The system for measuring cargo dimensions is designed for streaming measurement of cargo dimensions, which can be luggage at airports and transshipment bases, various parcels, as well as commercial cargo. The authors of the article developed a structural and functional diagram of a control and measuring system for dynamic measurement of cargo dimensions, and also considered the principles of its operation.

Keywords: control and measuring system, measurements, cargo dimensions, luggage, automated systems

This article discusses one of the parts of the development of a device for testing samples of magnetostrictive materials. A study of various designs and an analysis of the sensitivity of the measuring system are presented. The substantiation of the use of a magnetic shunt to increase the sensitivity is given, which is confirmed in field experiments.

Keywords: magnetostrictive materials, basic magnetization curve, magnetic shunt, magnetic flux

The trend to miniaturize and reduce the material consumption of modern electrical products of alternating current, places increased demands on the quality of their individual elements. All electrical products of alternating current (electromagnets, electromagnetic relays, motors) have a moving and fixed parts of the magnetic circuit and at least one working coil. During the operation of electrical products of alternating current, a current flows in the working coil, a working magnetic flux is created in the fixed part of the magnetic circuit, which sets in motion its movable part. The magnitude of the magnetic flux is determined by the design, the mutual arrangement of the parts of the magnetic circuit and the working coil, as well as the number of turns in it and the magnitude of the flowing current. During the working cycle of electrical products of alternating current, the moving part of the magnetic circuit moves relatively stationary, which also leads to a change in the magnetic flux. It is required to know their mechanical, electrical and magnetic properties. Each group of indicators requires the use of its own methods and means of testing electrical products of alternating current. This situation stimulates the search for the integral characteristics of electrical products of alternating current, which allow to draw conclusions about the quality of individual parts and operational properties of the entire product. The article proposes to use the web-ampere characteristic of the operating cycle as an integral characteristic of an electromagnet. To obtain the weber - ampere characteristic of electrical products of alternating current, it is necessary to influence the magnetic circuit with an external varying magnetic field and measure the magnetic flux arising in its cross section with a special sensor. When determining the weber - ampere characteristic of the working cycle, the electrotechnical product of alternating current in assembled form is subjected to testing, which makes it impossible to use magnetic flux sensors. Therefore, the use of existing measurement methods is not possible and therefore it is necessary to develop a method for determining the weber - ampere characteristic of the operating cycle of AC electrical products, which has acceptable accuracy and does not require the use of additional sensors.

Keywords: electromagnets, integral characteristics, functional state assessment, magnetic measurements