125 results about "Electromagnetic emission" patented technology

The invention discloses an electromagnetic emission test method of an intelligent household electrical appliance, which simulates a dynamic interaction process by controlling multiple modules to run simultaneously according to a preset logic, and comprises the following steps: acquiring electromagnetic signals in real time and performing frequency domain conversion to obtain frequency spectrum distribution; identifying a target frequency band which generates energy convergence due to non-linear superposition and peak intensity of the target frequency band; obtaining a superposition waveform sequence and classifying a nonlinear superposition mode; identifying an abnormal interference mode by combining the peak intensity and a mode classification result; associating the abnormal frequency band with the module operation log, and analyzing an interaction time sequence and logic to determine a cause; a filtering or regulation strategy is applied based on the cause, whether the peak value is reduced is verified and a report is generated. According to the invention, through energy convergence frequency band identification, non-linear superposition mode classification, interference cause tracing, directional regulation and closed-loop verification, accurate diagnosis and root positioning of hidden transient interference are realized, so that the test depth is improved, the rectification efficiency is optimized, and the predictability of product electromagnetic compatibility design is enhanced.

The invention belongs to the technical field of seabed hole domain electromagnetic detection, and relates to a hybrid multi-frequency reactive compensation method for a seabed electromagnetic emission system, which comprises the following steps of: designing a topological structure of a hybrid multi-frequency reactive compensation system according to an impedance matching requirement of a low-frequency emission frequency band of the seabed electromagnetic emission system; deducing a compensation strategy and an implementation method of the hybrid multi-frequency reactive power compensation system based on the multi-frequency reactive power compensation requirement of the load; and analyzing the influence of the reactive compensation combination proportion of the impedance matching part of the passive TCC and the impedance matching part of the active ICC on the requirement of the direct-current power supply voltage VICC, and carrying out parameter design of the passive TCC and the active ICC. According to the hybrid multi-frequency reactive compensation technology, the single-frequency reactive compensation capability is further expanded into self-adaptive dynamic compensation of multi-frequency reactive power in a wide frequency band; the additionally introduced active impedance matching part effectively improves the multi-frequency impedance matching precision, and the frequency spectrum energy utilization rate of multi-frequency transmitting signals is further improved in a low-frequency transmitting frequency band.

The invention belongs to the technical field of electromagnetic detection, and particularly relates to a self-adaptive multi-frequency resonance matching system and a design method, the self-adaptive multi-frequency resonance matching system comprises a magnetic coupling resonance module and a controllable variable impedance unit which are connected in series, a switch control capacitor comprises a matching capacitor and a control switch which are connected in parallel, and a switch control inductor comprises a matching inductor and a control switch which are connected in series; the magnetic coupling resonance module comprises an inductor and a capacitor, and the capacitor is connected with the inductor in parallel and then connected with the inductor in series. The signal strength of the multi-frequency grounding type electromagnetic transmitter is improved, and efficient transmission of the multi-frequency excitation signals is achieved.

The utility model discloses an electromagnetic induction eddy current heating electromagnetic emitter with magnetic shielding, the electromagnetic emitter comprises a magnetic shielding cover (1), a coil (2) and a coil support (3), the coil (2) comprises a coil main body (21) formed by conducting wires and a pair of coil pins (22), the coil support (3) comprises a support wall (31), a support bottom (32) located at the lower end of the support wall (31) and a pin through hole (33), and the support wall (31) is connected with the support bottom (32). The coil body (21) is arranged on the coil support (3), the coil pins (22) penetrate out of the pin through holes (33), and the coil body (21) is located in a coil space (14) defined by the coil support (3) and the magnetic shielding cover (1). The structure of the magnetic induction coil assembly is simplified, the magnetic shielding efficiency is improved, the provided electromagnetic emitter is high in integration degree, large-scale assembly production is facilitated, and the production efficiency of electronic cigarette appliances can be effectively improved.

The utility model relates to security door technical field especially relates to a kind of contraband security door detection device, including shell, blocking cross bar and drive assembly, the inside of shell is provided with stand, the outside of stand is provided with electromagnetic transmitter, the inside of shell is provided with electromagnetic receiver, the outside of stand is provided with rotating blocking cross bar, the top of shell is provided with detection camera, the side of shell is provided with partition wall and is divided into entrance side and exit side;The utility model is formed by shell and stand Rotary channel, and three sets of electromagnetic transmitter and electromagnetic receiver are set in channel to carry out repeated detection, reduce detection error rate, and the face is detected by detection camera at entrance, when there is dangerous personnel with dangerous cutter or detect that the personnel escape, personnel can be detected in shell, limit component is used to limit and stop rotating to blocking cross bar, personnel is locked in shell, prevent personnel escape or use cutter to suddenly rise and hurt person.

The invention discloses an ultrahigh-voltage constant-voltage clamping transmitting system for an electrical source transient electromagnetic method, and belongs to the technical field of ultrahigh-voltage constant-voltage clamping. Comprising a main power supply, an auxiliary power supply, a clamping capacitor, a main switch bridge circuit, a clamping switch, a current sampling module, a peak holding module, a comparator and a controller. According to the invention, the waveform quality of the high-power electromagnetic transmitter can be effectively improved, and the transmitting performance is improved from two aspects of a rising edge and a falling edge. Development of a near-source electromagnetic method including SOTEM is promoted, and more powerful technical support is provided for a deep prospecting strategy.

The invention discloses a muzzle arc energy and mass center spatio-temporal evolution analysis method and system, and relates to the technical field of muzzle arc analysis, and the method comprises the steps: building an electromagnetic track launch muzzle arc simulation experiment platform, and obtaining a muzzle arc image through a high-speed photographing system; an arc contour image is obtained based on a local adaptive threshold segmentation and morphological gradient extraction algorithm, and the integrity and robustness of arc contour extraction are improved; based on a robust centroid tracking algorithm of multi-connected domain energy fusion and time sequence consistency constraint, a final arc centroid is obtained, and stable positioning and tracking of the arc energy centroid in the full evolution stage are achieved; and quantitatively analyzing the time-domain evolution characteristics of the highlighted area of the muzzle arc and the law of the spatial motion trail of the mass center of the highlighted area based on the muzzle arc images at different muzzle speed. An effective means is provided for quantitative characterization of a bore port arc, and an experimental basis and a theoretical reference are provided for optimization of a bore port structure, anti-ablation design, regulation and control of emission working conditions and the like of an electromagnetic emission system.

The utility model discloses a vehicle-mounted electromagnetic propulsion remote fire extinguishing device, which belongs to the technical field of fire fighting equipment and comprises a vehicle body with a chassis, and a plurality of support legs are distributed on the outer edge of the chassis; the supporting leg comprises a horizontal telescopic part and a vertical telescopic part, the horizontal telescopic part comprises an outer sliding barrel and an inner sliding barrel, and the inner sliding barrel is connected with a first driving assembly for driving the inner sliding barrel to move; the vertical telescopic part comprises a bottom foot, a ball head rotationally connected with the bottom foot is arranged on the bottom foot, the ball head is connected with a second driving assembly for driving the ball head to move, and the second driving assembly is fixed to the inner sliding barrel; the electromagnetic emission assembly, the pulse power supply and the generator are all arranged on the chassis; the pulse power supply is connected with the electromagnetic emission assembly. The generator is connected with the pulse power supply and the electromagnetic emission assembly. The chassis can bear the electromagnetic emission assembly, the pulse power supply and the generator, the pulse power supply and the generator guarantee that the electromagnetic emission assembly provides electric energy, the supporting legs can provide supporting force for the chassis, and recoil force can be stably borne.

The invention discloses a strong electromagnetic protection design method for an electronic warfare unmanned aerial vehicle, and relates to the technical field of electromagnetic protection, electromagnetic interference and electromagnetic compatibility. Establishing an electromagnetic simulation model of the unmanned aerial vehicle and the electronic warfare load, and simulating the electromagnetic environment of the key position; distributing electromagnetic protection indexes of the electronic equipment according to the electromagnetic environment simulation result; front door protection design and rear door protection design are carried out on the equipment level, and comprehensive radio frequency management is carried out on the system level; and carrying out equipment electromagnetic compatibility test verification and full-system electromagnetic compatibility test verification, and finally ensuring compatible work of the unmanned aerial vehicle and the electronic warfare load. The invention provides a top-down strong electromagnetic protection design method for solving the electromagnetic compatibility problem caused by strong electromagnetic interference task loads such as a communication electronic warfare system and a radar electronic warfare system carried by the unmanned aerial vehicle, and the electromagnetic compatibility of the system is improved.

Techniques for measuring single synaptic signals under varying experimental conditions include controlling a video recording microscope to capture, at multiple different times, a first imaged area in a sample holder as a video frame when the sample holder is disposed on a stage and holds a sample of neuronal tissue combined with at least one fluorophore that emits a corresponding electromagnetic wavelength in a synapse during synaptic activity. At least one synaptic region of interest is determined based on a group of pixels in the first imaged area that record electromagnetic emissions from the fluorophore at the different times. An ordered time series of emission intensity is recorded in each of the synaptic region of interest. Peak emission intensity values in the time series are corrected for transmitter label transients. The ordered time series with corrected peak emission intensity values are stored in a data structure with a standard format.

The invention describes an unattended surveillance node and a method for identifying signal-emitting intruders across multiple physical domains. The system uses a hierarchical triggering architecture where mechanical disturbance sensors (acoustic and seismic) operate as low-power logic triggers. Upon detecting a mechanical signature matching an intrusion profile, the system activates a wide-spectrum radio frequency (RF) analysis. The key innovation lies in a correlational fusion engine that validates the intrusion only if there is a rhythmic or spectral match between the mechanical pressure fluctuations and the detected electromagnetic emissions, allowing the classification of the source (biological, mechanical, or electronic) with high immunity to environmental false alarms.

The invention relates to a multi-source electromagnetic matrix aircraft take-off and landing system and a waste heat utilization and building integration method thereof, and belongs to the technical field of aircraft take-off and landing. The system comprises at least three electromagnetic emission units which are arranged in a space array, and each electromagnetic emission unit comprises an independent controllable excitation coil; the central controller is used for independently adjusting current parameters of each electromagnetic emission unit; the at least three electromagnetic emission units act together to form at least four independent and controllable electromagnetic stress action points in a predetermined space area. The system comprises a building facade integration system, a waste heat recovery system and a military application system (space debris cleaning and aerospace vehicle launching). The system has the multiple advantages of high control dimension, high magnetic field intensity, low cost, mobility, building embeddability, comprehensive energy utilization, military and civilian dual-purpose, military defense value and the like, and can be used as a general take-off and landing infrastructure in the fields of urban air traffic, military aviation, spaceflight launching, military defense and the like.

A flexible conductive assembly includes a flexible shielded high-current circuit having first and second circuit portions, each with conductive layers and an electromagnetic shield. Contacts are mechanically and electrically coupled to the conductive layers and extend into a connector housing. The housing incorporates electromagnetic shield portions electrically joined to the circuit shields, and a wire seal that protects against environmental ingress while maintaining electrical isolation. By combining flat conductor layers, integrated shielding, and sealed connector structures, the assembly provides a compact, lightweight, and reliable flexible shielded circuit for transmitting high currents with reduced electromagnetic emissions.

The invention relates to a system, method, device and equipment for detecting an end tool of a surgical robot. The normal use of the end tool and the recognition accuracy of an installation state can be considered. The system comprises a surgical trolley, a mechanical arm, a tail end tool, an electromagnetic emission source, a first magnetic beacon, a second magnetic beacon and a controller. The controller is used for: a controller; detection of the pose relationship between an electromagnetic emission source and a first magnetic beacon, detection of the actual pose relationship between the electromagnetic emission source and a second magnetic beacon, obtaining of the pose relationship between a mechanical arm and the first magnetic beacon determined according to a calibration relationship, and the pose relationship between the second magnetic beacon and the mechanical arm when an end tool is correctly installed, and the position according to the pose relationship and the position and calculating the theoretical pose relationship between the electromagnetic emission source and the second magnetic beacon according to the pose relationship, and obtaining the installation state of the end tool according to the actual pose relationship and the theoretical pose relationship.

The invention belongs to the technical field of electromagnetic emission, and particularly relates to a bird body emission and separation device applied to a multistage electromagnetic coil. According to the technical scheme, the bird body launching and separating device applied to the multi-stage electromagnetic coil comprises an acceleration part gun barrel, a braking part gun barrel, a speed buffering part gun barrel, an impact-buffering structure and a magnetic induction cartridge case, and the acceleration part gun barrel, the braking part gun barrel and the speed buffering part gun barrel are sequentially connected together through flanges to form an integral gun barrel; the impact-buffering structure is installed at the end of the gun barrel of the speed buffering part, and the bird body is installed in the magnetic induction cartridge case and is launched and separated through the whole gun barrel. According to the bird body launching and separating device applied to the multistage electromagnetic coil, high-speed stable launching of the bird body can be achieved, and the bird body is safely separated from the sabot.

The invention relates to an electromagnetic driving device based on a staggered sheet structure spiral stepping motor, and belongs to the technical field of portable electromagnetic emitters. The shell, the motor stator and the emission structure are sequentially arranged from outside to inside, one end of the emission structure is provided with the head structure, and the shell and the motor stator jointly serve as a single-section pipeline of the electromagnetic driving device. According to the invention, the hybrid spiral stepping motor with the staggered sheet structure is creatively improved and is applied to the portable electromagnetic emitter; the spiral motor can enable the launching structure to rotate, the launching structure can carry objects such as a fire extinguishing device, and the shooting precision and distance are improved through rotation to improve the fire extinguishing efficiency.

A multi-modal combustion interruption system comprises a detection subsystem configured to identify combustion events, an electromagnetic emission subsystem having pulsed energy source and directional emission structure, a control processor implementing adaptive modulation based on measured combustion response, and a safety enforcement subsystem configured to control emission activation based on presence detection. The system may be configured in various modes from baseline electromagnetic emission through enhanced configurations incorporating optional ionization enhancement, particle generation, and acoustic energy subsystems. Adaptive modulation enables parameter selection based on measured combustion response rather than predetermined values. The modular architecture enables configuration selection based on deployment type and application requirements. Fixed installations may utilize grid power for industrial facility protection. Mobile platforms may employ onboard power for emergency response or wildfire intervention. Configuration selection may consider environmental compatibility including omission of particle generation for water-sensitive equipment environments or incorporation of multiple enhancement subsystems for demanding applications.

The invention discloses an electromagnetic anomaly detection method based on tensor shrinkage and orthogonal basis function decomposition, and belongs to the technical field of magnetic detection and correction, and the method comprises the steps: enabling a metal target to be equivalent to a magnetic dipole, and building an AC radiation field model; then, deducing a magnetic gradient tensor of a metal target scattered field; next, taking the square of the reduced tensor of the scattering field as a detection quantity, and calculating a primary function of mutual orthogonality of the detection quantity; and finally, establishing an energy function to complete electromagnetic anomaly detection of the metal target. According to the invention, the non-ferromagnetic metal target in the space can be effectively detected based on the electromagnetic emission source, the signal-to-noise ratio of electromagnetic anomaly detection is improved, and the method is of great significance to detection of metal anomalous objects in anti-submarine, anti-mine, anti-landmine and other scenes.

The invention belongs to the technical field of marine electromagnetic geophysical prospecting, and relates to a design method of a marine electromagnetic method multi-waveform combined transmitting circuit, the transmitting circuit comprises a transmitting bridge arm, a resonance branch, an absorption branch and a transmitting coil, direct-current voltage provided by a direct-current power supply E can be inverted and converted into alternating-current voltage, and the alternating-current voltage is loaded at the two ends of the transmitting coil; therefore, alternating current is excited in the transmitting coil, and a primary detection electromagnetic field is formed in a detection area. The circuit is wide in detection range and high in efficiency; an all-solid-state IGBT switch structure is adopted, multi-waveform combined emission is achieved under the condition of a more compact structure and fewer switching devices, higher switching efficiency and smaller system size are achieved, and the multi-waveform combined emission device is more suitable for an electromagnetic emission system instrument in a seabed high-pressure complex environment; the invention provides a topological structure of a multi-waveform combination transmitting circuit, constructs a waveform combination generation principle of a half-sine wave and a triangular wave, establishes a second-order RLC equivalent circuit model, and provides a control signal working time sequence of the transmitting circuit.

The invention provides an apparatus, apparatus and method for simultaneous imaging in charged particle microscopy. The method further includes directing, by the charged particle beam source, the charged particle beam toward the target, wherein interaction of the charged particle beam with the target generates a charged particle emission and an electromagnetic emission. The method further includes receiving, by a membrane detector, charged particle emissions and electromagnetic emissions, wherein the membrane detector at least partially absorbs a portion of the charged particle emissions and is at least partially transparent to the electromagnetic emissions. The method further includes outputting, by the membrane detector, charged particle signal data based at least in part on the portion of the charged particle emissions received by the membrane detector. The method further includes outputting, by the electromagnetic emission detector, electromagnetic signal data based at least in part on the electromagnetic emission through the membrane detector.

The application discloses an electromagnetic emission armature recycler for a tokamak device. The recycler comprises a vacuum exhaust port, an armature inlet track, an armature recovery cavity, an armature transmission track, a spiral conveying rod, a driving motor, a recovery sand storage tank and a plurality of sealing devices. The vacuum exhaust port discharges air in the electromagnetic emission armature recycler. The sealing devices are arranged at each connection. One end of the armature inlet track is connected with the tokamak device to receive the armature, and the other end is connected with the armature recovery cavity. The armature recovery cavity is filled with buffer sand. One end of the armature transmission track is connected with the lower part of the armature recovery cavity, and the spiral conveying rod is arranged in the armature transmission track. One end of the spiral conveying rod is connected with the armature motor and rotates along with the driving motor to drive the mixed armature and buffer sand to move along the armature transmission track. The recovery sand storage tank is connected with the lower part of the other end of the armature transmission track to recover the armature and buffer sand. The armature can be efficiently recovered in a vacuum environment.

This invention belongs to the technical field of electromagnetic emission systems based on electric sources, specifically an electromagnetic emission system based on an adaptive resonant matching structure. The system includes: an adaptive resonant matching structure connected in series with a current source, the adaptive resonant matching structure including an adaptive resonant matching unit, and the adaptive resonant matching unit including an inductor L. C and resistance r L After being connected in series, it is connected in parallel with capacitor C, and in the inductor L C and resistance r L The first switch is set on the branch in series, and in the inductor L C and resistance r L After being connected in series with capacitor C, a second switch is set up. By changing the frequency of the first switch, the overall equivalent capacitance of the adaptive resonant matching unit is reduced. The transmitting system of this invention, employing an adaptive resonant matching structure, can adjust the equivalent capacitance within a certain range to adapt to the corresponding current input frequency.

The invention belongs to the technical field of electromagnetic emission, and particularly relates to an electromagnetic driving coil with a pre-embedded wiring terminal and a manufacturing method of the electromagnetic driving coil. In order to conveniently connect the electromagnetic driving coil with a cable, the invention provides an electromagnetic driving coil with pre-embedded wiring terminals, which comprises a winding frame, a wire wound on the winding frame to form an electromagnetic coil, a package and two wiring terminals, each wiring terminal comprises a base at least partially embedded in the package and a clamping assembly located outside the package and electrically connected with the base, the parts, embedded in the package, of the bases of the two wiring terminals are electrically connected with the two ends of the wire respectively, and the clamping assemblies of the two wiring terminals are used for clamping an inner core and an outer core of the coaxial cable respectively; and the electromagnetic coil is electrically connected with the coaxial cable. The invention further provides a manufacturing method of the electromagnetic drive coil. And the coaxial cable is electrically connected with the electromagnetic coil through the wiring terminal, so that the operation is convenient.

The invention relates to a method for quickly acquiring dynamic mechanical properties of a surface layer of an electromagnetic launching track. Belongs to the technical field of electromagnetic track launching. The armature material spraying layer is prepared on the electromagnetic track material through electric arc spraying, interface diffusion of the track and the armature material is promoted through electric pulse treatment, the internal structure and performance of the spraying layer are regulated and controlled through heat treatment, and finally a reconstructed sample piece with the size meeting dynamic mechanical property test research is obtained. And during electric treatment, current flows through the electromagnetic track material from the armature material spraying layer. According to the method, a large number of reliable samples can be obtained in an extremely short time, and necessary conditions are provided for optimization of electromagnetic emission armatures and track materials and scientific and effective evaluation of electromagnetic emission life.

The invention discloses a high-precision correction method for a bird body electromagnetic emission simulation model based on sensitivity influence sorting. The method comprises the following steps: obtaining structure parameters and material parameters of a gun barrel, an emission assembly and a driving coil in a bird body electromagnetic emission system driven by a multistage coil, and electrical parameters of an external excitation circuit; according to the obtained structure parameters, material parameters and electrical parameters, establishing a bird body electromagnetic emission simulation model driven by the multistage coil; aiming at the driving coil, establishing an external excitation circuit of a corresponding current source series current control switch; according to the bird body electromagnetic emission simulation model driven by the multistage coil, simulation solution of the emission speed, the displacement and the emission efficiency of the bird body is realized; based on a Workbench platform, a bird body launching performance sensitivity analysis system is built, and sensitivity analysis is carried out; and according to the obtained sensitivity analysis result, performing multi-level model correction based on a bird body electromagnetic emission simulation model under the driving of a multi-level coil to obtain an optimal design variable value.

The invention provides an on-off detection circuit for an electromagnetic emission loop, and belongs to the technical field of electromagnetic emission, the on-off detection circuit comprises a power supply, a first isolation switch, a second isolation switch, a third isolation switch, a first resistor, a second resistor, a first detection switch and a second detection switch; the first isolating switch controls the working state of the power supply; the power supply provides working voltage and current for the first detection switch and the second detection switch; when the signal sent by the first detection switch is 1, the power supply works normally, and when the signal sent by the first detection switch is 0, the power supply works abnormally; when the signal sent by the second detection switch is 1, the electromagnetic emission loop is in an on state, and when the signal sent by the second detection switch is 0, the electromagnetic emission loop is in an off state; the second isolation switch is disconnected with the positive electrode of the electromagnetic emission loop; the third isolation switch is disconnected with the negative electrode of the electromagnetic emission loop. The circuit is simple in structure, stable in performance and capable of overcoming high-voltage interference of an electromagnetic emission loop.

This application discloses a device and method for three-dimensional imaging of the composition and hardness of electromagnetic orbital deposits, including a detection host and a detection probe. The detection host triggers the laser and performs optical tomography (LIBS) data analysis outside the electromagnetic orbital chamber. It is equipped with a scanning path control system to achieve two-dimensional planar scanning of the deposited layer on the electromagnetic orbital surface. An automatic focusing control system not only scans the depth direction of the deposited layer on the electromagnetic orbital surface but also detects and corrects the levelness of the pulsed laser output end face of the detection probe relative to the area near the current scanning point on the electromagnetic orbital deposited layer surface, and automatically focuses the fiber optic output lens group in the detection probe relative to the bottom of the ablation pit at the current scanning point. Under the control of the detection host, the detection probe enters the electromagnetic orbital chamber to acquire optical tomography (LIBS) data in real time, in situ, non-destructively, and rapidly.

A system can produce localized spacetime distortions, gravitational waves, sudden transitions in the index of refraction and optical path length changes via high-energy plasma formation. The system includes a high-energy spark-gap arrangement, where an electrical discharge between tungsten tips produces extremely high energy densities in a localized region. The system is tunable and can be driven by either constant or time-varying voltage sources, allowing for different distortion profiles and electromagnetic emission patterns. The system can operate in various environments, including air, inert gases such as helium, and even in vacuum conditions. Multiple spark-gap assemblies can be arranged to create customized distortion shapes and enhanced field effects.

Methods, systems, and devices for an adjustable periodicity of burst access operations are described. Generally, the described techniques relate to mitigating electromagnetic emissions associated with issuing access commands by adjusting a periodicity according to which the access commands are issued. For example, a first set of one or more commands to perform a first type of access operation may be issued according to a first time delay and a second set of one or more commands to perform the first type of access operation may be issued according to a second time delay, which may be different or the same as the first time delay. The second time delay may be (e.g., randomly) determined based on a value that is selected by a device that issues the commands, the value associated with modifying a periodicity according to which commands to perform the first type of access operation are issued.

The invention relates to the field of in-well electromagnetic geophysical exploration, in particular to an in-well fluid multi-scale polar distance electromagnetic emission system, which comprises a carrier plate made of a solid buoyancy material; the pull rope is arranged above the carrier plate; the first transmitting electrode is arranged below the carrier plate at a fixed distance and can be connected to a first end of an electromagnetic transmitter through a first wire; and the second emission electrode is arranged below the carrier plate at a variable specified distance and can be connected to the second end of the electromagnetic emitter through a second electric wire. The electromagnetic emission system disclosed by the invention is automatically adjusted along with the change of the water level of the underground fluid based on the buoyancy effect of the carrier plate, so that the problem of multi-scale electromagnetic emission in the high-reliability underground fluid is solved, and the intensity of electromagnetic signals directly emitted in the underground fluid is greatly improved; and a basic guarantee is provided for the quality of original data acquired by an inter-well and well-ground electromagnetic method. The invention further provides a using method of the in-well fluid multi-scale polar distance electromagnetic emission system.