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Method and apparatus for determining surface properties of a roadway by means of a combined acoustic and electromagnetic wide-angle sensing arrangement

A lane and property technology, which is applied in the field of devices for measuring the properties of lanes, can solve problems such as insufficiency, and achieve the effect of reducing the harm of ambiguity and reliable measurement results

Inactive Publication Date: 2017-03-01
ROBERT BOSCH GMBH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, all of these systems only conditionally determine the properties of the roadway surface with the aid of active sensors, since the parameters measured by these systems and the boundary conditions thus provided have hitherto been insufficient for an unambiguous description of the roadway surface, resulting in Ambiguity about the nature of lanes

Method used

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  • Method and apparatus for determining surface properties of a roadway by means of a combined acoustic and electromagnetic wide-angle sensing arrangement
  • Method and apparatus for determining surface properties of a roadway by means of a combined acoustic and electromagnetic wide-angle sensing arrangement

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Embodiment Construction

[0023] Such as figure 1 As shown in , the device 2 according to the invention for measuring properties of a roadway 4 has an acoustic measuring device 6 which preferably comprises an ultrasonic transmitter 6 and an ultrasonic sensor 8 . The ultrasonic transmitter 6 transmits ultrasonic waves 10 as sound waves, which are reflected by the roadway 4 and received by the ultrasonic sensor 8 as reflected ultrasonic waves 12 . Ultrasonic sensor 8 then determines acoustic reflection coefficient 13 from the amplitude and / or phase ratio of emitted ultrasonic waves 10 and reflected ultrasonic waves 12 . Furthermore, the device 2 according to the invention has an electromagnetic measuring device which preferably comprises a radar transmitter 14 and a radar sensor 16 . Radar transmitter 14 transmits radar waves 18 as electromagnetic waves, which are reflected by roadway 4 and received by radar sensor 16 as reflected radar waves 20 . Radar sensor 16 then determines electromagnetic reflect...

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Abstract

The invention relates to a device for measuring properties of a roadway (4), an acoustic measuring device (6, 8) and an electromagnetic measuring device (14, 16), the acoustic measuring device being used by the acoustic measuring device (6 , 8) the amplitude ratio and / or the phase ratio of the emitted sound wave (10) and the sound wave (12) reflected by the roadway (4) to determine at least one acoustic reflection coefficient (13), the electromagnetic measuring device is used to determine the acoustic reflection coefficient (13) by the electromagnetic measuring device An amplitude ratio and / or a phase ratio of electromagnetic waves (18) emitted by (14, 16) and electromagnetic waves (20) reflected by the roadway (4) to determine at least one electromagnetic reflection coefficient (22). The device is configured to determine a property (26) of the roadway (4) on the basis of at least one acoustic reflection coefficient (13) and at least one electromagnetic reflection coefficient (22).

Description

technical field [0001] The invention relates to a device for measuring the properties of a roadway, a safety and / or driver assistance system, a vehicle and a method for measuring the properties of a roadway. Background technique [0002] The safety and driver assistance systems maintain the vehicle even in poor road conditions while driving in the lane specified by the driver. These systems respond in a known manner to torques and forces in contact with the wheels, measured for example by means of acceleration sensors, thereby determining deviations from a given lane of the vehicle and, if necessary, guiding the vehicle back into this given lane superior. [0003] In order to improve the control behavior of safety and driver assistance systems, it has been proposed to determine the surface properties of the roadway, whereby the safety and driver assistance systems can intervene preventively in the driving behavior of the vehicle. For example, by detecting a thin layer of i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/07G01N29/11G01S7/41G01S7/539G01S13/00G01S13/86G01S13/87G01S15/00G01S15/87B60W40/064B60W40/068
CPCB60W40/064B60W40/068B60W2420/50B60W2420/54B60W2420/60G01N29/075G01N29/11G01S7/41G01S7/539G01S13/003G01S13/862G01S13/878G01S15/003G01S15/876B60W2420/408G01B15/08G01B17/08
Inventor A·牛伯特
Owner ROBERT BOSCH GMBH
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