果蔬热导率测试系统设计和试验 2006.pdf

2 0 0 6 年 1 月 农 业 机 械 学 报 第 37 卷 第 1 期 果蔬热导率测试系统设计和试验 张　敏　赵惠忠　谢　晶　孙治强　张百良 　　【摘要】　果蔬的热导率是农业生产加工领域中重要的热物性参数。传统测量方法存在许多难以克服的困难, 造成测试数据离散度大, 难以有效指导生产实际。阐述了一种新型热探针测试系统的测量原理、测控电路和采取的 抗干扰措施, 试验数据证明该系统用于测试果蔬热导率的准确性和可靠性, 具有良好的应用前景。 关键词: 果蔬　热导率　测试系统　热探针 中图分类号: T S255 3; O 5513 文献标识码: A Study on M ea surem en t System of Therma l Conductiv ity of Vegetables and Fruits 1 2 2 1 1 Zhang M in 　Zhao H u izhong 　X ie J ing 　Sun Zh iqiang 　Zhang Bailiang ( 1 　2 ) H e ’nan A g ricu ltu ra l U n iversity S hang ha i F isheries U n iversity Abstract T he therm al conductivities of vegetab les and fru its are im po rtan t therm ophysical param eters . in agricu ltu ral indu stry p rocess A nd the traditional m easu rem en t m ethods are no t satisfied becau se the data of m easu rem en t are so differen t in every test that they are difficu lt to direct the . indu strial p rocess qu ite w ell In th is paper the m easu rem en t p rincip les and circu it and an ti . in terference m ean s of the therm al p robe m easu rem en t system are in troduced in detail T he experim en tal resu lts show clearly that th is m ethod is accu rate, reliab le and p rom ising in