CN117895738B - Vibration motor and displacement testing method thereof - Google Patents
Vibration motor and displacement testing method thereof Download PDFInfo
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- CN117895738B CN117895738B CN202410302286.2A CN202410302286A CN117895738B CN 117895738 B CN117895738 B CN 117895738B CN 202410302286 A CN202410302286 A CN 202410302286A CN 117895738 B CN117895738 B CN 117895738B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 130
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- 230000008859 change Effects 0.000 claims description 18
- 230000004044 response Effects 0.000 claims description 5
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Abstract
The embodiment of the application relates to the field of motors, and provides a vibration motor and a displacement testing method of the vibration motor, comprising the following steps: a housing having an accommodation space therein; the stator is arranged in the accommodating space and is fixed with the bottom surface of the shell; the vibrator is suspended in the accommodating space, the vibrator is provided with a through hole penetrating the vibrator along the direction perpendicular to the bottom surface of the shell, the stator is positioned in the through hole, and the vibrator can reciprocate relative to the stator along a first direction parallel to the bottom surface of the shell; the capacitor assembly comprises a first polar plate and a second polar plate, and is arranged on the shell, the stator or the vibrator; and the control feedback module is used for detecting the capacitance value of the capacitance component and calculating the reciprocating motion state of the vibrator relative to the stator along the first direction based on the capacitance value. The vibration motor and the displacement testing method of the vibration motor are at least beneficial to improving the reliability of the vibration motor.
Description
Technical Field
The embodiment of the application relates to the field of motors, in particular to a vibration motor and a displacement testing method of the vibration motor.
Background
The main principle of the vibration motor is that the vibrator is utilized to vibrate in the motor to drive the whole equipment or a partial area of the equipment provided with the vibration motor to vibrate, so that better use and feedback experience are brought to users.
The high-voltage driving chip and the scheme of specific vibration waveform are adopted to drive the vibration motor, so that strong vibration sense is brought, and meanwhile, the displacement of the vibrator in the motor cannot be measured and controlled. In operation, the motor can collide with the inner wall of the shell when vibration reaches the limit position, so that the motor structure is damaged, and the service life of the motor is greatly reduced.
Disclosure of Invention
The embodiment of the application provides a vibration motor and a displacement testing method of the vibration motor, which are at least beneficial to improving the reliability of the vibration motor.
According to some embodiments of the present application, an aspect of an embodiment of the present application provides a vibration motor, including: a housing having an accommodation space therein; the stator is arranged in the accommodating space and is fixed with the bottom surface of the shell; the vibrator is suspended in the accommodating space, the vibrator is provided with a through hole penetrating the vibrator along the direction perpendicular to the bottom surface of the shell, the stator is positioned in the through hole, and the vibrator can reciprocate relative to the stator along a first direction parallel to the bottom surface of the shell; the capacitor assembly comprises a first polar plate and a second polar plate, and is arranged on the shell, the stator or the vibrator; and the control feedback module is used for detecting the capacitance value of the capacitance component and calculating the reciprocating motion state of the vibrator relative to the stator along the first direction based on the capacitance value.
In some embodiments, the first plate is fixed to one side surface of the stator in the first direction; the second pole plate is fixed on the inner wall of the through hole of the vibrator.
In some embodiments, the first polar plate is fixed to an inner wall of the through hole of the vibrator on one side along the second direction, and the second polar plate is fixed to an inner wall of the through hole of the vibrator on the other side along the second direction, and the second direction is parallel to the bottom surface of the shell and intersects the first direction.
In some embodiments, the first polar plate is fixed to an outer wall of the vibrator on one side along a second direction, and the second polar plate is fixed to an inner wall of the housing, and the second direction is parallel to the bottom surface of the housing and intersects the first direction.
In some embodiments, the first polar plate is fixed on the top surface of the vibrator, and the second polar plate is fixed on the top inner wall of the shell; and/or the first polar plate is fixed on the bottom surface of the vibrator, and the second polar plate is fixed on the bottom inner wall of the shell.
In some embodiments, further comprising: and the circuit board is fixed on the top inner wall or the bottom inner wall of the shell, and the second pole plate is integrated in the circuit board.
In some embodiments, further comprising: the elastic component comprises a first spring and a second spring, one end of the first spring is fixed with one side wall of the vibrator along the second direction, and the other end of the first spring is fixed with the inner wall of the shell; one end of the second spring is fixed with the other side wall of the vibrator along the second direction, the other end of the second spring is fixed with the inner wall of the shell, and the vibrator is suspended in the accommodating space through the elastic component.
In some embodiments, the vibrator includes a mass having a through hole penetrating the mass in a direction perpendicular to a bottom surface of the case, and magnets provided at least on inner walls of the through hole on opposite sides in the first direction.
According to some embodiments of the present application, another aspect of the embodiments of the present application further provides a displacement testing method of a vibration motor, including: providing an initial vibration signal; the initial vibration signal is adjusted by adopting an initial displacement protection model to obtain an adjusted vibration signal, and if the stator responds to the initial vibration signal to generate current or voltage change, the vibrator generates first displacement; if the stator responds to the adjustment vibration signal to generate current or voltage change, the vibrator generates second displacement, and the second displacement is smaller than or equal to the first displacement; inputting an adjusting vibration signal to the vibration motor, and generating current or voltage change by the stator in response to the adjusting vibration signal so as to enable the vibrator to vibrate; acquiring actual displacement parameters of the vibrator according to the capacitor assembly, wherein the actual displacement parameters are expressed as actual displacement of the vibrator relative to a static state in a vibration process; and adjusting the initial displacement protection model according to the actual displacement parameters to obtain a target displacement protection model, wherein the target displacement protection model is used for adjusting a vibration signal input to the vibration motor.
In some embodiments, adjusting the initial vibration signal using the initial displacement protection model includes: comparing the initial parameters corresponding to the initial vibration signals with preset parameters, and if the initial parameters are higher than the preset parameters, reducing the initial parameters to obtain adjustment parameters, wherein the vibration signals corresponding to the adjustment parameters are used as adjustment vibration signals; and if the initial parameter is smaller than or equal to the preset parameter, taking the initial vibration signal as an adjustment vibration signal.
The technical scheme provided by the embodiment of the application has at least the following advantages:
In the vibration motor provided by the embodiment of the application, the stator and the vibrator are arranged in the shell, the vibrator is provided with the through hole penetrating through the vibrator along the direction perpendicular to the bottom surface of the shell, the stator is arranged in the through hole, and the vibrator can reciprocate relative to the stator along the first direction so as to drive the whole equipment or a partial area of the equipment provided with the vibration motor to vibrate. The control feedback module can detect the capacitance value of the capacitance component, calculate the reciprocating motion state of the vibrator along the first direction in real time relative to the stator based on the capacitance value, and further judge whether the vibration of the vibrator exceeds the upper limit of displacement. The control feedback module can also feed back the vibration state of the vibrator to the signal input end of the vibration motor, and the signal input end can adjust corresponding input signal parameters in real time according to the actual vibration state of the vibrator so as to avoid the situation that the vibrator is crust breaking during vibration, and further improve the reliability of the vibration motor.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically indicated otherwise; in order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural diagram of a vibration motor according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a capacitor assembly disposed on a stator and a vibrator of a vibration motor according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of a capacitor assembly disposed on a vibrator of a vibration motor according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a capacitor assembly disposed on a vibrator and a casing of a vibration motor according to an embodiment of the present application;
FIG. 5 is a schematic view of another structure of a vibrator and a casing of a vibration motor according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a capacitive component disposed on a circuit board and a vibrator of a vibration motor according to an embodiment of the present application;
FIG. 7 is a schematic diagram of another vibration motor according to an embodiment of the present application;
Fig. 8 is a flowchart corresponding to a displacement testing method of a vibration motor according to an embodiment of the present application.
Detailed Description
The vibration motor is an electric-vibration transducer, its working principle is that the current is fed into the coil of vibration motor, and interacted with the magnetic field of magnetic steel to produce thrust or suction force so as to push the vibrator of motor to make motion and output vibration. In general, the larger the vibrator displacement is, the stronger the performance of the vibration motor is at the same frequency. However, in terms of design, there is an upper limit of displacement of the vibration motor in consideration of reliability and the like. The specific value of the upper limit of the displacement is comprehensively determined by factors such as structural size, reliability of parts and the like.
The motor vibration amplitude is too large to cause the motor vibrator to collide with the shell, so that the motor structure is damaged, and the vibrator displacement is difficult to accurately predict due to factors such as vibration motor performance parameter fluctuation, use environment change and the like. Therefore, in actual use, the displacement margin of the vibrator is relatively large, and for example, the amplitude of the vibrator is designed to be 0.5mm, and only 0.4mm is actually used. There are cases where nearly 20% of the performance is in a compromised, wasteful state, and even in a compromised state, there are cases where the vibrator is vibrating over-displaced, and in extreme cases, crust breaking or the like may occur, which poses challenges to the performance and reliability of the motor.
The embodiment of the application provides a vibrating motor, which is at least beneficial to improving the reliability of the vibrating motor.
Embodiments of the present application will be described in detail below with reference to the attached drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. The claimed application may be practiced without these specific details and with various changes and modifications based on the following embodiments. The vibration motor provided in this embodiment will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a vibration motor according to an embodiment of the present application; fig. 2 is a schematic structural diagram of a capacitor assembly disposed on a stator and a vibrator of a vibration motor according to an embodiment of the present application; FIG. 3 is a schematic diagram of another structure of a vibrating motor according to an embodiment of the present application, in which a capacitor assembly is disposed on a stator and a vibrator; fig. 4 is a schematic structural diagram of a capacitor assembly disposed on a vibrator and a casing of a vibration motor according to an embodiment of the present application; fig. 5 is a schematic structural diagram of a capacitor assembly disposed on a vibrator and a casing of a vibration motor according to an embodiment of the present application.
Referring to fig. 1 to 5, the vibration motor includes: the device comprises a shell 100, a stator 200, a vibrator 300, a capacitor assembly 400 and a control feedback module (not shown in the figure), wherein an accommodating space 101 is formed in the shell 100; the stator 200 is arranged in the accommodating space 101, and the stator 200 is fixed with the bottom surface of the shell 100; the vibrator 300 is suspended in the accommodating space 101, the vibrator 300 is provided with a through hole 301 penetrating the vibrator 300 along the direction perpendicular to the bottom surface of the shell 100 (namely, the third direction Z), the stator 200 is positioned in the through hole 301, and the vibrator 300 can reciprocate relative to the stator 200 along the first direction X parallel to the bottom surface of the shell 100; the capacitor assembly 400 comprises a first polar plate 401 and a second polar plate 402, the first polar plate 401 is fixed on the stator 200 or the vibrator 300, the second polar plate 402 is fixed on the vibrator 300 or the shell 100, the first polar plate 401 is opposite to the second polar plate 402, namely the capacitor assembly 400 is arranged on the shell 100, the stator 200 or the vibrator 300, and the capacitance value of the capacitor assembly 400 is characterized in that the vibrator 300 reciprocates along a first direction X relative to the stator 200; the control feedback module is configured to detect a capacitance value of the capacitive component 400, and calculate a reciprocation state of the vibrator 300 along the first direction X relative to the stator 200 based on the capacitance value.
In the vibration motor provided by the embodiment of the application, the stator 200 and the vibrator 300 are arranged in the shell 100, the vibrator 300 is provided with the through hole 301 penetrating through the vibrator 300 along the direction perpendicular to the bottom surface of the shell 100, the stator 200 is arranged in the through hole 301, and the vibrator 300 can reciprocate relative to the stator 200 along the first direction X so as to drive the whole equipment or a partial area of the equipment provided with the vibration motor to vibrate. The capacitive component 400 of the vibration motor is disposed on the housing 100, the stator 200, or the vibrator 300, and the control feedback module may detect a capacitance value of the capacitive component 400, calculate a reciprocating motion state of the vibrator 300 along the first direction X relative to the stator 200 in real time based on the capacitance value, and further determine whether the vibration of the vibrator 300 exceeds the displacement upper limit. The control feedback module can also feed back the vibration state of the vibrator 300 to the signal input end of the vibration motor, and the signal input end can adjust corresponding input signal parameters in real time according to the actual vibration state of the vibrator 300 so as to avoid the situation that the vibrator 300 vibrates to generate crust breaking, and further improve the reliability of the vibration motor.
Referring to fig. 2 to 5, the capacitor assembly 400 includes a first plate 401 and a second plate 402, and the capacitance value of the capacitor assembly 400 may be calculated by the following formula:
Wherein, Is the dielectric coefficient between the first plate 401 and the second plate 402; s is the relative area of the first plate 401 and the second plate 402; d is the relative distance between the first plate 401 and the second plate 402.
Any one or more of the dielectric constant, the relative area, or the relative distance changes, which results in a change in the capacitance of the capacitive element 400.
Referring to fig. 1 and 2 in combination, in some embodiments, a first plate 401 of the capacitive assembly 400 may be fixed to one side surface of the stator 200 in a first direction X; the second plate 402 of the capacitive assembly 400 may be fixed to the inner wall of the through-hole 301 of the vibrator 300. In this way, when the vibrator 300 reciprocates along the first direction X, the relative distance between the first electrode plate 401 and the second electrode plate 402 changes, and the capacitance value of the corresponding capacitor assembly 400 changes, so that the feedback module is controlled to calculate the vibration state of the vibrator according to the capacitance value.
In fig. 2, the capacitor assembly 400 is exemplified as being disposed on one side of the stator 200 in the first direction X. In some embodiments, the number of the capacitor assemblies may be set to be plural, and thus, a set of capacitor assemblies may be disposed on both sides of the stator in the first direction, respectively. Taking the first side and the second side of the stator on two sides along the first direction as an example, when the vibrator moves to the first side of the stator along the first direction, the capacitance value of the capacitor assembly positioned on the first side of the stator should be increased, and the capacitance value of the capacitor assembly positioned on the second side of the stator should be decreased. The control feedback module can calculate a first displacement parameter according to the capacitance value of the capacitance component at the first side of the stator, and calculate a second displacement parameter according to the capacitance value of the capacitance component at the second side of the stator, and if the vibrator moves only along the first direction and does not deviate to other directions, the first displacement parameter is the same as the second displacement parameter; if the first displacement parameter is different from the second displacement parameter, the movement of the vibrator can be judged to deviate to other directions, and the control feedback module can calculate the deviation angle and direction of the vibrator according to the deviation of the first displacement parameter and the second displacement parameter, so that the displacement feedback of the swinging state of the vibrator is realized.
Referring to fig. 1 and 3 in combination, in some embodiments, the first plate 401 of the capacitor assembly 400 may be fixed to an inner wall of the through hole 301 of the vibrator 300 on one side along the second direction Y, and the second plate 402 of the capacitor assembly 400 is fixed to an inner wall of the through hole 301 of the vibrator 300 on the other side along the second direction Y, which is parallel to the bottom surface of the case 100 and intersects the first direction X. In this way, when the vibrator 300 reciprocates along the first direction X, the dielectric material between the first electrode plate 401 and the second electrode plate 402 changes, and the capacitance value of the corresponding capacitor assembly 400 changes, so that the feedback module is controlled to calculate the vibration state of the vibrator according to the capacitance value.
Referring to fig. 1 and 4 in combination, in some embodiments, the first plate 401 of the capacitor assembly 400 may be fixed to an outer wall of the vibrator 300 at one side along the second direction Y, and the second plate 402 of the capacitor assembly 400 may be fixed to an inner wall of the case 100, and the second direction Y is parallel to the bottom surface of the case 100 and intersects the first direction X. In this way, when the vibrator 300 reciprocates along the first direction X, the relative area between the first electrode plate 401 and the second electrode plate 402 changes, and the capacitance value of the corresponding capacitive component 400 changes, so that the feedback module is controlled to calculate the vibration state of the vibrator according to the capacitance value.
In fig. 4, the capacitor assembly 400 is exemplified as being disposed on one side of the vibrator 300 in the second direction Y. In some embodiments, the number of the capacitor elements may be plural, and thus, a set of capacitor elements may be provided on both sides of the vibrator in the second direction, respectively. When the vibrator moves back and forth along the first direction, the control feedback module can calculate a third displacement parameter according to the capacitance value of the capacitance component at one side of the vibrator, and calculate a fourth displacement parameter according to the capacitance value of the capacitance component at the other side of the vibrator, and if the vibrator moves only along the first direction and does not deviate to other directions, the third displacement parameter is the same as the fourth displacement parameter; if the third displacement parameter is different from the fourth displacement parameter, the movement of the vibrator can be judged to deviate to other directions, and the control feedback module can calculate the deviation angle and direction of the vibrator according to the deviation of the third displacement parameter and the fourth displacement parameter, so that the displacement feedback of the swinging state of the vibrator is realized.
In the drawings provided in this embodiment, an angle between the second direction Y and the first direction X is 90 ° is taken as an example, and the angle between the first direction X and the second direction Y is not limited. In some embodiments, the angle between the first direction and the second direction may be 30 °, 45 °, 60 °, or the like.
Referring to fig. 5, in some embodiments, a first plate 401 of the capacitive assembly 400 may be fixed to the top surface of the vibrator 300, and a second plate 402 of the capacitive assembly 400 is fixed to the top inner wall of the housing 100; alternatively, the first plate 401 may be fixed to the bottom surface of the vibrator 300, and the second plate 402 may be fixed to the bottom inner wall of the case 100. In this way, when the vibrator 300 reciprocates along the first direction X, the relative area between the first electrode plate 401 and the second electrode plate 402 changes, and the capacitance value of the corresponding capacitive component 400 changes, so that the feedback module is controlled to calculate the vibration state of the vibrator according to the capacitance value.
In some embodiments, the number of the capacitor assemblies may be plural, so that one set of capacitor assemblies may be disposed at the top of the vibrator, and another set of capacitor assemblies may be disposed at the bottom of the vibrator. When the vibrator moves back and forth along the first direction, the control feedback module can calculate a fifth displacement parameter according to the capacitance value of the capacitance component at the top of the vibrator, and calculate a sixth displacement parameter according to the capacitance value of the capacitance component at the bottom of the vibrator, and if the vibrator moves only along the first direction and does not deviate to other directions, the fifth displacement parameter is the same as the sixth displacement parameter; if the fifth displacement parameter is different from the sixth displacement parameter, the movement of the vibrator can be judged to deviate to other directions, and the control feedback module can calculate the deviation angle and direction of the vibrator according to the deviation of the fifth displacement parameter and the sixth displacement parameter, so that the displacement feedback of the swinging state of the vibrator is realized.
It will be appreciated that when the number of the capacitor assemblies is plural, the plural capacitor assemblies may be disposed at different positions of the vibration motor based on the structures of the capacitor assemblies shown in fig. 2 to 5, and the arrangement of the capacitor assemblies provided in the above embodiments may be arbitrarily combined without collision to obtain a new embodiment. When the vibrator reciprocates along the first direction, the capacitance value change trend and the change value of the capacitance components at different positions in the vibration motor are different, and the control feedback module can calculate the motion state of the vibrator according to the capacitance values of the capacitance components at a plurality of different positions, so that the calculation accuracy of the control feedback module is improved.
Fig. 6 is a schematic structural diagram of a capacitive component disposed on a circuit board and a vibrator of a vibration motor according to an embodiment of the present application.
Referring to fig. 1 and 6 in combination, in some embodiments, the vibration motor may further include: the circuit board 600, the circuit board 600 is fixed to the top or bottom inner wall of the housing 100, and the second pole plate 402 may be integrated into the circuit board 600 (as shown in the position indicated by the dashed box in fig. 6). Thus, the integration efficiency of the circuit board 600 is improved, and the second pole plate 402 occupies too much volume of the accommodating space 101 in the vibration motor.
In some embodiments, the circuit board 600 may be a flexible board (Flexible Printed Circuit, FPC), a rigid board (Printed Circuit Board, PCB), or a rigid-Flex board (Rigid-Flex, PCB). The circuit board 600 may have a control circuit therein for controlling the vibration motor.
In some embodiments, the control feedback module may be disposed in the circuit board 600, so that the control feedback module may be directly electrically connected to the capacitor assembly 400 through the circuit board 600, so as to facilitate improving the calculation efficiency of the control feedback module.
In some embodiments, the control feedback module may also be disposed external to the vibration motor.
In some embodiments, the control feedback module may be a circuit structure or an electronic component. In some embodiments, the control feedback module may also be a software program.
Referring to fig. 1 and 6, in some embodiments, the vibration motor may further include: an elastic member 500, the elastic member 500 including a first spring 501 and a second spring 502, one end of the first spring 501 being fixed to a side wall of the vibrator 300 in the second direction Y, the other end of the first spring 501 being fixed to an inner wall of the housing 100; one end of the second spring 502 is fixed to the other side wall of the vibrator 300 along the second direction Y, the other end of the second spring 502 is fixed to the inner wall of the housing 100, and the vibrator 300 is suspended in the accommodating space 101 by the elastic member 500.
Fig. 7 is a schematic structural diagram of another vibration motor according to an embodiment of the present application.
Referring to fig. 7, in some embodiments, one end of the first spring 501 may be further fixed to a sidewall of the vibrator 300 in the first direction X, and the other end of the first spring 501 is fixed to an inner wall of the housing 100; one end of the second spring 502 may be fixed to the other side wall of the vibrator 300 along the first direction X, and the other end of the second spring 502 is fixed to the inner wall of the housing 100, so that the vibrator 300 is suspended in the accommodating space 101 through the elastic member 500.
Referring back to fig. 1 to 3, in some embodiments, the vibrator 300 may include a mass 302 having a through hole 301 penetrating the mass 302 in a direction perpendicular to the bottom surface of the case 100, and magnets provided at least on inner walls of the through hole 301 on opposite sides in the first direction X. For example, the magnets may include a first magnet 303 and a second magnet 304, the first magnet 303 and the second magnet being respectively provided as inner walls of both sides of the through hole 301 in the first direction X, the stator 200 may be a coil wound around the first direction X as an axis, and when the coil is energized, a force is generated between the stator 200 and the first magnet 303 and the second magnet 304 due to electromagnetic induction, so that the mass block 302 is driven to reciprocate in the first direction X, thereby achieving vibration of the vibration motor.
In some embodiments, the magnets may further include a third magnet 305 and a fourth magnet 306, the third magnet 305 and the fourth magnet 306 being disposed on both side inner walls of the through hole 301 in the second direction Y, respectively. In this way, the third magnet 305 and the fourth magnet 306 can be beneficial to maintain balance of the vibrator 300 when reciprocating in the first direction X, and avoid the problem that the vibrator 300 is shifted to the second direction Y when reciprocating.
In some embodiments, the magnets may further include a fifth magnet and a sixth magnet, the fifth magnet and the sixth magnet are disposed on the top inner wall and the bottom inner wall of the housing, respectively, and orthographic projections of the fifth magnet and the sixth magnet on the bottom surface of the housing are located in the through hole. Therefore, when the vibrator reciprocates along the first direction, the balance of the vibrator in the vertical direction can be maintained, and the vibrator is prevented from being offset in the vertical direction.
In fig. 1 to 3, for convenience of explanation, the magnets are disposed on the inner wall surface of the through hole 301. In some embodiments, the inner wall of the through hole may further have a groove, and the magnet may be embedded in the groove.
In the present embodiment, taking the stator 200 as a coil, the vibrator 300 includes a mass block 302 and a magnet as an example, so that vibration of the vibrator is achieved by electromagnetic induction. When the circuit board 600 is disposed in the vibration motor, the stator 200 may be electrically connected to the circuit board 600, so that the control of the current or voltage in the stator 200 may be directly implemented through the circuit board 600 in the vibration motor. In some embodiments, the stator may also be connected to a control circuit external to the vibration motor.
In some embodiments, the stator may be a magnet, and the inner wall of the through hole may be provided with an energizing coil, so that electromagnetic induction is formed with the magnet by the energizing coil of the inner wall of the through hole to realize vibration of the vibrator.
In the vibration motor provided by the embodiment of the application, the stator 200 and the vibrator 300 are arranged in the shell 100, the vibrator 300 is provided with the through hole 301 penetrating through the vibrator 300 along the direction perpendicular to the bottom surface of the shell 100, the stator 200 is arranged in the through hole 301, and the vibrator 300 can reciprocate relative to the stator 200 along the first direction X so as to drive the whole equipment or a partial area of the equipment provided with the vibration motor to vibrate. The capacitive component 400 of the vibration motor is disposed on the housing 100, the stator 200, or the vibrator 300, and the control feedback module may detect a capacitance value of the capacitive component 400, calculate a reciprocating motion state of the vibrator 300 along the first direction X relative to the stator 200 in real time based on the capacitance value, and further determine whether the vibration of the vibrator 300 exceeds the displacement upper limit. The control feedback module can also feed back the vibration state of the vibrator 300 to the signal input end of the vibration motor, and the signal input end can adjust corresponding input signal parameters in real time according to the actual vibration state of the vibrator 300 so as to avoid the situation that the vibrator 300 vibrates to generate crust breaking, and further improve the reliability of the vibration motor.
Another embodiment of the present application provides a displacement testing method for a vibration motor, which can be used for performing displacement testing on any one of the vibration motors provided in the above embodiments. It should be noted that, in the same or corresponding parts as those of the above embodiments, reference may be made to the corresponding descriptions of the above embodiments, and detailed descriptions thereof will be omitted. The displacement testing method of the vibration motor according to the present embodiment will be described in detail with reference to the accompanying drawings.
Fig. 8 is a flowchart corresponding to a displacement testing method of a vibration motor according to an embodiment of the present application.
Referring to fig. 8, a displacement testing method of a vibration motor includes:
step 11: an initial vibration signal is provided.
In some embodiments, if a circuit board is present within the vibration motor, the initial vibration signal may be generated from the interior of the vibration motor based on the circuit board. In some embodiments, the vibration motor may also be connected through an external circuit, based on which an initial vibration signal is generated.
Step 12: the initial vibration signal is adjusted by adopting an initial displacement protection model to obtain an adjusted vibration signal, and if the stator responds to the initial vibration signal to generate current or voltage change, the vibrator generates first displacement; if the stator responds to the adjusting vibration signal to generate current or voltage change, the vibrator generates second displacement, and the second displacement is smaller than or equal to the first displacement.
In some embodiments, the initial displacement protection model may be obtained during the manufacturing process of the vibration motor, and specifically, the initial displacement protection model that reflects the change relationship between the motion state of the vibration motor and the electrical parameter may be obtained by a fitting manner according to the electrical parameter of the vibration motor and the corresponding vibration displacement or speed and other parameters. In some embodiments, a displacement protection module connected with the vibration motor may be disposed outside the vibration motor, where the displacement protection module is a circuit structure or a device structure that can output the displacement protection model, and if a flexible circuit board is disposed in the vibration motor, the displacement protection module may be disposed in the flexible circuit board in the vibration motor.
The vibration signal is adjusted through the initial displacement protection model, so that the problem that the vibration motor is rubbed due to overlarge displacement of the vibrator caused by the fact that the initial vibration signal is directly input into the vibration motor can be avoided.
Step 13: an adjustment vibration signal is input to the vibration motor, and the stator generates a current or voltage change in response to the adjustment vibration signal to vibrate the vibrator.
Step 14: and acquiring actual displacement parameters of the vibrator according to the capacitor assembly, wherein the actual displacement parameters are expressed as actual displacement of the vibrator relative to a static state in a vibration process.
Specifically, the control feedback module detects a capacitance value of the capacitive component and calculates an actual displacement parameter based on the capacitance value.
Step 15: and adjusting the initial displacement protection model according to the actual displacement parameters to obtain a target displacement protection model, wherein the target displacement protection model is used for adjusting a vibration signal input to the vibration motor.
In some embodiments, adjusting the initial vibration signal using the initial displacement protection model includes: comparing the initial parameters corresponding to the initial vibration signals with preset parameters, and if the initial parameters are higher than the preset parameters, reducing the initial parameters to obtain adjustment parameters, wherein the vibration signals corresponding to the adjustment parameters are used as adjustment vibration signals; and if the initial parameter is smaller than or equal to the preset parameter, taking the initial vibration signal as an adjustment vibration signal.
If the stator responds to the vibration signal corresponding to the preset parameter to generate current or voltage change, the displacement generated by the vibrator exceeds the upper limit of the displacement. By comparing the initial parameters corresponding to the initial vibration signals with preset parameters, whether the initial vibration signals enable the vibration of the vibrator to exceed the displacement upper limit or not can be judged in advance, and then the initial parameters are properly adjusted to obtain adjustment vibration signals, so that the problem that crust breaking occurs due to the fact that the initial vibration signals are directly input to the vibration motor is avoided.
In the displacement test method of the vibration motor provided by the embodiment, the initial vibration signal is adjusted through the initial displacement protection model, so that the adjustment vibration signal is obtained, the stator generates current or voltage change in response to the adjustment vibration signal, the stator generates a magnetic field when the current or voltage change occurs, the vibrator generates vibration under the acting force of the magnetic field, and compared with the vibrator which generates small vibration when the stator generates current or voltage change in response to the initial vibration signal, the problem that the vibrator collides with the stator or the vibrator collides with the shell can be avoided. Further, when the vibration adjusting signal is transmitted to the stator, the vibrator generates actual displacement, the control feedback module calculates based on the data of the capacitor assembly to obtain an actual displacement parameter of the vibrator, the actual displacement parameter is expressed as an actual vibration state of the vibrator, the accuracy of the initial displacement protection model can be fed back based on comparison between the actual displacement parameter and a displacement parameter expected by the initial displacement protection model, and then the initial displacement protection model can be adjusted according to deviation between the actual displacement parameter and an expected condition to obtain a target displacement protection model, and the target displacement protection model is used for adjusting the vibration signal input to the vibration motor. The method can feed back the actual displacement state of the vibrator to the target displacement protection model in real time, update and adjust the target displacement protection model in real time, and the accuracy of the target displacement protection model is higher, so that the reliability of the vibration motor is improved.
In some embodiments, the displacement protection model may be disposed in the control feedback module, so that the control feedback module may output the adjusted vibration signal at the same time, and receive the capacitance value fed back by the capacitance component to calculate, adjust the vibration signal in real time and rapidly, and improve accuracy and efficiency of the displacement protection model.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the application and that various changes in form and details may be made therein without departing from the spirit and scope of the application.
Claims (9)
1. A displacement testing method of a vibration motor for testing the vibration motor, characterized in that the vibration motor comprises: the shell is internally provided with an accommodating space; the stator is arranged in the accommodating space and is fixed with the bottom surface of the shell; the vibrator is suspended in the accommodating space, the vibrator is provided with a through hole penetrating through the vibrator along the direction perpendicular to the bottom surface of the shell, the stator is positioned in the through hole, and the vibrator can reciprocate relative to the stator along a first direction parallel to the bottom surface of the shell; the capacitor assembly comprises a first polar plate and a second polar plate, and is arranged on the shell, the stator or the vibrator; the control feedback module is used for detecting the capacitance value of the capacitance component and calculating the reciprocating motion state of the vibrator relative to the stator along the first direction based on the capacitance value;
the displacement testing method of the vibration motor comprises the following steps:
providing an initial vibration signal;
an initial displacement protection model is adopted to adjust the initial vibration signal so as to obtain an adjustment vibration signal, and if the stator responds to the initial vibration signal to generate current or voltage change, the vibrator generates first displacement; if the stator responds to the adjustment vibration signal to generate current or voltage change, the vibrator generates second displacement, and the second displacement is smaller than or equal to the first displacement;
Inputting the adjustment vibration signal to the vibration motor, wherein the stator generates current or voltage change in response to the adjustment vibration signal so as to enable the vibrator to vibrate;
Acquiring actual displacement parameters of the vibrator according to the capacitor assembly, wherein the actual displacement parameters are expressed as actual displacement of the vibrator relative to a static state in a vibration process;
And adjusting the initial displacement protection model according to the actual displacement parameters to obtain a target displacement protection model, wherein the target displacement protection model is used for adjusting a vibration signal input to the vibration motor.
2. The displacement testing method according to claim 1, wherein in the vibration motor, the first pole plate is fixed to a side surface of the stator in the first direction; the second pole plate is fixed on the inner wall of the through hole of the vibrator.
3. The displacement testing method according to claim 1, wherein in the vibration motor, the first polar plate is fixed to an inner wall of the through hole of the vibrator on one side in a second direction, and the second polar plate is fixed to an inner wall of the through hole of the vibrator on the other side in the second direction, the second direction being parallel to the bottom surface of the case and intersecting the first direction.
4. The displacement testing method according to claim 1, wherein in the vibration motor, the first polar plate is fixed to an outer wall of the vibrator on one side in a second direction, the second polar plate is fixed to an inner wall of the housing, and the second direction is parallel to the bottom surface of the housing and intersects the first direction.
5. The displacement testing method according to claim 1, wherein in the vibration motor, the first pole plate is fixed to a top surface of the vibrator, and the second pole plate is fixed to a top inner wall of the housing; and/or the first polar plate is fixed on the bottom surface of the vibrator, and the second polar plate is fixed on the bottom inner wall of the shell.
6. The displacement testing method of claim 5, wherein the vibration motor further comprises: the circuit board is fixed on the top inner wall or the bottom inner wall of the shell, and the second pole plate is integrated in the circuit board.
7. The displacement testing method of claim 1, wherein the vibration motor further comprises: the elastic component comprises a first spring and a second spring, one end of the first spring is fixed with one side wall of the vibrator in the second direction, and the other end of the first spring is fixed with the inner wall of the shell; one end of the second spring is fixed with the other side wall of the vibrator along the second direction, the other end of the second spring is fixed with the inner wall of the shell, and the vibrator is suspended in the accommodating space through the elastic component.
8. The displacement testing method according to claim 1, wherein in the vibration motor, the vibrator includes a mass block having the through hole penetrating the mass block in a direction perpendicular to the bottom surface of the housing, and a magnet provided at least on inner walls of the through hole on opposite sides in the first direction.
9. The displacement testing method of claim 1, wherein adjusting the initial vibration signal using an initial displacement protection model comprises:
comparing the initial parameters corresponding to the initial vibration signals with preset parameters, and if the initial parameters are higher than the preset parameters, reducing the initial parameters to obtain adjustment parameters, wherein the vibration signals corresponding to the adjustment parameters are used as the adjustment vibration signals;
And if the initial parameter is smaller than or equal to the preset parameter, taking the initial vibration signal as the adjustment vibration signal.
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