本文選題：四象限探測器　切入點(diǎn)：測角　出處：《物理學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：針對噪聲信號(hào)對脈沖激光四象限探測器(QPD)數(shù)字式測角算法產(chǎn)生的影響,分析了激光四象限探測器測角不確定性統(tǒng)計(jì)分布規(guī)律.建立了激光測角電路通道模型和QPD光敏面光斑模型,并根據(jù)隨機(jī)噪聲類型和理想信號(hào)類型,建立了單通道可測信號(hào)模型.考慮到QPD的對稱性,對不同的理想信號(hào)時(shí)域分布類型、光斑總峰值功率、理想信號(hào)半峰寬度和等效噪聲電壓概率密度標(biāo)準(zhǔn)差等四種變量,在θ∈[0,π/4]的范圍內(nèi)通過蒙特卡羅仿真實(shí)驗(yàn)方法計(jì)算了五個(gè)不同光斑中心的QPD測角αy值的統(tǒng)計(jì)分布規(guī)律.仿真結(jié)果表明:測角αy值的統(tǒng)計(jì)分布呈正態(tài)分布,并被四種變量影響;特別是被單象限信噪比顯著影響.光斑中心越靠近坐標(biāo)軸中心,QPD測角精度越高;光斑中心不在坐標(biāo)軸中心附近時(shí)QPD的測角αy的統(tǒng)計(jì)分布均值都小于理想測角值.
[Abstract]:In view of the influence of noise signal on the digital angle-measuring algorithm of pulsed laser four-quadrant detector, The statistical distribution law of uncertainty in angle measurement of laser four-quadrant detector is analyzed. The circuit channel model of laser angle measurement and the QPD Guang Min surface spot model are established, and according to the type of random noise and the type of ideal signal, A single channel measurable signal model is established. Considering the symmetry of QPD, four variables, such as time domain distribution type of ideal signal, total peak power of spot, half-peak width of ideal signal and probability density standard deviation of equivalent noise voltage, are considered. In the range of 胃 鈭，

本文編號(hào)：1602747