Logical Sensor Network: An Abstraction of Sensor Data Processing over Multidomain Sensor Network

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Source code for filter node (lowpass filter) node in Java.

1  public class  LowpassFilter  extends Filter{

2 private static final double k  = 0.1;

3 private double smooth;

4 public LowpassFilter(String n, Trigger t) {

5  super(n, t);

6 }

7 @Override

8 public Data filter(Data d) {

9  smooth += (data.getValue() – smooth) * k;

10  Data res = new ProcessorData(d);

11  res.setValue(smooth Value);

12  return res;

13 }

14 }