Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Automatic control system of high-frequency heat sealing for irregular-shaped plastic. Trofimov N.V., Yulenets Yu.P., Markov A.V. The article suggests the automatic control system of high-frequency heat sealing for irregular-shaped plastic having internal and external heat seals. The system is based on microcontroller and operating under automatic control mode for heat sealing specific power simultaneously in two joints by the variation law of specific power at the first joint. As a control device the system uses reactance tube connected in series to the second working condenser. The tube changes condenser’s own capacitance under the action of voltage shift variation at the controlling grid. Key words: high-frequency plastic heat sealing, irregular-shaped plastic items, automatic control system, specific power control, control device, reactance tube. Контактный телефон (812) 316-47-14. E-mail: markov-av@yandex.ru