Fujitsu Corporation

Fujitsi Limited

Jun-ichi Nagata

Kouichi Kanda

An information processing apparatus includes a memory, and a processor coupled to the memory and configured to, execute a first process by using electric power supplied from a battery, identify a first change amount of electric current supplied from the battery, the first change amount being caused by execution of the first process, measure a second change amount of an output voltage of the battery, the second change being caused by the execution of the first process, measure an internal impedance of the battery based on the first change amount and the second change amount, and identify a remaining amount of the battery by using the measured internal impedance.

Information processing apparatus, method and non-transitory computer-readable storage medium

A position detection system includes a GNSS sensor terminal that receives a satellite signal from a GNSS satellite as a snapshot, at least one relay device that receives the snapshot GNSS signal transmitted by the GNSS sensor terminal, and a calculation device that measures a position of the GNSS sensor terminal by using a code phase and a Doppler frequency of the GNSS satellite obtained from the snapshot GNSS signal, wherein the calculation device estimates an initial position of the GNSS sensor terminal by using position information of the relay device that has received the snapshot GNSS signal transmitted by the GNSS sensor terminal.

Position detection system, position detection device, position detection method, and sensor terminal

A remaining battery charge measuring circuit for measuring remaining charge of a battery, includes: an LC circuit including an inductance element and a capacitance element; and a switch element that controls coupling between the battery and the LC circuit, wherein the switch element disconnects the LC circuit from the battery, based on a resonant frequency by the LC circuit.

Remaining battery charge measuring circuit, electronic device, and remaining battery charge measuring method

A wireless communication apparatus includes: an optical sensor; and a wireless communication circuit configured to execute a transmission process that transmits a first signal based on data stored in a storage element and a reception process that receives a second signal in response to the transmission of the first signal, wherein the wireless communication circuit is further configured to write data to the storage element in accordance with the second signal received in the reception process when an output level of the optical sensor is in a first state in which the output level of the optical sensor is equal to or higher than a predetermined threshold.

Wireless communication apparatus, wireless communication system, and wireless communication method

A data compression device including a processor to perform a procedure comprising: obtaining data of a predetermined number (Z) of digits in a time series; and performing a compression process on the data. The data is obtained by encoding a vibration state of a measurement target. The compression process includes: deleting upper digits when the upper digits do not include significant information; and adding a unique code to a top of the upper digits when the upper digits include significant information. A digit number (X) of the upper digits is smaller than the predetermined number (Z).

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Kawasaki, Japan

Jun-ichi Nagata