103results about How to "Rapid change" patented technology

The invention provides a desktop sharing method and a system. The system comprises a sharing terminal, a multimedia multi-point control unit, a viewing terminal and a control terminal, wherein, the sharing terminal is used for collecting desktop images and position and status information of a mouse, receiving operation events from the control terminal and replaying and displaying the events after processing; the multimedia multi-point control unit is used for forwarding the desktop images and the operation events; the viewing terminal is used for receiving the desktop images, and the position and status information of the mouse from the sharing terminal and replaying and displaying the information after decoding and decompression; and the control terminal is used for receiving the desktop images from the sharing terminal, replaying and displaying the information after decoding and decompression, simultaneously carrying out the operation on the desktop images transmitted by the sharing terminal and sending the operation event to the sharing terminal by MCU. The viewing terminal of the desktop sharing system can smoothly browse the remote desktop image and carry out the operation on the sharing terminal by the remote control terminal, truly reflects the operation events as the operation on the sharing terminal, and has excellent interaction effect.

The invention belongs to nondestructive detection technology for magnetic flux leakage of a steel wire rope, relates to an on-line magnetic flux leakage detection probe for the steel wire rope. The on-line magnetic flux leakage detection probe comprises an open-close magnetic flux leakage detection assembly and a floating track mechanism. The floating track mechanism comprises a pedestal, a change-over base, a first linear guide rail, an installation plate, and air cylinder and a second linear guide rail. The magnetic flux leakage detection assembly realizes real-time tracking for the postures of the steel wire rope through the floating track mechanism. The floating track mechanism can realize cohesion detection and opening restoration for the steel wire rope. The detection probe provided by the invention integrates the functions of magnetization and signal output, has the advantages of small size, light weight, strong universality, low cost and the like, and can be suitable for some to-be-detected components with large swing amplitude and fast speed change. The probe is in a split structure but can form a through type probe during a work process, has the effect close to that of through type solenoid coil magnetization, and particularly can realize the nondestructive detection requirements of components such as end-free or two-end anchorages and the like under the conditions of high speed and large swing.

The invention relates to a color changeable camouflage textile based on the electronic ink display technology, comprising a textile body. The color changeable camouflage textile is characterized in that the textile main body is provided with a dominant hue patch and auxiliary color patches, wherein the dominant hue patch is communicated on the whole textile main body; a conductive layer, an electronic ink micro-capsule layer, a transparent conduction thin film and a transparent protection film are sequentially arranged on the dominant hue patch textile substrate; and the conductive layer and the transparent conduction thin film are connected with the anode and the cathode of the power supply device via the control circuit. The color changeable camouflage textile obtained by the invention can change colors in more than two camouflage patterns, has high color changing speed, low cost, is more convenient to produce and machine, can maintain the structure and air / moisture permeating performances of the common textile, and has the color changeable camouflage function and hotness / wetness comfortableness in wearing and using at the same time.

Methods for changing the body temperature of a patient by having them breathe a mist created by nebulizer. The temperature of the mist is adjusted using a heat exchanger. The methods may be used to either cool or warm patients for a variety of clinical reasons. In addition, the invention includes a device (Thermomist) that can be used for generating a mist that can be administered to patients.

The invention relates to a current change rate-based coal mine power grid short-circuiting fault quick judging device and method. The method includes the following four stages of judgment calculation: stage 1, current first-order derivative calculation; stage 2, current first-order derivative zero point crossing judgment; stage 3, current first-order derivative judgment; and stage 4, current second-order derivative calculation and judgment. The method specifically includes the following steps that: the current change rate of a coal mine power grid line is calculated uninterruptedly; whether a first-order derivative crosses a zero point is judged, if the first-order derivative crosses the zero point, the method enters the stage 4, current second-order calculation is started; if the first-order derivative does not cross the zero point, the method enters the stage 3, the first-order derivative is compared with a previous current change rate calculation result, if the current first-order derivative exceeds a set change range, it is judged that a short-circuiting fault occurs, otherwise, the method enters the stage 1, first-order derivative calculation is further executed; and a current second-order derivative is calculated, and is compared with a previous current change second-order derivative, if the current second-order derivative exceeds a set range, it is judged that a short-circuiting fault occurs, and corresponding operation is carried out, otherwise, the method returns to the stage 1. The current change rate-based coal mine power grid short-circuit fault quick judging device and method provided by the invention can quickly and accurately find faults at the moment when short-circuiting occurs.

The invention relates to a biodegradable polymer composite material having shape memory function, comprising a biodegradable polymer material, which is characterized in that the molecular weight of the biodegradable polymer material is 20000 to 1500000, 1 to 20 parts of nano-scopic or micron-sized organic conductive particles and / or inorganic magnetic particles are added in the 100 parts by weight of the polymer, wherein, the organic conductive particles is one of polypyrrole, polyaniline, poly3,4-dioxane ethyl thiophene or the mixture of them, the inorganic magnetic particles is one of ferroferric oxide and ferric oxide magnetic particles or the mixture of them. The mechanical property and mechanical property of the materials, with good elasticity modulus, well elasticity, high shape recovery rate, easy shape memory and changing operation and fast shape recovery speed.

The invention relates to color-changing camouflage fabric based on a reflective electrochromic device and a preparation method thereof. The color-changing camouflage fabric comprises a dominant hue patch and an auxiliary color patch, wherein the dominant hue patch is communicated on the whole fabric; the dominant hue patch is a multi-layer structure, and sequentially comprises flexible conductivefabric, an ion storage layer, an electrolyte layer, a dominant hue patch of conductive camouflage fabric, an electrochromic high polymer layer and a transparent protective film layer from the bottom to the top; and the flexible conductive fabric and the conductive camouflage fabric are respectively connected with the anode and the cathode of power supply equipment. In the invention, the obtained color-changing camouflage fabric adopts two fabric electrodes, so the flexibility is completely realized, and the the wearability of wearing fabric is available. The adopted electrochromic high polymer and the reflection type structure has the characteristics of capability of artificial control at low voltage, interchangeability in more than two kinds of camouflage patterns, high changing speed, bright and outstanding color, low cost and more convenient production and processing.

The invention provides a multi-parameter distributed optical fiber sensing system. When the system transmits a detection signal to an optical fiber, an acousto-optic modulator is used to modulate an optical signal generated by a light source into a periodic pulse light. The magnitude of pulses in the periodic pulse light is different. External vibration information is collected when the pulse amplitude is large. When the pulse amplitude is small, the external temperature and strain information are collected. When the external vibration information is collected, the light intensity change of a Rayleigh scattered light generated by the optical fiber is obvious. Non-linear noise introduced by a stokes light generated by the optical fiber can be avoided when the external temperature and strain information are collected. The accuracy of information collection can be improved. A single information acquisition channel can be used to realize distributed multi-parameter acquisition of vibration, temperature and strain. The structure is relatively simple. The production cost of the system can be reduced.

For a fuel cell system, the flow rate and the pressure of the air flow supplied to the cathode side are controlled with the following procedure. First, air is supplied to the cathode at the flow rate and supply pressure required for generating electricity. In this state, the changing rate of the amount of formed water accumulated in the cathode is estimated based on the required electricity generation and the air flow rate. When the accumulated amount of formed water increases in a high rate, to avoid flooding, the cathode outlet regulation valve is intermittently opened to decrease the outlet gas pressure. Also, at a frequency less than that of the pressure decrease, the air flow rate is increased. By executing this operation, the increased air flow rate and the pressure difference between the cathode inlet and outlet, it is possible to promote discharge of the formed water with small loss of energy.

A radio receiving device acquires obstacle information showing a direction in which an obstacle is existing from an obstacle detecting device 12, and controls radio receiving antennas 31-1 to 31-M according to the obstacle information so as to receive an electric wave. As a result, the radio receiving device can improve the quality of the reception of an electric wave even when an obstacle 3 is existing, and can also respond quickly to a rapid change in electric waves.

The invention relates to a low-orbit satellite anchoring-based autonomous orbit determination method of Beidou navigation constellation. The low-orbit satellite anchoring-based autonomous orbit determination method comprises the steps of performing inter-satellite bidirectional pseudo-range observation by a Beidou inter-satellite link, sending Beidou inter-satellite bidirectional observation quantity information and prior position and speed information of a local satellite under a geocentric inertial coordinate system to an adjacent Beidou navigation satellite by the inter-satellite link; receiving Beidou downlink observation quantity information sent from a low-orbit satellite and autonomous orbit determination data of the low-orbit satellite; performing error correction on pseudo-range between Beidou double satellites and pseudo-range between the Beidou satellite and the low-orbit satellite, and eliminating a transceiving equipment error and a link error; and unifying the corrected pseudo-range between the Beidou satellite and the low-orbit satellite and the pseudo-range between the Beidou satellite and the low-orbit satellite to the same moment, decoupling inter-satellite distance and relative clock error in the bidirectional observation information between Beidou satellites, taking the low-orbit satellite pseudo-range, the distance between the Beidou satellites and the relative clock error as observation quantity, and calculating position, speed and clock error of the Beidou satellite by an extended Kalman filtering method.

A warpage angle measurement apparatus and a warpage angle measurement method are provided that can measure an angle of warpage of an optical disc and a cartridge for the optical disc caused by a rapid environmental change such as a temperature change or a humidity change in a short time. The warpage angle measurement apparatus 10 includes: a constant temperature chamber 22 for accommodating an optical recording medium 20 formed by mounting the optical disc 16 as an object to be measured in the cartridge 18 and for adjusting a surrounding of the optical recording medium 20 to have a predetermined environmental condition; a laser oscillator 24 for causing laser oscillation to emit laser light to the optical disc 16; and a light-receiving unit 26 for receiving the laser light reflected from the optical disc 16 and detecting a relative angle of an optical path L2 of the reflected laser light with respect to an optical path L1 of the emitted laser light.

The invention belongs to the smart trolley information processing technical field and discloses a mobile trolley traction control method and system. The control method includes the following steps that: initialization is carried out, and current inductance values are acquired; two inductance values are normalized; normalized values are obtained, and whether the obtained values are greater than 0 or smaller than 0 is judged; direction judgment is performed; and the above steps are cycled continuously. A direction control algorithm used in the program of the present invention is fuzzy control, and a speed control algorithm in the present invention is PID control; and since the direction control of the invention adopts fuzzy control, and the robustness of the direction control is strong, andtherefore, the influence of interference and parameter variation on a control effect is greatly weakened, the direction control is especially suitable for the control of nonlinear, time-varying and pure-lag systems, and the accurate mathematical model of an object is not required.

The invention aims at providing a permanent magnetizer and a magnetic flux leakage testing probe formed by the permanent magnetizer. The permanent magnetizer comprises a first annular permanent magnet body, a second annular permanent magnet body and an annular armature, wherein the annular armature is clamped between the first annular permanent magnet body and the second annular permanent magnet body, and the annular armature, the first annular permanent magnet body and the second annular permanent magnet body are coaxial and are jointed to form a through type permanent magnetizer. The magnetic flux leakage testing probe formed by the through type permanent magnetizer further comprises a shoe-shaped probe which is arranged in an inner cavity of the armature coaxially and is detachably connected with the armature. The magnetic flux leakage testing probe disclosed by the invention integrates magnetization and signal output functions, has the advantages of small size, light weight, strong universality, low cost and the like, and can be suitable for the characteristics of components to be tested on the large swing amplitude and the high change speed; and the probe has a split structure, can also form a through type probe during operation, also has the effect close to the magnetization effect of a through type solenoid coil, and especially can realize the nondestructive testing requirements of non-end or two-end anchored components under the conditions of high speed and large swinging amplitude.

The invention discloses a safety control system for a fork of a forklift and a method of the control system. A controller acquires a fork angle signal detected by a tilt angle sensor, a fork altitudesignal detected by an altitude switch and a fork load signal detected by a load sensor, controls the opening changes of a forward tilting solenoid valve, a backward tilting solenoid valve, a lifting solenoid valve and a falling solenoid valve, and realizes a fork extreme position buffer function, a fork forward tilting angle limiting function, a fork backward tilting speed limiting function and afork one-key leveling function. The safety control system and the method realize fork low-position buffer control, high-altitude forward tilting angle control, backward tilting speed control and one-key leveling control, so that the safety, the comfort and the convenience of drivers are improved.

The invention relates to a turbine engine (2), such as an aircraft turbofan engine, comprising: an epicyclic gear (36); a turbine driving in rotation a transmission shaft (34) integral in rotation with the sun gear (60) of the epicyclic gear (36); a fan (18) integral with the outer ring (66) of the epicyclic gear (36); and an electric motor (70) comprising a rotor (72) and a stator (74), the rotor (72) being integral with the planet carrier (68) of the epicyclic gear (36). Alternatively, the fan (18) is secured to the planet carrier and the electric motor (70) is secured to the outer ring.The invention also relates to methods of using said turbofan engine, in particular for regulating the reduction ratio between the shaft and the turbine, for recovering kinetic energy or for taxiing.

An embodiment of the invention discloses a method and device for actualizing violation early warning. The method comprises: acquiring a key performance index data; comparing the key performance index data with a key performance index data early warning threshold, mapping the key performance index data which breaks through and / or rapidly approaches the key performance index data early warning threshold in the key performance index data to be a key quality index data; performing an early warning and a violation treatment based on key quality index data. The technical proposal in the embodiment of the invention reduces operating quantity of monitor by early warning and pre- acquiring, increases intervention time of the ISP internet, and increases the system performance.

The invention relates to joint node network equipment used for a mobile broadband multi-hop Ad Hoc network. The equipment comprises a quick deployment module, a gradient path module and a wireless link intelligent perception module, wherein the gradient path module is used for building neighbourhood between local nodes and other nodes and builds and maintains gradient routing to any nodes of the network by taking the neighbourhood as a basis, and provides the basis for data transmission; and the wireless link intelligent perception module is used for dynamically adjusting a physical layer to send parameters and reporting practical situations of a wireless link to an upper layer module, so as to enable the upper layer module to update the neighbourhood and route selecting. In the invention, the autonomously reaserched and developed gradient path module and the wireless link intelligent perception module are adopted, wherein the gradient path module achieves self configurating and self repairing functions of a link, is used for searching automatically and connecting adjacent wireless nodes, and automatically and quickly calculating out an optimal routing; the wireless link intelligent perception module can quickly perceive quick changes of the wireless link, improves the success rate of data transfer, provides the basis for intelligent routing, and quickly deploys efficient networking nodes.

The invention provides an oxygen concentration responsive polymer photoluminescence coating. The coating consists of an oxygen concentration sensitive function layer and a matrix resin layer mixed with nanoparticles, wherein the oxygen concentration sensitive function layer is distributed on the surface of the matrix resin layer mixed with nanoparticles. The oxygen concentration sensitive functionlayer is prepared from a metal ruthenium complex (oxygen sensitive probe molecules). The oxygen sensitive probe molecules are distributed on the surface of the polymer resin coating in the form of chemical bond and / or physical interaction, and the surface has a coarse structure of micro-nano scale due to doping of nanoparticles. The coarse surface structure and the surface distribution form of the probe improve the dynamic contact efficiency of the probe and oxygen molecules, so that the change speed of fluorescence emission light intensity is increased when the probe molecules respond to thechange of oxygen concentration on the surface of the coating, and noncontact detection of change of oxygen concentration or air pressure on the surface of the coating is realized through change of fluorescence intensity or fluorescence life of the coating. The coating is simple to prepare, has reversible response to oxygen and can be reused for a long time.

The invention provides a finger movement mode based Morse code character inputting system and method. Gesture signals are respectively obtained through a bioelectrical sensor arranged on the wrist and an acceleration sensor arranged on the thumb, then contact actions and contact time of fingers are obtained through signal processing, feature extraction and feature fusion, three actions of long-contact, short-contact and finger loosening are respectively mapped into tick, tock and blank space in a basically-formed unit of Morse codes, then corresponding characters are obtained according to character codes of the Morse codes, and accordingly Morse code input is achieved. The problem that a Morse code inputting device in the prior art needs a special device and is inconvenient to carry is solved. Due to the fact that the simple wearable sensors are arranged on the wrist and the thumb in the scheme, the device is very convenient to carry, does not need other complicated structures and is convenient to carry and use.

The invention belongs to the technical field of wireless communication, and discloses an unmanned aerial vehicle relay deployment method and system based on a particle swarm optimization algorithm. The unmanned aerial vehicle relay deployment method comprises the steps of: designing and defining a channel model of an unmanned aerial vehicle relay, calculating the large-scale fading path loss and small-scale fading of the unmanned aerial vehicle relay, and acquiring the channel gain and signal-to-interference-and-noise ratio of different equipment during connection; designing and defining an energy consumption model of an unmanned aerial vehicle relay, and defining power consumption compositions of the unmanned aerial vehicle in a hovering state; constructing an optimization target, and converting a constrained mixed 01 integer nonlinear programming problem into an unconstrained optimization problem; and optimizing the transmitting power of the terminal equipment, the candidate deployment position of the unmanned aerial vehicle relay and the association relationship of the terminal equipment, the unmanned aerial vehicle relay and the channel in combination with the improved particleswarm algorithm so as to realize the minimization of the total energy consumption of the system. According to the unmanned aerial vehicle relay deployment method, a standard particle swarm algorithmis improved, the unmanned aerial vehicle relay deployment method is more suitable for solving the optimization problem, and the execution efficiency of the algorithm is improved.

The invention discloses a reservoir level tester for a pumped storage power plant and an installation method of the reservoir level tester. The reservoir level tester comprises a test pipe, a floater, a stay cord and a level test device, wherein the test pipe perpendicular to a dam axis is mounted on a face of an upstream dam slope surface of a concrete-faced rockfill dam in the reservoir of the pumped storage power plant; an air vent is formed in the top end of the test pipe; a pipe orifice in the bottom of the test pipe is open; the floater is arranged on the water surface in the test pipe; the stay cord connected with a reservoir level sensing device is fastened at the top end of the floater; the reservoir level sensing device is mounted on a wave wall at the dam top; a rope winding type water level sensor and an electric hoist are fixed side by side on the top surface of a base of the reservoir level sensing device; and when the stay cord drives a rope winding disc to rotate, a switch wheel magnet ring switches the magnetic force lines of two magnetic-sensing elements after the transmission of a spindle and a gear set, and the two magnetic-sensing elements output sensing signals of the reservoir level. The reservoir level tester has the characteristics of wide range, high precision, high speed, reliability in operation, convenience in installation and capability of testing the level on an inclined plane of the dam slope, and is an instrument capable of outputting the reservoir level of the pumped storage power plant in real time.

The invention provides a high-accuracy and three-dimensional laser exposure curing process. The high-accuracy and three-dimensional laser exposure curing process comprises the following steps of S1, reading a three-dimensional vector diagram of an object to be processed; S2, calculating a three-dimensional exposure path of the object to be processed, and performing three-dimensional path interpolation according to the three-dimensional vector diagram; S3, calculating the distance between a beam expander and a three-dimensional dynamic focusing galvanometer in an optical axis direction in each time point laser processing equipment during actual processing according to the three-dimensional exposure path and parameter information of each lens in an optical path system of the laser processing equipment; S4, fixing the object to be processed in a three-dimensional rotation fixture system in the laser processing equipment; and S5, starting the laser processing equipment so that the three-dimensional fixture system and the three-dimensional dynamic focusing system simultaneously run. A high-speed and dynamic Z axis can be flexibly driven during the actual laser curing process, high-speed zoom of a laser spot is achieved; and since the actual focusing surface is a curved surface, the exposure curing process with regard to the cured surface can be achieved very well by employing the process, and high accuracy and high efficiency are ensured.

The invention discloses a device for clearing egg products. The device comprises a shell, a conveying mechanism, a spraying mechanism, a sweeping mechanism and a stoving mechanism, wherein the shell is provided with a conveying channel penetrating through two sides of the shell; the conveying mechanism is used for conveying egg products; the conveying mechanism comprises a conveying belt and multiple clamping units; the conveying belt passes through the conveying channel; the multiple clamping units are distributed along the length direction of the conveying belt; the clamping unit is used for clamping the egg products; the spraying mechanism is used for spraying cleaning fluid to the egg products and arranged inside the shell; the sweeping mechanism is used for sweeping the surfaces of the egg products, arranged inside the shell and distributed at the downstream side of the spraying mechanism; the stoving mechanism is used for drying the egg products, arranged inside the shell and distributed at the downstream side of the sweeping mechanism; the stoving mechanism comprises multiple stoving parts distributed at the periphery of the conveying belt; the stoving parts comprises air inlet pipes, support rods and multiple stoving units. The device for clearing egg products is good in egg product cleaning and stoving egg products, simple in structure and convenient to use.

The invention provides a spray pipe section structure and method for realizing a continuous variable mach number wind tunnel. The spray pipe section structure comprises a protective shell, a spray pipe section upper wall face, a spray pipe section lower wall face, a spray pipe section side wall, a rotary spray pipe, a rotary shaft, a driving device and a transmission force arm. The positions of the spray pipe section upper wall surface and the spray pipe section lower wall surface are fixed and are used for connecting a downstream experiment section and an upstream stable section of the spray pipe section structure. When the rotating spray pipe rotates around the rotating shaft under the transmission action of the transmission force arm and the power action of the driving device, self-adaptive backflow areas are formed at the upstream position and the downstream position of the rotating spray pipe, and the self-adaptive backflow areas are used for generating pneumatic wall faces, so that flowing in a flow field where the rotating spray pipe is located is kept smooth. The lower wall surface of the rotary spray pipe and the lower wall surface of the spray pipe section form a throat part, airflow reaches sound velocity at the throat part, and when the rotary spray pipe is rotated, the deflection angle is adjusted by changing the position of the throat part, so that the sound velocity reaches a specific Mach number based on the deflection angle, and the continuous variable Mach number wind tunnel is realized.

The invention discloses a control method and device of an electronic expansion valve. The control method comprises the steps that the maximum value and the minimum value, corresponding to the maximumvalue and the minimum value of the operation frequency of a compressor, of the opening degree of the electronic expansion valve are confirmed; the indoor real-time temperature is acquired, and the real-time operation frequency of the compressor is controlled; the change tendency of the real-time operation frequency of the compressor is calculated; if the real-time operation frequency of the compressor becomes larger, the opening degree of the electronic expansion valve within unit time becomes larger within a fixed time quantum in future, and the variable quantity of the opening degree of theelectronic expansion valve within unit time is increased gradually; and if the real-time operation frequency of the compressor becomes smaller, the opening degree of the electronic expansion valve within unit time becomes smaller within a fixed time quantum in future, and the variable quantity of the opening degree of the electronic expansion valve within unit time is increased gradually. The indoor temperature change speed is effectively increased, meanwhile, it can be effectively guaranteed that temperature changes are gentle, the indoor temperature is prevented from severely changing, and discomfort of indoor users is avoided.

The invention provides a hybrid energy storage system and a micro power grid system and aims to solve a problem that a hybrid energy storage system in the prior art requiring an energy management unit to determine charging / discharging power of a storage cell and charging / discharging power of a super capacitor is relatively complex to realize. The hybrid energy storage system comprises a first type bidirectional power converter, a first type energy storage device, a second type bidirectional power converter and a second type energy storage device, wherein a charging / discharging speed of the first type energy storage device during charging / discharging is changed by the first type bidirectional power converter according to a preset charging / discharging speed change rate when a value of a physical parameter of a bus changes; the charging / discharging speed of the first type energy storage type device during charging / discharging is not changed when the value of the physical parameter is equal to a first parameter value or a second parameter value; the second type bidirectional power converter is used for charging / discharging the second type energy storage device when the parameter value reaches a boundary value of a preset scope, the parameter value is made to not surpass the boundary value of the preset scope, and the first parameter value and the second parameter value are both in the preset scope.

The embodiment of the invention provides a PMD equalization method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a to-be-processed signal, and carrying out the pre-equalization processing of the to-be-processed signal through employing a radius guide linear Kalman RDLKF algorithm; determining a target state vector in the to-be-processed signal based on a pre-equalization processing process of the to-be-processed signal; determining tap coefficient initial values of a plurality of filters for performing equalization processing on the signal to be processed according to the determined target state vector; based on the initial value of the tap coefficient, determining the tap coefficient of each filter in the plurality of filters at the current moment by utilizing a first preset expression; and based on the tap coefficient of the filter at the current moment, performing equalization processing on the to-be-processed signal after pre-equalization processing. According to the embodiment of the invention, the convergence speed of PMD equalization can be improved.

The invention discloses a method and device for optimizing the instantaneous dynamic state of an LLC resonant converter load. Firstly, an actual test of a specific point is carried out on the LLC resonant converter; discrete points related to the LLC switching frequency, the input voltage, the output voltage and the output current are obtained; and fitting is carried out to obtain an optimal objective function of the LLC switching frequency, and then through dynamic load switching judgment, a final output PID result of the voltage loop controller linearly approaches an expected output value ofthe optimal objective function when a load suddenly changes. An effective LLC switching frequency target function is obtained through a simple fitting mode, and the PID output result of the voltage controller linearly approaches the expected value of the LLC switching frequency during dynamic load switching. According to the method, the calculation deviation and a large quantity of calculation caused by LLC small signal model modeling are avoided, and the change speed of the LLC switching frequency is increased, so that the dynamic response speed of the LLC is increased under the condition that the hardware cost of the system is not increased.

The invention provides a planar optical waveguide, a preparation method thereof and a thermo-optical device. The planar optical waveguide provided by the invention comprises substrate-inorganic material lower cladding-polymer core layer-inorganic material upper cladding, that is, the upper and lower claddings are both made of inorganic materials, and the core layer is a polymer and respectively controls the refractive indexes, thermo-optic coefficients and thermal conductivities of the inorganic material lower cladding, the polymer core layer and the inorganic material upper cladding to obtaina specific relationship of size, so that the optical field is effectively limited in the core layer by fully utilizing the characteristics such as thermal light and thermal conductivity of the inorganic material and the polymer, and the rate of change of the effective refractive index of the entire optical waveguide can be increased, thereby changing the phase of the optical field. The improvement of the characteristics of the above aspects can further effectively reduce the response time of the thermal light, improve the response speed, improve the response sensitivity of thermo-optical device, and is of great significance for obtaining a fast thermo-optical device.