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Detection method for output signal of vehicle wheel speed sensor and circuit thereof

A wheel speed sensor and output signal technology, which is applied in the detection method of the output signal of the vehicle wheel speed sensor and its circuit field, can solve problems such as cost increase, achieve good reliability, save time and money, and have a simple and practical structure

Active Publication Date: 2010-08-04
NANJING AUTOMOBILE GROUP CORP
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  • Description
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AI Technical Summary

Problems solved by technology

In the current automotive active safety system, different types of wheel speed sensors need to be processed differently. If the wheel speed sensor of the vehicle changes, the hardware of the controller needs to be changed to adapt to the change of the sensor. The entire system needs to be redesigned. bring about substantial cost increases

Method used

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  • Detection method for output signal of vehicle wheel speed sensor and circuit thereof
  • Detection method for output signal of vehicle wheel speed sensor and circuit thereof

Examples

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Embodiment 1

[0017] In the method for detecting the output signal of the vehicle wheel speed sensor of the present invention, the sensor signal is divided into a common terminal and a signal terminal. The common terminal w2 can be divided by resistors R3 and R4 to set the voltage of the common comparison terminal to 1 / 2 of the power supply voltage. The signal terminal w1 is connected to the ground with an adjustable resistance Rs as a load output, and can adapt to different types of sensors by changing the adjustable resistance Rs. When it is a magnetoelectric sensor, since the sensor itself is a sine wave voltage signal output, the adjustable resistor Rs is adjusted to a high-impedance state. At this time, the current of the signal passing through the adjustable resistor Rs can be ignored, and the signal can be regarded as being directly transmitted to Comparator U1A positive terminal; when the sensor is a Hall sensor, if the Hall sensor is a voltage output, you can refer to the magnetoel...

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PUM

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Abstract

The invention relates to a detection method for an output signal of a part of an automobile and a circuit thereof, in particular to a detection method for an output signal of a vehicle wheel speed sensor and a circuit thereof. A sensor signal is divided into a public end and a signal end, wherein the public end sets the public comparison end voltage to be 1 / 2 of mains voltage by a resistance partial voltage way; the signal end is connected with an adjustable resistor over the ground, and the adjustable resistor is used for load output; sensors of different types are adapted by changing the adjustable resistor; and a sine wave or square wave output by the wheel speed sensor is shaped into a standard square wave through comparing the 1 / 2 of mains voltage with the signal of the wheel speed sensor by a comparator. The invention is applied to an anti-skid brake system (ABS) / traffic control station (TCS) / electronic stability program (ESP) system of the automobile, can detect not only the signal of a magnetoelectric wheel speed sensor, but also the signal of a Hall type sensor.

Description

technical field [0001] The invention relates to a method for detecting output signals of auto parts and a circuit thereof, in particular to a method for detecting output signals of a vehicle wheel speed sensor and a circuit thereof. Background technique [0002] In the automotive active safety system (such as ABS / TCS / ESP) applied on the vehicle, the wheel speed sensor is an indispensable part. So far, the wheel speed sensor is divided into two forms, one is the principle of magnetoelectric induction, that is, through the way of permanent magnet winding wire, cutting the magnetic field line to generate a sine wave to get the output, the output of this method is an analog output; the other is Through the Hall principle, the wheel speed is detected by changing the magnetic field applied in the vertical direction of the current, resulting in a change in the output current of the sensor. In the current automotive active safety system, different types of wheel speed sensors need ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/46
Inventor 钟国华张丙军
Owner NANJING AUTOMOBILE GROUP CORP
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