Automatic adjusting system and automatic adjusting method for automobile rearview mirror

Abstract

The invention discloses an automatic adjusting system and method for an automobile rearview mirror, and belongs to the field of automobile safe driving. The method comprises the steps that the current position of the rearview mirror is recorded through an angle encoder; the steering switch is shifted to close the auxiliary contact of the steering switch; after receiving a turning switch auxiliary contact closing signal, the CPU drives the stepping motor to act to drive the rearview mirror to rotate to 1 / 3 of a preset maximum angle position; after receiving a steering signal of the steering wheel steering switch, the CPU drives the stepping motor to act to drive the rearview mirror to rotate to a preset maximum angle position; after the automobile finishes steering, the steering wheel steering switch is automatically or manually returned, the automobile steering lamp deflector rod is automatically reset, and after receiving a steering switch auxiliary contact recovery signal, the CPU delays for 1 second and then drives the stepping motor to act to drive the rearview mirror to recover to the current angle position recorded by the rearview mirror angle encoder. The limit of the rearview mirror can be automatically adjusted, and the original variable function of the rearview mirror is fully played.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safe driving, and in particular relates to an automatic adjustment system and an automatic adjustment method for an automobile rearview mirror. Background Art

[0002] Regarding the blind spot problem of the left and right rearview mirrors in the current car adjustment: Usually, before driving, the driver adjusts the angles and positions of the left and right rearview mirrors according to his own height and the type of car, and does not adjust them during driving. The problems with this adjustment method are: Figure 1 As shown, the driver can only see part of the area on both sides of the car through the left and right rearview mirrors on both sides of the car, and cannot see the entire area on both sides of the car. There is a large blind spot, which poses a great safety hazard to the vehicle and the driver and passengers.

[0003] At present, regarding the adjustment method of the angle and position of the left and right rearview mirrors of a car, the left rearview mirror is generally adjusted as follows: the driver uses the horizon as a reference, and adjusts the up and down angles to make the rearview mirror present a picture of the sky and the ground each occupying half, and by adjusting the left and right angles, the range occupied by the vehicle body in the rearview mirror is adjusted to about 1 / 4. According to this adjustment method, when the vehicle drives from the auxiliary road to the left main road, the vehicles driving on the main road cannot be observed from the left rearview mirror, and there is a large blind spot on the left side. If the vehicle accelerates at a large angle and cuts into the rightmost lane of the main road, it is easy to collide with the vehicle driving at high speed in the rightmost lane of the main road. 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 it as much as possible for the side of the car body). The driver uses the horizon as a reference and adjusts the sky part of the right rearview mirror to occupy about 1 / 4 of the upper part of the rearview mirror, and the car body part to occupy about 1 / 4 of the left side of the rearview mirror. According to this adjustment method, when the vehicle drives from the main road to the auxiliary road, the vehicles traveling on the auxiliary road cannot be observed from the right rearview mirror. There is a large blind spot on the right side. If the vehicle accelerates at a large angle to cut into the auxiliary lane, it is easy to collide with a vehicle traveling at high speed in the auxiliary lane.

[0004] Under the existing conditions, in order to solve the above problems, there is a new adjustment method, which is to give full play to the original variable function of the rearview mirror and continue to extend the left and right rearview mirrors to the extreme position. This can minimize the left and right blind spots and reduce safety hazards as much as possible. Figure 2As shown. But the problem is that the driver cannot adjust the rearview mirror adjustment button in time during driving. If the adjustment is forced, it will distract the driver's attention and bring hidden dangers to safety. Even if the adjustment is forced, when the vehicle turns to normal driving, the rearview mirror needs to be adjusted to the normal driving position. If the driver turns his head to look sideways, he cannot see the vehicles coming from both sides because of the obstruction of the car body on both sides and the obstruction of the passenger seat and the back of the seat. This will also distract the driver's attention from the front and bring hidden dangers to safety. Summary of the invention

[0005] Therefore, in order to solve the problem of blind spots in the existing method for adjusting the angles and positions of the left and right rearview mirrors of an automobile, the present invention provides an automatic adjustment system and method for automobile rearview mirrors, and realize automatic limit adjustment of the left and right rearview mirrors, that is, to give full play to the original variable function of the rearview mirrors without distracting the driver's attention and without increasing the driver's extra operations.

[0006] In order to solve the above technical problems, the specific technical solutions adopted by the present invention are as follows:

[0007] The present invention provides an automatic adjustment system for a vehicle rearview mirror, 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] 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 are respectively connected to the CPU control board; the left rearview mirror angle encoder and the left rearview mirror stepper motor are respectively connected to the left rearview mirror, and the right rearview mirror angle encoder and the right rearview mirror stepper motor are respectively connected to the right rearview mirror; the left rearview mirror angle encoder and the right rearview mirror angle encoder are respectively used to receive the angle positions of the left and right rearview mirrors, and the CPU control board drives the left rearview mirror stepper motor and the right rearview mirror stepper motor to rotate according to the received angle positions and drives the left and right rearview mirrors to rotate to the specified angle positions;

[0011] A left turn switch and a right turn switch are connected to the CPU control board and the automobile turn signal control system respectively; the left turn switch is used to receive the left turn signal sent by the automobile turn signal control system, and send the left turn switch auxiliary contact closing signal and the left turn switch auxiliary contact recovery signal to the CPU control board according to the received left turn signal; the CPU control board drives the left rearview mirror stepper motor to operate according to the left turn switch auxiliary contact closing signal, and then drives the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position, and the CPU control board drives the left rearview mirror stepper motor to operate after a delay of 1 second according to the left turn switch auxiliary contact recovery signal, and then drives the left rearview mirror to recover to the left rear The current angle position recorded by the mirror angle encoder; the right turn switch is used to receive the right turn signal sent by the automobile turn signal control system, and sends the right turn switch auxiliary contact closure signal and the 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 operate according to the right turn switch auxiliary contact closure signal, and then drives the right rearview mirror to rotate to 1 / 3 of the preset maximum angle position, and the CPU control board drives the right rearview mirror stepper motor to operate after a delay of 1 second according to the right turn switch auxiliary contact recovery signal, and then drives the right rearview mirror to recover to the current angle position recorded by the right rearview mirror angle encoder;

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

[0013] Furthermore, the left turn switch and the right turn switch are installed on the turn signal lever of the automobile.

[0014] The present invention provides a method for automatically adjusting a rearview mirror of an automobile, which is implemented by using the automatic adjustment system for a rearview mirror of an automobile. The method comprises the following steps:

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

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

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

[0018] Step S3: pull the steering switch to close the steering switch auxiliary contact;

[0019] Step S4: When the CPU control board receives the auxiliary contact closure signal of the steering switch, it drives the stepping motor of the rearview mirror to operate, 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 steering switch, it drives the rearview mirror stepper motor to operate, thereby driving the rearview mirror to rotate to a preset maximum angle position;

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

[0022] Furthermore, in step S2, a left rearview mirror angle encoder is used to record the current angle position of the left rearview mirror, and a right rearview mirror angle encoder is used to record the current angle position of the right rearview mirror.

[0023] Further, 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 left steering switch auxiliary contact closure signal of the left steering switch, it drives the left rearview mirror stepper motor to operate, and then drives the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position; when the CPU control board receives the right steering switch auxiliary contact closure signal of the right steering switch, it drives the right rearview mirror stepper motor to operate, and then drives the right rearview mirror to rotate the current angle to 1 / 3 of the preset maximum angle position.

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

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

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides an automatic adjustment system for a rearview mirror of an automobile. In order to realize the automatic adjustment function of the rearview mirror, first, after receiving the turn signal of the turn signal lever of the automobile, the CPU control board drives the stepper motor of the rearview mirror at a small angle, then waits for the steering wheel of the automobile to turn, and then drives the stepper motor of the rearview mirror to rotate to the preset maximum angle position. After the automobile completes the turn, the turn signal lever of the automobile returns to the normal position, and drives the stepper motor of the rearview mirror and the rearview mirror to rotate to the original position at the same time. The present invention adds an auxiliary opening and closing contact to the original steering switch, monitors the angle change of the automobile steering wheel, determines the angle and position of the stepper motor of the rearview mirror, adjusts the rotation angle and reset position of the stepper motor of the rearview mirror through the rearview mirror angle encoder, and completes the increase and adjustment of the range of the rearview mirror required for large-angle steering.

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

[0030] 1. After installing the automatic adjustment system for automobile rearview mirrors provided by the present invention, the original functions of the automobile will not be affected. This is because, although the system of the present invention is installed on the automobile turn signal control system, it is a new system independent of the automobile turn signal control system and does not affect the original functions of the automobile turn signal control system.

[0031] 2. After installing the automatic adjustment system for automobile rearview mirrors provided by the present invention, the original variable functions of the left and right rearview mirrors of the automobile can be brought into play to the maximum extent. Currently, the driver adjusts the angles and positions of the left and right rearview mirrors before driving. Generally, they are no longer changed after driving. This adjustment method does not give full play to the original variable functions of the rearview mirrors. After installing the system of the present invention, the left and right rearview mirrors will automatically adjust the angles and positions of the rearview mirrors as the turn signal lever of the automobile moves up and down, which can maximize the original variable functions of the left and right rearview mirrors and minimize the driver's blind spot.

[0032] 3. The automatic adjustment system for rearview mirrors provided by the present invention has a simple installation process. The system of the present invention is small in size and can be installed in the extra space in the protective cover under the steering wheel of the car without affecting the original interior appearance of the car. In addition to adding control to the left and right rearview mirror motor steering systems, it does not affect the original circuit system of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the blind spots of the left and right rearview mirrors under normal driving conditions (the black area is the blind spot).

[0034] Figure 2 Schematic diagram of the blind spot when the right rearview mirror is extended to the extreme position (the black area is the blind spot).

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

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

[0037] In order to enable technicians in this field to better understand the technical solution of this patent, this patent will be further described in detail below in conjunction with the accompanying drawings.

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

[0039] like Figure 3 As shown, the present invention provides an automatic adjustment system for a vehicle rearview mirror, which is mainly composed 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 steering switch 7, right steering switch 8 and steering wheel steering switch 9.

[0041] The function switch 1 is connected to the CPU control board 2, and the function switch 1 is mainly used to start and shut down the system.

[0042] The left rearview mirror angle encoder 3, the right rearview mirror angle encoder 4, the left rearview mirror stepper motor 5, and the right rearview mirror stepper motor 6 are connected to the CPU control board 2 respectively. 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. Among them, the CPU control board 2 is mainly used to realize the signal receiving, 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, and 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] The left turn switch 7 and the right turn switch 8 are connected to the CPU control board 2 and the automobile turn signal control system, respectively. The left turn switch 7 and the right turn switch 8 can be installed on the automobile turn signal lever. The left turn switch 7 is mainly used to receive the left turn signal rotation signal sent by the automobile turn signal control system, and sends the left turn switch auxiliary contact closing signal and the left turn switch auxiliary contact recovery signal to the CPU control board 2 according to the received left turn signal rotation signal. The right turn switch 8 is mainly used to receive the right turn signal rotation signal sent by the automobile turn signal control system, and sends the right turn switch auxiliary contact closing signal and the right turn switch auxiliary contact recovery signal to the CPU control board 2 according to the received right turn signal rotation signal. When the CPU control board 2 receives the left steering switch auxiliary contact closing signal of the left steering switch 7, the left rearview mirror stepper motor 5 can be driven 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 right steering switch auxiliary contact closing signal of the right steering switch 8, the right rearview mirror stepper motor 6 can be driven to operate, thereby driving the right rearview mirror 11 to rotate the existing angle to 1 / 3 of the preset maximum angle position. When the CPU control board 2 receives the left steering switch auxiliary contact recovery signal of the left steering switch 7, after a delay of 1 second, the left rearview mirror stepper motor 5 is driven to operate, thereby driving the left rearview mirror 10 to restore to the current angle position recorded by the left rearview mirror angle encoder 3; when the CPU control board 2 receives the right steering switch auxiliary contact recovery signal of the right steering switch 8, after a delay of 1 second, the right rearview mirror stepper motor 6 is driven to operate, thereby driving the right rearview mirror 11 to restore to the current angle position recorded by the right rearview mirror angle encoder 4.

[0044] The steering wheel steering switch 9 is connected to the CPU control board 2. The steering wheel steering switch 9 is mainly used to receive the steering wheel rotation signal of the car, and send a steering signal to the CPU control board 2 according to the steering wheel rotation signal of the car. When the CPU control board 2 receives the left rotation signal of the steering wheel steering switch 9, it drives the left rearview mirror stepper motor 5 to operate, and then drives the left rearview mirror 10 to rotate to a preset maximum angle position; when the CPU control board 2 receives the right rotation signal of the steering wheel steering switch 9, it drives the right rearview mirror stepper motor 6 to operate, and then drives the right rearview mirror 11 to rotate to a preset maximum angle position.

[0045] Under the existing conditions, the automatic adjustment system for automobile rearview mirrors provided by the present invention is an additional synchronization system of the existing automobile turn signal control system. The automatic adjustment system for automobile rearview mirrors provided by the present invention can automatically adjust the angle position of the left and right rearview mirrors while the automobile turn signal lever is moved up and down.

[0046] The working principle of the automatic adjustment system for automobile rearview mirror provided by the present 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 car turn signal lever 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 car turn signal lever will automatically reset and the right rearview mirror 11 will automatically return to its original position.

[0048] In a second aspect, the present invention provides an automatic adjustment method for a vehicle rearview mirror, and the adjustment method is mainly implemented by an automatic adjustment system for a vehicle rearview mirror provided in the first aspect.

[0049] The present invention provides a method for automatically adjusting a rearview mirror of an automobile, and the specific implementation process thereof is as follows:

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

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

[0052] Specifically, the left rearview mirror angle encoder 3 can be used to record the current angle position of the left rearview mirror 10, and the right rearview mirror angle encoder 4 can be used to record the current angle position of the right rearview mirror 11;

[0053] Step S3: pull the steering switch to close the steering switch auxiliary contact;

[0054] Specifically, pulling the left turn switch 7 can close the auxiliary contact of the left turn switch, and pulling the right turn switch 8 can close the auxiliary contact of the right turn switch;

[0055] Step S4: When the CPU control board 2 receives the auxiliary contact closing signal of the steering switch, it drives the stepping motor of the rearview mirror to operate, and then drives 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 steering switch auxiliary contact closing signal of the left steering switch 7, it can drive the left rearview mirror stepper motor 5 to operate, and then drive 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 right steering switch auxiliary contact closing signal of the right steering switch 8, it can drive the right rearview mirror stepper motor 6 to operate, and then drive the right rearview mirror 11 to rotate the existing 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 steering switch 9, it drives the rearview mirror stepper motor to operate, thereby driving the rearview mirror to rotate to a preset maximum angle position;

[0059] Specifically, when the CPU control board 2 receives the left turn signal from the steering wheel switch 9, it drives the left rearview mirror stepper motor 5 to operate, thereby driving the left rearview mirror 10 to rotate to a 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 operate, thereby driving the right rearview mirror 11 to rotate to a preset maximum angle position;

[0061] Step S6: After the car completes the turn, the steering wheel steering switch 9 automatically or manually returns to the center, the car turn signal lever automatically resets, and the CPU control board 2 receives the auxiliary contact restoration signal of the steering switch, and after a delay of 1 second, drives the rearview mirror stepper motor to operate, and then drives 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 steering switch 9 automatically or manually returns to the center, the car turn signal lever automatically resets, and the CPU control board 2 receives the left steering switch auxiliary contact recovery signal of the left steering switch 7, and after a delay of 1 second, drives the left rearview mirror stepper motor 5 to operate, and then drives 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 steering switch 9 automatically or manually returns to the center, the car turn signal lever automatically resets, and the CPU control board 2 receives the right steering switch auxiliary contact recovery signal of the right steering switch 8, and after a delay of 1 second, drives the right rearview mirror stepper motor 6 to operate, and then drives the right rearview mirror 11 to return to the current angle position recorded by the right rearview mirror angle encoder 4;

[0064] Step S7: The operation is completed.

[0065] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic adjustment system for a rearview mirror of a vehicle, 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; 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 are respectively connected to the CPU control board; the left rearview mirror angle encoder and the left rearview mirror stepper motor are respectively connected to the left rearview mirror, and the right rearview mirror angle encoder and the right rearview mirror stepper motor are respectively connected to the right rearview mirror; the left rearview mirror angle encoder and the right rearview mirror angle encoder are respectively used to receive the angle positions of the left and right rearview mirrors, and the CPU control board drives the left rearview mirror stepper motor and the right rearview mirror stepper motor to rotate according to the received angle positions and drives the left and right rearview mirrors to rotate to the specified angle positions; A left turn switch and a right turn switch are connected to the CPU control board and the automobile turn signal control system respectively; the left turn switch is used to receive the left turn signal sent by the automobile turn signal control system, and send the left turn switch auxiliary contact closing signal and the left turn switch auxiliary contact recovery signal to the CPU control board according to the received left turn signal; the CPU control board drives the left rearview mirror stepper motor to operate according to the left turn switch auxiliary contact closing signal, and then drives the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position, and the CPU control board drives the left rearview mirror stepper motor to operate after a delay of 1 second according to the left turn switch auxiliary contact recovery signal, and then drives the left rearview mirror to recover to the left rear The current angle position recorded by the mirror angle encoder; the right turn switch is used to receive the right turn signal sent by the automobile turn signal control system, and sends the right turn switch auxiliary contact closure signal and the 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 operate according to the right turn switch auxiliary contact closure signal, and then drives the right rearview mirror to rotate to 1 / 3 of the preset maximum angle position, and the CPU control board drives the right rearview mirror stepper motor to operate after a delay of 1 second according to the right turn switch auxiliary contact recovery signal, and then drives the right rearview mirror to recover to the current angle position recorded by the right rearview mirror angle encoder; A steering wheel steering switch connected to the CPU control board; the steering wheel steering switch is used to receive a steering wheel rotation signal of the car, and send a steering signal to the CPU control board according to the steering wheel rotation signal of the car. After receiving the rotation signal of the steering wheel steering switch, the CPU control board drives the left rearview mirror stepper motor and the right rearview mirror stepper motor to operate, and then drives the left and right rearview mirrors to rotate to a preset maximum angle position.

2. The automatic adjustment system for a rearview mirror of a vehicle according to claim 1, characterized in that: The left turn switch and the right turn switch are installed on the automobile turn signal lever.

3. A method for automatically adjusting a rearview mirror of a vehicle, characterized in that: The method is implemented by using the automatic adjustment system for automobile rearview mirror according to claim 1, and comprises the following steps: Step S1: Turn on the function switch to start the system; Step S2: using a rearview mirror angle encoder to record the current angle position of the rearview mirror; Step S3: pull the steering switch to close the steering switch auxiliary contact; Step S4: When the CPU control board receives the auxiliary contact closure signal of the steering switch, it drives the stepping motor of the rearview mirror to operate, 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 steering switch, it drives the rearview mirror stepper motor to operate, thereby driving the rearview mirror to rotate to a preset maximum angle position; Step S6: After the car completes the turn, the steering wheel steering switch automatically or manually returns to the center position, the car turn signal lever automatically resets, and the CPU control board receives the auxiliary contact recovery signal of the steering switch. After a delay of 1 second, it drives the rearview mirror stepper motor to operate, and then drives the rearview mirror to return to the current angle position recorded by the rearview mirror angle encoder.

4. The method for automatically adjusting a rearview mirror of a vehicle according to claim 1, characterized in that: In step S2, the left rearview mirror angle encoder is used to record the current angular position of the left rearview mirror, and the right rearview mirror angle encoder is used to record the current angular position of the right rearview mirror.

5. The method for automatically adjusting a rearview mirror of a vehicle according to claim 1, characterized in that: In step S3, the left steering switch is turned to close the auxiliary contact of the left steering switch, and the right steering switch is turned to close the auxiliary contact of the right steering switch.

6. The method for automatically adjusting a rearview mirror of a vehicle according to claim 1, characterized in that: In step S4, when the CPU control board receives the left steering switch auxiliary contact closure signal of the left steering switch, it drives the left rearview mirror stepper motor to operate, and then drives the left rearview mirror to rotate to 1 / 3 of the preset maximum angle position; when the CPU control board receives the right steering switch auxiliary contact closure signal of the right steering switch, it drives the right rearview mirror stepper motor to operate, and then drives the right rearview mirror to rotate the current angle to 1 / 3 of the preset maximum angle position.

7. The method for automatically adjusting a rearview mirror of a vehicle according to claim 1, characterized in that: In step S5, when the CPU control board receives the left turn signal from the steering wheel steering switch, it drives the stepper motor of the left rearview mirror to operate, and then drives the left rearview mirror to rotate to a preset maximum angle position; when the CPU control board receives the right turn signal from the steering wheel steering switch, it drives the stepper motor of the right rearview mirror to operate, and then drives the right rearview mirror to rotate to a preset maximum angle position.

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

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