Automatic control system for Kyropoulos-process sapphire crystal growth

Abstract

The invention relates to the field of automatic control in industrial production, particularly an automatic control system for Kyropoulos-process sapphire crystal growth. The invention is characterized in that the automatic control system mainly comprises a microprocessor, a touch screen, an audible and visual alarm circuit, a control cabinet, an upper computer, a vacuum meter, a heating power source, a rotary variable-frequency motor, an elevating variable-frequency motor, a weighing sensor and an elevating stepping motor, wherein the microprocessor is the core unit of the whole automatic control system, implements communication and control with the control cabinet, upper computer, vacuum meter, heating power source, rotary variable-frequency motor and elevating variable-frequency motor through an RS-485 bus, implements communication with the touch screen and weighing sensor through an RS-232 bus, and controls the operation of the elevating stepping motor and audible and visual alarm circuit through an I / O port. The multi-physical-quantity detection and control system in the Kyropoulos-process sapphire crystal growth process is designed on the basis of the embedded microprocessor, implements automatic control on the whole crystal growth process, lowers the dependence on the artificial intervention and technology capability of operating personnel in the crystal growth process, reduces the labor amount of the operating personnel, and enhances the standardability and crystal quality of the crystal growth operation process.

Description

technical field [0001] The invention relates to the field of automatic control of industrial production, in particular to an automatic control system for sapphire crystal growth by the Kyropoulos method. Background technique [0002] Sapphire single crystal has a unique lattice structure, excellent mechanical properties and thermal properties, and is widely used in the fields of optical technology and electronic technology, and has also become the material of choice in the current LED market. With the gradual development of the domestic LED industry, the performance index requirements for sapphire substrates are getting higher and higher. At present, most of the domestic sapphire crystal growth processes use the Kyropoulos method. The quality of sapphire crystal is not only related to the structure and performance of the single crystal furnace, but also depends on the growth process. The traditional crystal growth process has a low degree of automation, and the crystal grow...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the problem of low automation in the existing crystal growth process, and propose a high-reliability, fully automated automatic control system for sapphire crystal growth by the Kyropoulos method, which reduces human intervention and impact on the crystal growth process. The dependence on the technical ability of the operator improves the standardization and crystal quality of the crystal growth operation process

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