US 11,988,739 B2
Area-selective radar detection
Ugo Bertacchini, Brescia (IT); Alessio Degani, Brescia (IT); and Andrea Tartaro, Brescia (IT)
Assigned to Inxpect S.p.A., Brescia (IT)
Filed by Inxpect S.p.A., Brescia (IT)
Filed on Jul. 13, 2021, as Appl. No. 17/373,880.
Claims priority of application No. 102020000017365 (IT), filed on Jul. 16, 2020.
Prior Publication US 2022/0018952 A1, Jan. 20, 2022
Int. Cl. G01S 13/88 (2006.01); G01S 13/56 (2006.01)
CPC G01S 13/888 (2013.01) [G01S 13/56 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of radar detection of targets in an environment, comprising:
cyclically transmitting and receiving radar signals in a protected area,
processing the radar signals to cyclically obtain a detection profile that associates with each position in the protected area an amount of radar signal that has been reflected,
splitting the protected area into one or more first areas and one or more second areas, by selecting as first area at least a portion of the protected area in which motionless targets are present, and selecting as second area at least a portion of the protected area in which motionless targets are not present,
after splitting the protected area, running a first series of cycles and a second series of cycles following the first series of cycles,
running a first movement detection mode during the first series of detection cycles and not during the second series of cycles, the first movement detection mode being configured to trigger a target alarm upon detecting targets in the one or more first areas and the one or more second areas of the protected area, after eliminating a part of the detection profile, the first movement detection mode being insensitive to motionless targets and sensitive to dynamic targets that move between different locations in the protected area,
as a moving target is detected within the protected area, ending the first series of detection cycles and starting the second series of cycles,
running a second movement detection mode during the second series of detection cycles and not during the first series of cycles, the second movement detection mode being configured to trigger a target alarm upon detecting targets in the one or more first areas and not in the one or more second areas,
a presence detection mode during the second series of detection cycles and not during the first series of cycles, the second movement detection mode being configured to trigger a target alarm upon detecting targets in the one or more second areas and not in the one or more first areas,
wherein the second movement detection mode is configured to detect targets in the one or more first areas after eliminating a part of the detection profile, to be insensitive to motionless targets and sensitive to dynamic targets,
wherein the presence detection mode comprises
detecting motionless and dynamic targets in each second area based on entire detection profile,
ending the second series of detection cycles and restarting the first series of detection cycles when the second movement detection mode and the presence detection mode do not detect targets for a predetermined number of successive second cycles.