传感器

耳夹式心率传感器

控制部分

Geduino UNO

转接板

Base shield

执行机构

电机 6V

ws2812灯条

工作过程

Arduino上电后先执行校准程序，显示开机信号（彩虹慢速流动效果）

然后开始执行校准过程，累计20心跳间隔，计算出佩戴者的标准心跳。

绿色短闪一次后校准完毕。

开始监测佩戴者的心跳，如果心跳超过阈值，控制电机转动并显示彩虹快速流动。

校准和监测过程每次心跳都会触发一次红色短闪

更新下代码部分吧

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define STRIP_PIN 6


#define MODE_CALIBRATION 0
#define MODE_CALCULATE 1

const int time_max = 2000;//you can change it follow your system's request.


int mode = 0;

int MRRIGHT_THRESHOLD = 600;




Adafruit_NeoPixel strip = Adafruit_NeoPixel(10, STRIP_PIN, NEO_GRB + NEO_KHZ800);

unsigned long data[4];
int tail = 0;
bool succeed = true;
unsigned long time_taking;
int BPM = 0;


unsigned long data_init[21];
int data_init_tail = 0;



void setup() {

  strip.begin();
  strip.setBrightness(30);
  strip.show(); // Initialize all pixels to 'off'


 


  pinMode(8, OUTPUT);
  pinMode(7, OUTPUT);
  digitalWrite(8, LOW);
  digitalWrite(7, LOW);

  Serial.begin(9600);

  digitalWrite(8, HIGH);
  delay(1000);

  digitalWrite(8, LOW);
  


  uint16_t i, j;

  for(j=0; j<256*3; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(10);
    
  }

  
  Serial.println("begin measure!");
  attachInterrupt(digitalPinToInterrupt(2), heartBeat, RISING);

  
}

void loop() {
  // Some example procedures showing how to display to the pixels:
  

}



void MrRightLIGHT() {
  detachInterrupt(digitalPinToInterrupt(2));
  uint16_t i, j;

  for(j=0; j<256*3; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delayMicroseconds(1000);
    
  }

  attachInterrupt(digitalPinToInterrupt(2), heartBeat, RISING);

  
}

void colorWipe(uint32_t c, uint8_t wait) {
  

  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
    strip.show();
    delay(wait);
  }
  
}

void colorWipeShort(int num){
  for(int i=0; i< num; i++){
      strip.setPixelColor(i, strip.Color(255,0,0));
      strip.show();
  }


}


// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}


void MrRight(){

    digitalWrite(7, HIGH);
    MrRightLIGHT();
    delay(5000);
    digitalWrite(7,LOW);
      
  

  succeed = true;



}




void heartBeatLight(unsigned long time_take){
  colorWipe(strip.Color(0,0,0),0);
  colorWipeShort(map(time_take, MRRIGHT_THRESHOLD, MRRIGHT_THRESHOLD+100, 10, 1));
  delay(10);


}


void heartBeat(){
  if(mode == MODE_CALCULATE){
      
  
      data[tail] = millis();
      Serial.println(tail,DEC);

      if(tail == 0){
        time_taking = data[tail] - data[3];
        Serial.println(time_taking);

          
      }else{
        time_taking = data[tail] - data[tail - 1];
        Serial.println(time_taking);
      }

      if(time_taking > time_max){
          succeed = 0;
          Serial.println("Heart rate measure error,test will restart!" );
          for(unsigned char i=0;i < 4;i ++)
          {
            data[i]=0;
          }
          data[3]=millis();
      }

      if(succeed){
        heartBeatLight(time_taking);
        if(tail >= 3){
          tail = 0;
          Serial.print("heart rate is : ");
          Serial.println(180000/(data[3]-data[0]));
          if((data[1]-data[0] < MRRIGHT_THRESHOLD)&&(data[2]-data[1] < MRRIGHT_THRESHOLD)&&(data[3]-data[2] < MRRIGHT_THRESHOLD)){
            MrRight();
            
              
          }


            
        }else{
          tail++;
          
        }

          
      }else{
        tail = 0;
        succeed = 1;

      }
    }else{
      Serial.print("calibrating now, step ");
      Serial.println(data_init_tail);

      data_init[data_init_tail] = millis();
      data_init_tail++;

      colorWipe(strip.Color(255,0,0),10);
      colorWipe(strip.Color(0,0,0),0);
      delay(10);



      if(data_init_tail >= 21){
        for(int i=0; i<20; i++){
            data_init[i] = data_init[i+1]-data_init[i];

        }

        for(int i=0; i<20; i++){
          for(int j=i+1; j<=20; j++){
            if(data_init[i] > data_init[j]){
                data_init[i] = data_init[i] ^ data_init[j];
                data_init[j] = data_init[i] ^ data_init[j];
                data_init[i] = data_init[i] ^ data_init[j];

            }
              
          }
        }

        Serial.print("data_init = ");
        for(int i=0; i<21; i++){
          Serial.print(data_init[i]);
          Serial.print(",");

            
        }
        Serial.println();


        
        
        MRRIGHT_THRESHOLD = (data_init[5]+data_init[4]+data_init[3]) / 3 - 50;
        Serial.print("Threhold is : ");
        Serial.println(MRRIGHT_THRESHOLD);
        mode = MODE_CALCULATE;

        colorWipe(strip.Color(0,255,0),10);
        colorWipe(strip.Color(0,0,0),0);

      }















    }



}