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Method and device for determining a speed by means of an inductive speed sensor

A sensor, inductive technology used in devices that use electrical/magnetic methods, devices that measure the time it takes to move a certain distance, velocity/acceleration/shock measurements, etc.

Pending Publication Date: 2020-09-22
KNORR-BREMSE SYST FUER NUTZFAHRZEUGE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for this purpose a voltage source must be set and connected for the supply voltage

Method used

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  • Method and device for determining a speed by means of an inductive speed sensor
  • Method and device for determining a speed by means of an inductive speed sensor
  • Method and device for determining a speed by means of an inductive speed sensor

Examples

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Embodiment Construction

[0069] figure 1 It is a schematic diagram of the wheel rotational speed sensor 1 which is a preferable embodiment of the speed measuring device of the present invention. The wheel speed sensor 1 is designed as a passive inductive speed sensor and comprises a ferromagnetic transmitter element (transmitter) 2 which is, for example, annular and coaxial with the wheel of the vehicle relative to the wheel axis. turn. Furthermore, the wheel speed sensor 1 comprises a stationary coil 3 and a soft magnetic core 4, wherein the coil 3 surrounds the soft magnetic core 4, and the common central axis of the coil 3 and the soft magnetic core 4 is parallel to the wheel axis and perpendicular to the following plane arrangement, this plane is also perpendicular to the wheel axis.

[0070] The ferromagnetic transmitter element 2 has alternately protruding teeth 5 and tooth slots 6 . Wheel speed sensor 1 also includes electronic evaluation circuit 7 , which is connected to coil 3 via line 8 ....

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Abstract

The invention relates to a method for determining a speed between a sensing element comprising at least one coil (3) and a ferromagnetic transmitter element (2) which modifies the inductance (L) of the at least one coil (3), in a vehicle, by means of an inductive speed sensor (1) comprising at least the coil (3) and the ferromagnetic transmitter element (2), according to which a modification of the inductance (L) of the at least one coil (3) is detected and the speed is determined based on the modified inductance (L) of the at least one coil (3), and where an inductive speed sensor (1) is respectively provided, as a wheel speed sensor, for at least two wheels (A, B) of the vehicle. According to the invention, a reversal of the direction of movement of the ferromagnetic transmitter element(2) in relation to the at least one coil (3) or a reversal of the direction of travel of the vehicle from forward travel to rearward travel or from rearward travel to forward travel is identified on the basis of at least one temporal phase shift (deltat1, deltat2) of the time histories of the inductances (L) detected by means of the wheel speed sensors (1) of the at least two wheels (A, B).

Description

technical field [0001] The invention relates to a method for determining a measuring receiver comprising at least one coil and changing at least one coil in a vehicle by means of an inductive speed sensor having at least a coil and a ferromagnetic transmitter element according to the preamble of claim 1 A method of speed between ferromagnetic transmitter elements of an inductance L and relates to a speed measuring device according to the preamble of claim 8 for determining a measuring receiver comprising at least one coil in a vehicle The speed measuring device has at least one inductive speed sensor with a ferromagnetic transmitter element that changes the inductance of at least one coil. [0002] Furthermore, the invention also relates to a driver assistance system according to claim 19 with the speed measuring device and also to a vehicle according to claim 21 with the driver assistance system. Background technique [0003] An active speed sensor is known as a wheel spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P13/04G01P3/488G01P3/49G01P13/00
CPCG01P3/488G01P3/49G01P13/00G01P13/04G01P13/045G01P3/481G01P3/66
Inventor A·克卢夫廷格尔M·赫格斯C·许贝尔M·艾斯纳
Owner KNORR-BREMSE SYST FUER NUTZFAHRZEUGE GMBH
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