Method and system for testing low beam automatic response time of automobile headlamp

Abstract

The invention discloses a method and a system for testing low-beam automatic response time of an automobile headlamp. The method comprises the steps that when it is detected that a to-be-tested vehicle is started and a headlamp of the to-be-tested vehicle is in a lamplight automatic mode, the to-be-tested vehicle is controlled to move between a first test site meeting a first light intensity test condition and a second test site meeting a second light intensity test condition; when it is detected that the to-be-detected vehicle moves, state information of a headlamp of the to-be-detected vehicle and ambient light intensity information of the headlamp are obtained through an acquisition device located at a preset position of the to-be-detected vehicle; and according to the state information and the ambient light intensity information, determining a test result of the low-beam automatic response time of the headlamp. According to the application, acquisition equipment with high universality is used, the test of the low-beam automatic response time of the automobile headlamp can be completed at any two test sites meeting illumination intensity test conditions, a professional illumination laboratory is not needed, the test precision is high, the application range is wide, and the economic benefit is good.

Description

Technical Field

[0001] The present application relates to the technical field of automobile lighting detection, and in particular to a method and system for testing the automatic response time of a low-beam automobile headlamp. Background Art

[0002] In recent years, the intelligence of automobiles has been continuously developing. As an active safety technology, automatic headlights have become standard configurations in many cars when they leave the factory. Unlike traditional headlights that need to be turned on manually, automatic headlights can be turned on or off automatically according to the intensity of external light, which can effectively avoid safety hazards caused by drivers forgetting to turn on the lights.

[0003] Given the characteristics of automatic headlight technology, the timeliness and accuracy of turning on or off automatic headlights has become a new key factor affecting driving safety. At present, GB4785-2019 "Regulations on the Installation of External Lighting and Light Signal Devices for Motor Vehicles and Trailers" stipulates that the low beam of automobile headlights should be turned on and off correctly under different light intensities, and puts forward different requirements for the response time of the two processes of turning on and off.

[0004] In the relevant test methods for the automatic response of the low beam of the headlamp, there is also a method of using a handheld camera to record the change process of the low beam and the light intensity to determine the opening and closing time. Due to the influence of human subjective factors, only the corresponding relationship between the low beam response time and the light intensity can be roughly calculated, and the test accuracy is low. In addition, in the relevant test methods, more attention is paid to detecting whether the low beam of the headlamp can be turned on and off within the specified light intensity threshold, while ignoring the response time requirements of the low beam of the headlamp under the relevant light intensity. There are also problems such as complex test equipment, high cost, and poor versatility. Summary of the invention

[0005] In view of this, the present application provides a testing method and system for the automatic response time of the low beam of a vehicle headlamp. By using a highly universal acquisition device, the test of the automatic response time of the low beam of a vehicle headlamp can be completed at any two test locations that meet the light intensity test conditions. No professional lighting laboratory is required, the test has high accuracy, a wide range of applications, and good economic benefits.

[0006] According to one aspect of the present application, a method for testing the automatic response time of a low-beam headlamp of an automobile is provided, comprising: when it is detected that a vehicle to be tested is started and the headlamp of the vehicle to be tested is in an automatic light mode, controlling the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition; when it is detected that the vehicle to be tested is moving, obtaining status information of the headlamp of the vehicle to be tested and ambient light intensity information at the headlamp through a collection device located at a preset position of the vehicle to be tested; and determining a test result of the automatic response time of the low-beam headlamp based on the status information and the ambient light intensity information.

[0007] According to another aspect of the present application, a test system for the automatic response time of a low-beam headlamp of an automobile is provided, comprising: a control module, for controlling the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition when it is detected that the vehicle to be tested is started and the headlamp of the vehicle to be tested is in an automatic light mode; an acquisition module, for obtaining, when it is detected that the vehicle to be tested is moving, state information of the headlamp of the vehicle to be tested and ambient light intensity information at the headlamp through an acquisition device located at a preset position of the vehicle to be tested; and a determination module, for determining a test result of the automatic response time of the low-beam headlamp according to the state information and the ambient light intensity information.

[0008] By means of the above technical scheme, the present application provides a method and system for testing the automatic response time of the low beam of a vehicle headlamp, which controls the vehicle to be tested to move between any two test locations that meet the light intensity test conditions, and uses a highly universal collection device pre-installed on the vehicle to be tested to automatically and accurately collect the status information of the headlamp of the vehicle to be tested and the ambient light intensity information at the headlamp. There is no need for a professional lighting laboratory, and the test results of the automatic response time of the low beam of the headlamp of the vehicle to be tested can be obtained based on the status information and the ambient light intensity information. The test has high test accuracy, high versatility and good economic benefits.

[0009] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1A schematic flow chart of a method for testing the automatic response time of a low beam of a vehicle headlamp provided in an embodiment of the present application is shown;

[0012] Figure 2 A structural block diagram of a system for testing the automatic response time of a vehicle headlamp low beam provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0013] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0014] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0015] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, or there may be intermediate elements. In addition, the "connection" or "connection" used herein may include wireless connection or wireless fusion. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0016] The test method for the automatic response time of the low beam of a car headlamp provided in the embodiment of the present application can be applied to a terminal, can also be applied to a server, and can also be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc.; the server side can be configured as an independent physical server, or a server cluster or a distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application of the test method for the automatic response time of the low beam of a car headlamp, etc., but is not limited to the above forms.

[0017] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0018] The automatic headlights of automobiles can be automatically turned on or off according to the intensity of external light, which can avoid safety hazards caused by the driver forgetting to turn on the headlights. It has become an important technical means of active safety. Due to the characteristics of automobile automatic headlight technology, whether the automatic headlights are turned on / off in a timely and accurate manner has become a new important factor affecting driving safety. GB 4785-2019 "Regulations on External Lighting and Light Signal Devices of Motor Vehicles and Trailers" (hereinafter referred to as "Related Regulations") stipulates that the low beam of automobile headlights should be turned on and off correctly under different light intensities, and puts forward different requirements for the response time of the two processes of turning on and off. As shown in Table 1, when the light intensity is less than 1000 lux, the low beam turn-on response time should be less than 2s; when the light intensity is greater than 7000 lux, the low beam turn-off response time should be greater than 5s, but not more than 300s.

[0019] Table 1

[0020]

[0021] In view of the problems of low precision or complex test equipment and high cost caused by human subjective factors in related technologies, this embodiment provides a test method for the automatic response time of the low beam of a vehicle headlamp, such as Figure 1 As shown, the method includes:

[0022] Step 101 , when it is detected that the vehicle to be tested is started and the headlights of the vehicle to be tested are in an automatic light mode, the vehicle to be tested is controlled to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition.

[0023] In this embodiment, the vehicle to be tested is controlled to move between any two test locations that meet the light intensity test conditions to test the automatic response of the low beam headlights of the vehicle to be tested. There is no need for a very professional lighting laboratory, which reduces the test cost and site requirements, improves the flexibility and convenience of the test, and enables the test to be carried out in more different actual environments, thereby more realistically evaluating the performance and reliability of the automatic response of the low beam headlights of the vehicle to be tested.

[0024] For example, according to relevant regulations, an outdoor environment with a light intensity greater than 7000 lux (first light intensity test condition) can be used as the first test location, and an indoor environment with a light intensity less than 1000 lux (second light intensity test condition) can be used as the second test location, thereby controlling the vehicle to be tested to move between an outdoor environment with a light intensity greater than 7000 lux and an indoor environment with a light intensity less than 1000 lux, thereby testing the performance of the automatic response of the car's low beam headlights under sunlight conditions, ensuring the reliability of the test while improving the versatility of the test.

[0025] Step 102, when the movement of the vehicle to be tested is detected, the state information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight are obtained through a collection device located at a preset position of the vehicle to be tested.

[0026] In this embodiment, a collection device with high measurement accuracy and strong versatility is used, and the collection device is pre-set at a position corresponding to the headlamp, so that when the vehicle to be tested moves, the status information of the headlamp of the vehicle to be tested and the ambient light intensity information at the headlamp can be collected in a timely and accurate manner, providing strong data support for accurately evaluating the automatic response performance of the low beam of the headlamp of the vehicle to be tested.

[0027] Further, as a refinement and expansion of the specific implementation methods of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, the collection device includes a photosensitive device, a light intensity collection device and a light intensity conversion device. The steps of obtaining the status information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight through the collection device located at a preset position of the vehicle to be tested include: obtaining the voltage signal corresponding to the headlight at each moment when the vehicle to be tested moves through the photosensitive device, and determining the status information based on the voltage signal; wherein the voltage signal is determined based on the light intensity emitted by the headlight; obtaining the ambient light intensity at the headlight at each moment when the vehicle to be tested moves through the light intensity collection device; converting the ambient light intensity into a light signal through the light intensity conversion device, and determining the ambient light intensity information based on the light signal.

[0028] In this example, the data collected by different devices are presented in a unified form as signals, so that the collected data can be transmitted more efficiently between different devices, facilitating subsequent processing and analysis, increasing the readability and comprehensibility of the data, and improving the compatibility and scalability of this embodiment.

[0029] Specifically, the light intensity emitted by the headlamp is converted into a voltage signal using a photosensitive device, and the voltage signal corresponding to each moment when the headlamp moves is used as the state information. At the same time, the light intensity acquisition device and the light intensity conversion device are used to convert the ambient light intensity at the headlamp into a light signal, and the ambient light intensity information is determined based on the light signal. Thus, the voltage signal and the light signal can intuitively reflect the on or off state of the headlamp and the ambient light intensity at the headlamp.

[0030] Exemplarily, the photosensitive device may be a semiconductor device that is sensitive to light, such as a photosensitive element. When light shines on the photosensitive element, electrons inside the photosensitive element absorb the energy of photons and undergo transitions, thereby changing the resistance value of the photosensitive element or generating a certain voltage.

[0031] In this embodiment, the photosensitive element is used to detect the state of the headlamp. When the light emitted by the headlamp irradiates the photosensitive element, the photosensitive element will generate a corresponding voltage signal according to the light intensity. If the low beam of the headlamp is turned on, the light intensity is large, and the voltage signal generated by the photosensitive element will also be correspondingly large; if the low beam of the headlamp is turned off, the light intensity is zero, and the voltage signal generated by the photosensitive element will also be very small or zero.

[0032] Specifically, a soft black rubber cylindrical perforated suction cup can be used to better fit the surface of different headlights and adapt to various installation environments. Then install the photosensitive element in the suction cup hole, and adsorb the combination of the suction cup and the photosensitive element on the surface of the headlight. The suction cup and the surface of the headlight should fit well, and external light cannot be transmitted to the inside of the suction cup, so that the photosensitive element can be in a relatively stable state and in close contact with the surface of the headlight, ensuring that the photosensitive element can accurately receive the light emitted by the headlight and reduce the impact of external ambient light on the test results. At the same time, the fixing method of the suction cup facilitates the installation and removal of the photosensitive element, and facilitates rapid deployment and adjustment in different test scenarios.

[0033] Furthermore, the light intensity acquisition device is a professional instrument for measuring light intensity, which is used to acquire accurate ambient light intensity at the headlight. The light intensity conversion device is used to convert the ambient light intensity acquired by the light intensity acquisition device into a light signal.

[0034] For example, in order to ensure that the light intensity acquisition device can accurately obtain light conditions similar to those of the light sensor of the headlight of the vehicle under test, the two need to be arranged at the same horizontal height to reduce the light intensity difference caused by the height difference, so that the ambient light intensity collected by the light intensity acquisition device is closer to the light actually felt by the light sensor. At the same time, the light intensity acquisition device should be as close to the light sensor as possible to obtain more accurate ambient light information. However, it should not affect the normal operation of the light sensor, and avoid interference with the measurement results of the headlight light sensor due to the close distance between the two.

[0035] For example, the light intensity acquisition device can use a device with a display screen, which can convert the ambient light intensity at the headlight into a specific and accurate value. The light intensity conversion device has a shooting function, which is used to read the value of the ambient light intensity displayed on the display screen of the light intensity acquisition device. Therefore, the light intensity conversion device needs to be aligned with the display screen of the light intensity acquisition device.

[0036] In actual application scenarios, the photosensitive device and the light intensity conversion device can be connected to the data acquisition device to transmit the voltage signal and the light signal to the data acquisition device, so that the voltage signal and the light signal are processed in the data acquisition device, making the device used in this embodiment more universal.

[0037] Furthermore, as a refinement and expansion of the specific implementation methods of the above-mentioned embodiments, in order to fully illustrate the specific implementation process of this embodiment, the step of converting the ambient light intensity into an optical signal through a light intensity conversion device includes: if the ambient light intensity meets the first light intensity test condition or the second light intensity test condition, then determining the optical signal corresponding to the ambient light intensity that meets the first light intensity test condition or the second light intensity test condition through the light intensity conversion device, and recording the time when the optical signal is generated.

[0038] In this embodiment, the process of light intensity conversion is optimized. There is no need to convert the ambient light intensity at the headlamp at any time. Instead, the ambient light intensity that meets the target light intensity test conditions is converted into a corresponding light signal, and the data needed in the subsequent steps is extracted, thereby improving the efficiency and specificity of the light intensity conversion, reducing unnecessary conversion operations and resource consumption, and facilitating subsequent processing and analysis.

[0039] Exemplarily, when the light intensity conversion device reads that the numerical value of the ambient light intensity displayed on the display screen of the light intensity collection device meets the target light intensity test condition, where the target light intensity test condition is determined based on the first light intensity test condition and the second light intensity test condition, a voltage change will be generated inside the light intensity conversion device, thereby generating a light signal corresponding to the ambient light intensity that meets the target light intensity test condition based on the voltage change, and recording the time when the light signal is generated.

[0040] For example, continuing to connect the photosensitive device and the light intensity conversion device to the data acquisition device, the light intensity conversion device will transmit the light signal and the time when the light signal is generated as ambient light intensity information to the data acquisition device.

[0041] It should be noted that the accuracy of the moments involved in this embodiment is set to one thousandth to meet the high-precision requirement of the automatic response of the low-beam headlamp.

[0042] Step 103, determining a test result of the low beam automatic response time of the headlamp according to the state information and the ambient light intensity information.

[0043] In this example, the low-beam automatic response time of the headlamp is obtained through the state information of the vehicle to be tested under different lighting conditions and the ambient light intensity information, thereby determining the test result of the low-beam automatic response time of the headlamp.

[0044] Further, as a refinement and extension of the specific implementation methods of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, the test result of the automatic response time of the low beam of the headlight is determined according to the state information and the ambient light intensity information, including: according to the first state information and the first ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the first test location to the second test location, determining the first test result of the automatic turning on response time of the low beam of the headlight; according to the second state information and the second ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the second test location to the first test location, determining the second test result of the automatic turning off response time of the low beam of the headlight.

[0045] The first state information and the second state information are used as state information, and the first ambient light intensity information and the second ambient light intensity information are used as ambient light intensity information.

[0046] In this embodiment, the test process of the vehicle to be tested is divided into a test of the automatic turning on response time of the low beam headlights and a test of the automatic turning off response time of the low beam headlights, so as to obtain a test result corresponding to the relevant regulations on the automatic response of the low beam headlights.

[0047] Exemplarily, we continue to take an outdoor environment with a light intensity greater than 7000 lux as the first test location and an indoor environment with a light intensity less than 1000 lux as the second test location. When it is detected that the vehicle to be tested is started and the headlights of the vehicle to be tested are in AUTO mode (automatic lighting mode), the vehicle to be tested is controlled to slowly move from an outdoor environment with a light intensity greater than 7000 lux to an indoor environment with a light intensity less than 1000 lux to perform a test of the automatic start-up response of the low beam of the headlights. At the same time, the acquisition device is controlled to record the state of the headlights and the change in the ambient light intensity at the headlights during the process of the vehicle to be tested moving from an outdoor environment with a light intensity greater than 7000 lux to an indoor environment with a light intensity less than 1000 lux, thereby obtaining the first state information and the first ambient light intensity information.

[0048] Furthermore, when it is detected that the vehicle under test is located in an indoor environment with a light intensity of less than 1000 lux, the vehicle under test is controlled to slowly move from the indoor environment with a light intensity of less than 1000 lux to the outdoor environment with a light intensity of more than 7000 lux, so as to test the response of the automatic shutdown of the low beam of the headlight. At the same time, the acquisition device is controlled to record the state of the headlight and the change of the ambient light intensity at the headlight during the process of the vehicle under test moving from the indoor environment with a light intensity of less than 1000 lux to the outdoor environment with a light intensity of more than 7000 lux, so as to obtain the second state information and the second ambient light intensity information. When it is detected that the vehicle under test is located in an outdoor environment with a light intensity of more than 7000 lux for the second time, the vehicle under test is controlled to stop moving.

[0049] It should be noted that the first ambient light intensity information is determined based on the light signal corresponding to the ambient light intensity that meets the second light intensity test condition during the process of the vehicle under test moving from the first test location to the second test location, thereby providing a more accurate data range for the subsequent test of the automatic opening response of the low beam of the headlight. Similarly, the second ambient light intensity information is determined based on the light signal corresponding to the ambient light intensity that meets the first light intensity test condition during the process of the vehicle under test moving from the second test location to the first test location, thereby providing a more accurate data range for the subsequent test of the automatic closing response of the low beam of the headlight.

[0050] Further, as a refinement and expansion of the specific implementation methods of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, the step of determining the first test result of the automatic turning-on response time of the low beam of the headlight according to the first state information and the first ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the first test location to the second test location includes: sorting the moment when the light signal in the first ambient light intensity information is generated to determine the first moment sequence; determining the moment that is at the first position in the first moment sequence as the first target moment; sorting the moments corresponding to the voltage signals greater than the first preset threshold in the first state information to determine the second target moment; and determining the first test result according to the first target moment and the second target moment.

[0051] Specifically, according to relevant regulations, when the ambient light intensity at the headlamp is less than 1000 lux, the low beam needs to be automatically turned on within the specified time.

[0052] In this embodiment, the first moment when the headlights of the vehicle to be tested are at a light intensity less than 1000 lux is determined based on the first ambient light intensity information, and the first moment when the low beam of the headlight is automatically turned on is determined based on the first state information, so that the response time for the automatic turning on of the low beam of the headlight is determined based on these two moments, and then the first test result is determined based on the response time for the automatic turning on of the low beam of the headlight and the specified time.

[0053] Exemplarily, based on the above embodiment, the first ambient light intensity information is determined according to the light signal corresponding to the ambient light intensity that meets the second light intensity test condition when the vehicle to be tested moves from the first test location to the second test location, that is, the first ambient light intensity information includes light signals corresponding to ambient light intensities less than 1000 lux. Therefore, the moments when the light signals in the first ambient light intensity information are generated are sorted to determine the first moment sequence, and the moment that is at the first position in the first moment sequence is determined as the first target moment. In this way, the first moment when the ambient light intensity at the headlight is less than 1000 lux when the vehicle to be tested moves from the first test location to the second test location is accurately determined.

[0054] Further, the state of the headlight is determined according to the voltage signal in the first state information. Specifically, if the voltage signal is greater than the first preset threshold, a high level signal is output, indicating that the low beam of the headlight is turned on. If the voltage signal is less than the second preset threshold, a low level signal is output, indicating that the low beam of the headlight is turned off.

[0055] Exemplarily, the moments corresponding to the voltage signals greater than the first preset threshold in the first state information are sorted to determine the second moment sequence, and the moment at the first position in the second moment sequence is determined as the second target moment, so as to accurately determine the first moment of automatic low beam turning on of the headlamp in the time period when the low beam of the headlamp is automatically turned on. Then, the first test result is determined based on the first target moment and the second target moment.

[0056] It should be noted that the first preset threshold value and the second preset threshold value are determined according to the headlights of the vehicle to be tested in the actual application scenario. The voltage value corresponding to the headlights of the vehicle to be tested when it is turned on and the voltage value corresponding to the headlights of the vehicle to be tested when it is turned off can be measured in advance, so as to determine the first preset threshold value and the second preset threshold value based on the voltage values ​​measured in advance.

[0057] Further, as a refinement and expansion of the specific implementation method of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, a first test result is determined according to the first target moment and the second target moment, including: if the time difference between the first target moment and the second target moment is less than or equal to the preset time difference, the first test result is determined to be qualified; if the time difference between the first target moment and the second target moment is greater than the preset time difference, the first test result is determined to be unqualified.

[0058] In this example, the first test result is determined based on whether the time difference between the first moment when the headlights of the vehicle to be tested are at a light intensity less than 1000 lux and the first moment when the low beam of the headlights is automatically turned on meets the time requirements in relevant regulations to ensure the reliability of the first test result.

[0059] Exemplarily, the time difference between the first target moment and the second target moment is calculated on the time axis to obtain the response time for the automatic activation of the low beam of the headlight of the vehicle to be tested. According to relevant regulations, the response time for the automatic activation of the low beam of the headlight should not exceed 2s. Therefore, if the time difference between the first target moment and the second target moment is less than or equal to 2s (preset time difference), the first test result is determined to be qualified. If the time difference between the first target moment and the second target moment is greater than 2s (preset time difference), the first test result is determined to be unqualified.

[0060] Further, as a refinement and expansion of the specific implementation methods of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, according to the second state information and the second ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the second test location to the first test location, the second test result of the automatic shutdown response time of the low beam of the headlight is determined, including: sorting the moment when the light signal in the second ambient light intensity information is generated to determine the third moment sequence; determining the moment that is at the first position in the third moment sequence as the third target moment; determining the fourth target moment according to the third target moment and the first preset time, and determining the fifth target moment according to the third target moment and the second preset time; determining the second test result according to the voltage signals corresponding to the third target moment, the fourth target moment and the fifth target moment in the second state information.

[0061] Specifically, according to relevant regulations, when the ambient light intensity at the headlamp is greater than 7000 lux, the low beam needs to be automatically turned off within the specified time.

[0062] In this example, the time for automatically turning off the low beam is more flexible than the time for automatically turning on the low beam. This embodiment does not focus on determining the specific time when the low beam of the headlight of the vehicle to be tested is automatically turned off, but determines whether the headlight of the vehicle to be tested is turned off within the specified time through the voltage signal at a specific time.

[0063] Exemplarily, based on the above embodiment, the second ambient light intensity information is determined according to the light signal corresponding to the ambient light intensity that meets the first light intensity test condition during the process of the vehicle to be tested moving from the second test location to the first test location, that is, the second ambient light intensity information includes light signals corresponding to ambient light intensities greater than 7000 lux. Similar to the above determination of the first moment when the ambient light intensity at the headlight of the vehicle to be tested is less than 1000 lux, the moments when the light signals in the second ambient light intensity information are generated are sorted to determine the third moment sequence, and the moment that is at the first position in the third moment sequence is determined as the third target moment. In this way, the first moment when the ambient light intensity at the headlight of the vehicle to be tested is greater than 7000 lux when the vehicle to be tested moves from the second test location to the first test location is accurately determined.

[0064] Further, based on the relevant regulations, when the light intensity is greater than 7000 lux, the low beam off response time should be greater than 5 seconds, but not more than 300 seconds. This embodiment determines the fourth target time 5 seconds (first preset time) after the third target time, and determines the fifth target time 300 seconds (second preset time) after the third target time, so as to determine the state of the headlight of the vehicle to be tested at the third target time, the fourth target time and the fifth target time according to the voltage signals corresponding to the third target time, the fourth target time and the fifth target time in the second state information, and then determine the second test result.

[0065] Further, as a refinement and extension of the specific implementation methods of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, the second test result is determined according to the voltage signals corresponding to the third target moment, the fourth target moment and the fifth target moment in the second state information, including: if the voltage signals corresponding to the third target moment and the fourth target moment in the second state information are both greater than the first preset threshold, and the voltage signal corresponding to the fifth target moment is less than the second preset threshold, the second test result is determined to be qualified; if the voltage signal corresponding to the third target moment in the second state information is less than or equal to the first preset threshold, or the voltage signal corresponding to the fourth target moment is less than or equal to the first preset threshold, or the voltage signal corresponding to the fifth target moment is greater than or equal to the second preset threshold, the second test result is determined to be unqualified.

[0066] In this example, by comparing the magnitude relationship between the voltage signals corresponding to the third target moment, the fourth target moment and the fifth target moment and the preset threshold, the states of the headlights of the vehicle to be tested at the third target moment, the fourth target moment and the fifth target moment are determined, and thus, according to the states of the headlights at the third target moment, the fourth target moment and the fifth target moment, it is determined whether the headlights of the vehicle to be tested are turned off within the specified time range, so as to meet the flexibility of the automatic headlight shutdown response.

[0067] Exemplarily, if the voltage signals corresponding to the third target moment and the fourth target moment in the second state information are both greater than the first preset threshold, it is determined that the headlights of the vehicle to be tested are in the on state at the third target moment and the fourth target moment, and are not turned off, thereby satisfying the relevant provisions that when the light intensity is greater than 7000 lux, the low beam light off response time should be greater than 5s. Further, on the basis that the headlights of the vehicle to be tested are in the on state at the third target moment and the fourth target moment, if the voltage signal corresponding to the fifth target moment is less than the second preset threshold, it is determined that the headlights of the vehicle to be tested have been turned off at the fifth target moment, thereby satisfying the relevant provisions that when the light intensity is greater than 7000 lux, the low beam light is turned off for no more than 300s. At this time, the second test result is determined to be qualified.

[0068] Similarly, if the voltage signal corresponding to the third target time in the second state information is less than or equal to the first preset threshold, or the voltage signal corresponding to the fourth target time is less than or equal to the first preset threshold, it means that the headlight of the vehicle to be tested is turned off in advance. If the voltage signal corresponding to the fifth target time is greater than or equal to the second preset threshold, it means that the headlight of the vehicle to be tested is not turned off in time within the specified time. At this time, the second test result is determined to be unqualified.

[0069] Further, as a refinement and expansion of the specific implementation method of the above-mentioned embodiment, in order to fully illustrate the specific implementation process of this embodiment, the step of controlling the vehicle to be tested to move between a first test location that meets the first light intensity test condition and a second test location that meets the second light intensity test condition includes: determining the initial location and the target location of the vehicle to be tested according to the first test location and the second test location; randomly generating multiple paths from the initial location to the target location, the path being a path obtained by connecting multiple path points; encoding the path using the numbering of the path points that the path passes through in sequence from the initial location to the target location; dividing the paths with the same number of path points into the same subpopulation according to the encoding; performing parallel genetic operations on each subpopulation; determining the subpopulation with the best fitness value in the subpopulation after the genetic operation as the optimal subpopulation; performing genetic operations on the paths in the optimal subpopulation, and determining the optimal path according to the fitness value of the paths in the optimal subpopulation; controlling the vehicle to be tested to move from the initial location to the target location along the optimal path.

[0070] In this embodiment, the automation level of the test is further improved, the vehicle under test is controlled to move automatically between the first test location and the second test location, and the moving path is optimized to prevent unstable situations such as sudden stops and reverse movements of the vehicle under test during automatic movement, thereby ensuring stable movement of the vehicle under test.

[0071] For example, if the vehicle to be tested is detected to be located at the first test location, the first test location is used as the initial location and the second test location is used as the target location. If the vehicle to be tested is detected to be located at the second test location, the second test location is used as the initial location and the first test location is used as the target location. Alternatively, the moving direction of the vehicle to be tested is determined according to the received control instruction, so as to determine the initial location and the target location in the first test location and the second test location.

[0072] It is worth mentioning that if the initial position of the vehicle to be tested is not located at the first test location or the second test location, the initial location and the target location are determined according to the current position of the vehicle to be tested and the specific test process in the received control instruction. For example, if the received control instruction is to test the automatic opening response of the low beam of the headlight, the current position of the vehicle to be tested is used as the initial location and the second test location is used as the target location. At the same time, the moving path must include the first test location, so as to meet the test requirements of the automatic opening response and be applicable to a wider range of scenarios.

[0073] Furthermore, a two-dimensional coordinate system is constructed with the starting location as the origin and the line connecting the starting location to the target location as the x-axis. The line connecting the starting location to the target location is randomly divided into n equal parts, and a straight line Di is drawn through the equal division points to be orthogonal to the x-axis. With the road as a constraint, points are randomly selected on the straight line Di as path points; based on the path points, multiple paths from the starting location to the target location are randomly generated.

[0074] It should be noted that, in this embodiment, the global environmental information is assumed to be known, the environmental model is a two-dimensional structured space, the position of the obstacle in the environment is Ii(xobs,i,yobs,i), the obstacles set in the environment are introduced into the generation of the initial population, and an inspection device is provided to avoid the points or paths passed by the vehicle to be tested being inside or on the edge of the obstacle, and the path of the initial population is guided to be generated in the direction of the obstacle avoidance path to prevent falling into the local optimal solution.

[0075] Furthermore, an integer array can be used to encode the path. For example, suppose there are five path points numbered 1, 2, 3, 4, and 5, and a path passes through path points 2, 4, and 5 in sequence. Then the array [2, 4, 5] can be used to represent the encoding of this path. Next, traverse all the encoded paths and count the length of each path encoding (i.e., the number of path points). Use a data structure such as a hash table, with the number of path points as the key, to store paths with the same number of path points in the same list, so that they are divided into the same sub-population. Multi-threading technology or a distributed computing framework can be used to process each sub-population in parallel. Among them, multi-threading technology assigns a thread to each sub-population, and genetic operations are performed independently in different threads. In a distributed computing framework, if multiple computing nodes are available, sub-populations can be assigned to different nodes for parallel processing.

[0076] Then, genetic operations are performed in parallel on each sub-population. Among them, genetic operations include selection operations, crossover operations, and mutation operations. The selection operation calculates the fitness value of each path according to the fitness function, and then a part of the paths can be selected from the sub-population as the parent by using methods such as roulette selection and tournament selection. The crossover operation randomly selects two parent paths, performs a crossover operation at a specific intersection, and generates a new child path. For example, a position can be randomly selected in the middle of the path encoding, and the parts of the two parent path encodings after the position can be exchanged. The mutation operation performs mutation operations on part of the path. A path point can be randomly selected and replaced with another legal path point, but it must be ensured that the new path does not pass through obstacles.

[0077] Furthermore, the fitness values ​​of all paths in each subpopulation are calculated again. The best fitness values ​​of each subpopulation (i.e., the fitness value of the path with the highest fitness value in the subpopulation) are compared. The subpopulation with the best fitness value is selected as the optimal subpopulation. Then, the above genetic operation steps (selection, crossover, mutation) are repeated for the optimal subpopulation. The fitness values ​​of the paths in the optimal subpopulation are continuously updated. When the stopping condition is met (for example, a certain number of iterations is reached, the fitness value no longer increases, etc.), the path with the highest fitness value in the optimal subpopulation is selected as the optimal path.

[0078] It should be noted that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0079] Furthermore, if Figure 2 As shown, as a specific implementation of the above-mentioned test method for the automatic response time of the low beam of a vehicle headlight, an embodiment of the present application provides a test system 200 for the automatic response time of the low beam of a vehicle headlight, and the test system 200 for the automatic response time of the low beam of a vehicle headlight includes: a control module 201, a collection module 202 and a determination module 203.

[0080] The control module 201 is used to control the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition when it is detected that the vehicle to be tested is started and the headlights of the vehicle to be tested are in an automatic light mode;

[0081] The acquisition module 202 is used to obtain the state information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight through the acquisition device located at the preset position of the vehicle to be tested when the movement of the vehicle to be tested is detected;

[0082] The determination module 203 is used to determine the test result of the low beam automatic response time of the headlamp according to the state information and the ambient light intensity information.

[0083] In one embodiment, the acquisition module 202 is specifically used to obtain, through a photosensitive device, a voltage signal corresponding to the headlamp at each moment when the vehicle to be tested moves, and determine the status information based on the voltage signal; wherein the voltage signal is determined based on the light intensity emitted by the headlamp; obtain, through a light intensity acquisition device, the ambient light intensity at the headlamp at each moment when the vehicle to be tested moves; convert the ambient light intensity into a light signal through a light intensity conversion device, and determine the ambient light intensity information based on the light signal.

[0084] In one embodiment, the acquisition module 202 is specifically used to determine the optical signal corresponding to the ambient light intensity that meets the first light intensity test condition or the second light intensity test condition through a light intensity conversion device if the ambient light intensity meets the first light intensity test condition or the second light intensity test condition, and record the time when the optical signal is generated.

[0085] In one embodiment, the determination module 203 is specifically used to determine a first test result of the automatic turning-on response time of the low beam of the headlight according to the first state information and the first ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the first test location to the second test location; and determine a second test result of the automatic turning-off response time of the low beam of the headlight according to the second state information and the second ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the second test location to the first test location; wherein the first state information and the second state information are used as state information, and the first ambient light intensity information and the second ambient light intensity information are used as ambient light intensity information.

[0086] In one embodiment, the determination module 203 is specifically used to sort the moments when the light signals in the first ambient light intensity information are generated to determine the first moment sequence; determine the moment that is at the first position in the first moment sequence as the first target moment; sort the moments corresponding to the voltage signals greater than the first preset threshold in the first state information to determine the second moment sequence; determine the moment that is at the first position in the second moment sequence as the second target moment; and determine the first test result based on the first target moment and the second target moment.

[0087] In one embodiment, the determination module 203 is specifically used to determine the first test result as qualified if the time difference between the first target moment and the second target moment is less than or equal to the preset time difference; if the time difference between the first target moment and the second target moment is greater than the preset time difference, the first test result is determined as unqualified.

[0088] In one embodiment, the determination module 203 is specifically used to sort the moments when the light signals in the second ambient light intensity information are generated to determine the third moment sequence; determine the moment that is at the first position in the third moment sequence as the third target moment; determine the fourth target moment according to the third target moment and the first preset time, and determine the fifth target moment according to the third target moment and the second preset time; determine the second test result according to the voltage signals corresponding to the third target moment, the fourth target moment and the fifth target moment in the second state information.

[0089] In one embodiment, the determination module 203 is specifically used to determine the second test result as qualified if the voltage signals corresponding to the third target moment and the fourth target moment in the second state information are both greater than the first preset threshold, and the voltage signal corresponding to the fifth target moment is less than the second preset threshold; if the voltage signal corresponding to the third target moment in the second state information is less than or equal to the first preset threshold, or the voltage signal corresponding to the fourth target moment is less than or equal to the first preset threshold, or the voltage signal corresponding to the fifth target moment is greater than or equal to the second preset threshold, then the second test result is determined to be unqualified.

[0090] In one embodiment, the control module 201 is specifically used to determine the second test result as qualified if the voltage signals corresponding to the third target moment and the fourth target moment in the second state information are both greater than the first preset threshold, and the voltage signal corresponding to the fifth target moment is less than the second preset threshold; if the voltage signal corresponding to the third target moment in the second state information is less than or equal to the first preset threshold, or the voltage signal corresponding to the fourth target moment is less than or equal to the first preset threshold, or the voltage signal corresponding to the fifth target moment is greater than or equal to the second preset threshold, then the second test result is determined to be unqualified.

[0091] The specific definition of the test system for the automatic response time of the low beam of the automobile headlight can be found in the definition of the test method for the automatic response time of the low beam of the automobile headlight above, which will not be repeated here. Each module in the above-mentioned test system for the automatic response time of the low beam of the automobile headlight can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0092] Those skilled in the art will appreciate that the computer device structure provided in this embodiment does not limit the computer device, and may include more or fewer components, or a combination of certain components, or different component arrangements.

[0093] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0094] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A method for testing the automatic response time of a low beam of a vehicle headlamp, characterized in that: The method comprises: When it is detected that the vehicle to be tested is started and the headlights of the vehicle to be tested are in an automatic light mode, controlling the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition; When the movement of the vehicle to be tested is detected, the state information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight are obtained through a collection device located at a preset position of the vehicle to be tested; A test result of the low beam automatic response time of the headlamp is determined according to the state information and the ambient light intensity information.

2. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 1, characterized in that: The acquisition device includes a photosensitive device, a light intensity acquisition device and a light intensity conversion device. The acquisition device located at a preset position of the vehicle to be tested obtains the state information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight, including: Obtaining, by means of the photosensitive device, a voltage signal corresponding to the headlamp at each moment when the vehicle to be tested moves, and determining the state information according to the voltage signal; wherein the voltage signal is determined according to the light intensity emitted by the headlamp; The ambient light intensity at the headlight at each moment when the vehicle to be tested moves is obtained by the light intensity acquisition device; The ambient light intensity is converted into a light signal by the light intensity conversion device, and the ambient light intensity information is determined according to the light signal.

3. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 2, characterized in that: The step of converting the ambient light intensity into a light signal by means of the light intensity conversion device comprises: If the ambient light intensity meets the first light intensity test condition or the second light intensity test condition, the light signal corresponding to the ambient light intensity that meets the first light intensity test condition or the second light intensity test condition is determined by the light intensity conversion device, and the time when the light signal is generated is recorded.

4. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 1, characterized in that: The step of determining the test result of the low beam automatic response time of the headlamp according to the state information and the ambient light intensity information includes: Determine a first test result of the low beam automatic start response time of the headlamp according to the first state information and the first ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the first test location to the second test location; Determining a second test result of the low beam automatic shut-off response time of the headlamp according to the second state information and the second ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the second test location to the first test location; The first state information and the second state information are used as the state information, and the first ambient light intensity information and the second ambient light intensity information are used as the ambient light intensity information.

5. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 4, characterized in that: The first test result of determining the low beam automatic start response time of the headlamp according to the first state information and the first ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the first test location to the second test location includes: Sorting the moments when the light signals in the first ambient light intensity information are generated to determine a first moment sequence; Determine the first moment in the first moment sequence as the first target moment; Sorting the moments corresponding to the voltage signals greater than the first preset threshold in the first state information to determine a second moment sequence; Determine the first moment in the sequence of the second moments as the second target moment; The first test result is determined according to the first target time and the second target time.

6. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 5, characterized in that: The determining the first test result according to the first target time and the second target time includes: If the time difference between the first target time and the second target time is less than or equal to the preset time difference, determining the first test result as qualified; If the time difference between the first target time and the second target time is greater than the preset time difference, the first test result is determined to be unqualified.

7. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 4, characterized in that: The second test result of determining the low beam automatic shutoff response time of the headlamp according to the second state information and the second ambient light intensity information obtained by the acquisition device when the vehicle to be tested moves from the second test location to the first test location includes: Sorting the moments when the light signals in the second ambient light intensity information are generated to determine a third moment sequence; Determine the first moment in the third moment sequence as the third target moment; Determine a fourth target time according to the third target time and the first preset time, and determine a fifth target time according to the third target time and the second preset time; The second test result is determined according to the voltage signals corresponding to the third target time, the fourth target time, and the fifth target time in the second state information.

8. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 7, characterized in that: The determining the second test result according to the voltage signals corresponding to the third target time, the fourth target time, and the fifth target time in the second state information includes: If the voltage signals corresponding to the third target time and the fourth target time in the second state information are both greater than the first preset threshold, and the voltage signal corresponding to the fifth target time is less than the second preset threshold, the second test result is determined to be qualified; If the voltage signal corresponding to the third target moment in the second state information is less than or equal to the first preset threshold, or the voltage signal corresponding to the fourth target moment is less than or equal to the first preset threshold, or the voltage signal corresponding to the fifth target moment is greater than or equal to the second preset threshold, then the second test result is determined to be unqualified.

9. The method for testing the automatic response time of the low beam of a vehicle headlamp according to claim 1, characterized in that: The controlling the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition comprises: Determining an initial location and a target location of the vehicle to be tested according to the first test location and the second test location; Randomly generate multiple paths from the initial location to the target location, where the paths are paths obtained by connecting multiple path points; Encoding the path by using the numbers of the path points that the path passes through in sequence from the initial location to the target location; Dividing the paths with the same number of path points into the same sub-population according to the codes; Performing parallel genetic operations on each of the subpopulations; The sub-population with the best fitness value among the sub-populations after genetic operation is determined as the optimal sub-population; Performing genetic operations on the paths in the optimal subpopulation, and determining an optimal path according to the fitness values ​​of the paths in the optimal subpopulation; The vehicle to be tested is controlled to move from the initial location to the target location according to the optimal path.

10. A test system for the automatic response time of the low beam of a vehicle headlamp, characterized in that: The device comprises: A control module, for controlling the vehicle to be tested to move between a first test location that meets a first light intensity test condition and a second test location that meets a second light intensity test condition when detecting that the vehicle to be tested is started and the headlights of the vehicle to be tested are in an automatic light mode; A collection module, used for obtaining the state information of the headlight of the vehicle to be tested and the ambient light intensity information at the headlight through a collection device located at a preset position of the vehicle to be tested when the movement of the vehicle to be tested is detected; A determination module is used to determine a test result of the low beam automatic response time of the headlamp according to the state information and the ambient light intensity information.

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