The technique of Controller Area Network applied in long-distance improved methane metrical system

Based on the widely used RS-485 communications net of mine's methame metrical system , the system's communication net was changed to CAN net. It is advantageous for control center to keep fluent communication with far excavate coal spot; it enhances the safety factor and solves the problem of telecommunication. The cost of system is low and the quondam communications cable can be used.