Research On Tower Crane Realtime Remote Monitoring System Based On GPRS

With the computer, communications and control development, tower crane monitoring technology has also improved. But how to improve tower crane safety factor and achieve national coverage of the tower crane monitoring technology, to make tower crane manufacturers a better master of the tower crane users running status and implementation of remote management and monitoring, research in this field is also very little. By analyzing and comparing existed tower crane monitoring system status, contraposing to the weakness and shortcoming, this paper proposes a design and implementation method of the tower crane realtime remote monitoring system based on GPRS, provides a new thought for the wide range tower crane monitoring. Thesis mainly aims at research on following aspects:1. After detailed analyzation for the tower crane monitoring system's requirements, proposed a kind of design goals and solution based on the GPRS. Used the AVR as a tower crane monitoring terminals, by sending AT commands to control GPRS module, then transfer the acquisition data to the server-side monitoring software which access to the Internet through the socket communication technology. The system includes three parts. First, apparatus design. Second, portable keyboard design and third, monitoring software on the server side.2. Based on the solution, explain the detection principles for weight, torque, angle, height, range, wind speed and then design hardware circuits on the terminal, including signal acquisition and processing circuits, LCD display circuits, relay control circuits and so on.3. Achieve software design for the tower crane monitoring terminals. Monitoring host uses dual CPU to implement data acquisition, processing, display and transmission functions. The main CPU to complete data accquition, processing and relay operation, and the slave CPU to complete the display and GPRS data transmission. Handheld keyboard fulfills the serial communication between host and portable keyboard and contructs host parameter configuration to set up data acquisition linear model.4. Server-side software was based on the Java thread pool and multi-threading technology. The software is divided into three modules, user interface module, data communication module and database management module. To use Java Swing to realize user interface, adopting thread pool, multi-threading and Java Socket technology to process a number of network connections and communication requests for the tower crane monitoring terminal which it can get better software redundancy and stability.5. Constructed linear modeling and linear fitting treatment for collected data. Correction factor will add to the monitoring terminal program to improve the accuracy and resolution for the tower crane monitoring system.On this experimental platform, user configures network communication parameters, data transmission is reliable and efficiently. The server-side monitoring software is also running smoothly. This system can reach practice's requirements which testifies the correctness and superiority of this design solution. With future development of 3G and 4G network technologies, tower crane terminal will replace the current AVR controller with ARM processor, and embed Linux and other open-source operating system to implement the tower crane image and video forms of real-time monitoring . The software can also integrate additional third-party statistics software to provide more analyses in order to real-time display collected data by graph or curve.