CN202518951U - Hoisting machine health monitoring system based on fiber bragg grating sensing technology - Google Patents

Hoisting machine health monitoring system based on fiber bragg grating sensing technology Download PDF

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Publication number
CN202518951U
CN202518951U CN2012200987857U CN201220098785U CN202518951U CN 202518951 U CN202518951 U CN 202518951U CN 2012200987857 U CN2012200987857 U CN 2012200987857U CN 201220098785 U CN201220098785 U CN 201220098785U CN 202518951 U CN202518951 U CN 202518951U
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China
Prior art keywords
elevator machinery
fiber
grating
health monitoring
sensing technology
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CN2012200987857U
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Chinese (zh)
Inventor
丁克勤
王志杰
赵娜
李娜
王浩
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中国特种设备检测研究院
北京中检希望科技有限公司
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Priority to CN2012200987857U priority Critical patent/CN202518951U/en
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Abstract

The utility model provides a hoisting machine health monitoring system based on a fiber bragg grating sensing technology. A fiber bragg grating sensor is mounted at a key part of the surface of a hoisting machine so that structural responses under the effects of factors including various environments, loads and the like, and scientific evidences for hoisting machine maintenance and management can be effectively improved; the whole management level of a hoisting machine can be obviously improved and the safe operation of the hoisting machine can be ensured to the greatest extent; and faults can be pre-diagnosed and the service life of the hoisting machine is prolonged. Furthermore, the hoisting machine health monitoring system has the advantages of high monitoring precision and strong anti-interference capability.

Description

Elevator machinery health monitoring systems based on fiber grating sensing technology

Technical field

The utility model belongs to elevator machinery health monitoring technical field, is specifically related to a kind of elevator machinery health monitoring systems based on fiber grating sensing technology.

Background technology

Elevator machinery is a kind of steel vessel equipment, in petroleum refining industry and petrochemical complex, is mainly used in to store and transportation liquid state or gaseous state material.

Because elevator machinery in use; Receive the influence of internal pressure and external environment; Can engender the certain dangerous position, for example: because of phenomenons such as enlargement of crack, plastic deformation or phase transformation increase the danger that elevator machinery leaks, so; For guaranteeing the safe handling of elevator machinery, usually need carry out health detection to elevator machinery.

Existing elevator machinery health detecting method generally comprises following two types: (one) artificial directly visual inspection: promptly: through the outward appearance on naked eyes direct viewing elevator machinery surface, thereby judge whether dangerous position of elevator machinery.The major defect that this method exists is: on the one hand, the personnel that need have rich experiences just can carry out visual inspection, thereby have limited its application; On the other hand, the artificial visually examine checks usually can only provide qualitative conclusion to the health status of elevator machinery, can't quantize, and, subjective to the conclusion of elevator machinery health status, be difficult to elevator machinery health status is made accurate evaluation.(2) adopt portable instrument to monitor the health status of elevator machinery: promptly, when needs are monitored the health status of elevator machinery, at a certain detecting instrument of elevator machinery mounted on surface, thus the health status of detection elevator machinery.The major defect that this kind method exists is: real-time is poor, can't carry out permanently effective monitoring to the health status of elevator machinery.

The utility model content

Defective to the prior art existence; The utility model provides a kind of elevator machinery health monitoring systems based on fiber grating sensing technology; Owing to adopt fiber grating sensing technology; Can monitor in real time the health status of elevator machinery, and, the high and strong advantage of antijamming capability of monitoring accuracy also had.

The technical scheme that the utility model adopts is following:

The utility model provides a kind of elevator machinery health monitoring systems based on fiber grating sensing technology, comprising: first signal coupler, wideband light source, secondary signal coupler, coupling grating array, photoelectric conversion module, amplifier, A/D change-over circuit, embedded signal processing controller, computing machine and be installed in the sensor fibre grating array of elevator machinery to be monitored surface key position; Wherein, First end of said first signal coupler is connected with said wideband light source; Second end of said first signal coupler is connected with said sensor fibre grating array; The 3rd end of said first signal coupler is connected with said secondary signal coupler; First end of said secondary signal coupler is connected with said coupling grating array, is connected said photoelectric conversion module, said amplifier and said A/D change-over circuit successively between second end of said secondary signal coupler and first end of said embedded signal processing controller; Second end of said embedded signal processing controller is connected with said computing machine.

Preferably, also comprise: the D/A modular converter; The 3rd end of said embedded signal processing controller is connected with the input end of said D/A modular converter, and the mouth of said D/A modular converter is connected with said coupling grating array.

Preferably, said embedded signal processing controller is FPGA or DSP.

Preferably, said coupling grating array is the coupling grating array with piezoceramic.

Preferably, said sensor fibre grating array comprises: an above fiber-optic grating sensor; Each said fiber-optic grating sensor is through the optical fiber series connection.

Preferably, said fiber-optic grating sensor comprises from temperature compensation fiber Bragg grating strain sensor and/or optical fiber acceleration transducer.

Preferably, said elevator machinery to be monitored surface key position comprises one or more in the supporting leg place of mother metal place and said elevator machinery to be monitored of the commissure of said elevator machinery to be monitored, said elevator machinery to be monitored.

Preferably, the mode of said sensor fibre grating array through welding directly is welded in the mode that said elevator machinery to be monitored key position place, surface and/or said sensor fibre grating array attach through magnetic and is fixed on key position place, said elevator machinery to be monitored surface.

The beneficial effect of the utility model is following:

The elevator machinery health monitoring systems based on fiber grating sensing technology that the utility model provides can be monitored the structural response of elevator machinery under factor effects such as various environment, load in real time; And the scientific basis of elevator machinery maintenance management can be provided effectively; Significantly improve the holistic management level of elevator machinery; Guarantee the elevator machinery safe operation to greatest extent, in advance tracing trouble with prolong elevator machinery service life.And, also have the high and strong advantage of antijamming capability of monitoring accuracy

Description of drawings

The structural representation that Fig. 1 provides for the utility model based on the elevator machinery health monitoring systems of fiber grating sensing technology.

Software module figure in the elevator machinery health monitoring systems that Fig. 2 provides for the utility model.

The specific embodiment

Below in conjunction with accompanying drawing the elevator machinery health monitoring systems based on fiber grating sensing technology that the utility model provides is elaborated.

As shown in Figure 1; A kind of elevator machinery health monitoring systems based on fiber grating sensing technology for the utility model embodiment provides comprises: first signal coupler, wideband light source, secondary signal coupler, coupling grating array, photoelectric conversion module, amplifier, A/D change-over circuit, embedded signal processing controller, computing machine and be installed in the sensor fibre grating array of elevator machinery to be monitored surface key position; Wherein, First end of said first signal coupler is connected with said wideband light source; Second end of said first signal coupler is connected with said sensor fibre grating array; The 3rd end of said first signal coupler is connected with said secondary signal coupler; First end of said secondary signal coupler is connected with said coupling grating array, is connected said photoelectric conversion module, said amplifier and said A/D change-over circuit successively between second end of said secondary signal coupler and first end of said embedded signal processing controller; Second end of said embedded signal processing controller is connected with said computing machine.In addition, also comprise: the D/A modular converter; The 3rd end of said embedded signal processing controller is connected with the input end of said D/A modular converter, and the mouth of said D/A modular converter is connected with said coupling grating array.Wherein, the embedded signal processing controller is FPGA or DSP.The coupling grating array can be for having the coupling grating array of piezoceramic.The sensor fibre grating array comprises: an above fiber-optic grating sensor; Each said fiber-optic grating sensor is through the optical fiber series connection.

In the utility model, the sensor fibre grating array can directly be welded in said elevator machinery to be monitored key position place, surface through the mode of welding and/or said sensor fibre grating array can be fixed on key position place, said elevator machinery to be monitored surface through the mode that magnetic attaches.Wherein, the surperficial key position of elevator machinery to be monitored comprises elevator machinery steel case beam and/or elevator machinery girder.。

The elevator machinery health monitoring systems based on fiber grating sensing technology that the utility model provides adopts coupling grating demodulation method that optical fiber grating sensing network information is carried out demodulation; Its principle of work is as shown in Figure 1: the light that wideband light source BBS sends incides the sensor fibre grating array through first signal coupler; Have only the light that satisfies the Bragg condition just to be reflected; Through getting into the coupling grating array behind first signal coupler and the secondary signal coupler; Through on the piezoceramic of coupling grating array, applying the sawtooch sweep voltage signal, adjusting is mated the centre wavelength of grating array and it is changed within the specific limits.When the reflectance spectra peak of coupling grating array overlaps with the reflectance spectra peak of sensor fibre grating array; Light intensity through the reflection of overmatching grating array is maximum; This reflected light converges on the photoelectric conversion module, and photoelectric conversion module is converted into corresponding electric signal, after amplifier amplification and the conversion of A/D change-over circuit; Gather this voltage signal in real time and find out its maxim through the control of embedded signal processing controller, this maxim is pairing largest light intensity after the reflection of overmatching grating array.Can confirm to be applied to corresponding magnitude of voltage on the coupling grating array according to this maxim simultaneously; Again according to the relation of reflectance spectra peak wavelength and sweep voltage; Just can draw the sensor fibre grating array and receive external physical quantity to influence the back wavelength shift, can calculate the size of measured physical quantity strain, vibration etc. at last according to the encoding relation formula of sensor external physical quantity and wavelength.In said process, on the piezoceramic of coupling grating array, apply the sawtooch sweep voltage signal and control by the embedded signal processing controller.

In addition, in the utility model, fiber-optic grating sensor comprises from temperature compensation fiber Bragg grating strain sensor and optical fiber acceleration transducer.Introduce respectively in the face of these two types of sensors down:

(1) from the temperature compensation fiber Bragg grating strain sensor

From the temperature compensation fiber Bragg grating strain sensor is to develop to elevator machinery steel case beam strain monitoring.Adopt exclusive temperature self-compensation technology and strain enhanced sensitivity technology, had higher Measurement Resolution, survey precision and good temperature compensating ability.Its technical performance parameter is as shown in table 1.

Table 1 is from temperature compensation fiber Bragg grating strain sensor performance perameter

(2) optical fiber acceleration transducer

Optical fiber acceleration transducer is used for monitoring in real time the acceleration responsives under effects such as wind, lift heavy such as girder; Thereby the integral dynamic properties of assessment large scale hoisting machinery is for structural health and safety case, checking design theory and the daily operation management of estimating large scale hoisting machinery provides foundation.Its Specifeca tion speeification is as shown in table 2.

Table 2 optical fiber acceleration transducer performance perameter

Project Unit Parameter value Range g 1 Resolution ug 50 Hz-KHz Hz 0~1000 Operating temperature -50~120

What the utility model provided also can be called the monitoring structural health conditions (FBG) demodulator jointly based on the module except that fiber-optic grating sensor in the elevator machinery health monitoring systems of fiber grating sensing technology; The monitoring structural health conditions (FBG) demodulator is applicable to that polytype fiber-optic grating sensor signals such as optical fiber grating temperature, strain, pressure, displacement are separated and is in harmonious proportion the sensing data dynamic acquisition, also can be used for the high speed signal demodulation and the data acquisition of optical fiber acceleration transducer.

This monitoring structural health conditions (FBG) demodulator adopts scan laser and parallel spectrographic detection technology; Wherein, The source device output optical power degree of utilization is compared traditional ASE+ adjustable filter technology up to more than 85%, and light source output power has improved more than 100 times; Power supply power consumption then descends 50%, and the light source useful service life improves more than 10 years).Its important performance indexes is as shown in table 3.

Table 3 monitoring structural health conditions (FBG) demodulator basic specification

The elevator machinery health monitoring systems that the utility model provides based on fiber grating sensing technology, the practical implementation way of on large scale hoisting machinery, installing is following:

(1) selection of large scale hoisting machinery monitoring point

In actual application,, select the suitable arrangement position according to the integrated stress distribution situation of large scale hoisting machinery to large scale hoisting machinery metal construction characteristics and on-the-spot running environment.

(2) installation of fiber-optic grating sensor and data transmission

Adopt bonding machine that fiber-optic grating sensor is directly installed on the measuring point surface, and the cover protection box, the damage of harsh environment prevented to fiber-optic grating sensor.

(3) signal transporting part

A plurality of identical or different type fiber grating sensors are serially connected on the optical fiber, and the optical fiber of different length connects through welding.Fiber-optic grating sensor is connected with the monitoring structural health conditions (FBG) demodulator through optical fiber, and optical cable is protected by galvanized pipe.

(4) monitoring structural health conditions (FBG) demodulator

The effect of monitoring structural health conditions (FBG) demodulator is to change optical wavelength signal into electric signal.The electric signal of monitoring structural health conditions (FBG) demodulator output is sent into computing machine through netting twine and is carried out data analysis and processing.

(5) computing machine

Elevator machinery structural health evaluating system is installed in the computing machine, thereby realizes assessment the health status of elevator machinery structure.Mainly constitute by the optical fiber grating network demodulation groupware, control and communication software; Also comprise data base administration that measured data are handled, expert system assessment software etc. simultaneously; In order to realizing real time on-line monitoring and data storage and inquiry, and combine correlation theory to realize to early warning, identification and the safety evaluatio of crane structure damage and life appraisal etc. to the hoisting crane strain.As shown in Figure 2, software module figure in the elevator machinery health monitoring systems that provides for the utility model.

Functional requirement to elevator machinery health monitoring evaluation system; Dynamic strain information and the fast characteristics of system's frequency response according to hoisting crane; The design-calculated software system structure has adopted advanced C/S structure and 3D modeling technique; Thereby realize real-time stress calculation, demonstration and alarm function, formed friendly man-machine interaction environment.

The elevator machinery health monitoring systems that the utility model is provided is installed on 300 tons of transfer cranes of Nanjing, Nanjing shipyard, experimentizes.Wherein, the hoisting crane main performance index is seen table 4:

Table 4 hoisting crane basic specification

In order to verify the reliability of this monitoring system, sensitieness is used tds-530 digital still strain gage and this monitoring system of surveying device production in the Tokyo and is compared.

1/2 place on hoisting crane crossbeam east, same position is arranged two types of sensors, that is: from temperature compensation fiber Bragg grating strain sensor and optical fiber acceleration transducer.In the hoisting crane operational process, carry out data contrasts, through evidence, this monitoring system and traditional resistance strain gage detection technique have the conformability of data and precision, and on-site installation and operate more conveniently, also can monitor for a long time simultaneously.

Compare with traditional elevator machinery detection means, the elevator machinery health monitoring systems based on fiber grating sensing technology that the utility model provides has following characteristics:

(1) quasi-distributed full photo measure and transmission

Fiber-optic grating sensor this as passive device, the sensing and the transmission of transducing signal are optical signal, thereby the monitoring scene do not have electronic machine, do not receive electromagnetic interference, need not to do lightning Protection.

(2) need not calibration in system's installation and the long-term use process

Optical fiber grating essence is stable, does not have zero creep.Because optical fiber grating adopts center wavelength of light to characterize the physical quantity value, belongs to digital quantity, the attenuated optical signal of introducing owing to crooked, disturbance in the aging decay of light source and Transmission Fibers laying, the use does not influence survey precision.Optical fiber sensing analyzer does not have movable member, and long-term use need not to demarcate.

(3) high reliability

Fiber-optic grating sensor and transmission route are silica fibre, can keep the many decades work life at abominable humiture environment.

In sum; The elevator machinery health monitoring systems based on fiber grating sensing technology that the utility model provides can be monitored the structural response of elevator machinery under factor effects such as various environment, load in real time; And the scientific basis of elevator machinery maintenance management can be provided effectively; Significantly improve the holistic management level of elevator machinery, guarantee the elevator machinery safe operation to greatest extent, in advance tracing trouble with prolong elevator machinery service life.And, also have the high and strong advantage of antijamming capability of monitoring accuracy.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.

Claims (8)

1. elevator machinery health monitoring systems based on fiber grating sensing technology; It is characterized in that, comprising: first signal coupler, wideband light source, secondary signal coupler, coupling grating array, photoelectric conversion module, amplifier, A/D change-over circuit, embedded signal processing controller, computing machine and be installed in the sensor fibre grating array of elevator machinery to be monitored surface key position; Wherein, First end of said first signal coupler is connected with said wideband light source; Second end of said first signal coupler is connected with said sensor fibre grating array; The 3rd end of said first signal coupler is connected with said secondary signal coupler; First end of said secondary signal coupler is connected with said coupling grating array, is connected said photoelectric conversion module, said amplifier and said A/D change-over circuit successively between second end of said secondary signal coupler and first end of said embedded signal processing controller; Second end of said embedded signal processing controller is connected with said computing machine.
2. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1 is characterized in that, also comprises: the D/A modular converter; The 3rd end of said embedded signal processing controller is connected with the input end of said D/A modular converter, and the mouth of said D/A modular converter is connected with said coupling grating array.
3. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1 is characterized in that said embedded signal processing controller is FPGA or DSP.
4. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1 is characterized in that, said coupling grating array is the coupling grating array with piezoceramic.
5. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1 is characterized in that, said sensor fibre grating array comprises: an above fiber-optic grating sensor; Each said fiber-optic grating sensor is through the optical fiber series connection.
6. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 5 is characterized in that said fiber-optic grating sensor comprises from temperature compensation fiber Bragg grating strain sensor and/or optical fiber acceleration transducer.
7. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1 is characterized in that, said elevator machinery to be monitored surface key position comprises elevator machinery steel case beam and/or elevator machinery girder.
8. the elevator machinery health monitoring systems based on fiber grating sensing technology according to claim 1; It is characterized in that the mode of said sensor fibre grating array through welding directly is welded in the mode that said elevator machinery to be monitored key position place, surface and/or said sensor fibre grating array attach through magnetic and is fixed on key position place, said elevator machinery to be monitored surface.
CN2012200987857U 2012-03-15 2012-03-15 Hoisting machine health monitoring system based on fiber bragg grating sensing technology CN202518951U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267763A (en) * 2013-04-27 2013-08-28 广州市特种机电设备检测研究院 Health monitoring method for metal structure of hoisting machinery
CN103274304A (en) * 2013-06-09 2013-09-04 广州市特种机电设备检测研究院 Method for dynamically adjusting monitoring and safety pre-warning threshold values of crane structure
CN103950837A (en) * 2014-05-21 2014-07-30 上海市特种设备监督检验技术研究院 Safety monitoring system for hoisting machine and method
CN104197993A (en) * 2014-09-22 2014-12-10 广州特种机电设备检测研究院 Health monitoring and safety warning method for shipbuilding gantry crane structure
CN104229632A (en) * 2014-07-07 2014-12-24 江苏省特种设备安全监督研究院南通分院 Safety and health monitoring system of portal crane
CN106115488A (en) * 2016-08-24 2016-11-16 武汉理工大学 A kind of visual monitoring system of high pedestal jib crane ring flange crackle
CN106276606A (en) * 2016-08-09 2017-01-04 武汉理工大学 Bridge crane HEALTH ONLINE based on fiber grating sensing technology monitoring system
CN107673237A (en) * 2017-11-09 2018-02-09 芜湖市长江起重设备制造有限公司 A kind of safety monitoring assembly of crane

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267763A (en) * 2013-04-27 2013-08-28 广州市特种机电设备检测研究院 Health monitoring method for metal structure of hoisting machinery
CN103267763B (en) * 2013-04-27 2016-01-20 广州市特种机电设备检测研究院 A kind of lifting machinery metal structure health monitor method
CN103274304A (en) * 2013-06-09 2013-09-04 广州市特种机电设备检测研究院 Method for dynamically adjusting monitoring and safety pre-warning threshold values of crane structure
CN103950837A (en) * 2014-05-21 2014-07-30 上海市特种设备监督检验技术研究院 Safety monitoring system for hoisting machine and method
CN103950837B (en) * 2014-05-21 2016-04-27 上海市特种设备监督检验技术研究院 A kind of safety monitoring system of elevator machinery and method
CN104229632A (en) * 2014-07-07 2014-12-24 江苏省特种设备安全监督研究院南通分院 Safety and health monitoring system of portal crane
CN104197993A (en) * 2014-09-22 2014-12-10 广州特种机电设备检测研究院 Health monitoring and safety warning method for shipbuilding gantry crane structure
CN106276606A (en) * 2016-08-09 2017-01-04 武汉理工大学 Bridge crane HEALTH ONLINE based on fiber grating sensing technology monitoring system
CN106115488A (en) * 2016-08-24 2016-11-16 武汉理工大学 A kind of visual monitoring system of high pedestal jib crane ring flange crackle
CN107673237A (en) * 2017-11-09 2018-02-09 芜湖市长江起重设备制造有限公司 A kind of safety monitoring assembly of crane

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