Early warning method and device for looseness of vehicle transmission shaft connecting flange plate and vehicle

Abstract

The invention relates to an early warning method and device for looseness of a vehicle transmission shaft connecting flange plate and a vehicle. The method comprises the steps that in response to vehicle starting, initial early warning parameters are determined, and in the vehicle running process, running parameters of the vehicle and target parameters used for representing the connecting condition of a transmission shaft flange plate and a driving shaft flange plate are obtained; according to the driving parameters and the initial early warning parameters, target early warning parameters are determined, and the target early warning parameters are used for early warning whether connection between the transmission shaft flange plate and the driving shaft flange plate is loose or not; and executing an early warning action according to the target early warning parameter and the target parameter. As the target early warning parameter can be determined according to the driving parameter of the vehicle, the target early warning parameter can be adjusted in real time based on the driving parameter of the vehicle, so that the vehicle can perform targeted early warning under different working conditions, the early warning accuracy can be improved, false triggering of early warning actions can be reduced, and the early warning efficiency is improved. And the driving experience of the vehicle user is improved.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically, to a method, device, and vehicle for early warning of loose transmission shaft connecting flanges in vehicles. Background Technology

[0002] In the automotive industry, a loose flange connected to the vehicle's driveshaft is a typical fault in the vehicle's transmission system, which may lead to problems such as abnormal noises, vehicle vibration, or even transmission failure.

[0003] In related technologies, the detection of whether a flange is loose is usually based on machine learning models, which has problems such as complex detection operations and poor detection results. Summary of the Invention

[0004] The purpose of this disclosure is to provide a method, device, and vehicle for early warning of loose driveshaft connection flanges in vehicles, in order to solve the aforementioned technical problems.

[0005] To achieve the above objectives, the first aspect of this disclosure provides a method for early warning of loose vehicle driveshaft connecting flanges, the method comprising: In response to vehicle startup, determine initial warning parameters; During vehicle operation, the vehicle's driving parameters and target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange are acquired. Based on the driving parameters and the initial warning parameters, a target warning parameter is determined. The target warning parameter is used to provide a warning about whether the connection between the drive shaft flange and the drive shaft flange is loose. Execute a warning action based on the target warning parameters and the target parameters.

[0006] Optionally, the initial warning parameters include initial vibration values ​​and / or initial axial displacement, the driving parameters include vehicle speed and / or vehicle torque, and determining the target warning parameters based on the driving parameters and the initial warning parameters includes: The target vibration value is determined based on the vehicle speed and the initial vibration value, and / or the target axial displacement is determined based on the vehicle torque and the initial axial displacement.

[0007] Optionally, determining the target vibration value based on the vehicle speed and the initial vibration value includes: A first product of a first preset value and the vehicle speed is determined, and the sum of the first product and a second preset value is determined. The product of the sum and the initial vibration value is then determined as the target vibration value.

[0008] Optionally, determining the target axial displacement based on the vehicle torque and the initial axial displacement includes: The absolute difference between the vehicle torque and the vehicle torque threshold is determined, and the second product of the absolute difference and the third preset value is determined. The sum of the second product and the initial axial displacement is determined as the target axial displacement.

[0009] Optionally, the initial warning parameters include initial vibration values ​​and / or initial axial displacement, and the determination of the initial warning parameters in response to vehicle startup includes: In response to vehicle startup, an ambient vibration value is acquired and used as the initial vibration value, and / or, in response to vehicle startup, an ambient temperature is acquired and the initial axial displacement is determined based on the ambient temperature.

[0010] Optionally, the target parameters include at least one of axial displacement, temperature difference, vibration value, and temperature gradient, wherein the axial displacement is the axial displacement between the drive shaft flange and the drive shaft flange, the temperature difference is the greater of a first temperature difference and a second temperature difference, the first temperature difference is the temperature difference between the connector and the drive shaft flange, the second temperature difference is the temperature difference between the connector and the drive shaft flange, the connector is used to connect the drive shaft flange and the drive shaft flange, the vibration value is the sum of the vibration values ​​of the drive shaft flange and the drive shaft flange, and the temperature gradient is the maximum temperature gradient of the drive shaft flange within a preset time period; The step of executing a warning action based on the target warning parameters and the target parameters includes: An early warning action is executed based on at least one of the axial displacement, the temperature difference, the temperature gradient, and the vibration value, as well as the target early warning parameter.

[0011] Optionally, the step of performing a warning action based on the target warning parameters and the target parameters includes: The warning level is determined based on the warning parameters and the target parameters; When the warning level is the first warning level, the target parameters are recorded; When the warning level is the second warning level, the indicator light in the vehicle dashboard used to indicate a fault in the vehicle's driveshaft will be changed to a preset color, wherein the warning level of the second warning level is greater than that of the first warning level. When the warning level is the third warning level, the vehicle torque is adjusted to a preset value, wherein the warning level of the third warning level is greater than that of the second warning level.

[0012] Optionally, obtaining the target parameters characterizing the connection between the drive shaft flange and the drive shaft flange includes: The target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange are obtained based on the first sampling frequency. The early warning method for loose vehicle driveshaft connecting flange also includes: In response to the vehicle changing from a driving state to a stationary state, target parameters characterizing the connection between the drive shaft flange and the drive shaft flange are obtained based on a second sampling frequency, wherein the second sampling frequency is less than the first sampling frequency.

[0013] A second aspect of this disclosure provides a warning device for a loose vehicle driveshaft connection flange, the warning device comprising: The first determining module is used to determine the initial warning parameters in response to vehicle startup; The first acquisition module is used to acquire the vehicle's driving parameters and target parameters that characterize the connection between the drive shaft flange and the drive shaft flange during the vehicle's operation. The second determining module is used to determine a target warning parameter based on the driving parameters and the initial warning parameters. The target warning parameter is used to provide a warning about whether the connection between the drive shaft flange and the drive shaft flange is loose. The execution module is used to execute a warning action based on the target warning parameters and the target parameters.

[0014] A third aspect of this disclosure provides a vehicle, comprising: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method of any one of the first aspects.

[0015] The above technical solution allows for the determination of initial warning parameters upon vehicle startup. During vehicle operation, it acquires driving parameters and target parameters characterizing the connection between the driveshaft flange and the driveshaft flange. Based on these parameters, a target warning parameter is determined to detect any looseness in the connection between the driveshaft flange and the driveshaft flange. Furthermore, a warning action is executed based on this target warning parameter. This enables automatic monitoring of the connection between the driveshaft flange and the driveshaft flange during vehicle operation, allowing for timely detection of any looseness and improving driving safety. Moreover, since the target warning parameter can be determined based on the vehicle's driving parameters, it can be adjusted in real-time to provide targeted warnings under different operating conditions. This improves warning accuracy, reduces false triggering of warnings, and ultimately enhances the driving experience for vehicle users.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram illustrating the connection between a vehicle drive shaft and a vehicle drive shaft according to an exemplary embodiment of the present disclosure; Figure 2 This is a flowchart illustrating an exemplary embodiment of the present disclosure of a method for early warning of loose vehicle driveshaft connection flange; Figure 3 This is a block diagram illustrating a warning device for loose vehicle driveshaft connection flange according to an exemplary embodiment of the present disclosure; Figure 4 This is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0018] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0019] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0020] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0021] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0024] Understandably, the vehicle's driveshaft, as a core component of the power transmission system, bears the crucial responsibility of efficiently and smoothly transmitting engine power to the drive wheels. Its operating condition directly affects the vehicle's safety, reliability, and economy. Once the driveshaft fails, transmission efficiency will drop significantly, and abnormal vibrations and noise will occur. If progressive faults such as universal joint wear are not detected in time, they may evolve into catastrophic accidents such as driveshaft breakage, leading to major safety hazards such as chassis perforation and rear wheel lock-up. Even more seriously, such faults often trigger a chain reaction of damage to critical assemblies such as the transmission and differential, with single repair costs potentially reaching tens of thousands of yuan.

[0025] Among the many faults of vehicle driveshafts, loose connection between the driveshaft flange and the drive shaft flange is one of the more typical faults in vehicle transmission systems. The connection structure between the two is as follows: Figure 1 As shown. Currently, the relevant technology mainly relies on manual periodic inspections to detect whether there is any looseness between the drive shaft flange and the drive shaft flange. However, this method has many drawbacks, such as the inability to detect looseness between the drive shaft flange and the drive shaft flange in a timely manner and the slow inspection speed.

[0026] With the rapid development of computer technology, a flange loosening early warning system can be used to accurately identify whether there is looseness between the drive shaft flange and the drive shaft flange. For example, vibration monitoring (using accelerometers to detect abnormal vibration spectra of the flange), visual inspection (using image recognition technology to monitor misalignment of bolt markings or cracks in anti-loosening paint), or torque / preload monitoring (using strain gauges or ultrasonic sensors to measure bolt tightening force attenuation in real time) can be used, combined with machine learning models, to evaluate the connection status between the drive shaft flange and the drive shaft flange, thereby identifying whether the connection between the drive shaft flange and the drive shaft flange is loose.

[0027] However, when identifying whether the connection between the drive shaft flange and the drive shaft flange is loose using this method, it is necessary to train a machine learning model, which results in problems such as complex detection operations and poor detection results.

[0028] In view of this, the present disclosure provides a method, device and vehicle for early warning of loose vehicle drive shaft connection flange, in order to solve the above-mentioned technical problems.

[0029] The embodiments of this disclosure will be further explained below with reference to the accompanying drawings.

[0030] Figure 2 This is a flowchart illustrating an exemplary embodiment of the present disclosure of a method for early warning of loose vehicle driveshaft connection flanges, with reference to... Figure 2 Early warning methods for loose vehicle driveshaft connecting flanges may include: S201: In response to vehicle startup, determine initial warning parameters.

[0031] S202: During vehicle operation, acquire vehicle driving parameters and target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange.

[0032] It is understood that during vehicle operation, driving parameters and target parameters can be acquired in real time, or a sampling frequency can be preset and then the driving parameters and target parameters can be acquired periodically based on the sampling frequency. Of course, other methods are also possible, and this disclosure does not impose any limitations on these methods.

[0033] The driving parameters and target parameters can be determined according to actual conditions, and this disclosure does not impose any limitations on them. For example, driving parameters may include vehicle speed, acceleration, and / or vehicle torque, etc. Target parameters may include axial displacement between the drive shaft flange and the drive shaft flange, vibration value of the drive shaft flange, or vibration value of the drive shaft flange, etc.

[0034] S203: Determine the target warning parameter based on the driving parameters and the initial warning parameters. The target warning parameter is used to provide a warning about whether the connection between the drive shaft flange and the drive shaft flange is loose.

[0035] For example, a calculation formula can be preset between the target warning parameter, the driving parameter, and the initial warning parameter. After obtaining the initial warning parameter and the driving parameter, the initial warning parameter and the driving parameter can be substituted into the preset calculation formula to obtain the target warning parameter.

[0036] For example, a first correspondence between the target warning parameter, the driving parameter, and the initial warning parameter can be preset. Thus, after obtaining the initial warning parameter and the driving parameter, the target warning parameter can be determined based on the initial warning parameter, the driving parameter, and the first correspondence.

[0037] S204: Execute warning actions based on target warning parameters and target parameters.

[0038] For example, the target warning parameter and the target parameter can be compared. If the target parameter is less than the target warning parameter, no warning action is taken. If the target parameter is greater than or equal to the target warning parameter, a warning action is taken.

[0039] The warning action could be a voice reminder that there is a looseness between the drive shaft flange and the drive shaft flange, or it could be illuminating the indicator light on the vehicle's dashboard that indicates a drive shaft malfunction. Of course, the warning action could also be other actions used to alert the user, and this disclosure does not impose any limitations on these actions.

[0040] The above technical solution allows for the determination of initial warning parameters upon vehicle startup. During vehicle operation, it acquires driving parameters and target parameters characterizing the connection between the driveshaft flange and the driveshaft flange. Based on these parameters, a target warning parameter is determined to detect any looseness in the connection between the driveshaft flange and the driveshaft flange. Furthermore, a warning action is executed based on this target warning parameter. This enables automatic monitoring of the connection between the driveshaft flange and the driveshaft flange during vehicle operation, allowing for timely detection of any looseness and improving driving safety. Moreover, since the target warning parameter can be determined based on the vehicle's driving parameters, it can be adjusted in real-time to provide targeted warnings under different operating conditions. This improves warning accuracy, reduces false triggering of warnings, and ultimately enhances the driving experience for vehicle users.

[0041] To facilitate understanding of the early warning method for loose vehicle drive shaft connecting flanges provided in the embodiments of this disclosure, the possible implementation methods of each step in this disclosure are described below.

[0042] In possible embodiments, the initial warning parameters may include initial vibration values ​​and / or initial axial displacement. Accordingly, in step S201, determining the initial warning parameters in response to vehicle startup may include: In response to vehicle startup, acquire ambient vibration values ​​and use these values ​​as initial vibration values, and / or, in response to vehicle startup, acquire ambient temperature and determine initial axial displacement based on the ambient temperature.

[0043] For example, a second correspondence between ambient temperature and initial axial displacement can be preset, so that after obtaining the ambient temperature, the initial axial displacement can be determined according to the ambient temperature and the second correspondence.

[0044] For example, a pre-defined formula can be established to calculate the relationship between ambient temperature and initial axial displacement. After obtaining the ambient temperature, it can be substituted into the pre-defined formula to obtain the initial axial displacement. For instance, the ambient temperature can be substituted into the following formula to obtain the initial axial displacement:

[0045] in, This indicates the initial axial displacement between the drive shaft flange and the drive shaft flange, in units of... , This indicates the ambient temperature, expressed in °C.

[0046] In possible embodiments, the initial warning parameters may include initial vibration values ​​and / or initial axial displacement, and the driving parameters may include vehicle speed and / or vehicle torque. Accordingly, in step S203, determining the target warning parameters based on the driving parameters and the initial warning parameters may include: The target vibration value is determined based on the vehicle speed and initial vibration value, and / or the target axial displacement is determined based on the vehicle torque and initial axial displacement.

[0047] For example, a third correspondence between vehicle speed, initial vibration value, and target vibration value can be preset. Therefore, after obtaining the vehicle speed and initial vibration value, the target vibration value can be determined based on the vehicle speed, initial vibration value, and the third correspondence. Alternatively, a calculation formula between vehicle speed, initial vibration value, and target vibration value can be preset. Therefore, after obtaining the vehicle speed and initial vibration value, the vehicle speed and initial vibration value can be substituted into the preset calculation formula to obtain the target vibration value.

[0048] Similarly, a fourth correspondence between vehicle torque, initial axial displacement, and target axial displacement can be pre-set. Therefore, after obtaining the vehicle torque and initial axial displacement, the target axial displacement can be determined based on the vehicle torque, initial axial displacement, and the fourth correspondence. Alternatively, a calculation formula between vehicle torque, initial axial displacement, and target axial displacement can be pre-set. Therefore, after obtaining the vehicle torque and initial axial displacement, they can be substituted into the pre-set calculation formula to obtain the target axial displacement.

[0049] Determining the target vibration value based on vehicle speed and initial vibration value can be achieved in the following ways: Determine the first product of the first preset value and the vehicle speed, and determine the sum of the first product and the second preset value. Then, determine the product of the sum and the initial vibration value as the target vibration value.

[0050] The first and second preset values ​​can be determined according to actual conditions, and this embodiment does not impose any restrictions on them. For example, the first preset value can be set to 0.005, and the second preset value can be set to 1. Therefore, after obtaining the vehicle speed and initial vibration value, the vehicle speed and initial vibration value can be substituted into the following formula to obtain the target vibration value:

[0051] in, Indicates the target vibration value. Indicates the initial vibration value. Indicates vehicle speed.

[0052] Determining the target axial displacement based on the vehicle torque and initial axial displacement can include, among other possible methods: Determine the absolute difference between the vehicle torque and the vehicle torque threshold, and determine the second product of the absolute difference and the third preset value. The sum of the second product and the initial axial displacement is determined as the target axial displacement.

[0053] The vehicle torque threshold and the third preset value can be determined according to actual conditions, and this embodiment does not impose any restrictions on them. For example, the vehicle torque threshold can be set to the vehicle's rated torque, and the third preset value can be set to 0.02. Therefore, after obtaining the vehicle torque and initial axial displacement, the vehicle torque and initial axial displacement can be substituted into the following formula to obtain the target axial displacement:

[0054] in, Indicates the axial displacement of the target. This represents the initial axial displacement. Indicates vehicle torque. This indicates the vehicle's rated torque.

[0055] The above method allows for real-time adjustment of initial warning parameters based on vehicle driving parameters. Compared to using fixed initial warning parameters, this solution can adapt to complex driving conditions by adjusting warning parameter thresholds in real time. This improves warning accuracy, reduces false triggering of warning actions, and enhances the driving experience for vehicle users.

[0056] In possible embodiments, the target parameters may include at least one of axial displacement, temperature difference, vibration value, and temperature gradient, wherein the axial displacement is the axial displacement between the drive shaft flange and the drive shaft flange, the temperature difference is the greater of a first temperature difference and a second temperature difference, the first temperature difference is the temperature difference between the connecting member and the drive shaft flange, the second temperature difference is the temperature difference between the connecting member and the drive shaft flange, the connecting member is used to connect the drive shaft flange and the drive shaft flange, the vibration value is the sum of the vibration values ​​of the drive shaft flange and the drive shaft flange, and the temperature gradient is the maximum temperature gradient of the drive shaft flange within a preset time period; correspondingly, in step S204, executing a warning action based on the target warning parameters and the target parameters may include: The warning action is executed based on at least one of the following: axial displacement, temperature difference, temperature gradient, and vibration value, as well as the target warning parameter.

[0057] Among them, axial displacement can be obtained by a linear variable differential transformer installed in the vehicle gearbox housing, temperature difference and temperature gradient can be obtained by an infrared thermal imager installed in the drive shaft cover at 45° to the drive shaft bolt area, and vibration value can be obtained by a miniature vibration sensor installed on the surface of the vehicle drive shaft.

[0058] By using the methods described above, the connection between the driveshaft flange and the driveshaft flange can be understood from different dimensions. This allows for a more accurate understanding of the actual connection between the driveshaft flange and the driveshaft flange, thereby reducing false triggering of warning actions and improving the driving experience for vehicle users.

[0059] In possible embodiments, step S204, which involves executing a warning action based on the target warning parameters and the target parameters, may include: Based on the target warning parameters and the target parameters, determine the warning level; if the warning level is the first warning level, record the target parameters; if the warning level is the second warning level, change the indicator light on the vehicle's dashboard that indicates a fault in the vehicle's driveshaft to a preset color, wherein the warning level of the second warning level is greater than that of the first warning level; if the warning level is the third warning level, adjust the vehicle's torque to a preset value, wherein the warning level of the third warning level is greater than that of the second warning level.

[0060] For example, during vehicle operation, target parameters, including axial displacement, temperature difference, temperature gradient, and vibration value, can be collected at a preset frequency. Therefore, for each collection cycle, if the collected axial displacement, temperature difference, temperature gradient, and vibration value satisfy at least one of the following conditions: The axial displacement is greater than the first displacement threshold and the axial displacement is less than or equal to the second displacement threshold; the temperature difference is greater than the first temperature difference threshold and the temperature difference is less than or equal to the second temperature difference threshold; the vibration value is greater than the first vibration threshold and the vibration value is less than or equal to the second vibration threshold; and the temperature gradient is greater than the first temperature gradient threshold and less than or equal to the second temperature gradient threshold.

[0061] The warning level is then set to the first warning level, and the collected axial displacement, temperature difference, temperature gradient, and vibration values ​​are recorded.

[0062] If the collected axial displacement, temperature difference, temperature gradient, and vibration values ​​meet at least one of the following conditions: The axial displacement is greater than the second displacement threshold and the axial displacement is less than or equal to the third displacement threshold; the temperature difference is greater than the second temperature difference threshold and the temperature difference is less than or equal to the third temperature difference threshold; the vibration value is greater than the second vibration threshold and the vibration value is less than or equal to the third vibration threshold; and the temperature gradient is greater than the second temperature gradient threshold and less than or equal to the third temperature gradient threshold.

[0063] The warning level is then set to the second warning level, and the indicator light on the vehicle's dashboard that indicates a fault in the vehicle's driveshaft is changed to a preset color.

[0064] If the collected axial displacement, temperature difference, temperature gradient, and vibration values ​​meet at least one of the following conditions: Axial displacement is greater than the third displacement threshold, temperature is greater than the third temperature difference threshold, vibration is greater than the third vibration threshold, and temperature gradient is greater than the third temperature gradient threshold.

[0065] The warning level is then set to Level 3, and the vehicle torque is adjusted to the preset value.

[0066] The preset color can be yellow, red, or any other color. The preset value can be 70% of the vehicle's rated torque, 70% of the current vehicle torque, or any other value; this embodiment does not impose any limitations on these values.

[0067] By using the above methods, different warning actions can be executed based on different warning levels, thereby enabling targeted warnings based on the connection status between the drive shaft flange and the drive shaft flange, improving the accuracy and effectiveness of the warnings.

[0068] In one possible approach, step S202, obtaining the target parameters characterizing the connection between the drive shaft flange and the drive shaft flange, may include: The target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange are obtained based on the first sampling frequency. Accordingly, the early warning method for loose vehicle driveshaft connecting flanges may also include: In response to the vehicle changing from a driving state to a stationary state, target parameters characterizing the connection between the drive shaft flange and the drive shaft flange are obtained based on a second sampling frequency, wherein the second sampling frequency is less than the first sampling frequency.

[0069] The first sampling frequency and the second sampling frequency are determined according to the actual situation, and this embodiment does not impose any restrictions on them.

[0070] For example, target parameters can be sampled at a sampling frequency of 5Hz during vehicle movement, and then at a sampling frequency of 0.2Hz after the vehicle changes from a moving state to a stationary state. If no warning is triggered within a preset time, sampling of target parameters stops. Alternatively, target parameters can be sampled at a sampling frequency of 5Hz during vehicle movement, and then continue at a sampling frequency of 5Hz after the vehicle changes from a moving state to a stationary state. If no warning is triggered within a preset time, target parameters are sampled at a sampling frequency of 0.2Hz, and a decision on whether to trigger a warning is made based on the sampled target parameters.

[0071] Using the above method, the sampling frequency can be automatically reduced after the vehicle changes from a moving state to a stationary state. This can reduce the power consumption of the whole vehicle and continuously monitor the connection between the drive shaft flange and the drive shaft flange, thereby improving the fault detection rate.

[0072] To facilitate a further understanding of the early warning method for loose vehicle driveshaft connecting flanges provided in this embodiment, a possible implementation of this embodiment will be described below in conjunction with the above steps.

[0073] For example, a linear variable differential transformer for acquiring axial displacement can be pre-installed on the vehicle's gearbox housing; an infrared thermal imager for acquiring maximum temperature difference and temperature gradient can be installed on the driveshaft cover, with the infrared thermal imager's detection area at a 45° angle to the vehicle's driveshaft bolt area; and a vibration sensor for acquiring vibration values ​​can be installed on the surface of the vehicle's driveshaft. Thus, when the vehicle starts, the linear variable differential transformer, infrared thermal imager, and vibration sensor can be initialized (e.g., the linear variable differential transformer undergoes zero-point calibration, the infrared thermal imager's focus is adjusted, and the vibration sensor's bias is compensated), and static environmental parameters (such as ambient temperature) can be collected. and environmental vibration values Establish initial warning parameters (i.e., initial vibration values ​​and / or initial axial displacement):

[0074]

[0075] in, Indicates the initial vibration value. This indicates the initial axial displacement between the drive shaft flange and the drive shaft flange, in units of... , This indicates the ambient temperature, expressed in °C.

[0076] After obtaining the initial warning parameters, if the vehicle changes from a stationary state to a moving state, the axial displacement can be periodically collected using a linear variable differential transformer, an infrared thermal imager, and a vibration sensor. Temperature difference Temperature gradient and vibration value The vehicle speed is obtained through a speed detection device within the vehicle, and the vehicle torque is obtained through the CAN bus. After obtaining the vehicle speed and torque, the initial warning parameters are dynamically adjusted using the following formula to obtain the target warning parameters (i.e., target vibration value and target axial displacement):

[0077]

[0078] in, Indicates the target vibration value. Indicates vehicle speed. Indicates the axial displacement of the target. This represents the initial axial displacement. Indicates vehicle torque. This indicates the vehicle's rated torque.

[0079] After obtaining the target warning parameters, the target parameters can be compared with the target warning parameters to determine the warning level, thereby triggering the vehicle to perform the corresponding warning action.

[0080] For example, when the target parameter meets any of the following conditions and the duration exceeds 10 seconds, the warning level is determined to be the first warning level. In this case, only the target parameter is recorded, and no alarm is triggered: Axial displacement > ; Temperature difference >8℃; Temperature gradient >1℃ / cm; Vibration value > .

[0081] When the target parameter meets any of the following conditions and the duration exceeds 10 seconds, the warning level is determined to be the second warning level, at which time the indicator light on the instrument panel that indicates a fault in the vehicle's driveshaft turns yellow: Axial displacement ; Temperature difference >15℃; Vibration value RMS > ; Temperature gradient >2℃ / cm.

[0082] When the target parameter meets any of the following conditions and the duration exceeds 10 seconds, the warning level is determined to be the third warning level. At this time, the vehicle torque output is limited to 70% of the vehicle's rated torque via the CAN bus: Axial displacement > ; Temperature difference >25℃; Vibration value RMS > ; Temperature gradient >4℃ / cm.

[0083] Once the vehicle transitions from a moving state to a stationary state, continuous monitoring can be performed for 5 minutes to assess the connection status between the driveshaft flange and the drive shaft flange and trigger the corresponding warning mechanism. If no warning is issued or the warning remains unresolved after 5 minutes, the linear variable differential transformer, infrared thermal imager, and vibration sensor will automatically reduce their sampling frequency and enter a low-power state.

[0084] Based on the above scheme, multi-dimensional cross-validation can be achieved using a linear variable differential transformer, infrared thermal imager, and vibration sensor to effectively identify and eliminate environmental interference, significantly reducing the system's false alarm rate. Simultaneously, warning parameters can be adjusted in real time based on vehicle speed, load (i.e., vehicle torque), and ambient temperature to adapt to warnings under complex operating conditions, improving the accuracy and application range of warnings. Furthermore, active torque limiting via the CAN bus can reduce the risk of driveshaft breakage, achieving an upgrade from "passive maintenance" to "intelligent prevention," improving driving safety and reducing maintenance costs. Additionally, automatic frequency reduction sampling can be implemented after the vehicle stops, thereby reducing overall vehicle power consumption and improving fault detection rates.

[0085] Based on the same concept, this disclosure also provides a warning device for a loose vehicle driveshaft connecting flange, such as... Figure 3As shown, the warning device 300 for loose vehicle driveshaft connection flange may include: The first determining module 301 is used to determine the initial warning parameters in response to vehicle startup; The first acquisition module 302 is used to acquire the driving parameters of the vehicle and the target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange during the vehicle's operation. The second determining module 303 is used to determine a target warning parameter based on the driving parameters and the initial warning parameters. The target warning parameter is used to provide a warning about whether the connection between the transmission shaft flange and the drive shaft flange is loose. The execution module 304 is used to execute a warning action based on the target warning parameters and the target parameters.

[0086] The aforementioned vehicle driveshaft flange loosening warning device 300 can determine initial warning parameters upon vehicle startup and acquire vehicle driving parameters and target parameters characterizing the connection between the driveshaft flange and driveshaft flange during vehicle operation. Based on the driving parameters and initial warning parameters, it can determine target warning parameters for detecting looseness in the connection between the driveshaft flange and driveshaft flange, and execute warning actions based on these parameters. Therefore, the connection between the driveshaft flange and driveshaft flange can be automatically monitored during vehicle operation, allowing for timely detection of looseness and improving driving safety. Furthermore, since the target warning parameters can be determined based on the vehicle's driving parameters, they can be adjusted in real-time to provide targeted warnings under different operating conditions. This improves warning accuracy, reduces false triggering of warning actions, and ultimately enhances the driving experience for vehicle users.

[0087] In one possible manner, the initial warning parameters include an initial vibration value and / or an initial axial displacement, and the driving parameters include vehicle speed and / or vehicle torque. Accordingly, the second determining module 303 can be used to: determine a target vibration value based on the vehicle speed and the initial vibration value, and / or, determine a target axial displacement based on the vehicle torque and the initial axial displacement.

[0088] In one possible manner, the second determining module 303 may be used to: determine a first product of a first preset value and the vehicle speed, and determine the sum of the first product and a second preset value, and determine the product of the sum and the initial vibration value as the target vibration value.

[0089] In one possible manner, the second determining module 303 may be used to: determine the absolute difference between the vehicle torque and the vehicle torque threshold, and determine the second product of the absolute difference and a third preset value, and determine the sum of the second product and the initial axial displacement as the target axial displacement.

[0090] In one possible manner, the initial warning parameters include an initial vibration value and / or an initial axial displacement. Accordingly, the first determining module 301 may be used to: in response to vehicle startup, acquire an environmental vibration value and use the environmental vibration value as the initial vibration value, and / or, in response to vehicle startup, acquire an ambient temperature and determine the initial axial displacement based on the ambient temperature.

[0091] In a possible manner, the target parameter includes at least one of axial displacement, temperature difference, vibration value, and temperature gradient, wherein the axial displacement is the axial displacement between the drive shaft flange and the drive shaft flange, the temperature difference is the greater of a first temperature difference and a second temperature difference, the first temperature difference being the temperature difference between the connector and the drive shaft flange, the second temperature difference being the temperature difference between the connector and the drive shaft flange, the connector being used to connect the drive shaft flange and the drive shaft flange, the vibration value being the sum of the vibration values ​​of the drive shaft flange and the drive shaft flange, and the temperature gradient being the maximum temperature gradient of the drive shaft flange within a preset time period; accordingly, the execution module 304 can be used to: execute a warning action based on at least one of the axial displacement, the temperature difference, the temperature gradient, and the vibration value, as well as the target warning parameter.

[0092] In one possible manner, execution module 304 may include: The first determining unit is used to determine the warning level based on the warning parameters and the target parameters; The first execution unit is used to record the target parameters when the warning level is the first warning level; The second execution unit is used to change the indicator light in the vehicle dashboard that indicates a fault in the vehicle drive shaft to a preset color when the warning level is the second warning level, wherein the warning level of the second warning level is greater than that of the first warning level. The third execution unit is used to adjust the vehicle torque to a preset value when the warning level is the third warning level, wherein the warning level of the third warning level is greater than that of the second warning level.

[0093] In one possible manner, the first acquisition module 302 may be used to: acquire target parameters characterizing the connection between the drive shaft flange and the drive shaft flange based on a first sampling frequency; Accordingly, the warning device 300 for loose vehicle driveshaft connecting flange may also include: The second acquisition module is used to acquire target parameters characterizing the connection between the drive shaft flange and the drive shaft flange based on a second sampling frequency in response to the vehicle changing from a driving state to a stationary state, wherein the second sampling frequency is less than the first sampling frequency.

[0094] Regarding the warning device 300 for loose vehicle drive shaft connecting flange in the above embodiments, the specific operation of each module has been described in detail in the embodiments of the relevant method, and will not be elaborated here.

[0095] Based on the same concept, embodiments of this disclosure also provide a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described warning method for loose vehicle driveshaft connecting flange.

[0096] Based on the same concept, this disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method for warning of loose vehicle drive shaft connecting flange.

[0097] Based on the same concept, this disclosure also provides a controller, which includes: processor; Memory used to store processor-executable instructions; The processor is configured to execute the steps of the aforementioned warning method for loose vehicle driveshaft connection flange.

[0098] Based on the same concept, this disclosure also provides a vehicle, including the controller described above or including a memory storing a computer program thereon; a processor for executing the computer program in the memory to implement the steps of the above-described method for warning of loose vehicle drive shaft connection flange.

[0099] Figure 4 This is a block diagram illustrating a vehicle according to an exemplary embodiment of the present disclosure. For example, vehicle 400 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicle. Vehicle 400 may be an autonomous vehicle or a semi-autonomous vehicle.

[0100] Reference Figure 4The vehicle 400 may include various subsystems, such as an infotainment system 410, a perception system 420, a decision control system 430, a drive system 440, and a computing platform 450. The vehicle 400 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and component of the vehicle 400 can be interconnected via wired or wireless means.

[0101] In some embodiments, the infotainment system 410 may include a communication system, an entertainment system, and a navigation system, etc.

[0102] The perception system 420 may include several sensors for sensing information about the environment surrounding the vehicle 400. For example, the perception system 420 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0103] The decision control system 430 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0104] The drive system 440 may include components that provide powered motion to the vehicle 400. In one embodiment, the drive system 440 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0105] Some or all of the functions of the vehicle 400 are controlled by a computing platform 450. The computing platform 450 may include at least one processor 451 and a memory 452, the processor 451 being able to execute instructions 453 stored in the memory 452.

[0106] Processor 451 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0107] The memory 452 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0108] In addition to instruction 453, memory 452 can also store data, such as vehicle status information, engine coolant temperature, intake air temperature, preset heating temperature, and preset cooling temperature. The data stored in memory 452 can be used by computing platform 450.

[0109] In this embodiment of the disclosure, the processor 451 may execute instruction 453 to complete all or part of the steps of the above-described vehicle speed control method.

[0110] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the vehicle speed control method described above. For example, the computer-readable storage medium may be the memory 452 including the program instructions, which may be executed by the processor 451 of the vehicle 400 to complete the vehicle speed control method described above.

[0111] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the above-described vehicle speed control method when executed by the programmable device.

[0112] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0113] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0114] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method for early warning of loose vehicle driveshaft connecting flange, characterized in that, The early warning method for loose vehicle driveshaft connecting flange includes: In response to vehicle startup, determine initial warning parameters; During vehicle operation, the vehicle's driving parameters and target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange are acquired. Based on the driving parameters and the initial warning parameters, a target warning parameter is determined. The target warning parameter is used to provide a warning about whether the connection between the drive shaft flange and the drive shaft flange is loose. Execute a warning action based on the target warning parameters and the target parameters.

2. The early warning method for loose vehicle driveshaft connecting flange according to claim 1, characterized in that, The initial warning parameters include initial vibration values ​​and / or initial axial displacement, and the driving parameters include vehicle speed and / or vehicle torque. Determining the target warning parameters based on the driving parameters and the initial warning parameters includes: The target vibration value is determined based on the vehicle speed and the initial vibration value, and / or the target axial displacement is determined based on the vehicle torque and the initial axial displacement.

3. The early warning method for loose vehicle driveshaft connecting flange according to claim 2, characterized in that, Determining the target vibration value based on the vehicle speed and the initial vibration value includes: A first product of a first preset value and the vehicle speed is determined, and the sum of the first product and a second preset value is determined. The product of the sum and the initial vibration value is then determined as the target vibration value.

4. The early warning method for loose vehicle driveshaft connecting flange according to claim 2, characterized in that, Determining the target axial displacement based on the vehicle torque and the initial axial displacement includes: The absolute difference between the vehicle torque and the vehicle torque threshold is determined, and the second product of the absolute difference and the third preset value is determined. The sum of the second product and the initial axial displacement is determined as the target axial displacement.

5. The early warning method for loose vehicle driveshaft connecting flange according to claim 1, characterized in that, The initial warning parameters include initial vibration values ​​and / or initial axial displacement. The process of determining the initial warning parameters in response to vehicle startup includes: In response to vehicle startup, an ambient vibration value is acquired and used as the initial vibration value, and / or, in response to vehicle startup, an ambient temperature is acquired and the initial axial displacement is determined based on the ambient temperature.

6. The early warning method for loose vehicle driveshaft connecting flange according to any one of claims 1-5, characterized in that, The target parameters include at least one of axial displacement, temperature difference, vibration value, and temperature gradient. The axial displacement is the axial displacement between the drive shaft flange and the drive shaft flange. The temperature difference is the greater of a first temperature difference and a second temperature difference. The first temperature difference is the temperature difference between the connector and the drive shaft flange, and the second temperature difference is the temperature difference between the connector and the drive shaft flange. The connector is used to connect the drive shaft flange and the drive shaft flange. The vibration value is the sum of the vibration values ​​of the drive shaft flange and the drive shaft flange. The temperature gradient is the maximum temperature gradient of the drive shaft flange within a preset time period. The step of executing a warning action based on the target warning parameters and the target parameters includes: An early warning action is executed based on at least one of the axial displacement, the temperature difference, the temperature gradient, and the vibration value, as well as the target early warning parameter.

7. The early warning method for loose vehicle driveshaft connecting flange according to any one of claims 1-5, characterized in that, The step of executing a warning action based on the target warning parameters and the target parameters includes: The warning level is determined based on the target warning parameters and the target parameters; When the warning level is the first warning level, the target parameters are recorded; When the warning level is the second warning level, the indicator light in the vehicle dashboard used to indicate a fault in the vehicle's driveshaft will be changed to a preset color, wherein the warning level of the second warning level is greater than that of the first warning level. When the warning level is the third warning level, the vehicle torque is adjusted to a preset value, wherein the warning level of the third warning level is greater than that of the second warning level.

8. The early warning method for loose vehicle driveshaft connecting flange according to any one of claims 1-5, characterized in that, The acquisition of target parameters characterizing the connection between the drive shaft flange and the drive shaft flange includes: The target parameters used to characterize the connection between the drive shaft flange and the drive shaft flange are obtained based on the first sampling frequency. The early warning method for loose vehicle driveshaft connecting flange also includes: In response to the vehicle changing from a driving state to a stationary state, target parameters characterizing the connection between the drive shaft flange and the drive shaft flange are obtained based on a second sampling frequency, wherein the second sampling frequency is less than the first sampling frequency.

9. A warning device for loose vehicle driveshaft connecting flange, characterized in that, The warning device for loose vehicle driveshaft connecting flange includes: The first determining module is used to determine the initial warning parameters in response to vehicle startup; The first acquisition module is used to acquire the vehicle's driving parameters and target parameters that characterize the connection between the drive shaft flange and the drive shaft flange during the vehicle's operation. The second determining module is used to determine a target warning parameter based on the driving parameters and the initial warning parameters. The target warning parameter is used to provide a warning about whether the connection between the drive shaft flange and the drive shaft flange is loose. The execution module is used to execute a warning action based on the target warning parameters and the target parameters.

10. A vehicle, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the method of any one of claims 1 to 8.

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