A method and system for adjusting light in a vehicle based on fiber grating sensing

Abstract

The application relates to the field of automobile technology, in particular to a vehicle interior light adjusting method and system based on fiber grating sensing, which comprises the following steps: arranging a fiber grating sensor array in multiple target areas in a vehicle; obtaining light-heat data of each area by calculating the offset of the reflected light wavelength of the fiber grating sensor; in the running of the vehicle, the fiber grating sensor array collects the light-heat data of each target area in real time and sends the data to a vehicle body controller through a vehicle-mounted network; the vehicle body controller fuses the light-heat data with vehicle state data and external environment data, and judges based on preset comfort rules; when it is judged that there is a situation that needs to be adjusted, a cooperative control instruction is generated; the cooperative control instruction is sent to the execution mechanism corresponding to the sunroof sunshade curtain, the vehicle-mounted screen and the vehicle interior light, and the execution mechanism is driven to carry out linkage adjustment, so that integrated adaptive control of the vehicle interior light environment is realized. The problems of adjustment lag and visual discomfort when the ambient light changes are effectively solved.

Description

Technical Field

[0001] This application relates to the field of automotive technology, specifically to a method and system for adjusting in-vehicle light based on fiber Bragg grating sensing. Background Technology

[0002] As the automotive industry transforms towards intelligent and human-centered design, drivers and passengers increasingly demand higher levels of comfort, safety, and personalization in-vehicle environments. In-vehicle lighting, as a core factor influencing the driving experience, has made dynamic adjustment technology a key focus of industry research and development. Currently, most vehicle lighting adjustment solutions rely on photosensitive sensors, infrared sensors, or single-function environmental sensors. However, these solutions have numerous technical limitations and struggle to meet the demands for refined and intelligent adjustment.

[0003] Traditional photosensitive sensors, while offering advantages in cost and size, are limited in function, only able to roughly sense ambient light intensity. They are also susceptible to factors such as lens attenuation and non-visible light interference, resulting in insufficient measurement accuracy. Furthermore, they require separate deployment in multiple areas within the vehicle, leading to complex wiring harnesses and reduced system reliability. Infrared sensors, while possessing strong penetration and independent of ambient light, are expensive, rely on high-precision thermal resolution for performance, and cannot simultaneously achieve comprehensive sensing of temperature and light intensity, thus limiting their application scenarios. In addition, existing light adjustment systems mostly target the overall in-vehicle environment, lacking precise monitoring of light and heat radiation in specific areas of the occupants' bodies, making it difficult to address individual occupant discomfort such as glare and heat. Moreover, the various adjustment components are mostly independently controlled, lacking a coordinated linkage mechanism. In scenarios with rapid changes in ambient light or direct strong light, problems such as adjustment lag and significant visual discrepancies can easily occur, affecting driving safety and comfort.

[0004] Fiber Bragg grating (FBG) sensors, as a novel sensing element, possess characteristics such as resistance to electromagnetic interference, corrosion resistance, small size, and quasi-distributed measurement capabilities. They can synchronously respond to changes in temperature and strain, achieving precise sensing of ambient light intensity and temperature through the wavelength shift of reflected light. Furthermore, multiple sensors can be connected in series on a single fiber, simplifying wiring layout. However, current applications of FBG sensors in the automotive field are mainly concentrated in overload detection and power battery temperature measurement, and there is still a lack of technical solutions for their integrated adjustment of the in-vehicle lighting environment. Their advantages in multi-regional photothermal comprehensive sensing and multi-actuator collaborative control have not been fully utilized. Summary of the Invention

[0005] To address the problems of traditional sensors being susceptible to interference, having low adjustment accuracy, complex wiring harnesses, and lack of coordination among components, this invention provides a method and system for adjusting in-vehicle light based on fiber optic grating sensing. This enables refined, proactive, and integrated adaptive adjustment of the in-vehicle light environment, improving driving comfort and safety.

[0006] In a first aspect, the present invention provides a method for adjusting in-vehicle light based on fiber Bragg grating sensing, comprising the following steps: S1. Fiber Bragg grating sensor arrays are deployed in multiple target areas inside the vehicle. By calculating the offset of the wavelength of the light reflected by the fiber Bragg grating sensor, photothermal data characterizing the photothermal state of each area is obtained. The photothermal data includes temperature values ​​and solar irradiance values. S2. During vehicle operation, the fiber optic grating sensor array collects photothermal data of each target area in real time and sends it to the vehicle body controller via the vehicle network. S3. The body controller integrates the photothermal data with the vehicle status data and external environment data, and makes a judgment based on preset comfort rules; when it is determined that there is a situation that needs adjustment, it generates a cooperative control command. S4. Send the coordinated control command to the actuators corresponding to the sunroof sunshade, vehicle screen and interior lights, and drive them to perform linkage adjustment to realize integrated adaptive control of the interior light environment.

[0007] The system utilizes fiber optic grating sensors as the core environmental sensing element, which can simultaneously measure temperature and strain, enabling comprehensive sensing of solar irradiance and regional temperature. Furthermore, the system's refined monitoring of human body area illumination and thermal radiation, geared towards passenger comfort, allows the system's adjustment targets to be precisely adjusted from the in-vehicle environment to the occupants themselves.

[0008] As a further definition of the technical solution of this invention, the multiple target areas include: the roof lining and the area around the windows for monitoring solar irradiance from the windows; the surface area of ​​the center console and dashboard for monitoring sunlight irradiating the in-vehicle screen and driver's area; and the shoulder and knee areas of the occupants for monitoring sunlight irradiating their bodies. A clear multi-target area deployment scheme for the fiber optic grating sensor array is defined, specifically covering scenarios such as window irradiance monitoring, in-vehicle screen and driver's area irradiance monitoring, and localized occupant body irradiance monitoring. This achieves refined monitoring from the overall in-vehicle environment to individual occupants, making adjustments more targeted and further improving occupant comfort.

[0009] As a further limitation of the technical solution of the present invention, the calculation of the wavelength offset of the reflected light from the fiber optic grating sensor specifically includes: based on the calibration function relationship between the offset and temperature and light intensity, the wavelength offset is calculated into the temperature value and solar irradiance value of the corresponding region.

[0010] The calculation logic for wavelength offset is refined, and the offset is accurately converted into temperature and solar irradiance values ​​through calibration function relationships. This clarifies the quantitative processing method of sensor data, ensures the accuracy and operability of photothermal data, and provides reliable data support for subsequent accurate decision-making.

[0011] As a further limitation of the technical solution of the present invention, in S3, the vehicle status data includes vehicle speed and vehicle time information; the external environment data includes rain sensor data; The judgment is based on preset comfort rules, including heat load management rules: When the photothermal data shows that the temperature value of the roof or the area around the windows exceeds the first threshold or the positive rate of temperature change is greater than the first rate of change threshold, and the rain sensor data indicates that there is no rainfall, it is determined that there is a risk of thermal discomfort for the occupants, and an instruction to adjust the opening of the sunroof sunshade needs to be generated.

[0012] The specific types of vehicle status data and external environmental data are clearly defined, enriching the data sources for fusion decision-making and making the judgment logic more comprehensive. A heat load management rule is proposed, which monitors the temperature threshold and rate of change of the area around the roof / windows and combines it with rainfall data to judge the risk of heat discomfort for occupants. This enables proactive and predictive adjustment of the sunshade, intervening in advance before occupants feel hot, thus improving comfort. At the same time, it avoids unnecessary closing of the sunshade when there is no rain, taking into account both practicality and flexibility.

[0013] As a further limitation of the technical solution of the present invention, the judgment is based on preset comfort rules, including anti-glare linkage rules: When the solar thermal data shows that the solar irradiance value on the surface of the center console or dashboard exceeds the second threshold, it is determined that there is a risk of screen glare; at this time, the generated collaborative control command includes a command to increase the brightness and contrast of the vehicle screen backlight, and a command to close or dim the corresponding side window sunshade.

[0014] A linkage rule for anti-glare is proposed. To address the screen glare problem caused by direct sunlight on the center console / instrument panel, it simultaneously generates screen brightness and contrast adjustment commands and sunshade control commands, achieving a dual anti-glare effect of display adjustment + physical sunshade. This ensures the readability of the in-vehicle screen while reducing the interference of strong light on the driver's vision, thus improving driving safety. The linkage control mechanism avoids the limitations of single adjustment methods, and its adjustment efficiency and anti-glare effect are significantly better than traditional independent control schemes.

[0015] As a further limitation of the technical solution of the present invention, the judgment is based on preset comfort rules, including dynamic light compensation rules: When the vehicle time information indicates that it is nighttime and the overall photothermal data is below the third threshold, it is determined that it is in a low-light environment; the generated collaborative control instructions at this time include instructions to reduce the brightness of the vehicle screen and adjust it to a warm color temperature, and instructions to dim the interior lights to a warm color tone.

[0016] A dynamic light compensation rule is proposed. In low-light environments at night, the rule reduces the brightness of the in-vehicle screen, adjusts the warm color temperature, and dims the interior lights to a warm tone. This reduces the visual stimulation of light on the driver, avoids glare during nighttime driving, and improves driving safety. The warm-toned lights create a warm and relaxing cabin atmosphere, further optimizing the nighttime driving experience while balancing safety and comfort.

[0017] As a further limitation of the technical solution of the present invention, the judgment is based on preset comfort rules, including transient light compensation rules: When the photothermal data shows that the solar irradiance values ​​of multiple target areas of the vehicle decrease by more than a preset proportion within a preset first time period and drop below the fourth threshold, and the vehicle speed is greater than zero, a compensation control command is generated to improve the brightness of the in-vehicle environment.

[0018] A transient light compensation rule is proposed to accurately identify scenarios where ambient light changes drastically, such as when vehicles enter or exit tunnels. By quickly generating brightness compensation commands, it effectively alleviates the visual disparity and discomfort caused by sudden loss or enhancement of ambient light. Combined with vehicle speed conditions, it ensures that the compensation command is only triggered when the vehicle is in motion, avoiding ineffective adjustments when stationary.

[0019] As a further limitation of the technical solution of the present invention, before making a judgment based on the comfort rule, it also includes: Receive and confirm user settings from the central control interaction module, the user settings including the on / off status and sensitivity parameters of the automatic adjustment function; execute the judgment and instruction generation steps of S3 only when the automatic adjustment function is enabled.

[0020] The addition of a user interaction settings section allows users to control the on / off switch and sensitivity parameters of the automatic adjustment function through the central control interaction module. This balances the intelligence of automatic adjustment with the personalized needs of users, improves the user-friendliness of the solution, and meets the usage habits of different drivers and passengers.

[0021] As a further limitation of the technical solution of the present invention, in S4, the linkage adjustment includes a combination of at least two of the following operations: continuous or segmented adjustment of the opening degree of the sunroof sunshade, adjustment of the brightness and color temperature of the vehicle screen, and adjustment of the brightness and color temperature of the interior ambient light and reading light.

[0022] The proactive sunshade control strategy, based on heat load sensing, actively determines and sets the sunshade opening by monitoring rapid changes or sustained high temperatures in the roof area. Intelligent linkage control between screen display and physical sunshade under strong sunlight: when strong sunlight directly hits the central control screen, the system not only automatically increases the screen backlight brightness and switches to high-contrast mode, but also links this signal with the sunshade control to suggest or automatically close part of the front sun visor. A dynamic ambient light compensation mechanism to cope with sudden changes in ambient light: in scenarios such as entering or exiting tunnels where ambient light changes abruptly, the system can proactively and gently adjust the brightness of the interior ambient lighting. To compensate for visual discrepancies; the context-adaptive vehicle lighting environment coordination and stylistic adjustment can coordinate the brightness and color temperature of multiple light units such as the central control screen, instrument panel, ambient light, and reading lights according to the ambient light intensity (strong light / weak light) and vehicle time; the body controller does not only act based on FBG data, but comprehensively processes all sensor data, vehicle status, and external sensor data, etc., to build a complete closed-loop control system with the FBG sensor array as a unified and refined perception layer, the body controller as the centralized processing and decision-making brain, and the control end covering various actuators such as sunshade, display and lighting.

[0023] Secondly, the present invention provides an in-vehicle light adjustment system based on fiber Bragg grating sensing, comprising: A fiber optic grating sensor array module is distributed in multiple target areas inside the vehicle. It is used to obtain photothermal data that characterizes the photothermal state of each area by calculating the offset of the wavelength of the light reflected by the fiber optic grating sensor. The photothermal data includes temperature value and solar irradiance value. The data acquisition and transmission module is used to acquire photothermal data of each target area output by the fiber optic grating sensor array module in real time during vehicle operation, and transmit it through the vehicle network. The body controller, which is communicatively connected to the data acquisition and transmission module, the vehicle bus, and other auxiliary sensors, is used for: Receive the photothermal data, vehicle status data, and external environment data; The photothermal data is then fused with vehicle status data and external environment data. Judgments are made based on preset comfort rules; When it is determined that there is a situation requiring adjustment, a coordinated control command is generated; Multiple actuators are connected to the vehicle body controller via an in-vehicle network. The multiple actuators include at least a sunroof sunshade drive mechanism, an in-vehicle screen backlight controller, and an interior lighting controller, which are used to receive the coordinated control commands and perform linkage adjustments to achieve integrated adaptive control of the in-vehicle lighting environment.

[0024] As a further limitation of the technical solution of the present invention, the target area for the fiber optic grating sensing array module includes: the roof lining and the area around the windows for monitoring solar irradiance from the windows; the surface area of ​​the center console and dashboard for monitoring sunlight irradiating the in-vehicle screen and the driver's area; and the shoulder and knee areas of the occupants for monitoring sunlight irradiating their bodies.

[0025] As a further limitation of the technical solution of the present invention, the fiber optic grating sensing array module includes a calculation unit, which is configured to: calculate the wavelength shift as the temperature value and solar irradiance value of the corresponding region based on the calibration function relationship between the wavelength shift of the reflected light from the fiber optic grating sensor and the temperature and light intensity.

[0026] As a further limitation of the technical solution of the present invention, the vehicle status data obtained by the vehicle body controller communication includes vehicle speed and vehicle time information; the external environment data obtained by communication includes rain sensor data; The preset comfort rules within the body controller include thermal load management rules, configured as follows: When the photothermal data shows that the temperature value of the roof or the area around the windows exceeds a first threshold or the positive rate of temperature change is greater than a first rate of change threshold, and the rain sensor data indicates that there is no rainfall, it is determined that there is a risk of thermal discomfort for the occupants, and a control command to adjust the opening of the sunroof sunshade is generated.

[0027] As a further limitation of the technical solution of the present invention, the preset comfort rules in the vehicle body controller also include anti-glare linkage rules, configured as follows: When the solar irradiance value on the surface of the center console or dashboard exceeds the second threshold, and it is determined that there is a risk of screen glare, the generated control commands include: a command sent to the vehicle screen backlight controller to increase the brightness and contrast of the screen backlight, and a command sent to the sunroof sunshade drive mechanism to close or darken the corresponding side window sunshade.

[0028] As a further limitation of the technical solution of the present invention, the preset comfort rules in the body controller also include dynamic light compensation rules, configured as follows: When the vehicle time information indicates that it is nighttime and the overall photothermal data is below the third threshold, it is determined that it is in a low-light environment; the control commands generated at this time include: a command sent to the vehicle screen backlight controller to reduce the screen brightness and adjust it to a warm color temperature, and a command sent to the vehicle interior lighting controller to dim the lights to a warm color tone.

[0029] As a further limitation of the technical solution of the present invention, the preset comfort rules in the vehicle body controller also include transient light compensation rules, configured as follows: When the photothermal data shows that the solar irradiance values ​​of multiple target areas of the vehicle decrease by more than a preset proportion within a preset first time period and drop below the fourth threshold, and the vehicle speed is greater than zero, a compensation control command is generated and sent to the vehicle lighting controller to improve the brightness of the vehicle interior environment.

[0030] As a further limitation of the technical solution of the present invention, the system also includes a central control interaction module, which is communicatively connected to the body controller; The central control interaction module is used to receive user settings, including the on / off status and sensitivity parameters of the automatic adjustment function, and to send the user settings to the body controller. The body controller is configured to make judgments and generate instructions based on the comfort rules only when the automatic adjustment function is confirmed to be enabled according to the user settings.

[0031] As a further limitation of the technical solution of the present invention, the linkage adjustment includes the plurality of actuators coordinating to perform at least two of the following operations: continuous or segmented adjustment of the opening degree of the sunroof sunshade, adjustment of the brightness and color temperature of the vehicle screen, and adjustment of the brightness and color temperature of the interior ambient light and reading light.

[0032] As can be seen from the above technical solutions, this application has the following advantages: It uses a fiber optic grating sensor array as the core sensing element, and obtains temperature and solar irradiance data by calculating the wavelength offset of reflected light. This overcomes the limitations of traditional photosensitive sensors, which are characterized by single function and susceptibility to interference, enabling accurate and synchronous sensing of the light and heat state inside the vehicle, significantly improving measurement accuracy and reliability. It integrates and analyzes light and heat data with vehicle status data and external environmental data, and generates collaborative control commands based on preset comfort rules, avoiding the one-sidedness of single-data decision-making and making the adjustment strategy more aligned with actual driving and riding scenarios. It drives the sunroof sunshade, vehicle screen, and interior lighting to adjust in a coordinated manner, breaking down the barriers of independent control of each component and achieving integrated adaptive control of the in-vehicle light environment. This effectively solves problems such as adjustment lag and visual discomfort when ambient light changes, comprehensively improving driving comfort and safety. Attached Figure Description

[0033] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating the method provided in an embodiment of the present invention.

[0035] Figure 2 A block diagram of a system provided in an embodiment of the present invention. Detailed Implementation

[0036] To make the purpose, features, and advantages of this application more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solution protected by this application. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this application and in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] like Figure 1 As shown, this embodiment of the invention provides a method for adjusting in-vehicle light based on fiber Bragg grating sensing, comprising the following steps: S1. Fiber Bragg grating sensor arrays are deployed in multiple target areas inside the vehicle. By calculating the offset of the wavelength of the light reflected by the fiber Bragg grating sensor, photothermal data characterizing the photothermal state of each area is obtained. The photothermal data includes temperature values ​​and solar irradiance values. In this embodiment of the invention, multiple target areas include: the roof liner and the area around the windows for monitoring solar irradiance from the windows; the center console and dashboard surfaces for monitoring sunlight illuminating the in-vehicle screen and driver's area; and the shoulder and knee areas for monitoring sunlight illuminating the occupants' bodies. Accordingly, FBG sensors are arranged in the roof liner, around the windshield, side windows and sunroof, on the center console and dashboard surfaces, and in the shoulder and knee areas of the driver and passengers. Sensors around the roof liner and sunroof monitor the solar irradiance intensity and area temperature from the windshield, sunroof, and side windows; sensors on the center console and dashboard surfaces monitor sunlight directly illuminating the center screen and driver's area; and sensors in the shoulder / knee areas of the driver and passengers monitor sunlight illuminating the occupants for fine-tuning.

[0039] S2. During vehicle operation, the fiber optic grating sensor array collects photothermal data of each target area in real time and sends it to the vehicle body controller via the vehicle network. S3. The body controller integrates the photothermal data with the vehicle status data and external environment data, and makes a judgment based on preset comfort rules; when it is determined that there is a situation that needs adjustment, it generates a cooperative control command. S4. Send the coordinated control command to the actuators corresponding to the sunroof sunshade, vehicle screen and interior lights, and drive them to perform linkage adjustment to realize integrated adaptive control of the interior light environment.

[0040] The central processing unit of the vehicle body controller performs comprehensive analysis of the data, comprehensively processes all sensor data and vehicle status (such as vehicle speed and time), determines the next action to be performed, and determines whether the current vehicle status meets the control conditions. If the control conditions are met, it executes and issues control commands. When the FBG sensor in the roof area detects a sharp rise in temperature or a sustained high value, it determines the source and intensity of light, sets the opening degree of the sunshade based on the roof temperature, and combines other data such as time and rain sensor data to comprehensively determine the opening and closing needs of the sunshade. When the FBG sensor on the center console surface changes temperature, or when the system detects a change in ambient light mode (such as entering or exiting a tunnel), and strong sunlight is detected directly shining on the center console screen, the system will significantly increase the screen backlight brightness and automatically switch to high-contrast mode to ensure readability. Simultaneously, this signal will be linked to the sunshade control, suggesting or automatically closing part of the front sun visor. At night or in dim lighting conditions (when all FBG temperatures are low and the vehicle is at night), the system will automatically reduce screen brightness and adjust the color temperature to a warmer tone to reduce visual stimulation for the driver.

[0041] In bright light conditions, the interior is generally bright. The ambient lighting uses high brightness and a cool tone to harmonize with the external environment and enhance the brightness and technological feel of the cabin. Reading lights, when activated, also output high brightness. In low light conditions, the ambient lighting switches to low brightness and a warm tone to create a cozy and relaxing cabin atmosphere, preventing interference with the driver's vision at night. Upon entering a tunnel, the FBG sensor detects the disappearance of light and heat, and the system gently increases the ambient lighting brightness within a short time to compensate for the sudden loss of ambient light, reducing visual disorientation and discomfort for passengers.

[0042] The sunroof sunshade, central control screen, instrument panel, ambient lighting, and reading lights receive and execute commands from the vehicle body controller.

[0043] In this embodiment of the invention, calculating the wavelength offset of the reflected light from the fiber Bragg grating sensor specifically includes: based on the calibration function relationship between the offset and temperature and light intensity, calculating the wavelength offset into the temperature value and solar irradiance value of the corresponding region. The step of establishing the calibration function relationship includes: (1) Basic calibration: Before installing the sensor into the vehicle, it is first calibrated in a standard laboratory environment. The bare fiber grating (or coated FBG) is placed in a constant temperature chamber, and the temperature change is precisely controlled. And use a high-precision demodulator to record the corresponding wavelength offset. The temperature sensitivity coefficient of the FBG sensor can be obtained through linear fitting. .

[0044]

[0045] (2) Composite Calibration: Install the FBG sensor, which has undergone basic calibration and has a standard dark coating, onto the target area of ​​the vehicle. Perform the following calibration procedure in a controlled solar simulation laboratory or under actual outdoor sunlight: Step A: Under no-light conditions, expose the vehicle to different ambient temperatures and record the wavelength reference values ​​of the FBG. This is used to compensate for the influence of ambient background temperature.

[0046] Step B: Using a standard solar simulator, at known and precise levels of irradiance ( (Unit: W / m²) Irradiation of the area where the sensor is located.

[0047] Step C: Under each stable irradiation condition, record simultaneously: Actual solar irradiance measured by a high-precision standard radiometer .

[0048] FBG wavelength value measured by demodulator .

[0049] Calculate the wavelength offset relative to the reference value at the current ambient temperature. .

[0050] Step D: Pair a set of data ( Curve fitting was performed. Since the efficiency of light energy conversion to heat energy is nearly linear within a certain range, and the temperature change of the FBG is linearly related to the wavelength shift, therefore... and Linear or deterministic nonlinear functional relationships can usually be established between them, i.e., calibration functional relationships: In practical systems, the inverse function is usually... The coefficients are pre-stored in the body controller's memory in the form of lookup tables (LUTs) or polynomial coefficients.

[0051] During actual vehicle operation, the system performs the following operations: Real-time measurement of the current wavelength of the FBG .

[0052] Based on the current ambient temperature from the vehicle temperature sensor Call the corresponding wavelength reference value .

[0053] Calculate the effective wavelength offset: This offset is primarily attributed to solar radiation.

[0054] Will Substitute the pre-stored calibration function The current solar irradiance value can be directly calculated. .

[0055] At the same time, the results obtained from the basic calibration and The temperature rise at the sensor location can be estimated. .

[0056] In some embodiments, in S3, the vehicle status data includes vehicle speed and vehicle time information; the external environment data includes rain sensor data. The judgment is based on preset comfort rules, including heat load management rules: When the photothermal data shows that the temperature value of the roof or the area around the windows exceeds the first threshold or the positive rate of temperature change is greater than the first rate of change threshold, and the rain sensor data indicates that there is no rainfall, it is determined that there is a risk of thermal discomfort for the occupants, and an instruction to adjust the opening of the sunroof sunshade needs to be generated.

[0057] This rule aims to prevent excessively high interior temperatures caused by solar radiation, which could lead to heat discomfort for passengers.

[0058] The body controller acquires temperature data in real time from fiber Bragg grating sensors in the headliner and window perimeter areas. And calculate its real-time rate of change. Simultaneously, the status signal RS from the rain sensor is read via the CAN bus. A first temperature threshold is pre-stored in the system memory. and the first rate of change threshold The controller continuously performs the following judgment: If ( > or > Furthermore, RS indicates a risk of occupant heat discomfort when there is no rain. A control command is generated for the sunroof sunshade motor. This command includes a target opening value, which can be determined based on... Exceed amplitude or The size is mapped and calculated. The instruction is sent to the sunroof sunshade motor controller via the CAN bus, driving the sunshade to move to the calculated opening degree to block sunlight and reduce heat load at the source.

[0059] In some embodiments, the judgment is based on preset comfort rules, including anti-glare linkage rules: When the solar thermal data shows that the solar irradiance value on the surface of the center console or dashboard exceeds the second threshold, it is determined that there is a risk of screen glare; at this time, the generated collaborative control command includes a command to increase the brightness and contrast of the vehicle screen backlight, and a command to close or dim the corresponding side window sunshade.

[0060] This rule aims to eliminate glare caused by direct sunlight on in-vehicle screens and ensure the readability of displayed information.

[0061] The body controller acquires real-time solar irradiance data from fiber Bragg grating sensors on the center console and instrument panel surfaces. Pre-store the second irradiance threshold. ,like > The system was deemed to pose a risk of screen glare.

[0062] Generate the first sub-instruction: send it to the central control screen and instrument panel backlight controller. The instruction includes: increase the screen backlight brightness to the preset high brightness level and switch the display mode to high contrast mode.

[0063] Generate the second sub-command: send it to the sunroof sunshade or side window sunshade motor controller. The system then... The strongest sensor position determines the direction of sunlight and instructs the corresponding sunshade curtain to close or dim, thus physically blocking the light.

[0064] The screen's built-in brightness enhancement and physical light shielding work together to most effectively ensure display clarity under strong light, while avoiding new visual interference caused by excessive screen brightness when not under direct sunlight.

[0065] In some embodiments, the judgment is based on preset comfort rules, including dynamic light compensation rules: When the vehicle time information indicates that it is nighttime and the overall photothermal data is below the third threshold, it is determined that it is in a low-light environment; the generated collaborative control instructions at this time include instructions to reduce the brightness of the vehicle screen and adjust it to a warm color temperature, and instructions to dim the interior lights to a warm color tone.

[0066] This rule is used to automatically create a comfortable, non-glaring in-vehicle lighting environment at night or in dim lighting conditions.

[0067] The controller obtains vehicle time information. Time And illumination intensity data measured by fiber Bragg grating sensors in all areas of the vehicle. A third illumination intensity threshold is pre-stored. Nighttime conditions can be defined as a period of time between sunset and sunrise, or a combination of ambient light data. If the time is daytime and the maximum solar irradiance value among all fiber Bragg grating sensors is less than [a certain value], then [the condition is considered nighttime]. Upon determining that the environment is in low light / nighttime, a collaborative control command packet is generated and simultaneously sent to multiple actuators: To the screen backlight controller: Instructs to reduce the backlight brightness to a comfortable level and dynamically adjust the screen color temperature from a cool tone (e.g., 6500K) to a warm tone (e.g., 3000-4000K).

[0068] To the ambient lighting and reading light controller: This command lowers the brightness of all lighting units and uniformly adjusts the color temperature to a warm tone. By uniformly reducing brightness and switching to a warm tone, interference with the driver's nighttime vision is significantly reduced, creating a warm and relaxing cabin atmosphere and improving comfort and safety.

[0069] In some embodiments, the judgment is based on preset comfort rules, including transient light compensation rules: When the photothermal data shows that the solar irradiance values ​​of multiple target areas of the vehicle decrease by more than a preset proportion within a preset first time period and drop below the fourth threshold, and the vehicle speed is greater than zero, a compensation control command is generated to improve the brightness of the in-vehicle environment.

[0070] This rule is designed to address sudden changes in ambient light and darkness caused by vehicles entering tunnels, underground parking garages, etc., and to alleviate visual discomfort for occupants. The controller monitors in real time the solar irradiance values ​​reported by the fiber optic sensors on the windshield, side windows, and roof throughout the vehicle. and obtain the current vehicle speed V Pre-stored time window , decrease ratio threshold Fourth light intensity threshold and vehicle speed judgment threshold Calculation in the most recent The average percentage decrease in light intensity in each major area over a given time period: Select all areas maximum value and the minimum value of the current light intensity .like > and < and V > Upon detecting a sudden drop in light, such as entering a tunnel, the system generates a dynamic compensation command and sends it to the ambient lighting controller. This command doesn't immediately turn the lights to maximum brightness; instead, it controls the ambient lighting brightness to gradually, linearly, or curvilinearly increase from its current value to a preset moderate brightness compensation value over a shorter period. This compensation mechanism simulates the adaptation process of the human eye, providing a smooth brightness transition for passengers' visual system, effectively reducing the discomfort and visual disparity caused by momentary blindness, and improving the overall riding experience.

[0071] In some embodiments, before making a judgment based on the comfort rule, the method further includes: Receive and confirm user settings from the central control interaction module, the user settings including the on / off status and sensitivity parameters of the automatic adjustment function; execute the judgment and instruction generation steps of S3 only when the automatic adjustment function is enabled.

[0072] To ensure system flexibility and user sovereignty, all of the above-mentioned automatic adjustment functions are subject to user settings.

[0073] The vehicle's central control screen provides a settings interface where users can make two main settings: Main switch: Fully enable or disable the "Automatic In-Vehicle Light Ambient Adjustment" function.

[0074] Sensitivity parameters: These are provided by the user in the form of sliders or speed settings to adjust how responsive the system is to changes in photothermal activity (e.g., the speed of response or the offset of the trigger threshold).

[0075] After the vehicle body controller is started, it first reads and stores the user's settings AutoMode_Enable and Sensitivity_Level from the central control interaction module.

[0076] Before executing the aforementioned S3 step, which involves judging all comfort rules and generating instructions, the controller first checks the AutoMode_Enable flag.

[0077] If AutoMode_Enable is true, continue executing S3 and subsequent steps, and the generated instruction parameters can be modulated by the Sensitivity_Level parameter. Otherwise, skip all automatic adjustment logic and maintain each actuator in manual or default state.

[0078] In some embodiments, in S4, the coordinated adjustment includes a combination of at least two of the following operations: continuous or stepped adjustment of the sunroof sunshade opening, adjustment of the brightness and color temperature of the vehicle screen, and adjustment of the brightness and color temperature of the interior ambient lighting and reading lights. The coordinated control commands generated by the body controller are essentially a set of commands, broadcast or directed to multiple relevant execution controllers via the CAN bus.

[0079] Example of collaborative action: Scenario A, strong sunlight: The instruction set includes instructions to reduce the opening of the sunroof sunshade and to increase the brightness and contrast of the central control screen. The sunshade motor and the screen backlight controller receive and execute instructions almost simultaneously, achieving dual protection of physical shading and electronic enhancement.

[0080] Scenario B, entering the tunnel: The instruction set mainly includes instructions to gradually brighten the interior ambient lighting. After this instruction is issued, the ambient lighting controllers in all zones of the vehicle coordinately and consistently increase the brightness according to the pre-programmed gradient curve, creating an overall harmonious and compensated lighting environment.

[0081] Scenario C, Nighttime Driving: The instruction set includes instructions to reduce and warm up the screen color temperature and dim and warm up the interior lights. The in-vehicle screen, ambient lights, reading lights, etc., switch to a unified warm color tone and low brightness style, achieving integrated style adaptation of the entire vehicle's lighting environment.

[0082] Each actuator controller has pre-set drive logic corresponding to different commands. The realization of coordinated adjustment depends on the centralized decision-making and unified scheduling of the body controller, as well as the efficient and reliable communication of the vehicle network.

[0083] like Figure 2 As shown, this embodiment of the invention also provides an in-vehicle light adjustment system based on fiber Bragg grating sensing, comprising: A fiber optic grating sensor array module is distributed in multiple target areas inside the vehicle. It is used to obtain photothermal data that characterizes the photothermal state of each area by calculating the offset of the wavelength of the light reflected by the fiber optic grating sensor. The photothermal data includes temperature value and solar irradiance value. The data acquisition and transmission module is used to acquire photothermal data of each target area output by the fiber optic grating sensor array module in real time during vehicle operation, and transmit it through the vehicle network. The body controller, which is communicatively connected to the data acquisition and transmission module, the vehicle bus, and other auxiliary sensors, is used for: Receive the photothermal data, vehicle status data, and external environment data; The photothermal data is then fused with vehicle status data and external environment data. Judgments are made based on preset comfort rules; When it is determined that there is a situation requiring adjustment, a coordinated control command is generated; Multiple actuators are connected to the vehicle body controller via an in-vehicle network. The multiple actuators include at least a sunroof sunshade drive mechanism, an in-vehicle screen backlight controller, and an interior lighting controller, which are used to receive the coordinated control commands and perform linkage adjustments to achieve integrated adaptive control of the in-vehicle lighting environment.

[0084] In some embodiments, the target areas for the fiber optic grating sensing array module include: the roof lining and window perimeter area for monitoring solar irradiance from the vehicle windows; the center console and dashboard surface area for monitoring sunlight irradiating the vehicle screen and driver's area; and the occupant's shoulder and knee areas for monitoring sunlight irradiating the occupant's body.

[0085] In some embodiments, the fiber Bragg grating sensor array module includes a calculation unit, which is configured to: calculate the wavelength shift as the temperature value and solar irradiance value of the corresponding region based on the calibration function relationship between the wavelength shift of the reflected light from the fiber Bragg grating sensor and the temperature and light intensity.

[0086] In some embodiments, the vehicle status data acquired by the body controller through communication includes vehicle speed and vehicle time information; the external environmental data acquired through communication includes rain sensor data. The preset comfort rules within the body controller include thermal load management rules, configured as follows: When the photothermal data shows that the temperature value of the roof or the area around the windows exceeds a first threshold or the positive rate of temperature change is greater than a first rate of change threshold, and the rain sensor data indicates that there is no rainfall, it is determined that there is a risk of thermal discomfort for the occupants, and a control command to adjust the opening of the sunroof sunshade is generated.

[0087] In some embodiments, the preset comfort rules within the vehicle body controller also include anti-glare linkage rules, configured as follows: When the solar irradiance value on the surface of the center console or dashboard exceeds the second threshold, and it is determined that there is a risk of screen glare, the generated control commands include: a command sent to the vehicle screen backlight controller to increase the brightness and contrast of the screen backlight, and a command sent to the sunroof sunshade drive mechanism to close or darken the corresponding side window sunshade.

[0088] In some embodiments, the preset comfort rules within the vehicle body controller also include dynamic light compensation rules, configured as follows: When the vehicle time information indicates that it is nighttime and the overall photothermal data is below the third threshold, it is determined that it is in a low-light environment; the control commands generated at this time include: a command sent to the vehicle screen backlight controller to reduce the screen brightness and adjust it to a warm color temperature, and a command sent to the vehicle interior lighting controller to dim the lights to a warm color tone.

[0089] In some embodiments, the preset comfort rules within the vehicle body controller also include transient light compensation rules, configured as follows: When the photothermal data shows that the solar irradiance values ​​of multiple target areas of the vehicle decrease by more than a preset proportion within a preset first time period and drop below the fourth threshold, and the vehicle speed is greater than zero, a compensation control command is generated and sent to the vehicle lighting controller to improve the brightness of the vehicle interior environment.

[0090] In some embodiments, the system further includes a central control interaction module, which is communicatively connected to the body controller; The central control interaction module is used to receive user settings, including the on / off status and sensitivity parameters of the automatic adjustment function, and to send the user settings to the body controller. The body controller is configured to make judgments and generate instructions based on the comfort rules only when the automatic adjustment function is confirmed to be enabled according to the user settings.

[0091] In some embodiments, the linkage adjustment includes the plurality of actuators coordinating to perform at least two of the following operations: continuous or stepped adjustment of the sunroof sunshade opening, adjustment of the brightness and color temperature of the vehicle screen, and adjustment of the brightness and color temperature of the interior ambient lighting and reading lights.

[0092] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0093] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0094] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for adjusting in-vehicle light based on fiber Bragg grating sensing, characterized in that, Includes the following steps: S1. Fiber Bragg grating sensor arrays are deployed in multiple target areas inside the vehicle. By calculating the offset of the wavelength of the light reflected by the fiber Bragg grating sensor, photothermal data characterizing the photothermal state of each area is obtained. The photothermal data includes temperature values ​​and solar irradiance values. S2. During vehicle operation, the fiber optic grating sensor array collects photothermal data of each target area in real time and sends it to the vehicle body controller via the vehicle network. S3. The body controller integrates the photothermal data with the vehicle status data and external environment data, and makes a judgment based on preset comfort rules; when it is determined that there is a situation that needs adjustment, it generates a cooperative control command. S4. Send the coordinated control command to the actuators corresponding to the sunroof sunshade, vehicle screen and interior lights, and drive them to perform linkage adjustment to realize integrated adaptive control of the interior light environment. The multiple target areas include: the roof liner and window perimeter area for monitoring solar irradiance from the windows; the center console and dashboard surface area for monitoring sunlight irradiating the in-vehicle screen and driver's area; and the occupant's shoulder and knee areas for monitoring sunlight irradiating the occupant's body. In S3, the vehicle status data includes vehicle speed and vehicle time information; the external environment data includes rain sensor data. The judgment is based on preset comfort rules, including heat load management rules: When the photothermal data shows that the temperature value of the roof or the area around the windows exceeds the first threshold or the positive rate of temperature change is greater than the first rate of change threshold, and the rain sensor data indicates that there is no rainfall, it is determined that there is a risk of thermal discomfort for the occupants, and an instruction to adjust the opening of the sunroof sunshade needs to be generated. The judgment is based on preset comfort rules, including anti-glare linkage rules: When the solar thermal data shows that the solar irradiance value on the surface of the center console or dashboard exceeds the second threshold, it is determined that there is a risk of screen glare; at this time, the generated collaborative control command includes a command to increase the brightness and contrast of the vehicle screen backlight, and a command to close or dim the corresponding side window sunshade. The judgment is based on preset comfort rules, including transient light compensation rules: When the photothermal data shows that the solar irradiance intensity values ​​of multiple target areas throughout the vehicle decrease by more than a preset proportion within a preset first time period and fall below a fourth threshold, and the vehicle speed is greater than zero, a compensation control command for improving the brightness of the vehicle interior environment is generated, including: The controller monitors in real time the solar irradiance values ​​reported by the fiber optic sensors on the windshield, side windows, and roof of the vehicle. And obtain the current vehicle speed V; pre-store the time window. , decrease ratio threshold Fourth light intensity threshold and vehicle speed judgment threshold ; Calculate in the most recent The average percentage decrease in light intensity in each major area over a given time period: Select all regions maximum value and the minimum value of the current light intensity ;like > and < And V> If the vehicle encounters a sudden drop in light, and if it enters a tunnel, a dynamic compensation command is generated and sent to the ambient lighting controller inside the vehicle. This command does not immediately turn the lights up to the brightest level, but rather controls the ambient lighting brightness to gradually, linearly or curvilinearly increase from the current value to a preset medium brightness compensation value over a shorter period of time.

2. The in-vehicle light adjustment method based on fiber Bragg grating sensing according to claim 1, characterized in that, The calculation of the wavelength offset of the reflected light from the fiber Bragg grating sensor specifically includes: based on the calibration function relationship between the offset and temperature and light intensity, the wavelength offset is calculated into the temperature value and solar irradiance value of the corresponding region.

3. The in-vehicle light adjustment method based on fiber Bragg grating sensing according to claim 1, characterized in that, The judgment is based on preset comfort rules, including dynamic light compensation rules: When the vehicle time information indicates that it is nighttime and the overall photothermal data is below the third threshold, it is determined that it is in a low-light environment; the generated collaborative control instructions at this time include instructions to reduce the brightness of the vehicle screen and adjust it to a warm color temperature, and instructions to dim the interior lights to a warm color tone.

4. The in-vehicle light adjustment method based on fiber Bragg grating sensing according to claim 1, characterized in that, Before making a judgment based on the aforementioned comfort rules, the following is also included: Receive and confirm user settings from the central control interaction module, the user settings including the on / off status and sensitivity parameters of the automatic adjustment function; execute the judgment and instruction generation steps of S3 only when the automatic adjustment function is enabled.

5. The in-vehicle light adjustment method based on fiber Bragg grating sensing according to claim 1, characterized in that, In S4, the linkage adjustment includes a combination of at least two of the following operations: continuous or segmented adjustment of the sunroof sunshade opening, adjustment of the brightness and color temperature of the vehicle screen, and adjustment of the brightness and color temperature of the interior ambient lights and reading lights.

6. A vehicle interior light adjustment system based on fiber Bragg grating sensing, applicable to the vehicle interior light adjustment method based on fiber Bragg grating sensing as described in any one of claims 1-5, characterized in that, include: A fiber optic grating sensor array module is distributed in multiple target areas inside the vehicle. It is used to obtain photothermal data that characterizes the photothermal state of each area by calculating the offset of the wavelength of the light reflected by the fiber optic grating sensor. The photothermal data includes temperature value and solar irradiance value. The data acquisition and transmission module is used to acquire photothermal data of each target area output by the fiber optic grating sensor array module in real time during vehicle operation, and transmit it through the vehicle network. The body controller, which is communicatively connected to the data acquisition and transmission module, the vehicle bus, and other auxiliary sensors, is used for: Receive the photothermal data, vehicle status data, and external environment data; The photothermal data is then fused with vehicle status data and external environment data. Judgments are made based on preset comfort rules; When it is determined that there is a situation requiring adjustment, a coordinated control command is generated; Multiple actuators are connected to the vehicle body controller via an in-vehicle network. The multiple actuators include at least a sunroof sunshade drive mechanism, an in-vehicle screen backlight controller, and an interior lighting controller, which are used to receive the coordinated control commands and perform linkage adjustments to achieve integrated adaptive control of the in-vehicle lighting environment.

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