摘要:
A system is provided for use during a medical procedure. The system has at least one sensing device holder configured to hold a radiation sensing device, a ring guide, and a rod which connects the holder to the ring guide. The ring guide includes a ring having a central opening and first and second connecting portions extending outwardly therefrom. The ring defines horizontal and vertical axes which pass through an axial centerline of the ring guide. Each connecting portion has a channel which accepts the rod therethrough and which is parallel to the axial centerline. The channel of the first connecting portion intersects the horizontal axis, and is offset from the vertical axis. The channel of the second connecting portion is offset from the horizontal and vertical axes. The rod can be attached to either of the connecting portions.
摘要:
This optoelectronic, finger-operated keyboard for use in industrial measurement equipment is designed to achieve an optimum signal-to-noise ratio and minimize the drop in the intensity of the infrared emitters during the service life of the measurement equipment. The keys for generating respective associated operation signals (n1, n2, n3) have an infrared-transmitting cover (1), one infrared emitter (3) per key disposed at the inside (12) of the cover and emitting light collimated virtually perpendicular thereto, one infrared detector (4) adjacent to each infrared emitter which is separated from the latter by a shield (5) opaque to infrared and is pointed at the cover, said infrared detector being located within the main radiation range of the infrared light emitted by the infrared emitter and scattered at a finger (2) but outside the infrared light reflected from the outside and/or inside of the cover. An operating circuit (8) comprises a separate control and detection circuit (15, 25, 35) for each key which generates current-control pulses (si1, si2, si3) with a mark/space ratio less than 1:1 for feeding the infrared emitter (13, 23, 33), and a scanning circuit (18) common to all keys which switches a current switch (19) connecting all control and detection circuits (15, 25, 35) to one terminal (SN) of a supply-voltage source into a conducting state.
摘要:
A programmable field measuring instrument includes a control unit, and a connector terminal, and a software protection device. The control unit executes a control program. The connector terminal is connected to the software protection device such that the software protection device may be released from the connector terminal. The software protection device includes a connector mating element with an integrated electronic component which allow authorization examination by the control unit.