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81. 发明专利

JPH04254754A ULTRASONIC THREE-DIMENSIONAL IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH04254754A
公开(公告)日：1992-09-10
申请号：JP1634291
申请日：1991-02-07
申请人： HITACHI LTD
发明人： KONDO SHINICHI , NAKATANI CHITOSE , MIWA YUICHI , MASUZAWA YUTAKA , KIKUCHI TAKAFUMI
IPC分类号： A61B8/14 , G01N29/06 , G01N29/22 , G01N29/44 , H04N7/18
摘要： PURPOSE:To realize three-dimensional ultrasonic image pickup of high pickup speed and high resolution by forming simultaneously a number of three- dimensional reception beams being uniform in sensitivity. CONSTITUTION:In a three-dimensional reception focusing means 4, a plurality of three-dimensional reception beams in directions at equal angles to one direction of transmission are formed simultaneously. Since the three-dimensional beams being uniform in sensitivity can be formed in large numbers simultaneously in this constitution, three-dimensional ultrasonic image pickup of high pickup speed and high resolution can be realized.

82. 发明专利

JPH03178645A DRIVING CIRCUIT FOR ULTRASONIC VIDEO DEVICE 失效
公开(公告)号：JPH03178645A
公开(公告)日：1991-08-02
申请号：JP31748989
申请日：1989-12-08
申请人： HITACHI LTD
发明人： ISHIKAWA SHIZUO , MIWA YUICHI , KANDA HIROSHI , SHINOMURA RYUICHI , KATAKURA KAGEYOSHI , NAKATANI CHITOSE , TAKASUGI KAZUO , ANDO MASAAKI , HARA TATSUO
IPC分类号： G01N29/22 , A61B8/00 , G01N29/24 , G01S7/52 , G01S7/524
摘要： PURPOSE:To drive the double phased array transducer by grounding a one-face electrode of the double phased array transducer by a driving circuit having an output stage of a complementary circuit or a P-N push-pull circuit or an NMOS totem pole type circuit, providing it so as to correspond to the electrode by one-to-one and executing the control so that at the time of non-selection, a non-selection electrode is short-circuited or disconnected. CONSTITUTION:A driving circuit is connected to a driving circuit in which both the (a) face and the (b) face correspond to each electrode by one-to-one. A one-face driving circuit is grounded, and by the remaining one-face driving circuit, a scan of an ultrasonic beam is executed and an image is reproduced. In this case, the scan of the ultrasonic beam is the same as a scanning method of a phased array transducer. Also, as for the minor axis variable aperture, the ground electrode can be disconnected by setting Qa and Qb to a turn-off state in a driving circuit 1. Accordingly, when the (a) face becomes a scanning electrode and ground electrodes Eb1-Eb9 are controlled by the (b) face, a receiving area of the minor axis can be changed. Accordingly, the aperture can be varied by disconnecting an unnecessary ground electrode.

83. 发明专利

JPH03155841A ULTRASONIC IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH03155841A
公开(公告)日：1991-07-03
申请号：JP29232989
申请日：1989-11-13
申请人： HITACHI LTD
发明人： MASUZAWA YUTAKA , NAKATANI CHITOSE , TAKEUCHI HIROYUKI , KATAKURA KAGEYOSHI
IPC分类号： G01N29/44 , A61B8/00 , G01N29/22
摘要： PURPOSE:To improve the selectivity of a vibrator and to further enhance the space resolution by providing a circuit means for decreasing the magnitude of an impedance of a bias voltage applying circuit seen from an ultrasonic transmitting/receiving circuit side. CONSTITUTION:A low impedance circuit 14 is connected between a connecting point of each electrode of an electrode array A and a bias voltage switching circuit 13, and a ground point. The bias voltage switching circuit 13 connects the respective electrodes of the electrode array A to a bias voltage applying circuit 12 or a ground. Supposing that the electrode Ai is connected to the bias voltage applying circuit 12, and others are grounded, a transmitting pulse generated by an ultrasonic transmitting/receiving circuit 11 is applied to the electrode Bj selected by a switching and scanning circuit 15, and excites an intersection part to the facing electrode Ai. Thereafter, the transmitting pulse flows mainly through a low impedance circuit connected to Ai.

84. 发明专利

JPS6411534A ULTRASONIC DIAGNOSTIC APPARATUS 失效
公开(公告)号：JPS6411534A
公开(公告)日：1989-01-17
申请号：JP16678987
申请日：1987-07-06
申请人： HITACHI LTD
发明人： TAKEUCHI HIROYUKI , NAKATANI CHITOSE
IPC分类号： H04R23/00 , A61B8/00 , G01N29/04 , G01N29/24
摘要： PURPOSE:To enhance capacity, by separating an ultrasonic wave generating part and a detection part and using a superconductive device in the detection part. CONSTITUTION:An ultrasonic wave generating part 12 and an ultrasonic wave detection part 13 are arranged to the surface of a living body 11 in parallel and bias voltage near to the gap voltage Vg of a superconductor is preliminarily applied to both terminals of a superconductive device and a tunnel current 41 is preliminarily allowed to flow. The ultrasonic pulse emitted from the ultrasonic wave generating part 12 is reflected at the boundary of the internal organ 14 in the living body to reach the ultrasonic wave detection part 13. The tunnel current is flowing to the superconductive device of an ON-state of the ultrasonic wave detection part but, since the tunnel current is extremely sensitive to external force, said current changes when the ultrasonic wave reaches and sound pressure changes. The intensity of the ultrasonic wave can be detected on the basis of the change quantity of the tunnel current. Therefore, when all of superconductive devices arranged two-dimensionally are set to an ON-state, the intensity distribution of the reflected ultrasonic wave can be measured.

85. 发明专利

JPS63288138A TOMOGRAPHIC IMAGE SENSING APPARATUS 失效
公开(公告)号：JPS63288138A
公开(公告)日：1988-11-25
申请号：JP12122387
申请日：1987-05-20
申请人： HITACHI LTD
发明人： NAKATANI CHITOSE
IPC分类号： A61B6/03 , G01N23/04
摘要： PURPOSE:To reduce an exposure dose and to perform high speed measurement, by providing a radiation source for irradiating the partial region of an effective visual field with radiation and a detector group for detecting the transmitted radiation thereof facing each other and obtaining the measuring data of the total region of the effective visual field by rotary scanning. CONSTITUTION:The radiation 102 emitted from a diffusion radiation source 101 is allowed to irradiate the one-half region of an effective visual field 103 and the transmitted radiation from the visual field 103 is measured by a detector group 104. When the detector group 104 is arranged over the total periphery of the visual field, measurement is performed while only the radiation source 101 is rotated by 360 deg. around the center 105 of the visual field 103 in a direction 106. When the detector group 104 is not arranged over the total periphery, measurement is performed while the radiation source 101 is rotated by 360 deg. around the center 105 in the direction 106 in such a state that the relative positions of the radiation source 104 and the detector group are fixed.

86. 发明专利

JPS63195525A ULTRASONIC LEVEL GAUGE 失效
公开(公告)号：JPS63195525A
公开(公告)日：1988-08-12
申请号：JP2630187
申请日：1987-02-09
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： TAKEUCHI HIROYUKI , NAKATANI CHITOSE , KATAKURA KAGEYOSHI , SADAMURA SHIGERU , MARUTA KENJI
IPC分类号： G01F23/296 , G01F23/28 , G01S7/52 , G01S7/521
摘要： PURPOSE:To measure the liquid level in a container which has an optional curved surface with high sensitivity by using a composite piezoelectric body formed by embedding many columnar inorganic piezoelectric bodies in a sheet type organic material at right angles to the sheet surface. CONSTITUTION:A zircon-titanate (PZT) ceramic plate which is polarized uniformly in a thickness direction and, for example, 80mm square and 0.4mm thick is adhered on a ferrite base with electron wax, and this adhered body is cut in a mesh shape at 0.4mm pitch by using a blade which is 0.2mm thick. The sheet type composite piezoelectric body of 0.4mm in thick which is obtained by charging and caking polyurethane in grooves formed by said cutting is separated from the ferrite base by dissolving the electron wax. Then, composite piezoelectric bodies 12 of 10mm square are cut, two-layered films of chromium and gold are adhered on both surfaces as electrodes, and leads are fixed with a conductive adhesive. The obtained element 21 is adhered on the bottom surface of the container 23 which contains liquid and a driving circuit 22 for ultrasonic wave pulse generation is connected. Then liquid surface reflected ultrasonic wave pulses are observed 24 to measure the height of the liquid surface.

87. 发明专利

JPS62247700A PIEZOELECTRIC SPEAKER 失效
公开(公告)号：JPS62247700A
公开(公告)日：1987-10-28
申请号：JP8919886
申请日：1986-04-19
申请人： HITACHI METALS LTD , HITACHI LTD
发明人： ARAI YASUO , SADAMURA SHIGERU , MARUTA KENJI , NAKATANI CHITOSE , TAKEUCHI HIROYUKI , KATAKURA KAGEYOSHI
IPC分类号： H04R17/00
摘要： PURPOSE:To secure generation of sound with high efficiency over a wide frequency band by connecting the side faces of plural columnar piezoelectric bodies with organic matter to obtain a sheet type composite piezoelectric body and providing electrodes on both side of said composite piezoelectric body to drive this body with electroacoustic signals. CONSTITUTION:A PZT ceramics 1 polarized evenly in its thickness direction and having, e.g. a 100mm diameter and 0.5mm thickness is fixed to a flat plate. Then a mesh grooves are formed to the PZT ceramics 1 by a blade with 0.2mm depth and 0.15mm pitches. Then the urethane resin 2 is filled into those grooves and 2 grinding process is applied to the rear side of the substance 1 after the resin 2 is hardened. Thus a composite piezoelectric body 3 is formed. This body 3 is fixed to a ring 4 made of a hard material via a spring ring 5 so that the light tensile stress is applied to the ring 4. The electrodes 6 and 6' are formed on both sides of the body 3 and epoxy resin 8 is laminated on these electrodes as a protecting film. Then lead wire 9 is attached to the sub stance 3 via a conductive adhesive 7. In such a constitution, this piezoelectric speaker can produce acoustic signals with high efficiency over a wide frequency range.

88. 发明专利

JPS62150610A INPUT DEVICE 失效
公开(公告)号：JPS62150610A
公开(公告)日：1987-07-04
申请号：JP29065785
申请日：1985-12-25
申请人： HITACHI LTD , HITACHI METALS LTD , HITACHI MEDICAL CORP
发明人： NAKATANI CHITOSE , TAKEUCHI HIROYUKI , KATAKURA KAGEYOSHI
IPC分类号： H01H13/00 , G06F3/02 , H01L37/02 , H01L41/113 , H01L41/18 , H03K17/96

89. 发明专利

JPS6284697A ULTRASONIC PROBE 失效
公开(公告)号：JPS6284697A
公开(公告)日：1987-04-18
申请号：JP22360685
申请日：1985-10-09
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： TAKEUCHI HIROYUKI , NAKATANI CHITOSE , KATAKURA KAGEYOSHI
IPC分类号： G01N29/26 , A61B8/00 , B06B1/06 , G01N29/04 , G01N29/24 , H04R3/00 , H04R17/00 , H04R17/08
摘要： PURPOSE:To selectively control the transfer efficiency of an electroacoustic transducing part from the outside by using a ferroelectric piezoelectric body whose phase transition temperature lies near room temperature of a high electrostriction material for the electroacoustic transfer part and impressing a bias electric field. CONSTITUTION:For the ferroelectrical piezoelectric body 21 whose phase transition temperature lies near room temperature, a so called PLZT ceramic is used which is obtained by doping lantern La to Zirconium titanate Pb(Zr0.65Ti0.35) O3. The compound obtained by adding La to Pb by 8.5mol is observed to change its phase at about 40 deg.C. If an ultrasonic probe 12 is held at more than 40 deg.C, a part where electrodes face each other becomes piezoelectrically active only when a DC bias electric field is impressed across the hot electrode 25 and the earth electrodes 22-24. Namely, the earth electrode used is selected, whereby an aperture in a short axis direction can be effectively changed.

90. 发明专利

JPS61234199A ULTRASONIC PROBE 失效
公开(公告)号：JPS61234199A
公开(公告)日：1986-10-18
申请号：JP7428985
申请日：1985-04-10
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： UMEMURA SHINICHIRO , KATAKURA KAGEYOSHI , TAKEUCHI HIROYUKI , NAKATANI CHITOSE
IPC分类号： A61B8/00 , G01N29/04 , G01N29/24 , H04R17/00
摘要： PURPOSE:To obtain an acoustic matching layer suitable for a high frequency by using material having a main component of metylol melamine resin as an acoustic matching layer material. CONSTITUTION:The metylol melamine resin has a characteristic good at a molding workability of high polymer material and at the same time and an extremely high acoustic velocity for the high polymer material, so that its acoustic impedance is high and it can be used as the acoustic matching layer material between an electric and acoustic converting material such as piezoelectric ceramics and a medium such as water, a human body without a mixture. An ultrasonic wave emitted to a front surface from an array oscillator 1 composed of the piezoelectric material or the like is transmitted to the medium such water, a human body through an acoustic matching layer 2 composed of metylol melamine resin and the ultrasonic emitted to a rear surface is braked by a rear surface braking member 3. Different from the conventional type acoustic matching layer, it is the matching layer formed without mixing the material difference in the acoustic property, a scattering and attenuation are small with respect to a high frequency ultrasonic and an excellent acoustic characteristic is realized.

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