技术领域technical field
本发明属于组合电器技术领域，尤其是一种组合电器超声波检测抗干扰屏蔽方法。The invention belongs to the technical field of combined electrical appliances, in particular to an anti-interference shielding method for ultrasonic detection of combined electrical appliances.
背景技术Background technique
目前对组合电器设备进行超声波局放检测已成为判断组合电气内部是否存在缺陷的主要检测手段之一，但是，在对组合电器进行超声波带电检测时，很容易受到变电站内电晕、变压器风扇等噪声干扰，使得检测判断困难，容易造成误判、漏判，影响检测效果。At present, the ultrasonic partial discharge detection of combined electrical equipment has become one of the main detection methods to judge whether there are defects in the combined electrical equipment. However, when the ultrasonic live detection is performed on the combined electrical equipment, it is easy to be affected by noise such as corona in the substation and transformer fans. Interference makes detection and judgment difficult, and it is easy to cause misjudgment and missed judgment, which affects the detection effect.
发明内容Contents of the invention
本发明的目地在于克服现有技术的不足，提出一种设计合理、抗干扰能力强且准确性高的组合电器超声波检测抗干扰屏蔽方法。The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an anti-interference shielding method for ultrasonic detection of combined electrical appliances with reasonable design, strong anti-interference ability and high accuracy.
本发明解决其技术问题是采取以下技术方案实现的：The present invention solves its technical problem and realizes by taking the following technical solutions:
一种组合电器超声波检测抗干扰屏蔽方法，包括以下步骤：An anti-interference shielding method for ultrasonic detection of combined electrical appliances, comprising the following steps:
步骤1、将超声波传感器固定在组合电器本体上并通过信号线与超声波检测仪器连接在一起，对组合电器进行超声波局放检测；Step 1. Fix the ultrasonic sensor on the body of the combined electrical appliance and connect it with the ultrasonic testing instrument through the signal line, and perform ultrasonic partial discharge detection on the combined electrical appliance;
步骤2、通过超声波检测仪器发现检测数据异常时，保持超声传感器在组合电器设备本体上不动，在超声探头外部加装专用噪声屏蔽罩；Step 2. When the detection data is found to be abnormal through the ultrasonic detection instrument, keep the ultrasonic sensor on the body of the combined electrical equipment and install a special noise shield outside the ultrasonic probe;
步骤3、通过超声波检测仪器再次对组合电器进行超声波局放检测，如果前后两次检测到的超声波数据无明显区别，则可认为超声波传感器接收到的信号来源于组合电器设备本体；如果加装专用噪声屏蔽罩后，超声波数值明显变小，则可认为此前超声波传感器检测到的信号来源于空间外部，是噪声干扰。Step 3. Perform ultrasonic partial discharge detection on the combination electrical appliance again through the ultrasonic testing instrument. If there is no obvious difference between the ultrasonic data detected twice before and after, it can be considered that the signal received by the ultrasonic sensor comes from the combination electrical equipment body; After the noise shielding cover, the ultrasonic value becomes significantly smaller, it can be considered that the signal detected by the ultrasonic sensor comes from the outside of the space, which is noise interference.
所述专用噪声屏蔽罩为弧形噪声屏蔽罩The special noise shield is a curved noise shield
所述专用噪声屏蔽罩的直径100厘米，其曲率半径为40厘米，其厚度为5厘米，其使用的材质为隔音板。The diameter of the special noise shielding cover is 100 centimeters, its radius of curvature is 40 centimeters, its thickness is 5 centimeters, and the material it uses is a sound insulation board.
本发明的优点和积极效果是：Advantage and positive effect of the present invention are:
本发明使用专用噪声噪屏蔽罩罩在超声波传感器外面，能够有效地避免外部噪声的干扰，进而判别放电发生在组合电器高压电位还是地电位，有助于对设备内部缺陷的准确定位、定性，有效地提高了带电检测局放定位的准确性，为设备检修提供可行性指导意见。The invention uses a special noise shielding cover to cover the ultrasonic sensor, which can effectively avoid the interference of external noise, and then judge whether the discharge occurs at the high voltage potential of the combined electrical appliance or the ground potential, which is helpful for accurate positioning and characterization of the internal defects of the equipment, and is effective It greatly improves the accuracy of live detection partial discharge positioning, and provides feasible guidance for equipment maintenance.
附图说明Description of drawings
图1是本发明的检测原理示意图；Fig. 1 is the detection principle schematic diagram of the present invention;
图2是专用噪声屏蔽罩的结构示意图。Fig. 2 is a schematic diagram of the structure of the special noise shielding case.
具体实施方式detailed description
以下结合附图对本发明实施例做进一步详述。Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
一种组合电器超声波检测抗干扰屏蔽方法，包括以下步骤：An anti-interference shielding method for ultrasonic detection of combined electrical appliances, comprising the following steps:
步骤1、将超声波传感器2固定在组合电器本体5上并通过信号线3与超声波检测仪器4连接在一起，对组合电器进行超声波局放检测，如图1所示。Step 1. Fix the ultrasonic sensor 2 on the combined electrical appliance body 5 and connect it with the ultrasonic detection instrument 4 through the signal line 3 to perform ultrasonic partial discharge detection on the combined electrical appliance, as shown in FIG. 1 .
步骤2、通过超声波检测仪器发现检测数据异常时，保持超声传感器在组合电器设备本体上不动，在超声探头外部加装专用噪声屏蔽罩1。Step 2. When the detected data is found to be abnormal by the ultrasonic detection instrument, keep the ultrasonic sensor on the body of the combined electrical device and install a special noise shielding cover 1 outside the ultrasonic probe.
在本步骤中，专用噪声屏蔽罩是为本发明专门设计的弧形噪声屏蔽罩，如图2所示，该屏蔽罩大小尺寸为：直径100厘米，曲率半径：40厘米，厚度：5厘米，材质为隔音板。In this step, the special noise shielding cover is a curved noise shielding cover specially designed for the present invention, as shown in Figure 2, the size of the shielding cover is: 100 cm in diameter, radius of curvature: 40 cm, thickness: 5 cm, The material is soundproof board.
步骤3、通过超声波检测仪器再次对组合电器进行超声波局放检测，如果前后两次检测到的超声波数据无明显区别，则可认为超声波传感器接收到的信号来源于组合电器设备本体，如果加装专用噪声屏蔽罩后，超声波数值明显变小，则可认为此前超声波传感器检测到的信号来源于空间外部，是噪声干扰。Step 3. Perform ultrasonic partial discharge detection on the combination electrical appliance again through the ultrasonic testing instrument. If there is no obvious difference between the ultrasonic data detected twice before and after, it can be considered that the signal received by the ultrasonic sensor comes from the combined electrical equipment body. After the noise shielding cover, the ultrasonic value becomes significantly smaller, so it can be considered that the signal detected by the ultrasonic sensor comes from the outside of the space, which is noise interference.
通过以上步骤，可以准确地对组合电器进行带电检测时，能够有效地避免变电站内电晕、变压器风扇等噪声干扰，防止误判发生，保证了检测效果。Through the above steps, it is possible to accurately detect the liveness of the combination electrical appliance, effectively avoid noise interference such as corona in the substation, transformer fan, etc., prevent misjudgment, and ensure the detection effect.
需要强调的是，本发明所述的实施例是说明性的，而不是限定性的，因此本发明并不限于具体实施方式中所述的实施例，凡是由本领域技术人员根据本发明的技术方案得出的其他实施方式，同样属于本发明保护的范围。It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, so the present invention is not limited to the embodiments described in the specific implementation, and those skilled in the art according to the technical solutions of the present invention Other obtained implementation modes also belong to the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710555018.1ACN107345995A (en) | 2017-07-10 | 2017-07-10 | A kind of anti-interference screen method of combined electrical apparatus ultrasound examination |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710555018.1ACN107345995A (en) | 2017-07-10 | 2017-07-10 | A kind of anti-interference screen method of combined electrical apparatus ultrasound examination |
| Publication Number | Publication Date |
|---|---|
| CN107345995Atrue CN107345995A (en) | 2017-11-14 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710555018.1APendingCN107345995A (en) | 2017-07-10 | 2017-07-10 | A kind of anti-interference screen method of combined electrical apparatus ultrasound examination |
| Country | Link |
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| CN (1) | CN107345995A (en) |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20171114 | |
| RJ01 | Rejection of invention patent application after publication |