Portable head lamp and lighting method thereof

Abstract

The invention relates to the technical field of head lamp sensing and automatic control, in particular to a portable head lamp and an illumination method thereof, the head lamp comprises a control module and an illumination module, the control module comprises a processing unit and a light intensity sensor, the light intensity sensor is in communication connection with the input end of the processing unit, and the illumination module is in communication connection with the processing unit. The output end of the processing unit is in communication connection with the lighting module; the control module further comprises a distance sensor, and the distance sensor is in communication connection with the input end of the processing unit. The light intensity sensor is used for detecting the intensity of a light beam reflected by the surface of an illuminated object and generating a light intensity signal, the distance sensor is used for detecting the distance between the head lamp and the illuminated object and generating a distance signal, and the processing unit receives and processes the light intensity signal and the distance signal and generates a control signal. The lighting module adjusts the lighting condition according to the control signal, and self-adaptive adjustment of the lighting condition of the head lamp is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of headlamp sensing and automatic control, and more particularly to a portable headlamp and a lighting method thereof. Background Art

[0002] LED headlights are portable lighting devices that use LEDs as light sources. They are highly efficient, energy-saving, and have a long lifespan. LED headlights are very useful in many different application scenarios and are often used for outdoor hiking, camping, mountaineering, fishing, caving, underground exploration, and other activities. They can provide sufficient lighting to make people safer and more convenient at night or in dim environments. For those who need to work in professional scenarios, such as repairmen, construction workers, search and rescue personnel, etc., LED headlights can enable them to obtain effective lighting while keeping their hands free to better complete the given tasks.

[0003] Currently, most headlight adjustments require manual switching of preset gears, and cannot adaptively adjust the total output power of the headlight and the output ratio of light sources of different focal lengths according to the current scene. When the user selects the maximum power, the beam suddenly moves to nearby objects, causing the user's eyes to adapt to the strong light. When the user selects the minimum power, the beam suddenly moves to distant objects, resulting in insufficient light. Depending on whether the light is directed at the near view or the distant view, different visual discomforts will occur unless the user manually adjusts the corresponding gear every time it moves, which will affect the user's concentration on the current task.

[0004] The prior art discloses a lighting device with an LED for detection, comprising at least one LED for lighting, wherein the controller has a sensor input terminal, the sensor input terminal is used to receive a measurement signal indicating the measured illuminance; wherein the photosensitive device is coupled to the sensor input terminal of the controller; in a dark environment, the controller is suitable for setting the average light output to a relatively low value; and in a bright environment, the controller is suitable for setting the average light output to a relatively high value. In this solution, the current of the LED is provided by a driver, and the driver is controlled by the controller based on a sensor signal received from the LED used as a light sensor at the sensor input terminal of the controller. This solution only modifies the light output of the light source according to the ambient brightness level, and cannot adjust the light output in a comprehensive manner according to the user's usage scenario. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a portable headlamp and a lighting method thereof, which comprehensively senses the user scene through a light intensity sensor and a distance sensor, and adaptively adjusts the lighting conditions of the headlamp to meet the user's needs.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A portable headlamp is provided, comprising a control module and a lighting module, wherein the control module comprises a processing unit and a light intensity sensor, wherein the light intensity sensor is communicatively connected to an input end of the processing unit, and an output end of the processing unit is communicatively connected to the lighting module; the control module further comprises a distance sensor, wherein the distance sensor is communicatively connected to an input end of the processing unit; the light intensity sensor is used to detect the intensity of a light beam reflected from a surface of an illuminated object and generate a light intensity signal, the distance sensor is used to detect the distance between the headlamp and the illuminated object and generate a distance signal, the processing unit receives and processes the light intensity signal and the distance signal to generate a control signal, and the lighting module adjusts the lighting condition according to the control signal.

[0008] When the portable headlamp of the present invention is used, the intensity of the light beam reflected from the surface of the illuminated object is sensed by the light intensity sensor, a light intensity signal is generated and communicated with the processing unit; the distance between the headlamp and the illuminated object is sensed by the distance sensor, a distance signal is generated and communicated with the processing unit; the processing unit processes the collected light intensity signal and distance signal and generates a control signal, and the lighting module adjusts the lighting condition according to the control signal to adapt to the corresponding lighting scene needs. In the present invention, the user scene is comprehensively sensed by the light intensity sensor and the distance sensor, and the lighting condition of the headlamp is adaptively adjusted to meet the user's needs, thereby improving the comfort of use and the effective lighting time.

[0009] Furthermore, the lighting module includes a power supply control unit, a focusing light group and a pan-focus light group, the focusing light group is used to emit a focusing light beam, and the pan-focus light group is used to emit a pan-focus light beam, the output end of the processing unit is communicatively connected to the power supply control unit, and the focusing light group and the pan-focus light group are respectively communicatively connected to the power supply control unit.

[0010] Furthermore, the processing unit includes a receiving subunit, a storage subunit and a control subunit, the light intensity sensor and the distance sensor are respectively communicatively connected to the receiving subunit, the receiving subunit, the storage subunit and the lighting module are respectively communicatively connected to the control subunit, the storage subunit stores a plurality of preset configuration files, the preset configuration files include preset data parameters, and the control subunit is used to compare the light intensity signal and the distance signal with the preset data parameters to activate the corresponding preset configuration file, and then compare the difference between the light intensity signal and the distance signal and the preset data parameters of the corresponding preset configuration file and generate a control signal.

[0011] Furthermore, the preset configuration file includes power ratio, light intensity threshold, and color temperature of the focus light group and the pan-focus light group.

[0012] The present application also provides a lighting method of a portable headlamp, which is applied to the above-mentioned portable headlamp, and the method comprises the following steps:

[0013] S1: Detecting the intensity of the light beam reflected from the surface of the illuminated object by means of a light intensity sensor and generating a light intensity signal, detecting the distance between the headlight and the illuminated object by means of a distance sensor and generating a distance signal, and inputting the light intensity signal and the distance signal into a processing unit;

[0014] S2: The processing unit receives and processes the light intensity signal and the distance signal, generates a control signal, and transmits the control signal to the lighting module;

[0015] S3: The lighting module adjusts the lighting condition according to the control signal.

[0016] The portable headlamp lighting method of the present invention senses the intensity of the light beam reflected from the surface of the illuminated object through a light intensity sensor, generates a light intensity signal and communicates with a processing unit; senses the distance between the headlamp and the illuminated object through a distance sensor, generates a distance signal and communicates with the processing unit; the processing unit processes the collected light intensity signal and distance signal and generates a control signal, and the lighting module adjusts the lighting condition according to the control signal to adapt to the corresponding lighting scene needs. In the present invention, the light intensity sensor and the distance sensor are used to comprehensively sense the user scene, and the lighting condition of the headlamp is adaptively adjusted to meet the user's needs, thereby improving the comfort of use and the effective lighting time.

[0017] Preferably, in step S2, the working process of the processing unit is:

[0018] S21: Compare the received light intensity signal and distance signal with preset data parameters to determine the scene where the headlight is located;

[0019] S22: Activate the corresponding preset configuration file according to the scene where the headlight is located;

[0020] S23: Compare the difference between the light intensity signal and the distance signal and the preset configuration file, and generate a control signal to communicate with the lighting module.

[0021] Preferably, the lighting module includes a power supply control unit, a focusing light group and a pan-focus light group, the power supply control unit provides power to the focusing light group and the pan-focus light group, the focusing light group is used to emit a focusing light beam, the pan-focus light group is used to emit a pan-focus light beam, and the control signal is transmitted to the power supply control unit.

[0022] Preferably, the power supply control unit adjusts the power output to the focusing light group and the pan-focus light group according to the control signal, so as to adjust the total power output of the lighting module and the power ratio of the light groups with different focal lengths.

[0023] Preferably, the light intensity sensor and the distance sensor perform detection periodically to achieve periodic feedback control of the headlight.

[0024] Preferably, the light intensity sensor is a photoresistor, a photodiode, a phototransistor or a digital photosensor; the distance sensor is an ultrasonic distance sensor, an infrared distance sensor, a millimeter wave sensor or a ToF (time of flight) sensor.

[0025] Compared with the background technology, the portable headlamp and the lighting method thereof of the present invention have the following beneficial effects:

[0026] The light intensity sensor and distance sensor comprehensively sense the user scene and adaptively adjust the lighting conditions of the headlights to meet user needs, improving user comfort and effective lighting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a functional block diagram of a portable headlamp according to an embodiment of the present invention;

[0028] Figure 2 is a flow chart of a lighting method of a portable headlamp according to an embodiment of the present invention;

[0029] Figure 3 4 is a flowchart of a processing unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] This embodiment is a portable headlamp. Figure 1As shown, it includes a control module and a lighting module. The control module includes a processing unit and a light intensity sensor. The light intensity sensor is communicatively connected to the input end of the processing unit, and the output end of the processing unit is communicatively connected to the lighting module. The control module also includes a distance sensor, which is communicatively connected to the input end of the processing unit. The light intensity sensor is used to detect the intensity of the light beam reflected from the surface of the illuminated object and generate a light intensity signal. The distance sensor is used to detect the distance between the headlight and the illuminated object and generate a distance signal. The processing unit receives and processes the light intensity signal and the distance signal to generate a control signal. The lighting module adjusts the lighting condition according to the control signal.

[0033] When the portable headlamp is used, the light intensity sensor senses the intensity of the light beam reflected from the surface of the illuminated object, generates a light intensity signal and communicates with the processing unit; the distance sensor senses the distance between the headlamp and the illuminated object, generates a distance signal and communicates with the processing unit; the processing unit processes the collected light intensity signal and distance signal and generates a control signal, and the lighting module adjusts the lighting condition according to the control signal to meet the needs of the corresponding lighting scene. In this embodiment, the light intensity sensor and the distance sensor are used to comprehensively sense the user scene, and the lighting condition of the headlamp is adaptively adjusted to meet the needs of the user, thereby improving the comfort of use and the effective lighting time.

[0034] like Figure 1 As shown, the lighting module includes a power supply control unit, a focusing light group and a pan-focus light group. The focusing light group is used to emit a focusing light beam, and the pan-focus light group is used to emit a pan-focus light beam. The output end of the processing unit is connected to the power supply control unit for communication, and the focusing light group and the pan-focus light group are connected to the power supply control unit for communication. During implementation, the power size and ratio of the focusing light group and the pan-focus light group can be adjusted by the power supply control unit, thereby adjusting the overall brightness of the headlight, and making the electric energy obtained by the focusing light group and the pan-focus light group reach a corresponding ratio, realizing the conversion of the ratio of the focusing and pan-focus light groups to adapt to different usage scenarios.

[0035] The focusing light group and the pan-focus light group may each be composed of one light emitting diode, or may each be composed of two or more light emitting diode arrays.

[0036] The processing unit includes a receiving subunit, a storage subunit and a control subunit. The light intensity sensor and the distance sensor are respectively connected to the receiving subunit for communication. The receiving subunit, the storage subunit and the lighting module are respectively connected to the control subunit for communication. The storage subunit stores a number of preset configuration files, and the preset configuration files include preset data parameters. The control subunit is used to compare the light intensity signal and the distance signal with the preset data parameters to activate the corresponding preset configuration file, and then compare the difference between the light intensity signal and the distance signal and the preset data parameters of the corresponding preset configuration file and generate a control signal. During implementation, after receiving the light intensity signal and the distance signal, the receiving subunit transmits the two sensed signals to the control subunit. The control subunit compares the two sensed signals with the preset data parameters stored in the storage subunit, determines the environment in which the headlights are located, and activates the corresponding preset configuration file. The preset configuration file includes data such as the power ratio, light intensity threshold, and color temperature of the focus light group and the pan-focus light group. The control subunit compares the difference between the two sensed signals and the preset data parameters in the preset configuration file, and then generates a control signal to communicate with the power supply module unit of the lighting module. The power supply control unit adjusts the power size and ratio of the focus light group and the pan-focus light group.

[0037] Specifically, the distance interval parameter between the headlight and the map is measured in advance, and a light intensity interval parameter suitable for reading is set, and the distance interval parameter and the light intensity interval parameter are built into the processing unit; when the user uses the headlight to view the map, the headlight uses the light intensity sensor and the distance sensor to sense the light intensity information and distance information of the user's current scene, and generates a light intensity signal and a distance signal to communicate with the processing unit; when the processing unit compares the distance signal with the pre-measured interval parameter, when the sensed distance signal is within the distance interval parameter built into the processing unit, it switches to the map viewing mode, and the power proportion allocated to the pan-focus light group will increase to provide a wide lighting range. At the same time, the light intensity signal is compared with the brightness interval parameter built into the processing unit, and the brightness of the headlight is controlled by limiting the total power. Finally, the processing unit outputs a control signal, and the power supply control unit executes the control signal to output different powers to the focus light group and the pan-focus light group, thereby achieving a wide range of lighting conditions suitable for reading.

[0038] Similarly, the distance interval parameter of the headlamp lighting distance required for outdoor search is measured in advance, and a light intensity interval parameter suitable for outdoor search is set, and the distance interval parameter and the light intensity interval parameter are built into the processing unit; when the user uses the headlamp for outdoor search, the lighting requirement is to search for the target with high-brightness focused light. The headlamp uses the light intensity sensor and the distance sensor to sense the light intensity information and distance information of the user's current scene, and generates a light intensity signal and a distance signal to communicate with the processing unit. The processing unit compares the distance signal and the light intensity signal with the preset interval parameters. When the distance signal is in the distance interval parameter built into the processing unit, it switches to the outdoor search mode, and the power proportion allocated to the focused light group will increase. At the same time, the light intensity signal is compared with the light intensity interval parameter built into the processing unit. When the light intensity signal is in the light intensity interval parameter built into the processing unit, the total output power will be increased to achieve high brightness. The processing unit outputs a control signal to the power supply control unit, and the power supply control unit executes the control signal to output electrical energy to achieve a lighting situation dominated by a focused light beam, which is convenient for searching targets in the wild.

[0039] This embodiment is a lighting method of a portable headlamp, which is applied to the above-mentioned portable headlamp, such as Figure 2 As shown, the method comprises the following steps:

[0040] Pre-measure the distance interval parameters between the headlight and the illuminated object in different scenarios, and set appropriate light intensity interval parameters in different usage scenarios, and store the preset data parameters in the processing unit;

[0041] S1: Detect the intensity of the light beam reflected from the surface of the illuminated object through the light intensity sensor and generate a light intensity signal, detect the distance between the headlight and the illuminated object through the distance sensor and generate a distance signal, and input the light intensity signal and the distance signal into the processing unit;

[0042] S2: The processing unit receives and processes the light intensity signal and the distance signal, generates a control signal, and transmits the control signal to the lighting module; the specific process is as follows:

[0043] S21: Compare the received light intensity signal and distance signal with preset data parameters to determine the scene where the headlight is located;

[0044] S22: Activate the corresponding preset configuration file according to the scene where the headlight is located;

[0045] S23: comparing the difference between the light intensity signal and the distance signal and the preset configuration file, and generating a control signal to communicate with the lighting module;

[0046] By comparing the sensing signal with the preset data parameters, the scene in which the headlight is located is determined, and then the preset configuration file is activated and called, and the control signal is generated after another comparison;

[0047] S3: The lighting module adjusts the lighting condition according to the control signal;

[0048] Specifically, the lighting module includes a power supply control unit, a focusing light group and a pan-focus light group. The power supply control unit provides power for the focusing light group and the pan-focus light group. The focusing light group is used to emit a focusing light beam, and the pan-focus light group is used to emit a pan-focus light beam. A control signal is transmitted to the power supply control unit; the processing unit outputs a control signal, and the power supply control unit adjusts the power output to the focusing light group and the pan-focus light group according to the control signal, thereby realizing the adjustment of the total output power of the lighting module and the power ratio of light groups with different focal lengths, thereby realizing adaptive lighting in corresponding scenes.

[0049] The above-mentioned portable headlamp lighting method senses the intensity of the light beam reflected from the surface of the illuminated object through the light intensity sensor, generates a light intensity signal and communicates with the processing unit; senses the distance between the headlamp and the illuminated object through the distance sensor, generates a distance signal and communicates with the processing unit; the processing unit processes the collected light intensity signal and distance signal and generates a control signal, and the lighting module adjusts the lighting condition according to the control signal to adapt to the corresponding lighting scene needs. In this embodiment, the user scene is comprehensively sensed by the light intensity sensor and the distance sensor, and the lighting condition of the headlamp is adaptively adjusted to meet the user's needs, improve the user comfort and effective lighting time.

[0050] The light intensity sensor and the distance sensor perform detection periodically to achieve periodic feedback control of the headlights.

[0051] The light intensity sensor is a photoresistor, a photodiode, a digital illuminance sensor or a phototransistor; the distance sensor is an ultrasonic distance sensor, an infrared distance sensor, a millimeter wave sensor or a ToF (time of flight) sensor. It should be noted that other light intensity sensors that can sense the ambient light intensity in this embodiment and distance sensors that sense the distance from the headlight to the illuminated object are applicable to this embodiment.

[0052] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features 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.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A portable headlamp, comprising a control module and a lighting module, wherein the control module comprises a processing unit and a light intensity sensor, wherein the light intensity sensor is communicatively connected to an input end of the processing unit, and an output end of the processing unit is communicatively connected to the lighting module; It is characterized in that The control module also includes a distance sensor, which is communicatively connected to the input end of the processing unit; the light intensity sensor is used to detect the intensity of the light beam reflected from the surface of the illuminated object and generate a light intensity signal, the distance sensor is used to detect the distance between the headlight and the illuminated object and generate a distance signal, the processing unit receives and processes the light intensity signal and the distance signal to generate a control signal, and the lighting module adjusts the lighting condition according to the control signal.

2. The portable headlamp according to claim 1, It is characterized in that The lighting module includes a power supply control unit, a focusing light group and a pan-focus light group. The focusing light group is used to emit a focusing light beam, and the pan-focus light group is used to emit a pan-focus light beam. The output end of the processing unit is communicatively connected to the power supply control unit, and the focusing light group and the pan-focus light group are respectively communicatively connected to the power supply control unit.

3. The portable headlamp according to claim 2, It is characterized in that The processing unit includes a receiving subunit, a storage subunit and a control subunit. The light intensity sensor and the distance sensor are respectively connected to the receiving subunit for communication. The receiving subunit, the storage subunit and the lighting module are respectively connected to the control subunit for communication. The storage subunit stores a plurality of preset configuration files, and the preset configuration files include preset data parameters. The control subunit is used to compare the light intensity signal and the distance signal with the preset data parameters to activate the corresponding preset configuration file, and then compare the difference between the light intensity signal and the distance signal and the preset data parameters of the corresponding preset configuration file and generate a control signal.

4. The portable headlamp according to claim 3, It is characterized in that The preset configuration file includes the power ratio, light intensity threshold, and color temperature of the focus light group and the pan-focus light group.

5. A portable headlamp lighting method, applied to the portable headlamp according to any one of claims 1 to 4, It is characterized in that The method comprises the following steps: S1: Detecting the intensity of the light beam reflected from the surface of the illuminated object by means of a light intensity sensor and generating a light intensity signal, detecting the distance between the headlight and the illuminated object by means of a distance sensor and generating a distance signal, and inputting the light intensity signal and the distance signal into a processing unit; S2: The processing unit receives and processes the light intensity signal and the distance signal, generates a control signal, and transmits the control signal to the lighting module; S3: The lighting module adjusts the lighting condition according to the control signal.

6. The portable headlamp lighting method according to claim 5, It is characterized in that In step S2, the working process of the processing unit is: S21: Compare the received light intensity signal and distance signal with preset data parameters to determine the scene where the headlight is located; S22: Activate the corresponding preset configuration file according to the scene where the headlight is located; S23: Compare the difference between the light intensity signal and the distance signal and the preset configuration file, and generate a control signal to communicate with the lighting module.

7. The portable headlamp lighting method according to claim 5, It is characterized in that The lighting module includes a power supply control unit, a focusing light group and a pan-focus light group. The power supply control unit provides power to the focusing light group and the pan-focus light group. The focusing light group is used to emit a focusing light beam, and the pan-focus light group is used to emit a pan-focus light beam. The control signal is transmitted to the power supply control unit.

8. The portable headlamp lighting method according to claim 7, It is characterized in that The power supply control unit adjusts the power output to the focusing light group and the pan-focus light group according to the control signal, thereby adjusting the total power output of the lighting module and the power ratio of the light groups with different focal lengths.

9. The portable headlamp lighting method according to claim 5, It is characterized in that The light intensity sensor and the distance sensor perform detection periodically to achieve periodic feedback control of the headlights.

10. The lighting method of the portable headlamp according to any one of claims 5 to 9, It is characterized in that The light intensity sensor is a photoresistor, a photodiode, a phototransistor or a digital photosensor; the distance sensor is an ultrasonic distance sensor, an infrared distance sensor, a millimeter wave sensor or a ToF sensor.

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