问基于Arduino的超声波传感器程序，输出高控制电机。

EN

const int TriggerPin = 8;  //sensor trigger pin
const int EchoPin = 9;    //sensor echo pin
const int MotorPin = 7;  //motor out pin
long Duration = 0;

void setup(){
  pinMode(TriggerPin,OUTPUT);  //sets trigger as output
  pinMode(EchoPin,INPUT);      //sets echo as input
  pinMode(MotorPin,OUTPUT);    //sets motor as output
  Serial.begin(9600);          //displays to serial monitor 
}

void loop(){
 digitalWrite(TriggerPin,LOW);  //trigger pin to 0V
 delayMicroseconds(2);          //waits 2 us
 digitalWrite(TriggerPin,HIGH); //trigger pin to 5V
 delayMicroseconds(10);         //10 us delay to recieve ping
 digitalWrite(TriggerPin,LOW);

Duration = pulseIn(EchoPin,HIGH);  //waits for echo pin to get high
//pulseIn returns the Duration in microseconds 
long Distance_mm = Distance(Duration);  //uses function to calc. distance

delay(100);  //delay half second, do next measurement
}

long Distance(long time);
{

long DistanceCalc;  //calculation variable
DistanceCalc = ((time /2.9) / 2);

//want to average this DistanceCalc reading over 10 readings, then use this value to    compare to the desired range

void loop(){
  if  (dist_avg < 600 && dist_avg > 400);
  digitalWrite(MotorPin,HIGH);
  else
  digitalWrite(MotorPin,LOW);
}
//if average distance is within .4-.6 meter range, output HIGH; turns motor on
//if avergae distance is outside .4-.6 meter range, outut LOW; turns motor off