专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明专利

JP2003124011A ELECTROMAGNETIC WAVE ABSORBER AND PRODUCT USING THE SAME 审中-公开
公开(公告)号：JP2003124011A
公开(公告)日：2003-04-25
申请号：JP2001310845
申请日：2001-10-09
申请人： HITACHI LTD
发明人： FUJIEDA TADASHI , HIDAKA KISHIFU , SUZUKI SHUICHI , IKEDA SHINZO , HAYASHIBARA MITSUO
IPC分类号： G02B6/42 , H01F1/00 , H01F1/14 , H05K1/02 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorber that can be used over a wide range from a quasi-milliwave region to a milliwave region and has a superior electromagnetic wave absorbing characteristics, and to provide a product using the absorber. SOLUTION: The electromagnetic wave absorber is obtained by scattering carbon nanotubes carrying an element which can improve crystallinity and can reveal magnetism in a material having a high electric resistivity. When this material is used in a device, the electromagnetic wave interference can be suppressed in the device. Therefore, this material can be used for electronic devices, optical transmission-reception modules, high-frequency communication equipment, non-stop automatic tollgate systems, etc.

32. 发明专利

JP2002071726A VOLTAGE SENSOR 失效
公开(公告)号：JP2002071726A
公开(公告)日：2002-03-12
申请号：JP2000263252
申请日：2000-08-28
申请人： HITACHI LTD
发明人： HAYASHIBARA MITSUO , WATANABE MASAHIRO , KATO KAZUO , TANI MASAYUKI , OGAWA KENJI
IPC分类号： G01R15/06 , G01R19/00
摘要： PROBLEM TO BE SOLVED: To provide a voltage sensor which can measure a voltage (potential) of a measurement object highly accurately in a non-contact and nongrounding manner without an operation of setting and separating the sensor to the measurement object even when a stray capacity between the sensor and the ground is unknown. SOLUTION: In the non-contact voltage sensor for measuring the voltage of the measurement object without bringing a conductive object into direct contact with the measurement object, a voltage or a current from the sensor is overlapped with a voltage of the measurement object to a voltage reference point or with a current flowing in the measurement object, and the overlapped voltage or current applied to a circuit part connected electrostatically to the measurement object and connected electrostatically via the stray capacity to the voltage reference point is detected, whereby the voltage of the measurement object is measured.

33. 发明专利

JP2001255342A VOLTAGE SENSOR 失效
公开(公告)号：JP2001255342A
公开(公告)日：2001-09-21
申请号：JP2000068616
申请日：2000-03-08
申请人： HITACHI LTD
发明人： HAYASHIBARA MITSUO , KUBO OSAMU , WATANABE MASAHIRO
IPC分类号： G01R15/06 , G01R19/00
摘要： PROBLEM TO BE SOLVED: To provide a non-contact/non-grounding type sensor for accurately measuring the voltage with respect to ground even if the floating capacitance between the sensor and the ground is unknown. SOLUTION: A voltage sensor 10 is connected to an electrode 3 that is provided around a covering 5 for surrounding a conductor 4 of a transmission line. The voltage sensor 10 for transmission lines consists of a voltage detection circuit 1 and a voltage detector 2 for detecting a voltage that is applied to the voltage detection circuit 1. The voltage detection circuit 1 can change the capacitance of the voltage detection circuit 1 itself. The voltage detector 2 detects a voltage that is applied to the voltage detection circuit 1 (1), and the voltage detection circuit 1 creates a different static electricity state (2). The voltage detector (2) detects a voltage that is applied to the voltage detection circuit 1 (3), and repeats (2) and (3) being adjusted to the number the unknown number of an equivalent circuit, thus obtaining a voltage with respect to the ground (4).

34. 发明专利

JP2000161175A INJECTOR AND FUEL INJECTION SYSTEM 失效
公开(公告)号：JP2000161175A
公开(公告)日：2000-06-13
申请号：JP33527098
申请日：1998-11-26
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HAYASHIBARA MITSUO , OSUGA MINORU , NOGI TOSHIJI , SHIRAISHI TAKUYA , OKAMOTO YOSHIO , TANABE YOSHIYUKI , HAMADA YASUHISA
IPC分类号： F02M51/06 , F02M61/10 , F02M61/16
摘要： PROBLEM TO BE SOLVED: To improve the high-speed responsiveness by providing a piezoelectric element of solid structure for driving a plunger and a bulkhead for isolating the piezoelectric element from fuel, and arranging a fuel inlet part to an injector in a position backward from the piezoelectric element when seen from the plunger. SOLUTION: A laminated type solid element is used as a piezoelectric element 11, the piezoelectric element 11 is supported by a movable member (damper) 16, and the piezoelectric element 11 and the movable member 16 are arranged in the area filled with high viscosity silicone oil, which is surrounded by inner pipes 12, 31 and a diaphragm (bulkhead) 15. Fuel is supplied from a fuel inlet part 33 arranged backward from the piezoelectric element 1 to the tip of an injector through a part between outer pipes 13, 32 forming the housing and the inner pipes 12, 31 and through a fuel through-hole 19. A plunger 14 is pressed onto the injector tip by the extending motion of the piezoelectric element 11 to close it, and the plunger 14 is further moved by the force of a spring 25 by the contracting motion of the piezoelectric element 1 to open it.

35. 发明专利

JP2000150977A PIEZOELECTRIC DEVICE AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2000150977A
公开(公告)日：2000-05-30
申请号：JP31431098
申请日：1998-11-05
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HAYASHIBARA MITSUO , ISHIDA TOMIO , SUZUKI HIDEO , SHIONO OSAMU , MIYATA MOTOYUKI , WATABIKI SEIJI , OSUGA MINORU , SHIRAISHI TAKUYA , TANABE YOSHIYUKI , HAMADA YASUHISA
IPC分类号： H01L41/083
摘要： PROBLEM TO BE SOLVED: To provide a piezoelectric device which is capable of realizing a large dynamic range as an injector. SOLUTION: An electrode is formed on all the sides of piezoelectric material bodies 1 vertical to the direction of lamination for the formation of a piezoelectric device, where sintered bodies which are each composed of a piezoelectric material and inner electrodes 2 are jointed together in one piece in the direction of lamination, an electrically insulated layer 3 is provided to the one edge face of each inner electrode, the other ends of the inner electrodes 2 that are not covered with the electrical insulating layer 3 are electrically connected with an external electrode 4, and a lead wire 5 is provided to the external electrode 4 or a certain part connected electrically to the outer electrode 4.

36. 发明专利

JP2000077733A Laminated piezoelectric element 审中-公开
标题翻译：层压压电元件
公开(公告)号：JP2000077733A
公开(公告)日：2000-03-14
申请号：JP24133998
申请日：1998-08-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIYATA MOTOYUKI , SHIONO OSAMU , HAYASHIBARA MITSUO , SUZUKI HIDEO , WATABIKI SEIJI , ISHIDA TOMIO
IPC分类号： G01L1/16 , H01L41/083
摘要： PROBLEM TO BE SOLVED: To improve reliability of a laminated piezoelectric element extending over a long period even under a high temperature, by a method wherein piezoelectric materials having a piezoelectricity and internal electrodes having a conductivity are alternately laminated to form integrally the piezoelectric materials, and the internal electrodes and stress relaxation layers are respectively formed on the vertical side surfaces of the laminated material in the lamination direction.
SOLUTION: Piezoelectric materials 1 having a piezoelectricity and internal electrodes 2 having a conductivity are alternately laminated to form integrally the materials 1, the external electrodes 2 is connected to and the eternal electrodes 2 every other layer, and lead wires 4 are respectively connected with these electrodes 3. Moreover, stress relaxation layers 5, which are provided mixedly an inorganic porous material containing an silicon oxide as its main component with a conductive material containing conductive grains, such as silver grains palladium grains, are respectively formed between the materials 1 and the electrodes 3, between the electrodes 2 and the electrodes 3 and between insulating layers 8 formed on the electrodes 2 and the electrodes 3. As a result, even in the case where a laminated piezoelectric element is used extending over a long period under a high voltage, the reliability of the piezoelectric element can be improved.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：为了提高即使在高温下长时间延伸的层叠型压电元件的可靠性，也可以通过将具有压电性的压电材料和具有导电性的内部电极交替层叠以形成压电材料的方法，在叠层材料的层叠方向的垂直侧面分别形成内部电极和应力缓和层。解决方案：具有压电性的压电材料1和具有导电性的内部电极2交替层压以形成材料1，外部电极2每隔一层连接到外部电极2，并且引线4分别与这些连接此外，在材料1和第一电极3之间分别形成应力松弛层5，它们以含有氧化硅为主要成分的无机多孔材料和含有导电颗粒的导电材料（例如银粒子钯颗粒）混合提供。电极3之间，电极2和电极3之间以及形成在电极2和电极3上的绝缘层8之间的电极3。结果，即使在使用层叠型压电元件在高电压下长时间延伸的情况下可以提高压电元件的可靠性。

37. 发明专利

JPH09310655A FUEL INJECTION DEVICE 失效
公开(公告)号：JPH09310655A
公开(公告)日：1997-12-02
申请号：JP12536196
申请日：1996-05-21
申请人： HITACHI LTD
发明人： HAYASHIBARA MITSUO , TANAKA SHIGERU , SHIONO OSAMU , KANEDA JUNYA
IPC分类号： F02M51/00 , F02D41/20 , F02M51/06
摘要： PROBLEM TO BE SOLVED: To release shock applied on a piezoelectric element with a simple structure, and improve reliability and durability of the piezoelectric element by controlling voltage applied on the piezoelectric element on the basis of a current value which flows the piezoelectric element, in a fuel injection device having a valve element which performed reciprocating motion in association with the distortion motion of the piezoelectric element. SOLUTION: At the time of start, voltage is applied from the power supply circuit 6 of a control circuit 23 on a piezoelectric element 2, the piezoelectric element 2 extends for about 0.5 seconds while compressing a spring 3. Applying voltage of the piezoelectric element is set to 0V instantly, and thereby, piezoelectric element 2 is reverted in a natural length at about 10 seconds. At this time, the spring constant of the spring 3 is selected suitably, and a damper 22 is weighted, and thereby, it is not followed with rapid contracting motion of the piezoelectric element 2, and acted as a fixing end of the piezoelectric element 2. A plunger 1 which is a comparative light weight is lifted up by contraction of the piezoelectric element 2, fuel is injected. After fuel is injected, the plunger 1 descends by extending motion of the piezoelectric element 2 so as to shut-out fuel injection.

38. 发明专利

JPH09250836A THERMOELECTRIC CONVERTER 失效
公开(公告)号：JPH09250836A
公开(公告)日：1997-09-22
申请号：JP5880896
申请日：1996-03-15
申请人： HITACHI LTD
发明人： YOSHIOKA CHIKAKO , HAYASHIBARA MITSUO
IPC分类号： H01L35/30 , F25B21/02 , H01L35/32
摘要： PROBLEM TO BE SOLVED: To provide a small-sized apparatus not including a separate fan by constructing the apparatus into an annular structure and providing a good thermal conductor having a fan blade on a heat absorption surface and on a heat dissipation surface. SOLUTION: This thermoelectric converter 1 is constructed into an annular shape. In the thermoelectric converter 1, N and P semiconductor devices 12a and 12b, both a thermoelectric element, are alternately disposed into a plurality of layers which are in turn put between metal plate electrodes 13, 13 and welded with solder. An electric insulator 15 is mounted on one end of the metal plate electrode 13 not in contact with the P and N semiconductors 12a and 12b, and a good thermal conductor 16 is provided. The good thermal conductor 16 is a structure having inner and outer air fan blades 161, facing each other. The thermal conductor 16 is provided which has the fan blades 161 on the heat absorption surface and the heat dissipation surface of the thermoelectric converter, and the cylindrical apparatus is rotated for heat exchange whereby the apparatus is small sized without requiring the separate provision of an air fan.

39. 发明专利

JPH07253264A REFRIGERATOR 失效
公开(公告)号：JPH07253264A
公开(公告)日：1995-10-03
申请号：JP4679894
申请日：1994-03-17
申请人： HITACHI LTD
发明人： HAYASHIBARA MITSUO , KOYANAGI ASAKO , HATAMIYA SHIGEO
IPC分类号： F25D11/00 , F25B21/02 , F25D17/04
摘要： PURPOSE:To increase an inner volume of a refrigerator and to enable a cooling system having no noise to be constructed by a method wherein a thermal insulating wall composed of a thermal insulating material filled between Peltier effect elements and thermal conducting material installed at the Peltier effect elements is applied as a part of the refrigerator. CONSTITUTION:A thermal insulating wall is formed by Peltier effect elements 14 electrically connected from each other, thermal insulating material 17 filled between the Peltier elements 14, and thermal conducting members 11, 18 installed at both or one of a high temperature side and a low temperature side of each of the Peltier elements 14 through electrical insulators 12, 16 and then this thermal insulating wall is used at a part of the refrigerator. Due to this fact, thermal energy collected at the high temperature side of each of the Peltier elements 14 can be dispersed by the thermal conductors 11, 18 and a thermal radiation with a static means such as natural convection can be attained. In addition, a thickness of this thermal insulating wall can be locally changed. With such an arrangement as above, it is possible to increase an inner volume of the refrigerator and at the same time it is possible to constitute a freezing system having no noise due to no presence of movable elements.

40. 发明专利

JPH0779019A THERMOELECTRIC TRANSDUCER 失效
公开(公告)号：JPH0779019A
公开(公告)日：1995-03-20
申请号：JP22327293
申请日：1993-09-08
申请人： HITACHI LTD
发明人： KOYANAGI ASAKO , HAYASHIBARA MITSUO
IPC分类号： H01L35/28
摘要： PURPOSE:To cool or heat an external heat medium by a method wherein a thermoelectric transducer in which the two ends of a thermoelectric material are brought into contact with two heat sources having different temperatures and the two ends are connected to each other with an electrode to apply a current to the thermoelectric material with its own thermoelectromotive force is provided and a heat exchange means by which heat is exchanged between the thermoelectric transducer and an external heat medium is provided in a part of the thermoelectric transducer. CONSTITUTION:The two ends of a thermoelectric material 1 are connected to each other with an electrode 5 and the two ends are brought into contact with a high temperature heat source 10 and a low temperature heat source 11 respectively. At that time, a thermoelectromotive force is generated in the thermoelectric material 1 and a current is applied to the thermoelectric material 1 through the electrode 5 to produce heat absorption or heat generation by a Thomson effect. A pipe 21 through which heat medium 20 flows is brought into contact with a part of a thermoelectric transducer to exchange heat between the transducer and the heat medium 20. With this constitution, the heat medium 20 can be cooled or heated without a current supplied from an external electrode.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式