Vehicle-mounted ceiling screen damping fault detection method, device and equipment and storage medium

Abstract

The invention discloses a vehicle-mounted ceiling screen damping fault detection method, device and equipment and a storage medium, and relates to the technical field of damping fault detection.The vehicle-mounted ceiling screen damping fault detection method comprises the steps that initial screen motion parameters are monitored, determining the stability of an initial screen rotation speed according to the initial screen motion parameters, calculating an initial damping force, and judging whether damping has a fault according to the stability of the initial screen rotation speed and the initial damping force; real-time screen motion parameters are monitored, the current temperature is obtained, the stability of the real-time screen rotation speed is determined according to the real-time screen motion parameters and the current temperature, the real-time damping force is calculated, and whether damping has faults or not is judged according to the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; and when it is detected that the damping has a fault, fault alarm information is generated. The cost of damping fault detection can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of damping fault detection, and in particular to a method, device, equipment and storage medium for detecting damping fault of a vehicle-mounted ceiling screen. Background Art

[0002] The design of the motion mechanism of the ceiling-mounted screen is sophisticated and complex, and the split modules include three parts: the motor, the reduction gearbox, and the damper. The damping mechanism is responsible for locking the screen in a stationary state to prevent the screen from shaking due to bumps during vehicle driving; damping failure includes damping force attenuation, damping force increase, and damping failure (unstable and large fluctuations in the operating damping force); damping failure can cause screen shaking, running stalls, running noise and other problems during vehicle driving, so it is necessary to perform damping fault detection on the vehicle-mounted ceiling screen. The more commonly used damping force detection solution is to complete the damping and the shaft crimping without installing gears. The shaft is dragged by a jig to detect whether the damping holding torque is within the set value range. However, this method requires the separate design of a towing jig and the addition of a calibration station before the gear is installed, which increases production costs. Therefore, how to reduce the cost of damping fault detection for vehicle-mounted ceiling screens is a problem that still needs to be solved.

[0003] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of this application is to provide a method, device, equipment and storage medium for detecting damping faults of vehicle-mounted ceiling screens, aiming to solve the technical problem of how to reduce the cost of detecting damping faults of vehicle-mounted ceiling screens.

[0005] To achieve the above objectives, the present application proposes a method for detecting a vehicle-mounted ceiling screen damping fault, the method comprising:

[0006] When the vehicle-mounted ceiling screen is turned on or off for the first time, initial screen motion parameters are monitored, the stability of the initial screen rotation speed is determined based on the initial screen motion parameters, and the initial damping force is calculated. Based on the stability of the initial screen rotation speed and the initial damping force, it is determined whether there is a damping fault, and the initial damping force when the damping is normal is recorded as the baseline damping force;

[0007] When this is not the first time the vehicle-mounted ceiling screen is turned on or off, real-time screen motion parameters are monitored and the current temperature is obtained, stability of the real-time screen rotation speed is determined based on the real-time screen motion parameters and the current temperature, and a real-time damping force is calculated, and whether there is a damping fault is determined based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force;

[0008] When a fault is detected in the damping, a fault alarm message is generated.

[0009] In one embodiment, the step of determining the stability of the initial screen rotation speed according to the initial screen motion parameters includes:

[0010] determining an initial screen rotation speed according to the initial screen motion parameter;

[0011] Calculating the speed difference of the initial screen rotation speed at two adjacent moments to obtain multiple speed changes;

[0012] comparing the plurality of speed changes with a preset change threshold;

[0013] When the multiple speed changes are all smaller than the preset change threshold, it is determined that the initial screen rotation speed is in a stable state;

[0014] When the number of the multiple speed changes that is greater than the preset change threshold exceeds the preset number threshold, it is determined that the initial screen rotation speed is in an unstable state.

[0015] In one embodiment, after comparing the multiple speed changes with a preset change threshold, the method further includes:

[0016] When the number of the speed changes that is greater than the preset change threshold is greater than zero but does not exceed the preset number threshold, a screen on / off instruction is generated;

[0017] The vehicle-mounted ceiling screen is again turned on and off according to the screen switch instruction until it is determined whether there is a damping fault.

[0018] In one embodiment, the step of determining whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force includes:

[0019] When the initial screen rotation speed is in a stable state and the initial damping force satisfies a preset threshold range, it is determined that the damping is normal;

[0020] If the initial screen rotation speed is in an unstable state or the initial damping force does not meet a preset threshold range, it is determined that there is a damping fault.

[0021] In one embodiment, the step of calculating the real-time damping force includes:

[0022] Calculating a to-be-determined damping force according to the real-time screen motion parameters;

[0023] determining a correction coefficient according to the current temperature;

[0024] The real-time damping force is calculated according to the undetermined damping force and the correction coefficient.

[0025] In one embodiment, the step of determining whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force includes:

[0026] Calculate the damping force deviation value according to the real-time damping force and the reference damping force

[0027] When the real-time screen rotation speed is in a stable state and the damping force deviation value is not greater than a preset deviation threshold, it is determined that the damping is normal;

[0028] If the real-time screen rotation speed is in an unstable state or the damping force deviation value is greater than a preset deviation threshold, it is determined that there is a damping fault.

[0029] In one embodiment, after generating fault warning information when a damping fault is detected, the method further includes:

[0030] Obtain the total number of times the vehicle-mounted ceiling screen is turned on and off;

[0031] When the total number of on-off operations is greater than a preset on-off number threshold, obtaining the latest damping force of the on-board ceiling screen for on-off operations;

[0032] adjusting the screen motion parameters according to the latest damping force to obtain target screen motion parameters;

[0033] When a screen on / off operation instruction is received, the target screen motion parameter is used to perform a screen on / off operation on the vehicle-mounted ceiling screen.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle-mounted ceiling screen damping fault detection device, the vehicle-mounted ceiling screen damping fault detection device comprising:

[0035] an initial detection module, configured to monitor initial screen motion parameters when the vehicle-mounted ceiling screen is first opened or closed, determine the stability of the initial screen rotation speed and calculate the initial damping force based on the initial screen motion parameters, determine whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and record the initial damping force when the damping is normal as the baseline damping force;

[0036] a real-time detection module, configured to monitor real-time screen motion parameters and obtain a current temperature when the vehicle-mounted ceiling screen resistor is not being opened or closed for the first time, determine the stability of the real-time screen rotation speed and calculate a real-time damping force based on the real-time screen motion parameters and the current temperature, and determine whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force;

[0037] The alarm generation module is used to generate fault alarm information when a fault in the damping is detected.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle-mounted ceiling screen damping fault detection device, which includes: a memory, a processor, and a computer program stored on the memory and runnable on the processor, and the computer program is configured to implement the steps of the vehicle-mounted ceiling screen damping fault detection method as described above.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the vehicle-mounted ceiling screen damping fault detection method as described above are implemented.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the vehicle-mounted ceiling screen damping fault detection method as described above.

[0041] The present application provides a method for detecting damping faults of a vehicle-mounted ceiling screen. When the vehicle-mounted ceiling screen is turned on or off for the first time, the present application monitors the initial screen motion parameters, determines the stability of the initial screen rotation speed based on the initial screen motion parameters and calculates the initial damping force, determines whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and records the initial damping force when the damping is normal as the reference damping force; when it is not the first time that the vehicle-mounted ceiling screen is turned on or off, the present application monitors the real-time screen motion parameters and obtains the current temperature, determines the stability of the real-time screen rotation speed based on the real-time screen motion parameters and the current temperature and calculates the real-time damping force, determines whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; and generates a fault alarm message when a damping fault is detected.

[0042] In summary, the present application detects the damping fault of the vehicle-mounted ceiling screen online by monitoring the screen motion parameters, without the need to design a separate towing fixture, thereby reducing the cost of detecting the damping fault of the vehicle-mounted ceiling screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 A flowchart of the first embodiment of the vehicle-mounted ceiling screen damping fault detection method provided in this application;

[0046] Figure 2 A schematic diagram of the initial damping fault detection process provided in Example 1 of the vehicle-mounted ceiling screen damping fault detection method of this application;

[0047] Figure 3 A schematic diagram of a subsequent damping fault detection process provided in Example 1 of the vehicle-mounted ceiling screen damping fault detection method of this application;

[0048] Figure 4 A flow chart illustrating a second embodiment of a vehicle-mounted ceiling screen damping fault detection method of the present application;

[0049] Figure 5 This is a schematic diagram of the module structure of the vehicle-mounted ceiling screen damping fault detection device according to an embodiment of the present application;

[0050] Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle-mounted ceiling screen damping fault detection method in the embodiment of the present application.

[0051] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0053] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0054] The main solution of the present application is to monitor the initial screen motion parameters when the vehicle-mounted ceiling screen is turned on or off for the first time, determine the stability of the initial screen rotation speed and calculate the initial damping force based on the initial screen motion parameters, judge whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and record the initial damping force when the damping is normal as the reference damping force; when it is not the first time that the vehicle-mounted ceiling screen is turned on or off, monitor the real-time screen motion parameters and obtain the current temperature, determine the stability of the real-time screen rotation speed and calculate the real-time damping force based on the real-time screen motion parameters and the current temperature, judge whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; when a damping fault is detected, generate a fault alarm message.

[0055] Currently, the most commonly used damping force detection method involves crimping the damper and shaft together without installing the gears. The shaft is then dragged with a jig to test whether the damping holding torque is within the set value range. However, this method requires the design of a separate dragging jig and the addition of a calibration station before gear installation, which increases production costs. Therefore, reducing the cost of detecting damping faults in automotive ceiling screens remains an unresolved issue.

[0056] In summary, the present application detects the damping fault of the vehicle-mounted ceiling screen online by monitoring the screen motion parameters, without the need to design a separate towing fixture, thereby reducing the cost of detecting the damping fault of the vehicle-mounted ceiling screen.

[0057] Based on this, the embodiment of the present application provides a vehicle-mounted ceiling screen damping fault detection method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle-mounted ceiling screen damping fault detection method of the present application.

[0058] In this embodiment, the vehicle-mounted ceiling screen damping fault detection method includes steps S10 to S30:

[0059] Step S10: When the vehicle-mounted ceiling screen is turned on or off for the first time, initial screen motion parameters are monitored, the stability of the initial screen rotation speed is determined based on the initial screen motion parameters, and an initial damping force is calculated. Whether there is a damping fault is determined based on the stability of the initial screen rotation speed and the initial damping force, and the initial damping force when the damping is normal is recorded as a reference damping force.

[0060] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device capable of performing the above functions, such as a vehicle-mounted ceiling screen damping fault detection device. This embodiment and the following embodiments will be described below using the vehicle-mounted ceiling screen damping fault detection device as an example.

[0061] It should be noted that the kinematic equation of the ceiling screen is:

[0062]

[0063] Where T e is the motor output torque, Rate is the speed ratio of the reducer, η is the efficiency of the reducer, T l is the damping friction force, J is the LCM inertia, ω m is the LCM rotation angular velocity, G is the LCM weight, H is the LCM height, and θ is the LCM rotation angle.

[0064] T e Motor output torque: The motor drive adopts FOC vector control, and the motor torque equation is T e =K t *I q , K t The motor torque constant is a constant value in the rated operating range and can be determined by the current I q Reverse motor torque.

[0065] Rate reducer speed ratio and η reducer efficiency: determined by the gear structure characteristics and relatively stable.

[0066] J screen inertia and ω m Rotational angular velocity: The maximum screen rotation speed is 3 rpm. When the motor speed tends to be stable, The term can be approximated to 0;

[0067] T l Damping friction: It can be calculated by reverse deduction based on the kinematic equation of the ceiling screen, but the limited temperature characteristics are more sensitive and need to be compensated according to the ambient temperature;

[0068] It should be noted that when the vehicle ceiling screen is turned on or off for the first time, it is usually during the test period and the environment is at room temperature. At this time, temperature compensation for damping friction is not required. The baseline damping force is the damping force when there is no fault during the initial test. Subsequent damping fault detection can use the baseline damping force to determine whether the damping effect has changed.

[0069] In one feasible embodiment, the step of determining whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force includes: when the initial screen rotation speed is in a stable state and the initial damping force satisfies a preset threshold range, determining that the damping is normal; if the initial screen rotation speed is in an unstable state or the initial damping force does not satisfy the preset threshold range, determining that there is a damping fault.

[0070] It is understandable that this embodiment determines whether there is a fault in the damping through the initial screen rotation speed and the initial damping force. When the initial screen rotation speed is not in a stable state, it means that the ceiling screen is not smooth when turning the screen on and off, there is a jamming phenomenon, and the damping force is unstable and jumps greatly, which can be determined to be a fault in the damping; when the initial damping force does not meet the preset threshold range, it means that there is a fault in the damping. When the initial screen rotation speed is in a stable state and the initial damping force meets the preset threshold range, it is determined that the damping is normal. The damping initial detection process can be referred to Figure 2 , Figure 2 Schematic diagram of the initial damping fault detection process. Figure 2 During the initial power-up, the ceiling screen is turned on and off. The system then checks whether the speed is stable. If not, the system returns to the process of turning the ceiling screen on and off if the number of instabilities is less than a threshold. If the number of instabilities is greater than a threshold, a damping anomaly is determined. If the speed is stable, the system calculates the damping friction and checks whether the on / off operation is complete. If not, the system returns to the process of turning the ceiling screen on and off. If so, the system checks whether the damping friction meets the requirements. If not, it indicates a damping anomaly. If it meets the requirements, the damping friction is written to the flash memory.

[0071] Step S20: When this is not the first time that the vehicle-mounted ceiling screen is turned on or off, real-time screen motion parameters are monitored and the current temperature is obtained. The stability of the real-time screen rotation speed is determined based on the real-time screen motion parameters and the current temperature, and a real-time damping force is calculated. The presence of a damping fault is determined based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force.

[0072] It should be noted that if this is not the first time the vehicle ceiling screen is turned on or off, the fault is not determined directly based on the damping force. Instead, the detected damping force is compared with a baseline damping force, and the difference is used to determine whether the damping is faulty. Furthermore, the influence of ambient temperature must be considered, and the damping friction force calculated using the kinematic formula must be temperature compensated.

[0073] In a feasible manner, the step of calculating the real-time damping force includes: calculating a pending damping force according to the real-time screen motion parameters; determining a correction coefficient according to the current temperature; and calculating the real-time damping force according to the pending damping force and the correction coefficient.

[0074] It can be understood that the unknown damping force can be calculated based on the real-time screen motion parameters through the ceiling screen kinematic equation. The correction coefficient is determined by the current temperature, and the unknown damping force can be modified to reduce the influence of temperature and obtain the real-time damping force.

[0075] In a feasible embodiment, the step of determining whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force includes: calculating the damping force deviation value based on the real-time damping force and the reference damping force; when the real-time screen rotation speed is in a stable state and the damping force deviation value is not greater than a preset deviation threshold, it is determined that the damping is normal; if the real-time screen rotation speed is in an unstable state or the damping force deviation value is greater than the preset deviation threshold, it is determined that there is a damping fault.

[0076] It is understandable that when the deviation between the real-time damping force and the reference damping force exceeds the threshold, it means that the current damping is too different from the damping in the normal state, which will cause the damping force to attenuate or increase. During the vehicle's movement, problems such as screen shaking, stalling, and noise will occur. For the subsequent damping detection process, please refer to Figure 3 , Figure 3 This is a schematic diagram of the subsequent damping fault detection process. Figure 3 In the process, the initial damping friction is read first, that is, the reference damping force is read, and then the ceiling screen is turned on and off. Then, it is determined whether the speed is stable. If it is not stable, when the number of instabilities is not greater than the threshold, it returns to the step of turning the ceiling screen on and off. When the number of instabilities is greater than the threshold, it is determined that the damping is abnormal. If the speed is stable, the damping friction is calculated and the temperature is collected to correct the damping friction. Then, it is detected whether the on and off operation is completed. If not, it returns to the step of turning the ceiling screen on and off. If it is completed, it is determined whether the difference between the corrected damping friction and the initial damping friction exceeds the threshold. If it exceeds the threshold, it indicates that the damping is abnormal; if it does not exceed the threshold, it indicates that the damping is normal. At this time, the number of speed instabilities, the total number of on and off operations, and the current damping friction are written to the flash memory.

[0077] Step S30: When a damping fault is detected, a fault warning message is generated.

[0078] It is understandable that according to the type of damping failure, such as damping force attenuation, damping force increase and damping force instability, corresponding fault alarm information is generated to remind the user that the vehicle-mounted ceiling screen has a fault.

[0079] In a feasible embodiment, when a damping fault is detected, after generating a fault alarm message, it also includes: obtaining the total number of times the vehicle-mounted ceiling screen is switched on and off; when the total number of switches is greater than a preset switch number threshold, obtaining the latest damping force for the vehicle-mounted ceiling screen to perform the switch operation; adjusting the screen motion parameters according to the latest damping force to obtain the target screen motion parameters; when a switch screen operation instruction is received, using the target screen motion parameters to perform the switch operation on the vehicle-mounted ceiling screen.

[0080] It is understandable that when the vehicle-mounted ceiling screen is used too many times, in order to extend the damping life and reduce damping attenuation, the screen motion parameters can be adjusted according to the latest damping force. The specific adjusted screen motion parameters include speed and driving torque. By reducing the rotation speed and reducing the driving torque, the damping service life can be effectively extended.

[0081] In this embodiment, when the vehicle-mounted ceiling screen is turned on or off for the first time, the initial screen motion parameters are monitored, the stability of the initial screen rotation speed is determined and the initial damping force is calculated based on the initial screen motion parameters, whether there is a damping fault is judged based on the stability of the initial screen rotation speed and the initial damping force, and the initial damping force when the damping is normal is recorded as the reference damping force; when it is not the first time that the vehicle-mounted ceiling screen is turned on or off, the real-time screen motion parameters are monitored and the current temperature is obtained, the stability of the real-time screen rotation speed is determined and the real-time damping force is calculated based on the real-time screen motion parameters and the current temperature, and whether there is a damping fault is judged based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; when a damping fault is detected, a fault alarm message is generated.

[0082] In summary, this embodiment detects the damping fault of the vehicle-mounted ceiling screen online by monitoring the screen motion parameters, without the need to design a separate towing fixture, thereby reducing the cost of detecting the damping fault of the vehicle-mounted ceiling screen.

[0083] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 4 , step S10 further includes steps S101 to S105:

[0084] Step S101: determining an initial screen rotation speed according to the initial screen motion parameters;

[0085] It can be understood that the initial screen motion parameters are the variables of the ceiling screen kinematic equation, including motor output torque, reducer speed ratio, reducer efficiency, inertia, rotation angular velocity, weight, height, rotation angle, etc.

[0086] Step S102: Calculating the speed difference between the initial screen rotation speed at two adjacent moments to obtain a plurality of speed changes;

[0087] It is understood that when detecting whether the speed is stable, the speed can be obtained at different times and compared, and the stability can be determined by the change. During the movement of the ceiling screen, the entire movement process can be divided into multiple moments, and the speed difference between the initial screen rotation speed at two adjacent moments can be calculated to obtain multiple speed changes.

[0088] Step S103: comparing the multiple speed changes with a preset change threshold;

[0089] In a feasible embodiment, after comparing the multiple speed changes with the preset change threshold, it also includes: when the number of the multiple speed changes that is greater than the preset change threshold is greater than zero but does not exceed the preset number threshold, a switch screen instruction is generated; according to the switch screen instruction, the vehicle-mounted ceiling screen is again switched on and off until it is determined whether there is a damping fault.

[0090] It is understandable that when the number of the multiple speed changes that is greater than the preset change threshold is greater than zero but does not exceed the preset number threshold, it indicates that the speed is unstable, but the number of instability is small, which may be an accidental situation. Therefore, the vehicle-mounted ceiling screen is turned on and off again, and the speed stability is continued to be tested until it is determined whether the speed is stable, so as to judge whether there is a damping fault.

[0091] Step S104: when the multiple speed changes are all smaller than the preset change threshold, it is determined that the initial screen rotation speed is in a stable state;

[0092] It is understandable that when the multiple speed changes are all smaller than the preset change threshold, it means that the speed has been in a stable state without obvious fluctuations, and it can be determined that the initial screen rotation speed is in a stable state.

[0093] Step S105: When the number of the multiple speed changes that is greater than the preset change threshold exceeds the preset number threshold, it is determined that the initial screen rotation speed is in an unstable state.

[0094] It is understandable that when the number of speed changes greater than the preset change threshold exceeds the preset number threshold, it indicates that the speed fluctuates and the number of fluctuations is large. The possibility of accidental phenomenon can be ruled out, and it is determined that the initial screen rotation speed is in an unstable state.

[0095] This embodiment determines the initial screen rotation speed based on the initial screen motion parameters; calculates the speed difference between the initial screen rotation speeds at two adjacent moments to obtain multiple speed variations; compares these multiple speed variations with a preset variation threshold; and determines that the initial screen rotation speed is stable when all of the multiple speed variations are less than the preset variation threshold; and determines that the initial screen rotation speed is unstable when the number of these multiple speed variations that exceeds the preset variation threshold exceeds a preset number threshold. This embodiment uses speed variations to determine whether the plane selection speed is stable, and introduces a stability number to eliminate misjudgments caused by accidental situations, thereby accurately determining speed stability.

[0096] This application also provides a vehicle-mounted ceiling screen damping fault detection device, please refer to Figure 5 , the vehicle-mounted ceiling screen damping fault detection device includes:

[0097] The initial detection module 10 is configured to monitor initial screen motion parameters when the vehicle-mounted ceiling screen is turned on or off for the first time, determine the stability of the initial screen rotation speed and calculate the initial damping force based on the initial screen motion parameters, determine whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and record the initial damping force when the damping is normal as the reference damping force;

[0098] a real-time detection module 20 for monitoring real-time screen motion parameters and obtaining a current temperature when the vehicle-mounted ceiling screen resistor is not being turned on or off for the first time, determining stability of the real-time screen rotation speed based on the real-time screen motion parameters and the current temperature, and calculating a real-time damping force, and determining whether a damping fault exists based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force;

[0099] The alarm generating module 30 is configured to generate fault alarm information when a damping fault is detected.

[0100] In this embodiment, when the vehicle-mounted ceiling screen is turned on or off for the first time, the initial screen motion parameters are monitored, the stability of the initial screen rotation speed is determined and the initial damping force is calculated based on the initial screen motion parameters, whether there is a damping fault is judged based on the stability of the initial screen rotation speed and the initial damping force, and the initial damping force when the damping is normal is recorded as the reference damping force; when it is not the first time that the vehicle-mounted ceiling screen is turned on or off, the real-time screen motion parameters are monitored and the current temperature is obtained, the stability of the real-time screen rotation speed is determined and the real-time damping force is calculated based on the real-time screen motion parameters and the current temperature, and whether there is a damping fault is judged based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; when a damping fault is detected, a fault alarm message is generated.

[0101] In summary, this embodiment detects the damping fault of the vehicle-mounted ceiling screen online by monitoring the screen motion parameters, without the need to design a separate towing fixture, thereby reducing the cost of detecting the damping fault of the vehicle-mounted ceiling screen.

[0102] In one embodiment, the initial detection module 10 is further used to determine the initial screen rotation speed based on the initial screen motion parameters; calculate the speed difference of the initial screen rotation speed at two adjacent moments to obtain multiple speed changes; compare the multiple speed changes with a preset change threshold; when the multiple speed changes are all less than the preset change threshold, it is determined that the initial screen rotation speed is in a stable state; when the number of the multiple speed changes that is greater than the preset change threshold exceeds a preset number threshold, it is determined that the initial screen rotation speed is in an unstable state.

[0103] In one embodiment, the initial detection module 10 is also used to generate a screen switch instruction when the number of the multiple speed changes that is greater than the preset change threshold is greater than zero but does not exceed the preset number threshold; and the vehicle-mounted ceiling screen is again switched on and off according to the screen switch instruction until it is determined whether there is a damping fault.

[0104] In one embodiment, the real-time detection module 20 is further configured to determine that the damping is normal when the initial screen rotation speed is in a stable state and the initial damping force satisfies a preset threshold range; and to determine that there is a damping fault if the initial screen rotation speed is in an unstable state or the initial damping force does not satisfy the preset threshold range.

[0105] In one embodiment, the real-time detection module 20 is further configured to calculate a pending damping force based on the real-time screen motion parameters; determine a correction coefficient based on the current temperature; and calculate the real-time damping force based on the pending damping force and the correction coefficient.

[0106] In one embodiment, the alarm generation module 30 is also used to calculate the damping force deviation value based on the real-time damping force and the reference damping force. When the real-time screen rotation speed is in a stable state and the damping force deviation value is not greater than the preset deviation threshold, it is determined that the damping is normal; if the real-time screen rotation speed is in an unstable state or the damping force deviation value is greater than the preset deviation threshold, it is determined that there is a damping fault.

[0107] In one embodiment, the alarm generation module 30 is also used to obtain the total number of times the vehicle-mounted ceiling screen is turned on and off; when the total number of times the screen is turned on and off is greater than a preset threshold value of the number of times the screen is turned on and off, the latest damping force for the vehicle-mounted ceiling screen to be turned on and off is obtained; the screen motion parameters are adjusted according to the latest damping force to obtain target screen motion parameters; when a screen turn-on and turn-off operation instruction is received, the target screen motion parameters are used to perform a screen turn-on and turn-off operation on the vehicle-mounted ceiling screen.

[0108] The vehicle-mounted ceiling screen damping fault detection device provided in this application, which adopts the vehicle-mounted ceiling screen damping fault detection method of the above-mentioned embodiment, can solve the technical problem of how to reduce the cost of vehicle-mounted ceiling screen damping fault detection. Compared with the existing technology, the beneficial effects of the vehicle-mounted ceiling screen damping fault detection device provided in this application are the same as the beneficial effects of the vehicle-mounted ceiling screen damping fault detection method provided in the above-mentioned embodiment, and the other technical features of the vehicle-mounted ceiling screen damping fault detection device are the same as the features disclosed in the above-mentioned embodiment method, and are not further described here.

[0109] The present application provides a vehicle-mounted ceiling screen damping fault detection device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle-mounted ceiling screen damping fault detection method in the above-mentioned embodiment one.

[0110] Reference below Figure 6 , which shows a schematic structural diagram of a vehicle-mounted ceiling screen damping fault detection device suitable for implementing an embodiment of the present application. The vehicle-mounted ceiling screen damping fault detection device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The vehicle-mounted ceiling screen damping fault detection device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0111] like Figure 6As shown, the vehicle-mounted ceiling screen damping fault detection device may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the ROM (Read Only Memory) 1002 or the program loaded from the storage device 1003 to the RAM (Random Access Memory) 1004. Various programs and data required for the operation of the vehicle-mounted ceiling screen damping fault detection device are also stored in the RAM 1004. The processing device 1001, ROM 1002 and RAM 1004 are connected to each other via a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle-mounted ceiling screen damping fault detection device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a vehicle-mounted ceiling screen damping fault detection device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0112] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0113] The vehicle-mounted ceiling screen damping fault detection device provided in this application, which employs the vehicle-mounted ceiling screen damping fault detection method of the above-mentioned embodiment, can solve the technical problem of how to reduce the cost of vehicle-mounted ceiling screen damping fault detection. Compared with the prior art, the beneficial effects of the vehicle-mounted ceiling screen damping fault detection device provided in this application are the same as the beneficial effects of the vehicle-mounted ceiling screen damping fault detection method provided in the above-mentioned embodiment, and the other technical features of the vehicle-mounted ceiling screen damping fault detection device are the same as those disclosed in the method of the above-mentioned embodiment, and are not further described here.

[0114] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0116] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle-mounted ceiling screen damping fault detection method in the above-mentioned embodiment.

[0117] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0118] The computer-readable storage medium may be included in the vehicle-mounted ceiling screen damping fault detection device; or it may exist independently without being assembled into the vehicle-mounted ceiling screen damping fault detection device.

[0119] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the vehicle-mounted ceiling screen damping fault detection device, the vehicle-mounted ceiling screen damping fault detection device: when the vehicle-mounted ceiling screen is turned on or off for the first time, monitor the initial screen motion parameters, determine the stability of the initial screen rotation speed and calculate the initial damping force based on the initial screen motion parameters, judge whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and record the initial damping force when the damping is normal as the reference damping force; when it is not the first time that the vehicle-mounted ceiling screen is turned on or off, monitor the real-time screen motion parameters and obtain the current temperature, determine the stability of the real-time screen rotation speed and calculate the real-time damping force based on the real-time screen motion parameters and the current temperature, judge whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force and the reference damping force; when a damping fault is detected, generate a fault alarm message.

[0120] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0121] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0122] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0123] The computer-readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned vehicle-mounted ceiling screen damping fault detection method. This computer-readable storage medium can address the technical problem of reducing the cost of detecting vehicle-mounted ceiling screen damping faults. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the vehicle-mounted ceiling screen damping fault detection method provided in the aforementioned embodiment, and are not further elaborated here.

[0124] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the above-mentioned vehicle-mounted ceiling screen damping fault detection method.

[0125] The computer program product provided in this application can solve the technical problem of how to reduce the cost of detecting vehicle-mounted ceiling screen damping faults. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the vehicle-mounted ceiling screen damping fault detection method provided in the above-mentioned embodiment, and will not be repeated here.

[0126] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle-mounted ceiling screen damping fault detection method, characterized in that: The method includes: When the vehicle-mounted ceiling screen is turned on or off for the first time, initial screen motion parameters are monitored, the stability of the initial screen rotation speed is determined based on the initial screen motion parameters, and the initial damping force is calculated. Based on the stability of the initial screen rotation speed and the initial damping force, it is determined whether there is a damping fault, and the initial damping force when the damping is normal is recorded as the baseline damping force; When this is not the first time the vehicle-mounted ceiling screen is turned on or off, real-time screen motion parameters are monitored and the current temperature is obtained, stability of the real-time screen rotation speed is determined based on the real-time screen motion parameters and the current temperature, and a real-time damping force is calculated, and whether there is a damping fault is determined based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force; When a fault is detected in the damping, a fault alarm message is generated.

2. The method according to claim 1, wherein The step of determining the stability of the initial screen rotation speed according to the initial screen motion parameters comprises: determining an initial screen rotation speed according to the initial screen motion parameter; Calculating the speed difference of the initial screen rotation speed at two adjacent moments to obtain multiple speed changes; comparing the plurality of speed changes with a preset change threshold; When the multiple speed changes are all smaller than the preset change threshold, it is determined that the initial screen rotation speed is in a stable state; When the number of the multiple speed changes that is greater than the preset change threshold exceeds the preset number threshold, it is determined that the initial screen rotation speed is in an unstable state.

3. The method according to claim 2, wherein After comparing the multiple speed changes with the preset change threshold, the method further includes: When the number of the speed changes that is greater than the preset change threshold is greater than zero but does not exceed the preset number threshold, a screen on / off instruction is generated; The vehicle-mounted ceiling screen is again turned on and off according to the screen switch instruction until it is determined whether there is a damping fault.

4. The method according to claim 1, wherein The step of determining whether there is a damping fault according to the stability of the initial screen rotation speed and the initial damping force includes: When the initial screen rotation speed is in a stable state and the initial damping force satisfies a preset threshold range, it is determined that the damping is normal; If the initial screen rotation speed is in an unstable state or the initial damping force does not meet a preset threshold range, it is determined that there is a damping fault.

5. The method according to claim 1, wherein The step of calculating the real-time damping force comprises: Calculating a to-be-determined damping force according to the real-time screen motion parameters; determining a correction coefficient according to the current temperature; The real-time damping force is calculated according to the undetermined damping force and the correction coefficient.

6. The method according to claim 1, wherein The step of determining whether there is a damping fault according to the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force includes: Calculate the damping force deviation value according to the real-time damping force and the reference damping force When the real-time screen rotation speed is in a stable state and the damping force deviation value is not greater than a preset deviation threshold, it is determined that the damping is normal; If the real-time screen rotation speed is in an unstable state or the damping force deviation value is greater than a preset deviation threshold, it is determined that there is a damping fault.

7. The method according to claim 1, wherein When a damping fault is detected, after generating fault warning information, the method further includes: Obtain the total number of times the vehicle-mounted ceiling screen is turned on and off; When the total number of on-off operations is greater than a preset on-off number threshold, obtaining the latest damping force of the on-board ceiling screen for on-off operations; adjusting the screen motion parameters according to the latest damping force to obtain target screen motion parameters; When a screen on / off operation instruction is received, the target screen motion parameter is used to perform a screen on / off operation on the vehicle-mounted ceiling screen.

8. A vehicle-mounted ceiling screen damping fault detection device, characterized in that: The device comprises: an initial detection module, configured to monitor initial screen motion parameters when the vehicle-mounted ceiling screen is first opened or closed, determine the stability of the initial screen rotation speed and calculate the initial damping force based on the initial screen motion parameters, determine whether there is a damping fault based on the stability of the initial screen rotation speed and the initial damping force, and record the initial damping force when the damping is normal as the baseline damping force; a real-time detection module, configured to monitor real-time screen motion parameters and obtain a current temperature when the vehicle-mounted ceiling screen resistor is not being opened or closed for the first time, determine the stability of the real-time screen rotation speed and calculate a real-time damping force based on the real-time screen motion parameters and the current temperature, and determine whether there is a damping fault based on the stability of the real-time screen rotation speed, the real-time damping force, and the reference damping force; The alarm generation module is used to generate fault alarm information when a fault in the damping is detected.

9. A vehicle-mounted ceiling screen damping fault detection device, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle-mounted ceiling screen damping fault detection method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the vehicle-mounted ceiling screen damping fault detection method according to any one of claims 1 to 7 is implemented.

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