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修改时间 06-20-2016 11:59 PM
中国很多工程上使用的传感器输出电压都是0~20V,但是Ni的板卡最大采集电压是+-10V,请教一些有经验的工程师,如何处理该问题?当然,最简单的方法就是传感器输出端,串联两个大电阻分压,但这样会降低采集系统的灵敏度,渴望更好的处理方式?
修改时间 06-22-2016 01:17 AM
光电耦合器是不是行?光电耦合器不是可以除去干扰,然后得到的电压你再去变压,这样是不是能行?
修改时间 07-13-2016 01:19 AM
加一个信号隔离器,出入信号0~20V,输出信号0-10V,因为信号特殊可能需要定制,给你推荐一个厂家:上海苏菲电气,前不久我刚用过他们的一个信号隔离器4-20mA转0-10V,效果蛮好的。
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