Temperature control method and system for platinum channel of float process

Abstract

The invention discloses a temperature control method for a platinum channel in a float process. The method comprises the following steps that an annular redundant network; and a main controller and a standby controller execute data sharing. The method concretely comprises: starting a system; performing initialization; reading data before a system is closed; simultaneously entering a hardware detection step and a sensor fault judgment step; if the hardware detection is normal, entering the step S16, otherwise, circularly executing the step; S16, executing the automatic climbing temperature rising program, and entering S17, otherwise, entering S18; S17, inputting curve data; entering S16' and S18' when the sensor fails, otherwise, entering S17' ; s16', performing a rejection weighting algorithm; s17', carrying out data weighted feedback, and entering S18; after all the sensors fail, locking output, closing the weighting algorithm, and then entering the step S20; S18, controlling the temperature; S19, performing a PID algorithm; S20, adjusting output adjustment; performing data backup; and sharing the data to the standby controller. The method has the advantages that the annular redundant network is established, and a weighting algorithm with a sensor fault recognition function is adopted, so that the temperature of the platinum channel of the float process is accurately controlled.

Description

technical field [0001] The invention relates to temperature control in the field of glass manufacturing, in particular to a temperature control method and a control system for a platinum channel in a float process. [0002] technical background [0003] There are three main process technologies for the production of glass substrates for flat panel displays, namely "Float Technology", "Slot Down Draw" and "Overflow Fusion Technology". The "float method" has the advantages of being able to produce wider glass products and greater production capacity due to the horizontal extension. The "overflow melting method" has the advantages of more controllable surface characteristics, no grinding, and a simpler process. The width is limited to less than 1.5 meters, so the production capacity is small. The "float method" can produce glass substrates suitable for various flat-panel displays, while the overflow melting method is currently only used to produce TFT-LCD glass substrates. [...

AI Technical Summary

Problems solved by technology

The "float method" has the advantages of being able to produce wider glass products and greater production capacity due to the horizontal extension. The "overflow melting method" has the advantages of more controllable surface characteristics, no grinding, and a simpler process. The width is limited to less than 1.5 meters, so the production capacity is small

Images