An automatic adjustment system and method for automotive rearview mirrors

Abstract

An automatic rearview mirror adjustment system and method for automobiles, belonging to the field of automotive safe driving, is disclosed. The method involves: recording the current position of the rearview mirror using an angle encoder; activating a turn signal switch to close its auxiliary contact; upon receiving the signal from the closed auxiliary contact, a CPU drives a stepper motor to rotate the rearview mirror to one-third of its preset maximum angle; upon receiving a steering signal from the steering wheel switch, the CPU drives the stepper motor to rotate the rearview mirror to its preset maximum angle; after the vehicle completes the turn, the steering wheel switch automatically or manually returns to center, the turn signal stalk automatically resets, and upon receiving the signal from the restored auxiliary contact, the CPU, after a one-second delay, drives the stepper motor to restore the rearview mirror to the current angle position recorded by the angle encoder. This invention enables automatic limit adjustment of the rearview mirror, fully utilizing its original variable functions.

Description

Technical Field

[0001] This invention belongs to the field of automotive safe driving technology, specifically relating to an automatic adjustment system and method for automotive rearview mirrors. Background Technology

[0002] Regarding the issue of blind spots in the current adjustment of car side mirrors: Typically, drivers adjust the angle and position of the side mirrors before driving, based on their height and the type of car, and then don't adjust them again while driving. The problem with this method is that... Figure 1 As shown, drivers can only see a portion of the sides of the car using the left and right rearview mirrors, not the entire sides, creating a large blind spot. This poses a significant safety hazard to the vehicle and its occupants.

[0003] Currently, the common method for adjusting the angle and position of car side mirrors is as follows: The driver uses the horizon as a reference point and adjusts the vertical angle to ensure the mirror displays a roughly equal view of the sky and ground. The horizontal angle is then adjusted to ensure the car body occupies approximately one-quarter of the mirror's area. However, this method results in a significant blind spot on the left side when a vehicle moves from a side road onto the main road. The driver cannot see other vehicles in the main road through the left side mirror, creating a large blind spot. If the driver accelerates and cuts sharply into the rightmost lane of the main road, a collision with a vehicle traveling at high speed in that lane is highly likely. Similarly, the right rearview mirror is generally adjusted as follows: (Since the right rearview mirror is far from the driver's position, it is necessary to reduce the space occupied by the sky and reserve as much space as possible for the side of the vehicle). With the horizon as a reference, the driver adjusts the right rearview mirror so that the sky occupies about 1 / 4 of the upper part of the mirror and the vehicle body occupies about 1 / 4 of the left side of the mirror. Following this adjustment method, when the vehicle enters the auxiliary lane from the main road, the vehicle cannot be seen from the right rearview mirror, and there is a large blind spot on the right side. If the vehicle accelerates and cuts into the auxiliary lane at a large angle, it is easy to collide with the vehicle traveling at high speed in the auxiliary lane.

[0004] Under current conditions, to address the aforementioned issues, a new adjustment method exists: fully utilizing the original variable functionality of the rearview mirrors, extending the left and right mirrors outwards to their maximum limits. This minimizes blind spots on both sides, reducing potential safety hazards as much as possible. Figure 2As shown. However, the problem is that drivers cannot adjust the rearview mirror adjustment buttons in time while the vehicle is in motion. Forcing an adjustment will distract the driver and create a safety hazard. Even if an adjustment is forcibly made, the rearview mirrors still need to be adjusted back to the normal driving position when the vehicle returns to normal driving. If the driver turns their head to look to the side and rear, they will not be able to see oncoming vehicles due to obstructions from the sides of the car and from the passenger seat and its back, which will also distract the driver from the road ahead and create a safety hazard. Summary of the Invention

[0005] Therefore, in order to solve the problem of blind spots in the existing methods for adjusting the angle and position of the left and right rearview mirrors of automobiles, and to achieve automatic limit adjustment of the left and right rearview mirrors, that is, to fully utilize the original variable functions of the rearview mirrors without distracting the driver's attention or requiring additional operation from the driver, this invention provides an automatic adjustment system and method for automobile rearview mirrors.

[0006] To solve the above-mentioned technical problems, the specific technical solution adopted by the present invention is as follows:

[0007] This invention provides an automatic rearview mirror adjustment system for automobiles, comprising:

[0008] Function switch;

[0009] The CPU control board, connected to the function switch, is used to realize signal reception, angle position storage and motor control functions;

[0010] The system includes a left rearview mirror angle encoder, a right rearview mirror angle encoder, a left rearview mirror stepper motor, and a right rearview mirror stepper motor, all connected to a CPU control board. The left rearview mirror angle encoder and the left rearview mirror stepper motor are connected to the left rearview mirror, and the right rearview mirror angle encoder and the right rearview mirror stepper motor are connected to the right rearview mirror. The left and right rearview mirror angle encoders are used to receive the angular positions of the left and right rearview mirrors. The CPU control board drives the left and right rearview mirror stepper motors to rotate according to the received angular positions, thereby rotating the left and right rearview mirrors to a specified angular position.

[0011] A left turn switch and a right turn switch are respectively connected to the CPU control board and the vehicle's turn signal control system. The left turn switch receives the left turn signal from the vehicle's turn signal control system and sends a left turn switch auxiliary contact closure signal and a left turn switch auxiliary contact recovery signal to the CPU control board based on the received left turn signal. The CPU control board drives the left rearview mirror stepper motor to rotate the left rearview mirror to 1 / 3 of the preset maximum angle position based on the left turn switch auxiliary contact closure signal. After a 1-second delay based on the left turn switch auxiliary contact recovery signal, the CPU control board drives the left rearview mirror stepper motor to rotate the left rearview mirror back to the preset left rear position. The rearview mirror angle encoder records the current angle position; the right turn switch is used to receive the right turn signal sent by the vehicle turn signal control system, and sends a right turn switch auxiliary contact closing signal and a right turn switch auxiliary contact recovery signal to the CPU control board according to the received right turn signal; the CPU control board drives the right rearview mirror stepper motor to move according to the right turn switch auxiliary contact closing signal, thereby driving the right rearview mirror to rotate to 1 / 3 of the preset maximum angle position; the CPU control board drives the right rearview mirror stepper motor to move after a 1-second delay according to the right turn switch auxiliary contact recovery signal, thereby driving the right rearview mirror to return to the current angle position recorded by the right rearview mirror angle encoder;

[0012] A steering wheel switch connected to a CPU control board; the steering wheel switch is used to receive the steering wheel rotation signal and send a steering signal to the CPU control board according to the steering wheel rotation signal. After receiving the rotation signal from the steering wheel switch, the CPU control board drives the left rearview mirror stepper motor and the right rearview mirror stepper motor to move, thereby driving the left and right rearview mirrors to rotate to the preset maximum angle position.

[0013] Furthermore, the left turn switch and the right turn switch are mounted on the vehicle's turn signal stalk.

[0014] This invention provides a method for automatically adjusting a car rearview mirror, implemented using a car rearview mirror automatic adjustment system. The method includes the following steps:

[0015] Step S1: Turn on the function switch to start the system;

[0016] Step S2: Record the current angle position of the rearview mirror using the rearview mirror angle encoder;

[0017] Specifically, the left rearview mirror angle encoder is used to record the current angle position of the left rearview mirror, and the right rearview mirror angle encoder is used to record the current angle position of the right rearview mirror.

[0018] Step S3: Pull the turn signal switch to close the auxiliary contact of the turn signal switch;

[0019] Step S4: When the CPU control board receives the turn signal switch auxiliary contact closing signal, it drives the rearview mirror stepper motor to move, thereby driving the rearview mirror to rotate to 1 / 3 of the preset maximum angle position.

[0020] Step S5: When the CPU control board receives the steering signal from the steering wheel switch, it drives the rearview mirror stepper motor to rotate the rearview mirror to the preset maximum angle position.

[0021] Step S6: After the car completes the turn, the steering wheel switch automatically or manually returns to center, the car turn signal lever automatically resets, and after the CPU control board receives the turn signal from the auxiliary contact of the steering switch, it drives the rearview mirror stepper motor to move after a 1-second delay, thereby driving the rearview mirror to return to the current angle position recorded by the rearview mirror angle encoder.

[0022] Furthermore, in step S2, the current angle position of the left rearview mirror is recorded using the left rearview mirror angle encoder, and the current angle position of the right rearview mirror is recorded using the right rearview mirror angle encoder.

[0023] Furthermore, in step S3, the left turn switch is turned to close the auxiliary contact of the left turn switch, and the right turn switch is turned to close the auxiliary contact of the right turn switch.

[0024] Furthermore, in step S4, when the CPU control board receives the closing signal of the left turn switch auxiliary contact of the left turn switch, it drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position; when the CPU control board receives the closing signal of the right turn switch auxiliary contact of the right turn switch, it drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to rotate to the current angle to 1 / 3 of the preset maximum angle position.

[0025] Furthermore, in step S5, when the CPU control board receives the leftward turn signal from the steering wheel switch, it drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to rotate to the preset maximum angle position; when the CPU control board receives the rightward turn signal from the steering wheel switch, it drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to rotate to the preset maximum angle position.

[0026] Furthermore, in step S6, after the car completes the steering, the steering wheel switch automatically or manually returns to center, and the car turn signal lever automatically resets. When the CPU control board receives the left turn switch auxiliary contact recovery signal from the left turn switch, it delays for 1 second and then drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to return to the current angle position recorded by the left rearview mirror angle encoder. When the CPU control board receives the right turn switch auxiliary contact recovery signal from the right turn switch, it delays for 1 second and then drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to return to the current angle position recorded by the right rearview mirror angle encoder.

[0027] The beneficial effects of this invention are:

[0028] This invention provides an automatic rearview mirror adjustment system. To achieve automatic rearview mirror adjustment, upon receiving a turn signal from the car's turn signal stalk, the CPU control board drives the rearview mirror stepper motor at a small angle. Then, while waiting for the steering wheel to turn, the system drives the rearview mirror stepper motor to a preset maximum angle position. After the car completes the turn, the turn signal stalk returns to its normal position, and simultaneously, the rearview mirror stepper motor and the rearview mirror rotate back to their original positions. This invention adds auxiliary opening and closing contacts to the original turn signal switch, monitors changes in the car's steering wheel angle to determine the angle and position of the rearview mirror stepper motor, and adjusts the rotation angle and reset position of the rearview mirror stepper motor via a rearview mirror angle encoder, thus increasing the rearview mirror range required for large-angle turns.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. Adding the automatic rearview mirror adjustment system provided by this invention will not affect the original functions of the car. This is because, although the system of this invention is added to the car's turn signal control system, it is a new system independent of the car's turn signal control system and does not affect the original functions of the car's turn signal control system.

[0031] 2. After installing the automatic rearview mirror adjustment system provided by this invention, the original variable functions of the left and right rearview mirrors can be maximized. Currently, drivers adjust the angle and position of the left and right rearview mirrors before driving, and generally do not change them after driving. This adjustment method does not fully utilize the original variable functions of the rearview mirrors. After installing the system of this invention, the left and right rearview mirrors will automatically adjust their angle and position as the turn signal stalk is moved up and down, maximizing the original variable functions of the left and right rearview mirrors and minimizing the driver's blind spots.

[0032] 3. The automatic rearview mirror adjustment system provided by this invention has a simple installation process. The system of this invention is small in size and can be installed in the spare space under the protective cover of the steering wheel of the car without affecting the original interior appearance of the car. In addition to adding control to the steering system of the left and right rearview mirror motors, it does not affect the original electrical system of the car. Attached Figure Description

[0033] Figure 1 This is a diagram showing the blind spots of the left and right rearview mirrors under normal driving conditions (the black areas represent blind spots).

[0034] Figure 2 This is a diagram showing the blind spot after the right rearview mirror is extended to its extreme position (the black area represents the blind spot).

[0035] Figure 3 This invention provides a structural block diagram of an automatic rearview mirror adjustment system for automobiles.

[0036] In the diagram, 1 is the function switch, 2 is the CPU control board, 3 is the left rearview mirror angle encoder, 4 is the right rearview mirror angle encoder, 5 is the left rearview mirror stepper motor, 6 is the right rearview mirror stepper motor, 7 is the left turn switch, 8 is the right turn switch, 9 is the steering wheel turn switch, 10 is the left rearview mirror, and 11 is the right rearview mirror. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of this patent, the patent will be further described in detail below with reference to the accompanying drawings.

[0038] In a first aspect, the present invention provides an automatic adjustment system for automotive rearview mirrors.

[0039] like Figure 3 As shown, the automatic rearview mirror adjustment system for automobiles provided by this invention mainly consists of the following modules:

[0040] Function switch 1, CPU control board 2, left rearview mirror angle encoder 3, right rearview mirror angle encoder 4, left rearview mirror stepper motor 5, right rearview mirror stepper motor 6, left turn switch 7, right turn switch 8 and steering wheel turn switch 9.

[0041] Function switch 1 is connected to CPU control board 2. Function switch 1 is mainly used to start and stop the system.

[0042] The left rearview mirror angle encoder 3, right rearview mirror angle encoder 4, left rearview mirror stepper motor 5, and right rearview mirror stepper motor 6 are all connected to the CPU control board 2. The left rearview mirror angle encoder 3 is connected to the left rearview mirror 10, the left rearview mirror stepper motor 5 is connected to the left rearview mirror 10, the right rearview mirror angle encoder 4 is connected to the right rearview mirror 11, and the right rearview mirror stepper motor 6 is connected to the right rearview mirror 11. The CPU control board 2 is mainly used for signal reception, angle position storage, and motor control functions. The left rearview mirror angle encoder 3 is mainly used to receive the angle position of the left rearview mirror 10 and transmit it to the CPU control board 2. The left rearview mirror stepper motor 5 is mainly used to drive the left rearview mirror 10 to rotate to a specified angle position. The right rearview mirror angle encoder 4 is mainly used to receive the angle position of the right rearview mirror 11 and transmit it to the CPU control board 2. The right rearview mirror stepper motor 6 is mainly used to drive the right rearview mirror 11 to rotate to a specified angle position.

[0043] Both the left turn switch 7 and the right turn switch 8 are connected to the CPU control board 2 and the vehicle's turn signal control system, respectively. Specifically, the left turn switch 7 and right turn switch 8 can be installed on the vehicle's turn signal stalk. The left turn switch 7 primarily receives the left turn signal from the vehicle's turn signal control system and sends a left turn switch auxiliary contact closure signal and a left turn switch auxiliary contact recovery signal to the CPU control board 2 based on the received left turn signal. The right turn switch 8 primarily receives the right turn signal from the vehicle's turn signal control system and sends a right turn switch auxiliary contact closure signal and a right turn switch auxiliary contact recovery signal to the CPU control board 2 based on the received right turn signal. Specifically, when the CPU control board 2 receives the closing signal of the left turn switch auxiliary contact of the left turn switch 7, it can drive the left rearview mirror stepper motor 5 to operate, thereby driving the left rearview mirror 10 to rotate to 1 / 3 of the preset maximum angle position. When the CPU control board 2 receives the closing signal of the right turn switch auxiliary contact of the right turn switch 8, it can drive the right rearview mirror stepper motor 6 to operate, thereby driving the right rearview mirror 11 to rotate to 1 / 3 of the preset maximum angle position. When the CPU control board 2 receives the left turn switch auxiliary contact recovery signal of the left turn switch 7, it delays for 1 second before driving the left rearview mirror stepper motor 5 to operate, thereby driving the left rearview mirror 10 to return to the current angle position recorded by the left rearview mirror angle encoder 3. When the CPU control board 2 receives the right turn switch auxiliary contact recovery signal of the right turn switch 8, it delays for 1 second before driving the right rearview mirror stepper motor 6 to operate, thereby driving the right rearview mirror 11 to return to the current angle position recorded by the right rearview mirror angle encoder 4.

[0044] The steering wheel switch 9 is connected to the CPU control board 2. The steering wheel switch 9 primarily receives steering wheel rotation signals and sends steering signals to the CPU control board 2 accordingly. Specifically, when the CPU control board 2 receives a leftward rotation signal from the steering wheel switch 9, it activates the left rearview mirror stepper motor 5, thereby rotating the left rearview mirror 10 to a preset maximum angle position. Similarly, when the CPU control board 2 receives a rightward rotation signal from the steering wheel switch 9, it activates the right rearview mirror stepper motor 6, thereby rotating the right rearview mirror 11 to a preset maximum angle position.

[0045] Under existing conditions, the automatic rearview mirror adjustment system provided by this invention is an additional synchronization system to the existing automotive turn signal control system. This automatic rearview mirror adjustment system can automatically adjust the angle and position of the left and right rearview mirrors while the turn signal stalk is moved up and down.

[0046] The working principle of the automatic rearview mirror adjustment system for automobiles provided by this invention is as follows:

[0047] When the car turns left, the left rearview mirror 10 will automatically extend to the preset maximum angle position. When the car turns to normal forward driving, the turn signal stalk will automatically reset, and the left rearview mirror 10 will automatically return to its original position. Similarly, when the car turns right, the right rearview mirror 11 will automatically extend to the preset maximum angle position. When the car turns to normal forward driving, the turn signal stalk will automatically reset, and the right rearview mirror 11 will automatically return to its original position.

[0048] Secondly, the present invention provides an automatic adjustment method for a car rearview mirror, which is mainly implemented by an automatic adjustment system for a car rearview mirror provided in the first aspect.

[0049] The present invention provides an automatic adjustment method for automotive rearview mirrors, the specific implementation process of which is as follows:

[0050] Step S1: Turn on function switch 1 to start the system;

[0051] Step S2: Record the current angle position of the rearview mirror using the rearview mirror angle encoder;

[0052] Specifically, the left rearview mirror angle encoder 3 can record the current angle position of the left rearview mirror 10, while the right rearview mirror angle encoder 4 can record the current angle position of the right rearview mirror 11.

[0053] Step S3: Pull the turn signal switch to close the auxiliary contact of the turn signal switch;

[0054] Specifically, turning the left turn switch 7 will close the auxiliary contact of the left turn switch, and turning the right turn switch 8 will close the auxiliary contact of the right turn switch.

[0055] Step S4: When the CPU control board 2 receives the turn signal switch auxiliary contact closing signal, it drives the rearview mirror stepper motor to move, thereby driving the rearview mirror to rotate to 1 / 3 of the preset maximum angle position.

[0056] Specifically, when the CPU control board 2 receives the left turn switch auxiliary contact closure signal of the left turn switch 7, it can drive the left rearview mirror stepper motor 5 to move, thereby driving the left rearview mirror 10 to rotate to 1 / 3 of the preset maximum angle position.

[0057] Specifically, when the CPU control board 2 receives the closing signal of the right turn switch auxiliary contact of the right turn switch 8, it can drive the right rearview mirror stepper motor 6 to move, thereby driving the right rearview mirror 11 to rotate from the current angle to 1 / 3 of the preset maximum angle position.

[0058] Step S5: When the CPU control board 2 receives the steering signal from the steering wheel switch 9, it drives the rearview mirror stepper motor to move, thereby driving the rearview mirror to rotate to the preset maximum angle position.

[0059] Specifically, when the CPU control board 2 receives the leftward turn signal from the steering wheel switch 9, it drives the left rearview mirror stepper motor 5 to move, thereby driving the left rearview mirror 10 to rotate to the preset maximum angle position.

[0060] Specifically, when the CPU control board 2 receives the right turn signal from the steering wheel switch 9, it drives the right rearview mirror stepper motor 6 to move, thereby driving the right rearview mirror 11 to rotate to the preset maximum angle position.

[0061] Step S6: After the car completes the turn, the steering wheel turn switch 9 automatically or manually returns to center, the car turn signal lever automatically resets, and after the CPU control board 2 receives the turn switch auxiliary contact recovery signal, it drives the rearview mirror stepper motor to move after a 1-second delay, thereby driving the rearview mirror to return to the current angle position recorded by the rearview mirror angle encoder.

[0062] Specifically, after the car completes the turn, the steering wheel turn switch 9 automatically or manually returns to center, the car turn signal lever automatically resets, and after the CPU control board 2 receives the left turn switch auxiliary contact recovery signal from the left turn switch 7, it drives the left rearview mirror stepper motor 5 to move after a delay of 1 second, thereby driving the left rearview mirror 10 to return to the current angle position recorded by the left rearview mirror angle encoder 3.

[0063] Specifically, after the car completes the turn, the steering wheel turn switch 9 automatically or manually returns to center, the car turn signal lever automatically resets, and after the CPU control board 2 receives the right turn switch auxiliary contact recovery signal from the right turn switch 8, it drives the right rearview mirror stepper motor 6 to move after a delay of 1 second, thereby driving the right rearview mirror 11 to return to the current angle position recorded by the right rearview mirror angle encoder 4.

[0064] Step S7: Operation complete.

[0065] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic rearview mirror adjustment system for automobiles, characterized in that, include: Function switch; The CPU control board, connected to the function switch, is used to realize signal reception, angle position storage and motor control functions; The system includes a left rearview mirror angle encoder, a right rearview mirror angle encoder, a left rearview mirror stepper motor, and a right rearview mirror stepper motor, all connected to a CPU control board. The left rearview mirror angle encoder and the left rearview mirror stepper motor are connected to the left rearview mirror, and the right rearview mirror angle encoder and the right rearview mirror stepper motor are connected to the right rearview mirror. The left and right rearview mirror angle encoders are used to receive the angular positions of the left and right rearview mirrors. The CPU control board drives the left and right rearview mirror stepper motors to rotate according to the received angular positions, thereby rotating the left and right rearview mirrors to a specified angular position. A left turn switch and a right turn switch are respectively connected to the CPU control board and the vehicle's turn signal control system. The left turn switch receives the left turn signal from the vehicle's turn signal control system and sends a left turn switch auxiliary contact closure signal and a left turn switch auxiliary contact recovery signal to the CPU control board based on the received left turn signal. The CPU control board drives the left rearview mirror stepper motor to rotate the left rearview mirror to 1 / 3 of the preset maximum angle position based on the left turn switch auxiliary contact closure signal. After a 1-second delay based on the left turn switch auxiliary contact recovery signal, the CPU control board drives the left rearview mirror stepper motor to rotate the left rearview mirror back to the preset left rear position. The rearview mirror angle encoder records the current angle position; the right turn switch is used to receive the right turn signal sent by the vehicle turn signal control system, and sends a right turn switch auxiliary contact closing signal and a right turn switch auxiliary contact recovery signal to the CPU control board according to the received right turn signal; the CPU control board drives the right rearview mirror stepper motor to move according to the right turn switch auxiliary contact closing signal, thereby driving the right rearview mirror to rotate to 1 / 3 of the preset maximum angle position; the CPU control board drives the right rearview mirror stepper motor to move after a 1-second delay according to the right turn switch auxiliary contact recovery signal, thereby driving the right rearview mirror to return to the current angle position recorded by the right rearview mirror angle encoder; A steering wheel switch connected to a CPU control board; the steering wheel switch is used to receive the steering wheel rotation signal and send a steering signal to the CPU control board according to the steering wheel rotation signal. After receiving the rotation signal from the steering wheel switch, the CPU control board drives the left rearview mirror stepper motor and the right rearview mirror stepper motor to move, thereby driving the left and right rearview mirrors to rotate to the preset maximum angle position.

2. The automatic rearview mirror adjustment system for automobiles according to claim 1, characterized in that, The left turn switch and right turn switch are mounted on the vehicle's turn signal stalk.

3. A method for automatically adjusting a car rearview mirror, characterized in that, The automatic rearview mirror adjustment system for automobiles as described in claim 1 is implemented using the following steps: Step S1: Turn on the function switch to start the system; Step S2: Record the current angle position of the rearview mirror using the rearview mirror angle encoder; Step S3: Pull the turn signal switch to close the auxiliary contact of the turn signal switch; Step S4: When the CPU control board receives the turn signal switch auxiliary contact closing signal, it drives the rearview mirror stepper motor to move, thereby driving the rearview mirror to rotate to 1 / 3 of the preset maximum angle position. Step S5: When the CPU control board receives the steering signal from the steering wheel switch, it drives the rearview mirror stepper motor to rotate the rearview mirror to the preset maximum angle position. Step S6: After the car completes the turn, the steering wheel switch automatically or manually returns to center, the car turn signal lever automatically resets, and after the CPU control board receives the turn signal from the auxiliary contact of the steering switch, it drives the rearview mirror stepper motor to move after a 1-second delay, thereby driving the rearview mirror to return to the current angle position recorded by the rearview mirror angle encoder.

4. The automatic adjustment method for a car rearview mirror according to claim 3, characterized in that, In step S2, the current angle position of the left rearview mirror is recorded using the left rearview mirror angle encoder, and the current angle position of the right rearview mirror is recorded using the right rearview mirror angle encoder.

5. The method for automatically adjusting a car rearview mirror according to claim 3, characterized in that, In step S3, the left turn switch is turned to close the auxiliary contact of the left turn switch, and the right turn switch is turned to close the auxiliary contact of the right turn switch.

6. The automatic adjustment method for a car rearview mirror according to claim 3, characterized in that, In step S4, when the CPU control board receives the closing signal of the left turn switch auxiliary contact of the left turn switch, it drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position; when the CPU control board receives the closing signal of the right turn switch auxiliary contact of the right turn switch, it drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to rotate to the current angle to 1 / 3 of the preset maximum angle position.

7. The method for automatically adjusting a car rearview mirror according to claim 3, characterized in that, In step S5, when the CPU control board receives the left turn signal from the steering wheel switch, it drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to rotate to the preset maximum angle position; when the CPU control board receives the right turn signal from the steering wheel switch, it drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to rotate to the preset maximum angle position.

8. The method for automatically adjusting a car rearview mirror according to claim 3, characterized in that, In step S6, after the car completes the steering, the steering wheel switch automatically or manually returns to center, and the car turn signal lever automatically resets. When the CPU control board receives the left turn switch auxiliary contact recovery signal from the left turn switch, it delays for 1 second and then drives the left rearview mirror stepper motor to move, thereby driving the left rearview mirror to return to the current angle position recorded by the left rearview mirror angle encoder. When the CPU control board receives the right turn switch auxiliary contact recovery signal from the right turn switch, it delays for 1 second and then drives the right rearview mirror stepper motor to move, thereby driving the right rearview mirror to return to the current angle position recorded by the right rearview mirror angle encoder.

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