本文關(guān)鍵詞：多普勒激光雷達(dá)單縱模穩(wěn)頻激光脈沖鑒別技術(shù)　出處：《中國科學(xué)技術(shù)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 風(fēng)場探測 激光雷達(dá) 種子注入 脈沖篩選電路 計數(shù)卡

【摘要】：精確的大氣風(fēng)場觀測對提高長期天氣預(yù)報的準(zhǔn)確性、軍事環(huán)境預(yù)報以及提高國防安全等方面具有重大意義。隨著臨近空間科學(xué)的不斷發(fā)展,對15～60km高度范圍的風(fēng)場探測顯得尤為重要。在眾多探測手段中,多普勒測風(fēng)激光雷達(dá)以其高分辨率,高精度,大探測范圍,能提供三維風(fēng)場信息的能力,引起了國內(nèi)外學(xué)者的關(guān)注,并投入了大量人力、物力進(jìn)行研究。論文在第二章介紹了種子注入式激光器的原理以及多普勒測風(fēng)激光雷達(dá)原理,進(jìn)而引出了對單縱模穩(wěn)頻激光脈沖鑒頻方法的研究。論文第三章主要是針對種子激光注入不成功時的多縱模輸出會影響測風(fēng)的準(zhǔn)確度出發(fā),設(shè)計了一塊脈沖篩選電路板,并對脈沖篩選電路的設(shè)計過程做了詳細(xì)的介紹。首先分析了出射激光脈沖在多縱模情況下對風(fēng)速測量的影響,種子注入與未注入時的風(fēng)速靈敏度相差了兩個數(shù)量級。種子未成功注入,調(diào)Q脈沖建立時間較長;種子成功注入,調(diào)Q脈沖建立時間短,而脈沖篩選電路就是通過檢測激光脈沖在時域上的變化來判斷種子注入的情況,并剔除種子未成功注入的激光脈沖。通過設(shè)計的脈沖計數(shù)卡和對應(yīng)上位機(jī)軟件對種子注入成功的脈沖個數(shù)進(jìn)行統(tǒng)計。論文在第四章中對脈沖檢測實(shí)驗(yàn)做了詳細(xì)介紹。脈沖篩選電路結(jié)合三臺種子注入式激光器進(jìn)行實(shí)驗(yàn),由于篩選電路對種子未成功注入的脈沖的剔除作用,在風(fēng)速100m/s時三臺激光器能夠有效降低測風(fēng)誤差0.29m/s、3.25m/s和0.25m/s。
[Abstract]:Atmospheric wind field observation precision to improve the accuracy of long-range weather forecasting, is of great significance in military environmental prediction and improve national security and other aspects. With the continuous development of near space science, is particularly important for the altitude of 15 ~ 60km wind field detection is. In many detection methods, Doppler lidar with high resolution. High precision, large detection range, can provide the ability of three-dimensional wind field information, attracted the attention of scholars at home and abroad, and put a lot of manpower, material resources. This paper introduces the principle of seed injection laser and Doppler lidar principle in the second chapter, which leads to the study of laser pulse frequency discrimination method single longitudinal mode frequency stabilization. The third chapter is the multi longitudinal mode output for seed laser injection is not successful will of the accuracy of the wind influence, designed a pulse Screening of circuit board, and the design process of the pulse filter circuit are described in detail. Firstly analyzes the effect in the case of multi longitudinal mode laser pulse measurement of wind velocity, wind speed and sensitivity of seed injection injection is two orders of magnitude. The seeds were not successfully injected, Q pulse setup time longer seed of success; injection, Q pulse setup time is short, and the pulse filter circuit is to judge the seed implantation by detecting changes in the time domain of the laser pulse, laser pulse and remove the seeds were not successfully injected. Through the design of pulse counting card and the corresponding software of seed injection pulse number of success statistics. In fourth chapter, the pulse detection experiments are introduced in detail. The pulse circuit with the three screening seed injection laser experiment, because the screening circuit of the seeds were not successfully injected When the pulse is eliminated, three lasers can effectively reduce the wind measurement error 0.29m/s, 3.25m/s and 0.25m/s. when the wind speed is 100m/s

【學(xué)位授予單位】：中國科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P412.25

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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