数字电子称毕业论文

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1、数字电子秤 I 摘要 电子秤是科学研究、工业生产和人民生活必需的计量器具，设计智能化、高精度的电子秤具有较 高的现实意义。 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。 常规的仪器表和控制装置被更先进的智能仪器所取代， 使得传统的电子 仪器在功能、精度及自动化水平方面发生巨大变化。 总的设计流程是：传感器 放大电路 量程转换电路 A/D 转换电路 LCD 显 示。 工作流程说明： 当物体放在秤盘上时， 压力施给传感器， 该传感器发生形变， 从而使阻抗发生变化， 同时使用激励电压发生变化，输出一个变化的模拟信号。该信号经放

2、大电路放大输出到模数转换器。转 换成便于处理的数字信号输出到CPU运算控制。 CPU根据键盘命令以及程序将这种结果输出到显示器。 直至显示这种结果。做为重要测量仪器，智能电子秤在各行各业开始显示其测量准确，测量速度快，易 于实时测量和监控的巨大优势，并开始逐渐取代传统的机械杠杆测量秤成为测量领域的主流产品。 关键词 计量器具，智能化，传感器，A/D 转换电路，LCD 显示 II Abstract Electronic scales is scientific research, industrial production and peoples life necessary measuring

3、 instruments, intelligent design, high precision of the electronic scales has high practical significance. The rapid development of science and technology with The Times, microelectronics and computer and other modern electronic technology achievements to traditional electronic measurement and instr

4、ument brings the huge impact and the revolutionary effects. The conventional instrument table and control device was more advanced intelligent instrument replaced, make the traditional electronic instrument in function, precision and automation level changed. Total design process is: sensor- amplifi

5、er circuit- range conversion circuit A/D converter circuit- LCD display. Working process description: when the object in ChengPan, heap pressure sensor, the sensor deform, so that the impedance change, at the same time, use inspire voltage change, a change to the output of the analog signals. This s

6、ignal amplifier output by amplifying circuit to digital converter. Conversion to facilitate the processing of digital signal output to the CPU control operation. According to the keyboard commands and CPU program will this output to the display. The results showed that the till. As the important measurement instrument, intelligent electronic scales in all walks of life began to show the measured accurately, measuring speed, easy to real time measurement and monitoring the huge advantag