coid, pid, $x_0$, $y_0$, $z_0$, $R$, csysid, ref, lagrange
|pid||Sensor type or ID of part where the sensor is located|
|$x_0$||Initial x-coordinate of sensor|
|$y_0$||Initial y-coordinate of sensor|
|$z_0$||Initial z-coordinate of sensor|
|$R$||Sensor radius (for pid=DP only)|
|csysid||Optional local coordinate system ID|
|ref||Reference system for velocity and displacement output|
|lagrange||Particle sensor (DP) flag to let the sensor follow the material flow|
A sensor can either sample the local state at a material point inside a specified part, or sample the discrete particle state at a specified fixed point in space (see PARTICLE_DOMAIN).
If referring to a part ID, the command will sample the local state at a material point initially located at coordinate $(x_0,y_0,z_0)$. The solver uses the nearest integration point and node (in the specified part) and outputs the sampled data to the ASCII file sensor.out.
If specifying pid=DP (discrete particles) the sensor is fixed in space and will sample the average particle density, velocity and pressure inside a sphere with radius $R$. The data is then output to the ASCII file particle_sensor.out.
Stresses, coordinates, displacements and velocities are output in the local coordinate system (if defined). Also the sensor location $(x_0, y_0, z_0)$ is defined in this local coordinate system.