Research On Intelligent Micro-motion Signal Acquisition Method And System Design

With the continuous advancement of urbanization,the development and utilization of underground space have gradually become the focus of urbanization work.Therefore,the research and development methods of the geological status of urban underground space have naturally become the focus of attention and a popular research direction.Conventional geophysical exploration techniques include drilling,high-density electrical method,shallow seismic reflection method,etc.However,these traditional methods have certain limitations and shortcomings in an urban environment,such as high cost,electromagnetic interference,or certain damage to the urban surface.As a new type of exploration technology,micro-motion detection technology has gradually become an important means of geological exploration.This technology extracts effective information from urban background noise,does not damage existing sites,has strong anti-interference ability,and is very suitable for the detection needs of urban underground space.High-quality data is a prerequisite for the correct inversion results of micro motion data,and for micro motion exploration operations,universal seismic data acquisition instruments are mainly used,which have high costs and redundant functions.Therefore,this article designs and develops an intelligent micro motion signal acquisition system with convenient operation,high collection efficiency,and high reliability,specifically designed for micro motion exploration data acquisition.After investigating the principles,exploration processes,and current mainstream acquisition systems of micro motion exploration technology,this article summarizes the requirements for an intelligent micro motion signal acquisition system and provides an overall design of the system framework.This system consists of three parts: an upper computer,a collector,and a cloud server.In order to solve the problems of high cable cost and difficult deployment in traditional seismic data acquisition systems,this system adopts a distributed offline collection method to collect signal data.A single upper computer controls multiple collectors,and the collectors can independently perform collection operations after assigning tasks;To improve the reliability of data transmission,a custom application layer protocol was designed based on the TCP protocol,and reliable transmission and communication between the three parties were achieved through this protocol format.The upper computer combines socket and multithreading technology to achieve communication and parallel processing of multiple collectors,improving transmission efficiency.At the same time,it implements an engineering management module,instruction interaction module,data processing and visualization module,which includes data storage,spectrum analysis,FIR filtering,and data resampling.The collector uses the STM32F429 chip as the controller,saves the collection task configuration parameters to the SD card,and cooperates with the AD7177 analog-to-digital converter and GPS module to independently complete the collection task without connection.The system has built an Alibaba Cloud lightweight application server,which is based on collections and hash tables to achieve the function of a transit station,complete remote connections,and use heartbeat packets to manage saved information to prevent a memory leak.Finally,a testing environment was established for the collection system and various functional modules were verified.The experimental results showed that each functional module of the system could operate normally,achieving stable data collection,storage,transmission,processing,and visualization.