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Arduinoでレーダーを作ろう

https://blog.with2.net/link/?1965529

Arduinoでレーダーを作ろう

https://blog.with2.net/link/?1965529

Arduinoと測距センサで簡易的なレーダーを作ってみた。参考にしたのは以下のサイトです。

https://www.hackster.io/bharathrao64/ultrasonic-ranging-using-arduino-and-processing-radar-4091b4

この例では測距センサにはHC-SR04を使っていますが、今回は赤外線式のGP2Y0A21を使ってみます。ということで参考にしたスケッチのうちArduino側は改ざんしました。

以下に掲載しておきます。

#include <Servo.h>

int distance;
int duration;
Servo myServo;
void setup() {

Serial.begin(9600);
myServo.attach(9);
}
void loop() {
for(int i=15;i<=165;i++){
myServo.write(i);
delay(30);
distance = calculateDistance();
Serial.print(i);
Serial.print(“,”);
Serial.print(distance);
Serial.print(“.”);
}

for(int i=165;i>15;i–){
myServo.write(i);
delay(30);
distance = calculateDistance();
Serial.print(i);
Serial.print(“,”);
Serial.print(distance);
Serial.print(“.”);
}
}

int calculateDistance(){
duration = analogRead(A2);
delayMicroseconds(30);
distance = (6787/(duration-3))-4;
return distance;
}

Processig側はオリジナルそのままですが、使うCOMポート番号は変更する必要があります。

配線そのものは簡単なものです。

Arduino側を立ち上げた後で、Processingを起動します。表示が重なって見にくいのでオリジナルからフォントサイズ、位置を多少修正しています。

自律走行車に搭載してと考えてみましたが、測距センサの測定値をProcessing処理して疑似的に表現しているだけなのであまりメリットはなさそうです。ということでこんなものも出来るという話題提供です。

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