本文選題：自動(dòng)拾取器　切入點(diǎn)：DSP　出處：《長(zhǎng)春工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：貼片機(jī)是把表貼組件貼裝在印制電路板上的一種設(shè)備。隨著印制電路板的誕生,電子技術(shù)邁向了新的時(shí)代,有效推動(dòng)了電子組裝領(lǐng)域的發(fā)展,貼片機(jī)就是在這樣的背景下發(fā)展起來(lái)的。由于電子產(chǎn)品的大量生產(chǎn),進(jìn)一步促使了貼片機(jī)技術(shù)的快速進(jìn)步。自動(dòng)拾取器作為貼片機(jī)中最重要的部件,集成了貼片機(jī)系統(tǒng)中的大多數(shù)功能,是一種高度集成化的電子設(shè)備。它的速度和精度直接關(guān)系到著貼片機(jī)的性能。自動(dòng)拾取器是貼片機(jī)配置的第一要素。早期的自動(dòng)拾取器為機(jī)械對(duì)中的手動(dòng)控制系統(tǒng),貼裝的速度較慢,很快被市場(chǎng)淘汰,取而代之的是目前的全自動(dòng)視覺自動(dòng)拾取器,它實(shí)現(xiàn)了自動(dòng)拾取器系統(tǒng)的智能化。但是隨著表貼組件的細(xì)微化,電子產(chǎn)品的高度集成化,對(duì)自動(dòng)拾取器的技術(shù)水平還有更高的要求,因此,自動(dòng)拾取器技術(shù)的提高是電子組裝領(lǐng)域進(jìn)步的核心部分。本文從自動(dòng)拾取器的硬件電路設(shè)計(jì)和軟件著手,詳細(xì)闡述了自動(dòng)拾取器的硬件構(gòu)成和軟件的實(shí)現(xiàn)。對(duì)于系統(tǒng)的硬件電路部分是以TI公司的28XX系列DSP為核心構(gòu)成的數(shù)字信號(hào)處理電路,其中視覺系統(tǒng)是采用CMOS芯片(MT9V034)作為圖像傳感器實(shí)現(xiàn)的,為了降低脈沖干擾和椒鹽噪聲又兼顧圖像的清晰度,系統(tǒng)中采用中值濾波和邊緣檢測(cè)算法對(duì)圖像的進(jìn)行去噪處理,自動(dòng)拾取器的電機(jī)驅(qū)動(dòng)電路包括采用Drv8312芯片的直線電機(jī)驅(qū)動(dòng)電路和采用Drv8824芯片的步進(jìn)電機(jī)驅(qū)動(dòng)電路構(gòu)成,分別實(shí)現(xiàn)了自動(dòng)拾取器的z軸方向運(yùn)動(dòng)和θ軸方向運(yùn)動(dòng),對(duì)于自動(dòng)拾取器的氣壓系統(tǒng),本文中采用PIC微控制器作為氣壓系統(tǒng)的主控制芯片,有效的分擔(dān)了DSP的載荷,使自動(dòng)拾取器系統(tǒng)的運(yùn)動(dòng)速度得到明顯的提高。為了實(shí)現(xiàn)上位機(jī)和自動(dòng)拾取器的友好互動(dòng),系統(tǒng)采用虛擬儀器LabVIEW編譯上位機(jī)控制界面,提高了系統(tǒng)控制的實(shí)時(shí)性,同時(shí)系統(tǒng)中采用CAN通信和USB通信實(shí)現(xiàn)了上位機(jī)和下位機(jī)、以及下位機(jī)各節(jié)點(diǎn)的信息通信。最后,本文中通過(guò)LabVIEW編譯的虛擬示波器對(duì)自動(dòng)拾取器的運(yùn)動(dòng)控制進(jìn)行了仿真和LabVIEW上位機(jī)界面的圖像采集實(shí)驗(yàn),得到了理想的波形和圖像效果,證明了本課題的自動(dòng)拾取器具備精度高和速度快的特點(diǎn)。
[Abstract]:With the birth of printed circuit board (PCB), electronic technology has entered a new era, which has effectively promoted the development of electronic assembly field. It is under this background that the placement machine is developed. Because of the mass production of electronic products, it further promotes the rapid progress of the technology of the placement machine. Automatic pick-up is the most important component in the placement machine. Integrated with most of the functions of the placement machine system, It is a highly integrated electronic device. Its speed and precision are directly related to the performance of the placement machine. Automatic pickup is the first element of the placement machine. The early automatic pickup is the manual control system in the mechanical pair. The speed of mounting is slow and is quickly eliminated by the market. Instead, the current automatic visual automatic pick-up system realizes the intelligence of the automatic pickup system. But with the refinement of the table-mount components, the electronic products are highly integrated. The improvement of automatic pickup technology is the core of the progress in the field of electronic assembly. This paper starts with the hardware circuit design and software design of the automatic pickup device. The hardware structure and software realization of the automatic pick-up device are described in detail. For the hardware circuit of the system, the digital signal processing circuit is composed of 28XX series DSP of TI Company. The vision system is realized by using CMOS chip MT9V034) as the image sensor. In order to reduce the pulse interference and salt and pepper noise, the median filter and edge detection algorithm are used to de-noise the image. The motor driving circuit of the automatic pickup consists of linear motor driving circuit using Drv8312 chip and step motor driving circuit using Drv8824 chip. The z axis movement and 胃 axis direction motion of automatic pickup device are realized, respectively. For the air pressure system of the automatic pickup, the PIC microcontroller is used as the main control chip of the air pressure system in this paper, which effectively shares the load of the DSP. In order to realize the friendly interaction between the upper computer and the automatic pickup, the system uses the virtual instrument LabVIEW to compile the upper computer control interface, which improves the real-time control of the system. At the same time, CAN communication and USB communication are used in the system to realize the information communication between the upper computer and the lower computer, as well as the nodes of the lower computer. Finally, In this paper, the motion control of the automatic pickup is simulated by the virtual oscilloscope compiled by LabVIEW and the image acquisition experiment of the LabVIEW upper computer interface is carried out, and the ideal waveform and image effect are obtained. It is proved that the automatic pickup has the characteristics of high precision and high speed.
【學(xué)位授予單位】：長(zhǎng)春工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN405

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本文編號(hào)：1594922