公开(公告)号：US4361904A

公开(公告)日：1982-11-30

申请号：US170046

申请日：1980-07-17

申请人： Akira Matsumura

发明人： Akira Matsumura

IPC分类号： H04B1/50 ,  H04B17/00 ,  H04L27/02

CPC分类号： H04B17/19

摘要： An ultra high frequency transceiver which transmits a modulated carrier wave and mixes a received signal with a locally generated signal to produce an intermediate frequency signal is tested by using the same transmitter as used during normal transceiver operation and by modulating the carrier with a wave having sudden transitions. A portion of the transmitted wave is reflected back to a receiver segment of the transmitter to produce an i.f. signal that is detected by a demodulator. Each transition causes the demodulator to detect a pulse signal. In response to the pulse signal being detected and not being detected during a testing interval, indications are derived to signal that the transceiver is and is not operating properly, respectively.

摘要翻译： 通过使用与在正常收发器操作期间使用的相同的发射机并且通过用突发的波调制载波来测试传输调制载波并将接收的信号与本地产生的信号混合以产生中频信号的超高频收发器 转换 发射波的一部分被反射回到发射机的接收机段，以产生i.f. 信号由解调器检测。 每个转换使解调器检测脉冲信号。 响应于在测试间隔期间检测到并且未被检测的脉冲信号，导出指示以分别收发器正在和不正常地操作的信号。

公开(公告)号：US4316173A

公开(公告)日：1982-02-16

申请号：US156814

申请日：1980-06-05

申请人： Akira Matsumura ,  Akira Endo ,  Kenji Sekine

发明人： Akira Matsumura ,  Akira Endo ,  Kenji Sekine

IPC分类号： G01S7/40 ,  G01S13/60

CPC分类号： G01S7/4004 ,  G01S13/60 ,  B60G2400/82 ,  B60G2400/821 ,  B60G2401/174 ,  B60G2500/30 ,  B60G2600/044

摘要： A vehicle speed sensing apparatus with means for checking its operation comprises a Doppler radar unit for producing a Doppler signal related to a vehicle speed and producing a speed signal from the Doppler signal, a first section for extracting low frequency components in the Doppler signal and a second section connected with the first section for producing an operation check signal. The extracted low frequency components correspond to vertical motion of the vehicle and are considerably lower than a Doppler signal frequency which corresponds to a minimum vehicle speed. If these low frequency components corresponding to vertical motion are not present, it is an indication that the speed sensing system is not operating properly.

摘要翻译： 具有用于检查其操作的装置的车速检测装置包括：多普勒雷达单元，用于产生与车速相关的多普勒信号并从多普勒信号产生速度信号;第一部分，用于提取多普勒信号中的低频分量;以及 第二部分与第一部分连接以产生操作检查信号。 提取的低频分量对应于车辆的垂直运动，并且远低于对应于最小车速的多普勒信号频率。 如果不存在对应于垂直运动的这些低频分量，则表示速度感测系统不能正常工作。