.XU patent/CN204903060U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819794A (en) * | 2015-05-21 | 2015-08-05 | 广州大学 | Non-contact type motor power loss measurement device and method |
| CN108426665A (en) * | 2018-05-15 | 2018-08-21 | 中国工程物理研究院激光聚变研究中心 | The abrasion of grinding wheel on-line monitoring and warning device measured in real time based on grinding resistance square |
| CN108426665B (en) * | 2018-05-15 | 2023-05-16 | 中国工程物理研究院激光聚变研究中心 | Grinding wheel abrasion on-line monitoring and alarming device based on grinding resistance moment real-time measurement |
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Granted publication date: 20151223 Termination date: 20210521 |
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| CF01 | Termination of patent right due to non-payment of annual fee |