#第九届立创电赛#基于Air001的加热台 - 立创电子设计大赛

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第九届立创电子设计开源大赛

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<div class="document"> <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">1、项目功能介绍</h3> <hr class="horizontal-splitline normal-bold-2"> 使用合宙Air001单片机设计一个pid恒温加热台 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">2、项目属性</h3> <hr class="horizontal-splitline normal-bold-2"> 开源项目 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">3、开源协议</h3> <hr class="horizontal-splitline normal-bold-2"> GPL3.0 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">4、硬件部分</h3> <hr class="horizontal-splitline normal-bold-2"> 采集部分使用电阻分压电路采集热敏电阻两端电压值，推算出电阻值即可查表获取温度值；继电器控制部分采用三极管驱动，线圈接二极管用于续流；设计了两个按键，一个boot0用于下载程序，另一个用于用户控制；电源部分采用220v转5v的开关电源板，可在某购物网站上买到；三色LED灯显示当前状态：蓝灯闪-待机中，温度低，红灯闪-待机中，温度高，绿灯闪-加热中，绿灯亮-到达指定温度。 <h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">5、软件部分</h3> <hr class="horizontal-splitline normal-bold-2"> #define Relay PA_6 #define A0 PA_5 #define Button PB_3 #define Red PB_1 #define Green PB_2 #define Blue PB_0 int T[251] = {4033, 4030, 4027, 4024, 4020, 4017, 4013, 4009, 4005, 4000, 3996, 3991, 3986, 3981, 3976, 3971, 3965, 3959, 3953, 3947, 3941, 3934, 3927, 3920, 3912, 3905, 3896, 3888, 3880, 3871, 3862, 3852, 3842, 3832, 3822, 3811, 3800, 3788, 3777, 3764, 3752, 3739, 3725, 3712, 3697, 3683, 3668, 3653, 3637, 3621, 3604, 3587, 3569, 3551, 3533, 3514, 3495, 3475, 3455, 3434, 3413, 3391, 3369, 3347, 3324, 3301, 3277, 3253, 3228, 3203, 3178, 3152, 3125, 3099, 3072, 3044, 3017, 2989, 2960, 2932, 2902, 2873, 2844, 2814, 2784, 2753, 2723, 2692, 2661, 2630, 2599, 2567, 2536, 2504, 2472, 2441, 2409, 2377, 2345, 2313, 2285, 2249, 2218, 2186, 2154, 2123, 2091, 2060, 2029, 1998, 1967, 1936, 1906, 1876, 1846, 1816, 1786, 1757, 1728, 1699, 1670, 1642, 1615, 1587, 1559, 1549, 1506, 1479, 1453, 1427, 1402, 1377, 1352, 1328, 1304, 1280, 1257, 1234, 1211, 1189, 1167, 1145, 1124, 1103, 1082, 1062, 1042, 1022, 1003, 984, 966, 947, 929, 912, 894, 877, 861, 844, 828, 812, 797, 781, 766, 752, 737, 724, 710, 697, 683, 670, 657, 645, 632, 620, 608, 597, 586, 575, 564, 553, 543, 532, 522, 512, 503, 494, 484, 475, 466, 458, 449, 440, 433, 424, 416, 409, 401, 394, 387, 380, 372, 366, 359, 352, 346, 340, 334, 327, 321, 316, 310, 305, 299, 294, 288, 283, 279, 273, 269, 264, 260, 255, 250, 246, 242, 237, 233, 230, 226, 222, 218, 214, 211, 207, 204, 200, 197, 193, 190, 187, 184, 181, 178, 175, 172, 169, 166, 164, 161, 158, 156 }; int pv; int sv = 200; int last_es; int es; int sum_es; int kp = 20; int ki = 5; int kd = 100; bool bzw; int loopTime; int last_value = 0; /****************初始化函数****************/ void setup() { //输入输出模式定义 pinMode(Relay, OUTPUT); pinMode(Red, OUTPUT); pinMode(Green, OUTPUT); pinMode(Blue, OUTPUT); pinMode(A0, INPUT); pinMode(Button, INPUT); //初始化端口 digitalWrite(Red,HIGH); digitalWrite(Green,HIGH); digitalWrite(Blue,HIGH); //串口初始化 Serial.begin(9600); //ADC配置 analogReadResolution(12); //PWM analogWriteFrequency(1); } /****************主循环函数****************/ void loop() { trig(); delay(10); loopTime = loopTime + 1; if (loopTime>=150) {Main();} if (bzw==1) { analogWrite(Green,0); analogWrite(Red,255); if (pv>=sv) {analogWrite(Blue,0);} else {analogWrite(Blue,255);} } else { analogWrite(Green,255); if (pv>70) {analogWrite(Red,128); analogWrite(Blue,255);} else {analogWrite(Blue,128); analogWrite(Red,255);} } //Serial.print("标志位:"); //Serial.println(bzw); } /****************查表函数****************/ int table() { for (int i=0; i<251; i++) { if (T[i]<=analogRead(A0)) {return i;} } } /****************比例环节****************/ int P() { es = sv - pv; int pValue = kp * es; return pValue; } /****************积分环节****************/ int I() { sum_es = es+sum_es; int iValue = sum_es * ki; return iValue; } /****************微分环节****************/ int D() { int dValue = kd * (es - last_es); last_es = es; return dValue; } /****************继电器控制****************/ void relayControl(int x) { float pid = x/2; if (pid>240) {pid = 255;} else if (pid<20) {pid = 0;} analogWrite(Relay, pid); } /****************串口通讯**************** void serialConnect() { while (Serial.available()) { char serialData = Serial.read(); Serial.println((char)serialData); } }*/ /****************按键扫描****************/ void trig() { if ((last_value==0) and (digitalRead(Button)==HIGH)) { bzw = !bzw; last_value = 1; } else if ((last_value==1) and (digitalRead(Button)==LOW)) { last_value = 0; } } /****************MAIN****************/ void Main() { pv = table(); Serial.print("当前温度:"); Serial.println(pv); //Serial.println(analogRead(A0)); int PID; if (bzw==1) { if (pv < (sv-30)) { relayControl(600); } else if (pv > (sv+15)) { relayControl(0); } else { PID = P() + I() + D(); //Serial.print("PID:"); //Serial.println(PID); relayControl(PID); } } else { PID = 0; relayControl(PID); last_es = 0; } loopTime = 0; } </div>