A universal radio frequency identification reader and emulation handheld device and system configured to read and emulate radio frequency identification tags in the low frequency, high frequency, and ultra-high frequency spectrums (from 30 kHz to 1050 MHz). The system may include a mobile or a web application to control and interact with the handheld device. The system may allow for the saving of radio frequency identification tag information in cloud infrastructure for later emulation.

A transceiver device for receiving an interrogation signal at a first carrier frequency and for transmitting a response signal at a second carrier frequency is disclosed. The interrogation signal comprises the first carrier frequency modulated at the second carrier frequency. The communication device includes a sensor coupled to a demodulator. The sensor receives a low frequency input used to further modulate the interrogation signal. The demodulator demodulates the low frequency input from the first carrier frequency to thereby generate the response signal comprising the second carrier frequency and the low frequency input. The demodulator preferably includes a pyroelectric demodulator, a piezoelectric demodulator, or a detector diode. The demodulator preferably has a frequency response less than the first carrier frequency but greater than the second carrier frequency.

A universal radio frequency identification reader and emulation handheld device and system configured to read and emulate radio frequency identification tags in the low frequency, high frequency, and ultra-high frequency spectrums (from 30 kHz to 1050 MHz). The system may include a mobile or a web application to control and interact with the handheld device. The system may allow for the saving of radio frequency identification tag information in cloud infrastructure for later emulation.

A method of checking products is provided, which includes the following steps. The electronic device reads an electronic tag on an object by the tag reading module so as to obtain an object identification code which is corresponding to and provided on the electronic tag; the electronic device transmits the object identification code to a data management system; the data management system searches from the database whether an identification code of the product items is consistent with the object identification code; if the consistent identification code is not found, the data management system transmits a notification message to the electronic device whereby workers can be informed by the electronic device that the current object doesn't belong to the products corresponding to the product items so that it would be more convenient to check products.

A reading device includes a placing table supporting an article to which an RFID tag is attached. An antenna is configured to emit a radio wave for communicating with the RFID tag toward the placing table. A reading unit is configured to read tag information including a tag identifier identifying the RFID tag by communicating with the RFID tag via the antenna while the placing table and the antenna are integrally moved. An extracting unit is configured to extract a tag identifier in which an amount of change in phase information is a predetermined value or less, based on the phase information of a response wave obtained from the RFID tag when the tag information is read. An outputting unit is configured to output the tag information including the tag identifier extracted by the extracting unit.

A reading device includes a placing table supporting an article to which an RFID tag is attached. An antenna is configured to emit a radio wave for communicating with the RFID tag toward the placing table. A reading unit is configured to read tag information including a tag identifier identifying the RFID tag by communicating with the RFID tag via the antenna while the placing table and the antenna are integrally moved. An extracting unit is configured to extract a tag identifier in which an amount of change in phase information is a predetermined value or less, based on the phase information of a response wave obtained from the RFID tag when the tag information is read. An outputting unit is configured to output the tag information including the tag identifier extracted by the extracting unit.

A system and method for hands-free stock picking using radio frequency identification (RFID) includes a fixed RFID reader configured to interrogate RFID tags associated with inventory that is disposed on shelving, and an RFID barrier that is configured to substantially inhibit interrogation of RFID tags associated with active inventory on the shelving. The RFID reader receives responses from the replenishment inventory on the shelving which are tabulated. When an item is picked from the active inventory and moved away from the RFID barrier, the RFID reader receives an increased number of responses for that item compared to the tabulated inventory. The system then associates the picked item with the associated customer order.

RFID tags may compensate for non-RFID power sources by automatically enforcing data or state persistence even while powered. A tag may measure a time interval between successive detected modulated reader transmissions. If the interval exceeds a minimum time, then the tag may deassert a protocol flag, erase data, and/or change tag operating states, even if the tag would normally not perform these actions while powered.

Systems and methods of the present invention provide for storing a unique identifier for an RFID tag associated with, and affixed to, an asset. An RFID reader, coupled to a server computer through a network, executes firmware instructions causing the reader to receive a transmission from a server computer to run a customizable software with programmable logic at the reader. The reader then recognizes the tag according to its signal strength, and determines a tag state for the tag according to a state machine in the customizable software. If the tag state changes, the reader publishes the tag state and transmits it to the server computer using a low bandwidth solution.

A data storage device includes a reader/writer for communicating wirelessly with an radio-frequency (RF) tag and a memory storing parameters in association with characteristic information of the RF tag. The parameters are used in communicating wirelessly with the RF tag. A sensor is configured to obtain characteristic information of the RF tag. A processor acquires the characteristic information of the RF tag through the sensor and a parameter corresponding to the acquired characteristic information from the memory. The processor then communicates wirelessly with the RF tag through the reader/writer according to the acquired parameter.