General structure of remote data acquisition and t

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Overall structure and principle of multi-functional construction machinery remote data acquisition and transmission terminal

with the improvement of the complexity of construction machinery and the development of diversified construction environment, in order to better improve the efficiency and safety of engineering construction, users have higher and higher requirements for the degree of intelligence of construction machinery. Field data acquisition and remote monitoring of construction machinery, as an important part of intelligent construction machinery, are also constantly upgraded and changed with the development of electronic information technology.. For example, the CPU module has experienced 8051 general single chip microcomputer, ksp430 special single chip microcomputer and ARM embedded controller; The remote data transmission module transmits the initial OSM short message and GPRS (General Packet Radio Service) wireless data to the latest 30 (third generation mobile communication system) wireless video transmission; Equipment positioning ranges from simple GPS (global satellite positioning technology) to GIS (Geographic Information System) and webois remote visual positioning

in this paper, a multi-functional data acquisition and transmission terminal based on arm/DSP core CPU is designed in combination with the current 3G mobile 2, the friction force generated by the movement of the push rod toothed rod and the gear or toothed rod on the roller: the rapid development of the push rod long-range communication network technology and the actual needs of the rapid development of on-site video monitoring. The terminal supports three-level wireless communication platforms: GSM SMS reminder, GPRS wireless data transmission and 3G high-speed wireless video image transmission, It is used for remote video monitoring and data transmission, provides can bus manual level adjustment experiment space to connect u, has strong data collection and processing capacity, and supports GPS to provide dynamic position information of construction machinery, which can well meet the multi-functional and multi-level requirements of the rapid development of intelligent construction machinery

1 system scenario

the data acquisition and transmission terminal is the on-board unit in the wireless monitoring system of construction machinery (Figure 1), and is also the most important part in the whole network system. Its main function is to collect various on-site data during the operation of construction machinery, including GPS positioning information and various operating status information, such as the inclination, speed, temperature of mechanical equipment, engine system, hydraulic drive system The status information of the chassis system is sent to the remote monitoring center through GSM/GPRS/3G three-level wireless communication. At the same time, it receives the packet and downlink of the control command information of the monitoring center, and completes the corresponding settings and operations according to the instructions

the most important feature of this multi-functional data acquisition and transmission terminal is that it is highly intelligent and modular. It provides a variety of wireless data transmission functions with different rates and can bus connection to u. this enables users to freely select peripheral modules and expand applications according to their needs. At the same time, it is also convenient for later maintenance, upgrading and updating of products

2 working principle

the multi-functional data acquisition and transmission terminal on construction machinery mainly collects various signal parameters collected by scattered data acquisition unit modules on construction machinery through CAN bus communication, and then transmits them to the remote monitoring service center after preliminary filtering and other processing. After analyzing and processing the collected field data, the remote monitoring service makes decisions and sends remote monitoring instructions to the data terminal through GSM/GPRS/3G wireless communication. The field data also includes GPS global positioning data, which enables the monitoring center to realize visual terminal data monitoring in combination with WebGIS

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