CN102331545A - A Method of Realizing Cable Online Identification by Injecting Asymmetric Square Wave Signal - Google Patents
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Abstract
本发明公开了一种采用注入非对称方波信号实现电缆在线识别的方法，在一个检测点上将功率信号发生器套在电缆组中一根电缆的一端，向电缆注入非对称方波电流的源信号，在另一个检测点上用相位检测器去检测各个电缆的信号，判断采样信号正半波的持续时间和负半波的持续时间，和源信号进行对比，如果采样信号与源信号方向相同则为同一根电缆，如果采样信号与源信号方向相反则不是同一根电缆。本发明的优点是：改变或简化了原有判断模式中数量值的比较而采用是或非的判断模式，在比较分析时极容易甄别，具有很高的准确性，也实现了便于一线班组操作的简单、直观的实际要求。
The invention discloses a method for realizing online identification of cables by injecting an asymmetrical square wave signal. At a detection point, a power signal generator is placed on one end of a cable in a cable group, and an asymmetrical square wave current is injected into the cable. For the source signal, use a phase detector to detect the signals of each cable at another detection point, judge the duration of the positive half-wave and the negative half-wave of the sampling signal, and compare it with the source signal. If the sampling signal is in the same direction as the source signal If they are the same, it is the same cable, and if the sampling signal is in the opposite direction to the source signal, then it is not the same cable. The present invention has the advantages of changing or simplifying the comparison of quantitative values in the original judgment mode and adopting the judgment mode of yes or no, which is very easy to distinguish when comparing and analyzing, has high accuracy, and also realizes the convenience of front-line team operation Simple and intuitive practical requirements.
Description
技术领域 technical field
本发明涉及电缆识别方法，具体的说，是涉及一种采用注入非对称方波信号实现电缆在线识别的方法。The invention relates to a cable identification method, in particular to a method for realizing online cable identification by injecting an asymmetrical square wave signal.
背景技术 Background technique
在我国，电力电缆从最早投入工程应用到现在的大规模电力电缆网络铺设，已经有二三十年的历史。限于管理的局限性，早期铺设的电力电缆网络大都没有图纸存留，因此，在道路施工过程中电缆被挖断的情况时有发生。出于对电力电缆网络进行保护和规范化计算机信息系统管理的要求，研究准确可靠、方便实施的电力电缆检测识别方法显得尤为重要。In our country, power cables have a history of 20 or 30 years from the earliest engineering application to the current large-scale power cable network laying. Due to the limitations of management, most of the power cable networks laid in the early days did not have drawings. Therefore, cables were often cut off during road construction. In order to protect the power cable network and standardize the management of computer information systems, it is particularly important to study accurate, reliable and easy-to-implement power cable detection and identification methods.
在实际工作中，由于三相屏蔽铠甲两端都是接地的，于是单根电缆铠甲和地之间就构成了一个通路；同时由于所有电缆铠甲都接地，所以每两根电缆的铠甲之间也会构成一个通路，如公开专利号为ZL200820109257.0的一种远距离进行待测电缆全特征分析的检测装置，一种远距离进行待测电缆全特征分析的检测装置，采用对目标电缆的电压、电流、幅值、方向和相位信号进行全特征采样分析并和源信号进行比对进行电缆的识别，具有多路信号同时采集、在不断电情况下高准确性识别同源同体传递信号与同源异体感应干扰信号，以及自带工况条件评定的唯一性识别待测电缆的优点。通过发射装置向电缆加载固定频率的音频信号，然后在检测端一次性采集该区块所有电缆的全部信号，接收装置在获取上述信号后进行滤波、放大等处理，取等于发射频率的信号与通过同步技术产生的基准信号进行比较，经数字处理、比较计算后，得到各组信号的电流值、各回路电阻值、各采集信号相位角及其和基准信号的相位偏移度，与已知电缆基准信号具有相同特征的电缆即为目标电缆。但该装置结构复杂、技术操作难度大，须同时比较电压、电流、幅值、方向和相位角，对操作人员的技术要求和工作条件要求较高。同时由于在实际工作中，电缆的结构和长度具有不确定性，由于电缆铠装金属层的螺旋型结构，出现电感影响和电容影响，对源信号产生向前或向后漂移的影响，但该影响是不可遇见和控制的，信号采样点一般为正弦信号的波峰值或波谷值，在采样点同样会产生向前或向后漂移的情况，导致检测误差的产生，影响检测的准确度。In actual work, since both ends of the three-phase shielding armor are grounded, a path is formed between a single cable armor and the ground; at the same time, since all cable armors are grounded, there is also a gap between the armor of every two cables. A channel will be formed, such as a detection device for long-distance full-feature analysis of the cable to be tested with the public patent number ZL200820109257.0, a detection device for long-distance full-feature analysis of the cable to be tested, using the voltage , current, amplitude, direction and phase signals for full-feature sampling analysis and comparison with the source signal for cable identification, with simultaneous acquisition of multiple signals, high-accuracy identification of homologous and homogeneous transmission signals and the same in the case of continuous power supply The advantages of the source heterogeneous induction interference signal, and the unique identification of the cable under test with its own working condition evaluation. Load a fixed-frequency audio signal to the cable through the transmitting device, and then collect all the signals of all the cables in the block at the detection end at one time, and the receiving device performs filtering, amplification and other processing after obtaining the above-mentioned signal, and takes the signal equal to the transmitting frequency and passes through The reference signal generated by the synchronization technology is compared. After digital processing and comparison calculation, the current value of each group of signals, the resistance value of each loop, the phase angle of each acquisition signal and the phase offset with the reference signal are obtained. The cable with the same characteristics as the reference signal is the target cable. However, the structure of the device is complicated and the technical operation is difficult, and the voltage, current, amplitude, direction and phase angle must be compared at the same time, which requires high technical requirements and working conditions for the operator. At the same time, due to the uncertainty of the structure and length of the cable in actual work, due to the helical structure of the cable armored metal layer, there will be inductance and capacitance effects, which will affect the forward or backward drift of the source signal, but this The influence cannot be met and controlled. The signal sampling point is generally the peak value or valley value of the sinusoidal signal. The sampling point will also drift forward or backward, resulting in detection error and affecting the accuracy of detection.
发明内容 Contents of the invention
本发明的目的在于提供一种采用注入非对称方波信号实现电缆在线识别的方法，能够有效解决现有电缆识别方法对操作人员的技术要求和工作条件要求较高的问题。The purpose of the present invention is to provide a method for realizing online identification of cables by injecting asymmetrical square wave signals, which can effectively solve the problem that existing cable identification methods have higher technical requirements and working conditions for operators.
为了解决上述技术问题，本发明是通过以下技术方案实现的：一种采用注入非对称方波信号实现电缆在线识别的方法，依次包括以下步骤：In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions: a method for realizing cable online identification by injecting an asymmetrical square wave signal, comprising the following steps in turn:
A.在一个检测点上将功率信号发生器套在电缆组中一根电缆的一端，向电缆注入非对称方波电流的源信号；A. Set the power signal generator on one end of a cable in the cable group at a detection point, and inject a source signal of an asymmetrical square wave current into the cable;
B.在另一个检测点上用相位检测器去检测各个电缆的信号，判断采样信号正半波的持续时间和负半波的持续时间，和源信号进行对比，如果采样信号与源信号方向相同则为同一根电缆，如果采样信号与源信号方向相反则不是同一根电缆。B. Use a phase detector to detect the signals of each cable at another detection point, judge the duration of the positive half-wave and the negative half-wave of the sampling signal, and compare it with the source signal. If the sampling signal is in the same direction as the source signal Then it is the same cable, if the sampling signal is in the opposite direction to the source signal then it is not the same cable.
优选的，所述步骤A中非对称方波电流的正半波面积负半波面积相等；能更方便检测识别。Preferably, the positive half-wave area and the negative half-wave area of the asymmetrical square wave current in the step A are equal; it is more convenient for detection and identification.
优选的，所述步骤A中功率信号发生器通过钳式电流互感器套在电缆上；能够较好的套在测试电缆上，输入非对称方波电流的源信号。Preferably, in the step A, the power signal generator is set on the cable through a clamp-type current transformer; it can be well set on the test cable and input the source signal of an asymmetrical square wave current.
优选的，所述步骤B中相位检测器用钳式电流互感器套在被测电缆上收集采样信号；能较好的套在被测电缆上，接收采样信号。Preferably, in the step B, the phase detector is set on the tested cable with a clamp-type current transformer to collect the sampling signal; it can be better set on the tested cable to receive the sampling signal.
与现有技术相比，本发明的优点是：操作简单方便，只需要判断采样信号的正半波持续时间和负半波持续时间，与源信号进行对比，就可以分辨出电流信号是同向还是反向，该方法的调制信号结构简单且稳定，改变或简化了原有判断模式中数量值的比较而采用是或非的判断模式，在比较分析时极容易甄别，具有很高的准确性，也实现了便于一线班组操作的简单、直观的实际要求。Compared with the prior art, the advantages of the present invention are: the operation is simple and convenient, only need to judge the positive half-wave duration and the negative half-wave duration of the sampling signal, and compare with the source signal, it can be distinguished that the current signal is in the same direction Or in the opposite direction, the modulating signal structure of this method is simple and stable, and the comparison of the numerical value in the original judgment mode is changed or simplified, and the judgment mode of yes or no is adopted, which is very easy to distinguish during comparison and analysis, and has high accuracy , It also realizes the simple and intuitive practical requirements that are convenient for the front-line team to operate.
附图说明 Description of drawings
图1为本发明一种采用注入非对称方波信号实现电缆在线识别的方法的连接示意图；Fig. 1 is a connection schematic diagram of a method for realizing cable online identification by injecting an asymmetrical square wave signal according to the present invention;
图2为本发明一种采用注入非对称方波信号实现电缆在线识别的方法中非对称方波电流的波形图。Fig. 2 is a waveform diagram of an asymmetrical square wave current in a method for realizing cable online identification by injecting an asymmetrical square wave signal according to the present invention.
具体实施方式 Detailed ways
参阅图1、图2为本发明一种采用注入非对称方波信号实现电缆在线识别的方法的实施例，一种采用注入非对称方波信号实现电缆在线识别的方法，依次包括以下步骤：Referring to Fig. 1, Fig. 2 is the embodiment of a kind of method that adopts injecting asymmetrical square wave signal to realize cable online identification of the present invention, a kind of method that adopts injecting asymmetrical square wave signal to realize cable online identification, comprises the following steps successively:
A.在一个检测点上将功率信号发生器1通过钳式电流互感器2套在电缆组中一根电缆的一端，向电缆注入非对称方波电流的源信号，所述非对称方波电流的正半波面积负半波面积相等；A. Set the power signal generator 1 at one end of a cable in the cable group through the clamp-type current transformer 2 at a detection point, and inject a source signal of an asymmetrical square wave current into the cable, and the asymmetrical square wave current The positive half-wave area of the negative half-wave area is equal;
B.在另一个检测点上用相位检测器3去检测各个电缆的信号，相位检测器用钳式电流互感器2套在被测电缆上收集采样信号，判断采样信号正半波的持续时间和负半波的持续时间，和源信号进行对比，如果采样信号与源信号方向相同则为同一根电缆，如果采样信号与源信号方向相反则不是同一根电缆。B. Use the phase detector 3 to detect the signals of each cable at another detection point. The phase detector uses a clamp-type current transformer 2 to collect the sampling signal on the cable under test, and judge the duration of the positive half-wave of the sampling signal and the negative The duration of the half wave is compared with the source signal. If the sampling signal is in the same direction as the source signal, it is the same cable. If the sampling signal is in the opposite direction to the source signal, it is not the same cable.
根据我国地下电力电缆的实际敷设情况和结构特点，吸取当前电缆检测的先进技术，改进其中的缺陷和不足，专门针对在非开挖、不停运的工作条件下，实现安全、可靠、迅速、高准确性检测目标电缆的唯一性的方法，并通过实验样机验证了本方法的有效性和可行性；解决了电力部门多年来未能有效解决的、现有检测手段和方法也带有明显缺陷和不足的客观难题，为电力地下电缆普查、轨迹定位、故障点的快速查找判断，提供了有效、可靠的保证；并且在装置的开发设计上，充分体现了测量准确性、功能前瞻性、现场适应性、操作傻瓜型的设计理念，可广泛用于电力部门地下电缆复杂工况的准确识别和轨迹定位。According to the actual laying conditions and structural characteristics of underground power cables in China, absorb the current advanced technology of cable detection, improve the defects and deficiencies, and specifically aim at achieving safe, reliable, rapid, It is a method to detect the uniqueness of the target cable with high accuracy, and the effectiveness and feasibility of this method are verified by the experimental prototype; it solves the problems that the power sector has not effectively solved for many years, and the existing detection methods and methods also have obvious defects The objective problem of insufficiency provides an effective and reliable guarantee for the general survey of electric power underground cables, track location, and quick search and judgment of fault points; and in the development and design of the device, it fully reflects the accuracy of measurement, forward-looking functions, and The design concept of adaptability and fool-proof operation can be widely used in the accurate identification and track positioning of complex working conditions of underground cables in the power sector.
以上所述仅为本发明的具体实施例，但本发明的技术特征并不局限于此，任何本领域的技术人员在本发明的领域内，所作的变化或修饰皆涵盖在本发明的专利范围之中。The above is only a specific embodiment of the present invention, but the technical characteristics of the present invention are not limited thereto, any changes or modifications made by those skilled in the art within the field of the present invention are covered by the patent scope of the present invention among.
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| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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, apparatus, computer device and readable storage medium |
| CN112098901B (en) * | 2020-08-12 | 2022-10-28 | 深圳供电局有限公司 | Cable identification method, apparatus, computer equipment and readable storage medium |
| CN114924120A (en) * | 2022-06-16 | 2022-08-19 | 广东电网有限责任公司 | Ground wire, ground wire signal detection method and system |
| CN116148721A (en) * | 2023-01-19 | 2023-05-23 | 广州赛力迪科技有限公司 | Cable identification method and device based on phase modulation signals and electronic equipment |
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