測高信號 的英文怎麼說
中文拼音 [cègāoxìnháo]
測高信號
英文
altitude signal-
The cumulation of tdfcsd in a certain period eliminates the remainder noise more, and the ability of detecting signal ' s frequency is improved
通過對某段時間得到的功率譜密度累積,進一步改善snr ,提高信號頻率的檢測能力。To eliminate the serious random noises which exist in the analog sigals, the frequency spectrum of the signals are analyzed, then several digital filteration arithmetics are compared with each other and the best is selected
為消除測量信號中存在的比較嚴重的隨機干擾,在對測量信號作頻譜分析的基礎上,比較了幾種數字濾波演算法的處理效果,進一步提高了測量精度。Experiments and training can be carried out for the benefit of students on this system in the areas of signal measurement, signal transmission, data display, alarm display, modification of parameters, locking and awakening of alarm, extension alarm and simulation tests etc., which will improve the ability of students in the maintenance and management of modern ship - board automation control system ; 4
有利於對學員進行信號測量、信號傳遞、數據顯示、報警顯示、參數修改、報警閉鎖與喚醒、延伸報警以及模擬實驗等各方面的實驗和訓練,提高學員對現代化船舶自動化控制系統的維護和管理能力。Study of testing picture generator for hdtv monitor based on fpga
的高清晰度電視顯示器測試信號發生器的研究與實現The test instruments based on this method are highly precise, but costly. the author develops a grounding measurement system of substations based on the virtual instruments, which uses labview as the development software and adopts the small electric current method. the fft method is used to process the measurement data, which can decrease the measurement error
本文作者研製了基於虛擬儀器的變電站接地網接地測量系統,該系統以labview為軟體開發平臺,採用小電流測試法,並利用快速傅立葉變換方法對測試信號進行數字濾波處理,提高了該系統的信噪比。The time base drift deduced by the change of temperature is discussed particularly and the compensation method of it is analyzed. finally, we also studied frequency band extension under time base distortion condition by simulation. the results show that the compensation of time base distortion can reduce the error of signal and then increase the accuracy of frequency band extension
首先,介紹時基失真的相關概念及其對測量信號的影響;其次,對時基失真特性測量的不同方法進行了理論分析和比較,並對分析信號法進行了模擬研究;再次,對時基失真的補償方法進行分析和模擬研究;並專門對溫度變化引起的時基漂移及其補償方法進行了簡要分析;最後,對時基失真條件下的頻帶展寬技術的模擬表明時基失真的補償可以減小信號的誤差,因而提高頻帶展寬的精度。Thirdly, a modified extended chirp scaling ( ecs ) algorithm is presented, which solves the problem of producding fine focused images in the class of chirp scaling ( cs ) algorithm. lt can be used for uwb - sar imaging effectively. the phas e error produced by cs operation are analyzed. a windowed process in two dimension frequency domain before cs operation are proposed. it can improve the quality of image and widen the effectively swath and increase the peak to sidelobe ratio ( pslr )
然後針對chirpscaling ( cs )類演算法不能對參考點精確聚焦的問題,提出了一種改進的擴展cs ( ecs )演算法,實現了對uwb - sar的高效成像;分析了cs操作產生的相位誤差,提出在cs操作之前在二維頻率域對信號加窗,除有效提高信號的峰值旁瓣比( pslr )外,還可以提高圖像質量,增加有效測繪帶寬度。The double - frequency laser interferometer belongs to the heterodyne interferometer. it has been proved that this kind of interferometer possesses the advantage of having a higher transform gain, better wave - filter capacity and high spatial resolution. furthermore, this kind of interferometer can filter out background light interference and obtain a measuring signal with high signal / noise ratio
雙頻激光干涉儀是一種外差干涉儀,理論分析證明:外差干涉具有高的轉換增益、良好的濾波性能及優異的空間鑒別能力,能有效地濾除各種背景光干擾,得到信噪比很高的測量信號。The early studies are mostly focused on the method of gluing piezoceramics on structural surfaces, which has some disadvantages such as difficulties to protect the ceramics and the connection wires, bad coupling with only one surface glued on the base materials, low signal - to - noise ratio etc. these problems can be solved using the embedded piezoceramics, and furthermore, the piezoceramics can be placed in the optimal positions, especially in the optimal deepness for the piezo - actuators, according to an optimization algorithm befor e they are embedded, so the actuator effects and sensor signals are thereby enhanced
早期的研究主要集中在表面粘貼壓電片的結構,表面粘貼壓電片具有一些無法克服的缺點。本文著重進行利用埋入復合材料結構的壓電傳感器和壓電驅動器對其振動進行主動控制的相關理論和實驗研究,並介紹其相應結果。埋入型壓電材料的優點主要是能保護壓電傳感器和作動器及其連線、增強壓電材料和基體材料的耦合、優化埋入壓電陶瓷的深度和厚度可增強壓電傳感器的測量信號並提高信噪比等。Operator on prpd mode of pd signal, mode - classifying implements based on bpnn and sart are compiled. the artificial neural networks designed are applied to recognize measured signals. conclusions are made : recognition rate of bpnn is 95 %, and it is respect to magnitude of discharging signal and increases while signal magnitude increasing ; the recognition rate of sart neural network is 98 %, higher than that of bpnn, recognition rate increasing with the number of signal group
論文用設計的人工網路模式識別程序識別測量信號:以prpd信號模式的放電次數為輸入時, bp網路識別率為88 ,識別率和發生局放的強弱程度有關,局放信號越強,識別率越高;以prpd信號模式的統計運算元為輸入時, bp網路識別率為95 ;以prpd信號模式的統計運算元為輸入時, sart網路識別率為98 ,識別率隨著樣本量的增加而提高。It can realize the circuitry ' s primary protection as well. by using it ' s high - frequency transmitter together with respective peripheral process equipments, programmable testing signals are added to the transmission channel
該裝置通過高頻發訊機與相應外圍加工設備合成並傳送發端測試信號,于收訊機端接收此信號並分析傳輸通道故障信息。Since the energy of 18 - information track signal is concentrated around upper frequency and lower frequency, the frequency of the modulation signal is low, and it must have high resolution, we use zfft to detect it. as the energy of um - 71 signal is more concentrated, we use extreme value method to detect the frequency of modulation signal in frequency domain, which can satisfy the frequency resolution
針對18信息軌道信號能量集中在上、下邊頻附近且低頻信息頻率低的情況,提出了用zoom - fft ( zoom指頻率擴展或細化,簡稱zfft )演算法進行信號的局部放大檢測低頻信息,以提高信號的頻率解析度,而um - 71軌道信號能量集中在載頻附近,在頻域上採用極值法檢測低頻信息,即可滿足信號頻率解析度的要求。Moreover, the epmi which includes measuring, controlling, displaying and other function has the characteristics of multi - function, well - precision, display intuitionisticly, good performance and low cost. the epmi has formed many series of production and can adjust the coefficient so flexibly that it can fulfil different clients demand and it will have a good future
另外,本測試儀集測量、控制、顯示等功能於一體,具有測量信號多、精度高、顯示直觀、高性價比等特點,還形成了多系列產品,並能靈活進行倍率調整,可以滿足不同用戶的不同需要,具有良好的應用前景。Through research on principle and approach, this paper puts forward three new methods in power cable fault location. the first method is based on wavelet reconstruction, and the measured signal which is the difference between the faulty and sound phase current under the high voltage pulse excitation, is transformed using wavelet, and the high frequency component is reconstructed at single scale
基於小波重構的電纜故障測距方法採用脈沖電源作用下故障相與健全相的電流差作為測量信號,利用小波變換對其作多尺度分解,然後對信號在高頻下進行單支重構。The thesis firstly summarizes the current research of hdtv test pattern signal, and introduces the hdtv technology, hdtv signal design reference standards, such as smpte international standards and chinese standards for hdtv digital video signal interface of studio
論文首先對hdtv測試信號研究現狀進行了概述,並介紹了hdtv技術、 smpte國際標準及國內的演播室高清晰度電視數字視頻信號介面等hdtv信號設計參考標準。So they are able to keep synchronous and processing concurrently. besides the high resolution ratio sensor, the tiny volt class constant power and 24 bit a / d converter which equipped microprocessor are used. the high accuracy amplifier and low - pass filter circuit were designed to deal with the signals
為保證各傳感器檢測的信號具有足夠高的解析度,採用了微伏級高精度穩壓電電源和具有微處理器的24位a d轉換器ads1211 ,並設計了相應的高精度信號放大器和低通濾波器。A high - resolution method for frequency measurement is strongly introduced in the paper, which is aim at detecting the frequency of regular and binary phase coding modulated pulse signals with high frequency precision. considering the popularity of linear frequency modulated ( lfm ) signal in electronic systems, this paper then referred a radon - stft arithmetic to calculate the carry frequency of lfm signal. both of these methods referred above are implemented in the signal if detection software
針對常規脈沖調制信號和脈內二相編碼調制信號,本文提出一種高精度的數字化測頻方法,以提高信號載頻測量精度;線性調頻信號作為一種典型的非平穩信號在各種領域應用十分廣泛,但對其載頻的數字化測量比較困難,本文利用圖像處理中的radon變換與信號時頻分析中的線性變換相結合的演算法來完成對其載頻的測量。The experimental results indicate that the tangent stress keeps quite linear relation with the variation of the time in fixed transmission distance of lcr wave in elastic range. also, the experiment results prove correctness and feasibility of the methods for measuring and processing lcr wave in stress measurement. the research provides beneficial reference for the application of tangent stress measurement in elastic media from theory to practice with tdc
實驗數據表明:在試件的彈性范圍內,試件內部的切向應力與lcr波在固定傳播距離下的聲時變化有著良好的線性關系;證明了基於tdc - gp1的測試信號處理方法在用lcr波進行切向應力測量的可行性和正確性,為彈性介質中的切向應力測量從理論研究走向實踐應用提供了較高的參考價值。In order to solve the problem of measurement - control signal communication in situation, we propose a detail project that the lonworks technique is transplanted to high - voltage power line in this paper
為了解決特殊情況下的測控信號傳輸問題,本論文提出lonworks技術向高壓電力線移植的具體方案。Utilizing phase locked loop technique with complex programmable logic devices ( cpld ), a method to perform high - speed data acquisition, storage and transmission for transformer testing, which solves the problem of data acquisition for high frequency band, is proposed
摘要提出了利用鎖相環技術結合復雜可編程邏輯器件( cpld )實現對變壓器測試信號的高速採集、存儲、傳輸的方法,很好地解決了對變壓器高頻特性信號的採集。分享友人