Device for measuring distance and determining position from a reference point, and method of using same

摘要

An apparatus for determining and indicating the location of an end portion of a probe inserted into an external body. As the probe moves it rotates a measuring wheel to indicate linear translation, and optionally also moves another measuring wheel to indicate angular rotation of the probe. The data representative of probe linear insertion and angular orientation is recorded synchronously on a record for display with data obtained from a transponder positioned near the end portion of the probe.