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預(yù)制出筋疊合板缺陷沖擊回波頻譜特征無損識別技術(shù)研究 *

Research on Non Destructive Identification Technology of Impact Echo Spectral Characteristics of Defects in Prefabricated Reinforced Composite Plates

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胡勇軍

（廣東碧桂園職業(yè)學(xué)院，廣東清遠(yuǎn) 511510)

摘要：針對紅外成像與超聲波技術(shù)在識別出筋疊合板缺陷時(shí)存在的無損識別率低及缺陷參數(shù)識別不準(zhǔn)確等問題，提出預(yù)制出筋疊合板缺陷沖擊回波頻譜特征的無損識別技術(shù)。分析沖擊錘直徑與沖擊響應(yīng)之間的線性關(guān)系，結(jié)合疊合板的結(jié)構(gòu)參數(shù)對沖擊波信號的傳播路徑與頻率特性進(jìn)行優(yōu)化。根據(jù)優(yōu)化結(jié)果分析沖擊回波信號的時(shí)域與頻域特征，通過優(yōu)化時(shí)頻特征識別算法，有效減少了頻域中的干擾成分。利用小波技術(shù)對優(yōu)化的時(shí)頻特征進(jìn)行分解，揭示了黏結(jié)質(zhì)量對頻譜圖像及能量特征的具體影響規(guī)律。結(jié)果表明：提出的無損識別技術(shù)對于預(yù)制出筋疊合板缺陷的識別率均高于 90% , 最高可達(dá) 96. 2% , 展現(xiàn)出優(yōu)異的識別效率。研究成果可為預(yù)制出筋疊合板構(gòu)件缺陷的無損檢測提供有力的技術(shù)參考。

關(guān)鍵詞：沖擊回波法；缺陷無損識別；出筋疊合板；時(shí)頻域特征；小波分解

中圖分類號：TN92

文獻(xiàn)標(biāo)志碼：A

文章編號： 1005- 8249 (2024) 06- 0155- 07

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.028

HU Yongjun

(Guangdong Country Garden Polytechnic , Qingyuan 511510 , China)

Abstract : Aiming at the problems of low non- destructive identification rate and inaccurate identification of defect parameters in identifying defects in reinforced composite panels using infrared imaging and ultrasonic technology , a non - destructive identification technology based on the pre fabricated impact echo spectrum characteristics of reinforced composite panel defects is proposed . Analyze the linear relationship between the diameter of the impact hammer and the impact response , and optimize the propagation path and frequency characteristics of the shock wave signal by combining the structural parameters of the composite plate. Based on the optimization results , the time- domain and frequency- domain characteristics of the shock echo signal were received and analyzed in depth . By optimizing the time- frequency feature recognition algorithm , the interference components in the frequency domain were effectively reduced . By using wavelet technology to decompose the optimized time - frequency characteristics , the specific impact of bonding quality on spectral images and energy features was revealed . The results show that the proposed non- destructive identification technology has a recognition rate of over 90% for defects in prefabricated reinforced composite panels , with a maximum of 96. 2% , demonstrating excellent recognition efficiency. The research results can provide powerful technical references for non- destructive testing of defects in prefabricated reinforced composite panel components .

Keywords : impact echo method; non destructive identification of defects; reinforced laminated plate; time frequency domain characteristics; wavelet decomposition

*基金項(xiàng)目：廣東省高等職業(yè) 教育品牌專業(yè) 建設(shè) 項(xiàng) 目（粵教職函〔2018 〕 194 號）；廣東省高水平專業(yè) 群建設(shè) 項(xiàng) 目 (GSPZYQ2021008) ; 2022—2023 學(xué)年校級高等職業(yè)教育質(zhì)量工程建設(shè)項(xiàng)目 (2023JG16) 。

作者簡介：胡勇軍 (1988—) , 男，碩士，講師，研究方向：建筑工程施工與管理。

收稿日期：2023- 06- 20