Design Of Multi-point Pressure Test System For High-speed Synchronous Debris Bearing Wall

The debris flow bearing wall is one of the important disaster prevention measures in the geological disasters such as mudslides,and the evaluation of its structure,material,slope,thickness and other attributes has always been a problem in the study of geological hazards.Obtaining attribute data for the correct design of the debris flow bearing wall is the key to the reduction of local debris flow and other geological hazards.One of the most important parameters for evaluating the above attributes is the pressure on the debris flow bearing wall at different points in the debris flow impact process.The pressure is constantly changing according to the impact of debris flow disasters,the composition of debris flow medium,the time of the impact process,and the impact of different locations.The collection of pressure data in the above process requires the use of a modern high-speed synchronous data acquisition scheme.The research results of this paper can be used to collect synchronous pressure data from eight point pressures on a debris flow bearing wall and to preprocess the collected data.There are also certain technologies at the same time.Innovation:1.Multi-channel synchronous acquisition technology based on FPGA realizes the collection and buffering of debris flow pressure data.The hardware and software parts of the system are designed.At the same time,analog signal processing,such as amplification and filtering,is performed during the acquisition process.The need for simultaneous acquisition of multiple points of raw data in a DAQ system.2.Through the high-speed USB interface for PC communication,the communication process not only has the data with the time mark,but also added a diagnostic protocol to facilitate troubleshooting of the lower computer,the host computer using the winform framework development,mainly used to display Domain signal.3.The upper computer program integrates the functions of filtering,time domain processing,and frequency domain processing of the original data,and can preprocess the original signal to facilitate the use of the post-engineering personnel.Finally,the results of single-channel and multi-channel data acquisition are analyzed and pre-processed.It is concluded that the system designed in this paper can meet the requirements of multi-points High-speed Data Acquisition and good synchronization performance.