Design Of Multi-point Synchronous Acquisition System For Debris Flow Motion Model

As a geological disaster,the debris flow has brought more and more harm to humans and nature.One of the debris flow prevention measures is to build a debris flow prevention dam,so the design parameters of the dam play a vital role in practical application.The height and shape of these dams are related to the pressure generated by the mud on the slope during the impact of debris flow,and this pressure depends on the relative height of the highest point of the mud and the slope.Collecting height data during the movement of debris flow requires a multi-point synchronous data acquisition system.This paper mainly studies the design of multi-point synchronization information acquisition system based on FPGA debris flow motion model.First,in the context of data acquisition technology,the overall framework of the design is given,and the various modules of the system are analyzed to reflect the design requirements and role of each module;secondly,the hardware and software parts of the system are explained,and finally the system data Collection test.The results achieved mainly include the following aspects:(1)Establish a debris flow model,and use the laser sensor VL53L1 X to realize the height data collection experiment of 100 points in the high-speed movement debris flow model of different media during the sliding process,and propose a collection plan.(2)The hardware part of the system is designed using a modular method.In the front-end signal conditioning,attenuation circuit,filter circuit,amplifier circuit,etc.are designed.In terms of signal processing,the AD7909 module is used for cascading,and the collected data is converted from analog signals to digital signals to achieve synchronous data collection.(3)Combine FPGA and USB technology,transfer the collected data to the host computer through the CY7C68013 A interface,and use the Slave FIFO asynchronous working mode to achieve data caching.(4)Combined with the existing filtering algorithm,a new filtering algorithm suitable for this experiment is proposed to make the collected data smoother,which is helpful for the production of experimental results.(5)Under the environment of debris flow model data collection,the winform framework of the host computer is used to restore the time-domain curve of the relativedistance between the simulated debris flow and the experimental slope in chronological order,and the common mode suppression ratio for the static experimental environment Relevant index test,and compare the experimental data to draw the experimental conclusion.After the design of the multi-point synchronous data acquisition system has passed the test of the stability index of the experimental system,after multiple simulation experiments of different media mud ratios,the measured data has high accuracy and good system synchronization performance,which is available for future Need for simulation experiment research in the process of debris flow prevention.