Vicon IX 2000 L Información técnica descargar pdf (Pagina 110)

MX Calibration Kit

12-8 Vicon MX Hardware System Reference

Dynamic Stage (Camera Calibration)

During the dynamic stage of system calibration, the Vicon application

software calculates the physical position and orientation of each Vicon

camera in the capture volume based on the movement of a calibration

wand. The calibration wand you use for this stage depends on your

MX system, as described in Calibration Kit Contents on page 12-2.

The objective of the dynamic stage is to describe the capture volume

to the MX system. Wave the calibration wand throughout the empty

capture volume, ensuring that the markers on the wand are visible

to the cameras, until a good number of wand frames are spread

evenly across the field of view for each camera. Your Vicon application

software provides feedback to help you determine when enough wand

data has been acquired to calibrate each camera. For details, see the

documentation for your Vicon software.

Static Stage (Capture Volume Calibration)

During the static stage of system calibration, the Vicon application

software measures the position of the static calibration object and

sets global coordinate system. The calibration object you use for this

stage depends on your MX system, as described in Calibration Kit

Contents on page 12-2.

The objective of the static stage is to set the global coordinates

system so that subjects are displayed the right way up and so that

you can change the way data is visualized in the Vicon application

software workspace. Place the static calibration object flat on the floor

to identify the coordinates of the global origin (0,0,0), which

represents the center of the capture volume, and the global axes

(X,Y,Z), which represent the horizontal and vertical axes of the

capture volume.

If you are using force plates to identify the origin of the global

coordinate system, attach the alignment plates supplied with the

calibration kit to the static calibration object.

If you are not using force plates, adjust the feet of the static

calibration object to ensure that they are all flat on the floor:

• If you are using the MX calibration wand, start with the handle and

adjust the foot between the fixed foot and the hand grip, and then

adjust the other foot until the bubble in the spirit level is in the

center. Next on the top edge of the wand, adjust the foot on the

left end until the bubble in the spirit level is in the center. To adjust

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Vicon IX 2000 L Información técnica Pagina 110