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論文中文名稱:透地雷達應用於立木檢測 [以論文名稱查詢館藏系統]
論文英文名稱:Application of GPR for Living Trees Detection [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:工程學院
系所名稱:土木工程系土木與防災碩士班
畢業學年度:106
畢業學期:第二學期
出版年度:107
中文姓名:彭弘遠
英文姓名:Hong -Yuan Peng
研究生學號:105428026
學位類別:碩士
語文別:中文
口試日期:2018/07/05
論文頁數:124
指導教授中文名:陳水龍;林振榮
口試委員中文名:康裕明;蔡道賜;林振榮;陳水龍
中文關鍵詞:透地雷達非破壞性檢測立木檢測樟樹
英文關鍵詞:Ground-Penetrating Radar(GPR)Nondestructive testing(NDT)Living trees DetectionCamphor tree
論文中文摘要:非破壞性檢測技術(nondestructive techniques, NDT)用於樹木檢測技術發展愈來愈便利及具經濟性,如應力波法、超音波法等方式,各種NDT法具有優劣點,其中透地雷達NDT可進行多次量測,並對樹體幾乎不會有損傷影響,可針對樹木根部及立木樹幹進行調查,透地雷達檢測立木的主要原理為利用電磁波在不同介質傳遞時,藉由物質介電常數差異產生訊號,由多個A-scan組成的B-scan雷達圖形,經濾波處理後來進行圖形特徵判斷是否有問題。
本研究應用透地雷達檢測及評估15株樟樹立木樹幹作為案例調查範例,從歸納法及雷達波訊號的數據結果,發現當樹木內部發生偏心空洞時,所獲得透地雷達圖形特徵為似“波浪狀”,其代表意義為天線位置與空洞位置最接近時所獲得回傳訊號時間最短,當樹幹內部有不規則空洞時,雷達波訊號會出現不連續上下跳動的波形特徵。現場立木檢測時,利用金屬板產生強反射以界定訊號出樹木時間。樹幹內部狀況以應力波法檢測樹幹2D影像圖作為對照依據,以確認透地雷達應用於樟樹立木樹幹檢測是可行的。
論文英文摘要:Nondestructive techniques (NDT) which is a kind of technique applied in trees detection has been more and more convenient and economical with its development, such as stress wave method, ultrasonic wave method and so on, while all of them have their own advantages and disadvantages. GPR wherein can be applied to test for multiple times, and it won’t make any influence on the trees as well as can do the investigation for roots and tree trunks. The key principle of GPR is to generate signals by dielectric constant differences of media when the electromagnetic wave transiting in different material. Then, the B-scan GPR image made of several A-scan can help judge whether there is any problems in accordance with the graphic features after filtering processing.
This research mainly explores and evaluates 15 camphor trees with GPR, and, according to the results of inductive method and GPR wave signals, it was found that the GPR image shows “wave” when eccentric cavity taking place in the inside of trees, which represents that the antenna signal position is the shortest when the return position is the closest to the hole position. However, GPR wave signals appear to be discontinuous and fluctuate up and down when there are irregular holes. The signal time is defined by using the metal plate to generate strong reflection in the case of on-site monitoring. The internal condition of tree trunk is usually tested based on detecting 2D image of tree trunk by the stress wave method for confirming that the application of GPR is feasible to detect the trunk of camphor tree.
論文目次:摘 要 ……………………………………………………………………………………………………………………….i
Abstract ………………………………………………………………………………………………………………………ii
誌 謝 ……………………………………………………………………………………………………………………..iv
目 錄 ………………………………………………………………………………………………………………………v
圖目錄 ……………………………………………………………………………………………………………………viii
表目錄 ……………………………………………………………………………………………………………………xvi
第一章 緒論 1
1.1前言 ………………………………………………………………………………………………………1
1.2研究動機及目的 1
1.3論文架構及流程概述 2
第二章 基本原理與文獻回顧 4
2.1 透地雷達介紹 4
2.2 透地雷達基本原理 5
2.2.1 馬克斯威方程式 5
2.2.2 斯奈爾定律 7
2.3 透地雷達影響因子 8
2.3.1 介電常數與電容率 8
2.3.2導電率 9
2.3.3衰減度 9
2.3.4解析度 10
2.3.5波速計算 13
2.3.6電磁波速度估算 14
2.4 台灣樹木檢測與相關文獻 15
2.4.1 樹木構造及生長特性 15
2.4.2 樹木健全度檢查 16
2.5 GPR對樹木相關研究 21
2.5.1 GPR對材質介電常數相關研究 21
2.5.2 GPR 對活立木相關研究 23
第三章 研究方法與材料 31
3.1設備介紹 31
3.1.1使用儀器介紹 31
3.1.2 分析軟體介紹 33
3.2樹種介紹 35
3.3室內實驗-確認金屬板效果 36
第四章 現場立木檢測 41
4.1樹木編號Ac-008-038 42
4.2樹木編號291 47
4.3樹木編號Ac-008-026 52
4.4樹木編號Ac-008-015 57
4.5樹木編號Ab-008-010 62
4.6樹木編號Ac-008-021 67
4.7樹木編號Ac-008-019 72
4.8樹木編號292 77
4.9樹木編號Bb-008-039 82
4.10樹木編號Bb-008-049 88
4.11樹木編號Bb-008-048 93
4.12樹木編號Ab-008-018 98
4.13樹木編號459 103
4.14 樹木編號Ac-008-013 108
4.15樹木編號Ab-008-011 113
第五章 結論與建議 119
5.1結論 ……………………………………………………………………………………………………..119
5.2建議 ……………………………………………………………………………………………………..120
參考文獻 121
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