Back to results
US 2003/0115015 A1Published application
Multi-purpose sensor and data link
AssigneeOtis Elevator Company
InventorsLester H. Kosowsky, Richard Gryzbowski
Life of this patent
Estimating the term…
Abstract
Modulating digital data onto a carrier frequency and then amplitude modulating the result with a waveform of a different frequency permits measuring position and velocity of an elevator cab while transmitting digital data to the cab.
Claims8
A method for determining range and velocity of an object compared to a station, comprising the steps of:
- providing a reflector on said object;
- modulating digital data at said station onto a first waveform using one of phase modulation and frequency modulation to produce a first output;
- amplitude modulating said first output with a second waveform to produce a second output;
- transmitting said second output from said station to said object, wherein a return signal is generated by a portion of said second output being reflected from said reflector;
- receiving said return signal at said station and processing said return signal to obtain said range and said velocity of said object;
- and
- processing said second output at said object to recover said digital data modulated onto said first waveform at said station.
4 more elements
A system for determining range and velocity of an object compared to a station, comprising:
- means for providing a reflector on said object;
- means for modulating digital data at said station onto a first waveform using one of phase modulation and frequency modulation to produce a first output;
- means for amplitude modulating said first output with a second waveform to produce a second output;
- means for transmitting said second output from said station to said object, wherein a return signal is generated by a portion of said second output being reflected from said reflector;
- means for receiving said return signal at said station and processing said return signal to obtain said range and said velocity of said object;
- and
- means for processing said second output at said object to recover said digital data modulated onto said first waveform at said station.
4 more elements
Dependencies are inferred from the claim text.