49 results about "Trap door" patented technology

A landing pad receives and stores packages delivered from an aerial vehicle or awaiting pickup from an aerial vehicle. The landing pad can be placed outside of a window and can contain a transmitter for sending out an identification signal via radio frequency to aid aerial vehicles in finding the landing pad. The landing pad contains a landing platform with a trapdoor that leads to a storage compartment. The trapdoor can be configured to only open when it receives a signal from an authorized aerial vehicle. The storage compartment can be accessed via a storage compartment door which can contain a locking mechanism. The storage compartment can be climate controlled. The landing pad can also have a transmitter that emits sounds to discourage animals from nesting on or near the landing pad. The landing pad can also include a solar power generator as a source of electrical energy.

A drive thru EV battery swap station comprising a drive in facility, a roller conveyor belt, mechanical wedges and a trap door mechanism to allow for precise vehicle positioning and to reveal a robotic interface tray. The robotic arm and interface tray operate in coordination to remove the battery from the vehicle and replace with a fully charged battery. Also claimed is a method of extracting the battery, placing it into a battery storage and charging facility, and the robotic arm positions the new battery into the electric vehicle. The swap station communicates with the robotic arm and selects a fully charged battery. Also claimed is the battery swapping process taking no longer than five minutes, and a battery subscription model. The battery swap station has network capability via a dedicated mobile application or the vehicle control panel. Also claimed is a method of protecting the swapping station from unauthorised use with encryption protocols and monitoring.

A package theft prevention system comprising a mailbox defining an irregularly shaped interior compartment for storage of received packages. The lower portion of the mailbox has an outward, distally tapering wall for anchoring to concrete it is embedded in. The uppermost opening to the mailbox has a package door biased in the closed condition, where, just downward of the package door is a self-closing trap door biased in its closed position. As the package door and the trap door are offset and open in opposing directions, removal of packages from the upper opening is frustrated while receipt by the deliverer is facilitated. A lockable rear door below the upper opening provides access to the interior compartment for the owner.

A burrowing animal trap is provided and is designed to enclose the entrance to a burrow and appear to the animal as an extension of the burrow. As a result, the animal will be likely to enter the animal trap under the mistaken belief that it is exiting the burrow. The burrowing animal trap has a capture mechanism that includes a pivoting trap door.

The invention discloses a password-based train control system data secure transmission method and a password-based train control system data secure transmission system. The system is used for data transmission between a train control data owner and a train control data user, and comprises an identity authentication module deployed on a key management center, a data encryption module and a data uploading module which are deployed on the train control data owner, and a data storage module and a ciphertext search module which are deployed on a train control center, the trap door generation module and the data decryption module are deployed on a train control data user. According to the method, a password-based key derivation mechanism is adopted, and bilinear mapping and a hash function are combined, so that the complexity of key management in the train control system and the user operation burden are remarkably reduced, meanwhile, the confidentiality and integrity of train control data transmission are guaranteed, the bottleneck that efficient query cannot be performed after encryption in a traditional encryption method is solved, and the encryption efficiency is improved. And the comprehensive performance of the train control system in the aspects of data security and real-time performance is improved.

The invention discloses a medical image encryption method based on a trap door network and a diffusion model, and relates to the technical field of image encryption. The method comprises the following steps: encrypting a focus image scanned by medical equipment of a patient by using a session key through key negotiation between the patient and a doctor, and sending the encrypted image to an image filing and communication server; and when the doctor needs to look up the lesion image, decrypting the ciphertext image through the previously established session key, and recovering the corresponding original lesion image. The image encryption / decryption network of the invention is composed of a Diffusion model and a trap door network. The trap door network enhances the security of the medical image encryption method, and the forward generation and sampling process based on the Diffusion model ensures the security of the encrypted image and the high-quality reconstruction effect of the decrypted image.

This game table (1) comprises a hexagonal platform (2), a base (3) supporting said platform (2) substantially parallel to the ground, a plurality of pucks (9), said platform (2) being divided into six trapezoidal quadrants separated by six longitudinal members (12) and forming six consecutive boards (8) joined end to end, the table (1) further comprising a central receptacle (14) around which the boards (8) are arranged, which is formed of six walls (20), each wall (20) interfacing the interior of the central receptacle (14) and only one of the boards (8) and comprising a passage (22) connecting said board (8) with the interior of the central receptacle (14), the table (1) further comprising an elastic band (10) per board (8) stretched parallel to an edge of said board (8). Figure for the abbreviation: Fig 1

The invention discloses an access control encryption and decryption method and system based on content detection, and belongs to the technical field of cryptography, and the method comprises the following steps: initializing a global parameter and a main private key by an access control strategy and a security parameter input by a central authority, and generating a trap door; and sending the main private key to a sender authority to generate an encryption key for the sender. And the sender encrypts the information by using the encryption key, and then sends a ciphertext to the purifier. And the purifier purifies the ciphertext, and broadcasts the purified ciphertext to all receivers. Except a sender and a receiver which conform to an access control strategy, corresponding information cannot be transmitted and received through the method. According to the scheme, through cooperation and cooperation of all participants, on the basis of ensuring sensitive information supervision efficiency, encrypted transmission and identity verification of user information are achieved, sensitive information and identity information privacy of users are fully protected, and therefore the technical problem that in the prior art, a stealing risk exists in sensitive information transmission and storage is solved.

This invention discloses a door lock coordination method and system for emergency rescue. The method includes: triggering all door locks in the building to enter rescue mode and activating voice monitoring; based on the trapped person's response via a smart terminal, the door lock of the trapped room sends a rescue call reply message; based on the event that the neighboring door lock of the door where the rescuer is located receives the reply message, triggering the router to establish a filtering and forwarding binding; the neighboring door lock decides whether to become a relay door lock based on location relationship and broadcasts guidance voice; based on the event that the rescuer arrives at the relay door lock and is detected by its RFID, the door lock releases its own filtering binding; the neighboring door lock at the rescuer's new location sends an extended IGMP join message to establish a new binding; based on the event that the relay door lock determines that the trapped door lock is its direct neighbor, guiding the rescuer directly to the target room. Using this embodiment of the invention, decentralized, adaptive personnel positioning and relay guidance can be achieved, improving the real-time performance and reliability of emergency rescue.

An automated system for singulating and dispensing an object from a bunch of objects comprises: a hopper adapted to hold the bunch of objects; a rotating drum arranged adjacent the hopper and comprising at least one cutout to pick up one object at a time from the bunch of objects in the hopper; a funnel arranged on an opposing side of the drum to the hopper, wherein the drum is operable to transfer one of the objects at a time from the hopper to the funnel; and a trapdoor assembly at the base of the funnel comprising a first closed configuration for staging the object, and a second open configuration for transferring the object to a processing area for further processing. Computer and electronics are programmed and operable to control the modules. Related methods are described.

A server door assembly including at least one side mounting panel, a pivoting door disposed coupled to the at least one side mounting panel, wherein the pivoting door includes a first door component coupled to a pivot point of the side mounting panel, and a second door component configured to slide along the first component as the first component pivots about the pivot point.

The utility model discloses a movable outdoor mouse trapping device, which belongs to the technical field of mouse trapping, and comprises a cage body mechanism and a movable plate door mechanism, the bottom end of the cage body mechanism is provided with a bearing mechanism for collecting mouse excrement and urine in a sliding manner, and the movable plate door mechanism is arranged on the cage body mechanism. A trapdoor mechanism used for preventing rats from escaping is fixed to the inner side of the cage body mechanism. Through the arrangement of the cage body mechanism, the bearing mechanism and the movable plate door mechanism, the device can continuously trap mice, effectively prevents the mice from escaping, can collect urine and excrement of the mice and prevents the environment from being polluted by the excrement and the urine of the trapped mice, and through the arrangement of the bait mechanism and the bait pressing mechanism, the device can be used for continuously trapping the mice. According to the mouse trapping device, the mouse and the bait are isolated while it is guaranteed that the smell of the bait can be normally emitted, so that the trapped mouse is prevented from eating the bait, the bait can be rolled, and the strong smell can be released through a small amount of bait.

The invention designs a forward and backward security searchable encryption method and system supporting access authorization. Comprising the steps that when a data owner uploads data, an access control strategy of the data is uploaded at the same time, and the autonomy of a user to the data is improved; before a data user retrieves the data, an access control authorization link is added, fine-grained access control of the encrypted data is achieved, and the practicability and the safety of ciphertext data retrieval are improved; a probabilistic trap door generation algorithm is designed, random numbers are added into trap door information, so that different trap doors are generated in each retrieval, and off-line keyword guessing attacks are resisted; based on a puncturable encryption primitive, an entry is operated to add a label, and a ciphertext with a specific label is deleted by updating a key, so that backward security is realized; and an updatable encryption technology is introduced, and a client key and an encryption database are updated according to an updating strategy, so that the security risk caused by key damage is avoided, and the security of the searchable encryption method is further improved.

An assembly and method of forming a dispenser assembly that is constructed to sequentially dispense respective container lids from a stack of container lids housed in the dispenser assembly. The dispenser assembly includes a housing that is generally defined by a base, a cover, a top, and a lid. A guide tube depends from the top and generally overlies a trap door that is operationally connected to an actuator assembly and a drive assembly. A separator assembly is connected to the drive assembly and operative to effectuate separation of discrete lids from an end of the stack of lids during operation of the trap door during each dispense event.

A mechanical elevator safety system (100) with pulley-operated trapdoors, comprising: a plurality of trapdoors installed at respective floors within the elevator shaft, each trapdoor configured to cover the opening of the elevator shaft at its respective floor when in the closed position; a pulley system mechanically connected to an elevator car and each of the trapdoors; where the vertical movement of the elevator car activates the pulley system to open the trapdoor on the destination floor before the elevator arrives, and the trapdoor closes automatically as soon as the elevator departs.

The invention discloses an anti-quantum traceable anonymous authentication method and system for a mobile internet of things, and belongs to the technical field of identity authentication and tracking. The method comprises an initialization stage, a mobile Internet of Things equipment registration stage, a mobile Internet of Things equipment authentication stage and a mobile Internet of Things equipment tracking and revocation stage. Bidirectional authentication and session key negotiation between an edge node and equipment are realized by utilizing a lattice-based chameleon hash and a short integer solution problem, quantum computing attacks are resisted, and meanwhile, the equipment identity and path privacy are protected through block chain evidence storage and a chameleon hash trap door technology, and the security of the equipment is improved. And on-demand accurate tracing and rapid revocation of malicious equipment by a law enforcement agency can be supported, and the requirements of safety, privacy and supervision in a mobile Internet of Things scene are met.

A device for extracting food from a tank of an animal feeder where it is designed to be fastened. The device includes an opening, which in turn includes a frame, formed by a U-shaped sheet that has a hole located in each wing of the U-shape, and a food extracting mechanism that is fastened to the frame with the ability to rotate. The food extracting mechanism includes a trap door joined to a tube to house a shaft that is fastened to the frame through the holes.

The invention relates to a wall-hung toilet installation (1) comprising: - a frame (2) coupled to a supporting structure, and located behind a wall (10); - a toilet bowl (3) located in front of the wall (10) and suspended from the frame (2) through the wall (10); - a water tank (4) mounted on the frame; - a filling system (5) and a flushing mechanism (6) mounted behind the wall (10), the installation (1) comprising at least one hatch (7) provided in the wall (10) for accessing connection means (52) of the filling system (5) and coupling means (61) of the flushing mechanism (6), located outside the tank (4).

The invention discloses a lattice-based anti-quantum trap door random permutation function construction method, and belongs to the technical field of public key cryptographic algorithm design, and the method comprises the steps: S1, selecting parameters meeting requirements according to actual demands; s2, selecting an auxiliary function according to the selected parameters; S3, generating a permutation function defined on the auxiliary function; s4, trap door inversion operation is carried out on the replacement function value output in the step S3, and a trap door random replacement function is obtained; according to the lattice-based anti-quantum trap door random permutation function construction method provided by the invention, the unidirectivity and collision resistance of the function are established on the difficulty of the lattice problem, so that the function is provided with the capability of resisting the attack of a quantum computer, and the potential safety hazard of the existing trap door permutation function in the post-quantum era is solved.

The invention discloses a digital signature method based on an approximate trap door under an on-lattice standard model, and the method comprises the steps: generating a public parameter, a main public key and a main private key through a system parameter generation device according to a system safety parameter; generating a signature vector of the to-be-signed message through a signature generation device according to the main public key, the main private key and the to-be-signed message; verifying the validity of the signature through a signature verification device according to the main public key, the to-be-signed message and the signature vector; wherein in the signature generation process, an approximate trap door expansion generation device and an approximate trap door sampling device are adopted, and the approximate trap door sampling device is used for carrying out geometric compensation on distribution deviation caused by using an approximate trap door, so that output distribution of signature vectors and ideal spherical discrete Gaussian distribution are indistinguishable in statistics. According to the method, significant compression of the public key and the signature size is realized, and an efficient signature solution is provided for quantum cryptography.

The invention relates to the field of privacy protection query schemes, in particular to an indoor multi-user personalized space keyword privacy query method based on a GIS enhanced index tree. According to the requirements of multiple users for space keyword privacy query in an indoor environment, encryption indexing is carried out on space and text information of an indoor object by constructing a GISEnhancedIndexTree index structure fusing a Hilbert code, an R tree, a densely distributed filter and an EASPE encryption vector. In the query process, a user request is encrypted into a trap door, and the server sequentially executes space, floor and keyword pre-filtering, encryption vector similarity calculation by means of EASPE, threshold filtering, score aggregation and sorting in the index tree and then returns an encryption result to the user. And meanwhile, a comprehensive position vector construction and local coordinate system-based privacy protection coordinate conversion method is designed, so that the privacy security of the whole flow of data is ensured. According to the method, the efficiency and accuracy of indoor multi-user personalized spatial keyword query are improved while the user privacy is effectively protected.

A palletizer for stacking cargo, such as bags or boxes, onto a pallet in multiple layers is disclosed. The palletizer includes a main frame extending in vertical direction; pallet lifting means for lifting a pallet, which pallet lifting means are arranged to the main frame and are movable in vertical direction between the base of the main frame and the top of the main frame; a manipulator arranged to the top of the main frame for positioning the cargo and forming a layer on top of a pallet lifted by the pallet lifting means; and a supply main conveyor, such as a belt conveyor, arranged with one end to the top of the main frame for supplying cargo to the manipulator. The manipulator includes a sub-frame movable in a horizontal plane relative to the top of the main frame; a first floor arranged in the sub-frame and a second floor arranged in the sub-frame and above the first floor, wherein each floor has an opening, which can be closed by a door, such as a trap door, and wherein the openings in the floors are aligned when viewed in a vertical direction; and a supply sub conveyor arranged with one end adjacent to the one end of the supply main conveyor and arranged with the other end to the sub-frame and adjacent to the opening in second floor, such that cargo is conveyed on top of the door closing the opening in the second floor. The first floor is rotatable relative to the sub-frame and around a vertical axis.

To address such a problem that rats are often caught in wire mesh cage traps, but effectiveness of the traps is halved because the wire mesh is see-through, making it too bright inside, creating a dead end where the rat cannot escape when attacked, and an entrance is on one side, so rats coming from the opposite direction cannot get in, and to provide a rat trap with entrances on both sides using a polyvinyl chloride pipe that is familiar to rats, because rats often enter and exit PVC pipes in drainage ditches.MEANS FOR SOLVING THE PROBLEM: Both ends of a horizontally placed vinyl chloride pipe are cut vertically to provide left / right rat entry holes, and trap sliding grooves are provided inside the pipe at a place slightly separated therefrom by diagonally opening toward a ceiling. After that, left / right trap doors that go up and down in the grooves are just made to complete the skeleton, and since an existing pipe is used, the process is short. The trap is easy to use, the left / right trap doors are lifted in an inverse-V-shape up to the space above the pipe, both the doors are stretched with a string to hold them stationarily, and a bait stick is hung on the string and suspended in the pipe. When a rat enters from either of the entry holds and bites the bait, a razor blade attached to the stick cuts the string, causing both left and right doors to fall simultaneously, trapping the rat inside the pipe.SELECTED DRAWING: Figure 1

Provided herein is a trap and related method for catching vermin, especially rats. The trap allows mechanical energy to be stored in an elastic element. This energy can be released momentarily in order to quickly actuate a trapdoor, a cover, from a closed position to an open position, in order to catch a rat thereby.

The invention discloses a supply chain data interaction method based on a block chain, and relates to the technical field of business data sharing, and the method comprises the steps: carrying out the supply chain data interaction through a block chain technology, and can effectively solve a problem that the data is too large; in the process of business data sharing through the block chain, the business data is encrypted, the security and efficiency of data transaction can be effectively improved in combination with decentralization and transparency of the block chain, and finally, under the condition that the business data is changed, the security and efficiency of the data transaction can be effectively improved. If yes, a trap door is recovered through trap door fragments held by the trap door fragment holding nodes, target key parameters corresponding to the block chain hash value are generated according to the trap door, the encrypted service data are modified according to the target key parameters and the changed service data, and block chain sharing of the real-time service data is achieved. And meanwhile, quick updating of the service data and tampering prevention of illegal persons are realized, and the response speed of the supply chain data is effectively improved.

A compressor system includes a compression module having an inlet for receiving air; and a filter housing in fluid communication with the compression module. The filter housing is constructed to house a filter, the filter having a sealing feature disposed at a first end of the filter and having an engagement feature disposed at a second end of the filter opposite the first end. The filter housing includes a trap door constructed to contact the engagement feature, and constructed to drive the engagement feature in a direction parallel to an axis of the filter toward the sealing feature and urge the sealing feature into sealing engagement with the filter housing.

The present invention relates to the technical field of agricultural and animal husbandry biological disaster prevention and control equipment, and in particular to an ant trap for early detection of red imported fire ant nests, comprising a base box, a trap box, a bait tray, a trap door and a trigger device; wherein the base box is a hollow box body with a cover plate provided at the bottom or side, the trap box is installed above the base box, the upper surface of the base box serves as the inner bottom surface of the trap box, an upwardly hinged outward-opening trap door is provided on one side of the trap box, the bait tray is installed in the trap box and connected to the trigger device, a hinged support rod is provided on the inner side of the trap door, and is linked to the trigger device via the support rod; the present invention is based on a trap door mechanism triggered by the residual weight of the bait, which realizes the function of capturing red imported fire ant workers for epidemic verification under the premise of low-cost reuse and easy operation, and can simultaneously realize fluorescent marking of red imported fire ant nests, so that the work of identifying and killing ant nests no longer relies on the characteristics of anthills, thereby preventing the further spread of the epidemic.

A temporary trap door cap device for sealing around a pressure-leaking trap door at an end of a pipeline terminating in a trap includes a canister formed from a longitudinally extending pipe having an open end and a closed end; and an annular rim connected to the open end, with an inner diameter smaller than an inner diameter of the canister. The annular rim is configured such that the inner diameter of the annular rim fits over the trap door of the trap terminating the pipeline. After the annular rim has passed over the trap door, the inner diameter of the annular rim is compressible against a body of the trap terminating the pipeline so as to seal an inner volume of the canister pressure-tight thereby containing the trap door within the pressure-tight volume.

Aspects of the present disclosure may include a method and / or a system for trap-door loading including pumping at least one qubit ion from a first manifold of a first plurality of manifolds to a second manifold of the first plurality of manifolds, drive the at least one qubit ion via a partial clock transition from the second manifold of the first plurality of manifolds to a third manifold of a second plurality of manifolds, applying one or more Raman pulses to transfer the at least one qubit ion from the third manifold of the second plurality of manifolds to a fourth manifold of the second plurality of manifolds, flushing the at least one qubit ion using a high-fidelity pumping back to the first plurality of manifolds, and illuminating the first plurality of manifolds for verification.

The invention relates to the technical field of identity authentication, in particular to an autonomous identity cross-domain authentication method, a storage medium and electronic equipment. The key is to solve the problem of key explosion of a traditional multi-attribute authentication system through a single trap door-multi-attribute public key structure. A user locally generates a main public key matrix A and a short-base trap door TA, and calculates a DID based on A and an identity label; and receiving an attribute random matrix Qj returned by the voucher issuing mechanism, splicing to form an attribute public key matrix APKj = [A | Qj], and sharing TA by all APKj to realize the multi-authentication domain independent anti-quantum signature. According to the design, the private key storage overhead is reduced from O (n) to O (1), flexible combination and minimum disclosure of cross-domain heterogeneous attributes are supported, privacy protection is enhanced through a unified trap door mechanism, and the expandability and practicability of the system are improved.