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The System Tower Cranes Monitoring Based on Wireless Commnication Network Technology

Author: YangYong
Tutor: YangJing
School: Xi'an University of Technology
Course: Mechanical and Electronic Engineering
Keywords: Tower crane Wireless communications Smart sensors Node Communication protocol
CLC: TP277
Type: Master's thesis
Year: 2009
Downloads: 99
Quote: 3
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Abstract


In recent years, with construction scale unceasing expansion, the safety of tower crane production is more and more received social widespread attention. The tower crane condition monitoring equipment has become the essential link in its safety production. At the same time, with the wireless communication technology’s rapid development, the short-distance, low rate, low-power wireless transmission technology has been used more and more in a variety of industrial field. This topic is based on the tower crane supervisory system of wireless network. It is through installed a number of wireless intelligent sensor nodes constitute a wireless sensor network on tower cranes to achieve crane status information monitoring. Using this application has the vital significance in the crane tower’s informationization.The thesis firstly is analyzed the working principle of tower crane, and set up crane’s wireless monitoring model. In order to ensure the effectiveness and the timeliness in the information transmission, the thesis is constructed the network topology based on Zigbee agreement point-to-point. The master node is responsible for the information collection and processing. The sub-node is designed to relay additional routing information and is responsible for crane access and control the output. On this basis, it is designed the simulation quantity intelligence node and the digital quantity intelligence node hardware circuit used the STC89C51RC monolithic integrated circuit as the processor. The wireless communications modules used 2.4GHZ XBee-PRO and achieved a variety of sensor signal pre-processing, information collection and communication functions. In the exchange information of the network, used polling method to achieve information communication between various sub-nodes and the master node. It has designed the sub-node sampling procedure, the serial port communication procedure as well as the interrupt service. Regarding the master node, it has mainly designed the serial port transmission as well as the inquiry subroutine.Considered the tower crane working conditions quite are bad, this article is specifically considered the whole issue of anti-interference in the hardware and software. In the hardware, it is considered anti-thunder, isolation and the circuit board wiring criterion. In the hardware, it is considered watchdog, software filtering measures and so on. Finally, the article has designed the circuit board to carry out a simple simulation and system debug. It has been shown the wireless network system can achieve tower information control.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Monitoring, alarm,fault diagnosis system
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