計(jì)算機(jī)控制課程設(shè)計(jì)_基于pid算法的電加熱爐溫度控制系統(tǒng)設(shè)計(jì)-資料下載頁(yè)
2025-05-07 20:54本頁(yè)面
【正文】 SWAP: MOV R0,20H MOV R1,03H SAW1: MOV DPTR,7FF8H MOVX @DPTR A ； A/D 轉(zhuǎn)化 MOV R2,20H DLY: DJNZ R2,DLY 。延時(shí) HERE: JB ,HERE MOV DPTR,7FF8H MOVX A,@DPTR ； 讀轉(zhuǎn)化結(jié)果 MOV @R0,A INC R0 DJNZ R1,SAM1 RET 數(shù)字濾波 FILTER: MOV A, 20H CJNE A,2DH CMP1 AJMP CMP2 CMP1: JNC CMP2 XCH A,2DH XCH A,2CH CMP2: MOV A,2DH CJNE A,22EH,CMP3 MOV 2AH,A AJMP RR CMP3: JC CMP4 MOV 2AH,A AJMP RR CMP4: MOV A,2EH CJNE A,2CH,CMP5 MOV 2AH ,A AJMP RR CMP5: JC CMP6 XCH A,2CH CMP6: MOV 2AH,A RR: RET T1 中斷 PIT1: CLR 00H JB 20H, GGG SETB ；關(guān)閉電爐 GG: CLR PT1 RETI GGG: SETB ；關(guān)閉風(fēng)扇 CLR 20H AJMP GG 本系統(tǒng)選用 AT89C51 作為控制器，溫度檢測(cè)部分選用 AD590 作為傳感器， ADC0809 作為 A/D轉(zhuǎn)換器，過(guò)零觸發(fā)器采用光耦驅(qū)動(dòng)電路及雙向可控硅電路。 通過(guò)理論推導(dǎo)和仿真驗(yàn)證，進(jìn)一步說(shuō)明數(shù)字 PID 進(jìn)行控制時(shí)的系統(tǒng)動(dòng)態(tài)性能指標(biāo)優(yōu)越。特別適用于對(duì)象為滯后的系統(tǒng)，因此 PID 算法是一種較好的控制算法，能在工業(yè)控制中得到較好地應(yīng)用。 The design of electric heating furnace temperature control system basing on the digital PID Abstract:The electric heating furnace belongs to the firstorder inertial .Its inertial,hysteretic and nonlinearity feature bring about difficulty to traditional control method. This curriculum design apply the digital PID theory to control the temperature of electric heating furnace ,so as to make the whole closedloop system39。 s transfer function to be a delay and Firstorder inertia link in series. As a result the temperature control system would work accurately. There are two strip heaters,powered by two PWM,using to change the temperature of the electric heating furnace .The output of the powerregulator is monitored by the given voltage of crosszero trigger . This curriculum design is based on the AT89C51 AD590 sensor is used to detect the temperature in the input channel and its values are send to the ADC0809 ,the chip which would change the analog single to digital output channel would drive the crosszero trigger which is also the actuator .If the two steps above are both activated,the strip heaters start to system use the PID algorithm ,aiming to control the temperature within 50～ 350℃ ,and realtime displaying the temperature values is able . Key words： electric heating furnace ； PID ； power ； temperature control
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