CN201408116Y - Condition monitoring device of wind power machine set - Google Patents
Condition monitoring device of wind power machine set Download PDFInfo
- Publication number
- CN201408116Y CN201408116Y CN2009201084282U CN200920108428U CN201408116Y CN 201408116 Y CN201408116 Y CN 201408116Y CN 2009201084282 U CN2009201084282 U CN 2009201084282U CN 200920108428 U CN200920108428 U CN 200920108428U CN 201408116 Y CN201408116 Y CN 201408116Y
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- unit
- wind
- monitoring device
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to a condition monitoring device, in particular to a condition monitoring device applied to a gear case and a bearing of a wind power machine set. The condition monitoring device mainly comprises: an induction module 1, an input module 2, a control memory module 3, a communication module 4, a transmission module 5 and an output module 6. The device can accurately reflectonline monitoring data at real time, check and comprehensively analyze equipment failures through a specially designed condition monitoring software management system of the wind power machine set, and be maintained duly to improve the operating reliability of key parts of the wind power machine set, reduce the risk rate of major incidents and save operating maintenance cost.
Description
Technical field
The utility model relates to a kind of state monitoring apparatus, especially a kind of state monitoring apparatus that is applied to wind-driven generator group wheel box and bearing.
Technical background
The wind power generating set fault is to be produced by gear case and bearing greatly.And present wind power generating set trouble hunting needs the technician under wind power generating set is in stopped status, uses the hand-held on-spot tester to gather the data of monitoring point, overhauls, and causes overhaul efficiency low, the operation and maintenance cost height.
Hence one can see that; existing aerogenerator region of interest service technique; especially at wind-driven generator group wheel box and bearing vibration, under wind power generating set is in stopped status, overhaul, can not reflect gear case and bearing vibration situation under in running order in real time.Therefore, need a kind of instrument that can monitor the state at blower fan gear case and bearing vibration position, to realize real-time monitoring to wind-driven generator group wheel box and bearing vibration.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of wind-powered electricity generation set state monitoring device.
The wind-powered electricity generation set state monitoring device that the utility model provides comprises:
In the above-mentioned functions module, it is characterized in that described induction module 1 comprises:
This shows that induction module 1 can be realized gathering vibration information and rotary speed information simultaneously, and in gatherer process, the collection of two kinds of information is not disturbed mutually.
In the above-mentioned functions module, it is characterized in that described load module 2 comprises:
Mould is gone into unit 21, is used for the information that vibration transducer 11 is gathered is nursed one's health and changed;
Open into unit 22, be used for the information that speed probe 12 is gathered is carried out format conversion.
This shows that load module 2 can be realized handling the information of gathering simultaneously, and in processing procedure, two kinds of information processings are not disturbed mutually.
In the above-mentioned functions module, it is characterized in that described control store module 3 comprises:
A/D converting unit 33, the conversion of signals that is used for 2 outputs of mould load module is a digital signal;
CPU (central processing unit) 32 is used for the numeral of 31 buffer memorys of storage unit is handled, calculated;
D/A converting unit 34 is used for the digital signal after CPU (central processing unit) 32 processing is converted to simulating signal;
This shows that control store module 3 can realize the conversion of A/D or D/A signal, and can handle, calculate, finally judge the state of this information, produce corresponding control signal in view of the above input information.
In the above-mentioned functions module, it is characterized in that described communication module 4 comprises:
This shows that communication module 4 can be realized carrying out communication fast and accurately with other described state monitoring apparatus or computing machine.
In the above-mentioned functions module, it is characterized in that described output module 6 comprises:
Leave unit 61, be used for carrying out the output of different switching value signal according to the different control signals after communication module 4 format conversion;
This shows, output module 6 realizes exporting simultaneously multiple different alerting signal, the LED lamp that both can pass through the different colours of display unit 62 shows different alarm condition, also can report to the police with warning devices such as control hummers by leaving unit 61 output different switching value signals.
In the above-mentioned functions module, it is characterized in that described communication module 4 further comprises:
Control signal converting unit 42 is used for the control signal that control store module 3 generates is carried out format conversion.
This shows that control signal converting unit 42 can realize that the control signal with control store module 3 converts to and leave the signal that unit 61 can be discerned.
In the above-mentioned functions module, it is characterized in that described transport module 5 comprises:
RS485 port 52 is used for the signal after communication module 4 packings is carried out local high speed data transfer.
This shows that transport module 5 can be realized the high, low speed data transmission of local signal.
In the above-mentioned functions module, it is characterized in that described RS232 port 51 is or/and RS485 port 52 comprises transient overvoltage holding circuit and optically coupled isolation circuit.
This shows that RS232 port 51 suppresses system noise effectively or/and RS485 port 52 can be reduced or remitted the impact of transient overvoltage to described state monitoring apparatus, and can realize advantages such as port responses speed is fast, the life-span is long.
Description of drawings
Fig. 1 is a system construction drawing of the present utility model;
Fig. 2 is control store module CPU of the present utility model and feed circuit thereof;
Fig. 3 is a control store module clock circuit of the present utility model;
Fig. 4 is communication module serial ports 232 circuit of the present utility model;
Fig. 5 is communication module serial ports 232 overvoltage protection circuit of the present utility model;
Fig. 6 is communication module serial ports 485 circuit of the present utility model;
Fig. 7 is communication module serial ports 485 overvoltage protection circuit of the present utility model;
Fig. 8 goes into the cell input signal modulate circuit for mould of the present utility model;
Fig. 9 is a display unit of the present utility model.
Embodiment
The wind-powered electricity generation set state monitoring device that the utility model as shown in Figure 1 provides mainly comprises: induction module 1, load module 2, control store module 3, communication module 4, transport module 5 and output module 6.
Data and external unit switching value conversion of signals that load module 2 is used for induction module 1 is gathered are that the form that control store module 3 is discerned is transferred to control store module 3.Wherein, load module 2 is gone into unit 21 by mould and is opened into unit 22 and form.Mould is gone into unit 21 and is used to receive analog electrical signal from the vibration of vibration transducer 11, and carries out the conditionings such as filtering of analog electrical signal.Open into unit 22 and be used for receiving key amount signal, in this example for the tach signal that receives speed probe 12 and isolate (as by the light isolation technology) back as input.
Principle of work to the wind-powered electricity generation set state monitoring device that provides of the present utility model is introduced below.
When vibrating mass vibrates on the direction of measurement of vibration transducer 11 sensitivities of induction module 1, the corresponding forced vibration of vibration magnet steel of vibration transducer 11 inside, the sensitive element that is installed in vibration magnet steel next door can vibrate the changes of magnetic field that causes by inductive magnetic steel, and this non-electrical quantities that will measure converts analog electrical signal to, i.e. the alternating voltage signal.
The speed probe 12 of induction module 1 also is converted to time variant voltage signal with the tach signal of gathering.Speed probe 12 can adopt the projection-type photoelectric sensor, and in the present embodiment, the reading dial of projection-type photoelectric sensor has 61 slits that the interval is identical with measuring disk.Measuring disk is rotated with testee, and revolution is crossed a slit, and the light on from the light source projects to the light activated element produces a light and shade to be changed, and light activated element is the output current pulse signal.Within a certain period of time signal-count is become and to measure the tachometer value of rotating shaft, and this non-electrical quantities that will measure converts analog electrical signal to, be i.e. the alternating voltage signal
Be illustrated in figure 8 as the signal conditioning circuit that the mould of load module 2 is gone into unit 21, mould is gone into unit 21 and is collected 8 road vibration signals from vibration transducer 11 in the present embodiment, and adopting the preamplifier state of AD620 as small-signal (i.e. 8 road vibration signals), the small-signal degree of distortion after AD620 amplifies is very little.Adopt the single amplifier of OP07 high precision further to amplify again.OP07 has low noise characteristics, can suppress the input noise of analog electrical signal, and this makes noise fainter concerning small-signal.Thereby, can filter out useful signal easily.
Opening into the 2 road tach signals of unit 22 collections from speed probe 12 of load module 2, and switch amount signal 0 or 1 employing light-coupled isolation, anti-stop signal is disturbed.
Above-mentioned signal after mould is gone into unit 21 and opened unit 22 conditionings through linear rectification circuit, converts sine wave signal to direct current signal by after the capacitive coupling.
As shown in Figure 2, present embodiment control store module 3 integrated 16 road A/D and 4 road D/A functions comprises the embedded type CPU chip, and 32 fixed point high speed numerical processor--DSP F2812 of 128k * 16 a FLASH storage unit.
In the present embodiment, the simulating signal by after higher level's load module 2 conditioning enters storage unit 31, and becomes digital signal by the analog signal conversion that A/D converting unit 33 will be imported storage unit 31.
Next, carrying out sampling by CPU (central processing unit) 32 calculates.For example, can use in the present embodiment as Downsapling method, because voltage signal and sensor position are linear, be that (x is the testee shift offset to y=kx+b, y is the voltage signal of sensor in x position correspondence, and k is a slope, and b is an intercept), so the peak-to-peak value of voltage signal (difference of crest and trough) is directly proportional with the displacement peak-to-peak value of axial oscillations, scale-up factor is k.Can the peak-to-peak value of voltage signal be converted to the displacement peak-to-peak value of testee axial vibration according to known coefficient k thus.Output current signal, switching value signal etc. then.
Subsequently, by the sampling result of calculation signal of D/A converting unit 34 with CPU (central processing unit) 32, promptly digital voltage signal is converted to analog voltage signal.Then carry out logic determines, judge whether displacement peak-to-peak value size surpasses high alarm setting, and this example is unit with mm, if do not transfinite, just removes alerting signal by logic judgment unit 35; If transfinite, then generate alerting signal.
Then, the data processing unit 41 of communication module 4 will be from the analog signal data of control memory module 3 according to specific protocol (as the 101 agreements) processing of packing, and control signal converting unit 42 converts the analog signal data that receives to control signal that transport module 5 and output module 6 can be discerned.
On the other hand, output module 6 receives the signal that sends from communication module 4, and it leaves the action that unit 61 switches on or cuts off the power supply according to the control signal after wherein changing.For example, leave unit 61 employings and often drive solid-state relay, the output terminal of this solid-state relay is in off-state at ordinary times, control output end closure after the input end of solid-state relay receives closed control signal (high level or low level).At this moment the panalarm (as audible-visual annunciator, hummer etc.) that is connected with the output terminal of solid-state relay electric, send sound and light alarm.
The display unit of output module 6 can be the LED lamp, can produce different alerting signals such as single sudden strain of a muscle, two sudden strains of a muscle according to the difference of control signal, and for example, the single sudden strain of a muscle represented generally to overflow, and two sudden strains of a muscle are represented seriously to overflow.Certainly the LED lamp also can be set to a plurality of, different colours, difformity etc. as required.
Below, be example in conjunction with monitoring again to wind-driven generator group wheel box and bearing vibration, further introduce principle of work of the present utility model:
Induction module 1 is according to the displacement of the measured bearing rotating speed in conjunction with this bearing, produce with measured bearing between the corresponding signal of distance, load module 2 changes into direct current signal with this current signal and filters, and sends control store module 3 then to; Simultaneously, if the user need revise correlation parameter (delay time, high alarm setting and existing linear dimensions k and b), then can import by the computing machine that is connected to this monitoring device, these parameters also are sent to control store module 3 subsequently, the analog signal conversion that control store module 3 is sent into load module 2 wherein is a digital signal, be the parameter of computing machine input simultaneously with original parameter update, calculate the peak-to-peak value of unit interval then and be converted into the displacement peak-to-peak value of measured bearing axial vibration, again digital signal is converted to simulating signal, and then sending its logic judgment unit 35 to, the high alarm setting that the displacement peak-to-peak value that calculates and user are set is relatively; When surpassing high alarm setting, then control store module 3 is outwards sent alerting signal, the processing of packing of 41 pairs of transmission of data processing unit by communication module 4 data, control signal converting unit 42 converts the alerting signal that receives to control signal that output module 6 can be discerned, and carries out data transmission by RS232, the RS485 port of transport module 5; Output module 6 leave unit 61 according to the action of switching on or cutting off the power supply by the control signal after control signal converting unit 42 conversions of communication module, and then control panalarm (as audible-visual annunciator, hummer etc.) electric, send sound and light alarm; The LED lamp of the display unit 62 of output module 6 then can produce different alerting signals such as single sudden strain of a muscle, two sudden strains of a muscle according to the difference of control signal.
Wind-powered electricity generation set state monitoring device of the present utility model can reflect wind-powered electricity generation office key member in time, accurately, as the instant situation of group gear case and bearing.The user can carry out in good time maintenance, maintenance to wind-powered electricity generation unit critical component according to Monitoring Data, improves the operational reliability of wind-powered electricity generation unit critical component.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention.Within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a wind-powered electricity generation set state monitoring device is characterized in that, comprising:
Induction module (1) is used to gather the wind-powered electricity generation unit bearing of being monitored and the vibration information and the rotary speed information of gearbox parts;
Load module (2) is used for the information that induction module (1) is gathered is carried out format conversion;
Control store module (3) is used for the data after load module (2) format conversion are carried out calculation process, and the output control signal;
Communication module (4) is used for and will handles from the control signal of control memory module (3);
Output module (6) is used for according to the control signal generation display message after communication module (4) processing and generates as the signal of switching value exporting.
2. wind-powered electricity generation set state monitoring device according to claim 1 is characterized in that, described induction module (1) comprising:
Vibration transducer (11) is used to gather the vibration information of wind-powered electricity generation unit bearing and gearbox parts;
Speed probe (12) is used to gather the rotary speed information of wind-powered electricity generation unit bearing and gearbox parts;
3. wind-powered electricity generation set state monitoring device according to claim 1 is characterized in that, described load module (2) comprising:
Mould is gone into unit (21), is used for the information that vibration transducer (11) is gathered is nursed one's health and the form conversion;
Open into unit (22), be used for the information that speed probe (12) is gathered is carried out format conversion;
4. wind-powered electricity generation set state monitoring device according to claim 1 is characterized in that, described control store module (3) comprising:
A/D converting unit (33), the conversion of signals that is used for mould load module (2) output is a digital signal;
Storage unit (31) is used for the digital signal after buffer memory A/D converting unit (33) is changed;
CPU (central processing unit) (32) is used for the digital signal of storage unit (31) institute buffer memory is handled, calculated;
D/A converting unit (34) is used for the digital signal after CPU (central processing unit) (32) processing is converted to simulating signal;
Logic judgment unit (35) is used to judge that whether the signal after D/A converting unit (34) conversion surpasses threshold value, and generate control signal in view of the above.
5. wind-powered electricity generation set state monitoring device according to claim 1 is characterized in that, described communication module (4) comprising:
Data processing unit (41) is used for the control signal that control store module 3 generates is carried out conversion process according to certain form;
6. wind-powered electricity generation set state monitoring device according to claim 1 is characterized in that, described output module (6) comprising:
Leave unit (61), be used for generating the output of switching value signal according to the control signal after communication module (4) format conversion;
Display unit (62) is used for showing different alarm condition according to the different control signals after communication module (4) format conversion.
7. wind-powered electricity generation set state monitoring device according to claim 5, it is characterized in that, described communication module (4) further comprises: control signal converting unit (42) is used for control signal that control store module (3) is generated according to the processing of packing of certain agreement;
Described wind-powered electricity generation set state monitoring device further comprises transport module (5), is used for the signal after communication module (4) format conversion is carried out the signal transmission of intercomputer in equipment room and equipment and its LAN (Local Area Network).
8. wind-powered electricity generation set state monitoring device according to claim 7 is characterized in that, described transport module (5) comprising:
RS232 port (51) is used for the local parameter setting;
RS485 port (52) is used for the signal after communication module (4) packing is carried out data transmission.
9. wind-powered electricity generation set state monitoring device according to claim 8 is characterized in that, described RS232 port (51) is or/and RS485 port (52) comprises transient overvoltage holding circuit and optically coupled isolation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201084282U CN201408116Y (en) | 2009-06-02 | 2009-06-02 | Condition monitoring device of wind power machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201084282U CN201408116Y (en) | 2009-06-02 | 2009-06-02 | Condition monitoring device of wind power machine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408116Y true CN201408116Y (en) | 2010-02-17 |
Family
ID=41679053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201084282U Expired - Fee Related CN201408116Y (en) | 2009-06-02 | 2009-06-02 | Condition monitoring device of wind power machine set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408116Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975662A (en) * | 2010-10-21 | 2011-02-16 | 中国电力科学研究院 | Wind generating set load testing system meeting IEC61400-13 standard |
| CN102102629A (en) * | 2011-01-17 | 2011-06-22 | 东南大学 | On-line data acquisition and analysis device of wind generating set |
| CN102778654A (en) * | 2012-07-27 | 2012-11-14 | 广东明阳风电产业集团有限公司 | Detection system and detection method for pitch-variable storage battery of wind generating set |
| CN103182752A (en) * | 2011-12-29 | 2013-07-03 | 镇江市港南电子有限公司 | State monitoring device for silicon wafer cutting equipment |
| CN103430004A (en) * | 2011-03-11 | 2013-12-04 | 赫克斯冈技术中心 | Wear-monitoring of gearbox in power station |
| CN103707428A (en) * | 2013-12-31 | 2014-04-09 | 镇江市港南电子有限公司 | Monitoring device of silicon wafer collection equipment |
| CN103822786A (en) * | 2012-11-16 | 2014-05-28 | 中国水利电力物资有限公司 | Wind turbine generator set mechanical equipment state diagnosis method based on multivariate statistical analysis |
| CN104865860A (en) * | 2014-02-25 | 2015-08-26 | 常州铠甲智能科技有限公司 | Sampling, storing and inquiring method and device of WTGS (Wind Turbine Generator System) state monitoring system |
| CN105548595A (en) * | 2015-12-18 | 2016-05-04 | 河北省电力建设调整试验所 | Rotation speed detection method for different levels of shafts of wind power gear case |
| CN109639483A (en) * | 2018-12-12 | 2019-04-16 | 明阳智慧能源集团股份公司 | A kind of wind power generating set data interchange shared platform and its fault ride-through method |
| CN110108927A (en) * | 2019-04-17 | 2019-08-09 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of gas turbine switching value feedback malfunction elimination method |
| CN110604500A (en) * | 2019-03-19 | 2019-12-24 | 蚌埠学院 | Back of body of bathing of voiced sound suggestion is brushed |
| CN110604387A (en) * | 2019-02-26 | 2019-12-24 | 蚌埠学院 | Pressure detection reminding comb |
| CN111279072A (en) * | 2017-08-28 | 2020-06-12 | 西门子歌美飒可再生能源公司 | Bearing protection arrangement structure |
| CN112798044A (en) * | 2020-12-31 | 2021-05-14 | 西安高电电气设备有限公司 | Remote intelligent monitoring system for transmission chain of wind turbine generator |
-
2009
- 2009-06-02 CN CN2009201084282U patent/CN201408116Y/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975662B (en) * | 2010-10-21 | 2014-02-05 | 中国电力科学研究院 | Wind generating set load testing system meeting IEC61400-13 standard |
| CN101975662A (en) * | 2010-10-21 | 2011-02-16 | 中国电力科学研究院 | Wind generating set load testing system meeting IEC61400-13 standard |
| CN102102629A (en) * | 2011-01-17 | 2011-06-22 | 东南大学 | On-line data acquisition and analysis device of wind generating set |
| CN102102629B (en) * | 2011-01-17 | 2012-10-10 | 东南大学 | On-line data acquisition and analysis device of wind generating set |
| US9915585B2 (en) | 2011-03-11 | 2018-03-13 | Hexagon Technology Center Gmbh | Wear-monitoring of a gearbox in a power station |
| CN103430004A (en) * | 2011-03-11 | 2013-12-04 | 赫克斯冈技术中心 | Wear-monitoring of gearbox in power station |
| CN103182752A (en) * | 2011-12-29 | 2013-07-03 | 镇江市港南电子有限公司 | State monitoring device for silicon wafer cutting equipment |
| CN102778654A (en) * | 2012-07-27 | 2012-11-14 | 广东明阳风电产业集团有限公司 | Detection system and detection method for pitch-variable storage battery of wind generating set |
| CN103822786A (en) * | 2012-11-16 | 2014-05-28 | 中国水利电力物资有限公司 | Wind turbine generator set mechanical equipment state diagnosis method based on multivariate statistical analysis |
| CN103707428A (en) * | 2013-12-31 | 2014-04-09 | 镇江市港南电子有限公司 | Monitoring device of silicon wafer collection equipment |
| CN104865860A (en) * | 2014-02-25 | 2015-08-26 | 常州铠甲智能科技有限公司 | Sampling, storing and inquiring method and device of WTGS (Wind Turbine Generator System) state monitoring system |
| CN105548595A (en) * | 2015-12-18 | 2016-05-04 | 河北省电力建设调整试验所 | Rotation speed detection method for different levels of shafts of wind power gear case |
| CN105548595B (en) * | 2015-12-18 | 2019-04-30 | 国网河北能源技术服务有限公司 | A kind of extraction wind turbine gearbox axis Rotating speed measring methods at different levels |
| CN111279072A (en) * | 2017-08-28 | 2020-06-12 | 西门子歌美飒可再生能源公司 | Bearing protection arrangement structure |
| CN111279072B (en) * | 2017-08-28 | 2023-01-31 | 西门子歌美飒可再生能源公司 | Bearing protection arrangement structure |
| US11585326B2 (en) | 2017-08-28 | 2023-02-21 | Siemens Gamesa Renewable Energy A/S | Bearing protection arrangement |
| CN109639483A (en) * | 2018-12-12 | 2019-04-16 | 明阳智慧能源集团股份公司 | A kind of wind power generating set data interchange shared platform and its fault ride-through method |
| CN109639483B (en) * | 2018-12-12 | 2021-07-30 | 明阳智慧能源集团股份公司 | Wind driven generator group data intercommunication sharing platform and fault ride-through method thereof |
| CN110604387A (en) * | 2019-02-26 | 2019-12-24 | 蚌埠学院 | Pressure detection reminding comb |
| CN110604500A (en) * | 2019-03-19 | 2019-12-24 | 蚌埠学院 | Back of body of bathing of voiced sound suggestion is brushed |
| CN110108927A (en) * | 2019-04-17 | 2019-08-09 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of gas turbine switching value feedback malfunction elimination method |
| CN110108927B (en) * | 2019-04-17 | 2021-10-15 | 中国船舶重工集团公司第七O三研究所无锡分部 | Method for troubleshooting switching value feedback fault of gas turbine |
| CN112798044A (en) * | 2020-12-31 | 2021-05-14 | 西安高电电气设备有限公司 | Remote intelligent monitoring system for transmission chain of wind turbine generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201408116Y (en) | Condition monitoring device of wind power machine set | |
| CN102748214B (en) | Wind generation set state monitoring and fault diagnosis system coupled to control system | |
| CN202645849U (en) | Wind turbine generator state monitoring and fault diagnosing system coupled with control system | |
| CN208950762U (en) | A kind of hydraulic turbine health state evaluation system | |
| CN107082253B (en) | Belt feeder operation monitoring system and its method | |
| CN104716741A (en) | Transformer substation remote monitoring system and method | |
| CN201666248U (en) | Natural gas compressor state detection and failure predication system | |
| CN102798786A (en) | Universal intelligent lightning protection monitoring module and method | |
| CN104760887B (en) | Harbor lifting machinery operation safety machine-mounted early warning system | |
| CN203673317U (en) | Fan condition monitoring system | |
| CN202210709U (en) | Distribution transformer real time monitoring system | |
| CN201984122U (en) | Transformer synthesis and intelligent assessment device | |
| CN101408465A (en) | Method for on-line monitoring conversion resistance force of switch machine | |
| CN202794300U (en) | Online monitoring device of power transmission line lightening arrester | |
| CN102116174A (en) | System for monitoring pressure of paste-filling pipeline on line | |
| CN202661863U (en) | Remote monitoring system for reliability test | |
| CN202599441U (en) | System for acquiring state data of power transformer | |
| CN201963360U (en) | Pressure online monitoring system for paste-filling pipeline | |
| CN209230776U (en) | A kind of rotating machinery monitoring protection and vibration analysis combination instrument | |
| CN202534150U (en) | Wind generation set vibration data uploading device | |
| CN202916243U (en) | Bus duct operating condition real-time wireless monitoring system | |
| CN202329804U (en) | Online monitoring system for vibration of auxiliary engine of generator | |
| CN202065118U (en) | Intelligent water turbine revolving speed signal device | |
| CN201413334Y (en) | Rotating speed module | |
| CN201237835Y (en) | Wireless network detection system of mine large electromechanical device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20100217 Termination date: 20170602 |