多通道超声波桩基检测仪的设计与实现

发布时间：2018-03-12 10:12

本文选题：多通道　切入点：超声波　出处：《中国科学院大学(工程管理与信息技术学院)》2013年硕士论文　论文类型：学位论文

【摘要】：随着近几年我国基础建设步伐的加快,大批铁路、高速公路、水利等工程项目短时间内在全国各地展开,新建混凝土灌注桩的数量瞬间加大；而目前主流超声波基桩检测仪一次扫描只能获得桩基一个剖面的声学参数,而每次扫描需要放探头、提升扫描、收线等必不可少的繁琐工序。因此效率更高的超声波基桩检测仪的需求变得更加迫切。本文旨在研究通过操作四只探头进行检测,以提高检测效率。本文完成的主要工作包括： (1)在充分了解技术背景和分析当前市场需求的基础上,利用分时复用的设计原理,设计出了多通道超声波桩基检测仪的基本工作流程： (2)搭建了基于ARM平台的硬件工作平台,并对该硬件平台进行了功能扩展,对Windows CE6.0系统进行了深度剪裁,设计了基于Embedded Visual C++的开发的控制程序的基本框架； (3)设计并实现了基于FPGA和Verilog HDL的通讯控制、超声波激励电路控制、放大电路控制、采样延时控制、深度信号解码以及采样电路；设计了传感器结构,并实现了实现收发兼用功能的全新前置放大电路； (4)对超声波激励、放大、采样电路以及解码程序进行了测试和分析,对论文方案的可行性进行了充分的验证。本文所设计与实现的多通道超声波桩基检测仪利用ARM低功耗平台,使用分时复用的技术,结合配有全新前置放大电路的收发兼用传感器,实现了同时获取桩基多剖面声学参数,以达到提高检测效率的目的。本文设计和实现的多通道超声波桩基检测仪己为某新型科技公司采用,其产品已经为多个甲级检测单位采用。
[Abstract]:With the acceleration of infrastructure construction in China in recent years, a large number of railway, highway, water conservancy and other engineering projects have been carried out throughout the country in a short time, and the number of newly built concrete cast-in-place piles has increased instantly. At present, the mainstream ultrasonic pile detector can only obtain the acoustic parameters of one section of the pile foundation at one time, and each scan requires the placement of a probe and the lifting of the scan. Therefore, the need for a more efficient ultrasonic pile detector becomes more urgent. The purpose of this paper is to study the operation of four probes for detection in order to improve the detection efficiency. The main work accomplished in this paper includes:. 1) on the basis of fully understanding the technical background and analyzing the current market demand, using the design principle of time-sharing reuse, the basic work flow of the multi-channel ultrasonic pile foundation detector is designed. (2) the hardware working platform based on ARM is built, and the function of the hardware platform is extended, the Windows CE6.0 system is deeply cut, and the basic frame of the control program based on Embedded Visual C is designed. The communication control based on FPGA and Verilog HDL, the control of ultrasonic excitation circuit, the control of amplifying circuit, the control of sampling delay, the decoding of depth signal and the sampling circuit are designed. A new preamplifier circuit is implemented to realize the function of both transceiver and transceiver. 4) the ultrasonic excitation, amplification, sampling circuit and decoding program are tested and analyzed, and the feasibility of the scheme is fully verified. The multi-channel ultrasonic pile foundation detector designed and implemented in this paper uses ARM low power platform, time-sharing and multiplexing technology, combined with transceiver and transceiver sensor with new preamplifier circuit. At the same time, the acoustic parameters of multi-section of pile foundation are obtained at the same time, so as to improve the detection efficiency. The multi-channel ultrasonic pile foundation detector designed and realized in this paper is adopted by a new science and technology company. Its products have been used by a number of A-class testing units.
【学位授予单位】：中国科学院大学(工程管理与信息技术学院)
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.16;TH763

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