Automobile shock absorber damping failure monitoring system and method

Abstract

The present application discloses a system and method for monitoring damping failure of automobile shock absorbers. The automobile shock absorber damping failure monitoring system comprises: a signal detection device, which is arranged on the driving chassis of the automobile, and is used to detect the vibration signal of the automobile in real time during driving, and the driving chassis of the automobile includes a shock absorber; a signal processing module, which is used to obtain the vibration signal detected by the signal detection device, and generate prompt information of whether the shock absorber has damping failure according to the vibration signal, and send the prompt information to the central control system; the central control system is used to control the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information, and the output signal is used to indicate whether the shock absorber has damping failure. According to the embodiment of the present application, the monitoring of damping failure of the shock absorber can be realized without human perception, which can improve the accuracy and efficiency of the monitoring of shock absorber failure.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and in particular, relates to a system and method for monitoring damping failure of an automobile shock absorber. Background Art

[0002] The suspension system has an important impact on the handling stability, driving safety and comfort of the vehicle. For the shock absorber, an important part of the suspension, the failure of the shock absorber is often caused by fatigue wear, oil leakage, aging or damage of the shock absorber. If the shock absorber fails, the vibration during the operation of the vehicle cannot be effectively attenuated, which will cause a significant decline in the performance of the vehicle, such as affecting the ride comfort, handling stability and full play of the power performance of the vehicle.

[0003] Therefore, it is necessary to monitor the failure of shock absorbers to achieve timely diagnosis of vehicle faults and ensure the performance of the whole vehicle. However, the current method of monitoring the failure of shock absorbers through human observation cannot accurately monitor the failure of shock absorbers for unmanned vehicles because they cannot correctly perceive. Summary of the invention

[0004] The embodiments of the present application provide a system and method for monitoring damping failure of an automobile shock absorber, which can improve the accuracy and efficiency of monitoring shock absorber failure.

[0005] In a first aspect, an embodiment of the present application provides a vehicle shock absorber damping failure monitoring system, comprising: a signal detection device, a signal processing module and a central control system;

[0006] The signal detection device is arranged on the driving chassis of the automobile and is used to detect the vibration signal of the automobile in real time during driving. The driving chassis of the automobile includes a shock absorber;

[0007] The signal processing module is used to obtain the vibration signal detected by the signal detection device, generate prompt information of whether the shock absorber has damping failure according to the vibration signal, and send the prompt information to the central control system;

[0008] The central control system is used to control the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information, and the output signal is used to indicate whether the shock absorber is in a state of damping failure.

[0009] In a second aspect, an embodiment of the present application provides a method for monitoring damping failure of a vehicle shock absorber, comprising:

[0010] The vibration signal of the vehicle in driving is detected in real time by a signal detection device, wherein the signal detection device is arranged on the driving chassis of the vehicle, and the driving chassis of the vehicle includes a shock absorber;

[0011] Acquire the vibration signal detected by the signal detection device through the signal processing module, and generate prompt information of whether the shock absorber has damping failure according to the vibration signal;

[0012] The central control system controls the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information, and the output signal is used to indicate whether the shock absorber is in a state of damping failure.

[0013] The automobile shock absorber damping failure monitoring system and method of the embodiment of the present application detects the vibration signal of the automobile in real time during driving by means of a signal detection device arranged on the driving chassis of the automobile, and then obtains and processes the vibration signal by means of a signal processing module to generate prompt information on whether the shock absorber has damping failure. In this way, after the prompt information is sent to the central control system, the central control system can control the vehicle-mounted system to generate an output signal corresponding to the prompt information and which can be used to indicate whether the shock absorber has damping failure, thereby realizing the damping failure monitoring of the shock absorber. Since there is no need for human perception, the accuracy and efficiency of the shock absorber failure monitoring can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 It is a structural schematic diagram of a vehicle shock absorber damping failure monitoring system provided in an embodiment of the present application;

[0016] Figure 2 It is a flow chart of a method for monitoring damping failure of an automobile shock absorber provided in an embodiment of the present application;

[0017] Figure 3 It is a flowchart of a method for generating prompt information of whether a shock absorber has damping failure according to a vibration signal provided by an embodiment of the present application;

[0018] Figure 4 is a flow chart of a method for determining a preset frequency range provided in an embodiment of the present application;

[0019] Figure 5 is a schematic diagram of a simulation model of automobile vibration provided in an embodiment of the present application;

[0020] Figure 6 is a schematic diagram of first vibration data and second vibration data provided by an embodiment of the present application;

[0021] Figure 7 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0024] With the rapid development of new energy vehicle industry and intelligent driving technology, the practical trend of autonomous driving vehicles is rapidly emerging. Intelligent driving vehicles can achieve long-term unmanned operation. In order to better understand the operating status of the vehicle, it is necessary to diagnose vehicle faults in a timely manner to ensure the driving safety of intelligent driving vehicles.

[0025] The suspension system has an important impact on the vehicle's handling stability, driving safety and comfort. For the shock absorber, an important part of the suspension, the failure of the shock absorber is often caused by fatigue wear, oil leakage, aging or damage of the parts. For example, the clearance between the piston and the cylinder is too large, the cylinder is strained, the oil seal gasket and the sealing gasket are broken and damaged, the valve seal is poor, the shock absorber spring is too soft or broken, and the oil storage cylinder head nut is loose. The above faults will cause the damping of the shock absorber to decrease or even fail, so that the vibration of the car cannot be effectively attenuated during operation, which will cause a significant decrease in the performance of the whole vehicle, such as affecting the car's ride comfort, handling stability and full play of power performance.

[0026] Therefore, it is necessary to monitor the failure of shock absorbers to achieve timely diagnosis of vehicle faults and ensure the performance of the whole vehicle. However, the current method of monitoring the failure of shock absorbers through manual observation, such as observing whether the shock absorber housing is leaking oil or feeling the shock absorber temperature after driving on bumpy roads, is highly subjective and empirical, and is prone to misjudgment. In addition, for unmanned vehicles, the failure of shock absorbers cannot be accurately monitored due to the inability to correctly perceive, which greatly affects driving safety.

[0027] In order to solve the problems of the related art, the embodiments of the present application provide a system and method for monitoring damping failure of an automobile shock absorber.

[0028] It should be noted that the automobile shock absorber damping failure monitoring system in the embodiment of the present application can be used for real-time monitoring or regular troubleshooting. That is to say, the automobile shock absorber damping failure monitoring system can be directly installed on the vehicle, so that the vibration data can be collected and processed in real time during the operation of the intelligent electric chassis through the monitoring system, and whether the shock absorber is abnormal can be determined based on the processing results. Alternatively, the automobile shock absorber damping failure monitoring system may not be installed on the vehicle, but only installed when the intelligent driving chassis performs regular fault detection, so as to perform data collection and troubleshooting through the monitoring system. In this way, the automobile shock absorber damping failure monitoring system based on this embodiment can facilitate users to determine the state of the shock absorber of the intelligent driving electric chassis remotely or during maintenance, and has the advantages of good real-time performance, strong systematicity, and high accuracy, thereby avoiding accidents and ensuring the performance of the entire vehicle.

[0029] The automobile shock absorber damping failure monitoring system provided by the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0030] refer to Figure 1 , is a schematic diagram of the structure of a vehicle shock absorber damping failure monitoring system 100 according to an embodiment of the present application. Figure 1 As shown, the automobile shock absorber damping failure monitoring system 100 includes: a signal detection device 110 , a signal processing module 120 and a central control system 130 .

[0031] Among them, the signal detection device 110 is arranged on the driving chassis of the automobile, and is used to detect the vibration signal of the automobile in real time during driving, and the driving chassis of the automobile includes a shock absorber; the signal processing module 120 is used to obtain the vibration signal detected by the signal detection device, and generate prompt information on whether the shock absorber has failed damping according to the vibration signal, and send the prompt information to the central control system; the central control system 130 is used to control the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information, and the output signal is used to indicate whether the shock absorber has failed damping.

[0032] Optional, such as Figure 1As shown, the automobile shock absorber damping failure monitoring system further includes a CAN transceiver 140, and the CAN transceiver 140 and the central control system 130 are both connected to the CAN bus 150. Specifically, the CAN transceiver 140 is used to send the prompt information to the central control system 130 through the signal processing module 120.

[0033] Thus, the vibration signal of the car during driving is detected in real time by a signal detection device arranged on the driving chassis of the car, and then the vibration signal is acquired and processed by the signal processing module to generate prompt information on whether the shock absorber has failed in damping. In this way, after the prompt information is sent to the central control system, the central control system can control the vehicle-mounted system to generate an output signal corresponding to the prompt information and which can be used to indicate whether the shock absorber has failed in damping, thereby realizing the monitoring of shock absorber damping failure. Since there is no need for human perception, the accuracy and efficiency of shock absorber failure monitoring can be improved.

[0034] As an optional embodiment, the signal detection device can be specifically arranged on the vehicle bearing frame on the driving chassis of the vehicle close to the shock absorber. It should be understood that since there are multiple shock absorbers of the vehicle, the number of signal detection devices is at least one, that is, a corresponding signal detection device can be set only for at least one of the multiple shock absorbers, or a corresponding signal detection device can be set for each shock absorber, which is not limited in this embodiment. In this way, it can adapt to the intelligent electric chassis and determine whether the suspension shock absorber has failed based on the detection signal of the signal detection device.

[0035] In some embodiments, the vibration signal includes but is not limited to: dynamic parameters such as vibration acceleration signal, displacement signal, speed signal, etc. in the vertical direction of the vehicle during driving. Then, the signal detection device can be an acceleration sensor, a displacement sensor, a speed sensor, etc.

[0036] Specifically, for the acceleration sensor, its sensitivity is determined according to the mapping relationship between the detection signal of the acceleration sensor and the acceleration information. That is to say, by setting the corresponding sensitivity of the acceleration sensor, the detected electrical signal can be matched with the actual physical quantity.

[0037] In addition, in some embodiments, the signal processing module can also be used to store the detection signal (ie, vibration signal) obtained by the signal detection device, so as to further call the stored signal for corresponding processing.

[0038] In some embodiments, the vibration signal is a time domain signal. Then, the signal processing module is specifically used to: convert the time domain signal into a frequency domain signal; extract the target signal within a preset frequency range in the frequency domain signal; determine whether the shock absorber has a damping failure according to the attribute characteristics of the target signal, and generate prompt information on whether the shock absorber has a damping failure, wherein the attribute characteristics include the vibration amplitude. Optionally, the time domain signal can be converted into a frequency domain signal using a fast Fourier transform algorithm.

[0039] In some embodiments, the signal processing module is further specifically used to: determine the vibration amplitude of the target signal at a preset frequency according to the target signal; when the vibration amplitude is greater than or equal to a preset threshold, determine that the shock absorber damping has failed; when the vibration amplitude is less than the preset threshold, determine that the shock absorber damping has not failed.

[0040] In addition, in some embodiments, the automobile shock absorber damping failure monitoring system 100 further includes a simulation module ( Figure 1 ), which is used to: input a preset damping coefficient of a shock absorber and information on the roughness of a road surface on which the vehicle is traveling into a pre-built simulation model of vehicle vibration; run the simulation model to obtain first vibration data of the simulation model; adjust the damping coefficient of the shock absorber to obtain an updated simulation model; run the updated simulation model to obtain second vibration data of the updated simulation model; and determine a preset frequency range according to attribute characteristics of the first vibration data and attribute characteristics of the second vibration data.

[0041] Specifically, the simulation model is a multi-degree-of-freedom equivalent model of the entire vehicle. The simulation model of automobile vibration at least includes: the entire vehicle body, the automobile suspension system and the wheels, and the automobile suspension system includes springs and shock absorbers arranged in parallel.

[0042] In some optional embodiments, the output signal corresponding to the prompt information of the shock absorber damping failure is the first output signal, and the output signal corresponding to the prompt information of the shock absorber damping not failing is the second output signal. Then, the central control system is specifically used to: when the prompt information is the prompt information of the shock absorber damping failure, control the vehicle-mounted system to generate the first output signal, the first output signal is used to indicate the state of the shock absorber damping failure; when the prompt information is the prompt information of the shock absorber damping not failing, control the vehicle-mounted system to generate the second output signal, the second output signal is used to indicate the state of the shock absorber damping not failing.

[0043] Optionally, the central control system can also be used to obtain vibration signals from the signal processing module and transmit the vibration signals to the cloud platform. In this way, by uploading to the cloud for storage, the amount of data transmission and data storage space can be greatly reduced, making it easier to implement in the intelligent driving chassis.

[0044] It should be noted that, for the convenience of description, the above device or system is described as various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0045] Based on the same technical concept, corresponding to any of the above-mentioned embodiments, the present application also provides a method for monitoring the damping failure of a vehicle shock absorber. It can be understood that the method for monitoring the damping failure of a vehicle shock absorber is applied to the system for monitoring the damping failure of a vehicle shock absorber in any of the above-mentioned embodiments.

[0046] Figure 2 The flowchart of the automobile shock absorber damping failure monitoring method according to the embodiment of the present application is shown. Figure 2 As shown, the automobile shock absorber damping failure monitoring method may specifically include the following steps:

[0047] S201, detecting a vibration signal of a vehicle in real time by a signal detection device, wherein the signal detection device is disposed on a driving chassis of the vehicle, and the driving chassis of the vehicle includes a shock absorber;

[0048] S202, obtaining a vibration signal detected by a signal detection device through a signal processing module, and generating prompt information of whether the shock absorber has a damping failure according to the vibration signal;

[0049] S203, controlling the vehicle-mounted system to generate an output signal corresponding to the prompt information through the central control system according to the prompt information, where the output signal is used to indicate whether the shock absorber is in a state of damping failure.

[0050] Thus, the vibration signal of the car during driving is detected in real time by a signal detection device arranged on the driving chassis of the car, and then the vibration signal is acquired and processed by the signal processing module to generate prompt information on whether the shock absorber has failed in damping. In this way, after the prompt information is sent to the central control system, the central control system can control the vehicle-mounted system to generate an output signal corresponding to the prompt information and which can be used to indicate whether the shock absorber has failed in damping, thereby realizing the monitoring of shock absorber damping failure. Since there is no need for human perception, the accuracy and efficiency of shock absorber failure monitoring can be improved.

[0051] The specific implementation methods of the above steps are introduced below.

[0052] In some embodiments, in S201, the vibration signal includes but is not limited to: dynamic parameters such as vibration acceleration signal, displacement signal, velocity signal, etc. in the vertical direction of the vehicle during driving. It can be understood that the vibration signal detected in real time by the signal detection device is a time domain signal, that is, a signal expressed in the time domain, which can be expressed as a series of values ​​at time points. The time domain signal can be continuous or discrete.

[0053] In some embodiments, to meet the test requirements, the sampling frequency of the signal detection device is set to fs = 100 Hz, which means that an equally spaced periodic unit pulse sequence is established, which can be expressed as a comb function :

[0054] (1)

[0055] Where, Ts=1 / f s , n is an integer, The function is a unit pulse function:

[0056] (2)

[0057] The detected vibration signal is defined as x(t), and the adopted signal is:

[0058] (3)

[0059] in,

[0060] (4)

[0061] Furthermore, S202 can be Figure 3 The method shown is implemented. Figure 3 As shown, the method provided in this embodiment for generating prompt information of whether a shock absorber has damping failure according to a vibration signal may specifically include the following steps: S301 to S303.

[0062] S301, converting a time domain signal into a frequency domain signal.

[0063] In some embodiments, since the vibration signal detected in real time by the signal detection device is a time domain signal, in the time domain, the characteristics of the signal, such as amplitude, frequency, phase, etc., can be analyzed by observing the values ​​of the signal at different time points. Specifically, the time domain method can be used to filter, enhance, compress, etc. the signal.

[0064] In another embodiment, in order to facilitate the analysis of the frequency components of the signal, the time domain signal can be converted into a frequency domain signal, that is, S301 is executed. Specifically, the frequency domain signal is the representation of the signal in the frequency domain, and the time domain signal and the frequency domain signal can be converted through Fourier transform (FFT). In this way, based on the frequency domain signal obtained by the conversion, the signal can be represented as a series of frequency components in the frequency domain, and each frequency component corresponds to a sinusoidal wave component of a different frequency in the signal. Therefore, the frequency characteristics of the signal, such as frequency distribution, bandwidth, frequency peak, etc., can be determined by analyzing the frequency domain signal.

[0065] In specific implementation, the Hanning window function w(t) can be used, and the signal is:

[0066] (5)

[0067] Furthermore, according to the Fourier transform properties, the signal The spectrum is and Convolution: , therefore, according to the Fourier transform formula, the frequency domain signal can be obtained:

[0068] (6)

[0069] S302: Extract a target signal within a preset frequency range from the frequency domain signal.

[0070] As an optional embodiment, for a preset frequency range, the Figure 4 The method shown is implemented. Figure 4 As shown, this embodiment provides a method for determining a preset frequency range, which is described below. Figure 4 The various steps and their specific implementation methods.

[0071] In S401, the preset damping coefficient of the shock absorber and the roughness information of the road surface on which the car is traveling are input into a pre-constructed simulation model of car vibration; in S402, the simulation model is run to obtain first vibration data of the simulation model; in S403, the damping coefficient of the shock absorber is adjusted to obtain an updated simulation model; in S404, the updated simulation model is run to obtain second vibration data of the updated simulation model; in S405, a preset frequency range is determined based on the attribute characteristics of the first vibration data and the attribute characteristics of the second vibration data.

[0072] In some embodiments, the simulation model of automobile vibration includes: a single degree of freedom model, a two degree of freedom model and a multi-degree of freedom model (e.g., a seven degree of freedom model). It should be noted that the greater the degree of freedom of the simulation model, the more design parameters need to be input. Optionally, before running the simulation model, in addition to inputting the shock absorber damping coefficient into the simulation model, design parameters such as wheel mass, vehicle body mass, spring stiffness, and wheel stiffness may also be input.

[0073] refer to Figure 5 The embodiment of the present application is described by taking a multi-degree-of-freedom (seven-degree-of-freedom) vehicle equivalent model as an example. Figure 5As shown in the simulation model of automobile vibration, the uneven road excitation 510 is used to represent the unevenness information of the road surface on which the automobile is traveling. The simulation model of automobile vibration at least includes: a vehicle body 520, a vehicle suspension system 530 and a wheel 540. Among them, the vehicle suspension system 530 is arranged between the vehicle body 520 and the wheel 540, and is used to transmit the force and torque between the vehicle body 520 and the wheel 540, and at the same time plays the role of buffering and shock absorption, and can be used to represent the equivalent stiffness and damping of the shock absorber.

[0074] That is to say, for the whole vehicle model obtained by simplifying the intelligent driving chassis, the chassis body mass can be regarded as a three-dimensional model of a rigid body. The sprung load (body) of the car is composed of the body, frame and its assemblies and parts, which are connected to the axle and wheel through the shock absorber and suspension spring. The unsprung (wheel) mass composed of the wheel and axle is supported on the uneven road surface by tires with a certain elasticity.

[0075] More specifically, the automobile suspension system 530 includes a spring and a shock absorber arranged in parallel, the spring is used to represent the buffering effect of the suspension, and the shock absorber is used to represent the vibration reduction effect of the suspension. In addition, it should be understood that since the stiffness and weight of the wheel 540 cannot be ignored, the wheel 540 can be equivalent to a spring with its own weight (i.e. Figure 5 mid wheel stiffness 541 and unsprung mass 542).

[0076] Furthermore, Figure 6 A schematic diagram of the first vibration data and the second vibration data is shown. In addition, the damping coefficient of the shock absorber corresponding to the simulation model is normal damping, and the damping coefficient of the adjusted shock absorber corresponding to the updated simulation model is abnormal damping. Figure 6 As shown, within the frequency range of 0-20Hz, there is a large difference between the resonant frequency peak of the first vibration data and the resonant frequency peak of the second vibration data. That is to say, when the shock absorber fails, such as leakage, its damping parameter changes, which causes a large change in the corresponding vibration peak value, while the corresponding frequency remains basically unchanged. Therefore, it can be determined that the damping performance of the automobile shock absorber affects the vibration suppression effect of the automobile, and abnormal damping causes the vibration of the automobile to be unable to be effectively attenuated and effectively suppressed during operation. In addition, based on the first vibration data and the second vibration data, 0-20Hz can be determined as the preset frequency range.

[0077] Thus, through the above steps S401 to S405, the preset frequency range can be determined, so as to extract the target signal based on the preset frequency range. Figure 3 A method for generating prompt information of whether a shock absorber has damping failure according to a vibration signal.

[0078] S303: judging whether the shock absorber has failed damping according to the attribute characteristics of the target signal, and generating prompt information of whether the shock absorber has failed damping. The attribute characteristics of the target signal include, but are not limited to: frequency distribution, bandwidth, vibration amplitude corresponding to frequency, etc.

[0079] In specific implementation, the vibration amplitude at a preset frequency of the target signal, such as the vibration amplitude at the resonant frequency, can be determined based on the target signal; when the vibration amplitude is greater than or equal to a preset threshold, it is determined that the shock absorber damping has failed; when the vibration amplitude is less than the preset threshold, it is determined that the shock absorber damping has not failed.

[0080] In this way, by identifying the resonance peak dominated by the shock absorber, it is determined whether the shock absorber has failed in damping by judging the relative size of the resonance peak value and the preset threshold. Thus, a prompt message of whether the shock absorber has failed in damping is generated. Then, return to Figure 2 The automobile shock absorber damping failure monitoring method is implemented, and S203 is executed.

[0081] In some embodiments, in S203, the output signal corresponding to the prompt information of the shock absorber damping failure is the first output signal, and the output signal corresponding to the prompt information of the shock absorber damping not failing is the second output signal. Then, in the case where the prompt information is the prompt information of the shock absorber damping failure, the central control system controls the vehicle-mounted system to generate the first output signal, and the first output signal is used to indicate the state of the shock absorber damping failure; in the case where the prompt information is the prompt information of the shock absorber damping not failing, the central control system controls the vehicle-mounted system to generate the second output signal, and the second output signal is used to indicate the state of the shock absorber damping not failing.

[0082] Optionally, the output signal may include display information or voice prompt information, etc. Taking the prompt information to ensure that the shock absorber damping fails as an example, based on the control of the central control system, the vehicle system may display the shock absorber failure state, or generate an alarm for shock absorber failure.

[0083] In addition, in some embodiments, after the vibration signal detected by the signal detection device is obtained by the signal processing module, the vibration signal can also be obtained from the signal processing module by the central control system, and the vibration signal can be transmitted to the cloud platform. In this way, by uploading to the cloud for storage, the amount of data transmission and data storage space can be greatly reduced, which is easier to implement in the intelligent driving chassis.

[0084] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0085] The method of the above embodiment is applied to the corresponding automobile shock absorber damping failure monitoring system in any of the above embodiments, and has the beneficial effects of the corresponding system embodiment, which will not be described in detail here.

[0086] Based on the same technical concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides an electronic device.

[0087] Figure 7 A more specific schematic diagram of the hardware structure of an electronic device provided by this embodiment is shown.

[0088] The electronic device 700 may include a processor 701 and a memory 702 storing computer program instructions.

[0089] Specifically, the processor 701 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0090] The memory 702 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 702 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 702 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 702 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 702 is a non-volatile solid-state memory.

[0091] In certain embodiments, the memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present application.

[0092] The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement any one of the vehicle shock absorber damping failure monitoring methods in the above embodiments.

[0093] In some examples, the electronic device 700 may further include a communication interface 703 and a bus 710. Figure 7 As shown, the processor 701, the memory 702, and the communication interface 703 are connected via a bus 710 and communicate with each other.

[0094] The communication interface 703 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0095] Bus 710 includes hardware, software or both, and couples the components of online data traffic billing equipment to each other. For example, but not limitation, bus 710 may include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front-side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnect (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. Where appropriate, bus 710 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0096] Exemplarily, the electronic device 700 may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA).

[0097] Based on the same technical concept, corresponding to any of the above-mentioned embodiments, the present application also provides a non-transitory computer-readable storage medium. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any of the above-mentioned automobile shock absorber damping failure monitoring methods is implemented. Examples of computer-readable storage media include non-transitory computer-readable storage media, such as portable disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, etc.

[0098] Based on the same technical concept, corresponding to any of the above-mentioned embodiments, the present application also provides a computer program product, which includes computer program instructions. In some embodiments, the computer program instructions can be executed by one or more processors of a computer so that the computer and / or the processor execute the automobile shock absorber damping failure monitoring method. Corresponding to the execution subject corresponding to each step in each embodiment of the automobile shock absorber damping failure monitoring method, the processor that executes the corresponding step can belong to the corresponding execution subject.

[0099] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0100] The functional blocks shown in the above structural block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0101] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0102] The above describes various aspects of the present application with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0103] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A vehicle shock absorber damping failure monitoring system, characterized in that: include: Signal detection device, signal processing module and central control system; The signal detection device is arranged on the driving chassis of the automobile, and is used to detect the vibration signal of the automobile in real time when the automobile is driving. The driving chassis of the automobile includes a shock absorber, and the vibration signal includes a vibration acceleration signal in the vertical direction when the automobile is driving; The signal processing module is used to obtain the vibration signal detected by the signal detection device, generate prompt information of whether the shock absorber has damping failure according to the vibration signal, and send the prompt information to the central control system; The central control system is used to control the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information, and the output signal is used to indicate whether the shock absorber is in a state of damping failure; The vibration signal is a time domain signal; The signal processing module is used to convert the time domain signal into a frequency domain signal; extract a target signal within a preset frequency range from the frequency domain signal; determine whether the shock absorber has a damping failure based on the attribute characteristics of the target signal, and generate prompt information on whether the shock absorber has a damping failure.

2. The system according to claim 1, characterized in that The automobile shock absorber damping failure monitoring system further comprises a CAN transceiver, and the CAN transceiver and the central control system are both connected to a CAN bus; The CAN transceiver is used to send the prompt information to the central control system through the signal processing module.

3. The system according to claim 1, characterized in that The signal detection device includes an acceleration sensor, and the sensitivity of the acceleration sensor is determined according to a mapping relationship between a detection signal of the acceleration sensor and acceleration information.

4. The system according to claim 1, characterized in that The signal detection device is specifically arranged on the vehicle bearing frame on the vehicle driving chassis close to the shock absorber.

5. A method for monitoring damping failure of automobile shock absorber, characterized in that: include: The vibration signal of the vehicle in driving is detected in real time by a signal detection device, wherein the signal detection device is arranged on the driving chassis of the vehicle, the driving chassis of the vehicle includes a shock absorber, and the vibration signal includes a vibration acceleration signal in a vertical direction when the vehicle is driving; Acquire the vibration signal detected by the signal detection device through the signal processing module, and generate prompt information of whether the shock absorber has damping failure according to the vibration signal; Controlling the vehicle-mounted system to generate an output signal corresponding to the prompt information through a central control system according to the prompt information, wherein the output signal is used to indicate whether the shock absorber is in a state of damping failure; The vibration signal is a time domain signal; The method of generating prompt information on whether the shock absorber has a damping failure based on the vibration signal includes: converting the time domain signal into a frequency domain signal; extracting a target signal within a preset frequency range in the frequency domain signal; judging whether the shock absorber has a damping failure based on the attribute characteristics of the target signal, and generating prompt information on whether the shock absorber has a damping failure.

6. The method according to claim 5, characterized in that The attribute characteristics include vibration amplitude; The step of judging whether the shock absorber has a damping failure according to the attribute characteristics of the target signal includes: Determining, according to the target signal, a vibration amplitude at a preset frequency of the target signal; When the vibration amplitude is greater than or equal to a preset threshold, determining that the shock absorber has failed in damping; When the vibration amplitude is less than a preset threshold, it is determined that the shock absorber damping has not failed.

7. The method according to claim 5, characterized in that The converting the time domain signal into a frequency domain signal comprises: The time domain signal is converted into a frequency domain signal using a fast Fourier transform algorithm.

8. The method according to claim 5, characterized in that Before extracting the target signal within a preset frequency range from the frequency domain signal, the method further includes: Inputting the preset damping coefficient of the shock absorber and the roughness information of the road surface on which the vehicle is traveling into a pre-built simulation model of vehicle vibration, wherein the simulation model is a multi-degree-of-freedom whole vehicle equivalent model; Running the simulation model to obtain first vibration data of the simulation model; adjusting the damping coefficient of the shock absorber to obtain an updated simulation model; Running the updated simulation model to obtain second vibration data of the updated simulation model; A preset frequency range is determined according to the attribute characteristics of the first vibration data and the attribute characteristics of the second vibration data.

9. The method according to claim 8, characterized in that The simulation model of automobile vibration at least includes: a whole vehicle body, an automobile suspension system and wheels, and the automobile suspension system includes springs and shock absorbers arranged in parallel.

10. The method according to claim 5, characterized in that The output signal corresponding to the prompt information that the shock absorber damping has failed is the first output signal, and the output signal corresponding to the prompt information that the shock absorber damping has not failed is the second output signal; The step of controlling the vehicle-mounted system to generate an output signal corresponding to the prompt information according to the prompt information includes: In the case where the prompt information is prompt information of shock absorber damping failure, controlling the vehicle-mounted system to generate a first output signal, wherein the first output signal is used to indicate a state of shock absorber damping failure; In a case where the prompt information is prompt information that the shock absorber damping has not failed, the vehicle-mounted system is controlled to generate a second output signal, where the second output signal is used to indicate a state that the shock absorber damping has not failed.

11. The method according to claim 5, characterized in that After acquiring the vibration signal detected by the signal detection device through the signal processing module, the method further includes: The vibration signal is acquired from the signal processing module through the central control system, and the vibration signal is transmitted to the cloud platform.

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