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

    設計了一種沖量式谷物質(zhì)量流量壓電傳感器。應用顯式動力學軟件LS—DYNA建立了谷粒—力敏元件沖擊有限單元模型，數(shù)值模擬了谷粒沖擊力敏元件的過程，研究了力敏元件材料對沖擊過程的影響。應用LabView軟件和高性能壓電陶瓷，開發(fā)了谷粒沖擊力敏元件的物理樣機試驗系統(tǒng)，對數(shù)值模擬結(jié)果進行了檢驗。數(shù)值模擬和試驗研究的結(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；在測試系統(tǒng)中應用所述壓電陶瓷，無須前置放大器即可以滿足谷物質(zhì)量流量測試要求，極大地簡化測量電路，提高測量精度，降低測試成本。

    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,李揚波,喻露.谷粒沖擊壓電力敏元件數(shù)值模擬與試驗[J].農(nóng)業(yè)機械學報,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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