316 results about "Electromagnetic lock" patented technology

The invention relates to the technical field of electrostatic protection, and discloses an electrostatic protection method and system for an electromagnetic lock, and the method comprises the steps: obtaining an electromagnetic lock signal sequence and tiny interference characteristics; obtaining an impact signal sequence and an impact characteristic parameter according to the electromagnetic lock signal sequence; obtaining a core interference fragment according to the impact signal sequence and the impact characteristic parameter; obtaining a time distribution characteristic according to the core interference fragment; obtaining a refining interference signal according to the time distribution characteristic and the core interference fragment; obtaining a risk level according to the refining interference signal; obtaining a stable output signal according to the risk level; and according to the stable output signal and the tiny interference characteristics, electromagnetic lock precise protection is carried out. The method can improve the anti-interference capability of the electromagnetic lock.

The invention relates to the technical field of injection molding production and manufacturing, and discloses an injection molding raw material feeding mistake-proofing verification system for a safety system airbag, which comprises a central verification server, an edge computing gateway, an intelligent hopper unit provided with an electromagnetic locking mechanism and a handheld intelligent terminal. The handheld terminal is used for collecting information, and the server verifies order matching and generates an unlocking instruction when the physical position identifiers are consistent and are in a preset time window. The system establishes a virtual session to lock the injection molding machine in a single-batch mode, and the product taking-out manipulator and the label printer are linked in real time through the interlocking control module according to the session state. The algorithm engine module calculates single-mode consumption based on screw metering parameters and melt PVT characteristics so as to invert real-time inventory, and pressure and speed characteristics in the glue injection process are extracted in combination with the rheological analysis module to generate rheological fingerprints for attribute verification. According to the invention, the space-time physical interlocking of the feeding authority, the whole-process batch anchoring and the online closed-loop monitoring of the physical attributes of the raw materials are realized.

The invention relates to the technical field of mold changing of injection molding machines, in particular to a rapid mold changing mechanism for injection molding machining and an injection molding machine thereof, and solves the problems that when an injection molding machine mold changing mechanism is used, a new mold can be installed only after an old mold is taken down and placed well, operation is inconvenient, mold positioning is generally not achieved when the mold is installed, and the mold changing efficiency is high. The injection molding machine comprises an injection molding machine mechanism, and two injection molding mold structures are arranged in the injection molding machine mechanism. Mechanical locking of the mold body is achieved by clamping the limiting insertion rods into the limiting grooves, meanwhile, the electromagnet is powered on, a magnetic conductive plate of the mold body is electromagnetically attracted through the electromagnet, electromagnetic locking of the mold body is achieved, the stability of the mold body is improved, and the service life of the mold body is prolonged. And the situation that the mold body is not mounted in place to cause mold slot positions during mold replacement is avoided.

The invention provides an automatic opening and closing drawer structure which comprises a cabinet body, an inner cavity is formed in the cabinet body, a drawer is arranged in the inner cavity in a drawable mode, a rack is arranged on one side of the drawer in the drawer drawing direction, a driving unit meshed with the rack to drive the drawer to be opened or closed is arranged in the drawer, and an electromagnetic lock is arranged on the rear side of the inner cavity. The front end of the rack is hinged to the interior of the inner cavity, a back plate of the cabinet body is provided with a sliding groove, the rear end of the rack is provided with an operation arm which penetrates through the sliding groove and extends to the outer side of the cabinet body, and the locking mechanism is connected with the operation arm. The operating arm is detachably installed on the back plate of the cabinet body and at the rear end of the fixed rack, a pressing rod is arranged in the operating arm and used for pressing a shifting rod of the electromagnetic lock to release the locking state of the electromagnetic lock, and when the drawer needs to be opened emergently, the locking mechanism is detached, the operating arm is pressed, the gear is disengaged from the rack, and the locking state of the electromagnetic lock is released.

The utility model discloses a partial discharge on-line comprehensive monitoring device comprising a device main body, a monitoring host is positioned at a rear position in the device main body, and the monitoring host is provided with a short circuit grounding sensor, a high voltage live sensor, a locking alarm mechanism, an antenna, a grounding wire, a communicator and a working power supply. The high-voltage electrified sensor is connected with a coupling sensor, a coaxial line is connected between the high-voltage electrified sensor and the coupling sensor, the locking alarm mechanism is connected with a power supply input port, an electromagnetic lock and an alarm signal output interface, and the communicator is connected with a shielding line. According to the partial discharge on-line integrated monitoring device of the utility model, a high-voltage sensor matched with an original live display of a ring main unit is used as a front coupling sensor of a pulse partial discharge integrated monitoring instrument, so that partial discharge signals can be rapidly captured, partial discharge types can be accurately analyzed, and partial discharge positions can be accurately positioned.

According to the translation rotating type folding and unfolding locking mechanism suitable for the folding wing, the folding and unfolding mechanism and the locking mechanism are provided, the folding and unfolding mechanism is installed on a fixed wing, and the folding wing is driven to be folded and unfolded relative to the fixed wing; the locking mechanism is used for relatively locking the position between the folding wing and the fixed wing; the folding and unfolding mechanism comprises a servo motor, a telescopic rod, a linear sliding rail, a supporting sliding block, a rotating shaft, a semi-U-shaped sliding groove support, a gear reducer and an electromagnetic lock. Optical shafts of the rotating shafts penetrate through inner holes of the supporting sliding blocks, and one ends are connected with flanges to be fixedly connected with folding wings; the V-shaped bearing at the other end is connected with the semi-U-shaped sliding groove of the semi-U-shaped sliding groove support in an embedded mode, the V-shaped bearing slides in the semi-U-shaped sliding groove support in a limited mode, rotation and sliding of the rotating shaft are implemented, and the folding wings are driven to be unfolded or folded. The folding wings are pushed to slide and rotate along the curved surface sliding grooves in a linear driving mode, two sequential actions of translation and rotation of the folding wings are achieved, and the folding and unfolding actions are coherent.

The utility model discloses a novel electromagnetic lock mounting plate, including lock head, mounting plate and install the relay plate on the mounting plate, the first screw rod is fixed with symmetry to the side of mounting plate close to lock head, and the inside symmetry of relay plate is provided with the installation slot, and the inside of installation slot is equipped with the adjusting assembly of cooperation with the first screw rod, adjusting assembly includes the second screw rod of fixedly being equipped with the symmetry on the side wall of installation slot, the first connecting plate of being located the inside of installation slot and the second connecting plate of fixedly being equipped with the end of first connecting plate, the inside of first connecting plate and second connecting plate all are provided with rectangular groove, and the nut of end screw thread connection has the nut of end screw thread connection also, the second screw rod is moved in the rectangular groove of second connecting plate and the end is also screw thread connection has the nut. Through above -mentioned structure, the relay plate of fine adjustment mechanism is convenient for position adjustment when the door fan deformation to better with lock head contact, avoided the trouble that needs to reinstallation, and the practicality is strong.

This specification provides a wafer cassette docking system that, through the systematic integration of local environmental control, multimodal sensing, and active compliant adjustment functions, achieves an overall performance improvement in the wafer cassette docking process. It can form a stable positive pressure laminar flow air curtain at the initial stage of docking, effectively isolating external particles and providing a continuous ultra-clean environment for the wafer. Employing a multi-sensor fusion scheme consisting of global vision, laser ranging, and feature recognition, it can quickly and comprehensively acquire the six-degree-of-freedom pose information of the wafer cassette, providing a high-precision data foundation for subsequent fine alignment. A micro-motion adjustment platform based on piezoelectric ceramic actuators, combined with real-time closed-loop feedback control, enables nanometer-level active compliant alignment, significantly improving alignment accuracy and reliability. An electromagnetic locking mechanism ensures the stable maintenance of the final pose. The collaborative work of each module improves docking accuracy and efficiency, and also enhances the system's adaptability and stability under different operating conditions.

The invention provides an anti-electric-shock and dustproof low-voltage branch box, and relates to the technical field of low-voltage power distribution equipment, the anti-electric-shock and dustproof low-voltage branch box comprises a box body, a box door and a box cover, the box body comprises an outer-layer insulation shell, an inner-layer insulation shell and an interlayer, and the interior of the box body is divided into a branch box main body cavity, an electrical isolation cavity, a heat dissipation and dust removal channel and an independent wire duct cavity; a wiring terminal set, an insulation positioning frame, an adjustable supporting column, an electric leakage detection module and a grounding terminal are fixed in the branch box body cavity, a power controller and an airflow dustproof assembly are arranged in the electrical isolation cavity, the upper end and the lower end of the heat dissipation and dust removal channel correspond to the airflow dustproof assembly and the diversion opening and closing mechanism, and the box door is provided with an electromagnetic lock and a wire groove plugging plate. The beneficial effects of the invention are that the double-layer insulation structure is combined with the electric leakage detection module to realize linkage of electric leakage, power failure and door locking, so that the anti-electric shock safety is improved; through the sealing design of the active airflow barrier and the multi-stage filter screen, the synergistic interaction of dust prevention and heat dissipation is realized, the maintenance cost is reduced by a modularized convenient structure, and the reliability and the practicability are greatly improved.

The utility model provides an anti-theft wattmeter box, which belongs to the technical field of wattmeter boxes and comprises an electric energy metering mechanism. Comprising a first supporting shell, a first box body fixedly installed in an inner cavity of the first supporting shell, an anti-theft assembly arranged on the outer side of the first box body, a lock seat fixedly installed on the outer side of the first box body and a second supporting shell fixedly installed on the outer side of the first supporting shell. Basic protection is formed through a double-layer box body nesting structure, and a physical barrier is formed by matching with a shielding piece and a shell sleeve of the anti-theft assembly; the warning mechanism adopts a double-trigger mode of a mechanical baffle and an electronic pressure sensor, so as to realize instant alarm when the door is opened abnormally; the intelligent linkage locking function of the electromagnetic lock cylinder is combined with the cable protection design of the guide raised line, so that the whole structure has damage resistance, quick response and use convenience, the problem that a traditional electric meter box is easy to damage and steal electricity is effectively solved, and the safety protection level of electric power facilities is remarkably improved.

The invention provides a rescue docking device, method and system for a safety door of an inclined elevator car, relates to the field of elevator rescue, and solves the technical problems that in the prior art, the rescue mode for passengers in a fault inclined elevator is relatively tedious, and the safety still exists. According to the method, a lift car and a fixing support fixed to the lift car are included, a foldable guardrail gap bridge mechanism is installed on the lift car, the guardrail gap bridge mechanism is limited through a cable-stayed steel wire rope arranged on the fixing support, and a setting electromagnetic lock and a butt joint electromagnetic lock are arranged on the guardrail gap bridge mechanism. The method and the device are used in the process of rescuing passengers in the inclined ladder when the inclined ladder breaks down. When a fault occurs in oblique movement, rescue is achieved by controlling the adjacent oblique movement ladders to be aligned with the faulted oblique movement ladder, and after the two guardrail gap bridge mechanisms are aligned, the gap bridge bottom plate can provide enough support, and compared with a ladder stand mode, the situation of step missing is avoided.

The application relates to a modular magnetic reconfiguration parallel robot joint system for on-orbit autonomous assembly of a spacecraft, and belongs to the technical field of space equipment. The system is aimed at solving the problems of poor flexibility, low reconfiguration efficiency, difficulty in balancing high precision and high stiffness, and low reliability of existing space parallel robots. The technical scheme comprises a Halbach array magnetic ball and an electromagnetic locking ring of a magnetic joint module, a carbon fiber telescopic connecting rod micro servo motor and a harmonic reducer of a distributed drive branch chain, a multi-sensor data fusion unit configuration optimization algorithm module and a real-time control unit of an intelligent control system. The system can realize rapid joint mode switching, improve task response and execution efficiency, autonomously switch between precision mode and high stiffness mode to meet different operation scene requirements, adopt non-contact magnetic transmission to avoid friction and wear and pollution, improve system service life and reliability, and realize modular design for convenient maintenance and upgrading.

The application discloses a small generator and relates to the technical field of generators.The generator comprises a shell, double-end heat dissipation ventilation holes, a shieldable permanent magnet rotor and a temperature control and torque limiting protection assembly.A groove on the outer periphery of the rotor and an embedded paddle build through air flow when rotating, so that self-driven heat dissipation is realized.The temperature rise of a coil triggers a triode driven protection electromagnet through a thermistor, the torque transmission of a toothed disc friction coupling is adjusted, continuous derating is realized, and the generator can be stopped until zero coupling.The permanent magnet adjusting assembly is combined with an electromagnetic locking mechanism through an iron shell body-aluminum strip-permanent magnet combination, the magnetic field output is quickly cut off, and no induced voltage is generated during maintenance.

The utility model discloses a mechanical structure for automatically forcibly opening a vehicle door, which relates to the technical field of vehicle-mounted machinery and comprises a vehicle door plate, one side of the vehicle door plate is connected to the side wall of an A-pillar mounting plate, and a mechanical mechanism for forcibly opening the vehicle door plate is fixedly arranged on one side of the A-pillar mounting plate and is used for forcibly damaging an electromagnetic lock in the vehicle door plate. The forced door opening mechanical mechanism comprises a servo motor and a transmission shaft, an output shaft of the servo motor is fixedly connected with the transmission shaft through a coupler, one end of the transmission shaft is fixedly connected with a worm, and the servo motor is fixedly connected to the A column mounting plate through a motor fixing base. A bearing seat is fixedly installed on one side of the A column installation plate, one end of the worm penetrates through and is rotationally installed in the bearing seat, the device recognizes a vehicle accident through a mechanical system circuit or a detection sensor, a transmission mechanism is driven by an automatic motor, the connecting position of the electromagnetic lock is forcibly damaged, and safety is improved.

The utility model relates to the technical field of intelligent locks, in particular to an NFC (Near Field Communication) intelligent lock applied to an intelligent power plant management and control integrated system, which comprises an electromagnetic lock, one side of the electromagnetic lock is connected with a power supply, one end of the electromagnetic lock is connected with an MOS (Metal Oxide Semiconductor) tube, one side of the MOS tube is connected with an induction piece, and the other side of the MOS tube is connected with the power supply; the outer side of the lock frame is wrapped with a fixing piece, and a fixing screw is arranged on the surface of the fixing piece; the door lock has the advantages that the NFC component is close to the sensing area of the door, the sensing piece in the sensing area receives signals and transmits the signals to the MOS tube, the MOS tube opens a circuit for circulation after receiving the signals, the power source drives the electromagnetic lock to open the door, the protruding sensing piece on the surface of the lock frame can be installed in the sensing area where the door is needed in the installation process before use, and therefore the door can be opened. The whole lock is fixed to the specified position through the fixing piece and the fixing screw, the lock and the fixing piece are divided into two modules, the lock can be easily detached from the fixing piece, and therefore the problem that the lock is difficult to maintain in the later period is solved.

The utility model provides a buckle-type electromagnetic lock which comprises a lock shell, a first electromagnetic lock body and a second electromagnetic lock body. The first surface and / or the second surface are / is connected with the fixing structure, the fixing structure comprises a buckle, the buckle is provided with a clamping groove with an opening in the lower side, and the clamping groove can be connected to a cabinet body in a clamped mode. According to the buckle type electromagnetic lock, the electromagnetic lock can be rapidly disassembled and assembled, and the efficiency of installation, disassembly and maintenance is improved.

A device management system, method and apparatus are disclosed. The device management method comprises: sending, in response to a borrow and return request, an unlocking instruction to an electromagnetic lock configured for a device management cabinet, wherein the electromagnetic lock unlocks the device management cabinet in response to the unlocking instruction; receiving charging state information of a target device storage unit that is returned by the device management cabinet, wherein said device is stored in the target device storage unit; receiving lock state data of the device management cabinet that is sent by the electromagnetic lock, and acquiring electric quantity state information of said device; and generating, according to the charging state information, the electric quantity state information and the lock state data, borrow and return information of said device.

The utility model relates to a door lock system for low temperature preservation box and contain its low temperature preservation box belongs to low temperature preservation equipment technical field, that door lock system includes rotary handle lock, electromagnetic lock and controller, rotary handle lock includes lock core, handle installation subassembly, handle and position monitoring subassembly, handle includes rotary lock and handle part, and rotary lock is connected in handle installation subassembly to rotate between first position and second position, when rotary lock is located first position, rotary lock and lock core lock, when rotary lock is located second position, rotary lock and lock core are separated, position monitoring subassembly is used for monitoring whether rotary lock is located first position, controller and position monitoring subassembly and electromagnetic lock are connected communication respectively, to control electromagnetic lock to open the lock when monitoring that rotary lock is no longer located first position. The door lock system adopts rotary handle and electromagnetic lock linkage control, only needs to rotate handle when opening the door, and the operation is simple and convenient.

The utility model relates to a kind of automatic getting-on and getting-off machine dog unmanned vehicle, comprising: carriage and vehicle body;Carriage is located on vehicle body, and carriage and vehicle body are integrated structure;First laser radar is equipped in the top of vehicle body front end;The lateral wall of carriage is hinged with car side door;Carriage tail is hinged with car tail door, and ladder is installed on car tail door;Machine dog is placed in the carriage.The utility model has the beneficial effect that: ladder is set in car tail door, so that machine dog enters and exits unmanned vehicle, avoids machine dog to skid when entering and exiting unmanned vehicle;The height of each level of ladder and the ground clearance of last level and the walking height of machine dog are matched, to prevent machine dog from climbing and falling;When unmanned vehicle is driving, car tail door is locked in the tail of vehicle by electromagnetic lock;Limit switch is arranged on the tail, and the limit switch is provided with telescopic structure, when the extended part is completely retracted into the limit switch, electromagnetic lock is completely locked;Through electromagnetic lock and limit switch, car tail door is firmly locked in the tail.

The utility model discloses an anti-knocking electromagnetic lock, which solves the problem that the electromagnetic lock is knocked to unlock, and comprises a lock shell, and a spring bolt, an elastic piece, a deflector rod, a rotating shaft, a spring, a cylindrical pin and an electromagnet which are arranged in the lock shell, the lock shell is provided with an opening movably matched with the lock hook; the spring bolt is rotationally matched with the opening, and the first end of the spring bolt is used for locking the latch hook; the elastic piece is arranged opposite to the spring bolt and used for driving the spring bolt to rotate in the unlocking direction; the shifting rod is rotationally matched in the lock shell, and the first end of the shifting rod movably abuts against the second end of the spring bolt to limit unlocking; the rotating shaft is rotationally matched in the lock shell and is opposite to the second end of the deflector rod, and a first groove is formed in the circumferential surface of the rotating shaft; the spring and the cylindrical pin are sequentially embedded into the second end of the deflector rod, and the cylindrical pin is embedded into the first groove under the action of the spring so that the rotating shaft can be linked with the deflector rod; the output end of the electromagnet is in transmission connection with the rotating shaft to drive the rotating shaft to rotate.

The utility model belongs to the technical field of electromagnets, and particularly relates to a coin-inserting control switch electromagnetic lock, which comprises a shell, a coin-inserting control switch and a coil-inserting control switch, the coil assembly is arranged in the containing cavity, and a static iron core and a movable iron core are arranged in the coil assembly; the shell is provided with a reset assembly used for resetting the movable iron core. Two mounting holes are formed in the same side wall of the shell, and a straight line formed by connecting the circle centers of the two mounting holes is parallel to the moving path of the movable iron core; the same side wall of the shell is provided with the two mounting holes, and the straight line formed by the connecting line of the circle centers of the two holes is just parallel to the moving path of the movable iron core, so that the design ensures that the moving path of the movable iron core can be accurately aligned when the electromagnet is mounted; therefore, misoperation and abnormal triggering conditions caused by tiny deviation of the installation position are avoided, the overall use effect of the electromagnetic lock is improved, and the efficient and safe performance of the electromagnetic lock in various application scenes is ensured.

This safety lock mechanism comprises: a mechanical-lock-type electromagnetic lock switch configured to perform an operation for returning to an original position upon sensing that a lock remains released, the electromagnetic lock switch inserting an operation key fixed to an opening / closing door into a key insertion opening in a switch body fixed to a support-member side, thereby locking the closed opening / closing door by restricting the operation key from falling out; a lock release operation means for operating a lock release means that releases the lock of the operation key within the switch body when not energized; and a stopper member that prevents the full closing of the opening / closing door in conjunction with the lock release operation performed by the lock release operation means.

The utility model relates to the technical field of air windows, and discloses a mining air window which comprises a window frame, a rotating door movably connected in the window frame in a sleeved mode, a PLC fixedly installed on one side of the window frame, and a door closing assembly arranged on one side of the window frame and used for closing the rotating door. Through mutual cooperative use of the window frame, the revolving door, the limiting frame, the moving plate, the push-pull electromagnet and the limiting groove, the effect of closing the revolving door is achieved, when reverse airflow (such as gas outburst shock waves) occurs, the revolving door can be quickly pushed to be closed through external force, the situation that the revolving door is difficult to respond quickly due to blockage and the like is avoided, and the service life of the revolving door is prolonged. Meanwhile, under the normal condition, the electromagnetic lock switch is controlled by collecting the air pressure difference between the windward side and the leeward side, a user does not need to manually open the rotating door, ventilation is conducted in time, use is convenient, and practicability is achieved.

The application relates to the technical field of valve body flange machining, and discloses a valve body flange drilling and tapping integrated equipment, which comprises a support, a protective cover mounted above the support and an XY-axis moving platform mounted in the protective cover. The vertical drilling, transverse drilling, tapping, overturning, chip cleaning, slag cleaning and cutter cleaning processes are integrated in one equipment, the multi-surface and multi-type hole machining of the valve body is completed at one time in the protective cover, the through hole end of the valve body is positioned through interference fit of the limiting column, the positioning disc, the servo motor drive and the electromagnetic lock are matched to realize indexing positioning, the valve body always keeps the same axis during rotation and subsequent shaft positioning overturning, the valve body can be automatically grabbed and accurately overturned by 180 degrees through the overturning mechanism, the through hole at the other end of the valve body can be accurately sleeved on the limiting column again through overturning, the through holes at the two ends are ensured to be drilled on the same straight line, and the positioning error problem caused by manual overturning is solved.

The utility model relates to a portable low-voltage grounding wire clamp in the technical field of electric power tools, which comprises an insulating rod, a metal probe, an upper metal clamping piece, a lower metal clamping piece, an electromagnetic locking device and an audible and visual alarm. Or the grounding lead is conducted with the ground through the upper and lower metal clamps; when the to-be-detected conductor is electrified, the audible and visual alarm gives an audible and visual alarm, and the electromagnetic locking device locks the insulating rod, so that an accident that the to-be-detected conductor is electrified to hang a ground wire is avoided; if the to-be-tested conductor is not electrified, the electromagnetic locking device is opened, the upper and lower metal clamping pieces clamp the to-be-tested conductor under the action of the spring, and conductor grounding is realized. The grounding wire clamp has the functions of live-line sound-light alarm and live-line locking, solves the problem that the conventional grounding wire clamp lacks the functions of warning and locking when being in contact with a live-line conductor, is simple in structure, convenient to operate and high in safety, and reliably guarantees the safety of operators and equipment.

The utility model relates to the technical field of liquid transportation equipment, and discloses a tank truck filling device with an anti-splashing function, which comprises a base and a mounting rack, a driving motor is mounted at the rear part of the upper end of the base, and a liquid pump is mounted at the front end of the driving motor through a coupler; an oil outlet groove is formed in the front end of the oil outlet pipe, a sealing cover is hinged to the right portion of the upper end of the oil outlet groove, three electromagnetic locks are arranged on the left side wall of the oil outlet groove, three iron plates are arranged on the left side wall of the sealing cover, and the iron plates and the electromagnetic locks are arranged at the corresponding positions. According to the device, the mounting frame is mounted on the tank car, two second locking bolts are tightened, the position of the mounting frame is fixed, the height of the sliding rod is adjusted up and down, a first locking bolt is tightened, the position of the sliding rod is fixed, a rotating motor is started, the rotating motor drives a limiting ring to rotate, and an oil outlet pipe is driven to rotate; operators are prevented from holding the oil outlet pipe all the time for operation, and the labor cost is reduced.

This invention provides an electromagnetic lock module for an aircraft cockpit door with power-off reset and anti-blocking functions, belonging to the field of aircraft avionics system technology. It includes a base, housing, door locking mechanism, stepper motor assembly, control circuit board, and status detection module. The door locking mechanism includes an anti-blocking hook assembly and a locking pin assembly. The stepper motor assembly is energized only momentarily during action, driving the locking pin to move and achieve locking and unlocking, solving the problems of overheating, high energy consumption, and short lifespan caused by continuous power supply in traditional electromagnetic locks. The module integrates multiple detections, including locking pin position and door position, for real-time status monitoring. A specially designed anti-blocking transmission mechanism allows for separation and automatic reset when the locking pin is jammed, preventing damage. The module has an automatic release function upon power failure, ensuring reliability for emergency evacuation. This invention features a robust structure, high fault tolerance, and meets aviation standard requirements.

The invention discloses an unmanned selling refrigerator door lock control device and method, and relates to the technical field of electromagnetic locks, the unmanned selling refrigerator door lock control device comprises a door lock, the door lock comprises a mounting seat and a housing, the surface of the housing is provided with a bolt hole, the side wall of the housing is provided with a lock hook channel, and the housing is internally provided with a switch assembly and an energy-saving assembly. An electromagnetic push rod is controlled to be electrified to move a movable seat, a lock hook at the top of the movable seat performs self-locking on a lock hook groove of a cabinet door, the electromagnetic push rod is powered off after self-locking is completed, a limiting spring is limited through a permanent magnet, meanwhile, a copper sheet is arranged at the end of the electromagnetic push rod, the penetrating power of the magnet is increased, and the lock hook is kept in a self-locking state; and when the lock hook enters or extends out of the housing to achieve opening and closing of the door lock, the electromagnetic push rod does not need to be continuously powered on, and therefore the service life of the door lock is prolonged.

Embodiments of the present disclosure disclose an interface test and electromagnetic lock replacement method, device, electronic equipment and readable medium. A specific embodiment of the method comprises: generating an atomized interface configuration file sequence corresponding to test request information; loading an environment variable pool from a preset storage; sequentially for each atomized interface configuration file in the atomized interface configuration file sequence, performing the following test steps: injecting the environment variable pool and the operation configuration parameter information in the atomized interface configuration file into the execution context of an external test script file; updating the current environment variable pool; initiating an operation request to the electromagnetic lock of the cabinet access control equipment; in response to determining that each interface test data generated indicates that the lock control operation test fails, controlling the relay and lock replacement mechanical arm on the cabinet access control equipment to replace the electromagnetic lock with a backup electromagnetic lock. This embodiment reduces the number of times the cabinet door cannot be normally opened or closed or the electromagnetic lock is replaced by mistake.

This invention provides a caisson for a silty riverbed, comprising: an outer caisson; and an inner caisson, at least partially located within the outer caisson, the inner and outer caissons being slidably connected in a first direction; and an electromagnetic locking mechanism, including a horizontal plate extending and retracting within the inner caisson in a second direction. When the electromagnetic locking mechanism is energized, the horizontal plate extends out of the inner caisson in the second direction and inserts into the external silt, thereby increasing the contact area between the caisson and the silt on the horizontal surface. This invention includes an electromagnetic locking mechanism; by energizing it, the electromagnetic locking mechanism moves the horizontal plate, inserting it into the silt. This increases the contact area between the device and the silt on the horizontal surface, preventing the caisson from swaying, tilting, or moving after sinking into the silt, thus ensuring the stability of the caisson.