A vehicle-mounted multi-zone independent dimming glass control method, device and equipment
Patent Information
- Application Number
- CN202611220904.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-12
- Publication Date
- 2026-10-16
AI Technical Summary
传统的解决方案通常需要在每一块需要独立控制的调光玻璃附近布置专用的光线传感器，这带来了传感器数量增加、布线复杂和系统成本上升等一系列问题
[0024]本申请实施例提供的技术方案带来的有益效果包括：
Smart Images
Figure CN122914786A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive electronics and smart cockpit technology, specifically to a method, device, and equipment for controlling multi-zone independent dimming glass in vehicles. Background Technology
[0002] Automotive smart glass technology has been widely adopted in the automotive industry in recent years. This technology involves embedding electrochromic or liquid crystal materials within the glass interlayer, altering the optical properties of the materials under an applied electric field to achieve continuous or stepped adjustment of the glass's light transmittance. Compared to traditional physical sunshades or privacy glass with fixed light transmittance, smart glass can actively adjust its light transmittance according to external lighting conditions while maintaining visibility inside the vehicle, offering significant advantages in sun protection, heat insulation, privacy protection, and driving comfort.
[0003] Industry trends show that the control method of smart dimming glass is gradually evolving from manual switch control to automatic control based on sensor information. Some high-end models have achieved deep integration with the vehicle's electronic and electrical architecture, and can automatically adjust the glass transmittance according to factors such as external light intensity, solar altitude angle, and driving direction.
[0004] Against this technological backdrop, how to efficiently, economically, and accurately acquire the real-time illumination status of each window position to support independent light transmittance adjustment decisions has become a pressing technical problem in this field. Traditional solutions typically require placing dedicated light sensors near each independently controllable dimming glass panel, leading to a series of problems such as increased sensor quantity, complex wiring, and higher system costs. Finding a solution that accurately calculates the illumination status of each window without adding extra hardware is of great significance for promoting the widespread adoption of dimming glass technology throughout the vehicle. Summary of the Invention
[0005] This application provides a method, device, and equipment for controlling multi-zone independent dimming glass in vehicles, which can independently calculate the equivalent light intensity and steplessly adjust the light transmittance of each area of the rear left window, rear right window, and sunroof without adding any additional sensors.
[0006] In a first aspect, embodiments of this application provide a method for controlling multi-zone independent dimming glass in a vehicle, the method comprising: Acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle; The angle of incidence of the sun relative to the vehicle is determined based on the solar altitude angle, solar azimuth angle, and vehicle attitude information. The angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body. The ambient light attenuation coefficient is determined based on measured ambient light data and theoretical light intensity determined by the solar elevation angle. Based on the incident angle, vehicle attitude information, and ambient light attenuation coefficient, the target light intensity of the sunroof and rear windows is calculated to adjust the light transmittance of the sunroof and rear windows.
[0007] In conjunction with the first aspect, in one implementation, determining the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle, and vehicle attitude information specifically includes: Obtain the vehicle attitude information, including the vehicle heading angle, vehicle pitch angle, and vehicle roll angle. Based on the vehicle's heading angle, pitch angle, roll angle, solar altitude angle, and solar azimuth angle, the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body are calculated.
[0008] In conjunction with the first aspect, in one implementation method, determining the ambient light attenuation coefficient specifically includes: Based on the solar altitude angle: If the solar elevation angle is not lower than the preset threshold, the theoretical light intensity is obtained based on the solar elevation angle and the preset model, and the ambient light attenuation coefficient is calculated based on the theoretical light intensity and the forward irradiance in the measured ambient light data. If the solar altitude angle is lower than the preset threshold, it means there is no effective direct sunlight, and the ambient light attenuation coefficient is set to zero.
[0009] In conjunction with the first aspect, in one implementation, before calculating the target illuminance of the rear windows and sunroof, the method further includes: The determination of direct intrusion is based on the relative azimuth angle, relative elevation angle, and ambient light attenuation coefficient in the incident angle: If the relative azimuth angle is within the first preset angle range, the relative elevation angle is within the second preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear left window is determined to be in direct light mode; otherwise, the rear left window is determined to be in diffused light mode. If the relative azimuth angle is within the third preset angle range, the relative elevation angle is within the fourth preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear right window is determined to be in direct light mode; otherwise, the rear right window is determined to be in diffused light mode. If the relative azimuth angle is within the fifth preset angle range, the relative elevation angle is greater than or equal to the sixth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the front sunroof is determined to be in direct light mode; otherwise, the front sunroof is determined to be in diffused light mode. If the relative azimuth angle is within the seventh preset angle range, the relative elevation angle is greater than or equal to the eighth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear sunroof is determined to be in direct light mode; otherwise, the rear sunroof is determined to be in diffused light mode.
[0010] In conjunction with the first aspect, in one implementation, the calculation of the target illuminance for the left rear window, when the left rear window is in direct illumination mode, is as follows:
[0011] in The target light intensity for the left rear window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the left-side window glass; For calculating the target light intensity of the rear left window, when the rear left window is in scattering mode, the target light intensity is:
[0012] in The target light intensity for the left rear window. The left-side irradiance was collected by the front light sensor. This is a left-side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in direct sunlight mode, the target illuminance is:
[0013] in The target light intensity for the rear right-side window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the right-side window glass; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in scattering mode, the target illuminance is:
[0014] in The target light intensity for the rear right-side window. The right-side irradiance was collected by the front light sensor. This is the right-hand side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illumination intensity of the front sunroof, when the front sunroof is in direct sunlight mode, the target illumination intensity is:
[0015] in The target light intensity for the front sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the front skylight, when the front skylight is in scattering mode, the target illumination intensity is:
[0016] in The target light intensity for the front sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the front side of the sunroof. The relative azimuth angle in the incident angle. The relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear sunroof, when the rear sunroof is in direct sunlight mode, the target illumination intensity is:
[0017] in The target light intensity for the rear sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear skylight, when the rear skylight is in scattering mode, the target illumination intensity is:
[0018] in The target light intensity for the rear sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the rear side of the sunroof. The relative azimuth angle in the incident angle. This is the relative altitude angle of the sun relative to the vehicle body.
[0019] In conjunction with the first aspect, in one implementation, adjusting the light transmittance of the sunroof and rear windows specifically includes: The calculated target light intensity is mapped to the target transmittance, and the target transmittance is smoothed and filtered, while the rate of change of the target transmittance is limited to a preset rate of change. Adjust the light transmittance of the sunroof and rear windows based on the target light transmittance; Specifically, when the target transmittance changes, the transmittance adjustment is performed after a preset delay.
[0020] In conjunction with the first aspect, in one embodiment, the vehicle-mounted multi-zone independent dimming glass control method further includes: Real-time monitoring of vehicle steering intention signals, wherein the vehicle steering intention signals include steering wheel angle signals or navigation path planning information; When a vehicle steering intention signal is detected, the predicted angle of incidence of the sun relative to the vehicle is recalculated based on the vehicle's predicted heading. Based on the predicted incident angle, the direct sunlight state of the sunroof and rear windows after the turn is completed is predicted, and the light transmittance of the corresponding sunroof and rear windows is pre-adjusted to the target state before the vehicle turns.
[0021] In conjunction with the first aspect, in one embodiment, the vehicle-mounted multi-zone independent dimming glass control method further includes: The working status of the sensor that monitors the ambient light at the front of the vehicle; Based on monitoring results, when sensor data failure or channel abnormality is detected, a safety protection mode is triggered, which determines direct sunlight intrusion solely based on the angle of incidence of the sun relative to the vehicle. If the mode is determined to be direct sunlight, the light transmittance of the corresponding sunroof and rear windows will be controlled to be lower than the preset safety threshold. If the mode is determined to be scattering mode, the light transmittance of the corresponding sunroof and rear windows will be maintained at the preset default light transmittance.
[0022] Secondly, embodiments of this application provide a vehicle-mounted multi-zone independent dimming glass control device, the vehicle-mounted multi-zone independent dimming glass control device comprising: The data acquisition module is used to acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle. An angle determination module is used to determine the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle and vehicle attitude information, wherein the angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body. The coefficient determination module is used to determine the ambient light attenuation coefficient based on measured ambient light data and theoretical light intensity determined based on the solar altitude angle. The control module is used to calculate the target light intensity of the sunroof and rear windows based on the incident angle, vehicle attitude information and ambient light attenuation coefficient, so as to adjust the light transmittance of the sunroof and rear windows.
[0023] Thirdly, this application provides a vehicle-mounted multi-zone independent dimming glass control device, which includes a processor, a memory, and a vehicle-mounted multi-zone independent dimming glass control program stored in the memory and executable by the processor. When the vehicle-mounted multi-zone independent dimming glass control program is executed by the processor, it implements the steps of the above-described vehicle-mounted multi-zone independent dimming glass control method.
[0024] The beneficial effects of the technical solutions provided in this application include: By comparing measured ambient light data with theoretical light intensity, the ambient light attenuation coefficient is determined. It can capture real-time changes in actual lighting such as cloud cover and building shadows. It performs well in asymmetrical lighting scenarios, maintaining transparency on cloudy days and effectively shading on hot days. Through a steering prediction mechanism and smoothing strategies such as limiting the rate of change of transmittance and state hysteresis confirmation, it effectively eliminates abrupt changes and frequent fluctuations in transmittance, achieving truly imperceptible adjustment and significantly improving passenger comfort. Attached Figure Description
[0025] Figure 1 This is a flowchart illustrating the vehicle-mounted multi-zone independent dimming glass control method of this application; Figure 2 This is a system framework diagram of the vehicle-mounted multi-zone independent dimming glass control method of this application; Figure 3 This is a schematic diagram of the vehicle body coordinate system for this application; Figure 4 This is a schematic diagram of the functional modules of the vehicle-mounted multi-zone independent dimming glass control device of this application; Figure 5 This is a schematic diagram of the hardware structure of the vehicle-mounted multi-zone independent dimming glass control device of this application. Detailed Implementation
[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.
[0027] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0028] In a first aspect, embodiments of this application provide a method for controlling multi-zone independent dimming glass in vehicles. In one embodiment, reference is made to Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the vehicle-mounted multi-zone independent dimming glass control method of this application. Figure 1 As shown, the control method for multi-zone independent dimming glass in vehicles includes: S1: Acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle; S2: Determine the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle and vehicle attitude information, wherein the angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body; S3: Determine the ambient light attenuation coefficient based on measured ambient light data and theoretical light intensity determined by the solar elevation angle; S4: Based on the incident angle, vehicle attitude information, and ambient light attenuation coefficient, calculate the target light intensity of the sunroof and rear windows to adjust the light transmittance of the sunroof and rear windows.
[0029] First, it should be noted that the system framework diagram of the vehicle-mounted multi-zone independent dimming glass control method in this application is as follows: Figure 2 As shown, the system includes: Positioning and time acquisition modules, such as Global Navigation Satellite System (GNSS) receivers, are used to provide the vehicle's real-time latitude and longitude coordinates and Coordinated Universal Time (UTC) time; The vehicle attitude perception module integrates a three-axis gyroscope, a three-axis accelerometer, and a three-axis magnetometer. It outputs the vehicle's heading angle Ψ, pitch angle α, and roll angle β through sensor fusion algorithms, such as Kalman filtering. The heading angle Ψ is defined as the angle between the vehicle's longitudinal axis and true north. The front light sensor module, installed in the upper area of the windshield, such as at the base of the interior rearview mirror, contains at least four photosensitive element channels with different orientations: a forward channel, a top channel, a left-side channel, and a right-side channel. The optical axis of the forward channel is approximately parallel to the vehicle's longitudinal axis and points forward; the optical axis of the top channel is approximately vertically upward and points towards the sky; the optical axis of the left-side channel points to the left front side of the vehicle at an angle of approximately 45 to 60 degrees to the horizontal of the vehicle's longitudinal axis; the right-side channel points symmetrically to the right front side. After adjustment, the output of each channel provides a numerical value reflecting the irradiance in the corresponding direction, denoted as forward irradiance. Top irradiance Left-side irradiance Right-side irradiance ; The vehicle body geometry parameter storage unit stores geometric parameters obtained through vehicle 3D model or actual vehicle calibration, including at least the direct incidence angle window [φ] of the rear left side window. Lmin φ Lmax ] and [θ Lmin θ Lmax ]; Direct incidence angle window of the rear right side window [φ Rmin , φ Rmax ] and [θ Rmin θ Rmax ]; Sunroof window in the front row area for direct sunlight incidence angle [φ roofFmin φ roofFmax ] and [θ roofFmin [90°]; Sunroof window in the rear passenger area for direct sunlight incidence [φ] roofRmin , φ roofRmax ] and [θ roofRmin [90°]; These windows define the solar azimuth angle φ relative to the vehicle body that allows sunlight to pass directly through the corresponding glass area and illuminate the occupant's head or eyes. rel and elevation angle θ rel scope; The main controller executes the core algorithms of this invention, including solar position calculation, coordinate transformation, ambient light attenuation coefficient calculation, direct sunlight intrusion determination, illumination state calculation, target transmittance generation and smoothing, sensor fault diagnosis and degradation control, etc. The main controller can be an independent electronic control unit (ECU) or integrated into the vehicle domain controller or central computing platform. The dimming glass drive module includes a rear left dimming glass drive module, a rear right dimming glass drive module, and a sunroof dimming glass drive module. If the sunroof supports physical partitioning, the sunroof drive module can contain independent drive channels for the front sunroof area and the rear sunroof area, respectively. The drive module receives the target light transmittance command from the main controller and adjusts the amplitude, polarity, or duty cycle of the drive voltage to make the corresponding glass achieve the specified light transmittance.
[0030] Human-machine interfaces, such as soft switches on the central control display, touch sliders or physical buttons on the rear doors, allow occupants to manually control the light transmittance of a particular glass and set automatic or manual modes.
[0031] In addition, steering wheel angle sensor or navigation path information can be optionally connected for steering prediction function.
[0032] Furthermore, in one embodiment, determining the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle, and vehicle attitude information specifically includes: Obtain the vehicle attitude information, including the vehicle heading angle, vehicle pitch angle, and vehicle roll angle. Specifically, the vehicle heading angle, pitch angle, and roll angle are read from the vehicle attitude information module; Based on the vehicle's heading angle, pitch angle, roll angle, solar altitude angle, and solar azimuth angle, the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body are calculated. Specifically, based on the Euler angle rotation matrix, the absolute direction vector of the sun is transformed into the vehicle body coordinate system to obtain the relative azimuth and relative altitude angles of the sun relative to the vehicle body.
[0033] It should be noted that, for clarity of description, Figure 3 A vehicle body coordinate system is defined, with the origin O located at the installation position of the windshield light sensor or the center of mass. The positive X-axis points directly forward of the vehicle, the positive Y-axis points to the left side of the vehicle, and the positive Z-axis points vertically upward. The direction of the sun relative to the vehicle body is represented by the relative azimuth angle φ. rel and relative elevation angle θ rel It means that φ rel θ is the angle (top view) of the projection of sunlight onto the XOY plane, rotated clockwise from the positive X-axis, ranging from 0 to 360 degrees or from -180 to 180 degrees; rel The angle between the sun's rays and the XOY plane (horizontal plane) ranges from 0 to 90 degrees.
[0034] Furthermore, in one embodiment, determining the ambient light attenuation coefficient specifically includes: Based on the solar altitude angle: If the solar elevation angle is not lower than the preset threshold, the theoretical light intensity is obtained based on the solar elevation angle and the preset model, and the ambient light attenuation coefficient is calculated based on the theoretical light intensity and the forward irradiance in the measured ambient light data. Specifically, if the solar elevation angle is not lower than the preset threshold, the theoretical light intensity that the forward channel should receive under standard clear sky conditions is obtained by looking up the table based on the solar elevation angle and the preset atmospheric turbidity model using the forward sensor as a reference. The ambient light attenuation coefficient is then calculated based on the theoretical light intensity and the forward irradiance in the measured ambient light data. If the solar altitude angle is lower than the preset threshold, it means there is no effective direct sunlight, and the ambient light attenuation coefficient is set to zero.
[0035] Specifically, if the solar altitude angle is lower than the preset threshold, such as when the reading of the top sensor is extremely low at night, it indicates that there is no effective direct sunlight. In this case, the ambient light attenuation coefficient is set to zero. The range of the ambient light attenuation coefficient is 0 to 1. When the ambient light attenuation coefficient is equal to 1, it indicates that the sky is completely clear. The smaller the ambient light attenuation coefficient, the thicker the cloud layer.
[0036] Furthermore, in one embodiment, before calculating the target illuminance of the rear windows and sunroof, the method further includes: The determination of direct intrusion is based on the relative azimuth angle, relative elevation angle, and ambient light attenuation coefficient in the incident angle: If the relative azimuth angle is within the first preset angle range, the relative elevation angle is within the second preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear left window is determined to be in direct light mode; otherwise, the rear left window is determined to be in diffused light mode. Specifically, if the relative azimuth angle is within [φ] Lmin , φ Lmax The relative elevation angle is within [θ] Lmin θ Lmax If the ambient light attenuation coefficient is greater than the preset coefficient threshold, the rear left window is determined to be in direct light mode; otherwise, the rear left window is determined to be in diffuse light mode. If the relative azimuth angle is within the third preset angle range, the relative elevation angle is within the fourth preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear right window is determined to be in direct light mode; otherwise, the rear right window is determined to be in diffused light mode. Specifically, if the relative azimuth angle is within [φ] Rmin , φ Rmax The relative elevation angle is within [θ] Rmin θ Rmax If the ambient light attenuation coefficient is greater than the preset coefficient threshold, the rear right window is determined to be in direct light mode; otherwise, the rear right window is determined to be in diffused light mode. If the relative azimuth angle is within the fifth preset angle range, the relative elevation angle is greater than or equal to the sixth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the front sunroof is determined to be in direct light mode; otherwise, the front sunroof is determined to be in diffused light mode. Specifically, if the relative azimuth angle is within [φ] roofFmin , φ roofFmax The relative elevation angle is within [θ] roofFmin If the ambient light attenuation coefficient is greater than the preset coefficient threshold, the front sunroof is determined to be in direct light mode; otherwise, the front sunroof is determined to be in diffused light mode. If the relative azimuth angle is within the seventh preset angle range, the relative elevation angle is greater than or equal to the eighth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear sunroof is determined to be in direct light mode; otherwise, the rear sunroof is determined to be in diffused light mode.
[0037] Specifically, if the relative azimuth angle is within [φ] roofRmin , φ roofRmax The relative elevation angle is within [θ] roofRmin If the ambient light attenuation coefficient is greater than the preset coefficient threshold, the rear sunroof is determined to be in direct light mode; otherwise, it is determined to be in diffused light mode.
[0038] Furthermore, in one embodiment, the calculation of the target illuminance for the left rear window is as follows: When the left rear window is in direct illumination mode, the target illuminance is:
[0039] in The target light intensity for the left rear window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the left-side window glass; For calculating the target light intensity of the rear left window, when the rear left window is in scattering mode, the target light intensity is:
[0040] in The target light intensity for the left rear window. The left-side irradiance was collected by the front light sensor. This is a left-side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in direct sunlight mode, the target illuminance is:
[0041] in The target light intensity for the rear right-side window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the right-side window glass; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in scattering mode, the target illuminance is:
[0042] in The target light intensity for the rear right-side window. The right-side irradiance was collected by the front light sensor. This is a right-side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illumination intensity of the front sunroof, when the front sunroof is in direct sunlight mode, the target illumination intensity is:
[0043] in The target light intensity for the front sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the front skylight, when the front skylight is in scattering mode, the target illumination intensity is:
[0044] in The target light intensity for the front sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the front side of the sunroof. The relative azimuth angle in the incident angle. The relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear sunroof, when the rear sunroof is in direct sunlight mode, the target illumination intensity is:
[0045] in The target light intensity for the rear sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear skylight, when the rear skylight is in scattering mode, the target illumination intensity is:
[0046] in The target light intensity for the rear sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the rear side of the sunroof. The relative azimuth angle in the incident angle. This is the relative altitude angle of the sun relative to the vehicle body.
[0047] Furthermore, in one embodiment, adjusting the light transmittance of the sunroof and rear windows specifically includes: The calculated target light intensity is mapped to the target transmittance, and the target transmittance is smoothed and filtered, while the rate of change of the target transmittance is limited to a preset rate of change. Specifically, the calculated target light intensity is mapped to the target transmittance, and the target transmittance is smoothed and filtered. The rate of change of the target transmittance is limited to a preset rate of change, for example, the target transmittance change is set to no more than 5% per second. Adjust the light transmittance of the sunroof and rear windows based on the target light transmittance; Specifically, when the target transmittance changes, the transmittance adjustment is performed after a preset delay.
[0048] Specifically, when the target transmittance changes, the current transmittance should be maintained for a certain period of time, for example, for 5 seconds, before updating the target transmittance to avoid instantaneous changes, such as the adjustment caused by the rapid passing of tree shadows.
[0049] Furthermore, in one embodiment, the vehicle-mounted multi-zone independent dimming glass control method further includes: Real-time monitoring of vehicle steering intention signals, wherein the vehicle steering intention signals include steering wheel angle signals or navigation path planning information; Specifically, the vehicle steering intention signal is monitored in real time, wherein the vehicle steering intention signal includes a steering wheel turning rate exceeding a threshold or a navigation prompt to turn and the distance is less than a preset value; When a vehicle steering intention signal is detected, the predicted angle of incidence of the sun relative to the vehicle is recalculated based on the vehicle's predicted heading. Specifically, when a vehicle steering intention signal is detected, the main controller recalculates the predicted angle of incidence of the sun relative to the vehicle after the steering based on the predicted heading after the steering. Based on the predicted incident angle, the direct sunlight state of the sunroof and rear windows after the turn is completed is predicted, and the light transmittance of the corresponding sunroof and rear windows is pre-adjusted to the target state before the vehicle turns.
[0050] Furthermore, in one embodiment, the vehicle-mounted multi-zone independent dimming glass control method further includes: The working status of the sensor that monitors the ambient light at the front of the vehicle; Based on monitoring results, when sensor data failure or channel abnormality is detected, a safety protection mode is triggered, which determines direct sunlight intrusion solely based on the angle of incidence of the sun relative to the vehicle. If the mode is determined to be direct sunlight, the light transmittance of the corresponding sunroof and rear windows will be controlled to be lower than the preset safety threshold. If the mode is determined to be scattering mode, the light transmittance of the corresponding sunroof and rear windows will be maintained at the preset default light transmittance.
[0051] Specifically, if the mode is determined to be scattering mode, the light transmittance of the corresponding sunroof and rear window will be maintained at the preset default light transmittance, which is set to a medium default value.
[0052] Secondly, embodiments of this application also provide a vehicle-mounted multi-zone independent dimming glass control device.
[0053] In one embodiment, reference is made to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of the vehicle-mounted multi-zone independent dimming glass control device of this application. Figure 4 As shown, the vehicle-mounted multi-zone independent dimming glass control device includes: The data acquisition module is used to acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle. An angle determination module is used to determine the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle and vehicle attitude information, wherein the angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body. The coefficient determination module is used to determine the ambient light attenuation coefficient based on measured ambient light data and theoretical light intensity determined based on the solar altitude angle. The control module is used to calculate the target light intensity of the sunroof and rear windows based on the incident angle, vehicle attitude information and ambient light attenuation coefficient, so as to adjust the light transmittance of the sunroof and rear windows.
[0054] The functions of each module in the above-mentioned vehicle-mounted multi-zone independent dimming glass control device correspond to the steps in the above-mentioned vehicle-mounted multi-zone independent dimming glass control method embodiment, and their functions and implementation processes will not be described in detail here.
[0055] Thirdly, embodiments of this application provide a vehicle-mounted multi-zone independent dimming glass control device, which can be a personal computer (PC), laptop computer, server, or other device with data processing capabilities.
[0056] Reference Figure 5 , Figure 5 This is a schematic diagram of the hardware structure of the vehicle-mounted multi-zone independent dimming glass control device involved in the embodiments of this application. In this embodiment, the vehicle-mounted multi-zone independent dimming glass control device may include a processor, a memory, a communication interface, and a communication bus.
[0057] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.
[0058] The communication interface includes input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting components within the vehicle-mounted multi-zone independent dimming glass control device, as well as interfaces used for interconnecting the vehicle-mounted multi-zone independent dimming glass control device with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.
[0059] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.
[0060] The processor can be a general-purpose processor, which can call the vehicle-mounted multi-zone independent dimming glass control program stored in the memory and execute the vehicle-mounted multi-zone independent dimming glass control method provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the vehicle-mounted multi-zone independent dimming glass control program is called can be referred to the various embodiments of the vehicle-mounted multi-zone independent dimming glass control method of this application, and will not be repeated here.
[0061] Those skilled in the art will understand that Figure 5 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0062] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0063] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.
[0064] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.
[0065] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.
[0066] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.
[0067] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.
[0068] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A method for controlling multi-zone independent dimming glass in a vehicle, characterized in that, The method for controlling multi-zone independent dimming glass in vehicles includes: Acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle; The angle of incidence of the sun relative to the vehicle is determined based on the solar altitude angle, solar azimuth angle, and vehicle attitude information. The angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body. The ambient light attenuation coefficient is determined based on measured ambient light data and theoretical light intensity determined by the solar elevation angle. Based on the incident angle, vehicle attitude information, and ambient light attenuation coefficient, the target light intensity of the sunroof and rear windows is calculated to adjust the light transmittance of the sunroof and rear windows.
2. The vehicle-mounted multi-zone independent dimming glass control method as described in claim 1, characterized in that, The determination of the solar incidence angle relative to the vehicle based on the solar altitude angle, solar azimuth angle, and vehicle attitude information specifically includes: Obtain the vehicle attitude information, including the vehicle heading angle, vehicle pitch angle, and vehicle roll angle. Based on the vehicle's heading angle, pitch angle, roll angle, solar altitude angle, and solar azimuth angle, the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body are calculated.
3. The vehicle-mounted multi-zone independent dimming glass control method as described in claim 1, characterized in that, The determination of the ambient light attenuation coefficient specifically includes: Based on the solar altitude angle: If the solar elevation angle is not lower than the preset threshold, the theoretical light intensity is obtained based on the solar elevation angle and the preset model, and the ambient light attenuation coefficient is calculated based on the theoretical light intensity and the forward irradiance in the measured ambient light data. If the solar altitude angle is lower than the preset threshold, it means there is no effective direct sunlight, and the ambient light attenuation coefficient is set to zero.
4. The method for controlling multi-zone independent dimming glass in a vehicle as described in claim 1, characterized in that, Before calculating the target light intensity for the rear windows and sunroof, the following is also included: The determination of direct intrusion is based on the relative azimuth angle, relative elevation angle, and ambient light attenuation coefficient in the incident angle: If the relative azimuth angle is within the first preset angle range, the relative elevation angle is within the second preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear left window is determined to be in direct light mode; otherwise, the rear left window is determined to be in diffused light mode. If the relative azimuth angle is within the third preset angle range, the relative elevation angle is within the fourth preset angle range, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear right window is determined to be in direct light mode; otherwise, the rear right window is determined to be in diffused light mode. If the relative azimuth angle is within the fifth preset angle range, the relative elevation angle is greater than or equal to the sixth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the front sunroof is determined to be in direct light mode; otherwise, the front sunroof is determined to be in diffused light mode. If the relative azimuth angle is within the seventh preset angle range, the relative elevation angle is greater than or equal to the eighth preset angle, and the ambient light attenuation coefficient is greater than the preset coefficient threshold, then the rear sunroof is determined to be in direct light mode; otherwise, the rear sunroof is determined to be in diffused light mode.
5. The method for controlling multi-zone independent dimming glass in a vehicle as described in claim 4, characterized in that: For calculating the target light intensity of the rear left-side window, when the rear left-side window is in direct light mode, the target light intensity is: in The target light intensity for the left rear window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the left-side window glass; For calculating the target light intensity of the rear left window, when the rear left window is in scattering mode, the target light intensity is: in The target light intensity for the left rear window. The left-side irradiance was collected by the front light sensor. This is a left-side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in direct sunlight mode, the target illuminance is: in The target light intensity for the rear right-side window. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... The cosine of the angle between the sunlight and the normal of the right-side window glass; For calculating the target illuminance of the rear right-side window, when the rear right-side window is in scattering mode, the target illuminance is: in The target light intensity for the rear right-side window. The right-side irradiance was collected by the front light sensor. This is the right-hand side correction factor. The relative azimuth angle in the incident angle. The solar altitude angle, This is a normalized adjustment function based on top irradiance. Top irradiance collected by the front light sensor; For calculating the target illumination intensity of the front sunroof, when the front sunroof is in direct sunlight mode, the target illumination intensity is: in The target light intensity for the front sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the front skylight, when the front skylight is in scattering mode, the target illumination intensity is: in The target light intensity for the front sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the front side of the sunroof. The relative azimuth angle in the incident angle. The relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear sunroof, when the rear sunroof is in direct sunlight mode, the target illumination intensity is: in The target light intensity for the rear sunroof. This refers to the direct solar irradiance after standard atmospheric attenuation. The ambient light attenuation coefficient is... This is the sine of the relative altitude angle of the sun relative to the vehicle body; For calculating the target illumination intensity through the rear skylight, when the rear skylight is in scattering mode, the target illumination intensity is: in The target light intensity for the rear sunroof. The top irradiance is collected by the front light sensor. This is the viewing angle correction factor for the rear side of the sunroof. The relative azimuth angle in the incident angle. This is the relative altitude angle of the sun relative to the vehicle body.
6. The method for controlling multi-zone independent dimming glass in a vehicle as described in claim 1, characterized in that, The adjustment of the light transmittance of the sunroof and rear windows specifically includes: The calculated target light intensity is mapped to the target transmittance, and the target transmittance is smoothed and filtered, while the rate of change of the target transmittance is limited to a preset rate of change. Adjust the light transmittance of the sunroof and rear windows based on the target light transmittance; Specifically, when the target transmittance changes, the transmittance adjustment is performed after a preset delay.
7. The method for controlling multi-zone independent dimming glass in a vehicle as described in claim 1, characterized in that, The method for controlling multi-zone independent dimming glass in vehicles also includes: Real-time monitoring of vehicle steering intention signals, wherein the vehicle steering intention signals include steering wheel angle signals or navigation path planning information; When a vehicle steering intention signal is detected, the predicted angle of incidence of the sun relative to the vehicle is recalculated based on the vehicle's predicted heading. Based on the predicted incident angle, the direct sunlight state of the sunroof and rear windows after the turn is completed is predicted, and the light transmittance of the corresponding sunroof and rear windows is pre-adjusted to the target state before the vehicle turns.
8. The method for controlling multi-zone independent dimming glass in a vehicle as described in claim 1, characterized in that, The method for controlling multi-zone independent dimming glass in vehicles also includes: The working status of the sensor that monitors the ambient light at the front of the vehicle; Based on monitoring results, when sensor data failure or channel abnormality is detected, a safety protection mode is triggered, which determines direct sunlight intrusion solely based on the angle of incidence of the sun relative to the vehicle. If the mode is determined to be direct sunlight, the light transmittance of the corresponding sunroof and rear windows will be controlled to be lower than the preset safety threshold. If the mode is determined to be scattering mode, the light transmittance of the corresponding sunroof and rear windows will be maintained at the preset default light transmittance.
9. A vehicle-mounted multi-zone independent dimming glass control device, characterized in that, The vehicle-mounted multi-zone independent dimming glass control device includes: The data acquisition module is used to acquire solar altitude angle, solar azimuth angle, vehicle attitude information, and measured ambient light data in front of the vehicle. An angle determination module is used to determine the angle of incidence of the sun relative to the vehicle based on the solar altitude angle, solar azimuth angle and vehicle attitude information, wherein the angle of incidence includes the relative azimuth angle and relative altitude angle of the sun relative to the vehicle body. The coefficient determination module is used to determine the ambient light attenuation coefficient based on measured ambient light data and theoretical light intensity determined based on the solar altitude angle. The control module is used to calculate the target light intensity of the sunroof and rear windows based on the incident angle, vehicle attitude information and ambient light attenuation coefficient, so as to adjust the light transmittance of the sunroof and rear windows.
10. A vehicle-mounted multi-zone independent dimming glass control device, characterized in that, The vehicle-mounted multi-zone independent dimming glass control device includes a processor, a memory, and a vehicle-mounted multi-zone independent dimming glass control program stored in the memory and executable by the processor, wherein when the vehicle-mounted multi-zone independent dimming glass control program is executed by the processor, it implements the steps of the vehicle-mounted multi-zone independent dimming glass control method as described in any one of claims 1 to 8.