Abstract: A radio communication apparatus is described that includes a reception antenna, a converter, a calculator, and a separator. The reception antenna receives a mixed signal including two or more backscatter signals respectively transmitted from two or more tag devices and the converter converts the mixed signal into complex data on a complex plane. The calculator calculates phase angles of carrier waves of the two or more backscatter signals to approximate the phase angles into a complex data sequence of a predetermined length, and generates a projector matrix formed of a combination of the phase angles of carrier waves of the two or more backscatter signals. The separator separates the two or more backscatter signals from the mixed signal based on an inverse matrix of the projector matrix and the complex data sequence.

Abstract: Provided is a wireless communication system which enables wireless communication in which crosstalk due to multiple access is canceled while using a large number of inexpensive wireless terminals. In order to generate an interference component, an analysis data sequence is generated by applying a Hilbert transform, by a Hilbert transform, to a subcarrier data sequence obtained by extracting a target subcarrier wave component from a finite length data sequence, while a carrier phase difference ? is estimated by using the regression analysis by a carrier wave phase estimation unit. After rotation calculation configured to return the analysis data sequence by the carrier phase difference ? is performed, conversion into an angle is performed. Further, a multiplication by a desired odd number of multiplication is performed, and then an inverse Hilbert transform is applied.

Abstract: The strain gauge for measuring large strains has metallic foil pattern sections including a gauge element pattern section, gauge tab pattern sections and connecting pattern sections attached to a gauge base. The gauge base having the metallic foil pattern sections attached and connected with the bases of gauge leads is almost entirely covered on the surface with a laminating film, and the tip of the laminating film is extended by a predetermined length from the tip end of the gauge base, to form a protruding portion. The protruding portion functions to prevent the separation of the gauge base from an object to be measured.

Abstract: An apparatus generates a cutaneous sense stimulus to call a subject attention to a change in posture based on posture change information (the amount of change in the barycenter, a changing direction of the same, and the like) from a device for detecting a change in posture of the subject. The apparatus has stimulus generating means (a plurality of vibrators) for generating a cutaneous sense stimulus, and stimulus control means for driving the stimulus generating means based on the posture change information. The control means comprises means for selecting a plurality of vibrators arranged substantially parallel with the changing direction based on the changing direction of the barycenter, and sequentially driving the selected vibrators, for example, in a direction substantially opposite to the direction in which the barycenter changes. The control means also drives the vibrators to generate the tactile sense stimulus of a magnitude corresponding to a changing amount of the barycenter.

Abstract: A low coherence light of wide range is fed into a Fabry-Perot load cell having a measured clearance varied in response to physical quantities such as force and pressure or the like to modulate its wavelength. The measured clearance is calculated by the variable gap Fabry-Perot interferometer and the signal processing part in the optical sensor and further the physical quantities are measured.

Abstract: A seating load detecting device in which a lower arm for supporting a seat cushion and a seat back is coupled with an upper rail by a front bracket and a rear bracket. A distortion gage is attached to the bracket. The bracket comprises a curved portion of a U-shape or V-shape. The lower arm and the upper rail are coupled to each other with the direction orthogonal to two opposing legs of the curved portion being vertical. The distortion gage has a total of four distortion detecting elements G11 to G22 distributed in a matrix distribution, two attached in the front and back directional plane of the legs and two attached in the width directional plane of the legs. Due to the Wheatstone bridge connection line of these elements, high gain of a seating load detection voltage e with respect to the amount in change of the vertical load Fv can be obtained.

Abstract: Phase differences generated between respective pairs of rotating members and stationary members mounted on the drive side and load side of a torque transmission shaft are converted into relative opening amounts produced by slits formed in the above pairs of rotating members and stationary members, respectively, and the opening amounts are detected by two opening amount transducers and converted into electric signals. The torque transmitted to the torque transmission shaft is measured by detecting relative phase differences between both rotating members from periodic changes in the outputs from these two opening amount transducers.

Abstract: A load cell includes a load sensing section which is formed by a rigid load introduction section, a rigid load support section and a strain sensing section, and a base plate having a neck and two parallel plate-shaped rigid sections. One part of the plate-shaped rigid section of the base plate is integratedly fixed to the load sensing section, and the strain gauges are mounted on the strain sensing section formed on the load sensing section so as to detect a load applied to the load introduction section and convert the magnitude of a measured load into a quantity of electricity.

Abstract: A strain measuring device using a Wheatstone bridge circuit. An excitation voltage changing switch switches from one excitation voltage to a different excitation voltage in accordance with a controlling circuit providing sequence operation of them and of other circuit elements to remove spurious components affecting the measurement of strain. Such spurious components include potential errors due to thermal electromotive force produced inside or outside said Wheatstone bridge circuit and sensitivity error due to drift voltage occurring in the driver circuit of the bridge current source. A comparator may be used to effect judgment of the amount of the measured value of the voltmeter, so that the controlling circuit causes excitation voltage changing switch to select only two excitation voltages out of at least three for switching no matter how many excitation voltages are provided for in the bridge current supply source.

Abstract: A strain gage load converter having a parallelogram shaped beam having strain gages on the top and bottom surfaces of the beam. These gage mounting surfaces are made reentrant concave shaped in order to eliminate occurrence of measurement loss due to lateral shift of load point against the main axis of the beam.

Abstract: A unit type strain gauge having a protective outer casing of a hard material provided with an internal space open at one side and a pressing member housed in the internal space arranged to press a strain gauge element attached to it against an object, in which strain is to be measured, the remainder of said space being filled with soft synthetic rubber arranged to maintain the parts of the gauge in position and to maintain a dust proof and moisture proof structure.