237results about How to "Responsive" patented technology

The invention relates to the technical field of terahertz, in particular to a terahertz sensor array design optimization method based on metasurface enhancement, which improves the performance of the terahertz sensor array in the aspects of sensitivity, resolution, frequency response and the like through multi-dimensional optimization design, obtains initial parameters of the array based on a physical model, and improves the accuracy of the design of the terahertz sensor array. By optimizing the structure and the arrangement mode of the metasurface unit and combining electromagnetic simulation analysis, the transmission efficiency and the phase regulation and control capability of terahertz waves are improved, the performance change of the sensor under high-temperature and high-stress conditions is evaluated through thermal effect and stress field simulation, the stability and the reliability of the sensor in a complex environment are ensured, and the application range of the sensor is widened. Based on laboratory testing, data of key performance indexes such as sensitivity, resolution and response time are fed back, design parameters are adjusted, and iterative optimization is completed; according to the invention, through combination of multi-dimensional simulation and experimental feedback, the performance and environmental adaptability of the terahertz sensor array are significantly improved, and the terahertz sensor array is suitable for wide terahertz detection application.

The invention provides a large model service system and method, computer equipment and a readable storage medium. A cue word engineering module configures a cue word template; generating a target text according to the prompt word selected by the user; the retrieval enhancement generation module receives a basic text uploaded by a user, converts the basic text into word vectors, stores the word vectors in a database, and retrieves prompt words from the database according to question information input by the user to generate a target text; the plug-in development module receives the configuration file, analyzes the configuration file to obtain API interface information, calls extended data to retrieve cue words, and generates a target text based on the cue words; and the agent module defines the execution combination and sequence of the cue word engineering module, the retrieval enhancement generation module and the plug-in development module according to the user-defined operation of the user on the system execution chain. By adopting the method, the flexibility of large model service, the efficiency of model retrieval and the safety of model service are improved, diversified business scene requirements are further met, and the user experience is improved.

The invention discloses a monitoring and early warning method for wind-induced abnormal vibration of a cable-stayed bridge cable, and the method comprises the steps: calculating an energy concentration coefficient R according to a vibration intensity peak value P1st corresponding to a first large peak value and a vibration intensity peak value P2nd corresponding to a second large peak value; adding the energy concentration coefficient R into the array {R} to obtain an array {R} of bmin, and calculating the acceleration root mean square of the vibration acceleration data of the inhaul cable bmin according to the vibration acceleration data of the inhaul cable bmin; if k continuous energy concentration coefficients R in the array {R} of bmin exceed the early warning lower limit value and the acceleration root mean square exceeds the acceleration RMS upper limit threshold value, an early warning signal is sent out. The method has universality and effectiveness in identifying the second large vibration intensity peak value of different stay cable spectrograms, a bridge management and maintenance unit can conveniently know the abnormal vibration condition of the stay cable in time and maintain the stay cable, the service life of the stay cable is prolonged, and a guarantee is provided for safe operation of a bridge.

The invention relates to the technical field of energy storage risk prediction, and particularly discloses an electrochemical energy storage risk prediction method, which comprises the following steps of: determining a risk characteristic value of an electrochemical energy storage system, obtaining an abnormal deviation value of an operation environment of the electrochemical energy storage system, and obtaining a risk judgment threshold value of the electrochemical energy storage system; according to the method, the real-time operation state of the electrochemical energy storage system is monitored, whether the electrochemical energy storage system has risks or not is judged by combining a risk judgment threshold value of the electrochemical energy storage system, and the risk level of the electrochemical energy storage system with the risks is determined. According to the method, the problems that the existing risk management system is not easy to carry out and is lack of comprehensive analysis are solved, rapid response and implementation of effective rectification measures are facilitated, the accident occurrence probability is remarkably reduced, the efficiency and pertinence of maintenance work are improved, a perfect risk judgment threshold system is established, potential risks can be systematically identified and evaluated, and the overall risk management capability is improved.

The invention discloses a transient enhancement circuit applied to a COT mode buck converter in the technical field of integrated circuits, and the transient enhancement circuit comprises an output voltage sampling circuit and a fully differential transconductance amplifier GM. The input end of the output voltage sampling circuit is connected with the output end of the COT mode buck converter; the output voltage sampling circuit is used for sampling an output voltage signal of the COT mode buck converter and sending the sampled voltage signal to the input end of the fully differential transconductance amplifier GM. According to the invention, the transient enhancement circuit applied to the COT mode buck converter is introduced, so that the effective improvement on the up-down rush and the recovery time in the load switching process of the buck converter is realized, and the system is continuous and the system response is optimized by dynamically changing the conduction time.

The invention relates to an automobile part quality early warning method and device, computer equipment and a computer readable storage medium. The method comprises the following steps: according to historical quality defect data of an automobile part, carrying out early warning detection on the automobile part under a preset early warning dimension to obtain an early warning detection result; the preset early warning dimension comprises at least one of the number of defective products, the growth rate of the defective products and the predicted change rate of the defective products; the historical quality defect data comprises the number of defective products of the automobile parts in a plurality of periods; carrying out fusion processing on the early warning detection results under each early warning dimension to obtain a comprehensive early warning detection result of the automobile part; and performing graded quality early warning on the automobile parts according to the comprehensive early warning detection result. By adopting the method, the early warning accuracy can be improved.

The utility model discloses an elastic nylon fabric which comprises a fabric layer, the fabric layer is formed by interweaving warp yarns and weft yarns in a plain weave mode, the warp yarns are of a ZS double wrap yarn structure formed by wrapping spandex with low-denier nylon, the twisting mode is that Z twisting and S twisting are conducted at the same time, and the twisting degree ranges from 1800 twists to 2000 twists. According to the elastic nylon fabric, a ZS double-wrapping structure is adopted in the warp direction of the elastic nylon fabric, the overall tension of wrapping yarn is ensured, and the elasticity and stability of the fabric are improved. Meanwhile, by adjusting the density in the warp direction and the weft direction, the fabric not only has an excellent cool feeling effect, but also has good anti-ultraviolet performance, and the air permeability is optimized.

The invention relates to the technical field of high-performance composite materials, and provides a frequency band magnetic control adjustable one-dimensional nanotube composite wave-absorbing material and a preparation method thereof.The material is composed of a one-dimensional tubular ferroferric oxide matrix and manganous-manganic oxide wrapping the outer side of the matrix, and directional arrangement is conducted through magnetic control rotation. The preparation method comprises the following steps: preparing an iron oxyhydroxide precursor through a hydrothermal synthesis method; the preparation method comprises the following steps: reducing an iron oxyhydroxide precursor by a liquid-phase pyrolysis method, and coating a manganous-manganic oxide shell layer in situ at the same time, so as to obtain a nanotube ferroferric oxide / manganous-manganic oxide composite material; and carrying out orientation arrangement on the nanotube-shaped ferroferric oxide / manganous-manganic oxide composite material through magnetic field control. According to the preparation method and the structural design, the yield, the uniformity, the magnetic performance, the electromagnetic wave absorption efficiency, the multi-band electromagnetic loss enhancement and the like of the material are remarkably improved.

The utility model discloses a moisture-absorbing, quick-drying, cool and breathable four-way stretch fabric, which is a tatting twill fabric with a two-up and one-down Z twill weave, and comprises a fabric body, the front side of the fabric body is in a twill style, the back side of the fabric body is in a point-like pattern style, and the fabric body is formed by interweaving warp yarns, first weft yarns and second weft yarns, the warp yarn is formed by stranding two twisted yarns wrapped with spandex, the first weft yarn is a twisted special-shaped section polyester filament yarn, and the second weft yarn is formed by stranding two twisted core-spun elastic yarns. According to the moisture-absorbing, quick-drying, cool and breathable four-way stretch fabric, through adjustment and application of the fabric texture and the yarn, the style is novel, processing is convenient, performance is stable, the fabric texture characteristics are fully utilized to be combined with the yarn, and the fabric has the advantages of being moisture-absorbing, quick-drying, cool, dry, comfortable, breathable and the like; the warp yarns and the second weft yarns are processed into the elastic yarns in a wrapping and core-spun mode, so that the fabric is endowed with more excellent extension and recovery performance, and the fabric has four-side elasticity and is more comfortable to wear.

The present invention relates to the field of intelligent interaction technology, and discloses a big data driven digital human intelligent interaction method and system, the method comprising: extracting interactive audio and video frame sets in user historical interactive videos, performing image smoothing and image equalization on each video frame in the video frame set to obtain enhanced video frames; identifying interactive texts corresponding to interactive audios; extracting feature time sequence information of enhanced video frames, interactive texts and interactive audios respectively, performing feature interaction on the feature time sequence information to obtain multimodal features; calculating target interactive texts and corresponding target interactive voices according to multimodal features, generating target interactive expressions according to target interactive texts and target interactive voices; constructing interactive videos of target digital humans according to target interactive texts, target interactive voices and target interactive expressions, and using interactive videos to interact with users. The present invention can improve the accuracy of intelligent interaction of digital humans.

The invention provides an unmanned aerial vehicle routing inspection path planning method based on artificial intelligence, a medium and a server, and the method comprises the steps: obtaining an initial routing inspection path in a power routing inspection region, the initial routing inspection path being a double-side routing inspection path, and a power transmission cable at each side corresponding to a single-side routing inspection path, each single-side inspection path comprises a plurality of I-class inspection path segments for performing power inspection on the power transmission towers and II-class inspection path segments for performing power inspection along power transmission cables between two adjacent power transmission towers, and the I-class inspection path segments and the II-class inspection path segments are connected in sequence; and for a current inspection path segment where the unmanned aerial vehicle is located, obtaining electric power inspection data of the unmanned aerial vehicle in a current time period, and adjusting the current inspection path segment based on the electric power inspection data in the current time period, so that the unmanned aerial vehicle performs electric power inspection based on the adjusted inspection path segment, the power inspection data comprises position data, attitude data and state data of the unmanned aerial vehicle and image data shot by the unmanned aerial vehicle.

This invention relates to a top thread control device and sewing control method for optimizing corner sewing on a double-needle sewing machine. It includes a center thread hook, a take-up lever, two top thread clamps, and a take-up spring mechanism. The center thread hook has two center holes, and the take-up lever has two take-up holes. The take-up spring mechanism includes two guide components and two take-up springs. The guide components include guide grooves and guide hooks, and the take-up springs include hook rods that can rotate up and down around a rotation axis. One guide component, take-up spring, top thread clamp, center hole of the thread hook, and take-up hole constitute one top thread control unit, while the other constitutes another top thread control unit. Each top thread control unit controls the top thread of one needle. The top thread passes sequentially through the top thread clamp, guide groove, guide hook, bottom side of the hook rod, take-up hole, and center hole of the thread clamp before passing through the needle. When the take-up lever moves upward, the top thread causes the hook rod to rotate upward.

This invention belongs to the field of carbon nanomaterials technology, specifically disclosing a method for preparing and applying carbon dots from *Pu Di Lan* (a type of medicinal herb) residue. The specific steps are as follows: dried *Pu Di Lan* residue is pulverized using a cell wall breaker to obtain *Pu Di Lan* residue powder; the powder is then reacted using a hydrothermal method; the reaction solution is collected; the reaction solution is centrifuged, and the supernatant is collected; the supernatant is filtered, and the filtrate is collected; the filtrate is dialyzed, and the retaining liquid is collected; the retaining liquid is freeze-dried to obtain the *Pu Di Lan* residue carbon dots. The obtained *Pu Di Lan* residue carbon dots exhibit blue fluorescence under a 365 nm ultraviolet lamp, and their surface is rich in functional groups such as hydroxyl and carboxyl groups, showing good hydrophilicity. The *Pu Di Lan* residue carbon dots promote β-D-glucosidase activity and can be used in food processing; simultaneously, the fluorescence of the *Pu Di Lan* residue carbon dots is highly sensitive to β-D-glucosidase, and β-D-glucosidase activity can be detected by fitting a linear regression equation with a standard solution.

The utility model discloses a sound control lamp, and relates to the field of lighting equipment. The sound control lamp comprises a shell, a light source and a microphone, the light source and the microphone are arranged in the shell, a microphone cover protruding forwards is arranged on the front side of the shell, and a plurality of pickup holes facing multiple directions are formed in the microphone cover. In the embodiment of the utility model, the microphone cover is arranged on the front side of the shell, so that the microphone cover is always closer to a user, and the sound control instruction from the user is favorably received. In addition, the microphone cover is of a convex structure, so that the microphone cover has a large surface area, more pickup holes facing different directions can be formed, and the capability of receiving sound waves from different directions is further improved. The sound control lamp provided by the embodiment of the invention has better sound receiving capability, can better receive sound control instructions from different directions, is more sensitive in response to sound control operation, and is better in user experience.

The present application provides a pixel structure, an infrared image sensor and an electronic device. In the pixel structure, a first via hole opposite to the first well region is provided in the first insulating layer, graphene fills the first via hole and forms a heterojunction with the first well region, and the deep well region is connected to the lower end of the first well region and the lower end of the second well region; the first electrode is in electrical contact with the graphene, and the upper end of the second well region forms an ohmic contact with the second electrode; the first well region, the second well region and the deep well region have the same conductivity type, the second well region surrounds the first well region and an isolation groove is provided between the two. The pixel structure of the present application can respond to a very wide infrared spectrum range.

The present invention discloses a polyester core-spun yarn and a production method and application thereof, and belongs to the field of textile technology. The present invention proposes a polyester core-spun yarn, which comprises 65-70% polyester filaments and 30-40% super-bright polyester fibers in terms of mass percentage, wherein the super-bright polyester fibers wrap the polyester filaments. The present invention also proposes a production method for the polyester core-spun yarn, which sequentially comprises a carding process, a drawing process, a roving process, a spinning process and a self-winding process; wherein, in the spinning process, the polyester filaments are drafted, and at the front roller of the drafting zone, the polyester filaments passing through the guide wheel are used as core yarns, and are wrapped in the super-bright polyester fibers for twisting. The polyester core-spun yarn has good joint strength and excellent core wrapping.

The utility model discloses a tension system mechanism which comprises a machine frame, a wire cylinder wound with a wire harness, a tension adjusting device, a tension measuring and controlling device and a guiding device, the tension adjusting device comprises a wire winding wheel, and the wire winding wheel is suitable for winding the wire harness on the wire cylinder so as to pull the wire harness and adjust the tension of the wire harness; the tension measurement and control device comprises a measurement and control instrument and at least one measurement and control wheel, the measurement and control instrument is installed on the rack, the measurement and control wheel is installed on the measurement and control instrument, the measurement and control wheel is connected with the measurement and control instrument, and the measurement and control wheel is suitable for detecting the tension of a wire harness; the guide device comprises a mounting seat, a wire guide rod and a wire guide wheel, the mounting seat is rotationally mounted on the rack, the wire guide rod is mounted on the mounting seat, and the wire guide wheel is mounted at the end part of the wire guide rod; the wire harness guiding device can well guide the wire harness, can adjust the tension of the wire harness in the wire harness guiding process, and is high in efficiency.

The application belongs to the technical field of detection and analysis, and discloses a normal phase detection method for imine reaction control. The method is detected by normal phase liquid chromatography, and the detection conditions include: a polysaccharide derivative normal phase coated type chiral chromatographic column is used, and a mixed solution of n-hexane, ethanol, ethylenediamine and trifluoroacetic acid is used as the mobile phase, wherein the volume ratio of n-hexane, ethanol, ethylenediamine and trifluoroacetic acid is (75-85):(15-25):(0.05-0.15):(0.05-0.15). The method can realize effective separation, detect the content of 1,2,3,4,10,14B-hexahydrodibenzo[C,F]pyrazino[1,2-A]azepine in the reaction solution, and has the advantages of simplicity, accuracy, rapidness and reliability.

The invention belongs to the technical field of bioengineering, and particularly relates to a BmoR protein mutant sensitively responding to phenethyl alcohol and application of the BmoR protein mutant in phenethyl alcohol detection or a biosensor. The BmoR protein mutant is obtained by mutation containing S184T on the basis of a wild type BmoR protein as shown in SEQ ID NO. 1 in a sequence table. The S184T mutant sensitively responds to phenethyl alcohol, so that the problem that wild type BmoR protein does not respond to a phenethyl alcohol high-yield strain is solved; meanwhile, the detection range of S184T on phenethyl alcohol reaches 0-30 mM, the response saturation of BmoR protein on phenethyl alcohol is improved, and the S184T can be used for screening and application of strains with higher yield.

The invention discloses an anti-rollover emergency braking device for a motorcycle and a control method of the anti-rollover emergency braking device. The anti-rollover emergency braking device comprises a gyroscope module, a vehicle speed obtaining module, a controller, a gear motor, an electromagnetic band-type brake device, a motor driving module and an air bag module. The gyroscope module provides three-axis acceleration and angular velocity data; the controller obtains the real-time inclination angle of the motorcycle through attitude calculation according to the three-axis acceleration and rotation angular velocity data, the real-time inclination angle is compared with a preset threshold value in real time, when the inclination angle reaches or exceeds the preset threshold value, braking is triggered, and the controller generates control signals and outputs the control signals to the motor driving module, the electromagnetic band-type brake device and the air bag module; the motor driving module drives the gear motor to operate according to the control signal and cooperates with the electromagnetic band-type brake device to realize emergency braking; and the airbag modules are synchronously started and unfolded. The tilting state of the motorcycle can be detected in real time, when the rollover risk is recognized, the motorcycle is quickly stopped, a safety protection mechanism is released, and therefore impact damage to the human body is reduced.

The utility model provides a kind of nurse station monitoring call alarm, the utility model relates to medical instrument technical field, including substrate and alarm component, substrate is provided with presser along side end edge, substrate is fixed with bottom lining on the same side of presser, bottom lining extends to the end of presser with the elastic clamp plate end of relative interior angle size, so that the plane of presser relative to substrate is in the state of warping;Alarm component is set on bottom lining;The utility model has the beneficial effect that structure is based on press touch switch to realize the monitoring of patient bed state, i.e. When patient leaves bed, the pop-up signal of press touch switch is sent to nursing station terminal, which is convenient for relevant nursing staff to respond in time, and the alarm structure is simple and convenient to lay out, the overall layout and use cost are low, and it can be installed in existing medical system bed end, which improves the practicability and applicability of the alarm.

The invention discloses a high-speed communication method based on an embedded instrument. The high-speed communication method comprises the following steps that S1, the instrument receives protocol data; s2, analyzing the protocol data, and extracting effective instructions in the protocol data; s3, setting an instruction buffer pool, and storing the effective instruction into the instruction buffer pool; s4, sending a protocol data receiving response to the test system; and S5, the instrument analyzes and responds to the effective instruction in the instruction buffer pool when the resource is idle, and then waits for receiving the instruction next time. According to the method, the cache thread is additionally arranged, so that temporary storage of the ASCII instruction after the instrument equipment completes VXI-11 unpacking is realized, and resource scheduling is facilitated to complete analysis and response of the ASCII instruction when the instrument is idle. Through the method, the instrument responds to the message when the resource is idle, and message blocking or instruction response failure caused by a high-priority task is avoided. The problems of instruction failure and error response during rapid receiving of instrument equipment during high-speed VXI-11 communication are effectively solved.

The invention discloses a temperature change rate intelligent control method for a non-condensation climate test box, and belongs to the technical field of climate test boxes, and the method comprises the following steps: S1, obtaining information such as temperature, humidity and pressure in the climate test box through a sensor group; s2, adjusting the temperature, humidity and temperature change rate in the climate test box by using a hardware control system; s3, adopting a temperature and humidity feedback control strategy to realize closed-loop control of temperature and humidity in the climate test box; s4, a fruit fly optimization algorithm is adopted, PID parameter setting in the temperature and humidity feedback control strategy process is carried out in an upper computer through codes, and the system response speed and the control stability are improved. The temperature, the humidity and the temperature change rate in the climate test box are adjusted through the hardware control system, fine regulation and control over the temperature and the humidity are achieved, and therefore the accuracy of the test result is improved, PID parameter setting in the temperature and humidity feedback control strategy process is conducted through the fruit fly optimization algorithm, and the system response speed and the control stability are improved.

The invention relates to the technical field of data processing, and discloses a multi-modal data processing system and method supporting user-defined processing, and the system comprises a collection module which is configured to collect query information; the data processing module is configured to summarize query data types of the query entries, count query times and query interval durations of the query data types, and judge whether to add data types or not based on query results of the query data types and in combination with the query times and the query interval durations; the data storage module is configured to judge whether to adjust the storage mode of the data type or not according to the query times and the query interval duration of each data type; and the data response module is configured to dynamically adjust the response time of the query result according to the query interval duration of the data type and the interval duration influence coefficient. According to the method, the query efficiency can be effectively improved, the resource management is optimized, the user experience is improved, and high expansibility and flexibility are achieved.

The invention provides a method for detecting a compound-SMA and a compound-A in a compound 2-((5-bromo-4-(2-chloro-4-cyclopropylnaphthyl-1-yl)-4H-1, 2, 4-triazole-3-yl)-sulfur) acetic acid, which comprises the following steps: dissolving the compounds in a solvent to obtain a test solution; the compound is-((5-bromo-4-(2-chloro-4-cyclopropyl naphthyl-1-yl)-4H-1, 2, 4-triazole-3-yl)-sulfur) acetic acid, and the structural formula of the compound is shown in the description. Dissolving the compound-SMA and the compound-A with a solvent to obtain a reference solution; and respectively carrying out high performance liquid chromatography-mass spectrometry detection on the test solution and the reference solution to obtain a test chromatogram and a reference chromatogram. The method provided by the invention is good in specificity and good in durability. The method provided by the invention can be used for accurately detecting each genotoxic impurity in the raw material medicine or the preparation, the separation degree of each peak, the number of theoretical plates and the symmetry factor are good, and the response is high.

The invention relates to a method for detecting the dissolution rate of a rimantadine hydrochloride preparation, which specifically comprises the following steps: the rimantadine hydrochloride preparation and a reference substance are respectively dissolved in a dissolution medium, and the dissolution medium is selected from any one of a hydrochloric acid solution, an acetate buffer solution and a phosphate buffer solution. A test sample and a reference substance solution are injected into a gas chromatograph, and the dissolution rate of the rimantadine hydrochloride preparation is obtained through an internal standard method and peak area calculation. According to the method, pretreatment only needs 30 min, rapid detection in the production process can be met, and the timeliness of detection data is ensured; meanwhile, the cost is low, interference of in-vivo physiological factors and influence of small temperature differences of instruments are avoided, and the characteristics of the preparation can be more sensitively reflected.

The invention discloses a settlement package design method considering virtual power plant aggregation user spot instruction contribution degree. The method comprises the following steps: 1) carrying out preliminary distribution on virtual power plant operation benefits; 2) according to the power generation proportion of the power plant, calculating the electricity quantity related income of the aggregation users to each aggregation user; 3) according to the reserved regulation capacity proportion, settlement is carried out on the gather user reserved regulation capacity related income to each gather user participating in spot instruction execution; 4) considering the power fluctuation of the distributed new energy main body of the power plant, and readjusting the income of the aggregated users; and 5) calculating the total revenue of the virtual power plant operator and each main body in the virtual power plant, and completing the settlement of the operation revenue of the virtual power plant. Under the condition of considering the contribution degree of each main body to the spot instruction of the virtual power plant, reasonable settlement of the operation income of the virtual power plant is realized, and a virtual power plant aggregation user can be stimulated to better respond to the spot instruction.

The utility model discloses an intelligent hub bearing unit with an automatic parking function, which comprises a wheel shaft, a connecting block is arranged on one side of the wheel shaft, a micro motor is connected to one side of the connecting block, a microprocessor is arranged in the center of the connecting block, a sensor is arranged on one side of the microprocessor, and the sensor is connected with the micro motor. A micro camera is arranged on the side, away from the sensor, of the microprocessor, an inner ring flange is arranged on the outer wall of the wheel shaft, a magnetic ring is arranged on the outer side of the inner ring flange, steel balls are arranged on the two sides of the magnetic ring, and outer ring flanges are arranged on the outer sides of the steel balls; position data of each hub unit are collected by installing a sensor and a micro camera, so that a vehicle can better understand and respond to the surrounding environment, the rotating speed and direction of each wheel are controlled by installing an independent motor on each hub unit, and data from an ultrasonic sensor and the micro camera are collected through a microprocessor. And the operation accuracy is improved.

The invention discloses a hydraulic drum type clutch which comprises a brake main shaft, a power receiving end is arranged at one end of the brake main shaft, and a hydraulic oil way is arranged in the brake main shaft; the first piston drum is arranged on the periphery of the brake main shaft and is in sliding connection with the brake main shaft; the first piston drum is driven by pressure liquid in the hydraulic oil way to move in the direction away from the braking main shaft. When the supply of the pressure liquid for driving the first piston drum to move in the direction far away from the brake main shaft by the hydraulic oil circuit is cancelled, the first reset piece is used for driving the first piston drum to move in the direction close to the brake main shaft; the first driven piece comprises a first annular wall annularly arranged on the periphery of the first piston drum and a first transmission plate connected with one end of the first annular wall; when the hydraulic oil way drives the first piston drum to move to a preset position in the direction away from the braking main shaft, the first piston drum abuts against the first annular wall, and the braking main shaft, the first piston drum and the first driven piece are connected into a whole.

The invention discloses a plant polyphenol extraction detection method based on synchronization of liquid chromatography and tandem mass spectrometry, and relates to the technical field of analytical chemistry detection, and the method comprises the following steps: predicting a chromatographic elution window through an ultraviolet spectrum, calculating a dynamic synchronization index by fusing mass spectrum background noise data, and starting a synchronous extraction detection program according to the dynamic synchronization index. In the extraction process, the mass spectrum scanning frequency and the ion trap filling time are fed back and adjusted according to pressure and temperature data monitored in real time; and when a target chromatographic peak appears, triggering mass spectrum monitoring channel switching and recording fragment ion information. And finally, integrating the fragment ion abundance ratio and a chromatographic peak shape parameter to carry out result verification. According to the method, dynamic coordination of extraction, separation and detection links is realized, and the signal-to-noise ratio, the sensitivity and the method adaptability of polyphenol compound detection in a complex sample are improved.