CN105319229A - Defect detecting method and system of high voltage buried cables - Google Patents
Defect detecting method and system of high voltage buried cables Download PDFInfo
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- CN105319229A CN105319229A CN201410353849.7A CN201410353849A CN105319229A CN 105319229 A CN105319229 A CN 105319229A CN 201410353849 A CN201410353849 A CN 201410353849A CN 105319229 A CN105319229 A CN 105319229A
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Abstract
The invention discloses a defect detecting method and a system of high voltage buried cables. The defect detecting method comprises following steps: ultra-wideband communication signals are send to a detection zone, and return signals of the ultra-wideband communication signals are received; the return signals are subjected to pretreatment; the return signals obtained via pretreatment are subjected to imaging processing so as to form profile images; and it is determined whether detected high voltage buried cables possess defects based on the difference of return signal intensity of different parts of the profile images. According to the defect detecting method and the system of high voltage buried cables, ultra-wideband communication technology is adopted, non-invasive detection of the high voltage buried cables is carried out, applying of additional electrical signals or light signals on the high voltage buried cables is not needed, normal operation of the high voltage buried cables is not influenced; penetrating of obstacles with a certain thickness, such as the ground, can be realized, cable detection can be carried out in the presence of obstacles, and imaging and defect detecting of a plurality of buried equipment can be realized.
Description
Technical field
The present invention relates to ultra wide band radio signal Detection Techniques field in the communications field, particularly, the defect inspection method of the buried cable of a kind of high pressure related to and system.
Background technology
In power grid construction and retrofit work, many areas have employed underground cable, simultaneously in order to grasp power cable service data and transmit important control signal, also deploy buried cable signal.Wherein underground cable polyvinyl chloride ambroin electric wire and optical cable have good chemical stability, and have many advantages such as security of operation, reduction line loss.But after Long-Time Service, with continuing to increase of infrastructure construction dynamics, the buried cable fault that third party's outside destroy causes is increasing, above buried cable, repeat construction, lay water pipe, build water channel, tree planting, building constructions thing etc., often very easily damage underground line insulation course, many power supply stations are local has fault to occur.Therefore how to find out trouble spot fast and accurately, fix a breakdown in time, just become each power department to realize service promise, win the confidence and the people, and advanced the task of top priority of electric network reconstruction progress.
Existing cable failure tester need apply high-voltage pulse signal in cable, needs test loop whether to there is fault and forms high-voltage pulse fault offset loop, if cable non-fault, also may cause latent lesion to cable; Need will close on cable power-off during test, power failure coverage is larger simultaneously.
Existing ground buried fiber optic cable detects need apply light signal on the line, defective locations is judged by the reflection of fault place light signal, but owing to can leave certain optical fiber surplus for later stage O&M when optical cable is disposed, and result affects by cable bend degree, and test result exists certain error; Simultaneously due to test signal need be applied in cable, also certain influence can be there is to proper communication.
Existing cable detection technique needs to apply extra to cable more, there is impact to the normal operation of cable; And cable detection need apply high voltage transient signal to cable, strongly professional, require higher to maintainer's professional ability, there is certain personal safety hidden danger.
Summary of the invention
In order to solve the inefficient problem of the high pressure existed in prior art buried cable defects detection, the present invention proposes defect inspection method and the system of the buried cable of a kind of high pressure.
The defect inspection method of the buried cable of high pressure according to the present invention, comprising:
Launch super broad band radio communication signal to search coverage, and receive the echoed signal of described super broad band radio communication signal;
Pre-service is carried out to described echoed signal;
Imaging processing is carried out to pretreated described echoed signal and forms contour images;
According to the difference of the diverse location echo strength of described contour images, judge cable whether existing defects.
The defect inspection method of the buried cable of high pressure of the present invention, application the Technology of Ultra, carries out non-invasive detection to the buried cable of high pressure, without the need to applying extra electric signal or light signal to cable, not affecting cable and normally running; And can the barriers such as certain thickness ground be penetrated, the cable that can realize when restraining mass exists detects, and can also extend to imaging and the defects detection of multiple buried facility.
The defect detecting system of the buried cable of high pressure according to the present invention, comprising:
Acquisition of signal module, for launching super broad band radio communication signal to search coverage, and receives the echoed signal of described super broad band radio communication signal;
Signal pre-processing module, for carrying out pre-service to described echoed signal;
Image formation module, forms contour images for carrying out imaging processing to pretreated described echoed signal;
Signal detection module, for the difference of the diverse location echo strength according to described contour images, judges cable whether existing defects.
The defect detecting system of the buried cable of high pressure of the present invention, application the Technology of Ultra, carries out non-invasive detection to the buried cable of high pressure, without the need to applying extra electric signal or light signal to cable, not affecting cable and normally running; And can the barriers such as certain thickness ground be penetrated, the cable that can realize when restraining mass exists detects, and can also extend to imaging and the defects detection of multiple buried facility.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the defects detection schematic diagram of the buried cable of high pressure of the present invention;
Fig. 2 is the workflow diagram of the defect inspection method of the buried cable of high pressure of the present invention;
Fig. 3 is the structural representation of the defect detecting system of the buried cable of high pressure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
In order to solve the inefficient problem of the high pressure existed in prior art buried cable defects detection, the present invention proposes defect inspection method and the system of the buried cable of a kind of high pressure.
As shown in Figure 1, be the detection schematic diagram of the buried cable of high pressure of the present invention.As shown in Figure 2, the defect inspection method of the buried cable of high pressure of the present invention, comprising:
Step S101: launch super broad band radio communication signal to search coverage, and receive the echoed signal of described super broad band radio communication signal;
Concrete, IR-UWB (super broad band radio communication) detectable signal is launched to search coverage, this signal can penetrated surface be radiated buried cable region, when signal runs into buried cable, because cable is different from surrounding environment electrical characteristics, there is reflection or scattering in signal, echoed signal backpropagation, and after penetrated surface, received antenna receives again.Receiving antenna is the aerial array possessing certain pore size, can distinguish echo direction, and when cable existing defects, defect area scattering echo direction is different from normal echo, carries out defects detection whereby.
Step S102: carry out pre-service to described echoed signal, namely carries out pre-service to spacing wave method to the noise of described echoed signal and antenna-coupled ripple according to subtracting;
Concrete, to antenna array receiver to echoed signal carry out pre-service, in detection process, the echoed signal received affects by acquisition environment, and echoed signal not only comprises cable echoed signal, also comprise the noise signal such as noise and antenna-coupled ripple simultaneously, stratum also has certain distortion to IR-UWB signal, has certain influence to analysis result, utilizes to subtract to carry out pre-service to spacing wave method etc. to environmental impact, to alleviate its impact on measurement result, improve accuracy of detection.
Subtracting spacing wave method is a kind of method being eliminated process removal direct wave by background, first without echoed signal during buried cable, record is carried out to subsurface, echoed signal during buried cable is had to carry out record to subsurface afterwards, the two echoed signal is subtracted each other, the echoed signal part that ground itself can be caused is eliminated, and better records the echoed signal that buried cable causes.
Step S103: imaging processing is carried out to pretreated described echoed signal and forms contour images;
Concrete, imaging processing is carried out to the pretreated IR-UWB signal possessing high-resolution features, imaging algorithm is utilized to rebuild target image in surveyed area, after imaging processing, can to the imaging of cable profile, and cable image profiles position and intensity and the position of cable own and scattering strength closely related.
In the present invention, imaging algorithm can adopt known method, as rear orientation projection's imaging algorithm (being not limited thereto) of auto-focusing, does not repeat them here.
Step S104: according to the difference of the diverse location echo strength of described contour images, judges cable whether existing defects;
Concrete, by the difference of the diverse location echo strength of contour images, carry out cable defect dipoles, the functions such as cable detection, location and identification can also be realized simultaneously.
The defect inspection method of the buried cable of high pressure of the present invention, application the Technology of Ultra, carries out non-invasive detection to the buried cable of high pressure, without the need to applying extra electric signal or light signal to cable, not affecting cable and normally running; And can the barriers such as certain thickness ground be penetrated, the cable that can realize when restraining mass exists detects, and can also extend to imaging and the defects detection of multiple buried facility.
As shown in Figure 3, the defect detecting system of the buried cable of high pressure of the present invention, comprising:
Acquisition of signal module 10, for launching super broad band radio communication signal to search coverage, and receives the echoed signal of described super broad band radio communication signal;
Signal pre-processing module 20, for carrying out pre-service to described echoed signal;
Image formation module 30, forms contour images for carrying out imaging processing to pretreated described echoed signal;
Signal detection module 40, for the difference of the diverse location echo strength according to described contour images, judges cable whether existing defects.
In technique scheme, described signal pre-processing module 20 is specifically for carrying out pre-service to spacing wave method to the noise of described echoed signal and antenna-coupled ripple according to subtracting.
In technique scheme, described image formation module 30 is specifically for carrying out imaging processing according to imaging algorithm to pretreated described echoed signal, generate the contour images of cable to be measured, the position of the contour images of described cable to be measured, intensity are determined by the position of cable itself, scattering strength.
The defect detecting system of the buried cable of high pressure of the present invention, application the Technology of Ultra, carries out non-invasive detection to the buried cable of high pressure, without the need to applying extra electric signal or light signal to cable, not affecting cable and normally running; And can the barriers such as certain thickness ground be penetrated, the cable that can realize when restraining mass exists detects, and can also extend to imaging and the defects detection of multiple buried facility.
The present invention can have multiple multi-form embodiment; above for Fig. 1-Fig. 3 by reference to the accompanying drawings to technical scheme of the present invention explanation for example; this does not also mean that the instantiation that the present invention applies can only be confined in specific flow process or example structure; those of ordinary skill in the art should understand; specific embodiments provided above is some examples in multiple its preferred usage, and the embodiment of any embodiment the claims in the present invention all should within technical solution of the present invention scope required for protection.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a defect inspection method for the buried cable of high pressure, is characterized in that, comprising:
Launch super broad band radio communication signal to search coverage, and receive the echoed signal of described super broad band radio communication signal;
Pre-service is carried out to described echoed signal;
Imaging processing is carried out to pretreated described echoed signal and forms contour images;
According to the difference of the diverse location echo strength of described contour images, judge cable whether existing defects.
2. the defect inspection method of the buried cable of high pressure according to claim 1, is characterized in that, describedly carries out pretreated step to described echoed signal and specifically comprises:
According to subtracting, to the noise of described echoed signal and antenna-coupled ripple, pre-service is carried out to spacing wave method.
3. the defect inspection method of the buried cable of high pressure according to claim 1, is characterized in that, describedly carries out imaging processing to pretreated described echoed signal and forms the step of contour images and specifically comprise:
Carry out imaging processing according to imaging algorithm to pretreated described echoed signal, generate the contour images of cable to be measured, the position of the contour images of described cable to be measured, intensity are determined by the position of cable itself, scattering strength.
4. a defect detecting system for the buried cable of high pressure, is characterized in that, comprising:
Acquisition of signal module, for launching super broad band radio communication signal to search coverage, and receives the echoed signal of described super broad band radio communication signal;
Signal pre-processing module, for carrying out pre-service to described echoed signal;
Image formation module, forms contour images for carrying out imaging processing to pretreated described echoed signal;
Signal detection module, for the difference of the diverse location echo strength according to described contour images, judges cable whether existing defects.
5. the defect detecting system of the buried cable of high pressure according to claim 4, is characterized in that, described signal pre-processing module is specifically for carrying out pre-service to spacing wave method to the noise of described echoed signal and antenna-coupled ripple according to subtracting.
6. the defect detecting system of the buried cable of high pressure according to claim 4, it is characterized in that, described image formation module is specifically for carrying out imaging processing according to imaging algorithm to pretreated described echoed signal, generate the contour images of cable to be measured, the position of the contour images of described cable to be measured, intensity are determined by the position of cable itself, scattering strength.
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| CN201410353849.7A CN105319229A (en) | 2014-06-24 | 2014-07-23 | Defect detecting method and system of high voltage buried cables |
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| CN201410353849.7A CN105319229A (en) | 2014-06-24 | 2014-07-23 | Defect detecting method and system of high voltage buried cables |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110988839A (en) * | 2019-12-25 | 2020-04-10 | 中南大学 | Method for quickly identifying health condition of wall based on one-dimensional convolutional neural network |
| CN112595732A (en) * | 2020-12-09 | 2021-04-02 | 西安邮电大学 | Welding spot quality detection method based on ultra-wideband microwave |
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| CN112595732B (en) * | 2020-12-09 | 2023-03-10 | 西安邮电大学 | Welding spot quality detection method based on ultra-wideband microwave |
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Application publication date: 20160210 |