电阻应变电桥的激励源对测试灵敏度的影响
发布时间：2018-11-02 20:39
【摘要】：【目的】随着电阻应变片制造工艺的提高,电阻应变片不仅在称量装置中应用广泛,在低功耗形变检测系统中也应能得到应用。由此研究了在低电压工作环境下电桥激励源对测试灵敏度的影响。【方法】整个测试系统在3.3V的电压下工作,在实验中改变电桥的激励电压和激励电流,将电桥输出电压经高共模抑制比仪表放大器INA333放大后通过模数转换器ADS1118采集后显示。【结果】3V激励电压提高到5V激励电压时每克导致的输出电压变化幅度增加66.9%,激励电流每增加1mA,输出电压灵敏度增加0.16。【结论】激励电压和激励电流的增大有利于提高电桥输出电压,提高测试微小形变的灵敏度,降低后级数模转换电路要求。
[Abstract]:[objective] with the improvement of resistance strain gauge manufacturing technology, resistive strain gauge is not only widely used in weighing device, but also can be used in low power deformation detection system. In this paper, the influence of bridge excitation source on test sensitivity in low voltage working environment is studied. [methods] the whole test system works at 3.3 V voltage, and the excitation voltage and current of the bridge are changed in the experiment. The output voltage of the bridge is amplified by the INA333 amplifier of the high common-mode rejection ratio instrument, and then displayed by the analog-to-digital converter ADS1118. [results] when the excitation voltage of 3V is increased to 5V, the amplitude of the output voltage change per gram is increased by 66.9%. The sensitivity of output voltage is increased by 0.16 for every 1 Ma of excitation current. [conclusion] the increase of excitation voltage and current is beneficial to increase the output voltage of bridge, improve the sensitivity of measuring small deformation, and reduce the requirement of digital to analog conversion circuit.
【作者单位】： 重庆师范大学物理与电子工程学院光电功能材料重庆市重点实验室;
【基金】：国家自然科学基金(No.51507023) 重庆市科委项目(No.CSTC2016JCYJA0920) 重庆市基础与前沿研究计划项目(No.CSTC2014JCYJA70005)
【分类号】：TM938.4
本文编号：2306886
[Abstract]:[objective] with the improvement of resistance strain gauge manufacturing technology, resistive strain gauge is not only widely used in weighing device, but also can be used in low power deformation detection system. In this paper, the influence of bridge excitation source on test sensitivity in low voltage working environment is studied. [methods] the whole test system works at 3.3 V voltage, and the excitation voltage and current of the bridge are changed in the experiment. The output voltage of the bridge is amplified by the INA333 amplifier of the high common-mode rejection ratio instrument, and then displayed by the analog-to-digital converter ADS1118. [results] when the excitation voltage of 3V is increased to 5V, the amplitude of the output voltage change per gram is increased by 66.9%. The sensitivity of output voltage is increased by 0.16 for every 1 Ma of excitation current. [conclusion] the increase of excitation voltage and current is beneficial to increase the output voltage of bridge, improve the sensitivity of measuring small deformation, and reduce the requirement of digital to analog conversion circuit.
【作者单位】： 重庆师范大学物理与电子工程学院光电功能材料重庆市重点实验室;
【基金】：国家自然科学基金(No.51507023) 重庆市科委项目(No.CSTC2016JCYJA0920) 重庆市基础与前沿研究计划项目(No.CSTC2014JCYJA70005)
【分类号】：TM938.4
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