WO2022159315A8 - Building occupancy estimation using microwave doppler radar and time-frequency spectral analysis - Google Patents

Building occupancy estimation using microwave doppler radar and time-frequency spectral analysis Download PDF

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Publication number
WO2022159315A8
WO2022159315A8 PCT/US2022/012183 US2022012183W WO2022159315A8 WO 2022159315 A8 WO2022159315 A8 WO 2022159315A8 US 2022012183 W US2022012183 W US 2022012183W WO 2022159315 A8 WO2022159315 A8 WO 2022159315A8
Authority
WO
WIPO (PCT)
Prior art keywords
time
processor
spectral analysis
frequency spectral
segment
Prior art date
Application number
PCT/US2022/012183
Other languages
French (fr)
Other versions
WO2022159315A2 (en
Inventor
Amy Droitcour
Shekh Md Mahmudul ISLAM
Original Assignee
Amy Droitcour
Islam Shekh Md Mahmudul
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amy Droitcour, Islam Shekh Md Mahmudul filed Critical Amy Droitcour
Publication of WO2022159315A2 publication Critical patent/WO2022159315A2/en
Publication of WO2022159315A8 publication Critical patent/WO2022159315A8/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/415—Identification of targets based on measurements of movement associated with the target

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

This invention relates to devices that determine occupancy in a room. Previously, Motion-sensing occupancy sensors were ineffective when occupants were sedintary Embodiments of the present invention involve operating a RADAR based sensor to detect human movement in a room. Then receiving, by a processor, a baseband signal from the RADAR based sensor. After that, extracting, by the processor, a segment of the baseband signal. Following that, extracting, by the processor, a portion of the segment. Subsequently, applying, by the processor, a time-frequency spectral analysis to the extracted segment. Next, identifying, by the processor, a distribution of signal over frequencies and time in the extracted segment based on the time-frequency spectral analysis. Finally, determining, by the processor, a number of occupants present in the room based on parameters associated with the distribution of signal over frequencies and time.
PCT/US2022/012183 2020-11-12 2022-01-12 Building occupancy estimation using microwave doppler radar and time-frequency spectral analysis WO2022159315A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202063113066P 2020-11-12 2020-11-12
US63/113,066 2020-11-12
US202163152242P 2021-02-22 2021-02-22
US63/152,242 2021-02-22

Publications (2)

Publication Number Publication Date
WO2022159315A2 WO2022159315A2 (en) 2022-07-28
WO2022159315A8 true WO2022159315A8 (en) 2022-09-01

Family

ID=82548991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2022/012183 WO2022159315A2 (en) 2020-11-12 2022-01-12 Building occupancy estimation using microwave doppler radar and time-frequency spectral analysis

Country Status (1)

Country Link
WO (1) WO2022159315A2 (en)

Also Published As

Publication number Publication date
WO2022159315A2 (en) 2022-07-28

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