1、 I 摘摘 要要 本设计是基于单片机的称重仪， 它的硬件电路设计包括单片机最小系统、 A/D 转换器、称重传感器、语音电路、LED 显示电路、5V 稳压电源电路等 几部分设计内容。其中压力传感器输出响应的模拟电压信号，经过模/数转 换（A/D 变换）后就得到数字量 D。 但是，数字量 D 并不是重物的实际重量 值 W，W 需要由数字量 D 在控制器内部经过一系列的运算即数据处理才 能得到。整个设计系统由 Atmel 公司生产 51 系列 89S51 单片机进行控制； 软件实现功能开机检测，主要是开机后自动逐个扫描 LED 数码管，以防止某 段数码管损坏造成视觉误差；出于人性化考虑我们还可以增加
2、语音电路，实 现自动语音播报重量。 关键词：称重仪；单片机；LED II AbstractAbstract The design is based on SCM weighing instrument, and its hardware design, including minimum system microcontroller, A / D converter, load cell, voice circuits, LED display circuit, 5V power supply circuit design content of several parts. Pressure
3、sensor output response in which the analog voltage signal, after A / D converter (A / D conversion) obtained after the digital D. However, the digital D is not the actual weight of the value of weight W, W D needed by the digital controller through a series of operations inside - the data processing
4、 to get. The design system produced 51 series You Atmel 89S51 Microcontroller control; software features Kaiji detection, mainly by-scan automatically after power LED digital tube, to prevent damage caused by certain digital visual error; for humanity we can consider increase the voice circuit, and automatic voice broadcast weight. KeywoKeywordrds: weighing instrument; SCM; LED III 目 录 摘 要 I Abstract II 目 录
