元件清單:
Comment Designator LibRef
蜂鳴器 BUUZER BUZZER
電解電容 C1 10uF
電解電容 C2 220uF
瓷片電容 C3, C4 18pF
電解電容 C5 470uF
瓷片電容 C6 104
排針 DC 5V Header 2
觸點開關 JIA, JIAN,RESET SW-PB
液晶 LCD1602 LCD1602
發光二極管 LED1, POWER SI3317-H
灰塵傳感器 PM1 GP2Y1010AU
溫濕度傳感器 U3 dht11
三極管 Q1 S8550
排阻 R1 4.7K
電阻 R2, R4, R5, R6 2K
電阻 R10 150
電阻 R3 10K
自鎖開關 SW1 SW-SPDT
單片機座 U1 DIP-40
單片機 U1 STC89C52
A/D模數轉換芯片 U2 ADC0832
晶振 Y1 11.0592M
制作出來的實物圖如下:
Altium Designer畫的原理圖和PCB圖如下:(51hei附件中可下載工程文件)
仿真原理圖如下(proteus仿真工程文件可到本帖附件中下載)由于Proteus里面沒有pm2.5模塊的庫 所以用的一個可變電阻來代替
單片機源程序如下:
- #include"LCD1602.h" //添加LCD1602頭文件
- #include"dht11.h" //添加DHT11頭文件
- #include"adc0832.h"
- #include<math.h>
- sbit BUZZER = P1^3; //蜂鳴器驅動端口==P1^3
- sbit Reduc = P3^2; //按鍵鍵輸入端口==P1^7
- sbit Add = P3^3; //按鍵加輸入端口==P3^1
- sbit Mode = P3^4; //按鍵加輸入端口==P3^1
- sbit LED1=P2^0;
- sbit LED2=P2^1;
- uchar Rx_buf[4],Rxnum=0;
- uchar T1L=15,T1H=35,R1L=30,R1H=80;
- void InitUART(void) //這是串口的基本配置,配置他的波特率是9600.這些參數都是標準的。
- {
- TMOD = 0x20;
- SCON = 0x50;
- TH1 = 0xFD;
- TL1 = TH1;
- PCON = 0x00;
- EA = 1;
- ES = 1;
- TR1 = 1;
- }
- /*
- * UART 發送一字節
- */
- void UART_send_byte(char dat)
- {
- SBUF = dat;
- while (TI == 0);
- TI = 0;
- }
- /*
- * UART 發送字符串
- */
- void UART_send_string(unsigned char *buf)
- {
- while (*buf != '\0')
- {
- UART_send_byte(*buf++);
- }
- }
- /************************************************
- ** 函數名稱 : void main(void)
- ** 函數功能 : 主函數
- ** 輸 入 : 無
- ** 輸 出 : 無
- ** 說 明 :
- ************************************************/
- void main(void)
- {
- double PM,pm1,pm2;
- int PMVAL=0,HPM=200,PM_count=0,pm1_count=0;
- uchar T1_data=0,R1_data=0,T2_data=0,R2_data=0;//溫度、濕度變量
- uchar shezhi_flag=1,Mode_flag=1,n=1;//設置變量
- uchar bueezr_flag=0,count=0,buzzer_time=9;//蜂鳴器報警變量
- uint Mode_count=0;
- uchar disp[16] ={"PM2.5:0000ug/m3 "};
- uchar disp1[16]= {"T :00C RH:00%"};
- uchar Tx_Buf[15];
- InitUART(); //初始化串口
- LCD_Init();
- WriteChar(1,0,16,disp); //在第一行顯示‘內容’
- WriteChar(2,0,16,disp1); //在第二行顯示‘內容’
- while(1)
- {
-
- T1_data=Read_TRH(0,0);//溫度
- disp1[3]=T1_data/10+0x30;//十位
- disp1[4]=T1_data%10+0x30;//個位
- R1_data=Read_TRH(1,0);//濕度
- disp1[13]=R1_data/10+0x30;//十位
- disp1[14]=R1_data%10+0x30;//個位
-
- pm1+=read_data(1);
- if(++PM_count>=20)
- {
- PM_count=0;
- pm1=pm1/20;
- pm2+=pm1;
- pm1=0;
- if(++pm1_count>=5)
- {
- pm1_count=0;
- PM=pm2/5;
- PM=PM*50/255;
- PM-=4;
- PM/=5;
- PM*=1000;
- PMVAL=PM;
- PMVAL+=235; PMVAL=PMVAL/9;
- if(PMVAL>=9999)PMVAL=9999;
- WriteCOMDATA(0x86,0);
- if(PMVAL<0)//PMVAL=0;
- {WriteCOMDATA(0+0x30,1);PMVAL=abs(PMVAL);}
- else WriteCOMDATA(PMVAL/1000+0x30,1);
- WriteCOMDATA(PMVAL/100%10+0x30,1);
- WriteCOMDATA(PMVAL/10%10+0x30,1);
- WriteCOMDATA(PMVAL%10+0x30,1);
- PM=pm1=pm2=0;
- }
- }
- /*調用報警函數,溫濕度是否在設定范圍內*/
- //溫度值與報警值比較
- if(T1_data<T1L)
- {
- bueezr_flag=1;//報警標志位置1
- }
- else if(T1_data>T1H)
- {
- bueezr_flag=1;//報警標志位置1
- }
- //濕度值與報警值比較
- if(R1_data<R1L)
- {
- bueezr_flag=1;//報警標志位置1
- }
- else if(R1_data>R1H)
- {
- bueezr_flag=1;//報警標志位置1
- }
- //PM值與報警值比較
- if(PMVAL>HPM)
- {
- bueezr_flag=1;
- }
- if(T1_data>T1L&&T1_data<T1H && R1_data>R1L&&R1_data<R1H && PMVAL<HPM)
- {
- bueezr_flag=0;
- BUZZER=1;
- }
- /*******蜂鳴器報警********/
- count++;if(count>buzzer_time*10)count=buzzer_time+1;
- if(count%buzzer_time==0 && bueezr_flag)
- {
- BUZZER=~BUZZER;//蜂鳴器取反 發出聲音提示
- }
-
- /*******Mode鍵設置報警參數********/
- if(Mode==0 && Mode_flag)
- {
- WriteCOMDATA(0x0F,0);//LCD顯示光標
- Delay(100);
- if(Mode==0)
- {
- BUZZER=1;
- bueezr_flag=0;
- Mode_flag=0;
- shezhi_flag=1;
- n=1;
- while(1)
- {
- switch(shezhi_flag)
- {
- case 1:
- if(n)
- {
- n=0;
- WriteChar(1,0,16,"T1L:00C T1H:00C");//在第一行顯示內容
- WriteChar(2,0,16,"R1L:00% R1H:00%");//在第二行顯示內容
- WriteCOMDATA(0x8D,0);WriteCOMDATA(T1H/10+0x30,1);
- WriteCOMDATA(0x8E,0);WriteCOMDATA(T1H%10+0x30,1);
- WriteCOMDATA(0xC4,0);WriteCOMDATA(R1L/10+0x30,1);
- WriteCOMDATA(0xC5,0);WriteCOMDATA(R1L%10+0x30,1);
- WriteCOMDATA(0xCD,0);WriteCOMDATA(R1H/10+0x30,1);
- WriteCOMDATA(0xCE,0);WriteCOMDATA(R1H%10+0x30,1);
- }
- WriteCOMDATA(0x84,0);WriteCOMDATA(T1L/10+0x30,1);
- WriteCOMDATA(0x85,0);WriteCOMDATA(T1L%10+0x30,1);
- WriteCOMDATA(0x85,0);
- break;
- case 2:
- WriteCOMDATA(0x8D,0);WriteCOMDATA(T1H/10+0x30,1);
- WriteCOMDATA(0x8E,0);WriteCOMDATA(T1H%10+0x30,1);
- WriteCOMDATA(0x8E,0);
- break;
- case 3:
- WriteCOMDATA(0xC4,0);WriteCOMDATA(R1L/10+0x30,1);
- WriteCOMDATA(0xC5,0);WriteCOMDATA(R1L%10+0x30,1);
- WriteCOMDATA(0xC5,0);
- break;
- case 4:
- WriteCOMDATA(0xCD,0);WriteCOMDATA(R1H/10+0x30,1);
- WriteCOMDATA(0xCE,0);WriteCOMDATA(R1H%10+0x30,1);
- WriteCOMDATA(0xCE,0);
- break;
- case 5:
- if(n)
- {
- n=0;
- WriteChar(1,0,16," PM2.5 SET ");//在第一行顯示內容
- WriteChar(2,0,16,"HPM2.5: ug/m3");//在第二行顯示內容
- }
- WriteCOMDATA(0xC7,0);
- WriteCOMDATA(HPM/1000+0x30,1);
- WriteCOMDATA(HPM/100%10+0x30,1);
- WriteCOMDATA(HPM/10%10+0x30,1);
- WriteCOMDATA(HPM%10+0x30,1);
- WriteCOMDATA(0xCA,0);
- break;
- }
- Delay(200);
- //加
- if(Reduc==0)
- {
- Delay(200);
- //while(Reduc==0);
- switch(shezhi_flag)
- {
- case 1:T1L+=1;break;
- case 2:T1H+=1;break;
- case 3:R1L+=1;break;
- case 4:R1H+=1;break;
- case 5:HPM+=1;break;
- }
- }
- //減
- if(Add==0)
- {
- Delay(200);
- //while(Add==0);
- switch(shezhi_flag)
- {
- case 1:T1L-=1;break;
- case 2:T1H-=1;break;
- case 3:R1L-=1;break;
- case 4:R1H-=1;break;
- case 5:HPM-=1;break;
- }
- }
- //短按切換設置項目 長按退出設置頁面
- if(Mode==0)
- {
- Delay(300);
- while(Mode==0)
- {
- Delay(300);
- Mode_count++;
- if(Mode_count>6)
- {
- WriteChar(1,0,16,"PM2.5:0000ug/m3 ");//在第一行顯示內容
- WriteCOMDATA(0x86,0);
- if(PMVAL<0)//PMVAL=0;
- {WriteCOMDATA(0+0x30,1);PMVAL=abs(PMVAL);}
- else WriteCOMDATA(PMVAL/1000+0x30,1);
- WriteCOMDATA(PMVAL/100%10+0x30,1);
- WriteCOMDATA(PMVAL/10%10+0x30,1);
- WriteCOMDATA(PMVAL%10+0x30,1);
- WriteChar(2,0,16,disp1); //在第二行顯示內容
- }
- }
- if(Mode_count>6)
- {
- Mode_count=0;shezhi_flag=0;
- //當下限值大于上限值時,蜂鳴器鳴叫1S提示,參數設置有誤
- if(T1L>T1H || R1L>R1H)
- {
- BUZZER=0;Delay(1000);BUZZER=1;
- }
- //否則退出設置頁面,返回主頁面
- else
- {
- ……………………
- …………限于本文篇幅 余下代碼請從51黑下載附件…………
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基于51單片機空氣質量檢測設計全套資料(仿真+原理圖+PCB+源碼).7z
(6.24 MB, 下載次數: 330)
2021-5-10 20:52 上傳
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