2251 results about "Non contact measurement" patented technology

A hand-held mobile communication device, such as smart telephone, incorporating sensors and signal conditioning modules for measuring signals from external sources of electromagnetic radiation (EMR) in the low, radio, ultraviolet, and infrared spectral ranges. These include the detector for receiving and monitoring electromagnetic fields originating from various external sources of radiation that pose potential health hazards or may interfere with various electronic devices. The mobile phone equipped with such sensors could alternate between communication and monitoring functions. Other integrated EMR sensors are a photodiode for the ultraviolet detection to monitor the user's sun exposure and a thermopile for non-contact measurement of temperature of humans or inanimate objects. This infrared sensor in combination with a photographic digital camera and a pattern recognition signal processing allows measuring temperatures at specific locations and from optimal distances to the surface of the object to enhance accuracy of non-contact temperature measurements.

Provision is made of an apparatus and a method for the manufacture of three-dimensional objects (3) by local solidification of layers of a building material at positions corresponding to the respective cross-section of the object (3), by exposure to electromagnetic or particle radiation. The apparatus comprises a temperature measuring assembly (13) for non-contact measurement of the temperature of the building material in a measurement region (14) which is a partial region of the layer of the building material, and comprises further a position adjustment device (15) for altering the position of the measurement region (14) of the temperature measuring assembly (13) independently of the alteration of the position of the region exposed to the radiation energy. This apparatus can be used to actively access a not exposed region of the surface for measuring the temperature of each layer and to detect a temperature distribution by altering the position of a measurement region (14) in a layer.

In the color imaging system, multiple rendering devices are provided at different nodes along a network. Each rendering device has a color measurement instrument for calibrating the color presented by the rendering device. A rendering device may represent a color display in which a member surrounds the outer periphery of the screen of the display and a color measuring instrument is coupled to the first member. The color measuring instrument includes a sensor spaced from the screen at an angle with respect to the screen for receiving light from an area of the screen. A rendering device may be a printer in which the measuring of color samples on a sheet rendered by the printer is provided by a sensor coupled to a transport mechanism which moves the sensor and sheet relative to each other, where the sensor provides light from the sample to a spectrograph. The color measuring instruments provide for non-contact measurements of color samples either displayed on a color display, or printed on a sheet, and are self-calibrating by the use of calibration references in the instrument.

A power tool control system allows a user to operate a power tool through a graphical user interface communicatively coupled with a non-contact measurement and alignment device. The graphical user interface correlates user engageable selectors with a logically related menu of power tool setting options displayed on a display screen in a high quality and easily readable format. The non-contact measurement and alignment device uses one or more lasers to determine power tool settings and establish proper alignment based on user needs. The power tool control system further enables stud detection and visual indication of stud location.

A method of automatically docking a boarding bridge (1, 2) to a door (3, 4) of an aircraft (5) at an airport boarding gate, wherein the aircraft is detected by non-contact measurement of its distance from a fixed point Taken to and parked at a predetermined location, and where a control computer (14) is used to control the movement of the boarding bridge, and the person is required to give a start signal (24) after establishing the correct type of aircraft and the correct pattern for that type of aircraft , so that the control computer prompts the boarding bridge to move and dock.

A modular measurement device is provided for quickly and accurately performing non-contact measurements of various objects at different locations within a commercial or residential work area. The modular measurement device generally includes a laser base that is operable to project light onto a measured object; and a portable measurement module adapted to receive light reflected from a surface of the measured object and operable to determine dimensional measurement data for the measured object, where the portable measurement module is configured to releasably couple to the laser base. The operational components of the measurement device are partitioned between the portable measurement module and the laser base. In this way, a single portable measurement module having more expensive operational components may be used with different, less expensive laser bases, where each laser base may be adapted for a different application.

The invention relates to a non-contact measuring method for a leaf apex radial clearance of an engine rotor, and the method comprises the following steps: 1) assembling a measuring system, calibrating a sensor and determining the relation between the radial clearance and voltage of a leaf apex; 2) preparing before measuring; and 3) measuring the leaf apex radial clearance of the engine rotor. In the measuring method provided by the invention, a measurement technique based on a capacitance method is adopted; the measuring course and the assembling are synchronously carried out; the once cartridge disassembly and assembly is reduced; the measuring time is shortened; the production efficiency is improved; and the measuring accuracy is improved, thereby improving the assembly quality of an engine and reducing the failure rate of the engine. The non-contact measuring method provided by the invention is mainly used for measuring the leaf apex radial clearance of the rotors of parts such as an engine, a high-pressure compressor, a low-pressure compressor, a high-pressure turbine, a low-pressure turbine and the like.

The invention discloses an accurate part positioning method based on binocular microscopy stereo vision, which belongs to the technical field of computer visual measuring and relates to an accurate precision part positioning method based on the binocular microscopy stereo vision. A binocular microscopy stereo vision system is adopted, two CCD (charge coupled device) cameras are adopted to acquire the images of the measured parts, the image information in the to-be-measured area on the measured part is amplified by a stereo microscope, a checkerboard calibrating board is adopted to calibrate the two CCD cameras, and a Harris corner point detecting algorithm and a sub-pixel extracting algorithm are adopted to extract feature points. The extracted feature points are subjected to the primary matching and correcting of matching point pairs, and the feature point image coordinates are inputted to a calibrated system to obtain the space actual coordinates of the feature points. The accurate part positioning method based on the binocular microscopy stereo vision solves the measuring difficult problems generated by the small size of the to-be-measured area, high positioning demand, non-contact and the like. The accurate positioning of the precision part is well finished by adopting the non-contact measuring method of the binocular microscopy stereo vision.

An image-based, non-contact measurement method and system for determining spatial characteristics and parameters of an object under measurement. Image capturing devices, such as cameras, are used to capture images of an object under measurement from different viewing angles. A data processing system performs computations of spatial characteristics of the object under measurement based on the captured images.

The invention, which belongs to the technical field of industrial measurement, discloses a non-contact measurement apparatus of inner and outer diameters of a large-diameter circular ring type component. According to the apparatus, a rotation platform (2) drives to-be-measured circular ring type components to make rotation; a non-contact laser displacement sensor is used for measuring the inner diameters and the outer diameters of the to-be-measured circular ring type components (4); and measurement of the to-be-measured circular ring type components (4) with different dimensions can be realized based on fine tuning of a lifting platform (3) and an inner-outer diameter adjusting rack (5). With the apparatus, automatic non-contact measurement of the inner diameter, outer diameter, thickness, and ovality of a circular ring type component can be realized; the measurement error is small; the operation is simple and convenient; the measurement speed is fast; and the work efficiency is high. The provided measurement apparatus is suitable for bath detection occasions of large-diameter circular ring type component production and processing enterprises.

The invention provides a composite three-dimensional point laser measurement system and a measurement method, comprising three-dimensional scanning and three-dimensional detection. Normal optical scanning is adopted so as to obtain the profile information of the article quickly and establish a three-dimensional model; motion trajectory planning is carried out by the profile data; and a point laser probe is guided to carry out more precise measurement so as to obtain the three-dimensional point cloud data of higher precision and higher quality. The three-dimensional non-contact detection to the characteristic position, appointed section line and integer of the workpiece is obtained further on the basis of comparing the point cloud and model data. The system and the method have the advantages that the non-contact measurement can obtain the point cloud of good quality and high precision, the article can be positioned freely, precise clamping devices are not needed, the measurement speed is quick, the process is automatic and the measured article has wide applicable range.

Combined equipment for non-contacting determination of axial length (AL), anterior chamber depth (VKT) and corneal curvature (HHK) of the eye are also important for the selection of the intraocular lens IOL to be implanted, particularly the selection of an intraocular lens IOL to be implanted, preferably with fixation of the eye by means of a fixating lamp and / or illumination through light sources grouped eccentrically about the observation axis.

The invention provides a device and a method for testing mechanical properties such as stretching, compression, bending, fracture toughness, shear strength and deformation of a high-temperature material in an ultrahigh temperature oxidation atmosphere in a temperature range from normal temperature to 1,800 DEG C. The experimental device is formed by assembling an electric control cabinet, a loading clamp, a load control and deformation sensing measurement system, a furnace body, a non-contact deformation measurement system, a display recording system and the like. According to the method, a furnace oxidation environment is uniformly and stably heated and kept through a heating body, so that the mechanical properties can be tested at temperature range from the room temperature to 1,800 DEG C, and mechanical property parameters such as stretching, compression, bending, shear strength and strain are captured by utilizing the contact sensing system and the non-contact measurement system. The device has the greatest characteristics of multiple testing parameters, high data measurement precision and high experimental repeatability.

A method for tomographic imaging of diffuse medium includes directing waves into a diffusive medium, solving a surface-bounded inversion problem by forward field calculations through decomposition of contributions from the multiple reflections from an arbitrary surface within the diffusive medium or outside the diffusive medium into a sum of different orders of reflection up to an arbitrary order, and using contact or non-contact measurements of waves outside said diffusive medium to generate a tomographic image.

The invention discloses a three-dimensional speckle strain measurement method, comprising: (1) speckle preparation; (2) camera calibration; (3) state information acquisition; (4) computational domaindesignation; (5) initial point setting; (6) speckle matching; (7) three-dimensional reconstruction; and (8) strain computation. By the above operation steps, the invention provides a three-dimensionalspeckle strain measurement method, which can effectively obtain high preciseness measurement results in measurements of material characteristic parameters such as full-field vibration measurement, dynamic strain measurement, high speed deformation measurement, fracture mechanics, impact excitation and dynamic material experiments. The invention has the characteristics of convenient measurement operation, high automation degree, exact and reliable results, high efficiency and non-contact measurement.

The invention relates to a method for measuring key physiological parameters in noncontact manner, such as blood pressure and its change rate, electrocardiogram, blood oxygen saturation, respiratory frequency, and heart rate and its change rate. The key physiological parameters can be measured by analyzing plethysmographic signals and bioelectric signals collected by a sensor or a probe without contacting human body. The device adopted in the method has wider application scope than the conventional contact measurements, can be applied in particular environments such as mobile ambulance or battle field treatment, and can also be integrated in auxiliary facilities such as bathtub, bed and coach in everyday life. The device has the advantages of simple and easy operation, no affect to users' activities during measurements of physiological parameters, and no requirement of active intervention of users, and can provide safe, economical and practical, nondestructive real time continuous monitoring of physiological parameters for users.

A system and process for creating custom fit artificial fingernails using a non-contact measuring device is disclosed. A fingernail is measured for its topographical configuration by an optical non-contact measuring device. The measured topography of the fingernail is then used to direct a machining device to create an artificial fingernail. Also disclosed is a method to digitally design an artificial fingernail, which has a portion of its under surface fitted to the natural fingernail by using a special computer program. The three-dimensional shape information of the digitally designed artificial fingernail is then converted into machine codes to drive a computer numerical controllable device, which will then cut the artificial fingernail from a piece of raw material. Finally, the user selected nail art can be printed onto the artificial fingernail by using a nail art printing device.

The invention relates to high-precision in-situ detection for complicated curved-surface parts with high-curvature surface form. In order to provide non-contact for the parts and detection for the surfaces of the parts, the invention provides the following technical scheme, namely a high-precision non-contact measurement method and a high-precision non-contact measurement device for a three-dimensional profile of an optical freeform curved surface. A grating projection device is used for projecting a sine grating stripe onto the surface of a measured object; an image acquisition device acquires a deformed stripe pattern modulated by the surface of the measured object and sends the deformed stripe pattern into a computer to recover the three-dimensional profile of the surface of the measured object; a white light scanning interference measuring head is used for scanning and measuring local characteristics of the measured object in nano-scale precision; a white light scanning image acquisition device acquires an interfered stripe pattern and sends the interfered stripe pattern into the computer to acquire data of the three-dimensional profile of a measurement region; and a result can be obtained according to data obtained by measurement of a grating projection vision detection unit and a white light scanning interference measurement unit through a multi-sensor massive data combination algorithm and corresponding error separation and compensation measures. The invention is mainly applied to the high-precision in-situ detection of the parts.

The invention discloses a vision extensometer implementation method based on digital speckles. The method includes the first step of speckle and mark making, the second step of binocular camera calibration, the third step of speckle image acquisition, the fourth step of image subarea specifying, the fifth step of image correlation matching, the sixth step of three-dimensional coordinate reconstruction and the seventh step of deformation calculation. Through the operating steps, the vision extensometer implementation method based on the digital speckles can be used for accurately measuring the deformation of materials in the tensile experiment process and has the advantages of being convenient to operate, capable of achieving non-contact measurement, accurate and reliable in measuring result and the like.

Disclosed is a circuit board fault infrared image automatic detection method. The image information of the working state of a circuit board is obtained by collecting a visible light image and an infrared image simultaneously. First, a visible light image and an infrared image of a circuit board working normally are collected and stored in a database. During detection of the circuit board which malfunctions, circuit board images (including a visible light image and an infrared image) taken are compared with the images under a normal state in the database, and a computer processes the images to find an area and a specific position where a component or line with abnormal temperature is located and automatically make a mark on the visible light image. Thus, automatic detection of a possible faulty component of the circuit board is completed. The technology can be applied to fields such as circuit board maintenance and equipment fault monitoring, and can also be applied to power equipment fault repair, petrochemical pipeline coke plugging, thermal insulation layer fall-off check, railway locomotive axle condition monitoring, fire prevention, flood control, disease prevention and other temperature change related non-contact measurement fields.

A stereoscopic vision detecting method for measuring three-dimensional morphology on a strong reflection surface is provided. A traditional stereoscopic vision detecting method based on the sine stripe projection comprises steps of stripe projection, image collection, phase resolving, stereoscopic matching and three-dimensional recurrence, and the invention adds new technologies, such as bright-dark stripe projection, image collection in long exposure time, image synthesis within high dynamic range and the like in the steps of the strip projection and the image collection, which overcomes saturated or darker stripe images caused by the strong reflection surface, and can realize the non-contact optical measurement of three-dimensional morphology on the strong reflection surface such as metal. The detecting method has the characteristics of simpleness, flexibility and excellent reliability, and can be used for the optical non-contact measurement of three-dimensional morphology on the strong reflection surface such as metal.

The invention relates to high-precision detection of complex optical curved-surface parts with large-curvature surface shapes, and aims to provide a high-precision detection method for the complex curved-surface parts with large curvature surface shapes, such as optical curved-surface parts, which has the advantages of rapidity, non-contact and no damage to part surfaces and surface layers. The technical scheme adopted by the invention is that the invention provides a grating projection rapid non-contact measurement method and device for high-reflectance free-form curved-surface parts, and the method comprises the following steps that: three degree-of-freedom motion of a measured object is realized with the help of a precision motion control system; coded grating fringes are projected onto the surface of the measured object by using a grating projection device; phase distribution information of the surface of the measured object is obtained from a deformed fringe pattern by using a digital phase shifting technology and a phase unwrapping algorithm; reference phase distribution information is obtained by using a virtual reference surface technology; and three-dimensional morphological information of a measuring area of the surface of the measured object is recovered according to a corresponding relation between phase deviation information and the gradient of the surface of the measured object. The grating projection rapid non-contact measurement method and device are mainly applied to the measurement of the optical curved-surface parts.

The invention discloses a robot kinematics calibration method based on vision measurement and a distance error model. The method includes the steps that a corrected robot D-H model is established; the distance error model is established; a robot kinematics calibration model is established; simultaneous calibration of a hand-eye relation and kinematics parameters is performed; measurement of an actual coordinate position of a tail end is performed; robot D-H parameters are corrected; and experimental verification is conducted. The robot kinematics calibration method based on vision measurement and the distance error model and provided by the invention has the advantages of being simple, efficient and fast; a non-contact measurement mode of vision detection is adopted; meanwhile, repetitive errors of hand-eye calibration are considered, and the calibration model is simplified through a mode of an equidistance model; and accordingly, the positioning precision and distance precision of an industrial robot can be greatly improved, the robot kinematics calibration method is universally suitable for series connection joint-type robots, and certain practical significance is achieved.

Optical methods and devices for the thermal detection and imaging of infrared, sub-millimeter, millimeter and high energy radiation, wherein the thermal mass of the detector is minimized by the use of microscopic photoluminescent temperature probes having a weight mass which can be of the order of 10−11 grams or smaller. Used for detection of high energy radiation, including quantum calorimetry, said temperature probes allow non-contact measurements free of electrical sources of noise like Johnson noise or Joule heating.

A hand-held mobile communication device, such as smart telephone, alone or in protective case, incorporating sensors and signal conditioning modules for measuring signals from external sources of electromagnetic radiation (EMR) in different spectral ranges. These include detector monitoring EMR that pose potential health hazards or may interfere with various electronic devices. Other integrated EMR sensor is a photodiode for the ultraviolet detection to monitor the user's sun exposure and a thermal infrared detector for non-contact measurement of temperature of humans or inanimate objects. This detector in combination with a digital camera and a pattern recognition signal processing allows accurate non-contact measuring temperatures at specific location.

The invention provides a measurement method of automatically acquiring outline dimension of human body by shooting human body image with an image acquisition device and analyzing the image through specific algorithm, and relates to a measurement system for implementing the non-contact measuring method. In the invention, a human body is in a shooting room, a two-dimensional image of the human body is acquired by an image generator, and the image generator processes the two-dimensional image, generates three-dimensional characteristic points of the human body and eventually calculates the needed human body figure data according to the three-dimensional characteristic points of the human body. Compared with the prior art, the invention directly arranges the marking points for calibrating on a background wall, processes specific algorithm by means of designing a large amount of images and provides a technical proposal that can realize fully automatic physical measurement of the human body, thereby significantly simplifying complicacy of the device and the operation and increasing the consistency and accuracy of the measurement.

A non-contact imaging apparatus for examining an object having complex surfaces or shape deformations. The imaging apparatus includes at least one imaging device for obtaining a scanned image of the exterior surfaces of the object being examined. A predetermined reference image) of an ideal model for the object is stored in a memory. An image register is coupled to the imaging device and to the memory containing the reference image of the ideal model for the object. A transformation estimator compares the scanned image to the reference image and provides a transform which maps the scanned image to the reference image and provides a set of registered object data points. One or more filter modules process the registered object data points with a priori information to reduce noise and to further enhance the accuracy and precision of the registration. A gauge estimator is coupled to the filter module. The gauge estimator utilizes the processed and registered object data to determine deformation parameters of the object, which are then displayed to an operator as gauging information.