Abstract: In the disclosure, a failure of a device performing work while moving is more reliably detected while the data amount of failure diagnosis data is reduced. The disclosure includes a frequency analyzing part which performs a frequency analysis on acquired data from an acceleration sensor; a maximum frequency detecting part which detects a maximum frequency from a result of the frequency analysis; and a failure diagnosis data generating part which sets a frequency twice or more of the maximum frequency as a sampling frequency, samples the acquired data from the acceleration sensor, and generates the failure diagnosis data.

Abstract: The disclosure is provided to transmit a sensor value from a sensor to an external device with high efficiency. A sensor value of a sensor is acquired, basic data as time-series data is generated with reference to the acquired sensor value, differential data indicating a difference between the basic data and measurement data as time-series data corresponding to the sensor value acquired from the sensor is generated, and the differential data is transmitted to an external device through wireless communication.

Abstract: Provided is a technology that enables a plurality of sensor information to be synchronized for a technology of a sensor management device communicating with a plurality of wireless sensors in a time division manner. A sensor management device includes a transmission unit that transmits acquisition start instructions for starting acquisitions of sensor information to a plurality of wireless sensors respectively at different timings; and an extraction unit that extracts a plurality of common period sensor information that the plurality of wireless sensors have acquired in the common period from the plurality of sensor information with reference to deviation of times at which the transmission unit has transmitted the acquisition start instructions to the plurality of wireless sensors.

Abstract: A communication device includes a communicator that communicates with an RF tag in a non-contact manner, a communication unit that exchanges data with a host device, and a controller that controls the communicator and the communication unit. Every time the communicator sequentially reads data from the RF tag that passes a communication-feasible region near the communicator at regular time intervals or irregular time intervals, the controller updates first data to be exchanged with the host device by the communication unit so as to include the read data. Also, the controller updates second data to be exchanged with the host device by the communication unit to a value different from a previous value in association with timing with which the first data is updated.

Abstract: The disclosure supports installation of a plurality of communication devices at suitable positions. An RFID system stores first chronological data representing a reception level of a signal at a first communication device and second chronological data representing a reception level of a signal at a second communication device in a measurement period. The system specifies a higher reception level of the reception levels at the first and second communication devices corresponding to an elapsed time from a start time of the measurement period in the first and second chronological data at every elapsed time from the start time and generates third chronological data representing the specified reception level. The system selectively displays at least one of an image based on the first chronological data, an image based on the second chronological data, and an image based on the third chronological data, or display these images at the same time.

Abstract: An operator is enabled to perform an installation test efficiently. A reader device includes an ID determining unit that specifies an ID code of an RFID tag which is an interaction partner when an interaction with the RFID tag succeeds and an output control unit that causes an LED to emit light in different colors when the ID code is the same as an ID code determined in a previous interaction or an ID code stored in advance in a storage unit and when the ID code is different from the ID code determined in a previous interaction or the ID code stored in advance in the storage unit.

Abstract: The disclosure is provided to transmit a sensor value from a sensor to an external device with high efficiency. A sensor value of a sensor is acquired, basic data as time-series data is generated with reference to the acquired sensor value, differential data indicating a difference between the basic data and measurement data as time-series data corresponding to the sensor value acquired from the sensor is generated, and the differential data is transmitted to an external device through wireless communication.

Abstract: Provided is a technology that enables a plurality of sensor information to be synchronized for a technology of a sensor management device communicating with a plurality of wireless sensors in a time division manner. A sensor management device includes a transmission unit that transmits acquisition start instructions for starting acquisitions of sensor information to a plurality of wireless sensors respectively at different timings; and an extraction unit that extracts a plurality of common period sensor information that the plurality of wireless sensors have acquired in the common period from the plurality of sensor information with reference to deviation of times at which the transmission unit has transmitted the acquisition start instructions to the plurality of wireless sensors.

Abstract: In the disclosure, a failure of a device performing work while moving is more reliably detected while the data amount of failure diagnosis data is reduced. The disclosure includes a frequency analyzing part which performs a frequency analysis on acquired data from an acceleration sensor; a maximum frequency detecting part which detects a maximum frequency from a result of the frequency analysis; and a failure diagnosis data generating part which sets a frequency twice or more of the maximum frequency as a sampling frequency, samples the acquired data from the acceleration sensor, and generates the failure diagnosis data.

Abstract: The disclosure supports installation of a plurality of communication devices at suitable positions. An RFID system stores first chronological data representing a reception level of a signal at a first communication device and second chronological data representing a reception level of a signal at a second communication device in a measurement period. The system specifies a higher reception level of the reception levels at the first and second communication devices corresponding to an elapsed time from a start time of the measurement period in the first and second chronological data at every elapsed time from the start time and generates third chronological data representing the specified reception level. The system selectively displays at least one of an image based on the first chronological data, an image based on the second chronological data, and an image based on the third chronological data, or display these images at the same time.

Abstract: An operator is enabled to perform an installation test efficiently. A reader device includes an ID determining unit that specifies an ID code of an RFID tag which is an interaction partner when an interaction with the RFID tag succeeds and an output control unit that causes an LED to emit light in different colors when the ID code is the same as an ID code determined in a previous interaction or an ID code stored in advance in a storage unit and when the ID code is different from the ID code determined in a previous interaction or the ID code stored in advance in the storage unit.

Abstract: An interrogation device includes an interrogation unit that interrogates an RF tag in a contactless manner, and a controller that controls the interrogation unit. The controller obtains a signal strength value and an interrogation success rate from a reception signal received by the interrogation unit when controlling the interrogation unit to transmit a signal with transmission power that is being changed in stages, determines changed transmission power corresponding to a signal strength value and an interrogation success rate that are not less than a threshold selectively from a signal strength value and an interrogation success rate obtained in each stage of the transmission power, and outputs information about the determined transmission power.

Abstract: A controller in an interrogation device performs, for each RF tag passing through an interrogation zone that is defined near an interrogation unit, an integration process of integrating a strength of a reception signal from the RF tag received by the interrogation unit. The integration process includes weighting of an integral value of the strength of the reception signal in a manner to cause an integrate value calculated for each reception signal to be larger than an integral value calculated for a preceding reception signal. When an RF tag moves to a predetermined position in the interrogation zone, the controller transmits, to a host device, an identifier of an RF tag having a maximum integral value selected from the integrated value calculated for each RF tag.

Abstract: A communication device includes a communicator that communicates with an RF tag in a non-contact manner, a communication unit that exchanges data with a host device, and a controller that controls the communicator and the communication unit. Every time the communicator sequentially reads data from the RF tag that passes a communication-feasible region near the communicator at regular time intervals or irregular time intervals, the controller updates first data to be exchanged with the host device by the communication unit so as to include the read data. Also, the controller updates second data to be exchanged with the host device by the communication unit to a value different from a previous value in association with timing with which the first data is updated.

Abstract: A controller in an interrogation device performs, for each RF tag passing through an interrogation zone that is defined near an interrogation unit, an integration process of integrating a strength of a reception signal from the RF tag received by the interrogation unit. The integration process includes weighting of an integral value of the strength of the reception signal in a manner to cause an integrate value calculated for each reception signal to be larger than an integral value calculated for a preceding reception signal. When an RF tag moves to a predetermined position in the interrogation zone, the controller transmits, to a host device, an identifier of an RF tag having a maximum integral value selected from the integrated value calculated for each RF tag.

Abstract: An interrogation device includes an interrogation unit that interrogates an RF tag in a contactless manner, and a controller that controls the interrogation unit. The controller obtains a signal strength value and an interrogation success rate from a reception signal received by the interrogation unit when controlling the interrogation unit to transmit a signal with transmission power that is being changed in stages, determines changed transmission power corresponding to a signal strength value and an interrogation success rate that are not less than a threshold selectively from a signal strength value and an interrogation success rate obtained in each stage of the transmission power, and outputs information about the determined transmission power.

Abstract: A communication device (3) performs contactless communication with an RF tag (8) that is provided with a nonvolatile memory (82) having a plurality of blocks serving as units of data erasure. The communication device (3) includes a specifying unit (303) that specifies, from among blocks to which a writing range belongs, a divided block that includes data outside the writing range when data is written into the nonvolatile memory, a backup processing unit (304) that backs up original data of the specified divided block, a storage unit (36) that stores backup data that includes the original data, and a writing processing unit (305) that writes the update data into the divided block that was initialized when the backup data is stored.

Abstract: A communication device (3) performs contactless communication with an RF tag (8) that is provided with a nonvolatile memory (82) having a plurality of blocks serving as units of data erasure. The communication device (3) includes a specifying unit (303) that specifies, from among blocks to which a writing range belongs, a divided block that includes data outside the writing range when data is written into the nonvolatile memory, a backup processing unit (304) that backs up original data of the specified divided block, a storage unit (36) that stores backup data that includes the original data, and a writing processing unit (305) that writes the update data into the divided block that was initialized when the backup data is stored.