Abstract: There is provided a magnetostriction type torque detection sensor which is improved in torque detection sensitivity by increasing respective magnetic paths which are formed between a detected object and a plurality of cores attached to an insulating tubular body in such a manner that a magnetic path which is formed at the detected object is at a predetermined angle to an axis of the detected object. A plurality of cores is arrayed while being inclined at a predetermined angle to an axis of a detected object, and end surfaces of two-side leg portions are attached in such a way as to face the detected object via an inner circumferential surface of an insulating tubular body.

Abstract: There is provided a magnetostriction type torque detection sensor which is improved in torque detection sensitivity by increasing respective magnetic paths which are formed between a detected object and a plurality of cores attached to an insulating tubular body in such a manner that a magnetic path which is formed at the detected object is at a predetermined angle to an axis of the detected object. A plurality of cores is arrayed while being inclined at a predetermined angle to an axis of a detected object, and end surfaces of two-side leg portions are attached in such a way as to face the detected object via an inner circumferential surface of an insulating tubular body.

Abstract: For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from ?15 kA/m to +15 kA/m (both inclusive).

Abstract: For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from ?15 kA/m to +15 kA/m (both inclusive).

Abstract: A plurality of permanent magnets are embedded at predetermined pitches &tgr;p in a longitudinal direction in a field yoke composed of a magnetic substance so that adjacent magnet poles have opposite polarity, and a plurality of electromagnets, which have magnetic pole pitches &tgr;e≈(2n+1)&tgr;p of preset intervals provided that n is 0, 1, 2, . . . , which are disposed at predetermined pitches &tgr;g=(2s+1/m)&tgr;e in the longitudinal direction of the field yoke provided that m is a number of exciting phase and s is 1, 2, 3, . . . , and which are separated from the field yoke by a predetermined gap while opposing to the field yoke, are provided. The field yoke is driven by successively exciting the electromagnets.

Abstract: A plurality of permanent magnets are embedded at predetermined pitches &tgr;p in a longitudinal direction in a field yoke composed of a magnetic substance so that adjacent magnet poles have opposite polarity, and a plurality of electromagnets, which have magnetic pole pitches &tgr;≈(2n+1)&tgr;p of preset intervals provided that n is 0, 1, 2, . . . , which are disposed at predetermined pitches &tgr;g=(2s+1/m)&tgr;e in the longitudinal direction of the field yoke provided that m is a number of exciting phase and s is 1, 2, 3, . . . , and which are separated from the field yoke by a predetermined gap while opposing to the field yoke, are provided. The field yoke is driven by successively exciting the electromagnets.

Abstract: A ring shaped magnetostrictive torque sensor includes a ring core functioning as an exciting core and a detection core. An exciting coil is wound in a circumferential direction along a circumferential inner peripheral surface of the ring core. A plurality of magnetic pole projections project radially and inward from the circumferential inner peripheral surface of the ring corer, and the detection coils are wound around the respective magnetic pole projections. Accordingly, a plurality of detection coils can be arranged without increase in size or cost of the sensor. Since the exciting coil 3 is wound in the circumferential direction, magnetic characteristics along the circumferential direction can be equalized. Hence, a torque sensor is obtained which is capable of conducting a torque detection with high accuracy.

Abstract: A vibration generator which is durable, provides strong thrust and is capable of being reduced in size, cost and weight includes a movable element (50) having a permanent magnet (60) attached thereto; a stationary element (10) having end faces (23), (25) which oppose, across prescribed gaps, respective ones of end faces (53), (54) of the movable element, with the stationary element being excited by passing a current through an attached coil (30) to form a magnetic path with the movable element; and resilient support members (80) for supporting the movable element so that the movable element can vibrate in a direction in which the stationary element is magnetized by the coil.

Abstract: A small-size, thin-profile vibration generating device capable of functioning with improved durability and reliability and with less consumption of power includes a yoke constituting an electromagnet on which a coil has been wound, and a movable element having permanent magnets. The movable element is disposed in a gap, which is provided in the closed magnetic circuit of the yoke, in such a manner that both end faces of the movable element form prescribed gaps with end faces of the yoke. The movable end of a leaf spring is attached to the movable element. The other, fixed end of the leaf spring is attached to the center of the yoke. When the movable element vibrates in the gap, magnetic poles at the end faces of the yoke approached by the end faces of the movable element are magnetically energized by flow of a current in order to be made identical with magnetic poles at the end faces of the movable element, thereby repelling the movable element.