| 冲击式谷物流量传感器应变特性的有限元分析 |
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| 引用本文： | 胡均万,罗锡文.冲击式谷物流量传感器应变特性的有限元分析[J].嘉应学院学报,2011,29(8):29-33. |
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| 作者姓名： | 胡均万 罗锡文 |
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| 作者单位： | 1. 嘉应学院电子信息工程学院,广东梅州,514015
2. 华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州,510642 |
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| 摘 要： | 冲击式谷物流量传感器采用冲击板感受联合收割机出粮口谷物的冲击,并将冲击力集中到一个双孔平行梁弹性体上,通过测量弹性体的应变来测量谷物的冲击力,并换算成谷物流量.但是不同的冲击位置产生的扭矩和弯矩是不同的,扭矩变化会导致弹性体发生不同程度的扭转,弯矩变化会导致弹性体应变差异.为此,采用有限元方法分析了不同扭矩和弯矩对传感器的弹性体应变影响的规律.分析结果表明,扭矩变化时弹性体发生扭转对弹性体中心线正负3mm处的应变与扭转无关;弯矩变化对四个测试点的应变是互补的,惠斯登电桥的输出电压与力的大小成线性关系,与力的作用点无关.载荷试验结果与有限元分析的结果一致.
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| 关 键 词： | 冲击式 谷物流量传感器 有限元分析 |
Finite Element Analysis on Stress-strain Behavior of Impact-based Grain flow Sensor |
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| HU Jun-wan,LUO Xi-wen.Finite Element Analysis on Stress-strain Behavior of Impact-based Grain flow Sensor[J].Journal of Jiaying University,2011,29(8):29-33. |
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| Authors: | HU Jun-wan LUO Xi-wen |
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| Institution: | HU Jun-wan1,LUO Xi-wen2 (1.School of Electronic and Information Engineering,Jiaying University,Meizhou 514015,China,2.Key Laboratory of key Techmology on Agricultural Machine and Equipment,Ministry of Education,South china Agricnltural University,Guangzhou 510642,China) |
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| Abstract: | The plate-impact grain flow sensor detects the impact force with a plan impact,but the elastic strain of the sensor is imfluenced by the change of torque and bending moment.A finite element analysis is used to study the effect of the change of torque and bending moment on the elastic strain of the elastic beam.The analysis result shows that the effect of the bending moment on the strain of test points is significant,but it can be eliminated by a differential equation of Wheatstone bridge.Experimental result... |
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| Keywords: | Impact-based grain flow sensor finite element analysis |
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