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    • 42. 发明授权
    • Antenna device and wireless communication device using same
    • 天线设备和使用其的无线通信设备
    • US07068237B2
    • 2006-06-27
    • US10903186
    • 2004-07-30
    • Junichi Fukuda
    • Junichi Fukuda
    • H01Q21/12
    • H01Q25/00H01Q3/24H01Q21/061H01Q21/22
    • An antenna device is provided which is capable of dealing with two or more frequencies or of carrying out communications using two or more communication methods by a single antenna and of controlling its directivity and, therefore, of achieving improvements in communication performance of the antenna device. The antenna device is so constructed that its shape is freely changed and its directivity can be changed to deal with a signal in any frequency band. The antenna device is made up of two or more antenna elements and switches which put each of the antenna elements into a connected or disconnected state. By controlling the switches, a shape of the antenna is changed so as to have a 90-degree bent dipole configuration to provide directivity, and a length of the antenna is changed so as to allow a changeover of a frequency band. The antenna device has a reflector being similar to the dipole-type antenna, which enables improvements in its directivity.
    • 提供一种能够处理两个或更多个频率或者通过单个天线使用两种或多种通信方法进行通信并且控制其方向性并因此实现天线装置的通信性能的改进的天线装置。 天线装置被构造成使得其形状可以自由地改变,并且其方向性可以被改变以处理任何频带中的信号。 天线装置由两个或更多个天线元件和开关构成,其将每个天线元件置于连接或断开状态。 通过控制开关,改变天线的形状以具有90度弯曲偶极配置以提供方向性,并且改变天线的长度以允许频带的切换。 天线装置具有类似于偶极天线的反射器,其能够改善其方向性。
    • 45. 发明授权
    • Collision detector for a vehicle
    • 车辆碰撞探测器
    • US4873452A
    • 1989-10-10
    • US247559
    • 1988-09-22
    • Makie MorotaJunichi Fukuda
    • Makie MorotaJunichi Fukuda
    • G01P15/00B60R21/00B60R21/01B60R21/16G01R31/00
    • B60R21/01332B60R21/0132G01R31/006
    • It is an object of the present invention to provide a collision detector for a vehicle, capable of avoiding the adverse effect of the diagnostic pulses on the detection of a collision so that the failure of the acceleration sensor can be diagnosed correctly. A collision detector in accordance with the present invention comprises a diagnostic pulse generator which applies diagnostic pulses to an acceleration sensor to detect the failure of the acceleration sensor, and a diagnostic circuit which stops the output diagnostic pulses of the diagnostic pulse generator when the output of the acceleration sensor exceeds a malfunction avoidance level which is lower than a reference collision level.
    • 本发明的目的是提供一种用于车辆的碰撞检测器,其能够避免诊断脉冲对碰撞检测的不良影响,从而可以正确地诊断加速度传感器的故障。 根据本发明的碰撞检测器包括:诊断脉冲发生器,其向加速度传感器施加诊断脉冲以检测加速度传感器的故障;以及诊断电路,当诊断脉冲发生器的输出停止时,停止诊断脉冲发生器的输出诊断脉冲 加速度传感器超过低于参考碰撞水平的故障回避水平。