摘要:
A sensor value acquiring method employed in a computer, comprising: acquiring a sensor value obtained by a sensor included in each terminal from the terminals; storing the acquired sensor value along with an identifier used to identify each terminal; differentiating the stored sensor values, each of the stored sensor value corresponding to a different identifier and obtaining differences through the differentiating; extracting identifiers corresponding to the differences each of which is equal to or smaller than a threshold value; instructing at least one of the terminals corresponding to the extracted identifier to acquire a corresponding sensor value; and transmitting an instruction for extending a sensor value acquisition interval to the terminals which are other than the at least of terminals corresponding to the extracted identifier.
摘要:
An active contactless information storage device includes: an operation controller that determines whether mode information of the active contactless information storage device indicates a mode in which the device communicates with a reader/writer device; a carrier-sense controller that determines whether a first frequency in a first period and determines whether a second frequency in a second period, when the mode information of the active contactless information storage device indicates the mode in which the device communicates with the reader/writer device; and a command processor that performs communication with the reader/writer device when the carrier sense controller determines that the first frequency is sensed; wherein, when the mode information of the active contactless information storage device does not indicate the mode in which the active contactless information storage device communicates with the reader/writer device, the carrier-sense controller waits for a predetermined amount of time.
摘要:
An RFID tag that communicates information with an RFID reader/writer includes a receiving unit that receives ID information; a memory unit that stores the ID information; a table that stores a correspondence relation between a change in the ID information and a moving direction; a determining unit that refers to the table to determine a moving direction from ID information received by the receiving unit and previously received ID information stored in the memory unit; and a signal generating unit that sends an interruption signal to a control unit driven by electric power supplied from a battery when the moving direction is determined by the determining unit, and stops generating the interruption signal when the moving direction is not determined by the determining unit.
摘要:
An information processing apparatus includes an acquiring unit configured to receive signals, which are transmitted from a fixed station, including identification information for identifying the fixed station, measure receive signal strength indications of the received signals, and acquire position information indicating positions at which the receive signal strength indications are measured, the receive signal strength indications, and the identification information in association with each other; and a gain/attenuation rate calculating unit configured to calculate correction information including a transmission antenna gain in a specific direction from the fixed station and an attenuation rate in a propagation path, the correction information being obtained from the receive signal strength indication measured at a first distance in the specific direction from the fixed station and the receive signal strength indication measured at a second distance in the specific direction that is different from the first distance.
摘要:
A judgment apparatus includes a storage configured to store first reference data representing data that a detector should output in a first area when a detection target passed the first area, and second reference data representing data that the detector should output in the first area when the detection target passed a second area being different from the first area; and a processor to perform processes of: obtaining data from the detector outputting, in a time-series manner, data according to a detection condition of the detection target passing the first area or the second area; judging a degree of similarity between data obtained by the obtaining and the first and second reference data stored in the storage; and judging whether or not the detection target passed the first area, based on the judgment result by the judging the degree of similarity.
摘要:
A determination apparatus includes a data obtaining unit that obtains data from a detector that outputs data in time series, in accordance with the result of detection of a detection target; a data correction unit that compares reference data indicative of data to be outputted by the detector when the detection target passed through a specific area with the data obtained by the data obtaining unit, and corrects the data obtained by the data obtaining unit so that the data length thereof is equal to the data length of the reference data; a similarity determination unit that determines the similarity between the data corrected by the data correction unit and the reference data; and a determination unit that determines whether the detection target passed through the specific area or not based on the result of the determination by the similarity determination unit.
摘要:
A reader/writer apparatus includes a tag search instruction receiving unit that receives a tag search instruction from a host apparatus. The tag search instruction includes a data read instruction and/or a data write instruction on the RFID tag. The reader/writer apparatus also includes a tag identification information requesting unit that transmits to the RFID tag a request for transmission of tag identification information uniquely identifying the RFID tag when the tag search instruction receiving unit receives the tag search instruction; and a data processing requesting unit that transmits a data read request and/or a data write request to the RFID tag identified by the tag identification information based on the read instruction and/or the write instruction when receiving the tag identification information transmitted from the RFID tag in response to the request for transmission transmitted from the tag identification information requesting unit.
摘要:
A transmission unit of a reader/writer transmits, to an active-type radio tag to perform detection of a signal at a constant time interval by supplying power to a reception unit from a power supply unit for a time period, a signal including an instruction to temporarily extend the time period.
摘要:
An IC-tag reading necessity determination method and system include preparing success rate information indicating a rate of success of receiving a response from an IC-tag to a first signal each time a set or a plurality of sets of transmitting the first signal to the IC-tag a plurality of times is performed, performing processing to transmit a second signal to a target IC-tag from a reading apparatus a plurality of times to acquire response reception success/failure information indicating success/failure of reception of a response to the second signal; and determining whether the target IC-tag is to be read based on the success/failure of each time indicated in the response reception success/failure information and a rate of success of each time indicated in the success rate information.
摘要:
Identification information for identifying IC tags are recorded in association with time information expressing time (timing) at which access using a first antenna is gained, for example, time from when antennas are switched to when the access is gained and position information representing positions of the antenna with respect to a moving direction of the IC tags, identification information is selected on the basis of time for switching to a second antenna arranged on a downstream side of a first antenna, the recorded time information, a position of the second antenna, and the recorded position information, and the IC tags are accessed by using the second antenna on the basis of the selected identification information. When the IC tags are accessed by the plurality of antennas arranged along the moving path of the IC tags, failure of access can be prevented, and overall efficiency can be improved.