基于51单片机的水位水质检测系统Proteus仿真原理图PCB

功能：

0.本系统采用STC89C52作为单片机

1.LCD1602液晶实时显示水位、水质百分比

2.按键设置水位水质阈值并通过液晶显示

3.具备4个LED分别作为水位水质的上下限指示灯

4.具备声光报警功能

5.设置的阈值数据掉电不丢失

6.两组继电器可外接进水和出水设备，当水位超过上下限时对应的继电器会切换状态

7.采用DC002作为电源接口可直接输入5V给整个系统供电

原理图：

PCB ：

主程序：

#include <stdio.h>#include <reg52.h>#include "tlc0832.h"#include "lcd1602.h"#include "eepom52.h"#include "delay.h"sbit KEY_ENTER = P3^5;//自动手动模式切换按键sbit KEY_SET = P3^3;//设置按键sbit KEY_ADD = P3^4;//加按键sbit KEY_SUB = P3^6;//减按键sbit LED_WATER_DEPTH_UP = P1^3; //水位上限指示灯sbit LED_WATER_DEPTH_LOW = P1^4; //水位下限指示灯sbit LED_WATER_QUALITY_UP = P1^5; //水质上限指示灯sbit LED_WATER_QUALITY_LOW = P1^6; //水质上限指示灯sbit BUZZER = P2^2; //蜂鸣器sbit RELAY1 = P2^0; //继电器1 进水sbit RELAY2 = P2^1; //继电器2 出水void UpdataWaterValue(); //更新当前水深到LCD1602void UpdataMinMaxWaterValue(); //更新最大最小水深到LCD1602void UpdateEEPROM(); //更新eeprom存储的数据void InitEEPROM();//初始化eepromvoid Check(); //水位检测比较报警函数bit refreshFlag = 1;unsigned char curWaterDepth = 0; //当前水深unsigned char maxWaterDepth = 70; //最大水深unsigned char minWaterDepth = 0; //最小水深unsigned char setFlag = 0;//设置按键标志位bit alarmFlag = 0; //报警标志位unsigned char curWaterQuality = 0; //当前水质unsigned char maxWaterQuality = 70; //最大浊度unsigned char minWaterQuality = 0; //最小浊度void KeyScan(void){if (KEY_SET == 0) //设置按键按下{DelayMs(2);if (KEY_SET == 0){setFlag++;if (setFlag >= 5){setFlag = 1;}switch(setFlag){case 0: LCD_DispOneChar( 5, 0, ' ' ); LCD_DispOneChar( 11, 0, ' ' ); LCD_DispOneChar( 5, 1, ' ' ); LCD_DispOneChar( 11, 1, ' ' ); break;case 1: LCD_DispOneChar( 5, 0, '>' ); LCD_DispOneChar( 11, 0, ' ' ); LCD_DispOneChar( 5, 1, ' ' ); LCD_DispOneChar( 11, 1, ' ' ); break;case 2: LCD_DispOneChar( 5, 0, ' ' ); LCD_DispOneChar( 11, 0, '>' ); LCD_DispOneChar( 5, 1, ' ' ); LCD_DispOneChar( 11, 1, ' ' ); break;case 3: LCD_DispOneChar( 5, 0, ' ' ); LCD_DispOneChar( 11, 0, ' ' ); LCD_DispOneChar( 5, 1, '>' ); LCD_DispOneChar( 11, 1, ' ' ); break;case 4: LCD_DispOneChar( 5, 0, ' ' ); LCD_DispOneChar( 11, 0, ' ' ); LCD_DispOneChar( 5, 1, ' ' ); LCD_DispOneChar( 11, 1, '>' ); break;}while (KEY_SET == 0);UpdateEEPROM();}}if (KEY_ADD == 0 && setFlag != 0) //加键按下{DelayMs(180);if (KEY_ADD == 0 && setFlag != 0){switch (setFlag){case 0:break;case 1:if (maxWaterDepth < 100)maxWaterDepth++;break;case 2:if (minWaterDepth < maxWaterDepth)minWaterDepth++;break;case 3:if (maxWaterQuality < 100)maxWaterQuality++;break;case 4:if (minWaterQuality < maxWaterQuality)minWaterQuality++;break;}UpdataMinMaxWaterValue();//while (KEY_ADD == 0);UpdateEEPROM();}}if (KEY_SUB == 0 && setFlag != 0) //减键按下{DelayMs(180);if (KEY_SUB == 0 && setFlag != 0){switch (setFlag){case 0:break;case 1:if (maxWaterDepth > minWaterDepth)maxWaterDepth--;break;case 2:if (minWaterDepth > 0)minWaterDepth--;break;case 3:if (maxWaterQuality > minWaterQuality)maxWaterQuality--;break;case 4:if (minWaterQuality > 0)minWaterQuality--;break;}UpdataMinMaxWaterValue();//while (KEY_SUB == 0);UpdateEEPROM();}}if (KEY_ENTER == 0) //确认键按下{DelayMs(2);if (KEY_ENTER == 0){setFlag = 6;LCD_DispOneChar(5, 0, ' ');LCD_DispOneChar(11, 0, ' ');LCD_DispOneChar(5, 1, ' ');LCD_DispOneChar(11, 1, ' ');while (KEY_ENTER == 0);}}}/************************* 定时器0初始化 *************************/void Timer0_Init(void){TMOD &= 0xF0;TMOD |= 0x01; //使用模式1，16位定时器，使用"|"符号可以在使用多个定时器时不受影响TH0 = (65536 - 9216) / 256; //重新赋值 10msTL0 = (65536 - 9216) % 256;EA = 1; //总中断打开ET0 = 1; //定时器中断打开TR0 = 1; //定时器计数打开// PT0 = 1; //高优先级}//主函数void main(){Timer0_Init();InitEEPROM();//初始化eepromLCD_Init(); //初始化1602LCD_Clear();LCD_DispStr(0, 0, "W: H: L: ");LCD_DispStr(0, 1, "Z: H: L: ");UpdataWaterValue(); //更新当前水深到LCD1602UpdataMinMaxWaterValue(); //更新最大最小水深到LCD1602BUZZER = 1; //关闭蜂鸣器LED_WATER_DEPTH_UP = 1;LED_WATER_DEPTH_LOW = 1;while (1){if (refreshFlag == 1){refreshFlag = 0;UpdataWaterValue();UpdataMinMaxWaterValue();Check();//水位检测比较报警函数}KeyScan();}}//更新当前水深到LCD1602void UpdataWaterValue(){unsigned char lcd1602_data[4] = {0};curWaterDepth = ReadADC(AIN1_GND);curWaterDepth = curWaterDepth * 100 / 255;if (curWaterDepth > 99){curWaterDepth = 99;}lcd1602_data[0] = curWaterDepth % 100 / 10 + 48;lcd1602_data[1] = curWaterDepth % 10 + 48;LCD_DispStr(2, 0, lcd1602_data);DelayMs(10);curWaterQuality = ReadADC(AIN0_GND);curWaterQuality = 100 * (255 - curWaterQuality) / 255;if (curWaterQuality > 99){curWaterQuality = 99;}lcd1602_data[0] = curWaterQuality % 100 / 10 + 48;lcd1602_data[1] = curWaterQuality % 10 + 48;LCD_DispStr(2, 1, lcd1602_data);DelayMs(10);}//更新最大最小水深到LCD1602void UpdataMinMaxWaterValue(){unsigned char lcd1602_data[4] = {0};if (maxWaterDepth > 99){maxWaterDepth = 99;}lcd1602_data[0] = maxWaterDepth % 100 / 10 + 48;lcd1602_data[1] = maxWaterDepth % 10 + 48;LCD_DispStr(8, 0, lcd1602_data);if (minWaterDepth > 99){minWaterDepth = 99;}lcd1602_data[0] = minWaterDepth % 100 / 10 + 48;lcd1602_data[1] = minWaterDepth % 10 + 48;LCD_DispStr(14, 0, lcd1602_data);if (maxWaterQuality > 99){maxWaterQuality = 99;}lcd1602_data[0] = maxWaterQuality % 100 / 10 + 48;lcd1602_data[1] = maxWaterQuality % 10 + 48;LCD_DispStr(8, 1, lcd1602_data);if (minWaterQuality > 99){minWaterQuality = 99;}lcd1602_data[0] = minWaterQuality % 100 / 10 + 48;lcd1602_data[1] = minWaterQuality % 10 + 48;LCD_DispStr(14, 1, lcd1602_data);}//初始化eepromvoid InitEEPROM(){unsigned char is_first_init = ReadByte(0x);if (is_first_init == 1){maxWaterDepth = ReadByte(0x2000);minWaterDepth = ReadByte(0x2001);maxWaterQuality = ReadByte(0x2002);minWaterQuality = ReadByte(0x);}else{EraseSector(0x2000);WriteByte(0x2000, maxWaterDepth);WriteByte(0x2001, minWaterDepth);WriteByte(0x2002, maxWaterQuality);WriteByte(0x, minWaterQuality);WriteByte(0x, 1);}}//更新eeprom存储的数据void UpdateEEPROM(){EraseSector(0x2000);WriteByte(0x2000, maxWaterDepth);WriteByte(0x2001, minWaterDepth);WriteByte(0x2002, maxWaterQuality);WriteByte(0x, minWaterQuality);WriteByte(0x, 1);}//水位检测比较报警函数void Check(){if( curWaterDepth < minWaterDepth || curWaterDepth > maxWaterDepth || curWaterQuality > maxWaterQuality || curWaterQuality < minWaterQuality ){alarmFlag = 1;}else{alarmFlag = 0;}if(curWaterDepth < minWaterDepth){LED_WATER_DEPTH_UP = 1;LED_WATER_DEPTH_LOW = 0;}else if(curWaterDepth > maxWaterDepth){LED_WATER_DEPTH_UP = 0;LED_WATER_DEPTH_LOW = 1;}else{LED_WATER_DEPTH_UP = 1;LED_WATER_DEPTH_LOW = 1;}if(curWaterQuality < minWaterQuality){LED_WATER_QUALITY_UP = 1;LED_WATER_QUALITY_LOW = 0;}else if(curWaterQuality > maxWaterQuality){LED_WATER_QUALITY_UP = 0;LED_WATER_QUALITY_LOW = 1;}else{LED_WATER_QUALITY_UP = 1;LED_WATER_QUALITY_LOW = 1;}if(curWaterDepth < minWaterDepth){RELAY1 = 0; RELAY2 = 1;}else if(curWaterDepth >= maxWaterDepth){RELAY2 = 0; RELAY1 = 1;}else {RELAY2 = 1; RELAY1 = 1; }}/************************* 定时器0中断处理 *************************/void Timer0_Interrupt(void) interrupt 1{static unsigned int time10ms = 0;TH0 = (65536 - 9216) / 256; //重新赋值 10msTL0 = (65536 - 9216) % 256;time10ms++;if (time10ms > 50){time10ms = 0;refreshFlag = 1; //刷新标志if (alarmFlag == 1){BUZZER = !BUZZER;}else{BUZZER = 1;}}}

仿真演示视频：

/video/BV1o84y1C7ZN/

实物演示视频：

/video/BV1SP4y1R7N9/