本論文開始於計畫設計染整業的染色控制器專案。當時與染整公司洽談合作開發案，因染整公司方因素終止其合作開發案。但染色控制器與窯爐溫控器架構部分相同，故轉而進行窯爐溫控器的研製。窯爐是窯業設備中最貴重的產品，且窯爐控制器與窯爐密不可分。現代製陶人仍然使用著無電腦控制燒成曲線的溫度控制器為主。由於不同的燒成曲線，能夠燒出不同的製品-如青白瓷等。製陶人常需要人工的修正燒成曲線做試驗，沒辦法使用自動控制燒成曲線的種類。現今的數位溫度控制器價格依然頗高，一般的控制器如OMROM E5CN-Q2H03T-FLK價位約為台幣5600元。故開發一個具有低價位且具有電腦控制燒成曲線的功能的窯爐溫控器就成為一個重要課題。由於台灣高溫窯爐溫控器的相關論文較少，故整理此論文做為日後參考。
本論文試著改善其溫度控制器的成本，並且增加電腦連線的功能，本論文採用5塊錢美金的低功率微處理器MSP430為控制核心，他內建12 bit ADC解析度足以應用於溫度電壓讀值；MSP430具有硬體的32位元乘法器，可以快速的直接計算PID控制值。本論文採用具有冷端點補償特性的熱電偶放大器AD8495作為輸入熱電偶的電壓放大器。本論文選用松下電機的具有5安培交流電額定電流能力的固態繼電器來做火力調整。溫度控制系統架構以溫度輸入K型熱電偶感測溫度的微電壓，再由冷端點補償熱電偶放大器放大微電壓以供ADC輸入使用，使MSP430內建12位元A/D轉換器轉換電壓以供PID程序計算輸出PWM調整信號；輸出信號PWM輸出到SSR，SSR透過外接的交流電提供電力給電熱絲，依據PWM DUTY 的Ton時間大小，可以實現控制烤箱或者是窯爐的溫度的目的。
以烤箱來做DUT的實驗結果顯示，本論文提出的自調適增量式PID控制器(Auto Tuning Increment PID Controller)比Relay PID Controller具有較快的Settling Time，快了64分鐘並且只有0.47度的Overshoot。使用窯爐測試時，本論文提出的自調適增量式PID控制器(Auto Tuning Increment PID Controller)能夠讓窯爐升溫到900度，在這個高溫的環境下，能夠良好的工作、並且不受環境的影響，符合窯爐工業的需要。

In this thesis we design a MSP430-based temperature controller applied to the furnace used to manufacture expensive ceramic products. In the high temperature furnace the furnace controller and furnace are inseparable. Modern ceramics needs precise computer-based control of the firing curve to achieve the needed the temperature profile. Pottery is using different firing curve to burn a variety of products - such as the blue and white Porcelain. They traditional need manual correction firing curve during production. The development of automatic control of the firing curve is crucial to the improvement of the quality and yield of the ceramic products. Today's digital temperature controller prices are still high. In general, such as OMROM E5CN-Q2H03T-FLK price is about NT $ 5600 dollars. Therefore, the development low-cost computer-based firing curve function of the furnace thermostat becomes an important topic. In the process to design the temperature controller with high temperature control range, we find that relevant papers for furnace thermostat are scarce in Taiwan. We create this paper to serve as a reference for further development.
In order to reduce cost of the temperature controller and add the computer monitoring capability, we select low-cost and low-power microprocessor MSP430 as the MCU with built-in 12-bit ADC resolution which would be sufficient for temperature voltage reading. The MSP430 has 32-bit hardware multiplier can efficiently compute PID control values. In high temperature environment, the temperature conversion has to use cold junction compensated thermocouple amplifier - AD8495 to be an input amplifier. This thesis selected the Panasonic motor with 5 amps AC rated current capacity of solid state relays as the output firing control. The system use thermocouple to sense temperature in micro voltage which feeds voltage to AD8495 and gain micro volt to mini volt for ADC input. After that, PID process calculates the output of PWM level to control SSR. According to the PWM DUTY ON duration, it realizes method of control the furnace temperature.
We implement Auto Tuning Increment PID algorithm in the controller. In small scale oven experiment result shows the Auto Tuning Increment PID algorithm achieve steady earlier than the Relay PID Controller does by 64 minutes. Our algorithm also has 0.47 degrees smaller overshoot. In real kiln’s experiment result, the Auto Tuning Increment PID Controller is able to heat the furnace up to 900 degrees in the high temperature environment. The Auto Tuning Increment PID Controller has good system response in this high temperature environment. Our system can be employed in the kiln’s industry and meet their requirement.

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