beat frequency 【物理學】拍頻(率)。
【物理學】拍頻(率)。 “beat“ 中文翻譯： vt. (beat; beaten , 〔古語〕 bea ...“frequency“ 中文翻譯： n. 1.屢次，頻仍，頻繁。 2.(脈搏等的)次數，出現 ...“frequency beat“ 中文翻譯： 頻率差拍“axial beat frequency“ 中文翻譯： 軸向拍頻“axial mode beat frequency“ 中文翻譯： 軸模拍頻“beat frequency amplifier“ 中文翻譯： 拍頻放大器“beat frequency detector“ 中文翻譯： 拍頻檢波器，差頻檢波器“beat frequency electrotherapy unit“ 中文翻譯： 差頻電療機“beat frequency generator“ 中文翻譯： 拍頻發生器“beat frequency indication“ 中文翻譯： 差頻指示“beat frequency interference“ 中文翻譯： 拍頻干擾“beat frequency interferometry“ 中文翻譯： 拍頻干涉測“beat frequency meter“ 中文翻譯： 差頻測試計; 差頻頻率計; 拍頻測試器“beat frequency oscillation“ 中文翻譯： 拍頻振蕩“beat frequency oscillator“ 中文翻譯： 差頻振蕩器; 拍頻振蕩器“beat frequency receiver“ 中文翻譯： 拍頻接收機“beat-frequency detection“ 中文翻譯： 差拍檢波“beat-frequency interferometer“ 中文翻譯： 拍頻干涉儀“beat-frequency oscillartor“ 中文翻譯： 差頻振蕩器“beat-frequency oscillator transformet“ 中文翻譯： 拍頻振蕩變壓器“beat-frequency system“ 中文翻譯： 拍頻系統“bfi beat- frequency interferomenter“ 中文翻譯： 拍頻干涉儀“bfo beat frequency oscillator“ 中文翻譯： 拍頻振蕩器“bfo(beat frequency oscillator)“ 中文翻譯： 差頻振蕩器，拍頻振蕩器“blade-beat frequency“ 中文翻譯： 槳葉拍頻
beat generation |
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Based on the analysis of the beat frequency signal , the expression of the beat frequency phase is deduced . the expression indicates physics meanings of quantities to be detected and supplies theoretical bases for detection methods . by using two - dimensional fft , the range and velocity information of target is got out from the echo . according to the periodicity range ambiguity of symmetrical pulses in fmpcw , the processing method of sliding time window is used 通過對差頻信號進行的分析,得出了差頻相位的具體表達式,表現出了要檢測的各量的物理意義,對檢測的方法提供了理論依據。利用二維fft方法,可以有效地提取回波中目標的距離與速度信息。對于fmpcw信號由于均勻脈沖產生的周期性距離模糊的問題,采取時間波門的處理方法。 |
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By using the processing method of sliding time window , the problem of the periodicity range ambiguity is solved . meanwhile , the problem of range ambiguity which is produced because the range of target is biger than the maximum range of radar is also solved by using this method . then , the pulse width parameter which is the most important in the parameters of fmicw is analyzed . the stricter restrict is given to ensure the range spectrum has only one beat frequency after signal processing . at last this thesis introduces the different signal processing methods of fmpcw and fmicw 同時利用該方法解決了fmpcw信號的由于目標距離超過雷達的最大單值測距范圍而引起的距離模糊問題。然后對fmicw波形參數中最為重要的脈沖寬度進行了分析,給出了更為嚴格的約束條件,保證了信號處理后距離譜峰值的唯一性。最后,分別介紹了fmpcw和fmicw信號的不同處理方式,并對兩者不同的時域濾波性能進行了比較,并對二者的差異進行了分析。 |
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The methods of direct measurement with low precision such as frequency and time interval methods and the methods of indirect measurement with high precision such as beat frequency method , dual mixer time difference method and frequency difference multiplying method are supported on the platform . the fundamentals of each method are studied . the quantization error is analysed and the illustration is given for each method 該平臺支持直接頻率和時差法兩種較低精度的測量方法以及雙混頻時差法、差拍頻率法和頻差倍增法高精度的簡接測量方法，本文研究了各種測量方法的原理，對各種測量方法的量化誤差作了分析，并給出具體的實例。 |
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Such tags could emit 128 different signals in parallel , allowing the collection of data about an animal ' s breathing rate , wing - beat frequency and heartbeat ( if it were a species that actually has a beating heart ) in addition to its geographical location 佩帶器還可以發射128種不同的信號，這樣除了動物地理位置之外，還可以收集其它分門別類的數據，諸如動物的呼吸、翼擺、心跳頻率（針對有心跳頻率的動物）等等。 |
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Rotation speed of last and travel speed if vibrating - roller are adjustable as required . the beating frequency of vibrating - roller can be adjusted 鞋楦的旋轉速度與震蕩滾輪的前進速度，可配合平整之需求加以調整。 |
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Effect of beat frequency on the measured phase of laser - diode heterodyne interferometry 斜波調頻合成外差干涉相位檢測非線性分析 |
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Beat frequency indication 差頻指示 |
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Beat frequency oscillator 差頻振蕩器 |
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Bfo beat frequency oscillator 差頻振蕩器 |
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Beat frequency electrotherapy unit 差頻電療機 |