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周江. 智慧农业中的隔离放大器设计[J]. 农业工程, 2017, 7(2): 39-43.
引用本文: 周江. 智慧农业中的隔离放大器设计[J]. 农业工程, 2017, 7(2): 39-43.
Zhou Jiang. Design of Isolation Amplifier Used in Wisdom Agriculture[J]. AGRICULTURAL ENGINEERING, 2017, 7(2): 39-43.
Citation: Zhou Jiang. Design of Isolation Amplifier Used in Wisdom Agriculture[J]. AGRICULTURAL ENGINEERING, 2017, 7(2): 39-43.

智慧农业中的隔离放大器设计

Design of Isolation Amplifier Used in Wisdom Agriculture

  • 摘要: 在智慧农业的传感器数据采集系统中,从系统抗干扰性能考虑,传感器的输出信号与采集系统是不共地的,这就需要设计隔离放大器,将传感器的输出信号尽量不失真地传输给采集系统。为此,使用高线性度模拟光电耦合器HCNR200设计了两种隔离放大器,分别能对单极性电压和双极性电压进行隔离传输。介绍了根据不同的输入电压计算电路参数的方法,并给出相应的电路原理图。最后,通过试验验证了所设计电路的正确性和可行性。

     

    Abstract: In sensor information collecting system of wisdom agriculture,considering ability of anti-interference of system,output signal of the sensor and collection system do not share the ground.This requires a isolation amplifier,it can transmit output signal of sensor to collection system without distortion.Therefor,two isolation amplifiers was designed with high-linearity analog optocouplers HCNR200,they could isolate unipolar voltage and bipolar voltage respectively.Method of calculating circuit parameters according to different input voltage was explained in detail,and the corresponding circuit diagram was given.Finally,correctness and feasibility of designed circuit was verified by experiments.

     

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