157 results about "Degaussing" patented technology

The invention relates to the technical field of electromagnetic relay control, in particular to an electromagnetic relay control system, which comprises a relay execution unit, a contact state monitoring unit and an intelligent viscosity elimination control unit, and is characterized in that the contact state monitoring unit acquires quantum tunneling effect impedance spectroscopy and acoustic emission energy entropy change signals in real time; the intelligent viscosity-eliminating control unit analyzes signals through a fusion welding risk multi-dimensional evaluator, triggers a three-stage control sequence, firstly starts a magnetostriction high-frequency oscillator to inject an inverted eddy current array, activates a hysteresis loop restorer to apply a gradient demagnetization potential field if the fusion welding risk multi-dimensional evaluator is not recovered, and finally, recovers the fusion welding risk multi-dimensional evaluator; when an acoustic emission signal is abnormal, a chaotic encryption message is generated through the fault feature topology generator and is linked with the magnetic solitary wave breaking device, ultrasonic frequency mechanical energy can be captured and converted into regenerative current, an adhesion evolution path is reconstructed after diagnosis, the problems of contact adhesion risk identification lagging and lack of multi-physics field cooperative control in the prior art are solved, and the reliability of the contact adhesion risk identification is improved. And the adhesion early warning success rate and the removal efficiency are improved.

Magnetic coupling devices are disclosed having magnetic field sensors. The magnetic coupling device may include degaussing coils wrapped about pole extension shoes of the magnetic coupling device.

The present invention discloses a demagnetization method based on a weak magnetic environment. A three-axis geomagnetic compensation coil is built outside a passive shielding device. Current is injected into the coil to generate a reverse magnetic field to offset the geomagnetism, thereby providing a weak magnetic environment for the shielding device. Based on the weak magnetic environment, a demagnetization power supply control system and a demagnetization coil are used to demagnetize the passive shielding layer of the magnetic shielding device, thereby further improving the demagnetization performance. This method can not only reduce the cost of using high-performance shielding materials when the magnetic shielding device adopts multi-layer shielding, but also effectively reduce the residual magnetism inside the shielding space, thereby constructing an extremely weak magnetic environment.

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 a method for dynamically eliminating residual magnetism of an iron core of a converter transformer, and belongs to the field of transformer demagnetization. According to the method, a capacitance energy storage and release device is connected to the two ends of a transformer winding, capacitance energy storage causes RLC oscillation of the transformer, a magnetic field is generated through current caused by the RLC oscillation, and magnetic domains of iron core ferromagnetic materials are rearranged through the changed magnetic field, so that the demagnetization effect on residual magnetism of the transformer is achieved. The method comprises the following steps: drawing a hysteresis loop in the demagnetization process of a transformer by collecting voltage and current data in the demagnetization process, translating an end point of the hysteresis loop to an original point, and judging the residual magnetism direction and size of initial demagnetization according to the area of each quadrant of the hysteresis loop; and then transformer demagnetization is carried out again, the residual magnetism direction and size of the first demagnetization are evaluated according to the hysteresis loop of the second demagnetization, and whether the residual magnetism is smaller than a threshold value is judged. According to the method, the direction and size of residual magnetism in the demagnetization process can be evaluated in real time, the demagnetization energy is dynamically adjusted, and sufficient demagnetization of the converter transformer is ensured.

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 utility model discloses a fixing device for measuring the diameter of a broken industrial bar, which relates to the technical field of material tensile property testing, and comprises a magnetizing mechanism and a magnetic attraction base of a magnetizer, a cylindrical cavity for the magnetizing mechanism to be installed is arranged in the magnetic attraction base, a dovetail groove is arranged at the top of the magnetic attraction base, and the dovetail groove is arranged in the cylindrical cavity. The magnetizing mechanism comprises a magnetic bar and a variable magnetic core, the magnetic bar is rotationally arranged in the variable magnetic core, the variable magnetic core is provided with a pair of arc-shaped magnetic conductive sheets and a pair of non-magnetic conductive partition plates which are oppositely arranged, and the magnetic bar rotates to enable two poles of the magnetic bar to be in contact with the two arc-shaped magnetic conductive sheets respectively, so that the variable magnetic core is switched to be in a magnetizing state capable of magnetizing the magnetic attraction base; the magnetic bar rotates to enable the two poles of the magnetic bar to be in contact with the same arc-shaped magnetic conductive sheet, so that the variable magnetic core is switched to be in a demagnetization state in which the magnetic attraction base cannot be magnetized, and therefore, the bar can be conveniently taken and placed, and the bar can be conveniently positioned when section matching and diameter measurement are carried out.

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.

The invention relates to an intelligent magnetic shielding barrel in the field of magnetic field shielding equipment, which is characterized in that a plurality of layers of shielding barrels are demagnetized synchronously through a demagnetizing coil which is arranged in the magnetic shielding barrel and is wound on the plurality of layers of shielding barrels, and the plurality of layers of shielding barrels are demagnetized synchronously through a hinge with an electric bolt, a bolt button and a demagnetizing button. Rapid sealing and locking and one-key demagnetization of the magnetic shielding barrel are achieved, operation is convenient, misoperation of personnel is reduced, an operator is reminded of the current state of the magnetic shielding barrel through a state indicating plate, and the misoperation possibility is further reduced; in addition, the current sensor is used for monitoring the current flowing through the degaussing coil in real time, faults such as short circuit or electric leakage can be found in time, and the operation safety is further improved; besides, through the magnetometer which is arranged in the shielding tube and can extend out, the residual magnetic field intensity after demagnetization is detected, and the demagnetization operation of increasing the power step by step is carried out for multiple times according to needs, so that the automatic demagnetization operation is realized.

The invention provides a transformer direct-current magnetic bias feedback device, a converter and a method, the transformer direct-current magnetic bias feedback device is applied to the converter, a transformer in the converter comprises a magnetic core, the transformer direct-current magnetic bias feedback device comprises a magnetic bias detection module, and the magnetic bias detection module comprises an auxiliary magnetic circuit, a current detection unit and a signal processing module. The auxiliary magnetic circuit comprises an auxiliary magnet and a short-circuited auxiliary winding, the auxiliary winding is wound on the auxiliary magnet, and the auxiliary magnetic circuit is arranged on the surface or the edge of the magnetic core; the current detection unit is connected with the auxiliary winding and is configured to obtain degaussing current flowing through the auxiliary winding; and the signal processing module is connected with the current detection unit and is configured to obtain a direct current magnetic bias value of the transformer based on the degaussing current. By applying the device provided by the invention, the hardware volume can be saved, and the detection cost of the direct current magnetic bias of the related transformer can be effectively reduced while the magnetic bias value of the transformer can be effectively detected.

The embodiment of the invention provides a degaussing device and degaussing method for a Hall current sensor, and the degaussing device comprises a reference sensor and a signal processing unit. When a magnetic field signal corresponding to a primary side current flowing through a primary side current row and collected by a reference sensor is zero and a Hall chip detects that the magnetic flux of a magnetic core piece is non-zero, the signal processing unit sends the magnetic field signal to the primary side current row, and the magnetic field signal corresponds to the primary side current flowing through the primary side current row. And generating a degaussing signal of which the amplitude is decreased progressively and the directions are alternated positively and negatively, and applying the degaussing signal to the primary side current bar, so that the hysteresis magnetic field of the magnetic core piece is gradually reduced to zero to realize degaussing. Compared with demagnetization related technologies adopting heating demagnetization or applying a reverse magnetic field and the like, the demagnetization device has the advantages of simple structure, convenience in operation, good demagnetization effect and the like.

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.

Embodiments of the present disclosure provide a demagnetization device and a demagnetization method for a Hall current sensor. The demagnetization device includes a reference sensor and a signal processing unit. When the magnetic field signal corresponding to the primary current flowing through the primary current bus collected by the reference sensor is zero and the magnetic flux of the magnetic core component detected by the Hall chip is non-zero under the condition that the primary current bus is powered off, the signal processing unit generates a demagnetization signal with a decreasing amplitude and alternating positive and negative directions and applies the demagnetization signal to the primary current bus, so that the hysteresis magnetic field of the magnetic core component gradually decreases until it becomes zero to achieve demagnetization. Compared with related demagnetization technologies such as heating demagnetization or applying a reverse magnetic field, it has the advantages of simple structure, convenient operation, and good demagnetization effect.

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 invention belongs to the technical field of generator residual magnetic field demagnetization, and relates to a power generation control method and system.The power generation control method comprises the steps that the steam flow, the steam pressure and the steam turbine efficiency acting on a steam turbine are obtained, and a steam turbine parameter set is formed; acquiring a voltage value, a current phase and a rotor magnetic field intensity of generator power generation monitored in real time, and acquiring a change value of a generator magnetic field by taking a timestamp as a mark to form a generator parameter set; judging whether the change value of the generator magnetic field is within a range for maintaining stable output of the power generation system; when the change value of the magnetic field of the generator exceeds 0.8 times of the range for maintaining the stable output of the power generation system, constructing a steam turbine speed regulation model and a generator excitation model; the method has the advantages that through the coupling relation between the mechanical power output by the steam turbine and the voltage corresponding to the reverse current in excitation current adjustment, steam control and excitation current adjustment coordinated control are achieved, and the technical effect that the generator can stably output electric energy is achieved.

The invention provides a self-adaptive parameter optimization degaussing system and method for a miniaturized nuclear magnetic resonance gyroscope, and belongs to the technical field of nuclear magnetic resonance gyroscope degaussing, and the self-adaptive parameter optimization degaussing system comprises a magnetometer, a pair of coils, a computer, a signal generator, a power amplifier, a transformer, a circuit switch, a contact current sensor and an AD module, a degaussing scheme based on an attenuation alternating current magnetic field is set through two working modes of degaussing operation and magnetizing operation, a new degaussing system architecture is used, it is ensured that actual degaussing current information is consistent with expected parameters, on the other hand, degaussing parameter optimization can be automatically carried out by comparing residual magnetism information in a shielding cylinder after each degaussing, and the degaussing efficiency is improved. The time cost is reduced, the demagnetization efficiency is improved, the zero-bias stability of the gyroscope is improved, the demagnetization operation of magnetizing-demagnetization circulation is efficiently realized, the operation is safe and reliable, and the method is suitable for popularization.

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 invention relates to the technical field of geophysical prospecting equipment, in particular to an anti-interference geophysical prospecting magnetic method instrument measuring device which comprises a power source and a magnetic method instrument, a demagnetization cavity is arranged below the magnetic method instrument, and a demagnetization part is arranged in the demagnetization cavity and used for demagnetizing the interior of the used magnetic method instrument. The demagnetizing component comprises a controller, a fixed plate and a plurality of coils, the plurality of coils are arranged on the fixed plate, and the controller is respectively connected with the power supply and the plurality of coils so as to control the coils at different positions to supply power and control the magnitude of current, form magnetic fields with different intensities at different positions and correspondingly offset the magnetism in the magnetic method instrument. According to the invention, targeted demagnetization can be carried out aiming at the magnetic field distribution in the magnetic method instrument.

The invention discloses a distributed winding parameterization design method based on reinforcement learning and particle swarm optimization, and relates to the technical field of ship demagnetization, and the distributed winding parameterization design method based on reinforcement learning and particle swarm optimization mainly comprises the steps: setting reinforcement learning and particle swarm optimization parameters according to an induced magnetic field and winding efficiency; initializing a reinforcement learning state and a Q table, giving a winding combination by using reinforcement learning, performing current optimization on the winding combination by using a PSO algorithm, obtaining an evaluation index and a reward value according to the residual magnetic field, feeding back the reward value to a reinforcement learning model, and updating the Q table; and when the reinforcement learning reaches the maximum round number or the upper and lower residual magnetic fields are within the preset range, the reinforcement learning is terminated, and a final scheme is obtained. By implementing the distributed winding parameterization design method based on reinforcement learning and particle swarm optimization provided by the invention, the position and current of the distributed winding in a degaussing system can be optimized at the same time, and a complex ship structure or dynamic environment change can be effectively coped with.

The invention discloses a decoupling method of a multi-degaussing power supply system, which relates to the technical field of power supply systems and realizes decoupling control among degaussing power supply modules by combining a BP neural network and PID control. Proportion, integral and differential parameters of each PID controller are adjusted in real time through a BP neural network, so that the output current of each degaussing power supply module is converged to a target value, and the degaussing precision and stability of the system are improved; dynamic proportional adjustment and variable speed integration are adopted, and the response speed and the interference immunity of the system are enhanced; the method is suitable for a complex coupling multiple-input-multiple-output system, can effectively improve the synchronism and overall performance of a degaussing system, and is suitable for ship body degaussing requirements in different magnetic field environments.

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 discloses a ship magnetic reduction system and method based on a water surface floating annular coil, relates to the technical field of magnetic reduction, and aims to solve the problems of insufficient ship demagnetization flexibility, demagnetization response lag and low energy utilization efficiency. The method comprises the following steps: acquiring ship water area magnetic field distribution and navigation trajectory information; dividing a measurement area and standardizing magnetic field intensity and navigation speed; performing magnetic field classification by applying a multi-dimensional analysis method to generate labels; marking a magnetic field change trend in a navigation stage; after the judgment result is received, according to the priority and the compensation efficiency threshold value, graded demagnetization is carried out through the floating annular coil, the electromagnetic stealth capacity of the naval vessel can be remarkably improved, manual intervention and energy consumption are reduced, and efficient, intelligent and energy-saving naval vessel magnetic management is achieved.