基于CAN總線的隧道照明系統(tǒng)的研究
[Abstract]:Tunnel lighting is an important condition to ensure the safe operation of the tunnel, and its cost accounts for a large proportion in the tunnel operation. With the development of traffic facilities in the central and western regions, the number of tunnels is increasing rapidly, and unscientific tunnel lighting has become the reason for the low economic benefits of the operating units. At present, the lighting control mode used in the tunnel can not meet the needs of energy saving and consumption reduction, nor can it cope with the complex changing environment in the tunnel. By comparing the performance of several fieldbus, can bus is characterized by its simple structure, high stability, strong anti-interference ability, good expansibility and openness, and low cost. A tunnel lighting system based on CAN bus is developed in this paper, including the design of CAN bus repeater and gateway, and the design of constant current power supply for automatic dimming LED flat lamp. The system realizes the functions of tree network composed of multiple CAN buses, multi-node control, multi-channel 12-bit A / D conversion circuit, PWM variable constant voltage source, emergency power supply, lightning protection, high transmission rate and so on. This paper introduces in detail the setting of the lamp position in the tunnel, the repeater composed of C0851F040 chip with CAN bus function and the CAN controller with independent CAN controller MCP2510 with SPI, and their software communication protocol. A power supply circuit with adjustable output voltage based on Cuk circuit of switching power supply. And there are related experimental data and its analysis. Through a large number of experiments, the intelligent nodes can be controlled uniformly, and the functions of fault self-diagnosis and emergency treatment can be realized in emergency situations. It can not only meet the requirements of tunnel lighting, but also save energy effectively.
【學(xué)位授予單位】:河北工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:U453.7
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