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基于单片机的高精度电子秤设计
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  • 高精度电子秤设计

    任歌

    淮北师范大学物理与电子信息学院 235000

    摘要 随着时代科技的迅猛发展,微电子学和计算机等现代电子技术的成就给传统的电子测量与仪器带来了巨大的冲击和革命性的影响。作为重量测量仪器,智能电子秤在各行各业开始显现其测量准确,测量速度快,易于实时测量和监控的巨大优点,并开始逐渐取代传统型的机械杠杆测量秤,成为测量领域的主流产品。在设计中主要问题和技术难度在于如何实现高精度的测量,且所测结果的重复性好。本文设计的电子秤以单片机为主要部件,用C语言进行软件设计,硬件则以应变式压力传感器为主。秤重传感器输出的电量是模拟量,数值比较小,采用HX711高精度24位,自带放大电路,设计精度达0.01g。A/D转换的结果送单片机进行数据处理包括软件滤波并显示。其数据显示部分采用LCD显示,成本低且能很好地实现所要求的功能。

    关键词 单片机;高精度;软件滤波




    The Design of The High-precision Electronic Scale

    Ren Ge

    School of Physics and Electronic Information, Huai Bei Normal University, Anhui Huaibei, 235000

    Abstract With the rapid development of technology of the times, the achievements of microelectronics and computers and other modern electronic technology play huge and revolutionary impact on the traditional electronic measuring instrument. As a weight measuring instruments, intelligent electronic scale has shown its high accuracy and speed. It has advantages in real-time measurement and monitoring, and began to gradually replace traditional mechanical scales. Intelligent electronic scale has become the mainstream products in the field of measurement.
    In this paper, the microcontroller is used as the main the component of the electronic scale, C language is utilized as the software and the strain gauge pressure sensor is used as the main hardware. Because the output is analog and the value of it is relative small, HX711 with precision is 24 bits is used as the main AD converter and amplifier, the accuracy of the scale is 0.01g. The results of AD converter are sampled by the microcontroller, and the information is filtered and displayed. The results are shown in LCD, the system has low cost and can be realized easily.

    Keywords Single-chip microcomputer;High-precision;Software filter



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