CN117405364A

CN117405364A - Road testing method and system for intelligent head lamp of automobile

Info

Publication number: CN117405364A
Application number: CN202311703659.9A
Authority: CN
Inventors: 赵准; 栗晋杰; 赵斌; 赵帅; 邹博维; 杜天强; 陈澎; 姜国凯; 毕腾飞; 张世琦; 宁洋; 董帅; 张起朋; 姬馨玉; 田喆; 王诗萌
Original assignee: CATARC Automotive Test Center Tianjin Co Ltd
Current assignee: CATARC Automotive Test Center Tianjin Co Ltd
Priority date: 2023-12-13
Filing date: 2023-12-13
Publication date: 2024-01-16

Abstract

The invention relates to the field of vehicle testing, and discloses a method and a system for testing an intelligent headlamp road of an automobile, wherein the method comprises the following steps: determining an illuminance receiving device according to the motion direction of a tested vehicle of the automobile intelligent headlamp road test system relative to an excited vehicle of the automobile intelligent headlamp road test system; under the condition that a lighting system of a vehicle is excited to emit target lights, acquiring the illumination intensity acquired by an illumination receiving device and the illumination intensity acquired by a plurality of shielding width illumination sensors of an intelligent headlamp road test system in real time; according to the change condition of the illumination intensity collected by the illumination receiving device, the excitation time of the intelligent head lamp mounted on the tested vehicle is determined, and according to the change condition of the illumination intensity collected by the plurality of shielding width illumination sensors, the shielding width of the intelligent head lamp is determined. The invention recognizes the self-adaptive state excitation of the intelligent headlamp and accurately tests and acquires the excitation time and the shielding width of the intelligent headlamp.

Description

Road testing method and system for intelligent head lamp of automobile

Technical Field

The invention relates to the technical field of automobile testing, in particular to an automobile intelligent headlamp road testing method and system.

Background

The automobile headlamp is an important component related to the running safety of the automobile, and the technical progress not only enables the light source of the automobile headlamp to gradually transition from a halogen lamp and a xenon lamp to an LED with better illumination intensity and longer service life. Meanwhile, with the continuous maturation and application of the front-edge technologies such as machine vision, multi-mode interaction sensors, matrix LED light source modules and the like, intelligent headlamps of automobiles, such as self-adaptive high beam systems (Adaptive Driving Beam, ADB) and the like, are generated so as to meet the demands of people on intelligent driving illumination functions.

However, if the vehicle cannot effectively identify the opposite vehicle and successfully excite the self-adaptive state in the driving interaction process, or if the excitation speed is too slow, the problems of too wide shielding area and the like all cause serious influence on driving safety, so that the vehicle provided with the intelligent headlamp generates new potential safety hazards and risks during driving. Therefore, it is necessary to perform a reasonable road performance test on the intelligent head lamp of the vehicle.

In view of this, the present invention has been made.

Disclosure of Invention

In order to solve the technical problems, the invention provides a road test method and a road test system for an intelligent head lamp of an automobile, which are used for identifying the self-adaptive state excitation of the intelligent head lamp of a tested automobile and accurately testing and acquiring the excitation time and the shielding width of the intelligent head lamp.

The embodiment of the invention provides an automobile intelligent headlamp road test method, which is applied to an analysis device of an automobile intelligent headlamp road test system, and comprises the following steps:

determining an illuminance receiving device according to the motion direction of a tested vehicle of the intelligent automobile headlamp road test system relative to an excited vehicle of the intelligent automobile headlamp road test system; wherein the excited vehicle is parked at a preset parking position of the road; the illumination receiving device is an eye-point illumination sensor of a driver or an in-vehicle rearview mirror on the excited vehicle;

under the condition that the light system of the excited vehicle emits target light, acquiring the illumination intensity acquired by the illumination receiving device and the illumination intensities acquired by a plurality of shielding width illumination sensors of the intelligent automobile headlamp road test system in real time; wherein the lamplight system is a standard headlamp system or a standard rear-position lamp system;

according to the change condition of the illumination intensity collected by the illumination receiving device, the excitation time of the intelligent head lamp mounted on the tested vehicle is determined, and according to the change condition of the illumination intensity collected by the plurality of shielding width illumination sensors, the shielding width of the intelligent head lamp is determined.

The embodiment of the invention provides an intelligent automobile headlamp road test system, which comprises: the system comprises an excitation vehicle, a tested vehicle, a 5G base station, a distance triggering device, a plurality of shielding width illuminance sensors and an analysis device; wherein,

the exciting vehicle is an M1 type passenger vehicle after transformation and is parked at a preset parking position of a road, a standard headlamp system, a standard rear-view lamp system, a driver eye-point illuminance sensor and an inner rearview mirror eye-point illuminance sensor are mounted on the exciting vehicle, the standard headlamp system is used for emitting headlamp light to the front of the exciting vehicle, rear-view light is emitted to the rear of the exciting vehicle, the driver eye-point illuminance sensor is used for obtaining the illumination intensity of the front of the exciting vehicle, and the inner rearview mirror eye-point illuminance sensor is used for obtaining the illumination intensity of the rear of the exciting vehicle;

the intelligent head lamp is used for adjusting the brightness of the intelligent head lamp when receiving the front lighting light or the rear lighting light emitted by the excited vehicle;

the distance triggering device is arranged at a position with a target distance from the excited vehicle, and is used for sending a triggering signal to the 5G base station when the detected vehicle is detected to travel to the position of the distance triggering device at a target speed, so that the triggering signal is forwarded to the excited vehicle through the 5G base station, and the excited vehicle sends out the headlamp light or the rear-position light when receiving the triggering signal;

The 5G base station is respectively in communication connection with the distance triggering device and the excited vehicle, and is used for receiving a triggering signal sent by the distance triggering device and forwarding the triggering signal to the excited vehicle;

the shielding width illuminance sensors are arranged on the road and are sequentially arranged on two sides of the excited vehicle according to preset distances and are used for receiving the illumination intensity at each preset position in real time;

the analysis device is used for executing the road test method of the intelligent automobile headlamp according to any embodiment.

The embodiment of the invention has the following technical effects:

the illumination receiving device is determined according to the moving direction of the tested vehicle of the automobile intelligent headlamp road test system relative to the excited vehicle of the automobile intelligent headlamp road test system, so that whether the intelligent headlamp mounted on the tested vehicle is excited or not and the excitation time and the shielding width under the excitation condition can be judged through the illumination receiving device, furthermore, under the condition that the lamplight system of the excited vehicle emits target lamplight, the illumination intensity collected by the illumination receiving device and the illumination intensities collected by a plurality of shielding width illumination sensors of the automobile intelligent headlamp road test system are obtained in real time, the excitation time of the intelligent headlamp mounted on the tested vehicle is determined according to the change condition of the illumination intensity collected by the illumination receiving device, and the shielding width of the intelligent headlamp is determined according to the change condition of the illumination intensity collected by the plurality of shielding width illumination sensors, so that the intelligent headlamp of the tested vehicle can be identified through the excitation of the road test under the self-adaptive state, and the excitation time and the shielding width effect of the intelligent headlamp can be accurately tested and obtained.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for testing an intelligent headlamp road of an automobile, which is provided by an embodiment of the invention;

fig. 2 is a schematic structural diagram of an intelligent automotive headlamp road test system according to an embodiment of the present invention;

fig. 3 is a schematic view of the arrangement positions of a driver's eye point illuminance sensor and an inside rear view mirror eye point illuminance sensor provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a 5G base station according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a distance triggering device according to an embodiment of the present invention sensing the vehicle under test.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.

The road test method for the intelligent automotive headlamp provided by the embodiment of the invention is mainly suitable for testing whether the intelligent automotive headlamp can be excited or not through self-adaptive adjustment and testing the excitation time and the shielding width after excitation. The road test of the intelligent automobile headlamp provided by the embodiment of the invention can be executed by an analysis device of the road test system of the intelligent automobile headlamp.

The intelligent headlamp is used as an interactive system, and by using sensor technologies such as camera sensing and radar sensing, information such as surrounding environment, weather, speed and relative positions of other vehicles is collected, and after being processed by a vehicle central processing and control system, the intelligent headlamp automatically and independently controls the opening and working current of each pixel point in the multi-pixel integrated LED light source, so that the light beam irradiation range, shape, light intensity, angle and cut-off line position are changed, and the purpose of various intelligent driving lighting functions is achieved. For example, when other road users exist in the driving vision (such as car following or meeting), the intelligent headlamp can automatically capture the positions of the other road users, and the pixel points of the LEDs at the corresponding positions are dimmed or extinguished, so that the glare influence on the other road users is avoided, the driving safety of the road is ensured, the vision illumination is also enlarged, and the driving safety is ensured.

The intelligent head lamp can be excited only under certain vehicle speed conditions, dark environment and driving interaction (such as following or meeting). The intelligent headlamp automatically activates the high beam under the conditions of meeting the vehicle speed and dark environment, but when the vehicle is in interaction, the front target vehicle is found, the self-adaptive state is excited, the driver's eye point or rearview mirror area of the front vehicle is shielded, and the purpose of avoiding glare is achieved. Therefore, tests are required to be performed on the performance of the intelligent headlamp, such as whether the self-adaptive state of the intelligent headlamp can be successfully excited in the running interaction process, whether excitation is completed in the specified vehicle distance, the switching speed when the high beam is switched to the self-adaptive light type, the width of a shielding area and the like. If the vehicle can not effectively identify the opposite vehicle and successfully excite the opposite vehicle in the driving interaction process, or the excitation speed is too slow, the problems of too wide shielding area and the like can cause serious influence on driving safety, and the vehicle provided with the intelligent headlamp can generate new potential safety hazards and risks during driving. Therefore, it is necessary to perform a road performance test with respect to the above key indexes of the intelligent head lamp, so as to ensure that the application of the intelligent head lamp on a vehicle is safe and reliable.

Fig. 1 is a flowchart of a road testing method for an intelligent headlamp of an automobile according to an embodiment of the present invention. Referring to fig. 1, the method for testing the road of the intelligent headlamp of the automobile specifically comprises the following steps:

s110, determining the illuminance receiving device according to the movement direction of the tested vehicle of the automobile intelligent head lamp road test system relative to the excited vehicle of the automobile intelligent head lamp road test system.

The intelligent headlamp road test system for the automobile is a system for testing intelligent headlamps on a tested vehicle, and the specific test direction comprises: whether the self-adaptive state can be successfully excited in the running interaction process, whether excitation is completed in the specified vehicle distance, the switching speed when switching to the self-adaptive light type, the width of a shielding area and the like. The vehicle to be tested is a traveling vehicle carrying an intelligent headlamp to be tested. The vehicle is activated to park in a preset parking position on the road. The excited vehicle is a vehicle for triggering the intelligent headlamp excitation adaptive state of the tested vehicle. The illumination receiving device is used for exciting an illumination sensor of an eye point of a driver or an illumination sensor of an eye point of a rearview mirror in a vehicle, and is used for judging whether the illumination intensity in the head direction of the excited vehicle or the illumination intensity in the tail direction of the excited vehicle is changed or not. The moving direction of the tested vehicle relative to the excited vehicle comprises the same direction, namely, the moving direction of the tested vehicle is the same as the head direction of the excited vehicle, and the tested vehicle is in the tail direction of the excited vehicle, or the opposite direction, namely, the moving direction of the tested vehicle is opposite to the head direction of the excited vehicle, and the tested vehicle is in the head direction of the excited vehicle.

Specifically, according to the movement direction of the tested vehicle relative to the excited vehicle, the light direction of the intelligent headlamp of the tested vehicle can be determined to be towards the driver eye point illuminance sensor (for receiving light from the head direction of the excited vehicle) or the inside rearview mirror eye point illuminance sensor (for receiving light from the tail direction of the excited vehicle) on the excited vehicle, namely, the currently tested illuminance receiving device is determined, so that the analysis on the change of the illumination intensity received by the driver eye point illuminance sensor or the inside rearview mirror eye point illuminance sensor is facilitated.

On the basis of the above example, the illuminance receiving apparatus may be determined according to the movement direction of the vehicle under test of the vehicle intelligent head lamp road test system with respect to the excited vehicle of the vehicle intelligent head lamp road test system by:

if the moving direction of the tested vehicle relative to the excited vehicle is that the moving direction of the tested vehicle is the same as the head direction of the excited vehicle and the tested vehicle is in the tail direction of the excited vehicle, determining that the illuminance receiving device is an in-vehicle rearview mirror eye point illuminance sensor;

if the moving direction of the tested vehicle relative to the excited vehicle is that the moving direction of the tested vehicle is opposite to the head direction of the excited vehicle and the tested vehicle is in the head direction of the excited vehicle, the illuminance receiving device is determined to be the driver eye point illuminance sensor.

The method comprises the steps that a standard headlamp system of an excited vehicle is started when a headlamp trigger signal is received, the headlamp trigger signal is formed by a first distance trigger device which is arranged on a road and located at a first distance in the direction of the head of the excited vehicle, and when the detected vehicle is detected to travel to the position of the first distance trigger device at a target speed, the headlamp trigger signal is sent to a 5G base station of an intelligent headlamp road test system of the automobile so as to forward the headlamp trigger signal to the excited vehicle through the 5G base station; the standard rear-end lamp system of the excited vehicle is started when receiving a rear-end lamp trigger signal, the rear-end lamp trigger signal is transmitted to the excited vehicle through a 5G base station by a second distance trigger device which is arranged on a road and located at a second distance in the tail direction of the excited vehicle, and when the detected vehicle runs to the position of the second distance trigger device at a target speed, the rear-end lamp trigger signal is transmitted to the 5G base station. The headlight triggering signal is a signal which is emitted by the first distance triggering device and is used for triggering the starting of a standard headlight system of the excited vehicle through a 5G network. The rear lamp triggering signal is sent by the second distance triggering device and is used for triggering a signal for triggering the starting of a standard rear lamp system of the vehicle through a 5G network. The standard headlamp system and the standard rear-position lamp system are modified, so that the intelligent headlamp light system of the tested vehicle can be conveniently and effectively excited. The first distance triggering device and the second distance triggering device may be laser type object detection sensors, such as infrared sensors. The first distance and the second distance are pre-calibrated distances. The 5G base station is a communication system for constructing a 5G network environment and communication transmission.

The first distance triggering device and the second distance triggering device can be powered by DC24V safe voltage, and the built-in power supply reverse connection protection, power supply surge protection, output overcurrent protection, output surge protection and output reverse connection protection have the temperature range of-20 to +50deg.C (no freezing), the humidity range of 35 to 85% RH (no condensation) and the shock resistance of 1000m/s ² X, Y, Z direction 6 times each, 7ms response time. In this case, the response distance is about 0.117 meters when the vehicle under test passes through the first distance triggering device and the second distance triggering device at a speed of 60 km/h.

Illustratively, the first distance is 400m and the second distance is 100m. Parking the excited vehicle on a road, arranging a first distance triggering device at 400m in the head direction of the excited vehicle for the test that the moving direction of the detected vehicle relative to the excited vehicle is the traveling direction of the detected vehicle opposite to the head direction of the excited vehicle, and placing the detected vehicle in the center of an opposite adjacent lane except at least 500m (the sum of the first distance and a preset starting distance) in the head direction of the excited vehicle at the moment, so that the detected vehicle can travel to the first distance triggering device at a speed of not less than 60km/h (target speed), the first distance triggering device sends a head lamp triggering signal to a 5G base station through a 5G network, and the detected vehicle is forwarded to the excited vehicle through the 5G base station, so that the excited vehicle starts a standard head lamp system; for the test that the moving direction of the tested vehicle relative to the excited vehicle is that the moving direction of the tested vehicle is the same as the head direction of the excited vehicle and the tested vehicle is in the tail direction of the excited vehicle, a second distance triggering device is arranged at the position 100m away from the excited vehicle in the tail direction, at this time, the tested vehicle is placed in the center of the same opposite lane except for at least 200m (the sum of the second distance and the preset starting distance) away from the excited vehicle in the tail direction, so that the tested vehicle can conveniently drive to the second distance triggering device at the speed of not lower than 60km/h, the second distance triggering device sends a rear-end lamp triggering signal to a 5G base station through a 5G network, and then the second distance triggering device is forwarded to the excited vehicle through the 5G base station, so that the excited vehicle starts a standard rear-end lamp system.

Specifically, depending on the direction of movement of the vehicle under test relative to the energized vehicle, it may be determined whether the intelligent headlamp excitation adaptive state of the vehicle under test is energized by energizing a standard headlamp system or a standard rear-end lamp system on the vehicle. Further, if the moving direction of the measured vehicle relative to the excited vehicle is that the moving direction of the measured vehicle is the same as the head direction of the excited vehicle and the measured vehicle is in the tail direction of the excited vehicle, the measured vehicle and the excited vehicle are determined to be in the same direction, the measured vehicle is simulated to follow the excited vehicle, and at this time, the intelligent headlamp of the measured vehicle can influence the inside rearview mirror eyepoint illuminance sensor, so that the illuminance receiving device is determined to be the inside rearview mirror eyepoint illuminance sensor. If the moving direction of the detected vehicle relative to the excited vehicle is that the moving direction of the detected vehicle is opposite to the head direction of the excited vehicle and the detected vehicle is in the head direction of the excited vehicle, the detected vehicle is determined to face the excited vehicle, the detected vehicle and the excited vehicle are simulated to run in opposite directions, and at the moment, the intelligent front lighting lamp of the detected vehicle can influence the driver's eye point illuminance sensor, so that the illuminance receiving device is determined to be the driver's eye point illuminance sensor.

S120, under the condition that a lamplight system of the vehicle is excited to emit target lamplight, the illumination intensity collected by the illumination receiving device and the illumination intensity collected by a plurality of shielding width illumination sensors of the intelligent automobile headlamp road test system are obtained in real time.

Wherein, the lighting system is a standard headlamp system or a standard rear-position lamp system. The target lamp light is the light emitted by the light system and is used for exciting the intelligent head lamp of the tested vehicle to carry out self-adaptive adjustment of the light. The main body of the excitation vehicle is an M1 type passenger vehicle after being modified, and the excitation vehicle can be provided with a power system, an electric power system, a braking/parking and steering system and the like. Energizing a head light system (low beam), a rear light system (tail light) of a vehicle to a custom retrofit, i.e., a light system comprising: standard headlamp systems and standard rear lamp systems. The switches for activating the standard headlight (low beam) system and the standard rear lamp (tail lamp) system of the vehicle are designed in a program-controlled way and a circuit signal feedback channel is reserved. The plurality of shielding width illuminance sensors are a plurality of illuminance sensors which are arranged according to a preset distance, are transversely arranged on two sides of the driver's eye point illuminance sensor for exciting the vehicle and are used for detecting the shielding width of the intelligent headlamp of the tested vehicle.

Exemplary, specific requirements for the optical performance of the standard headlamp system and the standard rear lamp system, and requirements for the mounting pitch and mounting height are as follows: the light source of the standard headlamp system is a halogen lamp, the ground mounting height of the halogen lamp is 750mm, the optical center distance between the left halogen lamp and the right halogen lamp is 1500mm, and the aperture area of the light outlet is 80cm ² The illuminance generated at each point and each region specified by the current standard for the relevant headlamp should be not more than 80% of the specified maximum limit. The standard rear lamp system has incandescent lamp as light source and has high installation height750mm, the optical center distance between the left incandescent lamp and the right incandescent lamp is 1500mm, and the aperture area of light emergent light is 50cm ² And can emit light in a uniform manner in a cone angle larger than +/-25 degrees, the upper limit of the luminous intensity in the area is not larger than 7cd, and the lower limit of the luminous intensity meets the light distribution performance requirement of the rear lamp specified by the current national standard. The plurality of shade width illuminance sensors are on the same horizontal plane as the front-rear position and the up-down position of the driver's eye point illuminance sensor, and the lateral positions are arranged at a predetermined distance, for example, 1.75m (half lane width). Each shielding width illuminance sensor can be designed with a corresponding fixing device and a position and angle adjusting device.

Specifically, under the condition that the light system of the excited vehicle emits target light, the illumination intensity collected by the illumination receiving device is obtained in real time so as to judge whether the intelligent head lamp of the detected vehicle carries out self-adaptive adjustment of the light, if so, the excitation time can be further determined, and the illumination intensity collected by each shielding width illumination sensor is obtained in real time so as to judge the width of the intelligent head lamp of the detected vehicle, namely the shielding width, of the light change in the transverse direction of the excited vehicle.

S130, determining the excitation time of the intelligent head lamp mounted on the tested vehicle according to the change condition of the illumination intensity acquired by the illumination receiving device, and determining the shielding width of the intelligent head lamp according to the change condition of the illumination intensity acquired by the plurality of shielding width illumination sensors.

The excitation time is the time from the starting of a lamplight system of the excited vehicle to the self-adaptive adjustment of lamplight of the intelligent headlamp on the tested vehicle. The shielding width is the road width influenced by the light self-adaptive adjustment of the intelligent headlamp on the tested vehicle.

Specifically, when the lighting system is started, the lighting intensity collected by the lighting receiving device starts to be recorded, if the lighting intensity is weakened, the intelligent head lamp on the tested vehicle is self-adaptively adjusted for exciting the vehicle, so that the change condition of the lighting intensity collected by the lighting receiving device is analyzed, the starting time of the lighting system and the time when the lighting intensity is weakened are determined, and further, the excitation time of the intelligent head lamp mounted on the tested vehicle can be obtained. If the condition that the illumination intensity acquired by the illumination receiving device is weakened does not exist, the intelligent headlamp is not excited, and the subsequent excitation time and the shielding width are not required to be determined. And determining each illumination sensor with illumination emphasis changed reversely according to the change condition of illumination intensity acquired by the plurality of illumination sensors with shielding width, and determining the shielding width of the intelligent headlamp according to the distance between the illumination sensors.

On the basis of the above example, the excitation time of the intelligent headlamp mounted on the vehicle under test can be determined according to the change condition of the illumination intensity acquired by the illumination receiving device by the following manner:

determining the starting time of a lighting system;

determining the inflection point moment of the illumination intensity according to the change condition of the illumination intensity acquired by the illumination receiving device;

and determining the difference between the inflection point moment and the starting moment of the illumination intensity as the excitation time of the intelligent headlamp mounted on the tested vehicle.

The starting time may be a time when the exciting vehicle receives the headlight trigger signal or the rear lamp trigger signal, or may be a time when the current fed back by the standard headlight system or the standard rear lamp system of the exciting vehicle changes. The illumination intensity inflection point time is a time when the illumination intensity starts to become smaller in the illumination intensity acquired by the illumination receiving device.

Specifically, the time when the headlight trigger signal or the rear-end light trigger signal is received by the excited vehicle is taken as the starting time of the lamplight system, or the time when the current fed back by the standard headlight system or the standard rear-end light system of the excited vehicle changes is taken as the starting time of the lamplight system. Analyzing the change condition of the illumination intensity collected by the illumination receiving device, if the intelligent head lamp of the tested vehicle is not excited, the illumination intensity collected by the illumination receiving device cannot be reduced, if the intelligent head lamp of the tested vehicle is excited, the illumination intensity collected by the illumination receiving device can be reduced, and the moment when the illumination intensity is reduced is taken as the moment of inflection point of the illumination intensity. Further, the difference between the inflection point time of the illumination intensity and the on time is used as the excitation time of the intelligent headlamp mounted on the vehicle to be tested.

Illustratively, for oncoming vehicle testing: driving the tested vehicle forward, ensuring that the vehicle speed is not lower than the target vehicle speed (such as 60 km/h) when the tested vehicle is at a first distance (such as 400 m) from the excited vehicle, transmitting a headlamp trigger signal to the excited vehicle through a 5G base station by a first distance triggering device through a 5G network when the tested vehicle is detected, enabling the excited vehicle to light with a standard headlamp system with specified current or voltage, and recording the lighting time (starting moment) of the lamp as t ₀ . If the illuminance receiving device on the excited vehicle detects the change of the light intensity of the head lamp of the detected vehicle, the intelligent head lamp system is proved to be excited, and the illuminance change time (the moment of inflection point of the illuminance) is recorded as t ₁ Excitation time t=t ₁ -t ₀ . If the illuminance receiving device on the excited vehicle does not detect the change of the light intensity of the head lamp of the detected vehicle, the intelligent head lamp system is proved to be failed to be excited. For the test of following the front vehicle, driving the tested vehicle to move forward, ensuring that the vehicle speed is not lower than the target vehicle speed (such as 60 km/h) when the tested vehicle is at a second distance (such as 100 m) from the excited vehicle, transmitting a rear-end lamp trigger signal to the excited vehicle through a 5G base station by a second distance triggering device when the tested vehicle is detected through a 5G network, enabling the excited vehicle to light a standard rear-end lamp system with specified current or voltage, and recording the lighting time (starting moment) of the lamp as t ₀ . If the illuminance receiving device on the excited vehicle detects the change of the light intensity of the head lamp of the detected vehicle, the intelligent head lamp system is proved to be excited, and the illuminance change time (the moment of inflection point of the illuminance) is recorded as t ₁ Excitation time t=t ₁ -t ₀ . If the illuminance receiving device on the excited vehicle does not detect the change of the light intensity of the head lamp of the detected vehicle, the intelligent head lamp system is proved to be failed to be excited.

On the basis of the above example, the shade width of the intelligent headlamp can be determined according to the change condition of the illumination intensity collected by the plurality of shade width illumination sensors by the following method:

according to the change condition of illumination intensity acquired by each shielding width illumination sensor, each target illumination sensor with an inflection point of illumination intensity is determined;

the distance between two target illuminance sensors located at the edge of each target illuminance sensor is determined as the shielding width of the intelligent headlamp.

Wherein, the existence of the inflection point of the illumination intensity is a condition that the illumination intensity is changed from rising to falling. The target illuminance sensor is a shading width illuminance sensor in the width affected by the self-adaptive adjustment of the intelligent headlamp of the vehicle to be tested.

Specifically, the change condition of the illumination intensity collected by each shielding width illumination sensor is analyzed, whether the illumination intensity has an inflection point is judged, and if the inflection point exists, the shielding width illumination sensor is taken as a target illumination sensor. After the target illuminance sensors are determined, the distance between the two target illuminance sensors farthest away is used as the shielding width of the intelligent headlamp. The distance between any two target illuminance sensors may be determined, and the maximum value of the distances may be used as the shielding width of the intelligent headlamp.

Illustratively, the distance between any two adjacent shielding width illuminance sensors on the left side of the excited vehicle is the width of one half lane, the distance between any two adjacent shielding width illuminance sensors on the right side is the width of one half lane, and the distance between the excited vehicle and the nearest shielding width illuminance sensor on the left and right sides is the width of one half lane. If the illumination sensors of the shielding widths of the lanes at the two sides of the lane where the excited vehicle is located do not detect the light intensity change of the head lamps of the detected vehicle, the shielding width is smaller than 1 lane. If the light intensity changes of the headlamps of the detected vehicle are detected by the shielding width illuminance sensors in the lanes at the two sides of the lane where the excited vehicle is located, and the light intensity changes of the headlamps of the detected vehicle are not detected by the shielding width illuminance sensors in the two lanes adjacent to the outer sides of the lanes at the two sides, the shielding width is larger than or equal to 1 lane and smaller than 2 lanes, and if the light intensity changes of the headlamps of the detected vehicle are detected by the shielding width illuminance sensors in the two lanes adjacent to the outer sides of the lanes at the two sides, the shielding width is larger than or equal to 2 lanes.

By the method, objective evaluation tests based on roads can be carried out aiming at main technical indexes of the intelligent head lamps of the tested vehicles, the test repeatability can be ensured, the tests are easy to implement, the evaluation feasibility, the effectiveness and the repeatability of the road tests of the intelligent head lamps of the automobiles are ensured, and the real and reliable data results of the test evaluation are further ensured.

The embodiment has the following technical effects: the illumination receiving device is determined according to the moving direction of the tested vehicle of the automobile intelligent headlamp road test system relative to the excited vehicle of the automobile intelligent headlamp road test system, so that whether the intelligent headlamp mounted on the tested vehicle is excited or not and the excitation time and the shielding width under the excitation condition can be judged through the illumination receiving device, furthermore, under the condition that the lamplight system of the excited vehicle emits target lamplight, the illumination intensity collected by the illumination receiving device and the illumination intensities collected by a plurality of shielding width illumination sensors of the automobile intelligent headlamp road test system are obtained in real time, the excitation time of the intelligent headlamp mounted on the tested vehicle is determined according to the change condition of the illumination intensity collected by the illumination receiving device, and the shielding width of the intelligent headlamp is determined according to the change condition of the illumination intensity collected by the plurality of shielding width illumination sensors, so that the intelligent headlamp of the tested vehicle can be identified through the excitation of the road test under the self-adaptive state, and the excitation time and the shielding width effect of the intelligent headlamp can be accurately tested and obtained.

Fig. 2 is a schematic structural diagram of an intelligent automotive headlamp road test system according to an embodiment of the present invention. Referring to fig. 2, the intelligent automotive headlamp road test system specifically includes: the system comprises an excitation vehicle 210, a vehicle under test 220, a 5G base station 230, a distance triggering device 240, a plurality of shade width illuminance sensors 250, and an analysis device 260.

The exciting vehicle 210 is a modified M1-class passenger vehicle, and is parked at a preset parking position of a road, the exciting vehicle 210 is provided with a standard headlamp system 211, a standard rear-view lamp system 212, a driver's eye-point illuminance sensor 213 and an interior rear-view mirror eye-point illuminance sensor 214, the standard headlamp system 211 is used for emitting front-view light to the front of the exciting vehicle 210, the standard rear-view lamp system 212 is used for emitting rear-view light to the rear of the exciting vehicle 210, the driver's eye-point illuminance sensor 213 is used for obtaining the illumination intensity of the front of the exciting vehicle 210, and the interior rear-view mirror eye-point illuminance sensor 214 is used for obtaining the illumination intensity of the rear of the exciting vehicle 210;

the intelligent head lamp 221 is mounted on the tested vehicle 220, and the intelligent head lamp 221 is used for adjusting the brightness of the intelligent head lamp 221 when receiving the front lighting light or the rear lighting light emitted by the excited vehicle 210;

A distance triggering device 240, disposed at a position at a target distance from the excited vehicle 210, for sending a trigger signal to the 5G base station 230 when it is detected that the vehicle 220 to be tested is traveling at a target speed to the position of the distance triggering device 240, so as to forward the trigger signal to the excited vehicle 210 through the 5G base station 230, and when the excited vehicle 210 receives the trigger signal, sending a headlight light or a rear-end light;

the 5G base station 230 is respectively in communication connection with the distance triggering device 240 and the excited vehicle 210, and is configured to receive a trigger signal sent by the distance triggering device 240 and forward the trigger signal to the excited vehicle 210;

a plurality of shielding width illuminance sensors 250 disposed on the road and sequentially disposed at both sides of the excitation vehicle 210 according to a preset distance for receiving the illumination intensity at each preset position in real time;

the analysis device 260 is configured to perform the method for testing the road of the intelligent automotive headlamp according to the above embodiments.

It can be appreciated that the excitation vehicle 210 has complete power and electric system integration, and the front end and the tail end of the excitation vehicle 210 are specially modified to be provided with a standard headlamp system 211 and a standard rear-end lamp system 212, which are used as main targets for excitation identification of the tested vehicle 220. The standard headlamp system 211 is mounted on the body of the excited vehicle 210, the standard headlamp system 211 is a front lighting system which is selected to meet the light intensity requirement of a specified position in a specific position and geometric visibility range, the system is provided with a program-controlled switch, the system can be turned on or turned off after receiving a signal instruction, and meanwhile, a current change feedback signal generated by the system due to the switch can be collected and processed in a centralized manner by a data acquisition system. The standard rear-end lamp system 212 is mounted on the body of the excited vehicle 210, the standard rear-end lamp system 212 is a rear-end lamp system which is selected to attach a specified light intensity requirement in a specific position and geometric visibility range, the system is provided with a program-controlled switch, the system can be turned on or turned off after receiving a signal instruction, and meanwhile, a current change feedback signal generated by the system due to the switch is collected and intensively processed by a data acquisition system.

The exciting vehicle 210 may be provided with a signal transmission/reception device, which is connected with the switches of the standard headlight system 211 and the standard rear lamp system 212 in a programmed manner, and may perform a corresponding switching operation according to the received trigger signal from the distance trigger device 240.

The driver's eye illuminance sensor 213 comprises an illuminance probe, a fixing device base, a three-dimensional axial adjusting mechanism and an illuminance probe clamping mechanism, and the above mechanism components are connected and combined to complete the adjustment of the direction and angle of the illuminance probe.

The interior rearview mirror eyepoint illuminance sensor 214 comprises an illuminance probe, a fixing device base, a three-dimensional axial adjustment mechanism and an illuminance probe clamping mechanism, wherein the mechanism components are connected and combined to complete the adjustment of the direction and the angle of the illuminance probe.

A plurality of shade width illuminance sensors 250 may constitute an illuminometer test system that mounts a portable illuminometer of a specified model (i.e., shade width illuminance sensor 250) for acquisition of the illuminance distribution of the intelligent headlights 221 of the vehicle under test 220. Specifically, the device comprises a plurality of illumination probes and accessory devices (shielding width illumination sensors 250) which are used for receiving optical signals at specific designated positions and feeding back the optical signals in real time.

The intelligent automobile headlamp road test system can further comprise: and a data acquisition system.

The data acquisition system is used for collecting and data post-processing current change signals fed back by the standard headlamp system 211 and the standard backlight system 212, and can also be used for collecting and data post-processing illumination intensity signals fed back by the driver eyepoint illumination sensor 213, the inside rear view mirror eyepoint illumination sensor 214 and the plurality of shielding width illumination sensors 250.

The intelligent automobile headlamp road test system can further comprise: the total control system comprises a 5G base station 230, a program control system of a standard headlamp system 211 and a standard rear lamp system 212, an attached control computer host and related data processing software programs.

The signal transmission and receiving device, the standard head lamp system 211, the standard rear lamp system 212, the driver eye point illuminance sensor 213, the inside rear view mirror eye point illuminance sensor 214, the data acquisition system and the like in the excited vehicle 210 are all interconnected by wire harnesses, and the total control system consists of a computer, a servo driving device, a power supply, a communication part and other accessories and comprises an analysis device 260 which is used for running all calculation control programs required by the intelligent head lamp road test method of the automobile.

The arrangement positions of the driver's eye point illuminance sensor 213 and the inside rear view mirror eye point illuminance sensor 214 are as shown in fig. 3. Based on the above example, the driver's eye point illuminance sensor 213 includes a first illuminance probe and a first probe fixing means; the endoscope eyepoint illuminance sensor 214 includes a second illuminance probe and a second probe fixture.

The first probe fixing device is used for adjusting the position of the first illuminance probe and fixing the first illuminance probe at a first preset position of the excited vehicle in a first preset posture;

the second probe fixing device is used for adjusting the position of the second illuminance probe and fixing the second illuminance probe at a second preset position of the excited vehicle in a second preset posture.

On the basis of the above example, the first preset posture is directed toward the head direction of the excited vehicle and is parallel to the longitudinal center line of the excited vehicle, and the first preset posture is determined according to the driving position of the excited vehicle; the second preset posture is in the direction of the tail of the excited vehicle and is parallel to the longitudinal center line of the excited vehicle, and the second preset posture is the geometric center of the inner rearview mirror of the excited vehicle.

Specifically, the first and second probe fixtures inside the excitation vehicle 210 are strong and stable. Wherein the first illuminance probe is disposed at the driver's eye position with its axis direction toward the front of the excitation vehicle 210 and parallel to the longitudinal center line direction of the excitation vehicle 210. Wherein the driver's eye position is determined by the design parameters of the initiating vehicle 210. The second illuminance probe is disposed at the inner rear view mirror geometric center position with its axis direction toward the rear of the excitation vehicle 210 and parallel to the longitudinal center line direction of the excitation vehicle 210. The first probe fixing device corresponding to the first illuminance probe is provided with a position and angle adjusting device, so that the first illuminance probe can be conveniently adjusted left, right, up and down and aligned. The second probe fixing device corresponding to the second illuminance probe is provided with a position and angle adjusting device, so that the second illuminance probe can be conveniently adjusted left, right, up and down and aligned.

The device driver's eye illuminance sensor 213 is triggered when an oncoming vehicle (the traveling direction of the vehicle under test 220 is opposite to the head direction of the excited vehicle 210 and the vehicle under test 220 is in the head direction of the excited vehicle 210). The interior rear view mirror eyepoint illuminance sensor 214 is triggered when the vehicle 220 is following ahead (the traveling direction of the vehicle 220 is the same as the head direction of the exciting vehicle 210 and the vehicle 220 is in the tail direction of the exciting vehicle 210).

Based on the above example, the standard headlamp system 211 includes a first halogen lamp and a second halogen lamp, which are each 750mm apart from the ground, have an optical center-to-center spacing of 1500mm, and have an exit aperture area of 80cm ² The illumination intensity of the front illumination light emitted by the first halogen lamp and the second halogen lamp is less than 80% of the standard illumination upper limit of the front illumination lamp.

Wherein the illumination intensity of the headlight light emitted by the standard headlight system 211 should be not more than 80% of the prescribed maximum limit value at each point and each region prescribed by the current national standard of the relevant headlight.

Based on the above example, the standard rear lamp system 212 includes a first incandescent lamp and a second incandescent lamp, which are each 750mm apart from the ground, have an optical center-to-center spacing of 1500mm, and have a light extraction aperture area of 50cm ² The first incandescent lamp and the second incandescent lamp emit rear-position lamplight within a cone angle range larger than +/-25 degrees, the illumination front degree of the rear-position lamplight is smaller than 7cd, and the illumination front degree of the rear-position lamplight is larger than the standard illumination lower limit of the rear-position lamp.

The standard rear lamp system 212 can emit rear lamp light in a uniform manner within a cone angle range larger than +/-25 degrees, the upper limit of the luminous intensity in the area is not larger than 7cd, and the lower limit of the luminous intensity meets the light distribution performance requirement of the rear lamp specified by the current national standard.

Based on the above example, the 5G base station 230 is schematically configured, as shown in fig. 4, and the 5G base station 230 includes: the system comprises an acquisition signal transmission device, a router, a wireless network generation device and a signal amplifier.

The acquisition signal transmission device is in communication connection with the distance triggering device 240, and is used for acquiring the triggering signal sent by the distance triggering device 240 at high frequency and sending the triggering signal to the router;

the router is respectively in communication connection with the acquisition signal transmission device and the excitation vehicle, and is used for receiving the trigger signal forwarded by the acquisition signal transmission device and forwarding the trigger signal to the excitation vehicle;

the wireless network generating device is connected with the signal amplifier and used for providing a 5G network environment for the intelligent headlamp road test system of the automobile.

Alternatively, the distance triggering device 240 senses the schematic view of the vehicle under test 220, as shown in fig. 5. A distance triggering device 240, such as an infrared sensor, is disposed at a first distance (400 m) and a second distance (100 m) from the excitation vehicle 210, respectively, on a lane where the vehicle under test 220 is located. Illuminance sensors (a plurality of shielding width illuminance sensors 250) are respectively arranged on the left and right road side lines of the lane where the excitation vehicle 210 is located and the central lines of the lanes on the two adjacent sides, and the heights of the sensors are the same as the positions of the inside rearview mirrors of the excitation vehicle 210, and all the sensors are on the same horizontal line. The distance triggering device 240 includes an inductive sensor that can effectively and quickly sense the vehicle under test 220 under certain vehicle speed and dark ambient conditions.

The acquisition signal transmission device can acquire the trigger signal (the head lamp trigger signal or the rear lamp trigger signal) sent by the distance trigger device 240 at high frequency in a wired or wireless mode, process the data in a time of not more than 2ms, and send the trigger signal to the router.

The router distributes signals from the 5G base station 230 to various terminal devices (e.g., to excite the vehicle 210) and controls network traffic. The router is used as a transfer station for data distribution and is responsible for processing and distributing the received signals, realizing the management and distribution of data traffic according to the requirements of different devices and ensuring the rapid transmission of data in a network. The router in the 5G base station 230 adopts a higher frequency band signal and a channel with a larger bandwidth, thereby further improving network performance.

The wireless network generating device is combined with the signal amplifier, the wireless network generating device realizes the full coverage of the wireless network in the test range, controls the network time delay in the test requirement range, and provides a 5G network environment with short time delay and fixed time delay for the test. The wireless network generating device, which is a core device of the 5G base station 230, has a function of connecting each device (such as the standard headlamp system 211, the standard rear lamp system 212 and the distance triggering device 240) with the internet, plays a very important role in the 5G network, such as data transmission, signal processing, spectrum management and the like, and carries the transmission and processing of signals, so as to convert external data into a form available for each device. The 5G base station 230 enables communication with peripheral devices by receiving and transmitting electromagnetic waves to provide a fast and stable 5G network connection.

And the signal amplifier amplifies the wireless signal intensity of the wireless network generating device so as to provide a more stable wireless network environment in a larger range. The signal amplifier has the functions of receiving and transmitting signals, adjusting the strength and coverage area of the signals, and in a 5G network, the signal amplifier adopts MIMO (multiple input multiple output) technology, and a plurality of signal amplifiers are utilized for simultaneously transmitting and receiving the signals, so that the data transmission speed and the network capacity can be effectively improved. By optimizing the layout of the signal amplifiers, the design of the array, and the application of beamforming techniques, more powerful, stable signals can be captured and transmitted.

In this way, when the relative position of the tested vehicle 220 and the excited vehicle 210 is at the designated position (the position away from the triggering device 240), the triggering signal is rapidly and stably transmitted through the 5G wireless network, the carrier network (based on vpn+qos/Flex-E technology) and the core network technology, so that the excited vehicle 210 timely turns on the standard headlamp system 211 or the standard rear-end lamp system 212, and the response time of the system is stable and the signal transmission delay is low.

Further, the communication between the excitation vehicle 210 and the measured vehicle 220 needs to adopt a 5G wireless communication mode, the data transmission distance is not less than 500m, and the signal response delay is not more than 20ms. The initiating vehicle 210 should respond to the system immediately upon receiving the trigger signal (either a headlamp trigger signal or a rear-end lamp trigger signal) from the triggering device 240. The communication and data collection device (analysis means 260) is capable of reading analog level signals/real-time illuminance data of each illuminometer (driver's eye point illuminance sensor 213, inside rear view mirror eye point illuminance sensor 214, multiple shielding width illuminance sensors 250) and storing and displaying in a real-time curve manner. The current feedback signals for exciting the system response of the vehicle 210 (the standard headlamp system 211 and the standard rear-end lamp system 212 response) are also stored and displayed in a real-time curve manner, and the internal software of the analyzing device 260 can determine and calculate the exciting time and the shielding width of the intelligent headlamp 221 of the tested vehicle 220 through the curve change peak value, and the data can be conveniently derived and stored.

The excited vehicle 210 in the automobile intelligent headlamp road test system can be used for identifying the target object by the intelligent headlamp 221 of the detected vehicle 220, so that a lighting system (a standard headlamp system 211 or a standard rear-view lamp system 212) and an illuminance receiving device (a driver eye-point illuminance sensor 213 or an interior rearview mirror eye-point illuminance sensor 214) on the excited vehicle 210 are lightened at a specified vehicle intersection position (a distance triggering device 240), the intelligent headlamp 221 of the detected vehicle 220 timely responds to the system level, and meanwhile, the illuminance receiving device carried on the excited vehicle 210 can timely acquire feedback information after the intelligent headlamp 221 is adaptively changed and convert the feedback information into data flow information which is convenient to process through a photoelectric sensing unit of the illuminance receiving device, and finally, test index calculation and evaluation are carried out through system software which is developed in a matched mode.

Through the above-mentioned intelligent automotive headlamp road test system, a vehicle interaction test scene can be built, which can realize typical vehicle interaction tests (such as following and meeting), and what is important is a stable excited vehicle 210, wherein the excited vehicle 210 is used for simulating an opposite vehicle and a following vehicle, a set of standard headlamp system 211 and standard rear-view lamp system 212 are carried on the excited vehicle 210 as excitation light sources, meanwhile, an optical measuring instrument is carried in the excited vehicle 210, and accurate placement (a driver's eye point illuminance sensor 213 and an internal rear-view mirror eye point illuminance sensor 214) is realized at the driver's eye point position and the rear-view mirror position, so as to monitor whether the self-adaptive light pattern of the intelligent headlamp 221 of the tested vehicle 220 is excited. The intelligent automotive headlamp road test system should also develop corresponding test software, including an intelligent automotive headlamp road test method, to analyze and calculate whether the intelligent headlamp 221 is successfully activated, and the activation time and the shielding width. Meanwhile, because the test and the monitoring are required to be carried out at the specified vehicle distance, a corresponding signal transmission system for road test is also required to be developed for assisting in completing the test.

The embodiment has the following technical effects: an automobile intelligent headlamp road test system is constructed through an excited vehicle, a tested vehicle, a 5G base station, a distance triggering device, a plurality of shielding width illuminance sensors and an analysis device, so that the automobile intelligent headlamp road test system is utilized to test road performance of the tested vehicle provided with the intelligent headlamp, and the self-adaptive state excitation identification of the intelligent headlamp and the index test of excitation time and shielding width are realized.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in this specification, the terms "a," "an," "the," and/or "the" are not intended to be limiting, but rather are to be construed as covering the singular and the plural, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements.

It should also be noted that the positional or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. The method is characterized in that the analysis device applied to the automobile intelligent headlamp road test system comprises the following steps:

2. The method of claim 1, wherein determining the illuminance receiving apparatus according to a movement direction of the vehicle under test of the smart automotive headlamp road test system with respect to an excited vehicle of the smart automotive headlamp road test system includes:

if the moving direction of the detected vehicle relative to the excited vehicle is that the moving direction of the detected vehicle is the same as the head direction of the excited vehicle and the detected vehicle is in the tail direction of the excited vehicle, determining that the illuminance receiving device is an in-vehicle rearview mirror eye point illuminance sensor;

if the moving direction of the detected vehicle relative to the excited vehicle is that the advancing direction of the detected vehicle is opposite to the head direction of the excited vehicle and the detected vehicle is in the head direction of the excited vehicle, determining that the illuminance receiving device is a driver eyepoint illuminance sensor;

the standard headlamp system of the excited vehicle is started when receiving a headlamp trigger signal, the headlamp trigger signal is formed by a first distance trigger device which is arranged on the road and located at a first distance in the direction of the head of the excited vehicle, and when the detected vehicle is detected to travel to the position of the first distance trigger device at a target speed, a headlamp trigger signal is sent to a 5G base station of the intelligent headlamp road test system of the automobile so as to forward the headlamp trigger signal to the excited vehicle through the 5G base station; the standard rear lamp system of the excited vehicle is started when receiving a rear lamp trigger signal, the rear lamp trigger signal is formed by a second distance trigger device which is arranged on the road and located at a second distance in the tail direction of the excited vehicle, and when the detected vehicle is detected to travel to the position of the second distance trigger device at a target speed, the rear lamp trigger signal is sent to the 5G base station so as to forward the rear lamp trigger signal to the excited vehicle through the 5G base station.

3. The method according to claim 1, wherein the determining the activation time of the intelligent headlamp mounted on the vehicle under test according to the change of the illumination intensity collected by the illumination receiving device comprises:

determining the starting time of the lighting system;

and determining the difference value between the illumination intensity inflection point moment and the starting moment as the excitation time of the intelligent headlamp mounted on the tested vehicle.

4. The method of claim 1, wherein determining the shade width of the intelligent headlamp based on the change in the intensity of illumination collected by the plurality of shade width illuminance sensors comprises:

and determining the distance between the two target illuminance sensors positioned at the edge of each target illuminance sensor as the shielding width of the intelligent headlamp.

5. An automotive intelligent headlamp road test system, comprising: the system comprises an excitation vehicle, a tested vehicle, a 5G base station, a distance triggering device, a plurality of shielding width illuminance sensors and an analysis device; wherein,

The exciting vehicle is an M1 type passenger vehicle after transformation and is parked at a preset parking position of a road, a standard headlamp system, a standard rear-view lamp system, a driver eye-point illuminance sensor and an inner rear-view mirror eye-point illuminance sensor are mounted on the exciting vehicle, the standard headlamp system is used for emitting front illumination light to the front of the exciting vehicle, the standard rear-view lamp system is used for emitting rear-view light to the rear of the exciting vehicle, the driver eye-point illuminance sensor is used for obtaining illumination intensity of the front of the exciting vehicle, and the inner rear-view mirror eye-point illuminance sensor is used for obtaining illumination intensity of the rear of the exciting vehicle;

the analysis device is used for executing the intelligent headlamp road test method of the automobile according to any one of claims 1-4.

6. The system of claim 5, wherein the driver's eye point illuminance sensor comprises a first illuminance probe and a first probe fixture; the inner rearview mirror eyepoint illuminance sensor comprises a second illuminance probe and a second probe fixing device; wherein,

7. The system of claim 6, wherein the first preset pose is toward a head direction of the energized vehicle and parallel to a longitudinal centerline of the energized vehicle, the first preset pose being determined from a driving position of the energized vehicle; the second preset posture is in the direction of the tail of the excited vehicle and is parallel to the longitudinal center line of the excited vehicle, and the second preset posture is the geometric center of an inner rearview mirror of the excited vehicle.

8. The system of claim 5, wherein the standard headlamp system comprises a first halogen lamp and a second halogen lamp, wherein the first halogen lamp and the second halogen lamp are each 750mm apart from the ground, the first halogen lamp and the second halogen lamp have an optical center-to-center distance of 1500mm, and the first halogen lamp and the second halogen lamp have an exit aperture area of 80cm ² The illumination intensity of the front illumination light emitted by the first halogen lamp and the second halogen lamp is less than 80% of the standard illumination upper limit of the front illumination light.

9. The system of claim 5, wherein the standard rear light system comprises a first incandescent light and a second incandescent light, wherein the first incandescent light and the second incandescent light are each 750mm apart from the ground, wherein the first incandescent light and the second incandescent light have an optical center-to-center spacing of 1500mm, and wherein the first incandescent light and the second incandescent light have a light extraction aperture area of 50cm ² The first incandescent lamp and the second incandescent lamp emit rear lamplight within a cone angle range larger than +/-25 degrees, and the illumination front degree of the rear lamplight is smaller than 7cd and larger than the standard illumination lower limit of the rear lamplight.

10. The system of claim 5, wherein the 5G base station comprises: the system comprises a signal acquisition transmission device, a router, a wireless network generation device and a signal amplifier; wherein,

the acquisition signal transmission device is in communication connection with the distance triggering device and is used for acquiring the triggering signal sent by the distance triggering device at high frequency and sending the triggering signal to the router;