基于近红外光谱的小麦水分检测仪设计

Design of Wheat Moisture Detector Based on Near Infrared Spectroscopy

针对小麦水分快速连续测量的要求,设计了一型基于近红外光谱原理的小麦水分检测仪。该仪器采用半导体激光器和高灵敏度光电接收管构建稳定的光路系统,采用相关检测、软件滤波等方法提取微弱小麦水分信号,并与标准水分含量小麦对比,得到了小麦水分的工作函数,实际测量误差最大为2.76%。试验表明:该仪器通过高稳定光路系统和高信噪比弱信号提取电路,提高了仪器稳定器和测量精度,测试误差满足设计要求。

According to the requirement of rapid and continuous measurement of wheat moisture,we designed a type of wheat moisture moisture detector based on near infrared spectroscopy.The instrument used semiconductor laser and high sensitive photoelectric receiving tube to construct a stable optical path system,and the weak wheat water signal was extracted by relevant detection and software filtering models.Compared with the standard water content of the wheat,the working function of wheat moisture was obtained.The actual measurement error was less than 2.76%.The test showed that the instrument improved the instrument stabilizer and measurement accuracy by means of high stable light optical circuit and high signal to noise ratio weak signal extraction circuit,and the test error was consistent with the design requirements.