9 results about "Translational displacement" patented technology

A method of aligning coordinate frame obtained from at least two different coordinate measurement systems is disclosed. The method includes: initializing a second coordinate frame and a second part coordinate system of a component positioned in a second system; generating a second data pointset associated with the second system; receiving a first data pointset associated with a first system; determining an alignment of the second part coordinate system with the first part coordinate system by estimating an angular offset or a translational offset between the second part coordinate system and the first part coordinate system. The method includes, if the determined alignment indicates no alignment of the second part coordinate system with the first part coordinate system, repeatedly applying an angular rotation or a translational displacement to the component positioned in the second system; and determining the alignment of the second part coordinate system with the first part coordinate system.

A device and a method for calibrating a light projector (1) with adaptable luminous elements (3) arranged in an image plane (2), comprising a camera (4) and a control unit (5) connected to the light projector (1) and the camera (4), wherein the light projector (1) is configured to project in temporal succession at least two test images (6, 6′) with at least two comparison structures (9, 9′) from the image plane (2) to an arbitrarily extending projection surface (7), the camera (4) is a depth camera configured to record at least two camera images of a recording surface (8) in a manner substantially synchronized temporally with the light projector (1), and to detect the three-dimensional position data of the comparison structures (9, 9′) in the camera images, and the control unit (5) is configured to determine the position and orientation of the light projector (1), and to calculate the translational displacement and rotational twist between camera (4) and projector (1).

Apparatus and method for mechanical autofocus laser marking. Contents of the summary.The invention relates to a laser marking device comprising: - a frame (4) supporting a laser beam emission device (3) which is directed inside a sleeve having a head (11) extended by a protective tube (12); - a detection system for when the protective tube is against the head of the sleeve and the surface (2a) to be marked; - the emission device is mounted on the frame by means of a sliding connection allowing translational movement between the frame and the emission device; - a displacement system (6) for moving the emission device relative to the frame, relative to the head of the sleeve and the surface of the part to be marked, by an additional stroke; - a damping system mounted between the emission device (3) and the frame (4) to absorb at least the additional stroke. Figure for the abstract: Fig. 1.

The invention discloses a non-contact floating tunnel model dynamic response and wake flow field combined measurement method. The method comprises the following steps: constructing a floating tunnel pipe section model; a plurality of visual identification mark points are arranged on the outer surface of the model, a binocular stereoscopic vision system is arranged outside the test environment, and the translation displacement, the rotation angle and the anchor cable dynamic tension of the model are obtained and serve as dynamic response information; arranging a particle image velocity measurement system and a wave height measurement device in a flow field area around the model, and obtaining a velocity vector field of a wake flow area of the model and wave surface elevation information before and after the model as wake flow field information; time synchronization setting is carried out on the binocular stereo vision system, the particle image velocity measurement system and the wave height measurement device, and dynamic response information and wake flow field information are located in the same space-time coordinate system; and carrying out a loading test under the action of waves, ocean currents or coupling thereof, and synchronously collecting and recording dynamic response information and wake flow field information of the pipe section model. The method has high universality and adaptability.

The present invention discloses a device for monitoring the dynamic deformation of a structure under a collision load. The impacted structure undergoes dynamic deformation under the impact load of the impact head. A three-dimensional deformation needle engraving and re-engraving system is located behind the impacted structure and includes a push rod, a support frame, and a transparent baffle. The push rod is arranged between the impacted structure and the transparent baffle and is horizontally constrained on the support frame. The front end of the push rod is in conformal contact with the impacted structure, and the rear end is coated with a fluorescent material and is adjacent to the transparent baffle but not in contact. Both the push rod and the transparent baffle can move freely horizontally. A laser displacement measurement system and a high-speed camera are both arranged behind the transparent baffle. The present invention converts the complex deformation pattern of the hull structure under the impact load into a translational displacement of the transparent baffle in real time through multiple push rods that can move in a single degree of freedom, and monitors the maximum deformation in real time through a laser displacement sensor. The position and time of each fluorescent contact mark on the transparent baffle are recorded by a high-speed camera to determine the movement trajectory of the collision point.

The invention discloses a scanning interference photoetching device, relates to the technical field of interference photoetching for micro-nano structure manufacturing, and solves the problems that an existing scanning interference photoetching system is complex in structure and is easily influenced by a boundary environment; the interference pattern parameter adjusting device comprises a phase measuring element, a phase measuring detector and a diaphragm which are fixed on a supporting structure, wherein the phase measuring element, the phase measuring detector and the diaphragm are fixed on the supporting structure; the Lloyd mirror is connected with the supporting structure through piezoelectric ceramics, the supporting structure is fixed to the base, the translation table conducts two-dimensional translation movement relative to the base, and the displacement measuring device measures the translation displacement variation of the translation table relative to the base. According to the invention, the interference pattern is formed in a wavefront splitting mode, the structure composition and period adjustment are simple, high stability is easy to obtain, and the adjustment of interference pattern parameters is more convenient. And the problem of high difficulty in obtaining and processing a large-area loyd mirror material is avoided.

A method for analyzing and predicting the impact of rectangular curve jacking bottom curtain method construction on existing objects is proposed. The present invention proposes a method capable of predicting the impact of rectangular curve jacking bottom curtain method construction on existing objects. Panel resistance data is calculated from the jacking thrust data during the rectangular curve jacking process. By establishing a relative coordinate system and utilizing the calculation principle of the Mindlin solution of a semi-infinite space in elastic mechanics, the geometric model of the rectangular curve jacking arc beam is simplified to calculate the additional stress at each position in the object caused by the head-on resistance. Based on the Winkler foundation model, the vertical settlement of each point on the object is calculated according to the foundation model, deformation coordination conditions, equilibrium equations, etc. The external force acting on each point on the object is calculated by discretizing the geometric model of the object to obtain the resultant force state of the object. The translational displacement and pure rotational displacement of the object during the jacking process are calculated to predict the dynamic displacement of the object during the rectangular curve jacking process.

The application discloses a kind of dynamic detection method and detection device based on mobile medical equipment, including the following steps: the detection device coordinate system is consistent with equipment coordinate system;Through three-axis translation mechanism cooperation translational sensing component, the translation displacement signal of equipment along X axis, Y axis, Z axis is collected, through three-axis rotating mechanism cooperation rotating sensing component, the rotation angle signal of equipment around X axis, Y axis, Z axis is collected, and rotation axis around X axis, Y axis, Z axis intersects at a point;Based on translation transformation matrix, around X axis / Y axis / Z axis rotation transformation matrix, the displacement signal and angle signal are solved coordinates, and the equipment space pose transformation matrix is obtained;Output equipment displacement, speed, position accuracy and speed accuracy parameter, and pose data is output to image processing system for image correction.The technical problem that the imaging quality stability is not high in the present technical field due to the lack of real-time, accurate six-degree-of-freedom motion posture monitoring of mobile medical equipment is solved.

This invention discloses a method for inverting the displacement field of a thick-walled solid structure based on virtual plying, relating to the field of displacement monitoring and inversion technology for thick-walled solid structures. The steps include: embedding a geometrically attached and mechanically isolated virtual ply on the outer surface of the thick-walled solid structure; collecting surface strain as virtual ply membrane strain by arranging measuring points on one side of the virtual ply neutral plane; constructing a weighted least squares functional containing a membrane strain fitting term and bending and shear strain regularization terms; performing variational decomposition of the functional to obtain the virtual ply nodal displacements; and mapping the virtual ply translational displacements to the corresponding nodes of the solid structure to achieve displacement field inversion. This invention solves the problem of high-precision displacement inversion of thick-walled solid structures with single-sided point arrangement without interfering with structural stress, improves the numerical stability of the inversion, adapts to solid element models, is applicable to structures such as pressure vessels, and can be used for structural health assessment.