Research On Monitor And Control Local Area Network Based On CAN-bus Technique

In today’s rapid development of network control technology, Automation technology is widely used in industry, agriculture, military affairs, scientific research, etc. M2M is the machine and the machine (Machine to Machine) in the dialogue, is to transfer data from one terminal to another terminal. Automation technology, M2M is the first step which realize ubiquitous network, the Internet of things, one of means of information, and information technology is the result of M2M implementation.With modern warfare on the improvement of weapons automation requirements and the continuous application of a variety of high-tech in military equipments, special air conditionerwhich is as temperature and humidity conditioning has become important part of supporting which protect weapon and equipment operating reliably, and also continue to adopt advanced technology to meet the requirements of the host of the environmental control. From the birth of the first domestic special air conditioning equipment to present, Air-conditioning control system experienced by strong electro-mechanical temperature control to using SCM or PLC which achieve full automatic adjustment of temperature and humidity, Single manual operation to remote computer networking control development.With gradual improvement of types of military supplies and technology content, the demand for storehouse is higher and higher. The temperature and humidity in storehouse need to be controlled. When many storerooms are controlled, if Manual control of the scene, gathering information, it will mean huge workload, and slow information feedback, even hard to know the situation real time in the storeroom. The paper is for the high reliable and private features of special AC equipment, comparing several characteristics of the remote control technology, and to air-conditioning control system of military material supply as an example, CAN-based remote network control technology is proposed in the application of special AC equipment, will be more than a dozen warehouse air-conditioning equipment connected together to form local network, Central control room can control and monitor each air conditioning equipment within the network remotely: Remote data collection, Centralized and Remote Control. All nodes within the system operating status and working conditions, such as temperature, humidity can be sent to control terminal, a panoramic view, At the same time, the total console can control multiple devices on/off and adjust parameters.The paper mainly includes:(1) Discuss the current development trend of network control technology and development status of the Internet of things.(2) For the characteristics of the remote control needs in this project, comparing several characteristics of the remote control technology, air-conditioning control local network based on CAN bus is determined(3) In the pre-project basis, on electronic control circuit board which single control air conditioner, hardware configuration controlled by CAN is selected, schematic and PCB is drawwed, and Original device is welded, finish manufacture of the circuit board.(4) Drawing flow chart according to function of each module, Working out the communication protocol of networked control of air conditioner based on CAN bus, and carry out programmer design according to the protocol.(5) Experiment is tested in Laboratory, Actual construction of connecting lines.(6) Successfully develop one system which is monitoring and controlling local network based on CAN bus technology. Monitoring and controlling temperature control equipments in storehouses are connected to become network, Central control room execute the function of remote control and monitor. When each storehouse scatters and is far away from each others, advantage of this control system is very clear. Research and promotion for this project can greatly saves manpower, material and financial resources, observably improve the automation management level of logistics.