Method and system for controlling dimming glass linked with vehicle driving state

Abstract

The invention belongs to the technical field of automobile industry, and particularly discloses a dimming glass control method and system linked with a vehicle driving state, and the method comprises the steps: carrying out initial light transmission adjustment and secondary light transmission gear adjustment on a glass diaphragm; the system comprises a dimming glass controller, a power supply, a light intensity sensor, a chassis domain controller and glass diaphragms of all areas of a vehicle. Through cooperative work of the light intensity sensor, the chassis domain controller, the dimming glass controller and the glass diaphragms in all the areas, accurate control over the transparency of the glass diaphragms is achieved, and the light transmittance of the vehicle window can be intelligently adjusted according to the driving state of the vehicle and the environment illumination condition. When the vehicle is in a normal driving state, the light transmittance of the vehicle window is adaptive to the input value of the sunlight sensor; when the vehicle turns, the vehicle window on the corresponding side can automatically become transparent; and if the vehicle is in the backing state, the vehicle windows on the two sides automatically become transparent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of the automobile industry, in particular to a light control method and system for light control glass associated with the driving state of a vehicle. BACKGROUND

[0002] With the development of intelligent automobile technology, light control glass has gradually become mainstream due to its multifunctionality. It not only improves the aesthetic design of the vehicle, but also provides privacy protection, practicality, entertainment and safety. The main light control mechanism of light control glass is liquid crystal polymer added in the glass interlayer. In the absence of an electric field, liquid crystal molecules are freely dispersed, and the glass is opaque. In the powered state, the liquid crystal molecules are regularly arranged, and the light can pass through the glass, and the glass is transparent.

[0003] Under the general trend of the development of electric vehicles, automobile intelligence has developed at full speed. In order to improve the in-vehicle driving experience while not affecting the overall appearance of the vehicle, more and more new energy vehicle models choose to be equipped with light control glass. Light control glass refers to the installation of a film structure in the middle of the automobile glass, and the glass can be controlled by applying voltage to achieve intelligent adjustment of light.

[0004] Most existing light control glass systems can only adjust the light transmittance according to the change of ambient light, and cannot intelligently adjust according to the actual driving state of the vehicle, which limits the application range and effect of light control glass to some extent. SUMMARY

[0005] The purpose of the present application is to solve the technical problems in the background art. To this end, a light control method and system for light control glass associated with the driving state of a vehicle are provided.

[0006] In order to achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows: The light control method for light control glass associated with the driving state of a vehicle comprises the following steps: Step 101: The light intensity sensor obtains a plurality of light input values corresponding to the sky screen directly in front of the vehicle, the front left and right sides, and the rear left and right sides; Step 102: The light control controller adjusts the initial light transmittance of the glass film according to the plurality of light input values and the initial light transmittance of the light control glass; Step 103: Real-time acquisition of the relevant start signal of the user's gear after the vehicle starts, and acquisition of the vehicle speed and steering angle under the relevant start signal; Step 104: According to the vehicle speed threshold and / or steering angle threshold of the user's gear and the preset gear light control condition and threshold mapping library, it is judged whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold; If the light intensity value is less than the preset threshold value, the light intensity value is compared with the preset threshold value, and if the light intensity value is greater than the preset threshold value, the light intensity value is compared with the preset threshold value.

[0007] The following is a further defined technical solution of the application, the light transmittance gear of the dimming glass is divided according to the light value, and the light transmittance gear of the dimming glass is combined with the selected light intensity sensor and the characteristics of the glass film to establish a light transmittance gear threshold value mapping library.

[0008] The following is a further defined technical solution of the application, the light value interval is 0-65535 lux, and the light transmittance gear of the dimming glass includes 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%.

[0009] The following is a further defined technical solution of the application, the secondary light transmittance gear adjustment has three modes, which are left side transparent mode, right side transparent mode and left and right side transparent mode.

[0010] The dimming glass control system linked with the vehicle driving state is used to realize the dimming glass control method linked with the vehicle driving state, comprising: The dimming glass controller, the power supply, the light intensity sensor, the chassis domain controller and the glass film of each area of the vehicle; The dimming glass controller controls the light transmittance of the dimming glass through the MOS switch driver according to the received light intensity and vehicle driving state information; The light intensity sensor is used to obtain the light input value of each direction of the vehicle and transmit the light input value to the dimming glass controller; The chassis domain controller is used to monitor the vehicle speed, steering angle and actual gear to obtain the related start signal; The glass film is arranged in the front sky screen, the front left and right sides or the rear left and right sides of the vehicle body and is electrically connected with the output port of the dimming glass controller; The power supply is used to provide 12V DC power and supply power to the dimming glass controller through the power filter.

[0011] The following is a further defined technical solution of the application, the glass film is controlled by zoning, receives the dimming instruction of the dimming glass controller and adjusts the glass transmittance.

[0012] The following is a further defined technical solution of the application, the chassis domain controller communicates with the dimming glass controller through the CAN node and provides the vehicle driving state information.

[0013] The following is a further limited technical solution of the application, the ambient light is received through the optical filter, the photodiode in the light intensity sensor converts the received light into a current signal, the analog signal is converted into a digital signal through the analog-to-digital converter, and the transceiver sends it to the dimming glass controller.

[0014] The following is a further limited technical solution of the application, and further comprises a gateway controller, which is electrically connected with the light intensity sensor.

[0015] Compared with the prior art, the application has the following technical effects: The light intensity sensor, the chassis area controller, the dimming glass controller and the glass film of each area work cooperatively to realize accurate control of the permeability of the glass film, and the light transmittance of the vehicle window can be intelligently adjusted according to the driving state of the vehicle and the environmental light conditions. When the vehicle is in a normal driving state, the light transmittance of the vehicle window is self-adaptive to the input value of the sunlight sensor; when the vehicle is turning, the vehicle window on the corresponding side can be automatically changed to be transparent; if the vehicle is in a reversing state, the vehicle windows on both sides are automatically changed to be transparent.

[0016] The application will be further described below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0018] Figure 1 is a method flowchart of the application; Figure 2 is a system connection relationship diagram of the application. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the application, therefore the application is not limited by the specific embodiments disclosed below.

[0020] The embodiment provides a dimming glass control method and a dimming glass control system associated with the driving state of a vehicle.

[0021] As Figure 1As shown, the light control method linked with the vehicle driving state specifically includes the following steps: Step 101: The light intensity sensor obtains a plurality of light input values corresponding to the sky dome directly in front of the vehicle, the front left and right sides, and the rear left and right sides.

[0022] Step 102: The light control controller adjusts the initial light transmittance of the glass film according to the plurality of light input values and the initial light transmittance gear of the light control glass.

[0023] The light transmittance gear of the light control glass is determined according to the light value, and a light transmittance gear and light value threshold mapping library is established in combination with the selected light intensity sensor and the characteristics of the glass film. The light value interval is 0-65535 lux, and the light transmittance gear of the light control glass includes 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%.

[0024] Step 103: Real-time acquisition of the relevant start signal of the user's gear selection after the vehicle starts, and acquisition of the vehicle speed and steering angle under the relevant start signal.

[0025] Step 104: According to the vehicle speed threshold and / or steering angle threshold under the user's gear selection, and the preset gear light control condition and threshold mapping library, it is judged whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold. If so, according to the difference between the preset gear light control condition and threshold and the initial light adjustment corresponding gear light, the light control parameters of the sky dome directly in front of the vehicle, the front left and right sides, or the rear left and right sides are determined, and then the light control parameters are used to generate light control instructions to adjust the initial light adjustment to the second light gear adjustment.

[0026] The preset gear is determined according to the light value 0-65535 lux input by each region, and the light transmittance gear 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% are determined. For example, when the light value is 0-100 lux, the light transmittance gear is 0%, and when the light value is 30000-65535 lux, the light transmittance gear is 100%. The corresponding results of the light value and the gear are the fitting curve obtained by a large amount of data collection, and the threshold mapping library is constructed after repeated verification. It should be noted that the threshold mapping of the threshold mapping library is related to the characteristics of the light intensity sensor and the characteristics of the glass film, so when the light intensity sensor and the glass film are selected, the corresponding threshold mapping library is determined.

[0027] The mapping relationship between the vehicle speed threshold and / or steering angle threshold under the user's gear selection and the preset gear light control threshold mapping library is as follows: The user selects R gear, the vehicle speed is true and greater than or equal to 0 km / h, the steering angle is not considered, and the preset gear light transmittance is determined according to the light value: the light-adjustable glass corresponding to the left and right sides of the front of the vehicle is adjusted, and the light transmittance is adjusted to 100%.

[0028] The user selects D gear, the vehicle speed is true and greater than or equal to 0 km / h, the steering angle is true and greater than or equal to zero, and the preset gear light transmittance is determined according to the light value: according to the steering direction determined by the steering angle, the light-adjustable glass corresponding to the right side is adjusted, and the light transmittance is adjusted to 100%.

[0029] The user selects D gear, the vehicle speed is true and greater than or equal to 0 km / h, the steering angle is true and less than or equal to zero, and the preset gear light transmittance is determined according to the light value: according to the steering direction determined by the steering angle, the light-adjustable glass corresponding to the left side is adjusted, and the light transmittance is adjusted to 100%.

[0030] When and only when the above conditions are met, the glass film is adjusted for secondary light transmittance, and the remaining conditions are temporarily not considered. When any of the above conditions is not met, the secondary light transmittance adjustment is closed after 3 seconds, and the primary adjustment based on the light intensity is restored.

[0031] The secondary light transmittance adjustment has three modes, namely: left transmittance mode, right transmittance mode and left and right transmittance mode. It should be noted that the transmittance mode is that the light-adjustable glass controller outputs a control instruction to adjust the glass light transmittance on the corresponding side to 100%.

[0032] Left transmittance mode is opened: Condition 1: The vehicle ready state is turned on (i.e. the vehicle high voltage signal is on), and the left turn signal state is ON; Condition 2: The current actual gear of the vehicle is D gear, and the actual speed value is greater than 1 km / h, and the left steering angle is greater than 10 degrees; When any of conditions 1 or 2 is met, the secondary light transmittance adjustment is opened, and the left glass light transmittance is adjusted to 100%.

[0033] Left transmittance mode is closed: When any of the conditions in condition 1 or any of the conditions in condition 2 is not met, the secondary light transmittance adjustment is closed, and the primary adjustment based on the light intensity is restored.

[0034] Right transmittance mode is opened: Condition 1: The vehicle ready state is turned on (i.e. the vehicle high voltage signal is on), and the right turn signal state is ON; Condition 2: The current actual gear of the vehicle is D gear, and the actual speed value is greater than 1 km / h, and the right steering angle is greater than 10 degrees; When either Condition 1 or Condition 2 is met, the secondary light transmittance adjustment is turned on, and the right glass light transmittance is adjusted to 100%.

[0035] Right side transmittance mode off: When either Condition 1 or Condition 2 is not met, the secondary light transmittance adjustment is turned off, and the primary adjustment gear based on light intensity judgment is restored.

[0036] Left and right side transmittance mode on: Condition 1: Vehicle ready state is on (i.e., high voltage signal on the vehicle); Condition 2: The current actual gear of the vehicle is R gear; Condition 3: The actual value of vehicle speed is greater than 1 km / h.

[0037] When Conditions 1, 2, and 3 are all met and last for 1s, the dimming glass controller outputs control instructions to turn on the left and right side transmittance mode, and adjust the left and right side glass light transmittance to 100%.

[0038] Left and right side transmittance mode off: When any of Conditions 1, 2, and 3 is not met, the secondary light transmittance adjustment is turned off, and the primary adjustment gear based on light intensity judgment is restored.

[0039] As shown in FIG. 1, the dimming glass control system associated with the vehicle driving state mainly consists of a dimming glass controller, a power supply, a light intensity sensor, a chassis domain controller, and vehicle glass films in different areas. Figure 2 The dimming glass controller, as the core of the system, is responsible for receiving and processing signals from different modules and outputting dimming instructions according to these signals. Specifically: according to the received light intensity and vehicle driving state information, the light transmittance of the dimming glass is controlled through the MOS switch driver.

[0040] The light intensity sensor is used to obtain the light input values of the vehicle in different directions and transmit these values to the dimming glass controller. The light intensity sensor is connected to the third input interface of the dimming glass controller through the LIN bus. The light intensity sensor receives ambient light intensity, receives ambient light through an optical filter, and converts it into an electrical signal. The photodiode in the light intensity sensor converts the received light into a current signal, and then converts the analog signal into a digital signal through an analog-to-digital converter (ADC). The digital signal is sent to the dimming glass controller through a transceiver. The sensor is connected to the third input interface of the dimming glass controller.

[0041] ​

[0042] The chassis domain controller monitors the vehicle speed, steering angle, and actual gear position to obtain relevant start signals. The chassis domain controller is connected to the fourth and fifth input interfaces of the dimming glass controller through the CAN bus. The chassis domain controller communicates with the dimming glass controller through the CAN node to provide vehicle driving state information such as vehicle speed and steering angle.

[0043] The glass film is arranged in the front, left and right, or rear left and right of the vehicle body and is electrically connected to the output port of the dimming glass controller. The glass film uses zone control and is connected to the sixth and seventh input interfaces of the dimming glass controller to receive dimming instructions from the dimming glass controller and adjust the glass transmittance.

[0044] The power supply provides 12V DC power to power the dimming glass controller through the power filter to ensure stable operation of the system. The first and second input interfaces of the dimming glass controller are connected.

[0045] The control system further includes a gateway controller electrically connected to the light intensity sensor for enhancing the stability and reliability of signal transmission.

[0046] The working process of the present embodiment will be further described as follows: When the ambient light changes, the light intensity sensor detects the change in light intensity and filters out unwanted wavelengths through the optical filter, and then converts the optical signal to an electrical signal through photoelectric conversion.

[0047] The electrical signal is converted to a digital signal through ADC and sent to interface 3 of the dimming glass controller through the Transceiver.

[0048] After receiving the signal, the dimming glass controller sends dimming instructions to the dimming glass through interface 6 according to the preset dimming logic and mapping library.

[0049] If the vehicle is in a steering or reversing state, the chassis domain controller sends vehicle state information to the dimming glass controller through interface 4.

[0050] The dimming glass controller controls the MOS switch driver through interface 7 according to the vehicle state and light intensity information to achieve secondary adjustment of the light transmittance of the dimming glass.

[0051] When steering, the controller may activate the left or right transmittance mode, so that the corresponding side of the glass transmittance is adjusted to 100% to improve the driver's field of view.

[0052] When reversing, the controller activates the left and right transmittance modes, so that the transmittance of both sides of the glass is adjusted to 100% to provide a better rear view.

[0053] All these operations are realized through the logic processing inside the dimming glass controller and the communication with the MCU, ensuring that the light transmittance of the dimming glass can be intelligently adjusted according to the actual driving state of the vehicle and the ambient light conditions.

[0054] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments, without departing from the scope of the technical solutions of the present application, by using the disclosed methods and technical contents. Therefore, equivalent changes made according to the shape, structure and principle of the present application, without departing from the technical solutions of the present application, should be covered by the protection scope of the present application.

Claims

1. A method for controlling dimming glass in conjunction with the vehicle's driving status, characterized in that, Includes the following steps: Step 101: The light intensity sensor acquires multiple light input values ​​corresponding to the sunroof directly in front of the vehicle, the left and right sides in front, and the left and right sides behind; Step 102: The dimming glass controller adjusts the initial light transmittance of the glass film based on multiple light input values ​​and the initial dimming glass transmittance setting. Step 103: Real-time acquisition of relevant start signals after the user engages gears after the vehicle starts, and acquisition of vehicle speed and steering angle under relevant start signals; Step 104: Based on the vehicle speed threshold and / or steering angle threshold under user gear shift, the preset gear dimming conditions, and the threshold mapping library, determine whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold. If the limit is exceeded, the difference between the preset dimming conditions and threshold and the dimming level corresponding to the initial light transmission adjustment is used to determine the dimming parameters for adjusting the sunroof in front of the vehicle, the left and right sides in front, or the left and right sides behind, and the corresponding dimming parameters. Then, a dimming command is generated based on the dimming parameters to perform a secondary light transmission adjustment on the initial light transmission adjustment.

2. The dimming glass control method linked to vehicle driving status as described in claim 1, characterized in that, The transmittance levels of the dimming glass are determined based on the illumination value, and a mapping library between the transmittance levels of the dimming glass and the illumination value threshold is established by combining the characteristics of the selected light intensity sensor and the glass film.

3. The dimming glass control method linked to vehicle driving status as described in claim 2, characterized in that, The illuminance range is 0~65535 lux, and the light transmittance levels of the dimming glass include 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%.

4. The dimming glass control method linked to vehicle driving status as described in claim 1, characterized in that, The secondary light transmission level adjustment has three modes: left side light transmission mode, right side light transmission mode, and both sides light transmission mode.

5. A dimming glass control system linked to the vehicle's driving state, used to implement the dimming glass control method linked to the vehicle's driving state as described in any one of claims 1-4, characterized in that, include: Dimming glass controller, power supply, light intensity sensor, chassis domain controller, and glass films in various areas of the vehicle; The dimming glass controller controls the light transmittance of the dimming glass through a MOS switch driver based on the received light intensity and vehicle driving status information. A light intensity sensor is used to acquire the light input value from all directions of the vehicle and transmit the light input value to the dimming glass controller; The chassis domain controller is used to monitor the vehicle's speed, steering angle, and actual gear position to obtain relevant start signals; The glass diaphragm is placed on the front sunroof, the front left and right sides, or the rear left and right sides of the vehicle body, and is electrically connected to the output port of the dimming glass controller. The power supply provides 12V DC power to the dimming glass controller via a power filter.

6. The dimming glass control system linked to the vehicle's driving state as described in claim 5, characterized in that, The glass diaphragm uses zone control and receives dimming commands from the dimming glass controller to adjust the glass transmittance.

7. The dimming glass control system linked to the vehicle's driving state as described in claim 5, characterized in that, The chassis domain controller communicates with the dimming glass controller via a CAN node to provide vehicle driving status information.

8. The dimming glass control system linked to the vehicle's driving state as described in claim 5, characterized in that, Ambient light is received through an optical filter, and the photodiode in the light intensity sensor converts the received light into a current signal. The analog signal is then converted into a digital signal by an analog-to-digital converter and sent to the dimming glass controller via a transceiver.

9. The dimming glass control system linked to the vehicle's driving state as described in claim 5, characterized in that, It also includes a gateway controller, which is electrically connected to the light intensity sensor.

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