系統(tǒng)以AT89C2051為核心,基于DS18B20的單總線模式設(shè)計了一個多點環(huán)境溫度采集系統(tǒng),解決了傳統(tǒng)測溫系統(tǒng)的結(jié)構(gòu)復(fù)雜,功耗高,不適應(yīng)野外無人值守環(huán)境溫度檢測的問題。文章給出了各模塊的硬件電路,軟件設(shè)計流程以及程序編制中的注意事項。經(jīng)實驗,該系統(tǒng)工作穩(wěn)定可靠,功耗低,非常適合無人值守情況下的野外環(huán)境溫度檢測。
上傳時間: 2013-10-30
上傳用戶:truth12
CTP單層多點設(shè)計
上傳時間: 2013-11-15
上傳用戶:banyou
簡單介紹了單層多點的實現(xiàn)
上傳時間: 2013-10-26
上傳用戶:Bert520
多功能智能溫室監(jiān)控系統(tǒng)設(shè)計
標簽: 多功能 智能溫室 監(jiān)控 系統(tǒng)設(shè)計
上傳時間: 2013-11-04
上傳用戶:Altman
智能巡線小車的多模式速度控制系統(tǒng)
上傳時間: 2013-10-27
上傳用戶:253189838
聲源檢測與定位的多分辨處理的原理!
上傳時間: 2013-10-24
上傳用戶:yzy6007
基于紅外探測原理的多路無線安防系統(tǒng)設(shè)計
標簽: 紅外探測 多路 無線安防 系統(tǒng)設(shè)計
上傳時間: 2013-11-15
上傳用戶:semi1981
特點 精確度0.1%滿刻度 可輸入交直流電流/交直流電壓/電位計/傳送器...等信號 16 BIT類比輸出功能 輸入與輸出絕緣耐壓2仟伏特/1分鐘 寬范圍交直流兩用電源設(shè)計 尺寸小,穩(wěn)定性高 2主要規(guī)格 精確度: 0.1% F.S. (23 ±5℃) 顯示值范圍: 0-±19999 digit adjustable 類比輸出解析度: 16 bit DAC 輸出反應(yīng)速度: < 250 ms (0-90%)(>10Hz) 輸出負載能力: < 10mA for voltage mode < 10V for current mode 輸出之漣波: < 0.1% F.S. 歸零調(diào)整范圍: 0- ±9999 Digit adjustable 最大值調(diào)整范圍: 0- ±9999 Digit adjustable 溫度系數(shù): 50ppm/℃ (0-50℃) 顯示幕: Red high efficiency LEDs high 10.16mm (0.4") 隔離特性: Input/Output/Power/Case 參數(shù)設(shè)定方式: Touch switches 記憶方式: Non-volatile E2PROM memory 絕緣抗阻: >100Mohm with 500V DC 絕緣耐壓能力: 2KVac/1 min. (input/output/power) 1600Vdc (input/output) 使用環(huán)境條件: 0-60℃(20 to 90% RH non-condensed) 存放環(huán)境條件: 0-70℃(20 to 90% RH non-condensed) 安裝方式: Socket/plugin type with barrier terminals CE認證: EN 55022:1998/A1:2000 Class A EN 61000-3-2:2000 EN 61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001
上傳時間: 2014-01-05
上傳用戶:eastgan
多遠程二極管溫度傳感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
標簽: Considerat Design 遠程 二極管
上傳時間: 2014-12-21
上傳用戶:ljd123456
提出一種融合Ad hoc網(wǎng)絡(luò)、GPRS/GSM和PSTN的遠程分布式環(huán)境狀況實時監(jiān)測系統(tǒng)設(shè)計方案。由IEEE 802.15.4標準組建的Ad hoc無線傳感器網(wǎng)絡(luò)負責監(jiān)測環(huán)境溫濕度、光照度、煤氣及CO濃度等;采用GPRS/GSM模塊和嵌入式Modem構(gòu)造無線網(wǎng)關(guān),實現(xiàn)Ad hoc網(wǎng)絡(luò)與GPRS/GSM和PSTN的無縫連接,將無線傳感器網(wǎng)絡(luò)采集的數(shù)據(jù)發(fā)送到手機或遠端計算機。系統(tǒng)具有小、遠和散的特點,可實現(xiàn)多點分布、中央管理、多層報警和遠程監(jiān)測。
標簽: 多網(wǎng)融合 環(huán)境 實時監(jiān)測 遠程
上傳時間: 2013-11-08
上傳用戶:semi1981
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1