eddyCurrentMix

ET Typeobject 4.3.0

The eddyCurrentMix describes how two data streams are combined. This process is typically used to remove a known perturbation from a signal built from the effects of multiple sources. In this representation, \(Z_1\) typically carries the useful signal along with the perturbation wile \(Z_2\) mostly carries the perturbation alone.

The mixing formula is applied independently per channel:

\[ Z_{mix} = Z_1 + (k1 + \mathrm{i}\,k3)\cdot\Re(Z_2) + (k2 + \mathrm{i}\,k4)\cdot\Im(Z_2) \]

where \(Z\) denotes Impedance, \(\Re\) the real part, and \(\Im\) the imaginary part.

Property	Type	Description
z1InputId required	integer	Id of the process input providing the \(Z_1\) impedance data
z2InputId required	integer	Id of the process input providing the \(Z_2\) impedance data
channels required	array	A channels array defining the mixing coefficients for each acquisition channel

channels

Typearray

Each entry in the channels array specifies the four mixing coefficients applied to a single acquisition channel.

Property	Type	Description
id required	integer	Unique channel id within the mix
k1 required	number	Real scaling factor of \(\Re(Z_2)\)
k2 required	number	Real scaling factor of \(\Im(Z_2)\)
k3 required	number	Imaginary scaling factor of \(\Re(Z_2)\)
k4 required	number	Imaginary scaling factor of \(\Im(Z_2)\)

Examples

"eddyCurrentMix": {
    "z1InputId": 0,
    "z2InputId": 1,
    "channels": [
        {
            "id": 0,
            "k1": 1.0,
            "k2": 0.0,
            "k3": 0.0,
            "k4": 1.0
        },
        {
            "id": 1,
            "k1": -0.8,
            "k2": 0.2,
            "k3": 0.1,
            "k4": -0.9
        }
    ]
}