Design Of Automatic Monitoring And Early Warning System For City Road Stagnant Water Based On ARM And GPRS

At present, there is often a lot of waterlogging caused by heavy rainfall in urbanoverpasses or under-crossing tunnels, which brings great inconvenience and potentialsafety problem to pedestrians and vehicles traveling. Besides, at the present stage,each city has not yet set up a complete urban road water automatic monitoring andwarning system. Because of this, in the annual rainy season, the phenomenon thatserious waterlogging affects normal traffic often appears in many cities, which evenleads to property damages or casualties accidents. Above all, to build perfect urbanroad water automatic monitoring and warning system is imminent.This system is based on ARM (Advanced RISC Machines) Cortex-M3kernelmicroprocessor EFM32as the core processor system of monitoring site, choosinginductive digital water level sensor TC401(i.e., electronic gauge) with thecharacteristics of high measuring precision, stability and reliability, stronganti-interference ability and so on as the water level monitoring sensor of the system,and choosing stainless steel tilting JDZ05-1tipping bucket rainfall sensor as therainfall monitoring sensor of the system. The real-time information of water level andthe information of rainfall from the water level sensor and the rainfall sensor both aredelivered through CAN to the core processor of monitoring site.This system publishes the information of water and rainfall mainly through thefollowing three ways to realize. First, display data information of water level inreal-time through the LED; Second, send the water level information to relevantofficials of the road in the form of GSM short message in real-time, Third, transmitthe water level information to urban road monitoring center in GPRS wireless. At thesame time, joint broadcasting stations and FM stations to realize the release ofall-weather all-around information, and to achieve the purpose of providing real-timeand reliable rainfall information to each ordinary peop le, car drivers as well asprinciples of the urban road traffic, so as to establish the perfect urban road waterautomatic monitoring and warning system.Considering the vehicles’ different wading ability on the road, this system, inview of this, puts forward the idea of hierarchically setting the warning level. After alarge collection of maximum wading ability of various cars, according to the differentwade ability, vehicles on the road are divided into two categories--ordinary cars andSUV s, and according to the categories, the warning level of this system can bedivided into three different levels. And then, process the collected rainfall data withthe current water level information and have comparative analysis with the historicaldata. At the moment, combine with the short-term forecasting algorithm to calculatewater level information after a while so as to offer the decision makers the time of theroad traffic control and guidance, effectively avoiding congestion and all kinds oftraffic accidents caused by waterlogging.Choose Chengdu as an example. This article selected6different under-crossingtunnels as monitoring sites in Chengdu, where the city road water automatic monitoring and warning system Web GIS platforms have been set up. The real-timemonitoring, fixed-point monitoring, constant value query, scrolling monitor of urbanroad water rainfall information can be implemented on the platforms and the warninglevel parameters settings and automatic alarm and so on can also be realized.This system can effectively solve the problems of slow reaction, slow speed,lagging information etc. in the traditional manual observation about roadwaterlogging and meanwhile, according to the different requirements of water leveldata of different audience, use a way that combines a variety of ways of disseminatinginformation to realize the release of water level data information, in order to satisfythe requirements of both the ordinary road traffic participants and managers of theroad traffic. The classification settings of the warning level can also ease trafficpressure in the case of ensuring the safety of vehicles. Early prediction of water leveldata not only provides reliable data for ordinary road traffic participants, but also laysa foundation for policymakers to control the road traffic and guide vehicles in advance.Thus, it provides effect protection for public safety travel.