基于频谱计算的高精度低频段复阻抗测量装置  

High-Precision Low-Frequency Range Complex Impedance Measurement Device Based on Spectrum Calculation

作　　者：杨杰[1] 黄明[1] 郭宇航 周元翰 姜超[1] YANG Jie;HUANG Ming;GUO Yuhang;ZHOU Yuanhan;JIANG Chao(North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学信息学院,北京100144

出　　处：《工业技术创新》2023年第4期23-28,共6页Industrial Technology Innovation

摘　　要：电阻抗测量技术在工业领域电子器件特征匹配、性能评估中发挥了保障工业产品可靠性的作用,其中低频段复阻抗测量技术尤其受到关注。开发了一款高精度低频段复阻抗测量装置,根据阻抗信号的不同处理阶段,设计信号检测部分与信号运算部分,形成复阻抗测量装置系统架构。信号检测部分针对不同复阻抗灵活切换档位,实现较大带宽的测量;信号运算部分采用MSP430,基于正交分解技术搭建数字信号处理平台,具有低功耗优势。经多次迭代完善,板卡的规格尺寸最终精简为5.21 cm×5.56 cm,更具便捷性。性能测试表明,该装置可完成20Ω~400 kΩ、100 pF~10 nF的复阻抗测量,测量精度均值高达90%以上。Electrical impedance measurement technology plays an important role in ensuring the reliability of industrial products in the feature matching and performance evaluation of electronic devices in industrial fields,among which low-frequency range complex impedance measurement technology is particularly concerned.A high-precision low-frequency range complex impedance measurement device was developed.According to the different processing stages of impedance signals,the signal detection part and the signal operation part were designed to form the system architecture of the complex impedance measurement device.The signal detection part flexibly switched gears according to different complex impedances to realize the measurement of larger bandwidth;MSP430 was used in the signal operation part,and a digital signal processing platform was built based on orthogonal decomposition technology with the advantage of low power consumption.After many iterations,the size of the board was finally reduced to 5.21 cmx5.56 cm to be more convenient.The performance test shows that the device can complete the complex impedance measurement of 20 Ω~400 kΩ and 100 pF~10 nF,and the average measurement accuracyisover90%.

关 键 词：复阻抗测量 正交分解 信号检测 信号运算 低功耗 便携性 

分 类 号：TN91[电子电信—通信与信息系统]