Mitsui Chemicals, Inc.

Other

Murata Manufacturing Co., Ltd.

Katsuki Onishi

Kazuhiro Tanimoto

Mitsunobu Yoshida

Shigeo Nishikawa

Masamichi Ando

Toshihisa Kitagawa

Yuzo Nakamura

Keisuke Sato

Hiroaki Tsushima

A human body detection device including line-shaped piezoelectric substrates respectively provided in each of a plurality of regions in a plate material intersecting a direction of pressure received from a human body, and provided such that an axial direction of each of the piezoelectric substrates runs along the plate material so as to detect pressure applied in a radial direction of the piezoelectric substrate, memory, and a processor coupled to the memory. The processor is configured to be capable of detecting an output signal from each of the piezoelectric substrates.

Human body detection device, bed device, and human body detection system

The present invention provides: a piezoelectric substrate which includes a first piezoelectric body having an elongated shape and helically wound in one direction, and which does not include a core material, in which the first piezoelectric body includes a helical chiral polymer (A) having an optical activity; in which the length direction of the first piezoelectric body is substantially parallel to the main direction of orientation of the helical chiral polymer (A) included in the first piezoelectric body; and in which the first piezoelectric body has a degree of orientation F, as measured by X-ray diffraction according to the following Equation (a), within the range of 0.5 or more but less than 1.0:degree of orientation=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)(in which &#x3b1; represents the half-value width of the peak derived from the orientation).

Piezoelectric substrate, piezoelectric woven fabric, piezoelectric knitted fabric, piezoelectric device, force sensor, and actuator

Provided is a piezoelectric substrate including: an elongate conductor; and an elongate first piezoelectric material helically wound in one direction around the conductor, in which the first piezoelectric material includes an optically active helical chiral polymer (A), the lengthwise direction of the first piezoelectric material and the principal orientation direction of the helical chiral polymer (A) included in the first piezoelectric material are substantially parallel to each other, and the first piezoelectric material has an orientation degree of F. in a range of from 0.5 to less than 1.0, determined from X-ray diffraction measurement by the following Formula (a):orientation degree F.=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)

Piezoelectric substrate, piezoelectric textile, piezoelectric fabric, piezoelectric device, force sensor, actuator, and biological information acquisition device

A sensor module includes a holding member formed of an elastic body, a pressure bearing face provided at the holding member and configured to bear pressure, an adjoining face provided at the holding member so as to adjoin the pressure bearing face and configured to undergo deformation in accordance with the pressure borne by the pressure bearing face, and an elongate piezoelectric substrate arranged on the adjoining face.

Sensor module containing elongate piezoelectric substrate and pressure distribution sensor provided with the same

A piezoelectric substrate, comprising: a conductor cord that has a core material and a conductor disposed around the core material; and an elongated piezoelectric body that is disposed around the conductor cord in a spiral manner, unidirectionally along an axial direction of the conductor cord, wherein: the piezoelectric body comprises an optically active helical chiral polymer, a lengthwise direction of the piezoelectric body and a main orientation direction of the helical chiral polymer in the piezoelectric body are substantially parallel to each other, the piezoelectric body has an orientation degree F. of from 0.5 to less than 1.0, and the conductor cord satisfies Formula (b): &#x394;D&#x3c;t, wherein &#x394;Dis a maximum value of a difference in height between a division A that is selected from plural divisions and a division B that is adjacent to the division A, and tis a minimum thickness of the piezoelectric body.

Piezoelectric substrate, force sensor, and actuator

Provided is: an elongated plate-form piezoelectric body, which contains an optically active helical chiral polymer (A) having a weight-average molecular weight of from 50,000 to 1,000,000 and has an elongated plate shape having a thickness of from 0.001 mm to 0.2 mm, a width of from 0.1 mm to 30 mm and a width-to-thickness ratio of 2 or higher, and in which the lengthwise direction and the main orientation direction of the helical chiral polymer (A) are substantially parallel to each other; the crystallinity measured by a DSC method is from 20% to 80%; and the birefringence is from 0.01 to 0.03.

Elongated plate-form piezoelectric body and production method therefor, layered body and production method therefor, fabric, garment, and biological information acquisition device

Provided is a piezoelectric substrate, containing an elongate piezoelectric body that is helically wound, in which the piezoelectric body includes an optically active polypeptide, a length direction of the piezoelectric body and a main orientation direction of the optically active polypeptide included in the piezoelectric body are substantially parallel to each other, and the piezoelectric body has a degree of orientation F of from 0.50 to less than 1.00, as determined from X-ray diffraction measurement by the following Formula (a):Degree of orientation=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a) in Formula (a), &#x3b1; represents a half width (&#xb0;) of a peak derived from orientation.

Piezoelectric substrate, sensor, actuator, biological information acquisition device, and piezoelectric fiber structure

A polymeric piezoelectric film, including a helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, in which, in the film: a crystallinity given by a DSC method is from 20% to 80%; a standardized molecular orientation MORc is from 3.5 to 15.0 when a reference thickness measured by a microwave transmission-type molecular orientation meter is 50 &#x3bc;m; and when a direction parallel to a phase difference streak is a direction X, a direction perpendicular to the direction X and parallel to a main plane of a film is a direction Y, and the phase difference streak is evaluated by an evaluation method A, per a length of 1,000 mm in the direction Y, a number of phase difference streaks with an evaluation value of 60 or more is 0, and a sum of the evaluation values of phase difference streaks with an evaluation value of 20 or more is 1000 or less.

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Nagoya, Japan

Katsuki Onishi