Adjustable motorcycle headlamp

Abstract

The invention discloses an adjustable motorcycle headlamp, which relates to the technical field of motorcycle illumination, and comprises a headlamp shell, a reflector and a control unit arranged in the headlamp shell, the compensation module and the three-axis MEMS gyroscope are used for compensating the posture of a vehicle body, the liquid crystal dimming module is used for adjusting the light transmittance, and the buffering mechanism module is used for restraining vibration. The compensation module and the liquid crystal dimming module are electrically connected with the control unit, one end of the buffer mechanism module is connected with a headlamp shell, and the other end is connected with a motorcycle frame; the compensation module comprises a servo motor, and the servo motor is meshed with the lamp body rotating support through a harmonic reducer. According to the adjustable motorcycle headlamp, through gyroscope-servo motor closed-loop control of the compensation module, light beam deviation caused by pitching and side tipping of a motorcycle body is counteracted in real time, the problem of dazzling or insufficient illumination caused by the fixed angle of a traditional headlamp is solved, and the night driving safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of motorcycle lighting technology, and in particular to an adjustable motorcycle headlight. Background Technology

[0002] Motorcycle lighting systems have long relied on mechanical adjustment mechanisms, using manual knobs or counterweights to adjust the headlight angle. While electric adjustment devices have emerged in recent years, they generally suffer from response delays (>200ms) and insufficient accuracy (±2°). With the increasing adoption of ADAS technology in the automotive sector, motorcycle lighting systems have begun to incorporate sensor technology; however, limitations in size and cost have prevented the resolution of challenges related to dynamic compensation and coordinated control of multi-mode switching. Currently, the industry urgently needs an intelligent solution that can adapt to complex road conditions while balancing response speed and adjustment accuracy.

[0003] In actual driving, there are several shortcomings: First, when the vehicle pitches or tilts due to changes in load or road conditions, the headlight beam easily deviates from the target road surface, either dazzling oncoming vehicles or causing insufficient lighting on the road ahead, increasing the risk of nighttime driving; Second, traditional headlight brightness adjustment methods are limited, mostly manual two-level switching, unable to adapt to ambient light (such as city streetlights or dark rural roads) in real time, resulting in energy waste or poor lighting effects; Third, when motorcycles travel on bumpy roads, the headlights are prone to high-frequency vibration with the vehicle body, causing beam flickering, blurring the driver's vision, and further reducing driving safety. In addition, although some high-end models are equipped with simple electric adjustment functions, they lack a coordinated control mechanism, cannot simultaneously address the comprehensive needs of attitude compensation, dimming, and vibration damping, and have poor scalability, making it difficult to adapt to models with different positioning. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an adjustable motorcycle headlight, comprising a headlight housing, a reflector, and a control unit disposed within the headlight housing, further comprising a compensation module for compensating for vehicle posture, a three-axis MEMS gyroscope, a liquid crystal dimming module for adjusting light transmittance, and a buffer mechanism module for suppressing vibration; the compensation module and the liquid crystal dimming module are electrically connected to the control unit, and one end of the buffer mechanism module is connected to the headlight housing and the other end is connected to the motorcycle frame; the compensation module includes a servo motor, which meshes with the headlight body rotating bracket through a harmonic reducer; the liquid crystal dimming module is composed of a polymer-dispersed liquid crystal film sandwiched by an ITO conductive layer and is attached to the front surface of the reflector at a distance of 5mm; the buffer mechanism module includes a hydraulic damper and a nonlinear stiffness spring, with the two ends of the hydraulic damper respectively hinged to the headlight housing and the frame mounting base; The inner wall of the headlight housing is slidably connected to the outer wall of the reflector. A decorative ring is slidably connected to one end of the headlight housing, and decorative blocks are slidably connected to both sides of one end of the decorative ring. A light distribution lens is slidably connected to the outer wall of the headlight housing.

[0005] The above technical solution achieves a stable connection between the lamp body and the vehicle frame, while ensuring the reliability of signal transmission and mechanical transmission of the compensation module and the buffer mechanism module, laying the foundation for subsequent attitude compensation and vibration suppression.

[0006] Preferably, the three-axis MEMS gyroscope has a range of ±2000 dps; the servo motor has a rated torque of 50 mNm.

[0007] Through the above technical solution, the ±2000dps measurement range can fully cover the pitch and roll angle changes of the motorcycle under extreme conditions such as sharp bends and bumpy roads, ensuring that the gyroscope can accurately capture attitude data and avoid detection failure due to insufficient range.

[0008] Preferably, the polymer-dispersed liquid crystal film is a PDLC film with a haze > 90%; the control unit outputs a 0-5V variable voltage to the liquid crystal dimming module to change the arrangement of liquid crystal molecules to adjust the local transmittance.

[0009] The above technical solutions can accurately adapt lighting needs according to ambient light (such as urban streetlights and rural dark roads) and driving scenarios (such as meeting oncoming traffic and driving straight), avoiding excessive brightness or insufficient lighting. At the same time, PDLC thin films have fast response speed and short switching delay, improving driving safety and comfort.

[0010] Preferably, the buffer mechanism module further includes an accelerometer and a solenoid valve. The accelerometer is electrically connected to the control unit, and the solenoid valve is located in the oil circuit of the hydraulic damper. The control unit adjusts the oil circuit diameter of the hydraulic damper through the solenoid valve.

[0011] The above technical solution achieves "on-demand vibration reduction", solving the problems that traditional fixed dampers cannot adapt to complex road conditions and have a single vibration reduction effect, and effectively suppresses light spot vibration.

[0012] Preferably, the servo motor can be replaced with an ultrasonic motor; the hydraulic damper can be replaced with a magnetorheological damper.

[0013] The above technical solution allows for flexible selection of components based on the motorcycle's positioning (commuter or high-end) and installation conditions, avoiding the poor compatibility issues caused by the "one-size-fits-all" approach of traditional solutions.

[0014] Preferably, the compensation module has a compensation delay of <10ms and an angle error controlled within ±0.3°; the sampling frequency of the three-axis MEMS gyroscope is set to 100Hz, and the control unit adopts an STM32 high-performance microcontroller equipped with a PID algorithm.

[0015] The above technical solution addresses the core issues of high delay and large error in traditional compensation mechanisms.

[0016] Preferably, the liquid crystal dimming module achieves switching between three lighting modes through voltage adjustment: in the spotlight mode, the center illuminance is 500 lx; ​​in the floodlight mode, the lighting uniformity is >85%; and in the anti-glare mode, the edge illuminance is reduced by 60%.

[0017] With the above technical solution, the three modes can be switched with one button via voltage, eliminating the need to manually adjust the lamp angle and improving driving convenience and safety.

[0018] Preferably, the damping coefficient of the buffer mechanism module can be adaptively adjusted within the range of 0.5-2.0 N·s / m, achieving an amplitude attenuation rate of up to 70% for high-frequency vibrations.

[0019] Through the above technical solutions, the significantly reduced vibration can also reduce the vibration loss of electronic components inside the lamp body (such as gyroscopes and servo motors), extend the service life of core components, and reduce later maintenance costs.

[0020] Preferably, the upper end of the hydraulic damper is connected to the reserved hole of the frame via a ball joint pin, and the preload torque of the ball joint pin is 25 N·m; the three-axis MEMS gyroscope is connected to the control unit via a waterproof connector, and the connecting cable has a 10 mm bending allowance.

[0021] Through the above technical solutions, waterproof connectors can effectively isolate rainwater and dust, prevent short circuits, and adapt to the complex environment of motorcycle outdoor driving.

[0022] In summary, the present invention provides an adjustable motorcycle headlight, which has the following beneficial effects: 1. This adjustable motorcycle headlight uses a gyroscope-servo motor closed-loop control system in the compensation module to compensate for beam offset caused by vehicle pitch and roll in real time, solving the problems of glare or insufficient lighting caused by the fixed angle of traditional headlights and greatly improving nighttime driving safety.

[0023] 2. This adjustable motorcycle headlight uses voltage-controlled light technology in its LCD dimming module to achieve smooth switching between multiple modes from a single light source, adapting to different scenarios such as urban areas, rural areas, and oncoming traffic. Compared to traditional manual dimming, it is more convenient and energy-efficient.

[0024] 3. This adjustable motorcycle headlight, through the hydraulic-spring composite damping design of the buffer mechanism module, combined with the dynamic adjustment of damping by the solenoid valve, effectively attenuates the vibration of the headlight body on bumpy roads, avoids light spot shaking, and improves the stability of the driver's vision.

[0025] 4. This adjustable motorcycle headlight supports the replacement of core components (servo motor, damper) and can be flexibly configured according to the motorcycle's positioning (commuter type, high-end sports type), with strong expandability and wide applicability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the structure of the present invention; Figure 3 This is an exploded side view of the structure of the present invention; Figure 4 This is a top view of the structure of the present invention; Figure 5 This is a rear exploded view of the structure of the present invention.

[0027] 1. Headlight housing; 2. Reflector; 3. Bezel; 4. Decorative block; 5. Lens; 6. Compensation module; 7. Three-axis MEMS gyroscope. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Example

[0029] Please see Figures 1-5An adjustable motorcycle headlight includes a headlight housing 1, a reflector 2, and a control unit housed within the headlight housing 1. It also includes a compensation module 6 for compensating for vehicle attitude, a three-axis MEMS gyroscope 7, a liquid crystal dimming module for adjusting light transmittance, and a damping mechanism module for suppressing vibration. The three-axis MEMS gyroscope 7 immediately initiates attitude monitoring at a 100Hz sampling frequency, defaulting to outputting an initial zero-point signal (when the vehicle is level). Its ±2000dps range can cover subsequent pitch / roll angle changes under extreme conditions such as sharp bends and steep slopes during driving. The accelerometer of the damping mechanism module enters a low-power monitoring mode, and the solenoid valve defaults to adjusting the hydraulic damper's oil passage diameter to a medium opening, stabilizing the damping coefficient at 1.0N・s / m, suitable for flat urban roads. Initial state of the surface; the compensation module 6 and the liquid crystal dimming module are electrically connected to the control unit respectively. The ITO conductive layer of the liquid crystal dimming module is preheated by electricity, and the PDLC film (haze > 90%) is in the initial light transmission state (default floodlight mode, corresponding to the control unit outputting a voltage of 1.5V, the liquid crystal molecules are arranged in a disordered manner, and the light is scattered uniformly); one end of the buffer mechanism module is connected to the headlight housing 1 and the other end is connected to the motorcycle frame; the compensation module 6 includes a servo motor, which meshes with the lamp body rotating bracket through a harmonic reducer; the liquid crystal dimming module is composed of a polymer dispersed liquid crystal film sandwiched by the ITO conductive layer and is attached to the front surface of the reflector 2 at 5mm; the buffer mechanism module includes a hydraulic damper and a nonlinear stiffness spring, and the two ends of the hydraulic damper are respectively hinged to the headlight housing 1 and the frame mounting base; The inner wall of the headlight housing 1 is slidably connected to the outer wall of the reflector 2. A decorative ring 3 is slidably connected to one end of the headlight housing 1. Decorative blocks 4 are slidably connected to both sides of one end of the decorative ring 3. A light distribution lens 5 is slidably connected to the outer wall of the headlight housing 1.

[0030] The three-axis MEMS gyroscope 7 has a range of ±2000 dps; the servo motor has a rated torque of 50 mNm. After receiving the signal, the servo motor (rated torque 50 mNm) reduces speed and increases torque through a harmonic reducer, driving the lamp body rotating bracket to rotate 12° in the opposite direction (opposite to the vehicle body tilt direction). The position feedback signal corrects the error, ultimately controlling the angle error within ±0.3°. At this time, the reflector 2 rotates synchronously with the lamp body (because the inner wall of the headlight housing 1 is slidably connected to the outer wall of the reflector 2, the reflector 2 will not jam with the housing during rotation, and the light path remains stable), ensuring that the beam always stays close to the road surface, avoiding the problem of traditional fixed headlights "illuminating the roadbed / sky when tilted." The polymer-dispersed liquid crystal film is... PDLC thin film, haze > 90%; the control unit outputs a 0-5V variable voltage to the liquid crystal dimming module to change the arrangement of liquid crystal molecules to adjust the local transmittance. The buffer mechanism module also includes an accelerometer and a solenoid valve. The accelerometer is electrically connected to the control unit. The control unit quickly calculates the compensation amount through a built-in PID algorithm: taking a 12° tilt as an example, the algorithm combines the motorcycle's speed (which can be obtained through the vehicle's CAN bus, not shown) to correct the compensation parameters and outputs a control signal to the servo motor of the compensation module 6. The solenoid valve is located in the oil circuit of the hydraulic damper. The control unit adjusts the oil circuit diameter of the hydraulic damper through the solenoid valve. The servo motor can be replaced with an ultrasonic motor; the hydraulic damper can be replaced with a magnetorheological damper. The compensation module has a compensation delay of <10ms and an angle error controlled within ±0.3°. The sampling frequency of the three-axis MEMS gyroscope 7 is set to 100Hz. The control unit uses a high-performance STM32 microcontroller with a PID algorithm. The liquid crystal dimming module achieves three lighting modes through voltage adjustment: in the focused light mode, the center illuminance is 500lx. If weak ambient light is detected or a "focusing" command is triggered, the control unit outputs a high voltage of 4.0-5.0V. The liquid crystal molecules are completely ordered, the PDLC film transmittance reaches over 90%, and the light is focused by the reflector 2 to form a narrow beam with a center illuminance of 500lx, extending the illumination distance to over 50m, meeting the requirements for long-distance obstacle recognition. In floodlight mode, the illumination uniformity is >85%. When the control unit detects strong ambient light (such as street lighting) or the driver triggers the "floodlight" command via the handlebar switch, it outputs a voltage of 1.0-2.0V. The ITO conductive layer forms a weak electric field, and the liquid crystal molecules in the PDLC film are partially arranged in an orderly manner, increasing the light transmittance to 60%-70%. Combined with the curved design of the reflector 2, the light is diffused in a wide range (uniformity >85%), which can cover the road surface within a range of 1.5m on both sides of the vehicle body, eliminating near-field lighting blind spots. In anti-glare mode, the edge illuminance is reduced by 60%. When the light sensor (not shown, but can be integrated into the control unit) detects oncoming vehicle lights or the taillights of the vehicle in front, the control unit immediately switches to 2.5-3.With a 5V voltage, the liquid crystal molecules exhibit localized disordered arrangement, causing a sharp drop in light transmittance (60% attenuation) at the edge of the PDLC film, retaining only weak light illumination in the central area to prevent glare for oncoming drivers while ensuring the user can clearly see the road surface 10-15m ahead. The damping coefficient of the buffer mechanism module can adaptively adjust within the range of 0.5-2.0 N·s / m, achieving a 70% amplitude attenuation rate for high-frequency vibrations. The upper end of the hydraulic damper connects to a pre-drilled hole in the frame via a ball joint pin, with a preload torque of 25 N·m. The three-axis MEMS gyroscope 7 connects to the control unit via a waterproof connector, with the connecting cable having a 10mm bending allowance.

[0031] When the motorcycle is powered on, the STM32 high-performance control unit located inside the headlight housing 1 first completes a self-test, performing signal path detection on the compensation module 6 (including servo motor and harmonic reducer), the three-axis MEMS gyroscope 7, the liquid crystal dimming module, and the buffer mechanism module (hydraulic damper, nonlinear stiffness spring, accelerometer, and solenoid valve). When the motorcycle travels to a curve, slope, or when the load changes (such as carrying passengers or goods), the motorcycle body tilts or pitches. The three-axis MEMS gyroscope 7 instantly captures the attitude change data (such as tilt 12°, pitch 5°) and transmits the data to the control unit with a delay of <10ms. The liquid crystal dimming module achieves mode switching through "control unit voltage output → PDLC film transmittance change". The core logic revolves around the ITO conductive layer-liquid crystal film combination 5mm in front of the reflector 2. When the motorcycle travels on a gravel road, continuous potholes, or other bumpy road surface, the buffer mechanism module activates real-time vibration reduction.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable motorcycle headlight, comprising a headlight housing (1), a reflector (2), and a control unit disposed within the headlight housing (1), characterized in that: It also includes a compensation module (6) for compensating for vehicle body posture and a three-axis MEMS gyroscope (7), a liquid crystal dimming module for adjusting light transmittance and a buffer mechanism module for suppressing vibration; the compensation module (6) and the liquid crystal dimming module are electrically connected to the control unit respectively, and one end of the buffer mechanism module is connected to the headlight housing (1) and the other end is connected to the motorcycle frame; the compensation module (6) includes a servo motor, which meshes with the lamp body rotating bracket through a harmonic reducer; the liquid crystal dimming module is composed of a polymer dispersed liquid crystal film sandwiched by an ITO conductive layer and is attached to the front surface of the reflector (2) at 5mm; the buffer mechanism module includes a hydraulic damper and a nonlinear stiffness spring, and the two ends of the hydraulic damper are respectively hinged to the headlight housing (1) and the frame mounting base; The inner wall of the headlight housing (1) is slidably connected to the outer wall of the reflector (2). A decorative ring (3) is slidably connected to one end of the headlight housing (1). Decorative blocks (4) are slidably connected to both sides of one end of the decorative ring (3). A light distribution lens (5) is slidably connected to the outer wall of the headlight housing (1).

2. The adjustable motorcycle headlight according to claim 1, characterized in that: The three-axis MEMS gyroscope (7) has a range of ±2000dps; the servo motor has a rated torque of 50mNm.

3. An adjustable motorcycle headlight according to claim 1, characterized in that: The polymer-dispersed liquid crystal film is a PDLC thin film with a haze > 90%; the control unit outputs a 0-5V variable voltage to the liquid crystal dimming module to change the arrangement of liquid crystal molecules to adjust the local transmittance.

4. An adjustable motorcycle headlight according to claim 1, characterized in that: The buffer mechanism module also includes an accelerometer and a solenoid valve. The accelerometer is electrically connected to the control unit, and the solenoid valve is located in the oil circuit of the hydraulic damper. The control unit adjusts the oil circuit diameter of the hydraulic damper through the solenoid valve.

5. An adjustable motorcycle headlight according to claim 1, characterized in that: The servo motor can be replaced with an ultrasonic motor; the hydraulic damper can be replaced with a magnetorheological damper.

6. An adjustable motorcycle headlight according to claim 1, characterized in that: The compensation module (6) has a compensation delay of <10ms and the angle error is controlled within ±0.3°; the sampling frequency of the three-axis MEMS gyroscope (7) is set to 100Hz, and the control unit adopts an STM32 high-performance microcontroller and is equipped with a PID algorithm.

7. An adjustable motorcycle headlight according to claim 1, characterized in that: The liquid crystal dimming module achieves three lighting modes through voltage adjustment: in the spotlight mode, the center illuminance is 500 lx; ​​in the floodlight mode, the lighting uniformity is >85%; and in the anti-glare mode, the edge illuminance is reduced by 60%.

8. An adjustable motorcycle headlight according to claim 1, characterized in that: The damping coefficient of the buffer mechanism module can be adaptively adjusted within the range of 0.5-2.0 N·s / m, and the amplitude attenuation rate of high-frequency vibration reaches 70%.

9. An adjustable motorcycle headlight according to claim 1, characterized in that: The upper end of the hydraulic damper is connected to the reserved hole of the frame through a ball head pin, and the preload torque of the ball head pin is 25 N·m; the three-axis MEMS gyroscope (7) is connected to the control unit through a waterproof connector, and the connection cable is reserved with a bending allowance of 10 mm.

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