297 results about "Ammeter" patented technology

The invention discloses an ammeter fault prediction method based on multi-modal fusion, and the method comprises the steps: collecting and preprocessing the multi-modal operation data of an ammeter and associated equipment, and constructing a unified input data set; inputting into a variational auto-encoder for fusion feature extraction, generating a latent variable vector and reconstructing original data; constructing an improved conditional probability graph model, and modeling and reasoning an abnormal label based on a latent variable and a topological structure; jointly training a variational auto-encoder and a graph model, and optimizing the discrimination capability of a latent variable on a structured tag; and inputting real-time data, generating latent variable characteristics, reasoning an abnormal label and confidence of the electric meter, and outputting early warning. According to the method, the variational auto-encoder and the improved conditional probability graph model are fused, so that high-precision prediction and real-time early warning of faults of the electric meter and associated equipment thereof are realized.

The invention discloses an electric meter load real-time monitoring method based on edge calculation. The method comprises the following steps: acquiring load data in real time at an electric meter end and constructing an initial hidden layer network structure; determining an initial reference threshold value of the load data change event; detecting load data change in real time by using an event triggering mechanism and generating a triggering signal; dynamically adjusting a hidden layer node structure based on real-time load data; updating the output weight matrix by adopting a sequential learning method and predicting load data in real time; identifying a key data event according to a prediction result and executing compression packaging; and uploading the packaged key data to a remote monitoring center. According to the invention, local real-time processing of load data is realized, data transmission delay is effectively reduced, and monitoring precision and real-time performance are improved.

The invention discloses a line loss analysis method and system based on transformer area topology identification and terminal equipment. The line loss analysis method comprises the steps of obtaining first power data and load data of a plurality of ammeters and second power data of a plurality of transformers in a transformer area; determining a target transformer to which each electricity meter belongs based on the first power data and the second power data, if each electricity meter belongs to the same target transformer, determining a phase group to which each electricity meter belongs based on the first current data and the second voltage data, and determining a branch box group to which each electricity meter belongs based on the first voltage data between the electricity meters, determining an initial topology result based on the target transformer, the phase group and the branch box group; and checking the initial topology result based on the load data to determine a target topology result, and performing line loss analysis based on the target topology result to obtain a transformer area line loss result. According to the invention, the accuracy of topology identification and line loss analysis can be improved.

The invention discloses a temperature drift compensation method for an intelligent electric meter, and the method carries out the gradual optimization according to levels: constructing a basic temperature drift compensation model at the first layer, and preliminarily offsetting the influence of temperature on the measurement precision; in the second layer, a temperature change rate item is introduced into a compensation formula, the temperature change rate is calculated through a weighted sliding window algorithm, and an instantaneous metering error caused by local instantaneous temperature rise caused by sudden load change is compensated; in the third layer, temperature sensors are independently arranged in a high-heat area (a metering chip) and a low-temperature area (a current transformer) in the ammeter respectively, and a corresponding temperature drift compensation model is established based on temperature data of each area to adapt to the temperature difference of the areas; and the fourth layer respectively constructs deep learning networks for the high-heat area and the low-temperature area, inputs the temperature time sequence data of each area, the operation duration of the electricity meter and the environment temperature into the corresponding networks, and outputs model updating parameters to realize the dynamic updating of the model. According to the invention, the metering precision of the intelligent electric meter in steady and dynamic working conditions and long-term operation can be obviously improved.

The invention discloses a behavior baseline-based ammeter state monitoring method, system, equipment and medium, and relates to the technical field of equipment behavior anomaly detection, and the method comprises the steps: collecting operation parameter time sequence data of an intelligent ammeter in a preset monitoring region during operation, carrying out the combined processing of the operation parameter time sequence data, extracting the multi-dimensional features of the region, and carrying out the detection of the behavior baseline; based on regional multi-dimensional features in a historical normal state, a regional behavior baseline is established through unsupervised learning, regional multi-dimensional features at a current monitoring moment are acquired, a regional consistency index is generated through matching degree calculation with the regional behavior baseline, and an abnormal ammeter is identified according to an individual deviation degree. And based on the region consistency index and a preset period, triggering update maintenance of the region behavior baseline. According to the method, visual visualization and a model self-evolution mechanism are combined, and the state of the industrial electric meter is changed from passive warning to active, accurate and large-scale predictive intelligent operation and maintenance.

The invention discloses a physics teaching experiment auxiliary device, and relates to the technical field of teaching auxiliary equipment. The device comprises a bottom plate, and the top of the bottom plate is provided with a magnet and an ampere meter. A switching mechanism is arranged at the top of the bottom plate and comprises a vertical plate fixedly connected to the top of the bottom plate and a motor rotationally connected to one side of the vertical plate. Through cooperation of the conversion mechanism and the rotation adjusting mechanism, key variables such as the magnetic field intensity, the number of coil turns and the magnet insertion speed can be flexibly adjusted, students can visually observe the influence of different variables on induction current, the quantitative relation of electromagnetic induction is deeply understood, the device supports demonstration of various experiment scenes, and the teaching efficiency is improved. Comprise the current change when the magnet is inserted into or pulled out of the coil, the influence of the magnetic field intensity change on the induction current, the induction current difference under different coil turns and the like, the teaching content is enriched, and the diversity and interestingness of the experiment are improved.

The utility model discloses a calibration device for a track circuit dynamic detection system, and relates to the technical field of track circuit dynamic detection. The device comprises a signal source module, a power amplifier, a load resistor and an ampere meter, the controller outputs a control signal to the signal generator; the signal generator outputs a current signal to the gain regulator based on the control signal; the gain regulator outputs the current signal after gain regulation to the power amplifier based on the current signal; the power amplifier outputs an amplified current signal to the load resistor based on the current signal after gain adjustment; according to the utility model, the precision and the stability of the output current signal can be improved, and the stability, the accuracy and the efficiency of the calibration of the track circuit dynamic detection system can be improved.

The invention discloses an electric energy meter operation state inspection and evaluation method and system, and relates to the technical field of electric power metering safety, and the method comprises the steps: collecting and preprocessing the electrical working data of an electric energy meter, obtaining the reference current and working current of the electric energy meter, extracting error features, and generating a current error signal; carrying out voiceprint collection on the electric energy meter, and capturing a voiceprint signal of the ammeter; converting the voiceprint signal into a discrete pulse sequence through a coding algorithm, and obtaining a standardized pulse sequence through dimension conversion and optimization compression; performing feature extraction on the standardized pulse sequence by applying a pulse neural network, and obtaining fault probability distribution through synaptic weight calculation and neuron state updating after obtaining pulse sequence features; the feedback control signal and the electric energy meter evaluation report are generated based on the fault probability distribution, and the problem of poor real-time performance of fault mode recognition is solved.

The invention relates to the technical field of intelligent electric meters, in particular to an intelligent electric meter correction method and system based on an error source, and aims to improve the correction accuracy of the intelligent electric meter. According to the main scheme, if an ammeter error probability value in a current time period is greater than a preset probability value and an error influence value is greater than a preset influence value, an error source of the intelligent ammeter is determined according to time sequence data of the intelligent ammeter; respectively calculating corresponding target compensation values according to the shunt fault error, the reference source fault error, the phase fault error and / or the aging fault error and the corresponding adjustment coefficients; compensating the original measurement value of the intelligent electric meter through the target compensation value to obtain a corrected measurement value; calculating a residual error according to the corrected measurement value and the electric energy value of the standard meter; and if the residual error is greater than a preset precision threshold, adjusting the adjustment coefficients corresponding to the shunt fault error, the reference source fault error, the phase fault error and / or the aging fault error.

The invention relates to the technical field of high-voltage direct-current cable insulation state monitoring, and discloses a direct-current cable dielectric loss and leakage current synchronous monitoring device and method, and the device comprises a harmonic direct-current source, a monitoring filtering module, a detected cable and a grounding end. The harmonic direct-current source is used for outputting direct-current high-voltage excitation containing power frequency fundamental waves and harmonic components; the monitoring filtering module is connected in series with a measured cable, the monitoring filtering module comprises a measuring resistor and a measuring capacitor which are arranged in parallel, and the measuring resistor and the measuring capacitor are respectively connected in series with a first ampere meter and a second ampere meter; the first end part of the detected cable is connected with the monitoring filtering module, and the second end part is connected with the harmonic DC source and the grounding end. According to the method, the leakage current and the dielectric loss of the direct current cable can be monitored at the same time, real-time online monitoring is achieved by simplifying system configuration, and the monitoring precision and reliability are improved.

The invention discloses a digital voltage compensation method, which relates to the technical field of power systems, and comprises the following steps: monitoring output voltage signals and load current signals of each point of a power grid in real time, establishing an output voltage digital sequence and a load current digital sequence, and extracting dynamic characteristic variables of current load current representing the change trend of a future time period; judging the working mode of the current running state; based on the voltage digital sequence, comparing with the reference voltage, calculating a real-time-reference voltage feedback compensation amount, taking the dynamic characteristic variable as input, establishing a load-voltage response prediction model, generating a voltage deviation prediction value in a future control period, and obtaining a voltage feed-forward compensation amount; and the current working mode is identified according to the working mode, a dynamic weight coefficient is given to the real-time-reference voltage feedback compensation amount and the voltage feed-forward compensation amount, the final compensation control amount of the voltage of each point of the power grid is calculated, and a driving signal is generated to dynamically adjust the voltage of each point of the power grid in real time and accurately. The power quality of the power grid is improved.

The utility model relates to the field of liquid film thickness measurement, and discloses a device for measuring the thickness of a surface liquid film, which comprises an annular fixer, an annular rotator, an annular guide rail and an annular gear, the rotating motor drives the annular rotator to rotate in the circumferential direction through the annular gear. The electric horizontal guide rail is fixed to the annular rotator and drives the sliding block to move axially, the stepping motor and the probe are arranged on the sliding block, and the stepping motor drives the probe to advance and retreat in the radial direction. The probe, a power supply, an ampere meter and a circuit switch form a detection loop, the rotating motor, the stepping motor and the electric horizontal guide rail are connected with a computer through data lines for control, and circumferential-axial multi-point liquid film thickness measurement is achieved.

The invention provides an assembly line type instrument and meter inspection, storage and distribution integrated operation platform which comprises a platen, a rotating disc is arranged at the top of the platen, a rotating column is fixed to the bottom of the rotating disc, an inserting rod is driven to move through a second electric push rod, a clamp type ampere meter is extruded and pushed from the rear end of a containing frame to move to an outlet in the foremost end of the containing frame, and the clamp type ampere meter is arranged on the platen. A third electric push rod drives a clamping block to clamp the two sides of the clamp-type ammeter, and after a limiting plate and an extrusion plate of the detection assembly make contact with the two sides of the clamp-type ammeter to be detected, a bidirectional telescopic plate synchronously drives a sliding frame to move along a sliding rail, and the clamping block is pushed to move downwards through a first connecting rod. The clamp-type ampere meter is pushed out from the outlet end of the containing frame, the position of a baffle is extruded to be opened, the clamp-type ampere meter is inserted into the containing frame at the bottom, then the extension end of a third electric push rod is retracted, clamping of the clamp-type ampere meter is relieved through a clamping block, the clamp-type ampere meter falls into the containing frame, and the follow-up testing and sending-out process is carried out through rotation of a rotary disc.

The present application relates to the field of current measuring fittings, and specifically discloses a large-current measuring power fitting and a measuring method thereof, which solves the problem of poor flexibility and large error caused by large conductor resistance value of the existing large-current measuring power fitting which is generally fixed in series in a circuit, and proposes the following scheme, which comprises an outer frame, a mounting plate, a sliding frame, an ammeter, a supporting plate, a clamping seat, a clamping piece, a supporting seat, a rotating shaft, a clamping rod, a clamping jaw, a copper bar, a wire connection terminal, a meter connection terminal, a clamping assembly, a sliding frame, a separation assembly, an extension piece, a push seat, an insulating cover, a gear, a double-sided rack, and a cover setting assembly, the cover setting assembly is used to drive the double-sided rack to slide after the two push seats are separated from each other and the sliding frame, so that the upper and lower insulating covers are rotated towards each other, and the copper bar is protected by the insulating cover. The present fitting is flexible, convenient to replace the conductor, accurate to measure different current values, and safe to use.

The utility model discloses a high-frequency current measuring circuit, and the circuit comprises a sampling circuit which receives a to-be-measured high-frequency current, converts the high-frequency current into a sampling signal, and outputs the sampling signal; the effective value conversion circuit is connected with the sampling circuit, receives the sampling signal, and performs multiplication operation on the sampling signal to output an effective value signal; the CPU is connected with the effective value conversion circuit, receives the effective value signal, processes the effective value signal into a digital signal and outputs the digital signal; and the display module is connected with the CPU and is used for receiving and displaying the digital signal. According to the utility model, an effective value conversion technology is adopted, an electronic circuit is adopted to replace a thermoelectric high-frequency ammeter, the structure is simplified, and the cost is reduced; and the measuring range is large and can reach several amperes, the precision is high, and the reading is visual.

A finite size abnormal reflection super surface design and surface impedance optimization method based on integral equation, comprising the following steps: step 1: determining the size of the abnormal reflection surface unit of the actual project; step 2: obtaining the number of super surface units in the finite size direction through the finite size / super surface unit size, and forming a super surface array; step 3: dividing each individual super surface unit into impedance pieces of equal length in the finite size direction; step 4: further dividing each small impedance piece into sub-units of equal length in the finite size direction; step 5: simulating electromagnetic waves in the form of plane waves to 0° incidence of the super surface array, generating surface current, and the surface current will excite a scattering field; the scattering field reaches the ideal state in the target direction. The impedance surface proposed in the application can be designed for any large-angle abnormal reflection angle requirement and any target size, greatly improving its practicability in future application scenarios.

The embodiment of the invention discloses a current detection circuit and current detection equipment, the current detection circuit comprises a power supply input interface, a power supply output interface and a detection circuit, and the power supply output interface is connected with a circuit to be detected; the detection circuit comprises a shunt unit, a first connecting end, a second connecting end and a third connecting end, the shunt unit is connected between the first pole of the power input interface and the second connecting end, a first ampere meter is connected between the first connecting end and the second connecting end, and a second ampere meter is connected between the second connecting end and the third connecting end; when the current of the to-be-tested circuit is greater than a preset threshold value, the shunting unit is conducted, and the current drives the second ammeter to generate pointer deflection through the shunting unit; when the current of the to-be-tested circuit is smaller than a preset threshold value, the shunting unit is switched off, and the current drives the first ammeter to generate pointer deflection; wherein the first ampere meter and the second ampere meter are different in measuring range. The test efficiency and reliability can be improved.

1. The name of the design product: ammeter. 2. The use of the design product: for measuring and displaying current. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

An electric vehicle supply equipment (EVSE) calibration device includes a primary conductor, one or more calibration coils, and an ammeter having one or more sensors. The ammeter is coupled to the primary conductor. In the EVSE calibration operating mode, the primary conductor conducts an EVSE current, and the ammeter measures a value indicating a first current induced in one or more sensors by the EVSE current conducted by the primary conductor. In the second operating mode, one or more calibration coils conduct a calibration current, and the ammeter measures a value indicating a second current induced in one or more sensors by the calibration current conducted by one or more calibration coils. The sensors may include sensing coils, magnetic flux sensors, and the like.

1. Name of the designed product: wireless ammeter. 2. Use of the designed product: belongs to the field of electric power measurement, used for measuring current. 3. Design points of the designed product: in the overall shape of the product. 4. Picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The invention relates to a locking type steel wire thread insert vibration test clamp device and a vibration test method, which are suitable for vibration examination of a locking type steel wire thread insert in a free state in an aero-engine. The device comprises a clamp base body, a bolt connecting hole, an O-shaped groove and an induction block. The clamp base body is rigidly connected with the electromagnetic vibration table through a bolt, the O-shaped groove is used for installing a steel wire thread insert test piece, the induction block is made of piezoelectric crystal materials, and when the steel wire thread insert vibrates to reach the set amplitude, the induction block is contacted to generate induction current to drive the induction lamp or the ampere meter to display. The test method comprises seven steps of system connection and preparation, parameter setting and starting, vibration amplitude monitoring, amplitude adjustment, assessment state confirmation, vibration assessment execution and test ending. Through a closed-loop control system formed by an external source signal generator and a laser displacement sensor, single-degree-of-freedom fixed-amplitude vibration in a non-resonance state is realized, the amplitude control is accurate, overload is avoided, parallel testing of multiple test pieces is supported, the test efficiency is improved, the method is closer to actual working conditions, and the method has higher engineering application value.

The invention relates to the field of current measurement fittings, particularly discloses a large-current measurement electric power fitting and a measurement method thereof, and solves the problems that an existing large-current measurement electric power fitting is generally fixedly connected in series in a circuit, the flexibility is poor, the resistance value of a conductor is large, and large errors are prone to being generated. The device comprises an outer frame, a mounting plate, a sliding frame, an ampere meter, a supporting plate, a clamping seat, a clamping piece, a supporting seat, a rotating shaft, a clamping rod, a clamping jaw, a copper rod, a wire connection electric terminal, a meter connection electric terminal, a clamping assembly, a sliding frame, a separating assembly, a telescopic piece, a pushing seat, an insulating cover, a gear, a double-sided rack and a covering assembly, and the double-sided rack is driven to slide, so that the upper and lower insulating covers approach each other to rotate, and the copper rod is protected by the insulating covers. The fitting can be used flexibly, the conductors can be replaced conveniently, current values of different sizes can be measured accurately, and the fitting is safe to use.

1. Name of the product in this design: Demonstration Ammeter. 2. Purpose of this design: For measuring current. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model provides an RMP testboard and test system, which comprises a testboard body, a panel arranged at the front end of the testboard body and a backboard arranged at the rear end of the testboard body, and is characterized in that the panel comprises a voltage and current monitoring area provided with a voltmeter and an ampere meter and used for monitoring voltage and current; the switch area is provided with a power switch area and a discrete magnitude control switch area; the connecting area is provided with a connector J1; the test area is provided with a test hole area and a test indicating lamp area; wherein the test hole area is provided with a power supply output test hole, a discrete magnitude output test hole, a 429 bus test hole and a grounding hole; the back plate is provided with a power input interface; the RMP test board is simple in overall structure and low in manufacturing cost and later maintenance cost, the RMP test board is in communication connection with the to-be-tested panel, the bus analyzer and the oscilloscope are combined to achieve RMP function testing, limitation of special test equipment is eliminated, practicability is high, and the RMP test board is suitable for application and popularization.

The present application belongs to the technical field of ammeter, and discloses a double-display power ammeter for experiment table, which comprises an experiment table, an integrated power supply box fixedly connected to one side of the lower end of the experiment table, and a strip-shaped clamping seat fixedly connected to the upper end of the experiment table, further comprising: an experimental measurement power component installed on the strip-shaped clamping seat, which comprises an ammeter main body; the structure cooperation of the inner shaft ring, the outer shaft ring, the transparent anti-misconnection surface ring, the wiring opening and the outer pointer hand shaft is set, the outer pointer hand shaft drives the inner shaft ring, the outer shaft ring and the transparent anti-misconnection surface ring to rotate, the wiring opening on the transparent anti-misconnection surface ring is only open when it is aligned with the correct wiring point, and shields the redundant wiring position when it deviates from the correct point, effectively avoiding the damage of the instrument caused by the students' misconnection of the range and the wrong connection of the wiring column, solving the problem that the existing ammeter is easy to be burned due to misoperation, and improving the safety and standardization of the experimental operation.

A portable, open-type clamp-on non-invasive ammeter device (1) is capable of determining the production status of industrial machines by acquiring and analyzing current measurement samples. Data and parameters are analyzed and transmitted via the Internet by an embedded printed circuit board (PCB) and its components (48). Production status refers to the activities the machine is currently engaged in. Users can pre-define a list of production status names and enter their corresponding current threshold limits. The device (1) is responsible for comparing current measurements with these pre-determined threshold limits to determine the latest production status of the monitored machine. Among its many features, the device (1) includes: a reset button (20), a status light (21), a power input port (19), a plastic housing (18), a PCB (48), and an ADC. Optional features include an mountable adhesive or magnetic base (49) and a rechargeable battery.

The present application relates to a self-sensing magnetic liquid damping vibration absorber and a preparation method thereof. The self-sensing magnetic liquid damping vibration absorber is used to be installed on the structure to be damped. The self-sensing magnetic liquid damping vibration absorber includes: a shell, an insulating tube, two high charge density parts, two conductive parts, a permanent magnet, and an ammeter. The self-sensing magnetic liquid damping vibration absorber combines power generation indication with vibration reduction based on dynamic double electric layer power generation technology and the second-order buoyancy principle of magnetic liquid, thereby realizing vibration monitoring and vibration reduction at the same time, and is not affected by other environmental factors. It only indicates and reduces vibration, achieving the effect of stable vibration monitoring and vibration reduction.

The utility model relates to circuit detection equipment, in particular to a non-contact quick connection device for power grid line fault detection, which comprises a clip-on ammeter, a conduction piece is connected onto the clip-on ammeter, a traction piece is connected onto the conduction piece, and the bottom of the clip-on ammeter is in threaded connection with one end of a telescopic piece. According to the utility model, through the cooperative design of the conduction piece, the traction piece and the telescopic piece, when the tong-type ammeter detects a far circuit, the tong-type ammeter can be sent to the far circuit through the telescopic piece, and through the traction and pulling of the traction piece, the handle of the tong-type ammeter can be adjusted, so that the detection precision is improved. According to the clamp-on ammeter, the jaw of the clamp-on ammeter is opened, and the jaw is used for enveloping and clamping a circuit, so that the clamp-on ammeter can be used for conveniently overhauling circuits in far places or places where overhauling personnel cannot reach conveniently and circuits with soft wire materials and small diameters, and the overhauling and using effects are improved.

The application discloses a device for measuring the levelness of a long object and a use method thereof. The device comprises a trolley and a measuring device. The trolley comprises a trolley frame, and front and rear wheels arranged at the bottom of the trolley frame. The measuring device comprises a semicircular transparent sealing cover arranged on the trolley frame, a power supply, a sensitive ammeter, a processor, and first and second rotation angle sensors arranged on the front and rear wheels and connected to the processor. The semicircular transparent sealing cover is filled with insulating liquid, and the inner side of the semicircular transparent sealing cover is provided with a semicircular sliding resistor. A rotatable metal float needle is arranged at the center of the semicircular sliding resistor. A sliding ring in contact with the semicircular sliding resistor is arranged on the front side of the metal float needle. An air float ball is arranged at the front end of the metal float needle. The semicircular sliding resistor, the end of the metal float needle, the sensitive ammeter and the power supply form a loop, and the sensitive ammeter is connected to the processor. The application can quickly measure the levelness of a long object, reduces the input of manpower and material resources, improves work efficiency, and reduces equipment maintenance costs.

The invention discloses a parallel plate ion mobility measuring device and method for field observation. The equipment comprises a three-layer parallel flat plate ion current assembly, an electric field measuring instrument, a first direct-current power supply, a second direct-current power supply, an ampere meter and a measurement and control device, the three layers of parallel plate ion current assemblies are used for generating ions and forming a synthetic electric field; the ampere meter is used for being connected with the three-layer parallel flat plate ion current assembly and generating a current reading for indicating the density of the ion current; the electric field measuring instrument is arranged right below the three layers of parallel plate ion current assemblies and is used for generating a field intensity reading for indicating the size of a synthetic electric field; and the measurement and control device is used for executing a self-calibration program and a self-measurement program of the electric field measurement instrument so as to control the output voltage of the first direct-current power supply and the output voltage of the second direct-current power supply, obtain a current reading, obtain a field intensity reading and calculate the ion mobility. The system is high in accuracy, high in stability, convenient to use, good in portability and high in automation degree.