Method and System for Controlling Discoloring Glass Based on Calculation of Input Energy from Sunlight

Abstract

The present invention provides a method and system for controlling photochromic glass based on calculation of sunlight input energy, comprising: step 1: determining the control glass area that needs to be color-changed according to a preset judgment method; step 2: obtaining the chromaticity of the photochromic glass in the control glass area according to the first sunlight energy input from the control glass area; step 3: controlling the chromaticity of the photochromic glass according to the chromaticity. Compared with the prior art, the present invention utilizes the color-changing directionality of the whole vehicle's photochromic glass to provide shielding for sunlight and improve human comfort. The control method also corrects the degree of color change according to the ambient temperature to improve human comfort in different environments. After controlling the glass to change color, the system can also estimate the sunlight energy input into the vehicle under the current glass chromaticity, which is used for the calculation of the vehicle temperature control for sunlight input in the automatic air-conditioning control, and the comfort adjustment, thereby taking into account both comfort and energy saving purposes.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive intelligence. Specifically, it relates to a method and system for controlling variable-color glass based on sunlight input energy calculation, and particularly to a method and system for controlling variable-color glass based on sunlight input energy calculation and sunlight input direction determination. Background Art

[0002] Due to the lack of control algorithms and systems, it is impossible to balance comfort, light transmittance, and field of view. Therefore, at present, variable-color glass is usually only applied to the roof of the vehicle and not to the front and rear windshield glass and the side glass around. However, the present invention can accurately specify a certain piece of glass or even a certain area of a certain piece of glass for color change, and can accurately control the degree of color change / light transmittance, so as to balance comfort, glass light transmittance, and field of view as much as possible to improve driving safety. Then, it can also calculate the true solar radiation energy inside the vehicle according to the color change rate / light transmittance of the current glass and input it to the air-conditioning controller for certain compensation to balance comfort and energy conservation.

[0003] Patent document CN113306485A discloses a method and system for controlling an automotive roof based on electrochromic glass. The present invention achieves the effect of adaptively controlling the color change of the glass roof by collecting the external light and the temperature inside and outside the vehicle. At the same time, combined with the opening and closing of the air conditioner and the sunroof, the temperature inside the vehicle is controlled. Based on the color control of the glass roof, the effect of a starry sky roof of the glass roof is realized through LED or light guide technology; at the same time, with the help of the composite structure of the glass, the heat insulation performance is improved, so that the vehicle interior is warm in winter and cool in summer. However, this method does not solve the technical problem of controlling the variable-color glass of the front and rear windshield glass and the side glass around. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for controlling variable-color glass based on sunlight input energy calculation.

[0005] According to a variable-color glass control system based on sunlight input energy calculation provided by the present invention, it includes:

[0006] Step 1: Determine the control glass area that needs to be color-controlled according to a preset determination method;

[0007] Step 2: Obtain the chromaticity of the variable-color glass in the control glass area according to the first solar radiation energy input from the control glass area;

[0008] Step 3: Control the chromaticity of the variable-color glass according to the chromaticity.

[0009] Preferably, the control glass area includes the sunroof glass. Step 1 includes:

[0010] Step 101: Determine whether to perform color change control on the skylight glass according to the solar altitude angle and a preset angle;

[0011] Or;

[0012] Step 102: Determine whether to perform color change control on the skylight glass according to the light spot formed by the incident sunlight irradiating the vehicle occupants;

[0013] Or;

[0014] Step 103: Determine whether it is necessary to perform color change control on the skylight glass according to the second solar energy and a preset threshold.

[0015] Preferably, the controlled glass area includes the front, rear, left, and right side glasses and the front and rear windshield glasses, and each controlled glass area corresponds to a direction. Step 1 further includes:

[0016] Step 104: Determine whether to perform color change control on the glass in the corresponding direction according to the light spots formed by the incident sunlight irradiating the vehicle occupants in each direction;

[0017] Or;

[0018] Step 105: Determine whether to perform color change control on the glass in the corresponding direction according to the third solar energy in each direction and a preset threshold.

[0019] Preferably, Step 2 includes:

[0020] Step 201: Determine the energy limit value of the corresponding color-changing glass according to the first solar energy;

[0021] Step 202: Obtain the calculated transmittance of the color-changing glass according to the energy limit value;

[0022] Step 203: Determine the chromaticity of the corresponding color-changing glass according to the calculated transmittance.

[0023] Preferably, Step 203 includes:

[0024] Step 2031: Obtain the actual transmittance according to the calculated transmittance and the minimum transmittance of the color-changing glass;

[0025] Step 2032: Determine the chromaticity of the color-changing glass according to the actual transmittance.

[0026] According to a color-changing glass control system based on sunlight input energy calculation provided by the present invention, it includes:

[0027] Module M1: Determine the controlled glass area that needs to perform color change control according to a preset determination system;

[0028] Module M2: Obtain the chromaticity of the electrochromic glass in the control glass area based on the first sunlight energy input from sunlight to the control glass area;

[0029] Module M3: Control the chromaticity of the electrochromic glass according to the chromaticity.

[0030] Preferably, the control glass area includes skylight glass. Module M1 includes:

[0031] Sub-module M101: Determine whether to perform electrochromic control on the skylight glass according to the solar altitude angle and a preset angle;

[0032] Or;

[0033] Sub-module M102: Determine whether to perform electrochromic control on the skylight glass according to the light spot formed by the incident sunlight irradiating the vehicle occupants inside the vehicle;

[0034] Or;

[0035] Sub-module M103: Determine whether it is necessary to perform electrochromic control on the skylight glass according to the second sunlight energy and a preset threshold.

[0036] Preferably, the control glass area includes front, rear, left, and right side glasses and front and rear windshield glasses. Each control glass area corresponds to a direction. Module M1 further includes:

[0037] Sub-module M104: Determine whether to perform electrochromic control on the glass in the corresponding direction according to the light spots formed by the incident sunlight irradiating the vehicle occupants inside the vehicle in each direction;

[0038] Or;

[0039] Sub-module M105: Determine whether to perform electrochromic control on the glass in the corresponding direction according to the third sunlight energy in each direction and a preset threshold.

[0040] Preferably, Module M2 includes:

[0041] Sub-module M201: Determine the energy limit value of the corresponding electrochromic glass according to the first sunlight energy;

[0042] Sub-module M202: Obtain the calculated transmittance of the electrochromic glass according to the energy limit value;

[0043] Sub-module M203: Determine the chromaticity of the corresponding electrochromic glass according to the calculated transmittance.

[0044] Preferably, Sub-module M203 includes:

[0045] Unit D2031: Obtain the actual transmittance according to the calculated transmittance and the minimum transmittance of the electrochromic glass;

[0046] Unit D2032: Determine the chromaticity of the variable-color glass according to the actual transmittance.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. The present invention selects the variable-color glass through the input solar altitude angle, the deviation angle between the solar incident direction and the vehicle head, abbreviated as the solar incident angle, and the actual solar intensity, and controls the variable-color glass according to the chromaticity of the variable-color glass. By utilizing the color-changing directivity of the variable-color glass of the whole vehicle, the shielding of sunlight is provided, and the human comfort is improved.

[0049] 2. The present invention controls the chromaticity / transmittance of the variable-color glass of the specified glass block / glass area, thereby reducing the solar intensity irradiated into the vehicle and the influence of direct sunlight on the driver's eyes, providing better comfort for the internal members and taking into account a good view.

[0050] 3. The present invention takes the actual glass chromaticity / transmittance as the input, accurately obtains the actual solar intensity and the spot position irradiated into the vehicle, so as to be used for sunlight compensation of the automatic air conditioner, etc., taking into account the human comfort and achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0052] Figure 1 is a flow schematic diagram of the present invention;

[0053] Figure 2 is a schematic diagram of the correspondence between the ambient temperature and the limit value of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0054] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0055] Figure 1 is a flow schematic diagram of the present invention. As Figure 1 shown, the present invention provides a method for controlling variable-color glass based on the calculation of solar input energy, including the following steps:

[0056] Step 1: Determine the control glass area that needs to be color-changed according to the preset determination method.

[0057] Among them, the controlled glass area includes the sunroof glass. Step 1 includes: Step 101: Determine whether to perform color change control on the sunroof glass according to the solar altitude angle and a preset angle; or; Step 102: Determine whether to perform color change control on the sunroof glass according to the light spot formed by the incident sunlight irradiating the vehicle occupants; or; Step 103: Determine whether it is necessary to perform color change control on the sunroof glass according to the second solar radiation energy and a preset threshold value.

[0058] Furthermore, the controlled glass area includes the front, rear, left, and right side glasses and the front and rear windshield glasses. Each controlled glass area corresponds to a direction. Step 1 further includes: Step 104: Determine whether to perform color change control on the glass in the corresponding direction according to the light spots formed by the incident sunlight irradiating the vehicle occupants in each direction; or; Step 105: Determine whether to perform color change control on the glass in the corresponding direction according to the third solar radiation energy in each direction and a preset threshold value.

[0059] Specifically, determine whether to select the sunroof glass for color change control. The preset determination methods include: Determination Method 1, Determination Method 2, and Determination Method 3.

[0060] Among them, Determination Method 1: Determine whether to perform color change control on the sunroof glass according to the solar altitude angle and a preset angle. The preset angle includes a first angle and a second angle. Specifically, determine the solar altitude angle. When the sun is lower than a certain angle, such as the first angle (A), the sunroof does not perform color change glass control. When the sun is higher than a certain angle, such as the second angle (B), the sunroof glass performs color change control. The original state should be maintained between angle A and angle B to form a hysteresis interval to avoid frequent switching of the glass chromaticity, or to ensure a time lag in the control switching. The second angle (B) can be determined in a manner that the solar altitude angle when the sun does not shine on the passengers is the appropriate angle. In the present invention, the A angle and the B angle can be calibrated on a real vehicle according to information such as the height, size of the vehicle roof, and the size and position of the sunroof.

[0061] Determination Method 2: According to the light spot formed by the incident sunlight irradiating the vehicle occupants, determine whether any occupant is irradiated by the incident sunlight from the sunroof. If no occupant is irradiated, no color change control is performed on the sunroof. If an occupant is irradiated, color change control is performed on the sunroof. The switching of the control should ensure a time lag in the control to avoid frequent switching.

[0062] Determination method 3: Determine whether color change control of the sunroof glass is required based on the second-day sunlight energy and a preset threshold. Calculate the horizontal light spot area (S1) and the vertical light spot area (S2) projected into the vehicle interior through the sunroof glass, and calculate the second-day sunlight energy (Q2) input from the sunroof based on the sunlight intensity. If the second-day sunlight energy exceeds the limit value (Q_lmt) corresponding to the ambient temperature (Tamb), the sunroof performs color change control. Among them, the preset threshold is the limit value (Q_lmt) corresponding to the ambient temperature (Tamb).

[0063] Specifically, the second-day sunlight energy can be obtained through the following steps.

[0064] Step S1: Obtain the sunlight intensity (R1) in the horizontal direction and the sunlight intensity (R2) in the vertical direction of the sunroof; Step S2: Based on R1 and R2, obtain the second-day sunlight energy (Q2), Q2 = (S1 * R2 + S2 * R1) * R, where R represents the current chromaticity transmittance of the glass; Step S3: Figure 2 is a schematic diagram of the correspondence between the ambient temperature and the limit value of the present invention, as Figure 2 shown, the horizontal axis is the ambient temperature (Tamb), the unit is degree Celsius (°C), the vertical axis is the outside temperature, the unit is °C, the dotted line represents the input power of the front, rear, left, and right side glasses, the unit is watt (W), the dashed line represents the input power of the rear windshield, and the solid line represents the input power of the sunroof glass; through Figure 2 , obtain Q_lmt corresponding to Tamb, Figure 2 which needs to be calibrated according to comfort on an actual vehicle; Step S4: If Q2 > Q_lmt, after waiting for a certain delay, perform color change control of the sunroof glass, where the length of the delay can be calibrated on an actual vehicle according to comfort; Step S5: If Q2 < Q_lmt, do not perform color change control of the sunroof glass. In the present invention, there can be an "or" relationship among determination method 1, determination method 2, and determination method 3. That is, as long as one condition satisfies the sunroof color change, the sunroof color change is controlled.

[0065] Furthermore, according to a preset determination method, determine whether to perform color change control of the front, rear, left, and right side glasses and the front and rear windshield of the vehicle. The preset determination method further includes: determination method 4 and determination method 5.

[0066] Determination method 4: Based on the light spots formed by the incident sunlight from each direction irradiating the vehicle occupants, determine whether any occupant is irradiated by the incident sunlight from the glass in each direction. If no occupant is irradiated, do not perform sunroof color change control. If an occupant is irradiated, perform sunroof color change control. The switching of the control should ensure a time lag in the control time to avoid frequent switching.

[0067] Determination method 5: The determination method is the same as that of the sunroof glass determination method 3. By calculating the first-day sunlight energy Q1 and looking upFigure 2 Derive Q_lmt for determination.

[0068] In the present invention, there may be an "OR" relationship between determination method 4 and determination method 5. That is, as long as one condition is met for a certain piece of glass to change color, the color change of the glass is controlled.

[0069] Step 2: Obtain the chromaticity of the electrochromic glass in the control glass area according to the first solar irradiation energy input from the sunlight into the control glass area.

[0070] Among them, step 2 includes: step 201: Determine the energy limit value of the corresponding electrochromic glass according to the first solar irradiation energy; step 202: Obtain the calculated transmittance of the electrochromic glass according to the energy limit value; step 203: Determine the chromaticity of the corresponding electrochromic glass according to the calculated transmittance.

[0071] Specifically, step 203 includes: step 2031: Obtain the actual transmittance according to the calculated transmittance and the minimum transmittance of the electrochromic glass; step 2032: Determine the chromaticity of the electrochromic glass according to the actual transmittance.

[0072] In an optional implementation manner, by calculating the first solar irradiation energy (Qsd) input from the sunlight into each piece of electrochromic glass, the calculation method of the first solar irradiation energy is the same as that of the second solar irradiation energy in determination method 3 of the skylight glass; by Figure 2 Calculating the total energy limit value Qsd_lmt of the corresponding glass for Tamb; calculating the calculated transmittance R' after the glass changes color, R' = R - (Qsd - Qsd_lmt) / (Ssd1*R2 + Ssd2*R1), where Ssd1 represents the horizontal light spot area projected by the sunlight glass inside the vehicle, Ssd2 represents the vertical light spot area projected by the sunlight glass inside the vehicle, and R represents the standard transmittance when the electrochromic glass does not change color; calculating the actual transmittance (R_act) of the actual output according to the chromaticity corresponding to the minimum transmittance (R_min) of the electrochromic glass, R_act = Max(R', R_min); obtaining the chromaticity corresponding to R_act by looking up the mapping table and outputting it to the control unit to complete chromaticity control. The mapping table needs to be provided by the electrochromic glass supplier.

[0073] Step 3: Perform chromaticity control on the electrochromic glass according to the chromaticity.

[0074] Furthermore, in the present invention, the actual solar irradiation energy inside the vehicle can also be calculated according to the chromaticity of the glass, including the following steps:

[0075] Step P1: Repeat the process from Step 1 to Step 3 to complete the chromaticity output of all the selected variable - color glasses; Step P2: Use the glass transmittance R_act corresponding to the actually output glass chromaticity to calculate the actual sunlight energy Q_act transmitted through the selected variable - color glass, Q_act=(S11*R21 + S21*R11)*R_act, where S11 represents the horizontal spot area of sunlight projected onto the vehicle interior through the glass, S21 represents the vertical spot area of sunlight projected onto the vehicle interior through the glass, R11 represents the sunlight intensity in the horizontal direction, and R21 represents the sunlight intensity in the vertical direction; Step P3: Obtain the total sunlight energy (∑Q) actually transmitted through all the variable - color glasses; Step P4: Use the same method to calculate the sunlight exposure (∑Q_ns) of the non - selected variable - color glasses and non - variable - color glasses; Step P5: Add ∑Q and ∑Q_ns to obtain the actual input energy of the vehicle's sunlight, and output it to the air - conditioning control unit to achieve a certain compensation only for this part of the energy, thereby achieving the purpose of partial energy conservation.

[0076] The present invention also provides a variable - color glass control system based on sunlight input energy calculation, including the following modules:

[0077] Module M1: Determine the control glass area that needs to be subjected to color - change control according to a preset determination system.

[0078] Among them, the control glass area includes the sunroof glass. Module M1 includes: Sub - module M101: Determine whether to perform color - change control on the sunroof glass according to the solar altitude angle and a preset angle; or; Sub - module M102: Determine whether to perform color - change control on the sunroof glass according to the spot formed by the incident sunlight irradiating the vehicle occupants; or; Sub - module M103: Determine whether it is necessary to perform color - change control on the sunroof glass according to the second sunlight energy and a preset threshold.

[0079] Further, the control glass area includes the front, rear, left, and right side glasses and the front and rear windshield glasses. Each control glass area corresponds to a direction. Module M1 further includes: Sub - module M104: Determine whether to perform color - change control on the glass in the corresponding direction according to the spots formed by the incident sunlight irradiating the vehicle occupants in each direction; or; Sub - module M105: Determine whether to perform color - change control on the glass in the corresponding direction according to the third sunlight energy in each direction and a preset threshold.

[0080] Module M2: Obtain the chromaticity of the variable - color glass in the control glass area according to the first sunlight energy input from the control glass area.

[0081] Among them, module M2 includes: submodule M201: determining the energy limit of the corresponding photochromic glass according to the first sunlight energy; submodule M202: obtaining the calculated transmittance of the photochromic glass according to the energy limit; submodule M203: determining the chromaticity of the corresponding photochromic glass according to the calculated transmittance.

[0082] Specifically, the submodule M203 includes: a unit D2031: obtaining the actual transmittance according to the calculated transmittance and the minimum transmittance of the photochromic glass; and a unit D2032: determining the chromaticity of the photochromic glass according to the actual transmittance.

[0083] Module M3: Control the chromaticity of the photochromic glass according to the chromaticity.

[0084] The working principle of the present invention is:

[0085] The present invention needs to obtain sunlight sensors, GPS, driving direction and other signals from the vehicle as input signals, integrate them into the air conditioning controller or the thermal management domain controller, and finally output them to the glass color-changing actuator to realize the glass color-changing function. Then, it can also be output to the air conditioning actuator, such as the damper, compressor, etc., to compensate for a certain amount of sunlight.

[0086] The present invention specifies the glass block to be changed color, or specifies the glass area to be changed color based on signals such as the sunlight altitude angle, the sunlight incident direction and the deviation angle of the front of the vehicle. The glass blocks can be divided into the front windshield, the rear window, the four side window glasses on the left and right sides and the front and back sides and the skylight glass. The area of a certain glass can also be specified, such as specifying the upper edge of the front windshield to change color. Specifying the front windshield area to change color replaces the function of the sun visor, prevents sunlight from directly entering the driver's eyes and takes into account the maximum field of vision, thereby improving driving safety. Based on the intensity of the sunlight spot, the degree of color change is controlled to take into account both comfort and light transmittance. Based on the chromaticity of the current color-changing glass, the actual sunlight energy entering the car is calculated.

[0087] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0088] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A method for controlling a color-changing glass based on the calculation of sunlight input energy, characterized in that, Including: Step 1: Determine the control glass area that needs color change control according to a preset determination method; Step 2: Obtain the chromaticity of the electrochromic glass in the control glass area based on the first sunlight energy input from the control glass area; Step 3: Perform chromaticity control of the electrochromic glass according to the chromaticity; The said Step 2 includes: Step 201: Determine the energy limit value of the corresponding electrochromic glass according to the first sunlight energy; Step 202: Obtain the calculated transmittance of the electrochromic glass according to the energy limit value; Step 203: Determine the chromaticity of the corresponding electrochromic glass according to the calculated transmittance.

2. The method for controlling a color-changing glass based on the calculation of sunlight input energy according to claim 1, wherein, The control glass area includes skylight glass, and the said Step 1 includes: Step 101: Determine whether to perform color change control on the skylight glass according to the sun altitude angle and a preset angle; Or; Step 102: Determine whether to perform color change control on the skylight glass according to the light spot formed by the incident sunlight irradiating the vehicle occupants; Or; Step 103: Determine whether it is necessary to perform color change control on the skylight glass according to the second sunlight energy and a preset threshold value.

3. The method for controlling a color-changing glass based on the calculation of sunlight input energy according to claim 1, wherein, The control glass area includes front, rear, left, and right side glasses and front and rear windshield glasses, and each control glass area corresponds to a direction. The said Step 1 further includes: Step 104: Determine whether to perform color change control on the glass in the corresponding direction according to the light spots formed by the incident sunlight irradiating the vehicle occupants in each direction; Or; Step 105: Determine whether to perform color change control on the glass in the corresponding direction according to the third sunlight energy in each direction and a preset threshold value.

4. The color-changing glass control method based on sunlight input energy calculation according to claim 1, characterized in that, The said Step 203 includes: Step 2031: Obtain the actual transmittance according to the calculated transmittance and the minimum transmittance of the electrochromic glass; Step 2032: Determine the chromaticity of the electrochromic glass according to the actual transmittance.

5. A discoloring glass control system based on sunlight input energy calculation, characterized in that, Including: Module M1: Determine the control glass area that needs color change control according to a preset determination system; Module M2: Obtain the chromaticity of the electrochromic glass in the control glass area based on the first sunlight energy input from the control glass area; Module M3: Perform chromaticity control of the electrochromic glass according to the chromaticity; The said Module M2 includes: Sub-module M201: Determine the energy limit value of the corresponding electrochromic glass according to the first sunlight energy; Sub-module M202: Obtain the calculated transmittance of the electrochromic glass according to the energy limit value; Sub-module M203: Determine the chromaticity of the corresponding electrochromic glass according to the calculated transmittance.

6. The color-changing glass control system based on sunlight input energy calculation according to claim 5, characterized in that The control glass area includes skylight glass, and the said Module M1 includes: Sub-module M101: Determine whether to perform color change control on the skylight glass according to the sun altitude angle and a preset angle; Or; Sub-module M102: Determine whether to perform color change control on the skylight glass according to the light spot formed by the incident sunlight irradiating the vehicle occupants; Or; Sub-module M103: Determine whether it is necessary to perform color change control on the skylight glass according to the second sunlight energy and a preset threshold value.

7. The color-changing glass control system based on sunlight input energy calculation according to claim 5, wherein The control glass area includes front, rear, left, and right side glasses and front and rear windshield glasses, and each control glass area corresponds to a direction. The said Module M1 further includes: Sub-module M104: Determine whether to perform color change control on the glass in the corresponding direction according to the light spots formed by the incident sunlight irradiating the vehicle occupants from various directions; Or; Sub-module M105: Determine whether to perform color change control on the glass in the corresponding direction according to the third sunlight energy in each direction and a preset threshold.

8. The color-changing glass control system based on sunlight input energy calculation according to claim 5, wherein The sub-module M203 includes: Unit D2031: Obtain the actual transmittance according to the calculated transmittance and the minimum transmittance of the color-changing glass; Unit D2032: Determine the chromaticity of the color-changing glass according to the actual transmittance.

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