1) 利用 Arduino 的数字引脚给超声波传感器的 Trig 引脚至少 10 微秒的高电平信号,这会让HC-SR04 超声波测距模块发射出8个40K赫兹的超声波脉冲(ultrasonic burst)。 2) 8个超声波脉冲发出后,echo引脚会输出高电平。假如没有声波返回,echo引脚会在38微秒后输出低电平。假如有声波返回,echo引脚会进入低电平状态。
How to Filter Noise from Distance Measurements of Ultrasonic Sensor 如何过滤超声波传感器距离测量的噪声 The measurement result from ultrasonic sensor contains noise. In some application, the noised result causes the unwanted operation. We can remove noise by using the following algorithm: 超声波传感器的...
void setup(){ //Initialize Serial.begin(9600); //Serial: output result to Serial monitor pinMode(EchoPin, INPUT); //Set EchoPin as input, to receive measure result from US-025,US-026 pinMode(TrigPin, OUTPUT); //Set TrigPin as output, used to send high pusle to trig measurement (>...
int URTRIG = 5; // PWM trigger pin int sensorPin = A0; // select the input pin for the potentiometer int sensorValue = 0; // variable to store the value coming from the sensor unsigned int DistanceMeasured= 0; void setup() { //Serial initialization Serial.begin(9600); // Sets the...
Serial.println("Ultrasonic sensor:"); } voidloop(){ // 产生一个10us的高脉冲去触发TrigPin digitalWrite(TrigPin, LOW); delayMicroseconds(2); digitalWrite(TrigPin, HIGH); delayMicroseconds(10); digitalWrite(TrigPin, LOW); // 检测脉冲宽度,并计算出距离 ...
digitalWrite(URTRIG,HIGH); // Set to HIGH pinMode(URPWM, INPUT); // Sending Enable PWM mode command for(int i=0;i<4;i++) { Serial.write(EnPwmCmd[i]); } } void PWM_Mode() { // a low pull on pin COMP/TRIG triggering a sensor reading ...
distance = calculateDistance();// Calls a function for calculating the distance measured by the Ultrasonic sensor for each degree Serial.print(i); // Sends the current degree into the Serial Port Serial.print(“,”); // Sends addition character right next to the previous value needed later ...
Serial.println("Ultrasonic sensor:"); //设置声光引脚 pinMode(beepPin, OUTPUT); digitalWrite(beepPin, HIGH); pinMode(ledPin, OUTPUT); digitalWrite(ledPin, HIGH); } void loop() { // 产生一个10us的高脉冲去触发TrigPin digitalWrite(trigPin, LOW); ...
Serial.println("Ultrasonic sensor:"); } void loop(){ // 产生一个10us的高脉冲去触发TrigPin digitalWrite(TrigPin, LOW); delayMicroseconds(2); digitalWrite(TrigPin, HIGH); delayMicroseconds(10); digitalWrite(TrigPin, LOW); // 检测脉冲宽度,并计算出距离 ...
*/// 设定US-026连接的Arduino引脚constintTrigPin=3;constintEchoPin=2;floatdistance;voidsetup(){// 初始化串口通信及连接的引脚Serial.begin(9600);pinMode(TrigPin,OUTPUT);// 要检测引脚上输入的脉冲宽度,需要先设置为输入状态pinMode(EchoPin,INPUT);Serial.println("Ultrasonic sensor:");}voidloop(){/...