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采用弹性梁对旧式液压万能材料试验机下横梁进行改造,为确保弹性梁传感器的灵敏度和精度,根据应用“应力集中”的设计原则,在合理选择传感器结构基础上,采用有限元法对其应变和强度进行计算,合理确定弹性梁的贴片部位,从理论上确定传感器的最大应变方位及传感器的量程。在旧式液压万能试验机上实际应用表明:被测力与输出信号保持严格的对应关系,传感器完全满足测试强度与灵敏度的要求,可实现载荷的电量输出。
In order to ensure the sensitivity and accuracy of the elastic beam sensor, a flexible beam is used to transform the lower beam of the old hydraulic universal testing machine. Based on the design principle of “stress concentration” and on the basis of rational selection of the sensor structure, finite element method Its strain and strength are calculated, and the patch position of the elastic beam is reasonably determined. The maximum strain azimuth of the sensor and the range of the sensor are theoretically determined. In the old hydraulic universal testing machine practical application shows that: the measured force and the output signal to maintain strict correspondence between the sensor fully meet the requirements of test intensity and sensitivity, load power output can be achieved.