车辆安全系统中的热、振动能量采集与有线通信

　　车辆安全系统中的热、振动能量采集与有线通信

　　在汽车行业，严格的安全和可靠性标准的有线网络，但不可能完全取代无线系统。虽然不明显，但能源收集在两个广阔领域发挥着潜在的作用。第一个是向主要有线网络主干提供基本数据的小型无线传感器网络供电。第二种是在电动汽车和混合动力汽车中出现的分布式储能系统中对电池充电，这种系统主要依赖汽车的有线网络来提供重要数据。

　　本文将着重介绍一些在汽车工业中具有潜力的能量收集技术和技术，并回顾目前可用于该部门的技术。典型的设备在汽车系统适用包括压电能量采集装置中é技术的volture范围，整齐地辅之以ltc3588压电收获电源线性技术。的ltc3109升压/升压转换器和电源管理IC，也从线性技术，适合收获的能量由压电或甘醇的来源。储能也将被考虑，针对超级电容超级电容器从公司和EnerChip薄膜从Cymbet可充电电池。

　　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.