METHOD FOR DELIVERING A WARNING OF A HAZARDOUS ROAD SURFACE STATE AND APPARATUS

• US 20150179067A1
• Filed: 12/23/2014
• Published: 06/25/2015
• Est. Priority Date: 12/23/2013
• Status: Abandoned Application

• Current Assignee: Hella KGaA Hueck & Company
• Original Assignee: Hella KGaA Hueck & Company
• Inventors: THUN, Carsten, MORISSE, Ole
• Application Number:
  US14/581,419
• Publication Number:
  US 20150179067A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60Q 9/00 Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00 , e.g. haptic signalling
• CPC Class Codes: B60W 2050/146 Display means
• CPC Class Codes: B60W 2420/40 Photo, light or radio wave sensitive means, e.g. infrared sensors
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 40/06 Road conditions
• CPC Class Codes: E01C 11/24 Methods or arrangements for preventing slipperiness or protecting against influences of the weather measures taken in connection with the foundation E01C3/06; paving elements with anti-slip inlays E01C5/22; aggregates resisting to grinding E01C7/085, E01C7/142, E01C7/182; specially for surface layers E01C7/35; reinforcements extending up to the surface E01C11/16, E01C11/18, E01C11/185; drainage E01C11/22; windscreens E01F7/02; snow fences E01F7/02; combating fog E01H13/00
• CPC Class Codes: G08G 1/0962 having an indicator mounted inside the vehicle, e.g. giving voice messages
• CPC Class Codes: G08G 1/0967 Systems involving transmission of highway information, e.g. weather, speed limits transmission of navigation instructions to the vehicle G08G1/0968

Abstract

In a method for delivering a warning of a hazardous road surface state for application in a travelling motor vehicle in which the air temperature is measured, a targeted prediction of the road surface state is to be made so that the output of a warning can be avoided in many cases in which such a warning was not objectively justified. This is achieved by means of a contactless measurement method by which means the moisture of the road surface is determined and by means of which the temperature of the road surface is determined where a value describing the road surface state is determined taking into account these three measured values. The warning is then delivered depending on the value describing the road surface state.

Claims

1. Method for delivering a warning of a hazardous road surface state for application in a travelling motor vehicle in which the air temperature is measured, wherein,

that the moisture of the road surface is determined by means of a contactless measurement method,

that the temperature of the road surface is determined by means of a contactless measurement method,

that a value describing the road surface state is determined taking into account these three measured values and

that the warning is delivered depending on the value describing the road surface state.

2. The method according to claim 1, wherein the moisture of the road surface is measured by means of a capacitive method.

3. The method of claims 1, wherein the temperature of the road surface is measured by means of a thermophilic measuring element.

4. The method according to Claim 1, wherein the temperature of the road surface is measured by means of an infrared sensor.

5. The method according to Claim 1, wherein the three measured values are each subjected to a signal processing before the value describing the road surface state is determined from the three measured values.

6. The method according to Claim 1, wherein a vehicle speed is taken into account when determining the value describing the road surface state.

7. The method according to Claim 1, wherein a wiper signal is taken into account when determining the value describing the road surface state.

8. The method according to Claim 1, wherein an ESP control is taken into account when determining the value describing the road surface state.

9. The method according to claim 1, wherein the delivered warning additionally contains information on an adhesion state of the road.

10. An apparatus for delivering a warning of a hazardous road surface state, in particular for carrying out the method according to claim 1 comprising a temperature measuring device for measuring the air temperature,

wherein, the apparatus comprises a sensor for measuring the moisture of the road surface,

the apparatus comprises a sensor for measuring the temperature of the road surface, and the apparatus comprises a data processing device which is intended and designed to determine a value describing the road surface state from the measurement data and to initiate a warning resulting therefrom.

11. The apparatus according to claim 10, wherein the sensor for measuring the moisture of the road surface is a capacitive sensor.

12. The apparatus according to claim 11, wherein the capacitive sensor is disposed in the bottom area of the vehicle.

13. The apparatus according to claim 10, wherein at least two capacitive sensors are disposed adjacent to one another transversely to the vehicle longitudinal axis.

14. The apparatus according to claim 10, wherein the sensor for measuring the temperature of the road surface is an infrared sensor which detects infrared radiation emanating from the road.

15. The apparatus according to claim 14, wherein the infrared sensor is disposed in the bottom area of the motor vehicle.

16. A motor vehicle having an apparatus according to claim 10.