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81. 发明专利

JP2000294843A PIEZOELECTRIC ELEMENT AND LAMINATED PIEZOELECTRIC ACTUATOR 失效
公开(公告)号：JP2000294843A
公开(公告)日：2000-10-20
申请号：JP10114199
申请日：1999-04-08
申请人： NISSAN MOTOR , KYOCERA CORP
发明人： SHINOHARA MIKIYA , AKIMUNE YOSHIO , ONIZUKA KATSUHIKO , HIGASHIBETSUPU MAKOTO
IPC分类号： H01L41/083 , H02N2/00
摘要： PROBLEM TO BE SOLVED: To obtain a laminated piezoelectric actuator using such a highly reliable piezoelectric element that the element does not crack even when the element is repeatedly operated, because the electric field applied upon the peripheral portions of the internal electrodes of the element continuously becomes lower in the portions, even when the internal electrodes do not have unique shapes. SOLUTION: A piezoelectric element sandwiches a piezoelectric element substrate 1 between internal electrode layers 4. Layers 5 having lower dielectric constants than the substrate 1 has are respectively interposed between the substrate 1 and the peripheral sections of the electrode layers 4. A laminated piezoelectric actuator is constituted by alternately laminating piezoelectric elements thus constituted and metallic plates 2 upon another. Therefore, such a highly reliable piezoelectric element that the substrate of the element does not crack even when the element is repeatedly driven, because the electric field applied upon the portion of the substrate around the internal electrodes continuously becomes lower in the portion even when the electrode do not have unique shapes, and a laminated piezoelectric actuator using the piezoelectric element can be provided.

82. 发明专利

JP2000169229A PIEZOELECTRIC MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JP2000169229A
公开(公告)日：2000-06-20
申请号：JP16787399
申请日：1999-06-15
申请人： NISSAN MOTOR
发明人： AKIMUNE YOSHIO , MUNAKATA FUMIO , SHINOHARA MIKIYA
IPC分类号： H01L41/09 , C04B35/00 , C04B35/495 , H01L41/187 , H01L41/39 , H01L41/43 , H01L41/24
摘要： PROBLEM TO BE SOLVED: To provide a piezoelectric material not including toxic lead ingredients such as PZT, and excellent in piezoelectric characteristics. SOLUTION: This method for producing a piezoelectric material is to add 0.5-3.0 wt.% at least one kind of oxides of rare earth elements selected from the group consisting of Y2O3, La2O3, Dy2O3, Nd2O3, Sm2O3, Er2O3, GdO3, Pr6O11 as ingredients for improving characteristics to a polycrystalline piezoelectric compound having a chemical composition of the formula Sr2-xCaxNaNb5O15 [wherein, (x) is 0.05-0.35]. The production method comprises (1) a mixing process for porcelain raw materials, (2) a synthesizing process, (3) a crushing process, (4) a molding process and (5) a sintering process. A firing condition in the synthesizing process is conducted e.g. in the air at 1,050-1,150 deg.C for 2-12 h. A firing condition in the sintering process e.g. comprises the first firing step carried out in the air at 1, 180-1,270 deg.C for 4-8 h. and the second firing step carried out at 1,370-1,400 deg.C for 10-75 h.

83. 发明专利

JPH11204847A LAMINATED PIEZO-ELECTRIC ACTUATOR 失效
公开(公告)号：JPH11204847A
公开(公告)日：1999-07-30
申请号：JP203298
申请日：1998-01-08
申请人： NISSAN MOTOR , KYOCERA CORP
发明人： SHINOHARA MIKIYA , ICHIKAWA SATOSHI , ONIZUKA KATSUHIKO
IPC分类号： H01L41/083
摘要： PROBLEM TO BE SOLVED: To provide a laminated piezo-electric actuator having security of insulation reliability between inner and outer electrodes, and having high area availability of the piezo-electric element. SOLUTION: This actuator has a structure that a plate shaped piezoelectric element 2 and a metal plate 3 provided with a electric connection piece 3E are laminated each other. The electrical connection piece 3E of the metal 3 is alternately projected from between the piezo-elements 2 to the same direction and is electrically connected with the electrical connection piece 3E projected to the same direction and set as outer electrodes 6A, 6B. And the laminated body 4 of a quadrangular prism is formed with the outer electrodes 6A, 6B at each corner of a laminated piezo-electric actuator 1 covered with a resin.

84. 发明专利

JPH11189853A SUPERMAGNETOSTRICTIVE ELEMENT AND ITS PRODUCTION 失效
公开(公告)号：JPH11189853A
公开(公告)日：1999-07-13
申请号：JP35817497
申请日：1997-12-25
申请人： NISSAN MOTOR
发明人： FUJIKI AKIRA , SHINOHARA MIKIYA
IPC分类号： G01L1/12 , B22F3/08 , B22F9/10 , C22C33/02 , C22C45/02 , H01L41/12 , H01L41/20
摘要： PROBLEM TO BE SOLVED: To obtain an element high in detecting efficiency of magnetostriction and to attain practical stress detecting sensitivity as an element of a magnetostrictive sensor by obtaining an amorphous Fe-Dy-To based powder composed of a Fe-Dy-To based component composition and solidifying. SOLUTION: Each metallic powder of Fe, Dy and To is charged into a high energy mill or a high speed ball mill with blade in a prescribed ratio and is milled. Or a molten metal of an alloy composed of a Fe-Dy-Tb based component composition alloyed in a prescribed ratio is made to fall down on the circumference of a rotary cooling roll made of copper or the like to be cooled and to obtain a ribbon like foil body and pulveirized or is made to fall down on a rotary disk plate and cooled while scattering. The amorphous Fe-Dy-To based powder obtained in this way is molded by a mechanical press and solidified by plasma-sintering or by impact solidification method by explosive, detonation or gas gun. The element is used also as a load sensor capable of measuring up to high load range.

85. 发明专利

JPH11180769A PIEZOELECTRIC CERAMIC MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH11180769A
公开(公告)日：1999-07-06
申请号：JP35154397
申请日：1997-12-19
申请人： NISSAN MOTOR
发明人： AKIMUNE YOSHIO , SHINOHARA MIKIYA
IPC分类号： C04B35/46 , C04B35/462 , H01L41/187 , H01L41/39 , H01L41/43 , H01L41/24
摘要： PROBLEM TO BE SOLVED: To produce the piezoelectric ceramic material hardly causing a discharge of lead compd. at the production stage, free from lead compd. in dust when the material is discarded after being used for a product and capable of designing at a circuit by reducing dielectric constant which had been seen in conventional PZT. SOLUTION: After adding BaTiO3 to Bi0.5 Na0.5 TiO3 being a base, Bi0.5 Na0.5 or Ba element is substituted with rare earth compd. and the material is subjected to synthetic reaction at 750-850 deg.C for 4-12 hr, and after grinding the material to 0.5-0.8 μm particle size, the material is sintered at 1150-1200 deg.C for 2-12 hr to obtain the piezoelectric ceramic material free from lead and excellent in piezoelectric characteristic.

86. 发明专利

JPH1174577A LAMINATED PIEZOELECTRIC ACTUATOR 失效
公开(公告)号：JPH1174577A
公开(公告)日：1999-03-16
申请号：JP23462597
申请日：1997-08-29
申请人： KYOCERA CORP , NISSAN MOTOR
发明人： INAGAKI MASANAGA , ONIZUKA KATSUHIKO , SHINOHARA MIKIYA , ICHIKAWA SATOSHI
IPC分类号： F02M51/06 , H01L41/083 , H02N2/00
摘要： PROBLEM TO BE SOLVED: To provide a laminated piezoelectric actuator wherein occurrence of stress at a protruding part is suppressed to low and occurrence of metal fatigue due to repeated dislocation action at the protruding part is suppressed. SOLUTION: A metal plate 5 having, respectively, a protruding part 7 for connection is inserted between a plurality of laminated piezoelectric plates 1, the protruding parts 7 are positioned in specified direction alternately, the protruding part 7 is bent in lamination direction of the piezoelectric plate 1 so as to form a void 11 to the outer peripheral surface of the laminated piezoelectric plate 1, an arch-like bending part 13 is formed on its tip end side, and a part of the protruding part 7 closer to the tip end side than the bending part 13 is connected to the other protruding part 7 positioned in the same direction for absorbing a stress by the bending part 13.

87. 发明专利

JPH10190083A LAMINATED PIEZO-ELECTRIC ACTUATOR 失效
公开(公告)号：JPH10190083A
公开(公告)日：1998-07-21
申请号：JP35589796
申请日：1996-12-25
申请人： NISSAN MOTOR
发明人： SHINOHARA MIKIYA , UOZUMI TETSUO , ICHIKAWA SATOSHI
IPC分类号： H01L41/083 , H02N2/00
摘要： PROBLEM TO BE SOLVED: To provide a high durability piezo-electric actuator which insulates the space between an inside electrode and an outside electrode without employing the constitution that coats the inside electrode exposed on a side surface with a glass insulating layer whose thickness is some tens μm. SOLUTION: In this actuator, piezo-electric ceramic boards 1 and inside electrode conductors 2a and 2b are alternately laminated, thereby forming a laminated body 3. On the side surfaces, there are provided a pair of outside electrode conductors 4a and 4b. As for the inside electrode 2a, one end of the electrode is exposed for every one layer on the side surface of the laminated body 3 and connected to the outside electrode 4a. The other end of the inside electrode 2a is not exposed on the side surface of the laminated body 3 and insulated with the outside electrode 4b. A blank space is provided on an insulated part A with the inside electrode conductor 2a and the outside electrode conductor 4b where insulating walls 5a and 5b and an insulating layer 6 are provided in this space.

88. 发明专利

JPH09210815A TORQUE SENSOR AND POWER STEERING APPARATUS USING THE TORQUE SENSOR 失效
公开(公告)号：JPH09210815A
公开(公告)日：1997-08-15
申请号：JP3420496
申请日：1996-01-30
申请人： NISSAN MOTOR
发明人： MINEGISHI EIJI , SHINOHARA MIKIYA
IPC分类号： G01L3/10 , B62D5/04 , B62D5/06
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive and compact torque sensor and a power steering apparatus which can decrease a temperature dependency and be formed in one body with a rotating angle sensor. SOLUTION: In this torque sensor, shafts 1 and 2 are coupled by a torsion bar 3 to be rotated relatively, and rotatably supported by a cylindrical case 4. A multipolar magnet 5 of a ring shape is concentrically fixed with the shaft 2 at the outer circumference of an end part of the shaft 2. A Hall device 6 is fixed to face the multipolar magnet 5 at the outer circumference of an end part of the shaft 1. A temperature compensation yoke 7 is set at the side of a rear face of the Hall device 6 facing the multipolar magnet 5.

89. 发明专利

JPH09203673A TORQUE SENSOR, TORQUE DETECTING METHOD AND POWER STEERING DEVICE 失效
公开(公告)号：JPH09203673A
公开(公告)日：1997-08-05
申请号：JP3015396
申请日：1996-01-25
申请人： NISSAN MOTOR
发明人： SHINOHARA MIKIYA
IPC分类号： G01L3/10 , B62D5/04
摘要： PROBLEM TO BE SOLVED: To provide a torque sensor, wherein the torque detecting characteristic has a similar curvature change as an auxiliary steering force characteristic and the formation of a unitary body together with a steering angle sensor is easy, the torque detecting method and a compact and low-cost power steering device. SOLUTION: In a torque sensor, a shaft 1 and a shaft 2 are linked by a torsion bar 3 so that the shaft can be relatively rotated. Both shafts are supported by a cylindrical case 4 freely rotably. At the outer surface of the end part of the shaft 2, a ring-shaped multipolar magnet 5 is fixed in the concentric pattern with the shaft 2. At the outer surface of the end part 1, a Hall element 6 is fixed so as to face the multipolar magnet 5. A yoke 7 is fixed in the vicinity of the boundary of the NS poles of the multipolar magnet 5. When the torque is not applied, the magnetic flux from the multipolar magnet 5 passes in parallel on the magnetism sensing surface of the Hall element 6. When the large torque is applied, the magnetic flux passes approximately vertically. This is the torque detecting method, wherein these operations are performed. This power steering device has the above described torque sensor.

90. 发明专利

JPH07294346A TORQUE SENSOR 失效
公开(公告)号：JPH07294346A
公开(公告)日：1995-11-10
申请号：JP9230994
申请日：1994-04-28
申请人： NISSAN MOTOR
发明人： SHINOHARA MIKIYA , SHIMADA MUNEKATSU
IPC分类号： G01L3/10 , B62D5/04 , B62D5/06 , G01L5/22
摘要： PURPOSE:To suppress scattering of torque detection sensitivity without accurate positioning between cylindrical cores by forming teeth on the peripheral surface of the cylindrical cores in its axial direction. CONSTITUTION:At the end of a steering side shaft 1, a first and a second cores 4, 5 are pressed and fixed in the state touching to each other end surfaces. At the steering mechanism side shaft 2 end, a third cylindrical core 6 is pressed and fixed in the state touching at the end surface to that of the core 4. The teeth 4a, 5a, 6a formed on the peripheral surfaces of the cores 4, 5, 6 are supported in rotational positions gearing with half width of teeth to each other. When alternating current is supplied to a temperature compensation coil 10 and a magnetically coupling coil 11, the coil 10 electromagnetically couples with the cores 4 and 5 and the coil 11 with the cores 4 and 6. When a torque is impressed on the shaft 1, the area of the facing part of the teeth 4a and 6a facing to each other varies, the magnetic resistance between the cores 4 and 6 varies and thus the impedance of the coil 11 varies. This variation is output as sensor signal.

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