基于DSP技术的密肋复合墙体空鼓声波检测  

Detection of Hollowing Sound Wave of Multi Ribbed Composite Wall Based on DSP Technology

作　　者：秦月[1] 朱磊[1] 董亮[1] QIN Yue;ZHU Lei;DONG Liang(School of Communication and Electronic Information Engineering,Qiqihar university,Qiqihar Heilongjiang 161006,China)

机构地区：[1]齐齐哈尔大学通信与电子信息工程学院,黑龙江齐齐哈尔161006

出　　处：《计算机仿真》2020年第11期412-416,共5页Computer Simulation

基　　金：黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2017152);黑龙江省高等教育教学改革项目(SJGY20190726)。

摘　　要：建筑物密肋复合墙体装饰中常使用花岗岩等材料进行装饰,经过一段时间后建筑墙面出现空鼓等现象,导致墙体外饰物坠落,造成人员伤亡等事故。为此提出基于DSP技术的密肋复合墙体空鼓声波检测方法。分析密肋复合墙体结构与主要原料,计算其弹性抗侧强度、开裂荷载以及极限荷载等参数;在DSP信号转换过程中,利用其可靠性、可编程性与可重复性等优势采集声波信号,并通过小波阈值对信号进行去噪处理,提高阈值连续性,增强信号光滑程度、减少误差;建立声波信号数学模型,根据声速、波幅异常临界值和斜率三方面判断可疑区域,完成基于DSP技术的密肋复合墙体空鼓声波检测。仿真结果表明,所提方法可以获得较为准确的声波信号,提高声波检测准确度,为墙体安全提供保障。Granite is often applied in the decoration of multi-ribbed composite walls of buildings,but the hollowing phenomena lead to falling of external decoration,personal casualty or other accidents.Therefore,a method of acoustic wave detection for the hollowing in multi-ribbed composite wall based on DSP technology was put forward.At first,the structure and main raw materials of multi-ribbed composite wall were analyzed,and its elastic lateral strength,cracking load,ultimate load and other parameters were calculated.In the process of DSP signal conversion,its advantages such as reliability,programmability and repeatability were used to collect acoustic signal.And then,the noise in signal was removed through wavelet threshold,so that the continuity of threshold was improved.Meanwhile,the smoothness of signal was enhanced and error was reduced.The mathematical model of acoustic signal was built.The suspicious regions were judged by sound speed,amplitude abnormal critical value and slope.Finally,the acoustic wave detection of hollow drum of multi-ribbed composite wall based on DSP technology was completed.Simulation results show that the proposed method can obtain more accurate acoustic signals and improve the accuracy of acoustic wave detection,which provides the security for wall.

关 键 词：密肋复合墙体 空鼓现象 声波检测 小波阈值 

分 类 号：TP317[自动化与计算机技术—计算机软件与理论]