"数据采集系统设计与制作：单片机技术应用及信号处理"

Abstract As various technologies in the information field continue to advance, there has been significant progress in the field of data collection. The digitization of data collection is currently the mainstream direction of social development. Data collection is utilized in various fields, such as in oil exploration and seismic data collection. With the rapid development of measurement and control technology, data collection systems based on embedded computers have already dominated the field of measurement and control. A data collection system processes, transmits, displays, and stores data collected in the field. The main function of a data collection system is to convert analog signals into digital signals for analysis, processing, storage, and display. Many companies in China have developed various products such as data collectors and cards, which have greatly facilitated the digitalization of information. The focus of this graduation thesis is the production of a data collector, which utilizes the ATMEL company's 89C51 microcontroller and AD0809 chip to collect analog voltage signals, convert them into digital signals, and transmit them to a PC for processing via serial communication. Additionally, three seven-segment LED displays are used to show the collected digital information. Keywords: microcontroller, data collection, signal processing, AD0809 chip.