蓋格計數器/輻射/Geiger counter

[蓋格計數器腳位]

GND --> arduino GND

5V --> arduino 5V

VIN --> arduino pin2

[材料]

Arduino主板 x 1

科州Cajoe 蓋格計數器 RadiationD-v1.1 x 1

程式碼1 (數據顯示在電腦上)


#include <SPI.h>
#define LOG_PERIOD 30000  //Logging period in milliseconds, recommended value 15000-60000.
#define MAX_PERIOD 60000  //Maximum logging period without modifying this sketch

float counts;     //variable for GM Tube events
float cpm;        //variable for CPM
float multiplier;  //variable for calculation CPM in this sketch
float previousMillis;  //variable for time measurement
float usv ;     

void tube_impulse(){       //subprocedure for capturing events from Geiger Kit
  counts++;
}

void setup(){
  counts = 0;
  cpm = 0;
  Serial.begin(9600);
  attachInterrupt(0, tube_impulse, FALLING);
  Serial.println("Human exposure to natural background radiation (global average) = 0.274µSv/h");
}

void loop(){
  unsigned long currentMillis = millis();
  if(currentMillis - previousMillis > LOG_PERIOD){
    multiplier = MAX_PERIOD / (currentMillis - previousMillis);      //calculating multiplier, depend on your log period
    cpm = counts * multiplier;
    usv = cpm / 151;    // 151CPM=1uSv/h for M4011 GM Tube。
    Serial.println("Radiation= " + String(cpm) + " CPM(counts per minute)   = " + String(usv) + " µSv/h (微西弗/小時)");
    previousMillis = currentMillis;
    counts = 0;
  }
}

程式碼2 (透過wifi上傳至ThingSpeak)


#include <SoftwareSerial.h>
SoftwareSerial esp8266(10,11); 

#include <SPI.h>
#define LOG_PERIOD 30000  //Logging period in milliseconds, recommended value 15000-60000.
#define MAX_PERIOD 60000  //Maximum logging period without modifying this sketch

float counts;     //variable for GM Tube events
float cpm;        //variable for CPM
float multiplier;  //variable for calculation CPM in this sketch
float previousMillis;  //variable for time measurement
float usv ;  

String apiKey = ""; 
String ssid = ""; 
String password = "";
boolean DEBUG = true;

void tube_impulse(){       //subprocedure for capturing events from Geiger Kit
  counts++;
}

void showResponse(int waitTime){
    long t=millis();
    char c;
    while (t+waitTime>millis()){
      if (esp8266.available()){
        c=esp8266.read();
        if (DEBUG) Serial.print(c);
      }
    }        
}

boolean thingSpeakWrite(float value1){
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += "184.106.153.149";
  cmd += "\",80";
  esp8266.println(cmd);
  if (DEBUG) Serial.println(cmd);
  if(esp8266.find("Error")){
    if (DEBUG) Serial.println("AT+CIPSTART error");
    return false;
  }

  String getStr = "GET /update?api_key="; 

  getStr +="&field1=";
  getStr += String(value1);
  getStr += "\r\n\r\n";
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  esp8266.println(cmd);
  if (DEBUG)  Serial.println(cmd);
  delay(100);
  if(esp8266.find(">")){
    esp8266.print(getStr);
    if (DEBUG)  Serial.print(getStr);
  }
  else{
    esp8266.println("AT+CIPCLOSE");
    if (DEBUG)   Serial.println("AT+CIPCLOSE");
    return false;
  }
  return true;
}


void setup() {
  DEBUG=true; 
  Serial.begin(9600); 
  Serial.println("Arduino...OK");
 
  counts = 0;
  cpm = 0;
  attachInterrupt(0, tube_impulse, FALLING); //define external interrupts 
 
  esp8266.begin(115200);
  esp8266.write("AT+UART_DEF=9600,8,1,0,0\r\n");
  delay(1500);
  esp8266.begin(9600);
  Serial.println("ESP8266...OK");
  esp8266.println("AT+CWMODE=1");
  showResponse(1000);  
  esp8266.println("AT+CWJAP=\""+ssid+"\",\""+password+"\""); 
  showResponse(10000);
  if (DEBUG)  Serial.println("Setup completed");
}


void loop() {
  unsigned long currentMillis = millis();
  if(currentMillis - previousMillis > LOG_PERIOD){
    multiplier = MAX_PERIOD / (currentMillis - previousMillis);      //calculating multiplier, depend on your log period
    cpm = counts * multiplier;
    usv = cpm / 151;    // 151CPM=1uSv/h for M4011 GM Tube。
    Serial.println("Radiation= " + String(cpm) + " CPM(counts per minute)   = " + String(usv) + " µSv/h (微西弗/小時)");

    thingSpeakWrite(usv); 

    previousMillis = currentMillis;
    counts = 0;
  }
}


參考網站：

日本地區輻射1：http://safecast.org/tilemap/

日本地區輻射2：http://jciv.iidj.net/map/

行政院原子能委員會，輻射劑量比較圖：https://www.aec.gov.tw/index--5_40_873.html