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    • 2. 发明授权
    • Radar apparatus for detecting a distance/velocity
    • 用于检测距离/速度的雷达装置
    • US5677695A
    • 1997-10-14
    • US560697
    • 1995-11-20
    • Hiroshi SuzukiMasayoshi ShonoOsamu Isaji
    • Hiroshi SuzukiMasayoshi ShonoOsamu Isaji
    • G01S7/288G01S7/35G01S7/40G01S13/34G01S13/58G01S13/42G01S13/93
    • G01S13/584G01S13/34G01S7/35G01S7/354G01S7/4004G01S13/345G01S2007/356G01S7/352
    • A radar apparatus for detecting a distance/velocity has a transmitting system for transmitting a signal which is frequency-modulated with a modulating signal having a predetermined recurrence frequency, a receiving system for receiving a reflected wave signal, which is the modulated transmission signal transmitted from the transmitting system and reflected by an object, and which mixes the reflected wave signal and the modulated transmission signal from the transmitting system so as to detect a beat wave signal of the reflected wave signal and the modulated transmission signal. The apparatus also includes a high-pass filter for filtering the beat wave signal detected in the receiving system so as to cut off modulation frequency components of the modulated transmission signal with orders that are equal to or lower than a predetermined order, and a distance/velocity calculating unit which calculates the distance to and the relative velocity with respect to the object based on frequency information in the beat wave signal which has been passed through the high-pass filter. Accordingly, the radar apparatus effectively removes FM/AM conversion (reconversion) noise in a simple structure thereby to accurately detect the distance to and the relative velocity with respect to the object even with low transmitting power.
    • 用于检测距离/速度的雷达装置具有用于发送用具有预定重复频率的调制信号进行频率调制的信号的发送系统,用于接收反射波信号的接收系统,该反射波信号是从 发送系统并且由对象反射,并且将来自发送系统的反射波信号和调制的发送信号进行混合,以便检测反射波信号和调制的发送信号的搏动波信号。 该装置还包括用于对在接收系统中检测到的拍频信号进行滤波的高通滤波器,以便以等于或低于预定顺序的次序切断调制的发送信号的调制频率分量, 速度计算单元,其基于已经通过高通滤波器的拍频信号中的频率信息来计算相对于对象的距离和相对速度。 因此,雷达装置以简单的结构有效地去除了FM / AM转换(再转换)噪声,从而即使在低发射功率下也能够精确地检测相对于物体的距离和相对速度。