11 results about "Perpendicular distance" patented technology

The invention discloses an automatic discretization method for a hydroelectric nonlinear characteristic curve. The method comprises the following steps: collecting n sample points of a hydroelectric original nonlinear characteristic curve, and setting the number of required discrete points to be m; virtually connecting the head and tail points of the original nonlinear characteristic curve to form a straight line, calculating the vertical distances between all sample points on the original nonlinear characteristic curve and the straight line, and calculating the maximum distance value D0 corresponding to the maximum distance point P0; if the maximum distance value D0 is larger than the distance threshold value, the maximum distance point P0 is reserved; respectively screening out the maximum distance points in the residual sample points, and comparing the maximum distance points with a distance threshold value; if the maximum distance value D0 is smaller than or equal to the distance threshold value, all middle points are removed, and only the starting point and the ending point are reserved; and repeating the steps, and removing the point with the minimum error every time until only m discrete points remain. According to the method, the discrete points with the given number can be rapidly and automatically extracted, and the extracted discrete points can accurately represent the original nonlinear characteristic curve.

The present application relates to the technical field of oil and gas, and discloses an optimization method for a barrier-encircling trajectory of a infill well, which comprises the following steps: step 1, establishing a geometric model of a fracture risk zone; step 2, establishing a formula for the perpendicular distance from a point on a direction line to the axis of a main fracture and a formula for a collision-preventing radius; step 3, calculating the nearest point from the fracture risk zone on a starting direction line and a target direction line; step 4, optimizing the trajectory design type; step 5, setting the constraint conditions for the designed trajectory of the well to be drilled; step 6, calculating the seepage ellipsoid volume and intersection volume of the main fracture; step 7, considering the interference effect of the main fracture, calculating the daily production capacity of the block to be drilled; and step 8, calculating the development cost and income of the block to be drilled; taking the net present value as a target function, solving the optimal barrier-encircling trajectory length, and completing the optimization of the barrier-encircling trajectory of the infill well. The present application can make the optimized trajectory safely bypass the fracture risk zone and have the optimal economic benefit.

The present application provides a dimension detection method and device for detecting the width between a first side surface and a second side surface of a workpiece that are opposite and parallel to each other. The dimension detection method includes: providing a carrier platform, on which a first standard component having a first standard surface and a second standard component having a second standard surface are provided, the second standard surface being parallel to the first standard surface, and the distance between the two being the standard width of the standard workpiece; placing the workpiece between the first standard component and the second standard component, with the first standard component located on one side of the first side surface and the second standard component located on one side of the second side surface; measuring a first perpendicular distance between the first standard surface and the first side surface; measuring a second perpendicular distance between the second standard surface and the second side surface; and determining the width between the first side surface and the second side surface based on the standard width, the first perpendicular distance, and the second perpendicular distance. The above-mentioned dimension detection method eliminates the influence of inaccurate positioning and temperature changes on the workpiece size, thereby improving the detection accuracy of the workpiece.

This invention discloses a method for measuring perpendicularity during the machining of high-precision tapered holes. A standard mandrel with the same taper as the high-precision tapered hole is inserted into the hole. Two planes with a perpendicular distance H and parallel to the perpendicularity measurement reference are selected on the cylindrical surface of the standard mandrel. The coordinate information of the contour lines on the standard mandrel corresponding to the two planes is obtained through a machine tool probe, and then the center coordinate point is calculated. The perpendicularity is then measured. This invention can detect the perpendicularity of the hole to be machined in real time. The measurement principle is simple, the operation is convenient, and it is easy to implement and promote.

A method for measuring a feature near the edge of an object comprising receiving image data characterizing the object, identifying an edge of the object, identifying a point on the perimeter of the feature at a position opposite the edge of the object, determining a reference plane, determining a three-dimensional reference line on the reference plane associated with the edge of the object, determining a three-dimensional measurement point on the reference plane based on the point on the perimeter of the feature, and determining the perpendicular distance from the measurement point to the reference line.

The invention belongs to the technical field of measurement, and particularly relates to a steel pipe straightness detection method, system and equipment. The objective of the invention is to solve the problem of low detection efficiency and detection accuracy of steel pipe straightness. The method comprises the following steps: setting a plurality of detection positions in the length direction of a steel pipe, synchronously collecting contour data of the steel pipe, and converting the contour data into contour point clouds under a unified coordinate system; combining all contour point clouds at the same detection position to form a complete section point cloud; solving the circle center coordinate of each section; based on a preset axial distance, axial coordinate values are distributed for the circle center of each section, and a three-dimensional center point sequence of the steel pipe is constructed; and calculating the vertical distance from the center of the middle section to a reference axis by taking a connecting line of the centers of the head and tail sections as the reference axis to determine the straightness of the steel pipe. According to the invention, the detection time of a single steel pipe is shortened, the detection efficiency is improved, the dependence on the manual operation speed is eliminated, and the objectivity and accuracy of the straightness detection result are improved.

The application discloses a hot-rolled strip steel local high point detection method, device, equipment and medium, and belongs to the metallurgical technical field.The method comprises the following steps: acquiring the positions and thicknesses of each detection point on a strip steel cross section; determining the perpendicular distances from a target detection point to each target straight line according to the positions and thicknesses of each first detection point, each second detection point and the target detection point, the target straight line being the line connecting the first detection point and the second detection point, the target detection point being any detection point among all the detection points, the first detection point being a detection point between the target detection point and a third detection point, the second detection point being a detection point between the target detection point and a fourth detection point, and the third detection point and the fourth detection point being located on the two sides of the target detection point; and determining the thickness state of the target detection point according to all the perpendicular distances, wherein the thickness state comprises a local high point state and a flat state.The method can automatically detect which detection points among all the detection points are local high points.

The present invention relates to a system and a method for generating a real-time topographic map with respect to an excavated face of a construction site with a real-time location of a bucket, and calculating a real-time perpendicular distance between the bucket and the excavated face based on the topographic map. Moreover, by comparing a topographic grid point assigning a real-time location of the bucket on the grid point generated to be fitted to predetermined resolution and a real-time location of a bucket, a real-time perpendicular distance of the bucket is calculated and provided to conveniently prevent pitching when drilling a deep place in which a clear view is hardly secured with respect to a drilling surface by an excavator driver.

A filament for an oral care implement has a longitudinal axis and a multi-edged cross-sectional area extending in a plane substantially perpendicular to the longitudinal axis, the multi-edged cross-sectional area having at least 18 projections and at least 18 grooves, the projections and grooves being arranged in an alternating manner. Each projection has a peak, and each groove has a bottom formed by neighboring and converging projections. Each peak has a height, the height being defined as a perpendicular distance measured from the peak of the projection to a tangent between to neighboring bottoms. Each groove has a depth, the depth being defined as a perpendicular distance measured from the bottom of the groove to a tangent between two neighboring peaks. A ratio of the peak height to the depth of the groove is from about 1 to about 2, preferably about 1.5

The invention is characterized in that the transformation element (30) has the shape of a plate with a tetragonal base with a central hole defined by an inner cylindrical surface (33), with linear guide surfaces (34a) lateral to the vertices of the teragonal base, on which there are cylindrical rolling elements (31) whose diameter is greater than the length of the guide track (34a), the guide tracks (34a) end at the profile parts (37). The ratio of the distance w of the linear guiding surfaces (34a) to the double of diameter of the rolling elements (31) is less than 1. The transformation member (30) of the invention is also characterized by the fact that the shortest distance (b) of the opposing profile parts (37) is less than or equal to the perpendicular distance of the paths (34a). The rolling bodies (31) of the invention have a central circular hole (32) for cylindrical pins (36), the diameter of the hole (32) and the diameter of the pin (36) being (approximately) the same. On at least one of the flanges (20), (20 ́) and the adjacent wheel (40), there are longitudinal recesses (26) between the guide tracks (34a) in which the pins (36) are guided and which are positioned in such a way that the position creep of the bodies (31) oscillating linearly on the guide paths (34a) is limited at the ends of the depressions (26). The transformation term (30) according to the invention is also characterized by the fact that the sides of the tetragon (38) are straight or arcuate.

The application relates to the technical field of geotechnical mechanics testing, in particular to a non-contact measurement method for a circular tunnel surrounding rock structure surface and related equipment, establishes a measurement control point and a measurement station position, establishes a local measurement coordinate system, determines feature points of a structure surface trace and coordinates of the feature points, converts the local coordinates into global coordinates by correcting a hole axis azimuth angle, constructs a corrected local coordinate system, obtains new coordinates of the feature points, projects the new coordinates to a tunnel cross section, calculates a perpendicular distance from the feature points to a circumferential line, optimizes the feature points according to the perpendicular distance to meet constraint conditions, determines a structure surface trace distribution map and occurrence of the feature points, and realizes accurate measurement and analysis of the tunnel surrounding rock structure surface. The application can obtain actual circular tunnel surrounding rock structure surface trace and occurrence information by reducing field measurement workload.