A liquid crystal elastomer-based flexible zoom lens device and control system

Abstract

The application relates to the technical field of zoom control, and discloses a flexible zoom lens device based on a liquid crystal elastomer and a control system; the control system comprises a first zoom judgment module, a zoom parameter calculation module, a second zoom judgment module and a zoom adjustment control module; the first zoom judgment module is used for judging whether to execute a primary zoom control mode; the zoom parameter calculation module is used for calculating a required voltage value of primary zoom adjustment; the second zoom judgment module is used for judging whether to execute a secondary zoom control mode; the zoom adjustment control module is used for calculating an excess voltage value of secondary zoom adjustment; and the zoom performance analysis module is used for formulating indication information; the application can realize combined adjustment control effect of the focal length of the flexible zoom lens from two independent dimensions of light intensity and illumination time length, can timely find local deviation or stretching imbalance of the flexible zoom lens in the stretching deformation process, and can judge whether the elastic characteristics of the liquid crystal elastomer are imbalanced and misaligned according to the specific stretching deformation of the flexible zoom lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of zoom control, more particularly, the present application relates to a flexible zoom lens device based on liquid crystal elastomer and a control system. BACKGROUND

[0002] Optical lenses are core components in many fields such as imaging and sensing. Various types of liquid lens devices have emerged, which can change focal length and control light path direction. Flexible lenses driven by piezoelectric ceramics and ultrasonic motors have also been developed. However, these flexible zoom lenses usually have small zoom range, are not portable, and have rigid motion interference, which is not conducive to precise control of the focal length of the flexible zoom lens.

[0003] The patent application with publication number CN106104352A discloses a zoom lens device and a control method thereof. The zoom lens device includes multiple zoom lens groups composed of two or more lenses. A lens rotation mechanism rotates at least one lens of the two or more lenses that make up the zoom lens group around the optical axis of the zoom lens group, and rotates the lenses other than the at least one lens relative to the optical axis. A zoom lens group driving mechanism moves at least one zoom lens group of the multiple zoom lens groups included in the zoom lens device in the direction of the optical axis according to a zoom command. A control mechanism controls the lens rotation mechanism to rotate the at least one lens around the optical axis at a rotation angle corresponding to the position of the optical axis.

[0004] The existing flexible zoom lens with light driving as the core usually applies fixed intensity light directly to the liquid crystal elastomer to cause deformation of the liquid crystal elastomer and achieve focal length adjustment. However, the deformation of the liquid crystal elastomer depends on both light intensity and illumination time. Simply changing the light intensity has limitations. Moreover, the liquid crystal elastomer may lose elasticity or become unbalanced after long-term and high-frequency heating deformation, which may cause local deviation or stretching imbalance during elastic deformation, thereby reducing the accuracy of focal length adjustment control of the flexible zoom lens.

[0005] In view of the above problems, the present application provides a flexible zoom lens device based on liquid crystal elastomer and a control system. SUMMARY

[0006] To overcome the above-mentioned defects of the prior art and achieve the above-mentioned purposes, the present application provides the following technical solutions: a flexible zoom lens control system based on liquid crystal elastomer, applied to an upper computer, comprising:

[0007] The first zooming judging module is configured to compare the input required focal length value with the supplied focal length value of the flexible zoom lens, calculate an adjusted focal length value, and determine whether to execute a primary zoom control mode.

[0008] The zoom parameter calculating module is configured to calculate the required shrinkage rate and the required light intensity value of the flexible zoom lens in the primary zoom control mode, and combine the required shrinkage rate and the required light intensity value with the first light-voltage function to calculate a required voltage value for the primary zoom adjustment.

[0009] The second zooming judging module is configured to perform the primary zoom adjustment on the flexible zoom lens based on the required voltage value, collect the zooming time length of the flexible zoom lens in real time, and determine whether to execute a secondary zoom control mode.

[0010] The zoom adjustment control module is configured to combine the zooming time length with the second light-voltage function to calculate a standard voltage value in the secondary zoom control mode, and calculate an excess voltage value for the secondary zoom adjustment based on a focal length balance criterion.

[0011] The zoom performance analyzing module is configured to set interval-distributed deformation monitoring points, analyze the deformation state of the flexible zoom lens at the deformation monitoring points, and formulate corresponding indication information, wherein the deformation state includes a completely stretched state and a local offset state.

[0012] Further, the determination method of whether to execute the primary zoom control mode is as follows:

[0013] The adjusted focal length value is calculated by subtracting the required focal length value from the supplied focal length value.

[0014] When the adjusted focal length value is equal to 0, it is determined that the primary zoom control mode is not executed.

[0015] When the adjusted focal length value is greater than 0, it is determined that the primary zoom control mode is executed.

[0016] Further, the calculation method of the required voltage value is as follows:

[0017] The required shrinkage rate of the liquid crystal elastomer is calculated by substituting the adjusted focal length value into the focal length shrinkage function.

[0018] The required light intensity rate of the light assembly is calculated by substituting the required shrinkage rate into the shrinkage light intensity function.

[0019] The required voltage value of the controller is calculated by substituting the required light intensity value into the first light-voltage function.

[0020] The expression of the first light-voltage function is as follows:

[0021] ;

[0022] In the formula, is a supply voltage, is a third diffusion multiple, is a light intensity.

[0023] Further, the determination method of whether to perform the secondary zoom control mode is:

[0024] The working state of the flexible zoom lens at the supply focal length value is recorded as an initial state, and the supply voltage of the controller in the initial state is queried, which is recorded as an initial voltage value;

[0025] The moment when the initial voltage value changes for the first time is recorded as a starting moment, and the duration between the starting moment and the current moment is counted, which is recorded as a zoom duration;

[0026] When the zoom duration is less than or equal to the calibrated contraction duration threshold, it is determined that the secondary zoom control mode is not performed;

[0027] When the zoom duration is greater than the calibrated contraction duration threshold, it is determined that the secondary zoom control mode is performed.

[0028] Further, when calculating the standard voltage, the zoom duration and the calibrated contraction duration threshold are substituted into the second light voltage function to calculate the standard voltage value of the controller;

[0029] The expression of the second light voltage function is:

[0030] ;

[0031] In the formula, is a fourth diffusion multiple, is a zoom duration, is a calibrated contraction duration threshold.

[0032] Further, the focal length balance criterion is that at any moment, the focal length value of the flexible zoom lens is consistent with the required focal length value;

[0033] When calculating the excess voltage value, the required voltage value is subtracted from the standard voltage value to obtain the excess voltage value.

[0034] Further, the setting method of the deformation monitoring point is:

[0035] The maximum value of the contraction rate of the liquid crystal elastomer is queried through the technical parameter table, and 1% of the maximum value of the contraction rate is recorded as a unit contraction rate;

[0036] The last deformation event of the liquid crystal elastomer is queried through the database, and the time duration of the contraction rate of the liquid crystal elastomer when the unit contraction rate changes in each deformation event is counted to obtain B sub-durations;

[0037] After the maximum and minimum of the sub time length are removed, the remaining sub time lengths are accumulated and averaged to obtain a unit deformation time length.

[0038] From the starting time, a unit deformation time length is taken as an interval standard, and D interval distributed deformation monitoring points are marked.

[0039] Further, the deformation state analysis method is:

[0040] E ring-shaped equal-angle distributed tension sensors are arranged at the outer edge of the flexible zoom lens, and the force receiving end of the tension sensor is fixed with one end of the liquid crystal elastomer;

[0041] According to the time sequence, the tension data of the E tension sensors at the deformation monitoring points are sequentially queried to obtain E tension values;

[0042] When the sizes of the E tension values are consistent, the deformation state is recorded as a complete stretching state;

[0043] When the sizes of the E tension values are inconsistent, the deformation state is recorded as a local offset state.

[0044] Further, the indication information includes normal operation information and repair and replacement information;

[0045] When the deformation state of the flexible zoom lens at the deformation monitoring point is a complete stretching state, normal operation information is formulated;

[0046] When the deformation state of the flexible zoom lens at the deformation monitoring point is a local offset state, repair and replacement information is formulated.

[0047] A flexible zoom lens device based on liquid crystal elastomer, the device comprises a host computer, a controller and a flexible zoom lens, the host computer is composed of a first zoom determination module, a zoom parameter calculation module, a second zoom determination module, a zoom adjustment control module and a zoom performance analysis module in the flexible zoom lens control system based on liquid crystal elastomer.

[0048] The technical effect of the flexible zoom lens device based on liquid crystal elastomer and the control system of the present application is:

[0049] ​(1): The present application can provide numerical basis of the dimension of light intensity for the first level adjustment of the focal length of the flexible zoom lens by calculating the required voltage value, and can provide data basis of the dimension of illumination time for the second level adjustment of the focal length of the flexible zoom lens by combining the analysis of the zoom time to calculate the excess voltage value, so as to realize the combined adjustment and control effect of the focal length of the flexible zoom lens from two independent dimensions of light intensity and illumination time, avoid the limitations of the focal length adjustment mode in a single dimension, and then realize the precise and convenient combined adjustment and control effect of the focal length of the flexible zoom lens.

[0050] (2): The present application can periodically analyze and process the adjustment and control process of the focal length of the flexible zoom lens by setting the deformation monitoring points distributed at intervals and analyzing and monitoring the deformation state of the flexible zoom lens at the deformation monitoring points, so as to timely find the local deviation or stretching imbalance phenomenon that may exist in the stretching deformation process of the flexible zoom lens, and judge whether the elastic characteristics of the liquid crystal elastomer are imbalanced and misaligned according to the specific stretching deformation of the flexible zoom lens, and then provide safety protection for the precise adjustment and control of the focal length of the flexible zoom lens, and improve the precision of the focal length adjustment and control of the flexible zoom lens. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A module schematic diagram of a flexible zoom lens control system based on a liquid crystal elastomer is provided for the first embodiment of the present application.

[0052] Figure 2 A structure schematic diagram of a flexible zoom lens device based on a liquid crystal elastomer is provided for the second embodiment of the present application.

[0053] Figure 3 A controller circuit control principle diagram is provided for the second embodiment of the present application.

[0054] Figure 4 A cross-sectional structure schematic diagram of the flexible zoom lens is provided for the second embodiment of the present application.

[0055] Figure 5 A top view structure schematic diagram of the connection between the elastic capsule lens and the liquid crystal elastomer is provided for the second embodiment of the present application.

[0056] In the figure: 1, host computer; 2, controller; 21, single-chip microcomputer; 22, communication module; 23, RS232 socket; 24, first MOS tube; 25, second MOS tube; 26, power module; 27, first socket; 28, second socket; 3, flexible zoom lens; 31, elastic capsule lens; 32, liquid crystal elastomer; 33, LED light source; 34, upper base; 35, lower base; 36, tension sensor. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0058] Embodiment one: please refer to Figure 1 As shown in the figure, the flexible zoom lens control system based on liquid crystal elastomer in the embodiment is applied to an upper computer and comprises:

[0059] A first zoom determination module receives a required focal length value input by a user, compares the required focal length value with a supplied focal length value of the flexible zoom lens, calculates an adjusted focal length value, and determines whether to execute a one-time zoom control mode.

[0060] The required focal length value refers to a value that a user of the flexible zoom lens needs the focal length value of the flexible zoom lens to reach, i.e., a target value of the focal length value of the flexible zoom lens in the adjustment control process. When the required focal length value is greater, it means that the user has a greater adjustment control amplitude for the focal length value of the flexible zoom lens.

[0061] In the embodiment, the required focal length value is obtained by the user inputting in the upper computer.

[0062] The supplied focal length value refers to a focal length value that the flexible zoom lens has in an initial state without any adjustment control, i.e., a basis for comparing the size with the required focal length value, and an adjusted focal length value between the required focal length value and the supplied focal length value is calculated according to the size relationship between the required focal length value and the supplied focal length value.

[0063] In the embodiment, the adjusted focal length value is a difference between the required focal length value and the supplied focal length value of the flexible zoom lens, i.e., a direct basis for adjusting the size of the focal length value of the flexible zoom lens.

[0064] Specifically, the calculation method of the adjusted focal length value is as follows:

[0065] The required focal length value is subtracted from the supplied focal length value to calculate the adjusted focal length value.

[0066] The calculation formula of the adjusted focal length value is as follows:

[0067] ;

[0068] In the formula, F is the adjusted focal length value, F is the required focal length value, and F is the supplied focal length value.

[0069] ​​​It should be noted that the adjustment range of the focal length value of the flexible zoom lens is determined according to the shrinkage amplitude of the liquid crystal elastomer. Since the shrinkage amplitude of the liquid crystal elastomer has a certain range, the adjustment range of the focal length value of the flexible zoom lens is also in a certain range, and is not infinitely large. In order to ensure that the input required focal length value can be adjusted and controlled to the focal length value of the flexible zoom lens, it is necessary to control the required focal length value to be within the range between the supply focal length value and the maximum value of the focal length value of the flexible zoom lens.

[0070] After obtaining the adjusted focal length value, whether the supply focal length value of the flexible zoom lens needs to be adjusted in size can be determined according to the size of the adjusted focal length value. When it is determined that the supply focal length value of the flexible zoom lens needs to be adjusted in size, a one-time zoom control mode is executed.

[0071] In this embodiment, the one-time zoom control mode refers to a working mode in which the focal length value of the flexible zoom lens is adjusted and controlled for the first time when there is an adjusted focal length value triggering the flexible zoom lens to perform focal length adjustment control, so that the flexible zoom lens can be controlled in the first level of focal length adjustment.

[0072] Specifically, the determination method of whether to execute the one-time zoom control mode is:

[0073] When the adjusted focal length value is equal to 0, it means that the required focal length value of the user is consistent with the supply focal length value of the flexible zoom lens. At this time, the flexible zoom lens does not need to be adjusted and controlled in the focal length value, and it is determined that the one-time zoom control mode is not executed.

[0074] When the adjusted focal length value is greater than 0, it means that the required focal length value of the user is greater than the supply focal length value of the flexible zoom lens. At this time, the flexible zoom lens needs to be adjusted and controlled in the focal length value, and it is determined that the one-time zoom control mode is executed.

[0075] It should be noted that since the required focal length value is kept between the supply focal length value and the maximum value of the focal length value of the flexible zoom lens, there is no phenomenon of the adjusted focal length value being less than 0 in this embodiment, and only the phenomenon of the adjusted focal length value being equal to 0 or greater than 0 exists.

[0076] The zoom parameter calculation module combines the adjusted focal length value with the focal length shrinkage function to calculate the required shrinkage rate of the liquid crystal elastomer, combines the required shrinkage rate with the shrinkage light intensity function to calculate the required light intensity value of the light assembly, and combines the required light intensity value with the first light voltage function to calculate the required voltage value of the controller in the one-time zoom control mode.

[0077] When the once zoom control mode is executed, the supply focal length value of the flexible zoom lens needs to be increased to be consistent with the demand focal length value;

[0078] The most core means of the flexible zoom lens in the adjustment control of the supply focal length value is to adjust the size of the power supply voltage of the light component in the flexible zoom lens. By adjusting the power supply voltage of the light component, the light component is driven to irradiate different intensity of light on the liquid crystal elastic piece, so that the liquid crystal elastic piece shrinks and deforms at different amplitudes under different light intensities, to stretch the flexible zoom lens to be stretched outward, finally causing the bending radius of the light transmission surface in the middle position of the flexible zoom lens to become larger, and the curvature to become smaller, realizing the effect of increasing the focal length value of the elastic capsule lens.

[0079] In order to realize the effect of increasing the focal length value of the flexible zoom lens, the direct adjustment object is the power supply voltage of the light component. When the power supply voltage is adjusted, the necessary parameters in the core means need to be calculated, and the demand voltage value matched with the adjustment of the focal length value is obtained according to the calculation result of the necessary parameters, so that the demand voltage value is the basis for adjusting the power supply voltage in the once zoom control mode.

[0080] In this embodiment, the necessary parameters in the core means include the demand shrinkage rate and the demand light intensity value.

[0081] The demand shrinkage rate refers to the proportion of the shrinkage deformation of the liquid crystal elastic body on the basis of meeting the adjustment of the focal length value, which can be used as a basis for subsequent calculation of the demand voltage value.

[0082] When calculating the demand shrinkage rate, the focal length shrinkage function needs to be combined for calculation. The focal length shrinkage function is a function used to represent the size change relationship between the focal length value of the flexible zoom lens and the shrinkage rate of the liquid crystal elastic body, which can be used as a calculation formula for calculating the demand shrinkage rate.

[0083] According to the above change relationship between the focal length value of the flexible zoom lens and the shrinkage rate of the liquid crystal elastic body, the greater the shrinkage rate of the liquid crystal elastic body, the greater the focal length value of the flexible zoom lens. Therefore, the focal length and the shrinkage rate have a linear relationship, and the focal length shrinkage function is used to represent this linear relationship.

[0084] Specifically, the expression of the focal length shrinkage function is:

[0085] ;

[0086] In the formula, is the focal length value, is the first diffusion multiple, is the shrinkage rate.

[0087] In this embodiment, the first diffusion multiple is a fixed value, which can provide the value basis of the linear change multiple for the linear relationship between the shrinkage rate and the focal length value. When determining the first diffusion multiple, it can be set according to the actual needs of the flexible zoom lens, or it can be obtained by averaging after summarizing and analyzing the size change relationship between a large number of focal length values and shrinkage rates in the flexible zoom lens. Each parameter in the expression of the focal length shrinkage function is a dimensionless value after standardization processing, so as to realize the accuracy of parameter calculation.

[0088] When calculating the required shrinkage rate, the focal length value in the focal length shrinkage function is replaced by the adjusted focal length value, so as to calculate the required shrinkage rate of the liquid crystal elastomer.

[0089] The required light intensity value refers to the magnitude of the change of the light intensity required by the illumination assembly on the basis of meeting the adjusted focal length value, which can be used as the second basis for subsequent calculation of the required voltage value.

[0090] When calculating the required light intensity value, the shrinkage light intensity function needs to be combined for calculation. The shrinkage light intensity function is a function used to represent the size change relationship between the shrinkage rate of the liquid crystal elastomer and the light intensity of the illumination assembly, which can be used as the calculation formula for calculating the required light intensity.

[0091] According to the change relationship between the shrinkage rate of the liquid crystal elastomer and the light intensity of the illumination assembly, the greater the light intensity of the illumination assembly, the greater the shrinkage rate of the liquid crystal elastomer at this time. Therefore, the light intensity and the shrinkage rate are in a linear relationship, and the shrinkage light intensity function is used to represent this linear relationship.

[0092] Specifically, the expression of the shrinkage light intensity function is:

[0093] ;

[0094] In the formula, is the light intensity, is the second diffusion multiple.

[0095] In this embodiment, the second diffusion multiple is a fixed value, which can provide the value basis of the linear change multiple for the linear relationship between the shrinkage rate and the light intensity. When determining the second diffusion multiple, it can be set according to the actual needs of the flexible zoom lens, or it can be obtained by averaging after summarizing and analyzing the size change relationship between a large number of light intensities and shrinkage rates in the flexible zoom lens. Each parameter in the expression of the shrinkage light intensity function is a dimensionless value after standardization processing, so as to realize the accuracy of parameter calculation.

[0096] When calculating the required light intensity value, the shrinkage rate in the shrinkage light intensity function is replaced with the required shrinkage rate to calculate the required light intensity rate of the lighting component.

[0097] The required voltage value refers to the magnitude of the change in the controller's power supply voltage required to achieve the desired focal length adjustment for the liquid crystal elastomer.

[0098] When calculating the required voltage value, it is necessary to combine it with the first illumination voltage function for calculation. The first illumination voltage function is a function used to express the relationship between the light intensity of the illumination component and the power supply voltage of the controller when the flexible zoom lens is at the supply focal length value. It can be used as the calculation formula for the required voltage value.

[0099] Based on the relationship between the light intensity of the illumination component and the power supply voltage of the controller, it can be seen that the greater the light intensity of the illumination component, the greater the power supply voltage of the controller. Therefore, there is a linear relationship between the light intensity and the power supply voltage, and this linear relationship is expressed by the first illumination voltage function.

[0100] Specifically, the expression for the first illumination voltage function is:

[0101] ;

[0102] In the formula, The power supply voltage, This is the third diffusion factor.

[0103] In this embodiment, the third diffusion factor is a fixed value, which provides a numerical basis for the linear change factor of the linear relationship between the power supply voltage and the light intensity. When determining the third diffusion factor, it can be set according to the actual needs of the flexible zoom lens, or it can be obtained by summarizing and analyzing a large number of historical changes in the magnitude of the power supply voltage and the light intensity in the flexible zoom lens and then averaging them. In the expression of the first illumination voltage function, each parameter is a dimensionless value after standardization to ensure the accuracy of parameter calculation.

[0104] When calculating the required voltage value, the light intensity in the first illumination voltage function is replaced with the required light intensity value to calculate the required voltage value of the controller.

[0105] In this embodiment, by independently calculating the required shrinkage rate, required light intensity value, and required voltage value in the flexible zoom lens, a reasonable and accurate data basis can be provided for the subsequent adjustment and control of the focal length in the flexible zoom lens, ensuring the accuracy of the focal length adjustment and control of the flexible zoom lens.

[0106] The second zooming determination module drives the controller to perform a first zooming adjustment on the supply voltage based on the demand voltage value, and collects a zooming duration of the flexible zoom lens in real time, performs an overrun analysis on the zooming duration, and determines whether to perform a second zooming control mode.

[0107] The first zooming adjustment on the supply voltage refers to an operation of adjusting and controlling the size of the supply voltage of the controller when the flexible zoom lens is at the supply focal length value, so that the supply voltage of the controller can be quickly and accurately adjusted to be consistent with the size of the demand voltage value, thereby realizing the increase of the light intensity of the illumination assembly, the increase of the shrinkage rate of the liquid crystal elastomer, and the increase of the focal length value of the flexible zoom lens, and further achieving the condition that the focal length value is equal to 0.

[0108] The zooming duration refers to the time span between the first time when the focal length value of the flexible zoom lens changes and the current time, that is, the illumination duration of the light intensity of the illumination assembly can be represented. When the illumination assembly continuously irradiates high-intensity light on the liquid crystal elastomer, the liquid crystal elastomer will be deformed due to the heat radiation of the light. When the liquid crystal elastomer has a significant shrinkage rate change due to heating, the secondary superimposed effect of the shrinkage rate due to heating on the focal length value of the flexible zoom lens needs to be considered.

[0109] When the liquid crystal elastomer is heated and shrinks, it needs to be irradiated by light for a certain length of time. Therefore, when judging whether the liquid crystal elastomer will have a significant shrinkage rate change under the condition of heating, the zooming duration of the flexible zoom lens needs to be analyzed and compared, which can be used as a basis for judging whether the liquid crystal elastomer has a significant shrinkage change.

[0110] The second zooming control mode refers to a working mode of performing a second adjustment control on the focal length value of the flexible zoom lens when the liquid crystal elastomer is significantly deformed due to long-time irradiation of light, so as to perform a second-level adjustment control operation on the focal length value of the flexible zoom lens.

[0111] Specifically, the determination method of whether to perform the second zooming control mode is:

[0112] The working state of the flexible zoom lens at the supply focal length value is recorded as an initial state, and the supply voltage of the controller in the initial state is queried and recorded as an initial voltage value;

[0113] The time when the initial voltage value changes for the first time is recorded as a starting time, and the duration between the starting time and the current time is counted and recorded as a zooming duration;

[0114] The zooming duration is compared with a calibrated shrinkage duration threshold value;

[0115] When the zooming time length is less than or equal to the calibrated contraction time length threshold, it indicates that the liquid elastomer is irradiated by light for a short time, and the liquid crystal elastomer does not have a contraction deformation phenomenon, and it is determined that the secondary zooming control mode is not executed;

[0116] When the zooming time length is greater than the calibrated contraction time length threshold, it indicates that the liquid elastomer is irradiated by light for a long time, and the liquid crystal elastomer has a contraction deformation phenomenon, and it is determined that the secondary zooming control mode is executed.

[0117] It should be noted that the calibrated contraction time length threshold is the minimum value of the zooming time length in the case of executing the secondary zooming control mode, that is, it provides a numerical basis for whether the liquid elastomer irradiated by light will cause contraction deformation; specifically, the calibrated contraction time length threshold is obtained by averaging a large number of minimum values of the zooming time length of the liquid elastomer after being irradiated by light and causing contraction deformation.

[0118] The zooming adjustment control module, in the secondary zooming control mode, combines the zooming time length with the second light irradiation voltage function to calculate the standard voltage value at the current time, calculates the excess voltage value based on the focal length balance criterion, and drives the controller to perform secondary zooming adjustment on the power supply voltage;

[0119] The standard voltage value is the magnitude of the change of the power supply voltage of the controller at the current time in the secondary zooming control mode, and serves as the data basis of the controller in the secondary zooming control mode;

[0120] In calculating the standard voltage value, the second light irradiation voltage function needs to be combined for combined calculation. In calculating the standard voltage value, the zooming time length, the light intensity, and the power supply voltage can be combined and analyzed, so that the focal length value of the flexible zoom lens can be adjusted and controlled from two dimensions of light irradiation time length and light intensity, the influence of light irradiation time length on the contraction deformation of the liquid crystal elastomer can be considered, the limitations of the single-dimensional adjustment and control mode are avoided, and the liquid crystal elastomer can be kept in a reasonable and accurate contraction deformation range, and the focal length value of the flexible zoom lens can be always consistent with the required focal length value.

[0121] The second light irradiation voltage function is a function representing the size change relationship between the light intensity of the light irradiation assembly, the light irradiation time length of the light irradiation assembly, and the power supply voltage of the controller when the supply focal length value of the flexible zoom lens is increasing, which can be used as a calculation formula for calculating the standard voltage value;

[0122] Specifically, the expression of the second light irradiation voltage function is:

[0123] ;

[0124] In the formula, is a fourth diffusion multiple, is a zooming time length, is a calibrated contraction time length threshold.

[0125] In this embodiment, the fourth diffusion multiple is a fixed value, which can provide the value basis of the linear change multiple of the linear relationship between the illumination time length and the power supply voltage; the fourth diffusion multiple is obtained by averaging the size change relationship between the illumination time length and the power supply voltage in a large number of historical flexible zoom lenses; each parameter in the expression of the second illumination voltage function is a dimensionless value after standardization, so as to realize the accuracy of parameter calculation.

[0126] It should be noted that the contraction rate of the liquid crystal elastomer will not increase indefinitely with the increase of the illumination time length, when the contraction rate of the liquid crystal elastomer reaches the maximum value, at this time the liquid crystal elastomer will not deform again, therefore, the zooming time length in the second illumination voltage function has an upper limit, and the upper limit of the zooming time length is the time length required when the contraction rate of the liquid crystal elastomer reaches the maximum value.

[0127] In the calculation of the standard voltage, the zooming time length and the calibrated contraction time length threshold are substituted into the second illumination voltage function, so as to calculate the standard voltage value of the controller.

[0128] When the standard voltage value is calculated, the standard voltage value at this time is used as the value basis of the adjustment control of the power supply voltage of the controller at the current time, so that the power supply voltage of the controller can be consistent with the standard voltage value;

[0129] As can be seen from the second illumination voltage function, the standard voltage value is less than the required voltage value, therefore, the power supply voltage of the controller needs to be adjusted for the second time, at this time the excess voltage value required for the second level adjustment of the power supply voltage of the controller can be calculated under the restriction of the focal length balance criterion;

[0130] The focal length balance criterion is used to ensure that the power supply voltage of the controller can keep dynamic balance with the required focal length value, so as to ensure that the focal length value of the flexible zoom lens can always be consistent with the required focal length value;

[0131] Specifically, the focal length balance criterion is that at any time, the focal length value of the flexible zoom lens is consistent with the required focal length value.

[0132] The excess voltage value refers to the value that the power supply voltage of the controller needs to reach at the current time, and is used as the basis for the second adjustment of the power supply voltage of the controller;

[0133] The calculation method of the excess voltage value is:

[0134] The excess voltage value is calculated by subtracting the demand voltage value from the standard voltage value;

[0135] The excess voltage value is calculated by subtracting the demand voltage value from the standard voltage value;

[0136] ;

[0137] In the formula, is the excess voltage value, is the demand voltage value, is the standard voltage value.

[0138] After the excess voltage value is calculated, the power supply voltage of the controller can be adjusted to reduce the power supply voltage of the controller at the current time by an amplitude corresponding to the excess voltage value, and keep consistent with the standard voltage value, so as to ensure that the focal length value of the flexible zoom lens can keep consistent with the demand focal length value at the current time.

[0139] The zoom performance analysis module determines the unit deformation duration of the liquid crystal elastomer, sets the deformation monitoring point, analyzes the deformation state of the flexible zoom lens at the deformation monitoring point, and formulates the corresponding indication information of the deformation state;

[0140] After adjusting the power supply voltage of the controller, the uniformity and stability of the liquid crystal elastomer in the contraction deformation process need to be monitored and analyzed, so as to analyze the stability of the flexible zoom lens when the focal length value is adjusted, and further detect whether the local deviation or stretching imbalance phenomenon occurs when the flexible zoom lens is stretched.

[0141] When monitoring the stretching process of the flexible zoom lens, the interval duration of the stretching process monitoring of the flexible zoom lens is determined according to the duration corresponding to the certain amount of change of the contraction rate of the liquid crystal elastomer, and the interval duration is recorded as the time span between adjacent deformation monitoring points, so that the deformation monitoring point is used as the time point for monitoring and analyzing the stretching deformation of the flexible zoom lens.

[0142] Specifically, the setting method of the deformation monitoring point is:

[0143] The maximum value of the contraction rate of the liquid crystal elastomer is queried through the technical parameter table, and 1% of the maximum value of the contraction rate is recorded as the unit contraction rate;

[0144] The database is used to retrieve the last deformation event of the liquid crystal elastomer, and the duration of the shrinkage rate of the liquid crystal elastomer during the unit shrinkage rate change in each deformation event is statistically analyzed to obtain B sub-durations. The deformation event is used to record the shrinkage rate change of the liquid crystal elastomer in the flexible zoom lens during zoom control. The deformation event records all data of the shrinkage rate change of the liquid crystal elastomer during zoom control, including but not limited to the magnitude and time of the shrinkage rate change.

[0145] After removing the maximum and minimum values ​​of the sub-duration, the remaining... The average of the individual durations is calculated to obtain the unit deformation duration.

[0146] The formula for calculating the duration of unit deformation is:

[0147] ;

[0148] In the formula, For unit deformation duration, For the first Duration per unit;

[0149] Starting from the initial moment, D interval distribution deformation monitoring points are marked with one unit deformation duration as the standard interval.

[0150] After setting the deformation monitoring points, the tensile deformation of the flexible zoom lens can be monitored and analyzed in chronological order at all deformation monitoring points to determine the deformation state of the flexible zoom lens at the current deformation monitoring point.

[0151] The deformation states include the fully stretched state and the partially offset state. The fully stretched state means that all liquid crystal elastomers have the same shrinkage rate, which can stretch the flexible zoom lens outward completely and uniformly. The partially offset state means that the shrinkage rate of the liquid crystal elastomers is inconsistent, which cannot stretch the flexible zoom lens outward completely and uniformly.

[0152] The method for analyzing deformation states is as follows:

[0153] E tension sensors with an equal-angle ring structure are set on the outer edge of the flexible zoom lens, and the force-receiving end of the tension sensor is fixed to one end of the liquid crystal elastomer. The tension sensors with an equal-angle ring structure can form a uniformly distributed force structure on the outer edge of the flexible zoom lens, thereby providing positional support for data acquisition on whether the force on the flexible zoom lens in different directions is uniform.

[0154] According to the chronological order, retrieve the tensile data of E tensile sensors at the deformation monitoring points to obtain E tensile values;

[0155] When the sizes of the E pulling force values are consistent, it indicates that the shrinkage rates of the liquid crystal elastomer in multiple directions are consistent, the flexible zoom lens can be stretched outward completely and uniformly, and the deformation state of the deformation monitoring point is recorded as a complete stretching state.

[0156] When the sizes of the E pulling force values are inconsistent, it indicates that the shrinkage rates of the liquid crystal elastomer in multiple directions are inconsistent, the flexible zoom lens cannot be stretched outward completely and uniformly, and the deformation state of the deformation monitoring point is recorded as a local deviation state.

[0157] After analyzing the specific deformation state of the flexible zoom lens at the deformation monitoring point, the accuracy of the focal length value adjustment operation of the flexible zoom lens at the current time can be determined according to the deformation state, and it is used as a basis for judging whether the shrinkage characteristics of the liquid crystal elastomer at the current time are abnormal, so that the corresponding indication information can be sent in time when the abnormal phenomenon occurs, prompting whether the liquid crystal elastomer needs to be replaced and repaired.

[0158] The indication information includes normal operation information and repair and replacement information.

[0159] Specifically, when the deformation state of the flexible zoom lens at the deformation monitoring point is a complete stretching state, the shrinkage characteristics of the liquid crystal elastomer are normal at this time, and the normal operation information is formulated.

[0160] When the deformation state of the flexible zoom lens at the deformation monitoring point is a local deviation state, the shrinkage characteristics of the liquid crystal elastomer are abnormal at this time, and the repair and replacement information is formulated.

[0161] It should be noted that when analyzing the shrinkage characteristics of the liquid crystal elastomer, it is not necessary to monitor and analyze the pulling force value of the liquid crystal elastomer at each specific position one by one, and the liquid crystal elastomer needs to be replaced as a whole regardless of the number of abnormal liquid crystal elastomers, so it is only necessary to uniformly monitor whether the pulling force values of the liquid crystal elastomers in multiple symmetrical directions are consistent in the form of a ring or an angular structure. For example, the pulling force sensor is 4, 6 or 8.

[0162] Embodiment two: please refer to Figures 2-5 The embodiment does not describe the part in detail, see the description of embodiment one, and provides a flexible zoom lens device based on liquid crystal elastomer, which comprises a host computer 1, a controller 2 and a flexible zoom lens 3. The host computer 1 is composed of the first zoom judgment module, the zoom parameter calculation module, the second zoom judgment module, the zoom adjustment control module and the zoom performance analysis module in the flexible zoom lens control system based on liquid crystal elastomer in the above embodiment one.

[0163] The input end of the controller 2 is connected with the host computer 1, and the output end of the controller 2 is connected with the flexible zoom lens 3.

[0164] The flexible zoom lens 3 comprises an upper base 34 and a lower base 35 which are symmetrically arranged, and an elastic capsule lens 31 is fixed in the cavity between the upper base 34 and the lower base 35, a plurality of tension sensors 36 are arranged on the elastic capsule lens 31 in an equiangular annular distribution, and the force receiving ends of the tension sensors 36 are connected with liquid crystal elastomers 32;

[0165] The number of the liquid crystal elastomers 32 is two, and the liquid crystal elastomers 32 are respectively arranged in the upper base 34 and the lower base 35, and the liquid crystal elastomers 32 are composed of a plurality of strip-shaped liquid crystal elastic materials which are radially distributed with the center of the elastic capsule lens 31 as a base point;

[0166] The inner part of the upper base 34 and the lower base 35 is provided with an LED light source 33 whose light irradiation direction is towards the liquid crystal elastomers 32, and the LED light source 33 is composed of a plurality of ultraviolet LED lamp beads which are distributed in an annular structure and are connected in series;

[0167] The controller 2 comprises a single-chip microcomputer 21 and a power module 26, the single-chip microcomputer 21 is connected with a communication module 22, the communication module 22 is connected with the host computer 1 through an RS232 socket 23, two analog ports of the single-chip microcomputer 21 are respectively connected with a first MOS tube 24 and a second MOS tube 25, and the first MOS tube 24 and the second MOS tube 25 are respectively connected with two LED light sources 33 through a first socket 27 and a second socket 28.

[0168] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, and all of them should be covered in the protection scope of the present application.

Claims

1. A flexible zoom lens control system based on liquid crystal elastomer, applied to a host computer, characterized in that, include: The first zoom determination module is used to compare the input required focal length value with the supply focal length value of the flexible zoom lens, calculate the adjusted focal length value, and determine whether to execute a zoom control mode. The zoom parameter calculation module is used to calculate the required shrinkage rate and required light intensity value of the flexible zoom lens in a single zoom control mode, and combine the required shrinkage rate and required light intensity value with the first illumination voltage function to calculate the required voltage value of the first zoom adjustment. The method for calculating the required voltage value is as follows: Substitute the adjusted focal length value into the focal length shrinkage function to calculate the required shrinkage rate of the liquid crystal elastomer. Substitute the demand shrinkage rate into the shrinkage light intensity function to calculate the demand light intensity rate of the lighting module; Substitute the required light intensity value into the first illumination voltage function to calculate the required voltage value of the controller; The expression for the first illumination voltage function is: ； In the formula, The power supply voltage, The third diffusion factor, Light intensity; The second zoom determination module is used to perform a first-level zoom adjustment on the flexible zoom lens based on the required voltage value, collect the zoom duration of the flexible zoom lens in real time, and determine whether to execute the second zoom control mode. The zoom adjustment control module is used to combine the zoom duration with the second illumination voltage function in the secondary zoom control mode to calculate the standard voltage value, and to calculate the excess voltage value of the secondary zoom adjustment based on the focal length balance criterion. When calculating the standard voltage value, the zoom duration and the calibrated retraction duration threshold are substituted into the second illumination voltage function to calculate the standard voltage value of the controller. The expression for the second illumination voltage function is: ； In the formula, It is the fourth diffusion factor. For zoom duration, The calibrated contraction duration threshold; The zoom performance analysis module is used to set up spaced deformation monitoring points, analyze the deformation state of the flexible zoom lens at the deformation monitoring points, including the fully stretched state and the local offset state, and formulate corresponding indication information.

2. The flexible zoom lens control system based on liquid crystal elastomer according to claim 1, characterized in that, The method for determining whether to execute a zoom control mode is as follows: The difference between the demand focal length value and the supply focal length value is used to calculate the adjustment focal length value; When the adjusted focal length value is equal to 0, it is determined that the zoom control mode will not be executed once. When the adjusted focal length value is greater than 0, it is determined that a zoom control mode is executed once.

3. The flexible zoom lens control system based on liquid crystal elastomer according to claim 2, characterized in that, The method for determining whether to execute the secondary zoom control mode is as follows: The flexible zoom lens is in the working state of supplying focal length value, which is recorded as the initial state. The power supply voltage of the controller in the initial state is retrieved and recorded as the initial voltage value. The moment when the initial voltage value first changes is recorded as the starting moment, and the duration from the starting moment to the current moment is recorded as the zoom duration. When the zoom duration is less than or equal to the calibrated zoom duration threshold, the secondary zoom control mode is determined not to be executed. When the zoom duration exceeds the calibrated shrinkage duration threshold, the secondary zoom control mode is executed.

4. The flexible zoom lens control system based on liquid crystal elastomer according to claim 3, characterized in that, The focal length balance criterion is: at any given time, the focal length of the flexible zoom lens should remain consistent with the required focal length. When calculating the excess voltage value, the difference between the required voltage value and the standard voltage value is used to obtain the excess voltage value.

5. A flexible zoom lens control system based on a liquid crystal elastomer according to claim 4, characterized in that, The method for setting deformation monitoring points is as follows: Find the maximum shrinkage rate of the liquid crystal elastomer by referring to the technical parameter table, and record 1% of the maximum shrinkage rate as the unit shrinkage rate; The database was used to retrieve the last deformation event of the liquid crystal elastomer, and the time taken for the shrinkage rate of the liquid crystal elastomer to change by a unit shrinkage rate during each deformation event was calculated to obtain B sub-times. After removing the maximum and minimum values ​​of the sub-duration, the remaining... The average of the individual durations is calculated to obtain the unit deformation duration. Starting from the initial moment, D interval distribution deformation monitoring points are marked with one unit deformation duration as the standard interval.

6. The flexible zoom lens control system based on liquid crystal elastomer according to claim 5, characterized in that, The method for analyzing deformation states is as follows: E tension sensors are arranged in a ring at equal angles on the outer edge of the flexible zoom lens, and the force-receiving end of the tension sensor is fixed to one end of the liquid crystal elastomer. According to the chronological order, retrieve the tensile data of E tensile sensors at the deformation monitoring points to obtain E tensile values; When all E tensile force values ​​are the same, the deformation state is recorded as the fully stretched state. When the magnitudes of the E tensile force values ​​are inconsistent, the deformation state is recorded as a local offset state.

7. A flexible zoom lens control system based on a liquid crystal elastomer according to claim 6, characterized in that, The information includes normal operation information and maintenance / replacement information; When the flexible zoom lens is in a fully stretched state at the deformation monitoring point, normal operation information is generated. When the deformation state of the flexible zoom lens at the deformation monitoring point is a local offset state, maintenance and replacement information is generated.

8. A flexible zoom lens device based on a liquid crystal elastomer, the device comprising a host computer (1), a controller (2), and a flexible zoom lens (3), characterized in that, The host computer (1) is composed of the first zoom determination module, the zoom parameter calculation module, the second zoom determination module, the zoom adjustment control module, and the zoom performance analysis module in the flexible zoom lens control system based on liquid crystal elastomer as described in any one of claims 1-7.

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