136 results about "Electric response" patented technology

The invention belongs to the technical field of geophysical exploration in an extremely complex tunnel environment, and provides an air-ground and hole-tunnel multi-angle combined tunnel unfavorable geology advanced detection system and method.A first main control unit is used for establishing a unified time reference and controlling an air-ground capacitive induced polarization detection unit to collect air-ground electric field data under the unified time reference; the second main control unit is used for controlling the hole-tunnel induced electric field and natural electric field combined detection unit to collect underground induced polarization response signals and continuous natural electric field signals and controlling the tunnel seismic electric field detection unit to collect seismic electric field signals and seismic wave signals; and the second main control unit is used for receiving the air-ground electric field data sent by the first main control unit, uniformly integrating the air-ground electric field data with an underground induced polarization response signal, a continuous natural electric field signal, a seismic electric field signal and a seismic wave signal which are acquired by the second main control unit to obtain a multi-field data set, and performing interpretation and inversion to obtain a potential unfavorable geologic body identification result. And the disaster source detection precision and efficiency in the extremely complex tunnel environment are obviously improved.

Methods and systems for spinal cord stimulation (SCS) are disclosed. The methods and systems involve the use of electrode leads implanted within the spine of a patient to record nerve responses induced by a stimulus. The disclosed neural responses differ in various aspects from the electrical responses previously measured in the SCS context, such as stimulation artifacts and evoked compound action potentials (ECAPs). The disclosed neural responses typically occur at a later time after inducing the stimulation pulse. Another significant feature is that when the frequency of evoked stimulation is ultra-low, such as about 10 Hz or less, the disclosed neural response is most significantly observed at a consistent, relatively constant amplitude as a whole. The disclosed methods and systems may use these neural responses as indications of pain, treatment, and / or another clinically relevant dimension to guide / confirm stimulation placement, as well as feedback control for stimulation parameters.

The invention relates to the technical field of medical monitoring, in particular to a wrist signal collecting and processing method and system based on biological tissue analysis. The system is used for generating wrist multi-signal acquisition optimization equipment by designing and integrating wrist wearable equipment corresponding to a photoelectric volume pulse wave sensor, an electrocardio sensor and a skin electric response sensor and performing position structure optimization design; the method comprises the following steps: acquiring PPG signals, ECG signals and GSR signals corresponding to wrist biological tissues in real time by using wrist multi-signal acquisition optimization equipment, and performing high-frequency drift preprocessing and biological tissue characteristic analysis to obtain a wrist biological tissue signal characteristic set; and performing feature redundancy and dimension reduction processing on the wrist biological tissue signal feature set, and performing wrist physiological state assessment analysis to obtain a wrist biological tissue state assessment result. According to the invention, accurate acquisition and analysis of wrist signals can be realized, so that reliable data support is provided for personalized analysis.

A system of fibers, filaments, and / or other electrically conductive materials forms an electrically conductive-to-semi-conductive yarn that can be assembled into a textile for measurement of voltage, current, resistance, capacitance, inductance, RF, and / or EM signals. Textiles are formed through weaving, knitting, lacing, and / or non-woven mechanical methods of yarn-making into 2D / 3D structures. Textile-based electrodes can be formed via folding, cutting, layering, sewing, and / or embroidering patterns to control signal transmission within / through the electrode. Multiple electrodes are positioned on a surface (e.g., a body) to sequentially or simultaneously perform multiple diagnostic modalities (e.g., electrocardiography, electromyography, electrooculography, electroencephalogram, bioelectrical impedance analysis, skin impedance analysis, and / or electrodermal activity). These modalities are multiplexed using an optimized electrode set through amplitude and frequency deconvolution and filtering algorithms to minimize the quantity of electrodes and connections on the surface while maximizing signal-to-noise ratio, differential and common mode noise rejection, and elimination of external signals (e.g., RF and EM noise).

The invention relates to the technical field of fuel cell control, and discloses a control method of a hydrogen fuel system controller, which comprises the following steps: in response to a system shutdown instruction, controlling a DC / DC converter to maintain operation and request a preset scavenging current, and consuming residual reaction gas in a flow channel and a pipeline by using an electrochemical power generation reaction in an electric pile; meanwhile, hydrogen-cut air-down operation is executed, and the average single voltage of the electric pile is collected in real time; when it is monitored that the average monomer voltage is reduced to be below a preset anti-corrosion safety threshold value, the DC / DC converter is controlled to be disconnected, and mechanical purging is started. A time sequence interlocking mechanism of electrochemical energy depletion and mechanical purging is established, a high-potential retention path in the shutdown process is blocked from the physical and chemical source, and the safety of the shutdown is improved. Reverse polarity corrosion caused by a hydrogen-air interface effect is avoided, and the service life of the galvanic pile is prolonged.

The invention relates to the technical field of industrial process control, and discloses a vacuum induction heating process closed-loop control system applying an industrial mechanism model, which comprises the following steps: acquiring the input active power of an induction coil through a power monitoring unit, and measuring the total external radiation heat flux of the outer wall of a vacuum chamber by a heat flow sensing unit; the embedded decision-making module calculates the thermal-electric response ratio and the time derivative thereof in real time, judges the phase change critical state of the material based on the derivative change and generates a regulation and control instruction, through dynamic capture of the thermal-electric energy balance relation, recognition of the phase change critical point of the material is achieved, and by combining working condition pre-judgment of the vibration spectrum entropy and current ripple characteristic arbitration, the phase change critical state of the material is judged. An anti-interference multi-verification mechanism is constructed, and the robustness of the control system under the preset working condition is improved.

The invention relates to the technical field of equipment management, in particular to an industrial equipment on-line state and configuration state management system which comprises an emotion perception regulation and control module for collecting heart rate data and skin electricity data of a working area, analyzing physiological index fluctuation through heart rate variability measurement in combination with skin electricity response, recognizing a working pressure state and obtaining emotion characteristics. According to the invention, by comprehensively collecting and analyzing the physiological and environmental data of the working area, the dynamic adjustment ability of the production environment emotion is improved. By monitoring the heart rate variability and the electrodermal response, the pressure state of the employee is effectively recognized, and emotion data is further supplemented through sound analysis. The data comprehensive analysis not only optimizes the operation parameters of the equipment, such as adjusting speed and temperature, but also realizes the humanization of the production environment, reduces the pressure of employees, and improves the production efficiency.

The invention discloses a preparation method and application of a photoelectric collaborative flexible optical fiber, and belongs to the technical field of multifunctional flexible optical fiber preparation. Conductive fibers are prepared through a wet spinning / melt co-extrusion spinning process, the conductive fibers are placed in a hollow part of a hollow cladding preform of an optical fiber, and the photoelectric synergistic flexible optical fiber sensor is obtained through synchronous hot wire drawing. According to the invention, the flexible electrode is combined with the transparent high polymer material with good light guide performance to form the photoelectric cooperative sensing flexible optical fiber sensor with both light response and electric response, and the unique optical fiber structure not only achieves the photoelectric cooperative sensing function, but also plays a role in packaging the flexible electrode, so that the durability of the optical fiber sensor is higher. The fiber has excellent performances of flexibility, fatigue resistance and the like, can be used as optical fiber sensing equipment for monitoring human joint movement, and has huge application potential in the fields of optical fiber communication, sensing detection, biomedical treatment and the like.

The invention discloses a VR emotion quantitative management method and system based on physical and psychological interaction, and relates to the field of psychotherapy, and the method comprises the steps: collecting the heart rate variability data, the electrodermal response data and the EEG alpha wave power data of a user in a resting state, and obtaining the EEG alpha wave power data of the user based on the heart rate variability data and the electrodermal response data; generating color, density and physical boundary parameters of the initial emotion energy field; and rendering a dynamic emotion energy field in the VR environment according to the initial emotion energy field parameters, and detecting the distance change between the user and the dynamic emotion energy field through a field density growth algorithm. According to the method, heart rate variability, electrodermal response and EEG alpha wave data are fused by adopting an S-shaped curve function to generate emotion energy field parameters, accurate mapping of physiological states and virtual environments is established, emotion recognition sensitivity is improved, treatment efficiency is improved, field density attenuation rate is dynamically controlled innovatively through parasympathetic nerve activation degree, and the treatment effect is improved. And the synergistic effect of behavior intervention and nerve regulation is realized.

The invention belongs to the technical field of intelligent fragrance control, and discloses an intelligent fragrance control system and method based on olfaction perception self-adaption, multi-dimensional data such as exhaled gas fragrance residue and skin electroreaction are captured in real time through a multi-mode olfaction fatigue monitoring unit, and 1-5 olfaction fatigue levels are accurately judged in combination with an LSTM-attention model; and then the dynamic release control unit is matched with a layering strategy, for example, short-time pulse stimulation is started in light fatigue, fragrant cross-modulation switching and concentration zeroing are triggered in heavy fatigue, and local high-concentration pseudo fatigue is avoided synchronously through a distributed space probe. By means of the design, fragrance release is always matched with the real-time olfaction state of a user, the problem that the fragrance cannot be effectively perceived after continuous exposure is thoroughly solved, it is ensured that the user can stably perceive the fragrance in different use periods, and the use experience is remarkably improved; and a complete logic chain with multi-mode monitoring, double-target sensing and cooperative control is constructed.

The utility model relates to the technical field of rare earth resource exploration, in particular to a comprehensive measuring device for hydraulic parameters and various electric responses, which comprises a constant-pressure water supply component, an adjusting valve, a measuring soil column container, a collecting and measuring component, a pressure sensor, a recorder and an electric response measuring instrument. The soil column measuring container comprises a container main body, a microporous baffle plate, two current electrodes and two measuring electrodes, the water inlet end and the water outlet end of the constant-pressure water supply assembly are respectively communicated with the container main body through pipelines, and the storage and collection assembly is arranged on the pipeline between the water outlet and the constant-pressure water supply assembly; a sample cavity between the two microporous baffles in the container main body is used for filling a sample; the adjusting valve is used for adjusting the flow; the pressure sensor, the collecting and measuring assembly, the measuring electrode and the current electrode are used for measuring hydraulic parameters and flowing electric response. According to the utility model, the hydraulic parameters and various electric responses of the sample can be accurately measured, and the electric responses under different hydraulic conditions can be measured.

The present application provides a frequency selective surface unit having large-angle stability. The frequency selective surface unit comprises a dielectric layer, a first metal layer, and a second metal layer. The dielectric layer is provided with an installation portion, and the installation portion is used to achieve cross-connection of two frequency selective surface units. The first metal layer is disposed on a side of the dielectric layer. The second metal layer is disposed on the side of the dielectric layer facing away from the first metal layer, and a capacitive structure or component is provided on the second metal layer. In the present application, an electric response can be generated on the first metal layer, and a magnetic response can be generated on the second metal layer, so that electromagnetic control can be performed on a frequency selective surface device provided with the frequency selective surface units arranged in a cross configuration. In this way, the frequency selective surface device having a three-dimensional structure can achieve high selectivity by having high wave transmittance in a high-frequency first operating frequency band and having high reflection in a low-frequency second operating frequency band. The device also have low loss, and achieves dual-polarization large-angle stability.

The invention provides a frequency selective surface unit with large-angle stability, the frequency selective surface unit comprises a dielectric layer, a first metal layer and a second metal layer, the dielectric layer is provided with a mounting part, and the mounting part is used for enabling two frequency selective surface units to be connected in a cross manner; the first metal layer is arranged on one side of the dielectric layer; the second metal layer is arranged on the side, away from the first metal layer, of the dielectric layer, and a capacitive structure or device is arranged on the second metal layer. According to the frequency selective surface device, the first metal layer can generate the electric response, and the second metal layer can generate the magnetic response, so that electromagnetic regulation and control can be performed on the frequency selective surface device with the crossed frequency selective surface units; the frequency selective surface device with the three-dimensional structure can have high selectivity of high wave transmission in the first working frequency band with relatively high frequency and high reflection in the second working frequency band with relatively low frequency, loss is low, and dual-polarization wide-angle stability is achieved at the same time.

The invention provides a railway driver fatigue driving monitoring method and device and electronic equipment, and relates to the field of data processing. Physiological data, behavior characteristic data and driving operation data of the railway driver in the driving process are obtained, the physiological data comprise heart rate variability, brain wave characteristics and electrodermal response, and the behavior characteristic data comprise blinking frequency, eye closing time, fixation point change and yawning times; the driving operation data comprises a speed regulation handle rotation angle, acceleration change and braking frequency; inputting the physiological data, the behavior characteristic data and the driving operation data into an LSTM model to obtain a physiological fatigue score, a behavior characteristic fatigue score and a driving operation fatigue score; determining a comprehensive fatigue index based on the physiological fatigue score, the behavior characteristic fatigue score and the driving operation fatigue score; and judging whether the railway driver is in fatigue driving or not in the driving process according to the comprehensive fatigue index. By implementing the technical scheme, the monitoring accuracy is improved.

The invention relates to the technical field of intelligent driving, and provides an intelligent driving method and system based on driver biofeedback. The method comprises the following steps: firstly, acquiring multi-mode biological signals such as heart rate, electrodermal response and eye movement track of a driver and a vehicle movement signal in real time through an in-vehicle sensor; carrying out cross-modal feature fusion and analysis on the signals by utilizing a driver state analysis model, carrying out parallel calculation on tensity, motion sickness and attention level indexes of the driver, and generating a quantized comfort level score; furthermore, in a trajectory planning stage, a comfort level score corresponding to each candidate trajectory is predicted through a personalized comfort level prediction model, the comfort level score is used as an optimization target parallel to safety and efficiency for comprehensive decision making, and finally an optimal trajectory is selected for execution. According to the invention, the automatic driving system can sense and respond to the subjective state of the driver in real time, the tension and motion sickness of passengers can be effectively relieved, and the riding comfort and personalized experience are improved.

The invention provides a battery fire OFF-GAS eliminating device and method based on a plasma discharge principle, and relates to the technical field of battery fire protection. According to the battery fire OFF-GAS eliminating device and method based on the plasma discharge principle, through the arrangement of the suction unit, the plasma discharge reaction unit, the sensing unit, the discharge unit and the automatic control system, after a battery fire occurs, the fire and toxic gas treatment are combined, harmful gas is sucked and treated through plasma, the decomposition rate exceeds 95%, and the safety of the battery fire OFF-GAS eliminating device is improved. Explosive toxic gas is rapidly eliminated, the performance is more than three times that of the prior art, the situation that detonation is caused by explosive mixed gas formed by high temperature and a large amount of smoke generated after the battery is on fire at the initial stage of the fire is effectively solved, and the problem that a large amount of toxic OFF-GAS is generated during the battery fire is efficiently and rapidly solved.

The invention belongs to the technical field of microcapsules, and particularly discloses a current response type essence microcapsule as well as a preparation method and application thereof. The essence microcapsule is prepared by taking a chitosan-polypyrrole composite material as a wall material and essence as a core material and coating the essence through an in-situ polymerization method, and the essence microcapsule is prepared by applying a safe and low-voltage direct current by utilizing the good film-forming property and biocompatibility of chitosan and the rapid electric response characteristic of polypyrrole. And the polypyrrole is subjected to reversible oxidation-reduction reaction to initiate swelling or shrinkage of the wall material, so that accurate and reversible regulation and control of the release rate of the essence are realized. The method is simple in process, environment-friendly, safe and easy for large-scale production, solves the problem that the traditional aromatherapy release is uncontrollable, and has the advantages of quick response, high safety, environment friendliness and the like.

The present invention relates to the technical field of medical monitoring, and particularly to a wrist signal acquisition and processing method and system based on biological tissue analysis. The system is used for: designing a wrist-worn device integrated with a photoplethysmogram sensor, an electrocardiogram sensor, and a galvanic skin response sensor, and optimizing the position and structure design to generate an optimized device for wrist multi-signal acquisition; using the optimized device for wrist multi-signal acquisition to collect PPG signals, ECG signals, and GSR signals corresponding to wrist biological tissues in real time, and performing high-frequency drift preprocessing and biological tissue feature analysis to obtain a wrist biological tissue signal feature set; performing feature redundancy and dimensionality reduction processing on the wrist biological tissue signal feature set, and performing wrist physiological state evaluation and analysis to obtain a wrist biological tissue state evaluation result. The present invention can achieve accurate acquisition and analysis of wrist signals, thereby providing reliable data support for personalized analysis.

The invention provides a nanofluid gradient film, a preparation method thereof and application of the nanofluid gradient film in preparation of a pressure sensor. According to the gradient film, the interlayer spacing, the charge density and the wettability of MXene are adjusted by cooperatively inserting different amounts of one-dimensional carboxylated cellulose nanofibers. A nano channel of the gradient membrane is divided into a weak confinement region, a medium confinement region and a strong confinement region, and a rapid permeation-charge shielding-confinement enhanced efficient ion transmission path is constructed. Compared with a single uniform channel, the triple gradient nano channel shows high and different force-electricity response signals to different metal cations. According to the pressure sensor constructed based on the nanofluid gradient film, the sensing performance is remarkably improved in a NaCl solution, the sensitivity of the pressure sensor is 37.28 nA cm <-2 > kPa <-1 >, the cycle stability reaches 50000 times, the response time is 119 ms, and the pressure sensor exceeds the level of currently reported similar sensors.

The discharge type desulfurization and denitrification and fine particulate matter trapping equipment comprises a reaction tower and a discharge reactor, waste gas enters the discharge reactor and then enters the reaction tower, flows from bottom to top in the reaction tower, passes through the desulfurization and denitrification reaction area and the electrostatic trapping area and then flows out from the upper part of the reaction tower; integrated collaborative purification is achieved, and the three functions are integrated; an advanced pulse power supply and an optimized reactor structure are adopted, so that the generation efficiency and the stability of discharge plasma are improved; the output parameters of the high-voltage pulse power supply, the addition amount of the absorbent and the operation cycle of the ash removal system are automatically adjusted through an intelligent algorithm; it is ensured that the system can keep the optimal operation state under different working conditions, and the adaptability and reliability of the system are improved.

The application discloses a kind of methods and systems for quickly evaluating the test of corona resistance of enameled wire, it is related to motor insulation life evaluation and corona performance test technical field, including simulating the corona stress caused by frequency conversion motor operation to enameled wire, according to frequency band different excitation time and safety protection strategy are automatically matched;Based on different types of sensors, the analysis is carried out to enameled wire electric response signal;Signal multi-domain feature analysis is carried out, and the comprehensive corona tolerance of enameled wire is comprehensively evaluated.The method disclosed in the application constitutes a rigorous logic closed loop in modeling, perception and evaluation level: driven by real excitation model, combined with nonlinear response identification, and then fed back to test control through multi-domain feature score, effectively opening the key link in the whole process of enameled wire insulation corona performance evaluation, so as to build a kind of high authenticity, high robustness, quantifiable fast corona test method.

A classification device for classifying an electric input signal may include: an input node to receive the electric input signal; a reference circuit configured to generate an electric reference signal; a memristive structure configured to cause an electric response signal as a function of both the electric input signal received at the input node and the electric reference signal generated by the reference circuit; an electric analysis circuit coupled to the memristive structure to determine one or more characteristics of the electric response signal caused by the memristive structure; and one or more processors configured to determine a class associated with the electric input signal based on the one or more characteristics of the electric response signal determined by the electric analysis circuit.

Method for manufacturing a battery, comprising: a first step of manufacturing an electrode body containing an electrode containing an electrodeactive material and a solute of an electrolyte solution; and a second step of penetrating a solvent of the electrolyte solution into the electrode body.

The invention discloses a VR psychological intervention method fusing emotion release and wake-up, and relates to the technical field of VR psychological intervention, comprising the following steps: after a user enters a virtual reality psychological intervention environment, a system synchronously collects physiological signals, voice intonation and facial micro-expression information of the user to obtain multi-modal data; the physiological signals comprise galvanic skin response, heart rate and heart rate variability; based on the multi-modal data, the emotional states of the user are classified, emotional state labels are generated, and the emotional state labels comprise three types of high-negative emotions, low-negative emotions and positive emotions; when the emotional state label indicates that the user is in a high-negative emotional state, an emotional release stage is triggered, the user captures a dark energy ball appearing in a virtual space through gesture interaction and executes a throwing-out action, and the energy ball moves along with a gesture track of the user and explodes and dissipates after the release action of the user is completed.

The present application relates to the technical field of high-voltage discharge plasma, and provides a high-voltage discharge plasma element detection device, which comprises an optical platform, a discharge reaction unit, an electrical diagnosis unit and an optical diagnosis unit; the discharge reaction unit, a fiber displacement stage and an ICCD displacement stage are installed on the optical platform; the discharge reaction unit comprises a sample carrier, a supporting component, a ground electrode and a high-voltage electrode; the sample carrier is arranged on the supporting component, and the center of the sample carrier is provided with a small hole; the ground electrode is installed at the root of the optical platform and is grounded, and the needle tip of the ground electrode faces the center of the sample carrier; the high-voltage electrode is arranged above the small hole of the sample carrier, and a plurality of groups of radiating fins are installed on the high-voltage electrode; the discharge reaction unit is connected in series with a parameter adjustment dark box, and the parameter adjustment dark box is connected with a high-voltage alternating current power supply; and the present application can realize accurate regulation and control of the discharge mode and detection of metal elements in solids.

The application discloses a novel flexible electric response liquid crystal polymer material and a preparation method thereof, and the novel material has the capability of reversible response to an electric field at room temperature. Existing electric response liquid crystal polymer materials often have a high glass transition temperature and need to be in a high-temperature environment to produce response to an electric field. In the application, the novel flexible electric response liquid crystal polymer material is generated by the reaction of a mono-acrylate monomer, a di-acrylate monomer and a chain transfer agent, has a glass transition temperature lower than room temperature, can produce reversible response to an electric field at room temperature, and has wide application prospects. The novel material can be used in many fields such as self-cleaning surfaces and touch displays in the future.

The invention relates to the technical field of membrane separation, and discloses a high-protein milk concentration process based on a membrane filtration technology, the process adopts an electric response membrane grafted with an electric response polymer brush on the surface, and an electric control zymogen modified by genetic engineering is added into milk feed liquid to be treated. The zymogen is modified with an electric field responsive anchoring group and an electric signal activated ferrocene protecting group. In the filtering stage, a first electric field is applied to stretch the polymer brush, so that anti-pollution filtering is realized; and in the cleaning stage, switching to a second electric field to enable the polymer brush to shrink and drive the zymogen to be anchored on the surface of the membrane, and applying an activation pulse to trigger the activity of the zymogen so as to degrade pollutants in situ. On the premise of not interrupting production, not adding chemical cleaning agents and not damaging target product protein, milk concentration is efficiently and continuously carried out, and long-term stable high permeation flux is maintained.

The invention discloses an emotion recognition system based on wearable intelligent equipment, and belongs to the technical field of emotion recognition, and the system comprises the intelligent wearable equipment which obtains related parameter information generated by a wearer; the information transmission module is used for transmitting the generated relevant parameter information to the analysis management terminal; the analysis management terminal comprises a recognition module and a judgment module, the recognition module judges the emotion type of the wearer according to the obtained relevant parameter information, and the judgment module judges whether the emotion of the wearer is normal or not according to the obtained relevant parameter information; and the display module displays the judgment result of the analysis management terminal. Related parameter information generated by the wearer is obtained through the intelligent wearable device, whether the emotion of the wearer is abnormal or not is accurately judged in real time according to the heart rate, the blood pressure, the respiratory rate, the skin temperature, the electrodermal response and other change conditions of the wearer, corresponding processing is carried out, the wearer can be monitored in real time, and the emotion of the wearer can be monitored in real time. And disease rehabilitation is facilitated.

The invention discloses a detection system and method capable of monitoring multiple heavy metal ions online in real time, and relates to the technical field of water quality detection.The method comprises the steps that the temperature of a water sample is measured through a thermoelectric coupler temperature detection method, real-time temperature correction is conducted through a resistance compensation method, and a target water sample with the stable temperature is obtained; the method comprises the following steps: exciting a target water sample with stable temperature by adopting an electrochemical impedance spectroscopy method, and collecting a composite electric response signal by utilizing a capacitance response measurement method; decomposing and denoising the composite electrical response signal by adopting a time-frequency combined wavelet transform method to obtain multiple electrical characteristic data; and learning and reasoning the multiple electrical characteristic data by using a deep convolutional neural network to obtain the types of the heavy metal ions and estimate a concentration quantitative result. According to the method, the detection sensitivity and the resolution capability of weak response ions are improved, so that high-precision recognition and concentration estimation of various heavy metal ions are realized, and the real-time detection requirement in a complex water body environment is effectively supported.

The application discloses an electric response nanofiber composite film and a preparation method and application thereof, and the preparation method comprises the following steps: vacuum drying and grinding a metal organic framework material UiO-66, dissolving the obtained UiO-66 powder in N,N-dimethylformamide, and ultrasonic treatment to make the UiO-66 powder uniformly dispersed; dissolving PVDF powder in the solution, stirring until the PVDF powder is completely dissolved, adding acetone to obtain an electrospinning precursor solution; electrospinning the electrospinning precursor to obtain a PVDF / metal organic framework composite nanofiber film; and then performing drying and annealing treatment to obtain the electric response nanofiber composite film. The composite film has high flexibility, a high specific surface area, excellent piezoelectric response and sound-electric conversion efficiency, and solves the problems of low beta phase content and poor force-electric coupling efficiency of traditional organic piezoelectric materials; the composite film has a wide application prospect in the fields of flexible piezoelectric sensors, sound wave detectors, hydrophones and wearable sound-electric devices.