Causes and solutions for the hysteresis of double shear beam load cells
Release time:
2014-05-31
For most double shear beam load cells, the cause of the hysteresis is multifaceted. In addition to the lag of various raw materials and adhesives, and the local plastic deformation of the elastomer, the sliding of the contact surface between the elastomer of the load cell and other components is also a factor that can not be ignored.
The hysteresis of the load cell means that when the load is loaded from the zero point in a monotonically increasing manner and when the load is unloaded in a monotonically decreasing manner from the rated load, the output value of the sensor has a difference under the same load value. Hysteresis is usually expressed as a percentage of the difference in the full-scale output of the shear beam sensor.
The double shear beam load cell uses a bolt link between the elastomer and the base. During the loading and unloading process, the contact surface between the elastomer and the base slides, which will cause the sensor to lag. The mechanism by which the contact surface between the elastomer and the base slides causes hysteresis, the friction coefficient of the contact surface, and the relationship between the structural parameters of the elastomer and the hysteresis are studied separately.
