CN103900529A - Power transmission line inclined angle measurement device and method based on fiber bragg grating sensing technology - Google Patents
Power transmission line inclined angle measurement device and method based on fiber bragg grating sensing technology Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及传感技术领域，具体涉及基于光纤光栅传感技术的输电线倾角测量装置及其方法。The invention relates to the field of sensing technology, in particular to a transmission line inclination measuring device and method thereof based on fiber grating sensing technology.
背景技术Background technique
传统的输电线倾角测量技术以电子信息处理为基础，在测量输电线倾角时受有源供电、电磁干扰、信号远程传输不稳定、数据传输容量受限等因素制约，限制了输电线倾角测量的安全性与可靠性。Traditional transmission line inclination measurement technology is based on electronic information processing. When measuring transmission line inclination, it is restricted by factors such as active power supply, electromagnetic interference, unstable remote signal transmission, and limited data transmission capacity, which limits the application of transmission line inclination measurement. Safety and reliability.
发明内容Contents of the invention
本发明所要解决的技术问题传统的输电线倾角测量受有源供电、电磁干扰、信号远程传输不稳定、数据传输容量受限等因素制约，限制了输电线倾角测量的安全性与可靠性。Technical Problems to be Solved by the Invention Traditional transmission line inclination measurement is restricted by factors such as active power supply, electromagnetic interference, unstable remote signal transmission, and limited data transmission capacity, which limit the safety and reliability of transmission line inclination measurement.
为此目的，本发明提出基于光纤光栅传感技术的输电线倾角测量装置，该装置包括：For this purpose, the present invention proposes the transmission line inclination measuring device based on fiber grating sensing technology, and this device comprises:
数据采集模块，用于实时采集待测输电线的温度及应变变化数据，所述数据采集模块包括两个光纤光栅应变传感器及一个三角架，所述三角架的三条边包括一条固定长度的边以及两条长度可变的边，每条长度可变的边上安装一个所述光纤光栅应变传感器；The data acquisition module is used to collect the temperature and strain change data of the transmission line to be tested in real time. The data acquisition module includes two fiber grating strain sensors and a tripod. The three sides of the tripod include a fixed-length side and Two sides with variable length, each of which is equipped with a fiber grating strain sensor;
光信号收发与解调模块，用于向数据采集模块发射所述光纤光栅解调仪产生的窄带扫频光以及将接收的光信号解调；The optical signal transceiver and demodulation module is used to transmit the narrow-band sweep light generated by the fiber grating demodulator to the data acquisition module and demodulate the received optical signal;
数据处理模块，用于从解调后的光信号中获取待测输电线的温度及应变变化数据，并计算待测输电线倾角。The data processing module is used to obtain the temperature and strain change data of the transmission line to be tested from the demodulated optical signal, and calculate the inclination angle of the transmission line to be measured.
其中，所述光纤光栅应变传感器包括温度补偿光栅及应变光栅，所述温度补偿光栅用于补偿应变光栅的温度交叉敏感。Wherein, the fiber grating strain sensor includes a temperature compensation grating and a strain grating, and the temperature compensation grating is used for compensating the temperature cross sensitivity of the strain grating.
其中，所述数据采集模块中的光纤光栅应变传感器的中心波长的实时值根据实时采集的数据确定。Wherein, the real-time value of the central wavelength of the fiber Bragg grating strain sensor in the data acquisition module is determined according to the data collected in real time.
其中，所述光信号收发与解调模块包括光信号收发单元及光纤光栅解调仪，所述光信号收发单元用于向数据采集模块发射所述光纤光栅解调仪产生的窄带扫频光以及将接收的光信号发射到所述光纤光栅解调仪；所述光纤光栅解调仪用于解调光信号。Wherein, the optical signal transceiving and demodulation module includes an optical signal transceiving unit and a fiber grating demodulator, and the optical signal transceiving unit is used to transmit the narrowband frequency sweep light generated by the fiber grating demodulator to the data acquisition module and Transmitting the received optical signal to the fiber grating demodulator; the fiber grating demodulator is used to demodulate the optical signal.
其中，所述数据采集模块的光纤光栅应变传感器与所述光信号收发与解调模块通过光纤复合架空地线或者光纤复合相线连接。Wherein, the optical fiber grating strain sensor of the data acquisition module is connected to the optical signal transceiving and demodulation module through an optical fiber composite overhead ground wire or an optical fiber composite phase wire.
其中，所述数据采集模块进一步包括两个劲度系数相同且已知的弹簧，一个弹簧与一个光纤光栅应变传感器并联安装在三角架一条长度可变的边上，另一个弹簧与另一个光纤光栅应变传感器并联安装在三角架另一条长度可变的边上。Wherein, the data acquisition module further includes two springs with the same stiffness coefficient and known, one spring is installed in parallel with a fiber grating strain sensor on a variable-length side of the tripod, and the other spring is connected with another fiber grating The strain sensor is installed in parallel on the other side with variable length of the tripod.
其中，所述光纤光栅应变传感器包括光纤光栅位移传感器，所述光纤光栅位移传感器用于采集待测输电线的温度、应变变化数据，并计算三角架长度可变的边的实时位移变化数据。Wherein, the fiber Bragg grating strain sensor includes a fiber Bragg grating displacement sensor, and the fiber Bragg grating displacement sensor is used to collect temperature and strain change data of the transmission line to be tested, and calculate real-time displacement change data of the variable-length side of the tripod.
其中，所述数据处理模块具体用于从解调后的光信号中获取实时的待测输电线的温度及应变变化数据，确定光纤光栅应变传感器的中心波长的实时值，根据所述中心波长的实时值得到长度可变的边的位移变化，计算三角架长度可变的边的实时边长，并通过余弦定理计算待测输电线倾角。Wherein, the data processing module is specifically used to obtain real-time temperature and strain change data of the transmission line to be measured from the demodulated optical signal, determine the real-time value of the central wavelength of the fiber grating strain sensor, The real-time value obtains the displacement change of the variable-length side, calculates the real-time side length of the variable-length side of the tripod, and calculates the inclination angle of the transmission line to be measured by the cosine law.
较佳的，该装置还包括客户端模块，用于电子地理显示、电网参量监测、日志查询和帮助。Preferably, the device also includes a client module for electronic geographic display, power grid parameter monitoring, log query and help.
基于上述装置进行倾角测量的方法，该方法包括：A method for measuring inclination based on the above-mentioned device, the method comprising:
S1.通过数据采集模块实时采集待测输电线的温度及应力变化的数据，所述数据采集模块中的光纤光栅应变传感器的中心波长的实时值根据实时采集的数据确定；S1. collect in real time the data of the temperature of transmission line to be measured and the stress change by data acquisition module, the real-time value of the central wavelength of the fiber grating strain sensor in the said data acquisition module is determined according to the data collected in real time;
S2.通过光信号收发与解调模块向所述数据采集模块发射窄带扫频光；S2. Transmitting narrowband frequency-sweeping light to the data acquisition module through the optical signal transceiver and demodulation module;
S3.将与光纤光栅应变传感器的中心波长相同波长的窄带扫频光反射到光信号收发与解调模块；S3. Reflecting the narrow-band sweep light with the same wavelength as the center wavelength of the FBG strain sensor to the optical signal transceiver and demodulation module;
S4.将光信号收发与解调模块接收到的光信号进行功率检测，并将所述光信号解调为波长编码的数字信号；S4. Perform power detection on the optical signal received by the optical signal transceiver and demodulation module, and demodulate the optical signal into a wavelength-coded digital signal;
S5.根据得到的数字信号，从中获取待测输电线的温度及应力变化数据并计算三角架长度可变的边的实时位移变化数据，根据位移变化确定数据处理模块中三角架的长度可变的边的长度，用余弦定理计算待测输电线倾角。S5. According to the obtained digital signal, obtain the temperature and stress change data of the transmission line to be measured therefrom and calculate the real-time displacement change data of the variable length side of the tripod, and determine the variable length of the tripod in the data processing module according to the displacement change Use the cosine law to calculate the inclination angle of the transmission line to be measured.
相比于现有技术，本发明提供的方法的有益效果是：本发明所采用的光纤光栅传感器具有无源化、抗电磁干扰、精度高、体积小质量轻、扰抗腐蚀等特点，并且它可以集信息传感与传输于一身，一个传感器包含两个光栅，对波长变化进行做差处理，这样可以有效地排除光纤光栅传感器对应变及温度交叉敏感的干扰，排除温度对应变的影响，使结果更精确。Compared with the prior art, the beneficial effect of the method provided by the present invention is: the fiber grating sensor adopted in the present invention has the characteristics of passive, anti-electromagnetic interference, high precision, small size, light weight, interference and corrosion resistance, etc., and it It can integrate information sensing and transmission. One sensor contains two gratings, and the difference processing is performed on the wavelength change. This can effectively eliminate the interference of the fiber grating sensor on strain and temperature cross-sensitivity, and eliminate the influence of temperature on strain. The result is more precise.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，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 more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1示出了基于光纤光栅传感技术的输电线倾角测量装置结构图；Fig. 1 shows the structural diagram of the transmission line inclination measurement device based on fiber grating sensing technology;
图2示出了应用基于光纤光栅传感技术的输电线倾角测量装置进行倾角测量的方法流程图；Fig. 2 shows the method flow chart of applying the transmission line inclination measuring device based on fiber grating sensing technology to carry out inclination measurement;
图3示出了实施例1中的数据采集模块；Fig. 3 shows the data acquisition module in embodiment 1;
图4示出了实施例2中的数据采集模块。FIG. 4 shows the data acquisition module in Embodiment 2.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
基于光纤光栅传感技术的输电线倾角测量装置，如图1所示，该装置包括：The transmission line inclination measurement device based on fiber grating sensing technology, as shown in Figure 1, the device includes:
数据采集模块，用于实时采集待测输电线的温度及应变变化数据，所述数据采集模块包括两个光纤光栅应变传感器及一个三角架，所述三角架的三条边包括一条固定长度的边以及两条长度可变的边，每条长度可变的边上安装一个所述光纤光栅应变传感器；The data acquisition module is used to collect the temperature and strain change data of the transmission line to be tested in real time. The data acquisition module includes two fiber grating strain sensors and a tripod. The three sides of the tripod include a fixed-length side and Two sides with variable length, each of which is equipped with a fiber grating strain sensor;
光信号收发与解调模块，用于向数据采集模块发射所述光纤光栅解调仪产生的窄带扫频光以及将接收的光信号解调；The optical signal transceiver and demodulation module is used to transmit the narrow-band frequency sweep light generated by the fiber grating demodulator to the data acquisition module and demodulate the received optical signal;
数据处理模块，用于从解调后的光信号中获取待测输电线的温度及应变变化数据，并计算待测输电线倾角。The data processing module is used to obtain the temperature and strain change data of the transmission line to be tested from the demodulated optical signal, and calculate the inclination angle of the transmission line to be tested.
其中，所述光纤光栅应变传感器包括温度补偿光栅及应变光栅，所述温度补偿光栅用于补偿应变光栅的温度交叉敏感。Wherein, the fiber grating strain sensor includes a temperature compensation grating and a strain grating, and the temperature compensation grating is used for compensating the temperature cross sensitivity of the strain grating.
其中，所述数据采集模块中的光纤光栅应变传感器的中心波长的实时值根据实时采集的数据确定。Wherein, the real-time value of the center wavelength of the fiber Bragg grating strain sensor in the data acquisition module is determined according to the data collected in real time.
其中，所述光信号收发与解调模块包括光信号收发单元及光纤光栅解调仪，所述光信号收发单元用于向数据采集模块发射所述光纤光栅解调仪产生的窄带扫频光以及将接收的光信号发射到所述光纤光栅解调仪；所述光纤光栅解调仪用于解调光信号。Wherein, the optical signal transceiving and demodulation module includes an optical signal transceiving unit and a fiber grating demodulator, and the optical signal transceiving unit is used to transmit the narrowband frequency sweep light generated by the fiber grating demodulator to the data acquisition module and Transmitting the received optical signal to the fiber grating demodulator; the fiber grating demodulator is used to demodulate the optical signal.
其中，所述数据采集模块的光纤光栅应变传感器与所述光信号收发与解调模块通过光纤复合架空地线或者光纤复合相线连接。Wherein, the optical fiber grating strain sensor of the data acquisition module is connected to the optical signal transceiving and demodulation module through an optical fiber composite overhead ground wire or an optical fiber composite phase wire.
其中，所述数据采集模块进一步包括两个劲度系数相同且已知的弹簧，一个弹簧与一个光纤光栅应变传感器并联安装在三角架一条长度可变的边上，另一个弹簧与另一个光纤光栅应变传感器并联安装在三角架另一条长度可变的边上。Wherein, the data acquisition module further includes two springs with the same stiffness coefficient and known, one spring is installed in parallel with a fiber grating strain sensor on a variable-length side of the tripod, and the other spring is connected with another fiber grating The strain sensor is installed in parallel on the other side with variable length of the tripod.
其中，所述光纤光栅应变传感器包括光纤光栅位移传感器，所述光纤光栅位移传感器用于采集待测输电线的温度、应变变化数据，并计算三角架长度可变的边的实时位移变化数据。Wherein, the fiber Bragg grating strain sensor includes a fiber Bragg grating displacement sensor, and the fiber Bragg grating displacement sensor is used to collect temperature and strain change data of the transmission line to be tested, and calculate real-time displacement change data of the variable-length side of the tripod.
其中，所述数据处理模块具体用于从解调后的光信号中获取实时的待测输电线的温度及应变变化数据，确定光纤光栅应变传感器的中心波长的实时值，根据所述中心波长的实时值得到长度可变的边的位移变化，计算三角架长度可变的边的实时边长，并通过余弦定理计算待测输电线倾角。Wherein, the data processing module is specifically used to obtain real-time temperature and strain change data of the transmission line to be measured from the demodulated optical signal, determine the real-time value of the central wavelength of the fiber grating strain sensor, The real-time value obtains the displacement change of the variable-length side, calculates the real-time side length of the variable-length side of the tripod, and calculates the inclination angle of the transmission line to be measured by the cosine law.
较佳的，该装置还包括客户端模块，用于电子地理显示、电网参量监测、日志查询和帮助。Preferably, the device also includes a client module for electronic geographic display, power grid parameter monitoring, log query and help.
基于上述装置进行倾角测量的方法，如图2所示，该方法包括：The method for measuring inclination based on the above-mentioned device, as shown in Figure 2, the method includes:
S1.通过数据采集模块实时采集待测输电线的温度及应力变化的数据，所述数据采集模块中的光纤光栅应变传感器的中心波长的实时值根据实时采集的数据确定；S1. collect in real time the data of the temperature of transmission line to be measured and the stress change by data acquisition module, the real-time value of the central wavelength of the fiber grating strain sensor in the said data acquisition module is determined according to the data collected in real time;
S2.通过光信号收发与解调模块向所述数据采集模块发射窄带扫频光；S2. Transmitting narrowband frequency-sweeping light to the data acquisition module through the optical signal transceiver and demodulation module;
S3.将与光纤光栅应变传感器的中心波长相同波长的窄带扫频光反射到光信号收发与解调模块；S3. Reflecting the narrow-band sweep light with the same wavelength as the center wavelength of the FBG strain sensor to the optical signal transceiver and demodulation module;
S4.将光信号收发与解调模块接收到的光信号进行功率检测，并将所述光信号解调为波长编码的数字信号；S4. Perform power detection on the optical signal received by the optical signal transceiver and demodulation module, and demodulate the optical signal into a wavelength-coded digital signal;
S5.根据得到的数字信号，从中获取待测输电线的温度及应力变化数据并计算三角架长度可变的边的实时位移变化数据，根据位移变化确定数据处理模块中三角架的长度可变的边的长度，用余弦定理计算待测输电线倾角。S5. According to the obtained digital signal, obtain the temperature and stress change data of the transmission line to be measured therefrom and calculate the real-time displacement change data of the variable length side of the tripod, and determine the variable length of the tripod in the data processing module according to the displacement change Use the cosine law to calculate the inclination angle of the transmission line to be measured.
实施例1：Example 1:
本实施例公开一种应用于测量架空线覆冰厚度的基于光纤光栅传感技术的输电线倾角测量装置，该装置包括：This embodiment discloses a transmission line inclination measurement device based on fiber Bragg grating sensing technology, which is applied to measure the ice thickness of overhead lines. The device includes:
数据采集模块，用于实时采集待测架空输电线的温度及应变变化数据，所述数据采集模块包括两个光纤光栅应变传感器、两个劲度系数相同且已知的弹簧及一个三角架，所述三角架的三条边包括一条固定长度的边以及两条长度可变的边，每条长度可变的边上安装一个所述光纤光栅应变传感器；一个弹簧与一个光纤光栅应变传感器并联安装在三角架的一条长度可变的边上，另一个弹簧与另一个光纤光栅应变传感器并联安装在三角架的另一条长度可变的边上；The data acquisition module is used to collect the temperature and strain change data of the overhead transmission line to be tested in real time. The data acquisition module includes two fiber grating strain sensors, two springs with the same stiffness coefficient and known, and a tripod. The three sides of the tripod include a fixed-length side and two variable-length sides, and a fiber grating strain sensor is installed on each variable-length side; a spring and a fiber grating strain sensor are installed in parallel on the triangle On one variable-length side of the tripod, another spring is installed in parallel with another fiber grating strain sensor on the other variable-length side of the tripod;
本实施例中，如图3所示，一个传感器固定在架空线上，且与之平行，可同步感应架空线的应变；与该传感器并联的弹簧与架空线平行，可同步发生形变，伸长或缩短；绝缘子串用于支撑架空线使架空线与杆塔，保证线路具有可靠的电气绝缘强度；图3中三角架中实线为三角架与绝缘子串的连接和固定杆；所述固定杆与传感器在空间上无交集，被传感器遮挡。In this embodiment, as shown in Figure 3, a sensor is fixed on the overhead line and parallel to it, and can sense the strain of the overhead line synchronously; the spring connected in parallel with the sensor is parallel to the overhead line, and can deform and elongate simultaneously. or shorten; the insulator string is used to support the overhead line to make the overhead line and the pole tower, to ensure that the line has reliable electrical insulation strength; the solid line in the tripod in Fig. 3 is the connection and the fixed rod of the tripod and the insulator string; the fixed rod and Sensors have no intersection in space and are blocked by sensors.
光信号收发与解调模块，所述光信号收发与解调模块包括光信号收发单元及光纤光栅解调仪，所述光信号收发单元用于向数据采集模块发射所述光纤光栅解调仪产生的窄带扫频光以及将接收的光信号发射到所述光纤光栅解调仪；所述光纤光栅解调仪用于解调光信号。An optical signal transceiver and demodulation module, the optical signal transceiver and demodulation module includes an optical signal transceiver unit and an optical fiber grating demodulator, and the optical signal transceiver unit is used to transmit the optical signal generated by the optical fiber grating demodulator to the data acquisition module The narrow-band sweep light and transmit the received optical signal to the fiber grating demodulator; the fiber grating demodulator is used to demodulate the optical signal.
数据处理模块，用于从解调后的光信号中获取待测架空输电线的温度及应变变化数据，并计算待测架空输电线倾角；The data processing module is used to obtain the temperature and strain change data of the overhead transmission line to be tested from the demodulated optical signal, and calculate the inclination angle of the overhead transmission line to be measured;
客户端模块，用于电子地理显示、电网参量监测、日志查询和帮助。The client module is used for electronic geographic display, grid parameter monitoring, log query and help.
其中，所述光纤光栅应变传感器包括温度补偿光栅及应变光栅，所述温度补偿光栅用于补偿应变光栅的温度交叉敏感。Wherein, the fiber grating strain sensor includes a temperature compensation grating and a strain grating, and the temperature compensation grating is used for compensating the temperature cross sensitivity of the strain grating.
其中，所述数据采集模块的安装在三角架两个可变长度边结构上的光纤光栅传感器，通过光纤复合架空地线OPGW或光纤复合相线OPPC接续盒与其中的光纤串接。所述OPGW/OPPC是把光纤放置在架空高压输电线的地线/相线中，用以构成输电线路上的光纤通信网，这种结构形式兼具地线/相线与通信双重功能。Wherein, the fiber grating sensor installed on the two variable-length side structures of the tripod of the data acquisition module is serially connected to the optical fiber therein through the optical fiber composite overhead ground wire OPGW or the optical fiber composite phase wire OPPC connection box. The OPGW/OPPC is to place the optical fiber in the ground wire/phase wire of the overhead high-voltage transmission line to form an optical fiber communication network on the transmission line. This structure has dual functions of the ground wire/phase wire and communication.
应用上述装置进行倾角测量的方法包括：The method of using the above-mentioned device to measure the inclination angle includes:
S1.通过数据采集模块实时采集待测输电线的温度及应力变化的数据，所述数据采集模块中的光纤光栅应变传感器的中心波长的实时值根据实时采集的数据确定；S1. collect in real time the data of the temperature of transmission line to be measured and the stress change by data acquisition module, the real-time value of the central wavelength of the fiber grating strain sensor in the said data acquisition module is determined according to the data collected in real time;
S2.通过光信号收发与解调模块向所述数据采集模块发射窄带扫频光；S2. Transmitting narrowband frequency-sweeping light to the data acquisition module through the optical signal transceiver and demodulation module;
S3.数据采集模块中三角形结构两个长度可变边上的光纤光栅应变传感器，反射回与其中心波长相比配的光谱，该光谱携带了架空输电线实时温度、应变变化的相关信息；S3. The fiber grating strain sensors on the two variable length sides of the triangular structure in the data acquisition module reflect back the spectrum matched with its central wavelength, which carries the relevant information about the real-time temperature and strain changes of the overhead transmission line;
S4.将光信号收发与解调模块接收到的光信号进行功率检测，并将所述光信号解调为波长编码的数字信号；S4. Perform power detection on the optical signal received by the optical signal transceiver and demodulation module, and demodulate the optical signal into a wavelength-coded digital signal;
S5.根据得到的数字信号，从中获取待测输电线的温度及应力变化数据并计算三角架长度可变的边的实时位移变化数据，根据位移变化确定数据处理模块中三角架的长度可变的边的长度，用余弦定理计算待测输电线倾角。S5. According to the obtained digital signal, obtain the temperature and stress change data of the transmission line to be measured therefrom and calculate the real-time displacement change data of the variable length side of the tripod, and determine the variable length of the tripod in the data processing module according to the displacement change Use the cosine law to calculate the inclination angle of the transmission line to be measured.
步骤S5具体包括：数字信号进入数据处理模块后，由携带温度信息的波长信号可计算出电力线的温度。同一组（共两组）内两个光纤光栅测得的波长数据再通过做差的方式，来补偿传感器由于对应变及温度交叉敏感引起的信号波长的误差。计算出实时应力的变化量，其值与弹簧（已知劲度系数）弹力的变化量相同，进而可以求得弹簧的伸缩量，获得实时三角架三个边的长度，通过余弦定理可求得实时倾角变化。架空线状态得到确定，即可以计算出电力线的对应的覆冰厚度值。Step S5 specifically includes: after the digital signal enters the data processing module, the temperature of the power line can be calculated from the wavelength signal carrying temperature information. The wavelength data measured by the two fiber gratings in the same group (two groups in total) are compensated for the signal wavelength error caused by the sensor’s cross-sensitivity to strain and temperature by making a difference. Calculate the change in real-time stress, which is the same as the change in spring force (known stiffness coefficient), and then you can get the stretching amount of the spring, and get the length of the three sides of the real-time tripod, which can be obtained by the law of cosines Real-time inclination changes. The state of the overhead line is determined, that is, the corresponding ice thickness value of the power line can be calculated.
数据处理模块的告警系统会根据覆冰厚度值，予以相应判断给出低级报警、中级告警或高级告警，并将判断结果传输到客户端模块。此外，上述过程的重要数据都被保存进数据库，以便查询。The alarm system of the data processing module will make a corresponding judgment based on the ice thickness value and give a low-level alarm, a medium-level alarm or a high-level alarm, and transmit the judgment result to the client module. In addition, the important data of the above process are all saved into the database for easy query.
实施例2：Example 2:
本实施例与实施例1的不同之处在于：数据采集模块直接采用的是光纤光栅位移传感器。它可以直接获得位移的变化情况，可同时监测架空线温度、应变变化。光纤光栅位移传感器布设在三角形结构两个可变长度的边上，如图4所示，光纤光栅位移传感器平行布设在三角形结构的两个可变边上，三角形结构第三个边为固定边（长度不变）。其中一个传感器与架空线平行，可同步感应架空线的应变（或位移）。本实施例求解倾角的过程与实施例1相同，均是依据获得三角形三边数据，使用余弦定理，求得所求角的值。The difference between this embodiment and Embodiment 1 is that the data acquisition module directly uses a fiber grating displacement sensor. It can directly obtain the change of displacement, and can monitor the temperature and strain change of the overhead line at the same time. The FBG displacement sensor is arranged on the two variable length sides of the triangular structure. As shown in Figure 4, the FBG displacement sensor is arranged in parallel on the two variable sides of the triangular structure, and the third side of the triangular structure is a fixed side ( length remains the same). One of the sensors is parallel to the overhead line and simultaneously senses the strain (or displacement) of the overhead line. The process of calculating the inclination angle in this embodiment is the same as that in Embodiment 1, which is to obtain the value of the angle to be obtained by using the law of cosines based on the obtained trilateral data of a triangle.
虽然结合附图描述了本发明的实施方式，但是本领域技术人员可以在不脱离本发明的精神和范围的情况下做出各种修改和变型，这样的修改和变型均落入由所附权利要求所限定的范围之内。Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. within the bounds of the requirements.
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