CN109960001A - Use the method for SMA wire driving movable part movement - Google Patents
Use the method for SMA wire driving movable part movement Download PDFInfo
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- CN109960001A CN109960001A CN201711402325.2A CN201711402325A CN109960001A CN 109960001 A CN109960001 A CN 109960001A CN 201711402325 A CN201711402325 A CN 201711402325A CN 109960001 A CN109960001 A CN 109960001A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
This application discloses a kind of methods using SMA wire driving movable part movement, it include: that the first SMA wire is warming up to the first temperature, and the second SMA wire is warming up to second temperature, wherein, first temperature is higher than the deformation critical-temperature of SMA wire, second temperature is less than or equal to deformation critical-temperature, first SMA wire of the first temperature and the second SMA wire of second temperature are respectively at the first retracted position and the second stretch position after stabilization, the movable part is moved to desired locations corresponding with first retracted position and second stretch position under the driving of first SMA wire and second SMA wire.
Description
Technical field
This application involves the methods for using SMA wire driving movable part movement.
Background technique
Marmem (Shape Memory Alloys, abbreviation SMA) be it is a kind of can be eliminated after heat temperature raising its
The deformation occurred at lower temperature restores the alloy material of original-shape before it is deformed, that is, possesses the alloy of " memory " effect.
SMA wire can be used to replace motor to drive camera motion in camera module, to realize the optical function such as focusing.SMA wire
There is smaller volume for traditional motor, can be effectively reduced the overall dimensions of mould group, conducive to the small-sized of mould group
Change development.
Camera motion is driven using SMA wire, is to be realized by the contraction of SMA wire at relatively high temperatures, is transporting
In dynamic process, when a portion SMA wire is shunk, another part SMA wire is in tensional state to cooperate the movement of camera lens.
When needing scheduled stroke mobile to some direction from SMA wire driving lens module, active line is usually warming up to deformation
Predetermined temperature more than critical-temperature, to make active linear shrinkage and the slave moving-wire not heated is driven to be stretched to and desired stroke pair
The retracted position answered and stretch position.Since SMA wire itself has certain elasticity, the SMA wire after heating drives camera lens
It moves to desired location, needs certain stabilization time, the presence for stablizing the time influences response speed of the mould group in focusing.When
When camera lens needs to be restored to initial position or needs to move round about, need to allow originally in the SMA of tensional state
Line is shunk, and the SMA wire in contraction state is stretched originally, it is therefore desirable to apply different temperature to SMA wire.But
Is needed to the process that SMA wire heats up, and when SMA wire reaches intended travel the regular hour, since SMA wire itself has
Elastic nature, therefore SMA wire takes a long time and can stablize in intended travel position, drives camera lens by SMA wire
The efficiency of movement is difficult to improve.
Summary of the invention
The application is intended to provide a kind of method using SMA wire driving movable part movement, can be realized SMA wire and camera lens
The fast and stable of module.
This application provides a kind of methods using SMA wire driving movable part movement comprising: by the first SMA wire liter
Second SMA wire is warming up to second temperature to the first temperature by temperature, wherein the first temperature is higher than the deformation stagnation temperature of SMA wire
Degree, second temperature are less than or equal to deformation critical-temperature, and the first SMA wire of the first temperature and the second SMA wire of second temperature exist
The first retracted position and the second stretch position, driving of the movable part in the first SMA wire and the second SMA wire are respectively at after stabilization
Under be moved to desired locations corresponding with the first retracted position and the second stretch position.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: in the first SMA
Before line and the second SMA wire are stablized, the first SMA wire of the first temperature and the second SMA wire of second temperature are heated up again, with
Keep the first SMA wire to heat up again and the second SMA wire stable in the first retracted position and the second stretch position respectively.
In one embodiment, the temperature of the second SMA wire is higher than deformation critical-temperature after heating up again.
In one embodiment, again by the first SMA wire in the first temperature and the SMA wire in second temperature
Heating includes: that the first SMA wire in the first temperature and the SMA wire in second temperature heat up again, so that the first SMA
The heating again of line and the second SMA wire is kept and the preceding identical progressive error that heats up again.
In one embodiment, the first SMA wire in the first temperature and the second SMA wire in second temperature is equal
Heating includes: that the first SMA wire in the first temperature and the SMA wire in second temperature heat up again again, with respectively
Improve identical temperature.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: by settling position
The first SMA wire and the cooling of the second SMA wire afterwards.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: after cooling
First SMA wire is warming up to third temperature, and the second SMA wire after cooling is warming up to the 4th temperature, wherein third temperature is lower than
Or it is equal to deformation critical-temperature, and the 4th temperature is higher than deformation critical-temperature, and the of the first SMA wire of third temperature and the 4th temperature
Two SMA wires are respectively at the first stretch position and the second retracted position after stabilization
In one embodiment, further comprise using the method for SMA wire driving movable part movement: in the first SMA
Before line and the second SMA wire are stablized, again by the first SMA wire in third temperature and the second SMA wire in the 4th temperature
Secondary heating, so that the first SMA wire and the second SMA wire that heat up again are stable in the first stretch position and the second punctured bit respectively
It sets.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: by settling position
The first SMA wire afterwards is cooled to third temperature, and the second SMA wire after settling position is warming up to the 4th temperature, wherein third
Temperature is less than or equal to deformation critical-temperature, and the 4th temperature is higher than deformation critical-temperature, the first SMA wire of third temperature and the 4th
Second SMA wire of temperature is respectively at the first stretch position and the second retracted position after stabilization.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: in the first SMA
Before line and the second SMA wire are stablized, again by the first SMA wire in third temperature and the second SMA wire in the 4th temperature
Secondary heating, so that the first SMA wire and the second SMA wire that heat up again are stable in the first stretch position and the second punctured bit respectively
It sets.
In one embodiment, further comprise using the method for SMA wire driving movable part movement: by settling position
The first SMA wire afterwards is cooled to the 5th temperature, and the second SMA wire after settling position is warming up to the 6th temperature, so that second
SMA wire is contracted to the second retracted position and the first SMA wire is driven to be stretched to the first stretch position, wherein the 5th temperature is higher than shape
Become critical-temperature, the 6th temperature is higher than the 5th temperature.
In one embodiment, the contraction driving movable part of the first SMA wire is moved to first direction, the second SMA wire
Contraction driving moved to the second direction opposite with first direction.
In one embodiment, movable part is the carrier body that camera lens either carries camera lens.
According to the method using SMA wire driving movable part movement of the application, the lens module energy of SMA wire and its drive
It is enough to reach stable state more quickly, to realize corresponding optical function (for example, focusing and optical anti-vibration) more quickly, mention
The high working efficiency of optical module.
Detailed description of the invention
Exemplary embodiment is shown in reference attached drawing.Embodiment and attached drawing disclosed herein should be considered illustrative
, and not restrictive.
Fig. 1 is shown in an illustrative camera module using the top view of SMA wire driving lens assembly；And
Fig. 2 to Fig. 5 shows the amplitude time history plot of the SMA of different-stiffness in the same circumstances.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers
Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way
Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in the present specification, the first, second equal statement is only used for a feature and another feature differentiation
It comes, without indicating any restrictions to feature.Therefore, discussed below without departing substantially from teachings of the present application
First main body is also known as the second main body.
In the accompanying drawings, for ease of description, thickness, the size and shape of object are slightly exaggerated.Attached drawing is merely illustrative
And it is and non-critical drawn to scale.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
In bright book use when indicate exist stated feature, entirety, step, operations, elements, and/or components, but do not exclude the presence of or
It is attached with one or more of the other feature, entirety, step, operation, component, assembly unit and/or their combination.In addition, ought be such as
When the statement of at least one of " ... " appears in after the list of listed feature, entire listed feature is modified, rather than is modified
Individual component in list.In addition, when describing presently filed embodiment, use " can with " indicate " one of the application or
Multiple embodiments ".Also, term " illustrative " is intended to refer to example or illustration.
As it is used in the present context, term " substantially ", " about " and similar term are used as the approximate term of table, and
Be not used as the term of table degree, and be intended to illustrate by by those skilled in the art will appreciate that, measured value or calculated value
In inherent variability.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with
The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and
It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Although in the following description to the technical side of the application by taking SMA wire directly drives the embodiment of lens module as an example
Case is described, but it is to be understood that in various embodiments, SMA wire can not also directly drive lens module, but drive
The carrier body of dynamic carrying lens module, and then lens module associated movement is driven by carrier body.Mirror is directly driven in SMA wire
In the embodiment of head module movement, lens module can be considered as and be integrally formed with carrier body.Therefore, the present processes can
It is considered as the method using SMA wire driving movable part.The movable part can be lens module, or the load of carrying lens module
Body component.
Fig. 1 is shown in an illustrative optical module using the top view of SMA wire driving lens module.
As shown in Figure 1, the lens module 11 of optical module 10 is provided with SMA wire in each side.In Fig. 1, it will hang down
Directly indicated in the plane of the optical axis of lens module 11 with rectangular coordinate system xy.Referring to Fig. 1, the x in the rectangular coordinate system is shown
And y-axis.Based on coordinate system shown in FIG. 1, the direction that can will be perpendicular to x/y plane is considered as z-axis, perpendicular to the upward side of the plane
It is the direction z- perpendicular to the plane downwardly direction to for the direction z+.
In structure shown in fig. 1, the SMA wire in two opposite sides is one group, it is, SMA wire 1 and 3 is
One group, SMA wire 2 and 4 is one group.The both ends of every SMA wire are fixing end, are fixed on fixed device 30.Every SMA wire also has
It is located substantially at the movable end in middle position, movable end winds or is fixed on from the supporting part 12 that lens module 11 is extended.?
When SMA wire is energized heating, SMA wire can be shunk.Since two fixing ends of SMA wire are fixed, the receipts of SMA wire
Meeting contract so that the movable end of SMA wire applies pulling force to supporting part, so that lens module be driven to move.
Further, the fixing end at SMA wire both ends can also be individually fixed in 12 He of supporting part that movable part 11 extends
Fixed device 30.When wherein SMA wire heat shrinkable, one end of fixed device 30 is fixed, is fixed on supporting part 12
Fixing end will receive the pulling force from SMA wire, so that lens module be driven to move.
It can be seen that from the structure of Fig. 1 when needing that lens module 11 is driven to move to the direction x+, need to receive SMA wire 3
Contracting, SMA wire 1 is stretched at this time；Conversely, need to shrink SMA wire 1 when needing that lens module 11 is driven to move to the direction x-,
SMA wire 3 is stretched at this time.Similarly, it when needing that lens module 11 is driven to move to the direction y+, needs to shrink SMA wire 4,
SMA wire 2 is stretched at this time；Conversely, need to shrink SMA wire 2 when needing that lens module 11 is driven to move to the direction y-, this
When SMA wire 4 be stretched.That is, having a SMA wire (that is, heated in lens module 11 into the movement in each direction
The SMA wire of contraction) it is used as active line, a SMA wire (that is, SMA wire of passive drawing) on the other side is used as from moving-wire.In mirror
It is different with the SMA wire from moving-wire as active line when head module 11 is moved to different directions.
In the description carried out above to top view shown in FIG. 1, illustratively there is one with every side of lens module
The situation of SMA wire is described.It is understood that in embodiments, every side of lens module can have more than one
Root SMA wire, more SMA wires for being set to every side can either individually or collectively be moved to drive lens module in the corresponding direction
Movement.
For example, in one embodiment, every side of lens module can have two SMA wires, to surround lens module
SMA wire be eight cable architectures.In this case, above-mentioned every SMA wire may actually be two SMA wires.When needing to drive camera lens
When module 11 is moved to the direction x+, need to shrink two SMA wires as SMA wire 3, at this time two as SMA wire 1
SMA wire is stretched；Conversely, needing to make two as SMA wire 1 when needing that lens module 11 is driven to move to the direction x-
SMA wire is shunk, and is stretched as two SMA wires of SMA wire 3 at this time.Similarly, when needing to drive lens module 11 to y+
When direction moves, needs to shrink two SMA wires as SMA wire 4, be drawn as two SMA wires of SMA wire 2 at this time
It stretches；Conversely, need to shrink two SMA wires as SMA wire 2 when needing that lens module 11 is driven to move to the direction y-,
It is stretched as two SMA wires of SMA wire 4 at this time.Further, when needing that lens module 11 is driven to move to the direction z+
When, it needs to shrink the SMA wire that fixing end is top in two SMA wires on every side, and the SMA of fixing end on the lower
Line is stretched；Conversely, needing to make in two SMA wires on every side when needing that lens module 11 is driven to move to the direction z-
A fixing end SMA wire on the lower is shunk, and the top SMA wire of fixing end is stretched.
SMA wire has deformation critical-temperature.When temperature is no more than deformation critical-temperature, shape will not actively be sent out SMA wire
Changing.For example, SMA wire will not be shunk being heated when temperature is no more than deformation critical-temperature.When SMA wire is risen
To when being more than deformation critical-temperature, SMA wire will be shunk temperature.
Presently filed embodiment proposes a kind of method using SMA wire driving camera motion, wherein to active line and
It heats up from both moving-wires.Specifically, according to one embodiment, include: using the method for SMA wire driving camera motion
The first SMA wire as active line is warming up to the first temperature, and the second temperature will be warming up to as from the second SMA wire of moving-wire
Degree, wherein the first temperature is higher than the deformation critical-temperature of SMA wire, and second temperature is less than or equal to deformation critical-temperature.First temperature
First SMA wire of degree and the second SMA wire of second temperature are respectively at desired first retracted position and second after stabilization and draw
Stretch position.At this point, lens module is moved to and the first retracted position and second under the driving of the first SMA wire and the second SMA wire
The corresponding desired locations of stretch position.
In order to make it easy to understand, being described below using illustrative temperature.In following exemplary description, SMA wire
Deformation critical-temperature is 100 degrees Celsius, and temperature corresponding with desired predetermined stroke and retracted position is 107 degrees Celsius.But
It should be appreciated that the SMA wire of different materials can have different deformation critical-temperatures, desired stroke and retracted position and camera lens mould
The size of block is related to the length of SMA wire etc., therefore temperature corresponding with desired stroke and retracted position is also not fixed.
Herein 100 degrees Celsius and 107 degrees Celsius are only exemplary, and provide as the example being easy to understand, without that should be regarded
There are any restrictions for the protection scope to the application.
According to the warm-natured degree of above-mentioned example, in the above-described embodiment, it is Celsius to be warming up to 107 respectively by active line and from moving-wire
Degree and 100 degrees Celsius after, thus make active linear shrinkage and drive from moving-wire stretch.For example, when needing to drive lens module 11 to x
When+direction moves, SMA wire 3 is warming up to 107 degrees Celsius, and SMA wire 1 is warming up to 100 degrees Celsius, so that SMA wire 3 is shunk
And SMA wire 1 is driven to stretch.In this embodiment, the raised SMA wire of temperature has the rigidity increased.
The inventors of the present application found that the SMA wire that rigidity increases can reach more quickly when other conditions are all the same
Stable state.As a result, according to presently filed embodiment, since the SMA wire as active line and from moving-wire all passes through heating
Rigidity is increased, therefore SMA wire and its lens module of drive can reach stable state more quickly, thus real more quickly
Existing corresponding optical function (for example, focusing and optical anti-vibration), improves the working efficiency of optical module.
Fig. 2 to Fig. 5 shows the amplitude time history plot of the SMA wire of different-stiffness in the same circumstances.Tool
Body, Fig. 2 to Fig. 5 show the amplitude time history plot of SMA wire that rigidity is sequentially increased in the same circumstances,
In, horizontal axis is the time, and the longitudinal axis is amplitude, and the amplitude of SMA wire is zero to mean that SMA wire reaches stable state.Optionally, stablize shape
The standard of state is not necessarily absolute stability, as long as but the amplitude of SMA wire is less than a certain range i.e. it is believed that reaching expected steady
It is fixed.For example, when the amplitude of SMA wire is in range of the Fig. 2 between two red lines into Fig. 5, it is believed that SMA wire has reached predetermined
Stable state.It can be seen that the rigidity of SMA wire is bigger under identical external condition, amplitude reaches with regard to smaller
Time needed for stable state is shorter.
Therefore, according to presently filed embodiment, due to heating up to active line and from both moving-wires, so that
Active line and rigidity from both moving-wires are all promoted, and the time for making SMA wire reach stable state is thus shortened.Further
Active line is being warming up to the first temperature higher than deformation critical-temperature and will be from moving-wire according to presently filed embodiment by ground
It is warming up to after the second temperature less than or equal to deformation critical-temperature, before SMA wire is stablized, by the conduct master of the first temperature
First SMA wire of moving-wire and heating up again as the second SMA wire from moving-wire for second temperature, so that heat up again first
SMA wire and the second SMA wire are stable in the first retracted position and the second stretch position respectively.For example, in the SMA that will be used as active line
Line 3 and as being warming up to 107 degrees Celsius and 100 degrees Celsius respectively from the SMA wire 1 of moving-wire and be warming up to 107 degrees Celsius
Before SMA wire 3 reaches stable state with the SMA wire 1 for being warming up to 100 degrees Celsius, to both SMA wire 3 and SMA wire 1 after of continuing rising
Temperature, so that SMA wire 3 and SMA wire 1 are stable in desired retracted position and stretch position respectively.It should be appreciated that here desired
Retracted position and stretch position with directly by SMA wire 3 and SMA wire 1 be warming up to respectively 107 degrees Celsius and 100 degrees Celsius without after
The stable retracted position and stretch position that temperature of continuing rising is reached is identical or approximately uniform.
Further, slight stiffness variation and corresponding is also had since SMA wire is heated to critical-temperature from room temperature
It shrinks, only ratio is smaller, and yield strength also very little, can approximatively think not needing to do significantly to compensate, Er Qiexiang
Than also can quickly be warming up to the temperature of needs when needing counter motion from the situation that heat is not added in moving-wire in conventional method.
In one embodiment, it can will heat up to 107 degrees Celsius of SMA wire 3 and be warming up to 100 degrees Celsius of SMA wire 1
Continue to heat up, so that the heating that continues of SMA wire 3 and SMA wire 1 generates identical progressive error.Here progressive error be relative to point
It is not warming up to for 107 degrees Celsius and 100 degrees Celsius of SMA wire 3 and the stable state of SMA wire 1.That is, it is assumed that
After the SMA wire 3 for being warming up to 107 degrees Celsius and the SMA wire 1 for being warming up to 100 degrees Celsius reach stable state, then to 3 He of SMA wire
SMA wire 1 continues to heat respectively, and the SMA wire 3 for individually continuing to heat will generate the stroke in the direction x+ of predetermined amount, individually continues to add
The SMA wire 1 of temperature will generate the stroke in same amount of direction x-, so that continuing the SMA wire 3 of heating and SMA wire 1 can protect
Hold with continue heat before identical settling position.
In another embodiment, it can will heat up to 107 degrees Celsius of SMA wire 3 and be warming up to 100 degrees Celsius of SMA
Line 1 continues to heat up, identical temperature is respectively increased.Although temperature, length and the tensional state of SMA wire 3 and SMA wire 1 at this time
It is different from, it is still, often relatively fewer by continuing the raised temperature of heating institute at this time, it is mutually synthermal continuing to increase
When, although progressive error caused by SMA wire 3 and SMA wire 1 be not it is essentially equal, also approximately equal, difference often can be with
Ignore.The SMA wire 3 and SMA wire 1 for continuing heating as a result, be able to maintain with continue roughly the same settling position before heating.
In the above-described embodiment, continue to heat up to active line and from both moving-wires, so as to also generate from moving-wire certain
Convergent force.In this way, active line and further increasing rigidity from moving-wire.
According to one embodiment, after SMA wire reaches stable state, can cool down to SMA wire 3 and SMA wire 1, example
Such as, it is cooled to the temperature (such as room temperature) less than or equal to deformation critical-temperature.Optionally, SMA wire 3 and SMA wire 1 can be cooled to
Identical or different temperature.Due to cooling down after the SMA wire that deformation occurs reaches stable state, avoiding makes SMA wire keep high
Energy consumed by temperature is achieved in energy-efficient purpose.
It, can will be after cooling if necessary to which lens module 11 is mobile to the direction x- after SMA wire 3 and SMA wire 1 cool down
SMA wire 3 and SMA wire 1 be warming up to 100 degree and 107 degree respectively.SMA wire 1 and SMA wire 3 all have the rigidity of increase as a result, from
And SMA wire can be made to be rapidly achieved stable state.
According to one embodiment, 100 degrees Celsius of SMA wire 3 can be warming up to and be warming up to 107 degrees Celsius of SMA wire 1
Before reaching stable state, both SMA wire 3 and SMA wire 1 are continued to heat up, so that SMA wire 3 and SMA wire 1 are respectively provided with more
Big rigidity is to stable more quickly in desired stretch position and retracted position.It should be appreciated that desired stretching here
Position and retracted position with SMA wire 3 and SMA wire 1 are directly warming up to 100 degrees Celsius and 107 degrees Celsius without after of continuing rising respectively
The stable stretch position and retracted position that temperature is reached is identical or approximately uniform.
It according to another embodiment, can not be to SMA after SMA wire 3 and SMA wire 1 continue to heat up and reach stable state
Line 3 and SMA wire 1 cool down, but continue to be maintained at temperature when reaching stable state, such as keep 110 to take the photograph respectively
Family name's degree and 103 degrees Celsius.
In this case, if necessary to which 110 degrees Celsius of SMA wire 3 to the movement of the direction x-, can be dropped to lens module 11
Temperature is warming up to 107 degree centigrade to 100 degree, and by 103 SMA wire 1.SMA wire 1 and SMA wire 3 all have the rigid of increase as a result,
Degree, so as to make SMA wire be rapidly achieved stable state.
It according to one embodiment, can be before SMA wire 3 and SMA wire 1 reach stable state, by SMA wire 3 and SMA wire 1
It is further heated up respectively to 103 degrees Celsius and 110 degrees Celsius, so that SMA wire 3 and SMA wire 1 are stable more quickly in corresponding drawing
Stretch position and retracted position.
It optionally, can also be directly by respectively 110 and 103 or respectively 107 and 100 degrees centigrade 3 Hes of SMA wire
SMA wire 1 cools down respectively and is warming up to 100 and 107 degrees Celsius or 103 and 110 degrees Celsius, so that SMA wire 3 and SMA wire 1 are stablized
In corresponding stretch position and retracted position.
In this embodiment, it since the adjustment of subsequent temperature is carried out on the basis of original temperature, reduces
The reaction time of SMA wire temperature adjustment, to more quickly realize corresponding optical function (for example, focusing and optics are anti-
Tremble), improve the working efficiency of optical module.
In embodiment described above, sent out relative to being influenced in lens module SMA wire by variation of ambient temperature
For the active stabilization way with time-lag effect compensated after raw vibration, the passive stabilization mode for improving rigidity exists
No hysteresis quality on time can be further improved the stability of high-speed capture, microshot or focal length shooting.
It will be appreciated that though combining specific temperature to the method using SMA wire driving camera motion of the application above
Embodiment be described, but as mentioned above, used actual temp is all exemplary, and is in order to just
It is provided in the understanding to technical solution, these specific temperature are not construed as any limit to the protection scope of the application
It is fixed.Also, although combining identical exemplary temperature to carry out into the mobile embodiment in the direction x+ and x- lens module
Description, it is also to be understood that temperature used in actual implementation depends on the distance adjusted required for lens module, because
This, adjusting used temperature every time can be different, and twocouese adjusts required specifically used temperature also not
Association.
Although SMA wire driving of the lens module when the direction x+ and x- moves is described in the application, ability
Field technique personnel can easily understand that the inventive concept based on embodiment described above, lens module is in y+, y-, z+
With also can similarly be driven on the direction z-.
Above description is only the better embodiment of the application and the explanation to institute's application technology principle.Art technology
Personnel should be appreciated that invention scope involved in the application, however it is not limited to skill made of the specific combination of above-mentioned technical characteristic
Art scheme, while should also cover in the case where not departing from the inventive concept, by above-mentioned technical characteristic or its equivalent feature into
Row any combination and the other technical solutions formed.Such as features described above and (but being not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (13)
1. a kind of method using SMA wire driving movable part movement, comprising:
First SMA wire is warming up to the first temperature, and the second SMA wire is warming up to second temperature, wherein first temperature is high
In the deformation critical-temperature of SMA wire, the second temperature is less than or equal to the deformation critical-temperature, the institute of first temperature
Second SMA wire for stating the first SMA wire and the second temperature is respectively at the first retracted position and the second drawing after stabilization
Position is stretched, the movable part is moved under the driving of first SMA wire and second SMA wire to be shunk with described first
Position and the corresponding desired locations of second stretch position.
2. the method as described in claim 1 further comprises:
Before first SMA wire and second SMA wire are stablized, by first SMA wire of first temperature and institute
Second SMA wire for stating second temperature heats up again, so that first SMA wire and the 2nd SMA that heat up again
Line is stable in first retracted position and second stretch position respectively.
3. method according to claim 2, wherein the temperature of second SMA wire is higher than the deformation and faces after heating up again
Boundary's temperature.
4. method according to claim 2, wherein by first SMA wire in first temperature and in described
Heating includes: the SMA wire of second temperature again
First SMA wire in first temperature and the SMA wire in the second temperature are heated up again,
So that first SMA wire and second SMA wire are kept and the preceding identical progressive error that heats up again.
5. method according to claim 2, wherein by first SMA wire in first temperature and in described
Heating includes: second SMA wire of second temperature again
First SMA wire in first temperature and the SMA wire in the second temperature are heated up again,
Identical temperature is respectively increased.
6. it is method according to claim 1 or 2, further comprise:
First SMA wire of settling position and second SMA wire are cooled down.
7. method as claimed in claim 6, further comprising:
First SMA wire after cooling is warming up to third temperature, and second SMA wire after cooling is warming up to the 4th
Temperature, wherein the third temperature is less than or equal to the deformation critical-temperature, and it is critical that the 4th temperature is higher than the deformation
Temperature, first SMA wire of the third temperature and second SMA wire of the 4th temperature are respectively at after stabilization
First stretch position and the second retracted position.
8. the method for claim 7, further comprising:
Before first SMA wire and second SMA wire are stablized, first SMA wire of the third temperature will be in
It heats up again in second SMA wire of the 4th temperature, so that first SMA wire that heats up again and described
Second SMA wire is stable in first stretch position and second retracted position respectively.
9. it is method according to claim 1 or 2, further comprise:
First SMA wire after settling position is cooled to third temperature, and by the second SMA wire liter after settling position
Tetra- temperature of Wen Zhi, wherein the third temperature is less than or equal to the deformation critical-temperature, and the 4th temperature is higher than described
Second SMA wire of deformation critical-temperature, first SMA wire of the third temperature and the 4th temperature is after stabilization
It is respectively at the first stretch position and the second retracted position.
10. method as claimed in claim 9, further comprises:
Before first SMA wire and second SMA wire are stablized, first SMA wire of the third temperature will be in
It heats up again in second SMA wire of the 4th temperature, so that first SMA wire that heats up again and described
Second SMA wire is stable in first stretch position and second retracted position respectively.
11. it is method according to claim 1 or 2, further comprise:
First SMA wire after settling position is cooled to the 5th temperature, and by the second SMA wire liter after settling position
Six temperature of Wen Zhi, so that second SMA wire is contracted to the second retracted position and first SMA wire is driven to be stretched to first
Stretch position, wherein the 5th temperature is higher than the deformation critical-temperature, and the 6th temperature is higher than the 5th temperature.
12. the method for claim 1, wherein the contraction of first SMA wire drives the movable part to first party
To movement, the contraction driving of second SMA wire is moved to second direction opposite to the first direction.
13. the method for claim 1, wherein the movable part is the carrier that camera lens either carries the camera lens
Component.
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| CN201711402325.2A CN109960001B (en) | 2017-12-22 | 2017-12-22 | Method for driving motion of movable part by using SMA wire |
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| CN201711402325.2A CN109960001B (en) | 2017-12-22 | 2017-12-22 | Method for driving motion of movable part by using SMA wire |
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| CN109960001A true CN109960001A (en) | 2019-07-02 |
| CN109960001B CN109960001B (en) | 2021-10-08 |
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