47 results about "Toroidal coil" patented technology

The invention discloses a super-flat wire common-winding motor and a design method, and belongs to the technical field of motor design and manufacturing. The invention discloses an equal-pole common-winding axial magnetic flux motor and a design method, the equal-pole common-winding axial magnetic flux motor comprises a motor winding, a stator, a rotor, a casing and the like, and is characterized in that the number of magnetic poles of the stator and the number of magnetic poles of the rotor are equal, all the magnetic poles of the stator or the rotor on the same disc are excited through the same annular coil winding, and the winding can be a conventional round wire, a flat wire or a super-flat wire; alternatively, two or more concentric circle winding units, such as an outer ring winding unit and an inner ring winding unit, can be arranged on the same disc, radially adjacent iron cores can be shared or can also be independently arranged, meanwhile, the radial size of the shared iron core can be wider in consideration of the magnetic saturation problem, or the radial size of the shared iron core can be smaller in consideration of the magnetic saturation problem. The radial sizes of the iron core and the winding in the small-diameter area can be larger; the working principle can be a reluctance type, a switch reluctance type, a permanent magnet synchronous type, a direct-current motor type or an alternating-current motor type; the direct current motor can be a commutator or a plane commutator; or a brushless control scheme; the alternating current motor can be square wave, sine wave or other waveform; the phase difference of the three-phase alternating current can be 120 degrees; or two-phase or four-phase alternating current or other phase difference current with the phase difference of 90 degrees.

The invention discloses a column switch damp detection method and device and electronic equipment. The method comprises the steps that a damp detection request is received, and the damp detection request carries a target pole-mounted switch identifier; in response to the damp detection request, controlling an energizing device to energize a target pole-mounted switch corresponding to the target pole-mounted switch identifier with a predetermined current, so as to supply power to a corresponding line, the predetermined current being a current with a predetermined frequency change; under the condition that a target pole-mounted switch is powered on, target voltage corresponding to the annular coil is determined, and the target pole-mounted switch penetrates through the annular coil; and determining a damping result of whether the target pole-mounted switch is damped or not according to the target voltage. According to the invention, the technical problem of inaccurate determination of the damp state during damp detection of the pole-mounted switch is solved.

The invention discloses an annular electric pole steel bar corrosion detection method, system and device and a storage medium, and relates to the technical field of corrosion detection.The method comprises the steps that an annular coil is arranged in the circumferential direction of an electric pole, adjustable alternating current is applied, and magnetic field changes are detected to obtain signal data; respectively detecting deep corrosion and surface microcracks by utilizing low-frequency excitation and high-frequency excitation, and carrying out frequency domain fusion to obtain fusion data containing corrosion depth and area characteristics; in combination with eddy current response data, reconstructing three-dimensional corrosion distribution by using an improved back projection algorithm, and outputting related data and a thermodynamic diagram; in combination with the thickness of the concrete protection layer and historical data, the excitation frequency is adjusted, and a machine learning model is applied to obtain an optimization frequency, a corrosion mode and a development trend prediction result; according to the invention, the eddy current in the reinforcing steel bar is excited through the annular coil array, and the non-contact and high-precision detection of the corrosion of the reinforcing steel bar in the cylindrical concrete pole is realized by combining a multi-frequency excitation strategy and a three-dimensional signal reconstruction technology.

The invention provides a supporting device for a non-planar star simulator coil, the supporting device comprises a base and a plurality of supporting assemblies arranged at intervals in the circumferential direction of the base, and each supporting assembly comprises a height adjusting part, an angle adjusting part and a mounting part, one end of the height adjusting part along the height direction is connected with the corresponding position of the base, the other end is connected with the mounting part through the angle adjusting part, the mounting part is provided with a mounting groove, and the side wall of the corresponding position of the coil is embedded in the mounting groove. According to the supporting device, the height of the mounting part relative to the base is adjusted through the height adjusting part, and the inclination angle of the mounting part relative to the height direction is adjusted through the angle adjusting part, so that the corresponding position of the coil can be embedded into the mounting groove of the mounting part in a matched manner; particularly, when the supporting device supports the non-planar annular coil, the shape of the coil does not deform, and the production precision of the coil is improved.

The invention relates to an electronic cut-off protection device comprising: a phase current line (P), a current sensor comprising at least one toroid (4) configured to measure the current flowing in said phase current line (P), an electronic cut-off unit (5) comprising at least one electronic power cut-off component (6) arranged on said phase current line (P), an electronic protection trip device, a phase conductive plate (7) forming on the one hand a part of the phase current line (P) and on the other hand a heat sink (8) and being electrically and thermally connected to said electronic cut-off unit (5), characterized in that the phase conductive plate (7) comprises a first conductive measuring portion (9), the phase conductive plate (7) and the first conductive measuring portion (9) being a first single-piece conductive part (10),and in that the torus (4) is arranged around the first conductive measuring portion (9).,

The purpose of the present invention is to improve the accuracy of position detection of an electromagnetic induction pen using an EMR sensor disposed so as to overlap a display device. This position detection device is provided with: an EMR sensor (15) disposed so as to overlap a display device; and a sensor controller (20) connected to the EMR sensor (15). The EMR sensor (15) includes a plurality of loop coils (LCx) arranged side by side in the X direction of the panel surface. The sensor controller (20) detects the position of the electromagnetic induction pen (2) on the basis of an alternating current (Rx2) generated using both a first alternating current output from a first loop coil (LCx) located in the vicinity of one end in the X direction among the plurality of loop coils (LCx) and a second alternating current output from a second loop coil (LCx) located in the vicinity of one end in the X direction among the plurality of loop coils (LCx). The second alternating current is output from a second loop coil (LCx) located on the opposite side of the first loop coil (LCx) across the center in the X direction of the panel surface.

The invention relates to the technical field of high-pressure valves, in particular to a low-power-consumption bistable electromagnetic actuator for a valve, which comprises a casing main body for accommodating other parts of the electromagnetic actuator, introducing a control wire and allowing an output component to penetrate out; the stator assembly comprises annular coil devices which are symmetrically arranged in the axial direction and generate armature magnetic flux to control an output component to move transversely, and control wiring to control the time sequence of the armature magnetic flux generated by the coil devices. The middle iron core assembly comprises a permanent magnet device capable of generating permanent magnetic flux, and the permanent magnet device is located in the symmetrical middle of the symmetrically-arranged annular coil device and used for conducting electromagnetic fixing on the output component after transverse movement is finished. The armature assembly is used for driving the output component to retract into or penetrate out of the machine shell body under the action of armature magnetic flux to execute valve switch control action, and the armature assembly is arranged in the stator assembly and penetrates through the middle iron core assembly. According to the invention, a novel composite magnetic circuit under the dual action of a constant magnetic source and an electromagnetic field is constructed, so that bidirectional active switching between steady-state positions is realized.

toroidal coil arrangement (10), comprising - a toroidal outer coil (12) with a plurality of electrically interconnected outer windings enclosing an outer coil interior, and - a toroidal inner coil (14) arranged concentrically to the outer coil (12) within the interior of the outer coil, with a plurality of electrically interconnected inner windings, wherein each of the coils (12, 14) has a pair of terminals (121; 141) for its separate electrical contacting, characterized by that the outer coil (12) has two open ring rails (122a,b) running at a constant distance from each other, defining an annular gap (124) between them, which are connected to each other by conductor arcs (123) distributed evenly over their circumference, forming the outer windings.

The utility model relates to the technical field of electroacoustics, concretely is a kind of low-frequency amplitude enhancement and welding plate conjoined annular coil plane diaphragm, including one annular diaphragm frame, and diaphragm frame is set in the diaphragm unit, diaphragm unit is equipped with plane coil unit;Diaphragm unit includes first diaphragm and the combined second diaphragm concentric with first diaphragm, the outer diameter of second diaphragm is wider than first diaphragm, and the rigidity of first diaphragm is greater than second diaphragm;The outer edge of diaphragm frame is equipped with the flexible circuit board electrically connected with two plane coil arrays, and the end of flexible circuit board away from diaphragm frame is equipped with a pair of connecting pad.The amplitude of second diaphragm in the utility model will be significantly greater than first diaphragm, to significantly improve the low-frequency performance of diaphragm, still through flexible circuit board, connecting pad is extended to the outside of diaphragm frame, it is convenient to connect audio signal line, also can utilize earphone internal space, more convenient assembly.

A compact superconducting energy storage cell includes a CEC Coil Assembly comprised of a plurality of axially stacked CEC Coil Modules. Each CEC Coil Module has two, double-pancake HTS coils and at least one coil assembly circumferentially surrounding the coil core. The coil assembly has at least two coils of superconductor coil windings with at least one spacer disposed therebetween with the at least two coils and the at least one spacer being stacked along the central axis. An insulator sleeve is disposed about the CEC Coil Assembly. A radiation shield cup and a radiation shield cap together define a first interior containing the insulator sleeve encapsulating the four axially stacked CEC Coil Modules. An outermost enclosure having an outermost chamber and an outermost cap together define a second interior that contain the at least one inductor module disposed therein.

The present invention is relating to an electromagnetic relay (100) comprising a bobbin assembly (10) a comprising a bobbin (12) wound with an annular coil (14), a core (16) insertable into said bobbin (12) and plurality of yolks (18). Further, the electromagnetic relay (100) comprises a plurality of contacts (20) that includes at least one fixed contact (20a) and at least one movable contact (20b) are configured to open and close the electromagnetic relay (100). In addition, a floating type pusher (30) configured to transfer armature (22) movement to the movable contact (20b) upon activation of said coil (14). Accordingly, the electromagnetic relay (100) is formed integrally enclosed in a moulded plastic casing (40) as a monobloc, and the casing (40) is configured to provide electric isolation in the electromagnetic relay (100).

The utility model provides a controllable electric parameter-based electromagnet electromechanical characteristic detection and verification device, which comprises controllable electric parameters, an operational amplifier, a high-power field effect transistor, a high-power current sampling resistor group, a power relay group, a cross-core Hall current sensor and a direct-current stabilized power supply, meanwhile, the verification device also comprises an annular coil winding, a rotating ratchet wheel, a rotating arm and an iron core. The verification device can simulate various electromechanical parameters such as coil peak current of the electromagnet, coil current output time, initial-stage current rise rate, initial motion time of the electromagnet, time when the electromagnet strikes the tripping mechanism, motion time of the tripping mechanism, action time of an auxiliary switch and the like. When the electromagnet electromechanical property detection instrument detects the parameters, the verification device can verify the performance of the tester, and has the characteristics of convenience in operation, traceability, wide verification range, high precision, safety, reliability and the like.

The inductor module is composed of a body (1) and an insulation assembly (2), and the body is provided with a middle column magnetic core (1.1), a yoke magnetic core (1.2), an annular coil (1.3), a side column (1.4) and a leading-out wire (1.5); the insulation assembly is composed of a binding belt (1.6), a base plate (2.1) and a cover plate (2.2), a yoke iron magnetic core (1.2) is contained in a groove (2.1. 1.1. 1) of the base plate, a center pillar magnetic core is contained in a circular through hole (2.1. 1.2) of the base plate, an annular coil (1.3) is positioned by an annular protrusion (2.1. 1.3), a coil outgoing line welding portion (1.5. 1) is contained in a cuboid-shaped cavity (2.1. 1.7. 1), a perforated chamfer (2.1. 1.7. 2) is used for fixing an outgoing line (1.5) through the binding belt (1.6), and an open groove (2.1. 1.7. 4) plays a guiding role when the cover plate (2.2) is installed. And when the cover plate (2.2) is hooked by the buckle (2.2. 2) to the open hole (2.1. 1.7. 3), the cover plate (2.2) is fixed. According to the invention, the production efficiency is improved, the cost is reduced, and the product reliability is improved. And the assembled body is good in appearance consistency, and automatic production can be achieved easily.

Linear motor for imparting a thrust to a movable unit (3) capable of linearly moving freely in a direction of movement (A), comprising: a base plate (2) which has a flat shape extending longitudinally in the direction of movement (A) and which is magnetically conductive to perform the function of a stator; a frame (3) having a flat shape extending in the direction of movement (A), which is formed from magnetically non-conductive material, to face the base plate (2) and which is movable relative to the base plate (2) by a linear guide (4) arranged on the base plate (2), thus functioning as a movable unit (3); a number of permanent magnets (61) arranged on one side of the base plate (2) by arranging a positive and a negative pole in the direction of movement (A); and a number of flat-shaped ring-like coils (5, 5U, 5V, 5W) arranged along the arrangement direction of the permanent magnets (61) and fixed as armatures to one side of the frame (3) so as to face the permanent magnets (61) while leaving an electromagnetic gap; a number of reinforcing members (51) made of magnetically non-conductive material, arranged within the respective ring-like coils (5, 5U, 5V, 5W) and having a flat shape, wherein a surface of the frame (3) fixing the coils (5, 5U, 5V, 5W) is provided with a recess portion (3B) providing an air gap between the surface to which the coils (5, 5U, 5V, 5W) are fixed and the coils (5, 5U, 5V, 5W); wherein the coils (5, 5U, 5V, 5W) are connected at their two ends to the frame (3) through their two side portions (5A) around the recess portion (3B) via a thermally conductive fixing coating (52); wherein the area of ​​the side of the frame (3) on which the recessed portion (3B) is arranged and the coils (5, 5U, 5V, 5W) are fixed is made of magnetically non-conductive material.

The invention provides an energy and signal parallel transmission coupling device and a train, which can be applied to the technical field of wireless electric energy transmission. The coupling device comprises an energy transmission coil which transmits energy to a load and comprises an energy transmission primary coil and an energy transmission secondary coil; the forward signal transmission coil transmits signals to a load and comprises a signal transmitting main coil and a signal receiving auxiliary coil. The reverse signal transmission coil receives a signal from a load and comprises a signal transmitting secondary coil and a signal receiving primary coil; the energy transmission main coil and the energy transmission auxiliary coil respectively comprise M pairs of first rectangular coils and M pairs of second rectangular coils, each pair of rectangular coils are connected in series after being reversely wound, and the signal transmitting main coil, the signal receiving main coil, the signal transmitting auxiliary coil and the signal receiving auxiliary coil respectively comprise M pairs of annular coils, each pair of annular coils are wound in the same direction and then are connected in series, and every two of the energy transmission coil, the forward signal transmission coil and the reverse signal transmission coil are decoupled.

The invention provides a sensor having a receiving coil wound twice, a position detection device, and a sensor controller. The sensor (31) includes an outer loop coil (OC), one end of which is connected to the output terminal (T1), and an inner loop coil (IC), the other end of which is connected to the output terminal (T2). The other end of the outer toroidal coil (OC) and one end of the inner toroidal coil (IC) are connected to each other by a bridge conductor (BC) that spans the inner toroidal coil (IC).

This invention relates to the field of coil processing technology, specifically to a device for shaping and cutting the lead wire of a toroidal coil. The device includes a main unit, a support, multiple sets of insertion holes on the support, and a control console on the support. The control console includes a positioning unit, comprising a fixing mechanism on the support for clamping the toroidal coil and a positioning mechanism on the fixing mechanism. Through the automated coordinated action of the positioning unit, the entire process reduces manual intervention, preventing phenomena such as skewed insertion after the lead wire is inserted into the insertion hole. This avoids problems such as incomplete correction and length deviation after cutting during subsequent shaping and cutting. Furthermore, the cutting unit performs secondary shaping of the lead wire, while a cutter cuts it along a preset stroke, further improving the quality and efficiency of shaping and cutting the lead wire of the toroidal coil. This ensures the assembly accuracy with power distribution equipment and the stability of electrical performance during use.

The invention relates to the technical field of inductance coils, in particular to an arc-impact-resistant annular coil for a high-voltage electric power metering mutual inductor, which comprises two mounting frames, a fixing rod, a coil body, two mounting mechanisms and two fixing mechanisms, and is characterized in that each mounting mechanism comprises a pressing assembly, two driven blocks, two springs I, two connecting rods and two fixing heads; after the pressing assembly is pressed down and the two mounting frames are fixed to the mounting position through the two mounting mechanisms, the coil body is mounted on the two mounting frames through the fixing rods, the pressing assembly is loosened, the two driven blocks are pushed to be close to each other through resilience force of the two first springs, the two driven blocks drive the two fixing heads on the two connecting rods to be close to each other, and the coil body is mounted on the coil body. And when the two fixing heads enter the fixing holes in the fixing rod, the fixing rod is fixed, and the installation of the coil body can be completed, so that the problem that the installation efficiency is relatively low due to the complicated installation process of the existing annular coil is solved.

A mounting structure of an annular coil of a voltage stabilizer comprises a mounting rack, a bottom plate is arranged at the bottom of the mounting rack, the annular coil is fixedly mounted on the bottom plate, an upward boss is arranged in the middle of the bottom plate, an insulating gasket is arranged on the boss, an insulating paper board is arranged on the insulating gasket, and the annular coil is fixed to the boss through a plurality of long screws. The insulation gasket comprises a flange base and a vertical convex ring, the vertical convex ring is matched with the boss, the lower port of the middle hole of the annular coil is matched with the vertical convex ring after assembly, the vertical convex ring is tightly matched with the boss, the edge opening of the through hole in the middle of the insulation paper board abuts against the flange base, the flange base abuts against the bottom plate, and the flange base abuts against the bottom plate. And a gap is formed between the insulating paperboard and the bottom plate. The annular coil can be limited on the bottom plate through the boss, the annular coil is prevented from shaking due to vibration and the like, electrical isolation is doubly guaranteed through the insulating paper board and the gap, the insulating performance is stable and reliable, heat dissipation is further facilitated, and the performance of the voltage stabilizer can be improved.

The invention relates to the technical field of plasma processing equipment, and provides an induction coil structure adjusting assembly and plasma processing equipment. The assembly includes an induction coil construction device, a magnetic sensor array, and a drive mechanism. The device comprises a first coil segment group and a second coil segment group, the first coil segment group and the second coil segment group are constructed into two groups of coil segments which are formed by a plurality of annular coil pieces which are concentrically arranged and are symmetrically separated in at least one direction in a one-to-one manner; each connector is arranged to be capable of moving to the connecting part between the electrically-connected segment groups, so that the electrically-connected coil segments form an induction coil; the magnetic sensor array is matched to detect the magnetic field intensity distribution of the target area of the induction coil, the drive mechanism is used to adjust the segment connected with the connector, the induction coils of different sizes and structures are flexibly constructed to adapt to different processes, the efficiency is improved, and the magnetic field intensity distribution of the target area is adjusted according to requirements.

A vibration actuator according to the present invention includes: an electromagnet formed by laminating a flat annular coil on a plate surface of a plate-shaped magnetic core; a magnetic member having a lower surface facing the coil from above; a spacer disposed on the lower surface at the outside of the coil and separating the magnetic member and the electromagnet in a vertical direction; and an elastic support part disposed outside the coil and connecting the magnetic core and the spacer. As a result of a magnetic force being generated by energization of the coil, one of the magnetic member and the electromagnet is displaced so as to approach the other to vibrate.

The application 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 at improving the problems of insufficient flexibility of ship degaussing, degaussing response lag and low energy utilization efficiency, obtaining ship water area magnetic field distribution and sailing track information through the arrangement of a fluxgate sensor and a high-sensitivity magnetometer, dividing a measurement area, standardizing magnetic field intensity and sailing speed, applying a multidimensional analysis method to generate labels through magnetic field classification, marking the magnetic field change trend in the sailing stage, detecting the magnetic field fluctuation amplitude and frequency, calculating a comprehensive magnetic loss coefficient and setting a degaussing level. After receiving the judgment result, hierarchical degaussing is implemented through the floating annular coil according to the priority order and the compensation efficiency threshold, the electromagnetic stealth capability of the ship can be significantly improved, the manual intervention and energy consumption can be reduced, and efficient, intelligent and energy-saving ship magnetic management is realized.

A superconducting magnet assembly, the superconducting magnet assembly comprising: a main magnet assembly (10), the main magnet assembly including at least one toroidal coil (12) arranged around an axis, and at least one shielding coil (16), the shielding coil having a diameter larger than that of the main magnet assembly (10) and arranged around the axis. At least one support member (20; 60) is attached to the shielding coil (16) and the main magnet assembly (10).

This invention provides a support device for a non-planar stellarator coil. The support device includes a base and multiple support components spaced circumferentially along the base. Each support component includes a height adjustment component, an angle adjustment component, and a mounting component. One end of the height adjustment component is connected to a corresponding position on the base, and the other end is connected to the mounting component via the angle adjustment component. The mounting component has a mounting groove for embedding the sidewall of the coil at a corresponding position. This support device adjusts the height of the mounting component relative to the base using the height adjustment component and adjusts the tilt angle of the mounting component relative to the height direction using the angle adjustment component. This allows the coil to fit snugly into the mounting groove of the mounting component. In particular, when supporting a non-planar toroidal coil, the coil's shape remains unchanged, improving the coil's manufacturing precision.

An electric drive comprises a stator and a rotor and a plurality of coils of a winding. The stator a toroidal coil carrier, the cross-sectional area of the toroidal coil carrier having the shape of an ellipse, in particular a circle. The coils of the winding are wound around sections of the toroidal coil carrier.

A stator part comprises a coil rack, two groups of annular coils wound on the coil rack, a pair of magnetic steels arranged at the end parts opposite to the annular coils respectively, and an upper bearing and a lower bearing arranged at the centers of the end parts of the upper end and the lower end of the motor shell, wherein the outer sides of the magnetic steels are fixedly attached to the inner wall of the motor shell; the rotor part comprises a rotor iron core and a rotating shaft penetrating through a shaft hole of the rotor iron core; the end cover covers the opening at the bottom end of the motor shell, and the lower bearing is arranged on the end cover; the coil frame is fixedly connected with the motor shell, the rotor iron core is arranged in an inner cavity of the coil frame, the upper end of the rotating shaft continuously penetrates through the motor shell and the upper bearing and extends outwards, and the lower end of the rotating shaft is connected with the lower bearing. The motor is simple and compact in structure, large in rotating shaft swing amplitude, low in manufacturing cost, stable in performance and suitable for popularization and application.

A position detection sensor is configured by adhering a sensor pattern portion to one face of a base material with an adhesive material, the sensor pattern portion being obtained by making each of a plurality of electrode conductors composed of a wire covered with insulation into a prescribed conductor pattern, and reducing deformation of wiring of the sensor pattern portion. The sensor pattern portion is composed of a first coil group in which a plurality of annular coils are arranged at prescribed intervals in a first direction, and a second coil group in which a plurality of annular coils are arranged at prescribed intervals in a second direction orthogonal to the first direction, the annular coils being composed by winding a wire a prescribed number of times. The annular coils of the first coil group and the annular coils of the second coil group are alternately stacked at intervals of 1 to a plurality, and are adhered to the base material with the adhesive material.

A coil module, a wireless charging receiving device (20), and a wireless charging system (01), which relate to the technical field of wireless charging, and can simultaneously take into account the effects of lightness and thickness, high power, and high-degree-of-freedom wireless charging. The coil module operates in a magnetically-coupled wireless charging system (01) with a frequency less than or equal to 500 kHz; the coil module comprises a coil structure (31), which coil structure (31) is a toroidal coil, wherein the thickness of the coil structure (31) is less than or equal to 0.175 mm and is greater than or equal to 0.07 mm, the outer diameter of a coil of the coil structure (31) is less than or equal to 52 mm and greater than or equal to 46 mm, and the inner diameter of the coil of the coil structure (31) is less than or equal to 28 mm and greater than or equal to 16 mm; and the inductance of the coil module is less than or equal to 6 μH and is greater than or equal to 4 μH.

The invention discloses a magnetic coupling mechanism for a wireless power transmission system and an anti-offset design method thereof, the magnetic coupling mechanism comprises a transmitting end and a receiving end magnetic coupling mechanism, the transmitting end is of a double-layer planar structure, the lower layer is an annular coil, and the receiving end is of a double-layer planar structure; the upper layer is a fan-shaped coil array which is formed by splicing and arranging a plurality of fan-shaped coil units with the same design and has the same outer diameter as the lower-layer circular ring, all the fan-shaped coil units are connected in series, and the receiving end is a single circular ring-shaped coil. According to the anti-offset design method of the magnetic coupling mechanism, a mutual inductance calculation model of the magnetic coupling mechanism with a transmitting end multi-coil combination is established, a plurality of key parameters of a sector coil unit are optimized, the transmitting end magnetic coupling mechanism with a stable magnetic field distribution characteristic is constructed, and the anti-offset capability of a magnetic coupling resonant wireless power transmission system is improved. According to the anti-offset design method, the effective area of a wireless electric energy transmission area is increased on the premise of ensuring power stability in the wireless electric energy transmission process of the system, so that the system has better anti-offset capability.

The utility model discloses a pair of transmitting calipers of an underground cable detector. The transmitting calipers comprise a controller, an annular coil and a cavity, a fixing block is arranged at the top of the controller, an inserting block is arranged at the bottom of the fixing block, and the inserting block extends into the controller; the movable plate and the inclined block can be pushed to move through the elastic force of the spring, the side edge of the movable plate drives the fixed insertion plate to be separated into the fixed insertion groove in the insertion block, fixation of the insertion block is relieved, then one end of the bolt is separated into the insertion block, fixation of the insertion block is relieved again, and the fixed block is pulled out again. Therefore, the plug-in block can be separated into the controller, and the controller is convenient to disassemble for maintenance or replacement. The underground cable is sleeved with the annular coil, the underground cable is detected, meanwhile, the annular coil can be opened through the grip by means of the arrangement of the pin shaft, the underground cable can also be placed in, and operation and use are facilitated.