車輛安全系統(tǒng)中的熱、振動能量采集與有線通信

　　在汽車行業(yè)，嚴格的安全和可靠性標(biāo)準的有線網(wǎng)絡(luò)，但不可能完全取代無線系統(tǒng)。雖然不明顯，但能源收集在兩個廣闊領(lǐng)域發(fā)揮著潛在的作用。第一個是向主要有線網(wǎng)絡(luò)主干提供基本數(shù)據(jù)的小型無線傳感器網(wǎng)絡(luò)供電。第二種是在電動汽車和混合動力汽車中出現(xiàn)的分布式儲能系統(tǒng)中對電池充電，這種系統(tǒng)主要依賴汽車的有線網(wǎng)絡(luò)來提供重要數(shù)據(jù)。

　　本文將著重介紹一些在汽車工業(yè)中具有潛力的能量收集技術(shù)和技術(shù)，并回顧目前可用于該部門的技術(shù)。典型的設(shè)備在汽車系統(tǒng)適用包括壓電能量采集裝置中é技術(shù)的volture范圍，整齊地輔之以ltc3588壓電收獲電源線性技術(shù)。的ltc3109升壓/升壓轉(zhuǎn)換器和電源管理IC，也從線性技術(shù)，適合收獲的能量由壓電或甘醇的來源。儲能也將被考慮，針對超級電容超級電容器從公司和EnerChip薄膜從Cymbet可充電電池。

　　Bandwidth demands

　　Ethernet is emerging as the preferred network standard for next generation vehicles， ultimately replacing LIN， CAN， MOST and FlexRay. It was initially deployed in some car models for on-board diagnostics as early as 2008， primarily to meet the demands for increased data bandwidth. BMW is said to be announcing vehicles that will extensively test Ethernet backbone systems within a year， with a fully Ethernet cabled vehicle by 2020.

　　Meanwhile， the number of in-car electronic systems continues to increase， and not only standard ECUs. New applications in advanced safety， infotainment and driver assistance are adding significant pressure to the essential data network at the heart of today’s vehicles， particularly with respect to wiring， bandwidth and power requirements. These more complex applications， originally the domain of luxury vehicles， are now becoming commonplace on mid-range， and even economy models.

　　One of the fastest growing segments is advanced driver assistance systems （ADAS）。 Cameras are becoming widely used： watching the rear view， the driver side， and the curbside （see Figure 1）。 The requirement to shift and process uncompressed video data for object detection， is further driving the need for high bandwidth data networks.