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研究生:吳德彥
研究生(外文):Te-Yen Wu
論文名稱:反射波走時法應用於混凝土版厚度量測自動化軟體開發
論文名稱(外文):Development of the Automatic Software for Thickness Measurement of Concrete Plates with the Time-of-Flight Reflection Technique
指導教授:林宜清林宜清引用關係
指導教授(外文):Yi-Ching Lin
學位類別:碩士
校院名稱:國立中興大學
系所名稱:土木工程學系所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
畢業學年度:97
語文別:中文
論文頁數:112
中文關鍵詞:反射反射波反射波走時法混凝土厚度混凝土厚度量測
外文關鍵詞:Time-of-Flight ReflectionTime-of-Flight Reflection TechniqueConcrete PlateThickness Measurement of Concrete PlateThickness MeasurementReflection
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本論文主要目的乃應用反射波走時法開發出一套有效率且可自動化計算之混凝土版厚度檢測軟體,此法乃利用頻率及遠距離反射波(方法一)、近距離及遠距離反射波(方法二)兩種方法推算混凝土版厚度,不但可以解決ASTM C1383檢測程序中,以混凝土表面P波波速代表內部P波波速,對混凝土表面弱面版厚檢測結果所產生之明顯誤差問題,而且亦可解除版厚頻率因斷面邊界影響,對斷面厚度量測之限制,此法是以當敲擊源與接收器配置距離達2.43倍版厚時,遠距離版底反射P波訊號得以判讀;並利用遠距離版底反射P波波到時間及所量測版厚頻率或近距離反射波到時間,可同時計算求得版結構厚度與混凝土版內部P波波速。
為了精確、有效率地檢測混凝土版狀結構厚度,本研究開發出適合32位元操作系統(Windows XP或Vista)之(C1383-Modified,FF Plate Thickness Test Method) (方法一)及(C1383-Modified ,NF Plate Thickness Test Method) (方法二)兩套程式,兩程式外觀皆為圖形化之使用者介面,而近距離及遠距離反射波到時間點,須由量測者於程式面版上之波形顯示器調整游標(Cursor)微調鈕,並利用近距離及遠距離反射波到時間判斷準則找出波到時間點,程式即可自動計算出內部P波波速及混凝土版厚度,為了驗證新開發之版厚檢測程式於實際應用上之可行性,本研究灌製混凝土版試體,並利用此兩程式去量測已知厚度之混凝土版試體,比較兩種方法檢測版厚結果之差異。結果顯示,利用(方法一)(方法二)所開發之版厚檢測程式在混凝土版厚度量測應用上可行,應可達到實用之目的。
The purpose of this thesis is to develop computational software for automatic and efficient measurement of the thickness of plate-like concrete elements based on Time-of-Flight Reflection Techniques. Two measurement methods are used. The first one is called the frequency and far distance reflection wave method (Method one), and, the second one is called the near and far distance reflection wave method (Method two). The techniques adopted in this thesis can eliminate the errors caused by using surface P-wave velocity instead of internal P-wave’s during the measured procedure of ASTM C1383. In addition, Method two is able to break the limitation of frequency-based measurement on the lateral dimension of plate-like concrete elements. This technique assumes that the bottom reflection of the P-wave can be interpreted when the disposition between impact source and receiver reaches the thickness about 2.43 times. By using the travel time of the P-wave propagating from the impact point through the bottom reflection to the receiver at a point far away from impact and the thickness frequency of the plate or the travel time of the P-wave propagation following the near distance reflection path, the thickness of the plate and the velocity of internal P-wave can be obtained simultaneously.
For the precision and efficiency on measurement of concrete thickness, this thesis develops two programs which are presented by graphic user interface for 32 bits operating systems such as Windows XP and Vista: C1383-Modified, FF Plate Thickness Test Method (Method one), C1383-Modified, NF Plate Thickness Test Method (Method two). In order to identify the correct arrival time of the reflected P-wave, the user must adjust cursor trimming bottom on the operational panel of the waveform window. The software can compute the velocity of the internal P-wave velocity and concrete thickness. For verification, the experimental studies are performed on two concrete specimens with known thickness. Experimental results show that the software based on Method one and two are positive, operative, and effective; in other words, it is practical and workable software that can be applied in the application of the thickness measurement of plate-like concrete structures.
總目錄

摘要 I
總目錄 III
本文目錄 III
表目錄 V
圖目錄 VI


本文目錄

第一章 緒論 1
第二章 文獻回顧及研究動機 3
2-1 敲擊源與應力波動 3
2-2 應力波反射行為 5
2-2-1無反射邊界行為 5
2-2-2半無限體介面應力波反射行為 6
2-2-3 版狀結構物應力波反射行為 7
2-3 混凝土版狀結構厚度之檢測技術 9
2-3-1敲擊回音法 10
2-3-2 ASTM C1383 ……………………………………………………13
2-4研究動機 14
第三章 檢測原理及儀器設備 16
3-1反射波走時法 16
3-1-1版厚頻率及遠距離反射推算厚度(方法一)試驗方法 16
3-1-2近距離及遠距離反射推算厚度(方法二)試驗方法 18
3-2 儀器設備 19
第四章 反射波走時法版厚量測自動化程式開發 22
4-1概述 22
4-2程式架構 22
4-3計算方法 22
4-3-1版厚頻率及遠距離反射推算厚度(方法一) 22
4-3-2近距離及遠距離反射推算厚度(方法二) 23
4-4畫面規劃介紹 23
4-4-1 (方法一) 頻率_遠距離反射波走時法檢測程式 ……………23【C1383-Modified, FF Plate Thickness Test Method模組】
4-4-2 (方法二)近距離_遠距離反射波走時法檢測程式25
【C1383-Modified,NF Plate Thickness Test Method模組】
第五章 試體規劃及版厚量測 27
5-1試體製作與規劃 27
5-1-1試體製作 27
5-1-2測點規劃與儀器配置 27
5-2試驗步驟 28
5-2-1方法一 28
5-2-2方法二 29
5-3版底反射波波到達判斷準則…………………………………… 29
5-3-1敲擊源大小與近距離波形關係……………………………… 29
5-3-2 近距離反射波到達之判讀準則………………………………30
5-3-3敲擊源大小與遠距離波形關係……………………………… 30
5-3-4 遠距離反射波到達之判讀準則………………………………30
5-4 不同敲擊源大小對版厚頻率影響 ………………………………31
第六章 版厚檢測結果分析與討論 32
6-1利用頻率與遠距離走時法量測厚度 32
6-1-1試體甲量測結果 32
6-1-2試體乙量測結果 33
6-2利用近距離與遠距離走時法量測厚度 34
6-2-1試體甲量測結果 34
6-2-2試體乙量測結果 35
6-3綜合討論 36
第七章 結論與建議 39
參考文獻 40





表目錄
表6-1 試體甲之頻率_遠距離反射波走時法檢測結果 45
表6-2 試體乙【測點規劃一】之頻率_遠距離反射波走時法檢測結果 45
表6-3 試體乙【測點規劃二】之頻率_遠距離反射波走時法檢測結果 46
表6-4 試體甲之近距離_遠距離反射波走時法檢測結果 46
表6-5 試體乙之近距離_遠距離反射波走時法檢測結果 47
表6-6 試體甲頻率_遠距離及近距離_遠距離反射波走時法量測結果
比較 47
表6-7 試體乙頻率_遠距離【測點規劃一】及近距離_遠距離反射波走時法量測結果比較 48
表6-8 試體乙頻率_遠距離走時法【測點規劃一】及【測點規劃二】
版厚頻率量測結果比較 48
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