应变式负荷传感器温度补偿研究

Research on Temperature Compensation of Strain Type Load Cell

摘要:

针对应变式负荷传感器容易受环境温度变化的影响,对其受温度变化的影响机理进行了研究,建立了温度补偿数学模型;研究表明应变式负荷传感器的输出是与载荷和温度大小有关的多元曲线,即包含2条曲线:曲线1是温度不变时的“载荷-输出”,曲线2是载荷不变时的“温度-输出”;经过实验验证,在经过4次拟合补偿修正后,曲线1的输出示值误差由±0.15%减少到±0.006%,而曲线2减少到±0.009%;因此,选用曲线1拟合修正温度补偿方法,并通过实际的应用验证了该方法的有效性和可靠性。

Abstract:

In view of the influence of strain gauge load cell is easily affected by the change of environment temperature, study the mechanism of temperature change of the variable load cell, and establish the mathematical model of temperature compensation. Studies have shown that the output of the strain load cell is the multi curve which is related to the load and the temperature. The curve 1 is the "load -output" when the temperature is constant, and the curve 2 is the "temperature -output" when the load is constant. After the experimental verification, the output of the curve of the output value of the curve 1 is reduce from ±0.15% to ±0.006%, while the curve 2 is reduce to ±0.009% by 4 fitting. Therefore, select the curve 1, and through the practical application of the method to verify the validity and reliability of the method.