13results about How to "Efficient measurement" patented technology

In a measurement processing apparatus for measuring a geometric feature of an object image: a measurement-reference-element setting unit automatically sets at least one first measurement reference element for use in measurement of the geometric feature of the object image, at at least one first position on the object image based on first image data representing the object image and position information indicating at least one second position of at least one second measurement reference element which is set on a measurement reference image corresponding to the object image; and a geometric-feature measurement unit measures the geometric feature of the object image based on the at least one first position of the at least one first measurement reference element.

This invention discloses an experimental method for measuring the electron-hole recombination emission rate. The apparatus for this method includes a laser chip (with an anti-reflection coating on only one end of its horizontal two-sided end face), a plano-convex lens, a polarizer, a fiber optic coupler, an optical fiber, and a spectrometer. The plano-convex lens, polarizer, plano-convex lens, and fiber optic coupler are placed sequentially on the same horizontal line on both sides of the chip. The fiber optic coupler is connected to the spectrometer via an optical fiber. First, energy is applied to the laser chip, causing it to emit light from both sides. The spectra from both sides are focused onto the fiber optic coupler by the plano-convex lens and then transmitted to the spectrometer via the optical fiber. By rotating the polarizer, different polarization spectra can be selected to obtain specific spectral images under transverse electric / magnetic field modes. Finally, by substituting the spectral data from both ends into the established formula, the electron-hole recombination rate of the laser chip can be calculated.

This invention discloses a relay-type large strain monitoring steel strand and its manufacturing and usage methods. It is applicable to large strain monitoring of various types of steel strand components in civil engineering. By embedding corresponding fiber optic strain sensing fibers in grooves corresponding to the relaxed and tensioned states of irregularly shaped steel wires, applying adhesive and wrapping with a sheath for fixation, and then twisting them with edge wires to form a steel strand, it is possible to achieve quasi-distributed dense monitoring of large strain along the entire length of the strand itself. The strain monitoring range at each point is up to 8000με, which solves the problem of difficult monitoring of large strain along the prestressed steel strand in concrete structures. In addition, the segmented relay-type large strain monitoring steel strand structure based on weak grating sensing has its own fiber optic lead, which is convenient and quick to use and easy to promote and apply.

This invention discloses a nuclear magnetic resonance (NMR) method for measuring the solid phase deposition of crude oil in porous media, belonging to the field of oil and gas reservoir development technology. By using a single saturation of crude oil in a core sample and leveraging the characteristics of online NMR technology, the method employs a comparison of experimental and NMR measurements, along with a 1:1 standard line reference, to determine the standard echo interval T in the transverse relaxation time T2 measurement acquisition parameters. E This method directly measures the amount of solid phase deposition in pore fluids in situ, solving the technical problems of existing technologies that cannot maintain the original characteristics of the sample, effectively avoid the interference of solid skeleton response and solid phase deposition particles, and are difficult to measure the solid phase deposition content of active oil in situ. It achieves the technical effect of rapid, efficient and accurate measurement of the amount of crude oil solid phase precipitation in cores under specific temperature and pressure conditions. The method is reliable in principle, simple to operate and highly applicable, and the test results are accurate and reliable, making it more suitable for the fine characterization needs of complex oil and gas reservoirs.

This invention relates to the field of precision measuring instruments, and discloses a high-precision roller spherical base surface measuring device and method. The high-precision roller spherical base surface measuring device includes: a measuring instrument body, a measuring head mounted on the measuring instrument body, a clamping mechanism, an identification measuring mechanism, and a control terminal; the clamping mechanism includes: a clamping component, a rotation drive component, and a pre-support component. The clamping component is mainly used to clamp the roller to be measured, and the rotation drive component is connected to the clamping component, mainly used to drive the clamped roller to rotate around a theoretical axis. This invention automatically identifies the roller size and determines the optimal clamping parameters through machine vision, and combines three-dimensional scanning to calibrate the clamping posture in real time. It can dynamically generate an adaptive measurement path based on the measured deviation, effectively solving the system error problem caused by inconsistent clamping in traditional measurements, significantly shortening the measurement time for a single piece, and achieving efficient and reliable measurement of the tapered roller spherical base surface with micron-level accuracy.

This application discloses a method, apparatus, ultrasound device, and storage medium for detecting cardiac ultrasound data. The method includes: acquiring cardiac ultrasound data to be detected; extracting image features from the cardiac ultrasound data and determining the target section type corresponding to the cardiac ultrasound data based on the image features; when the target section type is a parasternal left ventricular long-axis section, determining the target section image for display from the cardiac ultrasound data; determining the diameter data of the left ventricular outflow channel along the parasternal left ventricular long axis from the target section image, and associating the diameter data with the target section image for display. By determining the section type of the cardiac ultrasound data, and when the section type is a parasternal left ventricular long-axis section, directly extracting the target section image for display from the cardiac ultrasound data, this application ensures effective subsequent measurement of the left ventricular outflow channel, obtaining data on the left ventricular outflow channel, and improving measurement accuracy.

This invention relates to the field of aerospace manufacturing technology, addressing the technical problems of limited measurement range, insufficient ability to capture details of complex curved surfaces, and susceptibility to environmental factors inherent in single measuring devices. Specifically, it relates to a method and apparatus for three-dimensional measurement of the overall shape of a large aircraft based on multi-component collaboration. The method includes acquiring and registering the shape contour point cloud to obtain local shape contour point clouds of the entire aircraft from different local perspectives; registering the local shape contour point clouds and constructing a sparse pose map; and registering the local shape contour point clouds acquired from different local perspectives based on the sparse pose map to generate a complete overall shape contour point cloud of the large aircraft. This invention can register high-precision local point cloud data of the aircraft acquired by the measuring device, automatically generating point cloud data for the surface of large aircraft, thereby achieving high-precision and high-efficiency measurement of large and complex shapes, and further improving the manufacturing and assembly quality of aircraft.

The present application belongs to the technical field of computer vision three-dimensional reconstruction, and particularly relates to a structured light shadow area recovery and reconstruction method based on kernel density estimation. The present application aims at the problem of shadow area generated by structured light when measuring objects with sharp height changes, and divides the measurement results into effective area and invalid area according to modulation intensity information; phase calculation and unwrapping are performed on the effective area, and for the invalid area, a kernel density estimation method is used to calculate a target vector set and construct a probability density function according to the phase information of the effective context pixels in the neighborhood, and the phase value of the shadow area is recovered by optimizing the objective function to minimize the context pixel phase prediction error and the local phase recovery error; the phase information is converted into three-dimensional coordinates in combination with the system calibration parameters, and three-dimensional topography measurement of the object is realized. The present application can effectively solve the problems of occlusion and shadow generated when measuring objects with large height difference, and improve the integrity of three-dimensional reconstruction.

A bedridden patient weight measurement device includes: a disengagement component comprising a base frame, wherein a plurality of guide struts evenly distributed along the bed direction are transversely traversed on one side of the base frame, the guide struts passing between the bed and the patient; and a plurality of support plates transversely traversed on the other side of the base frame, the support plates being detachably mounted on the lower surface of pairs of the guide struts; and a lifting component comprising a base, wherein the base frame is inserted into the base, and a drive component for driving the base frame to move up and down is fixedly mounted on the base; and a measuring component is disposed between the drive component and the base frame. This device not only allows for quick and effective measurement of the patient's weight but also effectively avoids patient swaying during the measurement process, greatly improving measurement safety and preventing accidental injury to the patient. Furthermore, the patient maintains a relatively stable position during the weighing process, thus effectively improving measurement comfort.

The present invention provides a measuring device for three-dimensional electric field distribution, which includes three groups of transmitting electrodes and a pair of test electrodes. The three groups of transmitting electrodes are respectively fixed on three mutually orthogonal planes. Each group of transmitting electrodes consists of two pairs of electrodes, and two sinusoidal alternating current signals in the kilohertz range with slightly different frequencies are introduced, forming a phase interference electric field in the three-dimensional space between the two pairs of electrodes. During measurement, the three groups of transmitting electrodes alternately output electrical signals in sequence, which is equivalent to rotating the transmitting electrodes. The test electrodes can move arbitrarily in space. When each group of transmitting electrodes works, the electric field intensity components of each point in space in the corresponding direction can be measured; after the three groups of transmitting electrodes work alternately, the electric field intensities in three directions can be measured. The feature of the present invention is that only a pair of test electrodes are used, and by using the equivalent rotation of the transmitting electrodes, the electric field intensities in three directions at each point in space can be obtained. This measuring device can be used to measure the electric field intensities in the three directions of the X, Y, and Z axes at each point of the phase interference electric field.

This invention provides an automatic air quality monitoring terminal based on BeiDou positioning, comprising a device housing, a sensor module, a data acquisition module, a data display module, and a BeiDou positioning module. The sensor module collects air quality data, and the data acquisition module is connected to the sensor module to acquire the data. The BeiDou positioning module acquires the location information of the monitoring terminal in real time. The data acquisition module fuses the air quality data with the corresponding location information and transmits it to the data display module for display. By integrating BeiDou positioning functionality, this invention can accurately obtain the geographical location information of the monitoring point. Simultaneously, by combining various air quality sensors, it enables effective measurement and analysis of air quality-related parameters. It can be widely applied in atmospheric environmental monitoring, urban air quality assessment, pollution source tracing, environmental science research, and related environmental protection decision-making, providing important data support and technical means for ensuring air quality and improving environmental conditions.

The present application belongs to the technical field of laser atmospheric remote sensing, and discloses a near-infrared rotational Raman polarization laser radar spectrometer and method. The received echo signals are divided into first and second echo signals, the first echo signals are filtered to obtain near-infrared rotational Raman signals with a first target wavelength, and the near-infrared rotational Raman signals with the first target wavelength are detected; the second echo signals are filtered, and the filtered near-infrared signals with a second target wavelength are divided into vertical and horizontal polarization signals; the vertical polarization signals are divided into vertical polarization high and low altitude signals, and the vertical polarization high and low altitude signals are detected respectively; and the horizontal polarization signals are divided into horizontal polarization high and low altitude signals, and the horizontal polarization high and low altitude signals are detected respectively. The present application can realize signal large dynamic range measurement and effective measurement of weak near-infrared band nitrogen-oxygen Raman scattering echo signals.