CN107422035B - Nondestructive testing device and method for carbon fiber composite core wire core rod - Google Patents
Nondestructive testing device and method for carbon fiber composite core wire core rod Download PDFInfo
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- CN107422035B CN107422035B CN201710591761.2A CN201710591761A CN107422035B CN 107422035 B CN107422035 B CN 107422035B CN 201710591761 A CN201710591761 A CN 201710591761A CN 107422035 B CN107422035 B CN 107422035B
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Abstract
The invention provides a nondestructive testing device and a nondestructive testing method for a carbon fiber composite core wire core rod. The apparatus comprises: the device comprises an excitation probe, a lead positioning device, an oscillation signal pickup probe and an oscillation signal analyzer. After positioning a lead to be detected, adopting an excitation probe to emit vibration waves with specific frequency to radiate a composite material core rod in the lead; and collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, and forming a continuous spectrum by using the signals collected by the pickup probe and carrying out digital processing. Finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected. The equipment can be widely applied to nondestructive testing of the carbon fiber composite material lead core rod, the analysis process is quick and convenient, the detection process is convenient, and the damage to the core rod is avoided.
Description
Technical Field
The invention relates to a detection method of a carbon fiber composite material lead core rod, in particular to equipment and a method for detecting damage of an internal composite material core rod of the carbon fiber composite material lead core rod in a specific frequency ultrasonic radiation mode.
Background
The carbon fiber composite material wire core rod is an important part of a high-voltage wire in the field of power transmission, and mainly has the effects of replacing a metal steel core in an aluminum conductor steel-reinforced wire, the carbon fiber resin matrix composite material is used as the carbon fiber wire core rod made of the carbon fiber resin matrix composite material, the strength, the rigidity and the environmental adaptability of the carbon fiber resin matrix composite material are strong, the sag deformation of a high-voltage transmission line between remote towers can be effectively reduced, and therefore the carbon fiber composite material wire core rod also becomes a novel high-tech product in the fields of high-voltage transmission and remote transmission, and can effectively replace various quality and service life problems caused by the metal.
However, the core rod made of the novel composite material also has many problems in the using process or the construction stringing process, wherein the typical and main damage is the surface and the inner part of the carbon fiber composite core rod, the damage may be generated in the product preparation process or the incomplete construction process in the stringing process, and if the defect damage is not found and treated in time, the hidden trouble is inevitably brought to the stable use of the power transmission line.
In view of the multilayer structure of the existing high-voltage transmission line, the outer part of the carbon fiber composite core rod is provided with a thicker wrapping layer and an outer insulating layer of the aluminum stranded wire, so that once a line is erected, the problem of damage to the composite material rod of the inner core part is difficult to find, and the purpose of timely finding the damage cannot be achieved by the traditional visual inspection or surface detection means. At present, the research and means for detecting and processing the multilayer high-voltage transmission line at home and abroad are almost zero, and particularly, the detection aspect of the carbon fiber composite material lead core rod is difficult. In order to achieve the purpose of not damaging the core rod structure, how to quickly and conveniently detect, intelligently compare, extract, analyze and comprehensively evaluate the surface and the internal damage of the carbon fiber composite core rod becomes a hotspot of current research.
Due to the rapid development of computer technology and ultrasonic detection technology, the development of the rapid nondestructive intelligent detection technology for the novel carbon fiber composite material lead core rod is gradually focused on researchers, and the quality and the service life of the high-voltage carbon fiber composite material lead can be greatly improved by the computer-based intelligent rapid nondestructive detection equipment and the detection method which are equipped and industrialized.
Disclosure of Invention
In order to overcome the defects, the invention provides equipment and a method for nondestructive testing of a carbon fiber composite core wire core rod, wherein the equipment comprises: the device comprises an excitation probe, a lead positioning device, an oscillation signal pickup probe and an oscillation signal analyzer. After positioning a lead to be detected, adopting an excitation probe to emit vibration waves with specific frequency to radiate a composite material core rod in the lead; and collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, and forming a continuous spectrum by using the signals collected by the pickup probe and carrying out digital processing. Finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected. The equipment can be widely applied to nondestructive testing of the carbon fiber composite material lead core rod, the analysis process is quick and convenient, the detection process is convenient, the problem of no damage to the core rod is solved, and the analysis process of the composite material lead core rod can be comprehensively tracked and guaranteed.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe, a lead positioning device, an oscillation signal pickup probe and an oscillation signal analyzer, wherein the excitation probe, the lead positioning device, the oscillation signal pickup probe and the oscillation signal analyzer are sequentially arranged, an oscillation wave which is emitted by the excitation probe and has a specific frequency is transmitted to the oscillation signal pickup probe after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device, and the oscillation signal pickup probe is connected with the oscillation signal analyzer.
Preferably, the frequency of the oscillating wave is in the range of 100-100000 Hz.
Preferably, the oscillation signal pickup probe is a frequency spectrum detector capable of detecting ultrasonic signals transmitted by the core rod, and the detector can detect acoustic wave feedback signals transmitted by the excitation probe and transmitted by the carbon fiber composite material lead core rod.
Preferably, the oscillation signal analyzer is provided with specific signal analysis system software, the software is matched with a specific characteristic spectrum database, digital spectrums of the characteristic sound wave signals of the carbon fiber composite core rod with different structural characteristics are stored in the database, and the digital spectrums of the core rod in the database can be quickly adjusted through the software to be compared.
Preferably, the digitized spectrum database is built through a large number of early-stage test results, wherein the digitized spectrum database comprises a standard signal digital spectrum and digitized spectrum data of a characteristic damage core rod. When the detection is carried out, the acoustic signal emitted by the excitation probe radiates a sample to be detected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe, the sensed signal is digitized and then is led into analysis software, the analysis software calls a standard non-damage digital signal map in a database for comparison and analysis, the analyzed result is rapidly matched with the characteristic damage digital map, the damage characteristic of the sample to be detected is finally determined, and the final conclusion of the damage problem is obtained.
The invention also provides a nondestructive testing method of the carbon fiber composite core wire core rod, which comprises the following steps:
fixing a carbon fiber composite core wire core rod on a wire positioning device;
adopting an excitation probe to emit vibration waves with specific frequency to radiate the composite material core rod in the lead;
collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, forming a continuous spectrum by using the signals collected by the pickup probe, and carrying out digital processing;
finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected.
Preferably, the frequency of the oscillating wave is in the range of 100-100000 Hz.
Preferably, the digitized spectrum database is built through a large number of early-stage test results, wherein the digitized spectrum database comprises a standard signal digital spectrum and digitized spectrum data of a characteristic damage core rod. When the detection is carried out, the acoustic signal emitted by the excitation probe radiates a sample to be detected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe, the sensed signal is digitized and then is led into analysis software, the analysis software calls a standard non-damage digital signal map in a database for comparison and analysis, the analyzed result is rapidly matched with the characteristic damage digital map, the damage characteristic of the sample to be detected is finally determined, and the final conclusion of the damage problem is obtained.
The invention has the advantages of
(1) The nondestructive testing equipment adopts the ultrasonic signal with specific frequency to carry out micro-damage detection on the composite material core rod high-voltage wire with the multilayer structure, can carry out damage condition detection on the core rod in the wire under the condition of no direct contact, can carry out quick detection on micro-damages on the surface, the inside and different positions of the core rod and the core part, can also carry out damage tracking analysis on the core rod under dynamic conditions such as installation and transportation, and has the excellent effects of quickness and convenience.
(2) The detection equipment is linked with the core rod damage characteristic database which is built by self, can carry out rapid comparison and analysis on the damage characteristics of the carbon fiber composite core rods with different structural characteristics, finds different structural damage problems, and has the advantage of intelligent rapid analysis.
(3) The preparation method is simple, high in detection efficiency, strong in practicability and easy to popularize.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural diagram of a nondestructive testing system for a carbon fiber composite core wire core rod, which includes four parts of an excitation probe 1, a wire positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein a sample core rod 5 for detection is fixed on the positioning device 2, the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4, and the oscillation signal analyzer is equipped with a computer and intelligently analyzes a defect spectrum of a sound wave signal through special analysis spectrum comparison software.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
A nondestructive testing apparatus and method for a carbon fiber composite core wire core rod, the apparatus comprising: the device comprises an excitation probe, a lead positioning device, an oscillation signal pickup probe and an oscillation signal analyzer. After positioning a lead to be detected, adopting an excitation probe to emit vibration waves with specific frequency to radiate a composite material core rod in the lead; and collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, and forming a continuous spectrum by using the signals collected by the pickup probe and carrying out digital processing. Finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected. The equipment can be widely applied to nondestructive testing of the carbon fiber composite material lead core rod, the analysis process is quick and convenient, the detection process is convenient, the problem of no damage to the core rod is solved, and the analysis process of the composite material lead core rod can be comprehensively tracked and guaranteed.
The excitation probe is an oscillator capable of emitting sound waves with specific frequency, and the frequency of the emitted sound waves is in the range of 100-100000 Hz.
The oscillation signal pickup probe is a frequency spectrum detector capable of detecting ultrasonic signals transmitted by the core rod, and the detector can detect acoustic wave feedback signals transmitted by the excitation probe and transmitted by the carbon fiber composite material lead core rod.
The oscillation signal analyzer is provided with specific signal analysis system software which is matched with a specific characteristic spectrogram database. Digital image spectrums of the characteristic sound wave signals of the carbon fiber composite core rod with different structural characteristics are stored in the database, and the digital image spectrums of the core rod in the database can be quickly adjusted through software to be compared.
The digital spectrum database is built through a large number of early-stage test results, and comprises a standard signal digital spectrum and digital spectrum data of a characteristic damage core rod. When the detection is carried out, the acoustic signal emitted by the excitation probe radiates a sample to be detected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe, the sensed signal is digitized and then is led into analysis software, the analysis software calls a standard non-damage digital signal map in a database for comparison and analysis, the analyzed result is rapidly matched with the characteristic damage digital map, the damage characteristic of the sample to be detected is finally determined, and the final conclusion of the damage problem is obtained.
Example 1
The equipment is used for carrying out nondestructive testing on the carbon fiber composite material lead core rod, and the specific implementation mode is as follows:
(1) fixing the composite material core rod on a positioning test bed to ensure that the radiation end of the excitation probe, the part to be tested of the test core rod sample and the receiving end of the signal pickup probe are on the same horizontal line;
(2) starting a power supply of an excitation probe and a power supply of a signal pickup probe, transmitting a sound wave signal with specific frequency of 1000Hz, starting signal comparison analysis software of an oscillation signal analyzer, and recording sound wave transmission signals at different positions of a specific core rod sample;
(3) and after the recording of the transmitted sound wave signals is finished, comparing and analyzing the sound wave signals with a digital signal spectrogram of a standard non-defective core rod by adopting signal comparison and analysis software, recording the numerical signal difference of a specific position and obtaining a corresponding defect problem conclusion.
Example 2
The utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe 1, a lead positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein the excitation probe 1, the lead positioning device 2, the oscillation signal pickup probe 3 and the oscillation signal analyzer 4 are sequentially arranged, the excitation probe 1 transmits vibration waves with specific frequency to the oscillation signal pickup probe 3 after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device 2, and the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4.
Example 3
The utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe 1, a lead positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein the excitation probe 1, the lead positioning device 2, the oscillation signal pickup probe 3 and the oscillation signal analyzer 4 are sequentially arranged, the excitation probe 1 transmits vibration waves with specific frequency to the oscillation signal pickup probe 3 after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device 2, and the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4.
The frequency of the oscillating wave is in the range of 100-100000 Hz.
Example 4
The utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe 1, a lead positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein the excitation probe 1, the lead positioning device 2, the oscillation signal pickup probe 3 and the oscillation signal analyzer 4 are sequentially arranged, the excitation probe 1 transmits vibration waves with specific frequency to the oscillation signal pickup probe 3 after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device 2, and the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4.
The oscillation signal pickup probe 3 is a frequency spectrum detector capable of detecting ultrasonic signals transmitted by the core rod, and the detector can detect acoustic wave feedback signals transmitted by the excitation probe 1 and transmitted by the carbon fiber composite material lead core rod.
Example 5
The utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe 1, a lead positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein the excitation probe 1, the lead positioning device 2, the oscillation signal pickup probe 3 and the oscillation signal analyzer 4 are sequentially arranged, the excitation probe 1 transmits vibration waves with specific frequency to the oscillation signal pickup probe 3 after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device 2, and the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4.
The oscillation signal analyzer 4 is provided with specific signal analysis system software which is matched with a specific characteristic spectrum database, digital spectrum of the characteristic sound wave signals of the carbon fiber composite core rod with different structural characteristics is stored in the database, and the digital spectrum of the core rod in the database can be quickly adjusted through the software to be compared.
Example 6
The utility model provides a nondestructive test equipment of carbon fiber composite core wire plug, includes: the device comprises an excitation probe 1, a lead positioning device 2, an oscillation signal pickup probe 3 and an oscillation signal analyzer 4, wherein the excitation probe 1, the lead positioning device 2, the oscillation signal pickup probe 3 and the oscillation signal analyzer 4 are sequentially arranged, the excitation probe 1 transmits vibration waves with specific frequency to the oscillation signal pickup probe 3 after passing through a carbon fiber composite core lead core rod arranged on the lead positioning device 2, and the oscillation signal pickup probe 3 is connected with the oscillation signal analyzer 4.
The digital spectrum database is built through a large number of early-stage test results, and comprises a standard signal digital spectrum and digital spectrum data of a characteristic damage core rod. When the detection is carried out, the acoustic signal emitted by the excitation probe 1 radiates a sample to be detected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe 3, the sensed signal is digitized and then is led into analysis software, the analysis software calls a standard non-damage digital signal map in a database for comparison and analysis, the analyzed result is rapidly matched with the characteristic damage digital map, the damage characteristic of the sample to be detected is finally determined, and the final conclusion of the damage problem is obtained.
Example 7
A nondestructive testing method for a carbon fiber composite core wire core rod comprises the following steps:
fixing a carbon fiber composite core wire core rod on a wire positioning device;
adopting an excitation probe to emit vibration waves with specific frequency to radiate the composite material core rod in the lead;
collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, forming a continuous spectrum by using the signals collected by the pickup probe, and carrying out digital processing;
finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected.
The frequency of the oscillating wave is in the range of 100-100000 Hz.
Example 8
A nondestructive testing method for a carbon fiber composite core wire core rod comprises the following steps:
fixing a carbon fiber composite core wire core rod on a wire positioning device;
adopting an excitation probe to emit vibration waves with specific frequency to radiate the composite material core rod in the lead;
collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, forming a continuous spectrum by using the signals collected by the pickup probe, and carrying out digital processing;
finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the specific position of the core rod is detected.
The frequency of the oscillating wave is in the range of 100-100000 Hz.
The digital spectrum database is built through a large number of early-stage test results, and comprises a standard signal digital spectrum and digital spectrum data of a characteristic damage core rod. When the detection is carried out, the acoustic signal emitted by the excitation probe radiates a sample to be detected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe, the sensed signal is digitized and then is led into analysis software, the analysis software calls a standard non-damage digital signal map in a database for comparison and analysis, the analyzed result is rapidly matched with the characteristic damage digital map, the damage characteristic of the sample to be detected is finally determined, and the final conclusion of the damage problem is obtained.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. A nondestructive testing method for a carbon fiber composite core wire core rod is characterized in that the method is carried out in nondestructive testing equipment for the carbon fiber composite core wire core rod, and the equipment comprises: the device comprises an excitation probe, a lead positioning device, an oscillation signal pickup probe and an oscillation signal analyzer, wherein the excitation probe, the lead positioning device, the oscillation signal pickup probe and the oscillation signal analyzer are sequentially arranged;
the frequency of the vibration wave is in the range of 100-100000 Hz;
the oscillation signal pickup probe is a frequency spectrum detector capable of detecting ultrasonic signals transmitted by the core rod, and the detector can detect acoustic wave feedback signals transmitted by the excitation probe and transmitted by the carbon fiber composite material lead core rod;
fixing a carbon fiber composite core wire core rod on a wire positioning device;
radiating the composite material core rod in the lead by adopting vibration waves emitted by an excitation probe;
collecting the transmitted feedback oscillation wave signals by using an oscillation signal pickup probe, forming a continuous spectrum by using the signals collected by the pickup probe, and carrying out digital processing;
finally, the processed signal map is compared and analyzed with the standard digital map through an oscillation signal analyzer, and an analysis result is obtained through database analysis software, so that the damage condition of the core rod is detected.
2. The method according to claim 1, wherein the oscillation signal analyzer is provided with signal analysis system software, the signal analysis system software is matched with the characteristic spectrum database, digitized spectrums of the characteristic sound wave signals of the carbon fiber composite core rod with different structural characteristics are stored in the database, and the digitized spectrums of the core rod in the database can be quickly retrieved through the signal analysis system software for comparison.
3. The method of claim 2, wherein the database of feature spectra is created from a plurality of prior test results, including a standard signal digital spectrum and digitized spectral data of a feature damage kernel.
4. The method as claimed in claim 1, wherein when performing the inspection, the acoustic signal emitted by the excitation probe radiates the sample to be inspected, when the transmitted acoustic signal is sensed by the oscillation signal pickup probe, the sensed signal is digitized and then introduced into the database analysis software, the database analysis software calls the standard non-destructive digital signal map in the database for comparison analysis, the analyzed result is rapidly matched with the characteristic damage digital map, and finally the damage characteristic of the sample to be inspected is determined to obtain the final conclusion of the damage problem.
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