Patent
Optical transducer systems
Reads0
Chats0
TLDR
An optical transducer system for producing an optical output signal representative of the rotational speed of a rotary member, particularly a shaft of a gas turbine engine, comprises a conventional inductive speed probe positioned adjacent the shaft to sense the passing of the teeth of a toothed wheel secured to and rotatable with the shaft as discussed by the authors.Abstract:
An optical transducer system for producing an optical output signal representative of the rotational speed of a rotary member, particularly a shaft of a gas turbine engine, comprises a conventional inductive speed probe positioned adjacent the shaft to sense the passing of the teeth of a toothed wheel secured to and rotatable with the shaft. The inductive sensor thus produces an AC output signal whose frequency is proportional to the rotational speed of the shaft, and this signal is used to excite electrostatically vibration of a cantilever beam micromachined in silicon. The vibrating beam is arranged in an optical path defined by one or more optical fibres, such that its vibrations modulate light directed along the optical path at a frequency which is again proportional to the rotational speed of the shaft.read more
Citations
More filters
Patent
Electrostatic rotary atomizing spray device
Dennis Davis,Harold Beam,Ronald R Schroeder,Carl A. Bretmersky,Stephen L. Merkel,Thomas Andreas Trautzsch +5 more
TL;DR: A rotary atomizer has an internal power supply in the atomizer housing about which is passed cooling air as discussed by the authors, and the air then flows out of a rotating atomizer in a twisting direction as vectored air in the same direction of rotation as an atomizer head.
Patent
Electrostatic rotary atomizing spray device with improved atomizer cup
Michael P. Hansinger,Jeffrey T. Conrad,Woodie Francis,Harold Beam,Joseph Jerome Karbowniczek,Ronald Amherst Schroeder +5 more
TL;DR: The rotary atomizer with the improved charge ring and rotary cup can be mounted to a robot and connected to the liquid supply by an elongated spiral passageway to increase the electrical resistance as discussed by the authors.
Patent
Vehicle anti-collison device
TL;DR: In this article, a vehicle anti-collision device comprising a laser rangefinder mounted inside a vehicle near to a windshield thereof is used to detect two vehicles travelling in the same lane and in different lanes.
Patent
Displacement measurement apparatus with dual wedge interferometers
TL;DR: In this article, the position information is encoded optically by the reading means using an interferometer to frequency modulate the transmitted light and the decoding means has a second interferometers to analyse received light and produce an electrical output representing the binary word.
Patent
Magneto-optical readout method and magneto-optical readout head and method for making same
TL;DR: A magneto-optical readout head for reading out magnetically stored data has a high optical quality substrate and a transducer applied to the substrate formed by a Faraday rotator and a Kerr rotator as discussed by the authors.
References
More filters
Patent
Distributed sensor array and method using a pulsed signal source
TL;DR: In this paper, a distributed sensor system using pulsed optical signals optionally produced by a short coherence length source to provide a phase difference output signal representative of conditions affecting a selected sensor is presented.
Patent
Method for the measurement of lengths and displacements
TL;DR: In this paper, a method and apparatus for the remote measurement of a quantity of length or displacement, employing fiber-optical signal transmission between two or more interferometers, one of which acts as an optical transducer while the other acts as the receiver for the information about the quantity to be measured.
Patent
Coherence multiplexed optical position transducer
TL;DR: In this paper, a single optical fiber transducer system employs a single transceiver that carries an optical carrier signal to a remote transducers and also carries a multiplexed multichannel signal, each channel having a characteristic delay and a binary amplitude value, to a receiving unit, where each channel of a set of reference signals having a corresponding characteristic delay interferes with the multiple-channel signal to separate a channel signal that is envelope detected.
Patent
Optical fiber measuring devices
Morgan Adolfsson,Torgny Brogardh +1 more
TL;DR: In this article, an optical fiber device for measuring of current and/or voltage, including at least one light conductor for transmitting optical signals between an optical transducer and light generating and light processing circuitry, is described.