Wake-up timer and binary exponential backoff for ZigBee-based wireless sensor network for flexible movement control system of a self-lifting scaffold

摘要: Synchronous movement of attached self-lifting scaffolds is traditionally monitored with wired sensors in high-rise building construction, which limits their flexibility movements. A ZigBee-based wireless sensor system has been suggested this article to prove the effectiveness networks actual implementation. Two optoelectronic are integrated into a ZigBee node for measuring displacement scaffolds. The proposed network combines an end device and coordinator allow easy replacement as compared network. wake-up timer algorithm reduce transmitting power during continuous data communication Furthermore, variant binary exponential backoff transmission loss avoidance proposed. reduces packet collisions simultaneous access by increasing randomizing moments at nodes ...