4595results about How to "Quick measurement" patented technology

A two-component monitoring device and system for monitoring blood pressure from a patient is disclosed herein. The two-component monitoring device includes a disposable component and a main component. The disposable component features: i) a backing structure having a first aperture; and ii) first and second electrodes, each electrode connected to the backing structure and including an electrical lead and a conductive electrode material, and configured to generate an electrical signal that passes through the electrical lead when the conductive electrode material contacts the patient. The main component includes: i) first and second connectors configured to connect to the first and second electrical leads to receive the first and second electrical signals; and ii) an optical component comprising a light source that generates optical radiation and a photodetector that detects the optical radiation. The optical component inserts into the first aperture of the disposable component. The main component optionally includes an acoustic sensor. The system utilizes a processing device, connected to the monitoring device by a cable which receives and processes a plurality of signals to determine real-time blood-pressure values for the patient.

The invention features a vital sign monitor that includes: 1) a hardware control component featuring a microprocessor that operates an interactive, icon-driven GUI on an LCD; and, 2) a sensor component that connects to the control component through a shielded coaxial cable. The sensor features: 1) an optical component that generates a first signal; 2) a plurality electrical components (e.g. electrodes) that generate a second signal; and, 3) an acoustic component that generates a third signal. The microprocessor runs compiled computer code that operates: 1) the touch panel LCD; 2) a graphical user interface that includes multiple icons corresponding to different software operations; 3) a file-management system for storing and retrieving vital sign information; and 4) USB and short-range wireless systems for transferring data to and from the device to a PC.

Method and apparatus for reflected imaging analysis. Reflected imaging is used to perform non-invasive, in vivo analysis of a subject's vascular system. A raw reflected image (110) is normalized with respect to the background to form a corrected reflected image (120). An analysis image (130) is segmented from the corrected reflected image to include a scene of interest for analysis. The method and apparatus can be used to determine such characteristics as the hemoglobin concentration per unit volume of blood, the number of white blood cells per unit volume of blood, a mean cell volume, the number of platelets per unit volume of blood, and the hematocrit. Cross-polarizers can be used to improve visualization of the reflected image.

This document describes an optical sensor unit and a procedure for the specific detection and identification of biomolecules at high sensitivity in real fluids and tissue homogenates. High detection limits are reached by the combination of i) label-free integrated optical detection of molecular interactions, ii) the use of specific bioconstituents for sensitive detection and iii) planar optical transducer surfaces appropriately engineered for suppression of non-specific binding, internal referencing and calibration. Applications include the detection of prion proteins and identification of those biomolecules which non-covalently interact with surface immobilized prion proteins and are intrinsically involved in the cause of prion related disease.

A method and system for full-field fringe-projection for 3-D surface-geometry measurement, referred to as “triangular-pattern phase-shifting” is disclosed. A triangular grey-scale-level-coded fringe pattern is computer generated, projected along a first direction onto an object or scene surface and distorted according to the surface geometry. The 3-D coordinates of points on the surface are calculated by triangulation from distorted triangular fringe-pattern images acquired by a CCD camera along a second direction and a triangular-shape intensity-ratio distribution is obtained from calculation of the captured distorted triangular fringe-pattern images. Removal of the triangular shape of the intensity ratio over each pattern pitch generates a wrapped intensity-ratio distribution obtained by removing the discontinuity of the wrapped image with a modified unwrapping method. Intensity ratio-to-height conversion is used to reconstruct the 3-D surface coordinates of the object. Intensity-ratio error compensation involves estimating intensity-ratio error in a simulation of the measurement process with both real and ideal captured triangular-pattern images obtained from real and ideal gamma non-linearity functions. A look-up table relating the measure intensity-ratio to the corresponding intensity-ratio error is constructed and used for intensity-ratio error compensation. The inventive system is based on two-step phase-shifting but can be extended for multiple-step phase-shifting.

Provided is a method for localization message process. The method includes allocating cluster resources for recognizing a location of a mobile node, setting operation of each node by deciding a cluster operation state for the mobile node, measuring distances between the mobile node to each of anchor nodes, and recognizing a location of the mobile node.

The invention discloses a method for measuring object deformation in real time, which comprises the following steps: arranging and adjusting measuring equipment, namely symmetrically arranging two cameras and corresponding LED illumination lamps above a measured object, and making optical axes of the two cameras intersected in a distance of 1 meter in front of the cameras; then calibrating the cameras, namely tightly sticking mark points to the surface of an object to be measured according to the size and shape of the measured object and the measurement requirement; next, placing the measured object stuck with the mark points under the two cameras in about 1 meter or moving the whole measuring equipment to make the measured object enter a measurement range and enable each camera to acquire the mark points on the surface of the measured object, starting the two cameras to shoot sequence images, and acquiring digital images; then identifying and positioning the images; reversely solving a projection matrix according to the calibration result of the cameras, and combining image coordinates of the solved mark points on the surface of the measured object on the images of the two cameras to reconstruct a three-dimensional coordinate of the mark points; and finally, carrying out deformation analysis and calculation for the mark points on the surface of the measured object.

A method for real-time optical diagnostics in laser ablation and laser processing of layered or structured materials or material structures. Diagnostics is provided during laser ablation that is utilized regularly in laser processing and/or chemical analysis of structured materials, by means of measuring optical emission generated as a result of the pulsed laser-material interaction in real time. The method can involve a single-layer-film or a stack of multiple layers or a structure of different domains. The method is particularly beneficial in fabrication of thin-film structures, such as photovoltaic and electronic devices or circuits of devices.

Systems and methods of the present invention measure at least one reflecting surface of an object disposed along an optical path. In some embodiments a measured optical interference signal for each of at least three wavelengths of reflected light may be used to determine a modulation of frequency components of a Fourier series. Frequency components of a Fourier series may be transformed to spatial components that describe intensities and positions of light reflected along an optical path. Systems and methods of the present invention permit rapid measuring and may monitor corneal thickness during surgery. The invention may do so by integrating an ablation device and a measurement apparatus into a single system. An integrated scanning and monitoring system may include an ablative light source producing an ablative beam and a measurement light source producing a measurement beam.

The invention relates to high optical spectral image technique without harm to agricultural products. It can reflect the appearance of the agriculture products like color, shape, texture, dimension, scar and son on, and internal features like hardness, protein content and connected with knowledge base and experience of experts to make judgment. It can make quick, accurate, timely judgment of products, controlling the overall production with guarantee of the agriculture quality.

The invention discloses a video-image-based method for detecting a non-contact vital sign. The method comprises the following steps of: acquiring video images continuously according to a fixed frame frequency, detecting a region of interest (ROI) region automatically, separating a vital sign signal from a multichannel signal separated from the ROI region, extracting the frequency of the vital sign signal and converting the frequency into the vital sign to acquire a detection result. The invention also discloses a video-image-based system for detecting the non-contact vital sign. The method and the system have the advantages of quickness, real time, capacity of realizing continuous monitoring, high robustness, low cost, wide application range and the like.

Systems and methods for downhole formation testing. The invention is based on the use of one or more elongated sealing pads capable of sealing off and collecting or injecting fluids from elongated portions along the surface of a borehole. The, modified probe pads of a device-made in accordance with the invention increase the flow area by collecting fluids from an extended portion along the surface of a borehole, which is likely to straddle one or more layers in laminated or fractured formations. A tester device using the elongated sealing pads is capable of fast deployment and withdrawal to speed up the measurement cycles. Various designs and arrangements for use with a fluid tester, which may be part of a modular fluid tool, are disclosed in accordance with different embodiments.

A method for determining a desired location at which to apply a neural therapy. An array of electrodes is positioned proximal to neural tissue. A stimulus is applied from the array which evokes a neural compound action potential response in the neural tissue proximal to the array. A plurality of electrodes of the array simultaneously obtain respective measurements of the neural compound action potential response. From the measurements of the neural compound action potential response a desired location for a neural therapy is determined.

The present invention relates to a biosensor which comprises an electrode system including at least one pair of electrodes, at least one insulating base plate for supporting the electrode system, a first reaction layer provided at least on a working electrode of the electrode system, including an organic compound having a functional group capable of bonding or being adsorbed to an electrode and a hydrophobic hydrocarbon group, a second reaction layer provided on the first reaction layer, including an amphiphilic lipid capable of bonding or being adsorbed to a hydrophobic portion of the first reaction layer, and a reagent system carried in a two-component membrane composed of the first and second reaction layers, including at least membrane-binding type pyrroquinoline quinone-dependent glucose dehydrogenase and an electron mediator.

The invention relates to a method for measuring circular tunnel convergence deformation. The method includes the steps of S1, by a three-dimensional laser scanner, acquiring the working base point coordinates and tunnel point cloud of each observation station; S2, using working base points as splicing datum points to merge the tunnel point cloud into a unified reference coordinate system, and segmenting into point cloud of a multi-ring pipe joint according to the pipe joint; S3, fitting the point cloud of a single-ring pipe joint into a cylindrical face according to an improved cylindrical face fitting algorithm, extracting pipe joint axis point coordinates, projecting the cylindrical face to a plane along the axis direction of the pipe joint to obtain a two-dimensional tunnel point cloud contour line, and fitting into an ellipse according to an ellipse fitting algorithm; S4, expanding the ellipse into a three-dimensional elliptic cylindrical surface along the axis so as to obtain the three-dimensional convergence deformation of a whole tunnel. Compared with the prior art, the method has the advantages that the longitudinal axis and convergence deformation of the tunnel under construction and the tunnel under operation can be acquired, monitoring point laying is not needed, high measuring efficiency is achieved, and comprehensive monitoring data is provided to tunnel construction and operation.

The invention relates to a calibration technology for multiple structured light projected three-dimensional profile measuring heads, discloses a technology for calibrating multiple structured light projected three-dimensional profile measuring heads in different directions, which can be used for the quick label-free measurement of an object profile projected by structured light, and belongs to the technical field of optical measurement. In the calibration technology, only a calibration object of a plane with a plurality of calibration patterns is required to be designed and is not required to be manufactured into a high-precision three-dimensional target with known geometrical relationships on all surfaces; and geometrical parameters among all planes of the calibration object can be obtained by a close-range photogrammetry technology to upgrade the calibration object into the three-dimensional target, so the difficulty of machining and maintaining the high-precision three-dimensional target directly is reduced. By utilizing the technology, multiple structured light projected three-dimensional profile measuring heads can be measured from different visual angles in a label-free mode, and point clouds scanned in different directions are unified to one coordinate system automatically, so error accumulation caused by splicing is avoided effectively, and the time of the three-dimensional appearance reconstruction of the object can be shortened.

The invention discloses a method for quickly measuring a blade of a large-sized water turbine, which is characterized by comprising the following steps: firstly, sticking a mark point to the surface of the blade, then shooting a group of photos from different angles as measured primary data, and inputting the data to a computer to carry out analytic processing; by carrying out image detection for the group of photos in a measurement software, identifying the mark point in each photo and positioning the center of the mark point, and matching the mark points with the same name; finally, reconstructing a three-dimensional coordinate of corresponding object points according to a plurality of two-dimensional coordinates of the mark points, fitting a sparse framework model of a target by the reconstructed three-dimensional mark points, then scanning the surface of the blade block by block by using a binocular grating scanning method to acquire a local dense point cloud, and aligning the dense point cloud to an overall coordinate system according to the local mark points to acquire a dense point model of the blade; and by comparing the dense point model with a CAD designed model after aligning, calculating a three-dimensional processing error of the surface of a workpiece.

The electron beam is irradiated several times at predetermined intervals to the wafer surface on which the plugs are exposed in the course of the manufacturing process so that the pn junction is in the reverse bias state. Then, the irradiation conditions of the electron beam are changed while monitoring the charging voltage on the plug surface, and the secondary electron signals of the circuit pattern are obtained under the irradiation conditions that the charging is within a desired range, thereby evaluating the leakage property. Since the charging voltage of the pn junction is relaxed depending on the magnitude of the leakage current during the interval, the leakage property is evaluated based on the luminance signals of the voltage contrast image. By measuring the charging voltage and setting it within a desired range, the evaluation result reflects the state in the actual operation. Therefore, the accuracy is enhanced.

The invention discloses an LED optical parameter comprehensive testing device, belonging to the technical field of optical parameter measurement. The LED optical parameter comprehensive testing device is technically characterized in that one end of a horizontal base provided with a one-dimensional mobile platform is fixedly provided with an arc-shaped clamp provided with a fiber-optic probe and astandard luminosity probe, the other end of the horizontal base is fixedly provided with an arc-shaped light collector consisting of an arc fiber-optic array and a linear array CCD (Charge Coupled Device), and a rotary clamping table for holding an LED to be tested is arranged on the one-dimensional mobile platform; light information acquired by the fiber-optic probe is converted into a spectrum band by a spectrograph and then is sent into a computer, outputs of the standard luminosity probe and the linear array CCD are sent to the computer through the data acquisition unit, the computer performs corresponding processing and operation on measurement data through measurement software to finally obtain the luminescence characteristics of the LED to be tested. According to the invention, theproblem on comprehensively measuring the LED on a single measurement instrument is solved; and the LED optical parameter comprehensive testing device has the characteristics of simplicity for operation, compact structure, fastness for measurement, easiness for realization and the like.

A distributed fiber optic sensor simultaneously interrogates the sensing fiber with two counter propagating light beams. One beam is set to a constant frequency. The second beam is modified to contain a “comb” of frequencies, with each frequency component in the comb offset by a predetermined amount. Each of the frequency components in the comb, herein referred to as teeth, is able to interact with the counter-propagating beam through the Brillouin scattering process. With proper selection of the comb characteristics such as the number of teeth, the frequency spacing of teeth, the spectral width of teeth, and the relative amplitude of the teeth, a representation of the Brillouin spectrum at each point in the fiber can be obtained simultaneously with a single pass through the fiber.

The present invention provides novel apparatus and methods for fast quantitative measurement of perturbation of optical fields transmitted, reflected and/or scattered along a length of an optical fibre. The present invention can be used for point sensors as well as distributed sensors or the combination of both. In particular this technique can be applied to distributed sensors while extending dramatically the speed and sensitivity to allow the detection of acoustic perturbations anywhere along a length of an optical fibre while achieving fine spatial resolution. The present invention offers unique advantages in a broad range of acoustic sensing and imaging applications. Typical uses are for monitoring oil and gas wells such as for distributed flow metering and/or imaging, seismic imaging, monitoring long cables and pipelines, imaging within large vessel as well as for security applications.

Provided is an aircraft component digitized flexible assembling measuring method based on a laser tracking measuring technique. The assembling measuring method comprises the following steps of (1) carrying out preparation work of assembling measurement, (2) carrying out work of the assembling measurement, and (3) carrying out parallel collaborative measurement in real time. The aircraft component digitized flexible assembling measuring method based on the laser tracking measuring technique relates to the combination of an assembling technique and the measuring technique, the theoretical position information of engineering data concentrated product digital analogy is compared with the coordinates, obtained by a laser tracking instrument in real time, of reference points of assembly parts to form positional deviation, the positional deviation is transmitted to a movement control system, the movement control system generates tool pose control instructions by analyzing the positional deviation and transmits the tool pose control instructions to a flexible tool, the flexible tool drives a workpiece to adjust poses together, and through the coordinated operation of the movement control system, the flexible tool and the workpiece, a closed loop control system is formed to complete the assembling work. The aircraft component digitized flexible assembling measuring method based on the laser tracking measuring technique has good practical value and wide application prospect in the laser tracking measuring technique and the aircraft digitalized assembling field.