CAJ | 학술논문

基于磁弹检测机理，提出一种磁弹拉力测量改进方法，即将谐波分析法应用于磁弹信号处理，通过统计信号频域各阶次谐波幅值，引入电气工程中表征波形相对正弦波畸变程度性能参数——总谐波畸变率来表征结构拉力。采用双套筒线圈式磁弹传感器在7芯钢绞线中获取磁弹检测试验信号，对比时域与谐波分析两种处理方法的特点，结果表明，谐波分析法处理过程更为简洁，所确立的标定方程的特性参数(线性拟合方程确定系数、斜率)随统计阶次增加而趋于稳定，且均优于时域处理结果，线性拟合方程确定系数可达0.996以上。同时，应用于高压输电导线的拉力测试，结果再次验证了总谐波畸变率与拉力间的良好线性关系。针对两种试验对象，当总谐波畸变率为1时，不同谐波统计阶次对应的标定方程对拉力的估算值间的相对误差均小于3%(其中7芯钢绞线最大为2.4%，高压输电线最大为2.9%)。该方法为磁弹拉力测量提供了一种新的表征及数据处理手段。
기우자탄검측궤리，제출일충자탄랍력측량개진방법，즉장해파분석법응용우자탄신호처리，통과통계신호빈역각계차해파폭치，인입전기공정중표정파형상대정현파기변정도성능삼수——총해파기변솔래표정결구랍력。채용쌍투통선권식자탄전감기재7심강교선중획취자탄검측시험신호，대비시역여해파분석량충처리방법적특점，결과표명，해파분석법처리과정경위간길，소학립적표정방정적특성삼수(선성의합방정학정계수、사솔)수통계계차증가이추우은정，차균우우시역처리결과，선성의합방정학정계수가체0.996이상。동시，응용우고압수전도선적랍력측시，결과재차험증료총해파기변솔여랍력간적량호선성관계。침대량충시험대상，당총해파기변솔위1시，불동해파통계계차대응적표정방정대랍력적고산치간적상대오차균소우3%(기중7심강교선최대위2.4%，고압수전선최대위2.9%)。해방법위자탄랍력측량제공료일충신적표정급수거처리수단。
An improved method for elastomagnetic(EM) effect-based tension measurement is presented using harmonic analysis technique(HAT). The magnitudes of odd harmonics of EM signals are extracted to calculate the total harmonic distortion(THD), which is commonly used in electrical engineering area to represent the extent of the distortion of sinusoidal signals. The value of THD is applied for tension characterization. The EM signals are acquired by a EM sensor which is made of two coaxial solenoid coils, and then are alternatively processed in time and frequency domain. The advantages of the two signal processing methods are compared to find that the HAT is much more succinct. The determined characteristic parameters of calibration equation, such as linear regression and slope, tend to be stable as the number of orders for statistics increases. Moreover, the obtained calibration equation has better parameters, for example, the linear regression is larger than 0.996. The mentioned techniques are then applied for measuring the tension of high voltage transmission line, the experimental results testify that there is a significant linear relationship between THD and the applied tension. When the value of THD is equal to 1, the relative errors of estimated forces, which are calculated from calibration equations corresponding to various statistical harmonic orders, are less than 3% (a maximum of 2.4% for seven-wire steel strand and a maximum of 2.9% for high voltage transmission line). This study provides a new characterization and data processing method for EM-based tension measurement technology.