Bicycle tail door opening and closing sensing device capable of automatically focusing projection and vehicle

Abstract

The embodiment of the utility model discloses a bicycle tail door opening and closing sensing device capable of automatically focusing projection and a vehicle. The device comprises a shell, a focus-adjustable projection module, a sensing module and a main control module. The focusable projection module is arranged in the shell and used for projecting light spots, the sensing module is arranged in the shell and used for sensing trigger signals in a projection area of the focusable projection module, and the main control module is electrically connected with the focusable projection module and the sensing module. And the main control module can control the focus of the focus-adjustable projection module. According to the bicycle tail door opening and closing sensing device, the focus-adjustable projection module can be automatically focused, it can be ensured that light spot patterns projected on the ground are clear, the bicycle tail door opening and closing sensing device can adapt to different vehicle types, even if a vehicle is provided with an air suspension, the focus can be automatically focused to ensure that the light spot patterns are clear, and the safety of the vehicle is improved. The problems that a current prime lens is narrow in definition range and is difficult to adapt to various vehicle types and air suspensions are solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a pedal vehicle tailgate opening and closing sensor device with automatic focusing projection and a vehicle. Background Art

[0002] With the application of intelligent vehicle technology and the development of intelligent industry, vehicles are becoming more and more intelligent, comfortable and convenient. For example, the traditional opening and closing methods of the tailgate of a vehicle include key button opening, tailgate outer button opening and other press-type opening and closing methods. These methods may be inconvenient in certain specific scenarios. For example, when your hands are full of things and you cannot touch the tailgate switch, the problem can be solved by stepping on the tailgate opening and closing sensor device, which allows users to open the trunk without using their hands.

[0003] The pedal vehicle tailgate opening and closing sensor device is an intelligent tailgate trunk sensing switch product with multiple sensing modes, such as ultrasonic sensors, infrared sensors, capacitive sensors, millimeter wave radar sensors and lidar sensors.

[0004] Taking capacitive sensors as an example, current capacitive sensors have low power consumption and are always powered when installed and in use, ensuring they remain operational. Especially for aftermarket products, capacitive kick sensors remain operational even after the vehicle is locked. When a kick signal is detected, it notifies the relevant controllers (such as the tailgate controller, body controller, and PEPS controller). These controllers (typically the PEPS controller) then detect whether the key is within the vehicle's vicinity. If a key is detected, the tailgate opens; if not, the kick signal is ignored. Because capacitive sensors lack a target indicator, users cannot tell where the kick was made, resulting in low user experience. Currently, adding a projection device to the tailgate sensor to project a light spot on the ground as an indicator, alerting users to the location of the kick or step, significantly enhancing the user experience. LiDAR-based sensors, in particular, offer precise ranging capabilities, which can improve the accuracy of foot-operated door opening and reduce false triggers (where the sensor interprets a foot step as occurring despite the absence of a foot step). Combined with the projected light spot, this can provide a superior user experience.

[0005] Currently, the projection devices added to pedal-operated tailgate sensors are all fixed-focus projection devices. Because installation heights and angles vary across different vehicle models, even the same fixed-focus projection device can be installed at different heights, resulting in varying projection clarity. Consequently, the projection lens often needs to be replaced for each vehicle model, resulting in a large number of lens models and high development and management costs. Some vehicles feature air suspension, and the projection distance of the pedal-operated tailgate sensor, mounted on the rear bumper, changes with air suspension adjustments, resulting in reduced projection clarity. Utility Model Content

[0006] To address one of the above technical deficiencies, the present disclosure provides a pedal-operated vehicle tailgate opening and closing sensor device with automatic focusing projection and a vehicle.

[0007] According to a first aspect of the present application, there is provided a pedal vehicle tailgate opening and closing sensor device with projected and automatically adjustable focus, comprising:

[0008] case;

[0009] a focusable projection module, the focusable projection module being disposed on the housing and configured to project a light spot;

[0010] a sensor module, the sensor module being disposed in the housing and configured to sense a trigger signal within a projection area of the focus-adjustable projection module;

[0011] A main control module is provided in the housing, the main control module is electrically connected to the focus-adjustable projection module and the sensor module respectively, and the main control module can control the focus of the focus-adjustable projection module.

[0012] Optionally, the focus-adjustable projection module includes a projection lamp, a lamp driving circuit board, a film and a focus-adjustable lens;

[0013] The lamp driving circuit board is connected to the projection lamp;

[0014] The light emitted by the projection lamp passes through the film and the focusable lens in sequence and then exits the housing;

[0015] The main control module is electrically connected to the lamp driving circuit board and the focus-adjustable lens respectively, and the main control module can control the focus of the focus-adjustable lens.

[0016] Optionally, the main control module includes a main circuit board, and the sensor module is arranged on the main circuit board;

[0017] The lamp driving circuit board is spaced apart from the main circuit board;

[0018] The main circuit board is connected to the lamp driving circuit board through a wire.

[0019] Optionally, the housing has an upper plate and a lower plate that are arranged opposite to each other;

[0020] The lamp driving circuit board is fixedly connected to the upper plate;

[0021] There is a distance between the focus-adjustable lens and the lower plate;

[0022] The main circuit board is connected to the lower board;

[0023] The lower plate is provided with avoidance holes corresponding to the focus-adjustable lens and the sensor module.

[0024] Optionally, the focus-adjustable lens comprises a lens assembly, and the focus-adjustable lens is focused by adjusting the shape of the lens assembly;

[0025] Alternatively, the focusable lens has a driving assembly, which is in transmission connection with the lens assembly, and the driving assembly drives the lens assembly to move relative to the film to adjust the focus.

[0026] Optionally, the driving assembly includes a voice coil motor or a piezoelectric actuator, and the lens assembly is in transmission connection with the piezoelectric actuator or the voice coil motor. The main control module controls the voice coil motor or the piezoelectric actuator by inputting different voltages to the voice coil motor or the piezoelectric actuator to drive the lens assembly towards or away from the film. Alternatively, the driving assembly includes a motor, and the motor is in transmission connection with the lens assembly to drive the lens assembly towards or away from the film.

[0027] Optionally, the projection automatically focusable pedal vehicle tailgate opening and closing sensor device includes a distance sensor, the distance sensor is used to obtain a projection distance, the projection distance being the distance from the projection module to the ground;

[0028] The main control module is used to control the focus parameters of the projection module according to the projection distance.

[0029] Optionally, the main control module includes a storage unit, which is used to store a correspondence between a voltage value and a projection distance value, and the main control module is used to output a corresponding voltage value to the voice coil motor or the piezoelectric actuator according to the projection distance.

[0030] Optionally, the sensing module is the distance sensor;

[0031] The sensing module is selected from any one of a millimeter wave radar sensor, a laser radar sensor, and an ultrasonic radar sensor.

[0032] According to a second aspect of the present application, a vehicle is provided, which has the above-mentioned pedal vehicle tailgate opening and closing sensor device with automatic projection focus.

[0033] By adopting the above technical solution, the present application has the following beneficial effects:

[0034] The pedal-operated vehicle tailgate opening and closing sensor device of the present application can automatically adjust the focus, which can ensure that the light spot pattern projected on the ground by the adjustable-focus projection module is clear. The pedal-operated vehicle tailgate opening and closing sensor device can be adapted to different vehicle models. Even if the vehicle has air suspension, it can automatically adjust the focus to ensure the clarity of the light spot pattern, solving the problem that the current fixed-focus lens has a narrow clarity range and is difficult to adapt to a variety of vehicle models and air suspensions.

[0035] The technical solution of the present disclosure is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0037] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0038] Figure 1 A schematic diagram showing a pedal vehicle tailgate opening and closing sensor device provided in an embodiment of the present application is shown;

[0039] Figure 2 An exploded view of a pedal vehicle tailgate opening and closing sensor device provided in an embodiment of the present application is shown;

[0040] Figure 3 A schematic diagram showing a partial structure of a projection module provided in an embodiment of the present application is shown;

[0041] Figure 4 A schematic diagram illustrating a projection module of a pedal vehicle tailgate opening and closing sensor device provided in an embodiment of the present application is shown.

[0042] In the figure, 1. Shell; 11. Upper plate; 12. Lower plate; 2. Projection module; 21. Lamp driving circuit board; 211. Projection lamp; 22. Focusing system; 23. Film; 24. Adjustable focus lens; 242. Drive component; 3. Sensor module; 4. Main control module; 5. Light.

[0043] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0045] See also Figures 1 to 4As shown, an embodiment of the present application provides a pedal-operated vehicle tailgate opening and closing sensor device with automatic projector focus, comprising: a housing 1, a focus-adjustable projection module 2, a sensor module 3, and a main control module 4. The focus-adjustable projection module 2 is disposed in the housing 1 and is used to project a light spot. The sensor module 3 is disposed in the housing 1 and is used to sense a trigger signal within the projection area of the focus-adjustable projection module 2. The main control module 4 is disposed in the housing 1 and is electrically connected to the focus-adjustable projection module 2 and the sensor module 3, respectively. The main control module 4 can control the focus of the focus-adjustable projection module 2.

[0046] The main control module 4 is used to control the working status of the focusable projection module 2 and the sensor module 3, receive data from the sensor module 3 and determine whether there is a kicking or stepping action. If a kicking or stepping action is detected, a door opening request signal is sent to the entire vehicle through the connector and wiring harness.

[0047] The adjustable-focus projection module 2 of the pedal-operated vehicle tailgate opening and closing sensor device of the present application can automatically adjust the focus, which can ensure that the light spot pattern projected on the ground by the adjustable-focus projection module 2 is clear. The pedal-operated vehicle tailgate opening and closing sensor device can be adapted to different vehicle models. Even if the vehicle has air suspension, it can automatically adjust the focus to ensure the clarity of the light spot pattern, thus solving the problem that the current fixed-focus lens has a narrow clarity range and is difficult to adapt to a variety of vehicle models and air suspensions.

[0048] In some possible embodiments, such as Figure 4 As shown, the focusable projection module 2 includes a projection lamp 211, a lamp driving circuit board 21, a film 23 and a focusable lens 24. The lamp driving circuit board 21 is connected to the projection lamp 211. The light 5 emitted by the projection lamp 211 passes through the film 23 and the focusable lens 24 in sequence and then exits the housing 1. The main control module 4 is electrically connected to the lamp driving circuit board 21 and the focusable lens 24 respectively. The main control module 4 can control the focus of the focusable lens 24.

[0049] The focusable projection module 2 can rely on the principle of lens imaging, which is similar to a film projector and generally consists of a projection lamp 211, a focusing system 22, a film 23, and a focusable lens 24.

[0050] The projection lamp 211, the focusing system 22, the film 23, and the focusable lens 24 are arranged in sequence along the longitudinal direction and encapsulated by the housing to form an integral structure. The light 5 emitted by the projection lamp 211 magnifies the pattern in the film 23 and projects it onto a specific area to form a light spot with the corresponding pattern. The focusing system 22 may include a first lens and a second lens, and the focusable lens 24 may include multiple third lenses. The optical path thereof is as follows: Figure 4As shown, the cone-shaped light 5 emitted by the projection lamp 211 is converted into uniform parallel light 5 after passing through the first lens and the second lens. The uniform parallel light 5 passes through the film 23 and is further magnified after passing through multiple third lenses, thereby projecting the inverted small pattern on the film 23 into a magnified upright large pattern and projecting it onto the ground.

[0051] It should be noted that the film 23 may be a film sheet, and the projection lamp 211 may be an LED lamp. The main control module 4 may be a single-chip microcomputer, on which a DAC (digital-to-analog converter) may be integrated. The DAC (digital-to-analog converter) is connected to the focusable lens of the focusable projection module 2. The DAC (digital-to-analog converter) is used to convert the digital signal output by the single-chip microcomputer into an analog voltage signal and send it to the focusable lens to control the focus of the focusable lens.

[0052] The main control module 4 is electrically connected to the light driver circuit board 21 (e.g., an LED PCB) and can control the lighting and extinguishing of the projection lamp 211, as well as the brightness of the projection lamp 211. The main control module can use PWM (Pulse Width Modulation) technology to digitally encode analog signal levels and send them to the light driver circuit board 21 (e.g., an LED PCB) to control the brightness of the light driver circuit board 21. The main control module 4 is electrically connected to the focusable lens 24 and can control the position of the lens components within the focusable lens 24 (e.g., each third lens element), thereby achieving focus control and adjusting the clarity of the projected light spot.

[0053] In some possible implementations, see Figure 2 As shown, the main control module 4 of the projector's automatically focusable pedal vehicle tailgate opening and closing sensor device includes a main circuit board, a sensor module 3 is arranged on the main circuit board, a light driving circuit board 21 is spaced apart from the main circuit board, and the main circuit board is connected to the light driving circuit board 21 via a wire.

[0054] The lamp driver circuit board 21 generates a lot of heat, which will affect the normal operation of the sensor module 3 and the main control module 4. In order to reduce the impact of the heat generated by the lamp driver circuit board 21 on the sensor module 3 and the main control module 4, in the embodiment of the present application, the lamp driver circuit board 21 and the main circuit board are set separately, and there is a distance between the two to prevent the heat generated by the lamp driver circuit board 21 from affecting the normal operation of the sensor module 3 and the main control module 4.

[0055] In some possible implementations, see Figure 2 As shown, the shell 1 has an upper plate 11 and a lower plate 12 arranged relatively to each other, the lamp driving circuit board 21 is fixedly connected to the upper plate 11, the focusable lens 24 and the lower plate 12 are spaced apart, the main circuit board is connected to the lower plate 12, and the lower plate 12 is provided with avoidance holes corresponding to the focusable lens 24 and the sensor module 3.

[0056] The lamp driving circuit board 21 is fixedly connected to the upper plate body 11, and the main circuit board is connected to the lower plate body 12. The distance between the two is large, and the lamp driving circuit board 21 has little impact on the main circuit board. The adjustable focus lens 24 will move up and down when focusing. In the embodiment of the present application, a movable space is reserved between the bottom end of the adjustable focus lens 24 and the lower plate body 12 to meet the focus adjustment requirements of the adjustable focus projection module 2 and avoid structural damage caused by the adjustable focus lens 24 hitting the top limit on the lower plate body 12 when the adjustable focus lens 24 moves telescopically.

[0057] In some possible embodiments, the focus-adjustable lens 24 includes a lens assembly, and the focus-adjustable lens 24 adjusts the focus by adjusting the shape of the lens assembly (e.g., a portion of the third lens). For example, the lens assembly may be a liquid crystal lens, which changes the arrangement of the liquid crystal layer to affect the propagation path of the light 5, thereby achieving focus adjustment without mechanical movement.

[0058] In some possible embodiments, combined Figure 3 and Figure 4 As shown, the focusable lens 24 has a driving assembly 242, which is in transmission connection with the lens assembly. The driving assembly 242 drives the lens assembly to move relative to the film 23 for focusing.

[0059] The main control module 4 is electrically connected to the driving assembly 242 and can control the driving assembly 242 to drive the lens assembly to move relative to the film 23 for focusing.

[0060] The drive assembly 242 can adopt a variety of different implementations. Several feasible implementations are provided below:

[0061] The first solution: Drive assembly 242 may include a voice coil motor, which is widely used in autofocus systems. Voice coil motors provide fast and precise focus adjustment. For example, a lens assembly is connected to the voice coil motor. Voltage is input via main control module 4, and the voice coil motor can change the position of the lens assembly, adjusting the projection distance between the lens assembly and the ground, thereby adjusting the clarity of the projected light spot.

[0062] A second approach involves driver assembly 242 comprising a piezoelectric actuator. Piezoelectric actuators utilize the piezoelectric effect, which physically deforms certain materials when voltage is applied. Small piezoelectric elements can achieve very precise displacement, making them suitable for fine-tuning the focal length of precision instruments. In this embodiment, the lens assembly is connected to the piezoelectric actuator. The main control module 4 controls the piezoelectric actuator by inputting different voltages to the actuator, thereby moving the lens assembly toward or away from the film 23.

[0063] In some possible implementations, the driving assembly 242 includes a motor, which is in transmission connection with the lens assembly to drive the lens assembly toward or away from the film 23 .

[0064] The motor may be a stepper motor, which is widely used in electric focusing systems due to its precise position control. They can rotate precisely according to the number of input electrical pulses, and each pulse only rotates a fixed angle.

[0065] When a linear stepper motor is selected as the motor, it can directly drive the lens assembly to move along the linear track.

[0066] When a rotary stepper motor is used as the motor, the rotary motion can be converted into linear movement of the lens assembly through mechanical structures such as gears, belts or screws, thereby also achieving the adjustment of the lens assembly to move along a straight line.

[0067] In some possible implementation schemes, the main control module has a storage unit, which is used to store the correspondence between the voltage value and the projection distance value. The main control module 4 is used to output the corresponding voltage value to the voice coil motor or piezoelectric actuator according to the projection distance, so that the lens assembly moves the corresponding distance and the projection module projects a clearer light spot.

[0068] The projected distance value is the distance between the pedal vehicle tailgate opening and closing sensor device and the ground. The distance value can be input into the main control module 4 by the user or can be automatically measured by the device.

[0069] For example, when developing a vehicle tailgate opening and closing sensor device using a voice coil motor as driver component 242, the voice coil motor drive voltage and projection distance are calibrated. After the product is installed on a vehicle, the projection distance may vary depending on the vehicle's mounting height, or even if the air suspension is positioned differently on the same vehicle. Each time the product is operated, it first measures the distance to the ground. Based on the pre-calibrated projection distance and voice coil motor voltage, the voice coil motor is then energized with the corresponding voltage. The voice coil motor then drives the lens assembly to the desired position, projecting a clear image onto the ground.

[0070] In some possible implementations, a pedal-operated vehicle tailgate opening and closing sensor device with automatic projector focus includes a distance sensor for detecting the projection distance, which is the distance between the projection module 2 and the ground. The main control module 4 is configured to control the focus parameters of the projection module 2 based on the projection distance. When the drive assembly 242 is a voice coil motor, the focus parameter can be understood as the movement distance of the lens assembly or the voltage applied to the voice coil motor.

[0071] In some possible implementations, a projected, automatically focusable pedal-operated tailgate opening and closing sensor device can be configured without a dedicated distance sensor. Sensor module 3 can be used directly as the distance sensor, thereby simplifying the structure and reducing costs. In this case, sensor module 3 can be selected from any of a millimeter-wave radar sensor, a lidar sensor, and an ultrasonic radar sensor, and any device capable of measuring distance can be used.

[0072] The embodiment of the present application also provides a vehicle, comprising: a vehicle body and a pedal vehicle tailgate opening and closing sensor device with an automatically adjustable projection focus. The pedal vehicle tailgate opening and closing sensor device with an automatically adjustable projection focus is arranged on the vehicle body.

[0073] Specifically, the vehicle body has a rear bumper, and the projected automatically focusable pedal vehicle tailgate opening and closing sensor device can be installed on the rear bumper and connected to the entire vehicle through a wiring harness to obtain power and communicate with the vehicle body.

[0074] In some possible implementations, the projected automatically focusable pedal vehicle tailgate opening and closing sensor device has a connector, which is electrically connected to the main control module 4 , and the connector is connected to a circuit on the vehicle body.

[0075] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0076] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0077] The above description has been provided for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A projector with automatic focus and pedal-operated vehicle tailgate opening and closing sensor device, characterized in that: include: case; a focusable projection module, the focusable projection module being disposed on the housing and configured to project a light spot; a sensor module, the sensor module being disposed in the housing and configured to sense a trigger signal within a projection area of the focus-adjustable projection module; A main control module is provided in the housing, the main control module is electrically connected to the focus-adjustable projection module and the sensor module respectively, and the main control module can control the focus of the focus-adjustable projection module.

2. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 1, characterized in that: The focus-adjustable projection module includes a projection lamp, a lamp driving circuit board, a film and a focus-adjustable lens; The lamp driving circuit board is connected to the projection lamp; The light emitted by the projection lamp passes through the film and the focusable lens in sequence and then exits the housing; The main control module is electrically connected to the lamp driving circuit board and the focus-adjustable lens respectively, and the main control module can control the focus of the focus-adjustable lens.

3. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 2, characterized in that: The main control module includes a main circuit board, and the sensor module is arranged on the main circuit board; The lamp driving circuit board is spaced apart from the main circuit board; The main circuit board is connected to the lamp driving circuit board through a wire.

4. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 3, characterized in that: The housing comprises an upper plate and a lower plate which are arranged opposite to each other; The lamp driving circuit board is fixedly connected to the upper plate; There is a distance between the focus-adjustable lens and the lower plate; The main circuit board is connected to the lower board; The lower plate is provided with avoidance holes corresponding to the focus-adjustable lens and the sensor module.

5. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 2, characterized in that: The focus-adjustable lens comprises a lens assembly, and the focus-adjustable lens is focused by adjusting the shape of the lens assembly; Alternatively, the focusable lens has a driving assembly, which is in transmission connection with the lens assembly, and the driving assembly drives the lens assembly to move relative to the film to adjust the focus.

6. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 5, characterized in that: The driving assembly includes a voice coil motor or a piezoelectric actuator, and the lens assembly is in transmission connection with the piezoelectric actuator or the voice coil motor. The main control module controls the voice coil motor or the piezoelectric actuator by inputting different voltages to the voice coil motor or the piezoelectric actuator to drive the lens assembly towards or away from the film; alternatively, the driving assembly includes a motor, and the motor is in transmission connection with the lens assembly to drive the lens assembly towards or away from the film.

7. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 6, characterized in that: A distance sensor is included, wherein the distance sensor is used to obtain a projection distance, where the projection distance is the distance from the projection module to the ground; The main control module is used to control the focus parameters of the projection module according to the projection distance.

8. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 7, characterized in that: The main control module includes a storage unit, which is used to store the corresponding relationship between the voltage value and the projection distance value. The main control module is used to output the corresponding voltage value to the voice coil motor or the piezoelectric actuator according to the projection distance.

9. The projection and automatically focusable pedal vehicle tailgate opening and closing sensor device according to claim 7, characterized in that: The sensing module is the distance sensor; The sensing module is selected from any one of a millimeter wave radar sensor, a laser radar sensor, and an ultrasonic radar sensor.

10. A vehicle, characterized in that: A pedal vehicle tailgate opening and closing sensor device with automatic focusing projection as claimed in any one of claims 1 to 9.

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