Methods and Apparatus for Sensing Organic Tissue
First Claim
1. A method comprising:
- transmitting radio signals from a first antenna to a second antenna, at least one of the first and second antennas being a directional antenna, andprocessing data regarding received signal strength of the radio signals to determine the position, velocity or number of one or more bodies that are between or that cross between the first and second antennas.
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Abstract
In exemplary implementations of this invention, a radio signal is transmitted between a transmitter and a receiver. Either the transmitter, or receiver, or both, have a directional antenna. When organic tissue passes between (or is stationary between) the transmitter and receiver, the tissue causes a reduction of the received signal strength (RSS) of the signal, as compared to a baseline RSS. The larger the amount of tissue, the greater is the reduction of the RSS. By analyzing the degradation of the signal, information about organic tissue between the transmitter and receiver may be determined. For example, the number of persons passing through a physical threshold may be determined. Or the fact that one person is walking faster than, and catching up with, a second person as they pass between the transmitter and receiver may be determined.
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Citations
20 Claims
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1. A method comprising:
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transmitting radio signals from a first antenna to a second antenna, at least one of the first and second antennas being a directional antenna, and processing data regarding received signal strength of the radio signals to determine the position, velocity or number of one or more bodies that are between or that cross between the first and second antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus comprising, in combination:
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a transmitter for transmitting radio signals, which transmitter includes a first antenna, a receiver for receiving the radio signals, which receiver includes a second antenna, at least one of the first and second antennas being a directional antenna, and at least one processor for processing data regarding the received signal strength of the radio signals received by the receiver and determining, based on that data, the number of the bodies that move past a threshold. - View Dependent Claims (16, 17)
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18. Apparatus comprising
a first transmitter for transmitting radio signals, a first receiver for receiving the radio signals and outputting electrical signals, a signal conditioning module for accepting the electrical signals and for outputting conditioned signals, and at least one processor for processing the conditioned signals to determine reduction in received signal strength of the radio signals relative to a baseline, and based on the reduction, determining the position, velocity or number of one or more bodies that are between, or cross between, the first and second antennas, wherein the first transmitter includes a first antenna and the first receiver includes a second antenna, and at least one of the first or second antennas is a directional antenna.
Specification