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Device for recording the speed of rotation of a wheel with an increased intrinsic safety

A wheel and linear technology, applied in the field of wheel rotation speed detection devices with increased inherent safety, can solve the problem that the inherent safety of rotation speed sensors has not been improved, and achieve the effect of increasing the use of spectrum

Inactive Publication Date: 2008-08-06
CONTINENTAL TEVES AG & CO OHG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such rotational speed sensors are mainly used to increase the resolution, however, no improvement is obtained with respect to the inherent safety of said rotational speed sensors

Method used

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  • Device for recording the speed of rotation of a wheel with an increased intrinsic safety
  • Device for recording the speed of rotation of a wheel with an increased intrinsic safety
  • Device for recording the speed of rotation of a wheel with an increased intrinsic safety

Examples

Experimental program
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Effect test

Embodiment Construction

[0049] Fig. 1 shows an example of two known devices for detecting the rotational speed of a wheel. In FIG. 1 a ), the sensor 1 and the electronic control unit ECU 2 of the motor vehicle and the electronic control unit ECU 2 of the motor vehicle regulation system (electronic controller of the ABS regulator) 2 are electrically connected to each other via two-wire conductors 3 , 4 . Sensor operation requires an operating voltage VB which is provided by the ECU at terminals K1 , K2 . The active sensor 1 is thus supplied with energy via the two-wire conductors 3 , 4 . By its rotation, the magnetic encoder 5 modulates the magnetic field around it, which is detected by the sensor 1 . In this case, the sensor 1 is dependent on the amplitude of the encoder rotation modulation signal current Is, whereby the item of information on the wheel rotation speed is transmitted in encoded form to the ECU 2, where it is recoded decoding. FIG. 1 b ) shows a further sensor 6 which is electricall...

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PUM

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Abstract

The invention relates to a device for recording with an in increased intrinsic safety linear and / or rotation movements of a body consisting of an magnetic encoder (5,25) and a sensor (26), wherein said magnetic encoder (5,25) is displaceable together with said body and is magnetically coupled to at least two sensor elements (S1, S2) of the sensor (26) by a magnetic air gap, the sensor (26) comprises at least two distinct signal paths (S1, f1; S2, f2) which respectively comprise at least one signal conditioning stage (28, 29), at least one primary measurement signal path (Sl, fl) is produced in such a way that the output signal thereof restitutes at a normal operation the simple frequency of the encoder movement and at least one monitoring signal path (S2,f2) is produced in such a way that the output signal thereof restitutes the double of the encoder movement frequency.

Description

technical field [0001] The invention relates to a method for increasing the intrinsic safety of a device for rotational speed detection and / or for the intrinsically safe detection of linear and / or rotational movements of objects, in particular wheels, according to the preamble of claim 1 A method relating to a device for intrinsically safe rotational speed detection and / or a device for inherently safe detection of linear and / or rotational movement of an object (in particular a wheel) according to the preamble of claim 2, and to the Use of the method and / or the device in a motor vehicle. Background technique [0002] It is known to detect the rotational speed of a wheel by means of a sensor arrangement having a magnetic encoder rotating with the wheel, which is magnetically coupled to the magnetic field sensitive sensor via a magnetic air gap, and at least one magnetic field sensitive sensor. [0003] Due to their robustness and good signal quality, sensors based on the magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/244G01D5/16G01P3/489G01P3/487
CPCG01P3/487G01D5/24438G01P3/488G01P3/489G01D5/16G01D5/244G01D5/00
Inventor P·洛贝格W·弗利茨
Owner CONTINENTAL TEVES AG & CO OHG