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以液压万能材料试验机的下横梁改造为工程实例,在梁型应变式载荷传感器弹性体结构优化的基础上,对采用30CrNiMoTi4V材料制作的弹性梁元件,分别按解析法和有限元法对其应变和强度进行计算,从理论上确定该传感器的最大应变方位及传感器的量程,两种方法的的理论计算结果误差小于6%。在液压万能材料试验机上实际应用表明:该传感器在最大量程为10 kN时可输出4×10-3ε,应变经放大器放大后可得到5 V电压输出信号,最大应力为226 MPa,能满足测试灵敏度与强度和刚度要求,传感器测试精度在1%之内。梁型载荷传感器还可应用于其他类似设备的改造,实现载荷电量输出。
Based on the structural optimization of beam-type strain-type load cell elastic body, the elastic beam element made of 30CrNiMoTi4V material was analyzed according to analytic method and finite element method And intensity calculation, the maximum strain azimuth of the sensor and the range of the sensor are theoretically determined. The error of the theoretical calculation of the two methods is less than 6%. The practical application on a hydraulic universal testing machine shows that the sensor can output 4 × 10-3ε at a maximum range of 10 kN and a strain of 5 V can be obtained by amplifying the amplifier with a maximum stress of 226 MPa to meet the test sensitivity With the strength and stiffness requirements, the sensor test accuracy is within 1%. Beam type load cell can also be applied to the transformation of other similar equipment to achieve load power output.