CN115015861A

CN115015861A - Parking auxiliary performance testing method and electronic equipment

Info

Publication number: CN115015861A
Application number: CN202210705619.7A
Authority: CN
Inventors: 韩友国; 姚朝华; 吴洪涛; 杨玉梅; 汤德如; 董光奇; 王明
Original assignee: Chery New Energy Automobile Co Ltd
Current assignee: Chery New Energy Automobile Co Ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-09-06

Abstract

The application discloses a method for testing auxiliary parking performance and electronic equipment, and belongs to the technical field of intelligent driving. The method comprises the following steps: the method comprises the steps of receiving a plurality of alarm sound signals from the sound collector, receiving a plurality of images from the camera, and testing the radar detection performance of the target vehicle based on the alarm sound signals and the images. According to the method and the device, the radar detection performance of the target vehicle is tested based on the received sound alarm signals and the received images, the problem of the parking auxiliary system can be found in time, the specific distance range of the parking auxiliary system with the problem can be accurately determined, and data support is provided for the improvement of the distance measurement problem of the parking auxiliary system by technicians.

Description

Parking auxiliary performance testing method and electronic equipment

Technical Field

The application relates to the technical field of intelligent driving, in particular to a method for testing parking auxiliary performance and electronic equipment.

Background

With the development of technology, more and more vehicles are equipped with parking assistance systems to assist drivers to park. The parking auxiliary system can determine the distance between obstacles around the vehicle under ideal conditions, and informs a driver of the approximate distance between the obstacles and the vehicle by using alarm sounds with different frequencies and different images displayed by an instrument panel, so that the action of the driver in visiting the front, the back, the left and the right during parking is reduced, and the parking process is simpler and safer.

However, the situation of the vehicle during actual driving is complicated, the parking assist system cannot achieve the desired effect, and a problem of false alarm may occur. These problems can create a significant safety hazard if they are not discovered and modified before the vehicle leaves the factory. Therefore, a method for testing the parking assistance performance of a vehicle is needed to test the parking assistance performance of the vehicle so that the problem of the parking assistance system can be found in time.

Disclosure of Invention

The application provides a method and electronic equipment for testing parking auxiliary performance, which can find the problem of a parking auxiliary system in time. The technical scheme is as follows:

on one hand, a method for testing the parking auxiliary performance is provided, a sound collector is arranged around an instrument panel in a target vehicle to be tested, a camera is further arranged in the target vehicle, and the shooting range of the camera covers the instrument panel, and the method comprises the following steps:

receiving a plurality of warning sound signals from the sound collector, wherein the warning sound signals are acquired after obstacles are placed at a plurality of different positions in a test area, the test area is located around the target vehicle and covers a radar detection range of the target vehicle, and the different positions cover different detection distances of the radar;

receiving a plurality of images from the camera, wherein the plurality of images correspond to the plurality of alarm sound signals one to one, the plurality of images are obtained by shooting the instrument panel after the obstacles are placed at the plurality of different positions, and the instrument panel is used for displaying the closest distances between the obstacles at the plurality of different positions and the radar of the target vehicle;

and testing the radar detection performance of the target vehicle based on the plurality of alarm sound signals and the plurality of images.

Optionally, in the case of testing the radar level detection performance of the target vehicle, the test region includes a first test sub-region, a second test sub-region and a third test sub-region, the first test sub-region is located at the head of the target vehicle, the second test sub-region and the third test sub-region are located at the tail of the target vehicle, and the area of the second test sub-region is larger than the area of the third test sub-region;

the length direction of the obstacle is perpendicular to the ground where the target vehicle is located, a first grid cloth is laid on the ground in the first testing sub-area, a second grid cloth is laid on the ground in the second testing sub-area and the third testing sub-area, and the plurality of different positions are a plurality of different grids in the first grid cloth and the second grid cloth.

Optionally, in the case of testing the radar vertical detection performance of the target vehicle, the test area includes a first test sub-area and a second test sub-area, the first test sub-area is located at the head of the target vehicle, the second test sub-area is located at the tail of the target vehicle, the length direction of the obstacle is parallel to the ground where the target vehicle is located, a third mesh cloth is suspended in the first test sub-area in the direction perpendicular to the ground, a fourth mesh cloth is suspended in the second test sub-area in the direction perpendicular to the ground, and the different positions are different meshes in the third mesh cloth and the fourth mesh cloth.

Optionally, the testing the radar detection performance of the target vehicle based on the plurality of warning sound signals and the plurality of images includes:

processing the plurality of alarm sound signals and the plurality of images to determine the number of positions in the plurality of different positions which can be normally tested;

dividing the number of positions in the plurality of different positions which can be normally tested by the total number of the plurality of different positions to obtain test coverage;

and if the test coverage rate is larger than a coverage rate threshold value, determining that the radar detection performance of the target vehicle meets the requirement.

Optionally, the target vehicle is used for repeatedly playing a buzzer to alarm when an obstacle in the radar detection range is detected;

the processing the plurality of warning sound signals and the plurality of images to determine the number of positions in the plurality of different positions that can be normally tested, includes:

for a first warning sound signal of the plurality of warning sound signals, performing audio processing on the first warning sound signal to determine a play frequency of the beep in the first warning sound signal;

for a first image corresponding to the first alarm sound signal in the plurality of images, performing image recognition on the first image to determine a distance identifier in the first image;

and if the playing frequency of the buzzer in the first alarm sound signal corresponds to the distance identification in the first image and the correct test response of a tester is detected, determining that the first position is a position capable of being tested normally, and the first position is the position for placing the barrier when the first alarm sound signal is collected.

Optionally, the audio processing the first warning sound signal to determine the playing frequency of the beep in the first warning sound signal comprises:

performing a derivative operation on the first alarm sound signal;

if the data which is larger than 0 exists in the sound data after the derivative operation, two continuous maximum values in the sound data after the derivative operation are obtained;

determining the reciprocal of the absolute time difference between the two maxima as the playing frequency of the beep in the first warning sound signal.

Optionally, gravels with the height within the height range are paved on the ground where the target vehicle is located, and the target vehicle is used for repeatedly playing a buzzer to give an alarm when an obstacle within the radar detection range is detected; the method further comprises the following steps:

and under the condition that the target vehicle is in a full-load state, if no buzzing sound exists in the alarm sound signals from the sound collector and no distance identification exists in the images from the camera, determining that the radar cut-off height of the target vehicle meets the requirement.

Optionally, the parking assist system of the target vehicle is connected to a current collecting probe of a data collector, a shooting range of the camera also covers a vehicle-mounted display screen of the target vehicle, and a gear shifting module of the target vehicle is connected to a switch collector, and the method further includes:

receiving a plurality of working currents acquired by the data acquisition instrument through the current acquisition probe, wherein the working currents are currents of the target vehicle in a reverse gear after the target vehicle is electrified for a plurality of times;

determining a plurality of initialization times through the switch collector and the camera, wherein the plurality of initialization times are the initialization times of the parking auxiliary system after the target vehicle is electrified for a plurality of times;

determining an average value of the plurality of working currents as a system working current, and determining an average value of the plurality of initialization times as a system initialization time;

and testing the initialization performance of the parking assist system of the target vehicle based on the system working current and the system initialization time.

Optionally, a digital sign is placed at the tail of the target vehicle; the determining a plurality of initialization times through the switch collector and the camera includes:

receiving a plurality of gear shifting signals collected by the switch collector, wherein the plurality of gear shifting signals are gear shifting signals collected by the target vehicle after the whole vehicle is electrified for a plurality of times;

receiving a plurality of reversing images from the camera, wherein the plurality of reversing images are obtained by shooting the vehicle-mounted display screen when the target vehicle is in a reversing gear position after the whole vehicle is electrified for a plurality of times;

if the gear shifting signals are all reverse gear signals and the reverse images comprise the reverse images and the digital signs, taking the acquisition time of the gear shifting signals as start time, taking the acquisition time of the reverse images as end time, and determining the time difference between the start time and the corresponding end time to obtain the initialization times.

In another aspect, an electronic device is provided, in which a sound collector is provided around an instrument panel in a target vehicle to be tested, a camera is further provided in the target vehicle, a shooting range of the camera covers the instrument panel, and the electronic device includes a processor configured to:

In another aspect, there is provided a test apparatus for a parking assistance performance, the apparatus including:

a first receiving module, configured to receive multiple warning sound signals from the sound collector, where the multiple warning sound signals are collected after obstacles are placed at multiple different positions in a test area, the test area is located around the target vehicle and covers a radar detection range of the target vehicle, and the multiple different positions cover different detection distances of the radar;

a second receiving module, configured to receive multiple images from the camera, where the multiple images correspond to the multiple alarm sound signals one to one, the multiple images are obtained by shooting the instrument panel after placing the obstacles at the multiple different positions, and the instrument panel is used to display the closest distances between the obstacles at the multiple different positions and the radar of the target vehicle;

and the first testing module is used for testing the radar detection performance of the target vehicle based on the plurality of alarm sound signals and the plurality of images.

the length direction of the obstacle is perpendicular to the ground where the target vehicle is located, a first grid cloth is paved on the ground in the first test sub-area, a second grid cloth is paved on the ground in the second test sub-area and the third test sub-area, and the different positions are different grids in the first grid cloth and the second grid cloth.

Optionally, the first test module comprises:

the processing unit is used for processing the plurality of alarm sound signals and the plurality of images so as to determine the number of positions which can be normally tested in the plurality of different positions;

the operation unit is used for dividing the number of positions which can be normally tested in the plurality of different positions by the total number of the plurality of different positions to obtain the test coverage rate;

a determination unit, configured to determine that the radar detection performance of the target vehicle meets a requirement if the test coverage is greater than a coverage threshold.

the processing unit includes:

a processing subunit for, for a first alarm sound signal of the plurality of alarm sound signals, audio processing the first alarm sound signal to determine a play frequency of the beep in the first alarm sound signal;

the identification subunit is used for carrying out image identification on a first image corresponding to the first alarm sound signal in the plurality of images so as to determine a distance identifier in the first image;

and the determining subunit is configured to determine that a first position is a position where a normal test can be performed if the playing frequency of the buzzer in the first alarm sound signal corresponds to the distance identifier in the first image and a correct test response of a tester is detected, where the first position is a position where the obstacle is placed when the first alarm sound signal is acquired.

Optionally, the processing subunit is specifically configured to:

performing derivative operation on the first alarm sound signal;

determining an inverse of an absolute time difference between the two maxima as a play frequency of the beep in the first warning sound signal.

Optionally, gravels with the height within the height range are paved on the ground where the target vehicle is located, and the target vehicle is used for repeatedly playing buzzes to alarm when obstacles within the radar detection range are detected;

the device also includes:

the first determining module is used for determining that the radar cut-off height of the target vehicle meets the requirement if no buzzing sound exists in the alarm sound signals from the sound collector and no distance identification exists in the images from the camera under the condition that the target vehicle is in a full-load state.

Optionally, the parking assist system of the target vehicle is connected with a current collecting probe of a data collector, a shooting range of the camera also covers a vehicle-mounted display screen of the target vehicle, and a gear shifting module of the target vehicle is connected with a switch collector;

the device also includes:

the third receiving module is used for receiving a plurality of working currents acquired by the data acquisition instrument through the current acquisition probe, wherein the working currents are currents of the target vehicle in a reverse gear after the whole vehicle is electrified for a plurality of times;

the second determining module is used for determining a plurality of initialization times through the switch collector and the camera, wherein the initialization times are the initialization times of the parking auxiliary system after the target vehicle is electrified for a plurality of times;

the third determining module is used for determining the average value of the plurality of working currents as the system working current and determining the average value of the plurality of initialization time as the system initialization time;

and the second testing module is used for testing the initialization performance of the parking assist system of the target vehicle based on the system working current and the system initialization time.

Optionally, a digital sign is placed at the tail of the target vehicle;

the second determining module is specifically configured to:

In another aspect, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for testing the parking assistance performance.

In another aspect, a computer program product is provided that contains instructions that, when executed on a computer, cause the computer to perform the steps of the method for testing the performance of a parking aid as described above.

The technical scheme provided by the application can bring the following beneficial effects at least:

by placing obstacles in different positions around the target vehicle, the target vehicle can generate an alarm sound and also can display the distance indicator through the instrument panel. Like this, sound collector can gather the alarm sound signal and send the alarm sound signal for electronic equipment, and simultaneously, the camera can shoot the distance sign that the panel board shows and send the image of shooing for electronic equipment. The electronic equipment tests the radar detection performance of the target vehicle based on the received sound alarm signals and the images, can find the problem of the parking auxiliary system in time, can accurately determine the specific distance range of the parking auxiliary system with the problem, and provides data support for the improvement of the distance measurement problem of the parking auxiliary system by technicians.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic illustration of an implementation environment provided by an embodiment of the present application;

FIG. 2 is a flowchart of a method for testing auxiliary parking performance according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a distance between an obstacle and a target vehicle according to an embodiment of the present disclosure;

FIG. 4 is a left side view of a target vehicle and an obstacle according to an embodiment of the present disclosure;

FIG. 5 is a top view of a target vehicle and an obstacle according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a test area division according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a radar cutoff height test provided by an embodiment of the present application;

fig. 8 is a schematic structural diagram of a testing apparatus for auxiliary parking performance according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Before explaining the method for testing the parking assistance performance provided by the embodiment of the present application in detail, an application scenario and an implementation environment related to the embodiment of the present application will be introduced.

First, an application scenario related to the embodiment of the present application is described.

Because the situation of the vehicle in the actual driving process is complex, the parking assist system mounted on the vehicle cannot achieve the ideal effect in the actual application, and the problems of false alarm and the like may occur. These problems can create a significant safety hazard if not discovered and rectified before the vehicle leaves the factory. The method provided by the embodiment of the application can be used for testing the parking auxiliary performance of the target vehicle based on the alarm sound signal, the image, the working current and the initialization time generated by the target vehicle, so that the problems of the parking auxiliary system can be found in time, and technicians can perform targeted correction on the found problems.

The following description will be made of an implementation environment to which embodiments of the present application relate.

Referring to FIG. 1, FIG. 1 is a schematic diagram illustrating an implementation environment in accordance with an example embodiment. The implementation environment includes a target vehicle 101, a data collection assembly 102, and an electronic device 103. The data acquisition component 102 is configured to acquire relevant data of the target vehicle 101 during a test process, and the electronic device 103 is configured to determine a test result of the parking assistance performance of the target vehicle 101 based on the data acquired by the data acquisition component 102. The data collection component 102 and the electronic device 103 can be communicatively coupled. The communication connection may be a wired connection or a wireless connection, which is not limited in this embodiment of the present application.

The data acquisition component 102 includes a sound collector, a camera, a data collector, and a switch collector. The sound collector is located around an instrument panel in the target vehicle 101, and is configured to collect an alarm sound generated by the target vehicle 101 and transmit the collected alarm sound signal to the electronic device 103. The camera is located inside the target vehicle 101, and a shooting range of the camera covers the dashboard and the on-board display screen of the target vehicle 101, and the camera is configured to shoot an image displayed on the dashboard and an image of the on-board display screen, and send the shot image displayed on the dashboard and the image of the on-board display screen to the electronic device 103. The data acquisition instrument has a current acquisition probe, and the current acquisition probe is used for accessing the parking assist system of the target vehicle 101 and acquiring the working current of the parking assist system of the target vehicle 101. The data acquisition instrument sends the operating current acquired by the current acquisition probe to the electronic device 103. The switch collector is used for accessing a gear shifting module of the target vehicle 101, collecting a gear shifting signal of the target vehicle 101, and sending the collected gear shifting signal to the electronic device 103.

The electronic device 103 is used for receiving the data sent by the data acquisition component 102, and processing and displaying the received data. For example, the data may be warning sound signals, images displayed on the dashboard, and images of the on-board display screen, operating current, and shift signals. The electronic device 103 may be any electronic product that can perform human-Computer interaction with a user through one or more modes such as a keyboard, a touch pad, a touch screen, a remote controller, voice interaction or handwriting equipment, for example, a PC (Personal Computer), a mobile phone, a smart phone, a PDA (Personal Digital Assistant), a wearable device, a pocket PC (pocket PC), a tablet Computer, a smart television, and the like.

Those skilled in the art will appreciate that the functions of the data collection assembly 102 and the electronic device 103 are merely examples, and other functions, now existing or later to occur, such as those applicable to the embodiments of the present application, are also included within the scope of the embodiments of the present application and are hereby incorporated by reference.

It should be noted that the application scenarios and the implementation environments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided in the embodiments of the present application, and it is known by a person skilled in the art that the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems along with the appearance of new application scenarios and the evolution of implementation environments.

The following explains the method for testing the parking assistance performance provided in the embodiment of the present application in detail. Fig. 2 is a flowchart of a method for testing parking assistance performance of a target vehicle according to an embodiment of the present application, where the method is used to test parking assistance performance of the target vehicle, a sound collector is arranged around an instrument panel in the target vehicle, and a camera is further arranged in the target vehicle, and a shooting range of the camera covers the instrument panel in the target vehicle. Referring to fig. 2, the method includes the following steps.

Step 201: the electronic equipment receives a plurality of alarm sound signals from the sound collector, the alarm sound signals are acquired after obstacles are placed at a plurality of different positions in a test area, the test area is located around a target vehicle and covers the radar detection range of the target vehicle, and the different positions cover different detection distances of a radar of the target vehicle.

During actual parking, there may be obstacles around the target vehicle, which may be in a blind spot of the driver's sight, and the driver may be at risk of collision of the target vehicle with the obstacles while parking. In order to avoid collision between a target vehicle and an obstacle when parking, the target vehicle may be equipped with a radar to detect the obstacle around the target vehicle, and further determine a distance between the obstacle and the target vehicle, and may further be provided with a first corresponding relationship, where the first corresponding relationship is used to indicate a corresponding relationship between a distance range and a playback frequency of a buzzer, and when the distance range where the distance between the target vehicle and the obstacle is different, the playback frequency of the buzzer repeated playback by the target vehicle for alarming is also different, so that the target vehicle may repeatedly play the buzzer at the playback frequency corresponding to the first corresponding relationship based on the distance between the target vehicle and the obstacle detected by the radar to alarm, and prompt a driver that an obstacle exists near the target vehicle, thereby reducing a risk of collision between the target vehicle and the obstacle when parking, the parking assistance function for the target vehicle is achieved.

In some embodiments, the head and tail of the target vehicle may be provided with the same first correspondence. In other embodiments, the head and tail of the target vehicle may be provided with different first correspondences, since the target vehicle's head blind zone is different from the target vehicle's tail blind zone for the driver. For example, the first correspondence of the target vehicle head settings is shown in table 1 below. When the distance between the obstacle and the target vehicle is greater than or equal to 25 cm and less than or equal to 35 cm, the buzzer sound, namely the prolonged sound, is continuously played. When the distance between the obstacle and the target vehicle is greater than or equal to 40 cm and less than or equal to 60 cm, the playing frequency of the buzzer at the time is 4 Hz. When the distance between the obstacle and the target vehicle is greater than or equal to 65 cm and less than or equal to 90 cm, the playing frequency of the buzzer at the time is 2 Hz. When the distance between the obstacle and the target vehicle is greater than 90 cm, no buzzer sound is played at this time.

TABLE 1

Range of distances	Playing frequency of buzzing sound
		Not less than 25 cm and not more than 35 cm	Continuous play (Long playing)
40 cm or more and 60 cm or less	4Hz
		Greater than or equal to 65 cm and less than or equal to 90 cm	2Hz
Greater than 90 cm	Not playing

For another example, the first correspondence relationship set at the rear of the target vehicle is shown in table 2 below. When the distance between the obstacle and the target vehicle is greater than or equal to 25 cm and less than or equal to 35 cm, the buzzer sound, namely the prolonged sound, is continuously played. When the distance between the obstacle and the target vehicle is greater than or equal to 40 cm and less than or equal to 60 cm, the playing frequency of the buzzer at the time is 4 Hz. When the distance between the obstacle and the target vehicle is greater than or equal to 65 cm and less than or equal to 90 cm, the playing frequency of the buzzer sound is 2 Hz. When the distance between the obstacle and the target vehicle is greater than or equal to 95 cm and less than or equal to 150 cm, the playing frequency of the buzzer sound is 1 Hz. When the distance between the obstacle and the target vehicle is more than 150 cm, the buzzer sound is not played at the moment.

TABLE 2

In order to test the parking assistance performance of the target vehicle, obstacles can be placed at different positions in a test area, and the test area is required to be positioned around the target vehicle and cover the radar detection range of the target vehicle, so that the radar of the target vehicle can determine the distance between the obstacles and the target vehicle, the playing frequency of repeated playing of the buzzes can be determined based on the distance, and the buzzes with different playing frequencies are generated to serve as alarm sounds to prompt a driver. Since the sound collector is located around the instrument panel in the target vehicle, the sound collector can continuously collect the sound signals in the target vehicle to obtain a plurality of alarm sound signals and send the plurality of alarm sound signals to the electronic device in the process of testing the parking assistance performance of the target vehicle.

In some embodiments, the target vehicle may generate the warning sound through a built-in buzzer, and of course, the target vehicle may also generate the warning sound through other manners, which is not limited in this application.

In some embodiments, in testing the parking assist performance of the target vehicle, an obstacle may be directly placed at any position within the radar detection range of the target vehicle, for example, the obstacle may be placed on the ground or suspended in the air. Since the distance between the obstacle and the target vehicle varies in a three-dimensional space, the distance between the obstacle and the target vehicle cannot be determined intuitively, and a tester needs to manually measure the straight-line distance between the obstacle and the target vehicle and determine the straight-line distance as the distance between the target vehicle and the obstacle. For example, referring to fig. 3, a is a target vehicle and B is an obstacle. At this time, the distance between the obstacle and the target vehicle is a straight-line distance AB between the obstacle B and the target vehicle a.

Since it is necessary to place obstacles at a plurality of different positions in the test area when performing the parking assistance performance test on the target vehicle, the above method requires a tester to manually measure the distance between the obstacle and the target vehicle a plurality of times, which makes the test process cumbersome and the distance manually measured by the tester may be inaccurate. In order to facilitate the determination of the distance between the obstacle and the target vehicle, the distance between the obstacle and the target vehicle may be changed in a certain plane, that is, in a case where the distance between the obstacle and the target vehicle is changed in a horizontal plane, the length direction of the obstacle may be perpendicular to the ground where the target vehicle is located, and the obstacle may be placed on the ground where the target vehicle is located.

For example, referring to fig. 4 and 5, fig. 4 is a left side view of the target vehicle and the obstacle, and fig. 5 is a top view of the target vehicle and the obstacle, and it can be seen from fig. 4 and 5 that the obstacle has a length direction perpendicular to the ground on which the target vehicle is located and is placed on the ground on which the target vehicle is located. The distance between the obstacle and the target vehicle may be directly determined as the horizontal distance NM between the obstacle and the target vehicle.

In the case where the distance between the obstacle and the target vehicle varies in the vertical plane, the length direction of the obstacle is parallel to the ground on which the target vehicle is located, and at this time, the distance between the obstacle and the target vehicle can be directly determined as the vertical distance between the obstacle and the target vehicle regardless of the variation in the placement position of the obstacle. The distance between the obstacle and the target vehicle can be accurately determined based on the position of the obstacle on the ground or the position of the obstacle in the direction perpendicular to the ground without the need for a tester to manually perform the measurement.

In addition, in the above method, since the distance between the obstacle and the target vehicle varies in a three-dimensional space, it is difficult to divide different test sub-areas in the three-dimensional space, and it is difficult to further determine the detection accuracy of the radar in the different test sub-areas in the subsequent steps. Therefore, if the distance between the obstacle and the target vehicle can be made to vary within a certain plane, at least one test sub-area can be determined based on the plane, and the test accuracy of the radar in different test areas can be further determined in subsequent steps. Therefore, in some embodiments, in testing the parking assist performance of the target vehicle, the tests may be divided into a radar horizontal detection performance test and a radar vertical detection performance test. Under the condition of testing the radar level detection performance of a target vehicle, a test area comprises a first test sub-area, a second test sub-area and a third test sub-area, the first test sub-area is located at the head of the target vehicle, the second test sub-area and the third test sub-area are located at the tail of the target vehicle, the area of the second test sub-area is larger than that of the third test sub-area, the length direction of an obstacle is perpendicular to the ground where the target vehicle is located, a first grid cloth is laid on the ground in the first test sub-area, a second grid cloth is laid on the ground in the second test sub-area and the third test sub-area, and multiple different positions are multiple different grids in the first grid cloth and the second grid cloth. Under the condition of testing the radar vertical detection performance of a target vehicle, a test area comprises a first test sub-area and a second test sub-area, the first test sub-area is located at the head of the target vehicle, the second test sub-area is located at the tail of the target vehicle, the length direction of an obstacle is parallel to the ground where the target vehicle is located, a third grid cloth is hung in the first test sub-area along the direction perpendicular to the ground, a fourth grid cloth is hung in the second test sub-area along the direction perpendicular to the ground, and a plurality of different positions are different grids in the third grid cloth and the fourth grid cloth.

Wherein, in the case of testing the radar level detection performance of the target vehicle, the length of the obstacle may be greater than the first length threshold. In the case of testing the radar vertical detection performance of the target vehicle, the length of the obstacle may be greater than the second length threshold, and the center line of the obstacle may coincide with the center line of the target vehicle. A first length threshold is set in advance, the first length threshold being related to the distance between the radar of the target vehicle and the ground. For example, in the case where the distance between the radar of the target vehicle and the ground is 0.5 m, the first length threshold may be set to 0.5 m. A second length threshold value is set in advance, and the second length threshold value is related to the distance between two radars at which the head or tail of the target vehicle is most distant from the installation position. For example, in the case where the distance between two radars at which the head or tail of the target vehicle is farthest from the installation position is 1.2 meters, the second length threshold value may be set to 1.2 meters.

The first mesh cloth, the second mesh cloth, the third mesh cloth and the fourth mesh cloth are used for helping a tester to determine the distance between the obstacle and the target vehicle. In some embodiments, the tester may determine the number of grids between the obstacle and the target vehicle based on the position where the obstacle is placed on the grid cloth, and may determine the distance between the obstacle and the target vehicle based on the size of the grids in the grid cloth and the number of grids between the obstacle and the target vehicle. For example, the sizes of the first mesh cloth, the second mesh cloth, the third mesh cloth and the fourth mesh cloth may be set to be rectangles with the length of 5 meters and the width of 4 meters, and the sizes of the meshes in the mesh cloths may be set to be squares with the side length of 100 millimeters.

It should be noted that, since the size and material of the geometric cross-sectional area of the obstacle may affect the radar reflection echo, when the parking assist performance of the target vehicle is tested, the determination of the geometric cross-sectional area and the material of the obstacle is related to the attribute of the radar of the target vehicle. As an example, the obstacle may be a test stick of 75 mm diameter with a geometric cross-sectional area of 1406.25 x pi square mm, made of PVC. Of course, the obstacle may be made of other materials and have a geometric cross-sectional area, which is not limited in the embodiments of the present application.

Because the target vehicle is provided with the first corresponding relation, when the parking assist performance of the target vehicle is tested, different positions in the radar detection range of the target vehicle need to be tested. Thus, in some embodiments, the plurality of different positions cover different detection ranges of the radar of the target vehicle, i.e. the plurality of different positions cover different range ranges in the first correspondence.

Step 202: the electronic equipment receives a plurality of images from the camera, the images correspond to a plurality of alarm sound signals one by one, the images are obtained by shooting an instrument panel after placing obstacles at a plurality of different positions, and the instrument panel is used for displaying the closest distance between the obstacles at the plurality of different positions and the radar of the target vehicle.

Based on the above description, in order to prevent the target vehicle from colliding with an obstacle while parking, the target vehicle may be equipped with a radar to detect the obstacle around the target vehicle, and besides the first corresponding relation, a second corresponding relation can be set in the target vehicle, the second corresponding relation is used for indicating the corresponding relation between the distance range and the distance mark, and when the distance ranges of the distances between the target vehicle and the obstacles are different, the distance marks displayed on the instrument panel of the target vehicle are also different, therefore, the target vehicle can display the corresponding distance mark in the second corresponding relation through the instrument panel based on the distance between the target vehicle and the obstacle detected by the radar so as to prompt the driver that the obstacle exists near the target vehicle, therefore, the risk of collision between the target vehicle and the obstacle during parking is reduced, and the parking assistance function of the target vehicle is realized.

In some embodiments, the head and tail of the target vehicle may be provided with the same second correspondence. In other embodiments, since the sight-line blind area of the head of the target vehicle is different from the sight-line blind area of the tail of the target vehicle for the driver, the head and the tail of the target vehicle may be set with different second correspondences. For example, the second correspondence relationship of the target vehicle head setting is as shown in table 3 below. When the distance between the obstacle and the target vehicle is equal to or greater than 25 cm and equal to or less than 35 cm, the distance displayed by the dashboard at this time is identified as the icon in the first row in table 3. When the distance between the obstacle and the target vehicle is equal to or greater than 40 cm and equal to or less than 60 cm, the distance displayed by the dashboard at this time is identified as an icon in the second row in table 3. When the distance between the obstacle and the target vehicle is 65 cm or more and 90 cm or less, the distance displayed by the dashboard at this time is identified as the icon of the third row in table 3. When the distance between the obstacle and the target vehicle is greater than 90 cm, the distance displayed by the instrument panel at this time is identified as the icon in the fourth row in table 3.

TABLE 3

For another example, the second correspondence relationship set in the rear of the target vehicle is shown in table 4 below. When the distance between the obstacle and the target vehicle is equal to or greater than 25 cm and equal to or less than 35 cm, the distance displayed by the dashboard at this time is identified as the icon in the first row in table 4. When the distance between the obstacle and the target vehicle is equal to or greater than 40 cm and equal to or less than 60 cm, the distance displayed by the dashboard at this time is identified as an icon in the second row in table 4. When the distance between the obstacle and the target vehicle is 65 cm or more and 90 cm or less, the distance displayed by the dashboard at this time is identified as the icon of the third row in table 4. When the distance between the obstacle and the target vehicle is 95 cm or more and 150 cm or less, the distance displayed on the dashboard at this time is identified as the icon in the fourth row in table 4. When the distance between the obstacle and the target vehicle is greater than 150 centimeters, the distance displayed by the dashboard at this time is identified as the icon of the fifth row in table 4.

TABLE 4

In order to test the parking assistance performance of the target vehicle, obstacles can be placed at different positions in a test area, the distance between the obstacle and the target vehicle can be determined by a radar of the target vehicle, a distance mark required to be displayed by an instrument panel can be further determined based on the distance, and then the corresponding distance mark is displayed by the instrument panel to prompt a driver. Since the shooting range of the camera covers the instrument panel of the target vehicle, the camera can shoot the display content of the instrument panel and send the shot image to the electronic equipment.

Step 203: the electronic device tests radar detection performance of the target vehicle based on the plurality of alarm sound signals and the plurality of images.

In some embodiments, the electronic device processes the plurality of warning sound signals and the plurality of images to determine a number of positions of the plurality of different positions that can be tested normally, divides the number of positions of the plurality of different positions that can be tested normally by a total number of the plurality of different positions to obtain a test coverage, and determines that the radar detection performance of the target vehicle meets the requirement if the test coverage is greater than a coverage threshold.

Based on the above description, placing an obstacle some distance around the target vehicle may cause the target vehicle to generate an alarm sound and display a corresponding distance indicator on the dashboard. Therefore, when the parking assist performance of the target vehicle is tested, the playing frequency of the buzzer in the warning sound signal can be determined based on the received warning sound signal, and the distance indicator displayed by the instrument panel can be determined based on the received image. Thus, in some embodiments, for a first warning sound signal of the plurality of warning sound signals, the first warning sound signal is audio processed to determine a play frequency of the beep in the first warning sound signal, for a first image of the plurality of images corresponding to the first warning sound signal, the first image is image recognized to determine a distance indicator in the first image, and if the play frequency of the beep in the first warning sound signal corresponds to the distance indicator in the first image and a correct test response by a tester is detected, the first position is determined to be a position enabling a normal test, the first position being a position where an obstacle was placed when the first warning sound signal was acquired. And if the playing frequency of the buzzer in the first alarm sound signal corresponds to the distance identifier in the first image and the wrong test response of the tester is detected, determining that the first position is a position incapable of being tested normally. And if the playing frequency of the buzzer in the first alarm sound signal does not correspond to the distance identifier in the first image, directly determining that the first position is a position which cannot be normally tested.

After each of the received plurality of warning sound signals and each of the plurality of images are analyzed in the above manner, a location that can be tested normally in a plurality of different locations can be determined.

Based on the above description, since the target vehicle is already provided with the first corresponding relationship and the second corresponding relationship before the target vehicle is tested, in order to make the testing process of the parking assist performance more convenient and efficient, the electronic device may also store the first corresponding relationship and the second corresponding relationship in advance, that is, the corresponding relationship among the distance range, the playing frequency of the buzzer and the distance identifier displayed by the dashboard. In this way, the electronic apparatus can determine whether the play frequency of the buzzer in the first warning sound signal and the distance indication in the first image correspond based on the pair of relationships.

Although the electronic device stores the corresponding relationship between the distance range, the playing frequency of the buzzer and the distance identifier displayed on the dashboard, because the electronic device only receives the warning sound signal and the image, that is, the electronic device only can determine the playing frequency of the buzzer in the warning sound signal and the distance identifier in the image, and cannot determine the distance between the current obstacle and the target vehicle, the electronic device only can determine whether the playing frequency of the buzzer in the first warning sound signal corresponds to the distance identifier in the first image, and cannot determine whether the playing frequency of the buzzer in the first warning sound signal and the distance identifier in the first image both correspond to the distance between the current obstacle and the target vehicle, therefore, the electronic device also needs to detect the correct test response of the tester, that is, when testing the parking assistance performance of the target vehicle, the tester is also required to determine whether the playing frequency of the beep in the first warning sound signal and the distance indication in the first image both correspond to the distance between the current obstacle and the target vehicle.

In some embodiments, the electronic device may display the playing frequency of the beep in the first warning sound signal and the distance indication in the first image, and display the correct test button and the incorrect test button. The tester may determine, based on the content displayed by the electronic device, whether the frequency of play of the beep in the first warning sound signal and the identification of the distance in the first image both correspond to the distance between the current obstacle and the target vehicle. If the playing frequency of the buzzer in the first alarm sound signal and the distance identification in the first image correspond to the distance between the current barrier and the target vehicle, a tester can click a correct test button, and then a correct test response can be triggered, and the electronic equipment can detect the correct test response of the tester at the moment. If the playing frequency of the buzzer in the first alarm sound signal and the distance identification in the first image do not completely correspond to the distance between the current obstacle and the target vehicle, the tester can click the error test button, and then an error test response can be triggered, and at the moment, the electronic equipment can detect the error test response of the tester.

If the playing frequency of the buzzer in the first warning sound signal corresponds to the distance identifier in the first image and the correct test response of the tester is detected, it is indicated that the playing frequency of the buzzer in the first warning sound signal, the distance identifier in the first image and the distance between the current obstacle and the target vehicle correspond to each other, that is, the first position is a position capable of being tested normally. If the playing frequency of the buzzer in the first warning sound signal corresponds to the distance identifier in the first image and the wrong test response of the tester is detected, it is indicated that the playing frequency of the buzzer in the first warning sound signal corresponds to the distance identifier in the first image, but the playing frequency of the buzzer in the first warning sound signal and the distance identifier in the first image do not completely correspond to the distance between the current obstacle and the target vehicle, that is, the first position is a position where the normal test cannot be performed.

If the playing frequency of the buzzer in the first alarm sound signal does not correspond to the distance identifier in the first image, the first position is the position which cannot be normally tested, and at the moment, whether correct test response of a tester is detected or not does not need to be determined, and the first position can be directly determined to be the position which cannot be normally tested.

In some embodiments, a derivative operation may be performed on the first warning sound signal, if data greater than 0 exists in the sound data after the derivative operation, two continuous maximum values in the sound data after the derivative operation are obtained, and a reciprocal of an absolute time difference between the two maximum values is determined as the playing frequency of the buzzer in the first warning sound signal. If the sound data after the derivative operation does not have data larger than 0, it is determined that the first alarm sound signal does not have a buzzer, that is, the target vehicle does not play the buzzer.

For example, in a case where, after the derivative operation is performed on the first warning sound signal, data larger than 0 exists in the sound data after the derivative operation, and the absolute time difference between two continuous maximum values in the sound data after the derivative operation is acquired is 250 milliseconds, the playback frequency of the buzzer sound in the first warning sound signal is determined to be 4 Hz.

In some embodiments, the number of positions in the plurality of different positions that can be normally tested may be directly divided by the total number of the plurality of different positions to obtain a test coverage, and if the test coverage is greater than a coverage threshold, the radar detection performance of the target vehicle is determined to meet the requirement. And if the test coverage rate is less than or equal to the coverage rate threshold value, determining that the radar detection performance of the target vehicle does not meet the requirement. That is, it is possible to determine whether the overall detection performance of the radar of the target vehicle satisfies the requirement by the above-described method.

But the risk of collision of the target vehicle with the obstacle is different due to the different distance between the target vehicle and the obstacle. Therefore, in order to further ensure driving safety, the detection coverage rate of the radar should be high for a distance at which the target vehicle is at a high risk of colliding with an obstacle, and the detection coverage rate of the radar may be low for a distance at which the target vehicle is at a low risk of colliding with an obstacle. On the basis of the method, whether the overall detection performance of the radar of the target vehicle meets the requirement or not is judged to be incomplete, so that the periphery of the target vehicle can be divided into different test sub-areas, and different coverage rate thresholds can be set for the different test sub-areas. Based on the above description, because it is difficult to divide different test sub-regions in the three-dimensional space, the parking assist performance test may be divided into a radar horizontal detection performance test and a radar vertical detection performance test, which correspond to different test sub-regions, respectively, and each test sub-region corresponds to a coverage rate threshold.

In some embodiments, as shown in table 5 below. In the case of testing the radar level detection performance of the target vehicle, the test area includes a first test sub-area, a second test sub-area, and a third test sub-area. The distance between the first test sub-area and the target vehicle is greater than a first distance threshold and less than a second distance threshold, the coverage threshold corresponding to the first test sub-area is a first coverage threshold, the distance between the second test sub-area and the target vehicle is greater than a second distance threshold and less than a third distance threshold, the coverage threshold corresponding to the second test sub-area is a second coverage threshold, the distance between the third test sub-area and the target vehicle is greater than the first distance threshold and less than a fourth distance threshold, and the coverage threshold corresponding to the third test sub-area is a third coverage threshold. In the case of testing the radar vertical detection performance of the target vehicle, the test area includes a first test sub-area and a second test sub-area. The distance between the first test sub-area and the target vehicle is greater than a first distance threshold and less than a second distance threshold, the coverage rate threshold corresponding to the first test sub-area is a fourth coverage rate threshold, the distance between the second test sub-area and the target vehicle is greater than the first distance threshold and less than the fourth distance threshold, and the coverage rate threshold corresponding to the second test sub-area is a fifth coverage rate threshold. The widths of the plurality of test sub-regions are equal and equal to a test region width threshold.

TABLE 5

Wherein a first distance threshold value is set in advance, which is related to the minimum detection distance of the radar of the target vehicle, for example, in case that the minimum detection distance of the radar of the target vehicle is 25 cm, the first distance threshold value may be set to 25 cm. The second distance threshold and the third distance threshold are set in advance, the second distance threshold and the third distance threshold are larger than the first distance threshold, and the third distance threshold is larger than the second distance threshold. For example, the second distance threshold may be set at 90 centimeters and the third distance threshold may be set at 150 centimeters. And under different conditions, the device can be adjusted according to different requirements. A fourth distance threshold is also set in advance, the fourth distance threshold being greater than the first distance threshold. For example, the fourth distance threshold may be set at 90 centimeters. And under different conditions, the device can be adjusted according to different requirements. The first coverage threshold, the second coverage threshold, the third coverage threshold, the fourth coverage threshold, and the fifth coverage threshold are also set in advance, for example, the first coverage threshold may be set to 0.95, the second coverage threshold may be set to 0.9, the third coverage threshold may be set to 0.9, the fourth coverage threshold may be set to 0.9, and the fifth coverage threshold may be set to 0.9. The test area width threshold is set in advance, and is larger than the body width of the target vehicle. For example, in the case where the body width of the target vehicle is 1.6 meters, the test area width threshold may be set to 2 meters.

As an example, please refer to fig. 6, fig. 6 is a schematic diagram of the division of the test area in the case of testing the radar level detection performance of the target vehicle. Since the minimum detection distance of the radar of the target vehicle is 25 cm, the first distance threshold is 25 cm. The target vehicle body width is 160 centimeters, so the test zone width threshold is 200 centimeters. The second distance threshold is 90 centimeters, the third distance threshold is 150 centimeters, and the fourth distance threshold is 90 centimeters. Therefore, for the tail of the target vehicle, the B1 area which is more than 25 centimeters and less than 90 centimeters away from the target vehicle is divided into a first test sub-area. The B2 area with the distance from the target vehicle being more than 90 cm and less than 150 cm is divided into a second test sub-area. For the head of the target vehicle, the a1 area, which is more than 25 cm and less than 90 cm away from the target vehicle, is divided into a third test sub-area.

In some embodiments, in a case where the parking assist performance test is divided into a radar horizontal detection performance test and a radar vertical detection performance test, if the radar horizontal detection performance test satisfies the requirement and the radar vertical detection performance test satisfies the requirement, the radar detection performance of the target vehicle is considered to satisfy the requirement. And if any one of the radar horizontal detection performance test and the radar vertical detection performance test does not meet the requirement, the radar detection performance of the target vehicle is considered to be not met.

And if the radar level detection performance test meets the requirement, the coverage rates of the first test sub-area, the second test sub-area and the third test sub-area are all larger than the coverage rate threshold corresponding to the test sub-area. If the radar level detection performance test does not meet the requirement, the coverage rate of at least one test sub-area in the first test sub-area, the second test sub-area and the third test sub-area is smaller than or equal to the coverage rate threshold corresponding to the test sub-area. And if the radar vertical detection performance test meets the requirement, the coverage rates of the first test subarea and the second test subarea are larger than the coverage rate threshold corresponding to the test subarea. And if the radar vertical detection performance test does not meet the requirement, indicating that the coverage rate of at least one test sub-area in the first test sub-area and the second test sub-area is less than or equal to the coverage rate threshold corresponding to the test sub-area.

During actual driving, the target vehicle may travel on a pothole section, and due to the uneven ground of the section, a parking assist system of the target vehicle may generate a false alarm, thereby causing a driver to feel panic. Therefore, in order to avoid such a situation, when the parking assist performance of the target vehicle is tested, it is also possible to determine whether the radar cutoff height of the target vehicle meets the requirement, that is, to determine whether the target vehicle will generate an alarm on uneven ground. In some embodiments, when the parking assist performance of the target vehicle is tested, gravel with the height within the height range is paved on the ground where the target vehicle is located, so that the driving state of the target vehicle on the hollow road section is simulated. At this time, in the case where the target vehicle is in a fully loaded state, if there is no buzzer sound in the warning sound signal from the sound collector and there is no distance flag in the image from the camera, it is determined that the radar cut-off height of the target vehicle satisfies the requirement. And if the buzzer does not exist in the alarm sound signals from the sound collector, but the distance identification exists in the images from the camera, determining that the radar cut-off height of the target vehicle does not meet the requirement. And if the buzzer sound exists in the alarm sound signal from the sound collector and the distance identification does not exist in the image from the camera, determining that the radar cut-off height of the target vehicle does not meet the requirement.

If no buzzing sound exists in the alarm sound signals from the sound collector and no distance identification exists in the images from the camera, the situation that the target vehicle does not have false alarm on the hollow road section is shown, and at the moment, the radar cut-off height of the target vehicle can be determined to meet the requirement. If the alarm sound signal from the sound collector does not contain the buzzing sound, but the image from the camera contains the distance mark, the situation that the target vehicle generates false alarm on the hollow road section is shown, and at the moment, the radar cut-off height of the target vehicle is determined to be not meet the requirement. If the alarm sound signal from the sound collector has buzzing sound and the image from the camera does not have distance identification, the target vehicle generates false alarm on the hollow road section, and at the moment, the radar cut-off height of the target vehicle is determined not to meet the requirement.

The radar cutoff height is a distance between the ground and a maximum boundary that can be detected by the radar in the direction toward the ground. The height range is determined based on the radar cut-off height of the target vehicle, the maximum value of which is smaller than the radar cut-off height of the target vehicle, for example, as shown in fig. 7, the radar cut-off height of the target vehicle is 50 mm, and at this time, the height range is determined to be 0 mm to 50 mm, and therefore, it is possible to lay crushed stones having a height of between 0 mm and 50 mm on the ground on which the target vehicle is located.

In further exemplary embodiments, the initialization behavior of the parking aid system can also be tested during the test of the parking aid behavior. At the moment, the parking auxiliary system of the target vehicle is connected with the current acquisition probe of the data acquisition instrument, the shooting range of the camera also covers the vehicle-mounted display screen of the target vehicle, and the gear shifting module of the target vehicle is connected with the switch acquisition device. At the moment, the electronic equipment receives a plurality of working currents acquired by the data acquisition instrument through the current acquisition probe, the working currents are currents of a target vehicle in a reverse gear after the whole vehicle is electrified for a plurality of times, a plurality of initialization times are determined through the switch acquisition instrument and the camera, the initialization times are initialization times of a parking auxiliary system of the target vehicle after the whole vehicle is electrified for a plurality of times, an average value of the working currents is determined as a system working current, an average value of the initialization times is determined as a system initialization time, and the electronic equipment tests the initialization performance of the parking auxiliary system of the target vehicle on the basis of the system working currents and the system initialization time.

And if the difference value between the system working current and the working current threshold value is smaller than a first difference threshold value and the system initialization time is smaller than or equal to an initialization time threshold value, determining that the initialization performance of the parking assist system meets the requirement. And if the difference value between the system working current and the working current threshold value is smaller than a first difference value threshold value, and the system initialization time is larger than an initialization time threshold value, determining that the initialization performance of the parking assist system does not meet the requirement. And if the difference value between the system working current and the working current threshold value is larger than a first difference value threshold value, and the system initialization time is smaller than or equal to an initialization time threshold value, determining that the initialization performance of the parking assist system does not meet the requirement. And if the difference value between the system working current and the working current threshold value is larger than a first difference value threshold value, and the system initialization time is larger than an initialization time threshold value, determining that the initialization performance of the parking assist system does not meet the requirement.

It should be noted that, the power-ON of the entire vehicle means that the power supply of the target vehicle is in an ON state, for example, the power supply gear is in an ON or READY gear. The multiple whole vehicle electrification can be M times of whole vehicle electrification, M is a preset numerical value, and the whole vehicle electrification can be adjusted according to different requirements under different conditions. For example, M may be set to 3.

Therefore, in some embodiments, for any one of multiple times of vehicle power-on, the electronic device receives and records an initial current collected by the data collector through the current collecting probe, where the initial current is a current that is not in a reverse gear position after the target vehicle is powered on, and the electronic device receives multiple reverse currents collected by the data collector through the current collecting probe, where the multiple reverse currents are currents collected by the current collecting probe when the target vehicle is in the reverse gear position after the target vehicle is powered on. And if the difference between the plurality of reverse currents and the initial current is larger than a first difference threshold value and the difference between the plurality of reverse currents is smaller than a second difference threshold value, determining any one of the plurality of reverse currents as the working current. Since the state of the parking assist system of the target vehicle just started may not be stable, and it is necessary to wait for the system to be stable, and then use the reverse current when the system is stable as the working current of the system, it may be determined that the system is in a stable state when the difference between the plurality of reverse currents is smaller than the second difference threshold.

In general, the target vehicle is in neutral after being powered on, so the initial current may be the current when the target vehicle is in neutral after the entire vehicle is powered on, and of course, the target vehicle may not be in neutral after being powered on, and the initial current may be the current when the target vehicle is in the current gear after the entire vehicle is powered on.

The first difference threshold is preset, and can be adjusted according to different requirements under different conditions. The second difference threshold is set in advance, and for example, the second difference threshold may be set to 2 ma. And under different conditions, the device can be adjusted according to different requirements. The initialization time threshold is also set in advance, and for example, the initialization time threshold may be set to 2 seconds. And under different conditions, the device can be adjusted according to different requirements. The plurality of reversing currents can be Q reversing currents, Q is a numerical value set in advance, and under different conditions, the plurality of reversing currents can be adjusted according to different requirements. For example, Q may be set to 100, that is, if the difference between the 100 reverse currents and the initial current is greater than a first difference threshold and the difference between the plurality of reverse currents is less than a second difference threshold, any one of the 100 reverse currents is determined as the operating current.

In some embodiments, the electronic device receives a plurality of shift signals acquired by the switch acquirer, the plurality of shift signals are shift signals acquired by a target vehicle after the target vehicle is powered on for a plurality of times, receives a plurality of reverse images from the camera, the plurality of reverse images are images of a vehicle-mounted display screen when the target vehicle is in a reverse gear after the target vehicle is powered on for a plurality of times, and if the plurality of shift signals are reverse signals and the plurality of reverse images all include a reverse image and a digital sign, the acquisition time of the plurality of shift signals is used as a start time, the acquisition time of the plurality of reverse images is used as an end time, and a time difference between the start time and the corresponding end time is determined to obtain a plurality of initialization times.

Because the initialization of the parking assist system of the target vehicle needs a certain time, the time when the image displayed by the vehicle-mounted display screen of the target vehicle comprises the reversing picture and the digital sign when the whole vehicle is in the reversing gear after being electrified can be used as the initialization end time of the system. The reversing picture is used for indicating whether a parking auxiliary system of the target vehicle is started or not, and the digital sign is used for testing whether the image processing software of the target vehicle can work normally or not. If the reversing image comprises the reversing picture and the digital sign, the parking assistance system of the target vehicle is started, and the image processing software can work normally, at this time, the initialization of the parking assistance system of the target vehicle can be determined to be finished, and the acquisition time of the reversing image is used as the finishing time. If the reversing image comprises the reversing picture but does not comprise the digital sign, the parking assistance system of the target vehicle is started, but the image processing software cannot work normally, at the moment, the initialization of the parking assistance system of the target vehicle is determined not to be finished, and the acquisition time of the reversing image is not taken as the finishing time. If the reversing image does not include the reversing picture but includes the digital sign, the fact that the parking assistance system of the target vehicle is abnormally started is indicated, but the image processing software can normally work, at the moment, the fact that the initialization of the parking assistance system of the target vehicle is not finished can be determined, and the acquisition time of the reversing image is not taken as the finishing time.

As an example, the digital sign may be a digital sign including the number 1234. Of course, the digital signage may also be digital signage including other numbers, and this is not limited in this embodiment of the application.

In some embodiments, since the target vehicle has a plurality of gears, in order to determine whether the target vehicle is in a reverse gear when tested, the electronic device stores a reverse gear signal corresponding to the reverse gear. After the electronic equipment receives the gear shifting signal collected by the switch collector, whether the gear shifting signal is the reverse gear signal or not is determined based on the stored reverse gear signal, and if the gear shifting signal is the reverse gear signal, the target vehicle can be determined to be in a reverse gear. If the shift signal is not a reverse signal, it may be determined that the target vehicle is not in reverse gear. For example, the switch collector may be interfaced with four-way switches of the shift module, which are SW1, SW2, SW3, and SW4, respectively. The electronic equipment receives the gear shifting signals collected by the switch collector and is a four-digit binary number, and the four-digit binary number corresponds to different gears of the target vehicle. The electronic device stores a reverse gear signal corresponding to a reverse gear, namely the electronic device stores a four-digit binary number (1100) corresponding to the reverse gear. At this time, if the electronic device receives a shift signal 0110 acquired by the switch acquirer, based on the stored reverse signal (1100), it may be determined that the shift signal is not a reverse signal, that is, the current target vehicle is not in a reverse gear.

In the embodiment of the application, after obstacles are placed at different positions around the target vehicle, the target vehicle can generate alarm sound, and the distance identification can be displayed through an instrument panel. Like this, sound collector can gather alarm sound signal and send alarm sound signal for electronic equipment, and simultaneously, the camera can shoot the distance sign that the panel board shows and send the image of shooing for electronic equipment. The electronic equipment tests the radar detection performance of the target vehicle based on the received sound alarm signals and the images, can find the problem of the parking auxiliary system in time, can accurately determine the specific distance range of the parking auxiliary system with the problem, and provides data support for the improvement of the distance measurement problem of the parking auxiliary system by technicians. In addition, the method provided by the embodiment of the application can also be used for testing whether the initialization performance of the parking auxiliary system meets the requirement or not, so that a tester can be helped to find the problems of the working current and the initialization time of the parking auxiliary system in time, the parking auxiliary performance test of the target vehicle is more comprehensive, and the potential safety hazard of the parking auxiliary system is further reduced.

Fig. 8 is a schematic structural diagram of a testing apparatus for auxiliary parking performance according to an embodiment of the present disclosure, where the testing apparatus for auxiliary parking performance may be implemented as part or all of an electronic device by software, hardware, or a combination of the two. Referring to fig. 8, the apparatus includes: a first receiving module 801, a second receiving module 802 and a first testing module 803.

The first receiving module 801 is configured to receive a plurality of alarm sound signals from a sound collector, where the plurality of alarm sound signals are collected after obstacles are placed at a plurality of different positions in a test area, the test area is located around a target vehicle and covers a radar detection range of the target vehicle, and the plurality of different positions cover different detection distances of a radar. For the detailed implementation process, reference is made to corresponding contents in the foregoing embodiments, and details are not repeated here.

The second receiving module 802 is configured to receive multiple images from the camera, where the multiple images correspond to multiple alarm sound signals one to one, and the multiple images are obtained by shooting an instrument panel after placing obstacles at multiple different positions, where the instrument panel is configured to display the closest distances between the obstacles at the multiple different positions and a radar of a target vehicle. For the detailed implementation process, reference is made to corresponding contents in the above embodiments, and details are not repeated here.

The first testing module 803 is configured to test the radar detection performance of the target vehicle based on the plurality of warning sound signals and the plurality of images. For the detailed implementation process, reference is made to corresponding contents in the above embodiments, and details are not repeated here.

Optionally, in the case of testing the radar level detection performance of the target vehicle, the test region includes a first test sub-region, a second test sub-region and a third test sub-region, the first test sub-region is located at the head of the target vehicle, the second test sub-region and the third test sub-region are located at the tail of the target vehicle, and the area of the second test sub-region is larger than that of the third test sub-region;

Optionally, in the case of testing the radar vertical detection performance of the target vehicle, the test area includes a first test sub-area and a second test sub-area, the first test sub-area is located at the head of the target vehicle, the second test sub-area is located at the tail of the target vehicle, the length direction of the obstacle is parallel to the ground where the target vehicle is located, a third mesh cloth is suspended in the first test sub-area along a direction perpendicular to the ground, a fourth mesh cloth is suspended in the second test sub-area along a direction perpendicular to the ground, and the different positions are different meshes in the third mesh cloth and the fourth mesh cloth.

Optionally, the first testing module 803 includes:

the processing unit is used for processing the plurality of alarm sound signals and the plurality of images so as to determine the number of positions which can be normally tested in a plurality of different positions;

and the determining unit is used for determining that the radar detection performance of the target vehicle meets the requirement if the test coverage rate is greater than the coverage rate threshold value.

the processing unit includes:

a processing subunit, configured to, for a first warning sound signal of the plurality of warning sound signals, perform audio processing on the first warning sound signal to determine a playing frequency of a buzzer in the first warning sound signal;

and the determining subunit is used for determining that the first position is a position capable of being normally tested if the playing frequency of the buzzer in the first alarm sound signal corresponds to the distance identifier in the first image and the correct test response of the tester is detected, wherein the first position is a position where the obstacle is placed when the first alarm sound signal is acquired.

Optionally, the processing subunit is specifically configured to:

performing derivative operation on the first alarm sound signal;

the reciprocal of the absolute time difference between the two maximum values is determined as the playing frequency of the beep in the first warning sound signal.

Optionally, gravels with the height within the height range are paved on the ground where the target vehicle is located, and the target vehicle is used for repeatedly playing buzzes to give an alarm when an obstacle within the radar detection range is detected;

the device also includes:

the first determining module is used for determining that the radar cut-off height of the target vehicle meets the requirement if no buzzing sound exists in the alarm sound signals from the sound collector and no distance mark exists in the images from the camera under the condition that the target vehicle is in a full-load state.

Optionally, a current collecting probe of a data collector is connected to a parking auxiliary system of the target vehicle, a shooting range of the camera also covers a vehicle-mounted display screen of the target vehicle, and a switch collector is connected to a gear shifting module of the target vehicle;

the device also includes:

the third receiving module is used for receiving a plurality of working currents acquired by the data acquisition instrument through the current acquisition probe, wherein the working currents are currents of a target vehicle in a reverse gear after the whole vehicle is electrified for a plurality of times;

the second determination module is used for determining a plurality of initialization times through the switch collector and the camera, wherein the initialization times are the time for initializing the parking auxiliary system after the target vehicle is electrified for a plurality of times;

Optionally, a digital sign is placed at the tail of the target vehicle;

the second determining module is specifically configured to:

receiving a plurality of gear shifting signals acquired by a switch acquisition device, wherein the plurality of gear shifting signals are acquired after a target vehicle is electrified for a plurality of times;

receiving a plurality of reversing images from a camera, wherein the reversing images are obtained by shooting a vehicle-mounted display screen when a target vehicle is in a reversing gear after the whole vehicle is electrified for a plurality of times;

if the plurality of gear shifting signals are all reverse gear signals and the plurality of reverse images comprise reverse images and digital signs, the acquisition time of the plurality of gear shifting signals is used as the starting time, the acquisition time of the plurality of reverse images is used as the ending time, and the time difference between the starting time and the corresponding ending time is determined so as to obtain a plurality of initialization times.

It should be noted that: in the test device for auxiliary parking performance provided in the above embodiment, only the division of the above functional modules is used for illustration when performing the test for auxiliary parking performance, and in practical application, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above described functions. In addition, the test device for the auxiliary parking performance provided by the embodiment and the test method for the auxiliary parking performance belong to the same concept, and specific implementation processes are detailed in the method embodiment and are not described again.

Fig. 9 is a block diagram of an electronic device 900 according to an embodiment of the present application. The electronic device 900 may be a portable mobile electronic device such as: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The electronic device 900 may also be referred to by other names such as user equipment, portable terminals, laptop terminals, desktop terminals, and the like.

In general, the electronic device 900 includes: a processor 901 and a memory 902.

Processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 901 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 901 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 901 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 901 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in the memory 902 is used to store at least one instruction for execution by the processor 901 to implement the method for testing parking assist performance provided by the method embodiments of the present application.

In some embodiments, the electronic device 900 may further optionally include: a peripheral interface 903 and at least one peripheral. The processor 901, memory 902, and peripheral interface 903 may be connected by buses or signal lines. Various peripheral devices may be connected to the peripheral interface 903 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 904, a touch display screen 905, a camera 906, an audio circuit 907, a positioning component 908, and a power supply 909.

The peripheral interface 903 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 901 and the memory 902. In some embodiments, the processor 901, memory 902, and peripheral interface 903 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 901, the memory 902 and the peripheral interface 903 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 904 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 904 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 904 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 904 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 904 may communicate with other electronic devices via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 904 may further include NFC (Near Field Communication) related circuits, which are not limited by the embodiments of the present application.

The display screen 905 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 905 is a touch display screen, the display screen 905 also has the ability to capture touch signals on or over the surface of the display screen 905. The touch signal may be input to the processor 901 as a control signal for processing. At this point, the display 905 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 905 may be one, providing the front panel of the electronic device 900; in other embodiments, the number of the display panels 905 may be at least two, and the at least two display panels are respectively disposed on different surfaces of the electronic device 900 or are in a folding design; in still other embodiments, the display 905 may be a flexible display disposed on a curved surface or on a folded surface of the electronic device 900. Even more, the display screen 905 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The Display panel 905 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 906 is used to capture images or video. Optionally, camera assembly 906 includes a front camera and a rear camera. Generally, a front camera is disposed on a front panel of an electronic apparatus, and a rear camera is disposed on a rear surface of the electronic apparatus. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 906 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

Audio circuit 907 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 901 for processing or inputting the electric signals to the radio frequency circuit 904 for realizing voice communication. For stereo capture or noise reduction purposes, the microphones may be multiple and located at different locations of the electronic device 900. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 901 or the radio frequency circuit 904 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuit 907 may also include a headphone jack.

The positioning component 908 is used to locate a current geographic Location of the electronic device 900 to implement navigation or LBS (Location Based Service). The Positioning component 908 may be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

The power supply 909 is used to supply power to various components in the electronic device 900. The power source 909 may be alternating current, direct current, disposable or rechargeable. When the power source 909 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the electronic device 900 also includes one or more sensors 910. The one or more sensors 910 include, but are not limited to: acceleration sensor 911, gyro sensor 912, pressure sensor 913, fingerprint sensor 914, optical sensor 915, and proximity sensor 916.

The acceleration sensor 911 may detect the magnitude of acceleration in three coordinate axes of a coordinate system established with the electronic device 900. For example, the acceleration sensor 911 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 901 can control the touch display 905 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 911. The acceleration sensor 911 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 912 may detect a body direction and a rotation angle of the electronic device 900, and the gyro sensor 912 may cooperate with the acceleration sensor 911 to acquire a 3D motion of the user on the electronic device 900. The processor 901 can implement the following functions according to the data collected by the gyro sensor 912: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

The pressure sensor 913 may be disposed on a side bezel of the electronic device 900 and/or underneath the touch display screen 905. When the pressure sensor 913 is disposed on the side frame of the electronic device 900, the user's holding signal of the electronic device 900 may be detected, and the processor 901 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 913. When the pressure sensor 913 is disposed at a lower layer of the touch display 905, the processor 901 controls the operability control on the UI interface according to the pressure operation of the user on the touch display 905. The operability control comprises at least one of a button control, a scroll bar control, an icon control, and a menu control.

The fingerprint sensor 914 is used for collecting a fingerprint of the user, and the processor 901 identifies the user according to the fingerprint collected by the fingerprint sensor 914, or the fingerprint sensor 914 identifies the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 901 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 914 may be disposed on the front, back, or side of the electronic device 900. When a physical button or vendor Logo is provided on the electronic device 900, the fingerprint sensor 914 may be integrated with the physical button or vendor Logo.

The optical sensor 915 is used to collect ambient light intensity. In one embodiment, the processor 901 may control the display brightness of the touch display 905 based on the ambient light intensity collected by the optical sensor 915. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 905 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 905 is turned down. In another embodiment, the processor 901 can also dynamically adjust the shooting parameters of the camera assembly 906 according to the ambient light intensity collected by the optical sensor 915.

The proximity sensor 916, also known as a distance sensor, is typically disposed on the front panel of the electronic device 900. The proximity sensor 916 is used to capture the distance between the user and the front of the electronic device 900. In one embodiment, when the proximity sensor 916 detects that the distance between the user and the front face of the electronic device 900 gradually decreases, the processor 901 controls the touch display 905 to switch from the bright screen state to the dark screen state; when the proximity sensor 916 detects that the distance between the user and the front surface of the electronic device 900 becomes gradually larger, the processor 901 controls the touch display 905 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 9 is not limiting to the electronic device 900 and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components may be used.

In some embodiments, a computer-readable storage medium is provided, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for testing the performance of the parking assistance in the above-described embodiments. For example, the computer readable storage medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

It is noted that the computer-readable storage medium referred to in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transitory storage medium.

It should be understood that all or part of the steps for implementing the above embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions may be stored in the computer readable storage medium described above.

That is, in some embodiments, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the method for testing the performance of a parking aid as described above.

It is to be understood that reference herein to "at least one" means one or more and "a plurality" means two or more. In the description of the embodiments of the present application, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It should be noted that the information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals referred to in the embodiments of the present application are authorized by the user or fully authorized by various parties, and the collection, use and processing of the relevant data need to comply with relevant laws and regulations and standards in relevant countries and regions. For example, the warning sound signal, the image shot by the camera, the working current and the gear shifting signal related to the embodiment of the application are obtained under the condition of full authorization.

The above-mentioned embodiments are provided not to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for testing auxiliary parking performance is characterized in that a sound collector is arranged around an instrument panel in a target vehicle to be tested, a camera is further arranged in the target vehicle, and the shooting range of the camera covers the instrument panel, and the method comprises the following steps:

2. The method of claim 1, wherein in a case where the radar level detection performance of the target vehicle is tested, the test region includes a first test sub-region, a second test sub-region, and a third test sub-region, the first test sub-region is located at a head of the target vehicle, the second test sub-region and the third test sub-region are located at a tail of the target vehicle, and an area of the second test sub-region is larger than an area of the third test sub-region;

3. The method according to claim 1, wherein in the case of testing the radar vertical detection performance of the target vehicle, the test area includes a first test sub-area and a second test sub-area, the first test sub-area is located at the head of the target vehicle, the second test sub-area is located at the tail of the target vehicle, the length direction of the obstacle is parallel to the ground where the target vehicle is located, a third mesh cloth is suspended in the first test sub-area in the direction perpendicular to the ground, a fourth mesh cloth is suspended in the second test sub-area in the direction perpendicular to the ground, and the different positions are different meshes in the third mesh cloth and the fourth mesh cloth.

4. The method of any one of claims 1-3, wherein the testing the radar detection performance of the target vehicle based on the plurality of warning sound signals and the plurality of images comprises:

5. The method of claim 4, wherein the target vehicle is configured to repeatedly play a beep to alert upon detection of an obstacle within the radar detection range;

for a first alarm sound signal of the plurality of alarm sound signals, audio processing the first alarm sound signal to determine a play frequency of the beep in the first alarm sound signal;

if the playing frequency of the buzzer in the first alarm sound signal corresponds to the distance identification in the first image and the correct test response of a tester is detected, determining that a first position is a position capable of being tested normally, wherein the first position is a placing position of the barrier when the first alarm sound signal is collected.

6. The method of claim 5, wherein the audio processing of the first warning sound signal to determine the frequency of the beep in the first warning sound signal comprises:

performing derivative operation on the first alarm sound signal;

7. The method of claim 1, wherein the target vehicle is located on the ground with gravel at a height within a height range, and the target vehicle is used to repeatedly play a buzzer to alarm when an obstacle within the radar detection range is detected; the method further comprises the following steps:

and under the condition that the target vehicle is in a full-load state, if no buzzing sound exists in the alarm sound signals from the sound collector and no distance mark exists in the images from the camera, determining that the radar cut-off height of the target vehicle meets the requirement.

8. The method as claimed in claim 1, wherein a current acquisition probe of a data acquisition instrument is connected to the parking assist system of the target vehicle, a shooting range of the camera also covers a vehicle-mounted display screen of the target vehicle, and a switch acquisition instrument is connected to a gear shifting module of the target vehicle; the method further comprises the following steps:

9. The method of claim 8, wherein a digital sign is placed at the tail of the target vehicle; the determining a plurality of initialization times through the switch collector and the camera includes:

10. An electronic device, characterized in that, a sound collector is arranged around a meter panel in a target vehicle to be tested, a camera is further arranged in the target vehicle, the shooting range of the camera covers the meter panel, the electronic device comprises a processor, and the processor is used for: