The Development Of Microchip-temperature Controlling System For Resistance Braze On The Basis Of Fuzzy Control

Resistance braze is one of the welding crafts that utilize the heat generated atelectrode and weldment when current is flowing. The craft is simple;the labor condition isgood, apt to realize the production automation. It can be applied to produce in weldingextensively. And for brazing, the quality of welding connector has much to do by thewelding temperature in the welding course. But to controlling the temperature, there is nota very effective, simple method all the time. So how to do the effective controlling for thewelding temperature, it is a subject that is very worth studying for the resistances braze.Because the heat used in resistance braze is come from the welding course that thecurrent is flowing through the electrode and weldment .In order to control the weldingtemperature, we can use the means that control the temperature by controlling the currentvalue and the current time.For this reason, this paper utilizes the fuzzy theory, set up the fuzzy system oftemperature control. We can gather the temperature signal and feedback it to system in realtime, dealt with the data by the fuzzy system. The process for fuzzy control includesfuzzification, fuzzy-inference, defuzzification. After fuzzy process, we output a controllingsignal and can realize the control to the temperature of welding.In the paper, we have adopted the Atmega128L microchip as a controlling core for thethermostatically control system. Have done the detailed introduction to the design of everyfunction module circuit of the microchip system. Provided the whole idea of designing offuzzy control procedure. Meanwhile we also design the professional trigger circuit tocontrol Thyristor.Proving in the test, it is feasible to control temperature by the system designed by us.