如何使用红外传感器来感知眼球运动并控制LED

　　在本项目中，我使用红外传感器来感知眼球运动并控制LED。

　　NeoPixelLED眼球

　　我使用了NeoPixelLED作为“眼球”部分。

　　LED用双面胶带固定在“碗”背上，并按以下顺序接线。

　　眼动追踪

　　原理图

　　传感器

　　我使用了两个传感器QTR-1A进行眼动追踪。QTR-1A放置在塑料片上，之间距离大约是双眼距离。

　　传感器部分和微控制器部分分别用夹子固定在眼镜上。

　　Arduino代码

　　当虹膜接近一个传感器时，反射光减少，传感器值增加。相反，当虹膜移开时，反射光增加，光反射器的传感器值减小。

　　LED眼球瞳孔的左右运动，感知一个传感器值的增减，并对其进行控制。

　　眨眼时，两个传感器值都会减小，所以如果两个传感器值同时减小，LED“眼球”的外壳部分就会往下掉。

　　#include

#include
#define NUM_SENSORS             2  // number of sensors used
#define NUM_SAMPLES_PER_SENSOR  10  // averaging
#define EMITTER_PIN             QTR_NO_EMITTER_PIN  
int iniSensorValL, sensorValL;
int iniSensorValR, sensorValR;
#define PIN A3
Adafruit_NeoPixel led = Adafruit_NeoPixel(68, PIN, NEO_GRB + NEO_KHZ800);
int blackNum = 24;
int pupilNum = 12;
uint32_t color;
int brightness = 40;
byte eyeColor;
int LR =7;
boolean lid = false;
int cnt = 0;
//Black eye L&R animation
int blackLED[15][24] = {{12,32,35,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       {12,13,31,36,54,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       {11,13,14,30,37,53,54,56,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       {10,11,14,15,29,38,52,53,56,57,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       { 9,10,11,12,15,16,28,33,34,39,51,52,55,56,57,58,68,68,68,68,68,68,68,68},
                       { 0, 8, 9,10,11,12,13,16,17,27,32,35,40,50,51,54,55,56,57,58,59,67,68,68},
                       { 0, 1, 7, 8, 9,10,13,14,17,18,26,31,36,41,49,50,53,54,57,58,59,60,66,67},
                       { 1, 2, 6, 7, 8, 9,14,15,18,19,25,30,37,42,48,49,52,53,58,59,60,61,65,66},
                       { 2, 3, 5, 6, 7, 8,15,16,19,20,24,29,38,43,47,48,51,52,59,60,61,62,64,65},
                       { 3, 4, 5, 6, 7,16,17,20,21,23,28,39,44,46,47,50,51,60,61,62,63,64,68,68},
                       { 4, 5, 6,17,18,21,22,27,40,45,46,49,50,61,62,63,68,68,68,68,68,68,68,68},
                       { 4, 5,18,19,26,41,48,49,62,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       { 4,19,20,25,42,47,48,63,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       {20,21,24,43,46,47,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                       {21,23,44,46,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68}};
//pupil L&R animation
int pupilLED[15][12] = {{33,34,68,68,68,68,68,68,68,68,68,68},
                       {32,33,34,35,68,68,68,68,68,68,68,68},
                       {12,31,32,33,34,35,36,55,68,68,68,68},
                       {12,13,30,31,32,33,34,35,36,37,54,55},
                       {13,14,29,30,31,32,35,36,37,38,53,54},
                       {14,15,28,29,30,31,36,37,38,39,52,53},
                       {15,16,27,28,29,30,37,38,39,40,51,52},
                       {16,17,26,27,28,29,38,39,40,41,50,51},
                       {17,18,25,26,27,28,39,40,41,42,49,50},
                       {18,19,24,25,26,27,40,41,42,43,48,49},
                       {19,20,23,24,25,26,41,42,43,44,47,48},
                       {20,21,22,23,24,25,42,43,44,45,46,47},
                       {21,22,23,24,43,44,45,46,68,68,68,68},
                       {22,23,44,45,68,68,68,68,68,68,68,68},
                       {22,45,68,68,68,68,68,68,68,68,68,68}};
//Blink animation
int eyelid = 0;
int eyelidNum[8] = {0,4,8,16,24,34,44,56};
int eyelidLED[56] = {64,65,66,67,58,59,60,61,56,57,62,63,49,50,51,52,47,48,53,54,38,39,40,41,46,55,36,37,42,43,26,27,28,29,35,44,24,25,30,31,15,16,17,18,34,45,23,32,13,14,19,20,6,7,8,9};
QTRSensorsAnalog qtra((unsigned char[]) {0, 1}, NUM_SENSORS, NUM_SAMPLES_PER_SENSOR, EMITTER_PIN);
unsigned int sensorValues[NUM_SENSORS];
void blink(int eyelid, int LR) {
 if (eyelid != 8){
   //Pewter
   for(uint16_t i=0; i      led.setPixelColor(i, led.Color(66, 66, 66));
   }
   //Black eye
   for(uint16_t i=0; i      led.setPixelColor(blackLED[LR][i], color);
   }
   //pupil
   for(uint16_t i=0; i      led.setPixelColor(pupilLED[LR][i], led.Color(0, 0, 66));
   }
   //eyelid
   for(int i=0; i < eyelidNum[eyelid]; i++) {
     led.setPixelColor(eyelidLED[i], 0);
   }
 } else if (eyelid == 8){
   led.clear();
 }
 led.show();
}
void setup() {
 Serial.begin(115200);
 led.begin();
 led.setBrightness(brightness); // Initial Brightness 40
 led.show(); // Initialize all pixels to 'off'
 color = led.Color(0, 177, 55); //pupil color
 delay(100);
 qtra.read(sensorValues);
 iniSensorValL = sensorValues[0];
 iniSensorValR = sensorValues[1];
 blink(eyelid, LR);
}
void loop() {
 //QTR - 1A sensor value
 qtra.read(sensorValues);
 sensorValL = sensorValues[0];
 sensorValR = sensorValues[1];
 double rasioL = (double)sensorValL / iniSensorValL;
 double rasioR = (double)sensorValR / iniSensorValR;
 Serial.print(rasioL);
 Serial.print("  ");
 Serial.println(rasioR);
 if(rasioL > 0.985 && rasioR < 0.985){ //right
   for(int i = LR; i < 12; i++){
     blink(0, i);
     delay(40);
     LR = i;
   }
 }else if(rasioL < 0.985 && rasioR > 0.985){ //left
   for(int i=LR; i>2; i--){
     blink(0, i);
     delay(40);
     LR = i;
   }
 }else if(lid == false && rasioL < 0.96 && rasioR < 0.96){ //Blinking close
   for(int i = 1; i < 9; i++){
     blink(i, LR);
     delay(40);
     lid = true;
   }
 }else if(lid == true && rasioL > 0.96 && rasioR > 0.96){ //Blinking open
   for(int i = 8; i > 0; i--){
     blink(i, LR);
     delay(40);
     lid = false;
   }
 }else if(lid == false && rasioL > 0.96 && rasioR > 0.96) {   //normal
   //cnt++;
   //eyelid = 0;
   if(LR <= 7){
     for(int i=LR; i<=7; i++){
       blink(0, i);
       delay(40);
       LR = i;
     }
   }else {
     for(int i=LR; i>=7; i--){
       blink(0, i);
       delay(40);
       LR = i;
     }
   }
   Serial.println("通常時");
 }
 //Initial value refresh
 if (cnt > 10){
   iniSensorValL = sensorValL;
   iniSensorValR = sensorValR;
   cnt = 0;
 }
}