Long-distance wireless intelligent monitoring system for state of span support

The invention discloses a long-distance wireless intelligent monitoring system for the state of a span support. The system comprises a safe net relative position monitoring module, a stay wire tension force monitoring module, a wireless area guard system, a multipath wireless communication data transmission module, a power supply module, and ground mobile terminal equipment equipped with matched software. The ground mobile terminal equipment and the above all state function modules and systems together form a WIFI local area network, and all monitored data is transmitted in a WIFI communication mode to the ground mobile terminal equipment, received and analyzed by the matched software, and then displayed by a human computer interface. The safe net relative position monitoring module obtains the shortest vertical distance between a safe net and a close object above and also the shortest horizontal distance between the close object above and the edge of the safe net by an area array CCD imaging range finding method. The system is capable of monitoring the state of a span support in a real-time, accurate and all-directional manner, and can realize early warning before accidents occur.