A860-0316-T00130A860-0316-T00130A860-0316-T00130A860-0316-T00130A860-0316-T00130
西門子正與德國(guó)聯(lián)邦鐵路公司合作開展對(duì)高速列車進(jìn)行預(yù)測(cè)性維護(hù)和維修的試點(diǎn)項(xiàng)目。我們的數(shù)據(jù)分析師和軟件可以從車輛的運(yùn)行數(shù)據(jù)中識(shí)別出特定模式和趨勢(shì)。不僅如此,人工智能還助力我們?yōu)榧械啦聿倏v樓建造優(yōu)化的控制中心。人工智能軟件可以從數(shù)十億種可能的集中道岔操縱樓硬件配置中,挑選出能夠充分滿足包括可靠運(yùn)行在內(nèi)的所有要求的選項(xiàng)。30
四、機(jī)型的選擇30
PLC系統(tǒng)的通信網(wǎng)絡(luò)中,上級(jí)的網(wǎng)絡(luò)通信速率應(yīng)大于1Mbps,通信負(fù)荷不大于60%。PLC系統(tǒng)的通信網(wǎng)絡(luò)主要形式有下列幾種形式:1)PC為主站,多臺(tái)同型號(hào)PLC為從站,組成簡(jiǎn)易PLC網(wǎng)絡(luò);2)1臺(tái)PLC為主站,其他同型號(hào)PLC為從站,構(gòu)成主從式PLC網(wǎng)絡(luò);3)PLC網(wǎng)絡(luò)通過(guò)特定網(wǎng)絡(luò)接口連接到大型DCS中作為DCS的子網(wǎng);4)專用PLC網(wǎng)絡(luò)(各廠商的專用PLC通信網(wǎng)絡(luò))。30
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很快,這個(gè)問(wèn)題將成為歷史,因?yàn)樨?fù)責(zé)為各種系統(tǒng)制定標(biāo)準(zhǔn)的電氣和電子工程師協(xié)會(huì)(IEEE)已通過(guò)添加實(shí)時(shí)通信機(jī)制擴(kuò)展了以太網(wǎng),從而滿足這一迫切需求。這些機(jī)制包括時(shí)間控制傳輸、同步和帶寬預(yù)留等。通過(guò)這種方式,IEEE借助TSN提高了服務(wù)質(zhì)量。這樣一來(lái),以太網(wǎng)將能夠向連接的所有支持這些擴(kuò)展標(biāo)準(zhǔn)的設(shè)備提供相同的時(shí)間信息。終,整個(gè)網(wǎng)絡(luò)將實(shí)現(xiàn)精確同步。除此之外,預(yù)留協(xié)議可確保按照預(yù)定義的時(shí)間表,通過(guò)所有中間交換機(jī)將數(shù)據(jù)包從發(fā)送方傳送至目的地。TSN標(biāo)準(zhǔn)還將有關(guān)網(wǎng)絡(luò)的拓?fù)浼{入考慮,即,網(wǎng)絡(luò)部署是星型、環(huán)型,還是線型,以及發(fā)送方與接收方之間的交換機(jī)的數(shù)量。此外,TSN標(biāo)準(zhǔn)還包含無(wú)縫冗余流程。30
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ohne
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船上的所有東西,從航行燈到自動(dòng)化系統(tǒng),都需要用電。越來(lái)越多的現(xiàn)代化船只開始使用柴油電力推進(jìn)系統(tǒng)或備用電力推進(jìn)系統(tǒng),俗稱助推器。船上幾乎沒(méi)有任何設(shè)備或系統(tǒng)是不用電運(yùn)行的。30