Base value calibration method, operational amplifier value calibration method and control system

Abstract

The application discloses a base value calibration method, an operational amplifier value calibration method and a control system. The base value calibration method is used for controlling a shape memory alloy module. The shape memory alloy module comprises a power mechanism and a lens. The base value calibration method comprises the following steps: controlling the power mechanism by using a driving signal, so that the power mechanism drives the lens; and adjusting the driving signal. When the lens starts to move, the adjusted driving signal is taken as a base value of the driving signal. The application can improve the production efficiency of a shape memory alloy module production line.

Description

Technical Field

[0001] This application relates to the field of intelligent device manufacturing technology, specifically to a base value calibration method, an operational amplifier value calibration method, and a control system. Background Technology

[0002] For existing photography equipment, the quality of its camera function greatly impacts the user experience and even determines the market sales of the equipment. The quality of a photography device's camera function depends on its camera module, and shape memory alloy (SMA) modules are a crucial component of this module. However, current SMA module production lines lack advanced production control methods, resulting in low production efficiency. Summary of the Invention

[0003] In view of this, this application provides a base value calibration method, an operational amplifier value calibration method, and a control system, which can improve the production efficiency of shape memory alloy module production lines.

[0004] This application provides a baseline calibration method for controlling a shape memory alloy module, the shape memory alloy module including a power mechanism and a lens, the baseline calibration method comprising:

[0005] The power mechanism is controlled by a drive signal so that the power mechanism drives the lens;

[0006] The drive signal is adjusted, and when the lens begins to move, the adjusted drive signal is used as the base value of the drive signal.

[0007] Optionally, the power mechanism includes multiple traction lines, each of which is connected to the lens;

[0008] Before controlling the power mechanism with a drive signal to drive the lens, the method further includes:

[0009] Each traction line is driven by a corresponding drive signal to keep each traction line taut.

[0010] Optionally, the power mechanism includes at least one first traction line and at least one second traction line, wherein the number of the first traction line and the number of the second traction line are equal;

[0011] The step of driving each traction wire with a corresponding drive signal to keep each traction wire taut includes:

[0012] The first traction line is driven using the maximum drive signal to minimize its length, and the second traction line is driven using the same maximum drive signal to maximize the length of the first traction line, thereby placing the first traction line under tautness; or,

[0013] The second traction line is driven by the maximum drive signal to make its length reach the minimum value, and the first traction line is driven by the maximum drive signal to make its length reach the maximum value, thereby putting the second traction line in a taut state.

[0014] Optionally, each of the taut traction lines is driven by a corresponding drive signal;

[0015] The adjustment of the drive signal, wherein when the lens begins to move, the adjusted drive signal is used as the base value of the drive signal, includes:

[0016] Each of the driving signals is adjusted to obtain the corresponding target driving signal;

[0017] When the lens begins to move, the target driving signal is used as the base value of the driving signal;

[0018] Repeat the above steps until the base value of each drive signal is determined.

[0019] This application provides an operational amplifier calibration method for controlling a shape memory alloy module, the shape memory alloy module including a power mechanism and a lens, the operational amplifier calibration method comprising:

[0020] The initial drive signal is determined based on the base value of the drive signal;

[0021] The initial drive signal is adjusted based on a preset operational amplifier value, and the adjusted initial drive signal is used to control the power mechanism so that the power mechanism drives the lens.

[0022] Based on the current position of the lens, the preset op-amp value is adjusted until the lens moves to the target position, and the adjusted preset op-amp value is output as the reference op-amp value.

[0023] Optionally, adjusting the initial drive signal based on a preset operational amplifier value and controlling the power mechanism using the adjusted initial drive signal to drive the lens includes:

[0024] The adjustment amplitude of the initial drive signal is controlled by adjusting the preset operational amplifier value;

[0025] The initial drive signal is adjusted based on the adjustment range.

[0026] The power mechanism is controlled by the adjusted initial drive signal so that the power mechanism drives the lens.

[0027] Optionally, the method for determining the current position of the lens as the target position includes:

[0028] The lens is driven to move to the first position using the initial drive signal;

[0029] The angle between the first position and the current position is determined according to a preset function;

[0030] When the angle between the first position and the current position is detected to be within a preset value range, the current position is determined to be the target position.

[0031] Optionally, determining the initial drive signal based on the base value of the drive signal includes:

[0032] The base value of the driving signal is adjusted to obtain the maximum driving signal;

[0033] An initial drive signal is determined based on the base value of the drive signal and the maximum drive signal, wherein the initial drive signal is a drive signal that is greater than the base value of the drive signal and less than the maximum drive signal.

[0034] Optionally, adjusting the base value of the driving signal to obtain the maximum driving signal includes:

[0035] The lens is moved using the base value of the driving signal;

[0036] The base value of the drive signal is continuously adjusted until the lens stops moving, thus obtaining the maximum drive signal.

[0037] Optionally, the step of adjusting the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and then outputting the adjusted preset operational amplifier value as a reference operational amplifier value, includes:

[0038] The initial drive signal is adjusted to the maximum drive signal based on the preset operational amplifier value, and the lens is driven to move to the second position using the maximum drive signal;

[0039] When the second position is detected as the target position, the preset operational amplifier value is output as the reference operational amplifier value.

[0040] Optionally, the power mechanism includes multiple traction lines, each of which is connected to the lens;

[0041] The step of adjusting the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and then outputting the adjusted preset operational amplifier value as the reference operational amplifier value, includes:

[0042] Based on the current position of the lens, adjust the preset operational amplifier value corresponding to the traction line;

[0043] When the lens moves to the corresponding target position, the adjusted preset operational amplifier value is output as the reference operational amplifier value for the corresponding traction line;

[0044] Repeat the above steps until the reference operational amplifier value corresponding to each of the traction lines is output.

[0045] Optionally, the operational amplifier value calibration method further includes:

[0046] When multiple reference op-amp values ​​exist, one of the multiple reference op-amp values ​​is used as the reference reference op-amp value;

[0047] Based on the reference operational amplifier value, the remaining reference operational amplifier values ​​are normalized to obtain the optimal reference operational amplifier value for each of the traction lines.

[0048] This application provides a base value calibration control system for controlling a shape memory alloy module, the shape memory alloy module including a power mechanism and a lens, the base value calibration control system including:

[0049] A first control unit is configured to control the power mechanism using a drive signal, so that the power mechanism drives the lens;

[0050] The first calibration unit is used to adjust the drive signal, and when the lens starts to move, the adjusted drive signal is used as the base value of the drive signal.

[0051] This application discloses an operational amplifier value calibration control system for controlling a shape memory alloy module, the shape memory alloy module including a power mechanism and a lens, the operational amplifier value calibration control system comprising:

[0052] The determining unit is used to determine the initial driving signal based on the base value of the driving signal;

[0053] The second control unit is used to adjust the initial drive signal based on a preset operational amplifier value, and to control the power mechanism using the adjusted initial drive signal so that the power mechanism drives the lens.

[0054] The second calibration unit is used to adjust the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and output the adjusted preset operational amplifier value as the reference operational amplifier value.

[0055] This application provides a base value calibration method, an operational amplifier value calibration method, and a control system. The base value calibration method is used to control a shape memory alloy module, which includes a power mechanism and a lens. First, a drive signal is used to control the power mechanism to drive the lens. Then, the drive signal is adjusted, and when the lens begins to move, the adjusted drive signal is used as the base value of the drive signal. Based on the base value of the drive signal, effective and high-precision control of the shape memory alloy module is achieved. This eliminates the need for repeated adjustment of the drive signal to control the power mechanism and drive the lens during the production process, thus saving the steps of adjusting the drive signal and improving the production efficiency of the shape memory alloy module production line.

[0056] The operational amplifier (op-amp) calibration method provided in this application is used to control a shape memory alloy (SMI) module, which includes a power mechanism and a lens. First, an initial drive signal is determined based on a base value of the drive signal. Second, the initial drive signal is adjusted based on the op-amp value, and the adjusted initial drive signal is used to control the power mechanism to drive the lens. Then, based on the current position of the lens, the op-amp value is adjusted until the lens moves to a target position, and a reference op-amp value is output. Based on the reference op-amp value, effective and high-precision control of the SMI module is achieved, eliminating the need for repeated adjustment of the drive signal to control the power mechanism and drive the lens during production. This saves the steps of adjusting the drive signal and improves the production efficiency of the SMI module production line. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a flowchart illustrating the baseline calibration method provided in the embodiments of this application in a first application scenario;

[0059] Figure 2 This is a schematic diagram of the shape memory alloy module provided in the embodiments of this application;

[0060] Figure 3 This is a flowchart illustrating the baseline calibration method provided in the embodiments of this application in a second application scenario;

[0061] Figure 4 This is a flowchart illustrating the base value calibration method provided in the embodiments of this application in a third application scenario;

[0062] Figure 5 This is a flowchart illustrating the operational amplifier value calibration method provided in the embodiments of this application in a first application scenario;

[0063] Figure 6 This is a flowchart illustrating the operational amplifier value calibration method provided in the embodiments of this application in a second application scenario;

[0064] Figure 7 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a third application scenario;

[0065] Figure 8 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a fourth application scenario;

[0066] Figure 9 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a fifth application scenario;

[0067] Figure 10 This is a schematic diagram of the base value calibration control system provided in the embodiments of this application in a first application scenario;

[0068] Figure 11 This is a schematic diagram of the operational amplifier value calibration control system provided in the embodiments of this application in a first application scenario. Detailed Implementation

[0069] In existing technical solutions, due to the physical characteristics of shape memory alloy modules (one of which is that the shape memory alloy module includes multiple shape memory metal wires, and due to their own physical properties, it is impossible to strictly guarantee that the physical lengths of the four shape memory metal wires are completely consistent), the drive signal used to drive the lens movement of the shape memory alloy module has a start-up threshold and a corresponding unit drive step size under different unit drive signals. This causes the lens of the shape memory alloy module to not move in a unified direction when a fixed drive signal is provided to the shape memory alloy module, thus failing to reach the target position. Therefore, before mass production of shape memory alloy modules, the base value of the drive signal used to control the shape memory alloy module and the operational amplifier value need to be calibrated. This ensures that during the production process, the drive signal is adjusted based on the calibrated base value, and the drive signals of the four shape memory metal wires are adjusted based on the operational amplifier value, so that the four shape memory metal wires work together, thereby accurately controlling the production of the shape memory alloy module.

[0070] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0071] This application provides a baseline calibration method for controlling a shape memory alloy module, which includes a power mechanism and a lens. Please refer to... Figure 1 , Figure 1 This is a flowchart illustrating the baseline calibration method provided in this application embodiment in a first application scenario. The baseline calibration method includes:

[0072] S11. Use drive signals to control the power mechanism so that the power mechanism drives the lens.

[0073] Understandably, the power mechanism is the mechanism that provides the movement power to the lens. This power mechanism can be a traction wire mechanism that provides tension to the lens, or a push rod structure that provides thrust. When the controller receives a drive signal, it controls the power mechanism to pull or push the lens, thereby driving the lens.

[0074] S12. Adjust the drive signal. When the lens starts to move, use the adjusted drive signal as the base value of the drive signal.

[0075] In some embodiments, starting from the minimum drive signal, the drive signal is continuously adjusted until the adjusted drive signal can control the power mechanism to provide sufficient power to the lens to change the lens from a stationary state to a moving state, that is, the lens begins to move. When the lens begins to move, the adjusted drive signal is used as the base value of the drive signal.

[0076] This application provides a baseline calibration method for controlling a shape memory alloy module, which includes a power mechanism and a lens. First, a drive signal is used to control the power mechanism, enabling it to drive the lens. Then, the drive signal is adjusted, and when the lens begins to move, the adjusted drive signal is used as the baseline value. Based on this baseline value, effective and high-precision control of the shape memory alloy module is achieved. This eliminates the need for repeated adjustments of the drive signal during production to control the power mechanism and drive the lens, thus saving the steps of adjusting the drive signal and improving the production efficiency of the shape memory alloy module production line.

[0077] Optionally, in some embodiments, the power mechanism includes multiple traction lines, each of which is connected to the lens.

[0078] Optionally, in some embodiments, the power mechanism includes at least one first traction line and at least one second traction line, the number of first traction lines and second traction lines being equal.

[0079] Optionally, in some embodiments, each taut traction line is driven by a corresponding drive signal.

[0080] In one specific application scenario, the traction wire is a shape memory metal wire.

[0081] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a shape memory alloy module provided in an embodiment of this application. A shape memory alloy module including four shape memory metal wires includes a first shape memory metal wire, a second shape memory metal wire, a third shape memory metal wire, and a fourth shape memory metal wire; wherein, shape memory metal wire sma.1 is the first shape memory metal wire, shape memory metal wire sma.2 is the second shape memory metal wire, shape memory metal wire sma.3 is the third shape memory metal wire, and shape memory metal wire sma.4 is the fourth shape memory metal wire.

[0082] Optionally, in some embodiments, please refer to Figure 3 , Figure 3 This is a flowchart illustrating the baseline calibration method provided in this application embodiment in a second application scenario. The baseline calibration method includes:

[0083] S01. Drive each traction line with the corresponding drive signal to make each traction line taut.

[0084] S02. Use drive signals to control the power mechanism so that the power mechanism drives the lens.

[0085] S03. Adjust the drive signal. When the lens starts to move, use the adjusted drive signal as the base value of the drive signal.

[0086] Optionally, step S01 includes:

[0087] The first traction line is driven using the maximum drive signal to minimize its length, and the second traction line is driven using the same maximum drive signal to maximize the length of the first traction line, thus keeping the first traction line taut; or,

[0088] The second traction line is driven by the maximum drive signal to make its length reach the minimum value, and the first traction line is driven by the maximum drive signal to make its length reach the maximum value, thereby putting the second traction line in a taut state.

[0089] In this embodiment, taking a shape memory alloy module comprising four shape memory metal wires as an example, the two wires sma.1 and sma.4 are driven by the maximum driving signal that they can withstand, so that the lens of the shape memory alloy module moves to the upper right corner extreme position, thereby shortening the shape memory metal wires sma.1 and sma.4 to their shortest length; the two wires sma.2 and sma.3 are driven by the maximum driving signal that they can withstand, so that the lens of the shape memory alloy module moves to the lower left corner extreme position, thereby stretching the shape memory metal wires sma.1 and sma.4 to their longest length; thus, it can be ensured that the shape memory metal wires sma.1 and sma.4 of the shape memory alloy module are both in a taut state.

[0090] Then, the two shape memory metal wires sma.2 and sma.3 are driven with the maximum driving signal that they can withstand, so that the lens of the shape memory alloy module moves to the upper right corner limit position, thereby shortening the shape memory metal wires sma.2 and sma.3 to their shortest length; the two shape memory metal wires sma.1 and sma.4 are driven with the maximum driving signal that they can withstand, so that the lens of the shape memory alloy module moves to the lower left corner limit position, thereby stretching the shape memory metal wires sma.2 and sma.3 to their longest length; thus, it can be ensured that the shape memory metal wires sma.2 and sma.3 of the shape memory alloy module are both in a taut state.

[0091] It is understood that by driving the shape memory metal wire of the shape memory alloy module to a taut state, this embodiment can ensure that the shape memory metal wire will not be damaged or broken when exerting maximum tensile force.

[0092] Please see Figure 4 , Figure 4 This is a flowchart illustrating the baseline calibration method provided in this application embodiment in a third application scenario.

[0093] Optionally, in some embodiments, step S12 includes:

[0094] S121. Adjust each driving signal to obtain the corresponding target driving signal.

[0095] S122. When the camera starts to move, the target drive signal is used as the base value of the drive signal.

[0096] S123. Repeat the above steps until the base value of each drive signal is determined.

[0097] In this embodiment, taking a shape memory alloy module comprising four shape memory metal wires as an example, the shape memory metal wire sma.1 is driven by a driving signal, while the driving signal is continuously adjusted. When the lens position of the shape memory alloy module begins to change, the driving signal that causes the lens position of the shape memory alloy module to change for the first time is recorded as the base value I of the driving signal of the shape memory metal wire sma.1. min (1) Each shape memory metal wire is reset to a taut state, and the shape memory metal wire sma.2 is driven by a drive signal while the drive signal is continuously adjusted. When the lens position of the shape memory alloy module begins to change, the drive signal that causes the lens position of the shape memory alloy module to change for the first time is recorded as the base value I of the drive signal of the shape memory metal wire sma.2. min (2); Similarly, determine the base value I of the driving signal of the shape memory wire sma.3 one by one. min (3) and the base value I of the driving signal of the shape memory wire sma.4 min (4).

[0098] This application provides an operational amplifier value calibration method for controlling a shape memory alloy module. The shape memory alloy module includes a power mechanism and a lens. Please refer to [link to relevant documentation]. Figure 5 , Figure 5 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a first application scenario. The operational amplifier value calibration method includes:

[0099] S21. Determine the initial drive signal based on the base value of the drive signal.

[0100] In some embodiments, the driving signal is increased from the base value of the driving signal until a certain set driving signal is reached as required, which is the initial driving signal. The initial driving signal is less than the maximum driving signal.

[0101] S22. Adjust the initial drive signal based on the preset operational amplifier value, and use the adjusted initial drive signal to control the power mechanism so that the power mechanism drives the lens.

[0102] It is understandable that the op-amp value is a parameter used to drive the signal. When it is necessary to adjust the initial drive signal, the parameter of the initial drive signal can be modified, that is, the preset op-amp value can be modified, so as to adjust the initial drive signal. Then, the adjusted initial drive signal is used to control the power mechanism so that the power mechanism drives the lens.

[0103] In some embodiments, the parameters of the drive signal include the rate of change of the drive signal, that is, the initial drive signal is adjusted by adjusting the rate of change of the initial drive signal.

[0104] S23. Based on the current position of the lens, adjust the preset op-amp value until the lens moves to the target position, and output the adjusted preset op-amp value as the reference op-amp value.

[0105] It is understandable that using a drive signal to move the lens of the shape memory alloy module may also move the lens of the shape memory alloy module to the target position. However, when the lens of the shape memory alloy module cannot be moved to the target position by using a drive signal, it is necessary to adjust the drive signal using a calibrated reference operational amplifier value, and then use the adjusted drive signal to move the lens of the shape memory alloy module to the target position.

[0106] The operational amplifier (op-amp) calibration method provided in this application is used to control a shape memory alloy (SMI) module, which includes a power mechanism and a lens. First, an initial drive signal is determined based on a base value of the drive signal. Second, the initial drive signal is adjusted based on the op-amp value, and the adjusted initial drive signal is used to control the power mechanism to drive the lens. Then, based on the current position of the lens, the op-amp value is adjusted until the lens moves to a target position, and a reference op-amp value is output. Based on the reference op-amp value, effective and high-precision control of the SMI module is achieved, eliminating the need for repeated adjustment of the drive signal to control the power mechanism and drive the lens during production. This saves the steps of adjusting the drive signal and improves the production efficiency of the SMI module production line.

[0107] Please see Figure 6 , Figure 6 This is a flowchart illustrating the operational amplifier value calibration method provided in the embodiments of this application in a second application scenario.

[0108] Optionally, in some embodiments, step S21 includes:

[0109] S211. Adjust the base value of the drive signal to obtain the maximum drive signal.

[0110] S212. Based on the base value of the driving signal and the maximum driving signal, determine the initial driving signal, wherein the initial driving signal is a driving signal that is greater than the base value of the driving signal and less than the maximum driving signal.

[0111] Specifically, step S211 involves using the base value of the driving signal to drive the lens to move; continuously adjusting the base value of the driving signal until the lens stops moving, thus obtaining the maximum driving signal.

[0112] In step S211, taking a shape memory alloy module comprising four shape memory metal wires as an example, the shape memory metal wire sma.1 is driven by a driving signal, while the driving signal is continuously adjusted. When the lens position of the shape memory alloy module begins to change, the driving signal that causes the lens position of the shape memory alloy module to change for the first time is recorded as the base value I of the driving signal of the shape memory metal wire sma.1. min (1) The driving signal that causes the lens position of the shape memory alloy module to change for the last time is recorded as the maximum driving signal I of the shape memory metal wire sma.1. max (1) Each shape memory metal wire is reset to a taut state, and the shape memory metal wire sma.2 is driven by a drive signal while the drive signal is continuously adjusted. When the lens position of the shape memory alloy module begins to change, the drive signal that causes the lens position of the shape memory alloy module to change for the first time is recorded as the base value I of the drive signal of the shape memory metal wire sma.2. min (2) The driving signal that causes the lens position of the shape memory alloy module to change for the last time is recorded as the maximum driving signal I of the shape memory metal wire sma.2. max (2); Similarly, determine the base value I of the driving signal of the shape memory wire sma.3 one by one. min (3) and the maximum driving signal I max (3) and the base value I of the driving signal of the shape memory wire sma.4 min (4) and the maximum drive signal I max (4).

[0113] In step S212, a driving signal equal to half the sum of the base value of the driving signal and the maximum driving signal is taken as the initial driving signal. That is, the initial driving signal of the shape memory metal wire sma.1 is (Imin(1)+Imax(1)) / 2. Similarly, for the other shape memory metal wires in the four shape memory metal wires of the shape memory alloy module, such as shape memory metal wire sma.2, shape memory metal wire sma.3 and shape memory metal wire sma.4, by the same steps as determining the initial driving signal of shape memory metal wire sma.1, the initial driving signals of shape memory metal wire sma.2, shape memory metal wire sma.3 and shape memory metal wire sma.4 can be obtained as (Imin(2)+Imax(2)) / 2, (Imin(3)+Imax(3)) / 2, and (Imin(4)+Imax(4)) / 2, respectively.

[0114] Please see Figure 7 , Figure 7 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a third application scenario.

[0115] Optionally, in some embodiments, step S22 includes:

[0116] S221. The adjustment amplitude of the initial drive signal is controlled by adjusting the preset operational amplifier value.

[0117] S222. Adjust the initial drive signal based on the adjustment range.

[0118] S223. The power mechanism is controlled by the adjusted initial drive signal so that the power mechanism drives the lens.

[0119] In step S221, it can be understood that the adjustment range can be either an increase or a decrease. Taking an increase as an example, for shape memory wire sma.1, with (I max (1)-(I min (1)+I max (1)) / 2)n / N is the growth rate; for shape memory wire sma.4, the growth rate is (Imax(4)-(Imin(4)+Imax(4)) / 2)n / N; for shape memory wire sma.2, the growth rate is (Imax(2)-(Imin(2)+Imax(2)) / 2)n / N; for shape memory wire sma.3, the growth rate is (Imax(3)-(Imin(3)+Imax(3)) / 2)n / N; where the base values ​​of the driving signals corresponding to the four shape memory wires are I min (1) I min (2) I min (3) I min (4), the maximum driving signals are I max (1) I max (2) I max (3) I max (4), n equals 1, 2, 3, ..., N, where N represents the number of components that will be equally divided into the driving signal.

[0120] In step S222, with (I max (1)-(I min (1)+I max (1)) / 2)n / N is the growth rate. The initial driving signal of shape memory metal wire sma.1 is increased. It should be noted that the initial driving signal can only be increased to the maximum driving signal Imax(1). Similarly, the initial driving signals of shape memory metal wire sma.2, shape memory metal wire sma.3 and shape memory metal wire sma.4 are increased with the corresponding growth rate.

[0121] In step S223, the initial drive signal drives the lens to move to the first position. During the process of increasing the initial drive signal, the increased initial drive signal will drive the lens of the shape memory alloy module to move to the second position.

[0122] Optionally, in one application scenario, step S23 specifically includes:

[0123] The initial drive signal is adjusted to the maximum drive signal based on the preset op-amp value, and the lens is moved to the second position using the maximum drive signal; when the second position is detected as the target position, the preset op-amp value is output as the reference op-amp value.

[0124] Please see Figure 8 , Figure 8 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in a fourth application scenario.

[0125] Optionally, this application also provides an embodiment for determining the current position of the lens as the target position, wherein the operational amplifier value calibration method includes:

[0126] S241. Determine the initial drive signal based on the base value of the drive signal.

[0127] S242. Adjust the initial drive signal based on the preset operational amplifier value, and use the adjusted initial drive signal to control the power mechanism so that the power mechanism drives the lens.

[0128] S243, Use the initial drive signal to drive the lens to move to the first position.

[0129] S244. Determine the angle between the first position and the current position according to the preset function.

[0130] S245. When the angle between the first position and the current position is detected to be within the preset value range, the current position is determined to be the target position.

[0131] S246. Based on the current position of the lens, adjust the preset op-amp value until the lens moves to the target position, and output the adjusted preset op-amp value as the reference op-amp value.

[0132] In step S243, the initial drive signal (I) is used. min (1)+I max (1)) / 2、(I min (2)+I max (2)) / 2、(I min (3)+I max (3)) / 2、(I min (4)+I max(4)) / 2 respectively drive four shape memory metal wires, wherein the base values ​​of the driving signals for the four shape memory metal wires are I min (1) I min (2) I min (3) I min (4), the maximum driving signals are I max (1) I max (2) I max (3) I max (4) This allows the lens of the shape memory alloy module to reach the first position.

[0133] In step S244, the preset function is:

[0134]

[0135] Where θ is the angle between the first position and the second position, the coordinates of the first position are (x0, y0), and the coordinates of the second position are (x1, y1).

[0136] Understandably, the preset function can also be tan(x), sin(x), cos(x), etc.

[0137] In step S245, assuming the coordinates of the first position are (x0, y0) and the coordinates of the second position are (x1, y1), and the angle between the first and second positions is θ, when the angle θ is within the preset range of [45°-T, 45°+T], the second position is the target position; otherwise, the second position is not the target position. Here, T is the allowable accuracy error range, which is generally set to 0.5°.

[0138] It should be noted that, since the physical lengths of the four shape memory wires cannot be exactly the same, the angle θ between the second position and the first position reached under the drive of their respective maximum drive signals cannot be within the preset range of [45°-T, 45°+T].

[0139] Please see Figure 9 , Figure 9 This is a flowchart illustrating the operational amplifier value calibration method provided in this application embodiment in the fifth application scenario.

[0140] Optionally, in some embodiments, the power mechanism includes multiple traction cables, each connected to the lens. Step S23 includes:

[0141] S231. Based on the current position of the lens, adjust the preset operational amplifier value of the corresponding traction line.

[0142] S232. When the lens moves to the corresponding target position, the adjusted preset op-amp value is used as the reference op-amp value of the corresponding traction line for output.

[0143] S233. Repeat the above steps until the reference operational amplifier value corresponding to each traction line is output.

[0144] In some embodiments, the traction wire is a shape memory metal wire, and the power mechanism includes multiple shape memory metal wires, each of which is driven by an initial drive signal.

[0145] In step S231, the preset operational amplifier value can be adjusted by using the preset operational amplifier value as an amplification factor of the initial drive signal, and by increasing or decreasing the preset operational amplifier value to control the amplification magnitude of the initial drive signal.

[0146] In this embodiment, the update formula for increasing or decreasing the preset operational amplifier value is:

[0147]

[0148] Where k1 is the reference op-amp value before increasing or decreasing, k2 is the reference op-amp value after increasing or decreasing, the coordinates before the camera moves are (x0, y0), and the coordinates after the camera moves are (x2, y2).

[0149] In step S232, the power mechanism includes multiple shape memory metal wires, and each shape memory metal wire is driven by an initial drive signal. When the angle between the position before the lens moves and the position after the lens moves is not within the preset value range, the preset operational amplifier value of one of the shape memory metal wires is increased or decreased to control the increase of the initial drive signal, thereby controlling the initial drive signal used to drive the shape memory metal wire.

[0150] It is understood that, taking an embodiment including a shape memory alloy module with four shape memory metal wires as an example, the first adjustment amplitude of the initialization drive signal for driving the first shape memory metal wire is adjusted by a first preset operational amplifier value corresponding to the first shape memory metal wire, and the second adjustment amplitude of the initialization drive signal for driving the second shape memory metal wire is adjusted by a second preset operational amplifier value corresponding to the second shape memory metal wire. The initial drive signal for driving the first shape memory metal wire is increased according to the first adjustment amplitude to obtain a first adjustment drive signal, and the initial drive signal for driving the second shape memory metal wire is increased according to the second adjustment amplitude to obtain a second adjustment drive signal. The first shape memory metal wire is driven according to the first adjustment drive signal, and the second shape memory metal wire is driven according to the second adjustment drive signal. When the angle between the position before and after the lens movement is within a preset value range, the first adjustment drive signal and the second adjustment drive signal are maintained, and the first preset operational amplifier value and the second preset operational amplifier value are output. When the angle between the position before and after the lens movement is not within the preset value range, the first preset operational amplifier value remains unchanged, the second preset operational amplifier value is increased or decreased, and the above steps are repeated.

[0151] Assume the preset operational amplifier values ​​for the first shape memory wire sma.1 and the second shape memory wire sma.2 are k, respectively. 12 (1) k 12 (2), according to k 12 (1) k 12 (2) The adjusted drive signal is:

[0152]

[0153] Wherein, I(1) and I(2) are the driving signals corresponding to the first shape memory metal wire sma.1 and the second shape memory metal wire sma.2, respectively.

[0154] The initial values ​​of the preset operational amplifier values ​​for the first shape memory metal wire sma.1 and the second shape memory metal wire sma.2 are set to k. 12 (1) = 1, k 12 (2) = 1, k is obtained by the following equation (4). 12 (1) = 1, k 12 (2) Make adjustments:

[0155]

[0156] The coordinates before the camera moves are (x0, y0), and the coordinates after the camera moves are (x1, y1).

[0157] Similarly, assuming the preset operational amplifier values ​​for the first shape memory wire sma.1 and the fourth shape memory wire sma.4 are k 14 (1) k 14 (4), according to k 14 (1) k 14 (4) The adjusted drive signal is:

[0158]

[0159] Wherein, I(1) and I(4) are the driving signals corresponding to the first shape memory wire sma.1 and the fourth shape memory wire sma.4, respectively.

[0160] The initial value of the preset operational amplifier value for the first shape memory metal wire SMA.1 and the fourth shape memory metal wire SMA.4 is set to k. 14 (1) = 1, k 14 (4) = 1, k is obtained by the following formula (6). 14 (1) = 1, k 14 (4) Make adjustments:

[0161]

[0162] The coordinates before the camera moves are (x0, y0), and the coordinates after the camera moves are (x2, y2).

[0163] Similarly, assuming the preset operational amplifier values ​​for the second shape memory wire sma.2 and the third shape memory wire sma.3 are k 23 (2) k 23 (3) According to k 23 (2) k 23 (3) The adjusted drive signal is:

[0164]

[0165] Wherein, I(2) and I(3) are the driving signals corresponding to the second shape memory wire sma.2 and the third shape memory wire sma.3, respectively.

[0166] The initial values ​​of the preset operational amplifier values ​​for the second shape memory wire SMA.2 and the third shape memory wire SMA.3 are set to k. 23 (2) = 1, k 23 (3) = 1, k is obtained by the following equation (8). 23 (2) k 23 (3) Make adjustments:

[0167]

[0168] The coordinates before the camera moves are (x0, y0), and the coordinates after the camera moves are (x3, y3).

[0169] Similarly, assuming the preset operational amplifier values ​​for the third shape memory wire SMA.3 and the fourth shape memory wire SMA.4 are k 34 (3) k 34 (4), according to k 34 (3) k 34 (4) The adjusted drive signal is:

[0170]

[0171] Wherein, I(3) and I(4) are the driving signals corresponding to the third shape memory wire sma.3 and the fourth shape memory wire sma.4, respectively.

[0172] The initial values ​​of the preset operational amplifier values ​​for the third shape memory metal wire SMA.3 and the fourth shape memory metal wire SMA.4 are set to k. 34 (3) = 1, k 34 (4) = 1, k is obtained by the following equation (10). 34 (3) k 34 (4) Make adjustments:

[0173]

[0174] The coordinates before the camera moves are (x0, y0), and the coordinates after the camera moves are (x4, y4).

[0175] The reference operational amplifier value k of the shape memory alloy module can be obtained using the method described above. 14 (1) k 14 (4) k 12 (1) k 12 (2) k 23 (2) k 23 (3) k 34 (3) k 34 (4) Value, but it can be found that there are multiple reference op-amp values ​​corresponding to the target position. In order to obtain the optimal calibrated reference op-amp value, the following embodiment is used:

[0176] Optionally, in some embodiments, the operational amplifier value calibration method further includes:

[0177] When multiple reference op-amp values ​​exist, one of them is used as the reference op-amp value. Based on the reference op-amp value, the remaining reference op-amp values ​​are normalized to obtain the optimal reference op-amp value for each traction line. The normalization process is as follows:

[0178]

[0179] Where k1, k2, k3, and k4 are the normalized optimal calibration reference op-amp values, and the reference op-amp values ​​corresponding to this target location include k 14 (1) k 14 (4) k 12 (1) k 12 (2) k 23 (2) k 23 (3) k 34 (3) k 34 (4).

[0180] This application provides a base value calibration control system for controlling a shape memory alloy module. The shape memory alloy module includes a power mechanism and a lens. Please refer to [link / reference needed]. Figure 10 , Figure 10 This is a schematic diagram of the base value calibration control system provided in this application embodiment in a first application scenario. The base value calibration control system includes:

[0181] The first control unit 11 is used to control the power mechanism using a drive signal so that the power mechanism drives the lens.

[0182] The first calibration unit 12 is used to adjust the drive signal. When the lens starts to move, the adjusted drive signal is used as the base value of the drive signal.

[0183] Optionally, in some embodiments, the power mechanism includes multiple traction lines, each of which is connected to the lens.

[0184] Optionally, in some embodiments, the first control unit 11 is further configured to:

[0185] Each traction line is driven by its corresponding drive signal to keep it taut.

[0186] Optionally, in some embodiments, the power mechanism includes at least one first traction line and at least one second traction line, the number of first traction lines and second traction lines being equal.

[0187] Optionally, in some embodiments, the first control unit 11 is further configured to:

[0188] The first traction line is driven by the maximum drive signal to reach its minimum length, and the second traction line is driven by the maximum drive signal to reach its maximum length, thereby putting the first traction line in a taut state; or, the second traction line is driven by the maximum drive signal to reach its minimum length, and the first traction line is driven by the maximum drive signal to reach its maximum length, thereby putting the second traction line in a taut state.

[0189] Optionally, in some embodiments, each taut traction line is driven by a corresponding drive signal.

[0190] Optionally, in some embodiments, the first calibration unit 12 is further configured to:

[0191] Adjust each drive signal to obtain the corresponding target drive signal; when the lens starts to move, use the target drive signal as the base value of the drive signal; repeat the above steps until the base value of each drive signal is determined.

[0192] This application provides a baseline calibration control system for controlling a shape memory alloy module. The shape memory alloy module includes a power mechanism and a lens. First, a first control unit 11 uses a drive signal to control the power mechanism, so that the power mechanism drives the lens. Then, a first calibration unit 12 adjusts the drive signal. When the lens starts to move, the adjusted drive signal is used as the baseline value of the drive signal. Based on the baseline value of the drive signal, effective and high-precision control of the shape memory alloy module is achieved. This eliminates the need for the shape memory alloy module production line to repeatedly adjust the drive signal to control the power mechanism and drive the lens during production, thereby saving the steps of adjusting the drive signal and improving the production efficiency of the shape memory alloy module production line.

[0193] This application provides an operational amplifier value calibration control system for controlling a shape memory alloy module. The shape memory alloy module includes a power mechanism and a lens. Please refer to [link to relevant documentation]. Figure 11 , Figure 11 This is a schematic diagram of the operational amplifier value calibration control system provided in this application embodiment in a first application scenario. The operational amplifier value calibration control system includes:

[0194] The determining unit 21 is used to determine the initial driving signal based on the base value of the driving signal.

[0195] The second control unit 22 is used to adjust the initial drive signal based on the preset operational amplifier value, and to control the power mechanism using the adjusted initial drive signal so that the power mechanism drives the lens.

[0196] The second calibration unit 23 is used to adjust the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and output the adjusted preset operational amplifier value as the reference operational amplifier value.

[0197] Optionally, in some embodiments, the second calibration unit 23 is further configured to:

[0198] The adjustment range of the initial drive signal is controlled by adjusting the preset operational amplifier value; the initial drive signal is adjusted based on the adjustment range; and the adjusted initial drive signal is used to control the power mechanism so that the power mechanism drives the lens.

[0199] Optionally, in some embodiments, the determining unit 21 includes:

[0200] The first determining module is used to adjust the base value of the drive signal to obtain the maximum drive signal.

[0201] The second determining module is used to determine the initial driving signal based on the base value of the driving signal and the maximum driving signal, wherein the initial driving signal is a driving signal that is greater than the base value of the driving signal and less than the maximum driving signal.

[0202] Optionally, in some embodiments, the first determining module is further configured to:

[0203] The lens is moved using the base value of the driving signal; the base value of the driving signal is continuously adjusted until the lens stops moving, thus obtaining the maximum driving signal.

[0204] Optionally, in some embodiments, the second calibration unit 23 includes a determination module, which is used to:

[0205] The lens is moved to the first position using the initial drive signal; the angle between the first position and the current position is determined according to the preset function; when the angle between the first position and the current position is detected to be within the preset value range, the current position is determined to be the target position.

[0206] Optionally, in some embodiments, the second calibration unit 23 is further configured to:

[0207] The initial drive signal is adjusted to the maximum drive signal based on the preset op-amp value, and the lens is moved to the second position using the maximum drive signal; when the second position is detected as the target position, the preset op-amp value is output as the reference op-amp value.

[0208] Optionally, in some embodiments, the power mechanism includes multiple traction lines, each of which is connected to the lens.

[0209] Optionally, in some embodiments, the second calibration unit 23 is further configured to:

[0210] Based on the current position of the lens, adjust the preset op-amp value of the corresponding traction line; when the lens moves to the corresponding target position, output the adjusted preset op-amp value as the reference op-amp value of the corresponding traction line; repeat the above steps until the reference op-amp value of each traction line is output.

[0211] Optionally, in some embodiments, the operational amplifier value calibration control system further includes a third calibration unit, which is used for:

[0212] When multiple reference op-amp values ​​exist, one of the reference op-amp values ​​is used as the reference reference op-amp value; based on the reference reference op-amp value, the remaining reference op-amp values ​​are normalized to obtain the optimal reference op-amp value for each traction line.

[0213] The operational amplifier value calibration control system provided in this application embodiment is used to control a shape memory alloy module, which includes a power mechanism and a lens. First, the determining unit 21 determines an initial drive signal based on the base value of the drive signal. Second, the second control unit 22 adjusts the initial drive signal based on the operational amplifier value and uses the adjusted initial drive signal to control the power mechanism so that the power mechanism drives the lens. Then, the second calibration unit 23 adjusts the operational amplifier value based on the current position of the lens until the lens moves to the target position and outputs a reference operational amplifier value. Based on the reference operational amplifier value, effective and high-precision control of the shape memory alloy module is achieved, so that the shape memory alloy module production line does not need to repeatedly adjust the drive signal to control the power mechanism and drive the lens during the production process, thereby saving the step of adjusting the drive signal and improving the production efficiency of the shape memory alloy module production line.

[0214] Although this application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art based on a reading and understanding of this specification and drawings. This application includes all such modifications and variations and is limited only by the scope of the appended claims. In particular, with respect to the various functions performed by the aforementioned components, the terminology used to describe such components is intended to correspond to any component (unless otherwise indicated) that performs the specified function of said component (e.g., is functionally equivalent to it), even if structurally not equivalent to the disclosed structure performing the functions in the exemplary implementations of this specification shown herein.

[0215] That is, the above description is only an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, such as the combination of technical features between different embodiments, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of this application.

[0216] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0217] The above description is provided to enable any person skilled in the art to implement and use this application. Various details are set forth in the above description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other embodiments, well-known processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

Claims

1. A method for calibrating operational amplifier values, characterized in that, For controlling a shape memory alloy module, the shape memory alloy module includes a power mechanism and a lens, and the operational amplifier value calibration method includes: The power mechanism is controlled by a drive signal so that the power mechanism drives the lens; The drive signal is adjusted, and when the lens begins to move, the adjusted drive signal is used as the base value of the drive signal; The initial drive signal is determined based on the base value of the drive signal; The initial drive signal is adjusted based on a preset operational amplifier value, and the adjusted initial drive signal is used to control the power mechanism so that the power mechanism drives the lens. Based on the current position of the lens, the preset op-amp value is adjusted until the lens moves to the target position, and the adjusted preset op-amp value is output as the reference op-amp value.

2. The operational amplifier value calibration method according to claim 1, characterized in that, Methods for determining the current position of the lens as the target position include: The lens is driven to move to the first position using the initial drive signal; The angle between the first position and the current position is determined according to a preset function; When the angle between the first position and the current position is detected to be within a preset value range, the current position is determined to be the target position.

3. The operational amplifier value calibration method according to claim 1, characterized in that, The step of adjusting the initial drive signal based on a preset operational amplifier value and controlling the power mechanism using the adjusted initial drive signal to drive the lens includes: The adjustment amplitude of the initial drive signal is controlled by adjusting the preset operational amplifier value; The initial drive signal is adjusted based on the adjustment range. The power mechanism is controlled by the adjusted initial drive signal so that the power mechanism drives the lens.

4. The operational amplifier value calibration method according to claim 3, characterized in that, The determination of the initial drive signal based on the base value of the drive signal includes: The base value of the driving signal is adjusted to obtain the maximum driving signal; An initial drive signal is determined based on the base value of the drive signal and the maximum drive signal, wherein the initial drive signal is a drive signal that is greater than the base value of the drive signal and less than the maximum drive signal.

5. The operational amplifier value calibration method according to claim 4, characterized in that, The step of adjusting the base value of the driving signal to obtain the maximum driving signal includes: The lens is moved using the base value of the driving signal; The base value of the drive signal is continuously adjusted until the lens stops moving, thus obtaining the maximum drive signal.

6. The operational amplifier value calibration method according to claim 4, characterized in that, The step of adjusting the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and then outputting the adjusted preset operational amplifier value as the reference operational amplifier value, includes: The initial drive signal is adjusted to the maximum drive signal based on the preset operational amplifier value, and the lens is driven to move to the second position using the maximum drive signal; When the second position is detected as the target position, the preset operational amplifier value is output as the reference operational amplifier value.

7. The operational amplifier value calibration method according to claim 6, characterized in that, The power mechanism includes multiple traction lines, each of which is connected to the lens; The step of adjusting the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and then outputting the adjusted preset operational amplifier value as the reference operational amplifier value, includes: Based on the current position of the lens, adjust the preset operational amplifier value corresponding to the traction line; When the lens moves to the corresponding target position, the adjusted preset operational amplifier value is output as the reference operational amplifier value for the corresponding traction line; Repeat the above steps until the reference operational amplifier value corresponding to each of the traction lines is output.

8. The operational amplifier value calibration method according to claim 7, characterized in that, Also includes: When multiple reference op-amp values ​​exist, one of the multiple reference op-amp values ​​is used as the reference reference op-amp value; Based on the reference operational amplifier value, the remaining reference operational amplifier values ​​are normalized to obtain the optimal reference operational amplifier value for each of the traction lines.

9. The operational amplifier value calibration method according to claim 1, characterized in that, The power mechanism includes multiple traction lines, each of which is connected to the lens; Before controlling the power mechanism with a drive signal to drive the lens, the method further includes: Each traction line is driven by a corresponding drive signal to keep each traction line taut.

10. The operational amplifier value calibration method according to claim 9, characterized in that, The power mechanism includes at least one first traction line and at least one second traction line, wherein the number of the first traction line and the number of the second traction line are equal. The step of driving each traction wire with a corresponding drive signal to keep each traction wire taut includes: The first traction line is driven by the maximum drive signal to make the length of the first traction line reach the minimum value, and the second traction line is driven by the maximum drive signal to make the length of the first traction line reach the maximum value, thereby making the first traction line taut. or, The second traction line is driven by the maximum drive signal to make its length reach the minimum value, and the first traction line is driven by the maximum drive signal to make its length reach the maximum value, thereby putting the second traction line in a taut state.

11. The operational amplifier value calibration method according to claim 9, characterized in that, Each of the taut traction lines is driven by a corresponding drive signal; The adjustment of the drive signal, wherein when the lens begins to move, the adjusted drive signal is used as the base value of the drive signal, includes: Each of the driving signals is adjusted to obtain the corresponding target driving signal; When the lens begins to move, the target driving signal is used as the base value of the driving signal; Repeat the above steps until the base value of each drive signal is determined.

12. An operational amplifier value calibration control system, characterized in that, For controlling a shape memory alloy module, the shape memory alloy module includes a power mechanism and a lens, and the operational amplifier value calibration control system includes: A determining unit is used to determine an initial driving signal based on a base value of the driving signal; wherein the base value of the driving signal is obtained through a base value calibration control system, the base value calibration control system includes a first control unit and a first calibration unit, the first control unit is used to control the power mechanism using the driving signal so that the power mechanism drives the lens, and the first calibration unit is used to adjust the driving signal, and when the lens starts to move, the adjusted driving signal is used as the base value of the driving signal; The second control unit is used to adjust the initial drive signal based on a preset operational amplifier value, and to control the power mechanism using the adjusted initial drive signal so that the power mechanism drives the lens. The second calibration unit is used to adjust the preset operational amplifier value based on the current position of the lens until the lens moves to the target position, and output the adjusted preset operational amplifier value as the reference operational amplifier value.

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