公开(公告)号：US4035765A

公开(公告)日：1977-07-12

申请号：US695647

申请日：1976-06-14

申请人： Lance E. Wenner ,  John R. Brassfield

发明人： Lance E. Wenner ,  John R. Brassfield

IPC分类号： B60R25/10 ,  G08B13/22

摘要： A theft alarm is provided for use in conjunction with vehicular mounted radio equipment, such as the popular but too frequently stolen citizens' band transceivers, which is responsive to either physical separation of the equipment being protected from the common electrical ground provided by the chassis of the vehicle or disconnection from such equipment of the cable by which it is normally coupled with an antenna mounted on the same vehicle. In order to permit locating and/or coupling the alarm circuit components with the equipment at points remote from the latter, so that the alarm portion of the system may be in a protected location or its presence not revealed by "extra" wires leading directly to the equipment or both, and in order that the alarm may function reliably and immediately in response to an attempted theft without adversely affecting the transmission of radio frequency signals between the equipment and the antenna and without possible impairment of the functioning of the alarm due to spurious electrical paths, the cable for connecting the equipment to the antenna is electrically separated into two sections at a zone intermediate its length, at which zone each conductor of one section is capacitatively coupled with the corresponding conductor of the other section, and the alarm controlling circuit is then coupled between the common ground and one of the conductors of the section of the antenna cable electrically adjacent to the equipment to be protected.

摘要翻译： 盗窃警报器提供与车载无线电设备一起使用，例如受欢迎但太频繁被盗的公民频带收发器，其响应于被保护的设备的物理分离与由底盘提供的公用电气接地 车辆或与其通常与安装在同一车辆上的天线耦合的电缆的这种设备断开连接。 为了允许将报警电路部件与设备在远离后者的位置定位和/或耦合，使得系统的报警部分可能处于受保护的位置或其存在不被直接引导到 设备或两者，并且为了响应于企图窃取而使报警器可靠地立即运行而不会不利地影响设备和天线之间的射频信号的传输，并且不会由于伪造而损坏报警器的功能 电气路径，用于将设备连接到天线的电缆在其长度之间的区域处电分离成两个部分，在该区域，一个部分的每个导体与另一部分的相应导体电容耦合，并且报警控制电路 然后耦合在公共地和天线电缆部分的一个导线之间 靠近要保护的设备。

公开(公告)号：US4743908A

公开(公告)日：1988-05-10

申请号：US794787

申请日：1985-11-04

申请人： John R. Brassfield ,  Roger A. Jones ,  Edward W. Sergent ,  Joseph C. Winkler

发明人： John R. Brassfield ,  Roger A. Jones ,  Edward W. Sergent ,  Joseph C. Winkler

IPC分类号： G01S13/52 ,  G01S13/58 ,  G01S9/02

CPC分类号： G01S13/583 ,  G01S13/52

摘要： A traffic radar unit capable of looking past the lead vehicle of oncoming traffic and discovering and identifying a violator employs master and slave antennas having diverging boresights that provide overlapping relative power density radiation patterns. The radar return signal from a target of interest is received by each antenna to produce two independent Doppler signals of the same frequency which are processed by respective master and slave signal processing channels. In the illustrated embodiment, a reference boresight is established in the overlapped patterns such that a target position along the reference boresight occurs at the time that the amplitudes of the two Doppler signals are equal. Controllable high pass filters whose passbands are shifted upwardly in response to return signals of increasing amplitude attenuate stronger, lower frequency interfering signals. The presence of a second Doppler signal in either channel having a frequency near the signal of interest causes the receiver to abort the tracking mode.

摘要翻译： 能够观察迎面而来的交通事故的发现和识别违规者的交通雷达单元采用具有提供重叠的相对功率密度辐射模式的分支视轴的主从天线。 来自感兴趣的目标的雷达返回信号由每个天线接收以产生由相应的主信号处理和从属信号处理信道处理的相同频率的两个独立的多普勒信号。 在所示实施例中，在重叠图案中建立参考视轴，使得在两个多普勒信号的幅度相等时沿着参考视轴的目标位置发生。 通过响应增加振幅的返回信号，其通带向上移位的可控高通滤波器衰减更强的较低频干扰信号。 在具有接近感兴趣信号的频率的任一信道中存在第二多普勒信号导致接收机中止跟踪模式。