36results about How to "Improve long-term operational stability" patented technology

The invention provides a ferronickel-based oxygen evolution electrode and a preparation method thereof based on interface confinement. The preparation method of the ferronickel-based oxygen evolution electrode comprises the following steps: preparing a precursor solution containing ferrous ions and ferric ions; the foamed nickel substrate is cleaned; the cleaned foamed nickel is tightly attached to the surface of the bottom of the reaction container, the foamed nickel is immersed in the precursor solution, under the room-temperature standing condition, divalent and trivalent iron ions are induced to be subjected to a synergistic hydrolysis and coprecipitation reaction through a physical interface confinement space formed by an attached interface, and the nickel-based composite material is obtained. Therefore, a high-activity and high-uniformity nickel-iron-based (oxygen) hydroxide catalyst layer (DIC-NiFeOOH / NF) is grown on the surface of the foamed nickel in situ. The method is simple in process, green and energy-saving, and the prepared nickel-iron-based oxygen evolution electrode shows excellent performance in oxygen evolution reaction and anion exchange membrane water electrolysis.

The invention discloses a trans-perovskite solar cell based on double boric acid group anchoring and a preparation method thereof. The solar cell comprises a substrate, an anode, a hole transport layer, a co-self-assembly molecular layer, a perovskite light absorption layer, an electron transport layer and a cathode which are stacked. The co-self-assembly molecular layer comprises a first self-assembly molecule and a second self-assembly molecule of an organic compound containing two boric acid anchoring groups and a conjugated skeleton; the conjugated skeleton has at least: an extended conjugated structure including an aryl group, a biaryl group, a plurality of aryl groups bridged by heteroatoms, a heteroaryl group, and a plurality of heteroaryl groups connected by chemical bonds; the regulating group comprises an atom or a group for providing lone pair electrons, or a substituent containing a halogen atom. According to the invention, collaborative optimization of the interface stability, the carrier extraction efficiency and the interface functionality is realized through the co-self-assembly molecular layer, and the photoelectric conversion performance and the stability of the solar cell are improved.

The invention provides a tree chip ejecting mechanism which is arranged on a rubber tapping machine body and comprises a tool bit driving part and a tool rest assembly. The tool bit driving part is provided with an elastic energy storage device, and the tool bit driving part slides to extrude the elastic energy storage device to store elastic potential energy; the tool rest assembly comprises a tool bar and a tool bit, and one end of the tool bar is movably connected with the tool bit. Wherein the elastic energy storage device and the cutter bar are correspondingly arranged, and after rubber tapping operation is completed, the cutter bar is impacted by releasing pre-stored elastic potential energy, so that the cutter head shakes to pop out attached tree chips. The rubber tapping tool bit cleaning device solves the problem of how to quickly clean the rubber tapping tool bit after rubber tapping every time so that the tool bit can be accurately attached to a tree trunk in the subsequent rubber tapping process.

The present application relates to the technical field of transmitter, in particular to a kind of anti-condensation wind pipe type temperature transmitter, including the mounting bracket of fixed installation in the side wall of ventilation pipe, humidity detection component is fixedly installed in mounting bracket, temperature sensing tube is rotatably installed outside humidity detection component, the motor for driving temperature sensing tube rotation is fixedly installed in the side wall of mounting bracket, the dew removal device for removing condensation is equipped outside temperature sensing tube, both ends of temperature sensing tube are equipped with plugging component, and plugging component removes the plugging of temperature sensing tube end when temperature sensing tube rotates.The present application utilizes low-temperature high-humidity condition to trigger temperature sensing tube rotation, removes condensation by centrifugal throwing, and cooperates with reciprocating scraping to completely remove surface condensation, simultaneously utilizes friction micro-heat to improve pipe wall temperature, which is higher than dew point temperature, to inhibit condensation from generating again from source, while ensuring temperature measurement accuracy, significantly reduces equipment power consumption, solves the problems of poor anti-condensation reliability, high energy consumption and serious temperature measurement drift of traditional products.

This invention relates to the field of safety monitoring technology for high-temperature molten salt storage tanks, and discloses a bottom leakage drainage and safety monitoring device and method for molten salt storage tanks. The device is integrally arranged within the bottom plate and foundation structure of the molten salt storage tank. By constructing a multi-layered structural system at the bottom of the tank that combines conductive leakage detection, anti-condensation heating, sand cushion layer drainage, and foundation settlement monitoring, comprehensive monitoring and graded alarms of leakage risk and structural safety status during the operation of the molten salt storage tank are achieved. The functional structures of this invention are mainly arranged within the foundation layer at the bottom of the tank, without altering the tank's structural form. Compared to invasive monitoring schemes or those requiring tank modifications, this invention has advantages such as lower engineering implementation difficulty, less impact on existing tank operation, and higher long-term operational stability, making it suitable for widespread application in existing solar thermal power plants.

The application belongs to the technical field of solid oxide fuel cell anode catalyst, and particularly relates to a preparation of a multi-doped layered perovskite anode and application thereof in ammonia solid oxide fuel cells. x Ba 1–x Mn 1–y TM y O 3–δ (0.4<=x<=0.6, 0<=y<=0.3, TM=Co, Fe, Cu), the precursor is phase changed under a reducing atmosphere to form a PrBaMn2O 5+δ layered perovskite with rich oxygen vacancies, and the doped transition metal is precipitated in the form of an alloy and anchored on the surface of the layered perovskite. The anode catalyst has a simple synthesis method, low cost, rich and flexible adjustable element composition. The obtained anode catalyst is made into a slurry and then assembled into a solid oxide fuel cell single cell sheet. The solid oxide fuel cell prepared by the application has good power output, electrical conductivity and stability at medium and high temperatures.

The present application relates to the field of wrench structure, disclose a kind of electric tightening wrench for nuclear power anchoring plate, including output shaft, torque sensor, counterforce component and rotary cooperation structure, output shaft is rotated by drive source;Torque sensor is used to detect torque;Counterforce component is connected with the torque sensor, for bearing reaction force when tightening;Rotary cooperation structure is arranged between the torque sensor and the output shaft, to enable the output shaft can be rotated relative to the torque sensor, and the torque sensor remains stationary when the output shaft rotates, to measure torque in dynamic tightening process in static mode.The beneficial effects of the present application are that the actual torque value is obtained in real time in a static mode, while overcoming the low precision defect of current control mode affected by load and voltage fluctuation, improving the precision and stability of torque measurement.

The invention belongs to the technical field of water treatment, and particularly discloses a matrix type separation filler structure which comprises a bearing component fixed in a pool body structure and extending in a second direction perpendicular to a first direction, and a plurality of separation plates arranged in sequence, the bearing component is provided with a gap, the gap is connected with the separating plates in an inserted mode, and each separating plate is provided with a protruding part protruding out of the bearing component. The separating plates and the bearing components are matched with each other to form channels distributed in a matrix mode, and the protruding parts and the gaps are matched to form freedom degrees between the separating plates and reduce brittle sediments attached to the interiors of the channels. The device has the following advantages that the integrity and stability of channel arrangement can be kept under the impact action of water to be treated, and the scattering and damage risks of the separation plates are reduced; brittle sediments in the channel are reduced through the degree of freedom and the shearing effect, and the risk that the channel is blocked due to deposited mud blockage is reduced, so that the separation capacity is favorably maintained, and the operation and maintenance burden is reduced.

GIS built-in installation structure and measurement method of optical fiber current sensor, the device includes a built-in GIS basin insulator triangular plate mounting base, and a number of consistent polarization maintaining fiber ring and signal transmission unit. The method comprises: 1) using external light source to generate light signal; 2) using polarizer to convert light signal into linearly polarized light; 3) transmitting linearly polarized light through signal transmission unit to polarization maintaining fiber ring, conductor flow in GIS device generates annular magnetic field, polarization maintaining fiber ring under the action of magneto-optic effect makes Faraday rotation of light signal, and the light signal after Faraday rotation is obtained; 4) using coupling analyzer to convert the light signal after Faraday rotation from polarization state change to light intensity change, and the light intensity signal is obtained; 5) using photoelectric detector to convert light intensity signal into electric signal, and the real-time current value of GIS device internal conductor is obtained, and displayed through current data display. The application realizes efficient and reliable integration of sensor and GIS device.

This invention relates to the field of industrial organic wastewater pretreatment technology, and proposes a non-powered automatic proportioning device for pretreatment of polysaccharide alcohol wastewater. The device incorporates a proportioning component on the wastewater inlet pipe. This component includes an axially movable proportioning slide and a linked Venturi channel. The proportioning slide contains a proportioning pipe connected to the drug supply chamber. The polysaccharide alcohol wastewater flows through the Venturi channel under its own transport pressure, creating a negative pressure at the throat and driving the proportioning slide to displace. This simultaneously opens the wastewater passage and draws in the treatment solution, achieving non-powered automatic proportioning and premixing under high-viscosity wastewater conditions. The device uses a three-way valve to switch between direct discharge and automatic proportioning modes, improving the stability and uniformity of water-chemical mixing during the pretreatment of high-viscosity polysaccharide alcohol wastewater without requiring external power for dosing.

The application discloses a detection system and method with an anti-vibration and sensitivity-enhanced gas photoacoustic in-situ detection mechanism, which comprises an excitation light source and a collimating assembly, a photoacoustic cell and a signal processing unit. The laser emitted by the excitation light source and the collimating assembly is arranged along the central axis of the photoacoustic cell. A plurality of groups of microphones are arranged on the central section of the photoacoustic cell. Each group of microphones comprises two microphones symmetrically arranged on the left and right sides or the upper and lower sides of the central section of the photoacoustic cell. The signal processing unit receives the signals of each microphone, processes the signals, and the central section of the photoacoustic cell is a section perpendicular to the axial direction of the photoacoustic cell and located in the middle of the photoacoustic cell. The excitation light source and the collimating assembly emit laser, the signal processing unit collects and processes the signals of the plurality of groups of microphones, and the concentration of the dissolved gas in the oil circuit is obtained according to the corresponding matching relationship between the signal processing result of the signal processing unit and the gas concentration.

The utility model relates to a modular monitoring equipment with temperature and humidity and smoke alarm function, including installation base, casing frame and monitoring module, the installation base is circular structure, and the even installation seat is installed on the installation base, and the casing frame is fixedly installed in the installation base lower extreme, and the casing frame inside is installed with monitoring module, and the monitoring module is used for monitoring temperature and humidity and smoke, the utility model discloses the modular layout of main control circuit, temperature and humidity sensor, smoke sensor, combines the design of special heat conduction hole and heat conduction sheet, establishes independent efficient radiating path for the electronic component of heating, and the circuit heat source is isolated with temperature sensor, effectively avoids the'heat pollution'problem caused by the equipment own work heat, ensures the authenticity and accuracy of temperature monitoring result.

This invention discloses a PLC dual-mode beacon time slot dynamic interleaving method and system, belonging to the field of power line carrier communication technology. It includes: analyzing real-time channel noise power and instantaneous signal-to-noise ratio (SNR) to generate a channel state attenuation coefficient; obtaining topology change frequency and beacon lifetime; calculating and mapping a network fluctuation index to generate a dynamic interleaving depth value; overlapping and recombining the duty cycles of beacon time slots and data time slots to generate a time slot resource pool; performing time-division interleaving mapping on beacon and data signals to generate a corresponding time slot mapping table; and performing trimming, insertion, segmentation, and padding processes, finally aligning and merging them into a dynamically interleaved frame structure and transmitting it through the link. This invention uses real-time channel noise and instantaneous SNR analysis, integrates jitter weighting from topology changes and beacon lifetime, dynamically generates interleaving depth values, and recombines time slot duty cycles, enabling adaptive optimization of the frame structure and improving power line communication efficiency.

A marine motor with eccentric end cover, comprising a frame, an end cover connected to the frame, a stator connected to the end cover in the frame, a bearing connected to the end cover, a rotating shaft connected to the bearing through a bearing bush, and a rotor corresponding to the stator and arranged on the rotating shaft; the axial center of the end cover is offset relative to the axial center of the rotating shaft, and the fit clearance between the bearing bush and the rotating shaft and between the stator and the rotor is adjusted by adjusting the offset degree of the end cover relative to the rotating shaft. The invention solves the problems of uneven distribution of bearing clearance and stator-rotor air gap caused by the self-weight sag of the rotating shaft in the traditional concentric end cover type marine motor, complicated assembly and debugging, and difficult on-site clearance correction.

This invention discloses a grating galvanometer device and its control system and method. The grating galvanometer device includes: a grating galvanometer motor with a motor output shaft; a galvanometer clamp mounted on the end of the motor output shaft for clamping and fixing a laser reflector; a triangular chuck-type quick clamp with one end coaxially fixedly connected to the motor output shaft; a DD motor with a motor output shaft, the other end of which is rigidly connected to the quick clamp to allow the motor output shaft to rotate coaxially with the galvanometer; and a motor bracket for supporting the grating galvanometer motor and the DD motor. This invention uses real-time feedback data from the DD motor as a precision benchmark, enabling the acquisition, modeling, and iterative correction of short-cycle errors during the operation of the galvanometer motor. This solves the short-cycle error problem existing in low-resolution grating galvanometer motors, achieves real-time correction of the galvanometer motor's angle positioning error, improves the accuracy and consistency of laser processing, reduces equipment hardware costs, and enhances adaptability to various working conditions.

The application discloses a three-level early warning processing method for sewage plant data anomaly detection, comprising the following steps: a data acquisition step; obtaining sewage plant operation data X from a database of a sewage treatment plant; a data preprocessing step; performing spatio-temporal correlation feature analysis, correlation analysis of abnormal data scenes and high-order nonlinear feature extraction on the sewage plant operation data X; a data analysis step; three-level early warning decision and root cause positioning; hierarchical response linkage and closed-loop management. The three-level early warning processing method for sewage plant data anomaly detection and the control method thereof have the advantages of improving the accuracy, explainability and engineering practicability of anomaly detection, providing strong support for intelligent and fine operation of the sewage treatment process and the like.

This invention discloses a method for collaborative startup, state synchronization, and anomaly recovery of a desktop intelligent agent system, belonging to the field of desktop software operation control technology. The method includes: a launcher process creating a named mutex and detecting the existence of an already running instance; activating the already running instance and terminating the current instance if one exists; and loading a local configuration file and verifying the integrity of key fields if no running instance exists. This invention avoids resource conflicts caused by repeated startups by using single-instance mutexes and activation of already running instances; improves recoverability after upgrades, migrations, and reinstallations through configuration completion, compatible migration, and failure rollback; enhances the availability of local sidecar services through gateway orchestration and health check mechanisms; improves state consistency between the main process, rendering layer, and gateway through a unified state bus; and reduces the frequency of manual intervention and improves long-term operational stability through an anomaly-level recovery mechanism.

This invention discloses an automatic spray fire prevention and dust suppression system for tunnels and roadways, relating to the field of fire protection equipment technology. It includes a baffle and a fixing plate. An internal frame is provided on the inner side of the baffle, and an auxiliary frame is installed inside the internal frame. A gear and rack transmission assembly is installed inside the auxiliary frame. A cleaning component for auxiliary linkage cleaning is installed at one end of the gear and rack transmission assembly. The cleaning component includes a sliding plate, a dustproof plate, and a connecting rod. The dustproof plate is integrally installed on the outer surface of the sliding plate. This automatic spray fire prevention and dust suppression system for tunnels and roadways, through the linkage between the cleaning component and the gear and rack transmission assembly, synchronously scrapes away dust and debris from the air inlet and surrounding areas as the piston reciprocates, preventing blockage of the air inlet valve assembly and ensuring smooth and stable air pressure intake. The overall structure can perform self-cleaning and self-lubrication while performing energy storage operations, reducing the frequency of manual maintenance and improving the long-term operational stability of the system.

This invention discloses a method for fabricating a perovskite solar cell optoelectronic module. After depositing the oxide layer and before P2 laser scribing, a pre-coating step is added: a heat-absorbing layer is pre-coated onto the oxide layer and cured. The heat-absorbing layer has a conduction band level greater than -5.43 eV and a conductivity greater than 10. ‑6 The material has an Ω / m density, and the heat-absorbing layer covers the P2 laser scribing area; the P2 laser scribing is performed using a laser in the 355-2000nm wavelength band. This invention can improve the long-term operational stability of the equipment and reduce equipment costs, thereby meeting the needs of large-format, high-efficiency production and enabling the mass production of this type of perovskite solar cell.

This invention relates to the field of polymer materials technology, specifically disclosing a low-roughness polyvinylidene fluoride (PVDF) tube, its preparation method, and its applications. The raw materials for preparing the PVDF tube include polyvinylidene fluoride resin and a nucleating agent, wherein the mass of the nucleating agent accounts for 0.02% to 0.75% of the mass of the polyvinylidene fluoride resin. The raw materials for preparing the PVDF tube of this invention include polyvinylidene fluoride resin and a very small amount of nucleating agent. The introduction of this very small amount of nucleating agent refines the grain size of polyvinylidene fluoride, improves the crystallinity of polyvinylidene fluoride, and significantly reduces the surface roughness of the PVDF tube, making the surface of the PVDF tube smoother and denser.

The invention discloses a single-phase power electronic voltage regulator, and belongs to the technical field of electric energy regulation. Comprising a parallel compensation circuit, a high-frequency resonance DC-DC circuit and a series compensation circuit, the high-frequency resonance DC-DC circuit is respectively connected with the parallel compensation circuit and the series compensation circuit to form an AC-DC, DC-DC and DC-AC three-stage electric energy conversion structure, and partial power conversion and bidirectional energy flow are realized; the series compensation circuit forms a series compensation power module by a plurality of full-bridge converters, the parallel compensation circuit is a set of single-phase full-bridge inverter, and the high-frequency resonant DC-DC circuit adopts a CLLC resonant topological structure; through the bidirectional transmission channel design of the three-stage AC-DC and DC-AC electric energy conversion structure and the high-frequency resonance DC-DC, compensation energy can be injected into a line when the voltage of the power grid is sag, and excess energy on the load side can be fed back to the power grid when the voltage is sag, so that the functional limitation that part of the existing schemes can only perform unidirectional compensation is solved, and the power grid voltage sag compensation device is suitable for being applied to the power grid. And full-type voltage abnormal working conditions of the power distribution system are adapted.

The utility model discloses a valve technical field's steam atomization synergic reinforced type water spray temperature reducing device, including pipeline, one end in the pipeline is installed with cage type temperature reducing pressure reducing structure, one side of cage type temperature reducing pressure reducing structure is opened with steam inlet, the other side of cage type temperature reducing pressure reducing structure is connected with steam nozzle, the side of pipeline far away from steam nozzle is opened with outer ring hole, the bottom of pipeline is connected with temperature reducing water pipe, the inside of temperature reducing water pipe is opened with temperature reducing water inlet, one end of pipeline inside is close to steam nozzle and is installed with temperature reducing water nozzle. The utility model discloses the cooperation setting of steam nozzle, temperature reducing water nozzle, temperature reducing water inlet and cage type temperature reducing pressure reducing structure, utilizes high -speed atomization steam and temperature reducing water direct impact, and atomization steam flow rate is far higher than temperature reducing water, can evaporate temperature reducing water fast, and temperature reducing water divides into many tiny water mist, thereby has promoted the atomization effect of temperature reducing water.

This utility model discloses a high-efficiency crushing device for organic fertilizer raw materials, including a conveyor frame, a feeding conveyor belt driven to move on the conveyor frame, a support frame on the conveyor frame, a first electric push rod on the support frame, a hammer plate at the bottom end of the first electric push rod, a second electric push rod on the support frame behind the first electric push rod, a pressing frame at the bottom end of the second electric push rod, a crushing roller mounted on the pressing frame via bearings, a crushing box at the output end of the feeding conveyor belt, two sets of crushing rollers mounted inside the crushing box via bearings, and a crushing motor mounted in conjunction with the crushing rollers, a conveyor box at the bottom end of the crushing box, and a spiral crushing and conveying structure inside the conveyor box. This utility model can realize continuous and integrated operation of organic fertilizer raw materials in the crushing process, reduce intermediate manual intervention, and at the same time, can realize automatic screening and cyclic crushing of unqualified crushed materials, thereby improving the crushing effect.

The invention discloses a preparation method of a low-temperature water-resistant sulfur-resistant copper-based small-pore molecular sieve catalyst. A silicon source, an alkali source, an aluminum source, a template agent, water, phosphoric acid and a mineralizing agent are used as raw materials to prepare an ammonium type small-pore molecular sieve, then the ammonium type small-pore molecular sieve is etched in an acid solution, a supplementary silicon source is added, the reaction continues, the obtained product is washed, dried and roasted to obtain the ammonium type small-pore molecular sieve with the surface being all silicon, and finally copper exchange is performed to obtain the copper-based porous molecular sieve. The low-temperature water-resistant sulfur-resistant copper-based small-pore molecular sieve catalyst is obtained. According to the method, surface engineering treatment is carried out on a precursor ammonium type small-pore molecular sieve of a conventional copper-based small-pore molecular sieve catalyst, selective atom etching and a directional silicon supplementing technology are combined, aluminum species on the surface of the molecular sieve are selectively removed, and silicon species are directionally introduced, so that a layer of stable pure silicon structure is constructed on the surface of the ammonium type small-pore molecular sieve; and then copper atoms are introduced to form the copper-based small-pore molecular sieve catalyst with a pure silicon structure on the surface, and the catalyst shows excellent low-temperature water resistance and sulfur resistance and long-term operation stability.

The invention provides a bus signal priority compensation control method and system based on green wave band protection. The method comprises the steps that trunk line green wave coordination parameters are acquired; collecting road traffic information, traffic signal state information and vehicle running state information; judging whether a bus priority triggering condition is met or not according to the collected information; when the trigger condition is met, executing a bus priority strategy, and determining additional phase time increased by the strategy in the current signal period; executing a phase compensation mechanism which specifically comprises the following steps: judging whether a non-coordinated phase has enough compensation capability in a current period; if there is enough compensation capability, compensation of the additional phase time is completed in the current period; and if the compensation capability is not enough, performing partial compensation by using the available compensation time of the non-coordinated phase in the current period, and distributing the residual disturbance time to the subsequent one or more periods to gradually complete compensation. According to the invention, the operation efficiency of buses and the overall traffic capacity of urban traffic are improved.

The invention relates to the technical field of charging piles, and discloses a direct current charging pile with an efficient heat dissipation function, which comprises a pile body, a charging cabin is mounted in the pile body, a charging module is mounted in the charging cabin, a heat dissipation assembly is arranged in the charging cabin, and the heat dissipation assembly comprises a plurality of composite substrates mounted on the surface of the charging module. An integrated circuit wire is arranged on the surface of the composite substrate and is electrically connected with a module, the surface of the composite substrate is covered with a bipolar heat-conducting glue layer, and the module is directly integrated into the composite substrate, so that thermal resistance and parasitic inductance caused by a traditional welding mode are reduced, and the heat dissipation efficiency and the electrical performance are remarkably improved; meanwhile, the bipolar heat-conducting glue layer can efficiently transfer heat generated by the module to the thermoelectric sheet through forced vertical heat conduction, the thermoelectric sheet achieves active refrigeration based on the Peltier effect, the heat is conducted to the radiator through the heat conduction belt, a synergistic heat dissipation system of active refrigeration and passive heat conduction is formed, and the problem of heat accumulation is effectively solved.

This invention provides a digital satellite modeling method, apparatus, device, storage medium, and product, relating to the field of satellite technology. The method includes: constructing a mechanistic model of the satellite; collecting on-orbit telemetry data measured during the satellite's on-orbit operation, and constructing a data-driven model based on the deviation data between the on-orbit telemetry data and the output results of the mechanistic model; predicting a basic satellite state prediction value at a future time using the mechanistic model, and predicting a deviation compensation value at the future time using the data-driven model; and correcting the basic satellite state prediction value based on the deviation compensation value to obtain a final satellite state prediction value. This invention can improve the prediction accuracy of digital satellite models.

This invention discloses a multimodal explosion-proof online hydrogen monitoring instrument and its monitoring method, relating to the technical field of gas safety monitoring and explosion-proof detection instruments. It includes an explosion-proof housing, a gas sampling and preprocessing module, a multimodal hydrogen sensing module, an associated gas compensation module, an in-situ calibration module, an edge computing and early warning module, a communication module, and a power supply module. The instrument collects hydrogen response signals, associated gas concentrations, environmental parameters, and sampling gas path state parameters; calculates dynamic reliability weights and measurement credibility; and performs multimodal concentration fusion, anomaly source differentiation, alarm gating, and in-situ calibration control. This invention addresses the problems of false alarms, missed alarms, and incorrect calibration caused by abnormal sampling gas paths, associated gas cross-interference, sensor drift, and difficulty in distinguishing between actual and false leaks in complex hydrogen-containing environments. It aims to improve the accuracy, anti-interference capability, alarm reliability, and long-term operational stability of online hydrogen monitoring.

The invention belongs to the technical field of distributed optical fiber sensing, and discloses a Brillouin dynamic grating reflection spectrum measuring device based on spectrum demodulation, which comprises a pump light source and a tunable laser, the pump light source is connected with the optical fiber coupler, a first output port and a second output port of the optical fiber coupler are respectively connected with input ports of the single side band modulator and the second polarizer, and an output port of the single side band modulator is connected with one end of the polarization maintaining optical fiber through the first polarizer; the output port of the second polarizer is connected with the first input port of the polarization beam splitter; an output port of the tunable laser is connected with a second input port of the polarization beam splitter through the third polarizer and the optical circulator, and a combined beam output port of the polarization beam splitter is connected with the other end of the polarization maintaining optical fiber; and a reflection port of the optical circulator is connected with an input port of the spectrograph. According to the invention, rapid, high-precision and low-cost measurement of the BDG reflectance spectrum is realized, and the method is especially suitable for dynamic distributed optical fiber sensing.

This invention relates to a method for preparing a perfluorinated carbon nanoemulsion hydrogen carrier and its application. (1) Polylactic acid-glycolic acid copolymer is dissolved in a solvent, perfluorinated carbon is added, and then a polyvinyl alcohol solution is added and mixed before ultrasonic treatment. The perfluorinated carbon includes perfluorohexane and perfluoronaphthane. (2) Polyvinyl alcohol solution is added to the ultrasonically treated solution in step (1) for homogenization, stirring, centrifugation, and washing to obtain nanoparticles. (3) The nanoparticles obtained in step (2) are dispersed in deionized water, and a surfactant is added and stirred to obtain the final product. The perfluorinated carbon nanoemulsion hydrogen carrier of this invention is used for efficient dissolution and transport of H2 to alleviate the limitation of H2 mass transfer, continuously provide reducing power for the microbial electrosynthesis process, and improve the yield, efficiency, and system stability of acetic acid without affecting the activity of microorganisms.