本文選題：儀器儀表技術(shù) + 激光對(duì)中儀�。� 參考：《兵工學(xué)報(bào)》2017年10期

【摘要】：為提高自主研發(fā)的大型機(jī)組軸系激光對(duì)中儀的對(duì)中精度,減少由位置檢測單元(PSD)受雜散光干擾引起的誤差,提出一種基于互相關(guān)算法的微弱信號(hào)提取方法。建立基于互相關(guān)算法的數(shù)學(xué)模型,并設(shè)計(jì)模擬電路,實(shí)現(xiàn)了大型機(jī)組軸系激光對(duì)中儀的位置誤差補(bǔ)償;搭建實(shí)驗(yàn)測試系統(tǒng)獲取PSD坐標(biāo)數(shù)據(jù),使用二維精密微位移平臺(tái)進(jìn)行重復(fù)性實(shí)驗(yàn)驗(yàn)證,對(duì)測量數(shù)據(jù)進(jìn)行分析。實(shí)驗(yàn)結(jié)果表明,該方法可以在自然光照條件下保證設(shè)備的精度,分辨力在0.005 mm內(nèi),可以有效地提高大型機(jī)組軸系激光對(duì)中儀對(duì)外界噪聲的抗干擾性能。
[Abstract]:In order to improve the accuracy of the self-developed laser alignment instrument for shafting of large units and reduce the error caused by stray light interference in position detection unit (PSD), a method of weak signal extraction based on cross-correlation algorithm is proposed.The mathematical model based on cross-correlation algorithm is established, and the simulation circuit is designed to compensate the position error of the laser centering instrument for the shafting of a large unit, and the experimental test system is built to obtain the PSD coordinate data.The two-dimensional precision micro-displacement platform was used to verify the repeatability and the measured data were analyzed.The experimental results show that this method can ensure the accuracy of the equipment under natural illumination and the resolution is within 0.005 mm. It can effectively improve the anti-interference performance of the laser centering instrument to the external noise in the shafting of a large unit.
【作者單位】： 長春理工大學(xué)機(jī)電工程學(xué)院;
【基金】：吉林省科技發(fā)展計(jì)劃項(xiàng)目(20100365) 兵器科技研究項(xiàng)目(62201040504-A)
【分類號(hào)】：TH744.5

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