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粮食湿度测试仪(以下简称测湿仪)是用来测量各种粮食(如小麦、玉米、稻谷等)含水量的电子仪器。根据测量原理的差别,测湿仪可分为电阻式和电容式两大类,两者各有特点,互相不能取代。本文介绍一种新型电阻式测湿仪。其电路中的主要电子元件都采用集成电路芯片,测量结果用三位数字显示,具有自动温度补偿功能。使用时操作简单,不需调整。下面概述其设计思想和工作原理。
Food moisture tester (hereinafter referred to as the moisture meter) is used to measure various food (such as wheat, corn, rice, etc.) moisture content of electronic equipment. According to the difference between the measurement principle, the moisture meter can be divided into two major categories of resistive and capacitive, the two have their own characteristics, can not replace each other. This article describes a new type of resistive moisture meter. The circuit of the main electronic components are used integrated circuit chip, the measurement results show with three digits, with automatic temperature compensation. Easy to use without adjustment. The following outline of the design idea and working principle.