单片机电子秤程序惠斯特电桥接四个应变片的仿真原理图

ID:1066771 · 发表于 2023-3-15 23:43

本设计是采用的惠斯特电桥接四个应变片的仿真，实例代码和仿真原理图如下

仿真通过改变滑动变阻器阻值实现

单片机源程序如下:

#define#include<reg52.h>
#include<intrins.h>
#include <absacc.h>
#include <math.h>
#include<stdio.h>
#define uchar unsigned char
#define unit unsigned int
#define DATA P0
sbit lcden=P2^5;
sbit lcdrw=P2^6;
sbit lcdrs=P2^7;
sbit feng=P3^4;
sbit BYTE=P2^1;
sbit BUSY=P2^2;
//sbit CS=P2^2;
sbit RC=P2^0;
void init();
void write_com(uchar com);
void write_data(uchar date);
void write_word(unsigned char *s);
void DelayMS(unsigned int y) //延迟程序
{
unsigned int x;
for(y;y>0;y--)
for(x=110;x>0;x--);
}
void init(void) //LCD初始化程序
{
write_com(0x02);
write_com(0x38);//显示模式设置
write_com(0x0c); //开显示,不显示光标,光标不闪烁
write_com(0x06);//当读或写一个字符后地址指针加1,且光标加1,整屏显示不移动
write_com(0x01); //清屏
DelayMS(50);
}
void write_com(uchar com)
{
lcdrs=0;//写指令
lcdrw=0;
DATA=com;
lcden=1;
DelayMS(5);
lcden=1;
DelayMS(5);
lcden=0;
}
void write_data(uchar date)
{
lcdrs=1;
DATA=date;
DelayMS(5);
lcden=1;
DelayMS(5);
lcden=0;
}
void write_word(unsigned char *s)
{
while(*s>0)
{
write_data(*s);
s++;
}
}
void Display(int weight)
{
int bw,sw,gw,yw,ew;
unit dat;
dat=weight*100;
bw=dat/10000; //取得百位数字
sw=dat%10000/1000;//取得十位数字
gw=dat%10000%1000/100;//取得个位数字
yw=dat%10000%1000%100/10; //小数点后一位
ew=dat%10000%1000%100%10; //小数点后二位
// bw=dat/10000; //取得百位数字
// sw=dat%10000/1000;//取得十位数字
// gw=dat/100%10;//取得个位数字
// yw=dat/10%10; //小数点后一位
// ew=dat%10000; //小数点后二位
write_com(0x89);
write_data(0x30+bw);
write_com(0x8a);
write_data(0x30+sw);//数字+30得到该数字的LCD1602显示码
write_com(0x8b);
write_data(0x30+gw);//数字+30得到该数字的LCD1602显示码
write_com(0x8c);
write_data('.');
write_com(0x8d);
write_data(0x30+yw);//数字+30得到该数字的LCD1602显示码
write_com(0x8e);
write_data(0x30+ew);//数字+30得到该数字的LCD1602显示码
write_com(0x8f);
write_data(0x67); //显示"g"符号，
}
void Display2(int weight)
{
int ww,qw,bw,sw,gw;
unit dat;
dat=weight;
ww=dat/10000; //取得wan位数字
qw=dat%10000/1000;//取得qian位数字
bw=dat%10000%1000/100;//取得bai位数字
sw=dat%10000%1000%100/10; //shi位
gw=dat%10000%1000%100%10; //ge位
write_com(0xC1);
write_data(0x30+ww);
write_com(0xC2);
write_data(0x30+qw);//数字+30得到该数字的LCD1602显示码
write_com(0xC3);
write_data(0x30+bw);//数字+30得到该数字的LCD1602显示码
write_com(0xC4);
write_data(0x30+sw);//数字+30得到该数字的LCD1602显示码
write_com(0xC5);
write_data(0x30+gw);//数字+30得到该数字的LCD1602显示码
}
int ADS7825_Convert()
{
unit temp;
uchar temp1,temp2;
// CS=0;
RC=1;
RC=0;
DelayMS(1);
RC=1;
while(BUSY==0);
RC=1;
BYTE=0;
DelayMS(1);
temp1=P1; //高八位
BYTE=1;
DelayMS(1);
temp2=P1; //低八位
// CS=1;
// temp=temp1;
temp=(temp1<<8)+temp2;
return temp;
}
int DataProcess(result)
{
/*计算电压值*/
double voltage_value,weight_value;
voltage_value = (unsigned long)(((double)result * 10 / 32767) * 1000 + 0.5);
voltage_value = (unsigned long)(((double)result*0.0457-59.486));
// weight_value = voltage_value/0.04;
// return weight_value;
return voltage_value;
}
void main(void)
{
int result,weight,result1,result2,result3,result4,result5,result6,result7,result8,result9,result10;
//unsigned char str[8]={0};
//DelayMS(500);
lcdrs=0;
lcdrw=0;
lcden=0;
feng=1;
init();
while(1)
{
result1=ADS7825_Convert();
DelayMS(5);
result2=ADS7825_Convert();
DelayMS(5);
result=(result1+result2)/2;
result3=ADS7825_Convert();
DelayMS(5);
result=(result+result3)/2;
result4=ADS7825_Convert();
DelayMS(5);
result=(result+result4)/2;
result5=ADS7825_Convert();
DelayMS(5);
result=(result+result5)/2;
result6=ADS7825_Convert();
DelayMS(5);
result=(result+result6)/2;
result7=ADS7825_Convert();
DelayMS(5);
result=(result+result7)/2;
result8=ADS7825_Convert();
DelayMS(5);
result=(result+result8)/2;
result9=ADS7825_Convert();
DelayMS(5);
result=(result+result9)/2;
result10=ADS7825_Convert();
DelayMS(5);
result=(result+result10)/2;
DelayMS(100);
Display2(result);
result=(result1+result2+result3+result4+result5+result6+result7+result8+result9+result10)/10;
weight=DataProcess(result);
if(weight>=300)
{
feng=0;
}
else
{
feng=1;
}
write_com(0x80);
write_word(" ");
write_word("Weight:");
Display(weight);
DelayMS(500);
}
}