Vehicle sliding resistance testing method, device, electronic equipment and storage medium

Abstract

The present invention discloses a vehicle sliding resistance test method, device, electronic device and storage medium. The method includes, when it is determined that the vehicle to be tested meets the sliding test conditions, adjusting the speed of the vehicle to be tested to a first preset speed and controlling it to start sliding, so that the speed of the vehicle to be tested is reduced to a second preset speed; according to the current sliding resistance coefficient of the vehicle to be tested in the current sliding process, determining the error result between the sliding resistance predicted by the current sliding resistance coefficient in the next sliding process and the actual sliding resistance; when the error result exceeds the preset error threshold, returning to execute the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start sliding, and determining the new current sliding resistance coefficient, until the error result does not exceed the preset error threshold, and ending the sliding process to realize the sliding resistance test of the vehicle to be tested. The technical scheme of the present invention ensures the accuracy of the test results and makes the test process simple and controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and in particular to a vehicle sliding resistance testing method, device, electronic equipment and storage medium. Background Art

[0002] The accuracy of the sliding resistance has a great impact on the power and economy of the whole vehicle. The current industry practice is to use the car sliding method of road test to obtain the car sliding distance, and then use this as the standard for the car sliding resistance. Although the road test method for determining the sliding distance is intuitive, simple and easy to test, the sliding test is affected by rolling resistance and wind resistance, which often leads to low controllability and sensitivity of the detection parameters, and poor repeatability. In addition, compared with the bench test, the gap between the whole vehicle road and the laboratory environment is obvious, and it is difficult to transplant it to the bench test. In order to improve the accuracy of the bench test for road simulation, how to simply, quickly and accurately match the sliding resistance of the automobile motor on the bench has become an urgent problem to be solved. Summary of the invention

[0003] The present invention provides a vehicle sliding resistance test method, device, electronic equipment and storage medium to ensure the accuracy of the test result and make the test process simple and controllable.

[0004] According to one aspect of the present invention, a vehicle sliding resistance test method is provided, the method comprising:

[0005] When it is determined that the vehicle to be tested meets the coasting test conditions, adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed;

[0006] Determining, according to the current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process, an error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance;

[0007] In the case that the error result exceeds the preset error threshold, the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start gliding is returned to, and a new current gliding resistance coefficient is determined until the error result does not exceed the preset error threshold, and the gliding process is ended to realize the gliding resistance test of the vehicle to be tested.

[0008] According to another aspect of the present invention, a vehicle sliding resistance testing device is provided, the device comprising:

[0009] A vehicle coasting control module, for adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed, when it is determined that the vehicle to be tested meets the coasting test conditions;

[0010] an error result determination module, used to determine the error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance according to the current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process;

[0011] The first coasting termination module is used to return to the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting when the error result exceeds a preset error threshold, and determine a new current coasting resistance coefficient until the error result does not exceed the preset error threshold, thereby terminating the coasting process to implement a coasting resistance test on the vehicle to be tested.

[0012] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0013] at least one processor; and

[0014] a memory communicatively connected to the at least one processor; wherein,

[0015] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the vehicle sliding resistance testing method described in any embodiment of the present invention.

[0016] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vehicle sliding resistance testing method described in any embodiment of the present invention when executed.

[0017] The technical solution of the embodiment of the present invention is as follows: when it is determined that the vehicle to be tested meets the coasting test conditions, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed; according to the current coasting resistance coefficient corresponding to the vehicle to be tested in the current coasting process, the error result between the predicted coasting resistance corresponding to the current coasting resistance coefficient in the next coasting process and the actual coasting resistance is determined; when the error result exceeds the preset error threshold, the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting is returned, and a new current coasting resistance coefficient is determined until the error result does not exceed the preset error threshold, and the coasting process is terminated to realize the coasting resistance test of the vehicle to be tested. The embodiment of the present invention adopts the technical means of iteratively testing the coasting resistance, which solves the problem that the existing road test has poor controllability and is difficult to transplant to the bench test, resulting in inaccurate coasting resistance test results, ensures the accuracy of the test results and makes the test process simple and controllable.

[0018] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1a A flow chart of a vehicle sliding resistance testing method provided in Embodiment 1 of the present invention;

[0021] Figure 1b A schematic flow chart of a vehicle sliding resistance test method is provided for the first embodiment;

[0022] Figure 2 A schematic diagram of the structure of a vehicle sliding resistance testing device provided in Embodiment 2 of the present invention;

[0023] Figure 3 It is a structural schematic diagram of an electronic device for implementing the vehicle sliding resistance testing method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Embodiment 1

[0027] Figure 1a This is a flow chart of a vehicle sliding resistance test method provided in the first embodiment of the present invention. This embodiment is applicable to the case of performing sliding resistance matching test on a vehicle. The method can be executed by a vehicle sliding resistance test device. The vehicle sliding resistance test device can be implemented in the form of hardware and / or software. The vehicle sliding resistance test device can be configured in the host computer of the test system. Figure 1a As shown, the method includes:

[0028] S110. When it is determined that the vehicle to be tested meets the coasting test conditions, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed.

[0029] In this embodiment, the sliding resistance test of the vehicle to be tested can be carried out on a simulated road, wherein the simulated road can be realized by a four-wheel drive dynamometer. The vehicle to be tested can typically be a new energy vehicle. Specifically, the motor of the vehicle to be tested and its VCU (Vehicle Control Unit) related wiring harness can be installed on the four-wheel drive dynamometer to construct a test environment for the vehicle sliding resistance test.

[0030] Before conducting a coasting resistance test, it is possible to determine whether the vehicle state of the vehicle to be tested meets the coasting test conditions. If so, the speed of the vehicle to be tested can be controlled to be adjusted to a first preset speed and then coasting can be started. The speed of the vehicle to be tested can be reduced to a second preset speed, and the current coasting process can be ended.

[0031] In an optional implementation, the energy status and gear status of the vehicle to be tested may be obtained; when it is determined that the vehicle to be tested meets the coasting test conditions based on the energy status and gear status, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed.

[0032] Optionally, after obtaining the energy status and gear status of the vehicle to be tested, it is also possible to determine whether the energy status reaches a preset energy threshold and detect whether the gear status is neutral; when the energy status reaches the preset energy threshold and the gear status is neutral, it is triggered that when it is determined that the vehicle to be tested meets the coasting test conditions based on the energy status and gear status, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed.

[0033] For new energy vehicles to be tested, their energy status can refer to the battery power status, and the preset energy threshold can correspondingly refer to the preset power threshold; for traditional fuel vehicles to be tested, their energy status can refer to the fuel level status of the tank, and the preset energy status can refer to the preset fuel level threshold.

[0034] Taking the new energy vehicle to be tested as an example, the power status of the vehicle to be tested can be detected. If the power does not reach the preset power threshold, the battery of the vehicle to be tested can be charged. When the power reaches the preset power threshold, the gear message uploaded by the VCU of the vehicle to be tested through CAN communication can be used to detect whether the gear of the vehicle to be tested is neutral. If not, an instruction can be sent to the VCU to adjust the gear of the vehicle to be tested to neutral. At this time, it can be determined that the vehicle to be tested meets the coasting test conditions. Further, the four-wheel drive dynamometer can be controlled to drive the motor of the vehicle to be tested to adjust the vehicle speed to the first preset speed, and then the vehicle to be tested can be controlled to start coasting, so that the speed of the vehicle to be tested is reduced to the second preset speed.

[0035] Optionally, adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting so that the speed of the vehicle to be tested is reduced to a second preset speed may include: adjusting the speed of the vehicle to be tested to a preset initial speed; adjusting the speed of the vehicle to be tested from the preset initial speed to the first preset speed according to a preset difference and controlling the vehicle to be tested to start coasting so that the speed of the vehicle to be tested is reduced to the second preset speed.

[0036] For example, the dynamometer is controlled to accelerate the vehicle to a preset initial speed (e.g., 120 km / h), and the speed of the vehicle to be tested can be further adjusted from the preset initial speed to a first preset speed (e.g., 125 km / h) according to a preset difference (e.g., ΔV=5 km / h), and the vehicle to be tested can be controlled to start sliding from 125 km / h, so that the speed of the vehicle to be tested is reduced to a second preset speed (e.g., 15 km / h).

[0037] S120. Determine, according to the current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process, the error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance.

[0038] In an optional implementation, the real-time wheel speed and real-time wheel resistance of the vehicle to be tested during the current gliding process can be obtained; based on the real-time wheel speed and real-time wheel resistance during the current gliding process, the current gliding resistance coefficient corresponding to the vehicle to be tested during the current gliding process is determined; the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start gliding is returned to execute, so that the vehicle to be tested performs the next gliding process; during the next gliding process, the predicted gliding resistance of the vehicle to be tested is obtained based on the current gliding resistance coefficient, and the actual gliding resistance of the vehicle to be tested is obtained; and the error result is determined based on the predicted gliding resistance and the actual gliding resistance.

[0039] In this embodiment, a set of corresponding current gliding resistance coefficients can be obtained according to the real-time wheel speed and real-time wheel resistance of the current gliding process, the gliding resistance can be predicted in the next gliding process using the current gliding resistance coefficients, and the error result can be determined using the predicted gliding resistance and the actual gliding resistance in the next gliding process.

[0040] Based on the above optional implementation manner, according to the real-time wheel speed and the real-time wheel resistance in the current gliding process, the current gliding resistance coefficient corresponding to the vehicle to be tested in the current gliding process is determined, including: performing fitting operation on the real-time wheel speed and the real-time wheel resistance in the current gliding process, and constructing a current corresponding relationship among the current gliding resistance coefficient, the real-time wheel speed and the real-time wheel resistance; determining the current gliding resistance coefficient corresponding to the vehicle to be tested in the current gliding process according to the current corresponding relationship.

[0041] Specifically, the real-time wheel speed v of the current gliding process and the arithmetic mean of the real-time wheel resistance F can be fitted to obtain a quadratic function, for example, F=a+b*v+c*v*v, wherein F is the real-time wheel resistance and v is the real-time wheel speed, from which the coefficients a, b and c can be derived.

[0042] S130. When the error result exceeds the preset error threshold, return to the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start gliding, and determine a new current gliding resistance coefficient until the error result does not exceed the preset error threshold, and end the gliding process to implement the gliding resistance test of the vehicle to be tested.

[0043] In this embodiment, the error result can be reflected by the error between the falling time of each speed segment during the coasting process and the actual road parking time. When the error result shows that the error exceeds the preset error threshold, the coasting resistance iteration test is performed, and the resistance after a, b and c are substituted (equivalent to the predicted coasting resistance) is matched with the actual coasting resistance during the coasting iteration process until the error result does not exceed the preset error threshold, and the coasting process is terminated to realize the coasting resistance test of the vehicle to be tested.

[0044] Optionally, when the error result does not exceed a preset error threshold, the gliding process is directly terminated to implement the gliding resistance test of the vehicle to be tested.

[0045] The technical solution of the embodiment of the present invention is as follows: when it is determined that the vehicle to be tested meets the coasting test conditions, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed; according to the current coasting resistance coefficient corresponding to the vehicle to be tested in the current coasting process, the error result between the predicted coasting resistance corresponding to the current coasting resistance coefficient in the next coasting process and the actual coasting resistance is determined; when the error result exceeds the preset error threshold, the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting is returned, and a new current coasting resistance coefficient is determined until the error result does not exceed the preset error threshold, and the coasting process is terminated to realize the coasting resistance test of the vehicle to be tested. The embodiment of the present invention adopts the technical means of iteratively testing the coasting resistance, which solves the problem that the existing road test has poor controllability and is difficult to transplant to the bench test, resulting in inaccurate coasting resistance test results, ensures the accuracy of the test results and makes the test process simple and controllable.

[0046] In order to enable those skilled in the art to better understand the vehicle sliding resistance test method of this embodiment, Figure 1b A schematic flow chart of a vehicle sliding resistance testing method is provided for the first embodiment.

[0047] Install the motor of the vehicle to be tested and its VCU-related wiring harness on the four-wheel drive dynamometer;

[0048] Detect the power level of the battery pack and charge the battery pack when it needs to be charged;

[0049] When the battery pack does not need to be charged or is charged to the point where it does not need to be further charged, the gear position of the vehicle to be tested is detected to make the gear position of the vehicle to be tested be in a neutral state;

[0050] The four-wheel drive dynamometer is controlled to increase the vehicle speed to a first preset vehicle speed and then start sliding, and the wheel speed (equivalent to the wheel speed) and output resistance (equivalent to the wheel resistance) of the motor are collected in real time, and the corresponding relationship is calculated;

[0051] The sliding resistance coefficient is inferred and checked to see if it meets the requirements. If the sliding time error is large, the control of the four-wheel drive dynamometer is returned to increase the vehicle speed to the first preset speed for iterative execution until the sliding time error meets the requirements, completing the sliding matching calculation.

[0052] Embodiment 2

[0053] Figure 2 This is a schematic diagram of the structure of a vehicle sliding resistance test device provided in the second embodiment of the present invention. Figure 2 As shown, the device includes: a vehicle coasting control module 210, an error result determination module 220 and a first coasting end module 230. Among them:

[0054] The vehicle coasting control module 210 is used to adjust the speed of the vehicle to be tested to a first preset speed and control the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed when it is determined that the vehicle to be tested meets the coasting test conditions;

[0055] The error result determination module 220 is used to determine the error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance according to the current sliding resistance coefficient corresponding to the vehicle under test in the current sliding process;

[0056] The first coasting end module 230 is used to return to the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting when the error result exceeds the preset error threshold, and determine a new current coasting resistance coefficient until the error result does not exceed the preset error threshold, thereby ending the coasting process to implement a coasting resistance test on the vehicle to be tested.

[0057] The technical solution of the embodiment of the present invention is as follows: when it is determined that the vehicle to be tested meets the coasting test conditions, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed; according to the current coasting resistance coefficient corresponding to the vehicle to be tested in the current coasting process, the error result between the predicted coasting resistance corresponding to the current coasting resistance coefficient in the next coasting process and the actual coasting resistance is determined; when the error result exceeds the preset error threshold, the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting is returned, and a new current coasting resistance coefficient is determined until the error result does not exceed the preset error threshold, and the coasting process is terminated to realize the coasting resistance test of the vehicle to be tested. The embodiment of the present invention adopts the technical means of iteratively testing the coasting resistance, which solves the problem that the existing road test has poor controllability and is difficult to transplant to the bench test, resulting in inaccurate coasting resistance test results, ensures the accuracy of the test results and makes the test process simple and controllable.

[0058] Optionally, the vehicle sliding control module 210 includes:

[0059] A vehicle state acquisition unit, used to acquire the energy state and gear state of the vehicle to be tested;

[0060] The coasting control unit is used to adjust the speed of the vehicle to be tested to a first preset speed and control the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed when it is determined that the vehicle to be tested meets the coasting test conditions according to the energy state and the gear state.

[0061] Optionally, the vehicle sliding resistance testing device further includes a vehicle state judgment module, which is used to, after obtaining the energy state and gear state of the vehicle to be tested:

[0062] Determining whether the energy state reaches a preset energy threshold, and detecting whether the gear state is neutral;

[0063] When the energy state reaches the preset energy threshold and the gear state is neutral, the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting is triggered, and reducing the speed of the vehicle to be tested to a second preset speed, when it is determined that the vehicle to be tested meets the coasting test conditions according to the energy state and the gear state.

[0064] Optionally, the control sliding unit can be used to:

[0065] Adjusting the speed of the vehicle to be tested to a preset initial speed;

[0066] The speed of the vehicle to be tested is adjusted from the preset initial speed to the first preset speed according to the preset difference, and the vehicle to be tested is controlled to start sliding, so that the speed of the vehicle to be tested is reduced to the second preset speed.

[0067] Optionally, the error result determination module 220 includes:

[0068] A real-time data acquisition unit, used to acquire the real-time wheel speed and real-time wheel resistance of the vehicle to be tested during the current sliding process;

[0069] a current sliding resistance coefficient determining unit, used to determine a current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process according to the real-time wheel side speed and the real-time wheel side resistance in the current sliding process;

[0070] The coasting process return execution unit is used to return to the execution of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting, so that the vehicle to be tested performs the next coasting process;

[0071] a sliding resistance acquisition unit, configured to obtain the predicted sliding resistance of the vehicle to be tested according to the current sliding resistance coefficient during the next sliding process, and to obtain the actual sliding resistance of the vehicle to be tested;

[0072] The error result determining unit is used to determine the error result according to the predicted sliding resistance and the actual sliding resistance.

[0073] Optionally, the current sliding resistance coefficient determination unit may be specifically used for:

[0074] Performing a fitting operation on the real-time wheel speed and the real-time wheel resistance during the current sliding process to construct a current corresponding relationship among the current sliding resistance coefficient, the real-time wheel speed and the real-time wheel resistance;

[0075] The current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process is determined according to the current corresponding relationship.

[0076] Optionally, the vehicle sliding resistance testing device further includes a second sliding end module, which is used to:

[0077] When the error result does not exceed the preset error threshold, the sliding process is directly terminated to implement the sliding resistance test of the vehicle to be tested.

[0078] The vehicle sliding resistance testing device provided in the embodiment of the present invention can execute the vehicle sliding resistance testing method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0079] Embodiment 3

[0080] Figure 3 A schematic diagram of an electronic device 300 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers or various forms of mobile devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0081] like Figure 3 As shown, the electronic device 300 includes at least one processor 301, and a memory connected to the at least one processor 301, such as a read-only memory (ROM) 302, a random access memory (RAM) 303, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 301 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 302 or the computer program loaded from the storage unit 308 to the random access memory (RAM) 303. In the RAM 303, various programs and data required for the operation of the electronic device 300 can also be stored. The processor 301, the ROM 302, and the RAM 303 are connected to each other via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0082] A number of components in the electronic device 300 are connected to the I / O interface 305, including: an input unit 306, such as a keyboard, a mouse, etc.; an output unit 307, such as various types of displays, speakers, etc.; a storage unit 308, such as a disk, an optical disk, etc.; and a communication unit 309, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 309 allows the electronic device 300 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0083] The processor 301 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 301 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 301 performs the various methods and processes described above, such as a vehicle sliding resistance test method.

[0084] In some embodiments, the vehicle sliding resistance test method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 308. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 300 via the ROM 302 and / or the communication unit 309. When the computer program is loaded into the RAM 303 and executed by the processor 301, one or more steps of the vehicle sliding resistance test method described above may be performed. Alternatively, in other embodiments, the processor 301 may be configured to execute the vehicle sliding resistance test method in any other appropriate manner (e.g., by means of firmware).

[0085] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0086] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0087] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0088] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0089] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0090] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0091] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0092] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle sliding resistance test method, characterized in that: include: When it is determined that the vehicle to be tested meets the coasting test conditions, adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed; Determining, according to the current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process, an error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance; In the case where the error result exceeds the preset error threshold, returning to the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start sliding, and determining a new current sliding resistance coefficient until the error result does not exceed the preset error threshold, and ending the sliding process to implement the sliding resistance test of the vehicle to be tested; When the error result does not exceed a preset error threshold, directly ending the sliding process to implement the sliding resistance test of the vehicle to be tested; Wherein, determining the error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance according to the current sliding resistance coefficient of the vehicle to be tested in the current sliding process includes: Obtaining the real-time wheel speed and real-time wheel resistance of the vehicle to be tested during the current sliding process; Determining a current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process according to the real-time wheel speed and the real-time wheel resistance in the current sliding process; Returning to the operation of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting, so that the vehicle to be tested performs the next coasting process; obtaining the predicted sliding resistance of the vehicle to be tested according to the current sliding resistance coefficient during the next sliding process, and obtaining the actual sliding resistance of the vehicle to be tested; The error result is determined according to the predicted sliding resistance and the actual sliding resistance; the error result is reflected by the error between the descending time of each speed segment during the sliding process and the actual road stopping time.

2. The method according to claim 1, characterized in that When it is determined that the vehicle to be tested meets the coasting test condition, adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed, including: Obtaining the energy state and gear state of the vehicle to be tested; When it is determined according to the energy state and the gear state that the vehicle to be tested meets the coasting test conditions, the speed of the vehicle to be tested is adjusted to a first preset speed and the vehicle to be tested is controlled to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed.

3. The method according to claim 2, characterized in that After obtaining the energy state and gear state of the vehicle to be tested, the method further includes: Determining whether the energy state reaches a preset energy threshold, and detecting whether the gear state is neutral; When the energy state reaches the preset energy threshold and the gear state is neutral, the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting is triggered, and reducing the speed of the vehicle to be tested to a second preset speed, when it is determined that the vehicle to be tested meets the coasting test conditions according to the energy state and the gear state.

4. The method according to claim 1, characterized in that The method of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start sliding, so that the speed of the vehicle to be tested is reduced to a second preset speed, includes: Adjusting the speed of the vehicle to be tested to a preset initial speed; The speed of the vehicle to be tested is adjusted from the preset initial speed to the first preset speed according to the preset difference, and the vehicle to be tested is controlled to start sliding, so that the speed of the vehicle to be tested is reduced to the second preset speed.

5. The method according to claim 1, characterized in that Determining a current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process according to the real-time wheel speed and the real-time wheel resistance in the current sliding process includes: Performing a fitting operation on the real-time wheel speed and the real-time wheel resistance during the current sliding process to construct a current corresponding relationship among the current sliding resistance coefficient, the real-time wheel speed and the real-time wheel resistance; The current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process is determined according to the current corresponding relationship.

6. A vehicle sliding resistance testing device, characterized in that: include: A vehicle coasting control module, for adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, so that the speed of the vehicle to be tested is reduced to a second preset speed, when it is determined that the vehicle to be tested meets the coasting test conditions; an error result determination module, used to determine the error result between the predicted sliding resistance corresponding to the current sliding resistance coefficient in the next sliding process and the actual sliding resistance according to the current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process; A first coasting end module, used for, when the error result exceeds a preset error threshold, returning to execute the operation of adjusting the speed of the vehicle to be tested to a first preset speed and controlling the vehicle to be tested to start coasting, and determining a new current coasting resistance coefficient until the error result does not exceed the preset error threshold, and ending the coasting process to implement a coasting resistance test on the vehicle to be tested; A second sliding end module, used for directly ending the sliding process to implement the sliding resistance test of the vehicle to be tested when the error result does not exceed a preset error threshold; Wherein, the error result determination module includes: A real-time data acquisition unit, used to acquire the real-time wheel speed and real-time wheel resistance of the vehicle to be tested during the current sliding process; a current sliding resistance coefficient determining unit, used to determine a current sliding resistance coefficient corresponding to the vehicle to be tested in the current sliding process according to the real-time wheel side speed and the real-time wheel side resistance in the current sliding process; The coasting process return execution unit is used to return to the execution of adjusting the speed of the vehicle to be tested to the first preset speed and controlling the vehicle to be tested to start coasting, so that the vehicle to be tested performs the next coasting process; a sliding resistance acquisition unit, configured to obtain the predicted sliding resistance of the vehicle to be tested according to the current sliding resistance coefficient during the next sliding process, and to obtain the actual sliding resistance of the vehicle to be tested; The error result determination unit is used to determine the error result according to the predicted sliding resistance and the actual sliding resistance; the error result is reflected by the error between the descending time of each speed segment during the sliding process and the actual road stopping time.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the vehicle sliding resistance testing method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vehicle sliding resistance testing method according to any one of claims 1 to 5 when executed.

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