6DR1900-5
6DR1900-5
6DR1900-5
《聯(lián)系人；歐先生》
《座機(jī)：0592-5709825》
《傳真：0592-5917519》
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《QQ ：2479261344》
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針對(duì)一些高要求的應(yīng)用程序，傳感器的運(yùn)行模式可以迅速更換，只在真正有需要時(shí),才會(huì)提高分辨率和數(shù)據(jù)傳輸速率。有些傳感器甚至能夠自動(dòng)轉(zhuǎn)換模式。客戶可自行配置活動(dòng)狀態(tài)下所需要的分辨率和數(shù)據(jù)傳輸速率，并自定義啟動(dòng)它的條件。這時(shí)傳感器會(huì)進(jìn)入靜止?fàn)顟B(tài)，但仍會(huì)繼續(xù)測(cè)量數(shù)據(jù)，并以極低的數(shù)據(jù)傳輸速率和分辨率進(jìn)行，等出現(xiàn)設(shè)定條件(動(dòng)作事件)才切換回到啟動(dòng)狀態(tài)。
另一個(gè)不錯(cuò)的設(shè)計(jì)原則是利用低供電水平，因?yàn)檩^低的供電水平也意味著更低的電流消耗。這就是為什么對(duì)于低功率的應(yīng)用，1.8V電源是首選。
在某些設(shè)計(jì)中，可以使用傳感器的功率循環(huán)。傳感器的電源只有在需要測(cè)量時(shí)才會(huì)被激活，否則傳感器就會(huì)處于關(guān)閉狀態(tài)。我們可以通過(guò)從微控制器的引腳上提供傳感器的電源來(lái)實(shí)現(xiàn)。如圖2所示。在應(yīng)用這種技術(shù)時(shí)，需要正確的計(jì)算功耗預(yù)算，因?yàn)槊總�(gè)傳感器的啟動(dòng)都需要對(duì)其進(jìn)行配置和等待，直到輸出被確定，并提供正確的數(shù)據(jù)。
圖2：透過(guò)為控制微控制器針腳控制傳感器電源供應(yīng)
大多數(shù)MEMS加速計(jì)都是數(shù)字傳感器，這代表它們可以將測(cè)量的模擬信號(hào)轉(zhuǎn)換成數(shù)字?jǐn)?shù)據(jù)。因?yàn)橛屑傻哪M信號(hào)轉(zhuǎn)換器，加上對(duì)信號(hào)失真的敏感度較低，物料清單項(xiàng)目得以減少，但這并不是唯一的優(yōu)點(diǎn)。嵌入的中斷生成器MEMS加速計(jì)可以在滿足用戶設(shè)定的參數(shù)條件發(fā)生時(shí)，產(chǎn)生觸發(fā)信號(hào)，這就是用動(dòng)作感應(yīng)喚醒功能的方式。微控制器(MCU)配置傳感器來(lái)產(chǎn)生一個(gè)喚醒觸發(fā)器，并進(jìn)入功耗極低的睡眠模式。當(dāng)一個(gè)動(dòng)作被檢測(cè)到是，傳感器會(huì)產(chǎn)生一個(gè)中斷信號(hào)，MCU接到信號(hào)后會(huì)切換到一個(gè)合適的操作模式，然后處理剛剛發(fā)生的情況。
數(shù)字傳感器也可以接管有微控制器執(zhí)行的運(yùn)動(dòng)處理有關(guān)的任務(wù)。MCU當(dāng)然可以執(zhí)行相同的工作，但是功率效率要低得多——MCU的耗電是一毫安計(jì)算，傳感器則是微安。檢測(cè)自由落體、單點(diǎn)、雙擊(用戶動(dòng)作類(lèi)似鼠標(biāo)點(diǎn)擊)、人像/景觀方向檢測(cè)等，是通過(guò)傳感器內(nèi)部邏輯實(shí)現(xiàn)的。MCU不需要進(jìn)行任何計(jì)算，只需要等待一個(gè)中斷觸發(fā)，并且只在它發(fā)生時(shí)對(duì)動(dòng)作作出反應(yīng)。
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50 Allen Bradley Carbon Comp Resistors 100k 1/2W 5%
Lot (4) Allen Bradley 100-C23*10 Contactor w/ relay S3
Allen Bradley SLC 100 w/ expansion unit
100 Allen Bradley Carbon Comp Resistors 100k 1/2W 5%
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Allen Bradley PLC SLC-100/150 1745-PCC cable (7ft)
ALLEN BRADLEY 100-B25ON*3 CONTACTOR 3 PHASE 600 VAC MAX
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ALLEN BRADLEY 1336S-BRF100-AA-EN4 SER E AC DRIVE
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Allen Bradley Contactor 100-C12Z*10 Series A
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LOT 3 ALLEN BRADLEY 100-C09*10 & 193-EA1DB CONTR. & REL
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ALLEN BRADLEY 140-MN-0630 100-C09*10 STARTER CONTACTOR
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100 Ohm 2W 5% Carbon Comp ALLEN BRADLEY resistor 25 ea.
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Allen Bradley Bar Code Reader Wedge Access 2755-CE100
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Allen Bradley PLC SLC-100/150 1745-PCC cable (12ft)
4 ALLEN-BRADLEY 1492-CB2G100 10-AMP CIRCUIT BREAKERS
ALLEN BRADLEY BAR CODE DECODER 100-240VAC 2755-DD1A
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3-ALLEN BRADLEY 100 SERIES CONTACTORS (GOOD CONDITION)
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ALLEN-BRADLEY 1745-TCAT CONTROL UNIT,SLC-100,150,KEY
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