摘要:
Various methods for wireless signal storage with signal recognition detection triggering are provided. One method may include receiving a plurality of wireless signals via a plurality of frequency channels, storing representations of the plurality of wireless signals in a signal buffer, and receiving a trigger request for a signal of interest. In this regard, the trigger request may have been generated based on an analysis of at least one wireless signal within the plurality of wireless signals to thereby identify the signal of interest. The method may also include retrieving a representation of the signal of interest from the signal buffer based on the trigger request, and analyzing the retrieved representation of the signal of interest with associated signal characteristics to determine a location of a source of the signal of interest. Similar apparatuses and computer program products are also provided.
摘要:
A system determines the entry or exit lane of vehicles passing through a vehicle gate that has a plurality of vehicle lanes through which vehicles enter or exit. A tag interrogator is positioned at a predetermined location of the vehicle gate and emits a signal containing a tag interrogator ID. A plurality of the vehicles lanes are within range to receive that signal. A tag transmitter is mounted on a vehicle that enters or exits the gate and receives the signal emitted from the tag interrogator, which determines the Received Signal Strength Indication (RSSI) and in response, transmits an RE signal containing the tag interrogator ID and the RSSI for determining which vehicle lane the vehicle is located based on the tag interrogator ID and RSSI.
摘要:
A system tracks vehicles within a terminal and includes at least one tag interrogator mounted on a vehicle to be identified and tracked within the terminal. The tag interrogator is operative for emitting a signal containing data identifying the vehicle to which the tag interrogator is mounted. At least one tag transmitter is fixed at a known location within the terminal where vehicles are to be identified and receptive to a tag interrogator on the vehicle when the vehicle passes within proximity to the fixed tag transmitter for transmitting a wireless RF signal having data identifying the tag transmitter and identifying the tag interrogator as an identifier for the vehicle to which the tag interrogator is mounted. At least one access point is positioned at the terminal for receiving the RF signal from the tag transmitter for subsequent processing to verify vehicle identity at the known location.
摘要:
A tag mounting device can temporarily mount a tag transmitter on a shipping container or trailer for tracking location of the shipping container or trailer. The tag mounting device includes a mounting frame having a support leg with opposing ends. A clamp mechanism is carried by the support leg for clamping the support leg onto a rim of a container or trailer such that the support leg extends against a surface of the container or trailer. A tag support member extends outward from the support leg. A tag transmitter is carried by the tag support member and operative for transmitting wireless signals to at least one receiver for subsequent processing to determine the location of the tag transmitter and a container or trailer on which the tag mounting device is mounted.
摘要:
A system for tracking cargo containers contained within a terminal includes a tag transmitter adapted to be positioned on container handling equipment and operative for transmitting a wireless RF signal based on an event affecting the location of a container handled by the container handling equipment. A plurality of spaced apart access points are positioned at known locations within the terminal that receive the wireless RF signals from the tag transmitter. A processor is operatively connected to the locating access points for geolocating the tag transmitter and determining the container location at the time the event occurs.
摘要:
Magnetic field-based communication with an object is enhanced by generating a rotating AC magnetic field that effectively ensures magnetic field coupling with the magnetic field sensor of the object, irrespective of the orientation of the object. The rotating AC magnetic field is produced by a diverse spatial orientation (a two-dimensional arrangement) of a plurality of magnetic field coils, and the driving of those coils in a prescribed phase relationship (e.g., in phase quadrature) to realize a composite AC magnetic field that rotates (at the carrier frequency of the coil drive signal) over the entirety of the spatial coverage area.
摘要:
A system and method optimizes throughput of tracked assets as work-in-progress (WIP) within a monitored environment such as a manufacturing establishment with off-line processing areas. A plurality of assets such as vehicles have a tag transmitter associated therewith and operative for transmitting a wireless RF signal that includes data relating to the identification of the asset to which the tag transmitter is associated. A real-time location system (RTLS) infrastructure tracks the location of the plurality of assets to various containment, staging, and processing task areas within the monitored environment as WIP. A processor is operative with the RTLS infrastructure for determining an asset input rate into WIP at an origin to the WIP for optimizing asset flow rate as WIP through different containment, staging, and processing areas within the monitored environment.
摘要:
A system of the present invention is operative for locating a wireless mobile device in communication with a wireless local area network (WLAN) that includes a plurality of cells defining a wireless local area network each having an access point base station. The access point base stations communicate with wireless mobile devices using wireless communication signals as typically spread spectrum communication signals. A processor is operatively connected to each of the access point base stations and operative to process communication signals transmitted from a mobile device and determine which signals are first-to-arrive signals based on a common timing signal and conduct differentiation of the first-to-arrive signals to locate the mobile device.
摘要:
A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals within a wireless local area network. A processor is operatively connected to each of the access point stations and operative for processing communication signals received from the mobile station and, in one embodiment, determining which communication signals are first-to-arrive signals and conducting differentiation of the first-to-arrive signals to locate a mobile station. Delayed versions of at least one interference signal are weighted and the amplitude and phase controlled with weighted functions W1, W2 . . . Wn. The resultant weighted replicas are summed to determine an approximation of disbursed interference for cancelling interference. The location system can include a tag transmitter and spaced monitoring receivers and processor.
摘要:
A system of the present invention is operative for locating a wireless mobile device in communication with a wireless local area network (WLAN) that includes a plurality of cells defining a wireless local area network each having an access point base station. The access point base stations communicate with wireless mobile devices using wireless communication signals as typically spread spectrum communication signals. A processor is operatively connected to each of the access point base stations and operative to process communication signals transmitted from a mobile device and determine which signals are first-to-arrive signals based on a common timing signal and conduct differentiation of the first-to-arrive signals to locate the mobile device.