A vehicle bench driving cycle display method and system based on a Qt framework

Abstract

The application provides a whole vehicle bench driving cycle display method and system based on a Qt framework, and relates to the technical field of bench tests.The method comprises the following steps: obtaining an output signal of a drum device when a target vehicle is tested on the drum device; determining a real-time vehicle speed of the target vehicle according to the output signal; simulating the real-time vehicle speed to preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the actual vehicle speed; updating X-axis coordinates in the chart according to the same drawing frequency, and drawing a driving cycle curve according to a vehicle speed curve; and controlling the driving cycle curve to be displayed on a preset display device.The application provides an open loading software, breaks the restriction of the supplier on the bundled use of software and hardware, and enables the software to be independently used in various places and simply and conveniently loaded and run.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bench test, in particular to a vehicle bench driving cycle display method and system based on Qt framework. BACKGROUND

[0002] When a vehicle is tested on a vehicle bench in a test room to simulate actual road conditions, a device for displaying driving cycle curves is needed to guide the driver.

[0003] When a test room simulates actual road conditions and displays driving cycle curves, the common method is as follows: a set of drum equipment is used to simulate the road, and then a set of driver aid is provided, and a set of loading software is installed on a control computer to connect the drum equipment and the driver aid, and the driver aid displays the theoretical driving cycle curve and the actual driving curve, thereby guiding the test personnel to test and drive, and specific operation steps are needed to prepare the software for program loading before the test starts.

[0004] However, the existing driving cycle curve loading software is installed on a desktop computer provided by a supplier, and is used in combination with the driver aid, the drum and other control computers, and is highly integrated with the related equipment, and no matter what type of test is performed, the loading can only be performed in the page set by the supplier according to specific steps, the steps are complicated and time-consuming, and the loading can only be performed in a fixed bench or place, which is relatively passive and cannot meet the actual demands of customers in various scenarios. SUMMARY

[0005] Therefore, the present application aims to provide a vehicle bench driving cycle display method and system based on Qt framework, so as to provide an open loading software, break the restriction of the supplier on the combination of the software and the hardware, and enable the software to be independently used in various places and loaded and run simply and conveniently.

[0006] The first aspect of the present application provides a vehicle bench driving cycle display method based on Qt framework, which comprises the following steps:

[0007] When a target vehicle is tested on a bench by drum equipment, an output signal of the drum equipment is acquired;

[0008] According to the output signal, a real-time vehicle speed of the target vehicle is determined;

[0009] According to the real-time vehicle speed, the real-time vehicle speed is simulated into a preset drawing software of a mobile terminal, so as to realize real-time display and chart drawing of the actual vehicle speed;

[0010] The X-axis coordinate in the chart is updated at the same drawing frequency to obtain the moving effect of the vehicle speed curve, and a driving cycle curve is drawn according to the vehicle speed curve;

[0011] The driving cycle curve is displayed on a preset display device, so that the test personnel can obtain the driving cycle information of the target vehicle during the bench test through the display device.

[0012] According to an aspect of the above technical solution, when a target vehicle is tested on a drum device, the output signal of the drum device is obtained by a preset signal acquisition card.

[0013] When a target vehicle is tested on a drum device, the output signal of the drum device is obtained by a preset signal acquisition card.

[0014] According to an aspect of the above technical solution, according to the output signal, the real-time vehicle speed of the target vehicle is determined, specifically including:

[0015] According to the output signal, the dynamic characteristics of the output signal at several time nodes are determined.

[0016] According to the dynamic characteristics of the output signal at several time nodes, the real-time vehicle speed of the target vehicle at the several time nodes is determined.

[0017] According to an aspect of the above technical solution, according to the real-time vehicle speed, the real-time vehicle speed is simulated into a preset drawing software of a mobile terminal, to realize real-time display and chart drawing of the actual vehicle speed, specifically including:

[0018] According to the real-time vehicle speed, the real-time vehicle speed is simulated into a drawing subroutine of a preset drawing software of a mobile terminal according to a preset drawing frequency;

[0019] The actual vehicle speed is displayed in the drawing subroutine of the drawing software, and chart drawing is performed according to the actual vehicle speed;

[0020] The mobile terminal is a portable notebook computer, and the drawing software preset in the mobile terminal is QChart software.

[0021] According to an aspect of the above technical solution, the X-axis coordinates in the chart are updated according to the same drawing frequency to obtain the moving effect of the vehicle speed curve, and the driving cycle curve is drawn according to the vehicle speed curve, specifically including:

[0022] According to the drawing frequency during chart drawing, the blank interface of chart drawing is loaded according to the same drawing frequency;

[0023] According to the loaded blank interface, the X-axis coordinates in the chart are updated to obtain the moving effect of the vehicle speed curve during chart drawing;

[0024] According to the vehicle body curve, the driving cycle curve is correspondingly drawn in the drawing program at the same drawing frequency.

[0025] According to an aspect of the above technical solution, the driving cycle curve is displayed on a preset display device, so that the tester obtains the driving cycle information of the target vehicle in the bench test process through the display device, and the step specifically includes:

[0026] A data display instruction is sent to a preset display device.

[0027] The display device is controlled to display the driving cycle curve in real time, so that the tester obtains the driving cycle information of the target vehicle in the bench test process through the display device.

[0028] According to an aspect of the above technical solution, the method further includes:

[0029] At least one vehicle performance feature in the vehicle speed curve and the driving cycle curve is marked to obtain the vehicle performance data.

[0030] The vehicle performance data is stored in a preset storage server in an encrypted manner.

[0031] When the next bench test of the target vehicle is needed, the vehicle performance data is called from the storage server and decrypted.

[0032] The target vehicle is tested for a preset number of times with reference to the vehicle performance features.

[0033] According to an aspect of the above technical solution, the vehicle performance data is stored in a preset storage server in an encrypted manner, and the step specifically includes:

[0034] The vehicle performance data is segmented to obtain a plurality of vehicle performance sub-data, and the segmented vehicle performance sub-data is distributed and stored in different server nodes.

[0035] The second aspect of the application provides a whole vehicle bench driving cycle display system based on a Qt framework, and the system includes:

[0036] A data acquisition module is configured to acquire output signals of a drum device when the target vehicle is tested on the drum device.

[0037] A vehicle speed calculation module is configured to determine the real-time vehicle speed of the target vehicle according to the output signals.

[0038] The first chart drawing module is configured to simulate the real-time vehicle speed into preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the actual vehicle speed.

[0039] The second chart drawing module is configured to update the X-axis coordinate in the chart according to the same drawing frequency, so as to obtain a moving effect of a vehicle speed curve, and draw a driving cycle curve according to the vehicle speed curve.

[0040] The information display module is configured to control the driving cycle curve to be displayed on a preset display device, so that a test personnel can obtain driving cycle information of the target vehicle in a bench test process through the display device.

[0041] According to an aspect of the above technical solution, the vehicle speed calculation module is specifically configured to:

[0042] According to the output signal, the dynamic characteristics of the output signal at a plurality of time nodes are determined.

[0043] According to the dynamic characteristics of the output signal at a plurality of time nodes, the real-time vehicle speed of the target vehicle at the plurality of time nodes is determined.

[0044] Compared with the prior art, the vehicle bench driving cycle display method and system based on the Qt framework have the following beneficial effects:

[0045] When a target vehicle is tested on a drum device, the real-time vehicle speed of the target vehicle can be determined according to an output signal of the drum device, so that a vehicle speed curve can be drawn on preset drawing software of a mobile terminal according to the real-time vehicle speed of the target vehicle, a driving cycle curve can be drawn according to the vehicle speed curve, and the driving cycle curve can be displayed on a preset display device, so that a test personnel can obtain driving cycle information. The present embodiment can be applied to different drum devices through a mobile terminal, and driving cycle information can be displayed by drawing a driving cycle curve. The present embodiment is no longer limited to the use of a drum device, a special test device and test software, and has higher universality. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 FIG. 1 is a flowchart of a vehicle bench driving cycle display method based on a Qt framework in a first embodiment of the present application;

[0047] Figure 2 FIG. 3 is a structural block diagram of a vehicle bench driving cycle display system based on a Qt framework in a third embodiment of the present application;

[0048] The following specific embodiments will further illustrate the present application in combination with the above drawings. DETAILED DESCRIPTION

[0049] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0050] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] Example 1

[0053] See also Figure 1 , which is a flow chart of a vehicle test bench driving cycle display method based on the Qt framework provided by the first embodiment of the present invention, the method includes steps S10-S50:

[0054] Step S10 : When a target vehicle is subjected to a bench test by a rotating drum device, an output signal of the rotating drum device is obtained.

[0055] Specifically, during the bench test of the target vehicle using the drum equipment, the tester operates the drive wheel of the target vehicle to rotate, and the drive wheel drives the drum of the drum equipment to rotate. In this way, when the drive wheel drives the drum to rotate, the real-time speed of the drum can be obtained through the speed sensor of the drum equipment, so that the real-time speed of the drum can be output as an output signal.

[0056] Step S20: determining the real-time speed of the target vehicle according to the output signal.

[0057] Specifically, after obtaining the output signal of the drum device, the real-time rotation speed of the drum can be used to calculate the real-time rotation speed of the drive wheel of the target vehicle and the corresponding real-time vehicle speed according to the calculation formula, thereby obtaining the real-time vehicle speed of the target vehicle.

[0058] Step S30, according to the real-time vehicle speed, the real-time vehicle speed is simulated into a preset drawing software of a mobile terminal to realize real-time display and chart drawing of the actual vehicle speed.

[0059] In this embodiment, after obtaining the real-time rotating speed of the target vehicle, the chart drawing of the actual vehicle speed can be performed according to the real-time rotating speed of the target vehicle.

[0060] Specifically, by simulating the real-time vehicle speed of the target vehicle into a preset drawing program of a mobile terminal, the real-time vehicle speed of the target vehicle can be displayed and charted accordingly.

[0061] The mobile terminal is, for example, a notebook computer which is convenient to carry and transfer, and the preset drawing program in the notebook computer is QChart software which can chart the real-time vehicle speed according to the real-time vehicle speed of the target vehicle.

[0062] It should be noted that using the mobile terminal with QChart software for chart drawing can make the mobile terminal applicable to different drum devices, which only needs to establish a communication connection between the mobile terminal and the drum device, for example, connecting the mobile terminal and the drum device by a signal line, so that the output signal of the drum device can be obtained through the QChart software of the mobile terminal, and then the chart drawing can be performed after determining the real-time vehicle speed of the target vehicle according to the output signal. In this way, one mobile device can be applicable to different drum devices, and is no longer limited to being used with special test equipment and test software.

[0063] Step S40, updating the X-axis coordinate in the chart according to the same drawing frequency to obtain the moving effect of the vehicle speed curve, and drawing the driving cycle curve according to the vehicle speed curve;

[0064] It should be noted that when the target vehicle is tested by the drum device, the test time is long and the characteristics are more, in order to clearly express the characteristics of the chart, the X-axis coordinate of the chart needs to be updated according to the drawing frequency, that is, the X-axis of the chart is extended, that is, the time axis is extended. When the test personnel need to analyze the vehicle speed curve, the control slider of the X-axis can be dragged to obtain the moving effect of the vehicle speed curve.

[0065] During the bench test, as the test time is prolonged, the vehicle speed curve is gradually drawn along with the extension of the X-axis; at the same time, the driving cycle curve is drawn according to the vehicle speed curve, and similarly, the X-axis (time axis) of the driving cycle curve is gradually extended during the drawing process.

[0066] Step S50, control the driving cycle curve is displayed on a preset display device, so that the test personnel obtain the driving cycle information of the target vehicle in the process of the bench test through the display device.

[0067] Wherein, after the driving cycle curve is drawn, a data display instruction is sent to a preset display device, then the display device can display the driving cycle curve after receiving the instruction, so that the test personnel can obtain the driving cycle information of the target vehicle in the process of the bench test through the display device.

[0068] It should be noted that the display device for displaying the driving cycle curve includes but is not limited to a notebook computer and a dedicated content display device, such as a liquid crystal display, that is, the "driver assistant" in the prior art.

[0069] Compared with the prior art, the vehicle bench driving cycle display method based on the Qt framework shown in the embodiment has the beneficial effects that:

[0070] In the process of bench testing the target vehicle through the drum device, the output signal of the drum device is obtained, the real-time vehicle speed of the target vehicle is determined according to the output signal, the vehicle speed curve is drawn through the preset drawing software on the mobile terminal according to the real-time vehicle speed of the target vehicle, the driving cycle curve is drawn according to the vehicle speed curve, and the driving cycle curve is displayed through a preset display device, so that the test personnel can obtain the driving cycle information. The embodiment can be applied to different drum devices through a mobile terminal, and the driving cycle information can be displayed by drawing the driving cycle curve, which is no longer limited to the use of the drum device, the special test equipment and the test software in the prior art, and has higher universality.

[0071] Embodiment two

[0072] The second embodiment of the application provides a vehicle bench driving cycle display method based on the Qt framework. The vehicle bench driving cycle display method based on the Qt framework shown in the embodiment is different from the vehicle bench driving cycle display method based on the Qt framework shown in the first embodiment in that:

[0073] In the embodiment, in the process of bench testing the target vehicle through the drum device, the output signal of the drum device is obtained in the step of:

[0074] In the process of bench testing the target vehicle through the drum device, the output signal of the drum device is obtained through a preset signal acquisition card.

[0075] In the embodiment, the step of determining the real-time vehicle speed of the target vehicle according to the output signal specifically includes:

[0076] determining dynamic characteristics of the output signal at a plurality of time nodes according to the output signal;

[0077] determining real-time vehicle speeds of the target vehicle at the plurality of time nodes according to the dynamic characteristics of the output signal at the plurality of time nodes.

[0078] In the embodiment, according to the real-time vehicle speeds, the real-time vehicle speeds are simulated into a preset drawing software of a mobile terminal to realize the steps of real-time display and chart drawing of the actual vehicle speeds, which specifically include:

[0079] According to the real-time vehicle speeds, the real-time vehicle speeds are simulated into a drawing subroutine of a preset drawing software of a mobile terminal according to a preset drawing frequency;

[0080] The actual vehicle speeds are controlled to be displayed in the drawing subroutine of the drawing software, and charts are drawn according to the actual vehicle speeds;

[0081] The mobile terminal is a portable notebook computer, and the drawing software preset in the mobile terminal is QChart software.

[0082] In the embodiment, the X-axis coordinates in the charts are updated according to the same drawing frequency to obtain a moving effect of a vehicle speed curve, and the steps of drawing a driving cycle curve according to the vehicle speed curve specifically include:

[0083] According to the drawing frequency during chart drawing, a blank interface for chart drawing is loaded according to the same drawing frequency;

[0084] According to the loaded blank interface, the X-axis coordinates in the charts are updated to obtain a moving effect of a vehicle speed curve during chart drawing;

[0085] According to the vehicle speed curve, a driving cycle curve is drawn in the drawing program according to the same drawing frequency.

[0086] In the embodiment, the steps of controlling the driving cycle curve to be displayed on a preset display device so that a test personnel obtains driving cycle information of the target vehicle during a bench test through the display device specifically include:

[0087] A data display instruction is sent to a preset display device;

[0088] The display device is controlled to display the driving cycle curve in real time so that a test personnel obtains driving cycle information of the target vehicle during a bench test through the display device.

[0089] And, in the embodiment, the method further comprises:

[0090] annotating at least one vehicle performance feature in the vehicle speed curve and the driving cycle curve to obtain the vehicle performance data;

[0091] storing the vehicle performance data in a preset storage server in an encrypted manner;

[0092] decrypting the vehicle performance data from the storage server when the next bench test of the target vehicle is needed;

[0093] performing a preset number of bench tests on the target vehicle by referring to the vehicle performance features.

[0094] The step of storing the vehicle performance data in a preset storage server in an encrypted manner specifically comprises:

[0095] segmenting the vehicle performance data to obtain a plurality of vehicle performance sub-data, and distributing the segmented vehicle performance sub-data to different server nodes for storage.

[0096] Compared with the prior art, the vehicle bench driving cycle display method and system based on the Qt framework have the beneficial effects that:

[0097] When performing a bench test on a target vehicle through a drum device, the output signal of the drum device can be obtained to determine the real-time vehicle speed of the target vehicle according to the output signal, so that a speed curve can be drawn through a preset drawing software on a mobile terminal according to the real-time vehicle speed of the target vehicle, and a driving cycle curve can be drawn according to the speed curve, so that the driving cycle curve is displayed through a preset display device, which facilitates test personnel to obtain driving cycle information. The embodiment can be applied to different drum devices through a mobile terminal to display driving cycle information by drawing a driving cycle curve, and is no longer limited to the use of a drum device with a special test device and test software, and has better versatility.

[0098] Embodiment Three

[0099] Please refer to Figure 2 , which is a structure block diagram of a vehicle bench driving cycle display system based on the Qt framework provided by the third embodiment of the application, and the system comprises a data acquisition module 10, a vehicle speed calculation module 20, a first chart drawing module 30, a second chart drawing module 40, and an information display module 50.

[0100] The data acquisition module 10 is used to acquire the output signal of the drum device when performing a bench test on a target vehicle through a drum device.

[0101] Specifically, in the process of bench testing the target vehicle by the drum device, the tester operates the driving wheel of the target vehicle to rotate, and the driving wheel drives the drum of the drum device to rotate. Thus, the real-time rotational speed of the drum can be obtained by the rotational speed sensor of the drum device when the driving wheel drives the drum to rotate, and the real-time rotational speed of the drum is output as an output signal.

[0102] The vehicle speed calculation module 20 is configured to determine the real-time vehicle speed of the target vehicle according to the output signal.

[0103] Specifically, after obtaining the output signal of the drum device, the real-time rotational speed of the drum can be used to calculate the real-time rotational speed of the driving wheel of the target vehicle and the corresponding real-time vehicle speed according to a calculation formula, so as to obtain the real-time vehicle speed of the target vehicle.

[0104] The first chart drawing module 30 is configured to simulate the real-time vehicle speed to a preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the actual vehicle speed.

[0105] In this embodiment, after obtaining the real-time rotational speed of the target vehicle, the chart drawing of the actual vehicle speed can be performed according to the real-time rotational speed of the target vehicle.

[0106] Specifically, by simulating the real-time vehicle speed of the target vehicle to a preset drawing program of a mobile terminal, the real-time vehicle speed of the target vehicle can be displayed and charted accordingly.

[0107] The mobile terminal is, for example, a notebook computer which is convenient to carry and transfer, and the drawing program preset in the notebook computer is QChart software which can draw charts according to the real-time vehicle speed of the target vehicle.

[0108] It should be noted that using the mobile terminal with QChart software for chart drawing can make the mobile terminal applicable to different drum devices. It only needs to establish a communication connection between the mobile terminal and the drum device, for example, connecting the mobile terminal and the drum device by a signal line, so that the output signal of the drum device can be obtained by the QChart software of the mobile terminal. After determining the real-time vehicle speed of the target vehicle according to the output signal, chart drawing can be performed. Thus, one mobile device can be applicable to different drum devices, and is no longer limited to being used with special test equipment and test software.

[0109] The first chart drawing module 40 is used for updating the X-axis coordinate in the chart at the same drawing frequency to obtain the moving effect of the vehicle speed curve, and drawing the driving cycle curve according to the vehicle speed curve;

[0110] It should be noted that, when the target vehicle is tested by the drum device, the test time is long, and there are many characteristics. In order to clearly express the characteristics of the chart, the X-axis coordinate of the chart needs to be updated according to the drawing frequency, that is, the X-axis of the chart is extended, that is, the time axis is extended. When the test personnel need to analyze the vehicle speed curve, the control slider of the X-axis can be dragged to obtain the moving effect of the vehicle speed curve.

[0111] In the process of the bench test, as the test time is prolonged, the vehicle speed curve is gradually drawn along with the extension of the X-axis; at the same time, the driving cycle curve is drawn according to the vehicle speed curve, and the X-axis (time axis) of the driving cycle curve is also gradually extended in the drawing process.

[0112] The information display module 50 is used for controlling the driving cycle curve to be displayed on a preset display device, so that the test personnel can obtain the driving cycle information of the target vehicle in the process of the bench test through the display device.

[0113] After the driving cycle curve is drawn, a data display instruction is sent to a preset display device, so that the display device can display the driving cycle curve after receiving the instruction, so that the test personnel can obtain the driving cycle information of the target vehicle in the process of the bench test through the display device.

[0114] It should be noted that the display device used to display the driving cycle curve includes but is not limited to a notebook computer and a dedicated content display device, such as a liquid crystal display, that is, a "driver assistant" in the prior art.

[0115] In the embodiment, the vehicle speed calculation module 20 is specifically used for:

[0116] According to the output signal, the dynamic characteristics of the output signal at a plurality of time nodes are determined;

[0117] According to the dynamic characteristics of the output signal at a plurality of time nodes, the real-time vehicle speed of the target vehicle at the plurality of time nodes is determined.

[0118] Compared with the prior art, the whole vehicle bench driving cycle display system based on the Qt framework shown in the embodiment has the beneficial effects that:

[0119] In the bench test of the target vehicle through the drum equipment, the output signal of the drum equipment is acquired, the real-time vehicle speed of the target vehicle is determined according to the output signal, the vehicle speed curve is drawn through the preset drawing software on the mobile terminal according to the real-time vehicle speed of the target vehicle, the driving cycle curve is drawn according to the vehicle speed curve, and the driving cycle curve is displayed through the preset display equipment, so that the driving cycle information is obtained by the tester. The embodiment can be applied to different drum equipment through a mobile terminal, the driving cycle information is displayed through the driving cycle curve, and the generality is higher.

[0120] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0121] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A display method of a whole vehicle bench driving cycle based on a Qt framework, characterized in that, The method comprises: acquiring an output signal of a target vehicle during a bench test of the target vehicle by a drum test device; determining a real-time vehicle speed of the target vehicle according to the output signal; simulating the real-time vehicle speed into a preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the real-time vehicle speed; updating X-axis coordinates in the chart according to the same drawing frequency, so as to obtain a moving effect of a vehicle speed curve, and drawing a driving cycle curve according to the vehicle speed curve; controlling the driving cycle curve to be displayed on a preset display device, so that a tester can obtain driving cycle information of the target vehicle during the bench test through the display device.

2. The Qt framework-based vehicle bench driving cycle display method according to claim 1, characterized in that, In the step of acquiring an output signal of a target vehicle during a bench test of the target vehicle by a drum test device: acquiring the output signal of the target vehicle by a preset signal acquisition card during the bench test of the target vehicle by the drum test device.

3. The Qt framework-based vehicle bench driving cycle display method according to claim 1, characterized in that, The step of determining a real-time vehicle speed of the target vehicle according to the output signal specifically comprises: determining dynamic characteristics of the output signal at a plurality of time nodes according to the output signal; determining real-time vehicle speeds of the target vehicle at the plurality of time nodes according to the dynamic characteristics of the output signal at the plurality of time nodes.

4. The Qt framework-based vehicle bench driving cycle display method according to claim 1, characterized in that, The step of simulating the real-time vehicle speed into a preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the real-time vehicle speed specifically comprises: simulating the real-time vehicle speed into a drawing subroutine of a preset drawing software of a mobile terminal according to a preset drawing frequency according to the real-time vehicle speed; controlling the real-time vehicle speed to be displayed in the drawing subroutine of the drawing software, and drawing a chart according to the real-time vehicle speed; The mobile terminal is a portable notebook computer, and the drawing software preset in the mobile terminal is QChart software.

5. The Qt framework-based vehicle bench driving cycle display method according to claim 1, characterized in that, The step of updating X-axis coordinates in the chart according to the same drawing frequency, so as to obtain a moving effect of a vehicle speed curve, and drawing a driving cycle curve according to the vehicle speed curve specifically comprises: loading a blank interface of chart drawing according to a drawing frequency during chart drawing according to the same drawing frequency; updating X-axis coordinates in the chart according to the loaded blank interface, so as to obtain a moving effect of a vehicle speed curve during chart drawing; drawing a driving cycle curve according to the vehicle speed curve in a preset drawing software according to the same drawing frequency.

6. The Qt framework-based vehicle bench driving cycle display method according to claim 1, characterized in that, The step of controlling the driving cycle curve to be displayed on a preset display device, so that a tester can obtain driving cycle information of the target vehicle during the bench test through the display device specifically comprises: sending a data display instruction to a preset display device; controlling the display device to display the driving cycle curve in real time, so that a tester can obtain driving cycle information of the target vehicle during the bench test through the display device.

7. The Qt framework-based vehicle bench driving cycle display method according to any one of claims 1-6, characterized in that, The method further comprises: annotating at least one vehicle performance feature in the vehicle speed curve and the driving cycle curve to obtain vehicle performance data; storing the vehicle performance data in a preset storage server in an encrypted manner; decrypting the vehicle performance data from the storage server when a next bench test of the target vehicle is needed; performing a preset number of bench tests on the target vehicle with reference to the vehicle performance feature.

8. The Qt framework-based whole vehicle bench driving cycle display method according to claim 7, characterized in that, The step of storing the vehicle performance data in a preset storage server in an encrypted manner specifically comprises: segmenting the vehicle performance data to obtain a plurality of vehicle performance sub-data, and distributing and storing each segmented vehicle performance sub-data to different server nodes. 9.A Qt framework-based whole vehicle bench driving cycle display system, characterized in that, The system is applied to the method of any one of claims 1-8, and the system comprises: a data acquisition module configured to acquire an output signal of a drum test device when performing a bench test on a target vehicle by using the drum test device; a vehicle speed calculation module configured to determine a real-time vehicle speed of the target vehicle according to the output signal; a first chart drawing module configured to simulate the real-time vehicle speed to a preset drawing software of a mobile terminal according to the real-time vehicle speed, so as to realize real-time display and chart drawing of the real-time vehicle speed; a second chart drawing module configured to update X-axis coordinates in the chart at a same drawing frequency to obtain a moving effect of a vehicle speed curve, and to draw a driving cycle curve according to the vehicle speed curve; an information display module configured to control the driving cycle curve to be displayed on a preset display device, so that a tester can obtain driving cycle information of the target vehicle in the bench test process through the display device.

10. The Qt framework-based whole vehicle bench driving cycle display system according to claim 9, characterized in that, The vehicle speed calculation module is specifically configured to: determine dynamic features of the output signal at a plurality of time nodes according to the output signal; determine real-time vehicle speeds of the target vehicle at the plurality of time nodes according to the dynamic features of the output signal at the plurality of time nodes.

Images