426 results about "Ammeter" patented technology

The invention relates to the technical field of ammeter monitoring, in particular to a detection method and system for ammeter load optimization, and the method comprises the following steps: collecting voltage and current data based on a load access terminal, judging synchronous offset, recognizing a dominant channel change mode, adjusting sampling rhythm configuration, and constructing amplitude mapping between voltage and power; and analyzing a multi-cycle response trend and classifying load states to obtain a load feature distribution label. According to the invention, by constructing a time sequence comparison structure of voltage and current signals in the same period, the identification capability of channel synchronization characteristics is enhanced, the interference of periodic rhythm drift on data sampling is avoided, the channel dominant trend is judged according to the spacing change proportion, the difference source has clear guidance, and the fluctuation identification precision is improved. In combination with a dynamic regulation and control strategy of a sampling rhythm, adaptive distribution of sampling frequency bands of key channels is realized, the detection granularity is improved, linkage expression among multi-channel signals is completed, and the depiction depth of a load response structure is enhanced.

The invention relates to the technical field of electricity meter metering, and discloses an electricity meter adaptive error compensation method and system, and the method comprises the steps: calibrating an electricity meter, collecting baseline data under different environment conditions, and recording a measurement error; environment data and ammeter data are collected in real time through an ammeter, and key features are extracted; constructing an error model, and predicting the error of the current ammeter data; and performing real-time correction and parameter adjustment according to the prediction error, and outputting the corrected measurement data. By introducing a real-time error prediction and dynamic compensation mechanism based on environmental data and combining a particle swarm optimization algorithm to optimize regularization parameters in a ridge regression model, the measurement precision of the electric meter under a complex environmental condition is effectively improved. The method can adaptively adjust the measurement data of the electric meter, reduces errors caused by environmental factors, improves the accuracy and stability of electric power measurement, and provides more reliable data support for an electric power management and monitoring system.

The invention relates to the technical field of electric meter data transmission, in particular to an intelligent electric meter multi-mode communication low-power-consumption control and data compression combined processing method. If the ammeter temperature is greater than the temperature threshold, calculating the heat dissipation coefficient of the ammeter according to the heat dissipation parameter; determining the maximum operation power of the ammeter according to the heat dissipation coefficient; judging whether the state of the electricity meter is abnormal or not according to the operation parameters, if the electricity meter works normally, selecting an LPWAN technology for data transmission and selecting a data compression mode according to a data change period, responding to the abnormal work of the electricity meter, adjusting the emission frequency according to the accumulation amount of key data, and after the adjustment of the emission frequency is completed, performing data compression. And determining a data compression and communication mode according to the maximum operation power. By calculating the heat dissipation coefficient and determining the maximum operation power according to the heat dissipation coefficient, the electric meter can operate in a safe power range, so that the operation stability of the electric meter is improved.

The invention relates to the technical field of energy storage systems, and discloses a multi-type ammeter mixing method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining the ammeter types of a plurality of ammeters connected to the same communication port; configuring a communication address for each electricity meter according to the type of the electricity meter and a preset serial number or configuring a communication address for each electricity meter according to an address label; and establishing communication for each electricity meter according to the communication address. According to the invention, the same communication port can be compatible with the access requirements of different types of ammeters, the method is suitable for a complex scene in which multiple ammeters coexist, the tolerance of the energy storage system to different ammeters is improved, and the problem that the same communication port is difficult to adapt to the mixed use requirements of multiple types of ammeters is solved.

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 relates to the technical field of resource recovery and waste treatment, and discloses an automatic treatment system for a scrapped ammeter, and the system comprises an ammeter recognition and modeling module which is used for carrying out the structure scanning of the scrapped ammeter, recognizing the spatial layout and connection relation of the internal components of the ammeter, and building a topology model representing the connection between the components; the multi-target optimization module is used for carrying out optimization calculation on the disassembly path according to target requirements of efficiency, energy consumption and resource recovery rate and generating an optimal path, the invention further provides an automatic processing method of the scrapped ammeter, and the method comprises the following steps: identifying and modeling the ammeter, scanning the scrapped ammeter to identify the spatial layout and the connection relation of the components, and carrying out automatic processing on the scrapped ammeter; and establishing a topological model. Through the combination of multi-objective optimization, dynamic topology updating and a real-time feedback mechanism, the efficiency and flexibility of scrapped ammeter processing and the comprehensive improvement of the resource recovery rate are realized.

The invention discloses a fault identification method and system of an intelligent electric meter, and belongs to the field of fault identification of the intelligent electric meter, and the method comprises the following steps: collecting the electric parameter data of a historical electric meter and the power consumption parameter of each electric device, and obtaining the standby power consumption parameter of the electric device; setting standby power consumption base lines in different time periods including working days and rest days, and triggering early warning when the deviation between the real-time power consumption and the base lines exceeds a preset threshold value; performing fault prediction according to the triggered early warning to obtain a specific fault; obtaining an abnormal reason of an abnormal point in the historical electricity meter electric parameter data, carrying out correlation analysis on the historical abnormal point and a predicted fault, obtaining the abnormal reason of the abnormal point with the highest correlation, and taking the abnormal reason as a fault reason after verification and outputting the abnormal reason; according to the invention, through obtaining the ammeter data, the power consumption of each device and the standby power consumption, the personalized baseline is established in combination with different time periods, time and seasons, the abnormality of the ammeter is accurately identified, and fault misjudgment caused by high standby power of the device is effectively avoided.

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 utility model discloses a guide rail type ammeter with arc identification, which relates to the technical field of guide rail type ammeters and comprises a shell, a sensor and a mounting plate, the sensor and the mounting plate are positioned on two sides of the shell, and moving assemblies are arranged at one end of the shell and one side of the sensor and the mounting plate; the moving assembly comprises two moving rods, a mounting shell, a fixed cover and a driving mechanism, the driving mechanism is arranged on one side of the sensor and one side of the mounting plate, the two moving rods are slidably mounted at the top end of the shell and fixedly mounted on the two sides of the mounting shell, and the fixed cover is fixedly mounted at the top end of the mounting shell through bolts; according to the technical scheme provided by the utility model, by arranging the moving assembly, when the sensor detects a fault arc, the interior of the electric meter can be powered off, and the driving mechanism is controlled to drive the moving rod to ascend, so that the connector is separated from the connecting end, the electric meter can be separated from the connecting wire, and the damage to the electric meter caused by high temperature at the connecting part of the connecting wire and the electric meter is reduced; and the safety is improved.

The present application relates to the technical field of cable waterproof detection, and specifically discloses a high flame-retardant cable waterproof grade detection device, which includes a bending disc. The bending disc includes a semi-circular part and a rectangular part. A bending assembly is arranged inside the semi-circular part, and a spraying group is also arranged inside the semi-circular part. A driving mechanism is arranged on the mounting seat. The two ends of the cable are respectively connected to the positive and negative electrodes of the power supply and are connected with an ammeter. The bending assembly in the present application bends the part of the cable located in the semi-circular part, amplifies the relatively small gaps existing on the cable. After amplification, the sprayed water can more directly contact the metal wires inside the cable, thereby affecting the resistance of the cable, and the value of the ammeter will change, so the detection result is more accurate. The driving mechanism in the present application can clamp and rotate the cable and clamp and move the cable. By using the clamping rotation and clamping movement, the outer insulating layer of the entire cable can be stretched, so a comprehensive waterproof detection of the cable can be carried out.

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 invention discloses an ammeter phase sequence deviation rectifying method, and relates to an ammeter phase sequence deviation rectifying device, the device comprises an ammeter, a current transformer and an upper computer, the ammeter is provided with an MCU, the current transformer is connected with the MCU of the ammeter and is used for being installed on an electric wire in a sleeving mode to sense the current of the electric wire, and the ammeter is in communication connection with the upper computer through the MCU; the method comprises the following three conditions: the first condition is connection detection of the current transformer; the second condition is reverse connection correction of the current transformer; and the third condition is line sequence deviation correction of the current transformer. According to the invention, the connection state of the current transformer can be detected, and the detection accuracy and stability are improved; when the current transformer is reversely connected, the power utilization data can be corrected, so that the detection accuracy is ensured, the current transformer does not need to be reconnected, and the operation is convenient; when the current transformer is wrongly connected, the current sampling channel corresponding to the current transformer can be adjusted, the current transformer does not need to be reconnected, and the operation is flexible.

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 edge data transmission, and discloses an intelligent electric meter edge data transmission method and system based on Bayesian dynamic gaming, and the method comprises the steps: mapping the channel state data of an electric meter to a frequency band set according to the center frequency of a channel, and enabling the channel state data to serve as a frequency band resource pool of the electric meter; a Bayesian probability graph model is adopted to deduce power consumption behavior space-time distribution characteristics of the user, and a power consumption activeness probability distribution graph of the user is output; and constructing a non-cooperative game model oriented to frequency band distribution and solving to obtain an optimal frequency band use strategy of each ammeter, performing ammeter working channel distribution, and performing edge data transmission by using the distributed ammeter working channels. According to the method, the electric meter channel state and the user historical power consumption data are collected, the Bayesian graph model is constructed to deduce the user active probability distribution, the user active probability distribution is introduced into the non-cooperative game model, the optimal channel allocation strategy of each electric meter is realized through the Bayesian Nash equilibrium solver, and the edge data transmission efficiency is improved.

The invention discloses an energy storage system and a method for correcting the collected power of an electric meter of the energy storage system. The method for correcting the collected power of the electric meter of the energy storage system comprises the following steps of S1, controlling the i-th phase independent output power of an inverter; s2, the ammeter collects the voltage, current, active power and apparent power of each phase of the power grid, and calculates the absolute value of the power factor of each phase of the power grid according to the active power and apparent power of each phase; s3, determining the CT wiring condition of the ammeter according to the absolute value of the power factor of each phase of the power grid; and S4, correcting to obtain the real apparent power and the real active power of the ith phase of the power grid by combining the voltage and the current of each phase of the power grid and the CT wiring condition of the electricity meter. According to the energy storage system and the ammeter acquisition power correction method thereof, the CT wiring condition is identified through the absolute value of the power factor, and correct power data can be directly recovered.

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 new energy automobile charging safety inspection metering calibration equipment and a control method thereof. The equipment comprises a direct current charging metering calibration module, an insulation resistance calibration module and a potential equalization calibration module, the DC charging metering calibration module comprises a DC charging gun base, a BMS simulator, a high-precision ammeter and a high-precision voltmeter. The insulation resistance calibration module comprises a main control unit, a high-precision resistor, a high-voltage switching unit and an alternating-current charging gun base, the potential equalization calibration module comprises a high-precision galvanometer, a high-precision voltage source and a low-voltage switching unit, and the low-voltage switching unit comprises a low-voltage relay set, a first banana head interface and a second banana head interface. The AC charging gun base is connected to the calibration circuit through the low-voltage relay group. By integrating the high-precision measurement module, the resistance switching unit and the BMS simulator, one-key calibration of direct-current charging, insulation resistance and potential equalization is realized, and the problems of contact resistance interference and multi-instrument collaboration are solved.

The utility model discloses a pointer type ammeter with an overload protection device, and belongs to the technical field of electrical instruments. A pointer type ammeter with an overload protection device comprises a housing, a dial, a rotating shaft and a pointer, the dial is provided with a circular hole, the rotating shaft penetrates through the circular hole, the pointer is connected with the rotating shaft, the pointer is located above the dial, the pointer type ammeter also comprises a hairspring arranged on one side of the rotating shaft, one end of the hairspring is fixed on the dial, and the other end of the hairspring is fixed on the housing. And the other end of the hairspring is opposite to the pointer. The pointer type ampere meter with the overload protection device can protect itself when overload occurs in the current transmission process.

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.

A portable ammeter detection device disclosed by the present invention comprises a detector and a test unit on the detector, one side of the detector close to an ammeter is provided with a plurality of detection heads, the bottom of the detector is provided with a bottom plate, the bottom plate is provided with a positioning assembly, and through the arrangement of the positioning assembly, the stable clamping effect of the ammeter needing to be detected is improved. The problem that an ammeter and a detector may shift in a vibration scene only through magnetic adsorption is solved, the assembly stability is improved, through cooperation of a first push plate, a push rod, a connecting rod, an adjusting gear and an adjusting rack, the effect of automatically adjusting the angle of a detection needle is achieved, and the detection precision is improved. Therefore, the detection needle can be accurately in butt joint with a conducting strip in a voltage terminal set, the problem of poor contact or false detection caused by probe displacement is solved, and the butt joint stability of the detection head and a voltage terminal port is improved through cooperation of the first push plate, the groove and the first push handle.

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.