CN205594139U - Motor temperature rise and vibration monitoring devices - Google Patents
Motor temperature rise and vibration monitoring devices Download PDFInfo
- Publication number
- CN205594139U CN205594139U CN201620439967.4U CN201620439967U CN205594139U CN 205594139 U CN205594139 U CN 205594139U CN 201620439967 U CN201620439967 U CN 201620439967U CN 205594139 U CN205594139 U CN 205594139U
- Authority
- CN
- China
- Prior art keywords
- motor
- temperature rise
- vibration
- temperature
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a motor temperature rise and vibration monitoring devices has solved the monitoring of current monitoring devices motor vibration and has had the not comprehensive scheduling problem of defect, monitoring data. This motor temperature rise and vibration monitoring devices including microprocessor, is responsible for the receipt and the processing of data message, power supply processing module is for device operation power supply, motor electric current collection module, the voltage signal who becomes the gained current switchover of current transformer gathers and alternaties, motor vibration and temperature rise collection module gather motor vibration and temperature data information, man -machine interaction module for realize human -computer interaction, communication data transmission module reaches detecting system in the monitoring circumstances with the motor. The utility model discloses having the current detection function, can transshipping unusually to the motor, the temperature rise is unusual, the monitoring of abnormal vibration omnidirectional.
Description
Technical field
This utility model relates to a kind of monitoring device based on motor operating state, specifically, relates to a kind of motor
Temperature rise and vibration monitoring device.
Background technology
As it is shown in figure 1, in prior art, the monitoring device of motor operating state mainly comprises power pack, man-machine interaction
Part, motor temperature and vibration monitoring part and communication data transmission.Wherein, power pack is used for providing electric energy, man-machine interaction
Part is used for realizing man-machine interaction, and motor temperature and vibration monitoring part use vibrating sensor and temperature sensor, and device
Must install at the shell of motor, the vibration information of motor transmits along with the vibration with device, enters into vibrating sensor；Temperature
Sensor is for the skin temperature of measurement apparatus, and the installation because device and motor housing contact, so the temperature of motor watchcase
Temperature sensor can be delivered to.Temperature sensor measurement goes out the skin temperature of motor.
The operation principle of existing monitoring device is as follows: after device powers on, and user is passed by man machine interface or communication data
Defeated, set the parameter of motor, device is by being arranged on the shell of motor, and device can pass through vibrating sensing by the shell of self
Device obtains the data of motor oscillating.Motor housing temperature conduction obtains motor temperature by temperature sensor on crust of the device.
Microprocessor compares motor oscillating the most extremely by comparing the parameter of electric machine of user setup, and motor housing temperature is the most different
Often.Then abnormal information can be sent to monitoring system by communication network and be shown to man machine interface, user if it occur that abnormal
Abnormal vibration or temperature anomaly according to motor decide whether maintenance down.
The major defect of existing monitoring device is as follows: motor oscillating monitoring existing defects, vibration when motor overload and startup
Can automatically strengthen, it is judged that unreliable information；Can only single-point monitoring motor running temperature, it is impossible to monitoring motor temperature rise situation,
Therefore, it is impossible to alarm too high to motor temperature rise.
Utility model content
The purpose of this utility model is to solve the problem existing for prior art, it is provided that a kind of simple in construction, realization side
Just motor temperature rise and vibration monitoring device.
To achieve these goals, this utility model is by the following technical solutions:
A kind of motor temperature rise and vibration monitoring device, including:
Microprocessor, is responsible for reception and the process of data message；
Power supply processing module, powers for plant running；
Current of electric acquisition module, the voltage signal that the electric current obtained by current transformer is converted into is acquired and becomes
Change；
Motor oscillating and temperature rise acquisition module, gather motor oscillating and temperature data information；
Human-computer interaction module, is used for realizing man-machine interaction；
Communication data transport module, is uploaded to detecting system by the monitoring situation of motor.
By above-mentioned technological means, current of electric is used to judge running status and the vibrational state of motor, meanwhile, can be complete
The absolute temperature of face detection motor is the most too high, temperature rise is the most too high, motor overload, goes out the different of motor according to result comprehensive diagnos
Often state.
Further, described power supply processing module includes that rectifier bridge and induction coil take can process circuit, can obtain by box from taking
The electric energy obtained first passes through rectifier bridge and is rectified into DC voltage, then takes via induction coil and can process circuit conversion.By upper
State technological means, dangerous without electric leakage electric shock, improve the work safety degree of device.
Further, described power supply processing module also bag linear power supply LDO, described linear power supply LDO are at described power supply
The output of reason module.By above-mentioned technological means, improve the stability of electric current output.
Further, described current of electric acquisition module includes operational amplifier, low pass filter and analog-digital converter；Electricity
Pressure signal is by, after the following of described operational amplifier, entering described low pass filter, enter back into described analog-digital converter, described
Analog-digital converter outputs signal to described microprocessor.By above-mentioned technological means, utilize and gather current system differentiation motor fortune
Row state, result is accurate.
Further, the environment temperature of ambient temperature when described motor oscillating and temperature rise acquisition module include gathering motor work
Degree sensor, and vibration temperature sensor；A described vibration temperature at least it is separately installed with at the rotary shaft of motor head and the tail
Degree sensor；Described motor oscillating exports to described microprocessor with the collection data of temperature rise acquisition module.By above-mentioned technology
Means, on the one hand combine collection current system and differentiate that motor operating state carrys out comprehensive descision abnormal vibration, make judgement motor abnormality
More conform to motor self character, it is judged that more reliable, more meet motor actual motion characteristic；On the other hand, the two of motor is gathered
Side shaft is gentle to be gathered motor operating ambient temperature, is possible not only to the running temperature abnormal conditions of motor are entered monitoring, also
The temperaturing lifting abnormality situation of motor can be monitored.
Further, described human-computer interaction module uses OLED screen curtain.By above-mentioned technological means, expand man-machine interaction
The operating temperature of module, improves its service life.
Further, described communication data transport module includes RF wireless communication circuit and/or RS485 communicating circuit.
By above-mentioned technological means so that the transmission of motor Monitoring Data is more flexible, it is achieved more convenient.
Compared with prior art, this utility model has the advantages that
(1) this utility model application uses and comprehensively sentences by the way of gathering current of electric and identifying motor operating state
The abnormal vibration situation of power machine, judges more accurately motor oscillating is abnormal and more conforms to motor oscillating abnormality detection mark
Accurate.
(2) temperature of motor is judged more rationally by this utility model application, except judging the absolute temperature of motor both sides axle head
Being outside one's consideration, the axle temperature calculating both sides also by collection ambient temperature rises situation, motor is run temperature rise and running temperature is all entered
Go and monitored and judge, thus overcome the incomplete problem of monitoring information that prior art exists.
(3) this utility model uses the power supply mode work of complete electromagnetic isolation, does not exist and is joined directly together with forceful electric power loop,
This power supply mode is safe and reliable, there is not electric leakage and electric shock risk.
(4) this utility model data communication and support wireless data communication support again RS485 cable data communication, Ke Yigen
Use environments to select flexibly communication modes according to motor, take into full account the working condition that motor is on-the-spot.
(5) this utility model has current sense function, can be abnormal to motor overload, temperaturing lifting abnormality, abnormal vibration side entirely
The monitoring of position.
Accompanying drawing explanation
Fig. 1 is the system block diagram of prior art.
Fig. 2 is system block diagram of the present utility model.
Fig. 3 is application mode block diagram of the present utility model.
Fig. 4 is schematic flow sheet of the present utility model.
Fig. 5 is the decision logic schematic diagram of motor operating state in this utility model.
Fig. 6 is the decision logic schematic diagram of motor oscillating state in this utility model.
Fig. 7 is the decision logic schematic diagram of motor temperature rising state in this utility model.
Fig. 8 is the comprehensive descision logical schematic of motor abnormal condition in this utility model.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, and embodiment of the present utility model includes
But it is not limited to the following example.
The terms "and/or", a kind of incidence relation describing affiliated partner, can there are three kinds of passes in expression
System, such as, A and/or B, can represent: individualism A, individualism B, there is tri-kinds of situations of A and B, the terms simultaneously
"/and " it is to describe another kind of affiliated partner relation, two kinds of relations, such as, A/ and B can be there are, can represent: individually deposit in expression
In two kinds of situations of A, individualism A and B, it addition, character "/" herein, typically represent forward-backward correlation and close liking a kind of "or"
System.
Embodiment 1
As shown in Figure 2,3, present embodiments providing a kind of motor temperature rise and vibration monitoring device, it mainly includes five
Point: (a) power supply processes part；(b) current of electric collecting part；(c) man-machine interaction part；(d) communication data hop；
(e) temperature rise and vibration acquisition part.Wherein, power supply processes after part is responsible for processing power supply and powers to plant running, current of electric
The voltage signal that the electric current that collecting part is responsible for being obtained by current transformer is converted into is acquired and converts, man-machine interaction portion
Dividing and be then used for realizing man-machine interaction, temperature rise and vibration acquisition part are responsible for gathering motor oscillating and temperature data information, communication number
It is responsible for the monitoring situation of motor, data are uploaded host computer, detecting system according to hop.The reception of above-mentioned all data and place
Reason is all realized by microprocessor.
The motor temperature rise that the present embodiment is provided and vibration monitoring device exist relative to the distinctive points of prior art:
One, vibration monitoring mode is different
Prior art only judges motor oscillating whether exception by vibration signal, the vibration information of motor along with device
Vibration transmission, enter into vibrating sensor, use this kind of mode, motor overload and when starting vibration can automatically strengthen, it is judged that
Unreliable information；The motor temperature rise that the present embodiment is provided and vibration monitoring device first pass through current of electric to judge motor
Running status, then, combines current of electric and vibration information, comprehensive descision motor on the premise of motor operating state judges
Vibration Condition, thus judges more accurately motor oscillating is abnormal and more conforms to motor oscillating abnormality detection standard.It realizes
Theoretical foundation as follows: the running status of motor has bigger associating with the Vibration Condition of motor, opens if motor is in
Move and in overload, the vibration of motor will be caused greatly due to motor operating current to increased, therefore judge that the vibration of motor is
When no existence is abnormal, can determine vibration early warning according to the running status of motor, it is than the simple vibration relying on motor intrinsic
Value (prior art) carries out judging more accurately and true.
In the present embodiment, it is achieved vibration monitoring has been coordinated with vibration acquisition part from current of electric collecting part and temperature rise
Become.Wherein, current of electric collecting part is current of electric acquisition module, and it includes operational amplifier, low pass filter and modulus
Transducer；By IA, the voltage signal of IB, IC is by, after the following of operational amplifier, entering into low-pass filter circuit, by mutual inductance
High-frequency interferencing signal in device leaches, and then in analog-digital converter (ADC), analog quantity is converted into digital quantity, supplies
Microprocessor gathers and calculates.As it is shown in figure 5, the operation principle of current of electric acquisition module is as follows: mainly by gathering electricity
The operation three-phase current IA of machine, IB, IC are judged the running status of motor, are joined by current of electric and the motor being stored in device
Number compares, and judges motor operating state (in electric motor starting, motor runs, motor overload three kinds) respectively.Specifically, first
First, the three-phase current IA that motor runs, IB, IC are gathered；Secondly, three-phase current amplitude size is calculated by Fourier algorithm；?
After, the parameter of electric machine of three-phase current amplitude with setting or storage is compared, obtains motor operating state according to comparative result.
In the case of motor operating state determines (judgement), for those skilled in the art, it is possible to learn that motor is at this
Every operational factor under running status, at this point it is possible to arrange the motor oscillating that matches according to the running status of motor
Threshold value, i.e. motor oscillating abnormity early warning value.Then, the vibration of motor is detected with vibration acquisition part by temperature rise, temperature
Rising and use temperature rise and vibration acquisition module with vibration acquisition part, it includes the environment temperature of ambient temperature when gathering motor work
Degree sensor, and vibration temperature sensor, wherein, environment temperature sensor and vibration temperature sensor are also applied to motor temperature
In the detection of degree and temperature rise, during motor oscillating detects, the vibration signal of motor is carried out by application vibration temperature sensor
Gather.The sensor is all connected to microprocessor by sensor interface, in the present embodiment, at the rotary shaft of motor head and the tail
At least it is separately installed with a described vibration temperature sensor.As shown in Figure 6, first, motor is set according to motor operating state
Abnormal vibration threshold value；Secondly, read motor oscillating data (vibration temperature sensor), and calculate the vibration velocity of motor；Finally,
Relatively according to comparative result, the vibration velocity of motor and the motor oscillating outlier threshold of setting, judge whether motor oscillating exists different
Often.
The calculating hands that existing single vibration values relying on motor intrinsic carries out judging is instead of by above-mentioned technological means
Section so that motor oscillating is judged more accurate.
Two, motor temperature monitoring
In prior art, temperature sensor is the skin temperature of measurement apparatus, the peace because device and motor housing contact
Dress, so the temperature of motor watchcase can be delivered to temperature sensor, thus, temperature sensor measurement goes out the skin temperature of motor,
Being motor temperature, this kind of mode causes the monitoring of motor temperature not comprehensively, and data are unreasonable, science.The present embodiment is provided
Motor temperature rise and vibration monitoring device, use environment temperature sensor and vibration temperature sensor, wherein, ambient temperature senses
Ambient temperature when device is for detecting motor work, vibration temperature sensor is respectively in the vicinity of motor head and the tail two ends rotary shaft
Respectively it is provided with one, according to actual needs, it is also possible to select installation multiple.As it is shown in fig. 7, two vibration temperature sensors record
The temperature of motor head and the tail power transmission shaft, through calculating the temperature rise at two with the thermometer of motor working environment, head and the tail power transmission shaft simultaneously
Absolute temperature information can record.According to the absolute temperature of head and the tail power transmission shaft, temperature rise situation can go out motor with comprehensive descision
Working, whether absolute temperature is too high or temperature rise is too high.By above-mentioned technological means, except judging the absolute temperature of motor both sides axle head
Be outside one's consideration, rise situation also by the axle temperature gathering ambient temperature and calculating both sides, to the monitoring of motor temperature more rationally, science.
Three, comprehensive descision
Such as Fig. 4, shown in 8, the motor temperature rise that the present embodiment is provided is combined current acquisition with vibration monitoring device, vibration is adopted
Collection and the temperature acquisition abnormal conditions comprehensive descision to motor.Device judges motor electrical operation shape by the electric current of motor
State, can identify whether motor transships, if overload, carries out overload abnormal work alarm；Meanwhile, device is transported by motor
Row state and detect two at vibration information combine, it is judged that whether motor oscillating abnormal, if abnormal, report vibration is different
Often work alarm；Device, by recording the absolute temperature information at ambient temperature and two, can calculate the both sides temperature rise of motor
And absolute temperature, absolute temperature and temperature rise are respectively compared with the absolute temperature tolerance value of motor storage and temperature rise tolerance value,
If it exceeds its tolerance value then reports the too high exception of temperature or temperaturing lifting abnormality.
Embodiment 2
On the basis of embodiment 1, the motor temperature rise that the present embodiment is provided and vibration monitoring device are relative to existing skill
The distinctive points of art also resides in:
Power supply processes
Existing monitoring device point power supply mode includes: a kind of is battery power supply mode, and a kind of civil power AC220V of being inputs
Mode.Battery is powered and is typically used alkaline battery to be powered equipment, when battery electric quantity deficiency, needs to change battery.City
Electricity input uses Switching Power Supply (AC/DC) to be powered device.Battery is powered needs to change battery when energy content of battery deficiency,
And use mains-supplied to there is the defect of electric leakage and Danger Electric shock risk.Motor temperature rise that the present embodiment is provided and vibration monitoring device
Using electromagnetic isolation formula induction energy fetching to power, realized by power supply processing module, described power supply processing module mainly includes rectification
Bridge and induction coil take and can process circuit, and its operation principle is as follows: can first pass through rectifier bridge rectification by the electric energy that acquires of box by taking
Become DC voltage, then take via induction coil and can process circuit conversion and become the voltage required for work.Power supply uses sense completely
Should take and can work, use electromagnetic isolation working method completely, safe and reliable, without any Danger Electric shock risk.Further
In preferred version, induction coil takes and can process circuit employing voltage clamp feedback circuit, when voltage high pressure setting voltage, automatically
Short circuit input.When voltage is reduced to setting value, then cancel short circuit input.So that voltage stabilization is in the range of voltage error.
Simultaneously in order to increase alive stability, add the linear power supply LDO last output as power supply.
Embodiment 3
On the basis of embodiment 1, the motor temperature rise that the present embodiment is provided and vibration monitoring device are relative to existing skill
The distinctive points of art also resides in:
Man-machine interaction part
In prior art, man-machine interaction part uses charactron (LED) mode to show, generally letter or segment encode mode,
Be only able to display general letter and number, and cannot the complex information such as Display of Chinese characters, meanwhile, existing human-computer interaction module is low
Cannot use in the case of temperature.The human-computer interaction module that the present embodiment is provided mainly is made up of button and OLED screen curtain, and OLED is
Use what LED dot matrix constituted to realize screen completely, there is life-span length and the wide feature of operating temperature.User can be by man-machine friendship
Interface arranges the vibration of motor, temperature rise and overload etc. and arranges parameter, at the same time it can also be view the different of motor by OLED mutually
Often warning information, motor operating current, motor temperature rise data etc..
Embodiment 4
On the basis of embodiment 1, the motor temperature rise that the present embodiment is provided and vibration monitoring device are relative to existing skill
The distinctive points of art also resides in
Communication data transmits
Prior art uses single communication transfer mode, it is achieved inconvenience.The motor temperature rise that the present embodiment is provided
Using wireless telecommunications or RS485 communication with the communication data hop of vibration monitoring device, wherein Main Function is by electricity
The running current of machine, vibration data, temperature rise data and motor abnormality stand by lamp information are exported by wireless telecommunications or RS485
To detecting system, user is made to understand the operation conditions of motor in time, it is possible to decide whether to stop according to the abnormal information of motor
Machine overhauling.Mode that this device have employed wireless telecommunications and two kinds of communications of RS485 combine, when motor uses environment to allow (to compare
Open) time, it is possible to use wireless communication technique, carry out data communication with device.When motor use ambient occlusion thing more or
During enclosed environment, then RS485 wire communication mode can be used to carry out data exchange.
The most single embodiment of above-described embodiment 2-4, those skilled in the art are before understanding this utility model application
Put, it is also possible to it is carried out any combination use, as the combination of embodiment 2-4 is constituted a further preferred version, or
Person, combines one further preferred version of composition by embodiment 2 and embodiment 4, or, embodiment 3 and embodiment 4 are combined
Constitute a further preferred version.
According to above-described embodiment, this utility model just can be realized well.What deserves to be explained is, based on above-mentioned design principle
On the premise of, for solving same technical problem, even if make on the basis of structure disclosed in the utility model or method
Some are without substantial change or polishing, and the essence of the technical scheme used is still as this utility model, therefore it also should
When in protection domain of the present utility model.
Claims (7)
1. a motor temperature rise and vibration monitoring device, it is characterised in that including:
Microprocessor, is responsible for reception and the process of data message；
Power supply processing module, powers for plant running；
Current of electric acquisition module, the voltage signal that the electric current obtained by current transformer is converted into is acquired and converts；
Motor oscillating and temperature rise acquisition module, gather motor oscillating and temperature data information；
Human-computer interaction module, is used for realizing man-machine interaction；
Communication data transport module, is uploaded to detecting system by the monitoring situation of motor.
Motor temperature rise the most according to claim 1 and vibration monitoring device, it is characterised in that described power supply processing module bag
Include rectifier bridge and induction coil takes and can process circuit, rectifier bridge can be first passed through be rectified into unidirectional current by the electric energy that acquires of box from taking
Pressure, then takes via induction coil and can process circuit conversion.
Motor temperature rise the most according to claim 2 and vibration monitoring device, it is characterised in that described power supply processing module is also
Bag linear power supply LDO, described linear power supply LDO are the output of described power supply processing module.
Motor temperature rise the most according to claim 1 and vibration monitoring device, it is characterised in that described current of electric gathers mould
Block includes operational amplifier, low pass filter and analog-digital converter；Voltage signal is by, after the following of described operational amplifier, entering
Entering described low pass filter, enter back into described analog-digital converter, described analog-digital converter outputs signal to described microprocessor.
Motor temperature rise the most according to claim 1 and vibration monitoring device, it is characterised in that described motor oscillating and temperature rise
The environment temperature sensor of ambient temperature when acquisition module includes gathering motor work, and vibration temperature sensor；At motor
A described vibration temperature sensor at least it is separately installed with at the rotary shaft of head and the tail；Described motor oscillating and temperature rise acquisition module
The output of collection data to described microprocessor.
Motor temperature rise the most according to claim 1 and vibration monitoring device, it is characterised in that described human-computer interaction module is adopted
Use OLED screen curtain.
Motor temperature rise the most according to claim 1 and vibration monitoring device, it is characterised in that described communication data transmission mould
Block includes RF wireless communication circuit and/or RS485 communicating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620439967.4U CN205594139U (en) | 2016-05-16 | 2016-05-16 | Motor temperature rise and vibration monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620439967.4U CN205594139U (en) | 2016-05-16 | 2016-05-16 | Motor temperature rise and vibration monitoring devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205594139U true CN205594139U (en) | 2016-09-21 |
Family
ID=56931962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620439967.4U Active CN205594139U (en) | 2016-05-16 | 2016-05-16 | Motor temperature rise and vibration monitoring devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205594139U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738809A (en) * | 2016-05-16 | 2016-07-06 | 成都慧成智能电气有限公司 | Monitoring device for temperature rise and vibration of motor and realizing method thereof |
| CN107192948A (en) * | 2017-06-08 | 2017-09-22 | 安徽省化工设计院 | A kind of low-tension motor multi-parameter monitoring devices and its running situation evaluation method |
-
2016
- 2016-05-16 CN CN201620439967.4U patent/CN205594139U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738809A (en) * | 2016-05-16 | 2016-07-06 | 成都慧成智能电气有限公司 | Monitoring device for temperature rise and vibration of motor and realizing method thereof |
| CN107192948A (en) * | 2017-06-08 | 2017-09-22 | 安徽省化工设计院 | A kind of low-tension motor multi-parameter monitoring devices and its running situation evaluation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105738809B (en) | A kind of motor temperature rise and vibration monitoring device and its implementation | |
| CN201546759U (en) | ZigBee technology-based underground safety-monitoring system for coal mine | |
| CN109142904B (en) | Image recognition-based fault monitoring method and device for direct-current transmission converter valve | |
| CN104237590B (en) | A kind of active anti-electricity-theft device and the method for strong magnetic stealing compensation measurement | |
| CN104944245A (en) | Elevator state information collecting device | |
| CN203101941U (en) | Fault remote safety monitoring system for oil well pumping unit | |
| CN205594139U (en) | Motor temperature rise and vibration monitoring devices | |
| CN106898259A (en) | A kind of intelligent work board | |
| CN102879050A (en) | Water level and temperature online monitoring system for direct current grounding electrode detection well | |
| CN107055245A (en) | A kind of elevator method of real-time and device | |
| CN205333034U (en) | Transmission line wire arc on -line monitoring system that hangs down | |
| CN206665915U (en) | A kind of elevator operation monitoring system | |
| CN107356804A (en) | A kind of three-phase electricity monitoring for protection circuit and its method of work | |
| CN109116185A (en) | Transmission line online monitoring system based on Beidou communication | |
| CN109520548A (en) | A kind of Multifunction Sensor trouble-shooter | |
| CN103852413B (en) | A kind of airfield aid isolating transformer water erosion monitoring system and control method | |
| CN112782577A (en) | Multi-sense fusion coal mine large motor fault diagnosis system | |
| CN206461436U (en) | Power supply monitoring system | |
| CN204881916U (en) | Cable head temperature real -time supervision and early warning system | |
| CN204778129U (en) | Elevator state information collection system | |
| CN106774195A (en) | Construction safety production supervision management control system | |
| CN207748732U (en) | Staircase band-type brake temperature-detecting device | |
| CN207258942U (en) | Elevator personnel's detection device | |
| CN214278371U (en) | Multi-sense fusion coal mine large motor fault diagnosis system | |
| CN113433924A (en) | Remote diagnosis system and method for medium-frequency electric furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |