為提高太陽能的利用率，以ATmega8單片機(jī)為控制核心，設(shè)計了一套光電跟蹤與視日運動軌跡跟蹤互補(bǔ)控制的雙軸太陽跟蹤器。該跟蹤器在晴天時，利用光敏電阻采集光強(qiáng)判斷太陽位置,控制步進(jìn)電機(jī)實現(xiàn)光電跟蹤；在陰天時，采集時鐘器件PCF8583的時間信息,計算當(dāng)前太陽位置來實現(xiàn)視日運動軌跡跟蹤。實驗表明：該太陽跟蹤器能在不同天氣狀況下對太陽進(jìn)行較準(zhǔn)確地跟蹤，能量接收效率提高了30%，達(dá)到充分利用太陽能的目的。 Abstract: To improve the utilization rate of solar energy，a kind of solar tracking controller which effectively combined the sun angle tracking and photo electric tracking based on ATmega8is designed.In the sunny days，the solar tracking con-troller determines the sun's position by using photosensitive resistances to collect light intensity and control stepper motors to achieve photo electric tracking，n cloudy days，it collects clock chip PCF8583time information to calculate the current position of the sun and achieve the sun angle tracking.Experimental results show the solar tracking controller accurately tracks the sun in different weather conditions，improves received energy efficiency by30%and reaches the purpose of full use of solar energy.
上傳時間： 2013-10-15
上傳用戶：urgdil
介紹一種基于CAN總線的牽引變電站自動化系統(tǒng)通訊規(guī)約的設(shè)計，CAN通訊規(guī)約采用標(biāo)準(zhǔn)幀，報文采用主動發(fā)送和發(fā)送查詢兩種處理形式。該設(shè)計在城市輕軌與地鐵牽引變電站中的應(yīng)用表明：可實現(xiàn)間隔層和通訊處理層的數(shù)據(jù)快速、可靠的交換，提高牽引變電站的安全性和穩(wěn)定性 。 Abstract: This paper firstly presents a kind of design dealing with communicational protocol to the traction substation automation system based on CAN bus,and then comes up with the ideas that all frames of CAN communicational protocol should adopt the standard frame,and that messages be processed by two ways:sending initiatively and sending quiries.Subway and light rail application shows that the use of the CAN bus is possible to exchange data quickly and reliably between the layers of the middle and the communicational processing,hence to improve the safety and stability of traction substations.
上傳時間： 2013-11-07
上傳用戶：bs2005
This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.
標(biāo)簽： Pulsoximeter Single-Chip Des
上傳時間： 2013-10-27
上傳用戶：黑漆漆
FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples
上傳時間： 2013-10-13
上傳用戶：13162218709
摘要：本水位監(jiān)測報警器使用5V低壓直流電源（也可以用3節(jié)5號電池代替）就可以對5~15厘米的水位進(jìn)行監(jiān)測，用LED顯示和數(shù)碼管顯示水位，并可以對不再此范圍內(nèi)的水位發(fā)出報警。主要采用CD4066、74LS86、74LS32、CD4511芯片，再加上數(shù)碼管、蜂鳴器、發(fā)光二極管、電阻這些器件組成一個簡單而靈敏的監(jiān)測報警電路，操作簡單，接通電源即可工作。因為大部分電路采用數(shù)字電路，所以本水位監(jiān)測報警器還具有耗能低、準(zhǔn)確性高的特點。關(guān)鍵字：譯碼電路 報警電路 監(jiān)測電路 Abstract: The water level alarm monitoring the use of 5 V low-voltage DC power (can also use three batteries replaced on the 5th) will be able to 5 to 15 centimeters of water level monitoring, with LED display and digital display of water level, and this can no longer Within the scope of a water level alarm. Mainly CD4066, 74LS86, 74LS32, CD4511 chips, coupled with digital control, buzzer, light-emitting diode, the resistance of these devices composed of a simple and sensitive monitoring alarm circuits. Because the majority of circuits using digital circuitry, so the water level monitored alarm system also has low energy consumption, high accuracy of the characteristics. Keyword: Decoding circuit alarm circuit monitoring circuit
標(biāo)簽： 水位 監(jiān)測報警 系統(tǒng)原理
上傳時間： 2013-11-05
上傳用戶：王慶才
飛思卡爾S12處理器培訓(xùn)講義 In this LAB, we will: Get familiar with CodeWarrior 4.7 IDE; How to work with project wizard; Light the LEDs
標(biāo)簽： S12 飛思卡爾 處理器 培訓(xùn)講義
上傳時間： 2013-11-13
上傳用戶：LIKE
機(jī)場道面異物是威脅跑道運行安全的常見病害，及時、準(zhǔn)確的檢測異物具有現(xiàn)實意義。針對現(xiàn)有的人工目視檢測方法，本文基于圖像處理理論，提出了一種機(jī)場道面異物的自動檢測算法。根據(jù)機(jī)場道面的復(fù)雜背景和常見異物的特點，本文采取了分塊的方法，選擇Harris角點、灰度共生矩陣、灰度級分布范圍等特征，分別用閾值法和SVM法對實際機(jī)場道面異物圖像進(jìn)行檢測。初步實驗證明，該方法可以有效檢測出機(jī)場道面復(fù)雜背景下的異物，實驗結(jié)果顯示，檢測正確率達(dá)到了98%。
上傳時間： 2013-11-26
上傳用戶：2404
高性能光電傳感器具有以下特性： 電源可選; 模式可選： Dark ON / Light ON; 輸出形式： NPN / PNP / 繼電器輸出; 響應(yīng)速度快; 預(yù)報警功能; 保護(hù)距離長; 抗干擾性強(qiáng);輸入回路保護(hù); 輸出回路短路保護(hù);相鄰多個傳感器可并排使用相互之間不干擾
標(biāo)簽： 光電 開關(guān)電路 模塊設(shè)計
上傳時間： 2015-01-02
上傳用戶：cknck
具有結(jié)構(gòu)風(fēng)險最小化原則的支持向量機(jī)（SVM）對于小樣本決策具有較好的學(xué)習(xí)推廣性，并且故障樣本的不足在一定程度上制約了基于知識的方法在故障診斷中的運用。針對這一問題，提出了利用支持向量機(jī)的方法對匝間轉(zhuǎn)子繞組短路故障診斷方法。該方法利用小波分析對探測線圈測得感應(yīng)電動勢進(jìn)行處理構(gòu)造特征向量，然后輸入到支持向量機(jī)的多故障分類器中進(jìn)行故障識別。實驗數(shù)據(jù)表明該方法是可行、有效的，并且在小樣本的情況下，較BP神經(jīng)網(wǎng)絡(luò)有更好的分類效果。
標(biāo)簽： 支持向量機(jī) 發(fā)電機(jī) 匝間 轉(zhuǎn)子
上傳時間： 2013-11-04
上傳用戶：s363994250
Abstract: This application note explains how to design an intelligent lighting controller that senses and measures the ambient lightlevel with an ambient light sensor (ALS). Equipped with a real-time clock (RTC), the controller also knows when to turn lighting on oroff at specified times. The system presented in this document can be used to control all luminaires that are mains-supply operated.Controller software is also provided in hex format.
標(biāo)簽： 智能照明控制器 測量 環(huán)境光線
上傳時間： 2013-11-18
上傳用戶：AbuGe
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