Poster: Power over data lines for CAN using AMI code
Poster: Power over data lines for CAN using AMI code
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海报：使用 AMI 代码为 CAN 数据线供电
DOI：
10.1109/vnc.2016.7835948
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Wakasugi
中科院分区：
文献类型：
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作者：
Tatsuki Matsushita;D. Umehara;K. Wakasugi
车辆中的电子控制单元 (ECU) 相互互连。控制器局域网络(CAN)是车载网络标准之一，应用广泛。然而，随着升级更高性能的网络，CAN 设备之间的线束需要更大的重量和空间。在本文中，我们提出了CAN供电（PoCAN），这是IEEE P802.3bu审查中的数据线供电（PoDL）的一种实现方法，用于CAN设备之间的双绞线（TP）电缆，以去除电源线。 CAN 中采用单极不归零 (NRZ) 线路码，信号中主要包含直流 (DC) 分量，因此功率叠加的单极 NRZ 码不适合 PoDL。 PoCAN 采用双极性交替反转 (AMI) 和 NRZ 线路代码，因为 AMI-NRZ 代码不包含直流分量。 PoCAN 的波形在符合 CAN 标准的总线网络中通过模拟混合信号 (AMS) 模拟器进行分析。此外，还进行了实验来评估PoCAN的帧传输。仿真和实验结果表明，所提出的PoCAN可以实现一对TP电缆中数据和直流电源的同时传输。
Electronic control units (ECUs) in vehicles are interconnected with each other. Controller area network (CAN) is one of standards for in-vehicle networks and is widely employed. However, much more weight and space of wiring harness among CAN devices have been required as upgrading higher-performance networks. In this paper, we propose power over CAN (PoCAN), which is an implementation method of power over data lines (PoDL) under the review in IEEE P802.3bu, for twisted-pair (TP) cables among CAN devices to remove power lines. Unipolar non-return-to-zero (NRZ) line codes are employed in CAN and include mainly direct current (DC) component in the signals so that power superposed unipolar NRZ codes will not be suitable for PoDL. Bipolar alternate make inversion (AMI) and NRZ line codes are exploited for PoCAN because AMI-NRZ codes do not include DC component. The waveforms of PoCAN are analyzed in bus networks complied by a CAN standard with an analog mixed-signal (AMS) simulator. Moreover, experimental trials are conducted to evaluate frame transmission of PoCAN. The simulation and experimental results show that the proposed PoCAN can achieve the simultaneous transmission of data and DC power in one-pair TP cables.