Performance 根据频率值计算风速

我有NRG#40风速传感器，输出频率与风速成线性关系 输出信号范围从0 Hz到125 Hz 0 Hz平均值=0.35 m/s和125 Hz=96 m/s，传递函数为 米/秒=（赫兹x 0.765）+0.35 如何将此传感器与Arduino mega接口 之前我连接了Adafruit（产品ID:1733），它的输出电压不是频率与风速成线性关系 Adafruit的代码是：

 //Setup Variables

const int sensorPin = A0; //Defines the pin that the anemometer output is connected to
int sensorValue = 0; //Variable stores the value direct from the analog pin
float sensorVoltage = 0; //Variable that stores the voltage (in Volts) from the anemometer being sent to the analog pin
float windSpeed = 0; // Wind speed in meters per second (m/s)

float voltageConversionConstant = .004882814; //This constant maps the value provided from the analog read function, which ranges from 0 to 1023, to actual voltage, which ranges from 0V to 5V
int sensorDelay = 1000; //Delay between sensor readings, measured in milliseconds (ms)

//Anemometer Technical Variables
//The following variables correspond to the anemometer sold by Adafruit, but could be modified to fit other anemometers.

float voltageMin = .4; // Mininum output voltage from anemometer in mV.
float windSpeedMin = 0; // Wind speed in meters/sec corresponding to minimum voltage

float voltageMax = 2.0; // Maximum output voltage from anemometer in mV.
float windSpeedMax = 32; // Wind speed in meters/sec corresponding to maximum voltage



void setup() 
{              
  Serial.begin(9600);  //Start the serial connection
}


void loop() 
{
sensorValue = analogRead(sensorPin); //Get a value between 0 and 1023 from the analog pin connected to the anemometer

sensorVoltage = sensorValue * voltageConversionConstant; //Convert sensor value to actual voltage

//Convert voltage value to wind speed using range of max and min voltages and wind speed for the anemometer
if (sensorVoltage <= voltageMin){
 windSpeed = 0; //Check if voltage is below minimum value. If so, set wind speed to zero.
}else {
  windSpeed = (sensorVoltage - voltageMin)*windSpeedMax/(voltageMax - voltageMin); //For voltages above minimum value, use the linear relationship to calculate wind speed.
}

 //Print voltage and windspeed to serial
  Serial.print("Voltage: ");
  Serial.print(sensorVoltage);
  Serial.print("\t"); 
  Serial.print("Wind speed: ");
  Serial.println(windSpeed); 

 delay(sensorDelay);
}

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如果使用Arduino UNO或Nano，一种简单的方法是将传感器连接到引脚D2或D3，该引脚可用作中断引脚。 然后创建一个函数或ISR，每次传感器脉冲时都会调用该函数。然后将新创建的函数连接到中断引脚。 所以它看起来像这样

byte sensorPin = 2;
double pulses = 0;
double wSpeed = 0;
long updateTimer = 0;
int updateDuration = 3000;

void setup() {
  Serial.begin(115200);
  pinMode(sensorPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(sensorPin), sensorISR, FALLING);
}

void loop() {
  long now = millis();
  if(updateTimer < now) {
    updateTimer = now + updateDuration;
    wSpeed = ((pulses/(updateDuration/1000)) * 0.765) + 0.35;
    pulses = 0;
    Serial.println("Windspeed is:" + String(wSpeed));
  }
}

void sensorISR() {
  pulses++;
}

字节传感器pin=2；
双脉冲=0；
双wSpeed=0；
长UpdateTime=0；
int updateDuration=3000；
无效设置（）{
序列号开始（115200）；
引脚模式（传感器引脚、输入\上拉）；
连接中断（数字插针中断（传感器插针）、传感器ISR、下降）；
}
void循环（）{
long now=millis（）；
if（updateTimer

ISR功能的唯一任务是为每个脉冲增加脉冲变量。然后每秒钟你就可以计算出频率和速度。如果你像上面那样等3秒钟，你会有一个更好的分辨率，但是你必须在等式中考虑额外的时间

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我没有测试这个代码。

谢谢你，先生，实际上我需要记录每10分钟的平均风速0 HZ=0.365 m/s 125 HZ=96 m/s根据这个方程计算的其他风速m/s=（HZ x 0.765）+0.35信号类型是方波arduino的类型是arduino mega代码在mega上也应该有效。您可以将“updateDuration”变量更改为键入“long”而不是“int”，并将值更改为600000以获得过去10分钟的平均值