Matsushita Electric Industrial Co., Ltd.

Katsunori Matsubara

Takashi Tamai

Tsuyoshi Tanaka

Nobuharu Katsuki

Hiroki Moriwake

Junichi Yukawa

Takeshi Yamamoto

Makoto Inoue

Jiro Terada

Rihito Shoji

Satoshi Ouchi

Masakazu Hatanaka

Kiyoshi Saitou

A steering angular velocity computing device detects a change in a steering angle, measures a required time from a time when the steering angle changed until a time when the steering angle next changed, and computes, after the detector has detected a change in the steering angle, the steering angular velocity by dividing an amount of change in the steering angle by the required time corresponding to the amount of change and outputs it. When the steering angular velocity is being reduced, the steering angular velocity computing unit outputs the steering angular velocity during a first extended output period longer than the required period. Thus, the steering angular velocity is outputted with a high accuracy when the steering angular velocity is being reduced.

Steering angular velocity computing device and method

Operates steering angular velocity in first steering angular velocity calculating unit and second steering angular velocity calculating unit, by using steering angle signal from steering angle generating unit, and outputs steering angular velocity by switching them with reference to a certain threshold value of steering angular velocity.

Steering angular velocity detecting device

Here disclosed is an angular velocity sensor with much accuracy, not allowing other vibration components to mix into the Coriolis force component. The angular velocity sensor contains a first through a fifth beams: the first, the second, and the third beams have a length of substantially the same and disposed in a substantially parallel arrangement on a substantially the same plane&mdash;with the first beam placed between the second and the third; the fourth connects each one end of the first through the third, while the fifth connects each other end of them. The first beam is supportively fixed at its mid-portion. The first beam serves as a detector; the second serves as a driver; and the third serves as a monitor.

Angular velocity sensor

An object of the present invention is to improve the efficiency of a driving operation of an angular rate sensor employing a tuning fork oscillator made of single crystalline piezoelectric material such as quartz. In order to achieve the object of the present invention, a tuning fork oscillator assembled directly has driver electrodes and detector electrodes provided on a first main surface, a second main surface, an outer surface, and an inner surface of a arm, respectively. The oscillator also has a driver electrode, a monitor electrode, and detector electrodes provided on a first main surface, a second main surface, an inner surface, and an outer surface of the other arm thereof, respectively. A driving voltage is supplied from a driving power source so that the two driver electrodes may be equal in the polarity while the polarity of the driver electrode is opposite to that of the driver electrodes.

Angular rate sensor

An angular velocity sensor includes first exciters providing a vibrator with drive vibration, a piezoelectric element having a vibration detector for detecting vibration level of the vibrator, and Coriolis detectors for detecting Coriolis vibration depending on an input angular velocity, and including a driving circuit for receiving a signal from the vibration detector and issuing a signal to the first exciters and a detection circuit for receiving signals from the Coriolis detectors. The circuit section further includes a level judging circuit for judging abnormal levels of electric charges in the Coriolis detectors and a fail detector for issuing an output when abnormality is detected. Each output of the Coriolis detectors contains a drive vibration component larger than the reference level of the level judging circuit, and the layout of the electrodes in the element section is adjusted so that combined output may contain the component smaller than the reference level.

A low cost high-performance temperature sensor that can be manufactured of a thin-film temperature detecting element with high yield. The temperature sensor has a metal cylinder (,); a ceramic substrate (,) placed in the metal cylinder and a temperature detecting element (,) and film electrodes (,) connected with the output of the temperature detecting element (,); an inorganic filer (,) for absorbing stress to hold the ceramic substrate (,) inside the metal cylinder (,); and a cap (,), provided on one end of the metal cylinder (,), for protecting the temperature detecting element (,) on the ceramic substrate (,). One end of the ceramic substrate is fixed to a first end of a terminal (,) which is U-shaped, and the terminal includes an expansion and contraction absorbing portion (,) between a first and second end.

Temperature sensor and method of manufacturing the same

In order to present a temperature sensor which works stable also in a high temperature condition showing only a small deviation in the resistance value of thermistor, the invented temperature sensor comprises a heat resisting cap (,) made of a metal, a thermistor (,) housed inside the heat resisting cap (,) and at least more than one lead wire (,) which is electrically connected with the thermistor (,) and is pulled out of said heat resisting cap (,), said heat resisting cap (,) being formed with an alloy containing Ni&mdash;Cr as the main ingredient.

Temperature sensor and a method of manufacturing the same

The invention relates to a temperature detecting apparatus and an automobile using the same, and is intended to improve the heat response characteristic. The apparatus comprises a first metal pipe, first and second metal wires accommodated in the first metal pipe, at least one end of each wire being projected from one end of the first metal pipe, an insulator for keeping an electric insulation of the first metal pipe and the first and second metal wires in the first metal pipe, a temperature detecting element projecting out of one end of the first metal pipe and disposed between ends of the first and second metal wires, and a metal cap fitted to one end of the first metal pipe for covering the temperature detecting element, wherein the temperature detecting element is in a substantially flat shape or in a flat shape longer in the length in the direction between the first and second metal wires than the length in the direction at right angle thereto, and a portion of the metal cap opposite to the temperature detecting element is in a flat shape in the same direction in a shape similar to the temperature detecting element.

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Osaka, Japan

Katsunori Matsubara