文档介绍：电子秤标准技术报告 GB机械安全机械电气设备第一部分:通用技术条件 GB/电子衡器通用技术条件. JJG555-1996非自动秤通用检定规程. JJG648-1996非连续累计自动衡器. JJG649-1990数字称重显示器. QB/T1078-XX非连续累计自动衡器(累计料斗秤) 中原衡器公司:JJG195-XX连续累计自动衡器.:JJG564-XX重力式自动装料衡器连续累计自动衡器.: 自动衡器.:无需操作者操作,能自动称量衡器:利用物体上的重力来确定质量的计量仪器. 输送机式承载器:此类皮带秤作为皮带输送机的一部分,:承载器上的托辊. 累计器:该装置通过累计显示器物料试验:采用皮带秤称量的物料,在皮带秤的使用设计报告实验名称:电子称设计院:专业:姓名:学号:实验室:实验组别:同组人员:实验时间:XX年12月02日评定成绩:审阅教师: 目录 1设计要求······················································32设计原理······················································33系统框图······················································34具体设计······················································4 称重传感器·······················································4放大电路和量程切换···············································5A/D转换··························································7显示器···························································8 5实验小结······················································9 试设计10μg~10kg电子称,数字显示,精度为%。 2设计原理数字电子称通过传感器将被测物体的重量转换成模拟的电压信号,较小的电压信号通过应用放大系统进行准确、线性的放大,以满足模数转换器对输入信号电平的要求。放大电路采用三运放数据放大器。仪表用放大器具备足够大的放大倍数、高输入电阻和高共模抑制比的特点。放大后的模拟电压信号经过模数转换电路变成数字量,7107实现。然后把数字信号输送到显示电路中去,最后由显示电路显示出测量结果,显示电路采用四块分立的七段LED显示电路进行显示。本设计中通过改变放大电路的增益,从而达到转换量程的目的。由于被测物体的重