Denis S. Abramenko

Research and development of ultrasonic device prototype for intensification of drying process

In the article theory of ultrasonic drying is stated. The possibility of ultrasonic field creation with intensity about 150 dB by means of disk radiators in closed volume of drying chambers is considered. The prototype of ultrasonic dryer for carrying out experiments on various drying materials is described; results of preliminary experiments on drying of gelatin, peas, fabric and carrots are presented.

Method of acoustic load control

The problems of indirect determination of parameters, which are directly connected with the value and the character of acoustic resistance of the media exposed to ultrasound, are discussed. This method for control of acoustic media parameters is based on control of electric parameters of ultrasonic vibrating systems, which are in contact with the processed technological media.

Automation of the amplitude measurement process of ultrasonic oscillatory systems irradiating surface

In the article presented results of researches directional on perfecting a stroboscopic measuring method of oscillations amplitude. The obtained results have allowed to create the equipment of automatic amplitude checking and to recommend it for practical application.

Usage features of contact and noncontact measuring methods of oscillation amplitude during adjustment process of ultrasonic devices

The information on possibilities and specificities of usage of a noncontact stroboscopic measuring method of amplitude is presented in the article. Results of the stroboscopic method comparison with measuring by means of a hour-type displacement measurer are presented. The carried out analysis allows determining advantages and disadvantages of examined measuring methods.

Automated line for ultrasonic spraying of anticoagulant into the blood collection tubes

Results of the work on creation of an automated line of ultrasonic spraying of anticoagulant on inner surface of blood collection tubes are presented in the article. Designed line provides automatic feeding of the tubes, moving them to the zone of spraying and uniformity of spraying, drying. Productivity of the automated line is 1500 products/hour.

Increase in efficiency of operation of ultrasonic processing devices (based on welding of thin sheets)

The article is devoted to the voltage regulators used for design of ultrasonic processing devices. The schemes of thyristor and chopper voltage regulators are discussed. Their advantages and disadvantages of these circuits are identified. The results of application of different circuits and control laws are analyzed.

Practical investigations of the method for indirect control of acoustic load parameters

Article is devoted to testing of the method for indirect control of acoustic load parameters. The results of measurement of acoustic load parameters are presented.

The features investigation of piezoelectric transducers

This article is devoted to comparative researches of half-wave ultrasonic piezoelectric transducers which are made on various constructive schemas. Measuring results of amplitude-frequency and phase-frequency characteristics with operating tools of one-wave and half-wave length are used for their comparison. All operating tools are used in the ultrasonic therapeutic devices.

Monitoring of Ultrasonic Generators Parameters for Definition of Optimal Modes of Ultrasonic Influence on Different Medium

This article is devoted to making and usage of a specialized measuring complex for speed up of adjustment and diagnostic process of ultrasonic generators. The results of usage of a complex on specific targets are presented.

Automating of process of ultrasonic welding of thermoplastic materials

The article discusses conception of automation of process of ultrasonic welding.