LED分光機總體設計

中文摘要

隨著半導體發(fā)光材料的發(fā)展，發(fā)光二極管(LED)應用日趨廣泛，這對LED的檢測與分揀技術要求越來越高。本課題研究的LED分光機采用光、電參數(shù)相結合的檢測方法進行分選，將檢測與分選相結合，增強了該系統(tǒng)的實用性。
在LED分光機的研究中，具體內容如下:
首先，確定檢測發(fā)光二極管的方法。在本系統(tǒng)中需要檢測的光電參數(shù)是:正向導通電壓、反向電流、光強和波長;介紹用單色儀與線陣CCD相結合的分光檢測系統(tǒng).
其次 ，確定發(fā)光二極管的分類方法。根據(jù)發(fā)光二極管的光電參數(shù)的檢測系統(tǒng)測得的數(shù)據(jù)，確定作為分類標準的參數(shù):其中電參數(shù)采用正向導通電壓，光學參數(shù)采用光強，而波長則采用主波長,來替代傳統(tǒng)方法所采用的峰值波長，使分類更直觀。
最后，也是本設計的重點內容，是進行LED分光機的總體設計，主要包括該系統(tǒng)的機構設計和控制系統(tǒng)的設計。在機構設計過程中為保證運動精度，采用一系列措施來消除傳動中的虛位和間隙, 還設計了一種更加實用的復合凸輪機構。控制系統(tǒng)采用工控機作為上位機，來控制外圍設備，完成上料、測試、下料動作，將該LED放入相對應的料箱中，本系統(tǒng)能夠實現(xiàn)80級的分類。
整個系統(tǒng)的操作界面清晰，結構合理，易于維護，操作簡單，具有較好的市場前景。

關鍵詞: 發(fā)光二極管，自動分選，自動檢測

Abstract

With the updating of luminescence material, more and more types of LED come into being. And LED is used widely, especially in screen. So the technology about the measurement of LED is required. This subject on the measurement and classifying of LED accelerates the development of technology on the test of LED, and this subject which integrates the test with classifying makes this system more useful.
In this automatic classifying system, the research is as follows:
First, the method to measure LED is confirmed .In this system the electric and spectral parameters are selected. Then the optical system is de signed. The optical system includes single wave apparatuses and CCD, and the analysis system of data.
Second, the way to classify LED is confirmed. According to the data collected from the LED's measurement system, the parameters which are selected as classifying parameters are confirmed. And these parameters are positive voltage, countercurrent, spectral intensity and dominating wavelength. And this system abandons the conventional method that make middle wavelength as the parameter.
Finally, the LED's classifying system is designed. The system includes mechanical part and the control system part. During the mechanical design, in order to ensure the motion accuracy, a series of methods are adopted to minimize the invalids pace and gap. Besides, the application of a new cam is put forward in this thesis .In the mechanical part there are two positions as the test position and up position. And in the control system the computer is as upper computer, it controls the mechanical part.
The whole system has clear operation interface, the structure is rational and is easy to repair. And the operation system is easy to lean. So it will be used widely in the future.

Key Words: LED, Automatic classifying, Automatic test

 
目   錄

中文摘要 Ⅰ
ABSTRACT Ⅱ
1緒論 1
  1.1發(fā)光二極管概述 1
    1.1.1發(fā)光二極管的性能特點 1
    1.1.2 發(fā)光二極管的分類 1
  1.2發(fā)光二極管的特性參數(shù)及測試方法 2
    1.2.1發(fā)光二極管的電特性參數(shù) 2
1.2.2發(fā)光二極管的光學參數(shù) 3
1.3 LED分光機概述 5
1.3.1 LED分光機分類及特點 5
1.3.2 LED分光機研究背景 5
1.3.3 國內外LED分光機的研究現(xiàn)狀分析 5
  1.4 本文研究主要內容………………………………………………………6
 2 LED分光機總體方案設計 7
  2.1 LED分光機臺自動化裝置結構構成 8
    2.1.1進料結構 9
    2.1.2 定為測試結構 11
    2.1.3 出料結構 13
2.2光學系統(tǒng)的選用 15
 2.3 探測器的選用 17
2.4 傳動方案的設計 18
     2.4.1 主機傳動 18
     2.4.2副機傳動 18
2.5 其他輔助系統(tǒng)的設計 18
     2.5.1 氣壓氣動系統(tǒng) 18
 2.5.2 靜電消除系統(tǒng) 18
     2.5.3 分料儲料系統(tǒng) 18
3 主要機械結構的設計 19
 3.1復合凸輪機構的設計 19
3.2 電機系統(tǒng)的設計 26
3.3 同步帶及同步帶輪的設計 27
4 LED分光機進料測試流程 29
5 總結 32
參考文獻 33
附錄A：擺動從動件盤形凸輪機構設計參數(shù) 34