The Research Of Attended Full Table Static And Dynamic Railway Weighing System

In this thesis, we have researched a full table static and dynamic railway weighing systems. First, we analyze the domestic demands. Then survey advanced weighing technology. Finally an unattended dynamic railway weighing systems has been developed to meet static and dynamic measurement need. We provide a good solution to the efficiency of the weighing problems.We analyze the factors that affect the dynamic weighing system in this paper, depending on the reason for making the appropriate processing. Factors are:air resistance, ground shape, ground geological, the level of driver, the most important is the vertical vibration. At first, the vibration has caused by the uneven surface. Secondly, the train and track coupled vibration. The whole table by the system of dynamic weighing systems analysis and research, the system can be broadly divided into two parts:hardware and software systems some parts. Some of the major hardware system for data collection, environmental monitoring and software support; software system is responsible for some of the major human-computer interface, interactive, real-time control and remote communication. Some of the major hardware system with sensors, amplifiers, AD converters, microcontroller (ARM series), radio equipment, video surveillance equipment, achieves a data acquisition and data communications. Measured physical variables corresponding analog signal modules, RF license plate number of information modules, real-time video surveillance modules, smoke signal module, flooding signal modules, access control signal module, the temperature signal modules will have added their data to the microcontroller (ARM series), the single-chip analysis and processing, then with the program-controlled host. Collected from various modules of the amount to be rectified analog signal filtering, AD converter, then amplified by the Max232 level signal value will be converted into single-chip can identify the signal level. Single-chip pre-programmed control procedures through real-time control and collect data of each module and the corresponding signal processing. ARM single-chip microcomputer and in the corresponding period sampling sampled data of timely transfer to the program host, have the more accurate analysis and calculation, the final with human-computer interface form will show the son in the operator must face. Programmed by the host cable access to Internet, operations staff can remotely through a VPN networks on the local host of program-controlled exchange of information. Different operators on the local host of the programmed operations have different permissions, permission to operate a software system to achieve the super administrators to assign, an unauthorized person or entity, not the program-controlled access to the local host. Software is written in VC++6.0, has many advantages.Through the system in the field of testing and usage, the system achieved an excellent target to meet the corresponding needs of enterprises. The system measurement accuracy of the data is worth, but also within the scope of the original theory of. Parts of the system modules are also co-operate in the expected division of labor within the normal operation for a long time unattended WIM results are provided within a range. Remote unattended monitoring, are also recorded in real-time images of the trains passing, and a RF module at the same time collect and record the license plate number of the trains. ARM-based environmental monitoring systems are functioning normally, the local time of the environmental data submitted to the program-controlled host, and a host programmed to make timely and correct and logical judgments.After a long theoretical analysis and the environment to build and test results, and ultimately draw the following conclusion:the dynamic weighing system unattended around the clock to solve the static weighing excellent bottlenecks caused the system to build a remote monitoring platform The site is also very good information to achieve real-time input function. Allows remote access and management and scheduling program-controlled local host database data and the corresponding dynamic resources to achieve remote control operation, the real reached an all-weather unattended dynamic weighing results.