公开(公告)号：US11914025B1

公开(公告)日：2024-02-27

申请号：US18365823

申请日：2023-08-04

申请人： Density, Inc.

发明人： Andrew Farah ,  Casey Kelso ,  Christian Ayerh ,  John Shanley ,  Robert Grazioli ,  Benjamin Redfield ,  Garrett Bastable ,  Brian Weinreich ,  Kyle Hay

IPC分类号： G01S13/72 ,  G01S7/35

CPC分类号： G01S13/72 ,  G01S7/352

摘要： A plurality of positional sensing devices are situated at regular intervals within an environment and collect data for tracking objects moving within the environment. Phase shift of modulated Doppler pulses reflected from the sensing devices to objects are measured and converted into positional data indicating positions of detected objects within the environment. Associated timestamp data is also collected by the positional sensing devices. The positional data and associated timestamp data is aggregated from the plurality of positional sensors, and the aggregated positional data and is clustered to determine point clouds which are associated with the detected objects. The clusters are tracked by tracklets that track the position of each cluster over time. Trajectories for each detected object are determined by connecting tracklets together that are associated with the same detected object.

公开(公告)号：US11776342B1

公开(公告)日：2023-10-03

申请号：US17551560

申请日：2021-12-15

申请人： Density Inc.

发明人： Andrew Farah ,  Casey Kelso ,  Brian Weinreich ,  Benjamin Redfield ,  Garrett Bastable ,  Matthew Merati ,  Siu Kwong Mok

IPC分类号： G07C9/28 ,  G01S7/48 ,  G06V40/20 ,  G01S17/04 ,  G06V20/52 ,  G06K7/10

CPC分类号： G07C9/28 ,  G01S7/4802 ,  G01S17/04 ,  G06K7/10366 ,  G06V20/53 ,  G06V40/23

摘要： A depth sensing device, situated above a threshold to a room, collects asynchronous, non-personally-identifiable data regarding a count of people entering and exiting across the threshold. Phase shift of modulated infrared light reflected from a light source to an object is measured and converted into depth data indicating the depth of the pixels therein. The depth data is used to classify detected objects as human, and to track their movement bi-directionally through the threshold. A running count of humans entering or exiting the room is streamed to a remote server, which aggregates data collected from a number of depth sensing devices. The server then makes that data available at various levels of visualization corresponding to different levels of a hierarchy of nested virtual spaces, such as a multi-entrance room, or a building. Entities that access this data may see a real-time, accurate count of humans currently occupying the virtual space, as well as historical data.

公开(公告)号：US11227458B1

公开(公告)日：2022-01-18

申请号：US16844749

申请日：2020-04-09

申请人： Density Inc.

发明人： Andrew Farah ,  Casey Kelso ,  Brian Weinreich ,  Benjamin Redfield ,  Garrett Bastable ,  Matthew Merati ,  Siu Kwong Mok

IPC分类号： G06K5/00 ,  G07C9/28 ,  G06K9/00 ,  G01S7/48 ,  G06K7/10 ,  G01S17/04

摘要： A depth sensing device, situated above a threshold to a room, collects asynchronous, non-personally-identifiable data regarding a count of people entering and exiting across the threshold. Phase shift of modulated infrared light reflected from a light source to an object is measured and converted into depth data indicating the depth of the pixels therein. The depth data is used to classify detected objects as human, and to track their movement bi-directionally through the threshold. A running count of humans entering or exiting the room is streamed to a remote server, which aggregates data collected from a number of depth sensing devices. The server then makes that data available at various levels of visualization corresponding to different levels of a hierarchy of nested virtual spaces, such as a multi-entrance room, or a building. Entities that access this data may see a real-time, accurate count of humans currently occupying the virtual space, as well as historical data.