针对山区公路交通的安全问题,研究一种适用于重型货车的坡道运行安全监控系统。依据确定的监控指标,选用Freescale MC9S12DG128B 单片机,并设计信号采集、信号处理、数据通信等功能模块和人机交互智能仪表,构建了重型货车坡道运行智能监控系统。装车道路试验结果表明,该系统实现了对制动器温度、制动主缸压力、制动轮缸压力、制动管路压力、制动减速度、下坡坡度等参数的实时监测,能够给驾驶人提供车速、制动踏板位移、制动踏板力、环境温度和湿度等信息,且当制动器温度过高、制动管路泄漏、制动减速度异常时,能够及时提醒驾驶人,有效提高了重型货车坡道运行的安全性。
For the safety problem of heavy duty vehicles running on rampway, a study and design of a safety monitoring system is presented. First we analyze the 923 downhill traffic accidents in Shaanxi to acquire their major causal factors, and confirm the monitor control indexes for the safety monitoring system. Then, the monitoring indicators, signal acquisition module, signal processing module, data communication module, and human-computer interaction intelligent instrument are designed and implemented based on Freescale MC9S12DG128B SCM. Finally, we conduct road experiments for the monitoring system. The results show that the monitoring system for heavy duty vehicles running on rampway could provide an effective way to monitor the security parameters of heavy duty vehicles and alarm, with intellectualization, visualization, security and stability. The safety of heavy duty vehicles when running on rampway is improved.
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