32 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 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.

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 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.

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.

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 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.

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.

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.

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.

A trapdoor-insert assembly having a trapdoor with a fixed frame, a movable frame disposed in the fixed frame and a panel mounted on the movable frame. At least one of the frames including at least one section having a longitudinal seat defined by a bottom wall and by two sidewalls. The two sidewalls include two projecting wings in opposite parallel positions that extend for the entire length of the section. The assembly also includes an insert, which is connected to the section and has an operating portion and a coupling body with two retaining teeth that extend along opposite directions and are engaged under the two projecting wings.

A pest trap apparatus having a trap chamber attached to an entry channel, a drop cover having a trap door disposed within the trap chamber, such that the trap door provides a floor to the trap chamber, a shuttle box nested within the trap chamber and supported by the trap door, a sensor associated with the trap chamber, the sensor being configured to generate and transmit a signal upon detecting a pest, a striker in electrical communication with the sensor, such that upon receiving the signal from the sensor, the striker is configured to impact and rotate the trap door downward, thus dropping the shuttle box within the trap chamber to prevent escape of pests and sending pests within the trap chamber down into a trap chute below the trap chamber, and an actuator configured to reset the trap door by rotating it upward to reengage with a trap latch.

Live trap (100), comprising a housing (110) designed as an upright mobile waste container, in particular as a mobile waste container according to DIN EN 840 and in particular made of plastic, wherein the housing (110) has a bottom (114) and a housing opening (111) arranged laterally in a wall of the housing (110), and a trapping mechanism (170) arranged in the housing (110), wherein the trapping mechanism (170, 101) comprises a trapdoor (162, 172) and a trapdoor release (120, 178), wherein the trapdoor (172) is movable between a first operating position in which the trapdoor (162, 172) releases the housing opening (111) and a second operating position in which the trapdoor (162, 172) closes the housing opening (111). is, wherein the trapdoor release (178) is configured to hold the trapdoor (172) in the first operating position and to release it when actuated,so that the trapdoor (172) moves into the second operating position.

The invention discloses a geological basic data management service platform based on a block chain. The geological basic data management service platform comprises an application layer, a business layer, a contract layer, a service layer and a storage layer, and the storage layer comprises a block chain and an IPFS storage system. The geological basic data management service platform realizes geological data sharing based on a block chain, and comprises the following steps: obtaining a data retrieval request initiated by a user, the data retrieval request comprising a keyword and a private key; and when the role login of the user is verified to be successful, calculating the trust degree of the user. And generating a trap door based on the keyword and the private key. And requesting the index set of the block chain, and performing matching by using the trap door. And when the matching is successful, obtaining the confidentiality level of the geological data ciphertext accessed by the data retrieval request. And when the confidentiality level is matched with the trust degree of the user, the block chain returns a corresponding on-chain data ciphertext to the user. And decrypting the on-chain data ciphertext to obtain a data storage address of the geological data ciphertext in the IPFS storage system.

The application discloses an emergency rescue door lock reliable guiding method and system, and the method comprises the following steps: triggering a rescue call mode according to the identity authentication operation of a rescuer at any door lock; according to a rescue call starting event, a plurality of neighbor door locks of the current call door lock actively report their own information to form a candidate relay door lock information table containing neighbor door lock identification and management IP; according to the response of a trapped person through a voice device, an optimal relay door lock is selected and a reply message is encapsulated and forwarded to the relay door lock; according to the event that the rescuer moves to the relay door lock and is identified, the whole network service IP binding relationship and the response target of the trapped door lock are updated, and a new round of relay guiding is started. By using the embodiment of the application, the continuous reliability and optimal path accessibility of the guiding link under a complex emergency environment can be ensured, and the rescue efficiency and system adaptability are improved.

A landing pad receives and stores packages delivered from an aerial vehicle and 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.

The invention discloses a verifiable electronic health record ciphertext search scheme in a cloud-assisted electronic environment. The method comprises the following steps: (1) a system establishment stage: a trusted center (such as a government) BC determines a security level and establishes system parameters; (2) a key generation stage: the trusted center authenticates actual identities of the DO and the DU and issues valid certificates respectively; and (3) an updating stage: the DO encrypts the file and the index, generates proof of all keywords, and sends ciphertext of the file and the index to the CS. The certification of the keyword is publicly verified after being submitted to the BC. And (4) a trap door generation stage: the DU generates a search trapdoor of a request keyword, and sends the search trapdoor to the CS through the block chain. And (5) a search stage: the CS searches all matched search results and returns the search results to the DU through the BC. And (6) a verification stage: any participant can verify the correctness of a returned result according to the keyword proof sent by the DU and the corresponding trapdoor. And (7) a decryption stage: after receiving a result returned by the BC, the DU decrypts the result to obtain a corresponding index.

The subject of the application is a system for protecting buildings from unwanted animals, particularly intended for installation in structural elements of the building, such as roof soffits. The system comprises a mounting plate (4) within which a guiding tunnel (3) is formed, leading to a trapdoor containing at least one trapdoor leaf (1) and a release field (2). The trapdoor is mechanically connected to a trigger mechanism activated by the animal's interaction with the release field (2). Below the trapdoor is a masking cassette (6) containing a catch bag, wherein activation of the trigger mechanism causes the trapdoor to open and the catch bag to transition from a folded to an unfolded state.

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 rodent trap comprising an activation mechanism designed to be triggered by a rodent, a disposal mechanism designed to kill the rodent upon activation, a trapdoor located adjacent to the disposal mechanism with a closed and an open position, and a storage area located on the other side of the trapdoor with respect to the disposal mechanism. The trap is designed such that when a rodent is killed by the disposal mechanism, its carcass passes through the trapdoor into the storage area.