Abstract:
A first mobile device includes a location processor, a communication processor, and a display, and a second mobile device includes a location processor and a communication processor. The first mobile device is configured to wirelessly communicate with the second mobile device, and the first mobile device is configured to display a superimposed icon representing a location of the second mobile device as viewed from the perspective of the first mobile device when the first mobile device is pointed in the direction of the second mobile device.
Abstract:
A method of detecting motion in components that form part of a structure. The method includes flooding a first component with transmitted radio frequency signals and receiving reflected radio frequency signals from the first component with an antenna. The method further includes generating a first set of intermediate frequency signals based on differences between the transmitted radio frequency signals and the reflected radio frequency signals and measuring the first set of intermediate frequency signals. The method further includes flooding a second component with transmitted radio frequency signals and receiving reflected radio frequency signals from the second component with an antenna. The method further includes generating a second set of intermediate frequency signals based on differences between the transmitted radio frequency signals and the additional reflected radio frequency signals and measuring the second set of intermediate frequency.
Abstract:
Beacon generators transmit wireless beacon signals for use in tracking an object. Among other things, a wireless beacon signal from a particular beacon generator contains information identifying a power supply voltage associated with that beacon generator. A tracking device associated with the object receives one or more of the beacon signals. The tracking device measures the signal strength of a received beacon signal, and the tracking device identifies the power supply voltage associated with the beacon generator that transmitted the received beacon signal. The tracking device or an external component, such as a control unit, can use the identified signal strength and the identified power supply voltage to determine the location of the object. As a particular example, signal strengths and power supply voltages associated with at least three beacon signals can be used to identify the location of the object.
Abstract:
In one embodiment, a method of estimating location of a mobile beaconing device within a building includes steps: concurrently transmitting from the beaconing device at least first and second signals, which respectively indicates at least first and second transmit power levels thereof; receiving the at least first and second signals by a plurality of anchor devices at different known locations; estimating first distances between the beaconing device and each anchor device as a function of signal power levels of the first signal received by each anchor device, and second distances between the beaconing device and each anchor device as a function of signal power levels of the second signal received by each anchor devices; and calculating an estimated location of the beaconing device as a function of the estimated first distances and second distances.
Abstract:
A sensor assembly includes a sensor configured to detect at least one material or condition, such as a smoke detector, fire detector, or carbon monoxide detector. The sensor assembly also includes a base configured to be mounted on a structure, such as a wall or ceiling, and to receive the sensor. The sensor assembly further includes a wireless module located between the sensor and the base. The wireless module is configured to transmit position information. The wireless module may include one or more electrical contacts used to form at least one electrical connection between the base of the sensor assembly and the sensor. The wireless module may also include a printed circuit board having the contacts, wireless radio circuitry, an antenna, and other components. The printed circuit board could be substantially hidden from view when the sensor is attached to the base and the base is mounted on the structure.
Abstract:
A model-based system and method for analyzing power source performance and optimizing operational costs are provided. Data from the power source (such as a battery) and/or a device associated with the power source is analyzed and processed to predict an operating life of the power source. This could allow, for example, a power source replacement schedule to be generated for the device. If the analysis indicates that abnormal conditions exist or that any user-defined alerts are warranted, a message could also be sent to an operator terminal. The system and method may continue to monitor the device and thus provide real-time data. The data may also be stored in memory, collected over time, and analyzed or used in various ways. The system and method thus provide a cost effective and reliable analysis of power source performance and any associated operational and replacement costs.
Abstract:
A wireless bridge includes a first universal asynchronous receiver/transmitter (UART) for coupling to a serial bus that receives data packets. A protocol independent module has a timer set to a desired time to detect a start and/or an end of a data packet received from the serial bus. A wireless transceiver is coupled to the universal asynchronous receiver/transmitter for sending and receiving data packets.
Abstract:
A target radio can be located and tracked by an array of anchor radios. The anchor radios are calibrated when each anchor radio transmits an anchor message that is received by the other anchor radios. The distance between anchor radios is known because their positions are known. The received signal strengths are dependent on distance and an attenuation value. The calibration operation uses the received signal strengths and known anchor radio locations to determine the attenuation values of the anchor radios. After calibration, a target radio transmission can be received by the anchor radios. Each anchor radio estimates the distance to the target. The distance estimates and the anchor locations can then be used to determine the target radio's location.
Abstract:
A system for tracking persons and other objects in a structure in which a plurality of low power transmitter beacons send identifiers to any receiver within range of the beacons. The beacons are attached to the building at known locations that are used as reference points. The person or object carrying the receiver then uses the information of those beacons to determine the location in the structure of the receiver. The data can be sent to a command center or other monitoring location or it can be processed on site by the receiver.
Abstract:
A method for automatically estimating the spatial positions between cameras in a camera network utilizes unique identifying signals, such as RFID signals, transmitting between nearby cameras to estimate the relative distances or positions between cameras from received signal strength (RSS), time of arrival (TOA), or time difference of arrival (TDOA) measurements to thereby determine the neighboring relationship among the cameras. A discover-locate process can be used to discover, from the estimated relative distances, unknown cameras in the vicinity of at least three cameras at known locations. Absolute locations of the discovered unknown cameras can then be calculated using a geometric calculation. The discover-locate process can be cascaded throughout the network to discover and locate all unknown cameras automatically using previously discovered and located cameras. Such methods can be implemented in systems having cameras with transceivers integrated therein and a controller operably linked to the cameras.