A computerized safety tracking and proximity warning method and system for personnel, plant and equipment operating both above and below the ground and moving therebetween comprising a computer adapted to receive wireless position information from transponders carried or worn by personnel, and affixed to plant or equipment via one or more wireless communication protocols to provide a seamless visual display of their relative positions whether above or below ground level or moving therebetween, and wherein an alarm is triggered to alert an operator or worker if the locations of the personnel and plant or equipment are within a predetermined and unsafe distance of each other.

An interactive mobile robot system and a method for creating an invisible track for a mobile robot. The system and method allow the creation of invisible tracks by guiding objects. They also allow the use of such invisible tracks for the semi-autonomous or autonomous control of toys, including model cars and model trains, or of mobile robots to move them along a real-world path. The system includes a mobile robot, receiver circuitry to receive one or more position signals, and processing circuitry. The processing circuitry is configured to determine position information associated with the mobile robot based on the one or more position signals. The processing circuitry is further configured to create an invisible track based on the position information, to determine a current position of the mobile robot, and to generate control signals based on the current position of the mobile robot and the invisible track.

A method and system for positioning a mobile device in a predefined space using wireless signals transmitted by access points is disclosed. In an initial mapping stage, the predefined space is mapped to study the signal characteristics of positions in that space. Positions in the predefined space that are close to and receive signals from the same access points and have similar signal characteristics are grouped into clusters. Positioning of a mobile device in the predefined space is carried out in two stages. In the first positioning stage, the mobile device is assigned to one of the clusters. In a second positioning stage, the position of the mobile device is determined by applying a prediction method assuming that the assigned cluster is the new universe. Data from INS (Inertial Navigation System) sensors like accelerometers, gyroscopes and magnetometers are used to further refine the position.

A portable electronic device configured to function as an electronic identifier in a facility, a high security zone, an amusement park, a city, and a hotel, and to display an interactive graphical map of the facility, the high security zone when authorized, the amusement park, the city, and hotel facilities when authorized is disclosed, as well as a facility mapping and visitor tracking system with security zone map views, amusement park map views, and city map views, and a set of facility mapping and visitor tracking processes are disclosed.

A method of determining locations of tracking devices may include receiving a data ping from a tracking device, where the data ping may be sent in response to the tracking device detecting a predetermined sequence of movements indicating a logistic event from a plurality of predefined logistics events. The method may additionally include accessing a hierarchical logistics flow for the tracking device, where the hierarchical logistics flow may include an ordered sequential list of event sites through which the tracking device is likely to move. The method may further include assigning an event site from the ordered sequential list of event sites based on the logistic event and the hierarchical logistics flow.

Systems and methods for position tracking include at least three spatially separated radio-frequency (RF) sources of radio signals. Each RF source is disposed in an area at a location known to that RF source. Each RF source includes an RF transmitter configured to transmit radio signals that carry a unique identifier and the known location of that RF source. The position tracking system and method include at least one tag. Each tag is coupled to a different mobile object and includes a radio module with an RF receiver for receiving the radio signals transmitted by the at least three spatially separated RF sources. Each tag further includes memory and a processor that executes executable code stored in the memory to compute a range from that tag to each of the at least three RF sources and to compute a position of that tag based on at least three computed ranges.

An RF position tracking system for wirelessly tracking the three-dimensional position of a tracked object. The tracked object has at least one mobile antenna and at least one inertial sensor. The system uses a plurality of base antennas which communicate with the mobile antenna using radio signals. The tracked object also incorporates the inertial sensor to improve position stability by allowing the system to compare position data from radio signals to data provided by the inertial sensor.

Methods, devices, and systems for tracking an asset are provided. In particular, a device is provided that includes an array of sensors and communications modules configured to detect tracking information, including environmental conditions and physical events, and report the tracking information along with a geographical location of the device to a control server across a wireless network. Upon receiving the tracking information, the control server interprets the information and generates tracking reports for the device configured to be displayed to a graphical user interface of a third-party communication device.

An electronic device includes an indoor positioner and a positioning engine server. The indoor positioner has an array antenna to receive a wireless signal from user equipment, and to calculate the angle of arrival (AOA) of the wireless signal according to the phase difference and the time difference. The wireless signal includes status data of the user equipment. The positioning engine server converts the angle of arrival into a set of coordinates that correspond to a position of the user equipment, and inputs the set of coordinates to an IMM module. The IMM module includes a first state module and a second state module. The IMM module calculates weighting values for the first state module and the second state module according to the status data of the user equipment, and outputs an estimated set of coordinates according to the set of coordinates and the weighting values.

The invention relates to a locating method for localizing at least one object using wave-based signals, wherein a wave field emanates from the object to be localized and the wave field emanating from the object is received by a number N of receivers, at least one measurement signal is formed in every receiver, said measurement signal being dependent on the spatial and temporal distribution of the wave field and the phase progression of said measurement signal being characteristically influenced by the signal propagation time from the object to the receiver, wherein, for position locating, phase values for each of the at least two measurement signals are taken as measured phase values, and wherein the current position (P(k)) of the object to be located at the time k is determined by a comparison of at least one linear combination of the measured phase values with at least one linear combination of the associated hypothetical phase values, which result from the transmitter-receiver distance(s), and using a recursive filter/estimator.