CN104215321A - Circuit breaker vibration monitor system and method based on optical fiber sensors - Google Patents
Circuit breaker vibration monitor system and method based on optical fiber sensors Download PDFInfo
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- CN104215321A CN104215321A CN201410488271.6A CN201410488271A CN104215321A CN 104215321 A CN104215321 A CN 104215321A CN 201410488271 A CN201410488271 A CN 201410488271A CN 104215321 A CN104215321 A CN 104215321A
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Abstract
The invention discloses a circuit breaker vibration monitor system based on optical fiber sensors. The circuit breaker vibration monitor system based on the optical fiber sensors comprises a plurality of optical fiber grating vibration sensors installed on a circuit breaker and a switching value detection module installed on an output contactor of the circuit breaker, wherein the optical fiber grating vibration sensors are sequentially connected with an optical fiber grating demodulation instrument, a signal conditioning module and an A/D (analog to digital) conversion module, the A/D conversion module and the switching value detection module are respectively connected with isolation unit modules, and the isolation unit modules are sequentially connected with a digital signal processor and an upper computer. The invention further discloses a monitor method of the circuit breaker vibration monitor system based on the optical fiber sensors. The monitor method of the circuit breaker vibration monitor system based on the optical fiber sensors includes steps: installing the optical fiber grating vibration sensors on multiple positions of the circuit breaker, collecting vibration signals of the circuit breaker, then processing the signals, transmitting the signals to the upper computer, and thereby confirming the optimum installation positions of the optical fiber grating vibration sensors and achieving machinery status monitoring for the circuit breaker. The circuit breaker vibration monitor system and the circuit breaker vibration monitor method based on the optical fiber sensors achieve real time vibration monitoring for the circuit breaker in running.
Description
Technical field
The invention belongs to electrical equipment online supervision method and technology field, relate to a kind of isolating switch vibration monitor system based on Fibre Optical Sensor, the invention still further relates to the monitoring method of above-mentioned isolating switch vibration monitor system.
Background technology
Isolating switch is the visual plant of electric system, and its mechanical fault can form great threat to system cloud gray model, and causes serious economic loss.In order to ensure the safe operation of isolating switch and the reliability of raising Operation of Electric Systems, must strengthen carrying out vibration monitoring to it.
Along with reaching its maturity of computer technology, sensing technology, field bus technique and artificial intelligence, possibility is become to isolating switch vibration monitoring.The vibration signal of isolating switch contains abundant machine performance information, vibration signal monitoring is a kind of monitoring method of non-intrusion type, do not affect the inner structure of equipment and normal operation, vibration signal is utilized to carry out detection and diagnosis to breaker mechanical state, can find in advance and trouble saving, be the effective means judging machine performance.
Traditional isolating switch vibration monitoring method mainly carries out vibration monitoring by piezoelectric acceleration transducer to isolating switch three-phase contactor end place, according to the waveform situation of host computer display, thus determines the machine performance of isolating switch.Although can real-time monitor the vibration of isolating switch phase, there is poor anti jamming capability, there is the accumulative problem of integral error in sensor, and the error of actual measurement is comparatively large, and only monitors the vibration signal of a position, and the machine performance of isolating switch can not be described.Optical fiber raster vibration sensor is a kind of electromagnetism interference, highly sensitive and can the sensor of normal table work in the presence of a harsh environment, and it can carry out dynamic monitoring to vibration signal in real time.If apply it to isolating switch on-line monitoring, will be greatly improved in the reliability of its monitoring and precision.
Summary of the invention
The object of the present invention is to provide a kind of isolating switch vibration monitor system based on Fibre Optical Sensor, achieve the object of operating isolating switch being carried out to real-time vibration monitoring.
Another object of the present invention is to the monitoring method that a kind of isolating switch vibration monitor system based on Fibre Optical Sensor is provided.
The first technical scheme of the present invention is, based on the isolating switch vibration monitor system of Fibre Optical Sensor, include the multiple optical fiber raster vibration sensor be installed on isolating switch and the switching value module being installed on isolating switch output contact place, optical fiber raster vibration sensor by signal wire successively with fiber Bragg grating (FBG) demodulator, Signal-regulated kinase and AD conversion module connect, AD conversion module and switching value module are respectively by signal wire and isolated location model calling, isolated location module is connected with digital signal processor by signal wire, digital signal processor is connected with host computer by CAN, Signal-regulated kinase, AD conversion module, switching value module, isolated location module and digital signal processor are all integrated on one piece of printed circuit board.
The feature of the first technical scheme of the present invention is also:
Optical fiber raster vibration sensor is fixed on the surface of the non-live part of Shell of circuit breaker, the surface of the non-live part of Shell of circuit breaker is provided with the rigid base of threaded mounting hole, optical fiber raster vibration sensor mode with bolts is connected with rigid base.
The model of fiber Bragg grating (FBG) demodulator is SR-100-T.
The model of AD conversion module is AD7656.
The model of isolated location module is P781.
The second technical scheme of the present invention is, based on the monitoring method of the isolating switch vibration monitor system of Fibre Optical Sensor, specifically implements according to following steps:
Step 1, the divide-shut brake Vibration Parameter utilizing optical fiber raster vibration sensor to gather isolating switch diverse location change, and obtain the variable quantity of light signal according to the change of divide-shut brake Vibration Parameter;
The optical signal demodulation that multiple optical fiber raster vibration sensors in step 1 collect is become voltage signal by step 2, fiber Bragg grating (FBG) demodulator, and be amplified to the voltage signal of applicable AD conversion, voltage signal after being amplified, its voltage of the voltage signal after amplification is 4.75 ~ 5.25V;
Step 3, utilize the voltage signal of Signal-regulated kinase process after the amplification that step 2 obtains, obtain digital signal; Extracted the position signalling of isolating switch by switching value module simultaneously;
Step 4, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to host computer successively after isolated location module, digital signal processor processes, complete process and the transmission of whole vibration signal;
Step 5, host computer carry out analyzing and processing, in real time display to diverse location divide-shut brake vibration signal and report to the police, and according to the best position of wave form analysis determination optical fiber raster vibration sensor.
The feature of the second technical scheme of the present invention is also:
Step 1.1, multiple optical fiber raster vibration sensor is installed on the non-live part of Shell of circuit breaker respectively, concrete installation method is: at the rigid base of a surface mount threaded mounting hole of the non-live part of Shell of circuit breaker, multiple optical fiber raster vibration sensor is fixed on this base by mode then with bolts;
Step 1.2, the divide-shut brake Vibration Parameter utilizing multiple optical fiber raster vibration sensor to gather isolating switch diverse location change, Vibration Parameter change can cause fiber grating axial strain, cause the change of fiber grating reflection wavelength, the Vibration Parameter change by divide-shut brake is converted into the change of light signal.
Step 3 is specifically implemented according to following steps:
Step 3.1, utilize Signal-regulated kinase by amplify after the filtering of voltage signal medium-high frequency undesired signal, high-frequency interferencing signal refers to that frequency is the undesired signal of more than 20kHz;
Step 3.2, through step 3.1, filtered voltage signal is adjusted to applicable AD sample scope, obtain simulating signal;
Step 3.3, utilize AD conversion module that the simulating signal obtained in step 3.2 is converted to digital signal, extracted the position signalling of isolating switch simultaneously by switching value module.
Step 4 is specifically implemented according to following steps:
Step 4.1, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to isolated location module, obtains the corresponding signal after isolating;
Step 4.2, be delivered to digital signal processor carry out signal transacting by obtaining the corresponding signal after isolating through step 4.1, obtain corresponding phase frequency, amplitude-frequency and harmonic signal;
Step 4.3, the corresponding phase frequency, amplitude-frequency and the harmonic signal that obtain through step 4.2 are transferred to host computer by CAN, complete process and the transmission of whole vibration signal.
Step 10 is concrete to be implemented in accordance with the following methods:
By WAVELET PACKET DECOMPOSITION, set up the state vibration signal that the reconstruct of optimal Decomposition tree is intact, and using the fingerprint signal of the state vibration signal of reconstruct as current use; The greatest coefficient of sensitive nodes is carried out state classification as proper vector input vector machine simultaneously, be used for judging isolating switch current state with this.
Beneficial effect of the present invention is:
1. the present invention is based in the isolating switch vibration monitor system of Fibre Optical Sensor, what collection circuit-breaker switching on-off vibration signal was selected is optical fiber raster vibration sensor, its reason is: optical fiber raster vibration sensor has electromagnetism interference, precision is high, working transmission is large, normally can work in the presence of a harsh environment, can the advantages such as real-time dynamic monitoring be realized.
2. the isolating switch vibration monitor system that the present invention is based on Fibre Optical Sensor can monitor Multi-channel Vibration Signals, and extracts circuit-breaker switching on-off actuating signal simultaneously, thus vibrational waveform when can be clear that on host computer that isolating switch divides/closes.
3. the present invention is based in the isolating switch vibration monitor system of Fibre Optical Sensor and be provided with digital signal processor and host computer, can automatically gather circuit-breaker switching on-off vibration signal, thus achieve the object of intellectual monitoring;
4. the present invention is based on the isolating switch that the isolating switch vibration monitor system of Fibre Optical Sensor and monitoring system are suitable for different electric pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the isolating switch vibration monitor system that the present invention is based on Fibre Optical Sensor;
Fig. 2 is the principle schematic utilizing the isolating switch vibration monitor system that the present invention is based on Fibre Optical Sensor to carry out signal WAVELET PACKET DECOMPOSITION in the process of monitoring;
Fig. 3 is the schematic diagram of the optimal classification surface utilizing the isolating switch vibration monitor system that the present invention is based on Fibre Optical Sensor to obtain.
In figure, 1. optical fiber raster vibration sensor, 2. fiber Bragg grating (FBG) demodulator, 3. Signal-regulated kinase, 4.AD modular converter, 5. isolating switch output contact, 6. switching value module, 7. isolated location module, 8. digital signal processor, 9. host computer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention is based on the isolating switch vibration monitor system of Fibre Optical Sensor, its structure as shown in Figure 1, include the multiple optical fiber raster vibration sensors 1 be installed on isolating switch and the switching value module 6 being installed on isolating switch output contact place, optical fiber raster vibration sensor 1 by signal wire successively with fiber Bragg grating (FBG) demodulator 2, Signal-regulated kinase 3 and AD conversion module 4 connect, AD conversion module 4 is connected with isolated location module 7 respectively by signal wire with switching value module 6, isolated location module 7 is connected with digital signal processor 8 by signal wire, digital signal processor 8 is connected with host computer 9 by CAN, Signal-regulated kinase 3, AD conversion module 4, switching value module 6, isolated location module 7 and digital signal processor 8 are all integrated on one piece of printed circuit board (PCB).
Optical fiber raster vibration sensor 1 mounting means is: at the rigid base of a surface mount threaded mounting hole of the non-live part of Shell of circuit breaker, optical fiber raster vibration sensor 1 is fixed on this base by mode then with bolts.
The model of fiber Bragg grating (FBG) demodulator 2 is SR-100-T.
Signal-regulated kinase 3 has the effect of signal filtering, amplification, by the high-frequency interferencing signal filtering in the voltage signal of input, is then amplified by voltage signal.
AD conversion module 4 is that simulating signal is converted to digital signal, and its model is AD7656.
Isolation on isolated location module 7 is electric by front and back two parts circuit realiration, prevent interfering with each other between two parts circuit, enhance the antijamming capability of circuit itself, its model is P781.
The model of digital signal processor is TMS320F28335.
The present invention is based on the isolating switch vibration monitor system method of Fibre Optical Sensor, specifically implement according to following steps:
Step 1, the divide-shut brake Vibration Parameter utilizing optical fiber raster vibration sensor 1 to gather isolating switch diverse location change, and obtain the variable quantity of light signal according to the change of divide-shut brake Vibration Parameter;
Step 1.1, multiple optical fiber raster vibration sensor 1 is installed on the non-live part of Shell of circuit breaker respectively, concrete installation method is: at the rigid base of a surface mount threaded mounting hole of the non-live part of Shell of circuit breaker, multiple optical fiber raster vibration sensor 1 is fixed on this base by mode then with bolts;
Step 1.2, the divide-shut brake Vibration Parameter utilizing multiple optical fiber raster vibration sensor 1 to gather isolating switch diverse location change, because Vibration Parameter change can cause fiber grating axial strain, therefore can cause the change of fiber grating reflection wavelength, the Vibration Parameter change by divide-shut brake is converted into the change of light signal;
Wherein, the isolating switch Vibration Parameter change transitions collected is fiber grating axial strain by optical fiber raster vibration sensor 1, when fiber grating axial strain ε changes, according to strain measurement formula: Δ λ
b=(1-p
e) ε λ
b, thus reach according to fiber grating reflected wavelength lambda
bthe object of isolating switch diverse location Vibration Parameter is measured in change.
The optical signal demodulation that multiple optical fiber raster vibration sensors 1 in step 1 collect is become voltage signal by step 2, fiber Bragg grating (FBG) demodulator 2, and be amplified to the voltage signal of applicable AD conversion, voltage signal after being amplified, its voltage of the voltage signal after amplification is 4.75 ~ 5.25V;
Step 3, utilize Signal-regulated kinase 3 to process the voltage signal after the amplification that step 2 obtains, obtain digital signal; Extracted the position signalling of isolating switch simultaneously by switching value module 6, specifically implement according to following steps:
Step 3.1, utilize Signal-regulated kinase 3 by amplify after the filtering of voltage signal medium-high frequency undesired signal, high-frequency interferencing signal refers to that frequency is the undesired signal of more than 20kHz;
Step 3.2, through step 3.1, filtered voltage signal is adjusted to applicable AD sample scope, obtain simulating signal;
Step 3.3, utilize AD conversion module 4 that the simulating signal obtained in step 3.2 is converted to digital signal, extracted the position signalling of isolating switch simultaneously by switching value module 6.
Step 4, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to host computer 9 through isolated location module 7, digital signal processor 8 after processing successively, completes process and the transmission of whole vibration signal, specifically implement according to following steps:
Step 4.1, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to isolated location module 7, obtains the corresponding signal after isolating; Isolation on isolated location module 7 is electric by front and back two parts circuit realiration, prevents interfering with each other between two parts circuit, enhances the antijamming capability of circuit itself;
Step 4.2, be delivered to digital signal processor 8 carry out signal transacting by obtaining the corresponding signal after isolating through step 4.1, obtain corresponding phase frequency, amplitude-frequency and harmonic signal;
Step 4.3, the corresponding phase frequency, amplitude-frequency and the harmonic signal that obtain through step 4.2 are transferred to host computer 9 by CAN, complete process and the transmission of whole vibration signal.
Step 5, host computer 9 pairs of diverse location divide-shut brake vibration signals carry out analyzing and processing, in real time display and report to the police, and according to the best position of wave form analysis determination optical fiber raster vibration sensor 1, specifically implement in accordance with the following methods:
The method of Circuit breaker vibration signal being carried out to analyzing and processing is: by WAVELET PACKET DECOMPOSITION, sets up the state vibration signal that the reconstruct of optimal Decomposition tree is intact, and using the fingerprint signal of the state vibration signal of reconstruct as current use; The greatest coefficient of sensitive nodes is carried out state classification as proper vector input vector machine simultaneously, be used for judging isolating switch current state with this;
WAVELET PACKET DECOMPOSITION is specifically implemented in accordance with the following methods:
The signal being transferred to host computer 9 after being processed by digital signal processor in step 48 utilizes wavelet packet to decompose, as shown in Figure 2, the detail signal that small echo cannot decompose decomposes by wavelet packet further, original signal S is decomposed into approximate signal and detail signal, successively decompose, the all subband of every one deck is divided into two, and one deck transmission downwards, form a kind of binary tree; Every one deck all covers all frequencies of signal, and the number of plies is more, and frequency domain resolution is higher, and corresponding time frequency resolution is lower;
In WAVELET PACKET DECOMPOSITION, original signal S is by following algorithmic notation:
S＝A1+AD2+AD3+DDD3 (1)；
Utilize algorithm support vector machine, by kernel function, sample is mapped to feature space, linear Optimal Separating Hyperplane is constructed and class interval is maximum in this space, as shown in Figure 3, round dot in figure and side's point represent two class training samples respectively, and H is by the completely errorless sorting track separated of two class samples, and H1, H2 are respectively by being parallel to the straight line of sorting track from the nearest sample of sorting track in sample, be spaced apart class interval between them, in Fig. 3, sample is support vector.
For the problem of linearly inseparable, namely some sample correctly can not be classified by lineoid; Need to add constraint condition to lineoid to retrain, introduce vectorial ε
i>=0, then lineoid constraint condition is:
y
i(w′×x
i+b)+ε＜1 (2)；
In formula (2): w is the normal vector of classifying face, b is threshold values;
For non-linear partition problem, according to functional correlation theory, adopt suitable kernel function K (x
i, x
j) and kernel function meets Mercer condition, can carry out nonlinear transformation, can convert non-linear division to linear partition by nonlinear transformation, now classification function is:
f(x)＝sgn[∑α
iy
iK(x
i,x
j)+b] (3)。
The present invention is based on isolating switch vibration monitor system and the monitoring method of Fibre Optical Sensor, realize carrying out real-time vibration monitoring to operating isolating switch, installing optical fibres grating vibration sensor on multiple positions of isolating switch, gather the vibration signal of isolating switch, then signal is processed, be transferred to host computer, thus the best position that sensor can be determined and the monitoring realized breaker mechanical state.
Claims (10)
1. based on the isolating switch vibration monitor system of Fibre Optical Sensor, it is characterized in that, include the multiple optical fiber raster vibration sensors (1) be installed on isolating switch and the switching value module (6) being installed on isolating switch output contact place, described optical fiber raster vibration sensor (1) by signal wire successively with fiber Bragg grating (FBG) demodulator (2), Signal-regulated kinase (3) and AD conversion module (4) connect, described AD conversion module (4) is connected with isolated location module (7) respectively by signal wire with switching value module (6), described isolated location module (7) is connected with digital signal processor (8) by signal wire, described digital signal processor (8) is connected with host computer (9) by CAN,
Described Signal-regulated kinase (3), AD conversion module (4), switching value module (6), isolated location module (7) and digital signal processor (8) are all integrated on one piece of printed circuit board.
2. the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 1, it is characterized in that, described optical fiber raster vibration sensor (1) is fixed on the surface of the non-live part of Shell of circuit breaker, the surface of the non-live part of Shell of circuit breaker is provided with the rigid base of threaded mounting hole, described optical fiber raster vibration sensor (1) mode with bolts is connected with rigid base.
3. the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 1, is characterized in that, the model of described fiber Bragg grating (FBG) demodulator (2) is SR-100-T.
4. the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 1, is characterized in that, the model of described AD conversion module (4) is AD7656.
5. the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 1, is characterized in that, the model of described isolated location module (7) is P781.
6., as claimed in claim 1 based on a monitoring method for the isolating switch vibration monitor system of Fibre Optical Sensor, it is characterized in that, specifically implement according to following steps:
Step 1, the divide-shut brake Vibration Parameter utilizing optical fiber raster vibration sensor (1) to gather isolating switch diverse location change, and obtain the variable quantity of light signal according to the change of divide-shut brake Vibration Parameter;
The optical signal demodulation that multiple optical fiber raster vibration sensors (1) in step 1 collect is become voltage signal by step 2, fiber Bragg grating (FBG) demodulator (2), and be amplified to the voltage signal of applicable AD conversion, voltage signal after being amplified, its voltage of the voltage signal after amplification is 4.75 ~ 5.25V;
Step 3, utilize Signal-regulated kinase (3) to process voltage signal after the amplification that step 2 obtains, obtain digital signal; Extracted the position signalling of isolating switch by switching value module (6) simultaneously;
Step 4, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to host computer (9) successively after isolated location module (7), digital signal processor (8) process, complete process and the transmission of whole vibration signal;
Step 5, host computer (9) carry out analyzing and processing, in real time display to diverse location divide-shut brake vibration signal and report to the police, and according to the best position of wave form analysis determination optical fiber raster vibration sensor (1).
7. the monitoring method of the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 6, it is characterized in that, described step 1 is specifically implemented according to following steps:
Step 1.1, multiple optical fiber raster vibration sensor (1) is installed on the non-live part of Shell of circuit breaker respectively, concrete installation method is: at the rigid base of a surface mount threaded mounting hole of the non-live part of Shell of circuit breaker, multiple optical fiber raster vibration sensor (1) is fixed on this base by mode then with bolts;
Step 1.2, the divide-shut brake Vibration Parameter utilizing multiple optical fiber raster vibration sensor (1) to gather isolating switch diverse location change, Vibration Parameter change can cause fiber grating axial strain, cause the change of fiber grating reflection wavelength, the Vibration Parameter change by divide-shut brake is converted into the change of light signal.
8. the monitoring method of the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 6, it is characterized in that, described step 3 is specifically implemented according to following steps:
Step 3.1, utilize Signal-regulated kinase (3) by amplify after the filtering of voltage signal medium-high frequency undesired signal, high-frequency interferencing signal refers to that frequency is the undesired signal of more than 20kHz;
Step 3.2, through step 3.1, filtered voltage signal is adjusted to applicable AD sample scope, obtain simulating signal;
Step 3.3, utilize AD conversion module (4) that the simulating signal obtained in step 3.2 is converted to digital signal, extracted the position signalling of isolating switch simultaneously by switching value module (6).
9. the monitoring method of the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 6, it is characterized in that, described step 4 is specifically implemented according to following steps:
Step 4.1, the position signalling of the digital signal obtained through step 3 and isolating switch is delivered to isolated location module (7), obtains the corresponding signal after isolating;
Step 4.2, be delivered to digital signal processor (8) carry out signal transacting by obtaining the corresponding signal after isolating through step 4.1, obtain corresponding phase frequency, amplitude-frequency and harmonic signal;
Step 4.3, the corresponding phase frequency, amplitude-frequency and the harmonic signal that obtain through step 4.2 are transferred to host computer (9) by CAN, complete process and the transmission of whole vibration signal.
10. the monitoring method of the isolating switch vibration monitor system based on Fibre Optical Sensor according to claim 6, is characterized in that, described step 10 is concrete to be implemented in accordance with the following methods:
By WAVELET PACKET DECOMPOSITION, set up the state vibration signal that the reconstruct of optimal Decomposition tree is intact, and using the fingerprint signal of the state vibration signal of reconstruct as current use; The greatest coefficient of sensitive nodes is carried out state classification as proper vector input vector machine simultaneously, be used for judging isolating switch current state with this.
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| CN104848980A (en) * | 2015-06-08 | 2015-08-19 | 武汉理工大学 | Bridge stay cable force online detection method and system based on fiber sensing |
| CN107329933A (en) * | 2017-07-14 | 2017-11-07 | 北京知觉科技有限公司 | Fault detection method and device based on Fibre Optical Sensor vibration signal |
| CN107588802A (en) * | 2017-09-06 | 2018-01-16 | 中国特种设备检测研究院 | Hoisting equipment reductor vibration monitor system and method based on fibre optical sensor |
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| CN102928069A (en) * | 2012-10-08 | 2013-02-13 | 西安交通大学 | System and method for detecting vibration of high-voltage circuit breaker |
| CN103630233A (en) * | 2013-12-18 | 2014-03-12 | 国家电网公司 | Acceleration sensor-based system and acceleration sensor-based method for monitoring vibration of circuit breaker |
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| JP2010085366A (en) * | 2008-10-02 | 2010-04-15 | Toshiba Corp | Apparatus for diagnosing abnormality in insulation of high-voltage electric instrument |
| CN102928069A (en) * | 2012-10-08 | 2013-02-13 | 西安交通大学 | System and method for detecting vibration of high-voltage circuit breaker |
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| CN104848980A (en) * | 2015-06-08 | 2015-08-19 | 武汉理工大学 | Bridge stay cable force online detection method and system based on fiber sensing |
| CN107329933A (en) * | 2017-07-14 | 2017-11-07 | 北京知觉科技有限公司 | Fault detection method and device based on Fibre Optical Sensor vibration signal |
| CN107329933B (en) * | 2017-07-14 | 2020-06-19 | 北京知觉科技有限公司 | Fault detection method and device based on optical fiber sensing vibration signal |
| CN107588802A (en) * | 2017-09-06 | 2018-01-16 | 中国特种设备检测研究院 | Hoisting equipment reductor vibration monitor system and method based on fibre optical sensor |
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