100 results about "Degaussing" patented technology

The invention discloses a fault signal dual-mode output method of a magnetic latching relay, particularly relates to the technical field of relay control, and is used for solving the problem of low mode switching efficiency caused by an existing physical jumper mechanism. The current mechanical state of the relay is detected by receiving a remote dual-mode switching instruction; applying a driving voltage sequence corresponding to the target mode according to the state; based on the iron core residual magnetism intensity and the dynamic margin of a target mode nominal value, judging and generating a driving enabling or degaussing trigger signal; when a driving enable signal is responded, the lag time difference between the voltage rising edge and the magnetic flux jump starting point is captured in real time, and the eddy current loss characterization quantity is generated by combining the product integration of the current differential and the temperature rise; adjusting the rising slope and the duty ratio of the driving voltage sequence according to the lag time difference and the over-limit condition of the eddy-current loss characterization quantity; and finally, the matching between an execution result and a target mode identifier is verified by controlling a coil current response waveform, and the continuous holding mode and the instantaneous pulse mode are remotely and reliably switched.

The invention relates to the technical field of magnetic shielding, and discloses a self-adaptive active adjustment type magnetic shielding device demagnetization circuit and device, and a control acquisition system, which are used for comparing a residual magnetism state with a preset expected value and generating a control instruction; the energy output identification system is used for outputting an alternating current degaussing signal according to the control instruction to perform degaussing, outputting an excitation pulse signal to perform residual magnetism detection, identifying a zero crossing point of the alternating current degaussing signal and realizing mode switching of degaussing and residual magnetism detection; and the magnetic shielding device is used for demagnetizing under the action of the alternating current demagnetizing signal and feeding back the residual magnetism state of the preset feature point under the action of the excitation pulse signal. The demagnetization is interrupted at the preset feature points in the demagnetization process, the real-time residual magnetism state is collected, and the demagnetization parameter at the next moment is adjusted after the real-time residual magnetism state is compared with the preset residual magnetism expected value, so that the problem of low efficiency due to the fact that the demagnetization parameter needs to be reset after the process is finished is solved, and the demagnetization efficiency and accuracy are greatly improved.

The invention relates to the technical field of magnetic shielding, and provides a demagnetization method and device for a magnetic shielding device, electronic equipment and a readable storage medium, and the method comprises the steps: collecting a feedback circuit signal of a target magnetic shielding device through a voltage and current collection unit; analyzing the feedback circuit signal by using a signal acquisition processor, determining the current degaussing demand of the target magnetic shielding device, and calculating a degaussing pulse parameter matched with the current degaussing demand; a pulse generating unit is used for generating a target pulse with the adjustable pulse width according to the degaussing pulse parameters, the target pulse is a bipolar square wave pulse, and the adjusting interval of the pulse width comprises the millisecond level and the nanosecond level; and utilizing a pulse switching unit to act the target pulse on the target magnetic shielding device, so that the target magnetic shielding device is subjected to magnetic saturation or magnetic fading. According to the technical scheme provided by one or more embodiments of the invention, the average power demand of the degaussing power supply can be reduced, and the degaussing effect can be improved.

The invention provides a pipeline type inrush water magnetic adsorption visual grouting plugging simulation method, which comprises the following steps of: 1, dynamically assembling a modular magnetic rod, sleeving a time sequence functional sleeve, pre-adsorbing a magnetic slurry layer, mounting a long pressure relief pipe with a shunting hole and a rotational flow grouting pipe, and integrally inserting into a pipeline for positioning; 2, high-speed water flow is dispersed through a pressure relief pipe, grouting parameters are dynamically regulated and controlled based on flow state perception, and dynamic balance is maintained through synchronous pressure relief of swirl jet grout; 3, after solidification, scanning through a pressure relief pipe ultrasonic probe, and constructing a three-dimensional density cloud picture to quantitatively evaluate integrity; and 4, the inert film is dissolved by the solvent to activate the lubricating layer, the degaussing coil counteracts the adsorption force, and the hydraulic mechanism axially pulls out the magnetic bar with constant force. The method has the advantages that magnetic flux self-adaption and pressure relief grouting cooperate to solve the flowing water plugging retention problem; high-quality recovery of the magnetic bars is optimized through sequential control; flow state perception and ultrasonic verification double closed loops guarantee the controllability of the plugging quality; the modular fast-assembly architecture supports cross-environment deployment from land karst to a deep sea scene.

The invention relates to the technical field of magnetic shielding spaces, and discloses a wide-range pulse forming circuit and device for a magnetic shielding space, and charging units in a positive pulse forming circuit and a negative pulse forming circuit are used for boosting and charging an energy storage element of a stacked boosting unit in a continuous oscillation mode; the stacked boosting unit is composed of multiple stages of Marx circuit modules and used for achieving parallel charging and series discharging of an energy storage element through switch time sequence control and outputting bipolar rectangular pulses with independently adjustable amplitude and pulse width. The noise reduction and direct current blocking module is used for noise reduction and direct current blocking processing; the magnetic shielding device is used for demagnetizing the magnetic shielding space. By arranging the positive pulse forming circuit and the negative pulse forming circuit which are the same in structure and are independent, and combining the multi-stage Marx circuit module of the stacked boosting unit and the switch time sequence control, the amplitude and the pulse width of the bipolar rectangular pulse are independently adjustable, so that the problem of diversified demagnetization requirements of the magnetic shielding device can be adapted, and the demagnetization efficiency of the magnetic shielding device is improved. And the application range of the circuit is widened.

The invention provides an inspection flow dynamic optimization linkage control method, and the method comprises the steps: dynamically constructing a magnetic field distribution diagram of an operation region through a distributed sensor network; on the basis of the magnetic field distribution diagram, real-time fusion positioning is conducted on double-encoder data of the mechanical arm joint; when the magnetic field intensity at the joint of the mechanical arm exceeds a preset threshold value, linkage suppression of a degaussing coil and a shielding layer is triggered; according to the magnetic field distribution diagram, a motion path for the mechanical arm to avoid a high interference area is planned, and the grabbing motion speed of the mechanical arm is adjusted in a self-adaptive mode; the method comprises the following steps: detecting the grabbing offset of an end effector of the mechanical arm, and re-executing the construction of a magnetic field distribution diagram, linkage suppression and high interference area avoidance optimization in an ultralimit area until the mechanical arm successfully grabs a target or gives an alarm, thereby fundamentally solving the problems of positioning drift and grabbing failure of the mechanical arm caused by a transient high-intensity magnetic field; and the inspection efficiency and the system stability in a complex industrial environment are improved.

Magnetic coupling devices are disclosed having magnetic field sensors. The magnetic coupling device may include a calibration module for calibrating the magnetic coupling devices.

The utility model belongs to the field of powder impurity removal, and particularly relates to wet type demagnetizing equipment. The utility model relates to wet type demagnetizing equipment, which comprises a shell, a demagnetizing device, a demagnetizing device, a demagnetizing device and a demagnetizing device, the upper end cover is attached to the shell on the upper portion; the magnetic rod fixing plate is positioned above the upper end cover and is fixedly connected with a plurality of vertically arranged magnetic rods; the number of the magnetic bar sleeves is equal to that of the magnetic bars, the magnetic bar sleeves are fixed in the cavity of the shell, and the magnetic bars can penetrate through the upper end cover to be inserted into the corresponding magnetic bar sleeves; the slurry inlet, the slurry outlet and the drain outlet are arranged in parallel, the slurry inlet and the slurry outlet are arranged on one side of the shell, and the drain outlet is arranged on the other side of the shell; and the magnetic bar fixing plate drives the magnetic bar to move up and down in the corresponding magnetic bar sleeve through a lifting device. According to the utility model, positive electrode material particles can be dispersed, the magnetic bar is made of a permanent magnet material and does not need to be magnetized and demagnetized, the equipment structure is simplified, and the equipment is small in size, light in weight and wide in application range.

The invention belongs to the technical field of degaussing, and relates to a ship winding degaussing current solving method based on a gradient tensor, which comprises the following steps: acquiring the magnetic gradient tensor of a plane ship when coils are not electrified; respectively performing simulation electrification on the winding coils to obtain the magnetic gradient tensor of the electrified measurement plane; and calculating an efficiency matrix of the magnetic gradient tensor excited by the unit current. The gradient of the geomagnetic field is extremely small, direct detection of the magnetic gradient tensor of the ship and the electrified coil can better reflect the magnetic characteristics of the ship and the coil compared with detection of a magnetic vector, and better resolution is achieved for magnetic field changes caused by magnetic anomalies; under the motion platform, the magnetic gradient tensor is insensitive to the attitude angle error, and more accurate detection data can be obtained; in addition, the gradient tensor is weak in response to time-varying geomagnetic disturbance, and has higher anti-interference capability. Therefore, according to the method, the accuracy of ship magnetic field modeling and degaussing current calculation is improved, and the magnetic stealth performance of a ship facing high-sensitivity magnetic gradient detection equipment is enhanced.

The invention relates to the technical field of data secrecy, and particularly discloses a secrecy medium data destruction device which comprises a pulverizer, a conveyor capable of transporting objects to be demagnetized is arranged on one side of the pulverizer, a degaussing machine is fixedly connected to the upper end of the conveyor, cameras are fixedly connected to the front end and the rear end of the degaussing machine, and the cameras are fixedly connected to the front end and the rear end of the degaussing machine. According to the conveyor, a support is composed of a plate frame, a driving motor is fixedly connected to one side of the support, a sliding groove is formed in the surface of a chain plate, so that a plurality of sets of pressed rods can move downwards after being extruded by magnetic discs, the magnetic discs can shield two-dimensional codes at the ends of the pressed rods, and at the moment, shooting is conducted through a camera in the conveying process; the number of the disk placing chain plate can be recorded, the two-dimensional code which is not blocked can be recorded at the same time, the shape and the position state of the disk can be recorded through a plurality of groups of pressed rods, and if a person carries out packet switching, the position for placing the disk for the second time is inconsistent with the position for placing the disk for the first time, so that an alarm is given.

The utility model discloses a pressure-resistant explosion-proof magnetic liquid level meter, which relates to the technical field of magnetic liquid level meters and comprises a clamping frame, a first measuring tube and a second measuring tube are respectively connected inside the clamping frame, an anti-overflow shell is connected to the top of the first measuring tube and the top of the second measuring tube, and a baffle tube is fixed below the inside of the anti-overflow shell. A pulley is connected to the upper portion in the anti-overflow shell, a high-temperature-resistant pull rope is connected to the top of the pulley, one end of the high-temperature-resistant pull rope is connected with a first hanging shell, a strong magnet is installed in the first hanging shell, and the other end of the high-temperature-resistant pull rope is connected with a second hanging shell. Through the arrangement of the first measuring tube, the second measuring tube, the first hanging shell, the strong magnet, the pulley, the high-temperature-resistant pull rope, the second hanging shell, the cavity and the balancing weight, a medium flows through the first measuring tube, and the second measuring tube measures the liquid level in a linkage mode, so that the strong magnet is separated from the high-temperature medium; the liquid level can be measured, and demagnetization of the strong magnet caused by high temperature is avoided; the use in a high-temperature environment is convenient.

The invention discloses an active and passive combined zero magnetic device and a design method, and belongs to the field of magnetic shielding. The active and passive combined zero magnetic device comprises a passive shielding cabin composed of multiple layers of permalloy, and an equal-interval structure is arranged between every two adjacent layers; provided is a demagnetization system. The permalloy has high magnetic permeability, when a magnetic field encounters the permalloy with high magnetic permeability, magnetic field lines tend to spread along a path with higher magnetic permeability, namely walk along a permalloy layer instead of penetrating through a material, so that the environmental magnetic field is further reduced, a near-zero magnetic field environment is realized by designing a multi-layer permalloy cabin structure, and the performance of the magnetic field is improved. The demagnetizing coil is wound on the inner side wall and the outer side wall of the permalloy cabin body, and the demagnetizing coil is communicated with the external demagnetizing equipment through the demagnetizing interface at the end part of the demagnetizing coil, so that the amplitude of the demagnetizing current is gradually attenuated to the demagnetizing coil, and the permalloy cabin body is demagnetized; and the magnetization intensity of the material caused by the influence of the external environment and irresistible stress in the processing process can be weakened through the demagnetizing coil.

The utility model provides a cesium optical pump magnetometer for aviation magnetic exploration, which relates to the technical field of cesium optical pump magnetometers, and comprises a fuselage, a rotor wing is arranged on the surface of the fuselage, an undercarriage is arranged on the side surface of the fuselage, a battery pack is arranged on the bottom surface of the fuselage, and a connecting ring is fixedly mounted on the surface of the undercarriage. A fixing rod is fixedly installed in the connecting ring, a magnetic detection mechanism is fixedly installed on the bottom face of the machine body, a positioning antenna is arranged, the real-time target positioning and target positioning calibration functions are supported, demagnetization treatment is further conducted according to the working characteristics of a magnetic detector, high-strength carbon fibers, aviation aluminum alloy, current shielding and motor power demagnetization are adopted, and the magnetic detector can be used for detecting the target position. Light-weight high-strength materials of carbon fibers, aeronautical aluminum alloy and lithium polymers are adopted to form independent modules, the overall performance is improved, the overall weight is reduced, flight stability is kept, a high-strength lengthened carbon fiber fixing rod and titanium alloy are adopted to serve as a magnetic sensor support, and stability of the magnetic sensor in aerial operation is guaranteed.

The invention discloses a road bridge expansion joint welding device, which belongs to the technical field of road bridge expansion joint welding and comprises a welding system body and a real-time control system arranged in the welding system body. The real-time control system comprises an arc voltage / current sensor module, a signal conditioning and collecting module, a main controller module, a welding power source interface module, a degaussing coil driving module, a robot servo driving module, a man-machine interaction and monitoring module and an offline calibration data storage module. The output end of the arc voltage / current sensor module is connected to the input end of the signal conditioning and collecting module. According to the method, welding arc signals are collected to recognize magnetic deflection blow, the deflection angle and magnetic field distribution are dynamically calculated, measures such as pulse modulation, active demagnetization or track compensation are adopted for autonomous decision, the incomplete fusion defect caused by residual magnetism is eliminated, the anchoring welding quality is ensured, and early brittle failure and failure caused by hidden danger welding spots are avoided.

The invention relates to the technical field of magnetic materials, in particular to a waste magnetic material recycling system which comprises a fixed column fixedly installed between two supports, the outer side of the fixed column is fixedly sleeved with a supporting block, and the outer side of the fixed column is rotationally sleeved with a rotating frame. And a first high-temperature-resistant net cylinder and a second high-temperature-resistant net cylinder are rotationally mounted on the inner side of the rotating frame. According to the magnetic waste demagnetizing device, through the arrangement of the first high-temperature-resistant net barrel and the second high-temperature-resistant net barrel, magnetic waste in the first high-temperature-resistant net barrel can be demagnetized through fire spraying of a fire spraying head, and the positions of the first high-temperature-resistant net barrel and the second high-temperature-resistant net barrel are changed by pulling a connecting rod; the magnetic material waste in the second high-temperature-resistant net barrel can be subjected to flaming demagnetization, and the demagnetized magnetic material waste in the first high-temperature-resistant net barrel is cleaned by spraying water through the water spraying head, so that the magnetic material waste can be subjected to demagnetization and cleaning alternately.

The invention provides a partitioned magnetron and coating equipment, and belongs to the technical field of semiconductor production equipment.The partitioned magnetron comprises a plurality of magnetic poles and an insulation structure, a first spacer region is arranged between every two adjacent magnetic poles, each magnetic pole is equally divided into a plurality of magnetic blocks, and a second spacer region is arranged between every two adjacent magnetic blocks; and the insulating structure is arranged in the first spacer region and the second spacer region. A first interval area is arranged between every two adjacent magnetic poles, the same magnetic pole is also internally divided into the magnetic blocks which are distributed at intervals, the insulating structures are used for performing separation and insulation, so that the magnetic blocks have good insulativity, when the magnetron performs high-speed scanning, due to the fact that the size of a single magnetic block is small, only tiny vortex current can be generated, and the magnetic blocks can be separated and insulated at intervals. The magnetic pole can be effectively prevented from generating high temperature, so that the demagnetization condition is avoided, and the utilization rate of the target material and the uniformity of a corrosion area on the target material can be improved.

The invention belongs to the technical field of magnetic material degaussing, and particularly relates to a degaussing device with degaussing coils distributed diagonally, comprising a magnetic shielding box which is of a regular hexahedron structure and is provided with six winding surfaces and twelve ridges; the degaussing coil is wound inside and outside the magnetic shielding box, and the magnetic shielding box divides the degaussing coil into a plurality of degaussing sections; the degaussing sections arranged on the inner side and the outer side of the same winding surface are symmetrical; and the degaussing sections on the two sides of the same ridge are symmetrical. According to the degaussing coil structure, the distribution directions of the coils on any two adjacent winding surfaces are inconsistent. The magnetic circuit generated on each plane and the direction of the demagnetization induction intensity can be staggered, the situation that the demagnetization effect is reduced due to the influence of the magnetic circuits on the adjacent faces is avoided, meanwhile, each coil can surround all the planes of the magnetic shielding box through the coil surrounding mode, and all the planes of the magnetic shielding box can be demagnetized at the same time.

This utility model discloses an anti-sticking electromagnetic suction head device, relating to the field of magnetic suction handling technology. Specifically, it includes a lifting plate, an electromagnet, and a side plate. The electromagnet is slidably connected to the lifting plate, with its side away from the lifting plate serving as the suction surface. The side plate is connected to the lifting plate and extends towards the electromagnet. When the electromagnet moves towards the lifting plate, its suction surface can move to a position between the end face of the side plate and the lifting plate, allowing the workpiece to be detached from the electromagnet's suction surface through the end face of the side plate. The electromagnet attracts and transports the workpiece. When the electromagnet is demagnetized, and its remaining magnetic force still attracts, the electromagnet retracts inward, causing the side plate to contact the workpiece on the electromagnet's suction surface, thus detaching the workpiece from the electromagnet's suction surface and preventing secondary attraction of the workpiece.

The invention discloses a device and method for rapidly reducing residual magnetism, and relates to the technical field of demagnetization of power equipment, and the device comprises a transformer which is provided with a high-voltage side winding terminal and a neutral point leading-out terminal; a DC resistance measuring device; when direct current resistance testing is carried out on all gears of the transformer, the positive terminal of the direct current resistance measuring device is sequentially connected with the corresponding high-voltage side winding terminals, and the negative terminal of the direct current resistance measuring device is connected with the neutral point leading-out terminal. And after the DC resistance test of each gear of the transformer is completed, the negative terminal of the DC resistance measuring device is sequentially connected with the corresponding high-voltage side winding terminal, and the positive terminal of the DC resistance measuring device is connected with the neutral point leading-out terminal. After the direct-current resistance test of the voltage winding, the direct-current resistance test is carried out on the transformer in the reverse direction, a magnetic field in an iron core of the transformer is counteracted, residual magnetism in the transformer is reduced, and the influence of excitation inrush current on a power supply system is reduced.

The invention relates to an electromagnetic induction type water flow detection method and system, a terminal and a storage medium, and relates to the technical field of water flow detection, and the method comprises the steps: obtaining historical water flow data of a preset to-be-detected region; analyzing the historical water flow data to determine a basic coil parameter, a redundant coil parameter and a basic maximum flow rate; arranging a preset electromagnetic induction coil according to the basic coil parameter and the redundant coil parameter to determine a basic coil and a redundant coil, and starting a preset demagnetization circuit to demagnetize the redundant coil; obtaining a basic electromotive force; analyzing the basic electromotive force and the basic coil parameters to determine basic liquid data; and analyzing the basic maximum flow velocity, the basic liquid data, the basic coil parameters and the redundant coil parameters to control a degaussing circuit and a redundant coil to determine final liquid data. The method has the effect of improving the water flow detection precision.

This invention discloses a method and apparatus for detecting and demagnetizing residual magnetism in the core of an electromagnetic current transformer, comprising: acquiring current and voltage signals; performing harmonic analysis on the current signal; performing integration processing on the voltage signal; performing phase decomposition on the even-order harmonic components based on the fundamental phase of the magnetic flux to extract the residual magnetism-related components; determining the normalized residual magnetism index based on the residual magnetism-related components and the odd-order harmonic components; using a controllable current source connected in parallel with the secondary circuit of the electromagnetic current transformer; and adjusting the polarity and amplitude of the controllable DC component using the normalized residual magnetism index as a closed-loop feedback signal to make the normalized residual magnetism index approach zero. This invention can detect the presence and level of residual magnetism in the core online without shutting down the electromagnetic current transformer or interrupting its metering and protection functions, and automatically implement closed-loop active demagnetization when the detected residual magnetism exceeds a safety threshold, restoring the core to a symmetrical magnetization working state without residual magnetism.

The application discloses an electromagnetic chuck driving and protection circuit and method based on an H-bridge, and belongs to the technical field of electromagnetic chucks. The circuit comprises an H-bridge driving unit, a first energy storage unit, a second energy storage unit, a discharge unit, a voltage detection unit, a current detection unit and a control unit. The H-bridge structure is combined with IGBT switching tubes to realize positive and negative excitation and demagnetization control of the electromagnetic chuck, the first capacitor is used for storing and releasing the reverse demagnetization energy, and a double protection mechanism is used to effectively inhibit the kilovolt-level reverse electromotive force generated when power is cut off. The application has the advantages of fast response speed, long service life, high safety, low energy consumption and the like, solves the problems of workpiece release delay and reverse electromotive force hazards caused by the magnetic hysteresis effect of traditional electromagnetic chucks, and is suitable for electromagnetic control applications in the fields of mechanical machining and automatic handling.

The application belongs to the technical field of magnetic material preparation, and relates to an electromagnetic mixing device and a method for mixing magnetic material powder by using the same. The electromagnetic mixing device comprises, from top to bottom, a feeding assembly, an electromagnetic mixing assembly and a demagnetization and screening assembly which are sequentially connected. The feeding assembly comprises a feeding inlet and a feeding pipe which are connected in a top-down manner. The electromagnetic mixing assembly comprises a stirring chamber and an electromagnetic stirrer. The demagnetization and screening assembly comprises a vibrating screen, a coarse particle outlet, a discharge outlet and a vibrating motor. The electromagnetic mixing device and the electromagnetic mixing method can realize more uniform, rapid and efficient mixing of magnetic material powder.

The adjustable and closable electric control permanent magnetic field device comprises a permanent magnet and is characterized in that an electromagnet is fixed on the outer ring of the permanent magnet, a magnet exciting coil is wound on the electromagnet, the permanent magnet is demagnetized firstly, then after the device is transported and installed, a strong pulse power supply is connected to the magnet exciting coil, the permanent magnet is magnetized by the electromagnet, and the permanent magnet is demagnetized by the electromagnet. After magnetizing is completed, a strong pulse power supply is cut off, no current input of the electromagnet is kept, the permanent magnet continuously generates a stable permanent magnetic field, during magnetizing, a constant excitation magnetic field is achieved by outputting constant current, the higher the current is, the higher the magnetic field intensity is, different magnetizing intensities, online magnetizing and demagnetizing are achieved by adjusting different currents, and the higher the magnetizing intensity is achieved by magnetizing through the strong pulse magnetic field. The magnetizing and demagnetizing intensity is adjusted through the magnet exciting coil, the current is adjusted through the magnet exciting coil, then the magnetizing and demagnetizing intensity is adjusted, non-magnetizing transportation and installation are achieved, and transportation equipment and on-site use equipment are not affected.

A RF power generator has a RF power source configured to generate an output signal. A power splitter is configured to receive the output signal and generate a plurality of split signals. A demagnetizing circuit is configured to receive the plurality of split signals. The demagnetizing circuit is configured to include a plurality of inductances corresponding to the plurality of split signals. The plurality of inductances is configured to reduce the effects of mutual impedance of an ICP chamber in series with the plurality of inductances so that a ratio between a pair of the plurality of split signals varies substantially linearly as one of the pair of the plurality of split signals is varied.

A closed-loop current sensor is provided. The under-test current conversion unit inputs an under-test current, and generates an analog signal and a voltage output signal. The first signal conversion unit converts the analog signal into a magnetic flux signal. The second signal conversion unit converts the voltage output signal into a digital voltage output signal. In an open-loop state, the control unit outputs a control signal with a first duty cycle, and controls the current value of the under-test current conversion unit. The voltage output signal is a first reading value, and the analog signal is the residual magnetism value of the under-test current conversion unit. In the open-loop state, the driving circuit generates an alternating current on the coil as well as generates positive and negative currents and magnetic fields with a decreasing peak value on the under-test current conversion unit for degaussing.

A novel and useful solid-state degauss circuit for use with electromagnetic door locks. The door lock circuit is configured to provide a current to the electromagnetic coil load. A pulse width modulation (PWM) controller varies the frequency and / or duty cycle to a switch in series with the coil. An active, solid-state degauss circuit in line with the current flowing through the coil is provided. When triggered either in an uncontrolled or controlled manner, the active degauss circuit composed of a solid-state device, creates a short circuit across the coil after current reversal is achieved thereby degaussing.

The utility model discloses a degaussing cable, which comprises a conductor, an insulating layer, an inner sheath, an outer sheath, connecting pieces and adsorption pieces, the insulating layer is coated outside the conductor, the inner sheath is coated outside the insulating layer, the outer sheath is coated outside the inner sheath, the connecting pieces are arranged outside the outer sheath at intervals along the length direction of the outer sheath, and the adsorption pieces are connected with the connecting pieces. The adsorption part is used for being in adsorption connection with the outer wall of a naval vessel. The conductor is electrified to generate an external reverse magnetic field to the ship, a magnetic field on a metal shell of the ship is reduced or eliminated, the protection performance of the degaussing cable is improved through the inner sheath and the outer sheath, and therefore the resistance of the degaussing cable to the severe ocean environment is improved, meanwhile, the degaussing cable can be directly adsorbed to the outer wall of the ship through the adsorption part, and the service life of the degaussing cable is prolonged. The positioning stability of the degaussing cable is improved, and the degaussing effect is improved.

The application relates to an intelligent magnetic shielding barrel in the field of magnetic field shielding devices. A demagnetizing coil which is built in the magnetic shielding barrel and wound on a multilayer shielding cylinder is used to synchronously demagnetize the multilayer shielding cylinder. A hinge with an electric bolt, a bolt button and a demagnetizing button are used to realize quick sealing, locking and one-key demagnetizing of the magnetic shielding barrel, so that the operation is convenient, personnel misoperation is reduced, and the current state of the magnetic shielding barrel is reminded to the operator through a state indicating board, so that the misoperation possibility is further reduced. In addition, a current sensor is installed to realize real-time monitoring of the current flowing through the demagnetizing coil, so that short circuit or leakage and other faults can be found in time, and the operation safety is further improved. Furthermore, a magnetometer arranged in the shielding pipe and capable of extending out is used to detect the residual magnetic field strength after demagnetization, and multiple demagnetization operations with gradually increased power are carried out according to the requirement, so that automatic demagnetization operation is realized.