基于51單片機的震動報警器設(shè)計

基于51單片機和ADXL345震動檢測模塊檢測震動；用LED燈和蜂鳴器表示超限報警，用LCD顯示模擬檢測結(jié)果。

主要選用ADXL345三軸振動傳感器結(jié)合微分電路測得加速度，并且利用LCD顯示震動信號。

程序運行圖：

部分程序：

#include "system.h"

uint8 buffer[16];
int16 XAxisDegree,YAxisDegree,ZAxisDegree;
int16 XAxisDegreeTemp,YAxisDegreeTemp,ZAxisDegreeTemp;

int16 temp0,temp1;?? ??? ??? ??? ? //int ? ?int16
int8 XAlarmL=-90,XAlarmH=90;?? ??? ? ?//char ? int8
int8 YAlarmL=-90,YAlarmH=90;
int8 ZAlarmL=-90,ZAlarmH=90;

uint8 SystemSet;?? ??? ? ?//unsigned char uint8
bit tab;

void LcdDisplay(void)
{
int16 temp;

if(SystemSet==0)
{
if(XAxisDegree==0) ? ? ?LCD1602_DisStr(0,0,"X: ");
else if(XAxisDegree>0) ?LCD1602_DisStr(0,0,"X:+");
else ? ? ? ? ? ? ? ? ? ?LCD1602_DisStr(0,0,"X:-");
if(XAxisDegree<0) ?temp=(-1)*XAxisDegree; ?// 轉(zhuǎn)化為正數(shù)，顯示需要
else ? ? ? ? ? ? ? temp=XAxisDegree;
sprintf(buffer,"%02d.%d",temp/10,temp%10);
LCD1602_DisStr(0,3,buffer);

if(YAxisDegree==0) ? ? ?LCD1602_DisStr(0,9,"Y: ");
else if(YAxisDegree>0) ?LCD1602_DisStr(0,9,"Y:+");
else ? ? ? ? ? ? ? ? ? ?LCD1602_DisStr(0,9,"Y:-");
if(YAxisDegree<0) ?temp=(-1)*YAxisDegree;
else ? ? ? ? ? ? ? temp=YAxisDegree;
sprintf(buffer,"%02d.%d",temp/10,temp%10);
LCD1602_DisStr(0,12,buffer);

if(ZAxisDegree==0) ? ? ?LCD1602_DisStr(1,0,"Z: ");
else if(ZAxisDegree>0) ?LCD1602_DisStr(1,0,"Z:+");
else ? ? ? ? ? ? ? ? ? ?LCD1602_DisStr(1,0,"Z:-");
if(ZAxisDegree<0) ?temp=(-1)*ZAxisDegree;
else ? ? ? ? ? ? ? temp=ZAxisDegree;
sprintf(buffer,"%02d.%d",temp/10,temp%10);
LCD1602_DisStr(1,3,buffer);
}
else
{
if(SystemSet==1) ? ? ? LCD1602_DisStr(0,4,"<X Set>");
else if(SystemSet==2) ?LCD1602_DisStr(0,4,"<Y Set>");
else if(SystemSet==3) ?LCD1602_DisStr(0,4,"<Z Set>");

if(DataVal0==0) ? ? ?LCD1602_DisStr(1,0,"L: ");
else if(DataVal0>0) ?LCD1602_DisStr(1,0,"L:+");
else ? ? ? ? ? ? ?LCD1602_DisStr(1,0,"L:-");
if(temp0<0) ?temp=(-1)*DataVal0;?? ? ?//
else ? ? ? ? temp=DataVal0;
sprintf(buffer,"%02d",temp);
LCD1602_DisStr(1,3,buffer);

if(DataVal1==0) ? ? ?LCD1602_DisStr(1,9,"H: ");
else if(DataVal1>0) ?LCD1602_DisStr(1,9,"H:+");
else ? ? ? ? ? ? ?LCD1602_DisStr(1,9,"H:-");
if(temp1<0) ?temp=(-1)*DataVal1;
else ? ? ? ? temp=DataVal1;
sprintf(buffer,"%02d",temp);
LCD1602_DisStr(1,12,buffer);
}
}

// 角度測量
void DegreeMeasure(void)
{
uint16 temp;
int32 temp0;
int16 XTemp,YTemp,ZTemp;
double temp1;

ADXL345_ReadBytes();
temp=((uint16)XyzDataBuf[1]<<8)|XyzDataBuf[0]; // 合成數(shù)據(jù)
XTemp=(int16)temp; ? // 由于是以二進制補碼的形勢存放的數(shù)據(jù)，所以要編制轉(zhuǎn)換成帶符號的值
temp=((uint16)XyzDataBuf[3]<<8)|XyzDataBuf[2];
YTemp=(int16)temp;
temp=((uint16)XyzDataBuf[5]<<8)|XyzDataBuf[4];
ZTemp=(int16)temp;

temp0 = (int32)YTemp*YTemp;
temp0 += (int32)ZTemp*ZTemp;
temp1 = sqrt(temp0);
temp1 = atan(XTemp/temp1); ? ? ? ? ?// 計算傾角的弧度值
XAxisDegreeTemp= temp1*1800/PI; ? ? // 弧度值變?yōu)榻嵌戎?，放?0倍，保留1位小數(shù)

temp0 = (int32)XTemp*XTemp;
temp0 += (int32)ZTemp*ZTemp;
temp1 = sqrt(temp0);
temp1 = atan(YTemp/temp1);
YAxisDegreeTemp= temp1*1800/PI;

temp0 = (int32)YTemp*YTemp;
temp0 += (int32)XTemp*XTemp;
temp1 = sqrt(temp0);
temp1 = atan(ZTemp/temp1);
ZAxisDegreeTemp= temp1*1800/PI;
}

void CalcAvrgDegree(void)
{
static int16 XSum=0,XMin=900,XMax=-900;
static int16 YSum=0,YMin=900,YMax=-900;
static int16 ZSum=0,ZMin=900,ZMax=-900;
static uint8 i=0;

if(XMin>XAxisDegreeTemp) ?XMin=XAxisDegreeTemp; //求最小值
if(XMax<XAxisDegreeTemp) ?XMax=XAxisDegreeTemp; //求最大值
XSum += XAxisDegreeTemp; //累加

if(YMin>YAxisDegreeTemp) ?YMin=YAxisDegreeTemp; //求最小值
if(YMax<YAxisDegreeTemp) ?YMax=YAxisDegreeTemp; //求最大值
YSum += YAxisDegreeTemp; //累加

if(ZMin>ZAxisDegreeTemp) ?ZMin=ZAxisDegreeTemp; //求最小值
if(ZMax<ZAxisDegreeTemp) ?ZMax=ZAxisDegreeTemp; //求最大值
ZSum += ZAxisDegreeTemp; //累加

i++;
if(i>=10) ?//采樣10次求平均
{
XSum = XSum-XMax-XMin; ? ? // 去除極值
XAxisDegree=XSum/(i-2); ? ?// 求出平均AD值（因為去除了極值，所以次數(shù)要減2）
XSum=0;XMin=900;XMax=-900; // 變量復(fù)位，準備下一次計算

YSum = YSum-YMax-YMin;
YAxisDegree=YSum/(i-2);
YSum=0;YMin=900;YMax=-900;

ZSum = ZSum-ZMax-ZMin;
ZAxisDegree=ZSum/(i-2);
ZSum=0;ZMin=900;ZMax=-900;

i=0;
}
}