A kind of processing method of contact torque sensor signal of eps controller

Abstract

The invention relates to the technical field of vehicle power-assisted steering, in particular to a signal processing method of a contact type torque sensor of an EPS controller. The signal processingmethod of the contact type torque sensor of the EPS controller comprises the following steps that S1, main and secondary signals of the contact type torque sensor are received; S2, whether or not theabsolute value of an error of the sum of the main and secondary signals of the contact type torque sensor exceeds a first set threshold value is judged, if not, the EPS controller executes a main program to carry out power assisting, and if yes, S3 is started; S3, whether or not the absolute value of the error of the sum of the main and secondary signals of the contact type torque sensor exceedsa second set threshold value is judged, if not, the EPS controller outputs an alarm signal, but the main program is still executed, and power assisting is weakened, and if yes, the EPS controller outputs the alarm signal, execution of the main program is stopped, and power assisting is stopped, wherein the second set threshold value is larger than the first set threshold value. By means of the method, the cost is reduced, and the user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of power steering of automobiles, and in particular relates to a signal processing method of a contact torque sensor of an EPS controller. Background technique [0002] Automotive EPS (electronic power steering) needs to input two complementary torque sensor signals to the EPS controller through the contact torque sensor, namely the main signal and the auxiliary signal, referred to as the main and auxiliary signals. The existing two complementary torque sensors The signals are actually analog voltage signals in the range of 0-5V, and the two signals are complementary. Through the voltage difference between the two signals, the EPS controller can realize the calculation of the steering torque, thereby realizing the power steering column. [0003] However, the contact torque sensor is easy to wear during use. After wear, the error between the output main channel signal and the auxiliary channel signal will be ...

AI Technical Summary

Problems solved by technology

Although the existing method solves the above problems, it also has the following problems: 1. The service life of the contact torque sensor is shortened, which increases the cost of use; , the EPS controller directly stops the power assist, which will cause the user to panic and make operational errors during driving, reducing the user experience and safety

Although increasing the judgment threshold of the absolute value of the error of the main and auxiliary signals can prolong the service life of the contact torque sensor, thereby reducing the cost, but the increase of the error may cause the EPS controller to malfunction, and even cause the steering wheel to rotate, reducing safety

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