Liftable street lamp for automobile night test

Abstract

The invention discloses a liftable street lamp for automobile night testing, belongs to the technical field of automatic driving function testing, and mainly aims to adjust the height of a lamp post. According to the main technical scheme, the liftable street lamp for testing the automobile at night comprises a lamp pole, a light source assembly and an inflation and deflation assembly; the lamp pole is of a nested structure and comprises at least four sections of sleeves, in the radial direction of the lamp pole, the diameters of the sleeves are sequentially decreased from the sleeve on the outermost layer to the sleeve on the inner layer, and a nested gap is formed between every two adjacent sleeves; the light source assembly is fixedly arranged on the top of the sleeve on the innermost layer. The inflation and deflation assembly is communicated with the bottom of the sleeve on the outermost layer.

Description

Technical Field

[0001] This application belongs to the technical field of autonomous driving function testing, and specifically relates to a liftable street lamp for vehicle night testing. Background Art

[0002] Traditional street lamp poles are designed with a fixed height, which cannot meet the technical requirements of dynamic adjustment of street lamp height for night testing of advanced driver assistance systems (ADAS) in vehicles. According to the "CJJ45-2015 Urban Road Lighting Design Standard" and the "EN13201 European Road Lighting Standard", night testing of ADAS systems needs to simulate various scenarios such as conventional lighting (≤15 meters) and high mast lighting (≥20 meters), and different height lighting conditions often need to be quickly switched in the same test project. For example, in the long-distance obstacle recognition test of the adaptive cruise function, the street lamp needs to be raised to more than 20 meters to ensure that the long-distance lighting coverage and intensity meet the sensor detection requirements; while in the pedestrian detection test of automatic emergency braking, the street lamp needs to be lowered to 5-8 meters to simulate the lighting shadow effect at pedestrian height and avoid misjudgment by the sensor due to lighting angle problems. However, traditional fixed-height street lamps can only provide a single lighting height, which can neither meet the rigid requirements of national and European standards for street lamp height between different test projects nor achieve multi-height dynamic switching in the same test, resulting in a significant deviation between the night performance test results of the ADAS system and the real scenario, seriously affecting the comprehensiveness and accuracy of the test. Summary of the Invention

[0003] In view of this, this application provides a liftable street lamp for vehicle night testing, and the main purpose is to adjust the height of the lamp pole.

[0004] To achieve the above object, this application mainly provides the following technical solutions:

[0005] This application provides a liftable street lamp for vehicle night testing, including:

[0006] A lamp pole, a light source assembly, and an air charging and discharging assembly;

[0007] The lamp pole is a nested structure, including at least four sections of sleeves. In the radial direction of the lamp pole, from the outermost sleeve to the inner sleeve, the diameters of the sleeves decrease in sequence, and there is a nested gap between adjacent sleeves;

[0008] The light source assembly is fixedly arranged at the top of the innermost sleeve;

[0009] The air charging and discharging assembly is communicated with the bottom of the outermost sleeve.

[0010] Optionally, the light source assembly includes:

[0011] Lamp shade, light source and lamp base;

[0012] The lamp shade covers the outside of the light source, and the light source is installed on the lamp base;

[0013] The light source assembly further includes:

[0014] A drive circuit, a controller and a communication interface;

[0015] The drive circuit is connected to the light source, and the drive circuit is used to control the brightness of the light source by means of PWM signal or current regulation; the controller is electrically connected to the drive circuit, and the controller is used to generate a brightness adjustment instruction according to a preset brightness parameter or an external control signal; the communication interface is electrically connected to the controller, and the communication interface is used to receive a brightness adjustment instruction from the test control system, and the brightness adjustment instruction includes but is not limited to a brightness value, a dimming curve, and a scene mode parameter.

[0016] Optionally, the air charging and discharging assembly includes:

[0017] An air compressor, an air charging pipeline and a pneumatic control valve;

[0018] The pneumatic control valve is installed on the air charging pipeline. One end of the air charging pipeline is communicated with the air compressor, and the other end is communicated with the outermost sleeve. The air compressor is used to transport compressed air into the outermost sleeve to push the inner sleeve to rise in sequence.

[0019] Optionally, the air charging and discharging assembly further includes:

[0020] An air discharging pipeline and an air discharging valve;

[0021] The air discharging valve is installed on the air discharging pipeline, and the air discharging pipeline is communicated with the air charging pipeline and / or the outermost sleeve.

[0022] Optionally, the liftable street lamp for vehicle night test further includes:

[0023] A box-type base;

[0024] The air charging and discharging assembly is installed in the box-type base. A light intensity adjustment knob and a ventilation hole are provided on one side wall of the box-type base. An air charging and discharging switch and a working indicator light are provided on another side wall of the box-type base. A power supply interface and a power supply indicator light are provided on yet another side wall of the box-type base. A cable reel is provided on still another side wall of the box-type base.

[0025] Optionally, the cable reel includes:

[0026] A disk body, a rotating shaft and a retracting spring;

[0027] The disk body is rotatably arranged on the rotating shaft. One end of the retractable spring is connected to the disk body, and the other end is relatively fixed to the rotating shaft.

[0028] Optionally, the wire reel further includes:

[0029] A one-way locking mechanism;

[0030] The one-way locking mechanism is used to keep the cable at the target pay-out length.

[0031] Optionally, the one-way locking mechanism includes:

[0032] A ratchet and a pawl;

[0033] The ratchet is relatively fixed to the disk body. The pawl is rotatably arranged on the box-shaped base. When the wire reel rotates forward for pay-out, the pawl slides on the tooth surface of the ratchet. When the pay-out of the wire reel is completed and the position of the cable is fixed, the pawl falls into the tooth groove of the ratchet to prevent the ratchet from rotating in the reverse direction.

[0034] Optionally, sliding wheels are respectively arranged at the four corners of the bottom of the box-shaped base;

[0035] Among them, two of the sliding wheels are universal wheels, and two of the sliding wheels are directional wheels. The directional wheels are configured to be brakeable.

[0036] Optionally, a towing ring and a towing hook are respectively arranged at the front end and the rear end of the box-shaped base. The towing ring of one liftable street lamp for vehicle night test is used to be connected to the towing hook of another liftable street lamp for vehicle night test.

[0037] By means of the above technical solution, the present application has at least the following beneficial effects:

[0038] In the embodiment of the present application, the liftable street lamp for vehicle night test provided, by setting the lamp post as a nested structure including at least four sections of sleeves and being connected to the bottom of the outermost sleeve through an air charging and discharging assembly, realizes flexible adjustment of the height of the lamp post, and can provide lighting conditions at different heights for the ADAS system to simulate various lighting situations in the real driving environment, so as to accurately simulate various lighting situations in the real driving environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic perspective view of a liftable street lamp for vehicle night test according to an optional embodiment of the present application;

[0040] Figure 2 is a side view of a liftable street lamp for vehicle night test according to an optional embodiment of the present application.

[0041] The reference numerals are shown as follows:

[0042] 1. Lamp post; 2. Light source assembly; 3. Box-type base; 4. Light intensity adjustment knob; 5. Vent hole; 6. Inflation / deflation switch; 7. Working indicator light; 8. Power interface; 9. Power indicator light; 10. Cable reel; 11. Sliding wheel; 12. Traction hanging ring; 13. Traction hook. Detailed implementation manners

[0043] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0045] In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0046] The preferred embodiments of the present application are described below with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0047] See Figure 1 and Figure 2As shown, according to an embodiment of the present application, a liftable street lamp for automotive night testing is provided, including: a lamp post 1, a light source assembly 2, and a charging and deflating assembly; the lamp post 1 is a nested structure, including at least four sections of sleeves. In the radial direction of the lamp post 1, from the outermost sleeve to the inner sleeve, the diameters of the sleeves decrease in sequence, and there is a nested gap between adjacent sleeves; the light source assembly 2 is fixedly arranged at the top of the innermost sleeve; the charging and deflating assembly is communicated with the bottom of the outermost sleeve.

[0048] In this embodiment, by setting the lamp post 1 as a nested structure including at least four sections of sleeves and connecting the charging and deflating assembly to the bottom of the outermost sleeve, the flexible adjustment of the height of the lamp post 1 is realized, which can provide lighting conditions at different heights for the ADAS system to simulate various lighting situations in the real driving environment, so as to accurately simulate various lighting scenarios in the real driving environment.

[0049] Among them, the lamp post 1 can be cylindrical or strip-shaped, etc. When the lamp post 1 is cylindrical, each section of the sleeve is cylindrical; when the lamp post 1 is strip-shaped, each section of the sleeve is cuboid-shaped. Specifically, in this embodiment, the lamp post 1 is cylindrical.

[0050] Among them, the lamp post 1 can include four sections of sleeves, five sections of sleeves, six sections of sleeves, etc., and this embodiment does not limit this. Specifically, in this embodiment, the lamp post 1 is composed of four sections of sleeves nested with each other.

[0051] Among them, in the radial direction of the lamp post 1, that is, on the cross-section of the lamp post 1, the diameter of the outermost sleeve is the largest, and then from the outside to the inside, the diameter of each layer of sleeve becomes smaller in sequence, so that the inner sleeve can be nested inside the outer sleeve to achieve layer-by-layer nesting.

[0052] Among them, there is a certain gap between adjacent sleeves, and this gap is called the nested gap, which is used to ensure that adjacent sleeves can slide relative to each other, thus providing the possibility for the lifting of the lamp post 1.

[0053] Among them, the heights of the sleeves are different. Specifically, the closer the sleeve is to the outer layer, the higher its height, so that the higher outer sleeve can provide sufficient space for the upward movement of the inner sleeve.

[0054] Among them, a light source assembly 2 is provided at the top of the innermost sleeve, and the light source assembly 2 is used for emitting light for illumination. When the lamp post 1 lifts, the light source assembly 2 will also rise or fall accordingly to provide lighting at different heights.

[0055] Among them, the bottom of the outermost sleeve is connected to an air charging and discharging assembly, which is used to inflate or deflate the outermost sleeve to push the inner sleeve up or down. For example, when inflating the outermost sleeve, the gas pressure will cause the inner sleeve to move upward, thereby increasing the overall height of the lamp post 1; when deflating, the inner sleeve will descend under the action of gravity, and the height of the lamp post 1 will also decrease. It should be noted that in actual application scenarios, by controlling the amount of gas injected into the outermost sleeve by the air charging and discharging assembly, the height of the lamp post 1 can be continuously and accurately adjusted to provide precise lighting for testing.

[0056] In some possible embodiments disclosed in the present application, the light source assembly 2 includes: a lamp shade, a light emitting source, and a lamp holder; the lamp shade covers the outside of the light emitting source, and the light emitting source is installed on the lamp holder.

[0057] In this embodiment, the lamp shade covers the outside of the light emitting source, which can physically protect the light emitting source, prevent dust, rain, sundries, etc. from entering the inside of the light emitting source, prevent it from being polluted and damaged, thereby extending the service life of the light emitting source, ensuring the stable and reliable operation of the light emitting source, and continuously providing the lighting function. At the same time, the lamp shade can perform certain constraints, reflections, refractions, etc. on the light emitted by the light emitting source, making the light emit more concentratedly and evenly, improving the lighting efficiency and quality, better meeting the lighting requirements in different environments, and thus more accurately simulating various lighting situations in the real driving environment.

[0058] Among them, the lamp shade can be made of transparent or translucent materials such as glass, plastic, etc. Its shape can be designed into different styles according to actual needs, such as spherical, cylindrical, square, etc.

[0059] Among them, the light emitting source can be an incandescent lamp, a fluorescent lamp, an LED lamp, etc.

[0060] Among them, the lamp holder can be made of materials such as metal or plastic, and it is fixed on the top of the innermost sleeve for installing the light emitting source.

[0061] Furthermore, the light source assembly 2 further includes a drive circuit, a controller, and a communication interface; the drive circuit is connected to the light emitting source, and the drive circuit is used to control the brightness of the light emitting source by means of PWM signal or current regulation; the controller is electrically connected to the drive circuit, and the controller is used to generate a brightness adjustment instruction according to a preset brightness parameter or an external control signal; the communication interface is electrically connected to the controller, and the communication interface is used to receive a brightness adjustment instruction from the test control system, and the brightness adjustment instruction includes but is not limited to a brightness value, a dimming curve, and a scene mode parameter.

[0062] Among them, the drive circuit can convert the digital signal of the controller into a drive signal acceptable to the light emitting source, and control the brightness of the light emitting source by adjusting the duty cycle of the PWM signal or the magnitude of the current.

[0063] Among them, the controller can be a single-chip microcomputer or the like, and its built-in algorithm supports a preset brightness curve and scene mode.

[0064] Among them, the communication interface can receive instructions from an external control system to achieve remote and dynamic dimming. Here, the communication interface can receive instructions from a test control system to achieve remote and dynamic dimming.

[0065] In some possible embodiments disclosed in the present application, the air charging and discharging assembly includes: an air compressor, an air charging pipeline, and a pneumatic control valve; the pneumatic control valve is installed on the air charging pipeline, one end of the air charging pipeline is connected to the air compressor, and the other end is connected to the outermost sleeve, and the air compressor is used to transport compressed air into the outermost sleeve to push the inner sleeve to rise in sequence.

[0066] In this embodiment, by setting the air compressor, air can be compressed to generate compressed air with a certain pressure. The compressed air is transported into the outermost sleeve through the air charging pipeline, providing power for the rise of the inner sleeve. When it is necessary to raise the lamp post 1, the air compressor works, and the compressed air enters the outermost sleeve. Under the action of the gas pressure, the inner sleeve moves upward in sequence, so as to realize the overall height increase of the lamp post 1 and meet the requirements for the height of the street lamp in different scenarios, such as simulating lighting conditions at different heights for the ADAS system.

[0067] Among them, the air compressor is the power source of the air charging and discharging assembly, which is used to inhale and compress the external air to make the air have a higher pressure, so as to provide power for the lifting of the lamp post 1.

[0068] Among them, the air charging pipeline is the channel connecting the air compressor and the outermost sleeve, which is used to transport the compressed air generated by the air compressor into the outermost sleeve. In actual application scenarios, the air charging pipeline can be made of pipes with certain pressure resistance and sealing performance, such as rubber pipes, metal pipes, etc., so as to ensure that the compressed air can be effectively transmitted to the sleeve of the lamp post 1 to realize the lifting operation of the lamp post 1.

[0069] Among them, the pneumatic control valve is a device used to control the flow of compressed air in the air charging pipeline, which can accurately adjust the flow rate, pressure and on-off of the compressed air, so as to control the rising or falling speed of the lamp post 1 and stop at a specific height as required.

[0070] In some possible embodiments disclosed in the present application, the air charging and discharging assembly further includes: an air discharging pipeline and an air discharging valve; the air discharging valve is installed on the air discharging pipeline, and the air discharging pipeline is connected to the air charging pipeline and / or the outermost sleeve.

[0071] In this embodiment, the deflation pipeline and the deflation valve provide a discharge channel for the compressed air in the outermost casing. When the height of the lamp pole 1 needs to be lowered, the deflation valve is opened, and the compressed air in the outermost casing is discharged through the deflation pipeline. As the air pressure decreases, the inner casing smoothly descends under the action of gravity, thereby achieving the height adjustment of the lamp pole 1, and cooperates with the air compressor, the inflation pipeline, etc. to complete the lifting and lowering operation of the lamp pole 1.

[0072] The deflation pipeline is a channel for discharging the compressed air in the outermost casing, providing a discharge path for the compressed air, so that the air pressure in the outermost casing can be reduced, so that the inner casing can be lowered under the action of gravity, thereby reducing the height of the lamp pole 1. In actual application scenarios, the deflation pipeline can be a rubber tube, a metal tube, etc.

[0073] Among them, the bleed valve is installed on the bleed pipeline to control the on and off of the bleed pipeline and adjust the flow rate and speed of gas discharge. The bleed valve can be a manual valve, a solenoid valve, etc. When the bleed valve is a manual valve, the manual valve needs manual operation to open or close; when the bleed valve is a solenoid valve, the solenoid valve can be automatically controlled by electrical signals, which is convenient for integration with other control systems to achieve automated operation.

[0074] Among them, the deflation valve is connected in series in the middle position of the deflation pipeline. When the deflation valve is opened, the deflation pipeline is connected, and the compressed air in the outermost casing can be discharged through the deflation pipeline; when the deflation valve is closed, the deflation pipeline is cut off, preventing the compressed air from being discharged. In addition, by controlling the opening degree of the deflation valve, the flow rate of the compressed air discharge can also be adjusted, thereby controlling the descending speed of the lamp pole 1. Furthermore, in some specific examples, the deflation pipeline is connected to the inflation pipeline, and part of the structure of the inflation pipeline can be used as a deflation channel, reducing the cost and space occupied by laying additional pipelines. When deflation is required, compressed air can be discharged through the inflation pipeline and the deflation pipeline; in other specific examples, the deflation pipeline is directly connected to the outermost casing, ensuring that the deflation pipeline can directly discharge the compressed air in the outermost casing, ensuring the directness and efficiency of the deflation process; in some other specific examples, the deflation pipeline is simultaneously connected to the inflation pipeline and the outermost casing, which can not only utilize part of the structure of the inflation pipeline, but also directly discharge the compressed air from the outermost casing, increasing the flexibility and reliability of deflation.

[0075] In some possible embodiments disclosed in the present application, the liftable street lamp for nighttime testing of automobiles further includes: a box-type base 3; a charging and discharging assembly is installed in the box-type base 3, a light adjustment knob 4 and a vent 5 are provided on one side wall of the box-type base 3, a charging and discharging switch 6 and a working indicator light 7 are provided on another side wall of the box-type base 3, a power interface 8 and a power indicator light 9 are provided on another side wall of the box-type base 3, and a cable reel 10 is provided on another side wall of the box-type base 3.

[0076] In this embodiment, the air charging and discharging assembly is installed inside the box-shaped base 3, which can protect it and prevent damage to the air charging and discharging assembly caused by external environmental factors such as rain, dust, and external impact, extend its service life, and ensure the stable and reliable air charging and discharging function. At the same time, the light adjustment knob 4, the air charging and discharging switch 6, etc. are arranged on different side walls of the box-shaped base 3, realizing a clear division of the functional areas, ensuring that each operating component has its own independent spatial position, maintaining a certain distance from each other, and reducing the possibility of accidentally touching other components when operating one component. For example, when the staff adjusts the light, since the light adjustment knob 4 and the air charging and discharging switch 6 are not on the same side, the air charging and discharging switch 6 will not be accidentally touched under normal operation, thus avoiding situations such as accidental lifting or lowering of the lamp post 1 caused by accidental touch.

[0077] Among them, the box-shaped base 3 can be in the shape of a closed or semi-closed box, providing an installation and protection space carrier for some components of the entire street lamp, and being able to resist the influence of external environmental factors on the internal components.

[0078] Among them, the air charging and discharging assembly is installed inside the box-shaped base 3. The air charging and discharging assembly includes components such as an air compressor, an air charging pipeline, a pneumatic control valve, an air discharging pipeline, and an air discharging valve. These components require certain protection during operation. Placing them inside the box-shaped base 3 can avoid damage such as rain erosion, dust accumulation, and external impact, thereby ensuring that the air charging and discharging assembly can operate stably and reliably and extending its service life.

[0079] Among them, a light adjustment knob 4 and a ventilation hole 5 are arranged on one of the side walls of the box-shaped base 3, and the light adjustment knob 4 and the ventilation hole 5 are located on the same wall surface. In the actual application scenario, the light adjustment knob 4 is connected to the light source assembly 2 and is used to change the brightness, irradiation angle, or color of the light source to meet the lighting needs in different environments and scenarios. The ventilation hole 5 is connected to the internal cavity of the box-shaped base 3 and is used to promote the air circulation inside the box-shaped base 3 to ensure the normal operation of the air charging and discharging assembly.

[0080] Among them, an air charging / discharging switch 6 and a working indicator light 7 are provided on another side wall of the box-type base 3. The air charging / discharging switch 6 and the working indicator light 7 are located on the same wall surface, and this wall surface is different from the wall surface where the light intensity adjustment knob 4 and the ventilation hole 5 are located. In an actual application scenario, the air charging / discharging switch 6 is connected to the air charging / discharging assembly and is used to control the working state of the air charging / discharging assembly. When it is necessary to raise or lower the lamp post 1, the staff can operate the air charging / discharging switch 6 to start or stop the operation of the air compressor and control the opening and closing of the air release valve, thereby realizing the adjustment of the height of the lamp post 1. The working indicator light 7 is connected to the light source assembly 2 and is used to display the working state of the light source assembly 2. When the light source assembly 2 is operating normally, the working indicator light 7 may remain constantly on or flash according to a certain rule; if a fault occurs in the light source assembly 2, the working indicator light 7 may prompt the staff in different flashing modes or color changes, facilitating the timely discovery and handling of problems.

[0081] Among them, a power interface 8 and a power indicator light 9 are provided on yet another side wall of the box-type base 3. The power interface 8 and the power indicator light 9 are located on the same wall surface, and this wall surface is different from the wall surface where the air charging / discharging switch 6 and the working indicator light 7 are located, and is also different from the wall surface where the light intensity adjustment knob 4 and the ventilation hole 5 are located. In an actual application scenario, the power interface 8 is connected to an external power source and is used to obtain electrical energy from the outside to supply power to the light source assembly 2, the air charging / discharging assembly, and other related components. The power indicator light 9 is used to display the power connection and power supply state of the street lamp. When the power is normally connected and the power supply is stable, the power indicator light 9 will light up; if there are problems with the power supply, such as power outage, abnormal voltage, etc., the power indicator light 9 may go out or flash, reminding the staff to check the power connection and the power supply system.

[0082] Among them, a cable reel 10 is provided on still another side wall of the box-type base 3. The wall surface where the cable reel 10 is located is different from the wall surface where the power interface 8 and the power indicator light 9 are located, different from the wall surface where the air charging / discharging switch 6 and the working indicator light 7 are located, and is also different from the wall surface where the light intensity adjustment knob 4 and the ventilation hole 5 are located. In an actual application scenario, the cable reel 10 is used to organize and store the power cables, control cables, etc. of the street lamp, avoiding damage caused by cable entanglement, and at the same time making the environment around the street lamp cleaner and facilitating management and maintenance.

[0083] In some possible implementation embodiments disclosed in the present application, the cable reel 10 includes: a disk body, a rotating shaft, and a retracting spring; the disk body is rotatably arranged on the rotating shaft, one end of the retracting spring is connected to the disk body, and the other end is relatively fixed to the rotating shaft.

[0084] In this embodiment, one end of the retractable spring is connected to the disk body, and the other end is relatively fixed to the rotating shaft. When the disk body rotates to unwind winding objects such as wire ropes, the retractable spring will undergo elastic deformation to store elastic potential energy. When the external force disappears, the retractable spring releases the elastic potential energy, driving the disk body to rotate in the reverse direction, so that winding objects such as wire ropes are automatically rewound onto the disk body, which is convenient for storage, improves the convenience of use, and eliminates the need to manually wind the cable back one by one, saving time and effort.

[0085] Among them, the disk body can be a disk-shaped structure, which is used to provide a winding space for winding objects such as cables, so that winding objects such as cables can be wound around the circumferential surface of the disk body one by one.

[0086] Among them, the rotating shaft can be a rigid rod-shaped structure, which is used to support the wire reel 10 and provide a central axis for the disk body to rotate. In the actual application scenario, the rotating shaft is fixedly arranged on the side wall of the box-shaped base 3, and the disk body is sleeved on the rotating shaft.

[0087] Among them, a retractable spring is arranged between the disk body and the rotating shaft. One end of the rotary spring is connected to the inner wall of the disk body, and the other end is relatively fixed to the outer wall of the rotating shaft. When the disk body rotates around the rotating shaft, the retractable spring will undergo elastic deformation. Specifically, when the cable is stretched outwards, the disk body rotates clockwise (or counterclockwise), and the retractable spring is gradually tightened to store elastic potential energy; when the cable stretching stops and is released, the retractable spring releases the elastic potential energy, driving the disk body to rotate counterclockwise (or clockwise), and automatically rewinding the cable onto the disk body.

[0088] In some possible embodiments disclosed in the present application, the wire reel 10 further includes: a one-way locking mechanism; the one-way locking mechanism is used to maintain the cable at the target unwinding length.

[0089] In this embodiment, by setting the one-way locking mechanism, it is possible to prevent the cable from accidentally retracting due to external force or the action of the retractable spring, ensure that the cable always maintains the set unwinding length during use, and maintain the stability of the working state.

[0090] Among them, the one-way locking mechanism can be a clutch device, and the clutch device includes: a driving part and a driven part. The driving part is connected to the disc body, and the driven part is connected to the rotating shaft. Under normal circumstances, the driving part and the driven part can rotate relative to each other, and the wire reel 10 can freely pay out or retract the wire. When locking is required, the clutch device is actuated by mechanical or electromagnetic means or the like to connect the driving part and the driven part into a whole, thereby preventing the wire reel 10 from rotating in one direction and keeping the cable at the target length. Specifically, the electromagnetic force can be used to control the clutch device. For example, when the electromagnetic device is powered on, a magnetic field is generated, causing a magnetic attraction between the driving part and the driven part that were originally in a separated state, or causing the electromagnetic-controlled mechanical components to actuate and connect the two together, so as to achieve the purpose of preventing the wire reel 10 from rotating in one direction and keeping the cable at the required target length.

[0091] In some possible embodiments disclosed in the present application, the one-way locking mechanism includes: a ratchet and a pawl; the ratchet is relatively fixed to the disc body, and the pawl is rotatably arranged on the box-shaped base 3. When the wire reel 10 rotates forward to pay out the wire, the pawl slides on the tooth surface of the ratchet. When the wire reel 10 finishes paying out the wire and fixes the position of the cable, the pawl falls into the tooth groove of the ratchet, preventing the ratchet from rotating in the reverse direction.

[0092] Among them, when the wire reel 10 needs to rotate forward to pay out the wire, since the ratchet is relatively fixed to the disc body, the ratchet will rotate forward together with the disc body. At this time, the pawl contacts the tooth surface of the ratchet. However, since the pawl is rotatably arranged on the box-shaped base 3 and its shape and position are designed such that the pawl can smoothly slide on the tooth surface of the ratchet when the ratchet rotates forward. During this process, the pawl does not prevent the rotation of the ratchet, and thus does not affect the forward wire-paying operation of the wire reel 10. The staff can freely control the speed and length of the wire payout according to needs.

[0093] Among them, when the wire payout of the wire reel 10 reaches the required length and the position of the cable needs to be fixed, as the ratchet stops rotating forward, the pawl will fall into the tooth groove of the ratchet under the action of its own gravity, spring force or other external forces. Since the shape and size of the pawl match the tooth groove of the ratchet, once the pawl falls into the tooth groove, it will prevent the ratchet from rotating in the reverse direction. Because the ratchet is relatively fixed to the disc body, the reverse rotation of the wire reel 10 is thus prevented, thereby fixing the position of the cable and ensuring that the cable will not be accidentally retracted due to external forces or other factors, realizing the locking function of the cable position.

[0094] In some possible embodiments disclosed in the present application, sliding wheels 11 are respectively provided at the four corners of the bottom of the box-shaped base 3; among them, two sliding wheels 11 are universal wheels, and two sliding wheels 11 are directional wheels, and the directional wheels are configured to be brakeable.

[0095] In this embodiment, by providing two universal wheels, the street lamp can easily change its direction when moving. By providing two fixed wheels, the stability of the street lamp during straight-line movement can be ensured; at the same time, the two fixed wheels can be braked so that the street lamp can be quickly fixed after reaching the designated position.

[0096] Among them, the two sliding wheels 11 on one side of the forward direction of the box-type base 3 are universal wheels, and the two sliding wheels 11 on the other side are brakeable fixed wheels.

[0097] Among them, a brake pad is installed on the fixed wheel. The brake pad is used to contact the rim or hub surface of the fixed wheel, and the frictional force is used to prevent the fixed wheel from rotating, thereby achieving braking.

[0098] In some possible embodiments disclosed in the present application, a towing ring 12 and a towing hook 13 are respectively provided at the front end and the rear end of the box-type base 3. The towing ring 12 of a liftable street lamp for night-time vehicle testing is used to connect with the towing hook 13 of another liftable street lamp for night-time vehicle testing.

[0099] In this embodiment, through the cooperation of the towing ring 12 and the towing hook 13, multiple liftable street lamps for night-time vehicle testing can be conveniently connected. Towing equipment such as a vehicle can tow multiple street lamps at one time for movement, improving the efficiency of transferring the street lamps between different construction sites or storage locations. Compared with transporting single street lamps separately, it greatly saves manpower, material resources and time.

[0100] Among them, the towing ring 12 is located on the forward direction side of the box-type base 3, and the towing hook 13 is located on the other side of the box-type base 3.

[0101] Among them, the towing ring 12 can be a ring structure made of metal material, used to connect with towing equipment such as a vehicle or the towing hook 13; the towing hook 13 can be a hook shape made of metal material, having a certain arc and opening, and can hook the towing ring 12. In actual application scenarios, a tow truck or other towing equipment can be used to hook the towing hook 13 of the first street lamp, and then drive a series of subsequent street lamps to move together through the connected towing ring 12 and towing hook 13, achieving the purpose of quickly arranging or transferring the street lamps.

[0102] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0103] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and variations can also be made, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A liftable street lamp for automotive night tests, characterized in that, Comprising: A lamp post, a light source assembly, and a gas charging and discharging assembly; The lamp post is of a nested structure, including at least four sections of sleeves. In the radial direction of the lamp post, from the outermost sleeve to the inner sleeves, the diameters of the sleeves decrease in sequence, and there is a nested gap between adjacent sleeves; The light source assembly is fixedly arranged at the top of the innermost sleeve; The gas charging and discharging assembly is communicated with the bottom of the outermost sleeve.

2. The liftable street lamp for automotive night tests according to claim 1, characterized in that, The light source assembly includes: A lampshade, a light-emitting source, and a lamp holder; The lampshade covers the outside of the light-emitting source, and the light-emitting source is installed on the lamp holder; The light source assembly further includes: A drive circuit, a controller, and a communication interface; The drive circuit is connected to the light-emitting source, and the drive circuit is used to control the brightness of the light-emitting source by means of PWM signal or current regulation; the controller is electrically connected to the drive circuit, and the controller is used to generate a brightness adjustment instruction according to a preset brightness parameter or an external control signal; the communication interface is electrically connected to the controller, and the communication interface is used to receive a brightness adjustment instruction from a test control system, and the brightness adjustment instruction includes but is not limited to a brightness value, a dimming curve, and a scene mode parameter.

3. The liftable street lamp for vehicle night test according to claim 1, wherein The gas charging and discharging assembly includes: An air compressor, a gas charging pipeline, and a pneumatic control valve; The pneumatic control valve is installed on the gas charging pipeline. One end of the gas charging pipeline is communicated with the air compressor, and the other end is communicated with the outermost sleeve. The air compressor is used to transport compressed air into the outermost sleeve to push the inner sleeves to rise in sequence.

4. The liftable street lamp for automotive night tests according to claim 3, wherein The gas charging and discharging assembly further includes: A gas discharging pipeline and a gas discharging valve; The gas discharging valve is installed on the gas discharging pipeline, and the gas discharging pipeline is communicated with the gas charging pipeline and / or the outermost sleeve.

5. The liftable street lamp for automotive night tests according to claim 1, characterized in that, Further comprising: A box-type base; The gas charging and discharging assembly is installed in the box-type base. A light intensity adjustment knob and a ventilation hole are provided on one side wall of the box-type base, a gas charging and discharging switch and a working indicator light are provided on another side wall of the box-type base, a power supply interface and a power supply indicator light are provided on yet another side wall of the box-type base, and a cable reel is provided on still another side wall of the box-type base.

6. The liftable street lamp for automotive night tests according to claim 5, characterized in that, The cable reel includes: A reel body, a rotating shaft, and a retracting spring; The reel body is rotatably arranged on the rotating shaft. One end of the retracting spring is connected to the reel body, and the other end is relatively fixed to the rotating shaft.

7. The liftable street lamp for automotive night tests according to claim 6, wherein, The cable reel further includes: A one-way locking mechanism; The one-way locking mechanism is used to keep the cable at a target pay-out length.

8. The liftable street lamp for automotive night test according to claim 7, wherein The one-way locking mechanism includes: A ratchet wheel and a pawl; The ratchet wheel is relatively fixed to the reel body, and the pawl is rotatably arranged on the box-type base. When the cable reel rotates forward to pay out the cable, the pawl slides on the tooth surface of the ratchet wheel. When the cable pay-out is completed and the cable position is fixed, the pawl falls into the tooth groove of the ratchet wheel to prevent the ratchet wheel from rotating reversely.

9. The liftable street lamp for vehicle night test according to claim 5, wherein Sliding wheels are respectively provided at the four corners of the bottom of the box-type base; Among them, the two sliding wheels are universal wheels, the two sliding wheels are fixed wheels, and the fixed wheels are configured to be brakeable.

10. The liftable street lamp for vehicle night test according to claim 9, wherein A towing ring and a towing hook are respectively provided at the front end and the rear end of the box-shaped base, and the towing ring of one liftable street lamp for vehicle night test is used to connect with the towing hook of another liftable street lamp for vehicle night test.

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