CN-122017212-A - Method, system, equipment and medium for detecting moisture resistance of gypsum board

CN122017212ACN 122017212 ACN122017212 ACN 122017212ACN-122017212-A

Abstract

The application discloses a method, a system, equipment and a medium for detecting the moisture resistance of a gypsum board, which relate to the technical field of machine vision identification and comprise the following steps of selecting a plurality of gypsum board samples with the same specification, controlling the center surfaces of the gypsum board samples to drop water drops with different volumes respectively, continuously acquiring a plurality of first surface images of the gypsum board samples dropping the water drops with the first preset volume at different moments, acquiring the final water absorption rate and the water absorption rate of the gypsum board samples according to the first surface images, continuously acquiring a plurality of second surface images of the gypsum board samples dropping the water drops with the second preset volume at different moments, acquiring the moisture volatilization capacity index of the gypsum board samples according to the second surface images and the environment parameters, and acquiring the moisture resistance index of the gypsum board samples according to the final water absorption rate, the water absorption rate and the moisture volatilization capacity index.

Inventors

LI TAO
HE CHENG
Xie Yuankai

Assignees

泰山石膏(宜宾)有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. A method for testing the moisture resistance of a gypsum board, comprising the steps of: Selecting a plurality of gypsum board samples with the same specification, and controlling the center surfaces of the gypsum board samples to be respectively dripped with water drops with a first preset volume and a second preset volume, wherein the water drops with the first preset volume cannot be fully immersed in the gypsum board samples, the water drops with the second preset volume can be fully immersed in the gypsum board samples, and the first preset volume is larger than the second preset volume; Continuously acquiring a plurality of first surface images of a gypsum board sample dropping into water drops with a first preset volume from a first moment to a second moment, wherein the first moment is the moment when the water drops just drop into the central surface of the gypsum board sample, and the second moment is the moment when the residual water drop volume of partial water drops after being immersed into the gypsum board sample has no obvious change; obtaining the final water absorption of the gypsum board sample according to the first surface image; Acquiring the water absorption rate of the gypsum board sample according to the first surface image; continuously acquiring a plurality of second surface images of the gypsum board sample dropping water drops with a second preset volume from a third moment to a fourth moment, wherein the third moment is the moment when the water drops drop into the gypsum board sample and are completely diffused, and the fourth moment is the moment when the water in the gypsum board sample is completely volatilized; acquiring a water volatilization capacity index of the gypsum board sample according to the second surface image and the environmental parameter; and obtaining the moisture resistance index of the gypsum board sample according to the final water absorption, the water absorption rate and the water volatilization capacity index.
2. A method of testing the moisture resistance of a gypsum board as set forth in claim 1, wherein obtaining a final water absorption of a gypsum board sample from the first surface image comprises: obtaining a residual water drop volume V2 on the gypsum board sample according to the first surface image at the second moment; and obtaining the final water absorption W of the gypsum board sample according to the residual water drop volume V2, wherein W= (V1-V2)/V1, and V1 is a first preset volume.
3. A method of testing the moisture resistance of gypsum board as set forth in claim 2, wherein obtaining the residual water drop volume V2 on the gypsum board sample from the first surface image at the second time comprises: Acquiring the outline radius r of the water drop, the average thickness h of the water drop and the contact angle theta of the water drop and the surface of the gypsum board sample according to the first surface image at the second moment; inputting the outline radius r, the average thickness h and the contact angle theta of the water drop into a preset water drop volume calculation model to obtain the residual water drop volume V2, wherein the expression of the water drop volume calculation model is as follows: V2=πr 2 h(1+0.01θ)。
4. A method of testing the moisture resistance of a gypsum board as set forth in claim 3, wherein obtaining the water absorption rate of the gypsum board sample from the first surface image comprises: Respectively selecting first surface images corresponding to preset time t1 at each interval from a first moment from a plurality of first surface images; Based on a water drop volume calculation model, respectively acquiring the residual water drop volume V2 corresponding to the selected first surface image to acquire a sub-water absorption rate Q 'corresponding to each preset time t at intervals, wherein Q' = (V1-V2)/t 1; The average of the plurality of sub-water absorption rates Q' is output as the water absorption rate Q of the gypsum board sample.
5. The method of claim 1, wherein obtaining a moisture evaporation capacity index of the gypsum board sample based on the second surface image and the environmental parameter comprises: respectively selecting second surface images corresponding to preset time t2 at intervals from a third moment from the plurality of second surface images; acquiring the water stain shadow area variation delta S of the surface of the gypsum board sample in the two selected second surface images at adjacent moments, and acquiring the environment temperature T and the environment wind speed v corresponding to preset time T2 at each interval; inputting the water stain shadow area variable quantity delta S, the ambient temperature T and the ambient wind speed v at different moments into a preset volatilization capability calculation model to obtain a plurality of sub-moisture volatilization capability indexes R'; The average value of the plurality of sub-moisture volatility indices R' is output as the moisture volatility index R of the gypsum board sample.
6. The method for testing the moisture resistance of a gypsum board of claim 5, wherein the expression of the volatility calculation model is: R'=K·(T·v/d)·(ΔS/t2); where K is the correction factor and d is the thickness of the gypsum board sample.
7. A method of testing the moisture resistance of gypsum board according to any one of claims 1-6, wherein obtaining a moisture resistance index of a gypsum board sample based on the final water absorption, water absorption rate, and moisture evaporation capacity index comprises: Respectively carrying out normalization treatment on the final water absorption rate, the water absorption rate and the water volatilization capacity index to a section of [0,1] so as to respectively obtain a first normalization value Z1 corresponding to the final water absorption rate, a second normalization value Z2 corresponding to the water absorption rate and a third normalization value Z3 corresponding to the water volatilization capacity index; And obtaining a moisture resistance index M of the gypsum board sample according to the first normalization value Z1, the second normalization value Z2 and the third normalization value Z3, wherein M=aZ1+βZ2+γZ3, alpha is a first weight coefficient, beta is a second weight coefficient, gamma is a third weight coefficient, and alpha > beta, alpha > gamma.
8. A gypsum board moisture resistance detection system, comprising: The system comprises a water dripping control module, a first water dripping control module and a second water dripping control module, wherein the water dripping control module is used for selecting a plurality of gypsum board samples with the same specification, and controlling the water dripping control module to respectively drip water drops with a first preset volume and a second preset volume on the central surfaces of different gypsum board samples, wherein the water drops with the first preset volume cannot be totally immersed in the gypsum board samples, the water drops with the second preset volume can be totally immersed in the gypsum board samples, and the first preset volume is larger than the second preset volume; The first image acquisition module is used for continuously acquiring a plurality of first surface images of the gypsum board sample dripped with the first preset volume of water drops from a first moment to a second moment, wherein the first moment is the moment when the water drops just drip into the central surface of the gypsum board sample, and the second moment is the moment when the residual water drop volume of part of the water drops after the water drops are immersed into the gypsum board sample has no obvious change; the first parameter acquisition module is used for acquiring the final water absorption of the gypsum board sample according to the first surface image; The second parameter acquisition module is used for acquiring the water absorption rate of the gypsum board sample according to the first surface image; The second image acquisition module is used for continuously acquiring a plurality of second surface images of the gypsum board sample dripped with the second preset volume of water drops from a third moment to a fourth moment, wherein the third moment is the moment when the water drops are dripped into the gypsum board sample and are completely diffused, and the fourth moment is the moment when the water in the gypsum board sample is completely volatilized; The third parameter acquisition module is used for acquiring the moisture volatilization capacity index of the gypsum board sample according to the second surface image and the environmental parameter; And the moisture resistance evaluation module is used for obtaining the moisture resistance index of the gypsum board sample according to the final water absorption rate, the water absorption rate and the moisture volatilization capacity index.
9. A computer device, characterized in that it comprises a memory in which a computer program is stored and a processor which executes the computer program, implementing the method according to any of claims 1-7.
10. A computer readable storage medium, having stored thereon a computer program, the computer program being executable by a processor to implement the method of any of claims 1-7.

Description

Method, system, equipment and medium for detecting moisture resistance of gypsum board Technical Field The application relates to the technical field of machine vision identification, in particular to a method, a system, equipment and a medium for detecting the moisture resistance of a gypsum board. Background As a common building decoration material, the gypsum board has the moisture resistance directly influencing the use effect and the service life, especially in the humid environment such as kitchen, bathroom, basement, etc., the gypsum board with poor moisture resistance is easy to soften, deform, mold, etc., and seriously influences the safety and the aesthetic degree of the building structure. Therefore, the accurate and efficient detection of the moisture resistance of the gypsum board is a key link in the production and application processes of the gypsum board. At present, the existing gypsum board moisture resistance detection method mostly adopts a soaking method, namely, after a gypsum board sample is completely soaked in water for a certain time, the water absorption rate of the gypsum board sample is calculated by a weighing mode to evaluate the moisture resistance, and the method has the obvious defects that firstly, the detection period is long, the whole process takes time from sample drying and soaking to weighing, the requirement of quick quality inspection on a production line cannot be met, secondly, the detection index is single, the moisture resistance is reflected only by the water absorption rate, the key moisture resistance indexes such as the instantaneous water absorption characteristic, the water volatilization capacity and the like of the gypsum board when the gypsum board is contacted with a small amount of water cannot be comprehensively reflected, thirdly, the detection precision is low, the quality change before and after the manual measurement is easy to produce errors, and the dynamic change process of water drops on the surface of the gypsum board cannot be captured. With the development of machine vision technology, the application of the method in the field of material performance detection is increasingly wide, but at present, a scheme for combining the machine vision identification technology with multi-index detection of the moisture resistance of the gypsum board is not available, and quick, accurate and multi-dimensional detection of the moisture resistance of the gypsum board cannot be realized. Accordingly, there is a need for a method of testing the moisture resistance of gypsum board that addresses the above-described problems. Disclosure of Invention The application mainly aims to provide a method, a system, equipment and a medium for detecting the moisture resistance of a gypsum board, and aims to solve the technical problem that the existing method for detecting the moisture resistance of the gypsum board is low in detection efficiency and precision. In order to achieve the above object, the present application provides a method for detecting moisture resistance of gypsum board, comprising the steps of: Selecting a plurality of gypsum board samples with the same specification, and controlling the center surfaces of the gypsum board samples to be respectively dripped with water drops with a first preset volume and a second preset volume, wherein the water drops with the first preset volume cannot be fully immersed in the gypsum board samples, the water drops with the second preset volume can be fully immersed in the gypsum board samples, and the first preset volume is larger than the second preset volume; Continuously acquiring a plurality of first surface images of a gypsum board sample dropping into water drops with a first preset volume from a first moment to a second moment, wherein the first moment is the moment when the water drops just drop into the central surface of the gypsum board sample, and the second moment is the moment when the residual water drop volume of partial water drops after being immersed into the gypsum board sample has no obvious change; obtaining the final water absorption of the gypsum board sample according to the first surface image; Acquiring the water absorption rate of the gypsum board sample according to the first surface image; continuously acquiring a plurality of second surface images of the gypsum board sample dropping water drops with a second preset volume from a third moment to a fourth moment, wherein the third moment is the moment when the water drops drop into the gypsum board sample and are completely diffused, and the fourth moment is the moment when the water in the gypsum board sample is completely volatilized; acquiring a water volatilization capacity index of the gypsum board sample according to the second surface image and the environmental parameter; and obtaining the moisture resistance index of the gypsum board sample according to the final water absorption, the water absorption rate and the water volat