基于MSP430单片机的便携式阻抗测量系统

发布时间：2019-04-02 19:42

【摘要】：为了克服现有阻抗测量仪功耗大,体积大,价格高的问题,基于AD5934与MSP430F169设计了一种具有低功耗特性的便携式阻抗测量系统。采用超低功耗的MSP430F169作为主控芯片,通过I2C总线控制基于AD5934的阻抗测量模块完成阻抗的测量,并通过LCD液晶屏显示测量结果。RLC串联回路和R||C电路测量实验表明:该系统能精确测量待测物的阻抗值,并可测其共振频率,相对误差低至0.04%。该系统在功耗和便携性方面实现了创新,与传统的阻抗测试仪相比具有体积小、功耗低、精度高、成本低等优点,可广泛应用于普通电阻电容、水电导率、生物复阻抗等测量。
[Abstract]:In order to overcome the problems of large power consumption, large volume and high price, a portable impedance measurement system with low power consumption is designed based on AD5934 and MSP430F169. The ultra-low power consumption MSP430F169 is used as the main control chip, and the impedance measurement module based on AD5934 is controlled by I2C bus to complete the impedance measurement. The experimental results of LCD series circuit and R | C circuit show that the system can accurately measure the impedance of the object to be measured, and the resonance frequency can be measured. The relative error is as low as 0.04%. The experimental results show that the RLC series circuit and the R | C circuit can be used to measure the impedance accurately and the resonance frequency of the sample can be measured. Compared with the traditional impedance tester, the system has the advantages of small volume, low power consumption, high precision and low cost. It can be widely used in the measurement of common resistance capacitance, water conductivity, biological complex impedance, etc. The system has the advantages of small size, low power consumption, high precision and low cost, compared with the traditional impedance tester.
【作者单位】：太原理工大学信息工程学院微纳系统研究中心;太原理工大学新型传感器与智能控制教育部和山西省重点实验室;
【基金】：国家自然科学基金(61471255;61474079) 国家高技术研究发展计划(863计划)(2013AA041109;2015AA042601)
【分类号】：TM934.7

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