CN116572867A - Vehicle speed signal diagnosis method, device, equipment and storage medium - Google Patents
Vehicle speed signal diagnosis method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a vehicle speed signal diagnosis method, a vehicle speed signal diagnosis device, vehicle speed signal diagnosis equipment and a storage medium. Comprising the following steps: acquiring a speed related signal of a current vehicle, wherein the speed related signal comprises a speed signal and an acceleration signal; generating an electrical fault diagnosis result according to the vehicle speed related signal; and when the electrical fault diagnosis result is that diagnosis is normal, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal. The electrical fault diagnosis result is determined through the speed signal and the acceleration signal of the current vehicle, when the electrical fault diagnosis result is normal diagnosis, the vehicle speed signal diagnosis result is generated through the vehicle speed related signal, so that the reasonable fault of the vehicle speed signal can be accurately diagnosed, the vehicle performance can be degraded to enter a relatively safe state, the safety of personnel and vehicles is further ensured, the application range is wider, and even if the vehicle is in a gear shifting process or in a place with weaker GPS signals such as a tunnel, the diagnosis can be normally performed without interrupting the diagnosis.
Description
Technical Field
The present invention relates to the field of vehicle diagnosis technologies, and in particular, to a vehicle speed signal diagnosis method, device, apparatus, and storage medium.
Background
The vehicle speed signal is not only an important input quantity of the engine electric control system and directly affects the normal operation of the whole vehicle running function, but also is a monitoring condition of a plurality of components in the electric control system and participates in the calculation of the common denominator of the in-use monitoring frequency. According to the regulations in the light automobile pollutant emission limit value and measurement method, the rationality diagnosis of the automobile speed signal is required.
The presently known rationality diagnosis schemes for vehicle speed signals mainly include the following: first, the vehicle speed exceeds the vehicle design maximum vehicle speed; secondly, checking a vehicle speed signal and a wheel speed signal; thirdly, verifying a reference vehicle speed and a vehicle speed signal calculated through a GPS signal; fourth, under specific working conditions, according to the engine speed and the speed ratio of the gearbox, the wheel radius calculates the reference vehicle speed and the vehicle speed signal for verification.
The failure mode that the first scheme above can diagnose is too single. Because the speed signals of most vehicles at present are calculated by a chassis electric control system according to four wheel speed sensor signals and are not acquired by independent speed sensors, the second scheme is applicable to limited vehicle types. The third solution requires the vehicle to be equipped with a GPS system and the diagnostic reliability is reduced when the GPS signal is weak (in tunnels, weather, etc.). The fourth solution cannot be used during vehicle gear shifting.
Disclosure of Invention
The invention provides a vehicle speed signal diagnosis method, device, equipment and storage medium, which are used for realizing rapid and accurate diagnosis of rationality faults of a vehicle speed signal.
According to an aspect of the present invention, there is provided a vehicle speed signal diagnosis method including:
acquiring a speed related signal of a current vehicle, wherein the speed related signal comprises a speed signal and an acceleration signal;
generating an electrical fault diagnosis result according to the vehicle speed related signal;
and when the electrical fault diagnosis result is that diagnosis is normal, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal.
Optionally, acquiring a vehicle speed related signal of the current vehicle includes: acquiring the wheel speed and the wheel acceleration of each sensor at the wheel; the wheel speeds and the accelerations of the wheels are input into a preset algorithm through a chassis controller to generate vehicle speed related signals, wherein the vehicle speed signals and the accelerations comprise effective information, and the effective information comprises effective marks and ineffective marks.
Optionally, generating an electrical fault diagnosis result according to the vehicle speed related signal includes: judging whether the vehicle speed signal and the acceleration signal both comprise effective marks, if so, acquiring signal duration, and generating an electrical fault diagnosis result according to the signal duration; otherwise, determining the electrical fault diagnosis result as diagnosis abnormality.
Optionally, generating the electrical fault diagnosis result according to the signal duration includes: judging whether the signal duration is greater than or equal to a first time threshold, if so, determining that the electrical fault diagnosis result is normal diagnosis; otherwise, determining the electrical fault diagnosis result as diagnosis abnormality.
Optionally, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal includes: determining a reference acceleration according to the vehicle speed signal; low-pass filtering the reference acceleration and the acceleration signal to obtain a first acceleration and a second acceleration, wherein the first acceleration and the second acceleration are burr-free and have the same phase; determining a difference between the first acceleration and the second acceleration; judging whether the difference value is greater than or equal to a preset threshold value, if so, acquiring a first duration, and when the first duration is greater than or equal to a second time threshold value, determining that the diagnosis result of the vehicle speed signal is abnormal; otherwise, acquiring a second duration, and determining that the diagnosis result of the vehicle speed signal is normal when the second duration is greater than or equal to a second time threshold.
Optionally, determining the reference acceleration according to the vehicle speed signal includes: determining a gradient corresponding to the vehicle speed signal; the specified time range is acquired, and the ratio of the gradient to the specified time range is calculated to generate the reference acceleration.
Optionally, after determining that the diagnosis result of the vehicle speed signal is the diagnosis abnormality, the method further includes: generating fault degradation information according to the vehicle speed related signals; and performing performance degradation on the current vehicle according to the fault degradation information.
According to another aspect of the present invention, there is provided a vehicle speed signal diagnosis apparatus including:
the vehicle speed related signal acquisition module is used for acquiring a vehicle speed related signal of the current vehicle, wherein the vehicle speed related signal comprises a vehicle speed signal and an acceleration signal;
the electrical fault diagnosis result generation module is used for generating an electrical fault diagnosis result according to the vehicle speed related signal;
and the vehicle speed signal diagnosis result generation module is used for generating a vehicle speed signal diagnosis result according to the vehicle speed related signal when the electrical fault diagnosis result is that diagnosis is normal.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform a vehicle speed signal diagnostic method according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to execute a vehicle speed signal diagnosis method according to any one of the embodiments of the present invention.
According to the technical scheme, the electrical fault diagnosis result is determined through the speed signal and the acceleration signal of the current vehicle, when the electrical fault diagnosis result is normal diagnosis, the vehicle speed signal diagnosis result is generated through the vehicle speed related signal, so that the rationality fault of the vehicle speed signal can be accurately diagnosed, the vehicle performance can be degraded to enter a relatively safe state, the safety of personnel and vehicles is further ensured, the application range is wider, and even if the vehicle is in a gear shifting process or in a place with weak GPS signals such as a tunnel, the diagnosis can be normally performed without interrupting the diagnosis.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a vehicle speed signal diagnostic method provided in accordance with a first embodiment of the present invention;
FIG. 2 is a flow chart of another vehicle speed signal diagnostic method provided in accordance with a first embodiment of the present invention;
FIG. 3 is a flowchart of another vehicle speed signal diagnostic method provided in accordance with a second embodiment of the present invention;
fig. 4 is a schematic structural view of a vehicle speed signal diagnosis device according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device implementing a vehicle speed signal diagnosis method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a vehicle speed signal diagnosis method according to an embodiment of the present invention, where the method may be applied to a case of performing a rational fault diagnosis on a vehicle speed signal, and the method may be performed by a vehicle speed signal diagnosis device, which may be implemented in the form of hardware and/or software, and the vehicle speed signal diagnosis device may be configured in a vehicle controller. As shown in fig. 1, the method includes:
s110, acquiring a vehicle speed related signal of the current vehicle, wherein the vehicle speed related signal comprises a vehicle speed signal and an acceleration signal.
The vehicle speed signal refers to the speed information of the current vehicle in the running process, the vehicle speed signal can be determined by the chassis controller through each wheel speed, the acceleration signal refers to the acceleration information of the current vehicle in the running process, and the vehicle speed signal is determined by the chassis controller through each wheel acceleration. The vehicle speed signal is an important parameter for controlling output torque of the engine and calculating a gear shift line by a gearbox controller. If the vehicle speed signal is abnormal, the vehicle power can suddenly change and shift gear abnormally, and if the vehicle is shifted to a high gear in the climbing process, the climbing performance of the vehicle is affected; if the vehicle is shifted to a low gear during high-speed running, the engine speed is increased suddenly, the power performance and economy of the vehicle are reduced, the transmission body is easily damaged, and in order to ensure the safety of the vehicle and the driver, a vehicle speed signal is diagnosed in the embodiment.
Optionally, acquiring a vehicle speed related signal of the current vehicle includes: acquiring the wheel speed and the wheel acceleration of each sensor at the wheel; the wheel speeds and the accelerations of the wheels are input into a preset algorithm through a chassis controller to generate vehicle speed related signals, wherein the vehicle speed signals and the accelerations comprise effective information, and the effective information comprises effective marks and ineffective marks.
Specifically, the chassis controller inputs the acquired wheel speeds and the acquired wheel accelerations into a preset algorithm to calculate, and determines whether the vehicle speed signals or the acceleration signals are credible or not according to the magnitudes of the wheel speeds and the wheel accelerations during calculation, if so, effective information containing effective marks is generated, and if not, the chassis controller also generates the vehicle speed signals and the acceleration signals, wherein the effective information contains ineffective marks. For example, when the chassis controller determines that the left and right wheel sensors are widely different, exceeding a preset difference threshold, a vehicle speed can also be calculated, but at this time the vehicle speed is not trusted. The chassis also generates a vehicle speed signal, but at this point the vehicle speed signal includes an invalid flag. Of course, the present embodiment is described by taking an example of comparing the difference between the left and right wheel sensors to determine and generate the effective information, and in practical application, it may be determined whether the line has a short-circuit and open-circuit fault to generate the effective information, and the method of generating the effective information is not limited in the present embodiment.
S120, generating an electrical fault diagnosis result according to the vehicle speed related signal.
Specifically, since the vehicle speed signal and the acceleration signal both include effective information, the electrical fault diagnosis result can be generated by recognizing the effective information. The electrical faults refer to electrical faults of wheel number sensors or acceleration sensors participating in vehicle speed calculation, and comprise wheel speed sensor existing circuits, numerical value oversrange, acceleration sensor existing circuits, numerical value oversrange and the like participating in vehicle speed calculation.
And S130, when the electrical fault diagnosis result is that diagnosis is normal, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal.
Specifically, if the wheel speed sensor and the acceleration sensor involved in the calculation of the vehicle speed have electrical faults, the accuracy of the diagnosis result of the vehicle speed signal can be affected, so that the controller can send prompt information to the user client, the user can conveniently grasp the abnormal condition of the wheel speed sensor or the acceleration sensor in time, and the user can check and adjust the related sensor involved in the calculation of the vehicle speed, thereby ensuring the accurate diagnosis of the subsequent vehicle speed signal.
Fig. 2 is a flowchart of a vehicle speed signal diagnosis method according to an embodiment of the present invention, and step S130 mainly includes steps S131 to S136 as follows:
s131, when the electrical fault diagnosis result is that diagnosis is normal, determining reference acceleration according to a vehicle speed signal.
Optionally, determining the reference acceleration according to the vehicle speed signal includes: determining a gradient corresponding to the vehicle speed signal; the specified time range is acquired, and the ratio of the gradient to the specified time range is calculated to generate the reference acceleration.
Specifically, when the electrical fault diagnosis result is normal, the vehicle reference acceleration can be calculated by adopting a vehicle speed signal and time derivative mode, for example, a first-order backward differential mode of a discrete signal, namely (current sampling point vehicle speed-previous sampling point vehicle speed)/sampling time, and the reference acceleration can be calculated.
S132, carrying out low-pass filtering on the reference acceleration and the acceleration signal to obtain a first acceleration and a second acceleration, wherein the first acceleration and the second acceleration are burr-free and have the same phase.
Specifically, the controller may perform low-pass filtering on the reference acceleration to obtain a filtered first acceleration, and perform low-pass filtering on the acceleration signal to obtain a filtered second acceleration. The purpose of the filtering is to remove signal burrs, so that the signal is more stable, and meanwhile, the received vehicle speed signal and the received acceleration signal are not necessarily synchronous, and the phase and synchronous signal can be adjusted through low-pass filtering. That is, the first acceleration and the second acceleration that are low-pass filtered are burr-free and have the same phase. By way of example, a first-order lag low-pass filtering mode can be adopted, different calibratable filtering time constants are respectively adopted for filtering the reference acceleration and the acceleration signal, and the first acceleration and the second acceleration are free of burrs and have the same phase by calibrating the two time constants.
S133, determining a difference value between the first acceleration and the second acceleration.
S134, judging whether the difference value is larger than or equal to a preset threshold value, if so, executing S135, otherwise, executing S136.
S135, acquiring a first duration, and determining that the diagnosis result of the vehicle speed signal is abnormal when the first duration is greater than or equal to a second time threshold.
Specifically, the difference between the first acceleration and the second acceleration may be determined, where the difference refers to an absolute value of the difference between the first acceleration and the second acceleration, that is, the filtered first acceleration and the filtered second acceleration are differenced and taken as an absolute value, and then the difference is compared with a preset threshold, where the preset threshold is a calibratable parameter, and the user may adjust the preset threshold according to the diagnosis requirement, where the preset threshold defaults to 2m/s 2 . When the difference value is greater than or equal to a preset threshold value, the controller can acquire a first duration time, and when the first duration time is greater than or equal to a second time threshold value, namely, when the difference value is greater than or equal to the preset threshold value and the duration time is longer than the preset threshold value, the diagnosis result of the vehicle speed signal can be determined to be abnormal, and at the moment, the vehicle speed signal has a rationality fault. The second time threshold is a calibratable parameter, and defaults to 3000ms.
Optionally, after determining that the diagnosis result of the vehicle speed signal is the diagnosis abnormality, the method further includes: generating fault degradation information according to the vehicle speed related signals; and performing performance degradation on the current vehicle according to the fault degradation information.
Specifically, after the diagnosis result of the vehicle speed signal is determined to be the diagnosis abnormality, it may be determined that the vehicle speed signal has a rational fault and a fault process is performed to degrade the vehicle performance to enter a relatively safe state. At the moment, the controller can generate fault degradation information according to the vehicle speed related signals, then performance degradation can be carried out on the current vehicle, safety of personnel and vehicles is guaranteed, and meanwhile the requirement of the in-use monitoring frequency specified in regulations is met. Compared with the prior art, the technical scheme of the invention is more comprehensive in applicable fault mode, and diagnosis can be normally performed without interrupting diagnosis even if the vehicle is in a gear shifting process or in a place with weaker GPS signals such as a tunnel.
S136, acquiring a second duration, and determining that the diagnosis result of the vehicle speed signal is normal when the second duration is greater than or equal to a second time threshold.
Specifically, when the difference value is smaller than the preset threshold value, the controller may acquire the second duration, and when the second duration is greater than or equal to the second time threshold value, that is, the difference value is smaller than the preset threshold value and lasts for a period of time, the controller may determine that the vehicle speed signal rationality ready state is completed and has no fault, that is, determine that the diagnosis result of the vehicle speed signal is normal.
According to the technical scheme, the electrical fault diagnosis result is determined through the speed signal and the acceleration signal of the current vehicle, when the electrical fault diagnosis result is normal diagnosis, the vehicle speed signal diagnosis result is generated through the vehicle speed related signal, so that the rationality fault of the vehicle speed signal can be accurately diagnosed, the vehicle performance can be degraded to enter a relatively safe state, the safety of personnel and vehicles is further ensured, the application range is wider, and even if the vehicle is in a gear shifting process or in a place with weak GPS signals such as a tunnel, the diagnosis can be normally performed without interrupting the diagnosis.
Example two
Fig. 3 is a flowchart of a vehicle speed signal diagnosis method according to a second embodiment of the present invention, in which a specific process of generating an electrical fault diagnosis result according to a vehicle speed related signal is added on the basis of the first embodiment. The specific contents of steps S210 and S270 are substantially the same as steps S110 and S130 in the first embodiment, so that a detailed description is omitted in this embodiment. As shown in fig. 3, the method includes:
s210, acquiring a vehicle speed related signal of the current vehicle, wherein the vehicle speed related signal comprises a vehicle speed signal and an acceleration signal.
Optionally, acquiring a vehicle speed related signal of the current vehicle includes: acquiring the wheel speed and the wheel acceleration of each sensor at the wheel; the wheel speeds and the accelerations of the wheels are input into a preset algorithm through a chassis controller to generate vehicle speed related signals, wherein the vehicle speed signals and the accelerations comprise effective information, and the effective information comprises effective marks and ineffective marks.
S220, judging whether the vehicle speed signal and the acceleration signal both comprise valid marks, if so, executing S230-S240, otherwise, executing S260.
In some embodiments, the controller determines whether the vehicle speed signal is a valid flag b_v, if the wheel speed sensor involved in the vehicle speed calculation has a fault such as a circuit and a numerical value out-of-range, the fault is "FALSE", otherwise "TRUE", and then determines whether the acceleration signal is a valid flag b_a, if the acceleration sensor has a fault such as a circuit and a numerical value out-of-range, the fault is "FALSE", otherwise "TRUE".
In some embodiments, the disable flag may also be a defined special value, such as 65535, indicating that the vehicle speed signal or acceleration signal is disabled if the special value is detected as being present in the vehicle speed signal or acceleration signal message.
S230, acquiring signal duration.
S240, judging whether the signal duration is greater than or equal to a first time threshold, if so, executing S250 and S270, otherwise, executing S260.
S250, determining that the electrical fault diagnosis result is normal diagnosis.
S260, determining the electrical fault diagnosis result as diagnosis abnormality.
For example, the engine electronic control system first determines whether the vehicle speed signal rationality diagnosis condition is satisfied according to b_ V, B _a, if any one of b_ V, B _a is "FALSE", determines that the electrical fault diagnosis result is abnormal, suspends the vehicle speed signal diagnosis, and determines that the electrical fault diagnosis result is normal until b_ V, B _a is all "TRUE" and is maintained for a period of time P1, and continues the vehicle speed signal diagnosis. P1 represents a first time threshold, which is a calibratable parameter, and is a default value of 1000ms.
S270, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal.
Optionally, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal includes: determining a reference acceleration according to the vehicle speed signal; low-pass filtering the reference acceleration and the acceleration signal to obtain a first acceleration and a second acceleration, wherein the first acceleration and the second acceleration are burr-free and have the same phase; determining a difference between the first acceleration and the second acceleration; judging whether the difference value is greater than or equal to a preset threshold value, if so, acquiring a first duration, and when the first duration is greater than or equal to a second time threshold value, determining that the diagnosis result of the vehicle speed signal is abnormal; otherwise, acquiring a second duration, and determining that the diagnosis result of the vehicle speed signal is normal when the second duration is greater than or equal to a second time threshold.
Optionally, determining the reference acceleration according to the vehicle speed signal includes: determining a gradient corresponding to the vehicle speed signal; the specified time range is acquired, and the ratio of the gradient to the specified time range is calculated to generate the reference acceleration.
Optionally, after determining that the diagnosis result of the vehicle speed signal is the diagnosis abnormality, the method further includes: generating fault degradation information according to the vehicle speed related signals; and performing performance degradation on the current vehicle according to the fault degradation information.
According to the technical scheme, the electrical fault diagnosis result is determined through the speed signal and the acceleration signal of the current vehicle, when the electrical fault diagnosis result is normal diagnosis, the vehicle speed signal diagnosis result is generated through the vehicle speed related signal, so that the rationality fault of the vehicle speed signal can be accurately diagnosed, the vehicle performance can be degraded to enter a relatively safe state, the safety of personnel and vehicles is further ensured, the application range is wider, and even if the vehicle is in a gear shifting process or in a place with weak GPS signals such as a tunnel, the diagnosis can be normally performed without interrupting the diagnosis.
Example III
Fig. 4 is a schematic structural diagram of a vehicle speed signal diagnosis device according to a third embodiment of the present invention.
As shown in fig. 4, the apparatus includes:
a vehicle speed related signal obtaining module 310, configured to obtain a vehicle speed related signal of a current vehicle, where the vehicle speed related signal includes a vehicle speed signal and an acceleration signal;
the electrical fault diagnosis result generating module 320 is configured to generate an electrical fault diagnosis result according to the vehicle speed related signal;
the vehicle speed signal diagnosis result generating module 330 is configured to generate a vehicle speed signal diagnosis result according to the vehicle speed related signal when the electrical fault diagnosis result is that the diagnosis is normal.
Optionally, the vehicle speed related signal acquisition module 310 is specifically configured to: acquiring the wheel speed and the wheel acceleration of each sensor at the wheel; the wheel speeds and the accelerations of the wheels are input into a preset algorithm through a chassis controller to generate vehicle speed related signals, wherein the vehicle speed signals and the accelerations comprise effective information, and the effective information comprises effective marks and ineffective marks.
Optionally, the electrical fault diagnosis result generating module 320 specifically includes: an effective mark judging unit for judging whether the vehicle speed signal and the acceleration signal both comprise effective marks; the signal duration time acquisition unit is used for acquiring the signal duration time when the vehicle speed signal and the acceleration signal both comprise the effective marks, and generating an electrical fault diagnosis result according to the signal duration time; and the diagnosis abnormality unit is used for determining the diagnosis result of the electrical faults as diagnosis abnormality when the vehicle speed signal and the acceleration signal do not comprise effective marks.
Optionally, the signal duration acquisition unit is specifically configured to: judging whether the signal duration is greater than or equal to a first time threshold, if so, determining that the electrical fault diagnosis result is normal diagnosis; otherwise, determining the electrical fault diagnosis result as diagnosis abnormality.
Optionally, the vehicle speed signal diagnosis result generating module 330 is specifically configured to: determining a reference acceleration according to the vehicle speed signal; low-pass filtering the reference acceleration and the acceleration signal to obtain a first acceleration and a second acceleration, wherein the first acceleration and the second acceleration are burr-free and have the same phase; determining a difference between the first acceleration and the second acceleration; judging whether the difference value is greater than or equal to a preset threshold value, if so, acquiring a first duration, and when the first duration is greater than or equal to a second time threshold value, determining that the diagnosis result of the vehicle speed signal is abnormal; otherwise, acquiring a second duration, and determining that the diagnosis result of the vehicle speed signal is normal when the second duration is greater than or equal to a second time threshold.
Optionally, the vehicle speed signal diagnosis result generating module 330 specifically includes: a reference acceleration determining unit for: determining a gradient corresponding to the vehicle speed signal; the specified time range is acquired, and the ratio of the gradient to the specified time range is calculated to generate the reference acceleration.
Optionally, the apparatus further comprises: the performance degradation module is used for generating fault degradation information according to the vehicle speed related signals after determining that the diagnosis result of the vehicle speed signals is abnormal; and performing performance degradation on the current vehicle according to the fault degradation information.
According to the technical scheme, the electrical fault diagnosis result is determined through the speed signal and the acceleration signal of the current vehicle, when the electrical fault diagnosis result is normal diagnosis, the vehicle speed signal diagnosis result is generated through the vehicle speed related signal, so that the rationality fault of the vehicle speed signal can be accurately diagnosed, the vehicle performance can be degraded to enter a relatively safe state, the safety of personnel and vehicles is further ensured, the application range is wider, and even if the vehicle is in a gear shifting process or in a place with weak GPS signals such as a tunnel, the diagnosis can be normally performed without interrupting the diagnosis.
The vehicle speed signal diagnosis device provided by the embodiment of the invention can execute the vehicle speed signal diagnosis method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 5 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the respective methods and processes described above, for example, a vehicle speed signal diagnosis method. Namely: acquiring a speed related signal of a current vehicle, wherein the speed related signal comprises a speed signal and an acceleration signal; generating an electrical fault diagnosis result according to the vehicle speed related signal; and when the electrical fault diagnosis result is that diagnosis is normal, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal.
In some embodiments, a vehicle speed signal diagnostic method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of a vehicle speed signal diagnosis method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform a vehicle speed signal diagnostic method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out 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, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can 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 a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, 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, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A vehicle speed signal diagnosis method, characterized by comprising:
acquiring a speed related signal of a current vehicle, wherein the speed related signal comprises a speed signal and an acceleration signal;
generating an electrical fault diagnosis result according to the vehicle speed related signal;
and when the electrical fault diagnosis result is that diagnosis is normal, generating a vehicle speed signal diagnosis result according to the vehicle speed related signal.
2. The method of claim 1, wherein the obtaining a vehicle speed related signal of the current vehicle comprises:
acquiring the wheel speed and the wheel acceleration of each sensor at the wheel;
and inputting the wheel speeds and the acceleration of each wheel into a preset algorithm through a chassis controller to generate the vehicle speed related signals, wherein the vehicle speed signals and the acceleration signals comprise effective information, and the effective information comprises effective marks and ineffective marks.
3. The method of claim 2, wherein generating an electrical fault diagnosis from the vehicle speed related signal comprises:
judging whether the vehicle speed signal and the acceleration signal both comprise effective marks, if so, acquiring signal duration, and generating an electrical fault diagnosis result according to the signal duration;
otherwise, determining the electrical fault diagnosis result as diagnosis abnormality.
4. A method according to claim 3, wherein said generating an electrical fault diagnosis from said signal duration comprises:
judging whether the signal duration is greater than or equal to a first time threshold, if so, determining that the electrical fault diagnosis result is normal diagnosis;
otherwise, determining the electrical fault diagnosis result as diagnosis abnormality.
5. The method of claim 1, wherein generating a vehicle speed signal diagnostic result from the vehicle speed related signal comprises:
determining a reference acceleration according to the vehicle speed signal;
low-pass filtering the reference acceleration and the acceleration signal to obtain a first acceleration and a second acceleration, wherein the first acceleration and the second acceleration are burr-free and have the same phase;
determining a difference between the first acceleration and the second acceleration;
judging whether the difference value is larger than or equal to a preset threshold value, if so, acquiring a first duration time, and determining that the diagnosis result of the vehicle speed signal is abnormal diagnosis when the first duration time is larger than or equal to a second time threshold value;
otherwise, acquiring a second duration, and determining that the diagnosis result of the vehicle speed signal is normal when the second duration is greater than or equal to a second time threshold.
6. The method of claim 5, wherein said determining a reference acceleration from said vehicle speed signal comprises:
determining a gradient corresponding to the vehicle speed signal;
and acquiring a specified time range, and calculating the ratio of the gradient to the specified time range to generate the reference acceleration.
7. The method according to claim 5, further comprising, after said determining that said vehicle speed signal diagnosis is a diagnosis abnormality:
generating fault degradation information according to the vehicle speed related signal;
and performing performance degradation on the current vehicle according to the fault degradation information.
8. A vehicle speed signal diagnostic apparatus, comprising:
the vehicle speed related signal acquisition module is used for acquiring a vehicle speed related signal of the current vehicle, wherein the vehicle speed related signal comprises a vehicle speed signal and an acceleration signal;
the electrical fault diagnosis result generation module is used for generating an electrical fault diagnosis result according to the vehicle speed related signal;
and the vehicle speed signal diagnosis result generation module is used for generating a vehicle speed signal diagnosis result according to the vehicle speed related signal when the electrical fault diagnosis result is normal.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A computer storage medium storing computer instructions for causing a processor to perform the method of any one of claims 1-7 when executed.
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| CN202310650936.8A CN116572867A (en) | 2023-06-02 | 2023-06-02 | Vehicle speed signal diagnosis method, device, equipment and storage medium |
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| CN202310650936.8A CN116572867A (en) | 2023-06-02 | 2023-06-02 | Vehicle speed signal diagnosis method, device, equipment and storage medium |
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