9 results about "Volume measurements" patented technology

The invention discloses a blood vessel inner diameter correction method and device based on an X-ray total attenuation conservation principle and a storage medium, and belongs to the technical field of medical image processing. The core of the method is to discover and utilize the total net attenuation of a blood vessel filled with a contrast agent in an actual motion state and the total net attenuation of the blood vessel in an ideal static state to be kept in conservation. The method comprises the steps that an angiography image is acquired, and a target area and an initial inner diameter measuring line are determined; calculating the gray scale decline amount and the maximum value of each pixel of the line; on the basis of the conservation principle, the inner diameter of the blood vessel in an ideal state is inversely calculated through the formula that the inner diameter is corrected to be equal to sigma [(delta Ii / delta Imax) * Li]. Furthermore, based on the same principle, the method can be expanded and applied to correction of the two-dimensional contour of the target blood vessel. According to the method, errors caused by motion artifacts and resolution limitation are fundamentally compensated through a volume measurement method based on integration and distribution, and the method is particularly suitable for accurate measurement of severe stenosis blood vessels.

1. The name of the design product: the baffle of the volume measurement, code scanning and weighing all-in-one machine. 2. The use of the design product: the overall use: mainly used for volume measurement, weighing and code scanning of logistics packages; the local use: dust prevention. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. The bottom of the design product is not easy to see or not visible during use, and the design 1 top view is omitted; the bottom of the design product is not easy to see or not visible during use, and the design 2 top view is omitted. 6. Design 1 is designated as the basic design. 7. Other circumstances that need to be explained: this application is a partial design, the dashed line in the figure is not protected, and the solid line in the figure is protected.

Embodiments of the present invention relates to a vape / smoke detection device comprising at least one 3D scanning means for measuring a volume of a confined space; at least one particulate matter sensor for measuring floating particles in air; and a processor adapted for taking a first volume measurement of the confined space and a further volume measurement in a selected frequency of the confined space via the range imaging 3D scanning means, wherein if a volume measurement difference between the first volume measurement and any one of the further volume measurements exceeds a selected volume different threshold, measuring a distance between the particulate matter sensor and a position of occupied volume in the confined space causing the volume measurement difference via the 3D scanning means, taking particle measurement in the confined space, generating a vaping / smoking event signal if the particle measurement is inside a selected particle interval dependent on the distance.

This invention relates to the field of vacuum measurement technology. A method for calibrating a small volume of flow accumulation in a flowmeter is disclosed, comprising: online volume measurement of a standard volume chamber of the flowmeter, the flowmeter including a standard volume chamber, a vacuum flow guide orifice, an inflation module, and a molecular pump assembly, the vacuum flow guide orifice, the inflation module, and the molecular pump assembly being connected to the standard volume chamber respectively; the method comprising: responding to a test command, determining a target measurement mode, the target measurement mode including a first measurement mode and a second measurement mode; according to the target measurement mode, controlling the molecular pump assembly to evacuate the standard volume chamber, and then controlling the inflation module to inflate the standard volume chamber with gas, obtaining the inflation volume and inflation pressure difference; determining the volume of the standard volume chamber based on the inflation volume and inflation pressure difference. This application eliminates the need to load, unload, and send the standard volume chamber for testing, enabling on-site volume measurement of a standard volume susceptible to external factors.

The application discloses a kind of stockpile volume measurement method, device and mixing station, wherein the stockpile volume measurement method is applied to bunker, measuring equipment and moving mechanism are provided on the bunker, the measuring equipment is installed on the moving mechanism, the stockpile volume measurement method includes: obtaining the current coordinates of marker;Wherein the marker is set on the intersection vertical line emitted by the level installed on the moving mechanism for the first time calibration except any point on intersection point;Calculate the distance difference of last coordinate and the current coordinates of the marker;Wherein the last coordinate and the current coordinates are measured by the measuring equipment at different positions;And according to the distance difference and the point cloud coordinates of the stockpile surveyed by the measuring equipment, the volume of the stockpile is calculated.The application can reduce the cost of stockpile volume measurement.

The invention relates to the technical field of flow meters, and provides a flow measurement reference device and method, and the device comprises a supply module which is used for providing low-temperature fluid; the inlet end of the measuring pipeline is connected with the outlet of the supply module, and the measuring pipeline is connected with a flow meter; the mass weighing module is connected with the outlet end of the measuring pipeline through a first branch to form a mass measuring channel, and the mass weighing module is used for weighing the mass of the injected low-temperature fluid; the volume measurement module is connected with the outlet end of the measurement pipeline through a second branch to form a volume measurement channel, and the volume measurement module is used for measuring the volume of the injected low-temperature fluid; the mass measurement channel and the volume measurement channel can be switched and alternatively conducted. According to the arrangement, a mass method and a volume method are combined, the deviation of a single measurement method is reduced, and the accuracy and reliability of a measurement result are enhanced, so that accurate verification and calibration of the low-temperature flowmeter are realized, and the high-precision application requirement is met.