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    • 11. 发明授权
    • Wireless IC card and IC card reader communication system
    • 无线IC卡和IC卡读卡器通信系统
    • US6021951A
    • 2000-02-08
    • US060674
    • 1998-04-15
    • Hisashi Nishikawa
    • Hisashi Nishikawa
    • G06K17/00G06K7/00G06K19/07H04B5/02G06K19/06
    • G06K19/0723G06K7/0008
    • In the present wireless card system of the present invention, when data is transmitted from an IC card to a card reader, the IC card changes the load imposed on the transmission system in accordance with the contents of the data, and the card reader detects a reflected wave, which is generated in accordance with a change in the load, and identifies the data. The reflected wave is not a wave emitted by the IC card into the atmosphere, but is an alternating current that relies on the load condition in the transmission system between the transmitter and the receiver, and that is returned from the load in the transmission system. Thus, the reflected wave is not easily affected by the noise field in the vicinity of the antenna, and more precise data transmission is possible.
    • 在本发明的本无线卡系统中,当从IC卡向读卡器发送数据时,IC卡根据数据的内容改变施加在传输系统上的负载,并且读卡器检测到 反射波,其根据负载的变化而生成,并且识别数据。 反射波不是由IC卡发射到大气中的波,而是依赖于发射机和接收机之间的传输系统中的负载状态并且在传输系统中从负载返回的交流电。 因此,反射波不容易受到天线附近的噪声场的影响,更精确的数据传输是可能的。
    • 15. 发明申请
    • ROTATION ANGLE DETECTION DEVICE, AND ROTATION ANGLE DETECTION METHOD
    • 旋转角度检测装置和旋转角度检测方法
    • US20110199075A1
    • 2011-08-18
    • US13122759
    • 2009-09-29
    • Hiroyoshi KojimaMasashi MureHisashi Nishikawa
    • Hiroyoshi KojimaMasashi MureHisashi Nishikawa
    • G01B7/30
    • G01D5/244
    • A rotation angle detection device includes: a detection portion that detects detection angle that univocally corresponds to rotation angle of a rotating body which is within a predetermined range, wherein the detection angle linearly increases from a minimum value to a maximum value as the rotation angle increases within a unit range, and the detection angle changes from the maximum value to the minimum value or from the minimum value to the maximum value at a boundary between unit ranges that are adjacent to each other; and a correction portion that corrects the detection angle so that the detection angle detected in the predetermined range has linear characteristics, if the boundary between the unit ranges is contained in the predetermined range.
    • 旋转角度检测装置包括:检测部,其检测与旋转体的旋转角度一致的检测角度,该旋转角度在预定范围内,其中,随着旋转角度增加,检测角度从最小值线性增加到最大值 在单位范围内,检测角度从相邻的单位范围的边界处的最大值到最小值或从最小值到最大值变化; 以及如果单位范围之间的边界包含在预定范围内,校正检测角度使得在预定范围内检测到的检测角度具有线性特性的校正部分。