48results about How to "Complete measurement" patented technology

A method of and apparatus for improving vision and the resolution of retinal images is described in which a point source produced on the retina of a living eye by a laser beam is reflected from the retina and received at a lenslet array of a Hartmann-Shack wavefront sensor such that each of the lenslets in the lenslet array forms an aerial image of the retinal point source on a CCD camera located adjacent to the lenslet array. The output signal from the CCD camera is acquired by a computer which processes the signal and produces a correction signal which may be used to control a compensating optical or wavefront compensation device such as a deformable mirror. It may also be used to fabricate a contact lens or intraocular lens, or to guide a surgical procedure to correct the aberrations of the eye. Any of these methods could correct aberrations beyond defocus and astigmatism, allowing improved vision and improved imaging of the inside of the eye.

The parallel detecting spectroscopic ellipsometer/polarimeter sensor has no moving parts and operates in real-time for in-situ monitoring of the thin film surface properties of a sample within a processing chamber. It includes a multi-spectral source of radiation for producing a collimated beam of radiation directed towards the surface of the sample through a polarizer. The thus polarized collimated beam of radiation impacts and is reflected from the surface of the sample, thereby changing its polarization state due to the intrinsic material properties of the sample. The light reflected from the sample is separated into four separate polarized filtered beams, each having individual spectral intensities. Data about said four individual spectral intensities is collected within the processing chamber, and is transmitted into one or more spectrometers. The data of all four individual spectral intensities is then analyzed using transformation algorithms, in real-time.

The invention discloses an enhanced Raman and infrared double-spectrum device with a metal and graphene multi-layer resonant structure. The enhanced Raman and infrared double-spectrum device comprisesa substrate, a metal reflecting layer, a dielectric layer, metal micron antennas, graphene films and metal nano particles. The dielectric layer is located among the metal micron antennas and the metal reflecting layer, so as to form a metal-dielectric-metal reflection type micron antenna structure. The graphene films are located among the metal nano particles and the metal micron antennas, so asto form nano gaps. Under the irradiation of an infrared light wave, the antenna resonance effect of the metal micron antennas is excited; an infrared absorption spectrum signal of a trace molecule isenhanced in a wide wavelength range. Under the irradiation of laser light in a visible light waveband, the local-area surface plasmons of the metal nano particles are excited; the nano gaps among themetal nano particles and the metal micron antennas generate a high-intensity local-area electric field resonant mode; a Raman scattering signal of the trace molecule is enhanced, and the enhanced Raman and infrared double-spectrum device has the advantages of being wide in enhancement waveband, high in enhancement factor, low in cost and wide in range of the varieties of detected substances, and can be processed in a large-area manner, and the like.

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.

A device for measuring heights and/or thicknesses on a measurement object, includes (i) a first low-coherence interferometer for combining, in one spectrometer, a reference optical beam and a measurement optical beam originating from reflections of the light on interfaces of the measurement object, to produce a grooved spectrum signal with spectral modulation frequencies, (ii) apparatus for measuring an item of position information representative of the relative optical length, (iii) electronic and calculating apparatus arranged for determining at least one spectral modulation frequency representative of an optical path difference between the measurement optical beam and the reference optical beam, and for determining, by exploiting the item of information and the spectral modulation frequency, at least one height and/or thickness on the measurement object, and (iv) second optical apparatus for measuring distance and/or thickness with a second measurement beam incident on the measurement object on a second face opposite the measurement beam.

The invention provides a concrete absolute stress measurement device and method. The concrete absolute stress measurement device comprises a first stainless steel tube and a second stainless steel tube, wherein an end opening A and an end opening B of the first stainless steel tube are both openings, the second stainless steel tube is vertically arranged on the side surface, close to the end opening B, of the first stainless steel tube, an end opening C of the second stainless steel tube is an opening and communicated with the first stainless steel tube, and an end opening D of the second stainless steel tube is sealed; a first ultrasonic receiving probe is arranged in the first stainless steel tube and close to the end opening A, and an ultrasonic transmitting probe is arranged above the end opening C; a second ultrasonic receiving probe is arranged in the second stainless steel tube and close to the end opening D. Through the method, the internal real stress state of a concrete structure can be accurately and integrally measured, the measurement operation is simple and quickly, and nondestructive measurement can be realized. The concrete absolute stress measurement device is simple in structure, low in manufacturing cost, high in practicability and simple and convenient to use.

The invention discloses a graphene and metal conformal nanoprobe enhanced Raman infrared dual-spectrum device. The graphene and metal conformal nanoprobe enhanced Raman infrared dual-spectrum device comprises a substrate, a metal nanoprobe, a dielectric layer, a graphene nanoprobe, a source electrode and a drain electrode. The metal nanoprobe and the graphene nanoprobe are the same in shape. Moreover, the metal nanoprobe serves as a grid electrode, and the dielectric layer is clamped between the metal nanoprobe and the graphene nanoprobe to form a structure similar to a parallel plate capacitor. External voltage is directly applied between the metal nanoprobe and the graphene nanoprobe, so that the Fermi energy of graphene can be adjusted. Under the radiation of visible light wave band laser, the local area surface plasmons of the metal nanoprobe are stimulated, and the Raman scattering signal of trace molecules can be enhanced; and under the radiation of infrared light wave, the localarea surface plasmons of the graphene nanoprobe are stimulated, and the infrared absorption spectrum signal of the trace molecules can be enhanced dynamically in a broadband range. The device has theadvantages that the enhanced wave band can be tuned by an external electric field, the detection sensitivity is high, the detection substance variety range is wide and the stability is high.

The invention provides an artificial intelligence corn quality detection robot and a quality detection method. The artificial intelligence corn quality detection robot comprises an artificial intelligence corn quality detection robot main body and a system server, the artificial intelligence corn quality detection robot main body comprises a box body, the box body is provided with a material inletand a material outlet and is internally provided with a double-way material feeding mechanism, a conveying mechanism, an up and down double-faced machine vision mechanism and a double-way sorting mechanism, the material inlet communicates with the double-way material feeding mechanism, the double-way material feeding mechanism communicates with the conveying mechanism, the conveying mechanism passes through the up and down double-faced machine vision mechanism and communicates with the material outlet, the double-way sorting mechanism is located at the rear of the up and down double-faced machine vision mechanism, the up and down double-faced machine vision mechanism and the double-way sorting mechanism are connected with the system server, and the double-way material feeding mechanism adopts the method of a sensor and intelligent control. The invention further comprises the corn quality detection method. By means of the artificial intelligence corn quality detection robot and the quality detection method, the problem that artificial sensory detection is affected by human factors and external environment to cause detection index drift can be effectively solved, and rapid detectionis realized.

Provided are a channel measurement method for large-scale antennas, and a user terminal. The method comprises: pre-dividing antennas at a base station side into more than two groups, and a user terminal receiving pilot signals which are sent by different antennas in the same group at the base station side by adopting a frequency division manner and antennas in different groups by adopting a time division manner; and using the received pilot signals of some groups of antennas to conduct airspace channel estimation, so as to obtain channel measurement results of all the antennas. The present invention can ensure the integrity of channel measurement while reducing the pilot overhead. In addition, the user terminal has no need to conduct airspace channel estimation after waiting to receive the pilot signals of all groups of antennas, thereby reducing the time delay of channel parameter feedback.

The invention discloses a visible light heat reflection temperature measuring device. The device comprises an illumination light path used for providing an illumination pulse signal for a to-be-measured sample, a sample excitation module used for applying excitation pulse signals to the to-be-measured sample, an imaging module used for capturing illumination pulse reflection signals reflected by the to-be-measured sample and acquiring a thermal process image of the to-be-measured sample under the excitation of the excitation pulse signals, wherein the imaging module captures the illumination pulse reflection signals corresponding to the same phases of the excitation pulse signals within the same exposure period; and the phases of the excitation pulse signals corresponding to the illumination pulse reflection signals captured by the imaging module in different exposure periods are different. The thermal process image of a semiconductor device can be realized through the visible light thermal reflection temperature measuring device; and the preset duration is shortened, and the preset phase difference between the illumination pulse signals and the excitation pulse signals is reduced, so that the time precision of the thermal imaging process is improved, and the time resolution is greatly improved.

The invention discloses a multi-flexible-hinged-plate rotating vibration detection device and method, and the device comprises two flexible hinged plates, a rotating mechanism, a vibration detection mechanism and a control assembly. The two flexible hinged plates are symmetrically disposed on the rotating mechanism, and each flexible hinged plate comprises 2N+1 flexible plates which are hinged together, wherein each flexible plate is provided with a plurality of mark points through pasting. The vibration detection mechanism comprises two groups of binocular vision systems and two groups of acceleration sensors, wherein the two groups of binocular vision systems, the two groups of acceleration sensors and the two flexible hinged plates are corresponding in a one-to-one manner. Each binocular vision system is used for detecting a mark point region on the corresponding flexible hinged plate, and each acceleration sensor is disposed on the corresponding flexible hinged plate. The control assembly is connected with the rotating mechanism, the binocular vision systems and the acceleration sensors. The device effectively eliminates the impact on a vibration control effect from other uncontrollable factors, and provides conditions for the research of the control of the active vibration based on multiple sensors.

An X-ray reflectance is measured with the use of an X-ray detector, which is not less than 10⁷ cps in upper-limit counting rate and is not more than twenty cps in noise level, under the condition that a measuring time length per interval of scattering angle 2θ is not more than fifty milliseconds, so that the measurement of one reflectance curve is completed in a short time as several seconds. In another aspect of the invention, the X-ray detector used is not less than 10⁷ cps in upper-limit counting rate and is not more than 0.01 cps in noise level, and the measuring time length per interval is not less than a hundred seconds, so that the X-ray reflectance curve is obtained with not less than a nine-digit dynamic range. The X-ray detector may be an avalanche photo diode.

An isothermal-measure testing apparatus for cement initial hydration exothermic characteristic is disclosed. A sample cup of the test apparatus is put in a sample cup pool, stirring blades of a water-bath stirrer are arranged to close to radiating fins, the water-bath stirrer is eccentrically arranged in a water-bath kettle, the radiating fins of a semiconductor refrigeration/heating sheet are arranged in the water-bath kettle, one end of hydration injection water pipe is provided with a water injection port inserted by an injector, and the other end is provided with a hydration water outlet; the test apparatus comprises two thermistors, the first thermistor is at the center of the bottom of the sample cup pool and is used for sensing the sample temperature, and the second thermistor is adhered to the lower part at the outer side of the sample cup pool and is immersed into water bath and is used to sense the water bath temperature; and the temperature difference expressed by the two thermistors is taken as representation of the cement initial hydration exothermic characteristic. The test apparatus is capable of completely accurately measuring the first heat-release peak during cement initial hydration.

The invention relates to a gyro frequency characteristic measuring method and a device. According to the gyro frequency characteristic measuring method, a reciprocating rotation device is adopted forsupply a gyro with angular vibrations; data processing is carried out based on a gyro angular velocity amplitude value and an applied angular velocity amplitude so as to obtain the gyro frequency characteristics, and the gyro frequency characteristics at different frequency can be measured via changing the driving wheel rotating speed of the reciprocating rotation device; the driving wheel is a standard circular, the contour of a driven wheel is a curve, when the driving wheel rotates at a constant angular velocity omega, a relatively large rotating wheel is driven to perform periodic reciprocating rotation at f=omega/2phi. The gyro frequency characteristic measuring method is capable of realizing relatively complete measuring of gyro frequency characteristics in a relatively wide frequency range.

A device for performing a measurement of a strand-shaped object comprises at least one transmission apparatus configured to emit measuring radiation onto the strand-shaped object, which reflects the measuring radiation. At least one receiving apparatus is configured to receive the measuring radiation reflected by the strand-shaped object. An evaluation apparatus is configured to determine at least one of (1) the diameter and (2) the outer contour of the strand-shaped object based on the measuring radiation received by the at least one receiving apparatus. At least one retroreflector is configured to surround at least a portion of the strand-shaped object and retroreflect at least some of the measuring radiation reflected by the strand-shaped object.

The invention relates to the field of material mechanical performance test, and discloses a system for measuring a dynamic Poisson ratio of a brittle material. The system comprises an SHPB (Split Hopkinson Pressure Bar) horizontal impact device, a high-speed camera, a synchronous trigger, an ultra dynamic strain acquisition device and a digital image receiving device, wherein the ultra dynamic strain acquisition device is connected with the SHPB horizontal impact device, so as to acquire dynamic strain signals of incident waves, reflected waves and transmitted waves output by the SHPB horizontal impact device in real time; the synchronous trigger is electrically connected with the ultra dynamic strain acquisition device and the high-speed camera, so as to control the ultra dynamic strain acquisition device and the high-speed camera to achieve synchronous triggering and real-time measurement; and the digital image receiving device is electrically connected with the high-speed camera. The invention also provides a method for measuring a dynamic Poisson ratio of a brittle material. Through adoption of the system and the method of the invention, authenticity and reliability of dynamicPoisson ratio measurement of the brittle material can be effectively improved; and a novel method with good adaptability as well as accurate and reliable results is provided for measuring the dynamicPoisson ratio of a rock brittle material under the function of impact load.

The invention proposes a rolling element (1) for use in a rolling-element bearing (100), comprising an outer shell (2) and a bore (3), the bore (3) being preferably provided along a centre axis of the rolling element (1), the rolling element (1) comprising at least one sensor (5) for load measurement, which is arranged in the bore (3), and a transfer module for transferring the data measured by the sensor (5), the rolling element having an energy source, the energy source being provided for providing the energy required for the operation of the sensor (5) and/or of the transfer module, characterised in that the sensor (5) is a sensor that performs inductive measurement. The invention further proposes a rolling-element bearing and a method for load measurement.

The invention discloses an impact jet pressure and vibration composite measuring device and an impact jet pressure and vibration composite measuring method. The impact jet pressure and vibration composite measuring device comprises an impact jet generating device, a measuring head, a charge amplifier, a data acquisition and transmission card and an upper computer. The impingement jet flow generating device generates impingement jet flow, the measuring head monitors the pressure of the impingement jet flow, the measuring head is connected with the charge amplifier, the charge amplifier is connected with the data acquisition and transmission card, the data acquisition and transmission card is provided with a wireless data transmitting module, and data is transmitted out through wireless signals. The upper computer is provided with a wireless data receiving module for receiving jet pressure data from the data acquisition and transmission card, the upper computer is provided with LabView software for analyzing and processing the jet pressure data to obtain impact jet pressure and vibration data, and the pressure data are displayed on a display screen of the upper computer. The vibration data are stored in the upper computer in the form of a table. According to the impact jet flow pressure and vibration composite measurement device and the pressure and vibration composite measurement method thereof, the transient pressure of the impact jet flow and the pressure change and vibration signals of the impact pressure within a period of time can be obtained at the same time, and the instantaneous impact water pressure and pressure change of the jet flow can be monitored in real time; the problem that jet impact pressure is difficult to monitor in real time in the prior art is solved.