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With the rapid development of the railway business, a large number of air-conditioned train to participate in the operation of the compartment to improve the quality, but due to the train compartments personnel density, air conditioning system working status and other factors, make the interior environment sometimes unable to meet the requirements of passenger comfort, even to passengers and crew discomfort. Therefore, in order to improve the the train compartments environment, improve rail passenger ride comfort, increase the economic efficiency of railway passenger train compartments Environmental Monitoring System is necessary. The system uses a sensor, fieldbus and computer communication technology to achieve a single carriage environmental monitoring system for the subsystem, multi-car tandem network the whole train real-time environmental monitoring system. Subsystem as monitoring temperature, humidity, carbon oxides, nitrogen oxides, sulfur dioxide, formaldehyde and alcohol, the use of the corresponding sensor data acquisition, and handled accordingly, depending on the collection volume incoming single-chip microcontroller as the next Machine data processing unit, high-performance PC as a PC monitor node, CAN bus data transfer bus distributed data acquisition system. The whole train real-time environmental monitoring system based on the NIC communication technology and Sockets based the series network system based on client / server model design and implementation. The system bus structure, built a distributed data acquisition system based on the upper and lower body, with Windows as the operating system, VC6.0 software development platform, designed and implemented the environmental parameters inside the data acquisition and processing, display and alarm , recorded with the query, report printing, real-time curve drawing and other functions; communication is established between the cars, initializes the node, the node state recognition, the target node data monitoring and other functions. System through the inside line monitoring of environmental parameters to achieve the intended purpose, the rapid alert compartment environmental hazards, and to take effective measures to control. System to develop standards for the environmental sector to provide technical support to improve the the car travel environment, improve the quality of rail services, and promote the development of the railway is meaningful. In addition, the system has a certain degree of portability and scalability, change the front-end data acquisition and processing module, you can increase the measurement parameters, and can be transferred to other areas of environmental monitoring, environmental protection, warehouses, agriculture, forestry, and industrial production while environmental monitoring further research to provide a reference.
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