I基于 51 单片机的压力检测系统设计摘 要：本设计借助压力传感器将压力信号转换成电信号，经过信号放大，使用高精度 A/D 转换器件，将模拟信号转换成数字信号，再经单片机运算处理转换成 LCD 液晶可 以识别的信息，最后显示输出。初始化后可以重设阈值，系统能够实现手动存储八个以 内的数据，并可以查询历史记录，对存储的数据进行统计分析，并且在实时压力检测的 过程中，预警电路一直监视系统的运行。本设计根据压力传感器零点补偿与非线性补偿原理，设计出了测量压力传感器的硬 件电路。采用单片机设计实现，具有精度高、功能强等特点。但是由于自身的稳定性其 测量结果仍存在误差。本课题设计的压力检测系统具有压力测量、超重报警、压力存储 及历史数据查阅和压力值数据的统计分析。该系统的压力检测范围为 0-10Kg，测量精 度可以达到 10g，具有高精度，低成本，易携带的特点。采用 LCD12864 液晶显示测量 结果，比传统压力检测系统的精确度更高和直观性更好。另外，该系统电路简单，成本 低，使用寿命长，应用范围广等优点。关键词：压力传感器；A/D 转换器；LCD128642Design of pressure detection system based on MCU 51Abstract：Using pressure sensor converts the pressure signal into electrical signal, after amplification, using high precision A/D conversion device that converts analog signals into digital signals in this design, then through single chip microcomputer processing into the information that LCD can identify, at last displaying and outputting information. After initialization the system can reset the threshold, achieve storing within eight data manually, and can query the history records, the statistic analysis the stored data and in the process of real-time pressure detection, early warning circuit has been monitoring the operation of the system.This paper according to the principle of zero compensation and nonlinear compensation for pressure sensor, designing measuring pressure sensor hardware. Single-chip implementation has the characteristics of high precision, strong functio...
