Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Yasunobu Kobayashi

Yasunori Matsukawa

Akira Matsuura

Takashi Kawai

Tomohiro Mitani

Katsuhiko Omoto

Youhei Ashimori

Toshiharu Motofusa

Shusaku Kawasaki

Shigehiro Yoshiuchi

Shinjiro Ueda

Tsutomu Nakanishi

Takaaki Ogawa

Toshiro Otobe

Toshirou Otobe

Hiroaki Mouri

Sigehiro Yosiuti

Koumei Hujita

Hiroaki Mori

Kazuhiko Miyagoshi

Noriyuki Jitousho

TheAnangular velocity sensorof the present inventionhas one end connected toaholding section andthe otheranotherend connected toaweighting section. According to the angular velocity sensor,adriving arm has adog-legbentstructure of arms extending in a direction perpendicular to a connecting direction oftheholding section andtheweighting section.

Angular velocity sensor element, angular velocity sensor and angular velocity sensor unit both using angular velocity sensor element, and signal detecting method for angular velocity sensor unit

An angular velocity sensor includes a fixing section to be fixed to an object, first and second connection beams each having one end connected to the fixing section, first and second double-end-supported beams, first and second driving electrodes to vibrate the supported beams, and first and second sensing electrodes to detect vibrations of the supported beams. The first supported beam has its ends connected to second ends of the first and second connection beams. The first supported beam, the first connection beam, and the second connection beam surround one side surface of the fixing section. The second supported beam has its ends connected to second ends of the first and second connection beams. The second double-end-supported beam, the first connection beam, and the second connection beam surround another side surface of the fixing section opposite the one side surface of the fixing section.

Angular velocity sensor

A physical quantity sensor includes a beam-like vibrating body and a fixing part supporting both ends of the beam-like vibrating body. A driving element is formed on a central portion of the beam-like vibrating body, and feedback elements are formed on both ends. A physical quantity acting on the beam-like vibrating body is detected by causing natural vibration in the beam-like vibrating body and detecting a natural frequency of the vibrating body. This enables reliable detection of a physical quantity, such as a strain or load, acting on an object.

Physical quantity sensor

The angular velocity sensor of the present invention has one end connected to holding section and the other end connected to weighting section. According to the angular velocity sensor, driving arm has a dog-leg structure of arms extending in a direction perpendicular to a connecting direction of holding section and weighting section.

It is aimed to provide a strain detector having a fewer number of mounting parts and high operation efficiency and usability. The strain detector is provided with a cylindrical strain generator to be strained upon receiving a load, a resistor element which is arranged on the outer circumferential surface of the strain generator and whose resistance varies depending on the amount of strain, a signal processing circuit connected with the resistor element and screw portions arranged above and below the strain generator to sandwich the strain generator. The strain generator and the screw portions are integrated.

Strain detector having a column-shaped strain generator

A strain detector includes a bridge circuit having at least two strain resistance elements, a substrate, a first fixed member, and a second fixed member. The substrate has a circuit portion electrically connected to the strain resistance elements. The strain resistance elements are arranged on the substrate. The first fixed member is fixed to a center of an area, where an outer periphery of the area is set at a position at which the strain resistance elements are arranged. The second fixed member is fixed outside the position, where the strain resistance elements are arranged at the substrate. A center of an axis of the first fixed member, a center of an axis of the second fixed member, and the center of the area are positioned on a straight line, and the first fixed member and the second fixed member are arranged on two mutually opposed surfaces of the substrate.

Distortion detector

A fixing member is composed of an upper washer and a lower washer; and a sensor substrate is sandwiched and held by the upper and lower washers. A strain-detecting element is disposed on the sensor substrate. A strain sensor as configured above is fixed onto a measurement target via the fixing member. Accordingly, the strain sensor does not generate an output signal when no external force is applied, demonstrating stable characteristics.

Strain sensor

The present invention provides a strain detector improved in output characteristic, in which no internal stress is generated in strain resistance elements even with it fixed on a fixing member. The strain detector is configured in that a detection hole is provided nearly at the center of a insulating substrate, a fixing hole is formed at the position of peripheral end, a portion around the detection hole is pressed by a pressing member, one holding member and the other holding member are provided with fixing holes opposing to the fixing holes of the insulating substrate, and the peripheral end of the insulating substrate is fixed by the fixing member inserted. Accordingly, the detection hole in the insulating substrate is peripherally displaceable in a vertical direction with respect to one holding member and the other holding member.

Strain detector having a displaceable insulating substrate

A strain sensor improved in detection accuracy without variation of bending stresses applied to the strain detecting element. The sensor substrate has a first fixing hole at one end and a second fixing hole at the other end, a detecting hole at the center, and at least one strain detecting element on the upper surface or lower surface thereof. The first fixing member is press-fitted into the first fixing hole. The second fixing member is press-fitted into the second fixing hole. The detecting member is press-fitted into the detecting hole. Further, when an external force is applied to the detecting member, strain generated due to the positional shift of the detecting member is detected by the strain detecting element with respect to the first fixing member and the second fixing member.

Growing community of inventors

Fukui, Japan

Yasunobu Kobayashi