4 results about "Surface distance" patented technology

The present application relates to distance detection device, detection method and processing equipment, including processing head for processing workpiece, the processing head is fixed with distance detection device, the height of the workpiece surface is detected through the distance detection device, and the processing head is adjusted for processing according to the height. The distance detection device is detachably connected with the processing head, which facilitates the installation and disassembly of the detection device, and flexibly adapts to various processing heads and realizes the same axiality and same direction external force applied to the distance detection device for probe extension and contraction movement, avoiding the need for resetting point when the detection device extends and contracts in different positions. The distance between the workpiece surface and the processing head is measured quickly after resetting in the same XY axis position, reducing the movement time and improving the work efficiency. At the same time, the lever principle is used to solve the problem of insufficient extension distance of the detection device caused by insufficient space of the processing head. In the same axiality and same direction movement, the damage to the workpiece surface is small, the cost and maintenance cost are low, and the overall structure is simple and compact.

The present invention addresses the problem of providing a device and a method for predicting the position of occurrence of a shrinkage cavity in a casting, which are capable of increasing options for countermeasures against the shrinkage cavity in a casting. The present invention is a device for predicting the occurrence position of a shrinkage cavity in a casting cast by injecting molten metal into a mold, the device comprising: a measurement point setting unit for setting a plurality of measurement points for the casting; a molten metal replenishment limit solid fraction arrival time calculation unit that calculates a molten metal replenishment limit solid fraction arrival time for each measurement point; a solidification path setting unit that sets a solidification path of the casting by connecting measurement points selected on the basis of the molten metal replenishment limit solid fraction arrival time; a surface distance calculation unit that calculates, for each measurement point located on the solidification path, the distance from the measurement point to the surface of the casting closest to the measurement point; and a molten metal replenishment blocking site determination unit that determines a molten metal replenishment blocking site at which the replenishment of the molten metal is blocked during the solidification of the molten metal.

The application discloses a metal sealing structure leakage prediction method and system, first, a macroscopic service finite element model is constructed according to the structure and service parameters of the sealing structure, the service deformation behavior is simulated, the model is based on the rotation symmetry characteristic of the sealing structure, the axisymmetric shell model is adopted in the finite element software, the cross section is simplified, the grid is divided and the flange movement is set. Then, a microscopic crystal plastic model with a rough surface is constructed based on the surface roughness, the model construction and grid processing are carried out by considering the material microstructure and characteristics. The deformation amount of the contact position is extracted from the macroscopic model as the boundary condition of the microscopic model to simulate the microscopic deformation. Finally, the distance between the rough surface mean line and the flange surface distance is determined from the microscopic model as the gap height, and the internal and external pressure difference in the service of the sealing structure is combined to calculate the leakage amount of the sealing structure. In this way, the simulation result is more close to the actual situation by combining the macroscopic and microscopic models, and the leakage prediction precision and efficiency of the sealing structure are improved.

The application discloses a kind of based on the registration and fusion of heteroscale data, method, device and medium of quantitative evaluation of jacket damage, comprising: acquisition jacket monocular vision image sequence and laser radar data, respectively three-dimensional reconstruction obtains scaleless vision dense point cloud and has absolute scale laser point cloud;Three-dimensional feature is extracted and is registered by scale and pose decoupling strategy heteroscale, and high-precision datum point cloud model before construction is constructed;According to the same procedure, obtain the point cloud to be measured in construction, and the weight of large residual point pair in local deformation area is obtained by dynamic inhibition, and difference point cloud is obtained;Surface distance is calculated using a specific algorithm, and initial abnormal point cloud is extracted according to threshold value;Independent damage instance is separated by adaptive density clustering combined with spatial position and deformation depth constraint, and the surface area and maximum physical recess depth of each instance are quantified.The application realizes the complementary advantages of cross-scale data, solves the registration distortion problem of traditional method, and provides high-precision damage positioning and quantitative evaluation means.