1006 results about "Magnetic loop" patented technology

The invention relates to the technical field of magnetic ring detection, discloses a magnetic ring multi-dimensional nondestructive detection system and method based on multi-frequency composite electromagnetic excitation, and solves the defects of existing magnetic ring detection in the aspects of information acquisition, composite excitation and comprehensive diagnosis. The method comprises the following steps: applying multi-frequency composite excitation, and collecting and preprocessing multi-dimensional response; and extracting features, and carrying out deep learning fusion inversion to obtain magnetic characteristics, material components and defect information. The system comprises a composite excitation module, a multi-mode sensing module, a data acquisition preprocessing module, a data fusion inversion module and a control module. By adopting the technical scheme, comprehensive and efficient nondestructive detection of multi-dimensional electromagnetic information of the magnetic ring is realized, the existing limitation is overcome, and the detection precision and the comprehensive diagnosis capability are remarkably improved.

The utility model discloses a brushless servo motor easy to install and debug, which comprises a shell, a rotor, a stator and an encoder assembly, and is characterized in that the rotor comprises a rotating shaft and a magnetic ring; the shell comprises a shell and a first end cover; the stator comprises a stator core and a winding; the magnetic ring is an M-pole magnetic ring; the encoder assembly comprises a PCB and a magnetic induction device, the magnetic induction device comprises N groups of Hall sensors, and N is 1 or 2; each group of Hall sensors comprises two Hall sensors, and one Hall sensor rotates 90 degrees around the center line of the rotating shaft to reach the position of the other Hall sensor; each Hall sensor is eccentrically arranged relative to the center line of the rotating shaft, and a gap is formed between each Hall sensor and the magnetic ring in the axial direction of the rotating shaft. According to the utility model, the Hall sensor directly senses the magnetic field of the magnetic ring of the rotor to determine the angular position of the rotor, an independent sensing magnet does not need to be arranged on the rotor, the structure is simple, and the installation process is simplified.

The invention relates to the technical field of settlement monitoring, in particular to embedded type ground settlement monitoring equipment which comprises a settlement pipe, a magnetic ring and a displacement sensor, four sliding grooves are formed in the outer wall of the settlement pipe at equal intervals, sliding blocks are slidably connected to the inner sides of the four sliding grooves, the magnetic ring is slidably connected to the outer wall of the settlement pipe, and the sliding blocks are fixedly connected to the inner side of the magnetic ring. Through the arrangement of the conical block, the insertion rod, the limiting mechanism, the removing mechanism and other structures, in the monitoring equipment installation process, after the periphery of a sedimentation pipe is backfilled, the insertion rod on the magnetic ring is automatically extruded out and inserted into surrounding backfilled soil, then the limiting rod is pushed out of a sliding groove through the removing mechanism, and the magnetic ring can be installed conveniently. And the sliding positions of the limiting rod and the inserting rod are limited, so that the downward sliding limitation of the magnetic ring is relieved, the displacement sensor moves to the side of the magnetic ring, the magnetic ring is quickly mounted, the difficulty in positioning and fixing in the mounting process of the magnetic ring is avoided, and the mounting efficiency is improved.

The utility model provides a power assembly and a converter. The power assembly comprises a machine-side power module, a network-side power module, a positive direct-current bus conducting bar, a negative direct-current bus conducting bar and a direct-current bus capacitor, the machine side power module is connected with a motor, the network side power module is connected with a power grid, and the positive direct current bus conducting bar and the negative direct current bus conducting bar are connected between the machine side power module and the network side power module. The direct current bus capacitor is arranged between the positive direct current bus conducting bar and the negative direct current bus conducting bar; the power assembly further comprises at least one magnetic ring arranged on the positive direct current bus conducting bar and / or the negative direct current bus conducting bar. According to the power assembly and the converter, through the at least one magnetic ring arranged on the positive direct current bus conducting bar and / or the negative direct current bus conducting bar, the ripple current of the bus capacitor is prevented from being too large, the loss of the bus capacitor is reduced, and the bus capacitor is prevented from being burnt.

The invention relates to the technical field of electric signal data processing, in particular to a cable life prediction method based on working condition movement. The method comprises the following steps of: sleeving a leakage flux ring on the periphery of a cable shielding layer, wherein a Hall array is arranged in the leakage flux ring; an acoustic emission patch is attached to the surface of the shielding layer; a mechanical trigger is arranged at the joint of the cable drag chain; when the mechanical trigger detects a complete bending stroke every time, the Hall array and the acoustic emission patch are started synchronously, and a magnetic flux leakage pulse amplitude value and an ultrasonic elastic wave energy value of the current stroke number are generated; dividing the magnetic flux leakage pulse amplitude value of the same stroke number by the ultrasonic elastic wave energy value to obtain a broken wire coefficient of the stroke number; and accumulating the broken wire coefficients of the continuous stroke numbers of the cable to form a theoretical accumulated broken wire index. According to the invention, through the magnetic flux leakage and acoustic emission monitoring technology and in combination with the accelerated bending test, accurate quantification and life prediction of the broken wire state of the cable are realized, and finally, the reliability of the whole life cycle management of the cable is improved.

The invention relates to the technical field of power cables, and discloses a parallel power cable current sharing optimization method and device based on a magnetic ring current equalizer, and the method comprises the steps: carrying out the simulation of a three-dimensional finite element model, and determining first simulation impedance; obtaining an equivalent circuit model, determining theoretical impedance according to the equivalent circuit model, and determining current impedance according to the theoretical impedance and the first simulation impedance; obtaining an electromagnetic field coupling model, determining a magnetic ring compensation parameter, and simulating the electromagnetic field coupling model according to the magnetic ring compensation parameter and the current impedance to determine an impedance compensation mapping relation; and determining an impedance compensation sensitivity matrix according to the impedance compensation mapping relation, and setting values of magnetic ring compensation parameters so as to perform current sharing optimization on the parallel power cables. According to the invention, the mapping relation between the magnetic ring compensation parameter and impedance compensation of the magnetic ring current equalizer can be quantified, thereby accurately generating an optimal compensation scheme, greatly improving the reliability of the parallel power cable, and facilitating the realization of power transmission safety.

The invention discloses an electric drill motor overload protection device, and relates to the technical field of circuit overload protection, the electric drill motor overload protection device comprises an electric drill main body, the side part of the electric drill main body is provided with a driving module, the electric drill main body is internally provided with an overload assembly, the overload assembly comprises a hard through pipe and an elastic through pipe, and the hard through pipe and the elastic through pipe are internally provided with connecting wires in a penetrating manner; composite connecting pieces are assembled outside the sides, close to each other, of the two connecting rods; the whole composite connecting piece is of a double-layer structure, the inner layer is an electrified contact head used for achieving circuit conduction, the outer layer is an adsorption magnetic ring playing a role in adsorption and fixation, thermal expansion of the heat sensitive piece is a continuous process, but the action of triggering the upper inclined plate to move to disconnect the circuit is completed instantly, and therefore the heat sensitive piece is not damaged. The delayed process of temperature accumulation is converted into the instant action of mechanical triggering, so that the response of the protection device is quicker and more reliable, timely intervention can be performed when the temperature of the motor just exceeds the safety range, and the operation time of the motor at the dangerous temperature is effectively shortened.

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.

The utility model discloses fan dispensing inspection and magnetic ring assembly equipment which comprises a control module and a lower rack, the pushing mechanism, the dispensing mechanism, the visual camera inspection mechanism, the module carrying mechanism, the grabbing and moving mechanism, the tape clip automatic push-out mechanism, the automatic tape winding mechanism, the tape assembling and pressing mechanism, the discharging mechanism and the control module are in circuit connection with the control module. The visual camera inspection mechanism is used for detecting the dispensing condition and feeding back the dispensing condition to the control module, so that the production efficiency is greatly improved and the reject ratio is reduced; the equipment adopts an automatic assembly operation mode, so that the assembly precision is greatly improved, the dynamic balance is very stable, the noise of the cooling fan in the rotating process is reduced, and the service life is also greatly prolonged; by replacing the positioning carriers of the products, the products of various specifications can be compatible at the same time, and the products are convenient and fast to replace and produce; the labor is reduced, the yield is increased, and the product quality is improved.

The utility model discloses an electromagnetic relay and a power utilization device. The electromagnetic relay comprises a static contact assembly provided with a static contact, a movable spring assembly, a first magnetic conductive piece and a second magnetic conductive piece. The movable spring assembly comprises a movable spring body and a movable contact arranged on the movable spring body; one end of the movable spring body is a fixed end, and the other end is a movable end; and the movable contact can be in contact with or separated from the static contact. The first magnetic conducting piece is fixedly connected with the insulating structure and is located in a magnetic field corresponding to the part, used for current circulation, of the movable spring body; the second magnetic conducting piece is fixedly connected to the side, away from the static contact, of the movable spring body, the second magnetic conducting piece and the first magnetic conducting piece are oppositely arranged, and when the movable contact and the static contact are closed and conducted, the first magnetic conducting piece and the second magnetic conducting piece form a closed magnetic loop based on current flowing in the movable spring body and generate electromagnetic attraction force; and the movable contact and the static contact are driven to resist the electric repulsive force and keep a closed conduction state. The relay provided by the embodiment of the utility model has the advantages of excellent short-circuit resistance, low consumption of copper consumables and low cost.

The invention belongs to the technical field of encoder signal processing, and particularly relates to an encoder capable of realizing non-contact rotation through a measurement magnetic ring of a magnetic induction technology and a TMR magnetic induction read head encoder, performing digital signal processing through a DSP under the driving of a high-speed motor, and integrating signal direct-current bias, amplitude phase difference correction and temperature detection through a program. High-precision position feedback is achieved by subdividing and encoding sine and cosine orthogonal signals inductively output by the measuring magnetic ring, the RS485 protocol communication has the advantages of being high in anti-interference capacity and rich in communication protocol, state monitoring information can be obtained while position information is obtained, motor parameters and encoder parameters can be stored in a built-in mode, and high-precision position feedback can be achieved through a driver. The upper computer is used for reading and modifying, operation is convenient, and the application range is wide.

A first seal and a second seal seal an annular space between an outer ring and an inner ring by sandwiching a retainer. A stator including a coil is supported by the first seal and is opposed to a magnetic ring. A sensor, a wireless communication circuit, and a power supply circuit are supported by the second seal. A wire electrically connects the coil and the power supply circuit. The wire includes a part disposed in a groove extending in an axial direction of a bearing on an outer peripheral surface of the outer ring.

The invention discloses a signal high-frequency interference resisting device and method for electrical resistance tomography. A high-frequency filtering unit in the device comprises a magnetic ring, a coaxial shielding line, a first resistor and a second resistor; the coaxial shielding lines are connected between the corresponding detection electrodes and the signal sampling ends, and the first resistors are connected between the first ends of the signal lines in the corresponding coaxial shielding lines and the first ends of the signal lines in the next coaxial shielding lines. The second resistor is connected between the second end of the signal line in the corresponding coaxial shielding line and the second end of the signal line in the next coaxial shielding line; the first end of the signal line in the coaxial shielding line is also connected with the first end of the shielding layer in the next coaxial shielding line; the magnetic rings sleeve the outer layers of all the coaxial shielding wires and are tightly attached to the outer layers of the coaxial shielding wires, filtering on a transmission line is achieved, the twisted-pair coaxial shielding wire magnetic rings are combined to serve as transmission wire harnesses, a hardware coupling filter circuit between the wire harnesses is constructed, the suppression effect of common-mode interference is improved, sampling signals are more real, and imaging is clearer.

According to the multi-ring sensor for transformer substation partial discharge detection and positioning and the positioning method, a multi-ring sensor structure is formed by arranging a first magnetic ring and a second magnetic ring which are embedded with each other, are vertically placed and form an included angle of 90 degrees, and whether a discharge source exists or not is judged by measuring the induced voltage of the sensor; a measurement azimuth angle and a calculation result azimuth angle are obtained according to a positioning formula calculation result of a plurality of multi-ring sensors, the specific position of the area where the discharge source is located is obtained, re-confirmation is conducted by checking whether discharge equipment exists or not, and finally a positioning result is output. According to the invention, the acquisition of partial discharge signals can be realized, the positioning of the discharge signals can be realized, the reliability of the detection signals is improved by calculating the detection signal-to-noise ratio in real time, the loss of weak discharge signals is avoided, and the positioning accuracy is improved by analyzing and judging the positioning result. According to the invention, effective detection of partial discharge weak signals in a complex environment of industrial and mining enterprises can be met, and sudden insulation faults of equipment are avoided.

The invention provides a three-phase-in-one type parallel multi-level inverter and a motor simulator, the three-phase-in-one type parallel multi-level inverter comprises three phases of inverter circuits, each phase of inverter circuit comprises a plurality of bridge arm branches which are connected in parallel with a direct current bus power supply, the number of the bridge arm branches is equal to that of the inverter circuits, and each bridge arm branch comprises two switching devices which are connected in series; the number of the three-phase one-in-one type magnetic rings is equal to that of the bridge arm branches in any phase of inverter circuit, and each three-phase one-in-one type magnetic ring is formed by spirally winding three wires on the choking coil, one end of each of three wires of each three-phase-in-one magnetic ring is connected with the midpoint of one bridge arm branch in one phase inverter circuit, and the other end of each of the three wires forms a current output end of a corresponding phase according to an in-phase connection mode. According to the inverter provided by the invention, the cascade coupling inductor topological structure of the existing motor simulator is changed, and the problem that the high-frequency circulating current is increased along with the increase of the number of the branches is effectively solved.

The invention relates to the technical field of coupler design, in particular to a bi-directional coupler applied to a high-frequency RFID (Radio Frequency Identification Device) system, which comprises the following steps: S1, respectively constructing a series transformer, a parallel transformer and a Magic-T structure hybrid network, and forming an impedance self-matching coupler core framework by adopting a plurality of Ni-Zn ferrite double-hole magnetic rings; s2, inputting an original coupling signal output by the coupler core architecture into a phase-amplitude cooperative calibration module to generate a calibrated stable coupling signal; s3, inputting the stable coupling signal into a bridging T-type attenuation network group, respectively performing accurate power adjustment on a forward coupling path and a reverse coupling path, and finally outputting a high-directivity and low-fluctuation coupling signal; s4, monitoring the impedance state of an antenna port in real time, and feeding back and adjusting a matching network structure to realize stable control of the standing-wave ratio in a full frequency band range; according to the invention, the design of an external matching circuit is simplified, the coupling efficiency and directivity are improved, and the method has important engineering value.

The invention provides a magnetic conductive device and method, electronic equipment, a storage medium and a program product, and the device comprises a magnetic ring powder cavity which is used for accommodating magnetic ring powder; the magnetizing coil is used for charging to generate a magnetic field; the first magnetic conduction section is used for receiving the magnetic field, so that the magnetic ring powder is subjected to main path magnetic conduction; the second magnetic conduction section is connected to one side of the first magnetic conduction section and is used for inhibiting a receiving magnetic field, so that non-main-path radial or axial magnetic conduction of the magnetic ring powder is reduced; and the third magnetic conduction section is connected to the other side of the first magnetic conduction section and used for restraining the receiving magnetic field, so that non-main-path radial or axial magnetic conduction of the magnetic ring powder is reduced. In this way, the magnetic conductive device is definitely segmented into a plurality of magnetic conductive sections. In the magnetizing process, the magnetic field can be distributed along the preset main path more intensively through the synergistic effect of all the magnetic conduction sections, magnetic field dispersion in the non-main-path radial direction or the axial direction is effectively reduced, the magnetic performance is improved, the expectation can be achieved, and the magnetizing device can adapt to various scenes.

The invention relates to a TMR current sensor adaptive temperature compensation system of a double-air-gap multistage magnetic ring. Comprising a temperature detection module used for obtaining temperature information of the TMR sensor; the processing module is in communication connection with the temperature detection module; the bias control module is controlled by the processing module and is used for adjusting a bias point applied to the TMR sensitive element; and the processing module compares the temperature information with a plurality of preset temperature thresholds to determine a current temperature interval, and controls the bias control module to execute different processing modes according to different temperature intervals. According to the invention, the bias point of the TMR element is dynamically adjusted, the working state of the TMR element is changed, the TMR element always works in an area with the best linearity or the most stable linearity, direct compensation is realized, temperature drift is prevented, and higher measurement precision in the full temperature range is obtained.

The invention belongs to the technical field of additive manufacturing equipment manufacturing, and particularly relates to a wind field detection device for additive manufacturing equipment, which comprises a transverse moving part, and a guide part is arranged on the left side of the transverse moving part; a wind power detection component is arranged at the top of the movable base; the movable base comprises a bearing chassis, and a girdling groove is formed in the lower surface of the bearing chassis. The wind sensor is driven to perform free plane sliding motion in the wind power detection equipment through the transverse moving part, the guiding part and the moving base, so that wind power at different point positions is tested, and in the wind power testing process, the moving base can be tightly attracted to the upper surface of the long sliding rail through the magnetic force of the built-in magnetic ring, so that the wind power detection equipment is more convenient to use. A reinforcing effect is achieved on the moving roller which freely slides, so that the problem that the wheel body at the bottom of the equipment is easy to slip, even shift or topple under the action of wind power when the wind power of a tested wind field is relatively large is avoided.

The utility model discloses a bus filtering device of an electric drive assembly and the electric drive assembly. The bus filtering device comprises: a support member; the first magnetic ring, the first group of Y capacitors, the second group of Y capacitors, the first X capacitor, the second X capacitor, the second magnetic ring, the third group of Y capacitors, the third X capacitor, the fourth X capacitor and the fifth X capacitor are sequentially arranged on the supporting piece from the output end to the input end of the bus; wherein the bus penetrates through the first magnetic ring, the second magnetic ring and the supporting piece, and the first group of Y capacitors, the second group of Y capacitors, the first X capacitor, the second X capacitor, the third group of Y capacitors, the third X capacitor, the fourth X capacitor and the fifth X capacitor are connected with the bus. In this way, the problem that the conducted emission test of a controller product exceeds the standard is solved.

The utility model belongs to electric drive controller technical field, propose a kind of filter module and power domain control unit, wherein a kind of filter module includes shell, second capacitor, ferrite magnetic ring, first capacitor, nanocrystalline magnetic ring and third capacitor are sequentially inlaid with on the surface of shell from input to output, connection line is provided in the shell, second capacitor, first capacitor and third capacitor are all with connection line electricity is connected;The utility model's filter module includes shell, second capacitor, ferrite magnetic ring, first capacitor, nanocrystalline magnetic ring and third capacitor are sequentially inlaid with on the surface of shell from input to output, and then the module of integrated filter of small volume is realized, the volume of filter module is reduced.

The utility model provides an inverter, and the inverter comprises a housing which is provided with an accommodation cavity; the shielding partition plate is connected to the shell and arranged in the containing cavity, and the shielding partition plate is made of an electromagnetic shielding material; wherein the shielding partition plate is located in the middle of the containing cavity, the shielding partition plate divides the inner space of the containing cavity, and a first cavity and a second cavity are formed. The shielding partition plate divides the inner space of the containing cavity into the first cavity and the second cavity, and the first cavity and the second cavity can contain different functional modules, so that the magnetic interference between the functional modules in the first cavity and the functional modules in the second cavity can be reduced, the EMI performance of the whole machine is improved, meanwhile, the arrangement of a magnetic ring is reduced, and the cost is reduced. The equipment assembly difficulty is reduced, and the production capacity is improved.

The utility model relates to the technical field of dual-power-supply automatic change-over switches, and discloses a low-cost PC-level dual-power-supply automatic change-over switch. Comprising a switch shell, the inner walls of the upper side and the lower side of the switch shell are each provided with a plurality of interfaces, the inner wall of the switch shell is slidably provided with a plurality of wiring terminals, the top ends of the wiring terminals make contact with the interfaces above, and the bottoms of the wiring terminals are electrically connected with wires. After the circuit provided by the utility model is powered off, the first lead cannot energize and magnetize the electromagnet, so that the electromagnet loses magnetism and cannot push the magnetic ring to lift, the magnetic ring descends to drive the switching block to be pressed on the upper surface of the switching seat, and the controller can drive the electric push rod to be energized through the switching seat, the switching block and the second lead. The driving piston rod moves to push the push block to move downwards to drive the transmission rod to pull the wiring end to move and be switched to an interface connected with a standby power supply, and automatic switching of the power supply can be ensured.

A Hall signal output device for a mouse scroll wheel. The Hall signal output device comprises an encoder fixing bracket disposed inside a mouse, an encoder scroll wheel rotationally arranged inside the encoder fixing bracket, a magnetic ring disposed inside the encoder scroll wheel, and a Hall encoder disposed on a side edge of the encoder fixing bracket and directly facing the magnetic ring. When being rotated, the encoder scroll wheel drives the magnetic ring to rotate, thereby changing the direction of magnetic field lines of the magnetic ring; and then, after detecting the change in the magnetic field lines of the magnetic ring, the Hall encoder generates a pulse signal and outputs same. The Hall signal output device for a mouse scroll wheel has a simple structure, involves a low production cost, high precision and a high response speed, and meets the usage requirements of contemporary people.

The invention discloses a method and equipment for automatically twisting taps of a network transformer, and relates to the technical field of network transformer production equipment. The device comprises a machine table, a first clamping element, a second clamping element, a third clamping element, a moving module and a rotating module. Wherein the third clamping element is used for clamping the first tap, the first clamping element is used for clamping the third tap, and the second clamping element can move and rotate relative to the machine table and is used for clamping the T2 magnetic ring. The moving module can drive the second clamping element to drive the T2 magnetic ring to move in the direction away from the first clamping element and the third clamping element, and the rotating module is used for driving the second clamping element to rotate relative to the machine table. Through cooperative work of all the components, automatic winding of the first tap and the second tap connected with the T2 magnetic ring can be achieved, the automation degree and production efficiency of network transformer tap winding are improved, stability and consistency of winding quality are guaranteed, and the large-scale production requirement is met.

The utility model discloses an electromagnetic induction structure which comprises a magnet assembly and a spiral coil and is characterized in that the magnet assembly is coaxially arranged outside or inside the spiral coil to provide a radial single-polarity magnetic field for the spiral coil, the magnetic induction line of the magnetic field is perpendicular to a coil wire, and the magnet assembly and the spiral coil move relatively. A radial single-pole magnetic ring for radiation magnetization or a common magnet with the same polarity facing the coil and arranged annularly is adopted as a magnet assembly to provide a radial single-polarity magnetic field for the spiral coil, and when the electromagnetic induction structure is applied to a generator, electric energy output is larger than that of a voice coil motor; when being applied to a motor, the motor can do linear / arc / circular motion, and the stroke is longer than that of a voice coil motor while the output power is ensured.

This utility model discloses a frequency converter controller, including a control unit, a first filtering topology, and a second filtering topology. The first filtering topology includes a differential-mode inductor unit, and the second filtering topology includes a common-mode inductor unit. The first filtering topology is connected to the live wire, neutral wire, and protective ground wire, and receives the input signal from the power input terminal, suppresses the differential-mode noise and common-mode noise of the input signal from the power input terminal, and generates a first electrical signal. The second filtering topology receives the first electrical signal, suppresses the differential-mode noise and common-mode noise of the first electrical signal, and generates a second electrical signal. The control unit receives the second electrical signal. Because a differential-mode inductor unit is added to the first filtering topology, the number of magnetic rings can be reduced, the number of installation steps can be reduced, and costs can be optimized.

The application is suitable for the technical field of power distribution equipment, and particularly provides a transformer, which comprises a magnetic ring, a wire and a framework; the surface of the magnetic ring is coated with an insulating material; the wire is wound on the magnetic ring, and the wire is wrapped with three insulating layers; the framework comprises a stand for bearing the magnetic ring, the stand is provided with a groove for accommodating the magnetic ring, the magnetic ring and the groove are fixed by epoxy resin bonding, the framework further comprises a terminal block arranged at the end of the stand, the terminal block comprises a metal pin for connecting with the wire, and the stand is further provided with an accommodating groove for accommodating the wire when the wire is connected with the metal pin. The technical problems of poor anti-vibration and anti-impact performance, unfirm structure, low working temperature, easy thermal expansion of the wire and poor environmental adaptability of the existing transformer are solved.

The utility model discloses a magnetic ring inductance rotary wire feeding mechanism which comprises a speed reducer fixing plate and a pair of speed reducers symmetrically arranged on the speed reducer fixing plate, an eccentric rotary wire feeding assembly is rotatably connected with the speed reducer fixing plate through the speed reducers, and each speed reducer comprises a longitudinal output shaft. One end of the bottom of the longitudinal output shaft penetrates through the speed reducer fixing plate and is fixedly connected with the eccentric rotary wire feeding assembly, the eccentric rotary wire feeding assembly comprises a wire feeding guide pin used for outputting a metal wire, and the wire feeding guide pin and the longitudinal output shaft are arranged in a non-coaxial mode; the eccentric rotary wire feeding assembly is adopted, copper wires can be tensioned in the wire feeding process, equivalent rotation can be conducted according to rotation of the magnetic ring in the wire feeding process, the magnetic ring is round, and the tensioning end and the wire feeding end of the eccentric rotary wire feeding assembly can rotate along with the track of the magnetic ring. Therefore, the purpose that the thread end can rotate along with the magnetic ring can be achieved; and the stability and the accuracy of magnetic ring winding are improved.

The invention relates to the technical field of geological disaster monitoring, and discloses an automatic monitoring method for monitoring stratum collapse by using a layered settlement meter, which comprises the following steps: step 1), mounting an isolation pipe in a monitoring hole; step 2), placing the isolation pipe provided with the magnetic ring into the monitoring hole; (3) filling a gap between the outer wall of the isolation pipe and the hole wall of the monitoring hole with a backfill soil layer; (4) adjusting the relative positions of a plurality of magnetic layering settlement sensors on the core rod to enable the magnetic layering settlement sensors to be matched with the positions of the magnetic rings, and then loading the core rod into the isolation pipe; 5) matching a data acquisition terminal on the core rod, and configuring power supply equipment on the data acquisition terminal; by drilling holes in hidden danger points, installing isolation pipes and arranging magnetic rings and magnetic layering settlement sensors, layering monitoring of different depths of the stratum is achieved, the limitation that a settlement layer position is difficult to accurately position in traditional monitoring is broken through, and the settlement dynamic state of the stratum of each depth can be clearly captured.