摘要:
Representative implementations of devices and techniques provide multipath interference cancelling for imaging devices and systems. In various implementations, structured light is used to diminish, if not cancel interference. For example, the light may be structured with respect to amplitude or phase, based on an emission angle of the light.
摘要:
Embodiments provide an RFID reader. The RFID reader includes a collision detector, a decoder and a frame length adjuster. The collision detector is configured to detect for each slot of a plurality of slots of a current frame, in which a collision of signals transmitted by at least two RFID tags occurred, a signal property of a signal of the signals transmitted by at least two RFID tags. The decoder is configured to decode for the slot in which the collision is detected the signal of the signals transmitted by the at least two RFID tags using the detected signal property, wherein a collision recover probability describing a probability that the decoder can accurately decode the one signal depends on a signal-to-noise ratio (SNR) of the current frame. The frame length adjuster is configured to adjust a frame length of a subsequent frame in dependence on the collision recover probability.
摘要:
A wire cart has a plurality of shelving assemblies, each of which has an RFID antenna. The wire cart also has a controller that controls the RFID antennas and an actuator to activate the controller. The wire cart has an open side. The RFID antennas and control component are configured to limit the field of detection such that an RFID tag located substantially outside of the open side is excluded from detection.
摘要:
In one or more embodiments described herein, there is provided an apparatus that is configured to determine respective signal strengths of radio frequency identification signalling received from multiple sources by a directional antenna. The apparatus is also configured to discriminate the radio frequency identification signalling from a particular source based on the particular signal strength of the radio frequency identification signalling received from that source.
摘要:
An RFID system includes an RFID antenna assembly configured to be positioned on a product module assembly of a processing system. The product module assembly is configured to releasably engage at least one product container. A first RFID tag assembly configured to be positioned on the at least one product container. The at least one product container is configured to position the first RFID tag assembly within a detection zone of the RFID antenna assembly whenever the product module assembly releasably engages the at least one product container.
摘要:
A radio wave control apparatus includes a detecting unit that detects an object, other than a communication target device, in a radiation range to which a radio wave radiating unit radiates predetermined radio waves in each of a plurality of radiation directions; and a radiation range determining unit that determines a radiation range in each of the radiation directions such that the predetermined radio waves are radiated over a predetermined communication range, in which the communication target device is communicable using the predetermined radio waves, and no no-communication area that is caused when the predetermined radio waves reflected on the object is caused in the communication range.
摘要:
A system including a detector, a reader, and a tag. The detector includes a sensor to detect a user event, and a communication circuitry to communicate at a first frequency band. The reader includes communication circuitry to communicate at a second frequency band. The tag includes a first communication circuitry to communicate at the first frequency band and a second communication circuitry to communicate at the second frequency band. The detector is to communicate with the tag via the communication circuitry of the detector. The detector is to determine whether to associate the tag with the user event. The detector is to communicate the determined association. The tag is to communicate using the second communication circuitry of the tag with the reader.
摘要:
An RFID system includes an RFID antenna assembly configured to be positioned on a product module assembly of a processing system. The product module assembly is configured to releasably engage at least one product container. A first RFID tag assembly configured to be positioned on the at least one product container. The at least one product container is configured to position the first RFID tag assembly within a detection zone of the RFID antenna assembly whenever the product module assembly releasably engages the at least one product container.
摘要:
A media processing apparatus includes a self-calibrating encoding assembly that send read/write inquires to determine appropriate power levels for encoding encodable objects. The apparatus includes a control subsystem that tracks the power levels of the encoding assembly and the corresponding positions of media carrying the encodable objects. The controller then determines an encoding window and an encoding power level at which the encoding assembly encodes an encodable object in the encoding power window without unwanted communication to encodable objects outside of the window.
摘要:
High density read chambers are provided for scanning and/or encoding a plurality of RFID tagged items. Such chambers may include an enclosure with an interior defined by upper and lower surfaces, with a sidewall extending therebetween. An access (such as a door) may be associated with at least one of the surfaces or the sidewall, with the access being at least partially opened to access the interior of the enclosure from an outside location. The chamber further includes an antenna positioned within the interior of the enclosure and an RFID reader associated with the antenna. The RFID reader receives signals from and/or transmits signals to the antenna, while the antenna emits a scanning or encoding signal within the interior of the enclosure, with at least a portion of at least one of the surfaces or the sidewall including a signal-reflective material facing the interior of the enclosure.