谷粒冲击压电力敏元件数值模拟与试验  

Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor

作　　者：高建民[1] 郝磊斌[1] 张刚[1] 李扬波[1] 喻露[1] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室,镇江212013

出　　处：《农业机械学报》2009年第6期63-66,93,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2006BAD11A03);江苏省自然科学基金资助项目(BK2007090);江苏省"青蓝工程"资助项目和江苏省科技攻关资助项目(BE2007355)

摘　　要：设计了一种冲量式谷物质量流量压电传感器。应用显式动力学软件LS-DYNA建立了谷粒-力敏元件冲击有限单元模型,数值模拟了谷粒冲击力敏元件的过程,研究了力敏元件材料对冲击过程的影响。应用LabView软件和高性能压电陶瓷,开发了谷粒冲击力敏元件的物理样机试验系统,对数值模拟结果进行了检验。数值模拟和试验研究的结果表明:在1Cr18Ni9、聚丙烯和陶瓷(Si3N4)3种力敏材料中,陶瓷(Si3N4)是首选;在测试系统中应用所述压电陶瓷,无须前置放大器即可以满足谷物质量流量测试要求,极大地简化测量电路,提高测量精度,降低测试成本。A novel grain-flow yield sensor was designed. The grain-sensor impact FEM model was established with LS- DYNA software, and the impact process was simulated to discover how the sensor material influences the grain impacting sensor process. The physics grain impacting sensor test system was developed by applying LabView and a kind of high performance piezoelectric ceramic newly developed. This system was used to testify simulation result. The research shows Si3N4 is the best material of making sensor among Si3N4, PP and 1Cr18Ni9; the physics grain impacting sensor test system meets the requirement of the grain impacting sensor test without pre-amplifier by using this kind of high performance piezoelectric ceramic newly developed. The test cost is reduced greatly, the test precision is increased, and the test circuit is simplified greatly.

关 键 词：谷粒 冲量式测产传感器 数值模拟 显式动力学 冲击 试验 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置] TP703.2[自动化与计算机技术—控制科学与工程]