【正文】 度”返回圖44 播報顯示程序流程圖顯示“0”播報“0”該系統(tǒng)中用到了兩個中斷，一個是FIQ中斷，在這個中斷里調用F_FIQ_Service_SACM_S480函數進行語音解碼播報；另一個是用到的中斷是IRQ4_4KHz，按照顯示方式，七段LED顯示系統(tǒng)有靜態(tài)顯示和動態(tài)顯示之分。在靜態(tài)顯示系統(tǒng)中，每位顯示器都應有各自的鎖存器、譯碼器（若采用軟件譯碼，譯碼器可省去）與驅動器，用以鎖存各自待顯示數字的BCD碼或反碼。因此靜態(tài)顯示系統(tǒng)在每一次顯示輸出后能夠保持顯示不變，僅在待顯示數字需要改變時，才更新其數字顯示器中的鎖存的內容。這種顯示優(yōu)點是占用機時少，顯示穩(wěn)定可靠。缺點是當顯示的位數較多時，占用的I/O端口較多。在動態(tài)顯示系統(tǒng)中，微處理器或控制器應定時地對各個顯示器進行掃描，顯示器件分時輪流工作，每次只能使一個器件顯示，但由于人的視覺暫留現象，仍感覺所有的器件都在同時顯示。此種顯示的優(yōu)點是使用硬件少，占用I/O口少。缺點是占用機時長，只要不執(zhí)行顯示程序，就立刻停止顯示。但隨著大規(guī)模集成電路的發(fā)展，目前已有采用硬件對顯示器進行自動掃描的專用顯示芯片，使用電路既簡單又占用時機少。在這里用IRQ4_4KHz中斷用于刷新顯示。 本章小結本章主要介紹了系統(tǒng)軟件設計的流程，按照模塊化的設計思想，介紹了系統(tǒng)的軟件結構，闡述了各個功能模塊之間的關系。將該設計的軟件部分分為一下幾個功能模塊，即主程序部分、鍵盤掃描程序、測溫程序、播報顯示程序、中斷服務程序。千萬不要刪除行尾的分節(jié)符，此行不會被打印?！敖Y論”以前的所有正文內容都要編寫在此行之前。 52 結論智能儀器的主要特征是以微處理器為核心進行工作，因而智能儀器具有強大的控制和數據處理功能，使測量儀器在實現自動化，改善性能，增強功能以及提高精度和可靠性方面發(fā)生了較大的變革。本文較完整地討論了紅外測溫技術的發(fā)展狀況、理論基礎及利用單片機實現紅外測溫的方法，克服了傳統(tǒng)的測溫模式弊端，且具備回應速度快、測量精度高、測量范圍廣和可同時測量環(huán)境溫度和目標溫度的特點。其主要研究內容如下：1. 紅外測溫技術國內外發(fā)展狀況，并將兩者進行了對比，相比之下，測溫精度及測溫分辨率也不如國外產品在技術性能上國內產品與國外產品相比還有一定差距，但隨著紅外產品在國內應用得更加普及，會有更多廠家和科研機構進行這方面的研究，會推動我國紅外測溫產品性能的提高。2. 紅外測溫的原理，主要根據著名的斯蒂芬玻耳茲曼定律物體的溫度越高，在相同的輻射率情況下，其輻射度越高，也就是說表面輻射出來的能量就越多，依照這一定律，隨著紅外材料制造技術和微電子技術的發(fā)展與開發(fā)應用，紅外輻射測溫技術獲得了迅速的發(fā)展，被越來越廣泛地使用。3. 系統(tǒng)硬件設計，以SPCE061A為控制中心，負責控制啟動溫度的測量、接受測量數據、計算溫度值，并根據取得的鍵值控制播報顯示過程，同時通過音頻輸出通道播報溫度值。4. 系統(tǒng)軟件設計，按照模塊化的設計思想，將該設計的軟件部分分為一下幾個功能模塊，即主程序部分、鍵盤掃描程序、測溫程序、播報顯示程序、中斷服務程序。本系統(tǒng)通過按鍵操作，并能顯示和播報測量溫度，操作非常簡單，具有較好的人機接口，這些特點克服了傳統(tǒng)測溫計的諸多不便。與此同時，該系統(tǒng)存在一些缺點如：傳感器本身不宜迅速在兩種溫差較大的環(huán)境中測量，這樣會使測量不夠準確；系統(tǒng)的軟件功能模塊還需要進行優(yōu)化。今后的工作還應該在以上兩方面繼續(xù)研究。致謝經過將近一個學期的忙碌，本次畢業(yè)設計已經接近尾聲，作為一個本科生的畢業(yè)設計，由于經驗的匱乏，難免有許多考慮不周全的地方，如果沒有導師的督促指導，以及一起工作的同學們的支持，想要完成這個設計是難以想象的。在這里首先要感謝我的導師xx老師。x老師平日里工作繁多，但在我做畢業(yè)設計的每個階段，從查閱資料到設計方案的確定和修改，中期檢查，后期詳細設計等整個過程中都給予了我悉心的指導。我的設計較為復雜煩瑣，但是x老師仍然細心地糾正畢業(yè)設計中的錯誤。除了敬佩x老師的專業(yè)水平外，他的治學嚴謹和科學研究的精神也是我永遠學習的榜樣，并將積極影響我今后的學習和工作。 其次要感謝我的同學對我無私的幫助，特別是在軟件的使用方面，正因為如此我才能順利的完成設計。最后，特別要感謝最后要感謝我的家人，他們一直在背后支持我的學業(yè)，給予我殷切的企盼和鼓勵，在此向家人致以最誠摯的謝意。參考文獻1 ,1999，（01）：10～132 ，2004：1～23 ，1997，17（05）：57～614 ，2006，33（10）：22～235 ，2004：1～96 ，2007：3～97 ，2006：111～1278 ，20059 ，200510 ，2004：22～2611 ，2006：173～17912 ，2005,15(21):245～24613 ，1997，18（04）：20～2514 GLORIA . Calibration procedure developed for IR surfacetemperature TRANSACTIONSON COMPONENTS,HYBRIDS,AND MANUFACTURING TECHNOLOGY, 1999,12(04):690～69515 Pentti Korhonen. Improved infrared temperature sensing system for mobile devices. Kimmo Keranen. 2nd Electronics Systemintegration Technology Conference, , 2008:809～81416 . Temperature measurement in the external auditory meatus by an IR optical fiber. Engineering in Medicine and Biology Society, 1998,20(02):953～955附錄AImproved infrared temperature sensing system for mobile devicesAbstractAn infrared (IR) temperature measurement systemconsists of not only a sensor module and electronics, but also an optomechanical system that guides IR radiation onto the sensor. The geometry and emissivity of the parts affects the reading, if the detector sees not only the target but parts of the measuring system itself. In normal industrial applications, the optics is designed so that the surfaces stabilize to the same temperature as the allows the error caused by the device temperature to be easily calibrated away. The correction is valid for stationary conditions and usually near the calibration temperature, which is typically at room , we show that if the sensor is embedded into a mobile (handheld) device which has heat sources, such as power electronics, the normal conditions are no longer valid and the calibration fails. In order to improve infrared temperature sensing for mobile devices, the optics concept was studied and detailed design was performed. In addition, the optics performance was modelled and verified by measurement sensor prototyping. A calibration procedure noticing ope~a~ional temperature variations was applied. The repeatabIlIty of the implemented IR temperature sensor using on a correct transferred calibration curve was better than 177。 176。C in an operational temperature range from + to + 176。C and target range from +10 to +90 176。C.Introduction Temperature is probably the most measured environmental parameter in the world. The global warming has dramatically increased the need of accurate temperature measurement of the environment. Temperature measurement is also required in numerous industrial and domestic applications. One important example is the temperature control of a microprocessor in a PC. Based on the temperature information produced by a thermistor both the microprocessor and the cooling system operation can be optimally controlled. Temperature control is also typically needed in household appliances, such as refrigerators, coffee makers and electric ovens. In addition, overheating protection is applied in several devices, such as motors and batteries. In consumer electronics, the main application is body thermometers, typically measured from the tympanic membrane in the ear. It is only natural to consider whether temperature sensing, which has such ubiquitous applications andgeneral interest, could be implemented in mobile handheld devices such as mobile phones. ThermIstorbased temperature sensors exist in a variety of products,including wristwatches and also a few mobile phones. However, their performance is highly limited for a simple physical reason. If we put a thermistor inside a mobile device we are able to measure the temperature of a localis~d volume within the device case. However, this does not necessarily correlate at all with the real ambient temperature due to two main reasons. Thermal contact from the environment to the thermistor is weak, but thermal contact from the device itself to the thermistor is strong. In addition, mobile device can contain heat sources, such as power electronics, which easily increase the temperature within the device. Naturally, the heating effect is larger close to the heat sources, but heat conduction throughout the device affects all locations within the device. Locating the sensor outside the c