公开(公告)号：US20170227632A1

公开(公告)日：2017-08-10

申请号：US15501785

申请日：2015-08-07

Applicant: DENSO CORPORATION

Inventor： Takuya TAKAYAMA ,  Koji SHIMIZU

IPC: G01S13/34 ,  G01S13/95 ,  G01W1/14 ,  G01S13/58

CPC classification number: G01S13/34 ,  G01S7/354 ,  G01S7/40 ,  G01S7/412 ,  G01S13/345 ,  G01S13/584 ,  G01S13/931 ,  G01S13/95 ,  G01S2007/4039 ,  G01S2013/9342 ,  G01S2013/9346 ,  G01S2013/9357 ,  G01S2013/9375 ,  G01W1/14

Abstract: A radar device includes a transmission part that transmits a radar wave which has been frequency-modulated such that one measurement cycle has a rising section in which a frequency increases and a falling section in which a frequency decreases, a reception part that derives respective beat signals of the rising section and the falling section, and a signal processor that performs a precipitation determining process on the basis of an analysis of the beat signals. In the precipitation determining process, in the absence of objects other than precipitation objects from a transmission range of the radar wave, it is determined whether a spectral similarity of the frequency spectra of the rising and falling section with precipitation reference spectra is not less than a threshold, and if the spectral similarity is not less than the threshold as a result of the determination, it is determined that precipitation is present.

公开(公告)号：US20160124076A1

公开(公告)日：2016-05-05

申请号：US14895460

申请日：2014-06-03

Applicant: DENSO CORPORATION

Inventor： Hiroto NAKATANI ,  Koji SHIMIZU ,  Chiharu YAMANO

IPC: G01S7/40 ,  G01S13/93 ,  G01S13/34

CPC classification number: G01S7/4026 ,  G01S13/34 ,  G01S13/931 ,  G01S2007/4034 ,  G01S2013/9375

Abstract: A radar apparatus generates a spectrum distribution where frequencies in a beat signal are associated with intensities of respective frequency components. Based on a plurality of spectrum distributions generated over a predetermined number of measurement cycles prescribed in advance, the radar apparatus generates a reflection intensity distribution where frequencies are associated with road surface reflection intensities of the radar wave from a road surface at each frequency. In the reflection intensity distribution, the radar apparatus detects an intensity peak indicating a frequency that maximizes the road surface reflection intensity. Based on the detected intensity peak, the radar apparatus determines at least whether or not the radar apparatus is in an axis deviation state that is taken as a state where a reference axis of the radar apparatus has an inclination of not less than a prescribed angle in a vehicle height direction relative to a horizontal axis prescribed to a vehicle.

Abstract translation: 雷达装置产生频谱分布，其中拍频信号中的频率与相应频率分量的强度相关联。 基于在预先规定的预定数量的测量循环中生成的多个频谱分布，雷达装置产生反射强度分布，其中频率与每个频率处的来自路面的雷达波的路面反射强度相关联。 在反射强度分布中，雷达装置检测表示使路面反射强度最大化的频率的强度峰值。 基于检测到的强度峰值，雷达装置至少确定雷达装置是否处于作为雷达装置的基准轴具有不小于规定角度的倾斜度的状态的轴偏离状态 相对于车辆规定的水平轴的车辆高度方向。