Patent ID: 6048324
Filing Date: 2000-04-11
Classification: A42B,A61B,A63B,G08B

Abstract:
A head motion sensing apparatus, worn by a user, for sensing the motion of the user's head during one of a plurality of pre-selected activities, the apparatus comprising:sensors that sense the movement the user's head from a known initial position and output at least one sensor signal indicative of the direction and rotational speed of the user's head motion;an analog to digital converter for converting the at least one sensor signal to at least one digital signal;a digital processor for receiving the at least one digital signal, performing an integration to calculate an angular displacement related to the at least one sensor signal, and comparing the calculated angular displacement to at least one predetermined digital reference value that establish bounds for the user's head movement during the one of a plurality of pre-selected activities;a memory comprising data representing the digital reference values that establish bounds for the user's head movement during the one of a plurality of pre-selected activities;an alarm device for generating at least one alarm signal indicative of the amount of conformity between the user's head movement and the established bounds; andan interface that enables the user to select at least one of the plurality of pre-selected activities.