Package analoginput.calibration

Class AddThenMultiplyThenAdd

java.lang.Object
analoginput.calibration.AddThenMultiplyThenAdd
All Implemented Interfaces:
SensorCalibration
public class AddThenMultiplyThenAdd extends Object implements SensorCalibration
Add Then Multiply then Add is a calibration method in it that has some unnecessary, but useful redundancy. Add then multipl makes it easy to use 4 - 20mA sensors, since the output is imply (input-.004)*maxDepth/.016; However, if you then need to add an additional offset correction, it's much easier to add a third parameter, so output is (input-.004)*maxDepth/.016 + offset. Without the third parameter, it would be necessary to do a complicated recalculation of the first parameter, (input + a)*maxDepth/.016, where a = -.004 + offset*.016/maxDepth.
Author:
dg50

  • Constructor Details

    • AddThenMultiplyThenAdd

      public AddThenMultiplyThenAdd()

  • Method Details

    • rawToValue

      public double rawToValue(double rawValue, CalibrationData calibrationData) throws CalibrationException
      Description copied from interface: SensorCalibration
      Convert a value from an ADC, which will probably have already been converted to volts or amps into an 'engineering' unit, e.g. depth, heading, etc.
      Specified by:
      rawToValue in interface SensorCalibration
      Parameters:
      rawValue - Value from acquisition device
      Returns:
      value in engineering units.
      Throws:
      CalibrationException