Single chip microcomputer + ultrasonic real-time distance measurement-EEWORLD

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This article talks about testing the distance through ultrasound and displaying the measured data in real time on LCD1602. When the measured distance is less than 10CM, the LED light will light up. This program has strong applicability and can be used for distance measurement, speed measurement, cleaning, welding, stone crushing, sterilization, etc. It has many applications in medicine, military, industry, and agriculture. It can sense when avoiding obstacles. The daily applications are: calculating the flow of people. Automatic water discharge when people come to the faucet, smart car obstacle avoidance, robot system, light sensing, etc. I just wanted to make a smart car recently, and it would be better to use it when the time comes. ^-^ Of course, sometimes other sensors such as infrared can be used instead. The following is an ultrasonic sensing experiment on lights.

The code I wrote:

Here is the code:

#include

LCD4Bit_mod lcd = LCD4Bit_mod(2);

int inputPin=15;

int outputPin=16;

int ledPin = 17;

void setup() {

pinMode(inputPin, INPUT);

pinMode(outputPin, OUTPUT);

pinMode(ledPin,OUTPUT);

lcd.init();

lcd.clear();

lcd.cursorTo(1, 0);

lcd.printIn("www.geeetech.com");

}

void display(int number,unsigned char address)

{

unsigned char a,b,c,d;

if(number <100)

digitalWrite(ledPin,LOW);

if(number >=100 )

digitalWrite(ledPin,HIGH);

a=(number/1000);

b=(number/100)%10;

c=(number/10)%10;

d=number%10;

lcd.commandWrite(0x80+address);

lcd.print(a+48);

lcd.print(b+48);

lcd.print(c+48);

lcd.print(46);

lcd.print(d+48);

lcd.print(99);

lcd.print(109);

}

void loop() {

digitalWrite(outputPin, LOW);

delayMicroseconds(2);

digitalWrite(outputPin, HIGH);

delayMicroseconds(10);

digitalWrite(outputPin, LOW);

float distance = pulseIn(inputPin, HIGH);

distance= distance/5.8;

lcd.cursorTo(2, 0);

lcd.printIn("Distance:");

display(distance,0x49);

}

Reference address：Single chip microcomputer + ultrasonic real-time distance measurement

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