Under the background of special applications of wireless sensor networks（WSNs）in the perception of mine machinery and equipment health

structure of special perception networks needed in the coal production environments is studied

tree collection network model of WSNs is built

and reference broadcast synchronization（RBS）is researched under the constructed model.Aiming at large energy consumption and long convergence time problems of existing algorithm in setting up time synchronization

an improved reference broadcast synchronization（IRBS）algorithm is proposed.Simulation analysis shows that the improved algorithm can reduce energy consumption and synchronization convergence time in the synchronization process significantly.