CN203490359U - Portable transformer station noise imaging positioning detecting device - Google Patents
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Abstract
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Translated fromChinese技术领域technical field
本实用新型属于声波定位设备技术领域，特别涉及一种便携式变电站噪声成像定位检测装置。The utility model belongs to the technical field of acoustic wave positioning equipment, in particular to a portable substation noise imaging positioning detection device.
背景技术Background technique
随着电力企业管理精细化、服务人性化、资料规范化，对电器设备的运行状态的周期性试验和抽试要求越来越高、越来越细，传统的听声辩位已经很难彻底地解决现场技术问题；研究发现，任何电气设备在运行中，由于受到交变电流的作用，都会发生各种声音和振动，这些声音和振动是运行设备所特有的，是表示设备运行状态的一种特征。例如，变电站多是处在一个有多种噪声的环境下，其中大多是工频声信号，当设备出现故障时，必然会伴随产生噪声信号，这些噪声和工频声信号混杂在环境声响中。但是，变电站同时又是一个环境比较特殊的场所，在变电站运行状态下是不允许人靠近设备的，属于危险区域，工作期间禁止人员接近，因此，设备故障无法预知、设备故障后无法定位，对其故障缺陷的检测十分困难。而在定期的检修期间，技术人员又无法重现高压时的故障现象，这个问题一直没有得到解决突破，只能人工凭经验推断，大面积更换设备，但对于异常声音的定位，仅凭耳朵是很难做到的。所以如何在嘈杂环境下进行声源定位就显得尤为重要，并且在其他行业也极具应用价值。目前，变电站的异常噪声源的查找方法智能化程度很低，无法快速准确的查找噪声源、排除故障，以此来减少设备故障对变电站带来的巨大损失。机械科学与技术期刊2008年6月，第二十七卷第六期“超声波远距离振动信号检测系统的设计”记载：在机械设备状态监测与故障诊断中，振动信号是一个重要的状态参量，文章针对压电式、电涡流传感器等常规的振动测量方法和仪器在特殊环境中的局限性，提出了基于超声波的非接触式检测方法，研究并设计了系统检测装置，该检测装置主要由超声波发生模块、超声波接收模块和基于L abV IEW的数据采集赴理3个部分组成，利用该装置对振动对象进行远距离测量。但是上述检测装置需要对振动对象发射超声波信号，利用振动对超声波信号调制之后再进行信号接收，处理确定故障点，结构相对复杂。CN 101865789 A 公开了一种工业检测领域的近场声全息声像模式识别的故障检测装置及其检测方法，包括传声器阵列、扫描架、参考源、固支肋板、激振源和数据采集系统。利用机械正常与故障状态下声压幅值和分布的变化，借鉴图像诊断技术在其他领域的应用，采用图像处理、特征提取和模式识别技术对近场声全息图像进行处理。但是对于信号采集量较大，数据处理麻烦，准确率比较低，同时对于装置的要求较高，不便于推广使用。With the refinement of management, humanization of service, and standardization of data in electric power enterprises, the requirements for periodic testing and random testing of the operating status of electrical equipment are getting higher and higher, and the traditional listening and identification has been difficult to solve completely. On-site technical issues; research has found that any electrical equipment in operation, due to the action of alternating current, will produce various sounds and vibrations, these sounds and vibrations are unique to operating equipment, and are a feature that indicates the operating status of the equipment . For example, substations are mostly in an environment with multiple noises, most of which are power frequency sound signals. When equipment fails, noise signals will inevitably be generated. These noises and power frequency sound signals are mixed in the environmental sound. However, the substation is also a place with a relatively special environment. When the substation is in operation, people are not allowed to approach the equipment. It is a dangerous area, and personnel are prohibited from approaching during work. The detection of its fault defects is very difficult. During the regular maintenance period, the technicians could not reproduce the fault phenomenon at high pressure. This problem has not been solved and a breakthrough has been made. It can only be inferred manually based on experience and large-scale replacement of equipment. However, the location of abnormal sounds can only be determined by the ear. It's hard to do. Therefore, how to locate the sound source in a noisy environment is particularly important, and it is also of great application value in other industries. At present, the search method for abnormal noise sources in substations is very low in intelligence, and it is impossible to quickly and accurately find noise sources and troubleshoot, so as to reduce the huge losses caused by equipment failures to substations. Mechanical Science and Technology Journal, June 2008, Volume 27, Issue 6 "Design of Ultrasonic Remote Vibration Signal Detection System" records: In mechanical equipment condition monitoring and fault diagnosis, vibration signal is an important state parameter, Aiming at the limitations of conventional vibration measurement methods such as piezoelectric and eddy current sensors and instruments in special environments, this paper proposes a non-contact detection method based on ultrasonic waves, researches and designs a system detection device, which is mainly composed of ultrasonic Generating module, ultrasonic receiving module and data acquisition and processing based on LabVIEW are composed of three parts, and the device is used for long-distance measurement of vibration objects. However, the above detection device needs to transmit ultrasonic signals to the vibrating object, use the vibration to modulate the ultrasonic signals, and then receive the signals to process and determine the fault point, and the structure is relatively complicated. CN 101865789 A discloses a fault detection device and detection method for near-field acoustic holographic image pattern recognition in the field of industrial detection, including a microphone array, a scanning frame, a reference source, a fixed support rib, an excitation source and a data acquisition system . Utilizing the change of sound pressure amplitude and distribution under normal and faulty state of machinery, drawing on the application of image diagnosis technology in other fields, the near-field acoustic holographic image is processed by image processing, feature extraction and pattern recognition technology. However, the amount of signal collection is large, the data processing is cumbersome, and the accuracy rate is relatively low. At the same time, the requirements for the device are relatively high, which is not convenient for popularization and use.
实用新型内容Utility model content
本实用新型的目的在于解决上述问题，提供一种方便观察、操作安全的便携式变电站噪声成像定位检测装置。The purpose of the utility model is to solve the above problems and provide a portable substation noise imaging positioning detection device which is convenient for observation and safe in operation.
为实现上述目的，本实用新型所采用的技术方案是：一种便携式变电站噪声成像定位检测装置，包括通过同轴电缆相连的成像显示机构和噪声探测机构，所述噪声探测机构包括矩阵设置于二次曲面结构上的噪声传感器和信号预处理电路。In order to achieve the above purpose, the technical solution adopted by the utility model is: a portable substation noise imaging positioning detection device, including an imaging display mechanism and a noise detection mechanism connected by a coaxial cable, and the noise detection mechanism includes a matrix arranged in two Noise sensors and signal preprocessing circuits on subsurface structures.
所述成像显示机构包括显示器、处理器和与所述处理器连接的数据存储器；所述处理器输入端连接噪声探测机构的输出端，所述处理器的输出端连接所述显示器。The imaging display mechanism includes a display, a processor and a data memory connected to the processor; the input end of the processor is connected to the output end of the noise detection mechanism, and the output end of the processor is connected to the display.
所述处理器设置声强映射处理模块，所述声强映射处理模块生成的声强映射图通过阈值电路在所述显示器以不同颜色的像素点显示出来，所述相同颜色像素点组成的色环带代表相同声强阈值。The processor is provided with a sound intensity mapping processing module, and the sound intensity map generated by the sound intensity mapping processing module is displayed on the display with pixels of different colors through a threshold circuit, and the color circle formed by the same color pixels is The bands represent the same sound intensity threshold.
所述二次曲面结构上的噪声传感器数量设置为16个或32个或者64个。The number of noise sensors on the quadric surface structure is set to 16 or 32 or 64.
所述信号预处理电路包括自适应放大电路、低通滤波电路、分帧电路和加窗电路，所述分帧电路设置帧移为10ms。The signal preprocessing circuit includes an adaptive amplification circuit, a low-pass filter circuit, a framing circuit and a windowing circuit, and the framing circuit sets a frame shift of 10 ms.
所述噪声传感器包括外壳体、芯轴、内罩、内盖、电路板、陶瓷压电片和底座构成，所述电路板装有含有两个固有频率ωn不相同的压电陶磁片的阻抗变换放大电路，所述内罩固定在所述外壳体上，所述底座通过芯轴与所述内罩固定连接，所述压电陶瓷片安装在芯轴上，所述内盖固定在内罩上，所述电路板固定在所述内盖上，所述阻抗变换放大电路外连所述信号预处理电路。The noise sensor consists of an outer shell, a mandrel, an inner cover, an inner cover, a circuit board, a ceramic piezoelectric sheet and a base, and the circuit board is equipped with an impedance transformation device containing two piezoelectric ceramic sheets with different natural frequencies ωn. Amplifying circuit, the inner cover is fixed on the outer casing, the base is fixedly connected to the inner cover through a mandrel, the piezoelectric ceramic sheet is installed on the mandrel, and the inner cover is fixed on the inner cover , the circuit board is fixed on the inner cover, and the impedance transformation amplifying circuit is externally connected to the signal preprocessing circuit.
所述二次曲面结构弧面前端周向设置前伸的喇叭形导音板。A trumpet-shaped sound guide plate protruding forward is arranged around the front end of the arc surface of the quadratic surface structure.
所述二次曲面结构下方设置支撑架，所述支撑架下部设置万向轮，所述支撑架上设置升降构件。A supporting frame is arranged under the quadratic surface structure, universal wheels are arranged on the lower part of the supporting frame, and a lifting member is arranged on the supporting frame.
所述处理器连接报警装置，所述报警装置包括声音和闪光报警器。The processor is connected to an alarm device, and the alarm device includes sound and flash alarms.
本实用新型包括通过同轴电缆相连的成像显示机构和噪声探测机构，所述噪声探测机构包括矩阵设置于二次曲面结构上的噪声传感器和信号预处理电路；所述成像显示机构包括显示器、处理器和与所述处理器连接的数据存储器；所述处理器输入端连接噪声探测机构的输出端，所述处理器的输出端连接所述显示器；通过所述二次曲面结构上的噪声传感器采集所述振动噪声源信号的球面波信号，利用其立体结构进行定位，结合信号预处理电路，确定噪声源信息并进行后期处理和显示，方便故障诊断和预警分析，提高变电站系统安全运行；The utility model comprises an imaging display mechanism and a noise detection mechanism connected by a coaxial cable, the noise detection mechanism includes a noise sensor and a signal preprocessing circuit arranged in a matrix on a quadric surface structure; the imaging display mechanism includes a display, a processing device and a data memory connected to the processor; the input end of the processor is connected to the output end of the noise detection mechanism, and the output end of the processor is connected to the display; collected by the noise sensor on the quadric surface structure The spherical wave signal of the vibration noise source signal is positioned by its three-dimensional structure, combined with the signal preprocessing circuit, to determine the noise source information and perform post-processing and display, which is convenient for fault diagnosis and early warning analysis, and improves the safe operation of the substation system;
所述处理器设置声强映射处理模块，所述声强映射图通过阈值电路在所述显示器以不同颜色的像素点显示出来，所述相同颜色像素点组成的色环带代表相同声强阈值，显示结果清晰明了，方便使用者进行观察和分析，对于快速故障诊断具有显著的意义。The processor is provided with a sound intensity mapping processing module, and the sound intensity map is displayed on the display with pixels of different colors through the threshold circuit, and the color ring formed by the pixels of the same color represents the same sound intensity threshold, The display results are clear and clear, which is convenient for users to observe and analyze, and has significant significance for rapid fault diagnosis.
所述二次曲面结构上的噪声传感器数量设置为16个或32个或者64个，不仅便于对采集的数据进行二进制处理分析，而且布置规范；所述信号预处理电路包括自适应放大电路、低通滤波电路、分帧电路和加窗电路，通过对信号进行放大，然后低通滤波滤除高频和多倍频信号，减少高频以及倍频信号的干扰，减轻数据分析难度，并以分帧电路和加窗电路对采集数据进行量化分析和显示，便于形成声强映射图的基础数据信息。The number of noise sensors on the quadric surface structure is set to 16 or 32 or 64, which is not only convenient for binary processing and analysis of the collected data, but also has a standardized layout; the signal preprocessing circuit includes an adaptive amplifier circuit, a low Pass filtering circuit, framing circuit and windowing circuit, by amplifying the signal, and then low-pass filtering to filter out high-frequency and multi-frequency signals, reduce the interference of high-frequency and multi-frequency signals, reduce the difficulty of data analysis, and divide The frame circuit and the window circuit perform quantitative analysis and display on the collected data, which facilitates the formation of the basic data information of the sound intensity map.
所述噪声传感器包括外壳体、芯轴、内罩、内盖、电路板、陶瓷压电片和底座构成，所述电路板装有含有两个固有频率ωn不相同的压电陶磁片的阻抗变换放大电路，所述内罩固定在所述外壳体上，所述底座通过芯轴与所述内罩固定连接，所述压电陶瓷片安装在芯轴上，所述内盖固定在内罩上，所述电路板固定在所述内盖上，所述阻抗变换放大电路外连所述信号预处理电路，比压电陶瓷片类的拾音探头的频率响应范围更宽，较之单压电片探头的输出频率范围可增大到2倍左右，其收到能量大、机械振幅强，于是压电陶瓷片产生更强的电信号，提高了对信号采集的高灵敏度；同时其对空气中声音的干扰可提高15～25分贝。The noise sensor consists of an outer shell, a mandrel, an inner cover, an inner cover, a circuit board, a ceramic piezoelectric sheet and a base, and the circuit board is equipped with an impedance transformation device containing two piezoelectric ceramic sheets with different natural frequencies ωn. Amplifying circuit, the inner cover is fixed on the outer casing, the base is fixedly connected to the inner cover through a mandrel, the piezoelectric ceramic sheet is installed on the mandrel, and the inner cover is fixed on the inner cover , the circuit board is fixed on the inner cover, and the impedance transformation amplifying circuit is externally connected to the signal preprocessing circuit, which has a wider frequency response range than the pickup probe of the piezoelectric ceramic sheet, and a wider frequency response range than the single piezoelectric The output frequency range of the chip probe can be increased to about 2 times, and the received energy is large and the mechanical amplitude is strong, so the piezoelectric ceramic chip generates a stronger electrical signal, which improves the high sensitivity of signal acquisition; Sound interference can be increased by 15 to 25 decibels.
所述二次曲面结构弧面前端周向设置前伸的喇叭形导音板，不仅可以提高收集到信号的准确度，也可以减少非检测范围内其他噪声信号的叠加干扰，影响判断的准确性和可靠性；The horn-shaped sound guide plate protruding forward in the front end of the arc surface of the quadratic surface structure can not only improve the accuracy of the collected signals, but also reduce the superimposed interference of other noise signals in the non-detection range, which affects the accuracy of judgment and reliability;
所述二次曲面结构下方设置支撑架，所述支撑架下部设置万向轮，可以方便使用时候调整与被检测对象的距离，并且运输、携带方便；所述支撑架上设置升降构件，可以根据被检测部位的高度进行初步调整，提高检测准确性；所述处理器连接报警装置，所述报警装置包括声音和闪光报警器，在处理器对信号进行处理后结合数据存储器内的数据信息进行对比分析，初步预警故障信息，给后续按照声强映射图的信息进行精确定位提供良好的基础条件。A support frame is set under the quadratic surface structure, and the lower part of the support frame is provided with universal wheels, which can facilitate the adjustment of the distance from the detected object during use, and are convenient for transportation and portability; The height of the detected part is preliminarily adjusted to improve detection accuracy; the processor is connected to an alarm device, and the alarm device includes sound and flash alarms, and after the processor processes the signal, it is compared with the data information in the data memory Analysis and preliminary early warning of fault information provide good basic conditions for subsequent accurate positioning according to the information of the sound intensity map.
本实用新型创新性的把噪声信号获取和处理分开，系统前端噪声信号采集部件具有便携、定位准确、预处理迅速等特点，处理、显示部件具有功能丰富、显示明细、预警及时的功能优点。本实用新型便携式变电站噪声成像定位检测装置从根本上解决了变电站设备故障无法准确预警，故障位置不能准确判断等难题，能够为及时掌握变电站设备运行情况提供技术保障，为设备故障点的准确判断提供理论依据。该侦测系统还具有以下特点：The utility model innovatively separates noise signal acquisition and processing. The front-end noise signal acquisition part of the system has the characteristics of portability, accurate positioning, and rapid preprocessing. The processing and display parts have the functional advantages of rich functions, detailed display, and timely warning. The portable substation noise imaging positioning detection device of the utility model fundamentally solves the problems that substation equipment faults cannot be accurately warned and the fault location cannot be accurately judged. Theoretical basis. The detection system also has the following features:
1）采集和处理分开，保证了噪声源定位的准确性；1) Acquisition and processing are separated to ensure the accuracy of noise source location;
2）到达时间采集模块采用全硬件电路实现，确保了数据信息传输处理可靠性和定位的精度；2) The arrival time acquisition module is implemented with a full hardware circuit, which ensures the reliability of data information transmission and processing and the accuracy of positioning;
3）自带时钟并定时与中心端进行时钟校准，保证时钟的准确性；3) Self-contained clock and clock calibration with the central terminal regularly to ensure the accuracy of the clock;
4）可以存储信息，便于后期分析和打印记录的动作状态信息如：噪声源位置坐标、噪声源出现时间、噪声源所处机柜信息等；4) It can store information, which is convenient for later analysis and printing of recorded action status information, such as: noise source position coordinates, noise source occurrence time, noise source cabinet information, etc.;
5）整套设备装置制作小巧、精致，现场安装接线更简单、方便。5) The whole set of equipment is small and exquisite, and the on-site installation and wiring are simpler and more convenient.
本实用新型根据变电站待测设备位置，建立二次曲面的立方体数据模型，基于该模型建立三维坐标系，在该模型各定点位置设设置至少16个噪声传感器，并对相关噪声信号进行预处理和显示处理，利用伪图像信息进行成像，获得模拟全景噪声信号并实现噪声成像，并且利用色环带使分析简便，可以实现快速故障定位。验证得出检测的变电站静态目标与噪声相应目标相互吻合，噪声成像信息可靠度高。本实用新型通过利于超声波探测定位，并所述成像显示机构和噪声探测机构设置为一体的结构，有效地解决了人耳无法知觉和定位的变电站异常振动，确保设备运行在正常的状态下，在设备出现运行故障前，找到问题并解决掉，防患于未然，有效提高了变电站检修维护的工作效率，本实用新型简便实用效率高，具有很好的推广应用价值。According to the position of the equipment to be tested in the substation, the utility model establishes a cubic data model of a quadratic surface, establishes a three-dimensional coordinate system based on the model, sets at least 16 noise sensors at each fixed point of the model, and performs preprocessing and processing on the relevant noise signals. Display processing, use pseudo-image information for imaging, obtain simulated panoramic noise signal and realize noise imaging, and use color ring band to make analysis simple and fast fault location can be realized. It is verified that the detected static target of the substation is consistent with the corresponding target of noise, and the reliability of noise imaging information is high. The utility model is beneficial to the ultrasonic detection and positioning, and the imaging display mechanism and the noise detection mechanism are integrated into a structure, which effectively solves the abnormal vibration of the substation that cannot be perceived and positioned by the human ear, and ensures that the equipment operates in a normal state. Before the operation failure of the equipment occurs, the problem can be found and solved, so as to prevent problems before they happen, and effectively improve the work efficiency of substation repair and maintenance. The utility model is simple, practical and efficient, and has good popularization and application value.
附图说明Description of drawings
下面结合附图对本实用新型做进一步的说明：Below in conjunction with accompanying drawing, the utility model is further described:
图1是本实用新型中便携式变电站噪声成像定位检测装置的结构示意图；Fig. 1 is a structural schematic diagram of a portable substation noise imaging positioning detection device in the utility model;
图2是本实用新型中便携式变电站噪声成像定位检测装置的信号处理框图。Fig. 2 is a signal processing block diagram of the portable substation noise imaging positioning detection device in the utility model.
具体实施方式Detailed ways
具体实施例一Specific embodiment one
如图1和图2所示，一种便携式变电站噪声成像定位检测装置，包括通过同轴电缆相连的成像显示机构和噪声探测机构，所述噪声探测机构包括矩阵设置于二次曲面结构1上的噪声传感器12和信号预处理电路，所述噪声传感器2数量设置为32个。As shown in Figures 1 and 2, a portable substation noise imaging positioning detection device includes an imaging display mechanism and a noise detection mechanism connected by a coaxial cable, and the noise detection mechanism includes a matrix arranged on a quadric surface structure 1 The
所述成像显示机构包括显示器2、处理器3和与所述处理器3连接的数据存储器4；所述处理器3输入端连接噪声探测机构的输出端，所述处理器3的输出端连接所述显示器2。The imaging display mechanism includes a
所述处理器3设置声强映射处理模块5，所述声强映射处理模块5生成的声强映射图通过阈值电路在所述显示器2以不同颜色的像素点显示出来，所述相同颜色像素点组成的色环带6代表相同声强阈值。The processor 3 is provided with a sound intensity
所述信号预处理电路包括自适应放大电路、低通滤波电路、分帧电路和加窗电路，所述分帧电路设置帧移为10ms。The signal preprocessing circuit includes an adaptive amplification circuit, a low-pass filter circuit, a framing circuit and a windowing circuit, and the framing circuit sets a frame shift of 10 ms.
所述噪声传感器12包括外壳体、芯轴、内罩、内盖、电路板、陶瓷压电片和底座构成，所述电路板装有含有两个固有频率ωn不相同的压电陶磁片的阻抗变换放大电路，所述内罩固定在所述外壳体上，所述底座通过芯轴与所述内罩固定连接，所述压电陶瓷片安装在芯轴上，所述内盖固定在内罩上，所述电路板固定在所述内盖上，所述阻抗变换放大电路外连所述信号预处理电路。The
所述二次曲面结构1的弧面前端周向设置前伸的喇叭形导音板7。A trumpet-shaped
所述二次曲面结构1下方设置支撑架8，所述支撑架8下部设置万向轮9，所述支撑架8上设置升降构件10。A
所述处理器3连接报警装置11，所述报警装置11包括声音和闪光报警器。The processor 3 is connected to an
具体实施例二Specific embodiment two
与具体实施例一区别仅在于：所述二次曲面结构1上的噪声传感器2数量设置为16个或64个。The only difference from the first embodiment is that the number of
上述实施例中，本实用新型包括通过同轴电缆相连的成像显示机构和噪声探测机构，所述噪声探测机构包括矩阵设置于二次曲面结构1上的噪声传感器12和信号预处理电路；所述成像显示机构包括显示器2、处理器3和与所述处理器3连接的数据存储器4；所述处理器3输入端连接噪声探测机构的输出端，所述处理器3的输出端连接所述显示器2；通过所述二次曲面结构1上的噪声传感器12采集所述振动噪声源信号的球面波信号，利用其立体结构进行定位，结合信号预处理电路，确定噪声源信息并进行后期处理和显示，方便故障诊断和预警分析，提高变电站系统安全运行。In the above embodiment, the utility model includes an imaging display mechanism and a noise detection mechanism connected by a coaxial cable, and the noise detection mechanism includes a matrix of
所述处理器3设置声强映射处理模块5，所述声强映射图通过阈值电路在所述显示器2以不同颜色的像素点显示出来，所述相同颜色像素点组成的色环带6代表相同声强阈值，显示结果清晰明了，方便使用者进行观察和分析，对于快速故障诊断具有显著的意义。The processor 3 is provided with a sound intensity
所述二次曲面结构1上的噪声传感器12数量设置为16个或32个或者64个，不仅便于对采集的数据进行二进制处理分析，而且布置规范。The number of
所述信号预处理电路包括自适应放大电路、低通滤波电路、分帧电路和加窗电路，通过对信号进行放大，然后低通滤波滤除高频和多倍频信号，减少高频以及倍频信号的干扰，减轻数据分析难度，并以分帧电路和加窗电路对采集是数据进行量化分析和显示，便于形成声强映射图的基础数据信息。The signal preprocessing circuit includes an adaptive amplification circuit, a low-pass filter circuit, a framing circuit and a windowing circuit. By amplifying the signal and then filtering out high-frequency and multiplier signals by low-pass filtering, the high-frequency and multiplier signals are reduced. The interference of the frequency signal reduces the difficulty of data analysis, and the collected data is quantitatively analyzed and displayed by the framing circuit and the windowing circuit, which is convenient for forming the basic data information of the sound intensity map.
所述噪声传感器12包括外壳体、芯轴、内罩、内盖、电路板、陶瓷压电片和底座构成，所述电路板装有含有两个固有频率ωn不相同的压电陶磁片的阻抗变换放大电路，所述内罩固定在所述外壳体上，所述底座通过芯轴与所述内罩固定连接，所述压电陶瓷片安装在芯轴上，所述内盖固定在内罩上，所述电路板固定在所述内盖上，所述阻抗变换放大电路外连所述信号预处理电路，比压电陶瓷片类的拾音探头的频率响应范围更宽，较之单压电片探头的输出频率范围可增大到2倍左右，其收到能量大、机械振幅强，于是压电陶瓷片产生更强的电信号，提高了对信号采集的高灵敏度；同时其对空气中声音的干扰可提高15～25分贝。The
所述二次曲面结构1弧面前端周向设置前伸的喇叭形导音板7，不仅可以提高收集到信号的准确度，也可以减少非检测范围内其他噪声信号的叠加干扰，影响判断的准确性和可靠性；The front end of the arc surface of the quadratic surface structure 1 is provided with a protruding horn-shaped
所述二次曲面结构1下方设置支撑架8，所述支撑架8下部设置万向轮9，可以方便使用时候调整与被检测对象的距离，并且运输、携带方便；所述支撑架8上设置升降构件10，可以根据被检测部位的高度进行初步调整，提高检测准确性。A
所述处理器3连接报警装置11，所述报警装置11包括声音和闪光报警器，在处理器3对信号进行处理后结合数据存储器4内的数据信息进行对比分析，初步预警故障信息，给后续按照声强映射图的信息进行精确定位提供良好的基础条件。Described processor 3 is connected
本实用新型创新性的把噪声信号获取和处理分开，系统前端噪声信号采集部件具有便携、定位准确、预处理迅速等特点，处理、显示部件具有功能丰富、显示明细、预警及时的功能优点。本实用新型便携式变电站噪声成像定位检测装置从根本上解决了变电站设备故障无法准确预警，故障位置不能准确判断等难题，能够为及时掌握变电站设备运行情况提供技术保障，为设备故障点的准确判断提供理论依据。该侦测系统还具有以下特点：The utility model innovatively separates noise signal acquisition and processing. The front-end noise signal acquisition part of the system has the characteristics of portability, accurate positioning, and rapid preprocessing. The processing and display parts have the functional advantages of rich functions, detailed display, and timely warning. The portable substation noise imaging positioning detection device of the utility model fundamentally solves the problems that substation equipment faults cannot be accurately warned and the fault location cannot be accurately judged. Theoretical basis. The detection system also has the following features:
1）采集和处理分开，保证了噪声源定位的准确性；1) Acquisition and processing are separated to ensure the accuracy of noise source location;
2）到达时间采集模块采用全硬件电路实现，确保了数据信息传输处理可靠性和定位的精度；2) The arrival time acquisition module is implemented with a full hardware circuit, which ensures the reliability of data information transmission and processing and the accuracy of positioning;
3）自带时钟并定时与中心端进行时钟校准，保证时钟的准确性；3) Self-contained clock and clock calibration with the central terminal regularly to ensure the accuracy of the clock;
4）可以存储信息，便于后期分析和打印记录的动作状态信息如：噪声源位置坐标、噪声源出现时间、噪声源所处机柜信息等；4) It can store information, which is convenient for later analysis and printing of recorded action status information, such as: noise source position coordinates, noise source occurrence time, noise source cabinet information, etc.;
5）整套设备装置制作小巧、精致，现场安装接线更简单、方便。5) The whole set of equipment is small and exquisite, and the on-site installation and wiring are simpler and more convenient.
本实用新型根据变电站待测设备位置，建立二次曲面的立方体数据模型，基于该模型建立三维坐标系，在该模型各定点位置设设置至少16个噪声传感器12，并对相关噪声信号进行预处理和显示处理，利用伪图像信息进行成像，获得模拟全景噪声信号并实现噪声成像，并且利用色环带6使分析简便，可以实现快速故障定位。验证得出检测的变电站静态目标与噪声相应目标相互吻合，噪声成像信息可靠度高。本实用新型通过利于超声波探测定位，并所述成像显示机构和噪声探测机构设置为一体的结构，有效地解决了人耳无法知觉和定位的变电站异常振动，确保设备运行在正常的状态下，在设备出现运行故障前，找到问题并解决掉，防患于未然，有效提高了变电站检修维护的工作效率，本实用新型简便实用效率高，具有很好的推广应用价值。According to the position of the equipment to be tested in the substation, the utility model establishes a cubic data model of a quadratic surface, establishes a three-dimensional coordinate system based on the model, sets at least 16
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| CN103336266A (en)* | 2013-06-28 | 2013-10-02 | 河南省电力公司南阳供电公司 | Portable transformer substation noise imaging positioning detection device |
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| CN108645509A (en)* | 2018-06-27 | 2018-10-12 | 西安输变电工程环境影响控制技术中心有限公司 | A kind of self-propelled low frequency substation noise cloud atlas test device and test method |
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| CN109060113A (en)* | 2018-06-27 | 2018-12-21 | 西安输变电工程环境影响控制技术中心有限公司 | Angle measurement adjustable volume configuration substation's noise cloud atlas test device and test method |
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