3results about How to "Realize dynamic protection" patented technology

The invention discloses a block chain digital asset transaction security verification method and device based on cross-dimensional biometric key right confirmation, and the method comprises the steps: constructing a feature set and a unique identification code based on a fingerprint ridge key and a facial feature key, carrying out the cross-dimensional fusion to form a biometric key reference vector, and calculating a hash value of an encrypted ciphertext; constructing a key retrieval voucher, and registering and storing the key retrieval voucher together with the unique identification code; when a user initiates a block chain digital asset transaction request, a to-be-verified biological key reference vector is generated based on a user fingerprint ridge key and a facial feature key, validity verification of hash and key feature right verification is performed in combination with a unique identification code and transaction information, and early warning is performed based on user verification frequency. And the safe and credible node performs secondary verification on the early warning. According to the method, a decentralized security verification system is constructed, safer, more reliable and more efficient security verification in block chain digital asset transactions is realized, and the credibility and security of the transactions are improved.

This invention relates to the field of forging technology, and specifically discloses a forging device for high-quality copper alloy forgings for engineering machinery. The top of the worktable is uniformly equipped with support shafts, the bottom of which is fixedly connected to the top of the worktable. A top plate is fixedly connected to the top of the support shafts, and a driving component is fixedly connected to the center of the top of the top plate. A forging plate is slidably connected to the support shafts, and the center of the top of the forging plate is fixedly connected to the output end of the driving component. A placement plate is slidably connected to the inner side of the worktable. In this forging device for high-quality copper alloy forgings for engineering machinery, the output end of the driving component drives the connecting shaft, thereby pushing the positioning plate to move synchronously towards the forging direction. This achieves centered positioning of the forging on the placement plate, ensuring that the forging is in the preset forging area in the center of the placement plate, providing a reliable positioning reference for subsequent forging by the forging plate.

This utility model discloses an excavator and its dual-bucket cylinder protection device. The dual-bucket cylinder protection device includes a protective cover connected to the bucket head via a first fixing component and a track connected to the cylinder via a second fixing component. The protective cover is positioned above the piston rod. Slide grooves are provided on both sides of the track. Sliding blocks matching the slide grooves are provided on the inner walls of both sides of the protective cover. The sliding blocks are slidably connected to the slide grooves. The first fixing component includes a first support frame fixed to both sides of the protective cover via a first fastener. A first fixing frame is fixedly connected below the first support frame via a third fastener. The second fixing component includes a second support frame fixed to the track via a second fastener. A second fixing frame is fixedly connected below the second support frame via a fourth fastener. This device effectively blocks mineral and rock fragments splashed in the mining environment, preventing the piston rod from being hit or scratched, achieving dynamic protection of the piston rod throughout its stroke, and significantly reducing the risk of surface damage.