| 基于双源自动平衡电桥的高精度电感测量装置 |
| A High Precision Inductance Measuring Device Based on a Dual-source Automatic Balanced Bridge |
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| 中文摘要: |
| 为实现电感的高精度、高效率、宽范围测量，搭建了一套低失真度、低噪声交流自动平衡电桥装置。该装置能够自动调平电桥并测试电桥各部分电压比例，从而计算得到电感值。利用数字相敏检波算法（DPSD）和拟牛顿迭代法可以保证快速准确地完成电桥自动调平衡过程，采用高速数据采集卡组成同步采样系统来提高电压比例测量部分的准确度，拓宽测量范围。在100，1000，10000 Hz等典型频率下，对10 μH~10 H范围内的电感进行了测量。实验证明，该装置在一定时间内测量稳定性达5×10-6，准确度指标与阻抗分析仪对比，一致性好。 |
| 英文摘要: |
| A high precision inductance measuring device based on a dual-source automatic balanced bridge is built in order to achieve high precision, high efficiency and wide range inductance measurement. The device automatically adjusts the bridge to balance and measures the ratio of voltage across the bridge in order to calculate the inductance. Digital phase sensitive detection and parsimonious Newtonian iteration are applied to ensure that the balancing point can be found efficiently and accurately. A sampling system based on high-speed digitizers can increase precision and range of measurement. In typical frequencies including 100Hz, 1kHz and 10kHz, inductances in 10μH~10H can be measured by this device through adjusting the bridge to balance. The device can achieve a measurement stability of 5×10-6 during 90 minutes, and its accuracy is consistent with Impedance Analyzer Agilent E4980, which can be experimentally verified. |
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| 中文关键词: 交流自动平衡电桥 电感测量 数字相敏检波 数据采集卡 |
| 英文关键词:automatic balanced AC bridge inductance measurement DPSD digitizer |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2020.04.08 |
| 引用本文：李小舟，王逸洲，吴康，金海彬.基于双源自动平衡电桥的高精度电感测量装置[J].计测技术,2020,(4):. |
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