This paper describes the design of a data acquisition system during wood kiln drying. Comparing with the traditional online acquisition system, this system can accurately collect air humidity and temperature, and wood moisture content by real-time online during wood kiln drying. The system solves the interference problem caused by multichannel signals when multichannel signals go into the system. After various analysis and comparison, this system adopted the PT1000 thermal resistance as the temperature measurement sensor, and the equilibrium moisture content was determined by measuring the moisture content of paper, and the moisture content of wood was measured by resistance method. On this basis, the system has completed the design of hardware and software, and uses a series of anti-interference measures to guarantee the stability of the system.%设计了一种木材窑干过程中的数据采集系统.与传统的在线采集系统相比较,该系统可以准确地实时在线采集到木材窑干过程中的空气温度、湿度和木材的含水率,并且解决了多路信号在进入系统时会引起的干扰问题.经过多方面的分析与比较,该系统选择了热电阻PT1000作为温度测量传感器,用测湿片测量窑内的平衡含水率来确定湿度,木材的含水率则用电阻法进行分段测量.在此之上,该系统完成了软硬件的设计,并使用了一系列的抗干扰措施以保证系统的稳定性.
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