Abstract
The so-called Internet of Things (IoT) has attracted increasing attention in the field of computer and information science. In this paper, a specific application of IoT, named Safety Management System for Tower Crane Groups (SMS-TC), is proposed for use in the construction industry field. The operating status of each tower crane was detected by a set of customized sensors, including horizontal and vertical position sensors for the trolley, angle sensors for the jib and load, tilt and wind speed sensors for the tower body. The sensor data is collected and processed by the Tower Crane Safety Terminal Equipment (TC-STE) installed in the driver's operating room. Wireless communication between each TC-STE and the Local Monitoring Terminal (LMT) at the ground worksite were fulfilled through a Zigbee wireless network. LMT can share the status information of the whole group with each TC-STE, while the LMT records the real-time data and reports it to the Remote Supervision Platform (RSP) through General Packet Radio Service (GPRS). Based on the global status data of the whole group, an anti-collision algorithm was executed in each TC-STE to ensure the safety of each tower crane during construction. Remote supervision can be fulfilled using our client software installed on a personal computer (PC) or smartphone. SMS-TC could be considered as a promising practical application that combines a Wireless Sensor Network with the Internet of Things.
Highlights
In recent decades, Wireless Sensor Network (WSN) technology has attracted wide attention from academia, industry and even governments
Collision is the main risk in a tower crane group within overlapping working areas, the collision alarm is the fundamental function and service of our proposed Safety Management System for Tower Crane Groups (SMS-TC) to remind the drivers
Forbidden zone alarms arethe second most important function of SMS-TC to ensure that the jib and trolley of a tower crane cannot enter all the forbidden zones, such as buildings, roads, and so on
Summary
Wireless Sensor Network (WSN) technology has attracted wide attention from academia, industry and even governments. In the practical construction worksite, the safety issues of tower crane groups within overlapping working areas have attracted considerable attention in the field of academia and industry [18,19,20,21]. Different from single crane safety issue [24,25], the high-speed stable communication, accurate real-time signal processing and effective anti-collision algorithms are core problems dealing with the safety and collaboration issues of tower crane groups. TC-STE reports the real-time status of each tower crane to a Local Monitoring Terminal (LMT) through a wireless network.
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