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谷粒沖擊壓電力敏元件數(shù)值模擬與試驗(yàn)
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Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor
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    摘要:

    設(shè)計(jì)了一種沖量式谷物質(zhì)量流量壓電傳感器,。應(yīng)用顯式動(dòng)力學(xué)軟件LS—DYNA建立了谷?！γ粼_擊有限單元模型，數(shù)值模擬了谷粒沖擊力敏元件的過(guò)程,，研究了力敏元件材料對(duì)沖擊過(guò)程的影響,。應(yīng)用LabView軟件和高性能壓電陶瓷，開(kāi)發(fā)了谷粒沖擊力敏元件的物理樣機(jī)試驗(yàn)系統(tǒng),，對(duì)數(shù)值模擬結(jié)果進(jìn)行了檢驗(yàn),。數(shù)值模擬和試驗(yàn)研究的結(jié)果表明：在1Cr18Ni9、聚丙烯和陶瓷(Si3N4)3種力敏材料中,，陶瓷(Si3N4)是首選,；在測(cè)試系統(tǒng)中應(yīng)用所述壓電陶瓷，無(wú)須前置放大器即可以滿(mǎn)足谷物質(zhì)量流量測(cè)試要求,，極大地簡(jiǎn)化測(cè)量電路,，提高測(cè)量精度,，降低測(cè)試成本。

    Abstract:

    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. 

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高建民,郝磊斌,張剛,李揚(yáng)波,喻露.谷粒沖擊壓電力敏元件數(shù)值模擬與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(6):63-66. Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):63-66.

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