基于STC8A8K与HX711的高精度电子秤设计

Design of High Precision Electronic Scale Based on STC8A8K and HX711

设计制作以电阻应变片为称重传感器的电子称重装置,所在金属悬臂梁上黏贴应变片作为称重传感器。使用了12 V的锂电池自制充电器,称重装置使用了上电自校准功能,并使用LCD液晶屏进行响应数据的显示,在称重为2.00~500 g之间,称重误差要求小于0.50 g,具有去皮功能,去皮范围不超过50 g,并且可以设置单价(元/g),可计算物品金额并实现金额累加、报警和语音等相应功能。

An electronic weighing device with resistance strain gauges as load cells is designed and manufactured,and the strain gauges are pasted on the metal cantilever beam as the load cells.A 12 V lithium battery self-made charger is used,the weighing device uses the power-on self-calibration function,and the LCD screen is used to display the desired data.The weighing error is required to be less than 0.50 g within the weighing range of 2.00-500 g,When the weight is above 50 g,the weighing error is less than 1.00 g,with tare function,the tare range does not exceed 50 g,and the unit price(yuan/gram)can be set,the amount of items can be calculated and the amount of money can be accumulated,alarm and voice,etc.Features.