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1. 发明授权

US06218929B1 Door entry control by wireless communication 失效
标题翻译：门禁控制通过无线通信
公开(公告)号：US06218929B1
公开(公告)日：2001-04-17
申请号：US09095155
申请日：1998-06-10
申请人： Noritoshi Furuta , Fumio Asakura , Hiroto Uesaka , Yuji Kato , Mitsugi Ohtsuka
发明人： Noritoshi Furuta , Fumio Asakura , Hiroto Uesaka , Yuji Kato , Mitsugi Ohtsuka
IPC分类号： G06F704
CPC分类号： G07C9/00309 , G07C2009/00357 , G07C2009/00793
摘要： In a vehicular entry control system, a code signal transmitter of a card carried by a driver modulates by a card-specific code a signal received from a transmitter/receiver of a control unit mounted in a vehicle and transmits the modulated signal to the control unit in return. The transmitter/receiver demodulates the modulated signal and a microcomputer automatically unlocks a vehicle door when the demodulated signal is correct indicating that the card is carried into a demodulating area. The microcomputer locks the door upon a driver's manual operation on a locking switch of the card. The microcomputer prohibits the automatic unlocking as long as the card is within the demodulating area after the locking in response to the manual operation.
摘要翻译：在车辆进入控制系统中，由驾驶员携带的卡的码信号发送器通过卡特定码调制从安装在车辆中的控制单元的发送器/接收器接收的信号，并将调制信号发送到控制单元作为回报。发射机/接收机解调调制信号，当解调信号正确表示卡被携带到解调区域时，微型计算机自动解锁车门。微型计算机在驾驶员的手动操作卡上锁定门锁。只要卡在响应于手动操作的锁定之后卡在解调区域内，微机就禁止自动解锁。

2. 发明授权

US06640090B1 Signal transmitter utilizing ask modulation wave 有权
标题翻译：信号发射机利用询问调制波
公开(公告)号：US06640090B1
公开(公告)日：2003-10-28
申请号：US09616371
申请日：2000-07-13
申请人： Takahide Kitahara , Mitsugi Ohtsuka , Noritoshi Furuta , Fumio Asakura
发明人： Takahide Kitahara , Mitsugi Ohtsuka , Noritoshi Furuta , Fumio Asakura
IPC分类号： H03C152
CPC分类号： H04B5/0012 , G07C9/00309 , G07C2209/06 , H04B5/0081
摘要： A synchronization circuit modulates a data signal with an amplitude shift keying (ASK) modulation method using an ASK modulation signal to output a modulated signal under the condition that the ASK modulation system and data signal are synchronized with each other. A drive circuit executes a push-pull operation based on the modulated signal and a resonance circuit resonates, under the push-pull operation of the drive circuit, to transmit a transmission signal in a radio wave. The synchronous signal controls a switching device to cut off a connection between the resonance circuit and the ground in synchronization with the modulated signal. Thereby, the transmission signal is generated sharply in the signal transmitter.
摘要翻译：同步电路利用ASK调制信号的幅移键控（ASK）调制方式对数据信号进行调制，在ASK调制方式和数据信号相互同步的条件下输出调制信号。驱动电路基于调制信号执行推挽操作，并且在驱动电路的推挽操作下，谐振电路谐振以在无线电波中发送发送信号。同步信号控制开关装置，以与调制信号同步地切断谐振电路和地之间的连接。从而，在信号发送器中产生急剧的发送信号。

3. 发明授权

US5733047A Enciphering system applicable to various keyless entry systems 失效
标题翻译：适用于各种无钥匙进入系统的加密系统
公开(公告)号：US5733047A
公开(公告)日：1998-03-31
申请号：US575136
申请日：1995-12-19
申请人： Noritoshi Furuta , Masahiro Goto
发明人： Noritoshi Furuta , Masahiro Goto
IPC分类号： E05B49/00 , B60R25/01 , B60R25/24 , E05B83/36 , G07C9/00 , G09C1/00 , H04L9/00 , H04L9/32 , H04K1/00
CPC分类号： B60R25/24 , B60R25/1003 , G07C9/00182 , H04L9/0625 , H04L9/3228 , H04L9/3271 , G07C2009/0023 , G07C2009/00253 , G07C2009/00769 , H04L2209/08 , H04L2209/84
摘要： An enciphering system comprises a transmitter (1) and a receiver (2) communicatable with each other and incorporated in a keyless entry system. The transmitter (1) comprises a memory (11) for memorizing an ID code, a first micro processor (12) for enciphering the ID code outputted from the memory (11), and a transmitting section (13) for transmitting an enciphered ID code produced by the first micro processor (12). The receiver (2) comprises a receiving section (22) for receiving the enciphered ID code transmitted from the transmitter (1) and a second micro processor (21) for decoding the enciphered ID code. The first micro processor (12) divides both the ID code and an associated rolling code into a plurality of blocks, the rolling code varying its content in response to each transmission of the ID code through the transmitting section (13), determines a repetition number for an enciphering arithmetic operation in a process of the arithmetic operation, and repeats the enciphering arithmetic operation in each block according to the repetition number, thereby enciphering the ID code. The second micro processor (21) decodes the enciphered ID code by reversely performing the operation of the first micro processor (12).
摘要翻译：一种加密系统包括可彼此通信并且并入无钥匙进入系统中的发射机（1）和接收机（2）。发送器（1）包括用于存储ID码的存储器（11），用于对从存储器（11）输出的ID码进行加密的第一微处理器（12），以及用于发送加密的ID码由第一微处理器（12）产生。接收器（2）包括用于接收从发送器（1）发送的加密ID码的接收部分（22）和用于对加密的ID码进行解码的第二微处理器（21）。第一微处理器（12）将ID代码和相关联的滚动代码两者分成多个块，滚动代码响应于通过发送部分（13）的ID代码的每次发送而改变其内容，确定重复数对于算术运算处理中的加密算术运算，根据重复次数重复每个块中的加密算术运算，从而加密ID码。第二微处理器（21）通过反向执行第一微处理器（12）的操作来解码加密的ID码。

4. 发明授权

US06225889B1 Method of producing rolling code and keyless entry apparatus using the same 失效
标题翻译：制造滚动码的方法和使用该方法的无钥匙进入装置
公开(公告)号：US06225889B1
公开(公告)日：2001-05-01
申请号：US08777979
申请日：1996-12-24
申请人： Noritoshi Furuta , Masahiro Goto
发明人： Noritoshi Furuta , Masahiro Goto
IPC分类号： B60R2510
CPC分类号： G07C9/00309 , B60R25/24 , G07C2009/00214 , G07C2009/00253 , G07C2009/00492
摘要： A rolling code producing method is provided which may be employed in a keyless entry system for automotive vehicles designed to compare a rolling code derived in a receiver installed in the vehicle and a rolling code derived in a portable transmitter to allow authorized access to the vehicle if both the rolling codes match. The rolling code producing method includes producing different rolling codes, in sequence, using an initial code variable according to a given algorithm and changing the initial code variable in response to insertion of an initial code variable memory card carried by a vehicle operator into the receiver.
摘要翻译：提供了一种滚动码产生方法，其可用于机动车辆的无钥匙进入系统，其被设计为将安装在车辆中的接收机中导出的滚动码与在便携式发射机中导出的滚动码进行比较，以允许授权接入车辆滚动代码都匹配。滚动码产生方法包括根据给定的算法依次使用初始码变量产生不同的滚动码，并且响应于由车辆操作员携带的初始码变量存储卡插入接收机而改变初始码变量。

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