Master's dissertation on the topic "Automated control system of heat supply parameters": p. 75, Fig. 29, table. 24, sources 26.
Accuracy. The master's dissertation considers the automated control system of heat supply parameters for the general case and in particular for a multi-storey building, investigates system components, their principle of operation and interaction with algorithmic methods, methods of implementation and construction of automated control systems.
Relevance
Today, sheet metal products are widely used in many industries. Rolled sheets are rectangular metal sheets of different thickness, width and length. It also includes sheet rolled steel. Sheet metal in contrast to varietal is often obtained by cold rolling. Cold-rolled sheet metal has a more uniform thickness and high surface cleanliness compared to high-quality rolled products. Failure to ensure the required quality can lead to the destruction of such objects, so to control them for defects is an urgent task today. In the master's dissertation such a problem is solved by developing an ultrasonic automated control system for sheet metal.
The master's dissertation consists of 4 sections, 75 pages, contains 18 illustrations, 29 tables, was processed 28 sources.
Relevance of the topic: The main task of the development of ultrasonic flaw detection is to increase its spatial resolution, which depends on a number of characteristics of the flaw detector and the wavelength used to control oscillations. This problem can be solved in two ways: the use of ultrasonic oscillations of higher frequencies (decrease in wavelength) and the use of focusing oscillations, which leads to an increase in resolution due to the increase in acoustic pressure in the focal zone.
The purpose of the study: the development of an ultrasonic automatic high-resolution control system. On the basis of the literature review the analysis of modern systems of ultrasonic control, their application and the principle of action is carried out. The problem of low resolution in solid materials is revealed.
Actuality of theme
Today, wireless data technology has become an integral part of our lives. They are widely used among consumers of both conventional and professional equipment. Non-destructive testing is no exception. If we consider the existing devices and systems of non-destructive testing in which wireless data transmission is used, we will see that in the vast majority of them such technologies are used as auxiliary, and are not used for transmission of raw data about the object of control. In this work, wireless technologies are used not just to transmit reports on the state of the object of control, but with their help organized "communication" of the sensor with the primary converter and the receiving unit and information processing. In operation, such a unit is a smartphone. The smartphone as a complex device today has high computing power, a full set of the most common wireless technologies, as well as a flexible software shell. It is these advantages of this type of device allows you to use them in non-destructive testing. The essence of this work is to improve, namely the introduction of menus in English and automatic selection of maxima when determining the distance between the reference and echo pulses, the development of a flaw detector with a wireless channel for transmitting data on the status of the object to the smartphone. Where this data will be processed and displayed on the main display to decide whether there are defects in the inspected object.
The master's dissertation consists of an introduction, 6 chapters, conclusions and a list of references. The introduction substantiates the relevance and practical value of the chosen topic, sets the goal and objectives of the study. The first section provides an overview of the structure and disease of the eye; devices and systems for the diagnosis of eye diseases. In the second section the acoustic and electroacoustic paths were calculated, the nodes of the circuits of the electrical principle were calculated, the structural and functional schemes were developed. The third section simulates a bandpass filter. In the fourth section, the PCB was modeled and a piezoelectric transducer was developed in SolidWorks. In the fifth section, the probability of diagnosis was calculated. In the sixth chapter, a startup project for the topic of the dissertation was developed. The conclusions summarize the study and the list of references, the sources on the basis of which the study was conducted.
