基于单片机的高精度水位监控仪的设计

本文研究并设计了一种基于单片机的高精度水位监控仪，从硬件设计、软件设计与系
统抗干扰设计三个方面详细描述了整个系统。系统选用了高集成度的混合信号系统级芯片C8051F021，实现了信号的采集和处理，并且完成了AD421 与单片机的SPI 接口任务，协
调了它与AD7705 芯片和单片机共同构成的SPI 总线系统的关系。系统解决了以往的水位监控仪中存在的问题，达到了高精度水位测量仪器的各项标准。
关键字: 水位监控；单片机；模数转换；
Design of Water-level Measuring System with High Accuracy based on SoC ZHANG Yixiang (1. Shanxi Mechanical Electrical Profession Technology College 046011 2. Taiyuan University of Technology Shanxi Taiyuan 030024) Abstract: A new intelligent water-level system is developed in this paper. It described the system according to the hardware design, software design and anti-jamming design. We choose an advanced integrated SOC(System on Chip) microchip C8051F021 as the main controller; Realization of signal sampling, processing and its conversion in the MCU; Additionally, a 4~20mA current output channel to provide system check-up using AD421 .In the system, AD421，AD7705 and the microchip compose SPI bus. This water-level meter has satisfied all the request of system, settled many problems ever existed in the previous ones and attained high preciseness as a good meter.
Keywords: Water-level; SoC; A/D Convert