Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

109 results about "Measurement Profiles" patented technology

A Profilometer is a measuring instrument used to measure a surface's profile, in order to quantify its roughness.

Torsion calibration device and method for measurement beam used for ship model wave load test

The invention provides a torsion calibration device for a measurement beam used for a ship model wave load test. The torsion calibration device for the measurement beam used for the ship model wave load test comprises a measurement beam. A beam surface of a measurement profile of the measurement beam is provided with a foil gage. One end of the measurement beam is fixed on a support, and the other end of the measurement beam is fixedly connected with a rod piece. The rod piece is vertical to the axis of the measurement beam. A tray is hung on one end of the rod piece through steel wire ropes, and weights can be placed on the tray. The distance between one end of the rod piece and a hanging end is equal to the distance between the other end of the rod piece and the hanging end. The torsion calibration device for the measurement beam used for the ship model wave load test provides a torsion calibration method for a measurement beam used for a ship model wave load test. According to the torsion calibration method for the measurement beam used for the ship model wave load test, by independently conducting gradation loading and weight unloading on two ends of the rod piece, the strain of each measurement profile is collected, fitting coefficients of the weight acting force and the strain are obtained, and a coefficient factor of the strain of each measurement profile of the measurement beam and a torsion in the wave load which is actually suffered by each measurement profile of the ship model is counted. The coefficient factor between the strain of each measurement profile of the measurement beam and a torsion in the sea load which is actually suffered by each measurement profile of the ship model can be demarcated through the torsion calibration device and the method for the measurement beam used for the ship model wave load test.
Owner:CHINA SHIPBUILDING INDUSTRY CORPORATION

Device and method for bending moment calibration of measurement beam for ship model wave load test

InactiveCN103018006ASimple structureEasy to operateHydrodynamic testingClassical mechanicsCoefficient of relationship
The invention belongs to the technical field of ship model wave load test and relates to a device and a method for bending moment calibration of a measurement beam for ship model wave load test. The device for bending moment calibration of the measurement beam for ship model wave load test comprises the measurement beam, strain gauges are arranged on the beam surface at positions of measurement profiles of the measurement beam, one end of the measurement beam is fixed on the support, a tray is hung at the other end of the measurement beam via a steel wire rope, and weights can be placed on the tray. The method for bending moment calibration of the measurement beam for ship model wave load test includes: by the aid of a mode of stepwise loading and then stepwise unloading of the weights, collecting strain of each measurement profile, computing fitting coefficient of acting force of the weights and the strain, and computing coefficient of relationship between the strain of each measurement profile of the measurement beam and bending moment in actually born wave load of each measurement profile of a ship model by the aid of the fitting coefficient and space between each measurement profile and the hanging end. The device and the method are capable of calibrating the coefficient of relationship between the strain of each measurement profile of the measurement beam and the bending moment in the actually born wave load of each measurement profile of the ship model.
Owner:中国船舶重工集团公司第七〇二研究所

Gear and moulding structure outline measuring method based on template near-field light projection scanning

InactiveCN101782374AComplete geometryComplete parametersUsing optical meansImage resolutionTemplate based
The invention relates to a gear and moulding structure outline measuring method based on template near-field light projection scanning. A template which is same with the cross section of teeth or a tooth groove of a measured gear is manufactured according to the shape of a measured gear and placed into the tooth groove of the measured gear; then, an illuminating light source is installed at one side of the template, and the outline data of the surface of an object are obtained by utilizing a triangular relationship comprising a CCD or an image sensor and an edge projection; and aiming at each tooth on the gear, the measured gear is rotated by an angular division coding device to carry out repeated measurement to completely measure the geometrical shape and parameter of the whole gear. The invention can realize micron-grade shadow projection, therefore, the measurement precision along the surface normal direction can reach more than 5 microns in the outline measurement of moulding structures, such as a counter gear, and the like. The transverse resolution reaches more than 20 microns, and the measurement speed reaches more than 5,000 point/second. The invention is particularly suitable for the quality detection of gear processing. The technology can also be used for the surface outline measurement of other structural elements.
Owner:XI AN JIAOTONG UNIV

High-precision free-form surface profiling measurement device and method based on three-dimensional measurement frame

PendingCN113834438AMeet the testing processHigh precisionUsing optical meansLinear motionMeasurement device
The invention discloses a high-precision free-form surface profiling measurement device and method based on a three-dimensional measurement frame. Three linear motion tables, two rotary tables and an angular displacement table are combined to form a six-axis linkage mechanism, and a high-precision displacement sensor is driven to move in six degrees of freedom in a three-dimensional space relative to a measured object, so that scanning measurement of a free-form surface with complex geometric characteristics such as high curvature and large rise is realized. In addition, the three-dimensional measurement frame is constructed through the high-precision displacement sensor, so that an error transfer chain is blocked, and various error sources such as straightness errors and positioning errors in the scanning process are compensated. The device and method are suitable for fast detection of the surface type of the free-form surface, can also be used for surface type detection of aspheric, spherical and planar elements, have the advantages of being good in universality, high in measurement speed and high in measurement precision, not only can solve the measurement problem in the current free-form surface manufacturing process, but also can meet the detection process of planar, spherical, aspheric and other optical elements.
Owner:ZHEJIANG UNIV

Three-dimensional microscopic surface profile measuring device based on Greenough-type stereomicroscope and a method of device

The invention discloses a three-dimensional microscopic surface profile measuring device based on a Greenough-type stereomicroscope and a method of the device. A camera and a projector are installed in two imaging light paths of the Greenough-type stereomicroscope, so driving structured light three-dimensional microscopic surface profile measuring is achieved. During measuring, when a measurement system is calibrated, the method is combined with a phase shift profile measuring technology for non-linear fitting calibration between height and a fringe phase on the microscope projection light paths, then internal and external parameters of the camera light path are calibrated by means of a perspective model, accordingly a homograph matrix of the camera is obtained, height distribution information of three-dimensional point cloud data of a to-be-detected object is obtained according to the relation between the height and the phase, and then transverse position distribution of the three-dimensional point cloud data of the object is obtained according to an equation set determined by the obtained homograph matrix of the camera. The device and the method have the advantages of being simple, efficient and low in cost, and three-dimensional point cloud data of tiny object surface can be quickly obtained by projecting multiple sets of phase shift period fringes and combining system calibration parameters.
Owner:NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products