臺灣博碩士論文加值系統

本論文以頻率調變連續波雷達結合連續波雷達技術，研製應用於人體定位與生理訊號偵測之 24 GHz 多雷達感測系統，該系統由多個雷達模組結合而成，雷達模組包含射頻電路、基頻電路以及數位訊號處理。射頻部分利用 Infineon 公司之 BGT24LTR11N16 以及頻率合成器晶片，並以 2x2 陣列天線作為雷達收發天線。雷達收發晶片之基頻輸出訊號經由三階貝索濾波器抑制串音干擾，再經過反向放大器進行放大，並將基頻訊號進入 LinkIt7697 進行數位-類比轉換，最後透過有線的 USB 或者是無線的 Wi-Fi 協定把訊號傳送到電腦進行快速傅立葉轉換，得到頻率後再轉換成相對應之距離與生理訊號。本論文應用於人體定位與生理訊號偵測之 24 GHz 多雷達感測系統，可成功實現一維、二維的多目標人體定位。

This thesis presents a 24 GHz non-contact human location and vital-sign detection multi-radar system based on the frequency-modulated continuous wave (FMCW) and the continuous wave (CW) techniques. The system is composed of multiple 24 GHz radar modules. Each radar module includes the radio frequency circuit, baseband circuit and MCU. The portion of radio frequency circuit consists of Infineon BGT24LTR11N16 radar transceiver chip, TI frequency synthesizer, and 2x2 antenna array as transmitting and receiving antennas. The output baseband signals from radar transceiver chip pass through the Bessel high pass filter to suppress the crosstalk interference, and then amplified by inverting amplifier. After that, MCU LinkIt7697 takes in the baseband analog signals and convert to digital signals, then sends the signals through USB or Wi-Fi to computer to perform fast Fourier transform (FFT). The proposed multi-radar system has the ability to locate multiple human targets and monitor their vital sign in the indoor environment.

摘要 i
Abstract ii
目錄 iii
第一章 緒論 1
研究動機與目的 1
FMCW雷達簡介 7
章節說明 9
第二章 具鎖相迴路之24-GHz雷達模組 10
雷達電路設計 10
微帶天線設計與量測 10
雷達晶片介紹 12
LinkIt7697 晶片介紹 13
鎖相迴路設計與量測 14
鎖相迴路原理介紹 14
頻率合成器晶片介紹及設計 14
雷達模組電路設計及測試 20
基頻電路設計及量測 21
雷達模組驗證 26
雷達模組一維人體定位與生理訊號測試 30
第三章 二維人體定位與生理訊號偵測雷達模組 34
一維多目標人體定位與生理訊號偵測之機制原理 34
一維度人體定位驗證 34
一維度生理訊號偵測 36
二維多目標人體定位及生理訊號偵測 38
MQTT 原理 38
演算法介紹 39
演算法改進 41
人體定位 43
生理訊號量測 46
第四章 結論 49
參考文獻 50

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