public Exhaust_Data Getdata_MQ411()
{
Exhaust_Data exhaust_data = new Exhaust_Data();
Random rd = new Random();
exhaust_data.HC = 0;
exhaust_data.CO = 0;
exhaust_data.NO = 0;
exhaust_data.CO2 = 0;
exhaust_data.λ = 0;
exhaust_data.HC = rd.Next(15, 30);
exhaust_data.CO = rd.Next(5, 10) / 10f;
exhaust_data.NO = rd.Next(15, 30);
exhaust_data.CO2 = rd.Next(5, 25) / 10f;
exhaust_data.λ = rd.Next(94, 113) / 100f;
return(exhaust_data);
}
/// <summary>
/// 获取实时数据 至少耗时500ms
/// </summary>
/// <returns>Exhaust_Data 如果值全为0则表明通讯失败</returns>
public Exhaust_Data GetData()
{
ReadData();
Exhaust_Data exhaust_data = new Exhaust_Data();
exhaust_data.CO2 = 0;
exhaust_data.CO = 0;
exhaust_data.HC = 0;
exhaust_data.NO = 0;
exhaust_data.O2 = 0;
exhaust_data.SD = 0;
exhaust_data.YW = 0;
exhaust_data.HJWD = 0;
exhaust_data.ZS = 0;
exhaust_data.QLYL = 0;
exhaust_data.λ = 0;
exhaust_data.HJYL = 0;
int i = 0;
byte[] Content = new byte[] { };
SendData(Cmd_GetData, Content);
Thread.Sleep(500);
while (!Read_Flag) //等待仪器返回
{
i++;
Thread.Sleep(10);
if (i == 100)
{
return(exhaust_data);
}
}
ReadData();
if (Read_Buffer[0] == 0x6 && Read_Buffer[1] == 0x60 && Read_Buffer[2] == 0x1B)
{
byte[] temp_byte = new byte[2];
temp_byte[0] = Read_Buffer[4];
temp_byte[1] = Read_Buffer[3];
exhaust_data.CO2 = BitConverter.ToInt16(temp_byte, 0) / 100f; //二氧化碳
temp_byte[0] = Read_Buffer[6];
temp_byte[1] = Read_Buffer[5];
exhaust_data.CO = BitConverter.ToInt16(temp_byte, 0) / 100f;; //一氧化碳
temp_byte[0] = Read_Buffer[8];
temp_byte[1] = Read_Buffer[9];
exhaust_data.HC = BitConverter.ToInt16(temp_byte, 0); //碳氢
temp_byte[0] = Read_Buffer[10];
temp_byte[1] = Read_Buffer[9];
exhaust_data.NO = BitConverter.ToInt16(temp_byte, 0); //一氧化氮
temp_byte[0] = Read_Buffer[12];
temp_byte[1] = Read_Buffer[11];
exhaust_data.O2 = BitConverter.ToInt16(temp_byte, 0) / 100f; //氧气
temp_byte[0] = Read_Buffer[14];
temp_byte[1] = Read_Buffer[13];
exhaust_data.SD = BitConverter.ToInt16(temp_byte, 0) / 10f; //湿度
temp_byte[0] = Read_Buffer[16];
temp_byte[1] = Read_Buffer[15];
exhaust_data.YW = BitConverter.ToInt16(temp_byte, 0) / 10f; //油温
temp_byte[0] = Read_Buffer[18];
temp_byte[1] = Read_Buffer[17];
exhaust_data.HJWD = BitConverter.ToInt16(temp_byte, 0) / 10f; //环境温度
temp_byte[0] = Read_Buffer[20];
temp_byte[1] = Read_Buffer[19];
exhaust_data.ZS = BitConverter.ToInt16(temp_byte, 0); //转速
temp_byte[0] = Read_Buffer[22];
temp_byte[1] = Read_Buffer[21];
exhaust_data.QLYL = BitConverter.ToInt16(temp_byte, 0) / 10f; //油路压力
temp_byte[0] = Read_Buffer[24];
temp_byte[1] = Read_Buffer[23];
exhaust_data.λ = BitConverter.ToInt16(temp_byte, 0) / 1000f; //燃空比λ
temp_byte[0] = Read_Buffer[26];
temp_byte[1] = Read_Buffer[25];
exhaust_data.HJYL = BitConverter.ToInt16(temp_byte, 0) / 10f; //环境压力 kpa
}
return(exhaust_data);
}