果蔬粉含水率在线检测系统设计

Design of moisture-content detecting system for the dried powders of the fruits and vegetables

目的:为满足低含水率果蔬粉在线检测需求。方法:基于微波透射原理,设计了一套果蔬粉含水率在线检测系统。系统分为进料模块、检测模块、卸料模块和控制显示模块,并进行相应硬件和软件设计。以胡萝卜粉为试验物料,由第三方检测机构进行含水率微波透射和国标法检测比较,以评价装置检测性能。结果:该装置检测每份样品的含水率耗时约7.33 s,准确度为98.2%,重复性为0.15%。结论:基于系统设计的装置能够实现低含水率果蔬粉的在线、连续检测。

Objective:In order to meet the demand of low water-content fruit-vegetable powder online detection,a new detection system was established.Methods:Based on the microwave transmission principle,an online moisture detection system of fruit-vegetable powder was designed.The system was divided into a feed module,a detection module,a discharge module and control display module,and the corresponding hardware and software design.Carrot powders were used as the test material,and a third-party testing institution compared the two methods,including water-content microwave transmission and national standard testing,to evaluate the test performance of the device.Results:The moisture content of each sample was determined to be about 7.33 s by the new device,with an accuracy of 98.2%and repeatability of 0.15%.Conclusion:The system-based device can realize online and continuous detection of fruit-vegetable powder with low water content.