平行梁冲量式谷物质量流量传感器弹性元件设计  

Load cell design for parallel beam impact-based grain mass sensor

作　　者：周俊[1] 刘成良[2] 

机构地区：[1]南京农业大学工学院,南京210031 [2]上海交通大学机电控制研究所,上海200030

出　　处：《农业工程学报》2007年第4期110-114,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：上海市科委重点攻关项目(03dz19302)

摘　　要：冲量式传感器具有结构简单、使用方便等优点,但容易受到基础振动的干扰。为此设计了平行梁结构冲量式谷物质量流量传感器弹性元件,对弹性元件安装端部采用了削弱设计。有限元分析表明该设计方案不仅符合应力集中原则,而且可以提高传感器抵抗振动干扰的能力。给出了传感器电桥电路,以及后续放大、电压电流变换等调理电路,使得传感器输出零点可以方便调节,降低了传感器在联合收割机上的安装要求。试验结果表明,传感器线性度误差小于0.1%,输出不受外力作用点的影响,同时具备了合适的工作频带宽度。Impactabased grain mass senor possesses simple structure and can be applied easily,but it is sensitive to the base vibration caused by combine. So a load cell of parallel beam was developed with its installing side weakened, and corresponding FEA was carried out. Then results show that these measures are not only accordant with the rule of stress concentration, but also are able to improve the sensor power to resist the base vibration. The circuit of sensor was designed so that the standard current output could be obtained and the zero point of sensor could be adjusted easily. Finally, the experiment shows that linearity of sensor is within 0. 1%, the Output of sensor is independent of the change of acting point of external force.

关 键 词：谷物质量流量传感器 测产 精确农业 联合收割机 

分 类 号：TQ172.632[化学工程—水泥工业]