Arduino/DIY-Arduino-variometer
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Thomas Livernet
2014-02-11 16:55:09 +01:00
parent 6599c3b03b
commit 95269da03f
3 changed files with 19 additions and 13 deletions
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Variometer/Variometer.ino
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@@ -864,25 +864,31 @@ void loop()
// set up my_temperature // set up my_temperature
bmp085.getTemperature(&my_temperature); bmp085.getTemperature(&my_temperature);
// take new altitude in meters // take new altitude in meters
Altitude = bmp085.pressureToAltitude(conf.p0, average_pressure, my_temperature) + conf.currentAltitude; Altitude = bmp085.pressureToAltitude(conf.p0, average_pressure, my_temperature) + conf.currentAltitude;
float tempo = millis(); float tempo = millis();
float D2 = (tim - tempo); //float D2 = (tim - tempo);
float N1 = D2 * alt; //float N1 = D2 * alt;
float N2 = D2 * (alt + Altitude); //float N2 = D2 * (alt + Altitude);
float D1 = D2 * D2; //float D1 = D2 * D2;
/*
= (2 * N1 - N2) / D1
= 2 * (D2 * alt) - D2 * (alt + Altitude) / (tim - tempo)²
= 2 * (D2 * alt) - (D2 * alt + D2 * Altitude) / (tim - tempo)²
= (D2 * alt) + (D2 * alt) - (D2 * alt) - (D2 * Altitude) / (tim - tempo)²
= (D2 * alt) - (D2 * Altitude) / (tim - tempo)²
= D2 * (alt - Altitude) / (tim - tempo)²
= ((tim - tempo) * (alt - Altitude)) / (tim - tempo)²
= (alt - Altitude) / (tim - tempo)
*/
//vario = vario * 0.80 + (1000 * (2 * N1 - N2) / D1) * 0.2;
vario = vario * 0.80 + (1000 * 0.2 * ((alt - Altitude) / (tim - tempo)));
alt = Altitude; alt = Altitude;
tim = tempo; tim = tempo;
/*
2 * (D2 * alt) - D2 * (alt + Altitude)
2 * (D2 * alt) - (D2 * alt + D2 * Altitude)
(D2 * alt) + (D2 * alt) - D2 * alt + D2 * Altitude
*/
vario = vario * 0.80 + (1000 * (2 * N1 - N2) / D1) * 0.2;
// Update stats if chrono is running // Update stats if chrono is running
if (stat.chrono_start != 0) { if (stat.chrono_start != 0) {