4results about How to "Little outside influence" patented technology

The embodiment of the application discloses a landslide water content in-situ monitoring device and a landslide water content in-situ monitoring method.The device comprises a conical barrel, a pressure detection device and an isolation protection piece; the pressure detection module is arranged in the shell; the isolation protection piece is arranged in the shell and placed on the pressure detection module; a soil loading space is formed between the conical barrel and the isolation protection piece; a plurality of water permeable holes are arranged on the side wall of the conical barrel.The device has simple structure, and can realize real-time monitoring of the soil water content in the landslide according to the definition of the soil water content.Compared with the test equipment and method such as the capacitive type, the ultrasonic type, the electromagnetic pulse type and the remote sensing type, the device does not need to establish a mathematical model of the soil water content and other sound, electric physical quantities, overcomes the deviation of the water content results caused by different particle components and mineral components of the soil, and provides strong support for the landslide monitoring and early warning and the landslide sliding mechanism research.

A kind of permanent magnet synchronous motor bearing fault diagnosis method based on motor current analysis method, first acquisition permanent magnet synchronous motor stator U, V phase current signal, calculate W phase current;Three-phase current is obtained by space vector dimension reduction two-phase current under rectangular coordinate system, and two-phase current is carried out vector normalization processing;Based on the mechanism of action of bearing fault to current signal and the characteristics of current signal, the signal after space vector dimension reduction is carried out variation modal decomposition, the approximate entropy of modal component is calculated and the feature matrix is formed;The improved standard artificial bee colony algorithm makes the bee colony type mutually transform according to the optimal solution, and changes the bee colony initialization population generation rule, the optimal classification model is obtained by using the optimized adaptive variable type algorithm to optimize machine learning model parameter;Using optimal model, the test set in sample set is classified according to fault type, and compared with label to obtain test set accuracy rate;The present application has the advantages of high accuracy, high diagnostic efficiency and the like.

The utility model discloses a silkworm egg hatching system, including the independent placement of hatching box in silkworm room, every hatching box is equipped with the vertical branch pipe, and the bottom of arbitrary branch pipe is closed and the upper end is through hatching box, and the upper end of branch pipe is communicated to the water vapor supply main pipe in the upper side, and the valve seat is axially spaced and is located in the side of hatching box, and the hatching frame is movably placed in hatching box, the position valve seat position of hatching frame one to one corresponds, and after being placed in hatching box, the valve seat is opened to the inside top, to directly supply the water vapor of the hatching frame of being placed. The utility model discloses the hatching box is independent and relatively closed to silkworm room, so the water vapor in the inside is less influenced by the outside, and when the hatching seat is placed in hatching box, can quickly carry out water vapor supplement, even when single hatching seat is taken out, basically will not influence the water vapor stability of the rest hatching frame in the hatching box, and the whole system can easily control the water vapor in every hatching box, and the stability is higher.

This invention relates to the field of precision drive and positioning technology, and discloses a three-dimensional macro-micro composite positioning stage, which includes a stage body, an X-axis motion component, a Y-axis motion component, a Z-axis motion component, and a mobile terminal platform connected to the X-axis motion component, Y-axis motion component, and Z-axis motion component respectively. The X-axis motion component includes an X-axis macro-drive and an X-axis micro-drive; the Y-axis motion component includes a Y-axis macro-drive and a Y-axis micro-drive; the Z-axis motion component includes a Z-axis macro-drive and a Z-axis micro-drive, used to jointly drive the mobile terminal platform to linear motion along the X-axis, Y-axis, and Z-axis. This invention balances large stroke and high precision, achieving three-dimensional positioning with millimeter-level stroke and nanometer-level precision. The X-axis, Y-axis, and Z-axis micro-drives use piezoelectric ceramic direct drive, resulting in high positioning accuracy and fast response speed. The overall structure of this invention is reasonable and compact, and its operation is reliable.