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系統識別號 U0026-0810201915113800
論文名稱(中文) 結合LoRa的移動式裝置傳輸機制設計與實作
論文名稱(英文) Design and Implementation of a Mobile Device Transmission Mechanism with LoRa
校院名稱 成功大學
系所名稱(中) 工程科學系
系所名稱(英) Department of Engineering Science
學年度 108
學期 1
出版年 108
研究生(中文) 王文俊
研究生(英文) WEN-CHUN WANG
學號 N96064167
學位類別 碩士
語文別 中文
論文頁數 62頁
口試委員 指導教授-黃悅民
口試委員-張傳育
口試委員-張傳旺
口試委員-黃顯詔
口試委員-陳靜茹
中文關鍵字 LoRa  IoT  RTK  measurement  transmission 
英文關鍵字 LoRa  IoT  RTK  measurement  transmission 
學科別分類
中文摘要 無線通訊技術隨著物聯網IOT的興起發展,近距離的無線通訊技術如 Zigbee、BLE、NFC 已發展成熟,但這些技術的傳輸距離皆在10公尺左右,故若需要進行遠距離傳輸時有諸多限制,LoRa ( Long Range )結合了長距離、低功耗等特點,讓使用者在使用IOT設備上進行長距離通訊傳輸上又多了一個選擇,也因其長距離特點,在使用情境上很適合應用在湖泊、海洋等幅員遼闊的場域,故本文將探討跨海遠距離無線傳輸上各參數設置對其接收率以及錯誤率的影響,傳送經RTK修正後的GPS脂數值,得到各個距離間的參數結果,分析在不同距離下不同參數傳輸之數據,選用出在各個距離下最節省功耗且封包正確率較高之結果,以及實作出一種搭載LoRa的移動式裝置,此裝置可依照不同距離、傳輸成功率、調整最適合的參數,達到最有效益的傳輸方式。
為實現上述方法,本論文以raspberry pi3結合RTK模組以及LoRa進行實作,傳送端數據將測得的RTK數值經過加密運算後,再經由LoRa傳輸至接收端對封包進行解密運算,最後儲存封包的雜訊比(SNR)、已知發射功率(RSSI)、封包經緯高度數值、傳送所消耗時間、封包正確數量以及封包錯誤數量等數據儲存到資料庫當中。實驗分別以5km、7km、10km定點做不同參數之實測,再依照測得知結果,實作出一套可以隨距離、傳輸成功率進行傳輸參數更改的移動式裝置,並在空曠的場域進行驗證,以達到在裝置移動的過程中最節省功耗之機制。
英文摘要 Close-range wireless communication technologies such as Zigbee, BLE, and NFC have matured, but the transmission distance of these technologies is about 10 meters, so there are many restrictions when the long-distance transmission is required. LoRa (Long Range) combines long-range, low-power consumption, etc., allowing users to have an additional choice for long-distance communication over IOT devices. It is also suitable for applications in terms of usage due to its long-range characteristics.
Therefore, this paper will explore the effects of various parameter settings on the long-distance wireless transmission across the sea on its receiving rate and error rate, transmit the GPS grease value corrected by RTK, obtain the parameter results between the various distances, and analyze the transmission of different parameters at different intervals. The data select the most power-saving and high packet correct rate at each range and realizes a mobile device equipped with LoRa. The device can adjust the most suitable parameters according to different distances, transmission success rates, Achieve the most efficient transmission method.
論文目次 摘要 I
Extended Abstract II
誌謝 IX
目錄 X
表目錄 XIII
圖目錄 XIV
第一章、緒論 1
1-1研究動機與背景 1
1-2研究目的 2
1-3章節編排 2
第二章、文獻探討 4
2-1 低功率廣域網路傳輸技術 4
2-1-1 Sigfox 4
2-1-2 RPMA 5
2-1-3 HaLow 6
2-1-4 NB-IoT 6
2-1-5 LoRa 7
2-2 應用探討 9
第三章、軟硬體系統平台介紹 11
3-1 資料蒐集及控制平台介紹 11
3-1-1 Raspberry pi 3 b+ 11
3-1-2 RTK-GPS 13
3-2 LoRaWAN 14
3-2-1 LoRa常用指標介紹 15
3-2-2 Grove_LoRa_Radio 16
第四章、系統設計與實作 18
4-1系統架構及運作流程 18
4-2傳輸測試方法 21
4-2-1 RTK-GPS誤差做法 21
4-2-2 Lora誤差精度量測 24
4-3傳輸測試流程 24
4-3-1 RTK模組測試流程 24
4-3-2 Lora測試流程 26
4-3-3 Lora移動式裝置測試流程 29
4-4 Lora最遠傳輸距離估算 30
第五章、實驗與結果分析 33
5-1 靜態實驗與結果分析-RTK 33
5-2 靜態實驗與結果分析-LoRa 33
5-2-1 1km LoRa參數比較 33
5-2-2 3km LoRa參數比較 38
5-2-3 5km LoRa參數比較 42
5-2-4 7km LoRa參數比較 46
5-2-5 10km LoRa參數比較 50
5-2-6 LoRa參數CR與封包正確率關係 52
5-3 海洋浮標動態測試 53
5-4 LoRa移動式裝置結果分析 55
第六章、結論與未來展望 58
6-1 結論 58
6-2 未來展望 59
參考文獻 60
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[22]Signal-to-noise ratio, https://en.wikipedia.org/wiki/Signal-to-noise_ratio
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