calibration ec manual

This commit is contained in:
interfisch 2023-05-09 23:20:47 +02:00
parent a8def64601
commit 8cf4395827
4 changed files with 61 additions and 29 deletions

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@ -29,7 +29,7 @@ uint16_t ec_calib_array_pos=0;
uint16_t ec_array[EC_ARRAY_SIZE];
uint16_t ec_array_pos=EC_ARRAY_SIZE;
unsigned long last_measurement_ec=0;
#define EC_MEASUREMENT_INTERVAL 30000 //complete filtered measurement every x ms
#define EC_MEASUREMENT_INTERVAL 60000 //complete filtered measurement every x ms
//One filtered measurement takes EC_READ_INTERVAL*EC_ARRAY_SIZE*4
#define EC_READ_INTERVAL 10 //interval of reading adc value inside a measurement. one reading takes about 9-10ms
@ -52,14 +52,15 @@ float ec25; //ec value but temperature adjusted for 25 degC
float ec_tempadjust_alpa=0.02;
float ec_reference_adc=6016.88; //adc reference value for the calibration resistor measurement.
//EC short circuit adc value: 17497 (for connection restistance testing)
//EC open circuit adc value: 738
//EC short circuit adc value: 17497, 17861.4 (for connection resistance testing)
//EC open circuit adc value: 738, 730, 737.27
//x^0*p[0] + ... + x^n*p[n]
//float ec_calibration_polynom[]={691.5992624638029,-1.4015367296761692,0.0008513503472324141,-2.2140576823179093e-07,2.8962580780180067e-11,-1.8577565383307114e-15,4.7162479484903865e-20};
float ec_calibration_polynom[]={1033.928052655456,-3.8909104921922895,0.005627541436014758,-4.103988840997024e-06,1.7231981870816133e-09,-4.433707707721975e-13,7.203892111369395e-17,-7.406549810844244e-21,4.667420606439905e-25,-1.6439457516812463e-29,2.477292190335455e-34};
float ec_calibration_linearize_below_adc=0; //use linear approximation below this adc value. 0=disable
float ec_calibration_linear_lowADC=830; //x0
//float ec_calibration_polynom[]={1033.928052655456,-3.8909104921922895,0.005627541436014758,-4.103988840997024e-06,1.7231981870816133e-09,-4.433707707721975e-13,7.203892111369395e-17,-7.406549810844244e-21,4.667420606439905e-25,-1.6439457516812463e-29,2.477292190335455e-34};
float ec_calibration_polynom[]={212.6826331524675,-0.6043878865263305,0.000571551634082491,-1.827897106718841e-07,2.682337041246909e-11,-1.8368511021965982e-15,4.8269168538877025e-20};
float ec_calibration_linearize_below_adc=6500; //use linear approximation below this adc value. 0=disable
float ec_calibration_linear_lowADC=750; //x0
float ec_calibration_linear_lowEC=0; //y0
bool ec_measurementReady();

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@ -6,20 +6,28 @@
#define HCSR04_PIN_ECHO 17
#define HCSR04_PIN_TRIGGER 16
#define HCSR04_TIMEOUT 5000 //default is 100000 (uS)
#define READINTERVAL_HCSR04 500
#define READINTERVAL_HCSR04 200
#define WATERLEVELMEAN_SIZE 32
#define WATERLEVELMEAN_FILTER_CUTOFF 8 //max value is around WATERLEVELMEAN_SIZE/2
float waterlevelMean_array[WATERLEVELMEAN_SIZE];
uint16_t waterlevelMean_array_pos=0;
#define WATERLEVEL_UNAVAILABLE -1
float waterlevel=WATERLEVEL_UNAVAILABLE;
float waterlevel=WATERLEVEL_UNAVAILABLE; //distance from floor to water surface [mm]
float watervolume=WATERLEVEL_UNAVAILABLE; //calculated Volume in Reservoir
uint16_t waterlevel_failcounter=0;
#define WATERLEVEL_MAXFAILS 15 //maximum counter value
#define WATERLEVEL_FAILTHRESHOLD 10 //if failcounter is greater or equal this value waterlevel will not be valid
//Calibration
float waterlevel_calib_offset_measured=0; //Sollwert
float waterlevel_calib_offset_sensor=178.67; //Istwert
float waterlevel_distanceToVolume(float distance);
float waterlevel_calib_reservoirArea=27*36.5; //area in cm^2
float waterlevel_heightToVolume(float distance);
void waterlevel_setup() {
@ -62,16 +70,20 @@ void waterlevel_loop(unsigned long loopmillis) {
if (isValueArrayOKf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVEL_UNAVAILABLE)){
float _distance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,8);
//float _distance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVELMEAN_FILTER_CUTOFF);
float _distance=getMaxf(waterlevelMean_array,WATERLEVELMEAN_SIZE);
waterlevel=waterlevel_distanceToVolume(_distance);
//Invert distance and offset
waterlevel=distance-(waterlevel_calib_offset_sensor+waterlevel_calib_offset_measured);
watervolume=waterlevel_heightToVolume(_distance);
//float _meanWaterlevel=getMeanf(waterlevelMean,WATERLEVELMEAN_SIZE);
//Serial.print("\t Dist="); Serial.print(_filteredWaterlevel); Serial.print("mm"); Serial.print("(+- "); Serial.print((getMaxf(waterlevelMean,WATERLEVELMEAN_SIZE)-getMinf(waterlevelMean,WATERLEVELMEAN_SIZE))/2.0); Serial.print(")"); Serial.print(" [mean="); Serial.print(_meanWaterlevel); Serial.print("]");
}
if (waterlevel_failcounter>=WATERLEVEL_FAILTHRESHOLD) { //too many failed readings
waterlevel=-1;
waterlevel=WATERLEVEL_UNAVAILABLE;
watervolume=WATERLEVEL_UNAVAILABLE;
/*if (debug) {
Serial.print("Waterlevel Failcounter="); Serial.println(waterlevel_failcounter);
}*/
@ -80,8 +92,8 @@ void waterlevel_loop(unsigned long loopmillis) {
}
}
float waterlevel_distanceToVolume(float distance){
return distance;
float waterlevel_heightToVolume(float distance){
return waterlevel_calib_reservoirArea/100 * distance/100; //area[cm^2] in dm^2 * height in dm = dm^3= L
}
#endif

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@ -8,7 +8,7 @@ import matplotlib.pyplot as plt
from pandas import *
# reading CSV file
data = read_csv("20230505_NaCl_optimized.csv")
data = read_csv("20230509_NaCl_manuell.csv")
# converting column data to list
#solutionAdded = data['solutionAdded'].tolist() #in ml
@ -68,7 +68,7 @@ xmodel = np.arange(xstart,xstop,increment)
for model_order in [9,10,11]:
for model_order in [3,4,5,6]:
print("model order="+str(model_order))
# Finding the Model
p = np.polyfit(x, y, model_order)

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@ -1,6 +1,6 @@
#include <Arduino.h>
bool debug=true; //print Serial information
bool debug=false; //print Serial information
#include "helpfunctions.h"
#include "ADS1X15.h"
@ -82,7 +82,7 @@ void setup() {
//Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted,EC,EC25");
//Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted,sm");
Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted");
}
@ -100,14 +100,34 @@ void loop() {
sm_loop(loopmillis);
static bool getReading=false;
if (!digitalRead(PIN_BUTTON)) {
last_check=loopmillis;
valueError=false;
Serial.println("Reset ValueError flag by user");
digitalWrite(PIN_LED,valueError);
//Serial.println("Reset ValueError flag by user");
//digitalWrite(PIN_LED,valueError);
delay(100);
last_measurement_ec=0; //force reading
getReading=true;
ec_flag_measurement_available=false;
digitalWrite(PIN_LED,HIGH);
}
if (loopmillis>last_check+2000) { //check values
if (ec_flag_measurement_available && getReading) {
ec_flag_measurement_available=false;
getReading=false;
digitalWrite(PIN_LED,LOW);
Serial.print(loopmillis); Serial.print(",");
Serial.print(tempCmean_reservoir); Serial.print(",");
Serial.print(ec_calib_adc); Serial.print(",");
Serial.print(ec_adc); Serial.print(",");
Serial.print(ec_adc_adjusted);
Serial.println();
}
if (loopmillis>last_check+2000 && 1==2) { //check values
last_check=loopmillis;
@ -181,11 +201,12 @@ void loop() {
Serial.print(ec25);
Serial.println();
Serial.print("Waterlevel="); Serial.print(waterlevel);
Serial.print("Waterlevel distance,volume = "); Serial.print(waterlevel); Serial.print(","); Serial.print(watervolume);
if (waterlevel_failcounter>0) {
Serial.print(" fails="); Serial.print(waterlevel_failcounter);
}
Serial.println();
}
@ -252,7 +273,5 @@ void loop() {
/*
TODO:
- waterlevel nur -1
- waterlevel distance to volume fukntion
- soilmoisture min max calibartion einfügen
- recalibrate EC. Note min max (shorted, open) values. Test screw terminal connection. Recalibrate EC Probe.
*/