庄严+王凌云+张国玉+王醒华
摘 要:汽车轮胎压力监测系统(TPMS)是行车安全的保障。文章研究了直接式胎温胎压监测系统的结构和工作原理,采用英飞凌SP370传感模块和TDA5235RF接收芯片设计了一种直接式汽车胎温胎压监测系统。重点解决了轮胎的压力、温度数据实时监测及发射器与接收器距離远,接收信号不可靠等问题。所设计的系统体积小、功耗低,在每天行车15小时的情况下,模块使用周期在五年以上。且数据采集发射模块的温度压力测量精度高,可以确保传输数据的准确性,并能在胎压过高、过低或温度过高时报警。进而达到行车安全、节省油耗的作用。
关键词:轮胎压力;SP370;轮胎压力检测系统;TDA5235
中图分类号:U463.341 文献标志码:A 文章编号:2095-2945(2017)24-0094-03
Abstract: Automobile tire pressure monitoring system(TPMS) is the guarantee of driving safety. This paper studies the structure and working principle of Pressure-Sensor Based TPMS, adopting Infineon SP370 sensor module and TDA5235RF receiver chip to design a Pressure-Sensor Based TPMS. Focus on solving the tire pressure, tire temperature data real-time monitoring, transmitter is far away from receiver, received signal is not reliable and so on. The designed system is small in size and low in power consumption, In the case of 15 hours driving a day, the module usage cycle is more than five years. And that the temperature and pressure measurement accuracy of data acquisition and transmission module not less than ±2%FS, ensuring the accuracy of data transmission, and when the tire pressure is too high, too low or the tire temperature is too high, the system alarming. Thus, achieving the effectiveness of driving safety, saving fuel consumption.
Keywords: tire pressure;SP370;TPMS;TDA5235
1 概述
汽车自诞生以来,已经走过了一个世纪,一直在人们的生活中扮演着不可或缺的角色。当人们对汽车愈发依赖时,由汽车引发的交通事故也令人们惋惜。其中,由轮胎异常引起的事故在所有的事故中所占比例最大,后果最为严重,人们对轮胎问题的关注度也越来越高,汽车胎温胎压监测系统应际而生。汽车胎温胎压监测系统(Tire Pressure Monitoring System,TPMS)是一种基于无线传输技术,通过安置在轮胎内部的高灵敏度的集成传感器,对轮胎的压力、温度等数据实时传递,使驾驶员可以随时了解轮胎状态的监测系统,是行车安全的保障。
2 直接式TPMS系统硬件设计
胎压测量发射模块安放在每个车轮的轮毂上,工作条件恶劣。要求测量模块具有宽温、抗干扰能力强、测量精度高、发射稳定性好、体积小等特点。……