Methods, devices, equipment and readable media for detecting the dry run of vehicle electronic water pumps

Abstract

This invention provides a method, apparatus, device, and readable medium for detecting the idling of a vehicle's electronic water pump. Applied to the control system of an electronic water pump, the method acquires a motor speed request for the electronic water pump sent by a preset vehicle control unit. If the specified power-on speed in the motor speed request meets preset power-on conditions, the method controls the motor of the electronic water pump to operate at the power-on speed, and determines the working state of the electronic water pump as powered on. Based on the power-on speed, the method determines whether the electronic water pump in the powered-on state meets preset power-on detection conditions. If the electronic water pump does not meet the power-on detection conditions, the method controls the motor of the powered-on electronic water pump to operate at the preset power-on detection speed. By maintaining the electronic water pump in the powered-on state and performing idling detection, the method ensures that the control system of the electronic water pump can detect the power-on current of the motor, thus realizing the detection of whether the powered-on electronic water pump is idling.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method for detecting the idling of a vehicle electronic water pump, a device for detecting the idling of a vehicle electronic water pump, an electronic device, and a computer-readable medium. Background Technology

[0002] When an electric water pump is powered on and begins operation, its control system acquires the real-time operating current of the motor and compares it with the normal current of the motor during normal operation to determine if the pump is running dry. However, current technology does not determine whether the pump is running dry during power-on, resulting in a lack of measures to address dry-running faults during power-on. If the pump runs dry during power-on, especially when it is not filled with antifreeze or other necessary working fluids, the bearings inside will operate in a "dry-running" state due to the lack of lubrication and cooling. Under these conditions, the bearings are prone to overheating, wear, and even damage due to the lack of necessary lubrication. Summary of the Invention

[0003] This invention provides a method, apparatus, device, and computer-readable storage medium for detecting the dry running of a vehicle's electric water pump. This addresses the problem that existing technologies do not determine whether the electric water pump is running dry during power-on, thus failing to address dry running faults during the power-on process. If the electric water pump runs dry during power-on, especially when the pump is not filled with antifreeze or other necessary working fluids, the bearings inside the pump will operate in a "dry running" state due to the lack of lubrication and cooling. Under such conditions, the bearings are prone to overheating, wear, and even damage due to the lack of necessary lubrication.

[0004] This invention discloses a method for detecting the idling of a vehicle electronic water pump, applied to the control system of the electronic water pump. The method includes:

[0005] Obtain the motor speed request of the electronic water pump sent by the preset vehicle control unit;

[0006] If the specified power-on speed of the motor speed request meets the preset power-on conditions, then the motor of the electronic water pump is controlled to power on and run according to the power-on speed, and the working state of the electronic water pump is determined to be the power-on state.

[0007] Based on the power-on speed, determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions;

[0008] If the electronic water pump does not meet the power-on detection conditions, the motor of the electronic water pump in the power-on state is controlled to run at the preset power-on detection speed.

[0009] While keeping the electronic water pump in the powered-on state, perform an idle test on the electronic water pump.

[0010] Optionally, the method includes:

[0011] If the electronic water pump meets the power-on detection conditions, the motor of the electronic water pump that remains in the powered-on state will operate at the power-on speed specified in the motor speed request.

[0012] Optionally, the step of keeping the electronic water pump in the powered-on state and performing an idle test on the electronic water pump includes:

[0013] Obtain the power-on current of the motor and determine whether the power-on current is less than the preset no-load current;

[0014] If, within a first preset time period, the duration for which the power-on current is less than the preset idling current reaches a first preset time threshold, then the electronic water pump is confirmed to be idling.

[0015] Optionally, the working state further includes a running state; the method includes:

[0016] When the electronic water pump is in the operating state, the operating speed and operating current of the motor are obtained;

[0017] If the operating speed of the motor meets the idling failure condition of the electronic water pump, then determine whether the operating current is less than the preset idling current;

[0018] If, within the second preset time period, the duration for which the operating current is less than the preset idling current reaches the second preset time threshold, then the electronic water pump is confirmed to be idling.

[0019] Optionally, the method further includes:

[0020] If the electronic water pump is running idle, try restarting the electronic water pump to bring it back to normal operation.

[0021] Record the number of times the electronic water pump is restarted;

[0022] If the number of restarts reaches a preset threshold and the idling electronic water pump fails to return to the normal state, then the electronic water pump is controlled to stop operating.

[0023] The information about the idling fault of the electronic water pump is sent to the vehicle control unit.

[0024] Optionally, the step of attempting to restart the electronic water pump if it is running idle, and returning the idle electronic water pump to a normal state, includes:

[0025] If the electronic water pump is running dry, try to restart the electronic water pump and control the motor of the electronic water pump to run at the preset restart speed;

[0026] During the operation of the motor at the preset restart speed, the electronic water pump is determined to be running dry based on the motor's operating current.

[0027] Optionally, during the operation of the motor at the preset restart speed, if the electronic water pump is idling, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

[0028] This invention also discloses a device for detecting the idling of a vehicle electronic water pump, applied to the control system of the electronic water pump, the device comprising:

[0029] The motor speed request acquisition module is used to acquire the motor speed request of the electronic water pump sent by the preset vehicle control unit;

[0030] The first power-on operation module is used to control the motor of the electronic water pump to power on and run at the specified power-on speed if the specified power-on speed of the motor speed request meets the preset power-on conditions, and to determine that the working state of the electronic water pump is the power-on state.

[0031] The power-on detection condition judgment module is used to determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions based on the power-on speed.

[0032] The second power-on operation module is used to control the motor of the power-on electronic water pump to operate at a preset power-on detection speed if the electronic water pump does not meet the power-on detection conditions.

[0033] A holding module is used to keep the electronic water pump in the powered-on state and to perform no-load detection on the electronic water pump.

[0034] Optionally, the device includes:

[0035] The third power-on operation module is used to, if the electronic water pump meets the power-on detection conditions, maintain the power-on state and then operate the motor of the electronic water pump at the power-on speed specified in the motor speed request.

[0036] Optionally, the holding module includes:

[0037] The acquisition submodule is used to acquire the power-on current of the motor and determine whether the power-on current is less than the preset no-load current.

[0038] The confirmation submodule is used to confirm that the electronic water pump is idling if the duration for which the power-on current is less than the preset idling current reaches a first preset duration threshold within a first preset time period.

[0039] Optionally, the working state further includes an operating state; the device includes:

[0040] The acquisition module is used to acquire the operating speed and operating current of the motor when the electronic water pump is in the operating state.

[0041] The judgment module is used to determine whether the operating current is less than the preset no-load current if the operating speed of the motor meets the no-load damage condition of the electronic water pump.

[0042] The idling confirmation module is used to confirm that the electronic water pump is idling if the operating current is less than the preset idling current for a duration that reaches a second preset duration threshold within a second preset time period.

[0043] Optionally, the device further includes:

[0044] The restart module is used to attempt to restart the electronic water pump if it is running idle, so as to change the idle electronic water pump to a normal state.

[0045] A recording module is used to record the number of times the electronic water pump is restarted;

[0046] The stop operation control module is used to control the electronic water pump to stop operating if the number of restarts reaches a preset threshold and the idling electronic water pump has not returned to the normal state.

[0047] The transmitting module is used to send the idling fault information of the electronic water pump to the vehicle control unit.

[0048] Optionally, the restart module includes:

[0049] The restart submodule is used to attempt to restart the electronic water pump if it is running idle, and to control the motor of the electronic water pump to run at a preset restart speed.

[0050] The judgment submodule is used to determine whether the electronic water pump is running dry based on the motor's operating current during the process of the motor running at the preset restart speed.

[0051] Optionally, during the operation of the motor at the preset restart speed, if the electronic water pump is idling, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

[0052] This invention also discloses an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0053] The memory is used to store computer programs;

[0054] When the processor executes a program stored in the memory, it implements the method described in the embodiments of the present invention.

[0055] This invention also discloses one or more computer-readable media storing instructions that, when executed by one or more processors, cause the processors to perform the methods described in this invention.

[0056] The embodiments of the present invention have the following advantages:

[0057] In this embodiment of the invention, a motor speed request for the electronic water pump sent by a preset vehicle control unit is obtained. If the power-on speed specified in the motor speed request meets the preset power-on conditions, the motor of the electronic water pump is controlled to power on and run at the power-on speed, and the working state of the electronic water pump is determined to be the power-on state. Based on the power-on speed, it is determined whether the electronic water pump in the power-on state meets the preset power-on detection conditions. If the electronic water pump does not meet the power-on detection conditions, the motor of the electronic water pump in the power-on state is controlled to power on and run at the preset power-on detection speed. By keeping the electric water pump powered on and performing a no-load test, the control system can detect the motor's current, enabling the detection of no-load operation. This avoids the failure to detect no-load operation during power-on, which could lead to a lack of measures to address the problem. If the electric water pump runs dry during power-on, especially without antifreeze or other necessary working fluids, the bearings inside will operate in a "dry running" state due to the lack of lubrication and cooling, which can easily cause overheating, wear, or even damage. Attached Figure Description

[0058] Figure 1 This is a flowchart of the steps of a vehicle electronic water pump idling detection method provided in an embodiment of the present invention;

[0059] Figure 2 This is a flowchart of the steps of another vehicle electronic water pump idling detection method provided by an embodiment of the present invention;

[0060] Figure 3 This is a flowchart of the steps of another vehicle electronic water pump idling detection method provided by an embodiment of the present invention;

[0061] Figure 4 This is a structural block diagram of a vehicle electronic water pump idling detection device provided in an embodiment of the present invention;

[0062] Figure 5 This is a block diagram of an electronic device provided in an embodiment of the present invention;

[0063] Figure 6 This is a schematic diagram of a computer-readable medium provided in an embodiment of the present invention. Detailed Implementation

[0064] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] To facilitate understanding of the technical solutions and effects of the embodiments of the present invention, the prior art of the present invention will be briefly described below.

[0066] When an electric water pump is powered on and begins operation, its control system acquires the real-time operating current of the motor and compares it with the normal current of the motor during normal operation to determine if the pump is running dry. However, current technology does not determine whether the pump is running dry during power-on, resulting in a lack of measures to address dry-running faults during power-on. If the pump runs dry during power-on, especially when it is not filled with antifreeze or other necessary working fluids, the bearings inside will operate in a "dry-running" state due to the lack of lubrication and cooling. Under these conditions, the bearings are prone to overheating, wear, and even damage due to the lack of necessary lubrication.

[0067] In existing technology, the method for determining whether a running electric water pump is idling is as follows: When the electric water pump is idling, the operating current of the electric water pump motor increases. Therefore, if the operating current is greater than the normal current, the electric water pump control system will determine that the electric water pump is in an idling state. Once idling is detected, the control system will continuously report idling fault information to the VCU (Vehicle Control Unit) and attempt to restart the water pump to restore it to normal operation. If the restart is successful, the water pump will return to normal operation, and the control system will stop reporting idling fault information. If the restart fails, it indicates that the idling fault is still unresolved, and the control system will stop the water pump to prevent further damage to the electric water pump, while continuing to report idling fault information.

[0068] However, if an electric water pump is not used for a long time, air may accumulate inside the pump, forming bubbles. When the electric water pump starts up, these bubbles will increase the operating current of the pump motor, which may lead to false alarms of idling faults, thus affecting the accurate monitoring and data analysis of electric water pump idling faults.

[0069] Reference Figure 1 This diagram illustrates a flowchart of a method for detecting the idling of a vehicle electronic water pump according to an embodiment of the present invention. Applied to the control system of the electronic water pump, the method may specifically include the following steps:

[0070] Step 101: Obtain the motor speed request of the electronic water pump sent by the preset vehicle control unit;

[0071] In this embodiment of the invention, the vehicle may include an electric water pump and a vehicle control unit. The electric water pump is part of the vehicle's cooling system and is used to circulate coolant to maintain a suitable operating temperature for the vehicle's engine and other heat sources. The vehicle control unit can monitor and control the electric water pump to ensure that it operates at an appropriate speed, thereby maintaining the optimal operating condition of the engine cooling system. The electric water pump includes a control system, which may be a control chip that controls the operation of the electric water pump.

[0072] In this embodiment of the invention, the vehicle control unit can send a motor speed request to the electronic water pump to control the motor of the electronic water pump to start power-on operation.

[0073] Step 102: If the specified power-on speed of the motor speed request meets the preset power-on conditions, then control the motor of the electronic water pump to power on and run according to the power-on speed, and determine that the working state of the electronic water pump is the power-on state.

[0074] In this embodiment of the invention, the electronic water pump can receive a motor speed request sent by the vehicle control unit. If the power-on speed specified in the motor speed request meets the preset power-on conditions of the electronic water pump, the control system of the electronic water pump can control the motor of the electronic water pump to operate at the power-on speed and confirm that the working state of the electronic water pump is the power-on state. Specifically, the preset power-on condition can be that the power-on speed specified in the motor speed request sent by the vehicle control unit is a non-zero speed.

[0075] Step 103: Based on the power-on speed, determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions;

[0076] In this embodiment of the invention, the control system of the electronic water pump controls the motor of the electronic water pump to power on and operate at a specified power-on speed according to the motor speed request. After determining that the electronic water pump is in a powered-on state, the control system needs to determine whether the electronic water pump operating at the specified power-on speed meets the preset power-on detection conditions of the electronic water pump, so as to adjust the power-on speed of the motor. Specifically, if the powered-on electronic water pump meets the power-on detection conditions, the control system can detect the power-on current of the motor of the powered-on electronic water pump and determine whether the electronic water pump is idling based on the power-on current. If the powered-on electronic water pump does not meet the power-on detection conditions, the control system cannot detect the power-on current of the motor of the powered-on electronic water pump.

[0077] Step 104: If the electronic water pump does not meet the power-on detection conditions, then the motor of the electronic water pump in the power-on state is controlled to run at the preset power-on detection speed.

[0078] In this embodiment of the invention, the control system of the electronic water pump controls the motor of the electronic water pump to power on and run at the power-on speed specified by the motor speed request. After determining that the working state of the electronic water pump is the power-on state, the control system of the electronic water pump can determine whether the power-on state of the electronic water pump meets the power-on detection conditions of the electronic water pump, and adjust the power-on speed of the motor to ensure that the control system of the electronic water pump can detect the power-on current of the motor.

[0079] The power-on detection condition can be that the specified power-on speed of the motor is not less than a preset power-on detection speed. If the specified power-on speed is not less than the power-on detection speed, the control system of the electronic water pump can detect the power-on current of the electronic water pump motor when the motor runs at the specified power-on speed. If the specified power-on speed is less than the power-on detection speed, the control system of the electronic water pump cannot detect the power-on current of the electronic water pump motor when the motor runs at the specified power-on speed. Specifically, the power-on detection speed can be 3000 rpm (Revolutions Per Minute), 3500 rpm, or 4000 rpm, etc., and this invention does not limit this to any particular speed.

[0080] In this embodiment of the invention, if the power-on electronic water pump does not meet the power-on detection conditions, that is, the motor speed requested to be less than the power-on detection speed, the control system of the electronic water pump controls the motor of the electronic water pump to operate according to the power-on detection speed.

[0081] Step 105: Keep the electronic water pump in the powered-on state and perform an idle test on the electronic water pump.

[0082] In this invention, after the electronic water pump's control system controls the motor to operate at the power-on detection speed, the system maintains the electronic water pump in this powered-on operating state while performing an idling detection. Specifically, the electronic water pump's control system can acquire the motor's power-on current and determine whether the powered-on electronic water pump is idling based on the power-on current.

[0083] In this embodiment of the invention, a motor speed request for the electronic water pump sent by a preset vehicle control unit is obtained. If the power-on speed specified in the motor speed request meets the preset power-on conditions, the motor of the electronic water pump is controlled to power on and run at the power-on speed, and the working state of the electronic water pump is determined to be the power-on state. Based on the power-on speed, it is determined whether the electronic water pump in the power-on state meets the preset power-on detection conditions. If the electronic water pump does not meet the power-on detection conditions, the motor of the electronic water pump in the power-on state is controlled to power on and run at the preset power-on detection speed. By keeping the electric water pump powered on and performing a no-load test, the control system can detect the motor's current, enabling the detection of no-load operation. This avoids the failure to detect no-load operation during power-on, which could lead to a lack of measures to address the problem. If the electric water pump runs dry during power-on, especially without antifreeze or other necessary working fluids, the bearings inside will operate in a "dry running" state due to the lack of lubrication and cooling, which can easily cause overheating, wear, or even damage.

[0084] Further, in any of the above embodiments, the method includes:

[0085] In sub-step S11, if the electronic water pump meets the power-on detection conditions, the motor of the electronic water pump that is in the power-on state will operate at the power-on speed specified in the motor speed request.

[0086] In this embodiment of the invention, the control system of the electronic water pump can first control the motor of the electronic water pump to power on and run at the power-on speed specified in the motor speed request, and confirm that the electronic water pump is in a powered-on state. Then, the control system of the electronic water pump can determine whether the powered-on electronic water pump meets the power-on detection conditions. If the power-on detection conditions are met, that is, the power-on speed specified in the motor speed request is not less than the power-on detection speed, the control system of the electronic water pump can detect the power-on current of the motor of the electronic water pump. The control system of the electronic water pump can maintain the motor in a state of power-on operation at the power-on speed specified in the motor speed request and perform no-load detection on the electronic water pump.

[0087] In this embodiment of the invention, if the electronic water pump meets the power-on detection conditions, the motor of the electronic water pump is kept in a state of power-on operation at the power-on speed specified by the motor speed request. The electronic water pump is then tested for no-load operation, ensuring that the control system of the electronic water pump can detect the power-on current of the motor. This achieves the detection of whether the electronic water pump is running without load during the power-on state, avoiding the problem of not detecting the no-load operation of the electronic water pump during the power-on process and not taking measures to solve the no-load failure, which can easily lead to overheating, wear or even damage of the bearing.

[0088] Further, in any of the above embodiments, step 105 includes:

[0089] Sub-step S21: Obtain the power-on current of the motor and determine whether the power-on current is less than the preset no-load current;

[0090] Sub-step S22: If the duration for which the power-on current is less than the preset idling current within the first preset time period reaches the first preset time threshold, then the electronic water pump is confirmed to be idling.

[0091] In this embodiment of the invention, when the motor of the electronic water pump is in a state of power-on operation according to the power-on detection speed, or in a state of power-on operation according to the power-on speed specified by the motor speed request, the power-on current of the motor is acquired, and it is determined whether the power-on current is less than the preset no-load current. If, within a first preset time period, the duration for which the power-on current is less than the preset no-load current reaches a first preset time period threshold, then it is confirmed that the electronic water pump in the power-on state is running idle.

[0092] In a specific example, the first preset time period can be 3 seconds, the first preset duration threshold can be 2 seconds, and the preset idling current can be 0.55A. If the electric water pump motor is in a state of power-on operation according to the power-on detection speed, or in a state of power-on operation according to the power-on speed specified by the motor speed request, and the power-on current of the electric water pump motor meets the requirement that the cumulative power-on current for 2 seconds within 3 seconds is less than 0.55A, then the electric water pump in the power-on state is confirmed to be idling.

[0093] In this embodiment of the invention, when the electronic water pump is powered on, the power-on current of the motor is acquired, and it is determined whether the power-on current is less than the preset no-load current. If the duration for which the power-on current is less than the preset no-load current reaches a first preset time threshold within a first preset time period, it is confirmed that the electronic water pump is running idle. This realizes the determination of whether the electronic water pump is running idle when powered on, and avoids the problem of the electronic water pump running idle during the power-on process, which may damage the bearing.

[0094] Furthermore, in any of the above embodiments, the working state further includes a running state; the method includes:

[0095] Sub-step S31: When the working state of the electronic water pump is the running state, obtain the running speed and running current of the motor;

[0096] Sub-step S32: If the operating speed of the motor meets the idling damage condition of the electronic water pump, then determine whether the operating current is less than the preset idling current.

[0097] Sub-step S33: If the duration for which the operating current is less than the preset idling current reaches a second preset duration threshold within the second preset time period, then the electronic water pump is confirmed to be idling.

[0098] In this embodiment of the invention, the operating states of the electronic water pump include a power-on state and a running state. After the power-on process of the electronic water pump is completed, the electronic water pump enters the running state.

[0099] When the electronic water pump is in operation, the operating speed and operating current of the pump motor are acquired. If the operating speed of the pump motor does not meet the idling damage condition, the pump will not be damaged when idling at that speed. The idling damage condition can be that the operating speed of the pump motor is not less than the idling damage speed. If the motor speed is less than the idling damage speed, the pump will not be damaged when idling at that speed. If the motor speed is not less than the idling damage speed, the pump will be damaged when idling at that speed. Specifically, the idling damage speed can be 2500 rpm, 3000 rpm, 3500 rpm, etc., and this invention does not limit this.

[0100] In this embodiment of the invention, if the operating speed of the motor of the electronic water pump meets the conditions for idling damage to the electronic water pump, the control system of the electronic water pump can determine whether the operating current of the motor is less than the preset idling current. If, within a second preset time period, the duration for which the operating current of the motor is less than the preset idling current reaches a second preset time threshold, then the control system of the electronic water pump confirms that the electronic water pump is idling.

[0101] In a specific example, the idle speed is 3000 rpm, the second preset time period can be 3 seconds, the second preset duration threshold can be 2 seconds, and the preset idle current can be 0.55A. When the electric water pump is in the running state, if the motor's running speed is not less than 3000 rpm, it is determined whether the electric water pump is idling. If the electric water pump motor's running current meets the requirement that the cumulative running current within 3 seconds (2 seconds) is less than 0.55A, then the electric water pump control system confirms that the electric water pump is idling.

[0102] In this embodiment of the invention, when the electronic water pump is in the running state, the motor's operating speed and operating current are acquired. If the motor's operating speed meets the conditions for the electronic water pump to idle and fail, it is determined whether the operating current is less than a preset idling current. If, within a second preset time period, the duration for which the operating current is less than the preset idling current reaches a second preset time threshold, then the electronic water pump is confirmed to be idling. This avoids the practice of determining that the electronic water pump is idling simply based on the operating current exceeding the normal current value, thereby reducing the problem of false alarms of idling faults caused by air bubbles in the electronic water pump leading to an increase in the motor's operating current, and achieving more accurate detection of whether the electronic water pump is idling.

[0103] Furthermore, in any of the above embodiments, the method further includes:

[0104] Sub-step S41: If the electronic water pump is running idle, try to restart the electronic water pump to change the idle electronic water pump to a normal state;

[0105] Sub-step S42: Record the number of times the electronic water pump is restarted;

[0106] Sub-step S43: If the number of restarts reaches a preset threshold and the idling electronic water pump does not return to the normal state, then control the electronic water pump to stop operating.

[0107] In sub-step S44, the idling fault information of the electronic water pump is sent to the vehicle control unit.

[0108] In this embodiment of the invention, if the control system of the electric water pump confirms that the electric water pump is running idle, the control system will not immediately send the idle fault information to the vehicle control unit. The control system can first attempt to restart the electric water pump to try to bring it back to a normal state. The control system can control the electric water pump to restart multiple times and record the number of restarts. If the number of restarts reaches a preset threshold, and none of the restarts have brought the idle water pump back to a normal state, then the control system stops the electric water pump and sends the idle fault information to the vehicle control unit. The vehicle control unit can receive and analyze the idle fault information. The preset threshold can be 15, 20, or 25 times, etc., and this invention does not limit this.

[0109] In this embodiment of the invention, if the electronic water pump is running idle, an attempt is made to restart the electronic water pump to bring it back to a normal state. The number of restarts of the electronic water pump is recorded. If the number of restarts reaches a preset threshold and the idle electronic water pump has not returned to a normal state, the electronic water pump is stopped to prevent further damage. The idle fault information of the electronic water pump is sent to the vehicle control unit. This achieves the goal of not immediately sending idle fault information to the vehicle control unit after detecting idle phenomenon, but first attempting to restart the electronic water pump. If the number of restarts reaches the preset threshold and the electronic water pump fails to return to a normal state, then the idle fault information will be transmitted to the vehicle control unit. This reduces false alarms of electronic water pump idle faults caused by occasional factors and improves the accuracy and reliability of electronic water pump idle detection.

[0110] Further, in any of the above embodiments, sub-step S41 includes:

[0111] Sub-step S51: If the electronic water pump is running dry, attempt to restart the electronic water pump and control the motor of the electronic water pump to run at a preset restart speed;

[0112] In sub-step S52, during the process of the motor running at the preset restart speed, it is determined whether the electronic water pump is running dry based on the operating current of the motor.

[0113] In this embodiment of the invention, if the control system of the electronic water pump confirms that the electronic water pump is running dry, the control system can attempt to restart the electronic water pump to try to bring it back to a normal state. After the electronic water pump restarts and enters the running state, the control system can control the motor of the electronic water pump to run at a preset restart speed. The preset restart speed is not less than the speed at which the pump would fail due to dry running.

[0114] During the operation of the motor at the preset restart speed, the control system of the electronic water pump needs to determine whether the electronic water pump is running dry. If, within a second preset time period, the operating current of the motor running at the preset restart speed is less than the preset idling current for a duration that reaches a second preset time threshold, then the control system of the electronic water pump confirms that the electronic water pump is running dry.

[0115] In this embodiment of the invention, if the electronic water pump is running dry, an attempt is made to restart the electronic water pump and control the motor of the electronic water pump to run at a preset restart speed. During the process of the motor running at the preset restart speed, the running current of the motor is used to determine whether the electronic water pump is running dry. This realizes the solution of the electronic water pump running dry due to occasional factors by restarting, as well as the determination of whether the restarted electronic water pump is running dry.

[0116] Furthermore, in any of the above embodiments, if the electronic water pump is idling while the motor is running at the preset restart speed, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

[0117] In this embodiment of the invention, if the control system of the electronic water pump confirms that the electronic water pump is running idle, the control system can attempt to restart the electronic water pump to try to bring it back to a normal state. After the electronic water pump restarts and enters the running state, the control system can control the motor of the electronic water pump to run at a preset restart speed. The preset restart speed is not less than the idle failure speed. Furthermore, during the operation of the motor at the preset restart speed, if the electronic water pump is running idle, the difference between the motor's operating current and the preset idle current is greater than a preset threshold, i.e., the difference between the motor's operating current and the preset idle current is large.

[0118] In a specific example, the motor's preset no-load current is 0.55A. When the motor is running at the preset restart speed of 4000 rpm, if the electric water pump is running idle, the motor's operating current is 0.3A. When the motor is running at the preset restart speed of 3000 rpm, if the electric water pump is running idle, the motor's operating current is 0.5A. The difference between 0.55A and 0.3A is larger than the difference between 0.55A and 0.5A. After the electric water pump restarts, if the motor runs at the preset restart speed of 4000 rpm, the electric water pump control system is less likely to experience false alarms about the electric water pump running idle.

[0119] In this embodiment of the invention, when the motor is running at a preset restart speed, if the electronic water pump is running dry, the difference between the motor's operating current and the preset dry current is greater than a preset threshold, which increases the difference between the operating current of the electronic water pump when it is running dry and the preset dry current, thus reducing the problem of false alarms for dry running faults of the electronic water pump.

[0120] Reference Figure 2 The diagram illustrates a flowchart of another method for detecting the idling of a vehicle electronic water pump according to an embodiment of the present invention, which may specifically include the following steps:

[0121] Step 201: Run the test.

[0122] When the electronic water pump is in the running state, the motor's operating speed and operating current are obtained.

[0123] Step 202: Determine if the water pump motor's operating speed is not less than 3000 rpm. If yes, proceed to step 203; otherwise, skip the no-load test.

[0124] The control system of the electric water pump determines whether the motor's operating speed is not less than the no-load damage speed. If the motor's operating speed is less than the no-load damage speed, the electric water pump will not be damaged when running at that operating speed, and no no-load damage assessment is performed. If the motor's operating speed is not less than the no-load damage speed, the electric water pump will be damaged when running at that operating speed. Specifically, the no-load damage speed can be 3000 rpm.

[0125] Step 203: Determine if the operating current is less than 0.55A (accumulated for more than 2 seconds within 3 seconds). If yes, proceed to step 204.

[0126] If, within the second preset time period, the duration for which the motor's operating current is less than the preset idling current reaches a second preset time threshold, then the electronic water pump's control system confirms that the electronic water pump is idling. The second preset time period can be 3 seconds, the second preset time threshold can be 2 seconds, and the preset idling current can be 0.55A.

[0127] Step 204: Trigger idling and enter restart logic.

[0128] If the control system of the electric water pump confirms that the electric water pump is running dry, the control system can try to restart the electric water pump in an attempt to bring the running dry electric water pump back to normal operation.

[0129] Step 205: Adjust the water pump speed to 3200 rpm.

[0130] After the electric water pump restarts and enters its operating state, the control system can control the pump motor to run at a preset restart speed. If the pump idles during this process, the difference between the motor's operating current and the preset idle current will exceed a preset threshold. The preset restart speed can be 3200 rpm.

[0131] Step 206: Determine if the operating current is less than 0.55A (accumulated for more than 2 seconds within 3 seconds). If yes, proceed to step 207.

[0132] During the operation of the motor at the preset restart speed, the control system of the electronic water pump needs to determine whether the electronic water pump is running dry. If, within a second preset time period, the operating current of the motor running at the preset restart speed is less than the preset idling current for a duration that reaches a second preset time threshold, then the control system of the electronic water pump confirms that the electronic water pump is running dry.

[0133] Step 207: Increment the restart count by one.

[0134] Step 208: Has the cumulative number of restarts reached 20? If not, proceed to step 205. If yes, proceed to step 209.

[0135] If the electric water pump has not been restarted enough to reach the preset threshold, it can be restarted again to attempt to bring it back to normal operation. The preset threshold can be 20 restarts.

[0136] Step 209: The water pump stops and an idling fault is reported.

[0137] If the number of restarts of the electronic water pump reaches the preset threshold, and none of the restarts have brought the idling electronic water pump back to normal operation, then the electronic water pump will be stopped, and the idling fault information of the electronic water pump will be sent to the vehicle control unit.

[0138] Reference Figure 3 The diagram illustrates a flowchart of another method for detecting the idling of a vehicle electronic water pump according to an embodiment of the present invention, which may specifically include the following steps:

[0139] Step 301, Power-on test.

[0140] Step 302: Check if the specified power-on speed of the water pump motor is not less than 3500 rpm. If not, adjust the power-on speed of the water pump to 3500 rpm for power-on operation. If yes, proceed to step 303.

[0141] The system receives a motor speed request for the electronic water pump from the preset vehicle control unit. If the requested power-on speed is lower than the power-on detection speed, the electronic water pump control system cannot detect the power-on current of the motor and controls the motor to operate at the power-on detection speed. If the requested power-on speed is not lower than the power-on detection speed, the motor, which remains powered on, operates at the requested power-on speed. The power-on detection speed can be 3500 rpm.

[0142] Step 303: Determine if the power-on current is less than 0.55A (cumulative for more than 2 seconds within 3 seconds). If yes, proceed to step 307. If no, the water pump is normal.

[0143] The system acquires the motor's power-on current and determines whether it is less than a preset no-load current. If, within a first preset time period, the duration for which the power-on current is less than the preset no-load current reaches a first preset time threshold, then the electronic water pump is confirmed to be running no-load. The first preset time period can be 3 seconds, the first preset time threshold can be 2 seconds, and the preset no-load current can be 0.55A.

[0144] Step 304: Run the test.

[0145] When the electronic water pump is in the running state, the motor's operating speed and operating current are obtained.

[0146] Step 305: Determine if the water pump motor's operating speed is not less than 3000 rpm. If yes, proceed to step 306; otherwise, skip the no-load test.

[0147] The control system of the electric water pump determines whether the motor's operating speed is not less than the no-load damage speed. If the motor's operating speed is less than the no-load damage speed, the electric water pump will not be damaged when running at that operating speed, and no no-load damage assessment is performed. If the motor's operating speed is not less than the no-load damage speed, the electric water pump will be damaged when running at that operating speed. Specifically, the no-load damage speed can be 3000 rpm.

[0148] Step 306: Determine if the operating current is less than 0.55A (cumulatively more than 2 seconds within 3 seconds). If yes, proceed to step 307. If no, the water pump is normal.

[0149] If, within the second preset time period, the duration for which the motor's operating current is less than the preset idling current reaches a second preset time threshold, then the electronic water pump's control system confirms that the electronic water pump is idling. The second preset time period can be 3 seconds, the second preset time threshold can be 2 seconds, and the preset idling current can be 0.55A.

[0150] Step 307 triggers idling and enters the restart logic.

[0151] If the control system of the electric water pump confirms that the electric water pump is running dry, the control system can try to restart the electric water pump in an attempt to bring the running dry electric water pump back to normal operation.

[0152] Step 308: Adjust the water pump speed to 4000 rpm.

[0153] After the electric water pump restarts and enters its operating state, the control system can control the pump motor to run at a preset restart speed. During this operation, if the pump idles, the difference between the motor's operating current and the preset idle current will exceed a preset threshold. The preset restart speed can be 4000 rpm.

[0154] Step 309: Determine if the operating current is less than 0.55A (cumulatively more than 2 seconds within 3 seconds). If yes, proceed to step 310. If no, the water pump is normal.

[0155] During the operation of the motor at the preset restart speed, the control system of the electronic water pump needs to determine whether the electronic water pump is running dry. If, within a second preset time period, the operating current of the motor running at the preset restart speed is less than the preset idling current for a duration that reaches a second preset time threshold, then the control system of the electronic water pump confirms that the electronic water pump is running dry.

[0156] Step 310: Increment the restart count by one.

[0157] Step 311: Has the cumulative number of restarts reached 20? If not, proceed to step 308. If yes, proceed to step 312.

[0158] If the electric water pump has not been restarted enough to reach the preset threshold, it can be restarted again to attempt to bring it back to normal operation. The preset threshold can be 20 restarts.

[0159] Step 312: The water pump stops and an idling fault is reported.

[0160] If the number of restarts of the electronic water pump reaches the preset threshold, and none of the restarts have brought the idling electronic water pump back to normal operation, then the electronic water pump will be stopped, and the idling fault information of the electronic water pump will be sent to the vehicle control unit.

[0161] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0162] Reference Figure 4 This diagram illustrates a structural block diagram of a vehicle electronic water pump idling detection device provided in an embodiment of the present invention. The device is applied to the control system of the electronic water pump and may specifically include the following modules:

[0163] The motor speed request acquisition module 401 is used to acquire the motor speed request of the electronic water pump sent by the preset vehicle control unit;

[0164] The first power-on operation module 402 is used to control the motor of the electronic water pump to power on and run at the specified power-on speed if the specified power-on speed of the motor speed request meets the preset power-on conditions, and to determine that the working state of the electronic water pump is the power-on state.

[0165] The power-on detection condition judgment module 403 is used to determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions based on the power-on speed.

[0166] The second power-on operation module 404 is used to control the motor of the power-on electronic water pump to operate at a preset power-on detection speed if the electronic water pump does not meet the power-on detection conditions.

[0167] The holding module 405 is used to keep the electronic water pump in the powered-on state and to perform no-load detection on the electronic water pump.

[0168] In an optional embodiment of the present invention, the device includes:

[0169] The third power-on operation module is used to, if the electronic water pump meets the power-on detection conditions, maintain the power-on state and then operate the motor of the electronic water pump at the power-on speed specified in the motor speed request.

[0170] In an optional embodiment of the present invention, the holding module includes:

[0171] The acquisition submodule is used to acquire the power-on current of the motor and determine whether the power-on current is less than the preset no-load current.

[0172] The confirmation submodule is used to confirm that the electronic water pump is idling if the duration for which the power-on current is less than the preset idling current reaches a first preset duration threshold within a first preset time period.

[0173] In an optional embodiment of the present invention, the working state further includes an operating state; the device includes:

[0174] The acquisition module is used to acquire the operating speed and operating current of the motor when the electronic water pump is in the operating state.

[0175] The judgment module is used to determine whether the operating current is less than the preset no-load current if the operating speed of the motor meets the no-load damage condition of the electronic water pump.

[0176] The idling confirmation module is used to confirm that the electronic water pump is idling if the operating current is less than the preset idling current for a duration that reaches a second preset duration threshold within a second preset time period.

[0177] In an optional embodiment of the present invention, the device further includes:

[0178] The restart module is used to attempt to restart the electronic water pump if it is running idle, so as to change the idle electronic water pump to a normal state.

[0179] A recording module is used to record the number of times the electronic water pump is restarted;

[0180] The stop operation control module is used to control the electronic water pump to stop operating if the number of restarts reaches a preset threshold and the idling electronic water pump has not returned to the normal state.

[0181] The transmitting module is used to send the idling fault information of the electronic water pump to the vehicle control unit.

[0182] In an optional embodiment of the present invention, the restart module includes:

[0183] The restart submodule is used to attempt to restart the electronic water pump if it is running idle, and to control the motor of the electronic water pump to run at a preset restart speed.

[0184] The judgment submodule is used to determine whether the electronic water pump is running dry based on the motor's operating current during the process of the motor running at the preset restart speed.

[0185] In an optional embodiment of the present invention, if the electronic water pump is idling while the motor is running at the preset restart speed, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

[0186] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0187] In addition, embodiments of the present invention also provide an electronic device, such as... Figure 5 As shown, it includes a processor 501, a communication interface 502, a memory 503, and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504.

[0188] Memory 503 is used to store computer programs;

[0189] When processor 501 executes the program stored in memory 503, it performs the following steps:

[0190] Obtain the motor speed request of the electronic water pump sent by the preset vehicle control unit;

[0191] If the specified power-on speed of the motor speed request meets the preset power-on conditions, then the motor of the electronic water pump is controlled to power on and run according to the power-on speed, and the working state of the electronic water pump is determined to be the power-on state.

[0192] Based on the power-on speed, determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions;

[0193] If the electronic water pump does not meet the power-on detection conditions, the motor of the electronic water pump in the power-on state is controlled to run at the preset power-on detection speed.

[0194] While keeping the electronic water pump in the powered-on state, perform an idle test on the electronic water pump.

[0195] In an optional embodiment of the present invention, the method includes:

[0196] If the electronic water pump meets the power-on detection conditions, the motor of the electronic water pump that remains in the powered-on state will operate at the power-on speed specified in the motor speed request.

[0197] In an optional embodiment of the present invention, the step of keeping the electronic water pump in the powered-on state and performing an idle detection on the electronic water pump includes:

[0198] Obtain the power-on current of the motor and determine whether the power-on current is less than the preset no-load current;

[0199] If, within a first preset time period, the duration for which the power-on current is less than the preset idling current reaches a first preset time threshold, then the electronic water pump is confirmed to be idling.

[0200] In an optional embodiment of the present invention, the working state further includes a running state; the method includes:

[0201] When the electronic water pump is in the operating state, the operating speed and operating current of the motor are obtained;

[0202] If the operating speed of the motor meets the idling failure condition of the electronic water pump, then determine whether the operating current is less than the preset idling current;

[0203] If, within the second preset time period, the duration for which the operating current is less than the preset idling current reaches the second preset time threshold, then the electronic water pump is confirmed to be idling.

[0204] In an optional embodiment of the present invention, the method further includes:

[0205] If the electronic water pump is running idle, try restarting the electronic water pump to bring it back to normal operation.

[0206] Record the number of times the electronic water pump is restarted;

[0207] If the number of restarts reaches a preset threshold and the idling electronic water pump fails to return to the normal state, then the electronic water pump is controlled to stop operating.

[0208] The information about the idling fault of the electronic water pump is sent to the vehicle control unit.

[0209] In an optional embodiment of the present invention, the step of attempting to restart the electronic water pump if it is running idle, and returning the idle electronic water pump to a normal state, includes:

[0210] If the electronic water pump is running dry, try to restart the electronic water pump and control the motor of the electronic water pump to run at the preset restart speed;

[0211] During the operation of the motor at the preset restart speed, the electronic water pump is determined to be running dry based on the motor's operating current.

[0212] In an optional embodiment of the present invention, if the electronic water pump is idling while the motor is running at the preset restart speed, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

[0213] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0214] The communication interface is used for communication between the aforementioned terminal and other devices.

[0215] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0216] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0217] like Figure 6 As shown, in another embodiment of the present invention, a computer-readable storage medium 601 is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the idling detection method for a vehicle electronic water pump described in the above embodiment.

[0218] In another embodiment of the present invention, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute the idling detection method for a vehicle electronic water pump described in the above embodiment.

[0219] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0220] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0221] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0222] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for detecting the idling of a vehicle's electronic water pump, characterized in that, A control system applied to an electronic water pump, the method comprising: Obtain the motor speed request of the electronic water pump sent by the preset vehicle control unit; If the specified power-on speed of the motor speed request meets the preset power-on conditions, then the motor of the electronic water pump is controlled to power on and run at the specified power-on speed, and the working state of the electronic water pump is determined to be the power-on state; the working state also includes the running state; Based on the power-on speed, it is determined whether the electronic water pump in the power-on state meets the preset power-on detection conditions; the power-on detection conditions are that the power-on speed is not less than the preset power-on detection speed; the power-on detection conditions are conditions that enable the power-on current of the electronic water pump to be acquired. If the electronic water pump does not meet the power-on detection conditions, the motor of the electronic water pump in the power-on state is controlled to run at the preset power-on detection speed. Keeping the electronic water pump in the powered-on state, perform an idle test on the electronic water pump; When the electronic water pump is in the operating state, the operating speed of the motor is obtained; Based on the operating speed, it is determined whether the operating speed of the motor meets the idling damage condition of the electronic water pump; the idling damage condition is that the operating speed is not less than the preset idling damage speed.

2. The method according to claim 1, characterized in that, The method includes: If the electronic water pump meets the power-on detection conditions, the motor of the electronic water pump that remains in the powered-on state will operate at the power-on speed specified in the motor speed request.

3. The method according to claim 2, characterized in that, The step of keeping the electronic water pump in the powered-on state and performing an idle test on the electronic water pump includes: Obtain the power-on current of the motor and determine whether the power-on current is less than the preset no-load current; If, within a first preset time period, the duration for which the power-on current is less than the preset idling current reaches a first preset time threshold, then the electronic water pump is confirmed to be idling.

4. The method according to claim 3, characterized in that, The method includes: When the electronic water pump is in the operating state, the operating current of the motor is obtained; If the operating speed of the motor meets the idling failure condition of the electronic water pump, then determine whether the operating current is less than the preset idling current; If, within the second preset time period, the duration for which the operating current is less than the preset idling current reaches the second preset time threshold, then the electronic water pump is confirmed to be idling.

5. The method according to claim 3 or 4, characterized in that, The method further includes: If the electronic water pump is running idle, try restarting the electronic water pump to bring it back to normal operation. Record the number of times the electronic water pump is restarted; If the number of restarts reaches a preset threshold and the idling electronic water pump fails to return to the normal state, then the electronic water pump is controlled to stop operating. The information about the idling fault of the electronic water pump is sent to the vehicle control unit.

6. The method according to claim 5, characterized in that, The step of attempting to restart the electronic water pump if it is running idle, and returning the idle electronic water pump to a normal state, includes: If the electronic water pump is running dry, try to restart the electronic water pump and control the motor of the electronic water pump to run at the preset restart speed; During the operation of the motor at the preset restart speed, the electronic water pump is determined to be running dry based on the motor's operating current.

7. The method according to claim 6, characterized in that, During the operation of the motor at the preset restart speed, if the electronic water pump is idling, the difference between the motor's operating current and the preset idling current is greater than a preset threshold.

8. A device for detecting the dry run of a vehicle electronic water pump, characterized in that, A control system for an electronic water pump, the device comprising: The motor speed request acquisition module is used to acquire the motor speed request of the electronic water pump sent by the preset vehicle control unit; The first power-on operation module is used to control the motor of the electronic water pump to power on and run at the specified power-on speed if the specified power-on speed meets the preset power-on conditions, and to determine the working state of the electronic water pump as the power-on state; the working state also includes the running state. The power-on detection condition judgment module is used to determine whether the electronic water pump in the power-on state meets the preset power-on detection conditions based on the power-on speed; the power-on detection condition is that the power-on speed is not less than the preset power-on detection speed; the power-on detection condition is a condition that allows the power-on current of the electronic water pump to be acquired. The second power-on operation module is used to control the motor of the power-on electronic water pump to operate at a preset power-on detection speed if the electronic water pump does not meet the power-on detection conditions. A holding module is used to keep the electronic water pump in the powered-on state and to perform no-load detection on the electronic water pump; The operating speed acquisition module is used to acquire the operating speed of the motor when the electronic water pump is in the operating state. The idling damage condition judgment module is used to determine whether the operating speed of the motor meets the idling damage condition of the electronic water pump based on the operating speed; the idling damage condition is that the operating speed is not less than a preset idling damage speed.

9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; The memory is used to store computer programs; When the processor executes a program stored in the memory, it implements the method as described in any one of claims 1-7.

10. One or more computer-readable media having instructions stored thereon that, when executed by one or more processors, cause the processors to perform the method as described in any one of claims 1-7.

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