Self-adaptive energy-saving automobile head lamp and control system and method thereof

Abstract

The invention relates to the technical field of automobiles, in particular to a self-adaptive energy-saving automobile head lamp and a control system and method.The self-adaptive energy-saving automobile head lamp comprises a base, an angle adjusting mechanism is installed on one side of the base, a lamp mounting plate is installed on the angle adjusting mechanism, an LED lamp is installed on the lamp mounting plate, the LED lamp is sleeved with a lampshade, and the lampshade is arranged on the base. One end of the lampshade is detachably connected with the base through a locking mechanism, and the other side of the base is detachably provided with a control module capable of adjusting brightness in a self-adaptive mode. According to the self-adaptive energy-saving automobile head lamp, through cooperation of the control module, the angle adjusting mechanism and the LED lamp, the brightness of the LED lamp and work of the angle adjusting mechanism can be controlled through the control module according to the road condition and obstacle information in front of an automobile; the brightness of the LED lamp can be adjusted in a self-adaptive mode, the illumination angle of the LED lamp can be adjusted in a self-adaptive mode according to the turning requirement, and the using convenience of the automobile head lamp is improved.

Description

Technical Field

[0001] The invention belongs to the field of automobile technology, and in particular relates to an adaptive energy-saving automobile headlight and a control system and method thereof. Background Art

[0002] Energy-saving automobile headlights, especially LED (light-emitting diode) headlights, have become an important part of modern automobile lighting systems. Currently, energy-saving automobile headlights on the market include major components such as bulbs (light source), reflectors, light distribution mirrors, lampshades, cooling systems and electronic control units;

[0003] For example, the patent application number is 201510947019.1, which discloses an LED car headlight, including: a temperature averaging plate, an LED-COB light source, a metal cover of a bulb, a fin heat sink and a fan; the temperature averaging plate is a flat plate structure in the shape of a letter "I", in which a vacuum evaporation chamber and a condensation chamber are arranged, and a capillary core layer is arranged; the LED-COB light source is attached to the outer surface of the evaporation chamber, at least two fin heat sinks are attached to the two side surfaces of the condensation chamber respectively, and the fan is arranged at the rear end of the fin heat sink; the metal cover of the bulb is made of magnesium alloy material; except for the fan and the base shell, the remaining parts are connected by high-temperature welding of tin-silver-copper environmentally friendly solder paste. The LED car headlight integrates four heat dissipation technical means: phase change heat dissipation, metal heat sink heat conduction heat dissipation, air cooling heat dissipation and radiation heat dissipation, with high heat dissipation efficiency; good shockproof effect, firm structure; easy installation, precise focusing, can perfectly replace the original bulb, and is suitable for various models.

[0004] However, in order to improve the lighting effect of driving light, the light source needs to be refocused. However, since it includes multiple components such as a temperature homogenizer, an LED-COB light source, a fin heat sink, and a fan, the connection and layout between these components need to be precisely designed, which increases the complexity and difficulty of adjustment, making it inconvenient to adaptively adjust the car headlights. Therefore, we need to propose an adaptive energy-saving car headlight and its control system and method to solve the above-mentioned problems, so that it can facilitate the adaptive adjustment of the car headlights and improve the convenience of use. Summary of the invention

[0005] In view of the above problems, the present invention provides an adaptive energy-saving automobile headlight, comprising a base, one side of which is installed with an angle adjustment mechanism, the angle adjustment mechanism is installed with a lamp mounting plate, the lamp mounting plate is installed with an LED lamp, the outer portion of the LED lamp is sleeved with a lampshade, one end of the lampshade is detachably connected to the base through a locking mechanism, a control module with adaptive brightness adjustment is detachably installed on the other side of the base, and a mounting groove for installing the control module is provided on the other side of the base, a cover plate is detachably installed at the notch of the mounting groove, the cover plate is in conflict with the control module, and the control module is electrically connected to the lamp mounting plate and the angle adjustment mechanism.

[0006] Furthermore, the locking mechanism includes an insertion rod fixed at one end of the lampshade and an elastic locking rod slidably mounted on the side wall of the base. A socket for inserting one end of the insertion rod is provided on one side of the base, and a locking hole for locking the locking rod is provided on the insertion rod.

[0007] Furthermore, the locking rod includes a T-shaped rod and a limit block fixed at one end of the T-shaped rod. When the insertion rod is inserted into the insertion hole, the limit block is located inside the locking hole. A return spring is sleeved on the outer wall of the T-shaped rod near one end of the limit block. The side wall of the base is provided with a sliding hole for installing the return spring and slidingly installing the T-shaped rod.

[0008] Furthermore, the angle adjustment mechanism includes a motor and a transmission mechanism connected to the motor, the motor is fixed to one side of the base through a fixing plate, two support plates are fixed to one side of the fixing plate, the transmission mechanism is installed on the two support plates, and two connecting plates are fixed to the other side of the lamp mounting plate, and both ends of the transmission mechanism are respectively connected to the two connecting plates.

[0009] Furthermore, the control module includes a sensor group, a controller and a dimming circuit, the controller is electrically connected to the motor, the sensor group and the dimming circuit respectively, the sensor group includes a light sensor for detecting the intensity of ambient light, a distance sensor for detecting the distance between the vehicle and an obstacle or other vehicle ahead, and a camera for identifying a curve ahead; the dimming circuit adjusts the LED lamp driving current according to the signal of the controller, thereby achieving adjustment of the LED lamp illumination intensity.

[0010] Furthermore, the dimming circuit includes a power supply, an MCU, a PWM signal generator, a driving circuit, a current sensor and a temperature sensor, the current sensor, the temperature sensor, the PWM signal generator and the power supply are all electrically connected to the MCU, and the PWM signal generator is electrically connected to the driving circuit, wherein the MCU is a single-chip microcomputer with digital signal processing capabilities.

[0011] Based on the adaptive energy-saving automobile headlight described above, the present invention further provides a control system for an adaptive energy-saving automobile headlight, comprising a sensor group, a controller, a dimming circuit and an angle adjustment mechanism, wherein the controller is electrically connected to the sensor group, the dimming circuit and the angle adjustment mechanism respectively, the sensor group is used to collect various information about the surrounding environment of the vehicle, the controller receives the data transmitted by the sensor group and analyzes and processes it, and sends control instructions to the dimming circuit and the angle adjustment mechanism according to preset rules and algorithms to achieve adaptive adjustment of the headlight; the dimming circuit adjusts the driving current of the LED lamp according to the instructions sent by the controller, thereby controlling the illumination intensity of the LED lamp; the angle adjustment mechanism drives the transmission mechanism according to the instructions of the controller, so that the transmission mechanism drives the LED lamp to rotate to adjust the illumination angle of the light.

[0012] Furthermore, the controller analyzes and processes the received sensor group data as follows:

[0013] A1. Set the light intensity threshold L according to the daytime and nighttime lighting environment th , and then according to the light intensity data from the light sensor and the light intensity threshold L th Compare and judge the current ambient light conditions. When the light intensity data is less than the light intensity threshold L th When the light intensity data is greater than the light intensity threshold L th When , it is judged as a high-light environment;

[0014] A2. Combining the ambient light intensity and vehicle speed information, the LED light intensity is adjusted and determined, and the LED light brightness is adjusted according to the determination result;

[0015] The steps for adjusting the brightness of LED lights are as follows:

[0016] A21. Calculate the initial brightness adjustment value based on the actual intensity of the ambient light. The calculation formula is as follows:

[0017] L0=(|L p -L th |)*k1, where L p is the actual light intensity, L th is the light intensity threshold, L0 is the preliminary brightness adjustment value, and k1 is the basic brightness adjustment coefficient;

[0018] A22. Calculate the final brightness adjustment value based on the vehicle speed and the preliminary brightness adjustment value. The calculation formula is as follows:

[0019] L=L0+k2*(|VV th |), where L is the final brightness adjustment value, V is the actual speed of the vehicle, in km / h, V this the speed limit of road vehicles, L0 is the initial brightness adjustment value, and k2 is the vehicle speed brightness adjustment coefficient;

[0020] A23. Use the adjustment formula to adjust the value of k3 according to the external factors of vehicle load and weather conditions to adjust the brightness. The adjustment formula is as follows:

[0021] L'=L*(1+k3), where L' is the brightness of the light after adjustment, L is the final brightness adjustment value, k3 is the influence coefficient, and when k3 is a positive value, the brightness is increased, and when k3 is a negative value, the brightness is decreased;

[0022] A3. Based on the image data transmitted by the camera, the image recognition algorithm is used to identify whether there is a curve or obstacle ahead, and the LED light angle is adjusted according to the curve or obstacle situation.

[0023] Furthermore, in step A3, the steps of adjusting the LED light angle are as follows:

[0024] A31, the camera captures the road image in front of the vehicle in real time and transmits the image data to the controller;

[0025] A32. The controller uses the image recognition algorithm to process and analyze the image to identify whether there is a curve or obstacle ahead. The following situations exist:

[0026] A321. When a curve is identified, the radius of the curve needs to be further calculated, and then the light irradiation angle of the LED lamp that needs to be adjusted is calculated based on the vehicle's driving speed V and the curve radius R. The calculation formula is as follows:

[0027] In the formula, g is the acceleration due to gravity, R is the radius of the curve, V is the vehicle speed, and θ wan is the angle of the curved light of the LED lamp;

[0028] A322. When an obstacle is identified, the distance sensor senses the position and distance of the obstacle, and determines whether the light irradiation angle needs to be reduced to avoid dazzling the driver of the vehicle ahead. The determination method of whether the light irradiation angle needs to be reduced is as follows: when the obstacle distance is less than the set safety distance, the LED light irradiation angle needs to be reduced by a linear adjustment formula, and the linear adjustment formula is as follows:

[0029] θ new =θ wan -k4*(|d th -d|), where θ new is the adjusted light irradiation angle, θ wan is the angle of the LED light, k4 is the coefficient of the control angle reduction, d this the safety distance value set between the vehicle and the obstacle, and d is the actual distance between the vehicle and the obstacle;

[0030] When the obstacle distance is greater than or equal to the set safety distance, there is no need to reduce the LED light irradiation angle, and the process returns to step A31;

[0031] A33. Calculate the final angle adjustment value θ' of the LED light angle according to the calculated curve angle adjustment value and obstacle angle adjustment value. The calculation formula is: θ'=θ wan +θ new ;

[0032] A34. The controller sends a control signal to the angle adjustment mechanism according to the final angle adjustment value θ', driving the LED lamp to rotate to the corresponding angle.

[0033] Based on the above-described adaptive energy-saving automobile headlight, the present invention also provides a control method for the adaptive energy-saving automobile headlight, comprising the following steps:

[0034] S1. According to different environments and driving requirements, the light intensity threshold for distinguishing between daytime and nighttime lighting environments and the vehicle speed threshold for brightness and angle adjustment are pre-set, and the correlation coefficients of brightness adjustment and angle adjustment are initialized;

[0035] S2, collects the ambient light intensity data, the distance between the vehicle and the obstacle, and the radius signal of the curve ahead in real time through the sensor group, and transmits the collected data to the control module;

[0036] S3, the control module analyzes and processes the collected data, and adjusts the brightness and angle according to the analysis results;

[0037] S4: Continuously collect sensor group data in real time, and repeat the brightness adjustment and angle adjustment steps in S3 to adapt to the changing driving environment.

[0038] The beneficial effects of the present invention are:

[0039] 1. The adaptive energy-saving automobile headlight proposed in the present invention can control the brightness of the LED lamp and the operation of the angle adjustment mechanism according to the road conditions and obstacle information in front of the vehicle through the control module, by cooperating with the angle adjustment mechanism and the LED lamp, so that the LED lamp can adaptively adjust the brightness and the LED light angle according to the turning requirements, thereby improving the convenience of using the automobile headlight.

[0040] 2. The control system of the adaptive energy-saving automobile headlights provided by the present invention can automatically sense changes in the external environment, such as ambient light intensity, road conditions, and vehicle speed, through the cooperation of a sensor group, a controller, a dimming circuit, and an angle adjustment mechanism, and automatically adjust the brightness and light irradiation angle of the headlights according to changes in the external environment without the need for manual operation by the driver, thereby improving driving convenience and comfort.

[0041] 3. The control method of the adaptive energy-saving automobile headlights provided by the present invention can collect sensor data in real time, and continuously repeat the steps of brightness and angle adjustment according to environmental changes. This enables the headlights to adapt to the changing driving environment in real time, such as sudden changes in light, changes in road conditions, etc., always maintain the best lighting state, and provide stable and reliable lighting support for the driver.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A schematic structural diagram of a vehicle headlight according to an embodiment of the present invention is shown;

[0045] Figure 2 A schematic cross-sectional structure diagram of a vehicle headlight according to an embodiment of the present invention is shown;

[0046] Figure 3 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at A in the middle;

[0047] Figure 4 A schematic diagram of the exploded structure of a vehicle headlight according to an embodiment of the present invention is shown;

[0048] Figure 5 A schematic structural diagram of a vehicle headlight transmission mechanism according to an embodiment of the present invention is shown;

[0049] Figure 6 A system block diagram of a control system for a vehicle headlight according to an embodiment of the present invention is shown;

[0050] Figure 7 A flowchart of analyzing and processing received sensor group data by a controller according to an embodiment of the present invention is shown;

[0051] Figure 8 A flowchart of a method for controlling a vehicle headlight according to an embodiment of the present invention is shown.

[0052] In the figure: 1. lampshade; 2. base; 3. locking mechanism; 31. plug rod; 32. T-bar; 33. reset spring; 34. limit block; 4. LED lamp; 5. cover plate; 6. control module; 7. lamp mounting plate; 8. mounting slot; 9. reinforcement bolt; 10. angle adjustment mechanism; 101. fixing plate; 102. support plate; 103. connecting plate; 104. rotating shaft; 105. motor; 106. first bevel gear; 107. second bevel gear. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The embodiment of the present invention provides an adaptive energy-saving automobile headlight, such as Figure 1-5 As shown, it includes a base 2, one side of which is installed with an angle adjustment mechanism 10, a lamp mounting plate 7 is installed on the angle adjustment mechanism 10, an LED lamp 4 is installed on the lamp mounting plate 7, a lamp cover 1 is sleeved on the outside of the LED lamp 4, one end of the lamp cover 1 is detachably connected to the base 2 through a locking mechanism 3, a control module 6 with adaptive brightness adjustment is detachably installed on the other side of the base 2, and a mounting groove 8 for installing the control module 6 is opened on the other side of the base 2, a cover plate 5 is detachably installed at the notch of the mounting groove 8, the cover plate 5 is in conflict with the control module 6, the control module 6 is electrically connected to the lamp mounting plate 7 and the angle adjustment mechanism 10, the control module 6 is protected by the cover plate 5, the brightness of the LED lamp 4 and the operation of the angle adjustment mechanism 10 are controlled by the control module 6, so that the LED lamp 4 can adaptively adjust the brightness and can adaptively adjust the illumination angle of the LED lamp 4 according to turning requirements, thereby improving the convenience of using the car headlights.

[0055] There are multiple locking mechanisms 3, and the multiple locking mechanisms 3 are installed at equal angles on the periphery of the base 2. By setting up multiple locking mechanisms 3, the connection firmness between the lampshade 1 and the base 2 can be improved, and the lampshade 1 can be prevented from shaking.

[0056] The locking mechanism 3 includes an insertion rod 31 fixed to one end of the lampshade 1 and a locking rod slidably mounted on the side wall of the base 2 and having elasticity. A socket for inserting one end of the insertion rod 31 is provided on one side of the base 2, and a locking hole for locking the locking rod is provided on the insertion rod 31. When the lampshade 1 is installed, the insertion rod 31 is inserted into the inside of the socket. During the insertion process, the locking rod is squeezed by the locking rod to put the locking rod in a compressed state. After the insertion rod 31 is inserted into the socket, one end of the locking rod is automatically inserted into the inside of the locking hole by using the elasticity of the locking rod, so that the insertion rod 31 is locked inside the base 2, thereby improving the firmness of the connection between the insertion rod 31 and the base 2.

[0057] The locking rod includes a T-shaped rod 32 and a limit block 34 fixed at one end of the T-shaped rod 32. When the insertion rod 31 is inserted into the insertion hole, the limit block 34 is located inside the locking hole. The outer wall of the T-shaped rod 32 near one end of the limit block 34 is sleeved with a return spring 33. The side wall of the base 2 is provided with a sliding hole for installing the return spring 33 and sliding the T-shaped rod 32, so that the T-shaped rod 32 can slide in the sliding hole. At the same time, the movement of the T-shaped rod 32 drives the limit block 34 to move in or out of the locking hole. When the limit block 34 moves out of the locking hole, the limit block 34 is used to compress the return spring 33. When the limit block 34 is aligned with the locking hole, the resilience of the return spring 33 is used to drive the limit block 34 to enter the interior of the locking hole, so as to automatically lock the moving position of the limit block 34.

[0058] The cover plate 5 is fixed to the base 2 by reinforcing bolts 9. A plurality of screw holes for installing the reinforcing bolts 9 are provided around the cover plate 5. The cover plate 5 can be detached by removing the reinforcing bolts 9, so that the cover plate 5 can be removed for maintenance and installation of the control module 6.

[0059] like Figure 2 and Figure 5 As shown, the angle adjustment mechanism 10 includes a motor 105 and a transmission mechanism connected to the motor 105, the motor 105 is fixed to one side of the base 2 through a fixing plate 101, two support plates 102 are fixed to one side of the fixing plate 101, the transmission mechanism is installed on the two support plates 102, and two connecting plates 103 are fixed to the other side of the lamp mounting plate 7, the two ends of the transmission mechanism are respectively connected to the two connecting plates 103, and the transmission mechanism is driven by the motor 105 to drive the lamp mounting plate 7 to rotate left and right, so as to adjust the lighting direction of the LED lamp 4 according to the turning requirements of the car.

[0060] The transmission mechanism includes a rotating shaft 104, a first bevel gear 106 sleeved and fixed on the rotating outer wall, and a second bevel gear 107 installed on the output shaft of the motor 105. The first bevel gear 106 is meshed with the second bevel gear 107. The two ends of the rotating shaft 104 are respectively fixed through the support plate 102 and the connecting plate 103, and the rotating shaft 104 is rotatably connected to the support plate 102 through a bearing, so that the motor 105 drives the rotating shaft 104 to rotate through the meshing of the first bevel gear 106 and the second bevel gear 107, and then uses the rotating shaft 104 to drive the lamp fixing plate 101 to rotate around the rotating shaft 104 as the axis, thereby adjusting the lighting direction of the LED lamp 4.

[0061] The angle adjustment mechanism 10 can accurately adjust the illumination angle of the headlights according to parameters such as the curve radius and vehicle speed, so that the light always maintains the best match with the vehicle's driving direction, improves the lighting effect of the vehicle when driving on curves, enhances the vehicle's handling performance and driving stability, and provides the driver with a better driving experience.

[0062] The control module 6 includes a sensor group, a controller and a dimming circuit. The controller is electrically connected to the motor 105, the sensor group and the dimming circuit respectively. The sensor group includes a light sensor for detecting the intensity of ambient light, a distance sensor for detecting the distance between the vehicle and an obstacle or other vehicle ahead, and a camera for identifying a curve ahead. The dimming circuit adjusts the driving current of the LED lamp 4 according to the signal of the controller, thereby realizing the adjustment of the light intensity of the LED lamp 4.

[0063] When the control module 6 performs adaptive brightness adjustment, it monitors the ambient light intensity in real time through the light sensor. When the light intensity is low, the controller increases the driving current of the LED lamp 4 according to the sensor data to improve the light brightness; when the light intensity is high, the driving current is reduced and the light is dimmed. At the same time, combined with the vehicle's speed information, the light brightness is appropriately increased when driving at high speed to ensure sufficient field of view; the brightness is reduced when driving at low speed to save energy.

[0064] When the control module 6 performs the adaptive angle adjustment, it obtains the road condition and obstacle information in front of the vehicle through the distance sensor and the camera. When the vehicle turns or there is a curve in front, the controller calculates the light angle that needs to be adjusted according to the road condition and obstacle information in front of the vehicle, and then drives the LED light 4 to rotate through the motor 105 and the transmission mechanism, so that the light can illuminate the curve or the area where the obstacle is located in advance. When the vehicle approaches the vehicle or obstacle in front, the light irradiation angle is automatically reduced to avoid dazzling the driver of the vehicle in front. The calculation formula of the light irradiation angle of the LED light is:

[0065] In the formula, g is the acceleration due to gravity, R is the radius of the curve, V is the vehicle speed, and θ is the light irradiation angle of the LED lamp.

[0066] The dimming circuit includes a power supply, an MCU, a PWM signal generator, a driving circuit, a current sensor and a temperature sensor. The current sensor, the temperature sensor, the PWM signal generator and the power supply are all electrically connected to the MCU, and the PWM signal generator is electrically connected to the driving circuit. The MCU is a single-chip microcomputer with digital signal processing capabilities. It receives signals from sensors and other modules, analyzes and processes them, and outputs control signals to adjust the brightness of the light according to preset algorithms and logics; the PWM signal generator is implemented by a dedicated PWM chip or by utilizing the PWM output pin of the MCU, and can generate a pulse width modulation signal to control the brightness of the LED lamp 4 by changing the duty cycle of the pulse; the driving circuit is composed of power transistors (such as MOSFET), which are used to amplify the power of the PWM signal to provide sufficient current to drive the LED lamp 4, and can convert the weak control signal output by the MCU into a strong current signal that can drive the LED.

[0067] When the car is started, the MCU starts to work, initializes the internal registers and PWM signal generator, sets the default light brightness value and related parameters, and receives the light intensity data from the light sensor, the vehicle speed information from the vehicle speed sensor, and the signals from the temperature sensor and the current sensor. The MCU compares the received light intensity data with the preset light intensity threshold value to determine whether the current environment is a high light or low light environment. At the same time, combined with the vehicle speed information, the light brightness value suitable for the current environment is calculated according to a specific algorithm; then according to the calculated brightness value, the MCU controls the PWM signal generator to generate a PWM signal with a corresponding duty cycle. The higher the brightness value, the greater the duty cycle of the PWM signal, and vice versa. After the PWM signal is amplified by the driving circuit, the LED lamp 4 is driven to work, and the conduction time of the LED lamp 4 is adjusted by changing the duty cycle of the PWM signal, thereby realizing the adjustment of the light brightness; the working current and temperature of the LED lamp 4 are monitored in real time by the current sensor and the temperature sensor, and the relevant signals are fed back to the MCU. The MCU fine-tunes the duty cycle of the PWM signal according to the feedback signal to ensure that the LED lamp 4 works in a stable and safe state and maintains a suitable brightness.

[0068] Through the cooperation of the control module 6 with the angle adjustment mechanism 10 and the LED lamp 4, the light sensor in the control module 6 monitors the external ambient light intensity in real time. When it is detected that the ambient light intensity is low, such as at night, in tunnels or underground parking lots, the light sensor will transmit this information to the controller. After receiving the data, the controller will issue instructions to the dimming circuit according to the preset program and algorithm to increase the driving current of the LED lamp 4, thereby improving the brightness of the light to ensure that the driver has enough field of view to see the road conditions clearly. On the contrary, when the ambient light intensity is high, such as when there is plenty of sunlight during the day, the signal fed back to the controller by the light sensor will cause the controller to command the dimming circuit to reduce the driving current of the LED lamp 4, thereby dimming the light to achieve the purpose of energy saving. The distance sensor and camera in the control module 6 work together to obtain the road condition and obstacle information in front of the vehicle. The distance sensor can accurately measure the distance between the vehicle and the obstacle or other vehicles in front, while the camera can identify the curves, traffic signs and pedestrians in front. The sensor group transmits the collected data to the controller in real time. When the vehicle turns or there is a curve in front, the controller will calculate the light angle that needs to be adjusted based on the received road condition and obstacle information. Then, the controller sends a control signal to the motor 105, and the motor 105 starts working and drives the lamp mounting plate 7 to rotate through the transmission mechanism, so that the lighting direction of the LED lamp 4 is adjusted, so that the light can illuminate the curve or obstacle area in advance, thereby improving driving safety.

[0069] Based on the above-described adaptive energy-saving automobile headlight, the present invention also provides a control system for an adaptive energy-saving automobile headlight, such as Figure 6 As shown, it includes a sensor group, a controller, a dimming circuit and an angle adjustment mechanism. The controller is electrically connected to the sensor group, the dimming circuit and the angle adjustment mechanism respectively. The sensor group is used to collect various information about the vehicle's surrounding environment. The controller receives the data transmitted by the sensor group and analyzes and processes it, and sends control instructions to the dimming circuit and the angle adjustment mechanism according to preset rules and algorithms to achieve adaptive adjustment of the headlights; the dimming circuit adjusts the driving current of the LED lamp 4 according to the instructions sent by the controller, thereby controlling the light intensity of the LED lamp 4; the angle adjustment mechanism 10 drives the transmission mechanism according to the instructions of the controller, so that the transmission mechanism drives the LED lamp 4 to rotate to adjust the illumination angle of the light.

[0070] The sensor group consists of a light sensor, a distance sensor, a camera and a vehicle speed sensor. The light sensor provides ambient light intensity data, the distance sensor provides distance data between the vehicle and the object in front, the camera provides front road images and curve recognition data, and the vehicle speed sensor provides vehicle current speed data.

[0071] like Figure 7As shown, the process of the controller analyzing and processing the received sensor group data is as follows:

[0072] A1. Set the light intensity threshold L according to the daytime and nighttime lighting environment th , and then according to the light intensity data from the light sensor and the light intensity threshold L th Compare and judge the current ambient light conditions. When the light intensity data is less than the light intensity threshold L th When the light intensity data is greater than the light intensity threshold L th When , it is judged as a high-light environment;

[0073] A2. Combining the ambient light intensity and vehicle speed information, the LED lamp 4 light intensity adjustment is determined, and the LED lamp 4 light brightness is adjusted according to the determination result;

[0074] The steps for adjusting the brightness of LED lights are as follows:

[0075] A21. Calculate the initial brightness adjustment value based on the actual intensity of the ambient light. The calculation formula is as follows:

[0076] L0=(|L p -L th |)*k1, where L p is the actual light intensity, L th is the light intensity threshold, L0 is the preliminary brightness adjustment value, and k1 is the basic brightness adjustment coefficient;

[0077] A22. Calculate the final brightness adjustment value based on the vehicle speed and the preliminary brightness adjustment value. The calculation formula is as follows:

[0078] L=L0+k2*(|VV th |), where L is the final brightness adjustment value, V is the actual speed of the vehicle, in km / h, V th is the speed limit of road vehicles, L0 is the initial brightness adjustment value, and k2 is the vehicle speed brightness adjustment coefficient;

[0079] A23. Use the adjustment formula to adjust the value of k3 according to the external factors of vehicle load and weather conditions to adjust the brightness. The adjustment formula is as follows:

[0080] L'=L*(1+k3), where L' is the brightness of the light after adjustment, L is the final brightness adjustment value, k3 is the influence coefficient, and when k3 is a positive value, the brightness is increased, and when k3 is a negative value, the brightness is decreased;

[0081] A3. Based on the image data transmitted by the camera, an image recognition algorithm is used to identify whether there is a curve or obstacle ahead, and the illumination angle of the LED lamp 4 is adjusted according to the curve or obstacle situation;

[0082] The steps for adjusting the illumination angle of LED lamp 4 are as follows:

[0083] A31, the camera captures the road image in front of the vehicle in real time and transmits the image data to the controller;

[0084] A32. The controller uses the image recognition algorithm to process and analyze the image to identify whether there is a curve or obstacle ahead. The following situations exist:

[0085] A321. When a curve is identified, the radius of the curve needs to be further calculated, and then the light irradiation angle of the LED lamp that needs to be adjusted is calculated based on the vehicle's driving speed V and the curve radius R. The calculation formula is as follows:

[0086] In the formula, g is the acceleration due to gravity, R is the radius of the curve, V is the vehicle speed, and θ wan is the angle of the curved light of the LED lamp;

[0087] A322. When an obstacle is identified, the distance sensor senses the position and distance of the obstacle, and determines whether the light irradiation angle needs to be reduced to avoid dazzling the driver of the vehicle ahead. The determination method of whether the light irradiation angle needs to be reduced is as follows: when the obstacle distance is less than the set safety distance, the LED light irradiation angle needs to be reduced by a linear adjustment formula, and the linear adjustment formula is as follows:

[0088] θ new =θ wan -k4*(|d th -d|), where θ new is the adjusted light irradiation angle, θ wan is the angle of the LED light, k4 is the coefficient of the control angle reduction, d th is the safety distance value set between the vehicle and the obstacle, and d is the actual distance between the vehicle and the obstacle;

[0089] When the obstacle distance is greater than or equal to the set safety distance, there is no need to reduce the LED light irradiation angle, and the process returns to step A31;

[0090] A33. Calculate the final angle adjustment value θ' of the LED light angle according to the calculated curve angle adjustment value and obstacle angle adjustment value. The calculation formula is: θ'=θ wan +θ new ;

[0091] A34. The controller sends a control signal to the angle adjustment mechanism according to the final angle adjustment value θ', driving the LED lamp to rotate to the corresponding angle.

[0092] The angle adjustment mechanism and dimming circuit are the angle adjustment mechanism and dimming circuit disclosed in the above-mentioned adaptive energy-saving automobile headlight, and will not be repeated here.

[0093] Through the cooperation of the sensor group, controller, dimming circuit and angle adjustment mechanism, it can automatically sense changes in the external environment, such as ambient light intensity, road conditions and vehicle speed, and automatically adjust the brightness and light angle of the headlights according to changes in the external environment without the need for manual operation by the driver, thereby improving driving convenience and comfort.

[0094] Based on the above-described control system of an adaptive energy-saving automobile headlight, the present invention also provides a control method of an adaptive energy-saving automobile headlight, such as Figure 8 As shown, the following steps are included:

[0095] S1. According to different environments and driving requirements, the light intensity threshold for distinguishing between daytime and nighttime lighting environments and the vehicle speed threshold for brightness and angle adjustment are pre-set, and the correlation coefficients of brightness adjustment and angle adjustment are initialized;

[0096] S2, collects the ambient light intensity data, the distance between the vehicle and the obstacle, and the radius signal of the curve ahead in real time through the sensor group, and transmits the collected data to the control module;

[0097] S3, the control module analyzes and processes the collected data, and performs brightness adjustment and angle adjustment according to the analysis results; the brightness adjustment and angle adjustment methods are the same as the LED light illumination adjustment and LED light angle adjustment methods disclosed in the above-mentioned adaptive energy-saving automobile headlight control system, and will not be repeated here;

[0098] S4: Continuously collect sensor group data in real time, and repeat the brightness adjustment and angle adjustment steps in S3 to adapt to the changing driving environment.

[0099] This method can collect sensor data in real time and continuously repeat the steps of brightness and angle adjustment according to environmental changes. This enables the headlights to adapt to the changing driving environment in real time, such as sudden changes in light, changes in road conditions, etc., always maintain the best lighting state, and provide stable and reliable lighting support for the driver.

[0100] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive energy-saving automobile headlight, characterized in that: The invention comprises a base (2), one side of the base (2) is equipped with an angle adjustment mechanism (10), a lamp mounting plate (7) is mounted on the angle adjustment mechanism (10), an LED lamp (4) is mounted on the lamp mounting plate (7), a lamp cover (1) is sleeved on the outside of the LED lamp (4), one end of the lamp cover (1) is detachably connected to the base (2) through a locking mechanism (3), a control module (6) with adaptive brightness adjustment is detachably mounted on the other side of the base (2), and a mounting groove (8) for mounting the control module (6) is provided on the other side of the base (2), a cover plate (5) is detachably mounted at the notch of the mounting groove (8), the cover plate (5) is in contact with the control module (6), and the control module (6) is electrically connected to the lamp mounting plate (7) and the angle adjustment mechanism (10).

2. The adaptive energy-saving automobile headlight according to claim 1, characterized in that: The locking mechanism (3) comprises an insertion rod (31) fixed to one end of the lampshade (1) and an elastic locking rod slidably mounted on the side wall of the base (2); a plug hole for inserting one end of the insertion rod (31) is provided on one side of the base (2); and a locking hole for locking the locking rod is provided on the insertion rod (31).

3. The adaptive energy-saving automobile headlight according to claim 2, characterized in that: The locking rod comprises a T-shaped rod (32) and a limit block (34) fixed at one end of the T-shaped rod (32); when the insertion rod (31) is inserted into the insertion hole, the limit block (34) is located inside the locking hole; a reset spring (33) is sleeved on the outer wall of the T-shaped rod (32) near one end of the limit block (34); and a sliding hole for installing the reset spring (33) and slidingly installing the T-shaped rod (32) is provided on the side wall of the base (2).

4. The adaptive energy-saving automobile headlight according to claim 3, characterized in that: The angle adjustment mechanism (10) comprises a motor (105) and a transmission mechanism connected to the motor (105); the motor (105) is fixed to one side of the base (2) via a fixing plate (101); two support plates (102) are fixed to one side of the fixing plate (101); the transmission mechanism is mounted on the two support plates (102); two connecting plates (103) are fixed to the other side of the lamp mounting plate (7); and two ends of the transmission mechanism are respectively connected to the two connecting plates (103).

5. The adaptive energy-saving automobile headlight according to claim 4, characterized in that: The control module includes a sensor group, a controller and a dimming circuit. The controller is electrically connected to the motor, the sensor group and the dimming circuit respectively. The sensor group includes a light sensor for detecting the intensity of ambient light, a distance sensor for detecting the distance between the vehicle and an obstacle or other vehicle ahead, and a camera for identifying a curve ahead. The dimming circuit adjusts the LED lamp driving current according to the signal of the controller, thereby achieving adjustment of the LED lamp illumination intensity.

6. The adaptive energy-saving automobile headlight according to claim 5, characterized in that: The dimming circuit includes a power supply, an MCU, a PWM signal generator, a driving circuit, a current sensor and a temperature sensor. The current sensor, the temperature sensor, the PWM signal generator and the power supply are all electrically connected to the MCU, and the PWM signal generator is electrically connected to the driving circuit. The MCU is a single-chip microcomputer with digital signal processing capabilities.

7. A control system for an adaptive energy-saving automobile headlight, based on an adaptive energy-saving automobile headlight according to any one of claims 1 to 6, characterized in that: It includes a sensor group, a controller, a dimming circuit and an angle adjustment mechanism. The controller is electrically connected to the sensor group, the dimming circuit and the angle adjustment mechanism respectively. The sensor group is used to collect various information about the vehicle's surrounding environment. The controller receives data from the sensor group and analyzes and processes it, and sends control instructions to the dimming circuit and the angle adjustment mechanism according to preset rules and algorithms to achieve adaptive adjustment of the headlights. The dimming circuit adjusts the driving current of the LED lamp according to the instructions sent by the controller, thereby controlling the illumination intensity of the LED light. The angle adjustment mechanism drives the transmission mechanism according to the instructions of the controller, so that the transmission mechanism drives the LED lamp to rotate to adjust the illumination angle of the light.

8. The control system of the adaptive energy-saving automobile headlight according to claim 7, characterized in that: The controller analyzes and processes the received sensor group data as follows: A1. Set the light intensity threshold L according to the daytime and nighttime lighting environment th , and then according to the light intensity data from the light sensor and the light intensity threshold L th Compare and judge the current ambient light conditions. When the light intensity data is less than the light intensity threshold L th When the light intensity data is greater than the light intensity threshold L th When , it is judged as a high light environment; A2. Combining the ambient light intensity and vehicle speed information, the LED light intensity is adjusted and determined, and the LED light brightness is adjusted according to the determination result; The steps for adjusting the brightness of LED lights are as follows: A21. Calculate the initial brightness adjustment value based on the actual intensity of the ambient light. The calculation formula is as follows: L0=(|L p -L th |)*k1, where L p is the actual light intensity, L th is the light intensity threshold, L0 is the preliminary brightness adjustment value, and k1 is the basic brightness adjustment coefficient; A22. Calculate the final brightness adjustment value based on the vehicle speed and the preliminary brightness adjustment value. The calculation formula is as follows: L=L0+k2*(|VV th |), where L is the final brightness adjustment value, V is the actual speed of the vehicle, in km / h, V th is the speed limit of road vehicles, L0 is the initial brightness adjustment value, and k2 is the vehicle speed brightness adjustment coefficient; A23. Use the adjustment formula to adjust the value of k3 according to the external factors of vehicle load and weather conditions to adjust the brightness. The adjustment formula is as follows: L'=L*(1+k3), where L' is the brightness of the light after adjustment, L is the final brightness adjustment value, k3 is the influence coefficient, and when k3 is a positive value, the brightness is increased, and when k3 is a negative value, the brightness is decreased; A3. Based on the image data transmitted by the camera, the image recognition algorithm is used to identify whether there is a curve or obstacle ahead, and the LED light angle is adjusted according to the curve or obstacle situation.

9. The control system of the adaptive energy-saving automobile headlight according to claim 8, characterized in that: In step A3, the steps for adjusting the LED light angle are as follows: A31, the camera captures the road image in front of the vehicle in real time and transmits the image data to the controller; A32. The controller uses the image recognition algorithm to process and analyze the image to identify whether there is a curve or obstacle ahead. The following situations exist: A321. When a curve is identified, the radius of the curve needs to be further calculated, and then the light irradiation angle of the LED lamp that needs to be adjusted is calculated based on the vehicle's driving speed V and the curve radius R. The calculation formula is as follows: In the formula, g is the acceleration due to gravity, R is the radius of the curve, V is the vehicle speed, and θ wan is the angle of the LED light’s curved light; A322. When an obstacle is identified, the distance sensor senses the position and distance of the obstacle, and determines whether the light irradiation angle needs to be reduced to avoid dazzling the driver of the vehicle ahead. The determination method of whether the light irradiation angle needs to be reduced is as follows: when the obstacle distance is less than the set safety distance, the LED light irradiation angle needs to be reduced by a linear adjustment formula, and the linear adjustment formula is as follows: θ new =θ wan -k4*(|d th -d|), where θ new is the adjusted light irradiation angle, θ wan is the angle of the LED light, k4 is the coefficient of the control angle reduction, d th is the safety distance value set between the vehicle and the obstacle, and d is the actual distance between the vehicle and the obstacle; When the obstacle distance is greater than or equal to the set safety distance, there is no need to reduce the LED light irradiation angle, and the process returns to step A31; A33. Calculate the final angle adjustment value θ' of the LED light angle according to the calculated curve angle adjustment value and obstacle angle adjustment value. The calculation formula is: θ'=θ wan +θ new ; A34. The controller sends a control signal to the angle adjustment mechanism according to the final angle adjustment value θ', driving the LED lamp to rotate to the corresponding angle.

10. A control method for an adaptive energy-saving automobile headlight, based on the adaptive energy-saving automobile headlight according to any one of claims 1 to 6, characterized in that: The steps include: S1. According to different environments and driving requirements, the light intensity threshold for distinguishing between daytime and nighttime lighting environments and the vehicle speed threshold for brightness and angle adjustment are pre-set, and the correlation coefficients of brightness adjustment and angle adjustment are initialized; S2, collects the ambient light intensity data, the distance between the vehicle and the obstacle, and the radius signal of the curve ahead in real time through the sensor group, and transmits the collected data to the control module; S3, the control module analyzes and processes the collected data, and adjusts the brightness and angle according to the analysis results; S4: Continuously collect sensor group data in real time, and repeat the brightness adjustment and angle adjustment steps in S3 to adapt to the changing driving environment.

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