本文選題：LED + 視覺(jué)當(dāng)量�。� 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：在LED芯片生產(chǎn)工藝流程中,LED芯片在進(jìn)行封裝之前需要進(jìn)行光電參數(shù)測(cè)試,然后進(jìn)行分類分選,后續(xù)芯片封裝對(duì)分選后的芯片的排列精度要求很高。為了保證芯片的排列精度,在LED檢測(cè)分選一體機(jī)出廠前必須對(duì)其進(jìn)行精度標(biāo)定。然而,LED一體機(jī)精度標(biāo)定比較復(fù)雜,而且當(dāng)前的標(biāo)定效率非常低。本文通過(guò)提出LED一體機(jī)視覺(jué)標(biāo)定方法,并相應(yīng)的設(shè)計(jì)一套視覺(jué)標(biāo)定裝置對(duì)相機(jī)視覺(jué)當(dāng)量和旋轉(zhuǎn)中心及傳動(dòng)比進(jìn)行標(biāo)定,主要內(nèi)容如下:首先對(duì)一般設(shè)備機(jī)床的精度標(biāo)定方法進(jìn)行分析,并著重對(duì)機(jī)器視覺(jué)相機(jī)標(biāo)定方法的研究現(xiàn)狀進(jìn)行了介紹。針對(duì)LED一體機(jī)需要進(jìn)行標(biāo)定的幾個(gè)部分進(jìn)行了分析,并就設(shè)備視覺(jué)相關(guān)的標(biāo)定提出技術(shù)方案。建立視覺(jué)系統(tǒng)相機(jī)成像幾何模型,分析鏡頭畸變對(duì)相機(jī)標(biāo)定的影響。對(duì)視覺(jué)當(dāng)量的標(biāo)定方法進(jìn)行了介紹,并設(shè)計(jì)一套標(biāo)定裝置對(duì)其進(jìn)行標(biāo)定,實(shí)驗(yàn)對(duì)比使用標(biāo)定裝置前后的標(biāo)定效果。對(duì)偏角芯片角度校正的原理進(jìn)行分析,通過(guò)最小二乘法擬合出供給區(qū)旋轉(zhuǎn)中心坐標(biāo)。采用標(biāo)定板上圓點(diǎn)圖案對(duì)旋轉(zhuǎn)中心及傳動(dòng)比進(jìn)行標(biāo)定,并通過(guò)偏角芯片的角度校正實(shí)驗(yàn)驗(yàn)證了由視覺(jué)標(biāo)定的傳動(dòng)比機(jī)械設(shè)計(jì)的傳動(dòng)比精度更高。最后,采用標(biāo)定裝置和原標(biāo)定方法分別對(duì)視覺(jué)當(dāng)量和旋轉(zhuǎn)中心及傳動(dòng)比進(jìn)行連續(xù)標(biāo)定實(shí)驗(yàn),并將標(biāo)定結(jié)果進(jìn)行對(duì)比。實(shí)驗(yàn)結(jié)果顯示采用標(biāo)定裝置進(jìn)行視覺(jué)標(biāo)定時(shí)標(biāo)定精度更高,而且耗時(shí)也明顯短很多。
[Abstract]:In the process of LED chip production, the LED chip needs to be tested by photoelectric parameters before packaging, and then classified and sorted. The subsequent chip packaging requires high arrangement precision of the separated chip. In order to ensure the precision of chip arrangement, the LED integrated machine must be calibrated before it leaves the factory. However, the precision calibration of LED integrated machine is complicated, and the calibration efficiency is very low. In this paper, the visual calibration method of LED integrated machine is proposed, and a set of visual calibration device is designed to calibrate the camera visual equivalent, rotation center and transmission ratio. The main contents are as follows: firstly, the precision calibration method of machine tool is analyzed, and the research status of machine vision camera calibration method is introduced. This paper analyzes several parts of LED integrated machine which need to be calibrated, and puts forward the technical scheme of equipment vision related calibration. The geometric model of camera imaging in visual system is established, and the effect of lens distortion on camera calibration is analyzed. The calibration method of visual equivalent is introduced, and a set of calibration device is designed to calibrate it. The principle of angle correction is analyzed, and the rotation center coordinates of feed region are fitted by least square method. The rotation center and the transmission ratio are calibrated by using the dot pattern on the calibration board, and the accuracy of the transmission ratio designed by the vision calibration than the mechanical design is verified by the angle correction experiment of the deflection chip. Finally, the visual equivalent, the rotation center and the transmission ratio were calibrated continuously by the calibration device and the original calibration method, respectively, and the calibration results were compared. The experimental results show that the calibration accuracy is higher and the time consuming is much shorter.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TP391.41;TN312.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉文科;楊其長(zhǎng);;設(shè)施農(nóng)業(yè)照明新光源——發(fā)光二極管(LED)[J];科技導(dǎo)報(bào);2014年06期

2 王虹;蔡喜平;;基于白光LED的可見(jiàn)光通信研究進(jìn)展[J];半導(dǎo)體光電;2014年01期

3 程志;張翔;;激光干涉儀在數(shù)控機(jī)床維修中的應(yīng)用研究[J];航空制造技術(shù);2014年Z1期

4 趙柯;李宏達(dá);;LED——照明光源的發(fā)展[J];內(nèi)蒙古科技與經(jīng)濟(jì);2013年14期

5 田俊成;梁熠葆;唐軍;李瀟冰;;步距規(guī)檢測(cè)數(shù)控機(jī)床直線軸的技術(shù)研究[J];制造技術(shù)與機(jī)床;2013年07期

6 關(guān)葉沆;周西振;劉傳瑞;;一段圓弧上多點(diǎn)坐標(biāo)擬合圓心位置的可靠性分析[J];勘察科學(xué)技術(shù);2012年04期

7 張昌民;;發(fā)光二極管指示燈誤亮的分析與處理[J];電世界;2012年08期

8 李斌;田鶯;劉紅奇;毛新勇;彭芳瑜;;數(shù)控車床誤差快速檢測(cè)與精度標(biāo)定[J];機(jī)床與液壓;2011年17期

9 張曉輝;余寧梅;劉鍇;;基于LED的生物延遲發(fā)光檢測(cè)系統(tǒng)[J];儀器儀表學(xué)報(bào);2010年08期

10 冷洶濤;;數(shù)控機(jī)床定位精度和重復(fù)定位精度的檢驗(yàn)[J];機(jī)床與液壓;2008年08期

相關(guān)碩士學(xué)位論文 前4條

1 秦岸;基于LED光源的高速公路隧道照明節(jié)能技術(shù)研究[D];重慶交通大學(xué);2010年

2 劉金鳳;數(shù)碼相機(jī)標(biāo)定及相關(guān)技術(shù)的研究[D];重慶大學(xué);2010年

3 程吉水;工件臺(tái)激光干涉儀測(cè)量誤差模型研究[D];華中科技大學(xué);2008年

4 丁明宇;基于三維步距規(guī)的數(shù)控機(jī)床幾何誤差辨識(shí)研究[D];華中科技大學(xué);2007年

，

本文編號(hào)：2098388