公开(公告)号：US4761644A

公开(公告)日：1988-08-02

申请号：US870193

申请日：1986-06-03

申请人： Taneichi Kawai ,  Yuichi Murakami

发明人： Taneichi Kawai ,  Yuichi Murakami

IPC分类号： G07C9/00 ,  H04Q1/00

CPC分类号： G07C9/00182 ,  G07C2009/00793

摘要： A control over data transmission and reception which is utilized in remotely controlled electronic vehicle lock system. During the standby mode, the power dissipation in a receiver is reduced to a required minimum level, while when a radio wave is received, the supply of power is automatically switched to enable the receiver for its proper functioning. A transmitter delivers a carrier for a given time interval in response to a switch being turned on, and then transmits a modulated wave which includes a switch code and an identification code. By utilizing a frequency modulation, the presence or absence of a wave being received is determined in accordance with noise level which appears at the demolulator output. When the presence of a wave being received is determined, the supply of power is switched, and is then maintained for a given time interval.

摘要翻译： 用于遥控电子车辆锁定系统中的数据传输和接收控制。 在待机模式期间，接收机的功耗降低到所需的最小电平，而当接收到无线电波时，自动切换电力供应，以使接收机正常工作。 发射机响应于开关被接通而递送给定时间间隔的载波，然后发送包括开关码和识别码的调制波。 通过利用频率调制，根据出现在拆卸器输出端的噪声电平来确定接收到的波的存在或不存在。 当确定接收到波的存在时，切换电力供应，然后将其维持给定的时间间隔。