Smoothing analog sensor values: Unterschied zwischen den Versionen
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If the sensor value on your analog pin has some unwanted amplitudes, you can smooth it with some tricks. | If the sensor value on your analog pin has some unwanted amplitudes, you can smooth it with some tricks. | ||
==smoothing analog sensor values | ==trick#1) smoothing analog sensor values== | ||
Tremors can come from fluctuating power supply, interference or a circuit inside the Arduino chip. | Tremors can come from fluctuating power supply, interference or a circuit inside the Arduino chip. | ||
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</source> | </source> | ||
==smoothing analog sensor values #2: running average== | ==trick#2) smoothing analog sensor values #2: running average== | ||
To smooth your sensor value, a simple line of code you can add to calculate the running average is: | To smooth your sensor value, a simple line of code you can add to calculate the running average is: | ||
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>> https://www.kobakant.at/DIY/?p=7968 | >> https://www.kobakant.at/DIY/?p=7968 | ||
==smoothing library== | ==trick#3) smoothing library== | ||
"RunningAverage" | "RunningAverage" | ||
https://www.arduino.cc/reference/en/libraries/runningaverage/ | https://www.arduino.cc/reference/en/libraries/runningaverage/ |
Aktuelle Version vom 19. Januar 2024, 14:33 Uhr
If the sensor value on your analog pin has some unwanted amplitudes, you can smooth it with some tricks.
trick#1) smoothing analog sensor values
Tremors can come from fluctuating power supply, interference or a circuit inside the Arduino chip.
In this example, we simply take a portion of the new measurement and combine it with a portion of the value measured last time. The part of the old value is always a bit bigger than the new value and so the new value influences the measurement but we overwrite the tremor.
>> https://www.youtube.com/watch?v=AsQ4G1lckhY
int sensorValue;
void setup(){
Serial.begin(9600);
}
void loop(){
sensorValue = analogRead(A0);
smoothValue = 0.6 * smoothValue + 0.4 * sensorValue; //you can tray with the values you multiply. It is just always under 1
Serial.print(sensorValue);
Serial.print("\t"); //TAB
Serial.print(smoothValue);
}
trick#2) smoothing analog sensor values #2: running average
To smooth your sensor value, a simple line of code you can add to calculate the running average is:
averageSensorValue = (averageSensorValue * (average-1) + currentSensorValue) / average;
>> https://www.kobakant.at/DIY/?p=7968
trick#3) smoothing library
"RunningAverage"
https://www.arduino.cc/reference/en/libraries/runningaverage/