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称重传感器_电阻应变式传感器的测量转换电路
发布日期:2012-10-22 15:34:30

应变计将应变的变化转换成电阻的相对变化还需将这种变化转换为电压或电流的变化,才能用电测仪表进行测量。通常采用电桥电路文现微小阻值变化的转换。根据激励电源不同,有直流电桥和交流电桥两种。
    1.直流电桥
    直流电桥的基本形式,它是由连接成环形的四个桥臂组成的

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