Arduino红外传感器-Sharp GP2Y0A02YK 红外测距传感器 (20~150cm)

外观

简介

• GP2Y0A02YK是夏普红外距离传感器家族成员之一，此型号可提供高达150cm的探测距离，同样也拥有夏普在红外距离探测领域一贯的品质。
• 此传感器可以用于机器人的测距、避障以及高级的路径规划，是机器视觉及其应用领域的不错选择。

技术规格

• 信号类型：模拟输出
• 探测距离：20-150cm
• 工作电压：4.5-5.5V
• 标准电流消耗：30 mA
• 接口类型：PH2.0-3P
• 最大尺寸：40x22x20 mm

连接图

分析图

模拟输出电压与反射物体的距离

Sharp GP2Y0A02YK1

Sharp GP2Y0A02YK2

示例代码

• 方案一

/*  description:  
    The sample code is used to measure distance by GP2Y0A02YK IR ranger sensor.  
    VCC -- VCC  
    GND -- GND  
    Signal -- Analog 1    
    */ 
int IRpin = 1;                                    // analog pin for reading the IR sensor 
void setup() {
    Serial.begin(9600);                             // start the serial port
} 
void loop() {
    float volts = analogRead(IRpin)*0.0048828125;   // value from sensor * (5/1024) - if running 3.3.volts then change 5 to 3.3
    float distance = 65*pow(volts, -1.10);          // worked out from graph 65 = theretical distance / (1/Volts)  
    Serial.println(distance);                       // print the distance  
    delay(100);                                     // arbitary wait time.
}

• 方案二

/******** start code ********/
/*
 *  created     2013-07-26
 *  by      lisper (leyapin@gmail.com)
 *  function    test gp2y0a02yk, read value from A1
 *
 */

//connect gp2y0a02 to A1
#define pin A1

void setup () {
        Serial.begin (9600);
        pinMode (pin, INPUT);
}

void loop () {
        uint16_t value = analogRead (pin);
        uint16_t range = get_gp2y0a02 (value);
        Serial.println (value);
        Serial.print (range);
        Serial.println (" cm");
        Serial.println ();
        delay (500);
}

//return distance (cm)
uint16_t get_gp2y0a02 (uint16_t value) {
        if (value < 70)  value = 70;
        return 12777.3/value-1.1;        //(cm)
        //return (62.5/(value/1023.0*5)-1.1);        //(cm)
        //return ((67870.0 / (value - 3.0)) - 40.0); //gp2d12 (mm)
}

/******** end code ********/

本文整理于DFRobot wiki