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 invention relates to the technical field of automobile industry, and in particular to a dimming glass control method and system linked to the driving state of a vehicle. Background Art

[0002] With the development of smart car technology, dimming glass has gradually become mainstream due to its versatility. It not only enhances the aesthetic design of the vehicle, but also provides privacy protection, practicality, entertainment and safety. The main dimming mechanism of dimming glass is the liquid crystal polymer added to the glass interlayer. In the absence of an electric field, the liquid crystal molecules are freely dispersed and the glass appears opaque; in the power-on state, the liquid crystal molecules are regularly arranged, allowing light to pass through the glass, and the glass appears transparent.

[0003] With the development trend of electric vehicles, the intelligentization of automobiles has been developing at full speed. In order to improve the in-car driving experience without affecting the appearance of the vehicle, more and more new energy models choose to be equipped with dimming glass. Dimming glass refers to a glass product that can achieve intelligent adjustment of light by adding a membrane structure in the middle of the car glass and then controlling the glass by applying voltage.

[0004] Most existing dimming glass systems can only adjust the transmittance according to changes in ambient light, and cannot be intelligently adjusted according to the actual driving status of the vehicle. This limits the application scope and effect of dimming glass to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a dimming glass control method and system linked to the driving state of a vehicle are provided.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A dimming glass control method linked to a vehicle driving state comprises the following steps:

[0008] Step 101: A light intensity sensor obtains a plurality of light input values ​​corresponding to the skylight directly in front of the vehicle, the left and right sides in front, and the left and right sides in the rear;

[0009] Step 102: the dimming glass controller performs initial light transmittance adjustment on the glass film according to a plurality of light input values ​​and an initial light transmittance position of the dimming glass;

[0010] Step 103: obtaining in real time a relevant start signal of the user shifting gears after the vehicle is started, and obtaining the vehicle speed and steering angle under the relevant start signal;

[0011] Step 104: judging whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold according to the vehicle speed threshold and / or steering angle threshold when the user engages a gear, the preset gear dimming condition and the threshold mapping library;

[0012] If it exceeds, the adjustment of the skylight in front of the vehicle, the left and right sides in front, or the left and right sides in the rear and the corresponding dimming parameters are determined based on the preset gear dimming conditions and thresholds and the difference between the gear dimming conditions and the initial light transmittance adjustment, and then the dimming instructions are generated based on the dimming parameters to perform a secondary light transmittance gear adjustment on the initial light transmittance adjustment.

[0013] The following is a technical solution further defined by the present invention. The light transmittance level of the dimming glass is defined according to the illumination value, and a mapping library of the light transmittance level of the dimming glass and the illumination value threshold is established in combination with the characteristics of the selected light intensity sensor and the glass membrane.

[0014] The following is a technical solution further defined by the present invention, the illumination value range is 0 to 65535 lux, and the light transmittance levels of the dimming glass include 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%.

[0015] The following is a technical solution further defined by the present invention. The secondary light transmission gear adjustment has three modes, namely: left-side transparent mode, right-side transparent mode, and left-right transparent mode.

[0016] The dimming glass control system linked to the vehicle driving state is used to implement the above-mentioned dimming glass control method linked to the vehicle driving state, including:

[0017] Dimming glass controller, power supply, light intensity sensor, chassis domain controller and glass membranes in various areas of the vehicle;

[0018] 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 status information;

[0019] Light intensity sensor, used to obtain light input values ​​from all directions of the vehicle and transmit the light input values ​​to the dimming glass controller;

[0020] The chassis domain controller is used to monitor the vehicle's speed, steering angle and actual gear position to obtain relevant start signals;

[0021] The glass membrane is arranged on the skylight in front of the vehicle body, on the left and right sides in front, or on the left and right sides in the rear, and is electrically connected to the output port of the dimming glass controller;

[0022] The power supply is used to provide 12V DC power to power the dimming glass controller through a power filter.

[0023] The following is a technical solution further defined by the present invention, in which the glass membrane adopts zone control, receives dimming instructions from a dimming glass controller, and adjusts the glass transmittance.

[0024] The following is a technical solution further defined in the present invention: the chassis domain controller communicates with the dimming glass controller through a CAN node to provide vehicle driving status information.

[0025] The following is a technical solution further defined by the present invention, in which ambient light is received through an 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 an analog-to-digital converter, and sent to the dimming glass controller through a transceiver.

[0026] The following is a technical solution further defined by the present invention, which also includes a gateway controller, and the gateway controller is electrically connected to the light intensity sensor.

[0027] Compared with the prior art, the present invention has the following technical effects:

[0028] The present invention realizes precise control of the transparency of the glass membrane through the coordinated work of the light intensity sensor, chassis domain controller, dimming glass controller and glass membranes in each area, and can intelligently adjust the light transmittance of the window according to the driving state of the vehicle and the ambient light conditions. When the vehicle is in a normal driving state, the light transmittance of the window is adaptive to the input value of the sunlight sensor; when the vehicle turns, the window on the corresponding side can automatically become transparent; if the vehicle is in a reverse state, the windows on both sides will automatically become transparent.

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic flow chart of the method of the present invention;

[0032] Figure 2 It is a system connection relationship diagram of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] This embodiment provides a dimming glass control method linked to a vehicle driving state and a dimming glass control system linked to a vehicle driving state.

[0035] like Figure 1 As shown, the dimming glass control method linked with the vehicle driving state specifically includes the following steps:

[0036] Step 101: The light intensity sensor obtains a plurality of light input values ​​corresponding to the skylight directly in front of the vehicle, the left and right sides in front, and the left and right sides in the rear.

[0037] Step 102: The dimming glass controller performs initial light transmittance adjustment on the glass film according to a plurality of light input values ​​and an initial light transmittance level of the dimming glass.

[0038] The dimming glass transmittance level is defined according to the light value, and combined with the selected light intensity sensor and the characteristics of the glass film, a mapping library of dimming glass transmittance level and light value threshold is established. The light value range is 0-65535lux, and the dimming glass transmittance level includes 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%.

[0039] Step 103: Acquire in real time the relevant start signal of the user shifting gears after the vehicle is started, and acquire the vehicle speed and steering angle under the relevant start signal.

[0040] Step 104: judging whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold according to the vehicle speed threshold and / or steering angle threshold when the user engages a gear, the preset gear dimming condition and the threshold mapping library;

[0041] If it exceeds, the adjustment of the skylight in front of the vehicle, the left and right sides in front, or the left and right sides in the rear and the corresponding dimming parameters are determined based on the preset gear dimming conditions and thresholds and the difference between the gear dimming conditions and the initial light transmittance adjustment, and then the dimming instructions are generated based on the dimming parameters to perform a secondary light transmittance gear adjustment on the initial light transmittance adjustment.

[0042] The preset gears are defined as 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% transmittance gears according to the light values ​​of 0 to 65535 lux input in each area. For example, when the light value is 0 to 100 lux, the transmittance gear is 0%, and when the light value is 30000 to 65535 lux, the transmittance gear is 100%. The corresponding result of the light value and the gear is a fitting curve obtained by a large amount of data collection, and a 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 glass diaphragm. Therefore, when the light intensity sensor and the glass diaphragm are selected, the corresponding threshold mapping library is determined.

[0043] The mapping relationship between the vehicle speed threshold and / or steering angle threshold when the user is in gear and the preset gear dimming threshold mapping library is as follows:

[0044] The user shifts the gear to R, the vehicle speed is true and greater than or equal to 0km / h, the steering angle is not considered, and the preset gear transmittance is defined according to the light value: the corresponding dimming glass on the left and right sides of the front of the vehicle is adjusted, and the transmittance is adjusted to 100%.

[0045] The user shifts the gear to D, the vehicle speed is true and greater than or equal to 0km / h, the steering angle is true and greater than or equal to zero, and the preset gear transmittance is defined according to the light value: the steering direction is determined to be right according to the steering angle, and the corresponding dimming glass on the right is adjusted, and the transmittance is adjusted to 100%.

[0046] The user shifts the gear to D, the vehicle speed is true and greater than or equal to 0km / h, the steering angle is true and less than or equal to zero, and the preset gear transmittance is defined according to the light value: the steering direction is determined to be left according to the steering angle, and the corresponding dimming glass on the left is adjusted, and the transmittance is adjusted to 100%.

[0047] If and only if the above conditions are met, the glass film will be adjusted for the second light transmittance, and other conditions will not be considered temporarily. If it is detected that any of the above conditions is not met, the second light transmittance adjustment will be closed after a delay of 3s, and the first adjustment gear based on light intensity will be restored.

[0048] The secondary light transmission gear adjustment has three modes, namely: left transparent mode, right transparent mode and left and right transparent mode. It should be noted that the transparent mode is that the dimming glass controller outputs a control instruction to adjust the light transmittance of the glass on the corresponding side to 100%.

[0049] Transparency mode on the left:

[0050] Condition 1: The vehicle's ready state is on (i.e., the high voltage signal on the vehicle), and the left turn signal is on;

[0051] Condition 2: The vehicle's current actual gear is D gear, the actual speed is greater than 1km / h, and the left turn angle is greater than 10 degrees;

[0052] When either condition 1 or condition 2 is met, the secondary transmittance adjustment is turned on to adjust the transmittance of the glass on the left side to 100%.

[0053] Transparency mode is off on the left:

[0054] When any condition in condition 1 or any condition in condition 2 is not met, the secondary light transmittance adjustment is turned off and the primary adjustment position based on light intensity judgment is restored.

[0055] Right side transparent mode is on:

[0056] Condition 1: The vehicle's ready state is on (i.e., the high voltage signal on the vehicle), and the right turn signal is on;

[0057] Condition 2: The vehicle's current actual gear is D gear, the actual speed is greater than 1km / h, and the right turn angle is greater than 10 degrees;

[0058] When either condition 1 or condition 2 is met, the secondary transmittance adjustment is turned on to adjust the transmittance of the glass on the right side to 100%.

[0059] Right side transparency mode off:

[0060] When any condition in condition 1 or any condition in condition 2 is not met, the secondary light transmittance adjustment is turned off and the primary adjustment position based on light intensity judgment is restored.

[0061] Left and right side transparent mode is turned on:

[0062] Condition 1: The vehicle ready state is turned on (i.e., the high voltage signal on the vehicle);

[0063] Condition 2: The vehicle's current actual gear position is R gear;

[0064] Condition 3: The actual vehicle speed is greater than 1km / h.

[0065] When conditions 1, 2, and 3 are met simultaneously and last for 1 second, the dimming glass controller outputs a control instruction to turn on the left and right transparent modes and adjust the light transmittance of the left and right glass to 100%.

[0066] Left and right side transparent mode is turned off:

[0067] When any of conditions 1, 2, and 3 is not met, the secondary light transmittance adjustment is turned off and the primary adjustment position based on light intensity judgment is restored.

[0068] like Figure 2 As shown in the figure, the dimming glass control system linked to the driving status of the vehicle is mainly composed of a dimming glass controller, a power supply, a light intensity sensor, a chassis domain controller, and glass membranes in various areas of the vehicle.

[0069] The dimming glass controller, as the core of the system, is responsible for receiving and processing signals from different modules and outputting dimming instructions based on these signals. Specifically: according to the received light intensity and vehicle driving status information, the transmittance of the dimming glass is controlled through the MOS switch driver.

[0070] The light intensity sensor is used to obtain the light input values ​​of the vehicle in all 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 the ambient light illumination, receives the ambient light through the 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 the analog-to-digital converter (ADC). The digital signal is sent to the dimming glass controller through the transceiver. The sensor is connected to the third input interface of the dimming glass controller.

[0071] 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 status information, such as speed, steering angle, etc.

[0072] The glass membrane is arranged on the front skylight, 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 glass membrane adopts zone control and is connected to the sixth and seventh input interfaces of the dimming glass controller to receive the dimming command of the dimming glass controller and adjust the glass transmittance.

[0073] The power supply provides 12V DC power to power the dimming glass controller through the power filter to ensure stable operation of the system. Connect the first and second input interfaces of the dimming glass controller.

[0074] The control system also includes a gateway controller connected to the electrical signal of the light intensity sensor to enhance the stability and reliability of signal transmission.

[0075] The working process of this embodiment will be further described below:

[0076] When the ambient light changes, the light intensity sensor detects the change in light intensity and filters out unwanted wavelengths through an optical filter, and then converts the optical signal into an electrical signal through photoelectric conversion.

[0077] The electrical signal is converted into a digital signal by the ADC and sent to the interface 3 of the dimming glass controller through the Transceiver.

[0078] After receiving the signal, the dimming glass controller sends a dimming instruction to the dimming glass through interface 6 according to the preset dimming logic and mapping library.

[0079] If the vehicle is in a turning or reversing state, the chassis domain controller sends vehicle status information to the dimming glass controller through interface 4.

[0080] The dimming glass controller controls the MOS switch driver through interface 7 according to the vehicle status and light intensity information to achieve secondary adjustment of the light transmittance of the dimming glass.

[0081] When turning, the controller may activate the left-side transparent mode or the right-side transparent mode, so that the glass transmittance on the corresponding side is adjusted to 100% to improve the driver's field of view.

[0082] When reversing, the controller will activate the left and right side transparency mode, so that the light transmittance of the glass on both sides is adjusted to 100% to provide a better rear view.

[0083] All these operations are achieved 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 status of the vehicle and the ambient light conditions.

[0084] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A dimming glass control method linked to a vehicle driving state, characterized in that: The following steps are involved: Step 101: A light intensity sensor obtains a plurality of light input values ​​corresponding to the skylight directly in front of the vehicle, the left and right sides in front, and the left and right sides in the rear; Step 102: the dimming glass controller performs initial light transmittance adjustment on the glass film according to a plurality of light input values ​​and an initial light transmittance position of the dimming glass; Step 103: obtaining in real time a relevant start signal of the user shifting gears after the vehicle is started, and obtaining the vehicle speed and steering angle under the relevant start signal; Step 104: judging whether the vehicle speed and steering angle exceed the vehicle speed threshold and / or steering angle threshold according to the vehicle speed threshold and / or steering angle threshold when the user engages a gear, the preset gear dimming condition and the threshold mapping library; If it exceeds, the adjustment of the skylight in front of the vehicle, the left and right sides in front, or the left and right sides in the rear and the corresponding dimming parameters are determined based on the preset gear dimming conditions and thresholds and the difference between the gear dimming conditions and the initial light transmittance adjustment, and then the dimming instructions are generated based on the dimming parameters to perform a secondary light transmittance gear adjustment on the initial light transmittance adjustment.

2. The dimming glass control method linked to the vehicle driving state as claimed in claim 1, characterized in that: The light transmittance level of the dimming glass is defined according to the illumination value, and a mapping library between the light transmittance level of the dimming glass and the illumination value threshold is established in combination with the characteristics of the selected light intensity sensor and the glass membrane.

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

4. The dimming glass control method linked to the vehicle driving state as claimed in claim 1, characterized in that: The secondary light transmission gear adjustment has three modes: left-side transparent mode, right-side transparent mode, and left and right-side transparent mode.

5. A dimming glass control system linked to a vehicle driving state, used to implement a dimming glass control method linked to a vehicle driving state as claimed in any one of claims 1 to 4, characterized in that: include: Dimming glass controller, power supply, light intensity sensor, chassis domain controller and glass membranes in various areas 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 status information; Light intensity sensor, used to obtain light input values ​​from all directions of the vehicle and transmit the light input values ​​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 membrane is arranged on the skylight directly in front of the vehicle body, on the left and right sides in front, or on the left and right sides in the rear, and is electrically connected to the output port of the dimming glass controller; The power supply is used to provide 12V DC power to power the dimming glass controller through a power filter.

6. The dimming glass control system linked to the vehicle driving state as claimed in claim 5, characterized in that: The glass membrane adopts zone control, receives dimming instructions from the dimming glass controller, and adjusts the glass transmittance.

7. The dimming glass control system linked to the vehicle driving state as claimed in claim 5, characterized in that: The chassis domain controller communicates with the dimming glass controller through the CAN node to provide vehicle driving status information.

8. The dimming glass control system linked to the vehicle driving state as claimed in claim 5, characterized in that: The ambient light is received through the optical filter, and 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 sent to the dimming glass controller through the transceiver.

9. The dimming glass control system linked to the vehicle driving state as claimed 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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