CN113640018A - Automobile tire envelope verification method, test bench and storage medium - Google Patents
Automobile tire envelope verification method, test bench and storage medium Download PDFInfo
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- CN113640018A CN113640018A CN202110917409.XA CN202110917409A CN113640018A CN 113640018 A CN113640018 A CN 113640018A CN 202110917409 A CN202110917409 A CN 202110917409A CN 113640018 A CN113640018 A CN 113640018A
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Abstract
The application discloses an automobile tire envelope verification method, a test bed and a storage medium, which are used for improving the accuracy of tire envelope verification. The method comprises the following steps: acquiring corresponding parameters of an automobile to be verified under the action of various preset simulation working conditions; outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise an acting force parameter and/or a driving parameter; acquiring distance information between the tire of the automobile to be verified and a specific part under the action of the parameters; and completing tire envelope verification of the automobile to be tested according to the distance information. By adopting the scheme provided by the application, the motion, stress and deformation conditions of parts such as the vehicle body, the auxiliary frame, the suspension and the tire under various working conditions can be truly reflected in the verification process, and the accuracy of tire envelope verification is improved.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to an automobile tire envelope verification method, a test bed and a storage medium.
Background
Tire envelope verification means that whether the tire has interference with peripheral parts or not in the process of various running conditions such as suspension jumping, vehicle turning, acceleration and deceleration, if the space is too small, the tire envelope verification is very important, and the tire envelope verification is unreasonable in arrangement and has interference risks such as friction and collision.
In the prior art, the current tire envelope is mainly verified in three-dimensional drawing software such as CATIA (computer-aided three-dimensional interactive application), and because the drawing software cannot consider the stress and deformation of parts such as a vehicle body, an auxiliary frame, a suspension frame and tires, the theoretical verification often has great difference with the actual state, so that the tire envelope verification result is inaccurate, and therefore, how to improve the accuracy of the tire envelope verification is a technical problem to be solved urgently.
Disclosure of Invention
The application provides an automobile tire envelope verification method, a test bed and a storage medium, which are used for improving the accuracy of tire envelope verification.
The application provides an automobile tire envelope verification method, which comprises the following steps:
acquiring corresponding parameters of an automobile to be verified under the action of various preset simulation working conditions;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise an acting force parameter and/or a driving parameter;
acquiring distance information between the tire of the automobile to be verified and a specific part under the action of the parameters;
and completing tire envelope verification of the automobile to be tested according to the distance information.
The beneficial effect of this application lies in: the method comprises the steps of outputting parameters corresponding to a target working condition to an automobile to be verified, obtaining distance information between the tire of the automobile and a specific part under the action of the parameters, and carrying out envelope verification based on the distance information between the tire and the part.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is a vertical jump working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
determining vertical displacement corresponding to the simulated vertical jump working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting acting force capable of enabling the automobile to be verified to perform vertical displacement to the automobile to be verified.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is a steering working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring a steering direction and a steering angle corresponding to the steering working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting driving parameters corresponding to the steering direction and the steering angle to the automobile to be verified.
In one embodiment, the outputting the driving parameters corresponding to the steering direction and the steering angle to the vehicle to be verified includes:
and sending a target instruction to a steering robot in the automobile cockpit to be verified so that the steering robot outputs driving parameters corresponding to the steering direction and the steering angle to a steering system of the automobile to be verified.
The beneficial effect of this embodiment lies in: can realize the output to vehicle driving parameter through the robot that is in the cockpit, the robot can control steering angle more accurately to the control accuracy of treating the verification car has been promoted.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is a braking working condition or a driving working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring the magnitude of braking force corresponding to the braking working condition or the magnitude of driving force corresponding to the driving working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting corresponding acting force to the automobile to be verified according to the braking force corresponding to the braking working condition or the driving force corresponding to the driving working condition.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is a lateral force working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring the direction and the size of the lateral force;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting acting force corresponding to the direction and the magnitude to the body of the automobile to be verified according to the direction and the magnitude of the lateral force.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is a vehicle body roll working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring a roll angle corresponding to the roll working condition of the vehicle body;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and adjusting the current angle of the vehicle body according to the roll angle.
In one embodiment, when the simulated preset working condition of the vehicle to be verified is the simultaneous existence of multiple preset working conditions, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
respectively acquiring multiple parameters corresponding to multiple simultaneous preset working conditions;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and simultaneously outputting a plurality of parameters corresponding to a plurality of simultaneously existing preset working conditions to the automobile to be verified.
The beneficial effect of this embodiment lies in, can consider multiple operating mode information simultaneously to the while to wait to verify the car output multiple simultaneous existence predetermine the multinomial parameter that the operating mode corresponds, make tire envelope verification process more be close to real driving scene, further promoted tire envelope verification's accuracy.
In one embodiment, obtaining information on the distance between the tire of the vehicle to be verified and the specific component under the action of the parameter comprises:
shooting image information of the tire and the specific part of the automobile to be verified under the action of the parameters through a camera;
obtaining the distance information between the tire of the automobile to be verified and a specific part according to the image information;
or
After outputting parameters corresponding to a target working condition, acquiring the minimum thickness of a plastic material preset between the automobile tire and a preset part;
and determining the minimum thickness information as the distance information between the tire of the automobile to be verified and a specific part.
The beneficial effect of this embodiment lies in: a plurality of modes for determining the distance information are provided, so that the distance information determining modes are more diversified.
In one embodiment, the performing tire envelope verification on the vehicle to be tested through the distance information includes:
judging whether the distance value recorded in the distance information is larger than a preset distance threshold value or not;
when the distance value recorded in the distance information is larger than a preset distance threshold value, determining that the tire envelope verification of the automobile to be tested passes;
and when the distance value recorded in the distance information is smaller than a preset distance threshold value, determining that the tire envelope verification of the automobile to be tested is not passed.
The present application further provides a test stand, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the one processor to implement the tire envelope verification method of any of the above embodiments.
The present application further provides a computer-readable storage medium, wherein when the instructions in the storage medium are executed by a processor corresponding to the test stand, the test stand is enabled to implement the tire envelope verification method described in any of the above embodiments.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present application is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the application and together with the description serve to explain the application and not limit the application. In the drawings:
fig. 1 is a flowchart of an automobile tire envelope verification method according to an embodiment of the present application;
fig. 2 is a flowchart of an automobile tire envelope verification method according to an embodiment of the present application;
fig. 3 is a flowchart of an automobile tire envelope verification method according to an embodiment of the present application;
fig. 4 is a flowchart of an automobile tire envelope verification method according to an embodiment of the present application;
fig. 5 is a flowchart of an automobile tire envelope verification method according to an embodiment of the present application;
fig. 6 is a schematic hardware structure diagram of a test bed according to an embodiment of the present application.
Detailed Description
The preferred embodiments of the present application will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein only to illustrate and explain the present application and not to limit the present application.
Fig. 1 is a flowchart of a vehicle tire envelope verification method according to an embodiment of the present application, and as shown in fig. 1, the method may be implemented as the following steps S11-S14:
in step S11, obtaining parameters corresponding to the vehicle to be verified under the action of various preset simulation conditions;
in step S12, outputting parameters corresponding to the target operating condition to the vehicle to be verified, where the parameters include an acting force parameter and/or a driving parameter;
in step S13, obtaining distance information between the tire of the vehicle to be verified and the specific component under the action of the parameters;
in step S14, tire envelope verification of the vehicle to be tested is completed by the distance information.
The execution body of the present application may be a KC test stand. The KC bench is a bench for measuring changes in K (Kinematic-Kinematic characteristics) and C (Compliance-elastic-Kinematic characteristics) characteristics of a suspension by using a test apparatus with left and right fixed wheel jounces.
The KC test bed can clamp and fix the vehicle body under a specific experimental load (such as a load), and then acting force (such as vertical force, lateral force, longitudinal force, side inclination angle and the like) and/or driving parameters are applied to the wheels and/or the whole vehicle through the test bed. The acting force and/or the driving parameters are all the acting force born or the received driving parameters under the condition of simulating the actual driving working conditions of various automobiles. The test bed can be divided into a ground moving type test bed and a vehicle body moving type test bed, and for the ground moving type test bed, a vehicle body is fixed, and then acting force is applied to the vehicle body through the movement of a platform bearing wheels in the test bed; in the vehicle body moving type test bed, after a vehicle body is fixed, a force is applied to the vehicle body through vehicle body loading equipment, and the platform for bearing the vehicle body applies the force to the vehicle body through the movement of the vehicle body.
Generally, in driving scenes such as pit crossing, slope climbing, sharp turning, and sudden braking of an automobile, distances between tires and peripheral components may change significantly, and therefore, it is necessary to consider the working conditions of the automobile in such driving scenes, for example, the working conditions of the automobile may include vertical jump, steering, driving, braking, curve driving, and roll. According to the method, the working conditions can be simulated, the corresponding parameters of the automobile under the action of different working conditions are obtained, and the parameters corresponding to the target working conditions are output to the automobile to be verified, wherein the parameters comprise acting force parameters and/or driving parameters;
in the following, examples are given for parameters under different working conditions and how to output corresponding parameters to the vehicle to be verified:
when the preset working condition of the simulated automobile to be verified is a vertical jump working condition, determining the vertical displacement corresponding to the simulated vertical jump working condition; and outputting acting force capable of enabling the automobile to be verified to vertically displace to the automobile to be verified. The vertical jump refers to the movement of a vehicle in a direction vertical to the ground, and the vertical jump working condition generally occurs when the vehicle goes up and down a slope, goes up and down steps and the like.
When the simulated preset working condition of the automobile to be verified is a steering working condition, acquiring a steering direction and a steering angle corresponding to the steering working condition; and outputting driving parameters corresponding to the steering direction and the steering angle to the automobile to be verified. Specifically, outputting driving parameters corresponding to the steering direction and the steering angle to the automobile to be verified includes: and transmitting a target instruction to the steering robot in the automobile cockpit to be verified so that the steering robot outputs driving parameters corresponding to the steering direction and the steering angle to a steering system of the automobile to be verified. Steering refers to the condition that the driving direction of a vehicle is adjusted in the driving process, and the condition can be continuously generated at any time in the driving process, for example, the steering condition of the vehicle can be generated under the conditions of fine adjustment of the direction, lane change and the like when the vehicle is normally driven on a vertical road surface.
When the simulated preset working condition of the automobile to be verified is a braking working condition or a driving working condition, acquiring the braking force corresponding to the braking working condition or the driving force corresponding to the driving working condition; and outputting corresponding acting force to the automobile to be verified according to the braking force corresponding to the braking working condition or the driving force corresponding to the driving working condition. Specifically, the braking condition usually occurs in a driving scene of deceleration and braking, and the driving occurs in a state of uniform speed or acceleration driving.
When the simulated preset working condition of the automobile to be verified is a lateral force working condition, acquiring the direction and the magnitude of a lateral force; and outputting corresponding acting force to the side surface of the automobile body of the automobile to be verified according to the bending degree and the automobile speed. Specifically, the side force condition occurs when the vehicle runs on a curved road, and in this case, the vehicle is subjected to the side friction provided by the ground so as to counteract the centrifugal force generated by the vehicle when the vehicle turns during the running on the curved road.
When the simulated preset working condition of the automobile to be verified is an automobile body rolling working condition, acquiring a roll angle corresponding to the automobile body rolling working condition; and adjusting the current angle of the vehicle body according to the roll angle. The working condition usually occurs under the condition that the vehicle is bent, when the vehicle is bent, the steering angle is input, the longitudinal driving force exists, the lateral force necessary for bending is generated, and the vehicle sound also generates the side-tipping angle, so that the bending is a typical driving scene with various different working conditions.
The above only describes the acting force or driving parameters of the vehicle body under a single working condition, and in an actual driving scene, the same driving scene may correspond to multiple working conditions at the same time. For example, the conditions corresponding to the vehicle pit-crossing scenario may include braking and vertical jump conditions, or may also include driving, vertical jump, and steering conditions, etc. For another example, when the vehicle passes a curve on a pothole road, besides the above working conditions corresponding to the pit-passing scene, the vehicle may further include a lateral force working condition and a roll working condition, that is, five working conditions listed in the present application all exist, and five types of parameters, that is, a vertical input (corresponding to a vertical jump working condition), a steering input (corresponding to a steering working condition), a longitudinal force input (corresponding to a driving working condition or a braking working condition), a lateral force input (corresponding to a lateral force working condition), and a roll angle input (corresponding to a roll working condition), need to be input to the vehicle at the same time. Therefore, in the specific simulation process, the condition that multiple preset working conditions exist simultaneously can be considered based on a specific driving scene. When the simulated preset working condition of the automobile to be verified is that multiple preset working conditions exist simultaneously, multiple parameters corresponding to the multiple simultaneously existing preset working conditions are respectively obtained; and simultaneously outputting a plurality of parameters corresponding to a plurality of simultaneously existing preset working conditions to the automobile to be verified.
Specifically, the tire envelope condition input table is shown in table 1 below:
TABLE 1
In the application, one or more working conditions corresponding to different driving scenes may be determined, a corresponding relationship between a specific driving scene and a preset simulation working condition may be stored in a processor of a test bed, when an instruction for performing a simulation operation on a specific driving scene is received, a tire envelope working condition input table as shown in table 1 may be generated, after the tire envelope working condition input table is generated, one or more preset simulation working conditions corresponding to the specific driving scene are determined according to the pre-stored corresponding relationship between the driving scene and the preset simulation working condition, and then, parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions are obtained according to the step S11; and after the parameters are determined, outputting the parameters corresponding to the target working condition to the automobile to be verified.
It is understood that the instruction for performing the simulation operation on the specific driving scenario may be input by the user, or may be implemented based on a certain trigger condition, for example, after the test bench detects the operation of clamping the vehicle body, the tire envelope verification is performed sequentially according to each driving scenario according to various driving scenarios input in advance.
In addition, the target operating condition may be a plurality of operating conditions, and the output parameter corresponding to the target operating condition refers to a limit parameter under the target operating condition, for example, in table 1 above, the droop operating condition includes an upward jump and a downward jump, the vertical input stroke is between 100% of the upward jump and 100% of the downward jump, and the ranges of a1 and a2 … … are [0, ± 100% ]. Assuming that the jump-up of the front wheels is 100%, two front wheels need to bear a force of 2.5g (or other values, the jump-up limits of different vehicles are different) together, wherein 1g is 1 time of wheel load, and then the corresponding parameter is 2.5g when the target working condition is the jump-up. And outputting a parameter corresponding to the target working condition to the automobile to be verified, namely outputting an acting force of 2.5g in the vertical direction to the front wheel of the automobile to be verified, so that the distance between the front wheel and the fender is reduced.
Second, in Table 1 above, the steering input is between 100% for left turn and 100% for right turn, B1, B2 … … range [0,. + -. 100% ], positive values indicate left turn and negative values indicate right turn. The longitudinal force input is usually in the range of 0 +/-1 g on the left side and the right side or in the range of negative value C1 and C2 … …, wherein the positive value represents the forward driving force, and the negative value represents the backward braking force so as to simulate the braking force or the driving force borne by the whole vehicle. The longitudinal force range may need to be adjusted as appropriate. The lateral force input is between + -1 g, with D1, D2 … … ranging from 0, + -1 g, with positive values indicating left and negative values indicating right. Where 1g is a wheel load of 1 and the tire and test stand adhesion coefficient is insufficient, the lateral force may be reduced as appropriate, e.g., 0.7 g. The roll angle input corresponds to the roll angle of the whole vehicle, the ranges of E1 and E2 … … are [0, +/-4.5 degrees ], a positive value represents the roll to the right, a negative value represents the roll to the left, and the maximum roll angle can be adjusted according to the requirement. The vertical input can be vertical displacement control, and can also be changed into vertical force control after the vertical force corresponding to the displacement is determined through tests. The lateral force and the longitudinal force are input into the working condition in the same way.
The 5 columns and 5 input conditions may exist simultaneously. For example, only when steering is input, the parking steering condition under the corresponding test load is simulated. Steering input is not required when the rear wheels are non-steerable. The vertical input (side-tipping input), the steering input, the lateral force input and the positive longitudinal force (driving force) input simulate the whole vehicle over-bending working condition. The braking condition in the curve of the whole vehicle is simulated when vertical input, steering input, lateral force input and negative longitudinal force (braking force) input are performed. And when the 5 input conditions exist, the working condition that the whole vehicle passes through the hollow curve is simulated. When the whole vehicle is tilted, the tilting input is more accurate than the vertical input for verifying the tilting, because the stabilizer bar can cause the vehicle wheel to generate additional changes such as toe-in, camber and the like.
It should be noted that the above description of A, B, C, D, E ranges is merely exemplary, and in fact, the above listed ranges may vary depending on the type of vehicle being tested, the internal standards of the enterprise, etc., for example, some vehicles may have roll angles in the range of 0, ± 7 °. Therefore, A, B, C, D, E specific values can be input according to actual needs, and can refer to relevant standards such as enterprise internal standards. And various working conditions of the whole vehicle can be measured according to simulation or actual objective so as to formulate corresponding parameter requirements.
After the step S12 is completed, obtaining distance information between the tire of the vehicle to be verified and the specific component under the action of the parameters; and completing tire envelope verification of the automobile to be tested through the distance information.
Specifically, when obtaining the distance information between the tire of the automobile to be verified and the specific component, the distance between the tire and the specific component may be directly measured by a vehicle tool such as a ruler. If the gap is too small, it is inconvenient to measure, or it is a place where the measurement is dangerous. It is possible to consider obtaining the distance by taking a picture with a camera and/or indirectly measuring with a plastic material such as plasticine.
When the image information is shot through the camera, the image information of the tire and the specific part of the automobile to be verified under the action of the parameters can be shot through the camera; obtaining distance information between the tire of the automobile to be verified and the specific part according to the image information;
when the distance is obtained by indirect measurement of plastic materials such as plasticine and the like, after parameters corresponding to the target working condition are output, the minimum thickness of the plastic materials preset between the automobile tire and the preset parts is obtained; and determining the minimum thickness information as the distance information between the tire of the automobile to be verified and the specific part. The plastic material may be plastic, rubber, plasticine, or the like, and in order to improve the verification accuracy, the plasticine or a plastic material similar to the plasticine may be preferably used as the plastic material in the present application, considering that the plasticity of the plastic material such as rubber, plastic, or the like is poor. The method is characterized in that plasticine and the like are adhered to a place needing to examine a gap, and then the thickness of the plasticine is measured to obtain the gap, wherein the gap can comprise the gap between a tire and each control arm, a steering tie rod, an auxiliary frame, a vehicle body longitudinal beam, a wheel cover, a fender and the like. The KC test stand can keep the corresponding position unchanged, such as the position of jumping up by 100% and turning to 100% is kept unchanged, and then the gap is measured. When the real-time measurement is inconvenient, plasticine and the like can be stuck to a place needing to examine the gap, and then the thickness of the plasticine is measured to obtain the gap.
The beneficial effect of this application lies in: the method comprises the steps of outputting parameters corresponding to a target working condition to an automobile to be verified, obtaining distance information between the tire of the automobile and a specific part under the action of the parameters, and carrying out envelope verification based on the distance information between the tire and the part.
In one embodiment, as shown in fig. 2, when the simulated preset condition of the vehicle to be verified is a droop condition, the step S11 may be implemented as the following step S111:
in step S111, determining a vertical displacement corresponding to the simulated vertical jump condition;
the above step S12 can be implemented as the following step S121:
in step S121, an acting force that enables the vehicle to be verified to vertically displace is output to the vehicle to be verified.
In the embodiment, when the simulated preset working condition of the automobile to be verified is the vertical jump working condition, the vertical displacement corresponding to the simulated vertical jump working condition is determined; and outputting acting force capable of enabling the automobile to be verified to vertically displace to the automobile to be verified. The vertical jump refers to the movement of a vehicle in a direction vertical to the ground, and the vertical jump working condition generally occurs when the vehicle goes up and down a slope, goes up and down steps and the like.
In one embodiment, as shown in fig. 3, when the simulated preset operating condition of the vehicle to be verified is a steering operating condition, the step S11 may be implemented as the following step S112:
in step S112, a steering direction and a steering angle corresponding to the steering condition are obtained;
the above step S12 can be implemented as the following step S122:
in step S122, driving parameters corresponding to the steering direction and the steering angle are output to the vehicle to be verified.
In the embodiment, when the simulated preset working condition of the automobile to be verified is the steering working condition, the steering direction and the steering angle corresponding to the steering working condition are obtained; and outputting driving parameters corresponding to the steering direction and the steering angle to the automobile to be verified. Specifically, steering refers to adjusting the driving direction of a vehicle during driving, and this condition occurs continuously at any time during driving, for example, the vehicle steering condition occurs in the case of fine adjustment of the direction, lane change, and the like during normal driving on a vertical road.
In one embodiment, outputting driving parameters corresponding to a steering direction and a steering angle to a vehicle to be verified comprises:
and transmitting a target instruction to the steering robot in the automobile cockpit to be verified so that the steering robot outputs driving parameters corresponding to the steering direction and the steering angle to a steering system of the automobile to be verified.
In the embodiment, the steering robot can be placed in the automobile cockpit to be verified, so that the vehicle driving parameters can be output through the robot in the cockpit, and a worker does not need to sit in the cockpit in the whole test process.
The beneficial effect of this embodiment lies in: can realize the output to vehicle driving parameter through the robot that is in the cockpit, the robot can control steering angle more accurately to the control accuracy of treating the verification car has been promoted.
In one embodiment, as shown in fig. 4, when the simulated preset condition of the vehicle to be verified is a braking condition or a driving condition, the step S11 may be implemented as the following step S113:
in step S113, the magnitude of the braking force corresponding to the braking condition or the magnitude of the driving force corresponding to the driving condition is obtained;
the above step S12 can be implemented as the following step S123:
in step S123, the acting force corresponding to the output of the vehicle to be verified is output according to the magnitude of the braking force corresponding to the braking condition or the magnitude of the driving force corresponding to the driving condition.
In the embodiment, when the simulated preset working condition of the automobile to be verified is a braking working condition or a driving working condition, the magnitude of braking force corresponding to the braking working condition or the magnitude of driving force corresponding to the driving working condition is obtained; and outputting corresponding acting force to the automobile to be verified according to the braking force corresponding to the braking working condition or the driving force corresponding to the driving working condition. Specifically, the braking condition usually occurs in a driving scene of deceleration and braking, and the driving occurs in a state of uniform speed or acceleration driving.
In one embodiment, when the simulated preset condition of the vehicle to be verified is a lateral force condition, the step S11 may be implemented as the following step a 1:
in step a1, acquiring the direction and the magnitude of the lateral force;
the above step S12 may be implemented as the following step a 2:
in step a2, a corresponding force is output to the body side of the vehicle to be verified according to the bending degree and the vehicle speed.
In the embodiment, when the simulated preset working condition of the automobile to be verified is a lateral force working condition, the direction and the size of the lateral force are obtained; and outputting corresponding acting force to the side surface of the automobile body of the automobile to be verified according to the bending degree and the automobile speed. Specifically, the side force condition occurs when the vehicle runs on a curved road, and in this case, the vehicle is subjected to the side friction provided by the ground so as to counteract the centrifugal force generated by the vehicle when the vehicle turns during the running on the curved road.
In one embodiment, when the simulated preset condition of the vehicle to be verified is a vehicle body rolling condition, the step S11 may be implemented as the following step B1:
in step B1, acquiring a roll angle corresponding to the roll working condition of the vehicle body;
the above step S12 may be implemented as the following step B2:
in step B2, the current angle of the vehicle body is adjusted according to the roll angle.
In the embodiment, when the simulated preset working condition of the automobile to be verified is the automobile body rolling working condition, the roll angle corresponding to the automobile body rolling working condition is obtained; and adjusting the current angle of the vehicle body according to the roll angle. The working condition usually occurs under the condition that the vehicle is bent, when the vehicle is bent, the steering angle is input, the longitudinal driving force exists, the lateral force necessary for bending is generated, and the vehicle sound also generates the side-tipping angle, so that the bending is a typical driving scene with various different working conditions.
In one embodiment, as shown in fig. 5, when the plurality of preset operation conditions of the simulated vehicle to be verified coexist, the step S11 may be implemented as the following step S51:
in step S51, acquiring multiple parameters corresponding to multiple simultaneous preset conditions;
the above step S12 may be implemented as the following step S52:
in step S52, a plurality of parameters corresponding to a plurality of preset operating conditions existing at the same time are output to the vehicle to be verified.
The same driving scene may correspond to multiple operating conditions simultaneously. Therefore, in the embodiment, multiple parameters corresponding to multiple simultaneous preset working conditions are respectively obtained; and simultaneously outputting a plurality of parameters corresponding to a plurality of simultaneously existing preset working conditions to the automobile to be verified. For example, the conditions corresponding to the vehicle pit-crossing scenario may include braking and vertical jump conditions, or may also include driving, vertical jump, and steering conditions, etc. For another example, when a road in a pothole is curved, besides the above working conditions corresponding to the pothole passing scene, the lateral force working condition and the roll working condition may also be included, that is, five working conditions listed in the present application all exist, and five types of parameters need to be input to the vehicle at the same time. The specific implementation manner has been described in the embodiments corresponding to steps S11-S14, and is not described herein again.
The beneficial effect of this embodiment lies in, can consider multiple operating mode information simultaneously to the multiple parameter that the preset operating mode that to wait to verify the car output multiple coexistence simultaneously corresponds makes tire envelope verification process more approximate real driving scene, has further promoted tire envelope verification's accuracy.
In one embodiment, the above step S13 may be implemented as the following steps C1-C2 or C3-C4:
in step C1, shooting image information of the tire and the specific part of the automobile to be verified under the action of the parameters through a camera;
in step C2, obtaining distance information between the tire of the vehicle to be verified and the specific component according to the image information;
in step C3, after outputting the parameter corresponding to the target operating condition, acquiring the minimum thickness of the plastic material preset between the automobile tire and the preset part;
in step C4, the minimum thickness information is determined as the distance information between the tire of the vehicle to be verified and the specific part.
In the embodiment, the image information of the tire and the specific part of the automobile to be verified under the action of the parameters can be shot through the camera, and the distance information between the tire and the specific part of the automobile to be verified is obtained according to the image information.
Specifically, in the test, the clearance and the interference condition between the tire and the surrounding parts can be observed and recorded in real time by means of equipment such as a camera and the like, wherein the clearance and the interference condition comprise the tire and each control arm (rod system), a steering tie rod, an auxiliary frame, a brake hose, a body longitudinal beam, a wheel cover, a fender and the like, and the clearance and the interference condition between each part in a suspension and a transmission can also be examined. The KC stand can be held in a position, for example, it can be held stationary at the position of 100% jump and 100% turn, and then the gap is measured.
Secondly, in this embodiment, the minimum thickness of the plastic material preset between the automobile tire and the preset part can be obtained after outputting the parameter corresponding to the target working condition; and determining the minimum thickness information as the distance information between the tire of the automobile to be verified and the specific part. The plastic material can be plastic, rubber, plasticine and the like, and the plasticine can be selected as the plastic material in the application in order to improve the verification accuracy in consideration of poor plasticity of the plastic materials such as the rubber and the plastic. The rubber paste is stuck to a place where the clearance needs to be checked, and then the thickness of the rubber paste is measured to obtain the clearance. The device comprises a tire, control arms, a steering tie rod, an auxiliary frame, a vehicle body longitudinal beam, a wheel cover and a fender. The KC test stand can keep the corresponding position unchanged, such as the position of jumping up by 100% and turning to 100% is kept unchanged, and then the gap is measured. When the real-time measurement is inconvenient, plasticine and the like can be stuck to a place needing to examine the gap, and then the thickness of the plasticine is measured to obtain the gap.
The beneficial effect of this embodiment lies in: a plurality of modes for determining the distance information are provided, so that the distance information determining modes are more diversified.
In one embodiment, the above step S14 can be implemented as the following steps D1-D3:
in step D1, it is determined whether the distance value recorded in the distance information is greater than a preset distance threshold;
in step D2, when the distance value recorded in the distance information is greater than the preset distance threshold, determining that the tire envelope verification of the vehicle to be tested passes;
in step D3, when the distance value recorded in the distance information is smaller than the preset distance threshold, it is determined that the tire envelope verification of the vehicle to be tested is not passed.
Fig. 6 is a schematic diagram of a hardware structure of a test bed 600 according to the present application, including:
at least one processor 602; and the number of the first and second groups,
a memory 604 communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the one processor to implement the tire envelope verification method of any of the above embodiments.
Referring to fig. 6, the test stand 600 may include one or more of the following components: processing component 602, memory 604, power component 606, multimedia component 608, audio component 610, input/output (I/O) interface 612, sensor component 614, and communication component 616.
The processing component 602 generally controls the overall operation of the test stand 600. The processing component 602 may include one or more processors 620 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.
The multimedia component 608 includes a screen that provides an output interface between the test stand 600 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 may also include a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the test stand 600 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 610 is configured to output and/or input audio signals. For example, the audio component 610 includes a Microphone (MIC) configured to receive external audio signals when the test stand 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 604 or transmitted via the communication component 616. In some embodiments, audio component 610 further includes a speaker for outputting audio signals.
The I/O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 614 includes one or more sensors for providing various aspects of condition assessment for the test stand 600. For example, the sensor component 614 may include an acoustic sensor. In addition, the sensor assembly 614 may detect the open/closed status of the test stand 600, the relative positioning of the components, such as the display and keypad of the test stand 600, the sensor assembly 614 may also detect a change in the position of the test stand 600 or a component of the test stand 600, the presence or absence of user contact with the test stand 600, the orientation or acceleration/deceleration of the test stand 600, and a change in the temperature of the test stand 600. The sensor assembly 614 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 616 is configured to enable the test stand 600 to provide wired or wireless communication capabilities with other devices and cloud platforms. The test stand 600 may have access to a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, test stand 600 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the vehicle tire envelope verification methods described above.
The present application further provides a computer-readable storage medium, wherein when the instructions in the storage medium are executed by a processor corresponding to the test stand, the test stand is enabled to implement the tire envelope verification method described in any of the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A vehicle tire envelope verification method, comprising:
acquiring corresponding parameters of an automobile to be verified under the action of various preset simulation working conditions;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise an acting force parameter and/or a driving parameter;
acquiring distance information between the tire of the automobile to be verified and a specific part under the action of the parameters;
and completing tire envelope verification of the automobile to be tested according to the distance information.
2. The method according to claim 1, wherein when the simulated preset working condition of the vehicle to be verified is a vertical jump working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
determining vertical displacement corresponding to the simulated vertical jump working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting acting force capable of enabling the automobile to be verified to perform vertical displacement to the automobile to be verified.
3. The method of claim 1, wherein when the simulated preset working condition of the vehicle to be verified is a steering working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring a steering direction and a steering angle corresponding to the steering working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting driving parameters corresponding to the steering direction and the steering angle to the automobile to be verified.
4. The method according to claim 1, wherein when the simulated preset working condition of the vehicle to be verified is a braking working condition or a driving working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring the magnitude of braking force corresponding to the braking working condition or the magnitude of driving force corresponding to the driving working condition;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting corresponding acting force to the automobile to be verified according to the braking force corresponding to the braking working condition or the driving force corresponding to the driving working condition.
5. The method of claim 1, wherein when the simulated preset working condition of the vehicle to be verified is a lateral force working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring the direction and the size of the lateral force;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and outputting acting force corresponding to the direction and the magnitude to the body of the automobile to be verified according to the direction and the magnitude of the lateral force.
6. The method of claim 1, wherein when the simulated preset working condition of the vehicle to be verified is a vehicle body rolling working condition, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
acquiring a roll angle corresponding to the roll working condition of the vehicle body;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and adjusting the current angle of the vehicle body according to the roll angle.
7. The method according to claim 1, wherein when the simulated preset working condition of the vehicle to be verified exists simultaneously in multiple preset working conditions, acquiring parameters corresponding to the vehicle to be verified under the action of various preset simulation working conditions, including:
respectively acquiring multiple parameters corresponding to multiple simultaneous preset working conditions;
outputting parameters corresponding to the target working condition to the automobile to be verified, wherein the parameters comprise:
and simultaneously outputting a plurality of parameters corresponding to a plurality of simultaneously existing preset working conditions to the automobile to be verified.
8. The method according to any one of claims 1 to 7, wherein obtaining information on the distance between the tyre and the specific component of the vehicle to be verified under the action of the parameters comprises:
shooting image information of the tire and the specific part of the automobile to be verified under the action of the parameters through a camera;
obtaining the distance information between the tire of the automobile to be verified and a specific part according to the image information;
or
After outputting parameters corresponding to a target working condition, acquiring the minimum thickness of a plastic material preset between the automobile tire and a preset part;
and determining the minimum thickness information as the distance information between the tire of the automobile to be verified and a specific part.
9. A test stand, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the one processor to perform the method of any one of claims 1-8.
10. A computer-readable storage medium, wherein instructions in the storage medium, when executed by a corresponding processor of a test stand, enable the test stand to implement the method of any one of claims 1-8.
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| CN202110917409.XA CN113640018A (en) | 2021-08-11 | 2021-08-11 | Automobile tire envelope verification method, test bench and storage medium |
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| CN202110917409.XA CN113640018A (en) | 2021-08-11 | 2021-08-11 | Automobile tire envelope verification method, test bench and storage medium |
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