采用51單片機為主控電路，傳感器用光電管，電路設(shè)計含轉(zhuǎn)速采樣電路。數(shù)碼管采用4位一體共陰數(shù)碼管。下載地址：
單片機轉(zhuǎn)速測量程序與仿真.rar
(153.78 KB, 下載次數(shù): 78)
2018-12-30 07:56 上傳
點擊文件名下載附件
轉(zhuǎn)速測量 下載積分: 黑幣 -5
轉(zhuǎn)速測量.jpg (100.06 KB, 下載次數(shù): 58)
下載附件
轉(zhuǎn)速仿真
2018-12-30 07:55 上傳
部分源程序：（完整程序請自己下載）
#include <REG52.H>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
#define LED_DAT P0
sbit LED_SEG0 = P2^7;
sbit LED_SEG1 = P2^6;
sbit LED_SEG2 = P2^5;
sbit LED_SEG3 = P2^4;
sbit pin_SpeedSenser = P3^5; //光電傳感器信號接在T1上
#define TIME_CYLC 200 //12M晶振，定時器5ms 中斷一次 我們1秒計算一次轉(zhuǎn)速 // 1000ms/5ms = 200
#define PLUS_PER 1 //碼盤的齒數(shù) ，這里假定碼盤上有10個齒，即傳感器檢測到10個脈沖，認為1圈
#define K 100.0 //校準系數(shù)
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar data Disbuf[4]; // 顯示緩沖區(qū)
uint Tcounter = 0,speed,PlusCounter; //時間計數(shù)器
bit Flag_Fresh = 0; // 刷新標志
bit Flag_clac = 0; //計算轉(zhuǎn)速標志
bit Flag_Err = 0; //超量程標志 //在數(shù)碼管上顯示一個四位數(shù)
void DisplayFresh(); //計算轉(zhuǎn)速，并把結(jié)果放入數(shù)碼管緩沖區(qū)
void ClacSpeed(); //初始化定時器T0
void init_timer0(); //初始化定時器T1
void init_timer1(); //延時函數(shù)
void Delay(uint ms);
void it_timer0() interrupt 1
{
TF0 = 0; //d定時器 T0用于數(shù)碼管的動態(tài)刷新
TH0 = 0xEC;
TL0 = 0xA8; //78
Tcounter++;
if(Tcounter>TIME_CYLC)
{
PlusCounter = TH1*256 + TL1;
TH1=TL1 = 0x00;//脈沖計數(shù)清零
Tcounter = 0;//周期定時 清零
speed =60*PlusCounter/PLUS_PER;//
Flag_clac = 1; //周期到，該重新計算轉(zhuǎn)速了
}
Flag_Fresh = 1;
}
void main(void)
{
Disbuf[0] = 0; //開機時，初始化為0000
Disbuf[1] = 0;
Disbuf[2] = 0;
Disbuf[3] = 0;
init_timer0();
init_timer1();
while(1)
{
if(Flag_Fresh)
{
Flag_Fresh = 0;
DisplayFresh(); // 定時刷新數(shù)碼管顯示
}
if(Flag_clac)
{
Flag_clac = 0;
ClacSpeed(); //計算轉(zhuǎn)速，并把結(jié)果放入數(shù)碼管緩沖區(qū)
}
if(speed>9999) //超量程處理//數(shù)碼管顯示字母'EEEE'
{
Disbuf[0] = 0x9e; //開機時，初始化為0000
Disbuf[1] = 0x9e;
Disbuf[2] = 0x9e;
Disbuf[3] = 0x9e;
}
}
}
//在數(shù)碼管上顯示一個四位數(shù)
void DisplayFresh()
{
LED_DAT =~table[Disbuf[0]];
LED_SEG3 = 1;
Delay(10);
LED_SEG3 = 0;
Delay(3);
LED_DAT =~table[Disbuf[1]];
LED_SEG2 = 1;
Delay(10);
LED_SEG2 = 0;
Delay(3);
LED_DAT =~table[Disbuf[2]];
LED_SEG1 = 1;
Delay(10);
LED_SEG1 = 0;
Delay(3);
LED_DAT =~table[Disbuf[3]];
LED_SEG0 = 1;
Delay(10);
LED_SEG0 = 0;
Delay(3);
}
//計算轉(zhuǎn)速，并把結(jié)果放入數(shù)碼管緩沖區(qū)
void ClacSpeed()
{
Disbuf[0] = (speed/1000)%10;
Disbuf[1] = (speed/100)%10;
Disbuf[2] = (speed/10)%10;
Disbuf[3] = speed%10;
}
//初始化定時器T0
void init_timer0()
{
TMOD &= 0xf0; //定時10毫秒
TMOD |= 0x01;
TH0 = 0xC0;
TL0 = 0x00;
ET0=1;
EA=1;
TR0=1;
}
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