초록 ▼

A high speed communication apparatus for a computerized axial tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination at a point

A high speed communication apparatus for a computerized axial tomography (CAT) scanner utilizes large diameter slip rings to permit continuous rotation of a rotatable gantry. A communication signal is applied at a first point on one slip ring, and is terminated by a resistive termination at a point 180°opposite the driving point. The communication signal may then be received at any point on the slip ring. The drive and termination connections to the slip ring may be made by brushes, with the receive connection being made by a physical connection to the slip ring. Alternately, the drive and terminate connection may be made by physical contact, with the receive connection being made by a brush.

대표청구항 ▼

A communications apparatus for providing high speed communications between first and second electronics systems mounted on first and second mechanical mounting structures, respectively, where the first and second mechanical mounting structures are adapted for rotary movement with respect to each oth

A communications apparatus for providing high speed communications between first and second electronics systems mounted on first and second mechanical mounting structures, respectively, where the first and second mechanical mounting structures are adapted for rotary movement with respect to each other along an axis of rotation, the apparatus comprising: a first slip ring arranged coaxially with the axis of rotation between the first and second mechanical mounting structures; drive means mounted on the first mechanical mounting structure and connected to the first electronics system for transmitting an electrical signal voltage onto the first slip ring, the electrical signal voltage being referenced to a signal ground reference potential and being encoded with data to be communicated from the first electronics system to the second electronics system, the drive means including first connection means for making contact with the first slip ring at a first point in the frame of reference of the first mechanical mounting structure; termination means mounted on the first mechanical mounting structure for providing termination of the electrical signal voltage on the first slip ring, the termination means including; second connection means for making contact with the first slip ring at a second point in the frame of reference of the first mechanical mounting structure, the first and second points being located approximately diametrically opposite each other across the first slip ring; and a resistive termination connected between the second connection means and the signal ground reference potential; and receive means connected to the second electronic system on the second mechanical mounting structure for receiving the electrical signal voltage on the first slip ring, the receive means including third connection means for making contact with the first slip ring to receive the electrical signal voltage from the first slip ring.