Method for automated non-destructive control of materials and products

FIELD: flaw detection technologies, non-destructive control methods.

SUBSTANCE: method for controlling products by means of luminescent magneto-powder or capillary flaw detection includes observing images of defects in products produced during flaw detection and following analysis of these images. In accordance to method, product surface being controlled is irradiated firstly with light, causing luminescence of agent used during magneto-powder or capillary flaw detection, and light, not causing luminescence of aforementioned agent. To detect flaws, comparison of produced images is performed using computing device. Received images are recorded by means of at least one video camera. As computing device, computer connected to video camera is used.

EFFECT: expanded arsenal of technical means, used for flaw detection, creation of method for non-destructive control of products of any configuration, providing for automatic finding and analysis of defects in products.

3 cl

 

The invention relates to methods of non-destructive testing of objects using luminescent agents, namely, magnetic particle and liquid penetrant inspection, and can be used for detection of defects of any form of surfaces of various articles in all areas of technology.

The known method of capillary surface quality control of materials and products, the implementation of which is prepared to control the surface put penetrant, maintain, delete, cleaner, and then, on the surface cause the developer, dried and inspected for the detection and registration of indicator marks, they will judge the presence of defects (HELL 5.9537-80 "non-destructive testing. Semi-finished products and metal structures. Capillary methods and tools for quality control of surface; RF patent №2033605, IPC G 01 N 21/91, publishing, 1995).

The disadvantage of this method is the impossibility of obtaining the indicator tracks, separately and simultaneously characterize the surface and through the defects.

When magnetic particle inspection of products in places of abrupt changes in cross section of controlled items (thread, the tops of the gear teeth and other geometrical heterogeneity of the object of control) possible false subsidence of the magnetic powder, which complicates the use of the method. For the Holocene accurate result, you must use visual control, what affects the accuracy and objectivity of the result.

There are various ways of automated control for the detection of discontinuities in the object control in magnetic particle testing (V.g.gerasimov and other, "non-Destructive testing", M, 1992, str-112).

In the known methods of control via automation of all operations except operation of the inspection of the test object, thus to select the optimal conditions necessary to use various additional operations in process control (change quantity of the powder in suspension, multiple magnetization of controlled objects, changing modes of magnetization and others).

The known method of fluorescent inspection of pipe ends, in which the part is subjected to application of the pipe end, irrigate suspension in the zone of magnetization and illuminate the area of control after his watering suspension ultraviolet irradiator, in this examination of the test object is performed using a video camera with an optical filter (RF patent No. 34017 for a utility model, IPC G 01 N 27/84, publishing, 2003).

The known method also does not allow for automatic retrieval and identification of defects in a controlled products.

The present invention is the extension of the technical tools used in testing and the creation of the method of non-destructive testing of objects of any configuration, providing automatic search and analysis of defects in the products.

The invention consists in the following.

The method of control of materials and products by fluorescent magnetic particle or liquid penetrant inspection includes observation obtained by radiography images of defects in products and their subsequent analysis, with controlled surface alternately irradiated with the light, causing luminescence used in magnetic particle or liquid penetrant inspection agent, and light, not causing luminescence of said agent. After each exposure record received image, and to detect defects produce the comparison of the obtained images by the computing device.

Recording the received image is realized by means of at least one video camera.

As computing devices use connected to the camcorder to the computer.

Automatic search of a defect in the test object based on the calculation of gradients of the contrast of the obtained image (i.e. the definition of sharp changes in the intensity of the signal) and then determining which of the detected gradients can be attributed to the defect and what is the form element object, because the gradients to which Strastnoi will occur at the boundary surface of the object, but also formed on the surface of the sharp change in cross-section (such as cutting), and using existing cracks.

The proposed method is carried out in the following sequence.

After magnetization of the investigated object on its surface is formed flat figure. Controlled surface alternately irradiated with the light, causing luminescence used in magnetic particle or liquid penetrant inspection agent used in magnetic particle or liquid penetrant inspection agent and light, not causing luminescence, and observation of the obtained images is performed after each exposure movably installed a video camera in the field of view which is consistently the entire surface of the product.

Upon irradiation of the control light, causing luminescence used in magnetic particle or liquid penetrant inspection agent, the camera captures all of the received image, i.e. image defects and image formed object elements with differences section. Upon irradiation of the control light, not causing luminescence, the camcorder records only the image formed in the element having the differential cross section.

The video signals processed by the processor installed PR the program automatically search for defects. The essence of the program is the calculation of the gradients of the brightness of the image and building a topographically closed regions. When comparing the images of the test surface video preset program automatically determines which of the detected gradient contrast refers to the defect of the inspection object, and which refers to the form of execution control object.

The processor processes all the information and controls all elements of the unit.

The proposed method allows to automatically determine the presence of defects in the products.

1. The method of control products by fluorescent magnetic particle or liquid penetrant inspection, including the observation obtained by radiography images of defects in products and their subsequent analysis, wherein the controlled surface is irradiated alternately light, causing luminescence used in magnetic particle or liquid penetrant inspection agent, and light, not causing luminescence of said agent, after each exposure record received image, and to detect defects produce the comparison of the obtained images by the computing device.

2. The method according to claim 1, characterized in that the fixing of the images received by the pic what edstam, at least one video camera.

3. The method according to any one of claims 1 and 2, characterized in that as computing devices are connected to the camcorder to the computer.



 

Same patents:

FIELD: capillary defectoscopy; compositions of the color penetrants.

SUBSTANCE: the invention is pertaining to the color capillary defectoscopy, in particular, to the compositions of the color penetrants applied to the color control over the items of the high-duty. The penetrant contains the mixture of the following composition: xanthene dyes of the yellow-orange fluoresceine and red-dark blue rhodamine of 3-6 %, the surfactant of 10-40 %, the rest - the dissolvent. The ratio of the mixture of the yellow-orange and the dark blue - red dyes compounds 1:2, as the surfactant use neonol or syntanol. The technical result of the invention is creation of the color penetrant of the lowered volatility, the reduced flammability, the extra-high sensitivity ensuring detection of the minimal flaw with the opening width of 0.5-1 microns and the improved reliability and stability of the monitoring of the items in conditions of repairs and operation.

EFFECT: the invention ensures detection of the minimal flaw with the opening width of about 1 micron, improved reliability and stability of the monitoring of the items in conditions of repairs and operation.

1 tbl

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SUBSTANCE: method comprises processing the surface with a water-soluble penetrating agent, applying developer, recording defects, and washing the surface with water. Each of the washings is carried out in two baths arranged in series, with fresh water being supplied to the second bath in amount that is determined by the permissible concentration of contaminant and overflowing the water from the second bath to the first one in the direction opposite to the movement of the article.

EFFECT: improved method and reduced cost of control.

1 dwg

FIELD: nondestructive inspection.

SUBSTANCE: color chemical reaction between penetrant and developer is used for defect indication. Penetrant has surface-active substance (SAS), ethyl alcohol, water, boric acid. Developer has glycerin, kaolin, SAS, ethyl alcohol, bromine-thymol blue indicator and PH regulator for achieving initial blue-green color.

EFFECT: improved reliability.

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SUBSTANCE: penetrating agent used for detecting on oleophilic surface flaws with opening until l0.5 micrometers contains "main crimson" dyeing agent of fireproofing compounds with quinoid group and in addition it contains fatty acid and benzyl benzoate. Said ingredients are taken in relation (mass %): dyeing agent, 3.0 - 5.0; non-ionogenic surface active matter, 0.5 -1.0; fatty acid, 10.0 - 15.0; benzyl benzoate, 5.0 -10.0; hydrocarbon base - up to 100.

EFFECT: enhance accuracy and responsibility of measurements.

3 cl, 2 tbl

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SUBSTANCE: for the purpose to detect defects at opening about 1 mcm at coarse surface a penetrating agent contains "the main raspberry" dyestuff of antipyrinic group with quinoid group and non-ionogenic SAS and it, additionally, contains acidic supplement , moreover, these ingredients should be taken at the following ratio (weight%): the main raspberry dyestuff 3.0-5.0, non-ionogenic SAS 0.5-1.0, acid - at the quantity from low acidic to approximately neutral pH, water - the rest.

EFFECT: higher sensitivity.

3 cl, 2 tbl

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FIELD: measurement technology.

SUBSTANCE: device can be used for testing radionuclear materials and has pulse laser source, aids for focusing light from the source onto object to be subject to testing to get plasma onto surface of object, aid for testing plasma radiation spectrum, aid for determining element composition of object and aid for shifting object.

EFFECT: improved resolution.

10 cl, 2 dwg

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The invention relates to analytical chemistry
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FIELD: measurement technology.

SUBSTANCE: device can be used for testing radionuclear materials and has pulse laser source, aids for focusing light from the source onto object to be subject to testing to get plasma onto surface of object, aid for testing plasma radiation spectrum, aid for determining element composition of object and aid for shifting object.

EFFECT: improved resolution.

10 cl, 2 dwg

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