Method for detecting contact with a manually activated steering device, in particular a vehicle steering wheel, and a device for carrying out the method
A kind of equipment and actuating technology, applied in the direction of steering control, steering control, steering mechanism, etc. installed on the vehicle, can solve the problem of increased assembly cost and achieve cost-effective, high reliability and/or precision effects
Pending Publication Date: 2021-01-15
ZF汽车安全德国有限公司
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Problems solved by technology
However, it is technically difficult to achieve such position determination
For this, additional lines and components are generally required, and the assembly effort is significantly increased
Method used
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Embodiment Construction
[0043] A device for detecting contact with a manually actuated steering or control device is described below using the example of a steering wheel of a vehicle.
[0044] According to a first embodiment of the device, in the circle of the steering wheel, as in figure 1 Shown symbolically in , a first conductor arrangement 10 with two parallel-running electrical conductors 12 , 14 is arranged. More precisely, the conductor mechanism 10 is arranged below the decorative surface of the steering wheel, for example below the leather covering.
[0045] The conductor arrangement extends over the entire circumference or at least a major portion of the steering wheel rim. Alternatively, a plurality of such conductor arrangements 10 are provided, which are each arranged in subregions of the steering wheel rim. Furthermore, a plurality of conductor arrangements 10 may be distributed over the annular circumference of the steering wheel rim.
[0046] The two conductors 12, 14 are provided w...
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A method for detecting contact with a manually activated steering or control device, in particular a vehicle steering wheel, comprises the following steps: applying an alternating voltage to at leastone conductor arrangement (10) which is arranged on the steering or control device, and has at least one conductor line with a significant ohmic resistance; determining the current profile in the conductor arrangement (10); determining the real component and the virtual component of the instantaneous alternating current resistance of the conductor arrangement (10); determining the capacitance or the change in capacitance of the conductor arrangement (10); determining the phase shift; and evaluating the determined values. A device for carrying out the method comprises a steering or control device, in particular a vehicle steering wheel, a conductor arrangement (10) which is arranged on the steering or control device and which has at least one conductor line with a significant ohmic resistance, and a control and evaluation device which is configured to apply an alternating voltage to the conductor arrangement (10), to measure the current profile in the conductor arrangement (10) and to evaluate the determined values.
Description
technical field [0001] The invention relates to a method for detecting contact with a manually actuated steering or control device, in particular a steering wheel of a vehicle. The invention also relates to a device for carrying out the method. Background technique [0002] Knowing whether the driver of a vehicle is touching the steering wheel is essential or at least useful information for various safety and driver assistance systems. In principle, there are various technical possibilities as to how contact with the steering wheel can be detected. Devices in which capacitive or resistive sensors are integrated into the steering wheel are particularly known hitherto. [0003] However, for some demanding applications, the contact needs to be localized in addition to pure contact detection, that is, not only the contact to the steering wheel itself, but also the location of the contact with the steering wheel must be determined. However, such location determination is techn...
Claims
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IPC IPC(8): B62D1/06H03K17/955
CPCB62D1/046B62D1/06H03K17/962H03K2217/96072G06F3/041
Inventor G·赫兹曼M·席林格
Owner ZF汽车安全德国有限公司