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    • 45. 发明申请
    • Absolute angular position sensing system based on radio frequency identification technology
    • 基于射频识别技术的绝对角位置传感系统
    • US20080272926A1
    • 2008-11-06
    • US11743806
    • 2007-05-03
    • Qi Ma
    • Qi Ma
    • G08B21/00
    • G01S13/825G01B7/30G01S13/88
    • A system for determining the position of a rotating wheel using RFID. In one embodiment, the system includes a position sensing wheel mounted to one or both of a crankshaft and a camshaft in the engine. A plurality of RFID tags are disposed at predetermined intervals around the wheel, and an RFID transceiver is positioned proximate the wheel. As the wheel rotates, the RFID transceiver transmits a signal that interrogates the RFID tags, which then transmit a coded signal to the transceiver identifying the wheel's position relative to the transceiver. Therefore, regardless of the position of the wheel, the RFID transceiver can interrogate the closest RFID tag and immediately know the position of the engine so that an engine controller can provide fuel and spark to the cylinders as soon as possible.
    • 一种使用RFID确定旋转轮的位置的系统。 在一个实施例中,系统包括安装在发动机中的曲轴和凸轮轴中的一个或两个的位置传感轮。 多个RFID标签围绕车轮以预定的间隔设置,并且RFID收发器位于车轮附近。 当轮转动时,RFID收发器发送询问RFID标签的信号,RFID标签然后将编码的信号发送到收发器,该信号识别相对于收发器的车轮位置。 因此,无论车轮的位置如何,RFID收发器都可以询问最近的RFID标签,并立即知道发动机的位置,以便发动机控制器可以尽可能快地向气缸提供燃料和火花。