The Research Of The Early Antifogging And Warning System Based On GPRS For Thruway

With the rapid development of China's thruway construction in the last 10 years, the accident rate of thruway also keeping rise. Thereinto, because of China's low-east and high-west topographical features, and thruways also deployed in the southeastern coastal areas, air temperature warms up globality and climate air pollutants have increased, making the number of fog days has been going up. Especially, some agglomerate fog caused serious traffic accidents due to fog's increasing. Therefore, the establishment of the early antifogging and warning system for thruways has become an urgent task.The system integrates some technique realms, for example, the meteorology technology, embedded system technology, digital sensor technology, etc. It makes up of the antifogging and warning detection module, the GPRS wireless data transfer module and the date center, it designs the feasibility scheme and study key technologies of the early antifogging and warning system.The system bring forward using double-precision digital temperature sensor for measuring humidity for the first time. It completes the atmospheric humidity spot collection and compares it with the detection threshold, when the humidity reached the threshold into fog, a MCU startups the visibility device, so the data collection task accomplished. Then, in the MCU's control, the MC35i module transmits data to the data center through the GPRS wireless network. Ultimately, the real-time antifogging and warning system for thruways comes true.Based on the above scheme, this paper completes the program of the antifogging and warning detection module and experimentizes the GPRS long-distance wireless data transmission founding on the embedded system. Experimental results show that the antifogging and warning detection module measures data accurate, GPRS wireless data transmission is stable and reliable, scheme is feasible.Finally, the paper goes along a preliminary study about the coalescent of the early antifogging and warning system and the thruway management.