基于MSP430F149的胎压采集系统研究

Research of tire pressure collection system based on MSP430F149

针对车辆道路行驶或轮胎台架实验过程中胎压数据实时采集和保存的要求,设计了一种胎压采集系统。该系统以超低功耗单片机MSP430F149为核心微控制芯片,采用了集成压力传感器YCS-01实时感应轮胎胎压的变化,并采用高容量、低功耗存储器AT24C512C保存了实验过程中采集的大量胎压数据,然后通过USB通讯接口,将保存在存储芯片中的胎压数据中传输到PC端;在软件设计上充分利用MSP430F149的低功耗特性来降低系统的功耗,并在理论上研究和计算了系统的功耗。最后进行了实验测试。结果表明,系统实际采样值与标准值的误差在±3 k Pa范围内,能够准确地采集胎压,验证了设计方案的可行性。该系统具有电路结构简单、功耗低、性能稳定和数据存储量大的特点,能满足轮胎实验中要求连续采集胎压瞬态变化数据的场合。

Aiming at the requirement of tire pressure data collecting and preserving in the road test of vehicle or the tire test bench,a kind of tire pressure collection system was designed. The ultra low power MCU MSP430F149 was used as the core micro unit,the integrated pressure sensor YSC-01 was adopted to measure the tire pressure in system,and the large capacity memory and low power AT24C512 C was chosen for saving tire pressure data collected in the experiment,then the tire pressure data stored in the memory chip was transmitted to the PC through the USB communication interface; The low power consumption feature of MSP439F149 was made full use of to lower system powerconsumption in software design,research and calculation of system power-consumption in theory was made. Finally,experiments were carried out. The results indicate that the error between system sampling value and setting standard value is within 3 k Pa,system can accurately collect the tire pressure data,the feasibility of the design scheme is verified. The system has the characteristics of simple electronic circuit,low power consumption,stable performance and large data storage capacity,which can be applied to the collection and storage of tire pressure transient data in experiment.