Abs system based on gmr sensor

Abstract

The invention discloses an ABS system based on a GMR sensor. The ABS system includes a signal acquisition module used for obtaining a rotating speed signal of a vehicle tyre, a signal processing module electrically connected with the signal acquisition module, and a solenoid valve control circuit and an oil scavenger pump motor control circuit which are electrically connected with the signal processing module. The ABS system also includes a wireless transmitter and a wireless receiver, an input end of the wireless transmitter is electrically connected with the GMR sensor, an output end of the wireless transmitter is wirelessly connected with an input end of the wireless receiver, and an output end of the wireless receiver is electrically connected with an input end of the signal processing module. The abovementioned ABS system adopts the GMR sensor to obtain the rotating speed signal of the tyre, the GMR sensor has relatively high sensitivity and an output of the GMR sensor is not subjected to too large influence due to a shake, and thus relatively accurate information can be provided for the system.

Description

technical field [0001] The invention relates to an ABS system, in particular to an ABS system based on a GMR sensor. Background technique [0002] Chinese patent CN2011200912979 discloses a Hall-type ABS sensor. The Hall-effect sensor used in it is the type of current sensor most commonly used in modern standard ABS. The Hall sensor works by measuring the Hall coefficient of the induced flux level, which can map the fluctuations in the magnetic flux caused by the rotation of the gear, and can detect each fluctuation caused by the flux, even at zero speed and It has the power to provide detailed information with only a linear signal, so it is easier to use the controller in the ABS system for decision-making. Its advantage is that because the Hall sensors are based on bipolar semiconductor technology, they can be fabricated on the same chip as the microelectronic signal processing circuit (Flemming, 2001, p.300). Of course, it is not perfect, and it performs poorly in terms...

AI Technical Summary

Problems solved by technology

Of course, it is not perfect, and it performs poorly in terms of sensitivity and handling of jitter effects. The air gap range of the output signal of the Hall sensor is between 0.4mm-2.5mm, compared to the 3mm-5.5 of the GMR sensor. In terms of mm, we can know that the sensitivity of the Hall sensor is not very high

At the same time, the output of the Hall sensor will be severely affected by the jitter

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