A testing method for electric vehicle

Abstract

The present invention relates to the field of intelligent manufacturing technology, and in particular to a method for testing an electric vehicle, comprising: respectively utilizing the position sensing device, the audio detection device, and the appearance detection device to obtain position data, audio data, and appearance image data of the electric vehicle on the test track; obtaining a status indicator based on the position data, the audio data, and the appearance image data; and comparing the status indicator with a preset status indicator threshold to determine the status of the electric vehicle and obtain a test result. The present invention solves the problem in the prior art that the testing process of an electric vehicle is difficult to integrate with the production and manufacturing process of intelligent control, improves the automation level of the testing process, meets the management and display requirements of an intelligent factory, and has the characteristics of a clever structure, small space occupation, high automation level, and strong versatility.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing technology, and in particular to a testing method for an electric vehicle. Background Art

[0002] Automation and intelligence are becoming increasingly popular in the manufacturing field, and the application demand for intelligent control and display technologies such as digital twins is also gradually expanding. In the production and manufacturing links of some electric vehicles, the concept of demonstration production lines is also becoming increasingly popular. Its purpose is to fully simulate the production and manufacturing process of electric vehicles, combine interactive control, digital twins and other technologies, combine simulated production lines with actual production lines, and improve real-time display and intelligent control of the entire production process such as manufacturing, assembly and testing.

[0003] In the existing technology, the components and assembly quality of electric vehicles are often inspected and judged through manual inspection. This method is low-cost and has no technical threshold, but it has at least the following disadvantages: since there is no relatively complete electric vehicle test demonstration circuit, the electric vehicle testing process is inefficient and has poor results. The degree of automation and intelligence cannot meet the general requirements of intelligent manufacturing, cannot be demonstrated through mature demonstration circuits, and is difficult to integrate with the intelligent control production and manufacturing process.

[0004] In summary, how to optimize the testing method of electric vehicles to meet the dual needs of testing and demonstration is an urgent problem that needs to be solved in the field of intelligent manufacturing technology. Summary of the Invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an electric vehicle testing method to solve the problems in the prior art that the electric vehicle testing process is inefficient, has poor results, the degree of automation and intelligence cannot meet the general requirements of intelligent manufacturing, cannot be demonstrated through mature demonstration circuits, and is difficult to integrate with the intelligent control production and manufacturing process.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides an electric vehicle testing method for demonstrating the electric vehicle testing process, characterized in that the electric vehicle is tested on a test track, wherein the test track is provided with a position sensing device, an audio detection device, and an appearance detection device;

[0007] The method comprises:

[0008] Using the position sensing device, the audio detection device, and the appearance detection device, respectively, to obtain position data, audio data, and appearance image data of the electric vehicle on the test track;

[0009] Obtaining a state indicator according to the position data, the audio data, and the appearance image data, the state indicator including a first state indicator, a second state indicator, and a third state indicator;

[0010] The state index is compared with a preset state index threshold to determine the state of the electric vehicle and obtain a test result.

[0011] Furthermore, the step of obtaining a status indicator based on the position data, the audio data, and the appearance image data specifically includes:

[0012] When the position of the electric trolley is detected by the position sensing device, the time information of the electric trolley at the current position is recorded;

[0013] A first state index is obtained according to the position data and the time information, and the first state index at least represents speed information of the electric vehicle at each of the opposing photoelectric switches.

[0014] Furthermore, the step of obtaining a status indicator based on the position data, the audio data, and the appearance image data specifically includes:

[0015] Performing noise reduction processing on the audio data to obtain intermediate audio data;

[0016] A second state indicator is obtained based on the intermediate audio data, wherein the second state indicator at least represents the maximum audio of the electric vehicle in the moving state. Further, the step of obtaining the position data, audio data and appearance image data of the electric vehicle on the test track specifically includes:

[0017] Identifying a portion of the appearance image data related to the electric vehicle to obtain intermediate appearance image data;

[0018] Based on a preset selection rule, a third state indicator is selected from the intermediate appearance image data.

[0019] Furthermore, the step of comparing the state indicator with a preset state indicator threshold to determine the state of the electric vehicle and obtain a test result specifically includes:

[0020] Compare and judge the first state indicator, the second state indicator and the third state indicator respectively with corresponding thresholds in the state indicator thresholds;

[0021] If at least one of the status indicators exceeds the status indicator threshold, it is confirmed that the quality of the electric vehicle is unqualified.

[0022] Furthermore, the step of comparing the state indicator with a preset state indicator threshold to determine the state of the electric vehicle and obtain a test result specifically includes:

[0023] Performing weighted fusion on the first state indicator, the second state indicator, and the third state indicator to obtain a quality state score of the electric vehicle;

[0024] Comparing the quality status score with the status indicator threshold value;

[0025] If the quality status score exceeds the status index threshold, it is confirmed that the quality of the electric vehicle is unqualified.

[0026] Furthermore, the test track includes a ramp section, a curve section, a bridge section and a straight section.

[0027] Furthermore, the test track includes a spiral structure consisting of the ramp section and the curve section. When the electric vehicle passes through the spiral structure, one or more of the position data, audio data and appearance image data of the electric vehicle under ramp road conditions and curve road conditions can be simultaneously acquired.

[0028] Furthermore, the test runway includes a straight bridge road composed of the bridge road section and the straight section. When the electric vehicle passes through the straight bridge road, one or more of the position data, audio data and appearance image data of the electric vehicle under bridge road conditions and straight road conditions can be obtained simultaneously.

[0029] Furthermore, an automatic pick-and-place device is provided near the entrance of the test track. The automatic pick-and-place device includes a robotic arm for picking up the electric vehicle and placing it into the test track.

[0030] Furthermore, the position sensing device includes a plurality of opposing photoelectric switches, and the opposing photoelectric switches are evenly spaced along the test track and arranged on both sides of the test track.

[0031] Furthermore, baffles are provided on the side edges of the test track.

[0032] As described above, the present invention has the following beneficial effects:

[0033] By setting position sensing devices, audio detection devices and appearance detection devices on the test track, status indicators are obtained, and the quality of the electric vehicle is judged in combination with preset status indicator thresholds. This solves the problems in the existing technology of low efficiency and poor effect of the electric vehicle testing process, the degree of automation and intelligence cannot meet the general requirements of intelligent manufacturing, and it cannot be demonstrated through mature demonstration lines. It is difficult to integrate with the intelligent control production and manufacturing process. The automation level of the test process is improved, the product quality control efficiency of the electric vehicle is improved, and the management and display needs of the intelligent factory are met. It has the characteristics of ingenious structure, small space occupancy, high degree of automation, and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 1 is a flow chart of a method for testing an electric vehicle in an exemplary embodiment of the present invention;

[0035] Figure 2 FIG. 1 is a schematic diagram of the overall structure of a test track in an exemplary embodiment of the present invention.

[0036] Part Number Description

[0037] Entrance section 1;

[0038] First surrounding section 21, second surrounding section 22, bridge section 23, straight section 24, baffle 201, support frame 202;

[0039] Photoelectric switch 3;

[0040] Audio sensor 4;

[0041] Vision Camera 5;

[0042] Automatic pick-and-place device 6, robotic arm 61, mounting platform 62;

[0043] Support column 7. DETAILED DESCRIPTION

[0044] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0045] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "first", "second", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0046] The electric car in this application refers to a small-sized electric vehicle that can be driven on the road under normal working conditions, including but not limited to a car model equipped with an electric drive module, a remote control car, etc.

[0047] In one embodiment, see Figure 1 , Figure 1 1 is a flow chart of a method for testing an electric vehicle in accordance with an exemplary embodiment of the present invention. In this embodiment, the electric vehicle is tested on a test track equipped with a position sensing device, an audio detection device, and an appearance detection device.

[0048] The method specifically comprises the following steps:

[0049] In step S10, the position sensing device, the audio detection device, and the appearance detection device are used to obtain position data, audio data, and appearance image data of the electric vehicle on the test track.

[0050] In step S20, a state indicator is obtained according to the position data, the audio data and the appearance image data, wherein the state indicator includes a first state indicator, a second state indicator and a third state indicator;

[0051] In step S30, the state index is compared with a preset state index threshold to determine the state of the electric vehicle and obtain a test result.

[0052] In step S10, the electric vehicle on the test track is detected using a position sensing device, an audio detection device, and an appearance detection device installed on the test track. Position data, audio data, and appearance image data are obtained. It is understood that the position sensing device is used to identify the position of the electric vehicle and to determine whether the operating status of the electric vehicle meets the preset standards in the subsequent steps. The position sensing device may include but is not limited to a photoelectric switch, an infrared sensor, or a radar. The audio detection device is used to identify the audio information emitted by the electric vehicle during operation and to determine whether the sound emitted by the electric vehicle is abnormal in the subsequent steps, thereby determining whether there are problems such as loose parts or damage. The audio detection device may include but is not limited to a noise sensor, a microphone device with an audio conversion function, etc. The appearance detection device is used to identify the appearance of the electric vehicle on the test track and to determine whether there are any abnormalities in the appearance of the electric vehicle in the subsequent steps, thereby determining whether there are problems such as loose parts or damage. The appearance detection device may include but is not limited to a camera, a camera, a radar, etc.

[0053] For step S20, it is necessary to obtain status indicators based on the position data, audio data and appearance image data obtained in S10, including a first status indicator, a second status indicator and a third status indicator corresponding to the position data, audio data and appearance image data respectively. It should be understood that the status indicator refers to a numerical indicator that can be directly used for comparison or judgment obtained by processing the acquired position data, audio data and appearance image data according to a preset processing method, processing rule or algorithm. Its specific form includes but is not limited to normalized parameters, score values ​​obtained by weighted calculation, etc.

[0054] In one embodiment, the present application specifically provides a solution for processing location data, including:

[0055] When the position of the electric trolley is detected by the position sensing device, the time information of the electric trolley at the current position is recorded;

[0056] A first state index is obtained according to the position data and the time information, and the first state index at least represents speed information of the electric vehicle at each of the opposing photoelectric switches.

[0057] For the above steps, when the position of the electric vehicle is detected, the corresponding time information is recorded. It can be understood that the time information can be, for example, the moment or period corresponding to the position data at a certain position. Through the position data and the corresponding time information, a first state indicator that at least characterizes the speed information of the electric vehicle is obtained. For example, in some embodiments, the position sensing device is a photoelectric switch 3. When the electric vehicle passes through the photoelectric switch 3, a characteristic electrical signal is generated in the photoelectric switch 3. The characteristic electrical signal can be regarded as position information, characterizing that the electric vehicle passes through the photoelectric switch 3. The photoelectric switch 3 records the time when the characteristic electrical signal is received. According to the single time recorded by the single photoelectric switch 3, the instantaneous speed of the electric vehicle at the corresponding position is calculated. According to the multiple times recorded by multiple photoelectric switches 3, the average speed of the electric vehicle between the corresponding multiple photoelectric switches 3 is calculated.

[0058] As mentioned above, by setting a position sensing device, an audio detection device and an appearance detection device on the test track, status indicators are obtained, and the quality of the electric vehicle is judged in combination with the preset status indicator thresholds. This solves the problems in the existing technology of low efficiency and poor effect of the electric vehicle testing process, the degree of automation and intelligence cannot meet the general requirements of intelligent manufacturing, and it cannot be demonstrated through mature demonstration lines and is difficult to integrate with the intelligent control production and manufacturing process. It improves the automation level of the test process, improves the product quality control efficiency of the electric vehicle, and meets the management and display needs of the intelligent factory. It has the characteristics of clever structure, small space occupancy, high degree of automation, and strong versatility.

[0059] In one embodiment, the present application specifically provides a solution for processing audio data, including:

[0060] Performing noise reduction processing on the audio data to obtain intermediate audio data;

[0061] According to the intermediate audio data, a second state index is obtained, which at least represents the maximum audio frequency of the electric vehicle in the moving state.

[0062] For the above steps, the obtained audio data is subjected to noise reduction processing to obtain intermediate audio data, and a second state indicator is obtained based on the intermediate audio data. It should be understood that the noise reduction processing here generally refers to filtering out the audio from sound sources other than the electric car in the audio data. The purpose is to reduce the interference of other sound sources on the detection results. The noise reduction processing can be completed through existing noise reduction methods such as subspace algorithm, linear filtering processing, machine learning noise reduction, etc. Since the specific principles of the algorithm or processing method are not technical features necessary for the implementation of the scheme of this application, this application does not limit it; the second state indicator at least characterizes the maximum audio of the electric car in the moving state, so as to compare it with the preset state indicator threshold to determine whether there is an abnormal assembly state in the electric car and emit an abnormal sound. In some embodiments, for example, the audio data is linearly filtered to filter out continuous abnormal audio emitted by other devices during detection, so as to obtain intermediate audio data that can accurately reflect the state of the electric vehicle, and the maximum value and discontinuous value are screened out from the intermediate audio data as the second state indicator; it is worth noting that the second state indicator obtained according to the intermediate audio data can be one or more peaks in the intermediate audio data, or it can be part or the entire audio data. For example, in some embodiments, the entire audio segment is directly obtained from the intermediate audio data. In subsequent steps, the obtained second state indicator, i.e., the entire audio segment, can be used to perform a complete comparison with a preset state indicator threshold, such as standard audio, so as to fully judge the state information of the electric vehicle corresponding to the entire audio segment through the degree of deviation of the disputed audio at each moment relative to the standard audio.

[0063] In one embodiment, the present application specifically provides a solution for processing appearance image data, including:

[0064] Identifying a portion of the appearance image data related to the electric vehicle to obtain intermediate appearance image data;

[0065] Based on a preset selection rule, a third state indicator is selected from the intermediate appearance image data.

[0066] For the above steps, the part of the appearance image data related to the electric vehicle is identified to obtain intermediate appearance image data. It can be understood that the appearance image data obtained by the appearance detection device generally refers to data information such as photos and videos containing the appearance image of the electric vehicle. The intermediate appearance image data refers to the data information obtained by identifying useful targets in the appearance image data, such as the electric vehicle. This step can be completed by existing image recognition algorithms such as image segmentation, color recognition, and target detection based on deep learning. Based on a preset selection rule, a third state indicator is selected from the intermediate appearance image data. The selection rule here refers to a method selected as a judgment benchmark for determining whether there is a problem with the electric vehicle in subsequent steps. For example, in some embodiments, the obtained appearance image data is a single-frame image of the electric vehicle when it is driving. The electric vehicle is extracted from the single-frame image by an image segmentation algorithm to obtain the intermediate appearance image data. The preset selection rule is to select the outer width of the two front wheels of the electric vehicle, and obtain the outer width of the two front wheels in the single-frame image from the intermediate appearance image data, so as to subsequently compare and judge with the outer width of the two front wheels in the preset state indicator threshold.

[0067] In step S30, the status indicator is compared with a preset status indicator threshold to determine the status of the electric vehicle and obtain a test result. The status indicator threshold here refers to a set of thresholds that are pre-set based on the quality requirements for the electric vehicle and are used to compare with the obtained status indicator to determine whether the quality of the electric vehicle is qualified, including but not limited to speed thresholds, audio thresholds, and appearance size thresholds.

[0068] Specifically, in another embodiment, the present application further provides a solution for determining the state of the electric vehicle, including:

[0069] Compare and judge the first state indicator, the second state indicator and the third state indicator respectively with corresponding thresholds in the state indicator thresholds;

[0070] If at least one of the status indicators exceeds the status indicator threshold, it is confirmed that the quality of the electric vehicle is unqualified.

[0071] For the above steps, the multiple status indicators obtained in step S20 need to be compared with the thresholds in the status indicator thresholds respectively. When any status indicator exceeds the threshold, the quality of the electric vehicle is judged to be unqualified.

[0072] Specifically, in another embodiment, the present application also provides another solution for determining the state of the electric vehicle, including:

[0073] Performing weighted fusion on the first state indicator, the second state indicator, and the third state indicator to obtain a quality state score of the electric vehicle;

[0074] Comparing the quality status score with the status indicator threshold value;

[0075] If the quality status score exceeds the status index threshold, it is confirmed that the quality of the electric vehicle is unqualified.

[0076] For the above steps, each state indicator obtained needs to be weighted to obtain a quality state score, and then the quality state score is compared with the threshold value corresponding to the quality state score in the state indicator threshold to judge the quality of the electric vehicle. It is worth noting that the weighting here refers to the preset weighting coefficient according to the degree of influence of each state indicator on the state of the electric vehicle, and each state indicator is multiplied by the corresponding weighting coefficient and then added up to obtain a value that can reflect the state of the electric vehicle as a whole from the dimensions of multiple state indicators. It should be understood that the specific calculated value during weighting varies with the emphasis on the judgment criteria for the electric vehicle. Therefore, this application does not limit the specific weighting coefficient.

[0077] In one embodiment, the present application also specifically provides a structural solution for the specific implementation of the electric vehicle testing method, see Figure 2 , Figure 2 This is a schematic diagram of the overall structure of a test track in an exemplary embodiment of the present invention, including an entrance section 1, a test track, a position sensing device, an audio detection device, and an appearance detection device. The entrance section 1 and the test track constitute a test path for the electric vehicle, which drives the electric vehicle. The position sensing device and the audio detection device are set on the test track to collect information from the moving electric vehicle.

[0078] In this embodiment, the entrance section 1 is a section of runway connected to the starting position of the test runway. After the electric vehicle is placed in the entrance section 1, it will enter the test runway. It can be understood that the purpose of setting up the entrance section 1 is to provide an entrance for the electric vehicle to enter the runway test system. Its specific form can be a window, an opening, or a test section.

[0079] In this embodiment, the test runway specifically includes a first surround section 21, a second surround section 22, a bridge section 23 and a straight section 24. The first surround section 21 and the second surround section 22 respectively surround two support columns 7 in the runway test system, and the first surround section 21 and the second surround section 22 are both spiral structures. The support column 7 is mainly used to support the first surround section 21 and the second surround section 22. In this embodiment, the support column 7 is a cylinder, which matches the first surround section 21 and the second surround section 22 of the spiral structure to facilitate installation and fixation. In other embodiments, the structure of the support column 7 can also be adjusted according to the differences in the test runway structure and layout requirements.

[0080] It should be understood that the road conditions of the test track should include ramps, curves, bridges and flat roads to ensure that the status of the electric vehicle under various working conditions can be simulated and tested. In some embodiments, the first surround section 21 and the second surround section 22 can also be surround sections formed by alternating combinations of ramps and curves. In this embodiment, the road conditions of the bridge are included in the bridge section 23, and the road conditions of the flat road are included in the straight section 24. The first surround section 21 and the second surround section 22 adopt a spiral structure, which is a regular combination of ramps and curves, and also includes the road condition characteristics of ramps and curves. When the electric vehicle is traveling on the first surround section 21 or the second surround section 22, the slope driving characteristics and curve driving characteristics of the electric vehicle can be tested at the same time, which is conducive to further improving the test efficiency. At the same time, this structure is convenient for display and observation, and can meet the control and display needs of the smart factory for the test process.

[0081] In this embodiment, the lower end of the first surround section 21 is connected to the entrance section 1 through a bend, and the lower end of the second surround section 22 is connected to the straight section 24 through a bend. The upper end of the first surround section 21 and the upper end of the second surround section 22 are flush and opposite, and are connected through the bridge section 23. The bridge section 23 is a straight section spanning the first surround section 21 and the second surround section 22. The electric vehicle enters the test runway through the entrance section 1, and completes the test after passing through the first surround section 21, the bridge section 23, the second surround section 22 and the straight section 24 in sequence.

[0082] In this embodiment, a baffle 201 is provided on the side edge of the test track to prevent the electric vehicle from rushing out of the test track during the test. A support frame 202 is provided at the lower end of the entrance section 1 and the straight section 24 to play a supporting role.

[0083] In some embodiments, the runway test system further includes an automatic pick-and-place device 6 disposed near the entrance section 1, the automatic pick-and-place device 6 including a robotic arm 61. In this embodiment, the automatic pick-and-place device 6 includes a mounting platform 62 disposed close to the straight runway of the entrance section 1, and a robotic arm 61 mounted on the mounting platform 62. When the electric trolley is transported to the vicinity of the mounting platform 62, the robotic arm 61 picks up the electric trolley and places it into the entrance section 1 for testing.

[0084] The function of the position sensing device, audio detection device and appearance detection device is to obtain the self-state, driving state and driving information of the electric vehicle on the test track. In different implementations, it can be implemented by using devices including but not limited to laser radar, sensors, cameras and integrated sound and light collection functions.

[0085] Specifically, in this embodiment, an implementation scheme is specifically provided, wherein the position sensing device includes a photoelectric switch 3 arranged on the baffle 201 along the test track, and the photoelectric switch 3 is evenly spaced on the test track for obtaining the driving speed and related information of the electric vehicle; the audio detection device includes an audio sensor 4 arranged on the baffle 201 for identifying sound information such as abnormal noise emitted by the electric vehicle during driving, so as to determine whether there is an assembly quality problem; the appearance detection device includes a visual camera 5 arranged at the starting position, middle position and end position of the test track. In this embodiment, the visual camera 5 is respectively arranged at the junction of the entrance section 1 and the first surrounding section 21, the middle of the bridge section 23 and the straight section 24. The visual camera 5 collects the appearance data of the electric vehicle when entering and leaving the test track, as well as the appearance data on the track, for determining whether there is an appearance change during the test.

[0086] The specific implementation process of this embodiment is as follows:

[0087] When the electric trolley is transported to the vicinity of the mounting platform 62, the robotic arm 61 takes the electric trolley and places it into the entrance section 1. The electric trolley enters the test track through the entrance section 1, and completes the test after passing through the first surround section 21, the bridge section 23, the second surround section 22 and the straight section 24 in sequence. During this process, the photoelectric switch 3 obtains the driving speed and related information of the electric trolley, and the audio sensor 4 identifies the sound information such as abnormal noise emitted by the electric trolley during driving. In the above implementation process, the quality of the electric trolley is judged by combining the first state indicator, the second state indicator and the third state indicator obtained with the preset state indicator threshold.

[0088] To sum up, in an electric vehicle testing method provided in an embodiment of the present invention, a position sensing device, an audio detection device and an appearance detection device are set on a test track to obtain status indicators, and the quality of the electric vehicle is judged in combination with a preset status indicator threshold. This solves the problems in the prior art of low efficiency and poor effect of the electric vehicle testing process, the degree of automation and intelligence cannot meet the general requirements of intelligent manufacturing, cannot be demonstrated through mature demonstration lines, and is difficult to integrate with the intelligent control production and manufacturing process. It improves the automation level of the testing process, improves the product quality control efficiency of the electric vehicle, meets the management and display needs of the intelligent factory, and has the characteristics of clever structure, small space occupancy, high degree of automation, and strong versatility.

[0089] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A method for testing an electric vehicle, used to demonstrate the testing process of an electric vehicle, characterized in that: The electric vehicle is tested on a test track, which is provided with a position sensing device, an audio detection device and an appearance detection device. The test track includes a first surrounding section, a second surrounding section, a bridge section and a straight section. The first surrounding section and the second surrounding section respectively surround two support columns of the runway test system, and the first surrounding section and the second surrounding section are both spiral structures. The road conditions of the test track include ramps, curves, bridges and flat roads. The road conditions of the bridges are included in the bridge section, and the road conditions of the flat roads are included in the straight section. The first surrounding section and the second surrounding section adopt a spiral structure. The spiral structure is a regular combination of ramps and curves, and includes the road condition characteristics of ramps and curves. When the electric vehicle travels on the first surrounding section or the second surrounding section, the slope driving characteristics and the curve driving characteristics of the electric vehicle can be tested simultaneously; The method comprises: Using the position sensing device, the audio detection device, and the appearance detection device, respectively, to obtain position data, audio data, and appearance image data of the electric vehicle on the test track; Obtaining a state indicator according to the position data, the audio data, and the appearance image data, the state indicator including a first state indicator, a second state indicator, and a third state indicator; The state index is compared with a preset state index threshold to determine the state of the electric vehicle and obtain a test result.

2. The electric vehicle testing method according to claim 1, characterized in that: The step of obtaining a status indicator based on the position data, the audio data, and the appearance image data specifically includes: When the position of the electric trolley is detected by the position sensing device, the time information of the electric trolley at the current position is recorded; A first state index is obtained according to the position data and the time information, and the first state index at least represents speed information of the electric vehicle at each opposing photoelectric switch.

3. The electric vehicle testing method according to claim 1, characterized in that: The step of obtaining a status indicator based on the position data, the audio data, and the appearance image data specifically includes: Performing noise reduction processing on the audio data to obtain intermediate audio data; A second state index is obtained based on the intermediate audio data, and the second state index at least represents the maximum audio frequency of the electric vehicle in the moving state.

4. The electric vehicle testing method according to claim 1, characterized in that: The step of obtaining a status indicator based on the position data, the audio data, and the appearance image data specifically includes: Identifying a portion of the appearance image data related to the electric vehicle to obtain intermediate appearance image data; Based on a preset selection rule, a third state indicator is selected from the intermediate appearance image data.

5. The electric vehicle testing method according to claim 1, characterized in that: The step of comparing the state indicator with a preset state indicator threshold to determine the state of the electric vehicle and obtain a test result specifically includes: Compare and judge the first state indicator, the second state indicator and the third state indicator respectively with corresponding thresholds in the state indicator thresholds; If at least one of the status indicators exceeds the status indicator threshold, it is confirmed that the quality of the electric vehicle is unqualified.

6. A method for testing an electric vehicle according to claim 1 or 5, characterized in that: The step of comparing the state indicator with a preset state indicator threshold to determine the state of the electric vehicle and obtain a test result specifically includes: Performing weighted fusion on the first state indicator, the second state indicator, and the third state indicator to obtain a quality state score of the electric vehicle; Comparing the quality status score with the status indicator threshold value; If the quality status score exceeds the status index threshold, it is confirmed that the quality of the electric vehicle is unqualified.

7. The electric vehicle testing method according to claim 1, characterized in that: The test track includes a spiral structure consisting of a ramp section and a curve section.

8. The electric vehicle testing method according to claim 1, characterized in that: The test track includes a straight bridge track consisting of the bridge track section and the straight section.

9. The electric vehicle testing method according to claim 1, characterized in that: An automatic pick-and-place device is provided near the entrance of the test track. The automatic pick-and-place device includes a robotic arm for picking up the electric vehicle and placing it on the test track.

10. The electric vehicle testing method according to claim 1, characterized in that: The position sensing device includes a plurality of opposing photoelectric switches, and the opposing photoelectric switches are evenly spaced along the test track on both sides of the test track; a plurality of noise detection devices are symmetrically arranged on both sides of the test track; and three appearance detection devices are respectively arranged at the starting position, middle position and end position of the test track.

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