CN111239557A - Partial discharge localization method based on online calibration - Google Patents
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Abstract
本申请提供的基于在线校准的局部放电定位方法中，基于带电指示耦合传感器，在检测阻抗两端注入的脉冲电压信号，与传感器的C1、C2串联构成校准脉冲发生器，并将产生的放电量注入到线路中，在线得到各终端的响应放电量特性；在线路发生局部放电时，保持测量系统的灵敏度不变，得到带电指示耦合传感器的输出放电量响应，通过与在线校准时响应放电量比值的对比确定局部放电发生的位置。本发明方法适用于具有分布参数特性的长线路及配电设备，可实现配电线路和设备局部放电位置的准确检测及快速定位。
In the partial discharge localization method based on on-line calibration provided by this application, the pulse voltage signal injected at both ends of the detection impedance based on the charged indicator coupled sensor is connected in series with C1 and C2 of the sensor to form a calibration pulse generator, and the generated discharge amount It is injected into the line, and the response discharge characteristics of each terminal are obtained online; when partial discharge occurs in the line, the sensitivity of the measurement system is kept unchanged, and the output discharge response of the charged indicating coupling sensor is obtained. The comparison determines where the partial discharge occurs. The method of the invention is suitable for long lines and power distribution equipment with distributed parameter characteristics, and can realize accurate detection and rapid positioning of partial discharge positions of power distribution lines and equipment.
Description
技术领域technical field
本申请涉及电气设备和线路状态监测技术领域，尤其涉及一种基于在线校准的局部放电定位方法。The present application relates to the technical field of electrical equipment and line condition monitoring, and in particular, to a partial discharge localization method based on online calibration.
背景技术Background technique
局部放电是高压电力设备一个重要的绝缘技术指标，在高压电力设备的性能检测中被广泛应用。近年来，国内外众多研究者及机构通过试验研究、理论分析、物理建模等方法研究了局部放电的产生机理及基本的放电特性，研究结果表明局部放电与外加电压的类型、绝缘介质本身的材料特性、缺陷处的电场分布及放电所产生的空间电荷有着密切的关系。Partial discharge is an important insulation technical index of high-voltage power equipment, and it is widely used in the performance testing of high-voltage power equipment. In recent years, many researchers and institutions at home and abroad have studied the generation mechanism and basic discharge characteristics of partial discharge through experimental research, theoretical analysis, physical modeling and other methods. The material properties, the electric field distribution at the defect and the space charge generated by the discharge are closely related.
基于超声波、特高频、暂态地电压局部放电检测技术目前已被普遍应用，如：第一种方法：利用定向天线接收局放设备在局部放电时发出的电磁波，再用信号测量装置显示电磁波的时域信号，用固定杆的中点为固定支点水平旋转固定杆，通过改变得到时间差为零的两个测量点位置，其两位置垂线的交点为局部放电位置；第二种方法：使用超声波检测法对开关柜进行局部放电检测，在开关柜内装设柔性超声传感器以进行局部放电定位；第三种方法：利用获取局部放电源产生的放电信号，根据放电信号建立RSSI指纹图，再根据RSSI指纹图和广义回归神经网络模型得到被测区域中局部放电源的坐标，利用特高频信号结合RSSI指纹技术与广义回归神经网络模型实现局部放电源定位。The partial discharge detection technology based on ultrasonic, UHF and transient ground voltage has been widely used, such as: the first method: use the directional antenna to receive the electromagnetic wave emitted by the partial discharge equipment during partial discharge, and then use the signal measuring device to display the electromagnetic wave The time domain signal of the fixed rod is used as the fixed fulcrum and the fixed rod is rotated horizontally, and the position of two measurement points with a time difference of zero is obtained by changing the position of the two measurement points. The intersection of the vertical lines of the two positions is the partial discharge position; the second method: use The ultrasonic detection method performs partial discharge detection on the switch cabinet, and a flexible ultrasonic sensor is installed in the switch cabinet to locate the partial discharge; the third method: use the discharge signal generated by the partial discharge source, establish the RSSI fingerprint according to the discharge signal, and then RSSI fingerprint map and generalized regression neural network model get the coordinates of PD in the measured area, and use UHF signal combined with RSSI fingerprint technology and generalized regression neural network model to realize the localization of PD.
但是在上述公开的方法中均未提前对系统或线路进行在线校准工作，导致各类传感器所测的电信号存在一定的误差，所得信号结果存在较高的偶然因素。However, in the methods disclosed above, online calibration of the system or line is not performed in advance, which leads to certain errors in the electrical signals measured by various sensors, and there are high accidental factors in the obtained signal results.
发明内容SUMMARY OF THE INVENTION
本申请提供了一种基于在线校准的局部放电定位方法，以解决由于未提前校准系统而不能准确检测局部放电位置的技术问题。The present application provides a partial discharge localization method based on online calibration to solve the technical problem that the partial discharge position cannot be accurately detected because the system is not calibrated in advance.
为了解决上述技术问题，本申请实施例公开了如下技术方案：In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:
本申请提供了一种基于在线校准的局部放电定位方法，包括：The present application provides a partial discharge localization method based on online calibration, including:
利用校准脉冲发生器分别对带电指示耦合传感器校准；Use the calibration pulse generator to calibrate the charged indicating coupling sensor respectively;
当对带电指示耦合传感器进行校准时，分别获取带电指示耦合传感器的测试点响应放电量；When calibrating the live indicating coupling sensor, obtain the response discharge amount of the test point of the live indicating coupling sensor respectively;
根据所述测试点响应放电量分别获取响应放电量比值；According to the response discharge amount of the test point, respectively obtain the response discharge amount ratio;
当发生局部放电时，在所述带电指示耦合传感器的测试点分别获取局放放电量；When partial discharge occurs, obtain the partial discharge discharge amount at the test point of the electrification indicating coupling sensor respectively;
根据所述局放放电量获取局放放电量比值；Obtaining the partial discharge discharge capacity ratio according to the partial discharge discharge capacity;
判断所述局放放电量比值与所述带电指示耦合传感器的响应放电量比值的大小，局部放电发生在与所述局放放电量比值接近的带电指示耦合传感器的附近位置。Determine the magnitude of the ratio of the partial discharge discharge volume to the response discharge volume ratio of the electrification indicating coupling sensor, and the partial discharge occurs in the vicinity of the electrification indicating coupling sensor that is close to the partial discharge discharge volume ratio.
可选的，所述利用校准脉冲发生器分别对带电指示耦合传感器校准，包括：Optionally, the use of the calibration pulse generator to respectively calibrate the live indication coupling sensor, including:
将所述校准脉冲发生器依次从第一带电指示耦合传感器至第n带电指示耦合传感器的校准点注入，其中所述校准脉冲发生器包括依次串联的电压幅值为u0的校准方波、带电指示耦合传感器的电容C1及带电指示耦合传感器的电容C2；The calibration pulse generator is sequentially injected from the calibration point of the first electrification indicating coupling sensor to the nth electrification indicating coupling sensor, wherein the calibration pulse generator Capacitance C 1 indicating the coupling sensor and capacitance C 2 indicating the coupling sensor with electricity;
将产生的放电量q0注入到线路中，其中
可选的，所述当对带电指示耦合传感器进行校准时，分别获取带电指示耦合传感器的测试点响应放电量，包括：Optionally, when calibrating the live indication coupling sensor, respectively acquiring the response discharge amount of the test point of the live indication coupling sensor, including:
当对第n带电指示耦合传感器进行校准时，分别获取第一带电指示耦合传感器的响应放电量q1n、第二带电指示耦合传感器q2n、第三带电指示耦合传感器q3n、第四带电指示耦合传感器q4n、第五带电指示耦合传感器q5n及第六带电指示耦合传感器q6n。When calibrating the nth electrification indication coupling sensor, the response discharge amount q 1n of the first electrification indication coupling sensor, the second electrification indication coupling sensor q 2n , the third electrification indication coupling sensor q 3n , and the fourth electrification indication coupling sensor are obtained respectively. The sensor q 4n , the fifth charge indicating coupling sensor q 5n and the sixth charge indicating coupling sensor q 6n .
可选的，所述根据所述测试点响应放电量分别获取响应放电量比值，包括：Optionally, obtaining the ratio of the response discharge amount according to the response discharge amount of the test point, including:
当对第n带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the nth live indication coupling sensor, the response discharge ratio is:
可选的，所述当发生局部放电时，在所述带电指示耦合传感器的测试点分别获取局放放电量，包括：Optionally, when a partial discharge occurs, the partial discharge amount is obtained at the test point of the live indication coupling sensor, including:
在设备发生局部放电时，保持测量系统的灵敏度不变，测得各带电指示耦合传感器的输出响应为qx1、qx2、qx3、qx4、qx5和qx6。When partial discharge occurs in the equipment, keeping the sensitivity of the measurement system unchanged, the measured output responses of the charged indicating coupling sensors are q x1 , q x2 , q x3 , q x4 , q x5 and q x6 .
可选的，所述根据所述局放放电量获取局放放电量比值，包括：Optionally, the obtaining the partial discharge discharge capacity ratio according to the partial discharge discharge capacity includes:
所述局放放电量比值为：The partial discharge capacity ratio is:
可选的，所述判断所述局放放电量比值与所述带电指示耦合传感器的响应放电量比值的大小，局部放电发生在与所述局放放电量比值接近的带电指示耦合传感器的附近位置，包括：Optionally, the judging the magnitude of the ratio of the partial discharge discharge volume to the response discharge volume ratio of the charged indication coupling sensor, and the partial discharge occurs at a position near the charged indication coupling sensor that is close to the partial discharge discharge volume ratio ,include:
将
可选的，所述带电指示耦合传感器的设置个数为6但是不限于6；Optionally, the set number of the electrified indicating coupling sensors is 6 but not limited to 6;
所述带电指示耦合传感器包括高压电容和检测阻抗，所述高压电容和检测阻抗之间设置有局放校准接口和局放测试接口。The electrification indicating coupling sensor includes a high voltage capacitor and a detection impedance, and a partial discharge calibration interface and a partial discharge test interface are arranged between the high voltage capacitor and the detection impedance.
与现有技术相比，本申请的有益效果为：Compared with the prior art, the beneficial effects of the present application are:
由上述方案可见，本申请提供的基于在线校准的局部放电定位方法中，基于多个带电指示耦合传感器，在检测阻抗两端注入的脉冲电压信号，与传感器的C1、C2串联构成校准脉冲发生器，并将产生的放电量注入到线路中，在线得到各终端的响应特性；在线路发生局部放电时，保持测量系统的灵敏度不变，得到带电指示耦合传感器的输出响应，通过与在线校准时响应比值的对比确定局部放电发生的位置。本发明方法适用于具有分布参数特性的长线路及配电设备，可实现配电线路和设备局部放电的准确检测及快速定位。It can be seen from the above scheme that in the partial discharge localization method based on online calibration provided by the present application, based on a plurality of charged indicating coupled sensors, the pulse voltage signal injected at both ends of the detection impedance is connected in series with C1 and C2 of the sensor to form a calibration pulse generator. , and inject the generated discharge into the line, and obtain the response characteristics of each terminal online; when partial discharge occurs in the line, keep the sensitivity of the measurement system unchanged, and obtain the output response of the charged indicating coupling sensor. The comparison of the ratios determines where the partial discharge occurs. The method of the invention is suitable for long lines and power distribution equipment with distributed parameter characteristics, and can realize accurate detection and rapid positioning of partial discharge of power distribution lines and equipment.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本申请。It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.
附图说明Description of drawings
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative work, the Additional drawings can be obtained from these drawings.
图1为本申请提供的基于在线校准的局部放电定位方法的流程示意图；1 is a schematic flowchart of a partial discharge localization method based on online calibration provided by the present application;
图2为本申请提供的基于在线校准的局部放电定位方法的运用示意图。FIG. 2 is a schematic diagram of the application of the partial discharge localization method based on online calibration provided by the present application.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本申请中的技术方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.
参见附图1，图1示出了本发明实施例提供的一种基于在线校准的局部放电定位方法的流程示意图。下面结合附图1对本申请实施例提供的基于在线校准的局部放电定位方法进行说明。Referring to FIG. 1 , FIG. 1 shows a schematic flowchart of a partial discharge localization method based on online calibration provided by an embodiment of the present invention. The online calibration-based partial discharge localization method provided by the embodiment of the present application will be described below with reference to FIG. 1 .
如图1所示，本申请提供的一种基于在线校准的局部放电定位方法，包括：As shown in FIG. 1 , a partial discharge localization method based on online calibration provided by this application includes:
S110：利用校准脉冲发生器分别对带电指示耦合传感器校准。S110: Use the calibration pulse generator to calibrate the charged indicating coupling sensor respectively.
本申请实施例基于带电指示耦合传感器，在检测阻抗两端注入的脉冲电压信号，与传感器的C1、C2串联构成校准脉冲发生器，并将产生的放电量注入到线路中，在线得到各终端的响应特性。The embodiment of the present application is based on the live indication coupling sensor, the pulse voltage signal injected at both ends of the detection impedance is connected in series with C1 and C2 of the sensor to form a calibration pulse generator, and the generated discharge is injected into the line, and the voltage of each terminal is obtained online. Response characteristics.
具体地将所述校准脉冲发生器依次从第一带电指示耦合传感器至第n带电指示耦合传感器的校准点注入，其中所述校准脉冲发生器包括依次串联的电压幅值为u0的校准方波、带电指示耦合传感器的电容C1及带电指示耦合传感器的电容C2；Specifically, the calibration pulse generator is sequentially injected from the calibration point of the first electrification indicating coupling sensor to the nth electrification indicating coupling sensor, wherein the calibration pulse generator includes a calibration square wave with a voltage amplitude of u 0 serially connected in series , the capacitance C 1 of the electrified indication coupling sensor and the capacitance C 2 of the electrified indication coupling sensor;
将产生的放电量q0注入到线路中，其中
在本申请实施例中以n为6为例，即将所述校准脉冲发生器依次从第一带电指示耦合传感器至第6带电指示耦合传感器的校准点注入进行校准。In the embodiment of the present application, n is 6 as an example, that is, the calibration pulse generator is injected sequentially from the calibration point of the first electrification indicating coupling sensor to the sixth electrification indicating coupling sensor for calibration.
S120：当对带电指示耦合传感器进行校准时，分别获取带电指示耦合传感器的测试点响应放电量。S120: When calibrating the electrification indicating coupling sensor, obtain the response discharge amount of the test point of the electrification indicating coupling sensor respectively.
当对第n带电指示耦合传感器进行校准时，分别获取第一带电指示耦合传感器的响应放电量q1n、第二带电指示耦合传感器q2n、第三带电指示耦合传感器q3n、第四带电指示耦合传感器q4n、第五带电指示耦合传感器q5n及第六带电指示耦合传感器q6n。When calibrating the nth electrification indication coupling sensor, the response discharge amount q 1n of the first electrification indication coupling sensor, the second electrification indication coupling sensor q 2n , the third electrification indication coupling sensor q 3n , and the fourth electrification indication coupling sensor are obtained respectively. The sensor q 4n , the fifth charge indicating coupling sensor q 5n and the sixth charge indicating coupling sensor q 6n .
S130：根据所述测试点响应放电量分别获取响应放电量比值。S130: Obtain the ratio of the response discharge amount respectively according to the response discharge amount of the test point.
当对第n带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the nth live indication coupling sensor, the response discharge ratio is:
S140：当发生局部放电时，在所述带电指示耦合传感器的测试点分别获取局放放电量。S140: When a partial discharge occurs, obtain the partial discharge amount at the test point of the electrification indicating coupling sensor, respectively.
在设备发生局部放电时，保持测量系统的灵敏度不变，测得各带电指示耦合传感器的输出响应为qx1、qx2、qx3、qx4、qx5和qx6。When partial discharge occurs in the equipment, keeping the sensitivity of the measurement system unchanged, the measured output responses of the charged indicating coupling sensors are q x1 , q x2 , q x3 , q x4 , q x5 and q x6 .
在线路发生局部放电时，保持测量系统的灵敏度不变，得到带电指示耦合传感器的输出响应，通过与在线校准时响应比值的对比确定局部放电发生的位置。When partial discharge occurs on the line, keep the sensitivity of the measurement system unchanged, obtain the output response of the charged indicating coupling sensor, and determine the location of partial discharge by comparing with the response ratio during online calibration.
S150：根据所述局放放电量获取局放放电量比值。S150: Obtain a partial discharge discharge capacity ratio according to the partial discharge discharge capacity.
所述局放放电量比值为：The partial discharge capacity ratio is:
S160：判断所述局放放电量比值与所述带电指示耦合传感器的响应放电量比值的大小，局部放电发生在与所述局放放电量比值接近的带电指示耦合传感器的附近位置。S160: Determine the magnitude of the ratio of the partial discharge discharge volume to the response discharge volume ratio of the charging indication coupling sensor, where the partial discharge occurs at a position near the charging indication coupling sensor that is close to the partial discharge discharge volume ratio.
将
在本申请实施例中，所述带电指示耦合传感器的设置个数可以为6但是不限于6；带电指示耦合传感器安装个数应按照所应用系统实际进行适当增减；所述带电指示耦合传感器包括高压电容和检测阻抗，所述高压电容和检测阻抗之间设置有局放校准接口和局放测试接口。In the embodiment of the present application, the installed number of the live indication coupling sensors may be 6 but is not limited to 6; the installed number of the live indication coupling sensors should be appropriately increased or decreased according to the actual application system; the live indication coupling sensors include: The high-voltage capacitor and the detection impedance are provided with a partial discharge calibration interface and a partial discharge test interface between the high-voltage capacitor and the detection impedance.
在本申请实施例中，以带电指示耦合传感器的个数为6，以局部放电点在校准信号注入点4附近为例，如图2所示，图2为本申请提供的基于在线校准的局部放电定位方法的运用示意图；局部放电定位的过程如下：In the embodiment of the present application, the number of the live indication coupling sensors is 6, and the partial discharge point is taken as an example near the calibration signal injection point 4, as shown in FIG. Schematic diagram of the application of the discharge localization method; the process of partial discharge localization is as follows:
在局放定位前，将电压幅值为u0的校准方波依次从第一带电指示耦合传感器至第六带电指示传感器的校准点注入，与带电指示耦合传感器的C1、C2串联构成校准脉冲发生器，并将产生的放电量q0注入到线路中，此注入的电荷量为：
依次记录第一带电指示耦合传感器指第六带电指示耦合传感器测试点的输出放电量响应；Record the output discharge response of the first electrified indicating coupling sensor to the sixth electrified indicating coupling sensor test point in turn;
记q11～q16为第一带电指示耦合传感器测试点的输出放电量，q21～q26为第二带电指示耦合传感器测试点的输出放电量，依次类推可得到第三带电指示耦合传感器至第六带电指示耦合传感器测试点的输出放电量。Denote q 11 to q 16 as the output discharge amount of the test point of the first electrified indication coupling sensor, q 21 to q 26 for the output discharge amount of the second electrified indication coupling sensor test point, and so on to obtain the third electrified indication coupling sensor to The sixth charge indicates the output discharge of the coupled sensor test point.
获取响应放电量比值：当对第一带电指示耦合传感器进行校准时，响应放电量比值为：Obtaining the ratio of response discharge: When calibrating the first electrified indicating coupling sensor, the ratio of response discharge is:
当对第二带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the second live indication coupling sensor, the response discharge ratio is:
当对第三带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the third live indication coupling sensor, the response discharge ratio is:
当对第四带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the fourth live indication coupling sensor, the response discharge ratio is:
当对第五带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the fifth live indication coupling sensor, the response discharge ratio is:
当对第六带电指示耦合传感器进行校准时，响应放电量比值为：When calibrating the sixth live indication coupling sensor, the response discharge ratio is:
在设备发生局部放电时，保持测量系统的灵敏度不变，测得各带电指示耦合传感器的输出局放放电量为qx1、qx2、qx3、qx4、qx5和qx6，计算局放放电量比值f1～f6如下：When partial discharge occurs in the equipment, keep the sensitivity of the measurement system unchanged, and measure the output partial discharge discharge of each charged indicating coupling sensor as q x1 , q x2 , q x3 , q x4 , q x5 and q x6 , calculate the partial discharge The discharge capacity ratios f 1 to f 6 are as follows:
通过对比发现，将局放放电量比值f1～f6与基准比值中第四带电指示耦合传感器注入点的响应比值最为相近，判定线路局部放电点发生在第四带电指示耦合传感器的校准信号注入点附近。Through comparison, it is found that the PD discharge volume ratios f 1 to f 6 are most similar to the response ratio of the injection point of the fourth live indication coupling sensor in the reference ratio, and it is determined that the partial discharge point of the line occurs when the calibration signal injection of the fourth live indication coupling sensor is performed. near the point.
由上述方案可见，本申请提供的基于在线校准的局部放电定位方法中，基于多个带电指示耦合传感器，在检测阻抗两端注入的脉冲电压信号，与传感器的C1、C2串联构成校准脉冲发生器，并将产生的放电量注入到线路中，在线得到各终端的响应特性；在线路发生局部放电时，保持测量系统的灵敏度不变，得到带电指示耦合传感器的输出响应，通过与在线校准时响应比值的对比确定局部放电发生的位置。本发明方法适用于具有分布参数特性的长线路及配电设备，可实现配电线路和设备局部放电的准确检测及快速定位。It can be seen from the above solution that in the partial discharge localization method based on online calibration provided by this application, the pulse voltage signal injected at both ends of the detection impedance based on a plurality of live indicating coupled sensors is connected in series with C1 and C2 of the sensor to form a calibration pulse generator. , and inject the generated discharge into the line, and obtain the response characteristics of each terminal online; when partial discharge occurs in the line, keep the sensitivity of the measurement system unchanged, and obtain the output response of the charged indicating coupling sensor. The comparison of the ratios determines where the partial discharge occurs. The method of the invention is suitable for long lines and power distribution equipment with distributed parameter characteristics, and can realize accurate detection and rapid positioning of partial discharge of power distribution lines and equipment.
由于以上实施方式均是在其他方式之上引用结合进行说明，不同实施例之间均具有相同的部分，本说明书中各个实施例之间相同、相似的部分互相参见即可。在此不再详细阐述。Since the above embodiments are all cited and combined with other modes for description, different embodiments all have the same parts, and the same and similar parts among the various embodiments in this specification can be referred to each other. It will not be elaborated here.
本领域技术人员在考虑说明书及实践这里发明的公开后，将容易想到本申请的其他实施方案。本申请旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由权利要求的内容指出。Other embodiments of the present application will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of this application and include common knowledge or common technical means in the technical field not disclosed in this application . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the content of the claims.
以上所述的本申请实施方式并不构成对本申请保护范围的限定。The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application.
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