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Method and apparatus for detecting contact between driver's hands and steering wheel of vehicle

Active Publication Date: 2013-12-04
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to this patent document, such a proximity switch requires an additional electrode which can generally be integrated in the heating wire of the steering wheel heater
However, steering wheel heaters are not a particularly common equipment feature for motor vehicles
Also, capacitive sensors are generally relatively unreliable, and often cannot determine whether the hand is actually in contact with the steering wheel or whether the hand is only in the vicinity of the latter

Method used

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  • Method and apparatus for detecting contact between driver's hands and steering wheel of vehicle
  • Method and apparatus for detecting contact between driver's hands and steering wheel of vehicle

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Experimental program
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Embodiment Construction

[0028] according to figure 1 , a typical steering system of a motor vehicle with electromechanical steering force assistance has a steering wheel 12 that converts a rotation of the steering wheel 12 into a translational movement of a steering rod 18 via a steering gear 16 in a known manner, as a result of which a steering force F is applied L and at speed Deflection of steering rod 18 distance x z . The steering movement is assisted by an electric motor 14 placed near the steering gear 16 , powered by a vehicle battery 20 and can be controlled in a continuously variable manner by an electronic control unit (ECU) 10 .

[0029] Especially based on the current steering wheel torque M L , absolute steering wheel angle and steering wheel angular velocity δ L , The sensor parameters realize the control; the corresponding sensor system is denoted by 22 . Steering wheel angular velocity is usually not measured directly Instead, by differentiating from the steering wheel angl...

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Abstract

In a method for detecting contact between a driver's hands and the steering wheel (12) of a vehicle, an actuator (14) for selectively applying a steering force and sensors (22) for measuring the instantaneous steering force and / or the steering angle being associated with the steering wheel (12), the actuator (14) impresses (32) a test force pulse pattern on the steering wheel (12). The steering force sensor and / or the steering angle sensor (22) measure(s) the reaction of the steering wheel movement to the test pulse pattern, and the reaction of the steering wheel movement is used to decide whether or not at least one of the driver's hands is in contact with the steering wheel (12).

Description

technical field [0001] The present invention relates to a method and device for detecting hand contact with the steering wheel of a motor vehicle. Background technique [0002] The detection of the presence or absence of contact between the driver's hands and the steering wheel is simply referred to as "hands-on-off" detection, considering the increasing popularity of complex driver assistance systems (such as case), this detection becomes increasingly important. These systems are intended only to assist the driver, but are not designed to replace a driver who no longer has any control of the vehicle, especially if the driver has released the vehicle's steering wheel. However, thanks to the assistance system, the driver in particular cannot resist letting go of the steering wheel in this way. [0003] For safety reasons, it must therefore be checked whether at least one hand of the driver is in contact with the steering wheel so that, if necessary, manual intervention is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B62D113/00
CPCB62D15/025B60W40/08B62D15/00B60K28/02B62D1/04B62D6/00
Inventor 约瑟夫·安德里亚斯·乌尔哈恩
Owner FORD GLOBAL TECH LLC
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