Automatic dimming headlamp for locomotive meeting

Abstract

An automatic dimming headlamp for locomotive meeting comprises a reflector lamp cup, an LED light-emitting module and a driver which are arranged in a lamp body shell, a meeting sensor is installed in the light emitting direction penetrating through the reflector lamp cup or in front of the reflector lamp cup and used for sensing coming vehicles of the opposite side, the meeting sensor is connected with a light source element sequentially through a regulator and the LED driver, and the light source element is connected with the LED light-emitting module. The light-emitting brightness of the light-emitting element is reduced during meeting. The utility model provides a more perfect locomotive headlamp composition scheme, and can realize automatic dimming without turning off when the locomotives meet relatively, so as to avoid obstacles for drivers of both parties to observe a front track.

Description

Technical Field

[0001] The utility model relates to a motorcycle accessory, in particular to an automatic dimming headlamp for a motorcycle meeting another vehicle. Background Art

[0002] Since its inception, railway locomotives have been continuously improved and perfected. During the operation of locomotives on the line, although we have entered the era of information automation, the driver still needs to control the unexpected situations that randomly appear on the track, especially near the railway plank road. Since the locomotive headlights in the existing technology do not have a dimming mechanism when meeting other trains, if two locomotives meet, the locomotive headlights will directly illuminate the opposite cab, seriously affecting the driver's line of sight, posing a major safety hazard. In actual operation, there have indeed been precedents where the headlights of one party affected the line of sight of the other driver when meeting, resulting in forced parking, which affected the operation plan of the entire line. Therefore, there is an urgent need to improve the current locomotive headlights so that the headlights can automatically dim when the locomotives meet, so as to avoid affecting the actual operation. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a locomotive with an automatically dimming headlamp for meeting other vehicles, so that the locomotive can automatically detect, judge, dim and reduce the light when meeting other vehicles, thereby ensuring the safe operation of the locomotive.

[0004] The locomotive on-coming automatic dimming headlamp includes a reflective lamp cup, an LED light-emitting module and a driver placed in the lamp body shell. The light is emitted through the light-transmitting mirror in front of the reflective lamp cup and the front of the lamp body shell. It is characterized in that a on-coming sensor is installed through the reflective lamp cup or in front of the reflective lamp cup in the direction of light emission, which is used to sense oncoming vehicles. The on-coming sensor is connected to the light source element through the regulator and the LED driver in turn, which is used to reduce the brightness of the light-emitting element when meeting other vehicles.

[0005] In one embodiment, the oncoming vehicle sensor is a photosensitive element, an output terminal of the photosensitive element and a preset value in a regulator are input to a comparison circuit, and the regulator outputs an adjustment state to an adjustment setting terminal of an LED driver.

[0006] The photosensitive element is installed in the filter tube, which is in the shape of a hollow tube with an inner wall and an open front end. The axis of the filter tube is parallel to the axis of the reflector lamp cup.

[0007] In another embodiment, the oncoming vehicle sensor is a laser ranging device, the output end of the laser ranging device and a preset value in the regulator are input to the comparison circuit together, and the regulator outputs the adjustment state to the adjustment setting end of the LED driver.

[0008] As an embodiment of the regulator, the comparison circuit in the regulator outputs to the control part of the regulating switch J. The regulating switch J is connected in parallel with the regulating resistor RA and then in series with the setting resistor RB to be connected to the regulating setting terminal of the LED driver.

[0009] As a perfect solution of the embodiment, the controller is provided with an external signal interface, and the external signal and the output end of the oncoming vehicle sensor enter the comparison circuit of the controller through a selection switch.

[0010] The LED driver is provided with an external manual switch.

[0011] The utility model proposes a more perfect locomotive headlight composition scheme, which can realize automatic dimming and light reduction without shutting down when locomotives are meeting each other, thereby avoiding obstacles for drivers of both sides to observe the track ahead.

[0012] The oncoming vehicle sensor solution utilizes both passive and active detection. Passive detection utilizes a photosensitive element that uses a filter to select the direction of received light and identify it as the oncoming vehicle's headlights. Active detection utilizes a laser ranging device to detect the distance to the oncoming vehicle based on the received or returned signal. The analog output is fed into a controller, which generates the required resistor parameters for the LED driver. The LED driver utilizes a mature power LED driver chip.

[0013] The controller's external input signals also selectively control the oncoming vehicle sensor signals, eliminating incident light in specific situations, such as tunnel entrances or areas of intense sunlight. A manual switch for manual intervention has also been incorporated. This approach allows for reliable implementation with a simple hardware module, shortening the development cycle and ensuring feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main view of the overall structure diagram of the utility model.

[0015] Figure 2 yes Figure 1 Bottom view of .

[0016] Figure 3 yes Figure 1 rear view.

[0017] Figure 4 yes Figure 1 AA view of Example 1.

[0018] Figure 5 yes Figure 1 AA view of Example 2.

[0019] Figure 6 It is an exploded three-dimensional diagram of the structure of the utility model.

[0020] Figure 7 This is a circuit principle block diagram of the utility model.

[0021] Figure 8 This is a circuit principle diagram embodiment of the present utility model.

[0022] In the figure: 1-light transmitting mirror, 2-lamp housing, 3-radiator, 4-base box, 5-terminal, 6-cooling fan, 7-aluminum base plate, 8-reflective lamp cup, 9-oncoming sensor, 10-light source element, 11-filter tube, 12-controller, 13-LED driver, 14-manual switch, 15-driver chip, 16-external signal. DETAILED DESCRIPTION

[0023] The utility model is further described below with reference to the accompanying drawings and embodiments: the locomotive automatic dimming headlight is used for automatically dimming the headlights of two trains when they are meeting each other, without turning them off, to avoid obstruction to the drivers of both sides in observing the track ahead.

[0024] like Figure 1-6 As shown in FIG, the structure of the automatic dimming headlamp for meeting locomotives includes a light-transmitting mirror 1, a reflective lamp cup 8, an LED light-emitting module, an aluminum base plate 7, a heat sink 3, and a cooling fan 6, which are arranged in sequence within a lamp housing 2. A base box 4 with a built-in driver 13 is fixed at the bottom. The LED light-emitting module mainly comprises an LED light source element array, with light source elements 10 independently positioned at the bottom center of each reflective lamp cup 8. The parabolic reflective lamp cup 8 is formed by integrating the multiple lamp cup arrays. This allows light emitted by the light source elements 10 to be emitted straight forward through the light-transmitting mirror 1.

[0025] A vehicle-oncoming sensor 9 is installed within the lamp housing 2 or outside the light-transmitting mirror 1, either in front of the reflector cup 8, or behind the reflector cup 8 with a passageway extending through the reflector cup 8, and approximately parallel to the direction of light emission. This sensor is used to sense oncoming vehicles directly ahead, supported by circuitry. Installing it outside the light-transmitting mirror 1 provides better detection.

[0026] One embodiment of the installation position of the oncoming sensor 9 is to fix it close to the inner or outer side of the light-transmitting mirror 1, one embodiment is to install it on the lamp body shell 2 outside the edge of the light-transmitting mirror 1, which is more convenient for receiving the other party's light, and another embodiment is to install it on the lamp cup.

[0027] like Figure 7 As shown, the output end of the oncoming sensor 9 is connected to the light source element 10 through the regulator 12 and the LED driver 13 in sequence. When the output signal of the oncoming sensor 9 is judged to be true, the LED driver 13 dims the light instead of shutting off the light emission. This is used to reduce the brightness of the light-emitting element when oncoming vehicles are oncoming, but it can still play a role in road lighting.

[0028] In one embodiment, a passive detection method is adopted, wherein the oncoming vehicle sensor 9 is a photosensitive element, such as a phototransistor or a photoresistor, and the output end of the photosensitive element and the preset value in the regulator 12 are input to the comparison circuit for comparison. The comparison circuit outputs the output result as the compared parameter value, and the output state is used as the preset value of the adjustment setting end of the LED driver 13. Figure 8 As shown, the output of the photosensitive element and the reference voltage output by the voltage divider are respectively connected to the two inputs of the Schmitt comparator. The output of the comparator outputs a corresponding potential value based on the comparison result. If the photosensitive element is stimulated by strong light and outputs a voltage higher than the reference voltage, the comparator outputs a saturated high level, energizing the coil of the drive relay J. The resistor RA at the output of the regulator 12 is short-circuited, and the set resistance value of the driver chip 15 of the LED driver 13 is selected to RB. The output power of the driver chip 15 is reduced, and the light source element 10 emits light at a reduced level. If the photosensitive element is not stimulated, the opposite occurs. The set resistance value of the driver chip 15 of the LED driver 13 is selected to RA + RB, and the output power of the driver chip 15 is increased, and the light source element 10 emits light normally.

[0029] In this embodiment, the recognition efficiency of the photosensitive element is crucial. By installing it in a filter tube 11, which is a hollow cylinder with an open front end, and orienting the filter tube 11 so that its axis is parallel to the axis of the reflector cup 8, only strong light from the opposite direction is recognized, while stray light from other directions is ignored.

[0030] In another embodiment, active detection is adopted. The oncoming vehicle sensor 9 is a laser distance measuring device, which actively emits laser light to the front and measures the reflected signal, and the signal of the set distance and direction is recognized. Figure 8 In this embodiment, the laser distance measuring device is provided with an analog signal output terminal. The output terminal of the laser distance measuring device and the preset value in the controller 12 are input to the comparison circuit. The output adjustment state of the controller 12 determines the resistance parameter of the adjustment setting terminal of the LED driver 13. The LED driver adopts a mature power LED driver chip, such as the SL8443B with built-in power tube, H5528L / H5521L.

[0031] As an example of a controller, Figure 8 As shown, the comparison circuit in the regulator 12 is a Schmitt comparator, the output end of the Schmitt comparator is connected to the coil control end of the regulation switch J, the regulation switch J is connected in parallel with the regulation resistor RA and then in series with the setting resistor RB, and then connected to the adjustment setting end of the LED driver 13.

[0032] As a perfect solution of the embodiment, Figure 8 For example, the controller 12 is equipped with an external signal interface 16. The external signal 16 and the output of the oncoming vehicle sensor 9 are fed into the controller 12's comparison circuit via a selector switch. Selective control of the oncoming vehicle sensor signal is implemented to reject incident light in specific situations, such as at tunnel entrances or in brightly lit areas. A manual switch 14 is also included for manual intervention.

[0033] By adopting this solution, the required oncoming vehicle dimming control function can be reliably implemented with a simple hardware module, and the development cycle is short and feasible.

[0034] The above embodiments can be used interchangeably or simultaneously as needed.

Claims

1. A motorcycle meeting automatic dimming headlamp, comprising a reflective lamp cup (8), an LED light module and a driver (13) disposed in a lamp housing (2), wherein light is emitted through a light-transmitting mirror (1) in front of the reflective lamp cup (8) and in front of the lamp housing (2), characterized in that: A vehicle-oncoming sensor (9) is installed through the reflective lamp cup (8) or in front of the reflective lamp cup (8) in the direction of light emission, and is used to sense oncoming vehicles. The vehicle-oncoming sensor (9) is connected to the light source element (10) through a controller (12) and an LED driver (13) in sequence, and is used to reduce the luminous brightness of the light-emitting element when oncoming vehicles occur.

2. The automatic dimming headlamp for meeting a motorcycle according to claim 1, characterized in that: The oncoming vehicle sensor (9) is a photosensitive element, the output end of the photosensitive element and the preset value in the regulator (12) are input to the comparison circuit together, and the regulator (12) outputs the adjustment state to the adjustment setting end of the LED driver (13).

3. The automatic dimming headlamp for meeting other vehicles according to claim 2, characterized in that: The photosensitive element is installed in the filter tube (11). The filter tube (11) is a hollow tube with an open front end and an inner wall. The axis of the filter tube (11) is parallel to the axis of the reflector lamp cup (8).

4. The automatic dimming headlamp for meeting a motorcycle according to claim 1, characterized in that: The oncoming vehicle sensor (9) is a laser distance measuring device, the output end of the laser distance measuring device and the preset value in the regulator (12) are input to the comparison circuit together, and the regulator (12) outputs the adjustment state to the adjustment setting end of the LED driver (13).

5. The automatic dimming headlamp for meeting a motorcycle according to claim 2 or 4, characterized in that: The comparison circuit in the regulator (12) outputs to the control part of the regulating switch J, and the regulating switch J is connected in parallel with the regulating resistor RA and then in series with the setting resistor RB to be connected to the regulating setting end of the LED driver (13).

6. The automatic dimming headlamp for meeting a motorcycle according to claim 2 or 4, characterized in that: The controller (12) is provided with an external signal (16) interface, and the external signal (16) and the output end of the oncoming vehicle sensor (9) enter the comparison circuit of the controller (12) through a selection switch.

7. The automatic dimming headlamp for meeting a motorcycle according to claim 1, characterized in that: The LED driver (13) is provided with an external manual switch (14).

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