Fujitsu Corporation

Hidenori Sekiguchi

Akira Fujii

Soichi Hama

Daisuke Uchida

Akihiro Inomata

Fumio Tabata

Yuji Sakata

Masato Sakata

Masafumi Asai

Toshiaki Nagai

Shinichi Wakana

Toru Kamada

A blood flow index calculating method includes: obtaining, by a camera, an image capturing a first site of a living body and a second site of the living body; extracting an area of the first site of the living body and an area of the second site of the living body, by a processor; detecting a pulse wave pattern of the first site of the living body from the area of the first site of the living body and detecting a pulse wave pattern of the second site of the living body from the area of the second site of the living body, by the processor; first calculating a delay amount from the pulse wave pattern of the first site and the pulse wave pattern of the second site, by the processor; and second calculating an index related to blood flow by using the delay amount, by the processor.

Blood flow index calculating method, blood flow index calculating apparatus, and recording medium

A pulse wave detection method includes obtaining an image obtained by photographing a subject with an imaging device, extracting intensities representative of signal components of a specific frequency band for respective wavelength components among signals of a plurality of wavelength components included in the image, calculating, using the intensities extracted for the respective wavelength components, a weight coefficient by which a signal is multiplied when the signals are calculated between the wavelength components to minimize an arithmetic value of the signal components in the specific frequency band after multiplication, multiplying at least one of the signals of the respective wavelength components by the weight coefficient, performing arithmetic operation on the signals between the wavelength components after multiplication by the weight coefficient, and detecting pulse waves of the subject using a signal after the arithmetic operation.

Pulse wave detection method, pulse wave detection apparatus, and recording medium

A positioning and ranging system includes a transmitter transmits a plurality of impulses; and a receiver receives the impulses; the receiver includes an initial detection unit records a sensing time of a first impulse among a plurality of impulses transmitted by the transmitter; a sensing margin detection unit for detecting a sensing margin being a difference between a field intensity of the first impulse and a reception limit field intensity of the receiver; a correction unit identifies a sensing error differential time based on a given relationship between the sensing margin and the sensing error differential time, and corrects the sensing time detected by the initial detection unit using the identified sensing error differential time; the system measures a distance between the transmitter and the receiver and a position of the transmitter based on a time the transmitter transmits the first impulse and a time the receiver receives the impulse.

Radio positioning and ranging system and positioning and ranging program

To realize variable control of the output value of impulses with a simple construction, the present device includes an impulse generating unit which generates impulses; and a control unit which controls an output value of impulses output from the impulse generating unit by changing an input signal that is input to the impulse generating unit for generating impulses.

Impulse generating device, communication device, and a computer-readable recording medium recording an impulse control program thereon

An ultrasonic length measuring apparatus measures the number of times a waveform of an ultrasonic wave signal crosses a threshold value, detects the crossing timing at, for example, a waveform having a maximal amplitude after a predetermined number of times counting from a first crossing point, measures the time period from the transmission start of the ultrasonic wave by the transmission unit to the detected crossing timing and calculates the length based on the time measured. A coordinate inputting apparatus includes a pen for transmitting an ultrasonic wave and a coordinate inputting apparatus for inputting coordinate positions of the pen based on a propagation time of the ultrasonic wave transmitted by the pen and received by a plurality of ultrasonic wave receivers. The receiver includes at least a pair of ultrasonic receivers for receiving the ultrasonic wave transmitted by the pen.

Ultrasonic length measuring apparatus and method for coordinate input

In the present invention, two ultrasonic receivers are provided in common for plural input planes, and the plural input planes are restricted to a plane not perpendicular to a line connecting the two ultrasonic receivers, so that the sufficiently practicable coordinate input device can be provided. When the line connecting two ultrasonic receivers is perpendicular to the input plane, the distances from the input device to the two ultrasonic receivers exist in plural sets, so that the coordinates of an input device cannot be specified. Furthermore, in order to acquire the coordinates of the input device by the two ultrasonic receivers, a positional relations between the two ultrasonic receivers and the input planes are made initial setting in advance. When set in advance, it is possible to acquire the position of the input devices in the plural input planes from the distance from input device to two ultrasonic receivers.

Coordinate input apparatus

A device for measuring an electric current of a target circuit includes a pair of contact pins, a resistor electrically connected between the contact pins, a voltage drop appearing across the resistor when the contact pins come into contact with the target circuit to direct the electric current to the resistor, and an electro-optical crystal electrically connected between the contact pins in parallel with the resistor, the electro-optical crystal having a voltage applied thereto responsive to the voltage drop appearing across the resistor, wherein the voltage applied to the electro-optical crystal changes polarization of a light beam passing therethrough, thereby allowing the electric current to be measured from the polarization.

Device for measuring electric current by use of electro-optical crystal

It is an object of the present invention to provide a circuit board trimming apparatus and method used, in which apparatus and method a wiring pattern on a printed circuit board is trimmed, and to provide a circuit board trimming apparatus and method, in which apparatus and method a wiring pattern is trimmed efficiently while damage to the circuit board is minimized. A force exerted by a cutter against the circuit board is measured when the wiring pattern is cut by pressing an ultrasonic cutter against the wiring pattern on the circuit board and by moving the circuit board and the cutter relative to each other, a shape of the wiring pattern being determined on the basis of the force thus measured and a cutting process being controlled in accordance with the shape of the wiring pattern.

Circuit board trimming apparatus and method

A vertical stepper transfers a circuit pattern formed on a mask onto a wafer using synchrotron radiation instead of a light source. The vertical stepper includes a wafer stage for having the wafer mounted thereon in the vertical direction and a mask stage for having the mask mounted thereon in the vertical direction. The wafer stage includes a coarse X-Y stage, a transfer member, and a wafer mounting member. The wafer mounting member is provided with a fine X-Y stage. The wafer mounting member is moved in the horizontal direction between a first position mounted on the coarse X-Y stage and a second position mounted on the mask stage by the transfer member. When exposed to the synchrotron radiation, the wafer mounting member is integrated with the mask stage. After the wafer and the mask are strictly correctly positioned by the fine X-Y stage, the wafer mounting member, integrated with the mask stage, is stepped and repeat exposed by scanning in the vertical direction.

Growing community of inventors

Kawasaki, Japan

Hidenori Sekiguchi