CN104458012A - Sliding electric contact surface transient temperature detection system and method - Google Patents
Sliding electric contact surface transient temperature detection system and method Download PDFInfo
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- CN104458012A CN104458012A CN201410795648.2A CN201410795648A CN104458012A CN 104458012 A CN104458012 A CN 104458012A CN 201410795648 A CN201410795648 A CN 201410795648A CN 104458012 A CN104458012 A CN 104458012A
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Abstract
The invention discloses a sliding electric contact surface transient temperature detection system and method. The system comprises an electric contact device, multiple optical fiber temperature sensing probes, a signal acquisition module and a thermal analysis module. The electric contact device comprises an electric brush and a slide rail. The optical fiber temperature sensing probes are mounted on the electric contact device. Each optical fiber temperature sensing probe is used for detecting infrared radiation generated at the corresponding position of electric contact surfaces in the sliding process of the electric brush and the slide rail. Energy signals generated by the detected infrared radiation are transmitted to the signal acquisition module through optical fibers. The signal acquisition module is used for converting the received energy signals into corresponding electric signals and processing the electric signals to obtain temperature electric signals representing temperature values. The thermal analysis module is used for determining the temperature distribution conditions on the electric contact surfaces in the sliding process of the electric brush and the slide rail based on the received temperature electric signals. As a result, detection of the transient temperature on the sliding electric contact surfaces is realized.
Description
Technical field
The present invention relates to electrical contact equipment technical field and transient temperature detection field, particularly relate to a kind of slip electrical contact surface transient temperature detection system and detection method.
Background technology
In slip electrical contact under big current contact load, curtage is mutually related, can with generation mechanical effect, thermal effect or the electrical effect comprising electric spark and electric arc.These effects can make the state of contact change, and produce this change due to the separation voltage be connected across in electrical contact and are greater than the minimum arc voltage of material.
In electric railway, also there is the slip electrical contact phenomenon under typical big current load, such as, when departing from train travelling process as the pantograph pan of the critical component of Pantograph-OCS system and surface of contact, when the electric current be disconnected and the voltage be added between slide plate and surface of contact exceed certain value, electric spark or electric arc can be formed at contact gap.
Phenomenon of arc discharge can cause many-sided harm to the operation of electric locomotive, especially in off-line moment, high arc temperature makes surface of contact local temperature too high, there is high temperature corrode, cause the coarse injustice of surface of contact, if things go on like this, the fracture of surface of contact can be caused, the serious threat safe operation of railway.
Therefore, carry out research to transient state temperature field under electric interface dynamic condition under big current load to have very important significance, research temperature conduction and distribution, not only can understand the impact of transient temperature on surface of contact, also can be the ablation of Pantograph-OCS system osculatory, damage, contact net the research of the problem such as maintenance reliable basis is provided.
In the research of current high ferro Pantograph-OCS system material damage, can not test material damage process in real time, and there is no suitable means of testing at present yet.
Summary of the invention
The embodiment of the present invention provides a kind of slip electrical contact surface transient temperature detection system and detection method, in order to solve the problem that in prior art, existence cannot detect slip electrical contact surface transient temperature.
The embodiment of the present invention provides a kind of slip electrical contact surface transient temperature detection system, comprising: electrical contact equipment, multiple optical fiber sensing probe, signal acquisition module and thermal analysis module, and described electrical contact equipment comprises brush and slide rail, wherein:
Described multiple optical fiber sensing probe is arranged on described electrical contact equipment respectively, and the diverse location of described multiple optical fiber sensing probe corresponding described slide rail respectively, optical fiber sensing is popped one's head in the infrared radiation produced for the electrical contact surface correspondence position detected between described brush and described slide rail in sliding process;
Described multiple optical fiber sensing probe is connected with described signal acquisition module by optical fiber, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to described signal acquisition module;
Described signal acquisition module is used for electric signal corresponding to the described energy signal received converting to, and processes described electric signal, obtains the temperature signal representing temperature value, and described temperature signal is sent to described thermal analysis module;
Described thermal analysis module is used for, based on the described temperature signal received, determining the profiling temperatures of the electrical contact surface between described brush and described slide rail in sliding process.
Further, described optical fiber sensing probe, comprising: optic probe lens, optical fiber front end, optical fiber and infrared fileter, wherein:
The infrared radiation that described electrical contact surface produces is assembled through described optic probe lens, and project described optical fiber front end, the energy signal that infrared radiation produces is transferred to described signal acquisition module by optical fiber after being filtered by Optical Fiber Transmission and described infrared fileter.
Further, described optical fiber sensing probe, comprising: optic probe lens, optical fiber front end, optical fiber, coupling mechanism and infrared fileter, wherein:
The infrared radiation that described electrical contact surface produces is assembled through described optic probe lens, and project described optical fiber front end, the energy signal that infrared radiation produces passes through Optical Fiber Transmission, and carry out being coupled and after the optical filtering of described infrared fileter, being transferred to described signal acquisition module by optical fiber through described coupling mechanism.
Further, described signal acquisition module, comprising: photovoltaic infrared detector, and signal amplifies submodule, signal separaant module and signals collecting submodule, wherein:
Described photovoltaic infrared detector electric signal corresponding to the described energy signal received converts to;
And by described signal amplification submodule, described electric signal is amplified and linearization process, obtain standard electric signal;
Described standard electric signal, after described signal separaant module carries out isolation processing, outputs to described signals collecting submodule;
Described signals collecting submodule carries out analog to digital conversion to the standard electric signal through isolation processing received, and obtains the temperature signal representing temperature value.
Further, the response time of described signals collecting submodule is not more than 2ms.
Further, described electrical contact equipment is electrical contact experimental facilities.
The embodiment of the present invention also provides a kind of slip electrical contact surface transient temperature detection method based on said detecting system, comprising:
Optical fiber sensing probe detects the infrared radiation that the electrical contact surface correspondence position between described brush and described slide rail in sliding process produces, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to described signal acquisition module;
The described energy signal received electric signal corresponding to described infrared radiation is converted to by described signal acquisition module, and processes described electric signal, obtains the temperature signal representing temperature value, and described temperature signal is sent to described thermal analysis module;
Described thermal analysis module, based on the described temperature signal received, determines the profiling temperatures of the electrical contact surface between described brush and described slide rail in sliding process.
Further, described electrical contact equipment is electrical contact experimental facilities;
Before the infrared radiation that electrical contact surface correspondence position between the optical fiber sensing probe described brush of detection and described slide rail in sliding process produces, also comprise:
The voltage being greater than preset voltage value is passed to described electrical contact experimental facilities, and the described brush controlling described electrical contact experimental facilities slides on described slide rail.
Beneficial effect of the present invention comprises:
Adopt the slip electrical contact surface transient temperature detection system that the embodiment of the present invention provides, in the process of sliding between the brush and slide rail of electrical contact equipment, can by being arranged on the light temperature sensing probe on electrical contact equipment, the infrared radiation that on the electrical contact surface of detection phone and slide rail, correspondence position produces, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to signal acquisition module, signal acquisition module is used for electric signal corresponding to the energy signal of reception converting to, and electric signal is processed, obtain the temperature signal representing temperature value, and temperature signal is sent to thermal analysis module, thermal analysis module is used for the temperature signal based on receiving, determine the profiling temperatures of the electrical contact surface between brush and slide rail in sliding process, thus the detection achieved slip electrical contact surface transient temperature.
The further feature of the application and advantage will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the application.The object of the application and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, is not construed as limiting the invention with the embodiment of the present invention one.In the accompanying drawings:
The structural representation of the slip electrical contact surface transient temperature detection system that Fig. 1 provides for the embodiment of the present invention;
One of structural representation of optical fiber sensing probe in the slip electrical contact surface transient temperature detection system that Fig. 2 provides for the embodiment of the present invention;
The structural representation two of the optical fiber sensing probe in the slip electrical contact surface transient temperature detection system that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the signal acquisition module in the slip electrical contact surface transient temperature detection system that Fig. 4 provides for the embodiment of the present invention;
The process flow diagram of the slip electrical contact surface transient temperature detection method that Fig. 5 provides for the embodiment of the present invention.
Embodiment
In order to provide the implementation detected slip electrical contact surface transient temperature, embodiments provide a kind of slip electrical contact surface transient temperature detection system and detection method, below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein, only for instruction and explanation of the present invention, is not intended to limit the present invention.And when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The embodiment of the present invention provides a kind of slip electrical contact surface transient temperature detection system, as shown in Figure 1, comprising: electrical contact equipment 11, multiple optical fiber sensing probe 12, signal acquisition module 13 and thermal analysis module 14, electrical contact equipment 11 comprises brush and slide rail, wherein:
Multiple optical fiber sensing probe 12 is arranged on electrical contact equipment 11 respectively, near the surface of slide rail, and multiple optical fiber sensing probe 12 can distinguish the diverse location of corresponding slide rail, each optical fiber sensing probe 12 is for detecting the electrical contact surface between brush and slide rail in sliding process, and this optical fiber sensing is popped one's head in the infrared radiation that 12 correspondence positions produce;
The plurality of optical fiber sensing probe 12 is connected with signal acquisition module 13 respectively by optical fiber, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to signal acquisition module 13;
Signal acquisition module 13 for the energy signal of reception being converted to corresponding electric signal, and processes this electric signal, obtains the temperature signal representing temperature value, and temperature signal is sent to thermal analysis module 14;
Thermal analysis module 14, for based on the temperature signal received, determines the profiling temperatures of the electrical contact surface between brush and slide rail in sliding process.
Wherein, consider directly the slip electrical contact surface transient temperature under the big current load of the Pantograph-OCS system of high ferro is detected in conceptual phase more inconvenient, so, in the embodiment of the present invention, propose electrical contact equipment 11 and can adopt electrical contact experimental facilities, and pass to the voltage being greater than preset voltage value, thus produce big current load, and control brush high-speed slide on slide rail, thus the Pantograph-OCS system of simulation high ferro, and for this electrical contact experimental facilities, carry out the detection of slip electrical contact surface transient temperature, thus provide technical support for the analysis of further research material damage measure.
In the embodiment of the present invention, as shown in Figure 2, optical fiber sensing probe 12, can comprise: optic probe lens 21, optical fiber front end 22, optical fiber 23 and infrared fileter 24, wherein:
The infrared radiation that electrical contact surface between the brush of electrical contact equipment 11 and slide rail produces, assemble through optic probe lens 21, and project optical fiber front end 22, after the energy signal that infrared radiation produces is transmitted by optical fiber 23 and infrared fileter 24 filters, be transferred to signal acquisition module 13 by optical fiber.
In the embodiment of the present invention, as shown in Figure 3, optical fiber sensing probe 12, also can comprise: optic probe lens 31, optical fiber front end 32, optical fiber 33, coupling mechanism 34 and infrared fileter 35, wherein:
The infrared radiation that electrical contact surface between the brush of electrical contact equipment 11 and slide rail produces, assemble through optic probe lens 31, and project fine front end 32, the energy signal that infrared radiation produces is transmitted by optical fiber 33, and carry out being coupled and after infrared fileter 35 optical filtering, being transferred to signal acquisition module 13 by optical fiber through coupling mechanism 34.
In the embodiment of the present invention, as shown in Figure 4, signal acquisition module 13, can comprise: photovoltaic infrared detector 41, and signal amplifies submodule 42, signal separaant module 43 and signals collecting submodule 44, wherein:
Photovoltaic infrared detector 41 detects the energy signal by Optical Fiber Transmission, and the energy signal of reception is converted to corresponding electric signal;
And by signal amplification submodule 42, this electric signal is amplified and linearization process, obtain standard electric signal;
Standard electric signal, after signal separaant module 43 carries out isolation processing, outputs to signals collecting submodule 44;
Signals collecting submodule 44 carries out analog to digital conversion to the standard electric signal through isolation processing received, and obtains the temperature signal representing temperature value.
Wherein, by signal separaant module 43 make self power supply signal, isolate between input signal and output signal, and disconnect process loops, make process signal still normal transmission, thus improve the interference free performance of detection system, this detection system that the embodiment of the present invention is proposed can be applicable to strong-electromagnetic field environment, and can obtain testing result accurately.
Further, in order to realize the timely collection to the signal detected, signals collecting submodule 44 can adopt high-speed signal acquisition module, and such as, its response time is not more than 2ms, thus meets the requirement to high-speed signal acquisition, avoids the loss detecting data.
Concrete, signals collecting submodule 44 can adopt S3C2440 processor.
In the embodiment of the present invention, thermal analysis module 14 is after receiving temperature signal, can according to these temperature detection data of reality, and in conjunction with the ultimate principle of thermal conduction study and finite element, thermal analyses is carried out in the temperature field that docking electricity touches face, thus determine the profiling temperatures of the electrical contact surface between brush and slide rail in sliding process, such as, obtain the Temperature Distribution of electrical contact surface in each moment and the temperature variation curve of diverse location.
Concrete, thermal source theoretical analysis can be passed through, determine electrical contact surface thermal force and material parameter, thermaltransmission mode, set up finite element model, definition unit type, definition material performance parameter, create geometry stereoscopic model, to model distributive property grid division, arrange analysis type, apply the temperature loading of shape shadow, calculating solves, electrical contact surface same position place is obtained without moment thermo parameters method situation by analysis of simulation result, and diverse location synchronization thermo parameters method situation on electrical contact surface.
Wherein, based on heat pass learn and finite element ultimate principle, can refer to prior art, be no longer described in detail at this.
Based on said detecting system, the embodiment of the present invention also provides a kind of slip electrical contact surface transient temperature detection method, as shown in Figure 5, can comprise following treatment step:
Step 501, optical fiber sensing probe detects the infrared radiation that the electrical contact surface correspondence position between brush and slide rail in sliding process produces, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to described signal acquisition module.
The energy signal of reception is converted to corresponding electric signal by infrared radiation by step 502, signal acquisition module, and processes electric signal, obtains the temperature signal representing temperature value, and temperature signal is sent to thermal analysis module.
Step 503, thermal analysis module, based on the temperature signal received, determine the profiling temperatures of the electrical contact surface between brush and slide rail in sliding process.
Further, above-mentioned electrical contact equipment can be electrical contact experimental facilities;
Accordingly, before the infrared radiation that the electrical contact surface correspondence position between optical fiber sensing probe detection brush and slide rail in sliding process produces, can also comprise the steps:
Electrical contact experimental facilities is passed to the voltage being greater than preset voltage value, and the brush controlling electrical contact experimental facilities slides on slide rail, thus the simulation realized the Pantograph-OCS system of high ferro, and for this electrical contact experimental facilities, carry out the detection of slip electrical contact surface transient temperature, thus provide technical support for the analysis of further research material damage measure.
The detailed processing mode of each step in the said method that the embodiment of the present invention provides, with reference to the above-mentioned description content to the detection system that the embodiment of the present invention proposes, no longer can carry out repeated description at this.
In sum, the scheme that the embodiment of the present invention provides, comprise: electrical contact equipment, multiple optical fiber sensing probe, signal acquisition module and thermal analysis module, electrical contact equipment comprises brush and slide rail, wherein: multiple optical fiber sensing probe is arranged on electrical contact equipment respectively, near the surface of slide rail, and multiple optical fiber sensing probe can distinguish the diverse location of corresponding slide rail, each optical fiber sensing probe is for detecting the electrical contact surface between brush and slide rail in sliding process, the infrared radiation that this optical fiber sensing probe correspondence position produces, the plurality of optical fiber sensing probe is connected with signal acquisition module respectively by optical fiber, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to signal acquisition module, signal acquisition module is used for electric signal corresponding to the energy signal of reception converting to, and processes this electric signal, obtains the temperature signal representing temperature value, and temperature signal is sent to thermal analysis module, thermal analysis module is used for, based on the temperature signal received, determining the profiling temperatures of the electrical contact surface between brush and slide rail in sliding process.Thus the detection achieved slip electrical contact surface transient temperature.
Further, the scheme that the embodiment of the present invention provides, be applicable to instantaneous measurement, detection sensitivity is high, and the anti-strong-electromagnetic field interference of detection system, reliable operation, has a style of one's own, and is convenient to promote.
And, for the high-speed slide contact scene under big current load, non-contact method is adopted to carry out the detection of multiple spot transient temperature to the temperature of electrical contact surface, finite element analysis means are utilized to carry out thermal force and heat conduction analysis to transient state temperature field, obtain the internal temperature change of the electrical contact surface at diverse location place, thus provide technical basis for the damage measure of further research material and analysis.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a slip electrical contact surface transient temperature detection system, is characterized in that, comprising: electrical contact equipment, multiple optical fiber sensing probe, signal acquisition module and thermal analysis module, and described electrical contact equipment comprises brush and slide rail, wherein:
Described multiple optical fiber sensing probe is arranged on described electrical contact equipment respectively, and the diverse location of described multiple optical fiber sensing probe corresponding described slide rail respectively, optical fiber sensing is popped one's head in the infrared radiation produced for the electrical contact surface correspondence position detected between described brush and described slide rail in sliding process;
Described multiple optical fiber sensing probe is connected with described signal acquisition module by optical fiber, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to described signal acquisition module;
Described signal acquisition module is used for electric signal corresponding to the described energy signal received converting to, and processes described electric signal, obtains the temperature signal representing temperature value, and described temperature signal is sent to described thermal analysis module;
Described thermal analysis module is used for, based on the described temperature signal received, determining the profiling temperatures of the electrical contact surface between described brush and described slide rail in sliding process.
2. the system as claimed in claim 1, is characterized in that, described optical fiber sensing probe, comprising: optic probe lens, optical fiber front end, optical fiber and infrared fileter, wherein:
The infrared radiation that described electrical contact surface produces is assembled through described optic probe lens, and project described optical fiber front end, the energy signal that infrared radiation produces is transferred to described signal acquisition module by optical fiber after being filtered by Optical Fiber Transmission and described infrared fileter.
3. the system as claimed in claim 1, is characterized in that, described optical fiber sensing probe, comprising: optic probe lens, optical fiber front end, optical fiber, coupling mechanism and infrared fileter, wherein:
The infrared radiation that described electrical contact surface produces is assembled through described optic probe lens, and project described optical fiber front end, the energy signal that infrared radiation produces passes through Optical Fiber Transmission, and carry out being coupled and after the optical filtering of described infrared fileter, being transferred to described signal acquisition module by optical fiber through described coupling mechanism.
4. the system as described in as arbitrary in claim 1-3, it is characterized in that, described signal acquisition module, comprising: photovoltaic infrared detector, and signal amplifies submodule, signal separaant module and signals collecting submodule, wherein:
Described photovoltaic infrared detector electric signal corresponding to the described energy signal received converts to;
And by described signal amplification submodule, described electric signal is amplified and linearization process, obtain standard electric signal;
Described standard electric signal, after described signal separaant module carries out isolation processing, outputs to described signals collecting submodule;
Described signals collecting submodule carries out analog to digital conversion to the standard electric signal through isolation processing received, and obtains the temperature signal representing temperature value.
5. system as claimed in claim 4, it is characterized in that, the response time of described signals collecting submodule is not more than 2ms.
6. the system as described in as arbitrary in claim 1-3, it is characterized in that, described electrical contact equipment is electrical contact experimental facilities.
7., based on a slip electrical contact surface transient temperature detection method for detection system according to claim 1, it is characterized in that, comprising:
Optical fiber sensing probe detects the infrared radiation that the electrical contact surface correspondence position between described brush and described slide rail in sliding process produces, and by optical fiber, the energy signal that the infrared radiation detected produces is transferred to described signal acquisition module;
The described energy signal received electric signal corresponding to described infrared radiation is converted to by described signal acquisition module, and processes described electric signal, obtains the temperature signal representing temperature value, and described temperature signal is sent to described thermal analysis module;
Described thermal analysis module, based on the described temperature signal received, determines the profiling temperatures of the electrical contact surface between described brush and described slide rail in sliding process.
8. method as claimed in claim 7, it is characterized in that, described electrical contact equipment is electrical contact experimental facilities;
Before the infrared radiation that electrical contact surface correspondence position between the optical fiber sensing probe described brush of detection and described slide rail in sliding process produces, also comprise:
The voltage being greater than preset voltage value is passed to described electrical contact experimental facilities, and the described brush controlling described electrical contact experimental facilities slides on described slide rail.
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| CN201410795648.2A CN104458012A (en) | 2014-12-18 | 2014-12-18 | Sliding electric contact surface transient temperature detection system and method |
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| CN201410795648.2A CN104458012A (en) | 2014-12-18 | 2014-12-18 | Sliding electric contact surface transient temperature detection system and method |
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| CN108226717A (en) * | 2016-12-15 | 2018-06-29 | 深圳先进技术研究院 | A kind of bow net arcing monitors system |
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| CN112067038A (en) * | 2020-05-28 | 2020-12-11 | 北京机械设备研究所 | Test platform for multi-physical field dynamic response under transient strong electric heating and mechanical loading device |
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Application publication date: 20150325 |