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Electric input key

A technology for inputting keys and displacement signals, which is applied in the direction of measuring electrical variables, protecting equipment, instruments, etc., and can solve problems such as increased error diagnosis and increased switch point difference

Inactive Publication Date: 2014-01-29
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over the entire service life, the switching point of the displacement sensor can be shifted due to wear of the mechanical components, which can lead to an increase in the switching point difference between the individual sensors
This can lead to an increase in the above-mentioned misdiagnosis of the individual displacement sensors

Method used

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  • Electric input key
  • Electric input key

Examples

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Embodiment Construction

[0019] exist figure 1 The electrical input key 1 shown schematically in section in FIG. 1 includes an operating surface 2 which is elastically supported on a base body 3 . The helical spring 4 is compressed when the actuating surface 2 is depressed, and the actuating surface 2 automatically returns to its starting position after the helical spring 4 has been released.

[0020] Furthermore, the input key 1 includes an analog displacement sensor 5 and a digital displacement sensor 6 . However other embodiments using two analog displacement sensors or more than two displacement sensors are also possible. In principle, the input key comprises at least one analog displacement sensor and at least one further displacement sensor (analog or digital).

[0021] In the illustrated exemplary embodiment, the analog displacement sensor 5 is an inductive sensor which cooperates with a magnet 7 . When the operating surface 2 moves, the magnet 7 approaches the analog displacement sensor 5, ...

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PUM

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Abstract

The invention relates to an electric input key having an actuating surface and a plurality of displacement sensors which are each designed to generate a displacement signal when the actuating surface is touched, and also having an evaluation unit for evaluating the displacement signals and outputting a determined switching state, wherein the input key (1) has at least one analog displacement sensor (5), at least one digital displacement sensor (6), and a calibration device (11) for calibrating the analog displacement sensor (5) by using displacement signals measured by the digital displacement sensor (6), wherein the evaluation unit (8) is designed to carry out self-diagnosis by using calibrated and measured displacement signals.

Description

technical field [0001] The invention relates to an electrical input key with an operating surface and a plurality of displacement sensors which are each designed to generate a displacement signal when the actuating surface is touched, and a device for evaluating the displacement signal and outputting the determined displacement signal. Analysis unit for the switching state. Background technique [0002] Such an input key is used, for example, in motor vehicles to enter a shift request during a shift-by-wire shift operation. The displacement sensor of the input keys can be designed redundantly by using several digital sensors, such as microswitches. [0003] An electrical input key is known from DE 10 2008 015 910 A1, which switches / switches a plurality of switches simultaneously during its actuation. Possible malfunctions can be determined with the aid of diagnostic routines. For this purpose, test signals are generated which are applied to one or more switches and evalua...

Claims

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Application Information

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IPC IPC(8): G01D3/02G01D3/08
CPCG01D3/08G01D3/02G01R35/005
Inventor H·莫克莱恩M·鲍尔
Owner AUDI AG
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