【摘要】 便携式X射线机是典型的用弱电信号控制强电的测控设备,为了抑制干扰引入到测控系统中,必须将被测电路和控制电路在电气上实现隔离。本文设计了一种基于高精度线性光耦HCNR201的电压、电流测量电路,实现高低压侧的隔离;采用精密运放形成负反馈,保证测量的准确度。实验结果表明,基于线性光耦HCNR201的便携式X射线机管电压管电流测量电路具有良好的电气隔离性、较高的测量精度及线性度。可广泛应用于数据采集系统的输入输出硬件中。更多还原

【Abstract】 Electrical isolation is vitam to portable x-ray generator,in which high amplitude signal controlled by low voltage.This article designs the measuring circuits of voltage and current based on HCNR201,high-precision and high-linearity optocoupler,after surveying different kinds of current electrical isolators.Experimental results show that these circuits are highly stable and linear.更多还原