Abstract: A motor, a compressor, and a refrigeration device are provided. The motor includes a stator assembly and a rotor assembly. The stator assembly includes a stator core provided with a stator slot. The rotor assembly includes a rotor core and a permanent magnet. The stator core is sleeved outside of the rotor core or vice versa. The permanent magnet is arranged on the rotor core. By limiting the relationship between the distance between the stator core and the rotor core, the length of the permanent magnet in its own magnetization direction, the number of the stator slots, and the intrinsic coercivity of the permanent magnet, it is possible to adjust the strength of the demagnetization reverse magnetic field generated by energizing the motor.

Abstract: A motor, a compressor and a refrigeration device are provided. The motor has a stator and a rotor. The stator has a stator core and a winding. The stator core is provided with multiple stator protruding teeth. The winding are wound on the teeth. The rotor has a rotor core and a permanent magnet. The permanent magnet is arranged on the rotor core. A ratio of the number of the stator protruding teeth to the number of phases of the winding is adaptable to adjust the strength of a demagnetization reverse magnetic field generated by energizing the winding.

Abstract: A crossbeam for measuring deformation velocities of a surface of a material under a dynamic load includes a crossbeam body, a first type of velocimeter and a second type of velocimeter-mounted on the crossbeam body. The crossbeam body is mounted on a measurement carrier. The measurement carrier is configured to move along the surface of the material and apply a dynamic load to the surface. The first type of velocimeter is configured to measure the vertically resilient deformation velocity of the surface behind an action force of the dynamic load. The second type of velocimeter is configured to measure the vertical downward deformation velocity of the surface in front of the action force of the dynamic load. The vertically resilient deformation velocity and the vertically downward deformation velocity of the surface can be simultaneously and quickly obtained by the first and second types of velocimeters.

Abstract: A motor for a rotary compressor, and a compressor and an air conditioner having the motor, are disclosed. The motor includes a stator core and a rotor core. The stator core has a through-hole in a center thereof. The stator core is provided with a plurality of circumferentially spaced stator teeth, and the number of stator teeth is M. The rotor core is rotatably disposed in the through-hole. The rotor core is provided with a plurality of circumferentially spaced rotor slots, and the number of the rotor slots is N, wherein 2?N?M?6. A cross-sectional area of the stator core is denoted as S, and a distance between two endpoints of two radially opposite curved segments of an outer edge of the cross section is denoted as L, wherein 0.93?4*S/3.14/L2?0.96.

Abstract: A method for extracting a surface deformation feature of an object based on linear scanning three-dimensional point cloud is disclosed comprising: performing data acquisition by using a three-dimensional measurement sensor based on line structured light, and obtaining a three-dimensional point cloud data of a surface of the object after data pre-processing; eliminating influences of abnormal data and textures on extraction of sectional main profiles, to accurately obtain the sectional main profiles of the object; obtaining a binary image based on deformation feature points extracted from sections, in conjunction with a deformation feature knowledge base, and preliminarily positioning a deformation region based on sub-block images to obtain a set of target morphology sub-blocks; then performing a morphological operation on deformation feature points in the set of target morphology sub-blocks, and generating a deformation region of confidence ROC, and then performing a region growth to extract a target using ge

Abstract: A printed circuit board (PCB) panelization method and a PCB panelization system are disclosed herein. The PCB panelization method comprises the following steps: S1, reading daughterboard information of purchase orders, wherein the daughterboard information comprises respective areas, delivery quantities and attributes of daughterboards; S2, performing comparison of the daughterboard information, screening for daughterboards having attributes that are the same, and establishing a panelization rule database; S3, selecting panels (PNLs) satisfying requirements according to panelization requirements; S4, selecting, from the daughterboards having the same attributes as the selected panels, daughterboards to be panelized together for the selected panels, and arranging a graphical layout for a panelization of the selected panels.

Abstract: A three-dimensional measurement sensor based on line structured light, comprising a sensing head and a controller. The sensing head is used for collecting section data and attitude information of its own, and matching the section data with the self attitude information. The sensing head comprises a three-dimensional camera, an attitude sensor, a laser and a control sub-board, wherein the three-dimensional camera is installed at a certain angle relative to the laser, and acquires elevation and grey information about an object surface corresponding to laser rays using a triangulation principle. The attitude sensor, the three-dimensional camera and the laser are installed on the same rigid plane, and the attitude sensor reflects measurement attitude of the three-dimensional camera and the laser in real time. The controller is used for measuring and controlling the sensing head, performing data processing transmission and supporting external control.

Abstract: The present invention discloses a stepwise refinement detection method for pavement cracks, processing pavement images comprising the following primary steps: extracting and processing marking lines, extracting ROA, adaptive threshold segmentation based on ROA, extracting ROC and region growth based on ROC direction feature weighting.

Abstract: A three-dimensional measurement sensor based on line structured light, comprising a sensing head and a controller. The sensing head is used for collecting section data and attitude information of its own, and matching the section data with the self attitude information. The sensing head comprises a three-dimensional camera, an attitude sensor, a laser and a control sub-board, wherein the three-dimensional camera is installed at a certain angle relative to the laser, and acquires elevation and grey information about an object surface corresponding to laser rays using a triangulation principle. The attitude sensor, the three-dimensional camera and the laser are installed on the same rigid plane, and the attitude sensor reflects measurement attitude of the three-dimensional camera and the laser in real time. The controller is used for measuring and controlling the sensing head, performing data processing transmission and supporting external control.

Abstract: A method for extracting a surface deformation feature of an object based on linear scanning three-dimensional point cloud is disclosed comprising: performing data acquisition by using a three-dimensional measurement sensor based on line structured light, and obtaining a three-dimensional point cloud data of a surface of the object after data pre-processing; eliminating influences of abnormal data and textures on extraction of sectional main profiles, to accurately obtain the sectional main profiles of the object; obtaining a binary image based on deformation feature points extracted from sections, in conjunction with a deformation feature knowledge base, and preliminarily positioning a deformation region based on sub-block images to obtain a set of target morphology sub-blocks; then performing a morphological operation on deformation feature points in the set of target morphology sub-blocks, and generating a deformation region of confidence ROC, and then performing a region growth to extract a target using ge

Abstract: A printed circuit board (PCB) panelization method and system. The method comprises the following steps: S1, reading daughterboard information of purchase orders, wherein the daughterboard information comprises the respective areas, delivery quantities and attributes of daughterboards; S2, performing comparison of the daughterboard information, screening for daughterboards having the same attributes, and establishing a panelization rule database; S3, selecting panels (PNL) satisfying the requirements according to panelization requirements; S4, selecting, from the daughterboards having the same attributes as the selected panels, daughterboards to be panelized together for the selected panels, and arranging the layout for the panelization.

Abstract: The present invention discloses a stepwise refinement detection method for pavement cracks, processing pavement images comprising the following primary steps: extracting and processing marking lines, extracting ROA, adaptive threshold segmentation based on ROA, extracting ROC and region growth based on ROC direction feature weighting.

Abstract: A solar water heater including an outer housing and a heat absorbing water tank fixed onto the interior surface of the outer housing. The heat absorbing water tank may have a water entrance and a water exit. A heat insulating layer may be filled underneath the heat absorbing water tank between the heat absorbing water tank and the outer housing, and a transparent heat insulating board may be placed on top of the heat absorbing water tank. The heat absorbing water tank may have web system formed by tubules, or may be in a rectangular shape with reinforced concaves. The heat absorbing water tank may be manufactured by using plastic materials.