Method and device for determining surface condition of carriageway in aid of combination of acoustic and electromagnetic wide-angle sensing device

A lane and acoustic technology, applied in the field of devices for measuring lane properties, can solve problems such as insufficient, and achieve the effect of reducing the harm of ambiguity and reliable measurement results

Inactive Publication Date: 2012-09-19
ROBERT BOSCH GMBH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

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 device for determining surface condition of carriageway in aid of combination of acoustic and electromagnetic wide-angle sensing device
  • Method and device for determining surface condition of carriageway in aid of combination of acoustic and electromagnetic wide-angle sensing device
  • Method and device for determining surface condition of carriageway in aid of combination of acoustic and electromagnetic wide-angle sensing device

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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 present invention relates to a device for measuring the condition of a carriageway (4), comprising an acoustic measuring means (6, 8) for determining at least one acoustic reflection coefficient (13) from an amplitude relationship and / or phase relationship of an acoustic wave (10) emitted by the acoustic measuring means (6, 8) and of the acoustic wave (12) reflected by the carriageway (4),and comprising an electromagnetic measuring means (14, 16) for determining at least one electromagnetic reflection coefficient (22) from an amplitude relationship and / or phase relationship from an electromagnetic wave (18) emitted by the electromagnetic measuring means (14, 16) and from the electromagnetic wave (20) reflected by the carriageway (4). The device is designed to determine the condition (26) of the carriageway (4) on the basis of the at least one acoustic and the at least one electromagnetic reflection coefficient (13, 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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IPC IPC(8): G01B21/30G01B17/08G01B15/08B60W40/06
CPCB60W2420/60B60W40/068G01S15/89G01S15/876G01S13/003G01N29/075G01S7/539G01S13/878G01N29/11B60W2420/54G01S13/862B60W40/064B60W2420/52G01N29/00G01S7/41G01S15/003B60W2420/50B60W2420/408G01B15/08G01B17/08
InventorA·牛伯特
OwnerROBERT BOSCH GMBH