【作者】 姚杰；

【导师】 魏福玉；

【作者基本信息】 吉林大学 ， 机械电子工程， 2005， 硕士

【摘要】 本论文通过对薄壁延伸式传感器弹性元件的分析研究,在ANSYS 下建立了弹性元件的有限元力学模型,并通过实验验证了ANSYS 建模的合理性。用逐一改变结构参数,不改变载荷的方法研究弹性体的应变输出的变化,建立了应变输出与结构参数的相应关系。并且首次将ANSYS 谐波响应分析应用到分析八角环传感器的动态特性。对照实验对模型进行了验证。对由偏载和相间干扰产生的输出误差进行了分析,并推算了标定公式。通过采用特定结构,避免了贴片区产生大的应变梯度,保证了传感器输出的线性度。并用分步优化的方法对弹性体的应变输出进行了优化,保证了传感器的三向灵敏度。更多还原

【Abstract】 The sensor technique, communicate technique and computer technique arethe three mainstay technique of modern times information industry, whichseparately make up of “sense organ”, “nerve”and “cerebra”of modern timesinformation technique system. Therefore, sensor is the chiefly parts of informationcollecting system, and the sensor technique is the important technique basis ofmodern information times.Because of its predominant ratio of price and capability as well as itsanti-jamming ability, the electric-resistance strain sensor is widely used in the fieldof mechanic measuring technique. These kinds of sensors have become themainstream of measuring force and weighing. Octagonal Ring Dynamometer isone kind of electric-resistance strain sensor, which can measure multi-axis force.Because its organization is much complicated, there was not a mature theory ofdesign method.The general characters of the sensor and elastomer component can generallybe divided into static characteristic and dynamic characteristic. The static characterof the sensor mainly includes linear degree, sensitivity, and repetitiveness.Generally,dynamic characteristic of sensor is studied by the respond to transientstate to be and one dynamic characteristic from when land and frequently landrespect of two pieces adopt there aren’t law and frequency.The elastic component is in conformity with the request of satisfying: Thestress of any part of the component must not exceed the material elastic limit, thereshould be enough strain amount in the position of pasting the strain slice, it is littlefor deformation amount to try one’s best, is it shake frequency relatively high byoneself to demand generally.Existing elastic mechanics is very difficult to this kind of irregular elasticcalculation, with the development of finite element theory, for analyse peoplecomplicated structure there is an effective tool, that is finite element analysis. Thistext analyses the elastomer by way of finite element. Use the finite element toanalyze that software ANSYS carries on elastic component analysis. To analyzingthat the part not very important has been simplified, it was the finite elementmodeling that the entity modeling method from bottom to top will be carried onthat was adopted. That use is that ANSYS parameter design languages in themodeling course --Method of APDL. A division (Fig. 1) of scheme for usingSOLID92 unit and SOLID95 is selected through several contrasted elastomermodeling. Fig 1 Load on the model, then calculate. After the solution is done, take out thestrain of sticking scene of districts, calculate three outputs of elastomer byequation(1). Compare the result of calculation with the strain got from the ? = (ε3 +ε4’ +ε5 +ε6’ ?ε5’ ?ε6 ?ε3’ ?ε4)? K ?e?10?3 1 ?EX ???EY 4 = (ε1 + ε1’ +ε2 +ε2’ ?ε7 ?ε7’ ?ε8 ?ε8’ )? K ?e?10?3 1 (1) ? 4 ? = (ε9 +ε9’ ?ε10 ?ε10’ )? K ?e?10?3 1 ??EZ 4 EZ —Voltage of output of the electric bridge (mv) K—Sensitive coefficient of strain εi—Alittlestrain(με) e—Support the voltage of the bridge (v)experiment under the same load situation, we can draw such a conclusion, that thestatic characteristic of the elastomer finite element model set up with ANSYScorresponds to reality well.Utilize the harmonic response analysis of ANSYS toiv更多还原