Mise à jour de la bibliothèque permettant de mesurer la température

lib/MeasureUnit/MeasureUnit.cpp

@@ -9,7 +9,7 @@ AdcSetting adcSetting) : _analogInput(analogInput), _thermistorCount(thermistorC
   //Allocation dynamique des différent tableaux
   _temperatures = (double*) calloc(_thermistorCount, sizeof(double));
   _rOffsetMap = (double*) calloc(_thermistorCount, sizeof(double));
-  _resistanceMap = (double*) calloc(_thermistorCount, sizeof(double));
+  _resistanceMap = (double*) malloc(_thermistorCount * sizeof(double));
 
   if(_temperatures == NULL || _rOffsetMap == NULL || _resistanceMap == NULL)
   {
@@ -39,18 +39,18 @@ MeasureUnit::~MeasureUnit()
  */
 double *MeasureUnit::getTemperatures()
 {
-  double courant(0), deltaTension(0);
+  double courant(0), rPrecTension(0);
   //1) Nous calculons le courant présent dans la branche grace à la résistance de précision
   #ifdef DEBUG
   Serial.println("-------------");
   #endif
   
-  for(int i(0); i < _adcSetting.getMeasureIteration(); i++)
+  for(int i(0); i < /*_adcSetting.getMeasureIteration()*/2500; i++)
   {
-    delay(_adcSetting.getDelayBetweenIteration());
+    delay(/*_adcSetting.getDelayBetweenIteration()*/2);
     
-    int sample = analogRead(_analogInput[0]);
-    deltaTension += sample;
+    unsigned int sample = analogRead(_analogInput[0]);
+    rPrecTension += sample;
     
     #ifdef DEBUG
     Serial.print("Adc value : ");Serial.println(sample);
@@ -61,55 +61,85 @@ double *MeasureUnit::getTemperatures()
   Serial.println("-------------");
   #endif
 
-  deltaTension /= _adcSetting.getMeasureIteration();
+  rPrecTension /= 2500;//_adcSetting.getMeasureIteration();
   #ifdef DEBUG
-  Serial.print("Adc value average : ");Serial.println(deltaTension);
+  Serial.print("Adc value average : ");Serial.println(rPrecTension);
   #endif
-  deltaTension *= _adcSetting.getQuantum();
+  rPrecTension *= _adcSetting.getQuantum();
   #ifdef DEBUG
   char buffer[10] = "";
-  sprintf(buffer,"%.8f", deltaTension);
+  sprintf(buffer,"%.8f", rPrecTension);
   Serial.print("R prec voltage : ");Serial.println(buffer);
   #endif
-  courant = deltaTension / (double) _precResistor;
-  #ifdef DEBUG
+  courant = rPrecTension / (double) _precResistor;
+  //#ifdef DEBUG
+  char buffer[10] = "";
   sprintf(buffer,"%.8f", courant);
   Serial.print("R prec current : ");Serial.println(buffer);
-  #endif
+  //#endif
   
   
   //2) Nous calculons le delta de tensions pour chaque thermistances
   for(int i(1); i < _thermistorCount; i++)
   {
+    _resistanceMap[i-1] = 0;
+    
     for(int j(0); j < _adcSetting.getMeasureIteration(); j++)
     {
       delay(_adcSetting.getDelayBetweenIteration());
       
       int sample = analogRead(_analogInput[i]);
+      
       _resistanceMap[i-1] += sample;
     }
+    
     _resistanceMap[i-1] /= _adcSetting.getMeasureIteration();
-    if(i == 1)
-      _resistanceMap[i-1] -= deltaTension;
+    
+    _resistanceMap[i-1] *= _adcSetting.getQuantum();
+    
+    /*if(i == 1)
+      _resistanceMap[i-1] -= rPrecTension;
     else
-      _resistanceMap[i-1] -= _resistanceMap[i-2];
-  }
+      _resistanceMap[i-1] -= _resistanceMap[i-2];*/
 
-  //Pour la dernière valeur:
-  _resistanceMap[7] = _adcSetting.getVref() - _resistanceMap[6];
+    /*#ifdef DEBUG
+    Serial.print("Debug voltage delta : ");Serial.println(_resistanceMap[i-1]);
+    #endif*/
+  }
+  _resistanceMap[7] = _adcSetting.getVref();
   
+  for(int i(_thermistorCount-1); i > 0; i--)
+  {
+    #ifdef DEBUG
+    Serial.print("Debug voltage level ");Serial.print(i);Serial.print(" : ");Serial.println(_resistanceMap[i]);
+    #endif
+    //Calcule de delta :
+    _resistanceMap[i] -= _resistanceMap[i-1];
+    #ifdef DEBUG
+    Serial.print("Debug voltage delta : ");Serial.println(_resistanceMap[i]);
+    #endif
+  }
   
   for(int i(0); i < _thermistorCount; i++)
   {
     //3) Nous en déduisons la résistance
     _resistanceMap[i] /= courant;
     //4) Nous en déduisons la temperature
-    _temperatures[i] = (((25.0+273.15) * (double)_thermistorSetting.getBeta()) / ((double)_thermistorSetting.getBeta() + (25.0+273.15)*log(_resistanceMap[i]/(double) _thermistorSetting.getRat25()))) - 273.15;
+    _temperatures[i] = computeTemperature(_thermistorSetting.getBeta(), _resistanceMap[i], _thermistorSetting.getRat25());
+    _temperatures[i] += _rOffsetMap[i] + _globalOffset;
+    #ifdef DEBUG_TEMP
+    Serial.print("Temperature ");Serial.print(i);Serial.print(" : ");Serial.println(_temperatures[i]);
+    #endif
   }
   
   return _temperatures;
 }
 
+double MeasureUnit::computeTemperature(double beta, double resistance, double rAt25)
+{
+  return (((25.0+273.15) * beta) / (beta + (25.0+273.15)*log(resistance / rAt25))) - 273.15;
+}
+
 void MeasureUnit::setGlobalTempOffset(double offset)
 {
   _globalOffset = offset;
@@ -119,3 +149,29 @@ double MeasureUnit::getGlobalTempOffset()
 {
   return _globalOffset;
 }
+
+/**
+ * Cette méthode permet de calibrer toutes les temperatures en faisans la moyenne et appliquant un offset individuel
+ */
+void MeasureUnit::levelTemperaturesOff()
+{
+  double averageTemp(0);
+
+  for(int i(0); i < _thermistorCount; i++)
+  {
+    averageTemp += _temperatures[i];
+  }
+
+  averageTemp /= _thermistorCount;
+
+  for(int i(0); i < _thermistorCount; i++)
+  {
+    _rOffsetMap[i] = averageTemp - _temperatures[i];
+  }
+  
+}
+
+double *MeasureUnit::getROffsetMap()
+{
+  return _rOffsetMap;
+}

lib/MeasureUnit/MeasureUnit.h

@@ -3,7 +3,7 @@
 #include "AdcSetting.h"
 #include "ThermistorSetting.h"
 
-#define DEBUG
+//#define DEBUG_TEMP
 
 class MeasureUnit
 {
@@ -12,13 +12,17 @@ class MeasureUnit
     MeasureUnit(uint8_t *analogInput, uint16_t thermistorCount, uint64_t precResistor, ThermistorSetting thermistorSetting, AdcSetting adcSetting);
     ~MeasureUnit();
     void setGlobalTempOffset(double offset);
+    void levelTemperaturesOff();
     double getGlobalTempOffset();
     double *getTemperatures();
+    double *getROffsetMap();
 
     ERROR getError(){return _error;}
     
   protected:
   private:
+    double computeTemperature(double beta, double resistance, double rAt25);
+    
     double _globalOffset; //Correspond à l'offset global nécessaire afin d'avoir une température qui corresponde à la réalité
     double *_temperatures; //Tableau contenant toutes les températures
     double *_rOffsetMap; //Tableau qui contient les offsets individuels pour chaque thermistance

lib/MeasureUnit/MeasureUnit.ino

@@ -9,22 +9,51 @@
 #include "MeasureUnit.h"
 
 uint8_t analogInput[] = {PA0,PA1,PA2,PA3,PA4,PA5,PA6,PA7};
+double *tempArray = NULL;
+
 ThermistorSetting thermistorSetting(4050, 47000);
-AdcSetting adcSetting(3.3, 12, 30, 20);
+AdcSetting adcSetting(3.3, 12, 310, 3);
 
 MeasureUnit measureUnit(analogInput, 8, 1000, thermistorSetting, adcSetting);
 
 void setup() {
   // put your setup code here, to run once:
   Serial.begin(115200);
+  delay(5000);
   Serial.println("Start setup");
   
   Serial.println("End setup");
 
+  Serial.println("|   T1    |   T2    |   T3    |   T4    |   T5    |   T6    |   T7    |   T8    |");
+
 }
 
+int compteur(0);
+
 void loop() {
   // put your main code here, to run repeatedly:
-  measureUnit.getTemperatures();
-  delay(5000);
+  tempArray = measureUnit.getTemperatures();
+
+  Serial.print("|");
+  for(int i(0); i < 8; i++)
+  {
+    if(i != 7)
+    {
+      Serial.print("  ");Serial.print(tempArray[i]);Serial.print("  |");
+    }
+    else
+    {
+      Serial.print("  ");Serial.print(tempArray[i]);Serial.println("  |");
+    }
+  }
+
+  //On effectue la calibration
+  if(compteur == 5)
+  {
+    Serial.println("********************Start calibration********************");
+    measureUnit.levelTemperaturesOff();
+    Serial.println("********************End calibration********************");
+  }
+  
+  compteur++;
 }