225 results about "Current strength" patented technology

The invention discloses a distribution network recording fault accurate positioning method based on big data analysis, and relates to the technical field of power distribution network fault positioning, and the method comprises the steps: deploying a fault indicator; setting a trigger threshold value, and triggering high-precision transient recording to generate recording data when the current or the electric field suddenly changes; carrying out time alignment on the recording data and synchronously acquired current intensity, electric field intensity, cable temperature and environment data, extracting transient characteristics and environment characteristics after wavelet transform denoising, and combining the transient characteristics with the environment characteristics to generate a comprehensive characteristic matrix; binding the comprehensive characteristic matrix and the line topology information, and uploading the information to a monitoring center through encryption communication; formulating a dynamic threshold association rule, and judging a fault type; the monitoring center matches the current transient waveform with a historical database and calculates a fault signal propagation time difference; and calculating a fault distance by combining line topology information, and fusing the fault signal propagation time difference and the fault distance to obtain a fault coordinate.

The invention discloses a switch loop data extraction method, device and equipment based on phase locking, and the method comprises the steps: carrying out the interval change analysis of operation data in a ring main unit, and recognizing a communication abnormal node through a phase locking technology; associating a mechanical vibration source based on the communication abnormal nodes, detecting a vibration conduction path, extracting current fluctuation characteristics, and determining position deviation; the operation current intensity is adjusted in combination with fluctuation characteristic parameters, and accurate off-position control is achieved through reverse braking force; constructing a dynamic threshold reference based on frequency domain analysis, and generating a complete operation record according to the dynamic threshold reference and the accurate parking data; performing typed grouping and transmission optimization on the data, and controlling data switching by adopting a gradually migrated beat sequence; and finally, through signal reconstruction and data fusion technologies, a switch loop data set with continuous time sequence and complete space is generated. The method can effectively cope with communication interference, mechanical vibration and other complex environmental factors, and improves the integrity and accuracy of data acquisition.

The invention relates to the technical field of photovoltaic intelligent operation and maintenance, and discloses a distributed photovoltaic intelligent operation and maintenance system. The method comprises the following steps: acquiring operation parameters such as voltage output, current intensity, temperature and ambient light of a plurality of photovoltaic units in real time; classifying the performance state of each photovoltaic unit based on the parameters, and identifying an efficient operation area, a performance attenuation area and a potential fault area; secondly, extracting rules from the maintenance strategy database, and constructing a mapping relation between the performance partition and the maintenance strategy; then determining a key partition according to the partition priority weight and the system impact factor, and optimizing the matching degree of the maintenance strategy combination; then, the real-time operation state of the system is checked according to the optimized combination, the maintenance demand change is recognized, and the mapping relation is updated; and finally, determining a maintenance target and an execution sequence according to the updated mapping relationship, and generating a structured operation and maintenance management library to guide subsequent maintenance activities. The method can improve the operation and maintenance efficiency and accuracy, and guarantees the stable and efficient operation of the photovoltaic system.

The invention relates to a bridge tower component reinforcing steel bar intelligent hoisting control method, which belongs to the technical field of bridge construction, and comprises component reinforcing steel bar butt joint, and specifically comprises the following steps: S601, conical permanent magnet array modules are circumferentially embedded in the end surfaces of component reinforcing steel bars, and annular electromagnet array modules are correspondingly arranged on the end surfaces of embedded reinforcing steel bars; on the basis of the fusion parameter set in the step S2, obtaining the distance value between the embedded steel bar and the component steel bar, and then triggering an electromagnet to be powered on; s602, closed-loop feedback adjustment is conducted, the pose deviation and contact pressure of the component reinforcing steel bars and the embedded reinforcing steel bars are monitored in real time through a multi-mode sensing unit, and data are transmitted back to the edge computing nodes; and S603, electromagnetic parameter dynamic optimization is conducted, the current intensity of the annular electromagnet array is dynamically adjusted according to the pose deviation and the spacing value, and the magnetic attraction force is enhanced. Efficient and accurate butt joint of the component reinforcing steel bars and the embedded reinforcing steel bars is achieved through magnetic butt joint and dynamic current adjustment.

The invention relates to an intelligent identification and conversion control method for a charging interface of a multi-standard charging pile in the field of new energy automobiles, and the method comprises the steps: carrying out the mode matching analysis of interface physical feature data and communication signal feature data, and obtaining a preliminary classification result of the type of a charging interface device; according to the loading result of the communication configuration parameters, obtaining a confirmation feedback signal of successful protocol switching; judging whether the load demand data conforms to a rated output power range of a charging interface device or not; according to the authorization instruction, current intensity data including a peak value and an average level and voltage level data including a fluctuation amplitude in the charging process are monitored in real time; if the current intensity data or the voltage level data exceed a preset safety threshold value, power supply connection is disconnected, and a circuit path is cut off; and generating a power-off record log containing abnormal fluctuation data and a power-off moment according to a result of disconnecting the power supply connection.

The present invention relates to a current sensor with an electrical conductor having at least two meander loops. Each meander loop consists of a first and a second conductor section, which are connected in series and run in parallel. The distances between the conductor sections are different for the two meander loops. Sensor elements with NV centers and / or paramagnetic centers are placed in the slots of the meander loops. The current sensor has means for irradiating these centers with pump radiation, separating the generated fluorescent radiation, and detecting the intensity and time delay of the fluorescent radiation. This enables precise measurement of the current strength by evaluating the fluorescent radiation of the NV centers and / or paramagnetic centers in the meander loops.

The invention provides a two-stage current intensity adjusting method for an eye therapeutic apparatus, and the method comprises the steps: extracting the impedance effect intensity of a current at a macular center through recognizing the thickness of an impedance barrier layer corresponding to the current limiting degree of a high-impedance region, and combining with the actual penetration thickness, and obtaining the current penetration depth reduction proportion of the current penetration depth at the macular center; the current intensity imbalance degree of the coarse adjustment basic current intensity in the transition subarea is evaluated, and by obtaining the current intensity increase and decrease multiple of the fine adjustment compensation current intensity, the gradient difference between high impedance limitation and low impedance permeation is integrated, and the current intensity is compensated to balance the current intensity imbalance degree of the transition subarea; and updating the current output power level of each partition according to the fine adjustment compensation current intensity, and feeding back the current output power level to a therapeutic instrument circuit in real time to obtain uniform therapeutic intensity distribution so as to be matched with the decreasing proportion of impedance of impedance gradient distribution from high to low.

The invention provides an underground engineering leakage three-dimensional detection method, which comprises the following steps of: arranging a three-dimensional electrode system on an outer side and an inner side drill hole of a to-be-detected underground enclosure structure, and detecting and recording potential data and space coordinates of an electrode array; repeatedly collecting and preprocessing the collected potential data to eliminate the influence of current intensity difference and stratum conductivity difference; based on the physical coupling relationship between the electric field intensity and the formation resistivity, filling the data blind area of the inter-hole area; the three-dimensional space model of the electric field intensity is optimized and fitted through an intelligent algorithm, a three-dimensional equal-straight-plane image of the electric field is generated after data reliability is verified, and space coordinates of an electric field abnormal area are marked as suspected leakage points. The problems that in an existing detection method, positioning is not accurate, and the applicability is limited are solved.

The invention discloses a continuous operation gravity energy storage device coupled with magnetic field force and an operation method.The device comprises a top storage platform, a ground platform, an energy storage box, a steel cable, a continuously variable transmission, a controller and an electromagnetic system, the top storage platform is arranged above the ground platform, and the energy storage box is vertically hung below the continuously variable transmission through the steel cable; an energy storage weight can be loaded in the box, the electromagnets and the permanent magnets at the top of the energy storage box keep homopolar repulsion, and the electromagnets and the permanent magnets at the bottom of the energy storage box form heteropolar attraction; the controller accurately controls the magnetic field acting force in the lifting process of the energy storage box by adjusting the current intensity of the electromagnet and the rotating speed of the continuously variable transmission, kinetic energy sudden change in the acceleration / deceleration stage of the energy storage weight is dynamically compensated through the magnetic field force, and two sets are arranged to achieve continuous power generation. Through cooperative control of electromagnetic force and mechanical transmission, the rapid response capability of the system to power grid demand fluctuation is remarkably enhanced, meanwhile, the mechanical loss of equipment is reduced, and the application scene of the gravity energy storage technology is expanded.

The invention provides a closed-loop electro-acupuncture stimulation regulation and control method, system and device based on LSTM and a medium, and the method comprises the steps: obtaining physiological state data of a patient, and extracting time domain features and frequency domain features of the physiological state data; importing the time domain features and the frequency domain features into an LSTM model, and generating a state prediction score and a state prediction trend; and adjusting the pulse width according to the state prediction score, the electrical stimulation frequency and current intensity, and the state prediction trend. The problem that in the prior art, electroacupuncture stimulation parameters cannot be dynamically adjusted in real time according to the physiological state of a patient and can only be set according to fixation and experience, and consequently side effects are obvious is solved.

Disclosed is a method for determining a convective heat transfer coefficient of a water-cooled magnet coil, comprising: when a current having a predetermined current intensity is introduced into a water-cooled magnet coil, acquiring an actually measured average temperature of the water-cooled magnet coil (S10); in finite element analysis software, simulating introducing the current having the predetermined current intensity into a three-dimensional model of the water-cooled magnet coil, and obtaining, by means of emulation, multiple simulated average temperatures of water-cooled magnet coils corresponding to multiple different wall surface roughnesses (S20); fitting the multiple different wall surface roughnesses and the multiple simulated average temperatures respectively corresponding thereto, and obtaining a fitting function (S30); substituting the actually measured average temperature of the water-cooled magnet coil into the fitting function, to obtain a wall surface roughness corresponding to the actually measured average temperature (S40); substituting the wall surface roughness corresponding to the actually measured average temperature of the water-cooled magnet coil into the finite element analysis software, and obtaining, by means of simulation, a convective heat transfer coefficient of the water-cooled magnet coil (S50). Also disclosed is a system for determining a convective heat transfer coefficient of a water-cooled magnet coil.

The present invention relates to a method for monitoring chloride content in porous materials, preferably in reinforced concrete structures, in which a voltammetric sensor comprising a metal electrode is used, characterised in that the electrode metal forms poorly soluble ionic compounds with chlorides and a potentiodynamic excitation signal is applied to the electrode, causing an oxidation-reduction process to take place that favours the formation of the poorly soluble ionic compounds. The formation of the poorly soluble ionic compounds produces a response in the form of electric current intensity that is related to the chloride content in the monitored material.

Power distribution and control board for distributing high current between a power source and one or more subsystems and / or components, and for controlling the distribution of the high current. - a mechanical interface for the mechanical connection of an electrical component, wherein the mechanical interface ensures that the component remains electrically independent of the power distribution and control board after the mechanical connection; - a sensor for measuring the current strength of a current carried by the mechanically connected and electrically independent component, wherein the sensor is mounted directly on the power distribution and control board; wherein the interface is arranged such that it fixes the component in an area relevant to the sensor; and Power distribution and control board arrangement comprising - a power distribution and control board for distributing high current between a power source and one or more subsystems and / or components and for controlling the distribution of the high current; - a component mechanically connected to the power distribution and control board, which is electrically independent of the power distribution and control board; - a sensor for measuring the current strength of a current carried by the mechanically connected and electrically independent component.

Control device (10) for determining switching times of an electromagnetic actuator (1), comprising: - a first process module (11) designed to determine a course of a concatenated magnetic flux as a function of a current intensity for controlling the electromagnetic actuator (1) as an actual characteristic curve (200); - a second process module (12) designed to provide at least one reference characteristic curve (300) for the magnetic flux as a function of the current intensity for controlling the electromagnetic actuator (1), wherein the reference characteristic curve (300) has a first characteristic curve section (301), wherein the first characteristic curve section (301) has a linear profile with a defined gradient and a negative offset (320), wherein the negative offset (320) is selected such that during a switching operation in which the electromagnetic actuator (1) is not moved, the first characteristic curve section (301) of the reference characteristic curve (300) is not exceeded, and wherein the slope of the first characteristic curve section (301) corresponds to a slope of the actual characteristic curve at the beginning of switching off the electromagnetic actuator (1), wherein the reference characteristic curve (300) has a second characteristic curve section (302) whose gradient corresponds to the actual characteristic curve at the beginning of switching on the electromagnetic actuator (1) and which includes a positive offset, and wherein the switching off begins with switching off the power supply of the electromagnetic actuator (1); and - a third process module (13) designed to determine a switching time of the electromagnetic actuator (1) using a comparison of values ​​of the actual characteristic curve (200) with values ​​of the at least one reference characteristic curve (300).

A laser source may include a laser diode, a modulation device, and a feedback device. The modulation device may include an electric power source and may be suitable for modifying a current intensity applied to the laser diode, which may modify an emission frequency of the laser diode. The feedback device may be suitable for modifying a current intensity applied to the laser diode by the electric power source as a function of the electromagnetic radiation emitted by the laser diode.

Method for protecting a branch of an electrical circuit in a motor vehicle. Method for protecting a circuit branch located between an electric battery and equipment, comprising a step (E2) of comparing the measured temperature at a given point on the branch to a maximum temperature threshold, and then, when the measured temperature is above the threshold, a command to open the branch and / or a command to deactivate the equipment; and a step (E3) of measuring the intensity of an electric current flowing through the branch of the electrical circuit, then calculating an estimated temperature at the given point, and comparing the estimated temperature to the maximum temperature threshold, and then, when the estimated temperature is above the maximum temperature threshold, a command to open the branch and / or a command to deactivate the equipment. Figure for the abstract: 2

The present application relates to the technical field of power engineering grounding corrosion prevention, and particularly relates to a method and device for comprehensively evaluating power grounding corrosion. The method for comprehensively evaluating power grounding corrosion comprises the following steps: scoring each parameter in a first macroscopic parameter group and a second macroscopic parameter group of a soil sample to obtain corresponding scores; summing the scores corresponding to each parameter to obtain a score result; determining a corrosion rate of the soil sample through a preset correlation between the corrosion rate and the score result; determining first, second and third corrosion rate increase values of a grounding body through the relationship between the grounding potential difference, the ground current intensity, the ground direct current intensity and the first, second and third corrosion rate increase values, and summing the corrosion rate of the soil sample to obtain a final evaluation result of the grounding body corrosion condition; the present application can combine the corrosion properties of the soil itself with the grounding characteristics in the power transmission and transformation field, so that the evaluation result is more accurate and closer to the real working condition.

The invention discloses a self-adaptive micro-current beauty method and beauty instrument based on electrophysiological index feedback, and relates to the technical field of photoelectric beauty, the method comprises the following steps: obtaining a surface electromyogram signal of a user face, extracting characteristic data of the surface electromyogram signal, and determining current intensity and current frequency of an NMES based on the characteristic data; acquiring a first feedback electric signal and a second feedback electric signal to determine the impedance value of the skin cuticle and the impedance value of the active skin layer, and determining the current intensity of the micro-current and the working time proportion of the NMES and the micro-current according to the impedance values of the skin cuticle and the active skin layer; therefore, a user face electrical stimulation signal is determined. According to the method and the device, parameters of the NMES and the micro-current can be adaptively adjusted, so that different somatosensory and beautifying effects are generated according to different skin states, and a good beautifying effect can be achieved while the somatosensory of a user is ensured.

The invention relates to a control device and a method for determining switching times of an electromagnetic actuator, a device for carrying out the method, and a computer program. To determine a switching time, an actual characteristic curve with a course of a chained electromagnetic flux over the current strength for controlling the actuator is determined. This actual characteristic curve is compared with a reference characteristic curve in order to derive a switching time. By determining switching times in this way, switching times for very short switching durations can also be determined, during which the actuator is switched off before the actuator is fully deflected. The determined switching times can be used, for example, to detect and compensate for fluctuations in the switching behavior of the actuator due to external influences.

The invention discloses an intelligent fire-fighting management system based on region division and a model and an early warning method thereof, and belongs to the technical field of intelligent fire fighting, and the method specifically comprises the steps that a system initialization unit is responsible for recording all equipment information in a monitoring region, subdividing the monitoring region into sub-regions based on equipment distribution, and associating the sub-regions with equipment; the region defining unit identifies the related sub-regions as to-be-confirmed regions when a fire occurs, and marks to-be-confirmed devices; the data acquisition unit collects real-time monitoring data of the equipment, and preliminarily analyzes and judges whether a fire is an electrical fault or not; and if yes, further collecting historical power consumption data. The accident analysis unit normalizes the historical data, constructs a time sequence model, and analyzes the current intensity change; if the real-time current value cluster deviates, a fire disaster caused by abnormal behaviors of the equipment is deduced; otherwise, the aging is caused by the electrical insulating material; according to the invention, the electrical fault is identified through the power consumption data.

In a method for detecting the presence of water or additional water, which exists because of a leak, the following steps are carried out: attaching at least one pair of electrodes to / in an object, to / in the presence of water is to be determined; applying an electrical voltage between the electrodes; testing whether electrical current or electrical current that is increased relative to a basic current flows between the electrodes; and detecting the presence of water in the case of flowing current. When implementing the method, at least two electrodes are used, wherein one electrode can be a ground. The electrodes are arranged separated from one another. DC or AC voltage is applied to the electrodes by a device. The device detects a measured value corresponding to the intensity of the current flowing between the electrodes.

The present invention relates to a method for monitoring chloride content in porous materials, preferably in reinforced concrete structures, in which a voltammetric sensor comprising a metal electrode is used, characterised in that the electrode metal forms poorly soluble ionic compounds with chlorides and a potentiodynamic excitation signal is applied to the electrode, causing an oxidation-reduction process to take place that favours the formation of the poorly soluble ionic compounds. The formation of the poorly soluble ionic compounds produces a response in the form of electric current intensity that is related to the chloride content in the monitored material.

The invention relates to a method for evaluating a switching event in an electromechanical switching device connected to a load current path, comprising the following steps: acquiring a temperature-current intensity value pair (Tm, Im), the temperature-amperage value pair has a temperature measurement value (Tm) of the temperature measured at a temperature measurement point (X) of the switching device (10) and a amperage measurement value (Im) of the current (I) flowing through the load current path measured concurrently with the temperature measurement value (Tm); -recording said pairs of temperature-amperage values acquired at different points in time; comparing at least one temperature-amperage value pair at a point in time before the switching event with at least one temperature-amperage value pair at at least one point in time after the switching event; and evaluating the switching event based on the comparison.

The present application relates to the field of device fault diagnosis, and provides a device fault diagnosis method, system and equipment based on phase current and zero sequence voltage, comprising calculating phase current steady-state value and phase current fault transient value, and constructing single-phase open circuit fault flag; when the single-phase open circuit fault flag indicates that there is single-phase open circuit fault, obtaining fault phase flag quantity through phase current intensity coefficient; constructing first inverter fault flag through zero sequence voltage, when the first inverter fault flag indicates that there is fault, constructing second inverter fault flag through phase current unit value, obtaining inverter fault flag through the first inverter fault flag and the second inverter fault flag, determining device positioning threshold, constructing inverter fault positioning flag based on the device positioning threshold, positive current intensity and negative current intensity; obtaining final fault positioning flag, thereby diagnosing device fault of the device.

This application provides a method, apparatus, device, and storage medium for controlling stray current in pipelines, relating to the field of stray current protection technology. The method includes: acquiring real-time stray current distribution information for each pipeline section along the pipeline. The distribution information includes the stray current intensity flowing through each pipeline section. The distribution information is input into a preset first model, and the target grounding electrode is output from the candidate grounding electrodes corresponding to each pipeline section. The first model is constructed based on historical detection information and the equivalent circuit principle of stray current diversion and grounding, used to determine the target grounding electrode. The historical detection information includes historical stray current distribution information and corresponding historical target grounding electrodes. The target grounding electrode is then activated, used to guide the stray current into the soil.

The invention relates to a system (2) for ascertaining prediction data. The system (2) has a floating unit (4) and a remote base unit (6). The floating unit (4) has a coupling unit (8), a floating hose (10) and a detection system (12). A first end (14) of the floating hose (10) is connected to the coupling unit (8). The detection system (12) is designed to detect, as actual arrangement, a present geometric arrangement of the floating hose (10) relative to the monitoring unit. In addition, the detection system (12) is configured to detect and / or ascertain, as actual location, a present geographical location of the floating unit (4). The detection system (12) is additionally designed to ascertain actual location data which represent the actual location and the actual arrangement. The floating unit (4) is designed to transmit the actual location data via a signal link (18) to the base unit (6). The base unit (6) is designed to receive, as actual weather data, present weather data which represent the present wind strength, the present wind direction, a prediction of the wind strength and / or a prediction of the wind direction in each case of the wind at the actual location. The base unit (6) is additionally designed to receive, as actual sea data, present sea data which represent the present current strength, the present current direction, a prediction of the current strength and / or a prediction of the current direction in each case of the water at the actual location.

The invention relates to a method for forming a battery cell, in particular for forming a solid-electrolyte interface (SEI), in which a time-dependent current intensity (1', 2', 3') and / or voltage is used to form the battery cell, wherein the method is characterized in that a complex-valued cell internal resistance (1, 2, 3) of the battery cell is detected multiple times during the formation, and the current intensity (1', 2', 3') and / or the voltage is controlled according to the detected cell internal resistance (1, 2, 3). The invention also relates to a device for controlling a formation of a battery cell.

The invention relates to the technical field of medical instruments, and discloses a grip strength rehabilitation training device and an operation method thereof in order to solve the problems that in an existing grip strength rehabilitation technology, no adaptive passive training scheme exists for a 0-level grip strength patient, and the resistance adjusting precision is low, the grip strength rehabilitation training device comprises a glove body, and five sets of finger training units are connected to the glove body; the finger training unit comprises a magnetic driving mechanism which is movably connected with the glove body and is electrically connected with a battery panel on the glove body; the finger adjusting mechanism is movably connected with the magnetic driving mechanism and arranged on the periphery of the finger in a sleeving mode. A magnetic coil is fixed on the inner side of a concave connecting frame of a magnetic driving rod, a magnetic sheet is arranged at the end, opposite to the magnetic coil, of a magnetic conduction transmission rod, the magnetic coil and the magnetic conduction transmission rod generate attraction force / repulsive force through current direction switching, the current intensity is adjusted through a battery panel to control the driving force, and complications such as hand swelling and joint stiffness in the early stage of grip rehabilitation are effectively prevented.

The embodiments of the present application provide an aluminum electrolysis energy balance control method, system, storage medium and electronic device, the method comprising: obtaining a first temperature difference between the current ambient temperature and the set ambient temperature of the target electrolytic aluminum series, and a second temperature difference between the current large busbar temperature and the set large busbar temperature; when the first temperature difference exceeds a first preset range and the second temperature difference exceeds a second preset range, determining a current intensity adjustment parameter and a fan opening adjustment parameter according to the first temperature difference and the second temperature difference; and adjusting the current intensity and fan opening of the target electrolytic aluminum series according to the current intensity adjustment parameter and the fan opening adjustment parameter. The technical solution provided by the embodiments of the present application can achieve efficient energy balance control of the electrolytic aluminum series, stabilize the thermal balance of the aluminum electrolytic cell, reduce the energy consumption of the electrolytic aluminum, and thereby promote more stable operation of the electrolytic cell.

The invention mainly relates to the technical field of metallurgy. In order to improve the precision and stability of a liquid alloy casting instantaneous flow monitoring result, the invention provides a liquid alloy casting flow monitoring method and system in the metallurgical casting process, and the core idea of the method is that a crucible and a casting mold are connected through a wire, so that a serial current loop is formed among liquid alloy in the casting process, the connected crucible and the casting mold; a constant-voltage power supply and an ampere meter are connected into the current loop; the ampere meter measures the real-time current intensity I of the current loop under the action of the constant-voltage power supply in real time; the instantaneous flow Q of the alloy is calculated based on the real-time current intensity of the current loop, the resistivity of the alloy, the length L of the alloy liquid flow between the pouring gate and the casting mold and the vertical distance h between the pouring gate and the casting mold, and the calculation result is higher in accuracy and stability.