224 results about "Displacement based" patented technology

Methods, devices, and systems for laser eye surgery generally make use of a console that interchangeably accepts multiple types of eye treatment cassettes. The cassettes enable one or both of displacement-based or vacuum-based aspiration. The console and the cassette may communicate to establish the functionality of the installed cassette by utilizing a component indigenous to the operation of the cassette. A dual-mode cassette may include a separable holding tank for enabling vacuum-based aspiration. A displacement-based pump may be provided to drain the holding tank while the vacuum system continues to aspirate fluids. A vacuum sensor for controlling the flow of aspirated fluids may have three ports for communicating with a handpiece, a displacement-based pump, a vacuum-based pump, or an irrigation source. The handpiece may be vented during vacuum-based aspiration by opening a vent valve interposed between the handpiece and the vacuum source.

A method for quantifying cardiac desynchrony of the right and left ventricles includes obtaining cardiac acquisition data from a medical imaging system, and determining a movement profile from the cardiac acquisition data. The movement profile is directed toward identifying at least one of a time-based contraction parameter for a region of the left ventricle (LV), and a displacement-based contraction parameter for a region of the LV. The determined movement profile is visually displayed by generating a 3D model therefrom.

A text enhancement method and apparatus for the presentation of text for improved human reading. The method includes extracting text specific attributes from machine readable text and varying the text presentation in accordance with the attributes. The preferred embodiment of the method: extracts parts of speech and punctuation from a sentence, applies folding rules which use the parts of speech to determine folding points, and presents text segments each on a new line and having a determined horizontal displacement based on the text specific attributes. One method displays text over bent curves having a shape based on text content. Another method includes displaying relative text position within a hierarchy using alternating vertically and horizontally tiled planes. Another method supports reading text segments across opposed pages without waiting for paging. Yet another method displays text to allow reading from bottom to top as though from front to back. Still another method displays words in colors reflecting the relationships between the words and the larger text segments of which they are apart.

The invention discloses a uniform load surface curvature-based simply supported beam crack damage identification method. The method includes the following steps that: the modal parameters of a simplysupported beam before and after the simply supported beam is damaged are obtained through testing, flexibility matrixes are calculated on the basis of frequencies and vibration modes; a uniform load is applied to the simply supported beam, and the uniform load is multiplied by the difference of the flexibility matrixes which are obtained before and after the simply supported beam is damaged, so that a corresponding displacement difference is obtained; the curvature of the displacement difference is obtained, and a uniform load surface curvature difference is obtained; a relation between the position of a crack and the uniform load surface curvature difference of adjacent measurement points is built based on a linear interpolation theory, so that the accurate positioning of the position ofthe crack can be realized; a uniform load surface curvature-based structural stiffness damage degree identification method is built on the basis of relations between displacement curvatures and structural stiffness and bending moment; and a relation between the height of the crack and a uniform load surface curvature is built through a series equivalent linear stiffness model, so that the quantification of the height of the crack can be realized. With the method of the invention adopted, the position and height of the crack of the simply supported beam can be accurately positioned and quantified. The method is applied to the damage degree evaluation of the structure of a simply supported beam.

A color image forming apparatus includes a pattern forming mechanism configured to form a pattern for fine adjustment and a pattern for rough adjustment on a transfer medium, a detection mechanism configured to detect the pattern formed thereon, a displacement calculation mechanism configured to obtain a predetermined value and preset reference values, to calculate the amount of displacement based on the detected pattern and the preset reference values, and to determine whether or not the amount of the displacement is equal to or less than the predetermined value, and a displacement correction mechanism configured to correct the displacement based on the calculation.

A magnetic metal sensor having a high response speed and which can detect small-sized metal pieces and can elongate the separation from the metal pieces. A magnetic metal sensor 2 has a core 22 defining a substantially U-shaped open magnetic path and coils 23, 24 of the same polarity mounted on the core 22. A uniform magnetic field along the direction of magnetic sensitivity is applied by a magnet 25 across the coils 24, 24. If magnetic metal approaches to a open magnetic path portion of the core 22 of the magnetic metal sensor 2, the magnetic reluctance of the magnetic circuit formed by the core and air is changed, as a result of which the impedance of the cores 23, 24 is changed. The magnetic metal sensor 2 detects the possible presence of magnetic metal or its displacement based on impedance changes of the paired coils 23, 24.

Embodiments of the disclosure include an apparatus and methods for using a piezoelectric device, that includes an outer flextensional casing, a first cell and a last cell serially coupled to each other and coupled to the outer flextensional casing such that each cell having a flextensional cell structure and each cell receives an input force and provides an output force that is amplified based on the input force. The apparatus further includes a piezoelectric stack coupled to each cell such that the piezoelectric stack of each cell provides piezoelectric energy based on the output force for each cell. Further, the last cell receives an input force that is the output force from the first cell and the last cell provides an output apparatus force In addition, the piezoelectric energy harvested is based on the output apparatus force. Moreover, the apparatus provides displacement based on the output apparatus force.

The invention discloses a pump displacement control system used for a concrete pump. The pump displacement control system comprises a detection device and a control device (1), wherein the detection device is used for detecting information reflecting the current material level height in a concrete pump hopper (7) and sending a detection signal, the control device (1) is used for receiving the detection signal sent by the detection device and obtaining the current material level height, the control device (1) judges whether the current pump displacement is in a preset range based on the current material level height, and the control device (1) controls the current material level height to be in the preset range. The control system can detect the material level height in the hopper in real time and automatically adjust the current pump displacement based on the material level, thereby improving the operation reliability and the construction efficiency. The invention also discloses a pump displacement control method and a concrete pump comprising the control system.

The invention discloses a method and an apparatus for measuring underground displacement based on an underground displacement measuring integrated sensor. The underground displacement measuring apparatus comprises 1 to m underground displacement measuring integrated sensor units which have identical structures and are connected in series in turn from the top down through a 485 bus, wherein the mth underground displacement measuring integrated sensor unit is connected with an underground displacement measuring centralized processor A through a 485 bus; and an entire measuring cluster consisting of integrated sensors is packaged inside a heat shrinkable rubber-plastic hose. The underground displacement measuring apparatus integrates a mutual-induction coil, a deviation-measuring integrated circuit, a communication bus, a sinusoidal signal generating circuit and a sinusoidal signal measuring circuit, etc. into a measuring integrated unit, and keeps a plurality of measuring integrated units in a certain distance to form the underground displacement measuring cluster; then, the underground displacement measuring centralized processor carries out centralized processing of the displacement of each underground position; therefore, the underground displacement measuring apparatus is formed to measure deformation from the ground to a deep position.

System, method and software product for numerically simulating structural behaviors of an engineering product in compressible and near-incomprssible region is disclosed. Meshfree enriched finite element method (ME-FEM) is used for such numerical simulation. ME-FEM requires an engineering product be represented by a FEM model comprising a plurality of finite elements. Finite elements used in the ME-FEM are generally low-order finite elements. Each of the finite elements in the FEM model is enriched by at least one meshfree enriched (ME) node located within the element's domain. Each ME node has additional degrees-of-freedom for the element it belongs independent from those of the corner nodes. A displacement based first-order convex meshfree approximation is applied to the ME node. The convex meshfree approximation has Knonecker-delta property at the element's boundary. The gradient matrix of ME-FEM element satisfies integration constraint. ME-FEM interpolation is an element-wise meshfree interpolation that is discrete divergence-free at the incompressible limit.

A method for monitoring chest compressions using a compression member includes measuring a force exerted by the compression member, measuring a displacement of the compression member, providing a chest stiffness function representing the relationship between force and displacement based on values derived from the measured force and the measured displacement, and analyzing linearity of the chest stiffness function. Embodiments of the invention also include devices for performing the method.

A method of displacing a tessellated surface, based on features of a displacement map, by analyzing a model to determine the level of detail in the model. Where the level of detail is high the number of polygons, typically triangles, used to represent the high detail area is increased through the use of “sub-triangles”. The positions of the sub-triangles are also strategically located and constrained to better represent the high detail area, particularly any edges in the area. The level of detail can be determined using a displacement map for the surface. The positions of the triangles can be located by determining feature points (or sub-triangle vertices) in the areas of detail where the feature points can be moved toward the areas of high rate of change and additional feature points can be added. The feature points can be connected to form the sub-triangles with an emphasis or constraint on connecting points along an edge or border.

The invention relates to visual detection and image processing. Aiming to improve the resolution of an image and the measurement accuracy of a system, the technical scheme of the invention is that: a random micro-displacement-based super-resolution image reconstruction method comprises the following steps of: calculating micro-displacement by utilizing characteristic points in images of image sequences with the random micro-displacement; performing high-accuracy extraction on coordinates of the same characteristic points; setting two original images with the pixel size of 2d, the resolution of N and the sub-pixel micro-displacement of a as A and B; and setting a to-be-reconstructed image with the resolution of 2N as H, and as the image sequences are displaced and then scenes corresponding to H0 and H1 in the image are imaged only in A and not in B, in the process of reconstructing H, making equal H0, H1 and A0, performing the reconstruction according to corresponding relationships between H2, H3 and the like, and A and B and own weights of H2, H3 and the like for H2, H3 and the like, and obtaining a formula by deduction to calculate gray values. The method is mainly applied to the image processing.

The invention relates to a method for detecting reflective liquid level displacement based on angular displacement tracking, which comprises the following steps that: a light-emitting device generates a beam of visible light or invisible light through a group of lenses, and the visible light or the invisible light enters a liquid surface at a certain angle alpha to generate reflected light at the same angle; by using the other group of lenses on a receiver, the reflected light is received by a photoelectric conversion device to form images on a detection surface so as to generate electric signals, and the electric signals are treated by a circuit to determine the initial position of the liquid level as shown in a figure; when the liquid level is displaced, the emitting angle of a light beam is changed continuously in a mode of synchronous tracking to form the angular displacement of emitted light, and a light image track proportioned with the liquid level displacement can be generated on a fixed detection surface; and the distance of the liquid level displacement can be acquired according to the angular displacement through circuit and routine calculation according to a trigonometry theory, and if the time when the displacement happens is recorded at the same time, the speed of the liquid level displacement can be obtained. Because the position of the liquid level and the light beam emitting angle have a one-to-one correspondence relation, when the displacement distance is large, the angles of an emitted light beam and a receiving lens can be simultaneously changed to detect the distance and the speed to the liquid level displacement.

The invention discloses a cipher device adopting a Feistel-PG structure and an encryption method. The Feistel-PG structure consists of a round function F, the round function F maps a t*k*m bit string into a t*k*m bit string, the input X is mapped into U through linear conversion P and nonlinear conversion G, the linear conversion P is displacement based on the t*k*m bit string and is the position conversion of t*m k bit characters, the nonlinear conversion G is concatenation of t nonlinear conversions based on t*k bit string, the nonlinear conversion T is nonlinear conversion based on k*m bit string, and T converts (um-1 to u1, u0) into A (S(um-1 to u1, u0)) through S box layer and linear conversion A, wherein the S box layer is formed by m k*k s boxes through concatenation, and the linear conversion A is linear conversion based on k*m bit string. The encryption method adopting the Feistel-PG encryption structure comprises round key addition, linear conversion P and nonlinear conversion G, the output of plaintext W after the r-round iteration is used as ciphertext. Through the device and the method provided by the invention, the cipher algorithm design is more flexible, and in addition, lower realization cost can be realized at the same security intensity.

Displacement or migration of a left ventricular lead located within the coronary sinus or coronary veins of the heart is detected by comparing an electrogram (EGM) waveform pattern from the lead with a stored baseline EGM waveform pattern. Based upon the extent of lead migration, if any, a lead displacement may produce an annunciating response. The patient may be alerted, an electrical stimulus applied through the lead may be adjusted to compensate for lead migration, or an alternative electrode on the lead may be used for EGM sensing and pacing.

A positioning apparatus comprises a controller for controlling a driving device, and positions a measurement portion of an optical element. The controller displaces a drive portion of the optical element by a specific operation of the driving device, and calculate a displacement of the optical element as a first displacement based on an output from a position measuring device, calculate a displacement of the optical element caused by the specific operation as a second displacement, based on an output from a wavefront measuring device configured to measure a wavefront of light directed by the optical element, based on a difference between the first displacement and the second displacement, calibrate a position of the optical element calculated from the output from the position measuring device, and store a result of the calibration, and control the driving device based on the stored calibration result and an output from the position measuring device.

The embodiment of the invention discloses a method for measuring vibration target displacement based on laser speckles and a system thereof, relates to the vibration object displacement measurement technology, and can accurately measure the displacement of the vibration object. Light energy from an imaging component and a reflecting mirror is evenly distributed on the CCD light-sensitive surface of a photoelectric detection component to present multiple speckles and cause interference. The measured object moves in the vibration process. Speckle images are computed so as to obtain vibration information of the measured object. Interference images are computed so as to obtain overall information of vibration and displacement of the measured object. Then the two groups of information is combined to compute the displacement information of the measured object. The method and the system are mainly used for measuring the displacement of the vibration target.

The invention relates to the vehicle monitoring technology field and especially relates to a method for monitoring vehicle displacement based on a global positioning system (GPS) and a communication base station and a system thereof. In the method for monitoring the vehicle displacement based on GPS and the communication base station and the system thereof, the GPS positioning and the mobile communication base station positioning are combined. The method is characterized by: when the GPS works normally, using the GPS to position and monitor the vehicle displacement; when the GPS is not in a positioning state, using a communication module which built in a vehicle terminal to receive changes of a current service cell CELL ID so as to monitor the vehicle displacement; simultaneously, when the abnormal displacement of the vehicle is monitored, sending an abnormal displacement alarm to a monitoring center or a vehicle owner automatically through a mobile communication network so that the vehicle owner can timely adopt a measure to prevent the vehicle from stealing and avoid losses.