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在研究粮食的湿度-电阻特性和温度-电阻特性的基础上，设计了采用对数放大器和有自动温度补偿功能的信号处理电路，构成了一种智能粮食湿度测试仪。
On the basis of studying the humidity-resistance characteristic and temperature-resistance characteristic of food, a logarithmic amplifier and a signal processing circuit with automatic temperature compensation function are designed to form an intelligent food humidity tester.