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Method for operating radar sensor in motor vehicle, radar sensor and motor vehicle

A radar sensor and motor vehicle technology, applied in the field of radar sensors, can solve problems such as limited time resolution

Pending Publication Date: 2021-12-28
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Since the angular resolution depends on the aperture size and thus on the length of the track traversed in one measurement cycle (the length is in its aspect proportional to the product of the driving speed and time), in SAR with high angular resolution Temporal resolution is necessarily limited in analytical processing

Method used

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  • Method for operating radar sensor in motor vehicle, radar sensor and motor vehicle
  • Method for operating radar sensor in motor vehicle, radar sensor and motor vehicle
  • Method for operating radar sensor in motor vehicle, radar sensor and motor vehicle

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Embodiment Construction

[0029] exist figure 1 , in a Cartesian coordinate system with an x-axis and a y-axis, a motor vehicle 10 traveling at a constant speed in the direction of the x-axis is shown at three different times, in which the motor vehicle is respectively occupy different positions x1, x2, x3 along the x-axis. Stationary object 12 is at a coordinate position (x0, y0) on the side of the trajectory traveled by vehicle 10 . On the right front, vehicle 10 has a radar sensor 14 , shown only schematically here, whose positioning angle range 16 covers not only the space in front of vehicle 10 but also the space lying to the side of the vehicle in the direction of the y-axis. (The mirrored sensor on the other side of the vehicle is not shown here).

[0030]Object 12 is localized by radar sensor 14 at each of positions x1 , x2 , x3 at different localization angles α1 , α2 , α3 . Here, the positioning angles α1 to α3 are respectively defined as the angles between the line of sight from the rada...

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Abstract

The invention relates to a method for operating a radar sensor (14) in a motor vehicle (10). In the method, under an SAR measurement mode, objects, including stationary objects (12), are localized with high angular resolution according to the principle of synthetic aperture. The method is characterized in that the same radar sensor (14) is operated in the SAR measurement mode and in a Doppler measurement mode in which the relative speed of objects, including moving objects, is measured at a temporal resolution that is greater than the temporal resolution in the SAR measurement mode, in a time-shifted or simultaneous manner.

Description

technical field [0001] The invention relates to a method for operating a radar sensor in a motor vehicle, in which method objects, including stationary objects, are localized with high angular resolution in SAR measurement mode on the basis of the synthetic aperture principle. Background technique [0002] Radar systems for measuring distances, relative speeds and positioning angles of objects are used in motor vehicles for various assistance functions, for example for safety functions (such as automatic collision warning or collision avoidance) and for comfort functions (such as automatic search parking space). An example of a method for operating a SAR radar sensor in a motor vehicle is described in DE 199 12 370 A1. [0003] The synthetic aperture principle allows a particularly precise angular measurement of the radar sensor's own motion by combining the radar measurements at different partial positions with one another in such a way that a large antenna aperture is pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/931G01S13/90G01S13/58B60R11/00
CPCG01S13/931G01S13/90G01S13/583B60R11/00B60R2011/008G01S13/9041G01S13/584G01S2013/0272G01S13/9029G01S13/60G01S13/524G01S13/58G01S7/40G01S13/34G01S2013/9327G01S13/9017
Inventor D·申德勒G·哈科拜恩J·芬克K·彭斯克M·朔尔A·希默尔施托斯
Owner ROBERT BOSCH GMBH