本文選題：LAMOST + 小型化設(shè)計(jì)　； 參考：《中國科學(xué)技術(shù)大學(xué)》2017年碩士論文

【摘要】：LAMOST(The Large Sky Area Multi-Object Fiber Spectroscopic Telescope)是一個(gè)反射式施密特天文望遠(yuǎn)鏡,它的最重要組成部分就是一個(gè)直徑為1.75m的焦面板,并且在焦面板上安裝有4000根光纖。為了 4000根光纖的準(zhǔn)確定位,在焦面板上還安裝有4000個(gè)光纖定位單元,每一個(gè)光纖定位單元精確的控制著一根光纖的位置。作為中國科技大學(xué)工程科學(xué)學(xué)院自主創(chuàng)新和設(shè)計(jì)的國家大科學(xué)工程項(xiàng)目,截止到2017年,LAMOST的光纖定位系統(tǒng)已經(jīng)穩(wěn)定的工作了 9個(gè)年頭。但隨著LAMOST天文望遠(yuǎn)鏡的不斷優(yōu)化和改進(jìn),現(xiàn)在對其提出了更高的觀測要求。為了達(dá)到這個(gè)要求,就需要將光纖定位單元小型化設(shè)計(jì)。每一個(gè)光纖定位單元包含3部分:無線驅(qū)動(dòng)板系統(tǒng)、雙回轉(zhuǎn)機(jī)械機(jī)構(gòu)、2個(gè)步進(jìn)電機(jī)。為了將光纖定位單元小型化設(shè)計(jì),將步進(jìn)電機(jī)的直徑從10mm縮小到了 6mm,但雙回轉(zhuǎn)機(jī)械結(jié)構(gòu)的尺寸還要由無線驅(qū)動(dòng)板來決定,所以小型化無線驅(qū)動(dòng)板成了本畢業(yè)設(shè)計(jì)的重點(diǎn)和難點(diǎn)。上一代無線驅(qū)動(dòng)板的長度和寬度分別為104mm和15mm,其主要有基于Zigbee無線通信的片上系統(tǒng)和步進(jìn)電機(jī)驅(qū)動(dòng)模塊兩部分組成。為了將其小型化設(shè)計(jì),本課題采取了兩個(gè)步驟。第一步,用TI公司開發(fā)的基于IEEE 802.15.4和Zigbee的無線單片機(jī)CC2530代替飛思卡爾公司開發(fā)的MC13213無線單片機(jī)。MC13213的尺寸為9mm×9mm,而CC2530的尺寸為6mm×6mm,不僅比MC13213尺寸小很多,而且在性能上優(yōu)于MC13213。第二步,重新設(shè)計(jì)整個(gè)無線驅(qū)動(dòng)板,其中包含更換更小尺寸的元器件和重新布局元器件的位置,以達(dá)到最好的通信性能。最終,在滿足各種功能的前提下,無線驅(qū)動(dòng)板的整體尺寸相對于上一代縮小了 40%,這樣使得每個(gè)光纖定位單元的尺寸可以設(shè)計(jì)的更小,最終達(dá)到了光纖定位系統(tǒng)的小型化設(shè)計(jì)。
[Abstract]:LAMOST(The Large Sky Area Multi-Object Fiber Spectroscopic Telescopeis a reflective Schmidt astronomical telescope, the most important component of which is a 1.75m diameter focal panel, on which 4000 optical fibers are mounted. In order to locate 4000 optical fibers accurately, 4,000 optical fiber positioning units are installed on the focal panel, each optical fiber positioning unit accurately controls the position of one optical fiber. As an independent innovation and design project of China University of Science and Technology, the optical fiber positioning system of LAMOST has been working steadily for 9 years by 2017. However, with the continuous optimization and improvement of the LAMOST telescope, higher observation requirements have been put forward. In order to meet this requirement, it is necessary to miniaturize the optical fiber positioning unit. Each optical fiber positioning unit consists of three parts: wireless drive board system, double rotary mechanism, and 2 step motors. In order to miniaturize the fiber optic positioning unit, the diameter of the stepping motor was reduced from 10mm to 6mm, but the size of the double-rotating mechanical structure was determined by the wireless drive board. So miniaturized wireless drive board has become the focus and difficulty of the graduation design. The length and width of the previous generation wireless driver board are 104mm and 15mm respectively. It mainly consists of two parts: the on-chip system based on Zigbee wireless communication and the stepper motor driving module. In order to miniaturize the design, this paper takes two steps. The first step is to use the wireless MCU CC2530 based on IEEE 802.15.4 and Zigbee developed by TI Company to replace the MC13213 wireless MCU .MC13213 developed by Freescale Company, and the size of CC2530 is 6mm 脳 6mm, which is much smaller than that of MC13213, and its performance is better than that of MC1321313. The second step is to redesign the entire wireless driver board, which includes the replacement of smaller components and the repositioning of components to achieve optimal communication performance. Finally, under the premise of satisfying various functions, the overall size of the wireless driver board is reduced by 40 parts compared with the previous generation, which makes the size of each optical fiber positioning unit smaller, and finally achieves the miniaturization design of the optical fiber positioning system.
【學(xué)位授予單位】：中國科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH751;TN92

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