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公开(公告)号：US11747462B1
公开(公告)日：2023-09-05
申请号：US16703310
申请日：2019-12-04
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Riccardo DeSalvo , Giuseppe Castaldi , Andrea Cusano , Vincenzo Galdi , Paolo Mattera , Roberto Parente , Fereydoun Daneshgaran , Joseph Minh Tien , Dustin Jeffery Gordon Krogstad
CPC classification number: G01S13/584 , G01S13/89 , G06F3/011 , G06T19/006 , G06V20/20
Abstract: The disclosed radar system may include a radar mechanism comprising a transmitter and at least one receiver. The radar system may also include a signal generator that generates a frequency-modulated radar signal. In addition, the radar system may include at least one frequency multiplier that, after multiplying a frequency of the frequency-modulated radar signal by a certain factor, synchronously passes the frequency-modulated radar signal to (1) the transmitter to be transmitted to at least one transponder located on a wearable device and (2) a processing device communicatively coupled to the receiver. The processing device may (1) detect a signal returned to the receiver from the transponder in response to the frequency-modulated radar signal and (2) calculate a distance between the transponder and the receiver based at least in part on an analysis of the signal returned from the transponder and the frequency-modulated radar signal received from the frequency multiplier.
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2.发明授权公开(公告)号：US11650306B1
公开(公告)日：2023-05-16
申请号：US16526739
申请日：2019-07-30
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Riccardo DeSalvo , Giuseppe Castaldi , Andrea Cusano , Vincenzo Galdi , Paolo Mattera , Roberto Parente , Fereydoun Daneshgaran , Joseph Minh Tien , Dustin Krogstad
Abstract: The disclosed computer-implemented method may include transmitting, by at least one radar device, to at least one transponder located within a physical environment surrounding a user, a frequency-modulated radar signal that has a first type of polarization, and receiving, by the at least one radar device, signals that have a second type of polarization, the second type of polarization being different than the first type of polarization, detecting, by a processing device communicatively coupled to the at least one radar device, a signal that has the second type of polarization and was returned to the at least one radar device from the at least one transponder in response to the frequency-modulated radar signal, and calculating, by the processing device, a distance between the at least one transponder and the at least one radar device. Various other methods, systems, and computer-readable media are also disclosed.
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公开(公告)号：US11454700B1
公开(公告)日：2022-09-27
申请号：US16836663
申请日：2020-03-31
Applicant: Meta Platforms Technologies, LLC
Inventor： Riccardo DeSalvo , Giuseppe Castaldi , Andrea Cusano , Vincenzo Galdi , Paolo Mattera , Roberto Parente , Fereydoun Daneshgaran , Joseph Minh Tien , Dustin Jeffery Gordon Krogstad , Omar Mikhail Ilagan Perez
Abstract: A radar system may include (1) a wearable device, (2) a set of radar devices secured to the wearable device, wherein the set of radar devices (A) transmit radar signals to at least one transponder and (B) receive the radar signals, (3) an error-mitigation device secured to the wearable device, wherein the error-mitigation device provides data for mitigating position errors in triangulation calculations involving the radar signals, and (4) at least one processing device communicatively coupled to the set of radar devices and the error-mitigation device, wherein the processing device (A) calculates, based at least in part on roundtrip flight times of the radar signals and the data, distances between the set of radar devices and the transponder and (B) triangulates, based at least in part on the distances, a three-dimensional location of the transponder relative to the wearable device. Various other apparatuses, systems, and methods are also disclosed.
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公开(公告)号：US11474227B1
公开(公告)日：2022-10-18
申请号：US16515067
申请日：2019-07-18
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Riccardo DeSalvo , Giuseppe Castaldi , Andrea Cusano , Vincenzo Galdi , Paolo Mattera , Roberto Parente , Fereydoun Daneshgaran , Joseph Minh Tien , Dustin Krogstad
IPC: G01S13/42 , G06F3/01 , G06K19/07 , G06K19/077 , G06T19/00
Abstract: The disclosed apparatus may include at least one transponder that (1) is located on a wearable device worn by a user and (2) retransmits signals received at the transponder after shifting frequencies of the received signals to a certain frequency range. The apparatus may also include at least one radar device that (1) transmits a frequency-modulated radar signal to the transponder and (2) receives signals whose frequencies are within the certain frequency range. In addition, the apparatus may include a processing device that (1) detects a signal returned to the radar device from the transponder, (2) calculates, based on the returned signal, a distance between the transponder and the radar device, and then (3) determines, based on the distance between the transponder and the radar device, a current physical location of at least a portion of the user. Various other apparatuses, systems, and methods are also disclosed.
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