ardunio 实验：超声波测距、声光报警模拟倒车雷达

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我是靠谱客的博主陶醉冥王星，这篇文章主要介绍ardunio 实验：超声波测距、声光报警模拟倒车雷达，现在分享给大家，希望可以做个参考。

所用元件：

1、Arduino 2012 UNO R3开发板
2、超声波模块：HC-SR04
3、LED 蜂鸣器

功能：

输出测距信息至串口
距离20CM 蜂鸣器开始报警，LED闪烁
20CM 到 3CM 间报警音不断急促，3CM内报警音长鸣，LED长亮

代码：

复制代码

1 int beeppin = 8;
 2 int ledpin=9;
 3 int echo= 6;
 4 int trig=7;
 5 unsigned long time_echo=0; // record the pulse width by sensor returns
 6 unsigned long distance =0; // record the distance value;
 7
 8 void setup(){
 9
Serial.begin(9600);
10 
pinMode(beeppin,OUTPUT);
11 
pinMode(ledpin,OUTPUT);
12 
pinMode(echo,INPUT);
13 
pinMode(trig,OUTPUT);
14 }
15
16 void loop(){
17
digitalWrite(trig,HIGH);
//send pulse
18
delayMicroseconds(80);
//set pulse width with 50us(>10us)
19
digitalWrite(trig,LOW);
//stop send
20
21
time_echo = pulseIn(echo,HIGH); //get return pulse width
22
if((time_echo<60000)&&(time_echo>1)) //valid scope 1-60000
23 
{
24
distance = (time_echo*34/100)/2; //mm

25
if(distance < 200)
26 
{
27
if(distance<30){
28 
digitalWrite(beeppin,HIGH);
29 
digitalWrite(ledpin,HIGH);
30
}else{
31
alert(distance/2);
32 
}
33 
}
34 
Serial.print(distance,DEC);
35
Serial.println('n');
36
37 
}
38
delay(100);
39 }
40 void alert(unsigned i){
41 
digitalWrite(beeppin,HIGH);
42 
digitalWrite(ledpin,HIGH);
43 
delay(i);
44 
digitalWrite(beeppin,LOW);
45 
digitalWrite(ledpin,LOW);
46 
delay(i);
47 }

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 1 int beeppin = 8;
 2 int ledpin=9;
 3 int echo= 6;
 4 int trig=7;
 5 unsigned long time_echo=0; // record the pulse width by sensor returns
 6 unsigned long distance =0; // record the distance value;
 7
 8 void setup(){
 9
Serial.begin(9600);
10 
pinMode(beeppin,OUTPUT);
11 
pinMode(ledpin,OUTPUT);
12 
pinMode(echo,INPUT);
13 
pinMode(trig,OUTPUT);
14 }
15
16 void loop(){
17
digitalWrite(trig,HIGH);
//send pulse
18
delayMicroseconds(80);
//set pulse width with 50us(>10us)
19
digitalWrite(trig,LOW);
//stop send
20
21
time_echo = pulseIn(echo,HIGH); //get return pulse width
22
if((time_echo<60000)&&(time_echo>1)) //valid scope 1-60000
23 
{
24
distance = (time_echo*34/100)/2; //mm

25
if(distance < 200)
26 
{
27
if(distance<30){
28 
digitalWrite(beeppin,HIGH);
29 
digitalWrite(ledpin,HIGH);
30
}else{
31
alert(distance/2);
32 
}
33 
}
34 
Serial.print(distance,DEC);
35
Serial.println('n');
36
37 
}
38
delay(100);
39 }
40 void alert(unsigned i){
41 
digitalWrite(beeppin,HIGH);
42 
digitalWrite(ledpin,HIGH);
43 
delay(i);
44 
digitalWrite(beeppin,LOW);
45 
digitalWrite(ledpin,LOW);
46 
delay(i);
47 }