Study on Wireless Mesh Network Applied to Remote Monitoring and Control of Electromechanical Equipment in Fully Mechanized Coal Mining Face

In order to realize the remote control of the electromechanical equipment applied to the fully mechanized coal mining face, the paper analyzed the advan tages and disadvantages of the wire industrial ethernet, traditional wireless communication way and the new technical Zigbee and others applied to the underground mi ne. The research and development of the intrinsic safe wireless network system was provided based on the wireless Mesh technology and a wireless Mesh network was established for the electromechanical equipment of the fully mechanized coal mining face.The paper stated the design principle and operation theory of the general fra me and the nodes.The industrial trial results from No.2 Mine of Pingdingshan Coal Mining Group showed that according to the length and slope of the coal mining face, a certain amount of wireless Mesh switchboards was selected. The critical value of the received signal strength would be-85 dBm.The distance between the Mesh switch boards was adjusted and generally the disposable distance between the two Mesh switchboards would not be over 66 m.The antenna of the switchboard should be inst alled in horizontal or upward.Thus the wireless Mesh network would have excellent communication effect in the fully mechanized coal mining face and could meet the re quirements of the performances data and video transmission of the electromechanical equipment.