Device and method for measuring size and porosity of object and vacuum air sealing method

Abstract

The invention discloses a device for measuring the size of an object. The device comprises a first measuring container, a second measuring container and a sealing air bag; the first measuring container comprises a first box and a first cover, and a first air outlet used for being connected with a vacuum pump and a first air inlet used for releasing air into the first box are formed in the first box; the second measuring container is used for being arranged in the first measuring container and comprises a second box and a second cover, a first air through hole is formed in the second box, the first air through hole is connected with the vacuum pump and a flowmeter through a t-branch pipe separately, when the first air through hole is communicated with the vacuum pump, a vacuum in the container is achieved, the first air through hole is used for releasing air into the second measuring container when being communicated with the flowmeter, and a pressure sensor is connected to the t-branchpipe and used for measuring the air pressure in the container; the sealing air bag is used for sealing the object to be measured. The invention further discloses a method for measuring the size and the porosity of the object and a vacuum air sealing method. The device has the advantages that the structure is simple, the cost is low, measurement is accurate and reliable, the device is suitable formeasuring objects in various shapes, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of measuring object volume, in particular to a device and method for measuring object volume and porosity and a vacuum gas sealing method. Background technique [0002] Many fields such as industry, agriculture, and scientific experiments need to measure the porosity of objects. The pores of objects are usually irregular in shape and different in size, especially for porous objects. If you use a gauge to measure the size and depth of each pore one by one, it will Time-consuming and labor-intensive. And in many cases, the pores of the object will extend from the surface to the interior, and its internal extension, regardless of shape and size, is often not related to the surface pores, and cannot be measured or estimated from the surface. [0003] At present, the measurement of the porosity of an object is often carried out by using the Archimedes principle, using three-dimensional laser scanning technology, ...

AI Technical Summary

Problems solved by technology

When it comes to volume measurement, the data processing capacity of 3D laser scanning is large, and it needs to be equipped with a large memory and high-speed CPU computer, which takes a long time for scanning and data processing.

In many cases, users only need to know the volume of the object, but 3D laser scanning needs to scan the object point by point to establish a 3D digital model of the object, and then get the volume, which is not only time-consuming but also a waste of resources

Three-dimensional laser scanning has relatively high requirements on the surface of the object to be measured. If the surface of the object is too dark, too bright, or too rough, it will hinder laser reading and affect the measurement accuracy.

X-ray tomography technology can accurately measure the porosity of the surface and interior of the object, but the instrument is expensive, the measurement takes a long time, and there is a radiation dose, which may have adverse effects on the measured object or the user

[0006] This shows that the above-mentioned existing device and method for measuring object volume and porosity obviously still have inconvenience and defects in structure, method and use, and need to be further improved urgently

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