Rearview mirror folding and unfolding control system

Abstract

A rearview mirror folding and unfolding control system comprises a rearview position sensing unit, a control unit and a driving motor, wherein the rearview position sensing unit can collect information of an angle position, where the rearview mirror lies currently and transmitting the information to the control unit; a corresponding relationship between the rearview angle position and electrifyingtime length of the driving motor is stored in the control unit, different electrifying time length can be selected according to different rearview mirror positions; and according to the selected electrifying time length, the driving motor is controlled to drive the rearview mirror to fold or unfold. Rearview mirror rotation angle information can be collected by the rearview mirror sensing unit; according to the collected rearview mirror rotation angle information, constant voltage output time length of the motor during rearview mirror folding and unfolding can be adjusted into a plurality ofdifferent rearview mirror folding and unfolding time length; and problems that the rearview mirror motor stall and cannot precisely fold and unfold in the prior art can be solved.

Description

technical field [0001] The automobile control technology of the present invention particularly relates to a rearview mirror folding and unfolding control system. Background technique [0002] The car rearview mirror is a tool for the driver to directly obtain external information such as the rear, side and bottom of the car while sitting in the cab seat. In order to facilitate operation, many models are currently equipped with an automatic folding and unfolding system for rearview mirrors. The current rearview mirror automatic folding and unfolding system mostly utilizes a drive motor to drive the rearview mirror to fold or unfold. [0003] Since the folding and unfolding system of the exterior rearview mirror is exposed to the outside of the vehicle for a long time, the folding and unfolding of the exterior rearview mirror of the car will be affected by the ambient temperature. [0004] When the ambient temperature is low (for example, it often reaches minus 20 or 30 degr...

AI Technical Summary

Problems solved by technology

[0006] However, at present, when the rearview mirror is folded and unfolded, the running time of the driving motor is usually set uniformly according to the standard at normal temperature, and the uniform folding and unfolding time is adopted regardless of high temperature or low temperature, which will cause the rearview in low temperature conditions. The time required for the mirror to be fully folded and unfolded is longer than the actual running time of the motor. For example, it takes about 7 seconds to fully fold or unfold the rearview mirror at low temperature, but the actual folding or unfolding motor of the rearview mirror only runs for 3 seconds, resulting in folding, The unfolding is not in place; at high temperature, it will cause the rearview mirror to be completely folded, and the time required for unfolding is shorter than the actual running time of the motor. For example, it takes about 2 seconds for the rearview mirror to be safely folded or unfolded at high temperature, while the actual folding Or unfold the motor and run for 3 seconds, which will cause the motor to stall when the temperature is high. If the motor is often overloaded, it will increase the risk of product failure and affect the service life of the motor

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