sensorConfigData.h

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#ifndef SENSOR_CONFIG_DATA
#define SENSOR_CONFIG_DATA
 
struct sensorType
{
    int regression_method;
    double Rs_R0_ratio;
    double coefficient_a;
    double coefficient_b;
};
 
 
/*
      Exponential regression:
      Gas    | a      | b
      H2     | 987.99 | -2.162
      LPG    | 574.25 | -2.222
      CO     | 36974  | -3.109
      Alcohol| 3616.1 | -2.675
      Propane| 658.71 | -2.168
    */
const struct sensorType MQ2_config = {
    1, // Regression method type (a*ratio^b)
 
    9.83, // Rs/R0 in clean air
 
    // Coefficient values calculated (LPG)
    574.25, // a
 
    -2.222, // b
 
};
 
 
/*
  Exponential regression:
Gas    | a      | b
LPG    | 44771  | -3.245
CH4    | 2*10^31| 19.01
CO     | 521853 | -3.821
Alcohol| 0.3934 | -1.504
Benzene| 4.8387 | -2.68
Hexane | 7585.3 | -2.849
*/
const struct sensorType MQ3_config = {
    1, // Regression method type (a*ratio^b)
 
    60, // Rs/R0 in clean air
 
    // Coefficient values calculated (Alcohol)
    0.3934, // a
 
    -1.504, // b
 
};
 
 
/*
  Exponential regression:
Gas    | a      | b
LPG    | 3811.9 | -3.113
CH4    | 1012.7 | -2.786
CO     | 200000000000000 | -19.05
Alcohol| 60000000000 | -14.01
smoke  | 30000000 | -8.308
*/
const struct sensorType MQ4_config = {
    1, // Regression method type (a*ratio^b)
 
    4.4, // Rs/R0 in clean air
 
    // Coefficient values calculated (CH4)
    1012.7, // a
 
    -2.786, // b
 
};
 
 
/*
  Exponential regression:
Gas    | a      | b
LPG    | 80.897 | -2.431
CH4    | 177.65 | -2.56
CO     | 491204 | -5.826
H2     | 1163.8 | -3.874
alcohol| 97124  | -4.918
*/
const struct sensorType MQ5_config = {
    1, // Regression method type (a*ratio^b)
 
    6.5, // Rs/R0 in clean air
 
    // Coefficient values calculated (CH4)
    80.897, // a
 
    -2.431, // b
 
};
 
/*
  Exponential regression:
GAS     | a      | b
H2      | 88158  | -3.597
LPG     | 1009.2 | -2.35
CH4     | 2127.2 | -2.526
CO      | 1000000000000000 | -13.5
Alcohol | 50000000 | -6.017
*/
const struct sensorType MQ6_config = {
    1, // Regression method type (a*ratio^b)
 
    10, // Rs/R0 in clean air
 
    // Coefficient values calculated (LPG)
    1009.2, // a
 
    -2.35, // b
 
};
 
/*
  Exponential regression:
GAS     | a      | b
H2      | 69.014  | -1.374
LPG     | 700000000 | -7.703
CH4     | 60000000000000 | -10.54
CO      | 99.042 | -1.518
Alcohol | 40000000000000000 | -12.35
*/
const struct sensorType MQ7_config = {
    1, // Regression method type (a*ratio^b)
 
    27.5, // Rs/R0 in clean air
 
    // Coefficient values calculated (CO)
    99.042, // a
 
    -1.518, // b
 
};
 
 
/*
  Exponential regression for all gasses:
GAS     | a      | b
H2      | 976.97  | -0.688
LPG     | 10000000 | -3.123
CH4     | 80000000000000 | -6.666
CO      | 2000000000000000000 | -8.074
Alcohol | 76101 | -1.86
*/
const struct sensorType MQ8_config = {
    1, // Regression method type
 
    70, // Rs/R0 in clean air
 
    // Coefficient values calculated (H2)
    976.97, // a
 
    -0.688, // b
 
 
};
 
/*
  Exponential regression:
GAS     | a      | b
LPG     | 1000.5 | -2.186
CH4     | 4269.6 | -2.648
CO      | 599.65 | -2.244
*/
const struct sensorType MQ9_config = {
    1, // Regression method type
 
    9.6, // Rs/R0 in clean air
 
    // Coefficient values calculated (LPG)
    1000.5, // a
 
    -2.186, // b
 
 
};
 
 
/*
    Linear regression:
GAS     | a      | b
O3      | 0.41195 | -0.4708
*/
const struct sensorType MQ131_config = {
    0, // Regression method type
 
    1, // Rs/R0 in clean air
 
    // Coefficient values calculated (O3)
    0.41195, // a
 
    -0.4708, // b
 
 
};
 
/*
  Linear regression:
GAS      | a       | b
H2       | -0.5101   | 0.31988
NH3      | -0.47712  | 0.4491
Toulene  | -0.21779   | -0.23269
 
*/
const struct sensorType MQ135_config = {
    0, // Regression method type
 
    1, // Rs/R0 in clean air
 
    // Coefficient values calculated (NH3)
    -0.47712, // a
 
    0.4491, // b
 
 
};
 
/*
    Linear regression:
GAS     | a        | b
NH3     | -0.26406 | -0.24143
*/
const struct sensorType MQ137_config = {
    0, // Regression method type
 
    1, // Rs/R0 in clean air
 
    // Coefficient values calculated (NH3)
    -0.26406, // a
 
    -0.24143, // b
};
 
/*
    Linear regression:
GAS        | a        | b
Alcohol    | -0.46099 | 0.0681
Acetone    | -0.52356 | 0.49225
Toluene    | -0.4434  | 0.15397
*/
const struct sensorType MQ138_config = {
    0, // Regression method type
 
    1, // Rs/R0 in clean air
 
    // Coefficient values calculated (Toluene)
    -0.4434, // a
 
    0.15397, // b
};
 
// Used as the configuration for not yet supported sensors
const struct sensorType Blank_config = {
    0, // Regression method type
 
    0, // Rs/R0 in clean air
 
    // Coefficient values calculated
    0, // a
 
    0, // b
};
 
#endif