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US 8,772,724 B2Granted
Low power, inexpensive velocity detection using a PIR array
AssigneeIntel-GE Care Innovations LLC
InventorWilliam C. DeLeeuw
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Abstract
Methods and systems may include a system including a first passive motion sensor having a lateral field of view with a first edge and a second passive motion sensor having a lateral field of view with a second edge that is substantially parallel to the first edge. The first and second edges can define a virtual beam. The system may also include logic to receive signals from the first and second passive motion sensors and determine a gait velocity and level of activity based on the signals from the first and second passive motion sensors.
Claims20
A method comprising:
- receiving signals from a first passive motion sensor and a second passive motion sensor, wherein the first passive motion sensor has a lateral field of view with a first edge and the second passive motion sensor has a lateral field of view with a second edge that is substantially parallel to the first edge, and wherein the first and second edges define a first virtual beam;
- and
- determining a gait velocity based on the signals from the first and second passive motion sensors.
An apparatus comprising:
- a first passive motion sensor having a lateral field of view with a first edge;
- and
- a second passive motion sensor having a lateral field of view with a second edge that is substantially parallel to the first edge, wherein the first and second edges are to define a first virtual beam.
A system comprising:
- a first passive motion sensor having a lateral field of view with a first edge;
- a second passive motion sensor having a lateral field of view with a second edge that is substantially parallel to the first edge, wherein the first and second edges are to define a first virtual beam;
- and
- logic to,
- receive signals from the first and second passive motion sensors, and
- determine a gait velocity based on the signals from the first and second passive motion sensors.
3 more elements
Dependencies are inferred from the claim text.