公开(公告)号：US20180321043A1

公开(公告)日：2018-11-08

申请号：US16022526

申请日：2018-06-28

Applicant: TRX SYSTEMS, INC.

Inventor： Kamiar Kordari ,  Benjamin Funk ,  Carole Teolis ,  Jared Napora ,  John Karvounis ,  Dan Hakim ,  Christopher Giles ,  Carol Politi

IPC: G01C21/20

CPC classification number: G01C21/206

Abstract: This disclosure provides techniques for the creation of maps of indoor spaces. In these techniques, an individual or a team with no mapping or cartography expertise can contribute to the creation of maps of buildings, campuses or cities. An indoor location system can track the location of contributors in the building. As they walk through indoor spaces, an application may automatically create a map based on data from motion sensors by both tracking the location of the contributors and also inferring building features such as hallways, stairways, and elevators based on the tracked contributors' motions as they move through a structure. With these techniques, the process of mapping buildings can be crowd sourced to a large number of contributors, making the indoor mapping process efficient and easy to scale up.

公开(公告)号：US10088313B2

公开(公告)日：2018-10-02

申请号：US15677897

申请日：2017-08-15

Applicant: TRX SYSTEMS, INC.

Inventor： Travis Young ,  John Riley Miller ,  John Karvounis ,  Dan Hakim ,  Jared Napora ,  Benjamin Funk ,  Carole Teolis

IPC: G01C17/38 ,  G01S5/02 ,  G01S19/42

Abstract: A method for computing a correction to a compass heading for a portable device worn or carried by a user is described. The method involves determining a heading for the device based on a compass reading, collecting data from one or more sensors, determining if the device is indoors or outdoors based on the collected data, and correcting the heading based on the determination of whether the device is indoors or outdoors.

公开(公告)号：US20160195391A1

公开(公告)日：2016-07-07

申请号：US14714216

申请日：2015-05-15

Applicant: TRX Systems, Inc.

Inventor： Travis Young ,  John Miller ,  John Karvounis ,  Dan Hakim ,  Jared Napora ,  Benjamin Funk ,  Carole Teolis

IPC: G01C17/38 ,  G01S19/42 ,  G01S5/02 ,  G01J1/42

CPC classification number: G01C17/38 ,  G01S5/0247 ,  G01S5/0252 ,  G01S5/0278 ,  G01S19/42

Abstract: A method for computing a correction to a compass heading for a portable device worn or carried by a user is described. The method involves determining a heading for the device based on a compass reading, collecting data from one or more sensors, determining if the device is indoors or outdoors based on the collected data, and correcting the heading based on the determination of whether the device is indoors or outdoors.

Abstract translation: 描述了一种用于计算由用户佩戴或携带的便携式设备的罗盘方向的校正的方法。 该方法包括基于罗盘读数来确定设备的标题，从一个或多个传感器收集数据，基于收集的数据确定设备是否在室内或室外，以及基于确定设备是否是 室内或室外

公开(公告)号：US11199412B2

公开(公告)日：2021-12-14

申请号：US16022526

申请日：2018-06-28

Applicant: TRX SYSTEMS, INC.

Inventor： Kamiar Kordari ,  Benjamin Funk ,  Carole Teolis ,  Jared Napora ,  John Karvounis ,  Dan Hakim ,  Christopher Giles ,  Carol Politi

IPC: G01C21/20

Abstract: This disclosure provides techniques for the creation of maps of indoor spaces. In these techniques, an individual or a team with no mapping or cartography expertise can contribute to the creation of maps of buildings, campuses or cities. An indoor location system can track the location of contributors in the building. As they walk through indoor spaces, an application may automatically create a map based on data from motion sensors by both tracking the location of the contributors and also inferring building features such as hallways, stairways, and elevators based on the tracked contributors' motions as they move through a structure. With these techniques, the process of mapping buildings can be crowd sourced to a large number of contributors, making the indoor mapping process efficient and easy to scale up.

公开(公告)号：US10012502B2

公开(公告)日：2018-07-03

申请号：US15592004

申请日：2017-05-10

Applicant: TRX SYSTEMS, INC.

Inventor： John Karvounis ,  Jared Napora ,  Benjamin E. Funk ,  Dan Hakim ,  Christopher Giles ,  Carole Teolis

IPC: G01C5/00 ,  G01C5/06 ,  G01C21/20

CPC classification number: G01C5/06 ,  G01C5/00 ,  G01C21/206

Abstract: Methods and systems are described for determining the elevation of tracked personnel or assets (trackees) that can take input from mounted sensors on each trackee (including barometric, inertial, magnetometer, radio frequency ranging and signal strength, light and GPS sensors), external constraints (including ranging constraints, feature constraints, and user corrections), and terrain elevation data. An example implementation of this method for determining elevation of persons on foot is described. But this method is not limited to computing elevation of personnel or to on foot movements.

公开(公告)号：US09823068B2

公开(公告)日：2017-11-21

申请号：US15040996

申请日：2016-02-10

Applicant: TRX Systems, Inc.

Inventor： John Karvounis ,  Jared Napora ,  Dan Hakim ,  Carole Teolis ,  John Riley Miller ,  Benjamin E. Funk

IPC: G01C5/06

CPC classification number: G01C5/06

Abstract: A method for determining an environmental pressure change affecting a pressure sensor within a portable device to determine an elevation of the portable device is disclosed. The method involves estimating a location of the mobile device, estimating an atmospheric pressure associated with the mobile device at a server based on data indicative of atmospheric pressure received from the mobile device, and generating the elevation of the mobile device based on the atmospheric pressure associated with the mobile device and reference data indicative of an absolute elevation reference. The absolute elevation determined may be based on the estimated location of the mobile device and elevation data obtained from a reference map.

公开(公告)号：US09739635B2

公开(公告)日：2017-08-22

申请号：US13915998

申请日：2013-06-12

Applicant: TRX Systems, Inc.

Inventor： Benjamin E. Funk ,  Dan Hakim ,  John Karvounis ,  Travis Young ,  Carole Teolis

IPC: G01C25/00 ,  G01C17/38

CPC classification number: G01C25/00 ,  G01C17/38

Abstract: Methods for calibrating a body-worn magnetic sensor by spinning the magnetic sensor 360 degrees to capture magnetic data; if the spin failed to produce a circle contained in an x-y plane fit a sphere to the captured data; determining offsets based on the center of the sphere; and removing the offsets that are in the z-direction. Computing a magnetic heading reliability of a magnetic sensor by determining an orientation of the sensor at one location; transforming the orientation between two reference frames; measuring a first vector associated with the magnetic field of Earth at the location; processing the first vector to generate a virtual vector when a second location is detected; measuring a second vector associated with the magnetic field of Earth at the second location; and calculating the magnetic heading reliability at the second location based on a comparison of the virtual vector and the second vector.

公开(公告)号：US09322648B1

公开(公告)日：2016-04-26

申请号：US14714209

申请日：2015-05-15

Applicant: TRX Systems, Inc.

Inventor： John Karvounis ,  Jared Napora ,  Dan Hakim ,  Carole Teolis ,  John Riley Miller ,  Benjamin E. Funk

IPC: G01C5/06

CPC classification number: G01C5/06

Abstract: A method for determining an environmental pressure change affecting a pressure sensor within a portable device to determine an elevation of the portable device is disclosed. The method involves sampling pressure data from at least one stationary pressure sensor in an area surrounding a location of the device, wherein the stationary pressure sensor in not within the portable device. The sampled pressure data is then interpolated to a time interval and a difference is computed between the interpolated pressure data over each time interval to determine a differential pressure. The location of the stationary pressure sensor is determined and the differential pressure is added to a pressure map affecting data near the location. The environmental pressure change is then computed over any interval at the location and subtracted from a pressure measurement of the pressure sensor before computing an elevation of the portable device.

Abstract translation: 公开了一种用于确定影响便携式设备内的压力传感器以确定便携式设备的高度的环境压力变化的方法。 该方法包括从围绕设备的位置的区域中的至少一个固定压力传感器采样压力数据，其中固定压力传感器不在便携式设备内。 然后将采样的压力数据内插到时间间隔，并且在每个时间间隔之间的内插压力数据之间计算差以确定差压。 确定固定压力传感器的位置，并将压差加到影响位置附近的数据的压力图上。 然后在该位置的任何间隔上计算环境压力变化，并在计算便携式设备的高程之前从压力传感器的压力测量中减去该压力变化。

公开(公告)号：US20140278080A1

公开(公告)日：2014-09-18

申请号：US14212529

申请日：2014-03-14

Applicant: TRX Systems, Inc.

Inventor： Benjamin Funk ,  Dan Hakim ,  John Karvounis ,  Carole Teolis

IPC: G01C21/16

CPC classification number: G01C21/165 ,  G01C21/08

Abstract: Methods, systems, and computer readable storage media are presented for directional scaling of inertial path data to satisfy ranging constraints. The presented techniques take into account scaling confidence information. In addition to bounding potential scale corrections based on the reliability of the inertial path and the magnetic heading confidence, the techniques bound potential scale parameters based on constraints and solve for directional scale parameters.

Abstract translation: 呈现方法，系统和计算机可读存储介质用于方向缩放惯性路径数据以满足测距约束。 所提出的技术考虑到置信信息的扩展。 除了基于惯性路径的可靠性和磁标题置信度的边界潜在尺度校正之外，这些技术基于约束约束了潜在的尺度参数，并且解决了定向尺度参数。

公开(公告)号：US10393542B2

公开(公告)日：2019-08-27

申请号：US15647004

申请日：2017-07-11

Applicant: TRX SYSTEMS, INC.

Inventor： Benjamin E. Funk ,  Dan Hakim ,  John Karvounis ,  Travis Young ,  Carole Teolis

IPC: G01C25/00 ,  G01C17/38

Abstract: Methods for calibrating a body-worn magnetic sensor by spinning the magnetic sensor 360 degrees to capture magnetic data; if the spin failed to produce a circle contained in an x-y plane fit a sphere to the captured data; determining offsets based on the center of the sphere; and removing the offsets that are in the z-direction. Computing a magnetic heading reliability of a magnetic sensor by determining an orientation of the sensor at one location; transforming the orientation between two reference frames; measuring a first vector associated with the magnetic field of Earth at the location; processing the first vector to generate a virtual vector when a second location is detected; measuring a second vector associated with the magnetic field of Earth at the second location; and calculating the magnetic heading reliability at the second location based on a comparison of the virtual vector and the second vector.