50results about How to "Stable and effective fixation" patented technology

The invention relates to indoor golf swing exercising equipment. In the invention, the disadvantages that the equipment in the existing similar technology is large and complex, and has high cost and overhigh exercising cost, the batting deviation degree is difficult to be computed accurately, the target heart is easy to misread, the thread gluing structure lacks specific technical means and the ball is easy to shift or fall off, are overcome; the main points of the technical proposal are as follows: the equipment is characterized in that the equipment comprises a suspension type target board, a kicking-off pad which is placed on the ground, more than one light ball and more than one golf club, wherein the target heart, one principal horizontal line and one principal vertical line which pass through the target heart are arranged on the target board, scales are marked on the principal horizontal line and the principal vertical line, a divided vertical line which penetrates through the board surface of the target board is arranged on the setting scale of the principal horizontal line, a divided horizontal line which penetrates through the board surface of the target board is arranged on the setting scale of the principal vertical line, a light ball fixture is arranged on the board surface of the target board, a ball placement central point and a calibration line which passes through the ball placement central point are arranged on the kicking-off pad, and a target board surface fixture is arranged on the light ball.

The invention discloses a multifunctional power field transmitting facility, and mainly relates to the field of power facility planning. The multifunctional power field transmitting facility comprises rectangular frames hooked and hung on cables. Triggering baffles are hinged to the positions of openings of the rectangular frames. The inner ends of the triggering baffles press rubber clamping blocks with compression springs. A connecting plate is arranged below the rectangular frames and provided with a feeding platform. The feeding platform is provided with rubber belt tracks used for clamping and pushing the cables. Bearing pulleys are arranged below the connecting plate, the cables are wound around the bearing pulleys, the lower ends of the cables are wound around fixed pulleys, and the cables are provided with a lifting hopper. The fixed pulleys are installed on a fixing plate, and inserting columns are arranged on the bottom face of the fixing plate. The multifunctional power field transmitting facility further comprises fixing columns matched with the inserting columns. Spearheads capable of ascending and descending are arranged at the bottom ends of the fixing columns, and trundles are arranged on one sides of the fixing columns. The multifunctional power field transmitting facility has the beneficial effects that the cables can be stably pushed from the high position, conveying of objects and the cables between the high position and the ground can be finished, and the self-conveying function is achieved as well.

The invention discloses a fixator for fixing copper strip scrolls, and the fixator comprises a fixator body, an elastic rubber mat is filled in the fixator body, the center of the elastic rubber mat is provided with a plug channel, a plug stick is led in the plug channel, one end of the plug stick is led in the plug channel in the elastic rubber mat, the other end of the plug stick is protruded out of the fixator body, the upper end of the protruded end of the plug stick is connected with a push seat, the outer side of the fixator body is convexly provided with multiple pin-inserting rods, one ends of the pin-inserting rods are fixedly arranged on the elastic rubber mat, and the other ends of the pin-inserting rods are led out of the fixator body. Through the way, the fixator disclosed by the invention can be used for effectively and stably fixing copper strip scrolls; the pin-inserting rods are knocked in a timber pile of a copper strip scroll in a stamping mode, then the fixator is driven to rotate by a motor and then the copper strip scroll is driven to rotate, so that the winding or withdraw of copper strips is implemented.

The invention relates to a combined internal fixator for fixing laparoscopic gastric banding. The combined internal fixator is characterized by comprising a T-shaped bone fracture plate, a bone fracture plate for posterior acetabular wall dissection, a locking combined screw, a minitype screw and a fastening screw, wherein the T-shaped bone fracture plate and the bone fracture plate for posterior acetabular wall dissection are fixed by virtue of the locking combined screw; the longitudinal section of the T-shaped bone fracture plate is provided with a locking combined hole; multiple minitype screw holes are uniformly distributed in the transverse section of the T-shaped bone fracture plate; the minitype screw passes through the minitype screw holes so as to fix the T-shaped bone fracture plate to a skeleton; multiple holes are uniformly distributed in the bone fracture plate for posterior acetabular wall dissection, the hole at the middle of the bone fracture plate for posterior acetabular wall dissection is a locking combined hole, the holes at two ends of the bone fracture plate for posterior acetabular wall dissection are fixing holes, and the fastening screw passes through the fixing holes as to fix the bone fracture plate for posterior acetabular wall dissection to the skeleton. The combined internal fixator is unlikely to slide, is capable of adjusting the structure as required and is good in fixation effect.

The invention discloses a device capable of automatically and stably clamping PCBs. The device comprises a bottom board; the upper end of the bottom board is fixedly connected with a first control board; a fixing groove is formed in the side wall of the first control board; the top face of the fixing groove is fixedly connected with a first elastic part; the lower end of the first elastic part isfixedly connected with a first pressing board; the upper end of the bottom board is fixedly connected with a second control board; a left-and-right communicating through hole is formed in the side wall of the second control board; a threaded rod is arranged inside the through hole in a penetrating mode; the end, close to the first control board, of the threaded rod is in threaded and sleeved connection with a connection board; the side wall of the connection board is fixedly connected with a plurality of third telescopic rods; the ends, away from the connection board, of the third telescopic rods are fixedly connected with the side wall of the second control board; the side wall of the connection board is fixedly connected with a plurality of connection rods; and the connection rods are arranged at the side wall of the end, away from the third telescopic rod, of the connection board. The device can stably clamp the PCBs and can also clamp the PCBs of different specifications.

The invention belongs to the technical field of architecture construction, and particularly relates to a good-vibration-reducing-performance fixing device for architectural engineering construction equipment. The problem that the vibration reducing performance of architecture construction equipment is poor is solved. According to the scheme, the fixing device comprises a supporting base, the outerwalls of the four corners of the bottom of the supporting base are all provided with first grooves, and the inner walls of the tops of the four first grooves are all connected with vertically-arranged limiting blocks through bolts; the outer walls of the centers of the bottoms of the four limiting blocks are all connected with vertically-arranged first supporting columns through bolts; and the outer walls of the centers of the bottoms of the four first supporting columns are connected with vertically-arranged damping springs through bolts. The good-vibration-reducing-performance fixing devicefor the architectural engineering construction equipment is provided with the damping springs and rubber blankets, vertical vibration of the architectural engineering construction equipment can be reduced during operation of the architectural engineering construction equipment, meanwhile, balls and second supporting columns are arranged, vibration of the architectural engineering construction equipment can be further reduced, and the quite effective vibration reducing effect is achieved.

The invention discloses a welding tool clamp which comprises a base, a first fixing frame and a second fixing frame. The first fixing frame and the second fixing frame are arranged on the base. Sliding rails are arranged at the positions where the bottoms of the first and second fixing frames are connected with the base respectively. The first fixing frame and the second fixing frame are provided with limiting blocks used for fixing and matched with the sliding rails. A first fixing clamp and a second fixing clamp are arranged at the upper end of the first fixing frame and the upper end of the second fixing frame correspondingly and are of a crossed structure. The first fixing clamp and the second fixing clamp are correspondingly and fixedly connected through buckle structures. The welding tool clamp carries out fixing through the two correspondingly-arranged fixing frames, the stable and effective fixing effect is achieved by moving and fixing the buckles on the clamps, operation is convenient, and the using effect is good.

The invention relates to the technical field of sphere machining equipment, and discloses a clamping mechanism used during machining of a bolt sphere reference surface. The clamping mechanism comprises a mounting base, wherein a fixing sleeve is fixedly arranged inside the left side of the mounting base, the inside of the fixing sleeve is movably connected with a locking nut in a sleeving mode, the fixing sleeve is in transmission connection with the locking nut through an adjusting mechanism, a locking screw rod is in threaded connection with the inside of the locking nut, a fixed pressing plate is arranged at the right end of the locking screw rod, and the inside of the right side of the mounting base is movably connected with an adjusting sleeve in a sleeving mode. According to the clamping mechanism used during machining of the bolt sphere reference surface, through the arrangement of a three-claw pressure rod, the pressure can be simultaneously applied to one side of a bolt spherefrom three directions, and with the cooperation of the extrusion by the fixed pressure plate, the bolt sphere can be stably and effectively fixed at a certain position, the problem of rolling or tilting due to cutting stress is avoided, and the stability and the reliability of the clamping mechanism are effectively improved.

The invention relates to a cast-in-situ steel mesh frame sandwich heat-insulating shear wall and a construction method thereof. The abdominal wire of a steel mesh frame sandwich heat-insulating plate used by the shear wall is a straight wire, a horizontal elastic support is arranged every other floor, each horizontal elastic support comprises a plurality of vertical additional bars which are arranged horizontally at intervals and a plurality of U-shaped anchor bars which are arranged horizontally, the U-shaped anchor bars are all inserted on a heat-insulating cushion block, and are divided into two layers which are vertical align, and each layer is horizontally arranged at intervals. the heat-insulating cushion block extends and is placed between the upper and the lower steel mesh frame sandwich heat-insulating plates, the arm part and the U shape bottom part of each U-shaped anchor bar are solidified in an inner and outer wythes correspondingly, and the upper and the lower ends of each additional bar are solidified in outer wythes of an upper floor and a lower floor. In the construction process of the horizontal elastic support, the heat-insulating cushion block and the U-shaped anchor rods are mounted firstly, and then the steel mesh frame sandwich heat-insulating plates are mounted in an aligned mode to make an outer side steel mesh be connected with the upper portion of the vertical additional bar embedded in the lower floor. The cast-in-situ steel mesh frame sandwich heat insulating shear wall can solve the problems of cracking and separation of outer wythes, and is particularly suitable for high buildings.

The invention discloses a 5G communication server conveying device which comprises a case. A case door fixed through hinge is arranged at one end of the case, a handle is arranged at one end of the case door, a conveying frame is arranged at one side of the case, a grip is arranged at one end of the conveying frame, a plurality of uniformly distributed universal wheels are arranged at the other end of the conveying frame, a plurality of uniformly distributed tray mechanisms for placing 5G communication servers are arranged in the case, a buffering mechanism is arranged at one end of the case,the tray mechanisms are arranged at one end of the buffering mechanism, one end of the conveying frame is provided with a pulley mechanism for controlling the lifting of the case, one end of the pulley mechanism is connected with the case, and the other end of the conveying frame is provided with a fixing mechanism. The 5G communication server conveying device has the beneficial effects that the tray mechanisms are used for fixing the positions of the servers, so that the servers are prevented from colliding with other components in the transportation process, the tray mechanisms can adapt tothe servers with different sizes, and the practicability is improved.

The invention discloses a bearing seat and particularly discloses an adjustable hubbed flange bearing seat. The bearing seat is characterized in that a neck part of the bearing seat is adjusted according to the length of the fixed object; the neck part can be flexibly divided into two grades; a bottom plate of the bearing seat is a four-stud-hole seat and is rectangular; device holes are formed in four corners of the bottom plate of the bearing seat; an insulation material gasket is adopted between the bearing seat and the bottom plate; the bearing seat is cast and molded by alloy steel material. The bearing seat is importantly characterized in that the flange is integrated with the bearing seat; the bearing seat is convenient to use and can bear high pressure; the adjustable neck part is relatively wide in application range; the four-stud-hole seat is more firmly and effectively fixed.

The invention provides a noiseless winch. The noiseless winch comprises a base, a transmission system and a braking system. The transmission system comprises a transmission shaft, a windlass assembly and a first gear. The transmission shaft and the windlass assembly are both arranged on the base, the first gear is connected to the transmission shaft through threads, and the first gear is engaged with the windlass assembly. The braking system comprises a second gear and third gears, the second gear is arranged on the transmission shaft in a sleeving manner and located on one side of the first gear, and a gap exists between the first gear and the second gear. The first gear and the second gear are selectively locked in an attaching manner so that rotation of the first gear and the windlass assembly can be stopped. The third gears are fixed to the base, the third gears are provided with one-way bearings, the one-way bearings are arranged on the third gears so that the third gears only can rotate in one direction, and the second gear is engaged with the third gears.

The invention relates to the technical field of medical apparatuses and instruments, in particular to a shoulder surgery plate. The shoulder surgery plate comprises a head fixing frame, wherein the back end face of a back plate body is fixedly provided with a fixing frame, the lower end of the fixing frame is movably connected with a group of fixing rods through connecting shafts, two ends of eachfixing rod are respectively and detachably connected with a group of connecting bases, the upper ends of the fixing rods are hinged to the fixed ends of a group of pneumatic springs, the movable endsof the pneumatic springs are hinged to the fixing frame, the fixing frame is fixedly provided with a head mounting square pipe, a head fixing frame is arranged in the head mounting square pipe, two shoulder installing square pipes are also symmetrically arranged on the fixing frame, and a left shoulder plate and a right shoulder plate are arranged in the two shoulder installing square pipes respectively. The shoulder surgery plate is of a left-right split structure, the corresponding shoulder plates are detached according to the surgical part of a patient during shoulder surgery, surgery canbe executed when the patient is at a sitting posture, and the operation is easier.

The invention discloses an emergency biochemical test device. The emergency biochemical test device comprises a fixed device body, wherein the right side of the fixed device body is provided with a matched insertion port, the left side of the matched insertion port is communicated with an electrifying groove, the bottom of the matched insertion port is communicated with a containing groove, a locking sliding head is arranged in the containing groove, the locking sliding head is slidably cooperatively connected with the containing groove, a first pressing spring is fixedly connected between thelocking sliding head and the inner bottom wall of the containing groove, the locking sliding head can extend upward into the matched insertion port, and the left end of the locking sliding head is fixedly provided with a connecting rod. The emergency biochemical test device has the advantages that the structure is simple, a container containing an inspection object can be effectively and stably fixed, matched insertion and electrifying are completed on an inspection instrument synchronously, the electrifying is stable, and the biochemical detection of the inspection object can be performed efficiently and quickly.

The invention relates to a machine tool positioning device with an auxiliary molding block. The machine tool positioning device mainly comprises a fixed side plate with an information transceiver, a fixed sliding block, a fixed bottom plate, an auxiliary rotator, an auxiliary rotating body, a threaded rod, a tapered hole and the auxiliary molding block. The machine tool positioning device has the characteristics of being simple to operate, convenient to use and reasonable in design, and a workpiece can be more stably and effectively fixed.

The invention discloses an agricultural technique popularization data storing and displaying device. The agricultural technique popularization data storing and displaying device comprises a support, a power device, a guide shaft lever, a rear display screen and a control base. A power interface is installed on the front surface of the control base. A power button is installed on the upper surface of the control base, and an adjusting knob is installed above the power button. The support is installed on the upper surface of the control base. An upper connecting rod is installed above the left side of the support, and the power device is installed below the upper connecting rod. A radiator is installed in the power device, and a motor is installed below the radiator. The guide shaft lever is installed under the power device. A rotary shaft is installed in the guide shaft lever. Clamping plates are installed under the guide shaft lever. The guide shaft lever is connected with a front display screen and the rear display screen through the clamping plates. According to the agricultural technique popularization data storing and displaying device, since the surfaces of the clamping plates are each of a sawtooth clamping groove structure, the display screens can be clamped conveniently and rapidly, the situation that the display screens fall is avoided, and the safety of the device is improved.

The invention discloses a device used for punching a pipeline. The device comprises an upper die and a lower die. The lower die is provided with a first locating mechanism. The first locating mechanism comprises a base, a rear seat and an inserting and connecting bar, wherein the upper portion of the base is provided with a groove and a waste channel, and the inserting and connecting bar is placed in the groove. The inserting and connecting bar is provided with a punching groove through along the diameter. The lower die is provided with a waste storage space communicated with the waste channel. The pipeline is sleeved with the periphery of the inserting and connecting bar and arranged in the groove. The lower die is further provided with a second locating mechanism used for locating the rotated pipeline. The upper die is provided with a punching mechanism and a third locating mechanism used for pressing the pipeline. The punching mechanism is provided with a punching male die which corresponds to the punching groove in position and can be inserted into the punching groove through telescoping. The device can carry out punching by effectively and stably fixing the pipeline, after being rotated by the proper angle, the device carries out locating through the locating mechanisms, carries out secondary punching, and punches through holes in different positions, waste can be recovered conveniently, and the influence on finished products from the waste is reduced.

The invention relates to the technical field of financial management, in particular to financial voucher punching equipment with a positioning function. The financial voucher punching equipment comprises a workbench, wherein a plurality of positioning columns are fixedly mounted in the center of the top surface of the workbench, and two parallel shaft holes are formed in the top surface of the workbench and are close to the front side of the workbench; and two parallel fixing tables are fixedly connected to the edge of the rear side of the top face of the workbench. According to the financial voucher punching equipment with the positioning function, through the arrangement of a punching mechanism and a pressing mechanism, financial vouchers can be effectively and stably fixed, and accurate punching can be conveniently conducted on the financial vouchers under the action of the positioning columns and a positioning groove. According to the financial voucher punching equipment with the positioning function, through the arrangement of a scrap collecting mechanism, the situation that shredded paper scraps generated by punching are accumulated can be effectively avoided by the design, unnecessary cleaning work is reduced, and the workload of workers can be relieved.

The invention relates to the technical field of silicon wafer etching, and discloses a semiconductor silicon wafer etching device which comprises a box body, supporting legs are fixedly connected to the lower surface of the box body; a bearing groove is fixedly connected to the bottom of the front surface of the box body, locking devices are arranged on the left side and the right side of the front surface of the box body, and a circulating pump is fixedly connected to the upper surface of the box body; the output end of the circulating pump is sleeved with a flow dividing pipe, and a connecting hose is inserted into the outer side face of the flow dividing pipe. According to the semiconductor silicon wafer etching device, the first fixed block, the second circular shaft, the first transmission shaft, the second fixed block, the third circular shaft, the transmission rod and the motor are arranged, so the second transmission shaft can conveniently drive the spray head to spray and etcha semiconductor silicon wafer, and the processing time is shortened, so the etching liquid can be uniformly sprayed on the upper surface of the semiconductor silicon wafer, and the semiconductor silicon wafer can react more conveniently and is more convenient to use.

The invention discloses a vertical bicycle parking fixing device. The vertical bicycle parking fixing device comprises an arc-shaped supporting frame, a sliding curved bar is arranged on one side of the arc-shaped supporting frame, a first elastic member and a hand dial block are arranged on the sliding curved bar, and a clamping groove corresponding to the hand dial block is formed in the upper portion of the supporting frame; a trigger switch is rotatably arranged on the lower portion of the supporting frame, and the trigger switch is mounted on the supporting frame through a second elasticmember; in the initial state, the first elastic member and the second elastic member are both in a compressed state, and the first end of the trigger switch limits the position of the hand dial block.When a bicycle needs to be parked, tires of the bicycle are in contact with the trigger switch, the trigger switch is rotated and lifted to release the hand dial block, and the hand dial block movesup along the sliding curved bar under the action of the first elastic member to unlock; after the bicycle is parked, the hand dial block is manually dialed to reach a locked state of the hand dial block and the first end of the trigger switch again, so that the purpose of effectively and stably fixing the bicycle is achieved, and the shaking of the bicycle is avoided.

The invention provides an automobile glass breakdown detecting device mounted with a workpiece placing abnormal movement preventing mechanism. The device comprises a housing, racks, a clamping top plate, a movable clamping plate, a cylinder, a lower clamping plate, an inner top plate, a cylindrical groove, a ball stud, a weighing sensor, a test plate and a test pin; pull-type doors are disposed ontwo sides of the outer end of the housing; a guide rail groove is formed on the middle inner side of the housing, and a guide rod is fixedly disposed at the top of the guide rail groove by interference fit; a control device is fixedly disposed on one side of the housing by welding a pipe holder; and the racks are fixedly disposed on the bottom inner sides of the pull-type doors. The abnormal movement preventing mechanism can be laterally moved by providing the guide rail groove and the guide rod, which is beneficial to increasing the applicability of the breakdown detecting device to fix glass of different sizes. The pressure of the center of gravity of different glasses can be shared by adjustment. In addition, clamping teeth can cooperate with the racks to fix the position of the abnormal movement preventing mechanism stably and effectively.

The invention discloses a fixed dustproof type textile transporting device which comprises a device body, a transmission wheel, a brush and a side plate. A conveyor belt is installed inside the devicebody, a motor is arranged inside the conveyor belt, the transmission wheel is installed at the right side of the motor, a transmission rod is connected to the upper portion of the transmission wheel,an auxiliary belt is installed above the transmission rod, a rotating rod is placed at the inner side of the auxiliary belt, the brush is fixed to the outer side of the rotating rod, the side plate is installed at the left side of the conveyor belt, an air nozzle is placed above the side plate, a reset rod is installed at the outer side of the air nozzle, a fixing rod is placed above the conveyorbelt, a buckle is installed inside the fixing rod, and a dust removal fan is installed below the conveyor belt. According to the wheel type pulverized coal loading trailer, dust inside the device canbe collected through the dust removal fan, and the phenomenon that dust is accumulated inside the device is reduced.

The invention relates to auxiliary workpiece fixing equipment. The auxiliary workpiece fixing equipment is mainly composed of a fixing lateral plate, a fixing sliding block, a fixing bottom plate, an auxiliary rotary body, an auxiliary revolving body, a threaded rod, a conical hole, an auxiliary shaping block and an anti-skidding gasket body. The auxiliary workpiece fixing equipment has the characteristics of being easy to operate, convenient to use, reasonable in design and capable of more stably and effectively fixing a workpiece and having an anti-skidding function.

The invention discloses a method for mounting and rapidly and accurately positioning a main tower cable guide pipe of a cable-stayed bridge. The method comprises the following steps of S10, making a stiff skeleton segment and a positioning device and assembling the positioning device on the stiff skeleton segment; S20, preliminarily positioning a cable guide pipe on the stiff skeleton segment through the positioning device; S30, firmly welding the bottom of the positioned stiff skeleton segment and the top of a previous stiff skeleton segment of a main tower of the cable-stayed bridge; and S40, adjusting the cable guide pipe on the stiff skeleton segment through the positioning device, locking the positioning device and moving a saddle plate to stick to an outer wall plate of the lower part of the cable guide pipe; and fixedly welding the saddle plate and the stiff skeleton segment as well as the cable guide pipe and the saddle plate. According to the invention, the construction period can be prevented from being affected by twice separate lifting of the stiff skeleton segment and the cable guide pipe; the safety risks in aerial lifting operations are reduced; the construction difficulty of cable guide pipe positioning is reduced; the construction procedures are reduced; the working period is shortened; the construction operation is simple and convenient; the erection of a large working platform can be saved; and the construction period is shortened.

The invention discloses a mask plate replacing device and method. The mask plate replacing device comprises a substrate frame used for bearing a mask plate, an automatic locking mechanism which is arranged on the substrate frame and used for selectively locking or loosening the mask plate, and a supporting tray which is arranged below the substrate frame and used for lifting the mask plate. The substrate frame comprises a supporting tray hole, and the supporting tray can selectively enter and exit out of the supporting tray hole to lift up or put down the mask plate. According to the mask plate replacing device and method, the mask plate is arranged on the supporting tray through a clamping mechanism, the supporting tray is placed on the substrate frame, positioning of positioning pins reduces abrasion of the mask plate relative to fixing of threads, the automatic locking mechanism is stable and effective in fixing, and operation is convenient.

The invention discloses a grinding device and a grinding method for machine manufacturing. The grinding device comprises supporting legs and a lifting rod. The supporting legs are provided with a supporting plate. A vertical rod is arranged on one side of the supporting plate and provided with a support rod. The support rod is provided with a sliding groove. A pulley is arranged in the sliding groove and connected with a fixing frame through a connecting rod. The fixing frame is connected with a fixing block. A motor is arranged below the fixing block. A rotation rod is arranged below the motor. A grinding sheet is arranged below the rotation rod. A handle is arranged on the motor. The supporting plate is provided with an air inlet. The air inlet is connected with a dust collecting box through a draught fan. The lifting rod is provided with a hydraulic rod. The lifting rod is provided with a flat plate. The supporting plate is provided with a modulator tube. The grinding device for machine manufacturing is simple in structure and convenient to use, a grinding machine is provided with the handle, the grinding machine can be conveniently moved through the handle, and the air inlet isin an opened shape and can effectively suck dust.

The invention discloses a current magnetostrictive signal extraction sensor, which comprises a shell and a protective cover, the front surface of the shell is fixedly connected with the back surface of the protective cover, and the invention relates to the technical field of current signal extraction. According to the current magnetic signal extraction sensor, a magnetic rod is fixedly connected into the bobbin, and the surface of the bobbin is fixedly connected with a coil, wherein the wire diameter of the coil is 0.1 mm, the number of turns of the coil is 1500t, the inductive reactance of the coil is 30mH+ / -15%, the direct current impedance of the coil is 155ohm+ / -10%, the diameter of the magnetic rod is 10mm, the length of the magnetic rod is 30mm, and mu is equal to 1800+ / -25%. Variousparameters of the sensor coil provided in the scheme are utilized, when the sensor is close to a wire through which current flows, the magnetic field can generate induced voltage at the two ends of the sensor coil, and the form of the voltage and the form of the magnetic field show the same change rule, so that the sensor can effectively extract a magnetic field signal, and a basis is provided for subsequent analysis of the operation health condition of electric equipment.