Electric actuator gear wear control method, device and electric actuator

Abstract

The present invention provides a method for controlling gear wear of an electric actuator, comprising: a method for controlling gear wear of an electric actuator, characterized in that it comprises: controlling the valve to run to a first mechanical stop position; controlling the valve to run according to a threshold of the number of revolutions of the motor, wherein the valve stop position is a detection position; judging whether the detection position is the same as the standard position; wherein, when the detection position is different from the standard position, judging that the electric actuator is in a first gear wear state; and when the detection position is the same as the standard position, judging that the electric actuator is normal. The embodiment of the present invention is used to detect the wear condition of the internal gear of the electric actuator.

Description

Technical Field

[0001] The present invention relates to the field of exhaust gas circulation systems for commercial vehicles, and in particular to a method for controlling gear wear of an electric actuator, a device for controlling gear wear of an electric actuator, and an electric actuator. Background Art

[0002] As environmental protection and energy conservation are increasingly valued, commercial vehicles will install exhaust gas circulation systems on their engines. When refueling suddenly, the fuel in the engine will not be completely burned, so that certain combustible substances will be mixed in the exhaust gas. At this time, the valve at the exhaust gas circulation system is controlled by the electric actuator to open, so that part of the exhaust gas enters the engine for re-combustion, which reduces exhaust pollution and recycles the exhaust gas, achieving an energy-saving effect.

[0003] Since the internal gears of the electric actuator will wear out when working for a long time, the control accuracy of the valve will decrease. If the worn electric actuator is used for a long time, the valve will be uncontrollable, posing a safety hazard. Summary of the invention

[0004] Therefore, an embodiment of the present invention provides a method for controlling gear wear of an electric actuator, which is used to detect the wear condition of internal gears of the electric actuator.

[0005] To solve the above problems, the present invention provides a method for controlling gear wear of an electric actuator, comprising: controlling the valve to run to a first mechanical stop position; controlling the operation of the valve according to a threshold value of the number of revolutions of the motor, and the valve stop position is a detection position; judging whether the detection position is the same as a standard position; wherein, when the detection position and the standard position are different, judging that the electric actuator is in a first gear wear state; and when the detection position and the standard position are the same, judging that the electric actuator is normal.

[0006] Compared with the prior art, the technical effect achieved by adopting this technical solution is: first control the valve to run to the specified position, and then control the valve to rotate through the threshold of the number of motor rotations, the valve stop position is the detection position, and then compare the detection position with the standard position. When the detection position and the standard position are different, it is judged that the electric actuator is in the first gear wear state; when the detection position and the standard position are the same, it is judged that the electric actuator is normal, thereby knowing whether the electric actuator is in the gear wear state, and the wear state of the electric actuator gear can be predicted in advance.

[0007] In one example of the present invention, it also includes: judging whether the angle between the detection position and the standard position is greater than a first preset angle difference α; wherein, when the angle between the detection position and the standard position is greater than the preset difference angle α, judging that the electric actuator is in the second gear wear state.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: since the wear of the output shaft or the error of the position detector may also cause a difference between the detected position and the standard position of the valve plate, in order to further understand the wear condition of the gear, the angle between the detected position and the standard position is compared with the first preset angle difference α. When the angle between the detected position and the standard position is greater than the preset difference angle α, the electric actuator is judged to be in the second gear wear state.

[0009] In one example of the present invention, it also includes: acquiring the running time of the electric actuator; when the running time of the electric actuator is greater than the first preset time t and the electric actuator is in the second gear wear state, the electric actuator enters the third gear wear state.

[0010] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: since there may be assembly errors or loose fit during the installation of the gears, the electric actuator enters the second gear wear state during detection, but at this time the electric actuator is still within the standard range of use and the gears are still in a relatively healthy state; however, long-term use of the electric actuator in this state causes great wear on the electric actuator gears, so when the running time of the electric actuator is greater than the first preset time t, and the electric actuator is in the second gear wear state, it is judged that the electric actuator enters the third gear wear state.

[0011] In an example of the present invention, when the electric actuator enters the third gear wear state, the electric actuator sends a maintenance signal.

[0012] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the electric actuator enters the third gear wear state, the gear wear state of the electric actuator is already working in a relatively serious state. Therefore, in order to prevent accidents, a maintenance signal is directly issued to notify the user to repair and replace the electric actuator.

[0013] In one example of the present invention, it also includes: judging whether the angle between the detection position and the standard position is greater than a second preset angle difference β; wherein, when the angle between the detection position and the standard position is greater than the second preset angle difference β, the electric actuator is forced to stop.

[0014] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the electric actuator gear is severely worn, it will cause the control of the valve to be out of control, posing a great safety hazard. Therefore, in order to prevent accidents, it is determined whether the angle between the detection position and the standard position is greater than the second preset angle difference β. When the angle between the detection position and the standard position is greater than the second preset angle difference β, the electric actuator is directly forced to shut down.

[0015] In one example of the present invention, when the electric actuator is in a first gear wear state, the electric actuator enters a self-calibration mode, and the self-calibration mode includes: controlling the valve to run to the first mechanical stop position; the motor controls the valve to run to a standard position; obtaining the first number of revolutions of the motor at this time; and recalibrating by comparing the first number of revolutions with the number of revolutions threshold.

[0016] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the electric actuator is in the first gear wear state, the gear wear of the electric actuator is less, but the control accuracy of the valve is reduced. Therefore, the electric actuator is put into self-calibration mode, and the other rotation parameters of the electric actuator are recalibrated by comparing the first number of turns with the number of turns threshold and the ratio between them, thereby improving the control accuracy of the valve.

[0017] In one example of the present invention, the standard position is the position where the motor rotates a threshold number of installed revolutions to control the valve to stop running from the first mechanical stop position when the electric actuator is used for the first time.

[0018] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: since there are differences between the parts of each electric actuator during installation, the standard position is not set to a fixed value, and the position where the valve stops running from the first mechanical stop position is determined according to the threshold of the number of motor rotations of each electric actuator, thereby improving the accuracy of subsequent judgments.

[0019] On the other hand, an embodiment of the present invention also provides an electric actuator gear wear control device, including: a judgment module for judging the relationship between a detection position and a standard position; an angle monitoring module for detecting the angle of valve rotation; and a control module for controlling the rotation of the valve and the motor.

[0020] On the other hand, an embodiment of the present invention provides an electric actuator, a packaged IC and a memory electrically connected to the packaged IC, the memory stores a computer program, and when the computer program is read and executed by the packaged IC, the electric actuator implements any one of the above-mentioned electric actuator gear wear control methods.

[0021] In yet another aspect, an embodiment of the present invention further provides a commercial vehicle, wherein the commercial vehicle has the electric actuator described in any one of the above embodiments.

[0022] After adopting the technical solution of the present invention, the following technical effects can be achieved:

[0023] (1) The valve is controlled to rotate according to the threshold of the number of revolutions of the motor. The stop position of the valve is the detection position. The detection position is then compared with the standard position to determine the wear condition of the gear inside the electric actuator.

[0024] (2) When the electric actuator is in the first gear wear state, the gear wear of the electric actuator is less, but the control accuracy of the valve is reduced. Therefore, the electric actuator is put into the self-calibration mode, and the other rotation parameters of the electric actuator are recalibrated to improve the control accuracy of the valve;

[0025] (3) Determining a standard position by controlling the valve to stop running from the first mechanical stop position according to a threshold value of the number of motor rotations of each electric actuator, thereby improving the accuracy of subsequent judgments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a flow chart of a method for controlling gear wear of an electric actuator provided in Embodiment 1 of the present invention.

[0028] Figure 2 for Figure 1 The specific flow chart of the electric actuator gear wear control method is shown in.

[0029] Figure 3 It is a structural schematic block diagram of a device for controlling wear of a gear of an electric actuator according to a second embodiment of the present invention;

[0030] Figure 4 is a block diagram of the electric actuator according to the third embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of a readable storage medium according to the fourth embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 100 is an electric actuator blocking gear wear control device; 110 is a judgment module; 120 is an angle monitoring module; 130 is a control module; 140 is a display module; 150 is an alarm module; 200 is an electric actuator; 210 is a memory; 211 is a computer program; 230 is a processor; 300 is a readable storage medium; 310 is a computer executable instruction. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] [First embodiment]

[0036] See also Figure 1 , is a flow chart of a method for controlling gear wear of an electric actuator provided in Embodiment 1 of the present invention. The method for controlling gear wear of an electric actuator specifically comprises:

[0037] Step S10, controlling the valve to run to a first mechanical stop position;

[0038] It should be noted that the control valve here needs to be operated to the first mechanical stop position under the premise that the electric actuator stops working, otherwise it will affect the electric actuator.

[0039] Step S20, the motor rotation number threshold controls the operation of the valve, and the valve stop position is the detection position;

[0040] Step S30, determining whether the detection position is the same as the standard position.

[0041] When the detection position and the standard position are different, the electric actuator is judged to be in a first gear wear state; when the detection position and the standard position are the same, the electric actuator is judged to be normal.

[0042] For example, the existing electric actuator will cause the gears inside the electric actuator to wear after long-term operation, resulting in a decrease in the control accuracy of the valve, or even the valve cannot be controlled, posing a safety hazard. Therefore, the valve is first controlled to run to a specified position, and then the valve is controlled to rotate according to the threshold of the number of motor rotations. The valve stop position is the detection position, and the detection position is then compared with the standard position. When the detection position and the standard position are different, the electric actuator is judged to be in the first gear wear state; when the detection position and the standard position are the same, the electric actuator is judged to be normal, thereby knowing whether the electric actuator is in a gear wear state, and the wear state of the electric actuator gear can be predicted in advance.

[0043] Preferably, the standard position is the position where the valve stops running from the first mechanical stop position when the electric actuator is used for the first time, when the motor rotates the installation number of revolutions. For example, since there are differences between the parts of each electric actuator during installation, the standard position is not set as a fixed value, but is determined according to the position where the valve stops running from the first mechanical stop position when each electric actuator rotates the installation number of revolutions according to the motor, thereby improving the accuracy of subsequent judgment.

[0044] For details, see Figure 2 The electric actuator gear wear control method, for example, also includes: determining whether the angle between the detection position and the standard position is greater than a first preset angle difference α; wherein, when the angle between the detection position and the standard position is greater than the preset difference angle α, the electric actuator is determined to be in a second gear wear state.

[0045] For example, due to the wear of the output shaft or the error of the position detector, there may be a difference between the detected position and the standard position of the valve plate. Therefore, in order to further understand the wear condition of the gear, the angle between the detected position and the standard position is compared with the first preset angle difference α. When the angle between the detected position and the standard position is greater than the preset difference angle α, the electric actuator is judged to be in the second gear wear state.

[0046] Preferably, when the electric actuator is in the first gear wear state, the electric actuator enters a self-calibration mode, and the self-calibration mode includes: controlling the valve to run to the first mechanical stop position; the motor controls the valve to run to the standard position; obtaining the first number of revolutions of the motor at this time; and recalibrating by comparing the first number of revolutions with the number of revolutions threshold.

[0047] For example, when the electric actuator is in the first gear wear state, the gear wear of the electric actuator is less, but the control accuracy of the valve is reduced. Therefore, the electric actuator is put into self-calibration mode, and the other rotation parameters of the electric actuator are recalibrated by comparing the first number of turns and the number of turns threshold through the ratio between them, thereby improving the control accuracy of the valve.

[0048] Specifically, the electric actuator gear wear control method also includes, for example: determining whether the angle between the detection position and the standard position is greater than a first preset angle difference α; wherein, when the angle between the detection position and the standard position is greater than the preset difference angle α, the electric actuator is determined to be in a second gear wear state.

[0049] For example, due to the wear of the output shaft or the error of the position detector, there may be a difference between the detected position and the standard position of the valve plate. Therefore, in order to further understand the wear condition of the gear, the angle between the detected position and the standard position is compared with the first preset angle difference α. When the angle between the detected position and the standard position is greater than the preset difference angle α, the electric actuator is judged to be in the second gear wear state.

[0050] Preferably, the electric actuator gear wear control method also includes, for example: obtaining the running time of the electric actuator; when the running time of the electric actuator is greater than a first preset time t and the electric actuator is in a second gear wear state, the electric actuator enters a third gear wear state.

[0051] For example, due to assembly errors or loose fit of the gears during installation, the electric actuator may enter the second gear wear state during detection. However, the electric actuator is still within the standard range of use and the gears are still in a relatively healthy state. However, long-term use of the electric actuator in this state will cause great wear on the electric actuator gears. Therefore, when the running time of the electric actuator is greater than the first preset time t, and the electric actuator is in the second gear wear state, it is determined that the electric actuator has entered the third gear wear state.

[0052] Preferably, the operating time of the electric actuator can also be obtained by periodically performing gear wear detection on the electric actuator. When the number of gear wear detections on the electric actuator exceeds a threshold number and the electric actuator is in the second gear wear state, the electric actuator enters the third gear wear state.

[0053] Preferably, when the electric actuator enters the third gear wear state, the electric actuator sends a maintenance signal. For example, when the electric actuator enters the third gear wear state, the gear wear state of the electric actuator is already in a relatively serious state, so in order to prevent accidents, a maintenance signal is directly sent to notify the user to repair and replace the electric actuator.

[0054] Specifically, the electric actuator gear wear control method also includes, for example: determining whether the angle between the detection position and the standard position is greater than a second preset angle difference β; wherein, when the angle between the detection position and the standard position is greater than the second preset angle difference β, the electric actuator is forced to shut down.

[0055] For example, when the electric actuator gear wears extremely severely, it will cause the control of the valve to be out of control, posing a major safety hazard. Therefore, in order to prevent accidents, it is determined whether the angle between the detection position and the standard position is greater than the second preset angle difference β. When the angle between the detection position and the standard position is greater than the second preset angle difference β, the electric actuator is directly forced to shut down.

[0056] [Second embodiment]

[0057] See also Figure 3 The embodiment of the present invention further provides an electric actuator gear wear control device 100. The electric actuator gear wear control device 100 includes, for example: a judgment module 110 for judging the relationship between the detection position and the standard position; an angle monitoring module 120 for detecting the angle of valve rotation; and a control module 130 for controlling the rotation of the valve and the motor.

[0058] Preferably, the electric actuator blocking gear wear control device 100 also includes: a display module 140, used to display that the electric actuator 200 is in a normal state or a first gear wear state or a second gear wear state or a third gear wear state or a shutdown state; an alarm module 150, used to prompt the user that the electric actuator 200 is in the third gear wear state.

[0059] In a specific embodiment, the judgment module 110, angle monitoring module 120, control module 130, display module 140 and alarm module 150 of the electric actuator gear wear control device 100 cooperate to implement the electric actuator gear wear control method as described in the first embodiment above, which will not be repeated here.

[0060] [Third embodiment]

[0061] An embodiment of the present invention further provides an electric actuator 200, comprising a readable storage medium storing a computer program and a packaged IC electrically connected to the readable storage medium. When the computer program is read and executed by the packaged IC, the electric actuator implements the electric actuator gear wear control method described in any of the above embodiments.

[0062] The packaged IC in this embodiment can be, for example, a processor chip, which is electrically connected to a computer-readable storage medium to read and execute the computer program. The packaged IC can also be a packaged circuit board, which is packaged with a processor chip that can read and execute the computer program; of course, the circuit board can also package a computer-readable storage medium.

[0063] Among them, the processor chip can also be provided with the electric actuator gear wear control device 100 as described in the second embodiment, and the processor chip can implement the electric actuator gear wear control method as described in the first embodiment through the electric actuator gear wear control device 100, which will not be repeated here.

[0064] [Fourth embodiment]

[0065] See also Figure 4 , which is a structural schematic diagram of an electric actuator 200 provided in the fourth embodiment of the present invention. The electric actuator 200, for example, includes a processor 230 and a memory 210 electrically connected to the processor 230. The memory 210 stores a computer program 211. The processor 230 loads the computer program 211 to implement the electric actuator gear wear control method as described in the first embodiment.

[0066] [Fifth embodiment]

[0067] See also Figure 5 This embodiment also provides a readable storage medium 300, which stores computer executable instructions 310. When the computer executable instructions 310 are read and executed by the processor, the electric actuator where the readable storage medium 300 is located is controlled to implement the electric actuator gear wear control method as described in the first embodiment.

[0068] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are only illustrative. For example, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0069] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned readable storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0070] [Sixth embodiment]

[0071] The embodiment of the present invention further provides a commercial vehicle, which includes the electric actuator 200 described in the third embodiment and / or the electric actuator 200 described in the fourth embodiment. The commercial vehicle is more efficient in treating exhaust gas, and the commercial vehicle is, for example, a bus or a truck.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling gear wear of an electric actuator, characterized in that: include: Control the valve to run to the first mechanical stop position; The threshold of the number of revolutions of the motor controls the operation of the valve, and the stop position of the valve is the detection position; Determining whether the detection position and the standard position are the same; Wherein, when the detection position and the standard position are different, it is judged that the electric actuator is in the first gear wear state; when the detection position and the standard position are the same, it is judged that the electric actuator is normal; Determine whether the angle between the detection position and the standard position is greater than a first preset angle difference α; Wherein, when the angle between the detection position and the standard position is greater than a preset difference angle α, it is determined that the electric actuator is in a second gear wear state; Obtaining the running time of the electric actuator; When the running time of the electric actuator is greater than the first preset time t and the electric actuator is in the second gear wear state, the electric actuator enters the third gear wear state; Since there may be assembly errors or loose fit during the installation of the gears, the electric actuator enters the second gear wear state during detection, but at this time the electric actuator is still within the standard range of use, that is, the gear is still in a healthy state; however, long-term use of the electric actuator in this state causes great wear on the electric actuator gears, so when the running time of the electric actuator is greater than the first preset time t, and the electric actuator is in the second gear wear state, it is determined that the electric actuator enters the third gear wear state; When the electric actuator enters the third gear wear state, the electric actuator sends a maintenance signal; Determine whether the angle between the detection position and the standard position is greater than a second preset angle difference β; Wherein, when the angle between the detection position and the standard position is greater than a second preset angle difference β, the electric actuator is forced to stop; When the electric actuator is in the first gear wear state, the electric actuator enters a self-calibration mode, and the self-calibration mode includes: Controlling the valve to run to the first mechanical stop position; The motor controls the valve to run to a standard position; Obtain the first number of revolutions of the motor at this time; Recalibration is performed by comparing the first number of revolutions with the number of revolutions threshold.

2. The electric actuator gear wear control method according to claim 1, characterized in that: The standard position is the position where the motor rotates the installation number of revolutions to control the valve to stop running from the first mechanical stop position when the electric actuator is used for the first time.

3. An electric actuator gear wear control device, characterized in that: Using the electric actuator gear wear control method according to any one of claims 1 to 2 comprises: A judgment module, used for judging the relationship between the detection position and the standard position; Angle monitoring module, used to detect the angle of valve rotation; Control module, used to control the rotation of valves and motors.

4. An electric actuator, characterized in that: A packaged IC and a memory electrically connected to the packaged IC, the memory storing a computer program, and when the computer program is read and executed by the packaged IC, the electric actuator implements the electric actuator gear wear control method as described in any one of claims 1-2.

5. A commercial vehicle, characterized in that: The commercial vehicle has an electric actuator as claimed in claim 4 .

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