Abstract: Abstract: Shearer usually operate under complicated and terrible conditions such as heavy duty,fatigue,erosion etc, Therefore,it is inevitable for the key components of these equipments to suffer faults with various modes and different severity degrees. The condition monitoring and fault diagnosis for t Shearer is closely related to a series of issues, such as the normal operation of production systems, the improvement of production efficiency, the protection of entironment, and the scientific modernization of maintenance and management, etc.. Thus, it has received intensive attention all over the world. However, the handheld shearer monitoring and fault diagnosis system is designed by single chip microcomputer and it’s memory capacity is a very small, it only can easily monitor and much harder to complexity and methodically monitoring and diagnosis. For this reason, a novel handheld monitoring and fault diagnosis system is proposed. First, the system framework was designed and build a handware platform base on PDA to monitor data , CF data acquisition card was used to collect vibration signal. Then reasonable data collecting and browsing information flow in PDA monitoring module was respectively introduced in this paper. at last ,a key techniques,dynamic link library in monitoring module base on PDA was deeply studied and using DLL technology to achieve information interaction between the different platforms.

Key words: Shearer, fault diagnosis, Portable