CN204731595U - The online failure monitoring device of a kind of submersible electric motor - Google Patents
The online failure monitoring device of a kind of submersible electric motor Download PDFInfo
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- CN204731595U CN204731595U CN201520411332.9U CN201520411332U CN204731595U CN 204731595 U CN204731595 U CN 204731595U CN 201520411332 U CN201520411332 U CN 201520411332U CN 204731595 U CN204731595 U CN 204731595U
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- electric motor
- submersible electric
- failure monitoring
- acquisition circuit
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Abstract
The utility model relates to DSP monitoring and control technology, be specifically related to the online failure monitoring device of a kind of submersible electric motor, comprise: signal acquisition circuit, power module, signal conditioning circuit, A/D converter, digital signal processing unit, RS485 communication interface, EPROM and host computer, described signal acquisition circuit sends through signal conditioning circuit the signal collected to A/D converter, the wavelet noise process to digital signal is completed again through described digital signal processing unit, digital signal data through denoising Processing both can be stored in described EPROM, also host computer can be sent to by described RS485 communication interface.The utility model makes the submersible electric motor signal of collection accurate by unique circuit design, safety, solves traditional submersible electric motor and detects the inconvenient problem of maintenance.
Description
Technical field
The utility model relates to DSP monitoring and control technology, is specifically related to the online failure monitoring device of a kind of submersible electric motor.
Background technology
Submersible electric motor is mainly used in: submersible electric motor and pump combinationally use, or by submersible electric motor axle stretch end directly load onto pump part form pump unify product.Slip in mine water or rivers, lake, in ocean water and work in other occasion water.Have that volume is little, lightweight, prestart does not need diversion, by the degree system of suction, do not need separately to establish pump house, easy to install, dependable performance, efficiency are higher, cheap, can the advantage such as investment reduction, be widely used in fetching water from down-hole or rivers, lake, agricultural irrigation, urban water supply, industrial and mining enterprises' draining, urban and rural buildings draining, resident living water, city or plant effuent filth disposal etc.
Submersible electric motor is usually operated in rugged environment, be in for a long time run up and on-load continuous duty under.Therefore, submersible electric motor ratio is easier to break down in stator, rotor etc., and these faults of generation probably can burn out motor, if motor has damaged, normal operation has also just suspended.Want to avoid earlier such situation to occur, carry out continual monitoring to submersible electric motor operation conditions exactly, namely develop the online failure monitoring system of submersible electric motor, the failure monitoring system realizing submersible electric motor comprises two parts: hardware and software.Have inside hardware design: the power supply of supply arrangement running and peripheral pick-up unit, the sensor group gathering unlike signal, those core processors processed signal also have some to control the part of initialization, between the components responsible signal transmission.Because submersible electric motor works in water, periodic maintenance is not too convenient, so will realize from correction maintenance, scheduled maintenance to the transformation of State Maintenance.Introduce the online failure monitoring device of a kind of submersible electric motor herein, the power by digital signal processor realizes on-line monitoring submersible electric motor fault.
Utility model content
For prior art Problems existing, the utility model provides the online failure monitoring device of a kind of submersible electric motor, solves traditional submersible electric motor ratio and is easier to break down in stator, rotor etc., and fault can not get the problem detected in time.
For solving above technical matters, the utility model is achieved by the following technical programs:
The online failure monitoring device of a kind of submersible electric motor, comprise: signal acquisition circuit, power module, signal conditioning circuit, A/D converter, digital signal processing unit, RS485 communication interface, EPROM and host computer, described signal acquisition circuit sends through signal conditioning circuit the signal collected to A/D converter, the wavelet noise process to digital signal is completed again through described digital signal processing unit, digital signal data through denoising Processing both can be stored in described EPROM, also can be sent to host computer by described RS485 communication interface.
Preferably, described signal acquisition circuit comprises: current signal Acquisition Circuit, voltage signal acquisition circuit and vibration signals collecting circuit.
Preferably, described current signal Acquisition Circuit comprises the current transformer that model is SCT254FK, and specified output is 2.5mA, and precision can reach 0.1%.
Preferably, described vibration signals collecting circuit comprises the linear optical coupling device and feedback capacity that model is IL300-F-X009.
Beneficial effect:
The utility model provides the online failure monitoring device of a kind of submersible electric motor, current transformer SCT254FK is selected to gather current signal, current sampling circuit and outside forceful electric power signal is made to have carried out effective isolation, and can with current protection locking each other, improve the sensitivity of protective device action; Signal conditioning circuit design considers the factor interference such as higher hamonic wave, interference, aliasing, and the standard analog signal amount after process is delivered to analog to digital converter; Linear optical coupling device (IL300-F-X009), for analog voltage isolation, in order to accurately transfer die analog signal, detects voltage, feedback capacity, can stress release treatment interference, makes circuit more stable; Signal processing unit is decomposed at many levels by analysis method of wavelet packet after the data of collection are carried out filtering process, makes the characteristic fault amount of extraction more accurate.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the present embodiment system hardware block diagram;
Fig. 2 is current signal sample circuit in the present embodiment;
Fig. 3 is vibration signal sample circuit in the present embodiment.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1:
As shown in Figure 1, the online failure monitoring device of a kind of submersible electric motor, comprise: signal acquisition circuit, power module, signal conditioning circuit, A/D converter, digital signal processing unit, RS485 communication interface, EPROM and host computer, signal acquisition circuit sends through signal conditioning circuit the signal collected to A/D converter, the wavelet noise process to digital signal is completed again through digital signal processing unit, digital signal data through denoising Processing both can be stored in described EPROM, also host computer can be sent to by RS485 communication interface, signal acquisition circuit comprises: current signal Acquisition Circuit, voltage signal acquisition circuit and vibration signals collecting circuit, current signal Acquisition Circuit comprises the current transformer that model is SCT254FK, specified output is 2.5mA, precision can reach 0.1%, vibration signals collecting circuit comprises the linear optical coupling device and feedback capacity that model is IL300-F-X009.
Current signal sample circuit as shown in Figure 2, current signal (about 30A) when submersible electric motor runs converts small area analysis signal (about 5A) to through foreign current mutual inductor, model again in supervising device circuit is the current transformer of SCT254FK, specified output is 2.5mA, precision can reach 0.1%, makes current signal sample circuit and outside forceful electric power signal carry out effective isolation.The current signal of input, after SCT254FK, converts the current signal of milliampere level to.Because the current signal gathered is sinusoidal ac signal, containing negative value, must be rised in value to it by level lifting circuit.Voltage signal after conversion, must ensure that amplitude is within the scope of 0 to 3.3V, sends into the A/D converter of DSP.
Vibration signal sample circuit as shown in Figure 3, with the isolation of linear optical coupling device (IL300-F-X009) analog voltage, in order to accurately transfer die analog signal, detects voltage.The importation of buffer circuit is made up of LED, PD1 in IL300-F-X009 and amplifier U9A etc., and output is made up of PD2 and amplifier U9B.Voltage signal is converted to through sampling resistor R39 when the vibration signal gathered is converted to electric current input, LED upper reaches excess current is made after amplifier U9A exports, and the change of input voltage is embodied by the electric current on LED, make it luminous thus electric signal is converted to light signal, being radiated at photodiode PD1 and PD2.Electric capacity C47 is feedback capacity, can disturb by stress release treatment, makes circuit more stable.
Specific works process is: when submersible electric motor runs, the parameter signal of submersible electric motor is converted to electric signal by sensor, dsp system will complete the collection of stator voltage, electric current, vibration simulation signal by high-speed a/d converter, utilize the advantage that the inner EPROM of DSP is larger, can first by gather data temporary storage in EPROM, then by RS485 interface circuit, data are sent to host computer.Owing to containing noise factor in the signal that collector collects, in order to obtain pure signal, the general Wavelet Denoising Technology that adopts carries out wavelet noise process to it.
The utility model provides the online failure monitoring device of a kind of submersible electric motor, voltage, current transformer is selected to gather voltage, current signal, can isolate staff and high-tension apparatus on the one hand, the effect of transformation can be reached on the other hand, obtain normal voltage amount, and can with current protection locking each other, improve the sensitivity of protective device action; Signal conditioning circuit design considers the factor interference such as higher hamonic wave, interference, aliasing, and the standard analog signal amount after process is delivered to analog to digital converter; When carrying out A/D conversion to simulating signal, need certain switching time, within this switching time, utilize sampling hold circuit to keep substantially constant to simulating signal, ensure that the precision of conversion; Signal processing module is decomposed at many levels by analysis method of wavelet packet after the data of collection are carried out filtering process, makes the characteristic fault amount of extraction more accurate.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (4)
1. the online failure monitoring device of submersible electric motor, it is characterized in that, comprise: signal acquisition circuit, power module, signal conditioning circuit, A/D converter, digital signal processing unit, RS485 communication interface, EPROM and host computer, described signal acquisition circuit sends through signal conditioning circuit the signal collected to A/D converter, the wavelet noise process to digital signal is completed again through described digital signal processing unit, digital signal data through denoising Processing both can be stored in described EPROM, also host computer can be sent to by described RS485 communication interface.
2. the online failure monitoring device of submersible electric motor as claimed in claim 1, is characterized in that: described signal acquisition circuit comprises: current signal Acquisition Circuit, voltage signal acquisition circuit and vibration signals collecting circuit.
3. the online failure monitoring device of submersible electric motor as claimed in claim 2, it is characterized in that: described current signal Acquisition Circuit comprises the current transformer that model is SCT254FK, specified output is 2.5mA, and precision can reach 0.1%.
4. the online failure monitoring device of submersible electric motor as claimed in claim 2, is characterized in that: described vibration signals collecting circuit comprises the linear optical coupling device and feedback capacity that model is IL300-F-X009.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520411332.9U CN204731595U (en) | 2015-06-15 | 2015-06-15 | The online failure monitoring device of a kind of submersible electric motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520411332.9U CN204731595U (en) | 2015-06-15 | 2015-06-15 | The online failure monitoring device of a kind of submersible electric motor |
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| CN204731595U true CN204731595U (en) | 2015-10-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124180A (en) * | 2016-07-19 | 2016-11-16 | 苏州迪芬德物联网科技有限公司 | A kind of electrical fault vibration analyzer |
| CN106300264A (en) * | 2016-08-24 | 2017-01-04 | 肖国选 | Submersible motor protector |
| CN106324502A (en) * | 2016-08-22 | 2017-01-11 | 哈尔滨理工大学 | Asynchronous motor fault analysis method based on wavelet |
| CN108879392A (en) * | 2018-07-26 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of 10kV high-pressure immersed electromotor monitoring switching cabinet |
-
2015
- 2015-06-15 CN CN201520411332.9U patent/CN204731595U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124180A (en) * | 2016-07-19 | 2016-11-16 | 苏州迪芬德物联网科技有限公司 | A kind of electrical fault vibration analyzer |
| CN106324502A (en) * | 2016-08-22 | 2017-01-11 | 哈尔滨理工大学 | Asynchronous motor fault analysis method based on wavelet |
| CN106300264A (en) * | 2016-08-24 | 2017-01-04 | 肖国选 | Submersible motor protector |
| CN106300264B (en) * | 2016-08-24 | 2018-09-07 | 肖国选 | Submersible motor protector |
| CN108879392A (en) * | 2018-07-26 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of 10kV high-pressure immersed electromotor monitoring switching cabinet |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20160615 |