Abstract: A motion capture apparatus (10) comprises a series of sensor nodes (12) connected to a transceiver hub. Each node (12) comprises a 3D accelerometer (20), a (3) axis gyroscope array 21a, b and a microprocessor (29) on one side of a double-sided PCB (18). A vibration transducer (31) is arranged on the other side of the PCB (18). A controller receives sensed data from multiple nodes enabling the relative angle between nodes to be determined periodically. The controller multiplexes between receiving sensed data from the node and activating/deactivating the transducer (31) to give the impression of simultaneous sensing and vibration without the vibration affecting the sensed data.
Type:
Application
Filed:
January 21, 2010
Publication date:
February 23, 2012
Applicant:
BIRMINGHAM CITY UNIVERSITY
Inventors:
Jonathan Anthony Green, Gregory Charles Sporton
Abstract: An article of headgear, particularly but not limited to surgeon's headgear, comprises a frame 12, a lighting arrangement 68 on the frame arranged to point generally towards a focal point in front of the frame. The headgear is arranged such that, when worn on the head of a user, the centre of gravity of the headgear 78 is arranged rearwardly relative to the nodding pivot point of the head of the user. The frame 12 has a front part and a rear part. The front part carries a piece of optical equipment 104 and the rear part carries a lighting arrangement 68 or power source. The weight of the lighting arrangement 68 or power source at least partially counterbalances the weight of the optical equipment 104 or vice versa.