1. Acoustic emission monitoring method
2. Visual measurement monitoring method
3. Ultrasonic monitoring method
4. Capillar method of control (dye penetrant testing)
Acoustic emission measuring complex
Lel/A-Line 32D (DDM)
Compact portable AE system in industrial computer designed for the measuring in field conditions. Method of acoustic emission allows to receive a vast array of information, regulate and extend the operating cycle of critical industrial facilities operatively and at minimal cost, aids in forecasting of appearance of emergency destructions and disasters probability.
Objective of acoustic emission monitoring is to detect, determine coordinates and track the sources of AE signals of monitored objects, such as tank and pressure vessels, oil storages, pipelines, bridges, chemical reactors and other engineering constructions
Characteristic features of EA method, defining its abilities and sphere of applications are:
AE method ensures the detection and registration of just developing defects. This means that in spite of the size of defect the most dangerous defects, prone to develop or developing are revealed.
AE method allows to clasify defects not by its sizes but by the extent of danger. Herewith some defects, which exceed the defective rate using the traditional approaches of NI can be classified as non-dangerous, not requiring repair of construction elements. Furthermore product can fail not only due to the increase in lack of adhension, but also due to the deformation, buckling and other reasons. In these cases AE method signals about the deveploment of undesired processes.
AE method possesses the high sensitivity to the growing defects, allows to detect the increment in
cracks to the extent of milimiter fractions, in working conditions. Limiting sensitivity of AE equipment
according to theoretical assessment is about 1*10-6 mm2, which corresponds to the detection of
crack with size of 1 micron to 1 micron appearance
AE method refers to integral methods of NI, integrality lies in the fact that usage of one or more
transformers of AE fixedly installed on the surface of object, ensures the control of the entire object as a whole. Herewith the coordinates of defects are defined without scanning of the object surface by transformer. Therefore the conduction of control and its result are independent from object surface condition and the quality of its processing. This ensures the conduction of control in case if the access to the surface of the monitored object is difficult or impossible, for example, for insulated pipelines and vessels, objects located underground, contructions working in difficult complicated conditions;
AE method allows to conduct the monitoring of different technological proccesses and proccesses of properties and conditions changes of materials;
AE method is not critical to the defect orientation, in contrast to traditional methods, for which these parameters are one of the most crucial factors, affecting the results of monitoring;
AE method has less limitation associated with the properties and structure of materials. Inhomogeneity of materials does not have essential value, that is why AE method has wider range of usage to materials
Visual measurement monitoring method.
Designed for visual measurement monitoring method of main metal (semi-finished goods, blanks, products), welded joints and surfacing, preparation of parts for wielding.