455results about How to "Increase output power" patented technology

The invention discloses a relativistic magnetron with angular slotting coupling output, the magnetron adopts a radial extraction rectangular output structure, the magnetron comprises an anode, a cathode and a magnet, the anode comprises a long anode block and a short anode block, the end part of the short anode block is provided with an angular coupling slot, the end part of the long anode block is provided with a reflection ring, and the end part of the short anode block is provided with an angular coupling slot. A high-frequency magnetic field is distributed in a fan-shaped cavity formed among the short anode block, the long anode block and the reflecting ring, and the high-frequency magnetic field is coupled into an external waveguide through the angular coupling slot to realize output; according to the relativistic magnetron disclosed by the invention, the adopted output structure is positioned at the end part of the anode block, and all the resonant cavities participate in microwave energy extraction, so that the angular periodic symmetry of the resonant cavities is hardly influenced by the output structure; and the coupling output structure and the output structure are axially separated from the resonant cavity area, the external space of the resonant cavity can be used for arranging magnets, the excitation space is small, and the realization of light and small size of the system is facilitated.

The invention relates to an MPPT (Maximum Power Point Tracking) control method based on dynamic optimization of a lightweight convolutional neural network, and belongs to the field of artificial intelligence control power tracking. The method comprises the following steps: S0, constructing a convolution-fuzzy neural network model which at least comprises an input layer, a convolution layer, a fuzzy control layer, a deep reinforcement learning layer and an output layer; s1, key parameters of photovoltaic equipment are collected in real time to serve as input data of an input layer; s2, performing convolution operation on the input data by using a convolution layer, extracting a feature vector, and transmitting the feature vector to a fuzzy control layer; s3, combining a fuzzy control layer with a deep reinforcement learning layer, and dynamically adjusting an optimization process of a fuzzy rule through a reward signal; and S4, the fuzzy control layer generates a control signal, and the control signal is transmitted to a DC / DC converter of the photovoltaic system through the output layer. The control method is suitable for a dynamic environment of a photovoltaic power generation system, can be expanded to a grid-connected system, and provides a new thought and technical support for efficient operation of photovoltaic power generation.

The invention relates to the technical field of power-assisted robots, in particular to a self-adaptive control lower limb hydraulic power-assisted exoskeleton robot system which comprises a waist supporting device, a leg supporting device, a foot supporting device, a hydraulic power-assisted assembly, an attitude sensor, a lower limb force sensor, a wearable electromyogram sensor, a step obtaining module and a data analysis module. The system can intelligently adjust the output power of the hydraulic power assisting assembly according to the motion posture of the exoskeleton, the pressure data of the foot supporting device and the wearing target muscle state so as to provide proper walking assisting power and bearing support, and the system can further conduct secondary adjustment and fatigue alarm by monitoring the pace frequency and the muscle fatigue degree in real time. The exoskeleton assisting power output power in the carrying process is gradually adjusted according to the comparison result between the weight of the wearing target and the weight of the to-be-moved object, so that assisting power provided by the exoskeleton robot is effectively matched with the weight of the to-be-moved object when the wearing target carries the object.

The invention provides a hovering type wireless charging control method for an electric power inspection unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. According to the technical scheme, firstly, modeling is conducted on a multi-transmitting-stage magnetic coupling type wireless electric energy transmission system, then directional constant-voltage output parameters of a wireless charging system in a coil offset state are determined, and control parameters of the wireless electric energy transmission system of the unmanned aerial vehicle are determined; on the basis, modeling is carried out for unmanned aerial vehicle power inspection power consumption and the charge state, and multi-source disturbance suppression parameters of the unmanned aerial vehicle and attitude track full-time-domain preset time control parameters of the unmanned aerial vehicle are determined. According to the method, a multi-transmitting-stage MCR-WPT system is adopted, a directional constant voltage output model is constructed, meanwhile, a charging system control strategy is optimized, and a wireless charging scheme based on an LCC-S type compensation network is designed. According to the invention, the transmission efficiency and stability of the wireless charging system of the electric power inspection unmanned aerial vehicle are improved, and the hovering wireless charging control precision of the electric power inspection unmanned aerial vehicle is improved.

The invention provides a high-power charging pile self-adjusting method, medium and system for a high-temperature environment, and belongs to the technical field of electrical variable measurement, and the method comprises the steps: extracting time domain features and frequency domain features of an environment parameter, a charging temperature, an input parameter and an output parameter; a correlation matrix of each parameter is calculated through a Pearson's correlation coefficient and principal component analysis, and a stability matrix and a variability matrix are obtained through singular value decomposition. Based on the two matrixes, an autoregressive integrated moving average model and a conditional autoregressive model are respectively constructed, and the long-term trend and short-term fluctuation of each parameter are predicted. And then establishing a game model, and solving to obtain an optimal output parameter by taking the long-term stability and the short-term stability of the output parameter as a target, and taking the optimal output parameter as a charging pile output parameter in a next time period. The charging process is continuously optimized with the preset duration as the cycle period, and the technical problem that real-time optimization of charging adjustment is difficult to achieve due to the fact that an existing charging control technology is mainly based on a single temperature threshold value is solved.

The present invention provides a rotation driving device and an LED light strip rotation imaging device, wherein the rotation driving device comprises a motor for driving the LED light strip to rotate, a control panel for controlling the operation of the LED light strip, a receiving coil for receiving electromagnetic energy to supply power to the LED light strip, a transmitting coil for transmitting electromagnetic energy to the receiving coil, and a wireless transmitting panel for controlling the transmitting coil; the motor comprises a stator and a rotor rotatably installed in the stator, the transmitting coil and the receiving coil are respectively arranged as flat coils, the receiving coil and the transmitting coil are respectively arranged around the rotor, and the transmitting coil and the receiving coil are arranged in parallel and at intervals. In the process of wireless power supply, since the transmitting coil and the receiving coil are integrated in the rotor part of the motor, a strong eddy current effect will not be generated in the entire motor, thus avoiding eddy current heating in the motor and causing failure, reducing energy loss in the process of wireless power supply, shortening the distance between the transmitting coil and the receiving coil, and improving the wireless transmission efficiency of electromagnetic energy.

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

The invention discloses a passive optical fiber stimulated Brillouin scattering effect threshold value self-adaptive testing device, and relates to the field of narrow linewidth optical fiber lasers, the device comprises a laser, a monitoring module and a driving power supply, the driving power supply is connected with the laser and the monitoring module, the laser is connected with the monitoring module and a passive optical fiber, and the monitoring module is connected with the passive optical fiber. The laser device generates signal laser and transmits the signal laser to the passive optical fiber so that the passive optical fiber can reflect reverse return light to the monitoring module, the driving power source drives the laser device and improves the output power of the laser device to preset first power, and the monitoring module monitors the return light power of the reverse return light and sends the signal laser to the passive optical fiber when the return light power is larger than preset second power. A stimulated Brillouin scattering threshold value is determined according to the light return power, and when the stimulated Brillouin scattering threshold value is larger than preset first power, the monitoring module judges that the passive optical fiber meets the stimulated Brillouin scattering threshold value requirement. Compared with manual testing, the method has the advantage that the detection efficiency of the SBS threshold value of the passive optical fiber is improved.

The embodiment of the invention provides a photovoltaic module control device, and the device comprises at least one bypass module which is used for being connected with at least one photovoltaic module in parallel; the driving circuit is used for driving at least one bypass module to work under the control of the controller; the power supply module is used for obtaining electric energy from the at least one photovoltaic module and outputting the electric energy to the controller under the condition that the at least one photovoltaic module works normally and the at least one photovoltaic module is bypassed; and the controller is used for controlling the conduction state of the at least one bypass module so as to control whether the at least one photovoltaic module is in the bypass mode or not. The power consumption of the control device is greatly reduced, meanwhile, the problem of voltage stress borne by the first series switch tube in the series control device when the first series switch tube is disconnected is solved, and the safety performance of the bypass control device is improved.

The invention discloses a low-voltage gallium nitride power amplifier based on second harmonic suppression. The low-voltage gallium nitride power amplifier is used for solving the technical problem that the overall efficiency of a radio frequency system is low due to an existing radio frequency power amplifier. The amplifier comprises an input stage circuit, an input stage low-voltage gallium nitride transistor, an intermediate stage circuit, an intermediate stage low-voltage gallium nitride transistor, an output stage circuit, an output stage low-voltage gallium nitride transistor group, a drain bias capacitor, a drain bias voltage port and a secondary harmonic suppression output matching network, by arranging an input-stage low-voltage gallium nitride transistor, an intermediate-stage low-voltage gallium nitride transistor, an output-stage low-voltage gallium nitride transistor group, a secondary harmonic suppression output matching network and a corresponding connection relationship, the secondary harmonic suppression output matching network can be used for suppressing a low-voltage gallium nitride transistor on the basis of a low-voltage gallium nitride process technology. Harmonic suppression is directly carried out on the second harmonic, so that the output power and the power additional efficiency of the radio frequency power amplifier are improved, and the overall efficiency of a radio frequency system is improved.

The invention discloses a hydrogen fuel cell hybrid power system grid-connected control method, which comprises the following steps of: analyzing and establishing a plurality of models of a system, comprehensively considering a plurality of cost weights on the basis of a hydrogen consumption model of the system, and constructing a comprehensive cost function; establishing a system operation state model; the speed, the acceleration and the system operation state serve as input of a self-adaptive Elman neural network together, a state transition matrix real-time correction factor of the system in the state is obtained, and a basic state transition matrix is adjusted through the real-time correction factor to obtain a real-time state transition matrix after the influence of the current driving condition on system state transition is considered; and according to the real-time state transition matrix, predicting the system demand power within a period of time, solving the comprehensive cost to enable the cost to be minimum, and completing the power distribution between the multiple stacks of fuel cells and storage batteries. According to the method, the fuel economy of the system is ensured, the internal balance of the multi-stack fuel cell system is improved, the service life of the system is prolonged, and the real-time prediction capability of the system is improved.

The invention discloses a device for realizing low-loss work of a long-wave infrared femtosecond optical parametric oscillator, which belongs to the field of optical parametric oscillators and comprises a pumping source, a pumping focusing lens, a long-wave infrared nonlinear crystal cut at a Brewster angle, a laser medium dichroscope and an output coupling mirror. Wherein the nonlinear crystal meets the I-type phase matching condition for the optical parameter process, and the front and rear surfaces of the crystal cut the central wavelength of the oscillated signal pulse at a Brewster angle so as to reduce the loss of the pulse in the resonant cavity. According to the long-wave infrared femtosecond optical parametric oscillator, the limitation of residual loss of a crystal antireflection film is broken through by adopting Brewster angle cutting on the crystal, so that the construction of the femtosecond optical parametric oscillator based on the long-wave infrared nonlinear crystal becomes possible, and the bottleneck of the existing long-wave infrared femtosecond optical parametric oscillator in the aspects of wavelength tuning range, output power and the like is expected to be broken through; and a practical low-cost technical scheme is provided for construction and application of the long-wave infrared femtosecond optical parametric oscillator.

The invention relates to a 213nm all-solid-state deep ultraviolet laser and application thereof, and belongs to the technical field of lasers. The laser comprises a laser diode, a pump light focusing system, a pump end mirror, a laser crystal, a deep ultraviolet output mirror, a sum frequency crystal, a frequency doubling crystal and a total reflection end mirror which are sequentially arranged along a light path, the pump end mirror, the deep ultraviolet output mirror and the total reflection end mirror form a V-shaped resonant cavity, and the laser crystal, the sum frequency crystal and the frequency doubling crystal are all cuboids. And birefringence main shafts of the laser crystal, the sum frequency crystal and the frequency doubling crystal are arranged in a staggered manner. Visible red light with the wavelength of 640 nm is adopted as fundamental frequency laser, only two-step frequency conversion is needed for output from the fundamental frequency laser to 213 nm, and the laser has the advantages of being simplified in process, small in size, easy to adjust, high in conversion efficiency, large in output power, low in manufacturing cost, stable in performance and the like.

The invention discloses a novel vortex electronic water pump for a thermal management system of an electric vehicle. The novel vortex electronic water pump comprises a pump body sub-component, a motor body sub-component and a water pump motor controller, the vortex pump shell, the vortex pump waterproof sleeve and the motor shell are connected and fixed through five screws; and mechanism assembly of the pump body sub-component and the motor body sub-component is completed. A water pump motor controller is connected and fixed in a cavity at the rear end of a motor shell through screws, then a three-phase power supply terminal connecting line and a power supply connector terminal connecting line of a confluence plate binding post are welded and fixed with a circuit board of the water pump motor controller, and a rear cover and the motor shell are screwed and fixed through four screws. The vortex electronic water pump has the working characteristics of large flow, high lift, low noise, safety and reliability, is an energy-saving and environment-friendly high-tech product, and is particularly suitable for an electric vehicle thermal management system with higher requirements on modularization, light weight and integration; the vortex electronic water pump is compact in structure, good in sealing performance, low in cost and easy to assemble and maintain.

The invention provides an X-ray photovoltaic radiation cell based on a gallium-containing semiconductor and a preparation method of the X-ray photovoltaic radiation cell. The gallium-containing semiconductor X-ray radiation photovoltaic cell comprises a gallium-containing semiconductor transduction unit and an X-ray radiation source 55Fe arranged on the semiconductor transduction unit, wherein the semiconductor transduction unit containing gallium comprises at least one of GaAs (gallium arsenide), GaInP (gallium indium phosphide), GaP (gallium phosphide) and Ga2O3 (gallium trioxide). According to the invention, the structure of a radiation photovoltaic cell is adopted, the output power density of an X-ray radioactive source 55Fe can be effectively improved, the penetration depth of the X-ray source 55Fe in a semiconductor can be effectively shortened by taking GaAs, GaInP, GaP and Ga2O3 as semiconductor materials, and meanwhile, the collection capability of current carriers is effectively improved by adjusting the total thickness of a semiconductor transduction unit and the doping concentration of each layer, so that the performance of the X-ray source 55Fe is improved. And finally, the preparation of the X-ray radiation photovoltaic cell with high output power and high energy conversion efficiency is realized.

The invention provides a hydrogen energy power system suitable for a magnetic suspension railway vehicle. The hydrogen energy power system comprises a hydrogen storage system, a hydrogen fuel cell system, a heat dissipation and cooling system, an air filter, a connector and an electronic control unit (ECU). The hydrogen storage system comprises a hydrogen storage control unit (HSU), the hydrogen fuel cell system comprises a power control unit (PCU), and the ECU is used for collecting and processing state information of each system and sending out a control instruction; the ECU is connected with the PCU and the HSU, and the ECU serves as a main control unit and is responsible for receiving an instruction from a vehicle or a train operator and coordinating work of the PCU and the HSU according to the current running state of the vehicle; and the ECU sends a power demand instruction to the PCU and sends a hydrogen supply instruction to the HSU so as to ensure that the fuel cell can output corresponding power according to needs. The engineering construction cost of the track in the project is reduced, the project construction time is saved, funds are saved, and the method is environment-friendly.

The invention discloses a dual-channel bidirectional DC / DC power supply module capable of realizing multiphase interleaved parallel connection, and belongs to the field of power supply management. The dual-channel bidirectional DC / DC power supply module comprises a dual-channel bidirectional DC / DC controller, a switch tube, an energy storage inductor, an energy storage capacitor, a sampling resistor and a peripheral auxiliary resistor capacitor, in addition, two channel high-voltage ports, two channel low-voltage ports, two channel enabling ports, a direction control port, a current configuration port, a clock output port, a clock input port and a multi-phase operation phase configuration port are arranged. Two-channel bidirectional energy flow can be realized by using four switching tubes, phase configuration can be performed on a multi-power module system to realize multi-phase interleaving parallel operation, output voltage ripples are reduced, output power is improved, single-channel current can be configured through a current configuration port, and automatic current sharing of multi-phase interleaving parallel operation is realized. The size of a power system is reduced, complexity and cost of a power control system are reduced, and power supply reliability is improved.

The invention provides a novel high-power low-ripple-output hydrogen production converter and a control method. The novel high-power low-ripple-output hydrogen production converter comprises a six-pulse conversion unit, a filter circuit and a three-phase stacked interleaved Buck circuit. The six-pulse commutation unit is connected in series with the filter circuit, then is connected in series with the three-phase stacked interleaved parallel Buck circuit 3, and finally is connected with a load. And the direct-current voltage of the converter is changed by controlling the phase of the trigger pulse of the thyristor valve so as to realize six-pulse direct-current power transmission. The main branch of the three-phase stacked interleaved parallel auxiliary branch is used for realizing power transmission, and the auxiliary branch is used for eliminating output current ripples. A voltage-current double closed-loop control strategy can ensure that each phase of the main branch realizes a good current sharing effect; alternating current component complementation and ripple complementation of the current IAX and the current IdcMain can be achieved by controlling the auxiliary branch switching tubes SAX1 and SAX2, then zero ripple of the output current Idco of the converter is achieved, and control over the auxiliary branch is completed. According to the invention, high-power low-current ripple output can be realized in a low-voltage high-current scene.

The invention belongs to the field of waste heat recovery, and particularly relates to a tail gas thermoelectric generator with a perforated plate structure, which comprises a tail gas heat exchanger, a perforated plate, a thermoelectric module and a cooling water heat exchanger, the thermoelectric module is arranged between the tail gas heat exchanger and the cooling water heat exchanger, and the perforated plate is arranged in the tail gas heat exchanger. The number of the perforated plates is set according to the number of the thermoelectric modules, the thermoelectric modules are arranged in n rows in the tail gas flowing direction, the number of the perforated plates is m, when the row number n of the thermoelectric modules is larger than or equal to 2 and smaller than or equal to 3, the perforated plates are arranged in the middle of the thermoelectric modules in the second row, and when the row number n of the thermoelectric modules is larger than or equal to 4, the perforated plates are arranged in the middle of the thermoelectric modules in the second row. And the perforated plate is arranged in the middle of the thermoelectric module with the multiple of 3. The performance of the tail gas thermoelectric generator can be effectively improved, the surface temperature non-uniformity of the generator is improved, and the equipment reliability is improved.

The invention discloses an integrated electric control permanent magnet motor integrated electric bamboo raft propeller which comprises a control handle, a rack operating lever, a rack, a propeller, a fan lower support, a fan, a fan upper support, a control box upper cover, a control box base, a motor, a ship networking module, a controller, a control box sealing gasket and an integrated display screen. The front end of the support is connected with an operating rod, the front end of the operating rod is provided with a control handle, the tail portion of the support is connected with a propeller, the support is provided with a motor, the front end of the motor is provided with a fan through a fan lower support and a fan upper support, and the motor is provided with a control box composed of a control box upper cover, a control box base and a control box sealing gasket. A ship networking module and a controller are arranged in the control box, and an integrated display screen is further arranged on the control box. The motor, the controller, the Internet of Things and other components are integrally designed, connection and wiring between the components are reduced, and the reliability and compactness of the system are improved. Meanwhile, installation and maintenance are convenient.

The invention discloses a multi-frequency amplification device. The multi-frequency amplification device comprises a plurality of narrowband input amplification modules, a plurality of power supply change-over switches and a broadband output amplification module, each input end of each narrowband input amplification module receives each input signal; the output ends of the narrowband input amplification modules share a compound contact; each narrowband input amplification module is connected with the input end of the broadband output amplification module through the reconnection point; the output end of the broadband output amplification module outputs signals of different frequency bands; and each power supply change-over switch is correspondingly connected with the power supply end of each narrowband input amplification module and is used for controlling and switching any narrowband input amplification module to work. According to the scheme, the insertion loss of each narrowband input amplification module is reduced, and each narrowband input amplification module can meet the conditions of signal gating and matching optimization in the respective working frequency band, so that the output power, efficiency and amplification gain of the multi-frequency amplification device are improved.

The invention discloses a manufacturing method and device for a multi-core optical fiber with a high SBS threshold value and application. The manufacturing method comprises the steps that S1, preparation work before drawing is conducted with the multi-core optical fiber as a raw material; s2, the wire drawing speed of the multi-core optical fiber is controlled to be gradually increased to 25 m / min from 14 m / min; s3, after the wire drawing speed reaches 25 m / min, the wire drawing speed of the multi-core optical fiber is controlled to be gradually reduced to 14 m / min from 25 m / min; s4, alternately carrying out the step S2 and the step S3 until the whole multi-core optical fiber is drawn; and S5, cutting the multi-core optical fiber prepared in the step S4 to prepare the conical multi-core optical fibers in batches. According to the technical scheme provided by the invention, the technical problems of complex equipment, tedious operation and relatively high cost existing in a mode selection mode adopted in manufacturing of the multi-core optical fiber in the prior art are solved.

The invention discloses a control method and device of a wind generating set and a program product. In the method, operation parameters of the wind generating set are obtained; under the condition that the operation parameters meet the control conditions, it is determined that the wind generating set is in the grid-connected rotating speed control stage, the control parameters are obtained, and the first corresponding relation between the control parameters and the pitch angle is obtained; determining target pitch angle data corresponding to the control parameters according to the control parameters and the first corresponding relation between the control parameters and the pitch angles. The determined target pitch angle data is the pitch angle data when the wind generating set achieves the better output power in the current operation state. And controlling the wind generating set according to the target pitch angle data. Therefore, in the grid-connected rotating speed control stage, the pitch angle of the wind generating set is optimized according to the control parameters, so that the output power of the wind generating set is improved, and the generating capacity of the wind generating set is improved at a low wind speed.

The invention discloses a voltage-matched two-end perovskite-crystalline silicon laminated assembly and a preparation method thereof, the laminated assembly comprises a perovskite top assembly and a crystalline silicon bottom assembly, the perovskite top assembly comprises a plurality of square perovskite assemblies, the square perovskite assemblies are provided with perovskite battery pieces in a laser scribing mode, and the perovskite battery pieces are arranged on the crystalline silicon bottom assembly. The adjacent perovskite cell pieces are connected in series and in parallel, the crystalline silicon bottom assembly comprises a plurality of crystalline silicon cell pieces connected in series and in parallel, the perovskite top assembly and the crystalline silicon bottom assembly are independently stacked, and the MLPE assembly is connected to one side of the crystalline silicon bottom assembly in series and is integrally connected with the perovskite top assembly in parallel. The top assembly adopts a splicing mode, efficiency loss caused by area expansion of a single perovskite assembly is avoided, the bottom assembly adopts a high working voltage and an MLPE assembly, and when the environment temperature changes, the working voltage of the bottom cell assembly can be adjusted, so that the bottom cell assembly is matched with the top cell assembly; compared with a conventional four-end assembly, the system installation cost is reduced, and meanwhile the power generation capacity of the four-end assembly is reserved.

The utility model discloses a battery module, and relates to the technical field of power supply equipment. The battery module comprises a battery cell and a protection plate, wherein the battery cell is provided with at least two tabs; wherein each tab comprises a first plate section and a second plate section which are connected with each other, the first plate section is electrically connected with the battery cell, the second plate section is electrically connected with the protection plate, at least part of the second plate section is overlapped with the protection plate, the width of the second plate section is smaller than that of the first plate section, and the width of the second plate section is smaller than that of the first plate section. And the through-flow area of the second plate section is greater than or equal to that of the first plate section. According to the scheme, the problem that the current battery module cannot give consideration to both small size and relatively high output power can be solved.

The invention discloses a single-frequency fiber laser capable of inhibiting a nonlinear effect, and provides a single-frequency fiber laser capable of prolonging the length of a gain fiber and inhibiting the nonlinear effect in the fiber laser to solve the problem that the existing single-frequency fiber laser structure cannot inhibit the deterioration of line width caused by various nonlinear effects while realizing hectowatt-magnitude power single-frequency laser output. And line width broadening caused by the cavity length is compensated based on a self-injection locking line width narrowing optical path. And meanwhile, a phase-shift long-period fiber grating is adopted to inhibit excitation of various nonlinear effects (such as a stimulated Raman scattering effect, a stimulated Brillouin scattering effect and a nonlinear refraction effect) in a self-injection locking line width narrowing light path and a light energy amplification process. Stable hectowatt power single-frequency laser output can be realized, and the influence of the nonlinear effect in the fiber laser on the output line width can be effectively inhibited in the subsequent MOPA structure.

The embodiment of the invention provides a battery assembly and a cleaning method of the battery assembly. The battery assembly comprises an electric pile, a water inlet assembly and a water drainage assembly. Wherein the electric pile comprises two end plates, and an electrode plate and a membrane electrode which are positioned between the two end plates, the first end plate of the two end plates is provided with a water inlet, and the second end plate of the two end plates is provided with a water outlet; the water inlet assembly is connected with the water inlet of the first end plate and is used for introducing water flow into the electric pile so as to clean the electrode plate and the membrane electrode through the water flow; and the drainage assembly is connected with the drainage port of the second end plate and is used for draining water flow in the electric pile. The water inlet and the water outlet are additionally arranged, impurities entering the cathode electrode plate and the membrane electrode along with air are discharged through water washing, the performance of the membrane electrode and the electrode plate is effectively improved, the output power of the electric pile is further improved, and the service life of the electric pile is prolonged.

The invention provides a design of a low-voltage large-current multi-path interleaved parallel direct-current converter. High-voltage output is achieved through a train storage battery, multi-path interleaving parallel connection is adopted, output current ripples and power loss are effectively reduced, large-current output and power density improvement are achieved, electrical stress borne by power devices is reduced, device loss is reduced, the service life of the devices is prolonged, branch inductive current ripples are mutually restrained at the input end, and the output voltage is improved. And the input current ripples are effectively reduced. And moreover, automatic switching of voltage control modes is realized through software control, the adaptability to voltage regulation under different working conditions such as light load and normal conditions is obviously improved, and the output voltage requirements under various conditions are met. Meanwhile, when a branch fault occurs, the fault branch is quitted from running, other branches are organized to continue running, and the running reliability of the equipment is improved.

The invention discloses a mid-infrared and far-infrared heterogeneous integrated optical fiber combiner and a preparation method thereof, and belongs to the technical field of mid-infrared optical fiber devices.The combiner comprises six sulfur-based chalcogenide optical fibers with the working wave band being 3-5 microns and four Te-based chalcogenide optical fibers with the working wave band being 7-11 microns, the six sulfur-based chalcogenide optical fibers and the four Te-based chalcogenide optical fibers are mixed in a heterogeneous mode, and ten input optical fibers are closely arranged according to a regular triangle; beam combination transmission is formed by optimizing a low-temperature fused biconical taper process, the optical fiber is precisely welded with an output optical fiber with a slightly large core diameter, and finally the optical fiber is packaged. The beam combiner realizes broadband efficient laser transmission, has the characteristics of excellent beam quality, high synthesis efficiency, large total output power, compact structure and strong stability, and can be widely applied to the fields of optical fiber sensing, laser processing, national defense and the like.

The invention discloses a four-switch Buck-Boost converter circuit for photovoltaic maximum power point tracking. The four-switch Buck-Boost converter circuit comprises a main circuit module, an input voltage detection module, an output voltage detection module, an output current detection module, a control output module and a driving amplification circuit module. The control output module comprises a micro-control unit, and the micro-control unit is provided with an ADC sampling interface and a PWM output interface. The main circuit module processes the input voltage of the photovoltaic panel and outputs direct current to charge the battery; the input voltage detection module, the output voltage detection module and the output current detection module are used for sampling the input voltage, the output voltage and the output current of the main circuit module and transmitting sampling values to the micro-control unit; the micro-control unit judges the mode of the main circuit module according to a sampling value, a PWM signal is output by the PWM output interface through an improved maximum power point tracking algorithm, and the on and off of a switching tube of the main circuit module are controlled through the driving amplification circuit module.