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初中物理(人教版)第一册第七章《质量和密度》的第一节《质量》中介绍:电子秤是测量物体质量的一种工具.我们认为这种说法不对,其原因是: 电子秤工作原理示意图如图所示:它是利用电阻应变式传感器即压力应变传感器(压敏元件——半导体应用之一)将它所受到的压力信号转变为电信号,经过电子线路处理后在显示器上显示出来.从以上原理来看,电子秤实际上是测量物体重力G(其底板水平),再通过G=mg计算出物体的质量m的.而在地球上不同的地方,
The first section of “Quality and Density” in Chapter 7, “Quality and Density,” of Chapter 1 of the Junior Physics (PEP) Volume I describes: Electronic scales are a tool for measuring the quality of objects and we think this is not true because: Electronic scale working principle diagram shown in the figure: It is the use of strain sensor strain sensor (pressure-sensitive element - one of the semiconductor applications) will be subjected to the pressure signal into electrical signals, after the electronic circuit processing in the Display on the display from the above principle point of view, the electronic scale is actually measuring the object gravity G (its bottom level), and then by G = mg calculate the mass of the object m and in different parts of the earth,