美好的一天，我有以下代码用于我正在使用的超声波传感器，但结果不准确，我想以厘米为单位显示与目标的距离。
#include <LiquidCrystal.h> //Load Liquid Crystal Library
LiquidCrystal LCD(10, 9, 5, 4, 3, 2); //Create Liquid Crystal Object called LCD
int trigPin=13; //Sensor Trip pin connected to Arduino pin 13
int echoPin=11; //Sensor Echo pin connected to Arduino pin 11
int myCounter=0; //declare your variable myCounter and set to 0
int servoControlPin=6; //Servo control line is connected to pin 6
float pingTime; //time for ping to travel from sensor to target and return
float targetDistance; //Distance to Target in inches
float speedOfSound=776.5; //Speed of sound in miles per hour when temp is 77 degrees.
void setup() {
Serial.begin(9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
LCD.begin(16,2); //Tell Arduino to start your 16 column 2 row LCD
LCD.setCursor(0,0); //Set LCD cursor to upper left corner, column 0, row 0
LCD.print("Target Distance:"); //Print Message on First Row
}
void loop() {
digitalWrite(trigPin, LOW); //Set trigger pin low
delayMicroseconds(2000); //Let signal settle
digitalWrite(trigPin, HIGH); //Set trigPin high
delayMicroseconds(15); //Delay in high state
digitalWrite(trigPin, LOW); //ping has now been sent
delayMicroseconds(10); //Delay in high state
pingTime = pulseIn(echoPin, HIGH); //pingTime is presented in microceconds
pingTime=pingTime/1000000; //convert pingTime to seconds by dividing by 1000000 (microseconds in a second)
pingTime=pingTime/3600; //convert pingtime to hourse by dividing by 3600 (seconds in an hour)
targetDistance= speedOfSound * pingTime; //This will be in miles, since speed of sound was miles per hour
targetDistance=targetDistance/2; //Remember ping travels to target and back from target, so you must divide by 2 for actual target distance.
targetDistance= targetDistance*63360; //Convert miles to inches by multipling by 63360 (inches per mile)
LCD.setCursor(0,1); //Set cursor to first column of second row
LCD.print(" "); //Print blanks to clear the row
LCD.setCursor(0,1); //Set Cursor again to first column of second row
LCD.print(targetDistance); //Print measured distance
LCD.print(" inches"); //Print your units.
delay(250); //pause to let things settle
}
我将不胜感激。