Tokai Rubber Industries, Ltd.

Sumitomo Riko Company Limited

Riken Corporation

Tetsuyoshi Shibata

Tomonori Hayakawa

Koichi Hasegawa

Ichinosuke Maeda

Atsushi Muramatsu

Rentaro Kato

Hironori Koyama

Kazunobu Hashimoto

Masaru Murayama

Yuuki Saitou

Yo Kato

Hirokazu Yamamoto

Hiroyuki Nakajima

Yuki Saito

Toshiharu Mukai

A capacitance measurement device includes a bridging capacitor connected in series to another one of the opposite end sides of a measurement-objective capacitance, and a charging/discharging switching element connected in series to the other one of the opposite end sides of the measurement-objective capacitance, and connected in parallel to the bridging capacitor. The measurement-objective capacitance is discharged when the charging/discharging switching element is turned to the closed state, and is charged when the charging/discharging switching element is turned to the opened state. A gauge gains an equivalent value for the measurement-objective capacitance, based on a potential at the other one of the opposite end sides of the measurement-objective capacitance, at the time of the charging step.

Capacitance measurement device, capacitance-type sheet-shaped sensor apparatus, and capacitance-type liquid-level detector apparatus

Provided is an input state detection device capable of reliably detecting contact and pressing of an object. A state switching switch can switch a first state in which a voltage application terminal of a constant-voltage power supply is connected to a side of a first electrode and a detection terminal of a detector is connected to a side of second electrodes, and a second state in which the voltage application terminal of the constant-voltage power supply is connected to the side of the second electrodes and the detection terminal of the detector is connected to the side of the first electrode. An input detector detects whether the object is in a non-contact state or in a contact but not pressing state with respect to a surface on the side of the second electrodes based on a value detected by the detector with the state switching switch in the first state.

Input state detection device

A capacitance type sensor includes: a dielectric layer made of a polymer; an elongated front-side electrode placed on a front side of the dielectric layer; an elongated back-side electrode placed on a back side of the dielectric layer; a front-side wiring connected to the front-side electrode; a back-side wiring connected to the back-side electrode; and a plurality of detection portions formed between the front-side electrode and the back-side electrode. Each of the front-side electrode and the back-side electrode has an elongated electrode body containing a binder and a conductive material, and an extended wiring portion extending in a longitudinal direction of the electrode body and having lower volume resistivity than the electrode body, and the front-side wiring and the back-side wiring have lower volume resistivity than the electrode body.

Capacitance type sensor

Provided are a bending sensor that is less dependent on an input speed of a strain and in which a response delay is unlikely to occur, and a deformed shape measurement method using the bending sensor. The bending sensor is configured to include a base material; a sensor body arranged on a surface of the base material and containing a matrix resin and conductive filler particles filled in the matrix resin at a filling rate of 30% by volume or more, and in which three-dimensional conductive paths are formed by contact among the conductive filler particles, and electrical resistance increases as an deformation amount increases; an elastically deformable cover film arranged so as to cover the sensor body; and a plurality of electrodes connected to the sensor body and capable of outputting electrical resistances. In the sensor body, cracks are formed in advance in such a direction that the conductive paths are cut off during a bending deformation.

Bending sensor and deformed shape measurement method

An active vibration damper including: an inner shaft member provided to a movable member; an outer tube member provided to a stator; a pair of leaf springs elastically connecting axially both sides of the inner shaft member and the outer tube member so as to make a linear actuator operatable by itself; an elastic connecting rubber connecting the inner shaft member and the outer tube member; a mass body holding portion provided to the inner shaft member for holding an additional mass body that is disposed further outwardly than the elastic connecting rubber; and a housing having a structure dividable in an axial direction in which respective openings are secured to each other with an annular seal being interposed therebetween at an outer peripheral side of the elastic connecting rubber.

Active vibration damper and method of manufacturing active vibration damper

A deformable sensor system that can be used for pressure-distribution sensors. The deformable sensor system makes it possible to obtain a pressure distribution with a much higher accuracy, while reducing the number of electrodes. The system utilizes a deformable sensor which can detect deformation as the electric resistivity of the surface increases monotonically as an elastic deformation variation in each of the elastic deformations increases. Based on a voltage being detected by means of a detecting unit, the deformable sensor electric-resistivity variation computing unit computes the variation of the electric resistivity based on the method of least squares with a restriction condition imposed thereon. The system uses such a technology as 'EIT' that is based on an inverse-problem theory. At an external-force position computing unit, a position in a pressure-receiving surface, position which receives an external force, is computed based on the computed electric-resistivity variation.

Deformable sensor system

Growing community of inventors

Aichi, Japan

Tetsuyoshi Shibata