ASTA motion capture

Revision as of 16:45, 1 February 2021

Specs

• Covered area: 16 m x 12 m
• Accuracy: < 5 mm
• Repetability: < 1 mm
• Number of cameras: 16
• Camera type: Prime 17W

Usage

Power on

• Depending on the lighting conditions, switch on the reflectors. The switch stands on the right-hand side after entering through the rotating door.

• Find the motion capture computer in the central shed, and turn it on by pressing on the "cooling master" logo.

• Plugin the green plug to power on the two network switched and the 16 cameras.

Calibration

• Start Motive.

ROS client

In case the system needs to be reassembled

Mount cameras on joints and joints on clamps

Make sure that the camera is not upside-down.

Prepare 16 safety ropes to prevent accidental camera drops

1. Cut to 1 m length
2. Use a lighter at both ends
3. prepare 8-knots as in rock climbing

Mount cameras on truss and wire them with the two switches

Mount the 16 cameras in the corners and at each 1/4 of the edges. Use the safety ropes, and wire them to the two switches as below.

Orient cameras and adjust focus

Once the setup is up-and-running, adjust the focus of each camera using a marker at 2/3 of the working distance. Use a remote desktop app and ethernet connection.

• In the corners: the bottom of FoV is parallel to the long edges, and the bottom right corner is vertical.

• At 1/4 of a short: the top of the FOV is horizontal, and the camera points toward the center.

• At 1/2 of a short edge: the bottom of the FOV is vertical, and the camera aims downward.

• At 1/4 of a long edge: the top of the FOV is horizontal, and the camera points toward the center.

• At 1/2 of a long edge: the bottom of the FOV is vertical, and the camera aims downward.