8results about How to "Keep safe" patented technology

The invention discloses a motor control method and device, cleaning equipment and a storage medium, and the method comprises the steps: determining a voltage change rate based on a driving voltage signal; predicting whether a power-off risk exists or not based on the voltage change rate; if yes, the current driving voltage is determined based on the driving voltage signal, the current driving voltage and the voltage change rate are input into a turn-off state machine, and the turn-off state machine comprises a plurality of states divided based on different voltage threshold values and / or different voltage change rate threshold values; based on the turn-off state machine, the motor is controlled to be switched among the multiple states, and turn-off operation corresponding to the current state is executed. Whether a power-off risk exists or not is predicted by monitoring the voltage change rate of the motor, the state of the motor is switched through the turn-off state machine when the power-off risk exists, and different turn-off operations are executed in different states, so that the influence of sudden power-off on the service life of a battery and devices is avoided, orderly storage of key operation data is facilitated, and the service life of the battery and the devices is prolonged. The equipment reliability is improved.

The invention discloses a data lake table tape backup method and device, computer equipment and a storage medium. The method comprises the following steps: scanning a table list to be backed up to judge whether a table needing to be backed up exists or not; when the table needing to be backed up exists, the table to be backed up is determined; performing backup according to the type of the table to be backed up; and if the table cannot be obtained, writing all records from the last snapshot backup into a new Iceberg table for all tables involved in the backup, copying related data to a specified tape directory, and inserting the corresponding records into a metadata table. By implementing the method disclosed by the invention, economical and reliable long-term data backup can be realized, and the method is particularly suitable for application scenes with strict requirements on data persistence and integrity so as to solve the problems of efficiency and management of backup of a big data system.

The utility model discloses a food material dynamic fresh-keeping cabin structure based on multilayer vacuum negative pressure, and relates to the technical field of fresh keeping. The fresh-keeping device comprises a fresh-keeping cabin, an adjustable partition plate mechanism and a lock catch mechanism are arranged on the fresh-keeping cabin, the adjustable partition plate mechanism comprises two first hinge blocks fixedly connected to the inner wall of the bottom of the fresh-keeping cabin, first hinge rods are hinged to the two first hinge blocks, second hinge blocks are hinged to the tops of the two first hinge rods, and the first hinge blocks and the second hinge blocks are fixedly connected to the inner wall of the bottom of the fresh-keeping cabin. Connecting blocks are fixedly connected between the two second hinge blocks, an electric telescopic rod is fixedly connected between the two connecting blocks, and second hinge rods are hinged to the two second hinge blocks. The adjustable partition plate mechanism is arranged, so that the problems that when an existing fresh-keeping cabin structure is used, the interval of interlayers is inconvenient to adjust, sufficient space is difficult to provide for food materials, large-size food materials can be squeezed due to the fixed space, damage and deterioration are caused, and losses are caused are solved.

The application discloses a food preservation method applied to a vegetable food medium, and belongs to the technical field of food preservation. The method is applied to a freezing process of the vegetable food medium, and different power-on stages are determined according to different components of the vegetable food medium. The application fully considers the component difference of the food medium, and different forms and sizes of electric current are applied to different components of the food medium in the cooling process of the food medium, so that the different components of the food medium can be properly preserved, and the quality of the food medium after thawing is improved.

The application discloses a food preservation method applied to shell, soft or amphibian food medium, belongs to the field of food preservation, and is applied to the freezing process of the shell, soft or amphibian food medium, and comprises the following steps: sequentially judging whether the food medium contains a shell layer (an epidermal layer), a meat layer and a cartilage layer or an egg layer, and if yes, performing three power supply stages, respectively, wherein the three power supply stages all comprise positive side alternating current and negative side alternating current. The application fully considers the component difference of the food medium, applies different forms and sizes of electric current to different components of the food medium in the cooling process of the food medium, so that the different components of the food medium can be properly preserved, and the quality of the food medium after thawing is improved.

The utility model relates to the related technical field of down removing equipment, discloses a down cut-part cleaning and filtering machine, and aims to solve the problem that down on cut-parts drifts away everywhere after being blown out. The down blown from the cut-parts enters the separation chamber and is filtered by the filter cartridge, and the filtered down enters the collection chamber, so that the down can be reutilized, and the effects of plasma blowing and down recovery are finally realized.

This invention provides a gas cylinder storage facility and a gas cylinder safekeeping facility, which can store gas cylinders safely and easily. The gas cylinder storage facility (1) of this invention can accommodate multiple gas cylinders (2) and includes: a pair of frames (3) forming a space for storing the gas cylinders (2) to be stored, the pair of frames being arranged opposite each other and extending in the depth direction; a pair of conveying rollers (5) provided at the lower end of the pair of frames (3) in a manner spanning the left and right side frames (3R, 3L) in the depth direction; a gas cylinder holding plate (7) provided on the frames (3R, 3L), open in the conveying direction but closed in the opposite direction, the gas cylinder holding plate being provided at predetermined intervals in the depth direction corresponding to the number of gas cylinders (2) stored; and a stop member (9) provided at the innermost side in the conveying direction, which stops the movement of the gas cylinders (2) by abutting against the conveyed gas cylinders (2).

This application discloses a communication method and apparatus, a storage medium, and an electronic device. The method includes: acquiring user account data sent by a blockchain node, wherein the account data includes at least the user's account identifier and whether the user has subscribed to satellite communication services; the account data is configured to be determined by the terrestrial operator's service platform and sent to the blockchain node for storage; synchronizing the account data to the satellite core network, so that when the user initiates registration with the satellite core network through a terminal device, the satellite core network verifies the user's roaming capability to indicate whether the user is allowed to use the terminal device for data interaction. This application solves the technical problem that there is currently no data synchronization mechanism between terrestrial operators and satellite operators, making it difficult to guarantee the effectiveness of communication control.