Research On New Shear Sensor Used In Rail-weighbridge Measurement And Application

With the rapid development of China's economy, the safety of energy, mineral, industrial raw material transportation and it's stability of quality and quantity is in a strategic position. An adequate supply of energy and material is not only to guarantee the smooth development of national economy, but also prevent from state property loss. Especially in railway transport, which takes 80 per cent of the total traffic volume, so research on a dynamic rail weighing system with higher accuracy, a good stability, strong anti-interference ability will have far-reaching significance to the development of rail transportation. In order to resolve the mine underground rail transport high-precision measurement problems, this paper puts forward a new kind of shear sensor Rail-weighbridge measuring system. This paper, focus on Rail-Weighbridge measurement demand research scheme of the selected, working principle, the test project design analysis of finite element numerical simulation, the aspects Rail-Weighbridge measurement in new shear sensors used in, mainly engaged in the following job:The first chapter analyses present situation of measurement of mines, and combining the current Rail-Weighbridge measurement of new developments in technology, We put forward new shear sensors for the idea of Rail-Weighbridge measurement of mines. Based on this, we bring up the plan of twice double-axis measurement and make a specific design, calculation and experimental verification work.The second chapter makes a comparative analysis of pit-type normal stress, bending moment type, however, owing to its easy installation, high precision, adaptability, immunity, not-for-track model shear type become a subject of the final plan. Then though the analysis the mechanical characteristics of the beam cross-section derivation, make a conclusion that the Strain gauge wire should be to the horizontal was±45°angle making the Output signal the biggest variable. At last, it makes an instruction of the program in some aspects such as measurement principles, hardware installation and so on.The third chapter makes a test of shear sensor of the sensor, which measuring accuracy is higher than similar sensors. Then make an analysis on elastic material of the sensor, the sensor installation error and installed elastic to their influence output signal of sensor and gives a response measuresThe forth chapter used finite element method analyzes model of shear sensors, using its APDL to establish a precise cross-section of rail, then according to the depth and unit types principles as well as considering the actual conditions to determine the sleeper bound form. Making a conclusion that location of the sensor mounting holes is 263.163mm closest and 789.489mm farthest. This field installation of shear sensors will be made theoretical guidance.The fifth chapter takes the TARGE170 and CONTA174 as elements for the shear sensor analysis to simulate the interference fit installation with ANSYS. By analyzing the XY shear stress contours are the sensor chip area is 2R/3 range (R is the radius of chip area). This conclusion can be used to optimum design of shear sensor size.