摘要:
A tracking system for tracking at least one mobile multi-function device in a defined area, including at least one mobile multi-function device adapted to move in the defined area. The multi-function devices including a transmitter and a device for determining the position of the device to transmit a signal including the determined position. A plurality of other multi-function devices are placed in and around the defined area to present an array of devices adapted to independently determine both the current position of the device and the accuracy of the position and communicate that to the other devices in the system using a mesh communication network. A signal processor receives the signals from the transmitters and calculate the position of the mobile multi-function device.
摘要:
A portable radio-frequency identifier (RFID) reading terminal can comprise a microprocessor, a memory, an RFID reading device, and a display. The portable EIR terminal can be configured, responsive to successfully reading a plurality of RFID tags attached to a plurality of items sustained by a physical structure, to group the plurality of read RFID tags into zero or more clusters, by correlating quantities of RFID tags read within several time periods to spatial positions of the coverage shapes of the RF signals transmitted by the RFID reading device during the several time periods. The EIR terminal can be further configured to determine the spatial positions of the RFID signal coverage shapes based on the spatial positions and orientations of the portable EIR terminal during the several time periods. The EIR terminal can be further configured to display a quantity of RFID tags within each cluster overlaid over an image.
摘要:
A portable radio-frequency identifier (RFID) reading terminal can comprise a microprocessor, a memory, an RFID reading device, and a display. The portable EIR terminal can be configured, responsive to successfully reading a plurality of RFID tags attached to a plurality of items sustained by a physical structure, to group the plurality of read RFID tags into zero or more clusters, by correlating quantities of RFID tags read within several time periods to spatial positions of the coverage shapes of the RF signals transmitted by the RFID reading device during the several time periods. The EIR terminal can be further configured to determine the spatial positions of the RFID signal coverage shapes based on the spatial positions and orientations of the portable EIR terminal during the several time periods. The EIR terminal can be further configured to display a quantity of RFID tags within each cluster overlaid over an image.
摘要:
A method of mapping the location of at least one object in three dimensional space, relative to an initial point in three dimensional space by an EIR terminal which contains a microprocessor, memory, a scanning device, a motion sensing device, and a communication interface. The method includes scanning a signal of decodable indicia located at a pre-defined area of a physical object, locating the decodable indicia within this signal, decoding the decodable indicia into a decoded message. The decoded message is an identifier for said physical object, which is then displayed. After receiving an interface command, the EIR terminal is placed in mechanical contact with the pre-defined area of the physical object and a first spatial position is stored as a point of origin in the EIR terminal.
摘要:
A system and method to detect PASS-type device audio alarm signals and to locate such devices in alarm in a public building, airport, sports stadium or other structure which can include a system to measure speech intelligibility. Time and frequency domain analysis are carried out to establish the pressure of PASS-type device audio output signals.
摘要:
A measurement system and method combine an audio announcement system with a plurality of spaced apart sensors to evaluate intelligibility of audio output from loudspeakers of the audio announcement system. Processing can take place at some or all of the sensors as well as at a common control element. Evaluations can be based on use of an appropriate speech intelligibility index method.
摘要:
A system and method for laser source detection. An exemplary embodiment of the system includes a first array of lenses, a second array of opto devices (including light sources and light detectors), and at least one processor. By positioning the array of lenses to determine the lens position at which energy from an incoming laser is greatest on the light detectors, the approximate location of the laser source may be determined. Upon determining the source, responsive action may be taken. If the incoming laser is from a friendly party, a friendly-party notification may be provided. If the incoming laser is from an enemy, reciprocal targeting or false reflections may be employed.
摘要:
A system and method automatically associate wireless devices to point names. An installation plan indicates that wireless devices are installed at designated locations. Each designated location in the installation plan includes an associated point name, each wireless device is configured to transmit a message indicating itself as the source of the message, and each wireless communication device is installed proximate to its designated location. Expected distances are determined between one or more pairs of designated locations on the installation plan. Range estimate data is gathered from the installed wireless devices for one or more pairs of the installed wireless devices. A unique identifier within a signal transmitted by one of the installed wireless devices is associated with a corresponding point name on the installation plan. The association is determined at least in part by the expected distances and the range estimate data.
摘要:
A system and method to detect and remediate unacceptable levels of speech intelligibility evaluates received test audio transmitted across and received in a space or region of interest. Intelligibility is improved by altering the rate, pitch, amplitude and frequency bands energy during presentation of the speech signal.
摘要:
A method of communication that includes transmitting a communication signal having a synchronization preamble from a first node. Setting a local clock of at least one second node pursuant to the synchronization preamble to synchronize communications between the first and at least one second node. Exchanging subsequent data communications between the first and at least one second node without additional preambles until a special switch point occurs and after the special switch point occurs, transmitting information that utilizes the period of reduced time-synchronization accuracy following data communication.