/// <summary>
/// 根据温度值算出电阻值。
/// </summary>
/// <param name="temperature">温度值</param>
/// <param name="rtdType">RTD类型(PT100/PT1000),该参数决定R0为100还是1000</param>
/// <returns></returns>
public static double ConvertTemperatureToResistance(double temperature, RTDType rtdType = RTDType.PT100)
{
double r0; //0℃时RTD的阻值
switch (rtdType)
{
case RTDType.PT100: r0 = 100; break;
case RTDType.PT1000: r0 = 1000; break;
default: r0 = 100; break;
}
if (temperature <= 0 && temperature >= MinTemperature)
{
return(r0 * (1 + A * temperature + B * Math.Pow(temperature, 2) + C * (temperature - r0) * Math.Pow(temperature, 3)));
}
else if (temperature > 0 && temperature <= MaxTemperature)
{
return(r0 * (1 + A * temperature + B * Math.Pow(temperature, 2)));
}
else
{
return(-1);
}
}
/// <summary>
/// 根据电阻值算出温度值。
/// </summary>
/// <param name="resistance">电阻值</param>
/// <param name="rtdType">RTD类型(PT100/PT1000),该参数决定R0为100还是1000</param>
/// <returns></returns>
public static double ConvertResistanceToTemperature(double resistance, RTDType rtdType = RTDType.PT100)
{
double normalizeFactor = 1; //使用RTTable前需对传入的resistance进行归一化，具体描述见RTTable的注释
switch (rtdType)
{
case RTDType.PT100: normalizeFactor = 100; break;
case RTDType.PT1000: normalizeFactor = 10; break;
default: normalizeFactor = 100; break;
}
//将电阻归一化到TRTable描述的R值上
int resistanceNormalized = (int)(resistance * normalizeFactor);
return(Interpolation.LinearInterpolation1D(TRTable, 1, MinTemperature, resistanceNormalized));
}
/// <summary>
/// Convert Voltage Value of RTD into Temperature Value
/// </summary>
/// <param name="temperature">Temperature Value Measured(the default unit is ℃)</param>
/// <param name="resValue">Resistance Value of RTD(Unit:Ohm)</param>
/// <returns></returns>
public static double Convert(double resValue, RTDType type)
{
return(RTD3851ValueConvertor.ConvertResistanceToTemperature(resValue, type));
}
/// <summary>
/// Convert Voltage Array of RTD into Temperature Array
/// </summary>
/// <param name="temperature">Temperature Array Measured(the default unit is ℃) </param>
/// <param name="resValues">Resistance Array of RTD(Unit:Ohm) </param>
/// <returns></returns>
public static double[] Convert(double[] resValues, RTDType type)
{
return(Array.ConvertAll(resValues, new Converter <double, double>(x => RTD3851ValueConvertor.ConvertResistanceToTemperature(x, type))));
}
