Intelligent light environment detection and adjustment system and method for high-speed train

Abstract

This invention provides an intelligent light environment detection and adjustment system and method for high-speed trains. The system includes an optical illuminance module, a light imaging camera module, a data processing module, a photochromic glass control module, and an interior lighting adjustment module. It introduces a dual detection scheme combining external light detection through the windows and internal light detection within the carriage, ensuring comprehensive perception of the light environment inside and outside the carriage. Through a specific algorithm, it dynamically calculates and provides real-time feedback on glare in the passenger's field of vision, enabling accurate detection and rapid response to glare issues. Simultaneously, it can achieve intelligent adjustment of the photochromic glass and dynamic adjustment of the interior lighting, automatically responding to changes in external light, reducing the direct impact of strong light on the carriage interior, ensuring a uniform and soft light environment, and reducing visual fatigue. Therefore, it can effectively improve the management of the light environment inside high-speed train carriages, reduce the impact of glare on passengers and drivers, and improve operational safety and comfort.

Description

Technical Field

[0001] This invention relates to the field of high-speed train lighting technology, and in particular to an intelligent lighting environment detection and adjustment system and method for high-speed trains. Background Technology

[0002] In the current high-speed train operating environment, changes in lighting conditions have a significant impact on passenger comfort and safety. Natural light from outside the carriages, especially at high speeds, often fluctuates drastically due to changes in train speed and route, resulting in unstable lighting conditions inside the carriages. This external light enters the carriages directly through the windows, easily causing glare at some seats, affecting passenger visual comfort and potentially interfering with driver operations, thus impacting the safety of high-speed train operation.

[0003] Some existing train lighting systems rely mainly on manual or preset modes for light adjustment, which cannot respond to changes in external light in real time, resulting in the inability to adjust the lighting environment inside the carriages in a timely manner. In addition, although some trains use photochromic glass technology, they lack dynamic detection and real-time feedback on the lighting environment inside and outside the carriages, resulting in delayed or inaccurate adjustment of the glass's light transmittance, which cannot effectively solve the glare problem encountered by passengers in different seats.

[0004] Another common problem is that existing train lighting systems do not fully consider the impact of external natural light sources on the interior lighting environment. They typically use fixed lighting brightness and cannot flexibly adjust the interior lighting level according to changes in external light. This design makes it easy for excessive brightness to appear in the passenger's field of vision under strong sunlight. Prolonged exposure to glare can lead to visual fatigue and even safety hazards.

[0005] In summary, the main shortcomings of the existing technology include:

[0006] The lack of real-time detection of changes in external light makes it impossible to adjust the lighting environment inside the vehicle in a timely manner; the existing tinted glass is not precise enough to adapt to changes in light at high speeds; and the interior lighting system fails to effectively coordinate with the external lighting environment, making it impossible to dynamically balance the difference in light between the inside and outside of the vehicle, which can easily lead to glare problems.

[0007] Therefore, there is an urgent need for a system that can detect the light environment inside and outside the carriage in real time and dynamically adjust the light transmittance of the windows and the intensity of the interior lighting to improve the visual comfort of passengers and enhance the safety of high-speed train operation. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a light environment detection and adjustment system with real-time light detection and intelligent adjustment functions. Through comprehensive analysis and automatic adjustment of the light environment inside and outside the train carriage, it can effectively alleviate the impact of glare on passengers and drivers, improve passenger comfort, and ensure the safety of high-speed train operation.

[0009] To achieve the above objectives, the present invention provides an intelligent light environment detection and adjustment system for high-speed trains, including an optical illuminance module, a light imaging camera module, a data processing module, a photochromic glass control module, and an interior lighting adjustment module.

[0010] The optical illuminance module is installed outside the vehicle window to detect the intensity and changes of external light in real time, and transmits the collected external light data to the data processing module in real time.

[0011] The optical imaging camera module is installed at multiple locations inside the carriage to capture the light environment inside the carriage in real time and generate pseudo-color images to detect high-brightness lighting conditions in specific areas of the carriage, and transmit the collected image data to the data processing module in real time.

[0012] The data processing module is used to receive and analyze the illumination data inside and outside the carriage in real time, calculate the glare intensity in the passenger's field of vision, determine whether there is a glare problem in the carriage, and send instructions to the photochromic glass control module and the in-vehicle lighting adjustment module.

[0013] The photochromic glass control module is installed on the vehicle window and is used to automatically adjust the light transmittance of the glass based on the external light data provided by the data processing module.

[0014] The in-vehicle lighting adjustment module is installed inside the vehicle compartment and is used to dynamically adjust the brightness and color temperature of the in-vehicle lighting based on the analysis results of the data processing module.

[0015] Furthermore, the optical illuminance module includes one or more optical illuminance meters that can capture dynamic changes in external light, including the intensity and angle of sunlight and the effects of shadows.

[0016] Furthermore, the optical imaging camera module includes multiple optical imaging cameras, which have a high dynamic range function, enabling them to maintain the accuracy of illumination information and generate pseudo-color images in both strong and low light environments.

[0017] Furthermore, the data processing module uses a lighting calculation model to calculate the glare intensity in the passenger's field of vision and determine whether there is a glare problem in the carriage.

[0018] Furthermore, the photochromic glass control module controls the adjustment range of the photochromic glass from fully transparent to partially opaque, ensuring that the light inside the carriage remains within a suitable range.

[0019] Furthermore, the in-vehicle lighting adjustment module can automatically reduce the brightness of the in-vehicle lighting, or reduce the impact of glare by adding soft supplemental lighting.

[0020] This invention also provides a method for intelligent light environment detection and adjustment of high-speed trains, applied to the intelligent light environment detection and adjustment system of a high-speed train as described above, comprising the following steps:

[0021] S1 detects the intensity and angle of light outside the window in real time, uploads the external light data in real time, captures the light distribution inside the carriage in real time, generates pseudo-color images and uploads them in real time.

[0022] S2, taking into account both external and internal lighting conditions, calculates the glare probability for each seat using a lighting calculation model. When it detects glare that causes discomfort in the passenger's field of vision, it issues an adjustment command to change the light transmittance of the tinted glass, as well as the brightness and color temperature of the interior lighting.

[0023] Furthermore, the illumination calculation model is a sunlight glare probability model, which is calculated based on the brightness data captured by the camera and the ambient illuminance, as shown in the following formula:

[0024]

[0025] Wherein, DGP is the probability value of glare intensity, ranging from 0 to 1; a higher DGP value indicates more severe glare. s The brightness of the glare source is measured by a photoluminescence camera and is expressed in cd / m². 2 ω represents the glare source's angle of view in the passenger's field of vision, measured in sr; E υ The vertical illuminance is measured in lux; a and b are experimental fitting constants.

[0026] Furthermore, in S2, the light transmittance of the photochromic glass is adjusted based on the calculated DGP value, and the adjustment formula is as follows:

[0027] T = T max -κ1×DGP

[0028] Among them, T max κ1 represents the maximum light transmittance of the photochromic glass; κ1 is the adjustment coefficient, which depends on the specific response characteristics of the photochromic glass.

[0029] Furthermore, in S2, the interior lighting brightness is adjusted based on the calculated DGP value, and the adjustment formula is as follows:

[0030] I = Imax ×(1-κ2×DGP)

[0031] Among them, I max κ2 represents the maximum brightness of the vehicle interior lighting, measured in lux; κ2 is the adjustment coefficient.

[0032] The above-described solution of the present invention has the following beneficial effects:

[0033] The intelligent light environment detection and adjustment system and method for high-speed trains provided by this invention adopts a combination of optical illuminance and optical imaging camera to detect the natural light outside the windows and the light environment inside the carriage in real time. In particular, the optical imaging camera has a high dynamic range (HDR) function, which can accurately capture high-brightness areas and potential glare sources inside the carriage, providing accurate illumination data for subsequent adjustment. This dual detection ensures that changes in the light environment inside and outside the carriage can be fully perceived. Especially when there are drastic changes in external light, the system can respond quickly and make corresponding adjustments.

[0034] This invention employs an intelligent data processing module based on the Daylight Glare Probability Model (DGP), which can dynamically calculate the degree of glare in the passenger's field of vision based on the detected illumination data, and promptly determine whether there is a glare problem. Through this real-time calculation, the system can accurately identify the glare source and respond quickly when glare affects the visual comfort of passengers or drivers. Compared with single illumination intensity detection, it can better improve visual comfort and ensure train operation safety.

[0035] This invention realizes the function of automatically adjusting the light transmittance of photochromic glass. It can dynamically adjust the transparency of the glass according to the intensity of external light, reduce the interference of strong external light on the vision of passengers in the vehicle, and at the same time adjust the brightness and color temperature of the interior lighting according to the real-time analysis results, so as to ensure that the interior lighting environment remains uniform and soft when the external light changes greatly, reduce the visual fatigue of passengers, and ensure that passengers can enjoy a comfortable visual experience under different lighting conditions.

[0036] This invention has a real-time dynamic adjustment capability. Compared with traditional dimming schemes that rely on fixed modes, it can continuously and dynamically adjust the light environment according to changes in the lighting conditions inside and outside the carriage. Therefore, it can effectively cope with the rapidly changing external environment during high-speed train operation and ensure that lighting problems will not have a negative impact on the vision of passengers and drivers.

[0037] Other beneficial effects of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0038] Figure 1 This is a schematic block diagram of the system of the present invention.

[0039] [Explanation of Labels in the Attached Image]

[0040] 10 - Optical illumination module; 20 - Optical imaging camera module; 30 - Data processing module; 40 - Photochromic glass control module; 50 - Interior lighting adjustment module. Detailed Implementation

[0041] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0042] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0043] It should also be noted that the illustrations provided in the following embodiments are merely schematic representations of the basic concept of this disclosure. The illustrations only show components relevant to this disclosure and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0044] like Figure 1 As shown, an embodiment of the present invention provides an intelligent light environment detection and adjustment system for high-speed trains, including an optical illuminance module 10, a light imaging camera module 20, a data processing module 30, a photochromic glass control module 40, and an interior lighting adjustment module 50.

[0045] In this embodiment, the optical illuminance module 10 is installed on the outside of the vehicle window to detect the intensity and changes of external light in real time. The optical illuminance module 10 can be one or more optical illuminance meters, which capture the dynamic changes in external light, including the intensity and angle of sunlight and the influence of shadows, and transmit the collected external light data to the data processing module 30 in real time.

[0046] In this embodiment, the optical imaging camera module 20 is arranged in multiple locations within the carriage, especially within the passengers' field of vision, to capture the lighting environment inside the carriage in real time. The optical imaging camera module 20 can be multiple optical imaging cameras with high dynamic range (HDR) functionality, capable of maintaining the accuracy of lighting information in both strong and low light environments, and generating pseudo-color images for detecting high-brightness lighting conditions in specific areas within the carriage. Similarly, it transmits the acquired image data to the data processing module 30 in real time.

[0047] In this embodiment, the data processing module 30 is communicatively connected to the optical illuminance module 10 and the optical imaging camera module 20, enabling it to receive and analyze real-time illumination data inside and outside the carriage. The data processing module 30 uses an illumination calculation model (such as DGP: Daylight Glare Probability) to calculate the glare intensity in the passenger's field of vision and determine whether glare problems exist inside the carriage. The data processing module 30 also combines external illumination intensity and its changes to send commands to the tinted glass control module 40 and the interior lighting adjustment module 50 to dynamically adjust the lighting environment inside the carriage.

[0048] In this embodiment, the photochromic glass control module 40 is installed on the vehicle window and is communicatively connected to the data processing module 30. Based on the external light data provided by the data processing module 30, the photochromic glass control module 40 can automatically adjust the light transmittance of the glass to reduce the impact of strong external light on the interior lighting environment of the vehicle. The adjustment range of the photochromic glass ranges from fully transparent to partially opaque, ensuring that the interior lighting remains within a suitable range, especially effectively reducing glare under strong sunlight.

[0049] In this embodiment, the interior lighting adjustment module 50 is located inside the vehicle compartment and is communicatively connected to the data processing module 30. Based on the analysis results from the data processing module 30, the interior lighting adjustment module 50 dynamically adjusts the brightness and color temperature of the interior lighting. When external light is too strong or a specific area inside the vehicle experiences high brightness, the interior lighting adjustment module 50 can automatically reduce the brightness of the interior lighting or reduce glare by adding soft supplementary lighting.

[0050] As described above, the intelligent light environment detection and adjustment system for high-speed trains provided in this embodiment uses the optical illuminance module 10 to detect the intensity and angle changes of light outside the windows in real time, especially the changes in sunlight intensity and reflected light when the high-speed train is running. This data is then transmitted in real time to the data processing module 30. The optical imaging camera module 20 captures the light distribution inside the carriage, generates a pseudo-color image, and uploads it to the data processing module 30 in real time. The data processing module 30 receives the light data from inside and outside the carriage, combines the external light and the interior lighting conditions, and calculates the glare probability for each seat. When it detects glare that may cause discomfort in the passenger's field of vision, the data processing module 30 sends adjustment commands to the tinted glass control module 40 and the interior lighting adjustment module 50 to adjust the lighting conditions inside the carriage. This system employs a dual detection approach, combining external light detection through the windows with internal light detection within the carriage. This ensures comprehensive awareness of the light environment both inside and outside the carriage. Through a specific algorithm, it dynamically calculates and provides real-time feedback on glare in the passenger's field of vision, enabling accurate detection and rapid response to glare issues. Simultaneously, it can intelligently adjust the tinted glass and dynamically adjust the interior lighting, automatically adapting to changes in external light, reducing the direct impact of strong light on the carriage interior, ensuring a uniform and soft lighting environment, and minimizing visual fatigue. Therefore, it effectively improves the management of the light environment within high-speed train carriages, reduces the impact of glare on passengers and drivers, and enhances operational safety and comfort.

[0051] It is worth mentioning that the system in this embodiment can be continuously optimized. It can further predict future changes in illumination and make adjustments in advance through long-term data accumulation and analysis, such as through deep learning models.

[0052] In a preferred embodiment, the optical illuminance meter has a measurement range of 0.100,000 lx and a response time of ≤1 second; the optical imaging camera has a resolution of at least 1080p, supports HDR, and has a frame rate of 60 frames / second; the photochromic glass has a transmittance adjustment range of 5% to 90%; and the data processing module has a processing latency of ≤0.1 seconds.

[0053] Based on the same inventive concept, this embodiment also provides a method for intelligent light environment detection and adjustment of high-speed trains, specifically including the following steps:

[0054] S1 detects the intensity and angle of light outside the window in real time, uploads the external light data in real time, captures the light distribution inside the carriage in real time, generates pseudo-color images and uploads them in real time.

[0055] S2, taking into account both external and internal lighting conditions, calculates the glare probability for each seat using a lighting calculation model. When it detects glare in the passenger's field of vision that may cause discomfort, it issues an adjustment command to change the light transmittance of the tinted glass, as well as the brightness and color temperature of the interior lighting.

[0056] In this embodiment, the illumination calculation model used is the Daylight Glare Probability (DGP) model. DGP is calculated based on the brightness data captured by the camera and the ambient illuminance, as shown in the following formula:

[0057]

[0058] Wherein, DGP is the probability value of glare intensity, ranging from 0 to 1. Generally, the higher the DGP value, the more severe the glare. Commonly used glare judgment criteria are:

[0059] DGP < 0.35: No obvious glare; 0.35 ≤ DGP < 0.45: Slight glare; 0.45 ≤ DGP < 0.55: Moderate glare; DGP ≥ 0.55: Strong glare.

[0060] Among them, L s The brightness of the glare source is measured by a photoluminescence camera and is expressed in cd / m². 2 The optical imaging camera can capture high-brightness areas inside the carriage and obtain the brightness value of high-brightness light sources within its field of view; ω is the angle of view of the glare source in the passenger's field of view, measured in sr (solid angle), which can also be calculated from the image captured by the optical imaging camera; E υ The ambient vertical illuminance, measured in lux, is measured in real time by an optical illuminance meter installed outside the vehicle window. This value reflects the intensity of external light, especially the effect of sunlight on the interior of the vehicle. a and b are experimental fitting constants, usually determined based on environmental conditions or through experiments. For sunlight glare, commonly used empirical values ​​are: a = 0.16, b = 0.50.

[0061] In S2, to dynamically adjust the light transmittance T of the photochromic glass and the brightness I of the interior lighting, the data processing module adjusts these parameters based on the calculated DGP value. The adjustment formula for the light transmittance of the photochromic glass is:

[0062] T = T max -κ1×DGP

[0063] Among them, T maxThe maximum transmittance (DGP) of the photochromic glass is typically 90%; the κ1 adjustment factor depends on the specific response characteristics of the photochromic glass and usually ranges from 0.5 to 1.0. A higher DGP value results in a lower transmittance (T) to reduce natural light entering the cabin and thus reduce glare.

[0064] The formula for adjusting the brightness of the vehicle's interior lighting is as follows:

[0065] I = I max ×(1-κ2×DGP)

[0066] Among them, I max The maximum brightness of the interior lighting is expressed in lux and depends on the design requirements of the high-speed train. k2 is the adjustment coefficient, typically ranging from 0.5 to 1.0. As the DGP value increases, the brightness of the interior lighting gradually decreases to avoid excessive light intensity causing discomfort to passengers. Conversely, if the DGP value is low, the brightness of the interior lighting can be moderately increased to provide a comfortable lighting environment.

[0067] Based on the above methods, the system's data processing module can effectively calculate glare intensity and automatically adjust the tinted glass and interior lighting according to the glare situation, optimizing the light environment inside the vehicle. Furthermore, it can continuously adjust the tinted glass and interior lighting through real-time data feedback to ensure that the light environment is always kept within a comfortable range.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An intelligent light environment detection and adjustment system for high-speed trains, characterized in that, It includes an optical illuminance module, an optical imaging camera module, a data processing module, a photochromic glass control module, and an interior lighting adjustment module; The optical illuminance module is installed outside the vehicle window to detect the intensity and changes of external light in real time, and transmits the collected external light data to the data processing module in real time. The optical imaging camera module is installed at multiple locations inside the carriage to capture the light environment inside the carriage in real time and generate pseudo-color images to detect high-brightness lighting conditions in specific areas of the carriage. The acquired image data is transmitted to the data processing module in real time. The optical imaging camera module includes multiple optical imaging cameras. The data processing module is used to receive and analyze the illumination data inside and outside the carriage in real time, calculate the glare intensity in the passenger's field of vision, determine whether there is a glare problem in the carriage, and send instructions to the photochromic glass control module and the in-vehicle lighting adjustment module. The data processing module calculates the glare intensity in the passenger's field of vision using a lighting calculation model to determine whether there is a glare problem in the carriage. The illumination calculation model is a sunlight glare probability model, which is calculated based on the brightness data captured by the optical imaging camera and the ambient illuminance, as shown in the following formula: ； DGP is the probability value of glare intensity, which ranges from 0 to 1. The higher the DGP value, the more severe the glare. The brightness of the glare source is measured by a light imaging camera and is expressed in cd / m². The angle of view of the glare source in the passenger's field of vision is expressed in seconds (sr). This refers to the ambient vertical illuminance, measured in lux. , All are experimental fitting constants; The data processing module adjusts the light transmittance T of the photochromic glass and the brightness of the interior lighting based on the calculated DGP value. ; The photochromic glass control module is installed on the vehicle window and is used to automatically adjust the light transmittance of the glass based on the external light data provided by the data processing module. The light transmittance of the photochromic glass is adjusted based on the calculated DGP value. The adjustment formula is as follows: ； in, This represents the maximum light transmittance of the photochromic glass. The adjustment factor depends on the specific response characteristics of the photochromic glass; The in-vehicle lighting adjustment module is installed inside the vehicle compartment and is used to dynamically adjust the brightness and color temperature of the in-vehicle lighting based on the analysis results of the data processing module. The interior lighting brightness is adjusted based on the calculated DGP value, using the following formula: ； in, This refers to the maximum brightness of the vehicle's interior lighting, measured in lux. This is the adjustment coefficient.

2. The intelligent light environment detection and adjustment system for high-speed trains according to claim 1, characterized in that, The optical illuminance module includes one or more optical illuminance meters that can capture dynamic changes in external light, including the intensity and angle of sunlight and the effects of shadows.

3. The intelligent light environment detection and adjustment system for high-speed trains according to claim 1, characterized in that, The optical imaging camera has a high dynamic range function, which can maintain the accuracy of illumination information in both strong and low light environments and generate pseudo-color images.

4. The intelligent light environment detection and adjustment system for high-speed trains according to claim 1, characterized in that, The photochromic glass control module controls the adjustment range of the photochromic glass from fully transparent to partially opaque, ensuring that the light inside the carriage remains within a suitable range.

5. The intelligent light environment detection and adjustment system for high-speed trains according to claim 1, characterized in that, The in-vehicle lighting adjustment module can automatically reduce the brightness of the in-vehicle lighting or reduce the impact of glare by adding soft supplemental lighting.

6. A method for intelligent light environment detection and adjustment of high-speed trains, applied to an intelligent light environment detection and adjustment system for high-speed trains as described in any one of claims 1-5, characterized in that, Includes the following steps: S1 detects the intensity and angle of light outside the window in real time, uploads the external light data in real time, captures the light distribution inside the carriage in real time, generates pseudo-color images and uploads them in real time. S2, taking into account both external and internal lighting conditions, calculates the glare probability for each seat using a lighting calculation model. When it detects glare that causes discomfort in the passenger's field of vision, it issues an adjustment command to change the light transmittance of the tinted glass, as well as the brightness and color temperature of the interior lighting.

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