一种新的高精度电子天平温度补偿方法

双向加力式电子天平的电路结构不适于用硬件进行温度补偿,尝试利用神经网络的方法实现温度补偿.研究发现电子天平在相同质量全温度场下质量示值的漂移是一个非线性的关系,在同温度全质量场下的质量示值呈线性关系.根据这两个重要特性,利用神经网络对双向加力式电子天平进行温度补偿.结果表明,新的温度补偿方法实用性强,精度高,能有效提高电子天平计量精度.

A New Way to Compensate Temperature for High-Precision Electronic Balance

The circuit structure of a bidirectionally forced electronic balance is unsuitable for temperature compensation if using hardwares.An attempt is therefore made to apply the neural network to the balance for temperature compensation.It is found that the drift of mass indicating values changes nonlinearly if placing the balance in a full temperature field where the mass remains unchanged.On the other hand,the drift changes linearly if placing the balance in a full mass field where the temperature remains unchanged.Based on the two important characteristics,the neural network is applied to the balance for temperature compensation.The result indicates that the new way to compensate temperature is highly practical and precise to improve effectively the metering accuracy of electronic balance.