DISTANCE MEASUREMENT FOR BUILDING AUTOMATION DEVICES WITH WIRELESS DATA COMMUNICATIONS
First Claim
1. A method for determining a distance for a building automation device, the method comprising:
- (a) wirelessly transmitting a first signal from the building automation device within a building;
(b) wirelessly receiving a second signal at the building automation device within the building; and
(c) determining a distance associated with the building automation device as a function of a time-of-flight for the first and second signals and a known time delay interval.
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Abstract
In a building environment, a distance associated with a building automation device is determined as a function of an interval or an inserted time delay between a wireless transmission of a signal and wireless reception of another signal. For example, a two-way communication is provided with an automatic interval or a desired time delay inserted before responding to a received transmission. By using two-way transmissions, the building automation devices may be free of clock synchronization. Acoustic signals may be used in a building environment to determine a distance. The building automation device may also use radio frequency information for communicating with other devices.
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Citations
12 Claims
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1. A method for determining a distance for a building automation device, the method comprising:
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(a) wirelessly transmitting a first signal from the building automation device within a building; (b) wirelessly receiving a second signal at the building automation device within the building; and (c) determining a distance associated with the building automation device as a function of a time-of-flight for the first and second signals and a known time delay interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12-22. -22. (canceled)
Specification