Device and method for automatically measuring and interpreting pressure of plastic pressure-measurement sensitive element

Abstract

The invention relates to a device and a method for automatically measuring and interpreting pressure of a plastic pressure-measurement sensitive element. The device comprises an upper computer, a precise measurement mechanism, a symmetrical measurement subsystem and a pressure measurement subsystem. A charge coupled device (CCD) image sensor collects image information of a sensitive element and transmits the image information to the upper computer through cooperation of the precise measurement mechanism. Displacement information is measured through a pattern displacement sensor and transmitted to the upper computer after being processed through a height collection lower computer, and the upper computer processes and calculates all information and gives an interpretation result. The device can conduct multi-point and multi-time measurement on height of the sensitive element after pressing the sensitive element and automatically judges whether pressure measurement value of the sensitive element is effective, manual involvement is not required, measurement points are set automatically, measured pressure is calculated automatically in iteration mode by connecting a sensitive element data base corresponding to specifications and batches, and the interpretation result is directly displayed through the upper computer. The device and the method for automatically measuring and interpreting the pressure of the plastic pressure-measurement sensitive element is fast and convenient, high in automation, precise in measurement results and judging and high in working efficiency.

Description

technical field [0001] The invention belongs to the technical field of pressure measurement, and mainly relates to a method for automatically measuring pressure by using a plastic pressure-measuring sensitive element, in particular to a plastic pressure-measuring sensitive element automatic measuring pressure interpretation device and method. It is mainly used for pressure measurement of high-pressure gas and selection of manometers. Background technique [0002] The pressure of airtight and semi-airtight containers is one of the technical indicators that must be measured in design, development, production, and acceptance. Because the plastic pressure measurement method has the characteristics of easy use, simple operation, and no need to destroy the tested object, it is the pressure measurement method in industrial production. primary means of measurement. The plastic pressure measurement method measures the measured pressure through the deformation of the plastic pressure...

AI Technical Summary

Problems solved by technology

[0003] 1) The position of the measuring point is single. Because the sensitive element is under pressure, the two stressed end faces are not ideal planes. Therefore, it is unscientific to measure the post-pressure height or deformation at a single point;

[0004] 2) Under the action of high pressure, the deformation of the sensitive element is a large plastic deformation, and the stress state of the two ends is very complicated. There are certain requirements for the assembly of the load cell, and the phenomenon of pressure deviation of the sensitive element often occurs. The post-pressure height or deformation of the sensitive element cannot reflect the measured pressure. Whether the pressure deviation of the sensitive element is judged by human eyes, there are measurement errors caused by human factors

[0005] 3) Since there are many models, specifications, and batch numbers of plastic sensitive components commonly used at present, after the pressure height or deformation is measured, the measured pressure is often judged by manual table inspection. The tester may also need to check the table when checking the table. Linear interpolation, a lot of practice shows that the work is cumbersome, error-prone, and inefficient

[0006] The accuracy of vernier calipers with a resolution of 0.02mm is poor when testing the height of copper pillars in China; the accuracy of spiral micrometers with a resolution of 0.001mm can be guaranteed, but there is a problem with the selection of measuring points when measuring copper pillars with larger diameters. As a result, measurement errors caused by human factors are caused; the imported foreign automatic altimeter is used, because its function is not designed for plastic sensitive components, the same problem of measuring point position and voltage deviation

In the master's thesis of Nanjing University of Science and Technology [Plastic pressure measuring device pressure intelligent interpretation system Ji Weirong], an automatic detection system based on inductive sensor sensitive components has been developed. This system has not been used in practice, and it cannot automatically measure the height of sensitive components at different points. And judge the voltage bias of the sensitive element or not

[0007] Through the literature search within a certain range by the applicant of the present invention, no closer relevant information was found

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