CN112906138B - Method, device, equipment and storage medium for acquiring air resistance energy for closing vehicle door - Google Patents
Method, device, equipment and storage medium for acquiring air resistance energy for closing vehicle door Download PDFInfo
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Abstract
The invention discloses a method, a device, equipment and a storage medium for acquiring air resistance energy for closing a vehicle door. The method comprises the following steps: acquiring a pressure curve of air pressure variation of the vehicle door along with time in the closing process of the vehicle door; converting a pressure curve of air pressure borne by the vehicle door along with time change into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door according to a preset conversion strategy; and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area. By the method, the pressure curve of the air pressure on the inner surface of the vehicle door, which changes along with time, is obtained, the moment curve of the equivalent moment, which changes along with the closing angle of the vehicle door, is converted, the equivalent area under the curve is determined according to the curve and the boundary, and the energy consumed by the air resistance in the vehicle cabin when the vehicle door is closed acts on the inner surface of the vehicle door is obtained, so that the problem that the energy consumed by the air resistance in the vehicle door closing cabin is difficult to accurately obtain in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method, a device and equipment for acquiring air resistance energy for closing a vehicle door and a storage medium.
Background
With the development of the automobile industry, the requirements on the closing performance of the automobile door are also higher, and indexes for evaluating the closing performance of the automobile door mainly comprise the minimum closing speed of the automobile door, the minimum closing force of the automobile door, the minimum closing energy of the automobile door and the like. The minimum closing energy of the vehicle door comprises information of closing force and displacement of the vehicle door, and the index of closing performance of the vehicle door is accurately embodied.
The air resistance energy in the vehicle is the most main part of the minimum closing energy of the vehicle door, and is related to the volume in the vehicle cabin, the area of the vehicle door, the exhaust flow of the vehicle body pressure relief valve and the closing speed of the vehicle door, so that the accurate energy consumed by the air resistance in the vehicle cabin in the closing process of the vehicle door is generally difficult to obtain.
The following method is generally adopted in the prior art for obtaining the energy consumed by air resistance in a door closing cabin: under the same condition, the energy consumed by the air resistance of the vehicle cabin on the inner surface of the vehicle door is obtained by measuring the closing energy of the vehicle door under the two working conditions of whether the air resistance of the vehicle cabin exists or not and calculating the difference value of the closing energy of the vehicle door under the two working conditions, and the working condition without the air resistance of the vehicle cabin is obtained by opening the opposite side vehicle door or other vehicle doors or lowering the vehicle window in the closing process of the vehicle door under the general condition. However, the conditions without air resistance in the cabin obtained in this way are actually also air-resistant. Therefore, by adopting the method, the influence of the air resistance in the vehicle cabin is difficult to be eliminated, and the energy consumed by the air resistance in the closed cabin of the vehicle door is difficult to be accurately acquired.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for acquiring air resistance energy for closing a vehicle door, and aims to solve the technical problem that the energy consumed by the air resistance in a vehicle door closing cabin is difficult to accurately acquire in the prior art.
In order to achieve the above object, the present invention provides a vehicle door closing air resistance energy obtaining method, comprising the steps of:
acquiring a pressure curve of air pressure variation of the vehicle door along with time in the closing process of the vehicle door;
converting a pressure curve of air pressure borne by the vehicle door, which changes along with time, into a moment curve of equivalent moment, which changes along with the closing angle of the vehicle door, according to a preset conversion strategy;
and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area.
Optionally, the converting, according to a preset conversion strategy, the pressure curve of the air pressure applied to the vehicle door with time change to a moment curve of the equivalent moment with the closing angle of the vehicle door, includes:
Converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time;
acquiring the angular speed of the rotation of the vehicle door around the hinge axis;
and converting the moment curve of the equivalent moment changing along with time into the moment curve of the equivalent moment changing along with the closing angle of the vehicle door according to the angular speed.
Optionally, the converting the pressure curve of the air pressure of the vehicle door with time to the moment curve of the equivalent moment with time includes:
the pressure borne by the vehicle door is equivalent to the mass center of the vehicle door, and the distance between the mass center of the vehicle door and the axis of the hinge is obtained;
and converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time according to the distance.
Optionally, the acquiring the pressure curve of the air pressure applied to the vehicle door with time during the closing process of the vehicle door includes:
acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time in the closing process of the vehicle door;
and summarizing pressure curves of air pressure of a plurality of areas of the vehicle door, which change along with time, so as to obtain the pressure curves of the air pressure of the vehicle door, which change along with time.
Optionally, the acquiring a pressure curve of air pressure variation with time of a plurality of areas of the vehicle door during the closing process of the vehicle door includes:
and in the process of closing the vehicle door, acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time according to a plurality of air pressure sensors arranged on the inner surface of the vehicle door, wherein the plurality of air pressure sensors are arranged in an array type in a grid area of the inner surface of the vehicle door.
Optionally, the method further includes, after calculating the equivalent area according to the moment curve and the boundary of the equivalent moment changing with the closing angle of the vehicle door and determining the air resistance energy according to the equivalent area:
acquiring a preset energy range and a preset pressure range from a preset storage area;
judging whether the air resistance energy belongs to the preset energy range or not;
judging whether the pressure born by the vehicle door belongs to the preset pressure range according to a pressure curve of the air pressure born by the vehicle door, which changes along with time;
and when the air resistance energy belongs to the preset energy range and the pressure born by the vehicle door belongs to the preset pressure range, judging that the current design parameters of the vehicle door are qualified.
Optionally, after the determining whether the pressure applied to the vehicle door belongs to the preset pressure range according to the pressure curve of the air pressure applied to the vehicle door over time, the method further includes:
and when the air resistance energy does not belong to the preset energy range or the pressure born by the vehicle door does not belong to the preset pressure range, adjusting the related design parameters of the vehicle door.
In addition, in order to achieve the above object, the present invention also proposes a door closing air resistance energy obtaining apparatus including:
the acquisition module is used for acquiring a pressure curve of air pressure variation of the vehicle door along with time in the closing process of the vehicle door;
the conversion module is used for converting a pressure curve of air pressure born by the vehicle door, which changes along with time, into a moment curve of equivalent moment, which changes along with the closing angle of the vehicle door, according to a preset conversion strategy;
and the calculation module is used for calculating the equivalent area according to the moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining the air resistance energy according to the equivalent area.
In addition, in order to achieve the above object, the present invention also proposes a door closing air resistance energy obtaining apparatus including: a memory, a processor, and a door closing air resistance energy harvesting program stored on the memory and executable on the processor, the door closing air resistance energy harvesting program configured to implement the steps of the door closing air resistance energy harvesting method as described above.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a door closing air resistance energy obtaining program which, when executed by a processor, implements the steps of the door closing air resistance energy obtaining method as described above.
According to the invention, the pressure curve of the air pressure of the vehicle door along with the time change is obtained in the closing process of the vehicle door; converting a pressure curve of air pressure borne by the vehicle door along with time change into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door according to a preset conversion strategy; and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area. By the method, the pressure curve of the air pressure on the inner surface of the vehicle door, which changes along with time, is obtained, the moment curve of the equivalent moment, which changes along with the closing angle of the vehicle door, is converted, the equivalent area under the curve is determined according to the curve and the boundary, and the energy consumed by the air resistance in the vehicle cabin when the vehicle door is closed acting on the inner surface of the vehicle door is obtained, so that the problems that the factors such as the volume in the vehicle cabin, the area of the vehicle door, the exhaust flow of the vehicle body pressure relief valve, the air tightness of the vehicle body and the like cannot be obtained or the influence on the energy consumed by determining the air resistance in the vehicle cabin in the closing process of the vehicle door is not determined are effectively avoided, and the problem that the energy consumed by the air resistance in the vehicle door closing cabin is difficult to accurately obtained in the prior art is solved. The energy consumed by the air resistance in the cabin in the closing process of the vehicle door can provide reliable basis for researching, designing and developing the closing energy of the vehicle door, and provide favorable reference data for improving the closing performance of the vehicle door.
Drawings
FIG. 1 is a schematic diagram of a door closing air resistance energy harvesting device of a hardware operating environment in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a method for acquiring air resistance energy for closing a vehicle door according to the present invention;
FIG. 3 is a schematic view of a door closing structure according to an embodiment of the method for acquiring energy of air resistance for closing a door of the present invention;
FIG. 4 is a schematic diagram of an equivalent area of an embodiment of a method for acquiring air resistance energy for closing a vehicle door according to the present invention;
FIG. 5 is a schematic flow chart of a second embodiment of a method for acquiring air resistance energy for closing a vehicle door according to the present invention;
FIG. 6 is a schematic diagram of a door sensor layout of an embodiment of a method for acquiring energy of air resistance to door closing according to the present invention;
fig. 7 is a block diagram showing the construction of a first embodiment of the door closing air resistance energy obtaining apparatus of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a structure of a door closing air resistance energy obtaining apparatus in a hardware operation environment according to an embodiment of the present invention.
As shown in fig. 1, the door closing air resistance energy acquisition apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the door closing air resistance energy harvesting device, and may include more or fewer components than shown, or certain components in combination, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a door closing air resistance energy acquisition program may be included in the memory 1005 as one type of storage medium.
In the door closing air resistance energy obtaining apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the vehicle door closing air resistance energy obtaining apparatus of the present invention may be provided in the vehicle door closing air resistance energy obtaining apparatus, and the vehicle door closing air resistance energy obtaining apparatus invokes, through the processor 1001, the vehicle door closing air resistance energy obtaining program stored in the memory 1005, and executes the vehicle door closing air resistance energy obtaining method provided by the embodiment of the present invention.
An embodiment of the invention provides a method for acquiring air resistance energy for closing a vehicle door, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for acquiring air resistance energy for closing a vehicle door.
In this embodiment, the method for acquiring the air resistance energy for closing the vehicle door includes the following steps:
step S10: and acquiring a pressure curve of air pressure applied to the vehicle door along with time change in the process of closing the vehicle door.
It may be understood that the execution body of the embodiment is a vehicle door closing air resistance energy obtaining device, and the vehicle door closing air resistance energy obtaining device may be a device such as a computer and a server, or may be other devices with the same or similar functions, where the vehicle door closing air resistance energy obtaining device is at least connected to a memory, and is configured to store relevant parameters in the vehicle door closing air resistance energy obtaining process.
On the one hand, when the upper peak value, the lower peak value and the change rate of the air pressure fluctuation exceed a certain threshold value, the discomfort of pressing ears can be generated by personnel in the cabin, and the air pressure in the cabin is reduced. On the other hand, the minimum door closing energy is an index for evaluating the door closing performance, and the minimum door closing energy refers to the minimum energy which is ensured to be closed after the kinetic energy applied to the door at the initial position is used for overcoming the energy consumed in the closing process of the door, and the consumed energy generally comprises the following parts: compression deformation potential energy of a vehicle door sealing strip, gravitational potential energy of the vehicle door, air compression potential energy in the vehicle, air resistance energy in a sealing strip bubble tube, energy consumed by a vehicle door limiter, energy consumed by friction in the closing process of the vehicle door and the like. In the process of closing the vehicle door, the inner surface of the vehicle door is acted by air pressure, the work done by external force on the vehicle door needs to overcome the air pressure consumption energy of the inner surface of the vehicle door to ensure that the vehicle door is closed, so that the energy consumed by air resistance (air compression potential energy in the vehicle) is one main part of the minimum vehicle door closing energy, the energy consumed by air resistance is related to the volume in a vehicle cabin, the area of the vehicle door, the exhaust flow of a vehicle body pressure relief valve and the closing speed of the vehicle door, and the accuracy of the energy consumed by the acquired air resistance cannot be ensured by acquiring the volume in the vehicle cabin, the area of the vehicle door, the exhaust flow of the vehicle body pressure relief valve and the closing speed of the vehicle door.
It will be appreciated that referring to fig. 3, fig. 3 is a schematic diagram of a door closing structure of an embodiment of a method for acquiring air resistance energy for closing a door of the present invention, in which a door 1 is suspended from a vehicle body 3 by a door hinge 2, and the door 1 is closed by rotating the door 1 about a hinge axis 4 toward the vehicle body 3.
In the specific implementation, during the rotation of the door around the hinge axis to the car body, part of air in the car cabin is discharged from a gap between the door outline and the door opening of the car body and a car body pressure relief valve, and the rest air in the car cabin is compressed to gradually increase the air pressure in the car cabin. I.e. the air pressure in the cabin is changing over time during the closing of the door.
In the concrete implementation, in the closing process of the vehicle door, an air pressure value corresponding to the action of the air pressure in the cabin on the inner surface of the vehicle door is obtained through an air pressure sensor arranged on the vehicle door, and the time and the air pressure value corresponding to one are obtained and recorded in real time, so that a pressure curve of the air pressure of the vehicle door along with the time change is formed. The pressure curve of the air pressure applied to the vehicle door over time can be represented in the form of a graph, in which the ordinate represents the difference between the air pressure and the ambient atmospheric pressure (in Pa) and the abscissa represents time (in ms).
It can be understood that the air pressure sensor can be installed at the center of mass of the vehicle door, the pressure value corresponding to the air pressure is determined by setting the preset action area, a plurality of air pressure sensors can be installed at different positions of the vehicle door for acquiring a plurality of air pressures corresponding to a certain moment, a plurality of pressure values corresponding to the air pressures are determined by setting the preset action area, and the air pressure value corresponding to the moment is obtained by averaging. In order to obtain more accurate air pressure values, grid area units are divided on the inner surface of the vehicle door, the inner surface of the vehicle door is divided into a plurality of area units, the area of each area unit is the same, and air pressure sensors are arranged on the inner surface of the vehicle door in an array mode, so that the air pressure of each area unit on the inner surface of the vehicle door in the closing process of the vehicle door and the change of the air pressure are collected and recorded, the air pressure sensors correspond to the area units one by one, the air pressure received by each area unit on the inner surface of the vehicle door at a certain moment is summarized, and the air pressure value received by the whole vehicle door at the moment is obtained.
Step S20: and converting a pressure curve of air pressure borne by the vehicle door along with the change of time into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door according to a preset conversion strategy.
It should be noted that, the preset conversion strategy may be to convert a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time, and then convert the moment curve of equivalent moment along with time into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door.
Specifically, the step S20 includes: converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time; acquiring the angular speed of the rotation of the vehicle door around the hinge axis; and converting the moment curve of the equivalent moment changing along with time into the moment curve of the equivalent moment changing along with the closing angle of the vehicle door according to the angular speed.
Further, the converting the pressure curve of the air pressure of the vehicle door with time to the moment curve of the equivalent moment with time includes: the pressure borne by the vehicle door is equivalent to the mass center of the vehicle door, and the distance between the mass center of the vehicle door and the axis of the hinge is obtained; and converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time according to the distance.
It will be appreciated that the process of converting the pressure profile of the air pressure applied to the door over time into the moment profile of the equivalent moment over time may include converting the pressure applied to the door at each moment into the equivalent moment, in a specific implementation, converting the equivalent effect of the air resistance applied to the whole door in the cabin of the vehicle to the centroid point of the door, that is, assuming that the pressure value collected by the air pressure sensor acts on the centroid point of the door, determining the equivalent moment corresponding to a certain pressure value according to the distance between the centroid of the door and the hinge axis, thereby converting the pressure profile of the air pressure applied to the door over time into the moment profile of the equivalent moment over time. Converting the pressure value born by the vehicle door into equivalent moment through a formula (1):
N Total (S) ＝F Total (S) * L formula (1)
Wherein N is Total (S) Is equivalent to moment F Total (S) The pressure value applied to the vehicle door is L, and the distance between the center of mass of the vehicle door and the axis of the hinge is L.
In a specific implementation, the moment curve of the equivalent moment over time may be represented in the form of a graph, in which the ordinate is the equivalent moment (in N/m) and the abscissa is the time (in ms).
It should be noted that, the process of converting the moment curve of the equivalent moment changing with time into the moment curve of the equivalent moment changing with the closing angle of the door may include converting each moment into the closing angle of the door, in a specific implementation, the closing speed of the door is approximately considered to be constant, in the closing process of the door, a door closing device may be provided, the door closing device may be kept at a constant speed when closing the door, and in the case that the closing speed is constant, the angular speed of the door rotating around the hinge axis is constant, that is, the closing angle (in radian) of the door may be determined according to the door speed and time, so that the moment curve of the equivalent moment changing with time is converted into the moment curve of the equivalent moment changing with the closing angle of the door. The moment curve of the equivalent moment along with the change of the door closing angle can be represented in the form of a graph, wherein the ordinate of the graph is the equivalent moment (in N/m) and the abscissa is the door closing angle (in degrees). In order to facilitate the processing of graphics, the door closing angle can be enlarged 1000 times during the graph construction process.
In the specific implementation, the constant angular velocity kept by the door closing device is stored in a preset storage area, and when curve conversion is carried out, the door closing air resistance energy obtaining equipment obtains the angular velocity of the door rotating around the hinge axis from the preset storage area, and the door closing angle is obtained by multiplying the time by the angular velocity, so that a moment curve of the equivalent moment changing along with time is converted into a moment curve of the equivalent moment changing along with the door closing angle according to the angular velocity.
Step S30: and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area.
In specific implementation, a moment curve of the equivalent moment changing along with the closing angle of the vehicle door can be imported into design software, a target area is defined according to the curve, the axis of abscissa and ordinate and a target boundary line, the area corresponding to the target area is calculated, and the equivalent area is obtained, and the area of the target area is the energy consumed by the air pressure on the inner surface of the vehicle door in the whole closing process of the vehicle door. The target boundary line represents the closing angle of the whole vehicle door closing process, namely the moment curve end point of the target boundary line, which changes along with the vehicle door closing angle through the equivalent moment, is parallel to the ordinate.
Referring to fig. 4, fig. 4 is a schematic diagram of an equivalent area of an embodiment of a method for acquiring air resistance energy when a vehicle door is closed, a moment curve of an equivalent moment changing with a closing angle of the vehicle door is imported into design software, and a coordinate system is established proportionally, so that a coordinate scale (an abscissa axis 6 represents a vehicle door angle x 1000, an ordinate axis 7 represents an equivalent moment generated by an air pressure in a cabin to the vehicle door) in the coordinate system is consistent with a scale (an abscissa axis represents a vehicle door angle, an ordinate axis represents an equivalent moment generated by the air pressure in the cabin to the vehicle door) of the moment curve of the equivalent moment changing with the closing angle of the vehicle door. In the coordinate system, a spline curve 5 is used for fitting a moment curve of equivalent moment changing along with the closing angle of the vehicle door, and a vertical line 8 (target boundary line 8) is used for representing the closing angle of the whole vehicle door closing process. According to the curve 5, the abscissa axis 6, the ordinate axis 7 and the target boundary line 8, an area of the area, which is 1000 times of the energy consumed by the air resistance of the inner surface of the door in the whole door closing process (the door closing angle is enlarged 1000 times in the coordinate system), can be directly measured in design software, and the energy consumed by the air resistance of the inner surface of the door in the whole door closing process can be obtained by dividing the area of the area by 1000.
After the step S30, the method further includes: acquiring a preset energy range and a preset pressure range from a preset storage area; judging whether the air resistance energy belongs to the preset energy range or not; judging whether the pressure born by the vehicle door belongs to the preset pressure range according to a pressure curve of the air pressure born by the vehicle door, which changes along with time; and when the air resistance energy belongs to the preset energy range and the pressure born by the vehicle door belongs to the preset pressure range, judging that the current design parameters of the vehicle door are qualified.
It should be understood that the preset storage area may be a memory that is set in advance and connected to the door closing air resistance energy obtaining device, or may be other storage units, where a preset energy range and a preset pressure range are stored in advance, where the preset energy range and the preset pressure range are determined according to design requirements or related standards, and where a determination program may be stored in the memory, where the door closing air resistance energy obtaining device processes a pressure curve of air pressure applied to the door and a moment curve of equivalent moment that varies with a door closing angle, determines air resistance energy and an air pressure value that varies with time, invokes a determination program in the memory, determines whether the air resistance energy belongs to the preset energy range, determines whether the air pressure value that varies with time belongs to the preset pressure range, and if both conditions are satisfied, that is, the air resistance energy belongs to the preset energy range, and if the air pressure value that varies with time belongs to the preset pressure range, determines that the current design parameters of the door are qualified.
After judging whether the pressure born by the vehicle door belongs to the preset pressure range according to the pressure curve of the air pressure born by the vehicle door, which changes along with time, the method further comprises: and when the air resistance energy does not belong to the preset energy range or the pressure born by the vehicle door does not belong to the preset pressure range, adjusting the related design parameters of the vehicle door.
It should be noted that if the condition is not satisfied, that is, the air resistance energy does not belong to the preset energy range, or the air pressure value changing with time does not belong to the preset pressure range, the current design parameters of the vehicle door are determined to be unqualified, the relevant design parameters of the vehicle door are required to be adjusted or the design is required to be modified, and the air pressure change and the consumed energy in the closed vehicle of the vehicle door are ensured to satisfy the design target.
It will be appreciated that the relevant design parameters may include: cabin volume, door area, whole car gas tightness, exhaust flow of the pressure relief valve, path of cabin air and door closing speed. In the concrete implementation, the relevant parameters are regulated by considering the development design stage, and in the early stage of vehicle model design and development, reasonable door closing air resistance energy and cabin air pressure can be obtained by reasonably selecting the combination of parameters of cabin inner volume, vehicle door area, whole vehicle air tightness, exhaust flow of a pressure release valve, cabin air path and vehicle door closing speed; in the later period of vehicle development, several parameters except the exhaust flow of the pressure relief valve can not be regulated, so that reasonable door closing air resistance energy and cabin air pressure can be obtained by regulating the exhaust flow of the pressure relief valve in the later period of vehicle development. In general, increasing the opening area of the vehicle body pressure relief valve can reduce the pressure variation range in the closed vehicle in the vehicle door and consume energy; reducing the opening area of the pressure relief valve of the vehicle body can promote the pressure fluctuation range in the closed vehicle in the vehicle door and consume energy.
In the embodiment, a pressure curve of air pressure variation of the vehicle door along with time is obtained in the closing process of the vehicle door; converting a pressure curve of air pressure borne by the vehicle door along with time change into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door according to a preset conversion strategy; and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area. By the method, the pressure curve of the air pressure on the inner surface of the vehicle door, which changes along with time, is obtained, the moment curve of the equivalent moment, which changes along with the closing angle of the vehicle door, is converted, the equivalent area under the curve is determined according to the curve and the boundary, and the energy consumed by the air resistance in the vehicle cabin when the vehicle door is closed acting on the inner surface of the vehicle door is obtained, so that the problems that the factors such as the volume in the vehicle cabin, the area of the vehicle door, the exhaust flow of the vehicle body pressure relief valve, the air tightness of the vehicle body and the like cannot be obtained or the influence on the energy consumed by determining the air resistance in the vehicle cabin in the closing process of the vehicle door is not determined are effectively avoided, and the problem that the energy consumed by the air resistance in the vehicle door closing cabin is difficult to accurately obtained in the prior art is solved. The energy consumed by the air resistance in the cabin in the closing process of the vehicle door can provide reliable basis for researching, designing and developing the closing energy of the vehicle door, and provide favorable reference data for improving the closing performance of the vehicle door.
Referring to fig. 5, fig. 5 is a flowchart illustrating a second embodiment of a method for acquiring air resistance energy for closing a vehicle door according to the present invention.
Based on the above-described first embodiment, the step S10 of the vehicle door closing air resistance energy obtaining method of the present embodiment includes:
step S101: and in the process of closing the vehicle door, acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time.
It can be understood that according to the flow characteristics of air in the vehicle cabin, the air pressure in the whole vehicle cabin is distributed in a three-dimensional space field at a certain moment in the closing process of the vehicle door, namely, the air pressure in the vehicle cabin changes along with the different spatial positions in the vehicle cabin; the air pressure at each position corresponds to the air pressure field in the cabin and is distributed according to the curved surface field, namely the air pressure at each position of the inner surface of the vehicle door is different.
In a specific implementation, a plurality of air pressure sensors can be installed at different positions of the vehicle door and used for acquiring a plurality of air pressures corresponding to a certain moment, and a plurality of pressure values corresponding to the air pressures are determined by setting a preset acting area, so that a pressure curve of the pressure of a plurality of areas along with the change of time is obtained.
The step S101 includes: and in the process of closing the vehicle door, acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time according to a plurality of air pressure sensors arranged on the inner surface of the vehicle door, wherein the plurality of air pressure sensors are arranged in an array type in a grid area of the inner surface of the vehicle door.
Referring to fig. 6, fig. 6 is a schematic diagram showing a layout of a door sensor according to an embodiment of the method for acquiring air resistance energy for closing a door of the present invention, wherein the door inner surface is divided into a plurality of grid area units 11 by using a longitudinal line 9 and a transverse line 10, and the air pressure of the grid area units 11 is approximately considered to be the same assuming that the area of the grid area units 11 is a. Air pressure sensors are installed in the grid area units 11, namely, the air pressure sensors are arranged in the grid areas on the inner surface of the vehicle door in an array mode, the air pressure sensors are used for measuring the air pressure P of the grid area units 11, the pressure curves corresponding to the areas and changing along with time are obtained through measurement, and the pressure curves corresponding to the areas and changing along with time are converted into pressure curves corresponding to the areas and changing along with time according to the area A. Specifically, the pressure is converted into the pressure through a formula (2):
F=a×p formula (2)
Wherein A is the area, P is the air pressure, and F is the pressure value to which a certain area is subjected.
Step S102: and summarizing pressure curves of air pressure of a plurality of areas of the vehicle door, which change along with time, so as to obtain the pressure curves of the air pressure of the vehicle door, which change along with time.
It can be understood that the process of summarizing the pressure curves of the air pressure of the plurality of areas of the vehicle door with time change may include averaging the pressure values of the plurality of areas corresponding to each time to obtain the pressure values corresponding to each time, and according to the time and the pressure values corresponding to each time, obtaining the pressure curve of the air pressure of the vehicle door with time change.
According to the method, the pressure curves of the air pressure of the plurality of areas of the vehicle door, which change along with time, are obtained through the air pressure sensors in the closing process of the vehicle door, the pressure curves of the air pressure of the plurality of areas of the vehicle door, which change along with time, are summarized, the pressure curves of the air pressure of the vehicle door, which change along with time, are obtained, the air pressure sensors are arranged in the grid areas of the inner surface of the vehicle door in an array mode, the fact that the air pressure of the vehicle cabin corresponding to different space positions of the inner surface of the vehicle door is different is considered, more accurate pressure curve data which change along with time are provided for obtaining air resistance energy, and the technical problem that the energy consumed by the air resistance of the vehicle door closing cabin is difficult to accurately obtained in the prior art is solved. The energy consumed by the air resistance in the cabin in the closing process of the vehicle door can provide reliable basis for researching, designing and developing the closing energy of the vehicle door, and provide favorable reference data for improving the closing performance of the vehicle door.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a vehicle door closing air resistance energy acquisition program, and the vehicle door closing air resistance energy acquisition program realizes the steps of the vehicle door closing air resistance energy acquisition method when being executed by a processor.
Referring to fig. 7, fig. 7 is a block diagram showing the structure of a first embodiment of a door closing air resistance energy obtaining apparatus of the present invention.
As shown in fig. 7, the vehicle door closing air resistance energy obtaining device according to the embodiment of the present invention includes:
the acquisition module 10 is used for acquiring a pressure curve of air pressure applied to the vehicle door along with time change during the closing process of the vehicle door.
The conversion module 20 is configured to convert a pressure curve of air pressure applied to the vehicle door over time into a moment curve of equivalent moment over time according to a preset conversion strategy.
The calculating module 30 is configured to calculate an equivalent area according to a moment curve and a boundary of the equivalent moment changing with the closing angle of the vehicle door, and determine air resistance energy according to the equivalent area.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.
In the embodiment, a pressure curve of air pressure variation of the vehicle door along with time is obtained in the closing process of the vehicle door; converting a pressure curve of air pressure borne by the vehicle door along with time change into a moment curve of equivalent moment along with the change of the closing angle of the vehicle door according to a preset conversion strategy; and calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and the boundary, and determining air resistance energy according to the equivalent area. By the method, the pressure curve of the air pressure on the inner surface of the vehicle door, which changes along with time, is obtained, the moment curve of the equivalent moment, which changes along with the closing angle of the vehicle door, is converted, the equivalent area under the curve is determined according to the curve and the boundary, and the energy consumed by the air resistance in the vehicle cabin when the vehicle door is closed acting on the inner surface of the vehicle door is obtained, so that the problems that the factors such as the volume in the vehicle cabin, the area of the vehicle door, the exhaust flow of the vehicle body pressure relief valve, the air tightness of the vehicle body and the like cannot be obtained or the influence on the energy consumed by determining the air resistance in the vehicle cabin in the closing process of the vehicle door is not determined are effectively avoided, and the problem that the energy consumed by the air resistance in the vehicle door closing cabin is difficult to accurately obtained in the prior art is solved. The energy consumed by the air resistance in the cabin in the closing process of the vehicle door can provide reliable basis for researching, designing and developing the closing energy of the vehicle door, and provide favorable reference data for improving the closing performance of the vehicle door.
In an embodiment, the conversion module 20 is further configured to:
converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time;
acquiring the angular speed of the rotation of the vehicle door around the hinge axis;
and converting the moment curve of the equivalent moment changing along with time into the moment curve of the equivalent moment changing along with the closing angle of the vehicle door according to the angular speed.
In an embodiment, the conversion module 20 is further configured to:
the pressure borne by the vehicle door is equivalent to the mass center of the vehicle door, and the distance between the mass center of the vehicle door and the axis of the hinge is obtained;
and converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time according to the distance.
In an embodiment, the obtaining module 10 is further configured to:
acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time in the closing process of the vehicle door;
and summarizing pressure curves of air pressure of a plurality of areas of the vehicle door, which change along with time, so as to obtain the pressure curves of the air pressure of the vehicle door, which change along with time.
In an embodiment, the obtaining module 10 is further configured to:
And in the process of closing the vehicle door, acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time according to a plurality of air pressure sensors arranged on the inner surface of the vehicle door, wherein the plurality of air pressure sensors are arranged in an array type in a grid area of the inner surface of the vehicle door.
In an embodiment, the vehicle door closing air resistance energy obtaining device further includes: designing a module; the design module is used for:
acquiring a preset energy range and a preset pressure range from a preset storage area;
judging whether the air resistance energy belongs to the preset energy range or not;
judging whether the pressure born by the vehicle door belongs to the preset pressure range according to a pressure curve of the air pressure born by the vehicle door, which changes along with time;
and when the air resistance energy belongs to the preset energy range and the pressure born by the vehicle door belongs to the preset pressure range, judging that the current design parameters of the vehicle door are qualified.
In an embodiment, the design module is further configured to:
and when the air resistance energy does not belong to the preset energy range or the pressure born by the vehicle door does not belong to the preset pressure range, adjusting the related design parameters of the vehicle door.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the method for acquiring air resistance energy for closing a vehicle door provided in any embodiment of the present invention, which is not described herein.
Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (8)
1. A vehicle door closing air resistance energy obtaining method, characterized by comprising:
acquiring a pressure curve of air pressure variation of the vehicle door along with time in the closing process of the vehicle door;
converting a pressure curve of air pressure borne by the vehicle door, which changes along with time, into a moment curve of equivalent moment, which changes along with the closing angle of the vehicle door, according to a preset conversion strategy;
calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and a boundary, and determining air resistance energy according to the equivalent area;
the converting, according to a preset conversion strategy, a pressure curve of air pressure applied to the vehicle door, which varies with time, into a moment curve of equivalent moment, which varies with a closing angle of the vehicle door, includes:
converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time;
acquiring the angular speed of the rotation of the vehicle door around the hinge axis;
converting the moment curve of the equivalent moment changing along with time into the moment curve of the equivalent moment changing along with the closing angle of the vehicle door according to the angular speed;
the method for converting the pressure curve of the air pressure of the vehicle door with time into the moment curve of the equivalent moment with time comprises the following steps:
The pressure borne by the vehicle door is equivalent to the mass center of the vehicle door, and the distance between the mass center of the vehicle door and the axis of the hinge is obtained;
and converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time according to the distance.
2. The method for acquiring air resistance energy for closing a vehicle door according to claim 1, wherein the step of acquiring a pressure curve of air pressure applied to the vehicle door with time during the closing of the vehicle door comprises:
acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time in the closing process of the vehicle door;
and summarizing pressure curves of air pressure of a plurality of areas of the vehicle door, which change along with time, so as to obtain the pressure curves of the air pressure of the vehicle door, which change along with time.
3. The method for acquiring air resistance energy for closing a vehicle door according to claim 2, wherein the step of acquiring a pressure curve of air pressure applied to a plurality of regions of the vehicle door with time during the closing of the vehicle door comprises:
and in the process of closing the vehicle door, acquiring a pressure curve of air pressure variation of a plurality of areas of the vehicle door along with time according to a plurality of air pressure sensors arranged on the inner surface of the vehicle door, wherein the plurality of air pressure sensors are arranged in an array type in a grid area of the inner surface of the vehicle door.
4. The vehicle door closing air resistance energy obtaining method according to any one of claims 1 to 3, wherein the calculating an equivalent area from a moment curve and a boundary of the equivalent moment varying with a vehicle door closing angle, after determining air resistance energy from the equivalent area, further comprises:
acquiring a preset energy range and a preset pressure range from a preset storage area;
judging whether the air resistance energy belongs to the preset energy range or not;
judging whether the pressure born by the vehicle door belongs to the preset pressure range according to a pressure curve of the air pressure born by the vehicle door, which changes along with time;
and when the air resistance energy belongs to the preset energy range and the pressure born by the vehicle door belongs to the preset pressure range, judging that the current design parameters of the vehicle door are qualified.
5. The method for acquiring air resistance energy for closing a vehicle door according to claim 4, wherein after determining whether the pressure applied to the vehicle door falls within the preset pressure range according to the pressure curve of the air pressure applied to the vehicle door over time, the method further comprises:
and when the air resistance energy does not belong to the preset energy range or the pressure born by the vehicle door does not belong to the preset pressure range, adjusting the related design parameters of the vehicle door.
6. A door closing air resistance energy obtaining device, characterized by comprising:
the acquisition module is used for acquiring a pressure curve of air pressure variation of the vehicle door along with time in the closing process of the vehicle door;
the conversion module is used for converting a pressure curve of air pressure born by the vehicle door, which changes along with time, into a moment curve of equivalent moment, which changes along with the closing angle of the vehicle door, according to a preset conversion strategy;
the calculation module is used for calculating an equivalent area according to a moment curve of the equivalent moment changing along with the closing angle of the vehicle door and a boundary, and determining air resistance energy according to the equivalent area;
the conversion module is also used for converting a pressure curve of air pressure born by the vehicle door, which changes along with time, into a moment curve of equivalent moment, which changes along with time; acquiring the angular speed of the rotation of the vehicle door around the hinge axis; converting the moment curve of the equivalent moment changing along with time into the moment curve of the equivalent moment changing along with the closing angle of the vehicle door according to the angular speed;
the conversion module is also used for equivalently acting the pressure born by the vehicle door on the mass center of the vehicle door and acquiring the distance between the mass center of the vehicle door and the axis of the hinge; and converting a pressure curve of air pressure applied to the vehicle door along with time into a moment curve of equivalent moment along with time according to the distance.
7. A vehicle door closing air resistance energy acquisition apparatus, characterized by comprising: a memory, a processor, and a door closing air resistance energy harvesting program stored on the memory and operable on the processor, the door closing air resistance energy harvesting program configured to implement the door closing air resistance energy harvesting method of any one of claims 1-5.
8. A storage medium having stored thereon a door closing air resistance energy acquisition program which, when executed by a processor, implements the door closing air resistance energy acquisition method according to any one of claims 1 to 5.
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