| 摘要: | 在快速變化的時代，人們做事總是希望能快又有效，除此之外最好還能節省開銷，透地雷達法相對於明溝開挖、地層鑽探，就明顯既快而又能節省開銷，土木工程中於城市中進行地下開挖經常會牽涉到地下管線的問題，若未能先前掌握管線正確的埋設位置，將造成日後在工程施工上的不便及風險，而若採用傳統明溝開挖的方式易對交通產生較大的影響，並不符合經濟效益。高頻透地雷達具有高解析度，訊號重複性高，且施測快速的優點。因此採用快速、經濟性高的非破壞性檢測方式配合相關資料加以判斷，已是未來發展的趨勢，由於在時間域量測分析反射訊號時，容易受到直接波相當大的影響，常導致淺層訊號易與直接波互相干擾而難以判別。本研究主要經由校內試驗及現地試驗，瞭解雷達波之訊號特性，再透過後處理的方式，改善透地雷達的訊號，以及各種濾波的方式來改善訊號。根據校內與現場的試驗分析結果顯示，後處理程式能將直接波訊號與持續存在的背景雜訊去除，對於待測物訊號的分析與判斷有更進一步的掌握。 The times in fast variety, people work to always hope fast and then valid, had better can also save expense in addition, deeply the land mine attain a method opposite open to dig in the clear ditch, ground-penetrating radar to explore, obvious since quick and again save expense, in the civil engineering in carry on in the city underground open to dig to usually concern the problem of underground pipeline, if can not control a pipeline to lay position correctly in times before, will cause to construct in the engineering in the days to come last inconvenience and risk, and if adopt traditional clear ditch to open the way for digging to bring about greater influence on transportation easily, and not agree with to match an economic benefit.High Pin ground-penetrating radar deeply the land mine attain to have a high resolution, the signal repetition is high, and tests a fast advantage. So adoption fast, the economy is high of nondestructive evaluation way concert the related data take in to judge, is already the trend of future development, in order to being easily subjected to direct wave rather great influence when the time area measurement's analysis reflect a signal, often cause shallow layer signal easily with direct wave mutual interference and hard discretion.This research mainly experiments through the school and now experiment, understand the signal characteristic of radar wave, again through behind handle of way, improve deeply land mine to attain of signal. According to the analytical result manifestation of the experimenting of school and scene, behind handle program ability will direct wave signal with keep on the existent background noise clean, having further control to the analysis that need to be measured a thing signal and the judgment. |
