目录
3.4.3 单片机对 ADC0832 的控制原理的介绍. 21
摘 要
随着我国微型电子技术和嵌入式系统的发展，目前行业内相对比较传统的电子称重器无法满足客户的需求。为了改进传统电子秤在称重计量上得短板问题，在本次毕业设计中，将使用相对先进、快捷、智能的控制机制。该系统的控制大脑为核心部件51系列嵌入式开发系统，采用51单片机作为主要控制核心，在使用电子秤称重过程中主要通过电阻应变式压力传感器采集信号，通过数模转换将对称重电压信号进行数模转换和测量，最终将信号传送给显示器部分，蜂鸣报警等。该电子秤设计具有智能称重、数字显示、报警等功能，而且性价比高、度准确、能耗较低、制作简易、称重方便快捷等特点，给人民生活带来了很大的影响，在市场上很受欢迎。
该智能控制系统设计主要从国内外发展状况，硬件控制部件选择，根据控制原理绘制硬件电路，控制系统软件程序设计开发，软硬件联调仿真，焊接主板电路五个方面进行详细讲解。该控制系统使用AT89C51嵌入式开发系统、传感器信号采集电路、声光报警模块、电路显示部分、数据转换电路等组成智能电子秤系统。智能控制系统使用的数模转换电路是市场上专用的ADC0832芯片，将传感器采集到的模拟信号转换成单片机能够识别的数字信号，并且将数字信号在单片机上进行相应的处理，LM016L液晶显示器将将信号稳定的显示出来，并且无闪烁现象。
关键词：单片机；传感器采集；液晶屏显示；信号转换
Abstract
With the development of micro-electronic technology and embedded system in China, the traditional electronic weighers in the industry are unable to meet the needs of customers. In order to improve the shortboard problem of the traditional electronic scale in the weighing and metering, in this graduation project, will use the relatively advanced, fast, intelligent control mechanism.Control the brain of the system as the core component of 51 series embedded development system, using 51 single chip microcomputer as main control core, in the process of using electronic weighing mainly by resistance strain type pressure sensor to collect signals, weighing signal through A/D conversion to digital to analog conversion and measurement, will eventually signal transmitted to the display part, buzzer alarm, etc.The electronic scale design with intelligent weighing, digital display, alarm and other functions, but also cost-effective, accurate, low energy consumption, easy to make, weighing convenient and fast characteristics, has brought a great impact on people's life, in the market is very popular.
The system design from the hardware components selection, hardware circuit schematic drawing, system software design, hardware and software simulation, welding motherboard circuit five aspects in detail. The intelligent electronic balance system is composed of AT89C51 microcontroller, sensor acquisition circuit, sound-light alarm module, circuit display part and data conversion circuit. The digital to analog conversion circuit used by the intelligent control system is a special ADC0832 chip on the market. The analog signal collected by the sensor is converted into a digital signal that can be recognized by the MCU, and the digital signal is processed on the MCU accordingly. The LM016L LCD will display the signal stably without flicker.
Key words: SCM; Sensor acquisition; LCD display; Signal conversion
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