Fujitsu Corporation

The University of Tokyo

Satoshi Sano

Fumihiko Nakazawa

Yuji Takahashi

Takashi Katsuki

Nobuyasu Yamaguchi

Yasuhide Iwamoto

Yasuhiko Nakano

Yoshio Satoh

Takashi Matsuda

Atsuo Iida

Fumitaka Abe

Hideki Tomimori

Eishi Morimatsu

Takushi Fujita

Ken Sasaki

Junichi Odagiri

Asako Kitaura

Takayuki Yamaji

Yuta Masuda

Hitoshi Okumura

Koji Oguri

Yoshio Ishida

Haruki Kawanaka

Yosuke Fujisawa

Yuichi Tanaka

An information processing device includes: a memory; and a processor coupled to the memory and configured to: detect an environment around a vehicle which is driven by a driver; generate a hazard list of an object to be a hazard based on the detected environment; detect a gaze of the driver; evaluate a risk regarding driving of the driver for each object included in the hazard list based on a frequency at which the object included in the hazard list is included in a field of view of the driver based on the detected gaze; and output drive assist information corresponding to the object with the evaluated risk that is equal to or larger than a threshold.

Information processing device, drive assist system, and drive assist method

A method for data collection includes: executing a specification process for identifying a first apparatus from among a plurality of first apparatuses; executing a requesting process that includes transmitting a request to the identified first apparatus; executing a recording process for recording, in a storage, a first identifier of the identified first apparatus when a second apparatus does not receive a response from the identified first apparatus within a predetermined time after transmitting the request; executing a decision process for deciding, in response to an access from any of the plurality of first apparatuses, whether an identifier of the any of the plurality of first apparatuses matches the first identifier stored in the storage; and executing, when the identifier matches the first identifier stored in the storage, a re-requesting process for re-requesting data to the any of the plurality of first apparatuses.

Method, apparatus, and system for data collection

A drowsiness detection device includes a memory; and a processor coupled to the memory and the processor configured to calculate a respiration variation period based on heartbeat interval data which is generated based on data that is obtained from a heartbeat sensor; predict a subsequent period structure of the respiration variation based on the calculated respiration variation period; determine whether or not an abnormal signal is mixed in the heartbeat interval data by comparing the heartbeat interval data during sequential update and the predicted subsequent period structure; and replace the respiration variation period which corresponds to the heartbeat interval data that includes the abnormal signal with the predicted subsequent period structure in a case where it is determined that the abnormal signal is mixed.

Drowsiness detection device, drowsiness detection method, and computer-readable recording medium storing program for drowsiness detection

A non-transitory computer-readable recording medium stores a program that causes a computer to execute a process including: first setting an arousal section including from a time point when a subject has got on a vehicle to a time point when a predetermined time has elapsed thereafter; determining whether an arousal level of the subject has moved toward arousal in a section which is temporally later than the arousal section, based on a biosignal detected from the subject; when the arousal level has moved toward arousal in the section which is temporally later than the arousal section, updating the arousal section with a section in which the arousal level has moved toward arousal; and second setting a threshold value for determining whether the subject is in an arousal state, based on a statistical value of the subject's arousal levels corresponding to the updated arousal section.

Arousal level determination device and computer-readable recording medium

An arousal-level determining apparatus includes a generating unit, a calculating unit, an identifying unit, and a determining unit. The generating unit generates heartbeat-interval variation data, which indicates changes in heartbeat interval, on the basis of heartbeat signals indicating subject's heartbeats. The calculating unit applies a band-pass filter, which allows passage of a certain range of frequencies, to each frequency band in the heartbeat-interval variation data while changing the frequency band, and calculates spectral density with respect to each frequency band applied with the band-pass filter. The identifying unit identifies a feature point corresponding to a spectral density peak in the calculated spectral densities in the frequency bands. The determining unit determines subject's arousal level on the basis of the identified feature point.

Arousal-level determining apparatus and arousal-level determining method

A photoelectric sphygmograph measurement device includes a light emitting part emitting light pulses, a light receiving part having a light receiving element that receives the light pulses and producing a corresponding output signal, and a control part driving the light emitting part to emit the light pulses and performing a pulse wave measurement by using the output signal. The control part drives the light emitting part so that a charge accumulated in the light emitting element converges on a predetermined amount in a case where the charge accumulated in the light receiving element decreases to the predetermined amount or less during a time when driving of the light emitting part is stopped and/or in a case where the light receiving element changes to a first state in which the light receiving element is capable of receiving the light pulses from a second state in which the light receiving element is not capable of receiving the light pulses.

Photoelectric sphygmograph measurement device

A heartbeat signal method includes detecting first and second heartbeat signals, where the first and second heartbeat signals may be potential difference signals with respect to a reference potential. First and second average DC voltage values as voltage values of direct-current components in the first and second heartbeat signals are calculated. First and second average AC amplitude values as amplitude values of alternate-current components in the first and second heartbeat signals are calculated, and a correlation coefficient between the alternate-current component in the first heartbeat signal and the alternate-current component in the second heartbeat signal is calculated. An amplification factor is set to amplify the first or second heartbeat signal on the basis of the first and second average DC voltage values, the first and second average AC amplitude values, and the correlation coefficient. A differential heartbeat signal is generated by amplifying the first or second heartbeat signal by the amplification factor, and a difference between the first and second heartbeat signals is calculated.

Heartbeat signal processing method

A noise processing apparatus measures a first potential difference signal, between a first electrode and a second electrode that is used as a reference electrode, and measures a second potential difference signal, between the second electrode and a third electrode that is arranged on the steering unit in the apparatus. The apparatus calculates the difference between the intensities of the first potential difference signal and the second potential difference signal calculated at the predetermined intervals. The apparatus corrects the first potential difference signal or the second potential difference signal by using the calculated difference such that the intensities of the first potential difference signal and the second potential difference signal are canceled out. The apparatus calculates a differential signal indicating the difference between the first potential difference signal and the second potential difference signal by using the corrected potential difference signal, and outputs the differential signal.

Noise processing apparatus

A heartbeat signal processor includes a first and second electrodes to obtain a first and second heartbeat signals, a DC voltage calculating unit and an AC amplitude calculating unit to calculate first and second average DC voltage values of direct-current components and first and second average AC amplitude values of alternate-current components in the first and second heartbeat signals, a correlation coefficient calculating unit to calculate a correlation coefficient between the alternate-current components in the first and second heartbeat signals, an amplification factor setting unit to set an amplification factor on the basis of the first and second average DC voltage values, the first and second average AC amplitude values, and the correlation coefficient, and a signal generating unit to generate a differential heartbeat signal by amplifying the first or second heartbeat signal on the basis of the amplification factor and calculating a difference between the first and second heartbeat signals.

Heartbeat signal processor and heartbeat signal processing method

A burst wave is applied to an excitation element of a touch panel main body from an oscillation section so as to excite surface acoustic waves, and the excited surface acoustic waves are received by a receiving element of the touch panel main body. The received signals are A/D converted by a receiving section, and a control section calculates the contact position and the contact width of the object in contact with the touch panel main body, based on time-series changes in the received strength. Based on the received strength of surface acoustic waves, the control section controls the wave number of the burst wave to be applied to the excitation element.

Touch panel device and contact position detection method

Each of transducers of a touch panel device includes a piezoelectric thin film, a plate electrode disposed at one surface of the piezoelectric thin film and a comb-like electrode disposed at the other surface of the piezoelectric thin film. The comb-like electrode has a plurality of comb-like electrode fingers and a linear bus electrode to which one end of each of the plural comb-like electrode fingers is connected. A plurality of wiring electrodes is provided at the outer side of any of the transducers in parallel with the bus electrode of the transducer and is connected to the bus electrode and the plate electrode of any of the transducers. Each of the wiring electrodes includes an electrode base portion formed by printing silver paste containing fine particles on the substrate and an electrode main body formed by printing silver paste containing large particles and fine particles in a mixed manner on the electrode base portion.

Touch panel device and method for manufacturing touch panel devices

Surface acoustic waves are propagated in a lower-left oblique direction and a lower-right oblique direction from an excitation element located on the upper side of a non-piezoelectric substrate and then received by receiving elements located on the left side and the right side, while surface acoustic waves are propagated in an upper-left oblique direction and an upper-right oblique direction from an excitation element located on the lower side of the non-piezoelectric substrate and then received by the receiving elements located on the left side and the right side. Based on the received results at the two receiving elements, a position of an object in contact with the non-piezoelectric substrate is detected. The sensitivity in a region near the diagonal, which is influenced largely by propagation loss of the surface acoustic waves, is improved by increasing the widths of the electrode fingers of the excitation elements and/or the receiving elements, the number of pairs of the electrode fingers, or the aperture width of comb-like electrodes, according to an increase in the propagation distances of the surface acoustic waves, i.e., toward the region near the diagonal.

Touch panel device

A touch panel device includes an excitation transducer for exciting a surface acoustic wave upon application of a burst wave and a reception transducer for receiving the surface acoustic wave and converting the same into a reception signal that are arranged at a peripheral portion of a detection area so that a position of an object touching the detection area is detected in accordance with a change in the reception signal. A control method for eliminating noises in the touch panel device includes the steps of detecting a differential between a reception signal due to a burst wave and another reception signal due to another burst wave, deciding that there is a noise if the detected differential exceeds a preset threshold value, and performing a control operation so that the detection of an object based on the reception signal is not performed in accordance with the decision.

Touch panel device and control method and device for eliminating noises in touch panel device

A plurality of excitation elements are disposed on two facing sides of a quadrilateral detection range in a non-piezoelectric substrate, and a plurality of receiving elements are disposed on the other two sides of the detection range so as to face the excitation elements respectively. Surface acoustic waves are transmitted from the respective plurality of excitation elements in two diagonal directions of the detection range respectively, and the surface acoustic waves from the two diagonal directions are received by the respective receiving elements, so that a position of an object in contact with the substrate is detected based on received results in the receiving elements.

Growing community of inventors

Kawasaki, Japan

Satoshi Sano