CN102331545A - Method for realizing online cable identification by injecting asymmetric square signal - Google Patents
Method for realizing online cable identification by injecting asymmetric square signal Download PDFInfo
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- CN102331545A CN102331545A CN201110253941A CN201110253941A CN102331545A CN 102331545 A CN102331545 A CN 102331545A CN 201110253941 A CN201110253941 A CN 201110253941A CN 201110253941 A CN201110253941 A CN 201110253941A CN 102331545 A CN102331545 A CN 102331545A
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Abstract
The invention discloses a method for realizing online cable identification by injecting an asymmetric square signal. The method comprises the following steps of: casing a power signal generator at one end of a cable in a cable group at a detection point; injecting a source signal of asymmetric square signal current into the cable; detecting the signal of each cable with a phase detector at another detection point; judging the duration of a positive half wave and the duration of a negative half wave of a sampling signal; comparing the sampling signal with the source signal; judging that the same cable is in use if the direction of the sampling signal is the same as that of the source signal; and judging that different cables are in use if the direction of the sampling signal is opposite to that of the source signal. The method has the advantages: the comparison of numerical values in an original judging mode is changed or simplified, and a positive or negative judging mode is adopted, so that discrimination is easy during comparison and analysis, high accuracy is achieved, and the practical requirements of easiness and intuition on group operation are met.
Description
Technical field
The present invention relates to the cable recognition methods, specifically, relate to a kind of the employing and inject the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION.
Background technology
In China, power cable is laid from dropping into practical applications extensive power cable network till now the earliest, and the history in twenty or thirty year has been arranged.The limitation that is limited to management, the early stage power cable network of laying does not mostly have drawing to retain, and therefore, cable is dug disconnected situation and is happened occasionally in the road construction process.From the requirement of the power cable network being protected and the computer information system of standardizing is managed, the power cable of studying accurately and reliably, conveniently implementing detects recognition methods and seems particularly important.
In real work, because phase shielded armor two ends all are ground connection, so just constituted a path between unit cable armor and the ground; Simultaneously because all cable armors ground connection all; So also can constitute a path between the armor of per two cables; Be a kind of pick-up unit that carries out the cable under test full-characteristic analysis at a distance of ZL200820109257.0 like publication number; A kind of pick-up unit that carries out the cable under test full-characteristic analysis at a distance; Employing to voltage, electric current, amplitude, direction and the phase signal of target cable carry out full characteristic sampling analysis and and source signal compare and carry out the identification of cable; Have that multiple signals are gathered simultaneously, high accuracy identification homology consubstantiality transmits signal and homology allosome induced interference signal under powering-off state not, and the uniqueness that carries the working condition evaluation is discerned the advantage of cable under test.Load the sound signal of fixed frequency to cable through emitter; Whole signals of these all cables of block of disposable collection in the test side then; Receiving trap carries out processing such as filtering, amplification after obtaining above-mentioned signal; Getting signal that equals transmission frequency and the reference signal that produces through simultaneous techniques compares; Through digital processing, relatively calculate after, respectively organized signal current value, each loop resistance value, each acquired signal phasing degree and and the phase deviation degree of reference signal, the cable that has same characteristic features with the known cable reference signal is target cable.But this apparatus structure is complicated, the technical operation difficulty is big, and have relatively high expectations to operating personnel's technical requirement and condition of work in comparative voltage, electric current, amplitude, direction and phasing degree simultaneously.Simultaneously because in real work, the structure and the length of cable have uncertainty, because the spiral-shaped structure of cable armouring metal level; Inductive impact and capacitive effect occur, source signal is produced the influence of drift forward or backward, but this influence can not meet and control; The signal sampling point is generally the crest value or the trough value of sinusoidal signal; Can produce the situation of drift forward or backward equally at sampled point, cause detecting the generation of error, the accuracy that influence detects.
Summary of the invention
The object of the present invention is to provide a kind of the employing to inject the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, can effectively solve the problem that the existing cable recognition methods is had relatively high expectations to operating personnel's technical requirement and condition of work.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme: a kind of employing injected the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, may further comprise the steps successively:
A. on a check point, power signal generator is enclosed within an end of a cable in the cable group, injects the source signal of asymmetric square waves electric current to cable;
B. on another check point, remove to detect the signal of each cable with phase detectors; Judge the duration of sampled signal positive half-wave and the duration of negative half-wave; Compare with source signal; If sampled signal is identical with the source signal direction is same cable, is not same cable if sampled signal and source signal are in the opposite direction.
Preferably, the negative half-wave area of the positive half-wave area of asymmetric square waves electric current equates in the said steps A; Can more convenient detection identification.
Preferably, power signal generator is enclosed within on the cable through hook type current transformer in the said steps A; Can be enclosed within on the test cable source signal of input asymmetric square waves electric current preferably.
Preferably, phase detectors are enclosed within on the tested cable with hook type current transformer and collect sampled signal among the said step B; Can be enclosed within preferably on the tested cable, receive sampled signal.
Compared with prior art; Advantage of the present invention is: simple to operation, only needs are judged the positive half-wave duration and the negative half-wave duration of sampled signal, compare with source signal; Just can tell current signal and be in the same way or reverse; The modulation signal of this method is simple in structure and stable, has changed or simplified the comparison of quantitative value in original judgment model and adopted to be or non-judgment model as easy as rolling off a log examination when comparative analysis; Have very high accuracy, also realized being convenient to the crew-served actual simply and intuitively requirement of a line.
Description of drawings
Fig. 1 adopts for the present invention is a kind of and injects the connection synoptic diagram that the asymmetric square waves signal is realized the method for cable ONLINE RECOGNITION;
Fig. 2 adopts for the present invention is a kind of and injects the oscillogram that the asymmetric square waves signal is realized the method asymmetric square waves electric current of cable ONLINE RECOGNITION.
Embodiment
Consult Fig. 1, Fig. 2 adopt the method for injecting asymmetric square waves signal realization cable ONLINE RECOGNITION for the present invention is a kind of embodiment, a kind of employing injected the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, may further comprise the steps successively:
A. on a check point, power signal generator 1 is enclosed within an end of a cable in the cable group through hook type current transformer 2, injects the source signal of asymmetric square waves electric current to cable, the negative half-wave area of the positive half-wave area of said asymmetric square waves electric current equates;
B. on another check point, remove to detect the signal of each cable with phase detectors 3; Phase detectors are enclosed within on the tested cable with hook type current transformer 2 and collect sampled signal; Judge the duration of sampled signal positive half-wave and the duration of negative half-wave; Comparing with source signal, is same cable if sampled signal is identical with the source signal direction, is not same cable if sampled signal and source signal are in the opposite direction.
Actual laying state and design feature according to China's underground power cable; Draw the advanced technology of current cable detection; Improve wherein defective and deficiency; Special under non-excavation, the condition of work of not stopping transport, realize safety, reliable, rapidly, high accuracy detects the method for the uniqueness of target cable, and verified the validity and the feasibility of this method through experimental prototype; Solve detection means that power department fails effectively to solve for many years, existing and method and also had an open defect and a not enough objective difficult problem; For electric power underground cable generaI investigation, track location, trouble spot search judgement fast, provide effectively, guaranteed reliably; And on the development and Design of device, demonstrated fully the design concept of measuring accuracy, perspective, the on-the-spot adaptability of function, operation point-and-shoot, can be widely used in the accurate identification and the track location of power department underground cable complex working condition.
The above is merely specific embodiment of the present invention, but technical characterictic of the present invention is not limited thereto, and any those skilled in the art is in the field of the invention, and the variation of being done or modify all is encompassed among the claim of the present invention.
Claims (4)
1. one kind is adopted the method for injecting asymmetric square waves signal realization cable ONLINE RECOGNITION, it is characterized in that: may further comprise the steps successively:
A. on a check point, power signal generator (1) is enclosed within an end of a cable in the cable group, injects the source signal of asymmetric square waves electric current to cable;
B. on another check point, remove to detect the signal of each cable with phase detectors (3); Judge the duration of sampled signal positive half-wave and the duration of negative half-wave; Compare with source signal; If sampled signal is identical with the source signal direction is same cable, is not same cable if sampled signal and source signal are in the opposite direction.
2. a kind of employing the as claimed in claim 1 injected the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, it is characterized in that: the negative half-wave area of the positive half-wave area of asymmetric square waves electric current equates in the said steps A.
3. according to claim 1 or claim 2 a kind of adopts and inject the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, it is characterized in that: power signal generator in the said steps A (1) is through the mutual inductance of jaw type electric current
Device (2) is enclosed within on the cable.
4. according to claim 1 or claim 2 a kind of adopts and injects the method that the asymmetric square waves signal is realized the cable ONLINE RECOGNITION, and it is characterized in that: phase detectors among the said step B (3) are with hook type current transformer (2)
Be enclosed within on the tested cable and collect sampled signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110253941A CN102331545A (en) | 2011-08-30 | 2011-08-30 | Method for realizing online cable identification by injecting asymmetric square signal |
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| CN201110253941A CN102331545A (en) | 2011-08-30 | 2011-08-30 | Method for realizing online cable identification by injecting asymmetric square signal |
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| CN201110253941A Pending CN102331545A (en) | 2011-08-30 | 2011-08-30 | Method for realizing online cable identification by injecting asymmetric square signal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735994A (en) * | 2012-07-10 | 2012-10-17 | 浙江图维电力科技有限公司 | Method and device for inputting or detecting non-contact signals based on capacitor sensing |
| CN104537700A (en) * | 2015-01-05 | 2015-04-22 | 浙江图维电力科技有限公司 | Method for establishing signal diagram used for determining two ends of same cable |
| CN105629113A (en) * | 2016-02-19 | 2016-06-01 | 中国三冶集团有限公司 | Cable remote-sensing recognition device and method in complex environment |
| CN107037263A (en) * | 2017-04-20 | 2017-08-11 | 国网辽宁省电力有限公司抚顺供电公司 | Phase angle cable identifier |
| CN108505519A (en) * | 2017-02-27 | 2018-09-07 | 利勃海尔南兴有限公司 | The method of cognitive disorders object in the operating process of vibreatory hammer |
| CN110618342A (en) * | 2019-09-04 | 2019-12-27 | 武汉鸿志高测电气技术有限公司 | Cable identification device and method |
| CN112098901A (en) * | 2020-08-12 | 2020-12-18 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735994A (en) * | 2012-07-10 | 2012-10-17 | 浙江图维电力科技有限公司 | Method and device for inputting or detecting non-contact signals based on capacitor sensing |
| CN102735994B (en) * | 2012-07-10 | 2016-05-25 | 浙江图维科技股份有限公司 | A kind of input based on capacitance sensing non-contact signal or the method and apparatus detecting |
| CN104537700A (en) * | 2015-01-05 | 2015-04-22 | 浙江图维电力科技有限公司 | Method for establishing signal diagram used for determining two ends of same cable |
| CN104537700B (en) * | 2015-01-05 | 2017-12-26 | 浙江图维科技股份有限公司 | For the creation method for the signal graph for determining same cable both ends |
| CN105629113A (en) * | 2016-02-19 | 2016-06-01 | 中国三冶集团有限公司 | Cable remote-sensing recognition device and method in complex environment |
| CN105629113B (en) * | 2016-02-19 | 2018-05-18 | 中国三冶集团有限公司 | Cable remote sensing recognition device and recognition methods under a kind of complex environment |
| CN108505519A (en) * | 2017-02-27 | 2018-09-07 | 利勃海尔南兴有限公司 | The method of cognitive disorders object in the operating process of vibreatory hammer |
| CN107037263A (en) * | 2017-04-20 | 2017-08-11 | 国网辽宁省电力有限公司抚顺供电公司 | Phase angle cable identifier |
| CN110618342A (en) * | 2019-09-04 | 2019-12-27 | 武汉鸿志高测电气技术有限公司 | Cable identification device and method |
| CN112098901A (en) * | 2020-08-12 | 2020-12-18 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
| CN112098901B (en) * | 2020-08-12 | 2022-10-28 | 深圳供电局有限公司 | Cable identification method and device, computer equipment and readable storage medium |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20121106 |
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Effective date of registration: 20121106 Address after: 313000 Phoenix Road, Zhejiang, Huzhou, No. 777 Applicant after: Huzhou Power Office Applicant after: State Grid Corporation of China Address before: 313000 Phoenix Road, Zhejiang, Huzhou, No. 777 Applicant before: Huzhou Power Office |
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Application publication date: 20120125 |