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公开(公告)号：AU3826489A
公开(公告)日：1990-02-22
申请号：AU3826489
申请日：1989-07-19
Applicant: TORAY INDUSTRIES
Inventor： HASHIMOTO NOBUO , SUZUKI KUNIOKI , SAIJO TERUAKI
Abstract: A method of measuring a profile of an object wherein an ultrasonic wave is radiated from an ultrasonic transducer toward an object supported by a supporting member in the water filled in a water tank, and a wave reflected at the surface of the object is detected by the transducer, and an apparatus for carrying out the method. A traversing device moves the transducer sequentially to a plurality of measurement points on an arc equidistant from a predetermined rotational center while opposing the transducer to the predetermined rotational center. A supporting device moves the supporting member relative to the transducer and sets the object in the predetermined position under water. A control device delivers a drive signal to the traversing device to move the transducer sequentially to the measurement points, causes the transducer to radiate an ultrasonic wave when the transducer is in each of the measurement points, calculates a distance between the transducer and the surface of the object in accordance with a difference between the time the transducer radiates the ultrasonic wave and the time transducer receives the wave reflected at the surface of the object, calculates coordinates of each of the measurement points, and coordinates of the surface of the object corresponding to each of the measurement points from the calculated distance, and obtains the profile of the object from the calculated coordinate of the surface of the object at each of the measurement points.
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公开(公告)号：AU612868B2
公开(公告)日：1991-07-18
申请号：AU3826489
申请日：1989-07-19
Applicant: TORAY INDUSTRIES
Inventor： HASHIMOTO NOBUO , SUZUKI KUNIOKI , SAIJO TERUAKI
Abstract: A method of measuring a profile of an object wherein an ultrasonic wave is radiated from an ultrasonic transducer toward an object supported by a supporting member in the water filled in a water tank, and a wave reflected at the surface of the object is detected by the transducer, and an apparatus for carrying out the method. A traversing device moves the transducer sequentially to a plurality of measurement points on an arc equidistant from a predetermined rotational center while opposing the transducer to the predetermined rotational center. A supporting device moves the supporting member relative to the transducer and sets the object in the predetermined position under water. A control device delivers a drive signal to the traversing device to move the transducer sequentially to the measurement points, causes the transducer to radiate an ultrasonic wave when the transducer is in each of the measurement points, calculates a distance between the transducer and the surface of the object in accordance with a difference between the time the transducer radiates the ultrasonic wave and the time transducer receives the wave reflected at the surface of the object, calculates coordinates of each of the measurement points, and coordinates of the surface of the object corresponding to each of the measurement points from the calculated distance, and obtains the profile of the object from the calculated coordinate of the surface of the object at each of the measurement points.
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公开(公告)号：JPH04147027A
公开(公告)日：1992-05-20
申请号：JP27098890
申请日：1990-10-09
Applicant: TORAY INDUSTRIES
Inventor： TAKEDA SHUZO , KATO TOMIO , HASHIMOTO NOBUO
Abstract: PURPOSE:To enable flow to be detected highly accurately by forming two piezoelectric element-holding surfaces in a pair which hold a piezoelectric element on a slant surface. CONSTITUTION:A piezoelectric element 102 is formed as merely a circular flat film before assembly. Also, with two holders 108 and 109 in a pair, piezoelec tric element holding surfaces 108a and 109a are formed in a same direction on a slanted surface at a same angle. Therefore, when the element 102 is held by the holders 108 and 109, a circular edge part of the element 102 is forced to be deformed along the slanted surfaces 108a and 109a and the entire element 102 is extended in diaphragm state, thus enabling the element 102 to be produced easily and flow to be detected highly accurately with high sensitivity.
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公开(公告)号：JPH0252225A
公开(公告)日：1990-02-21
申请号：JP20336688
申请日：1988-08-16
Applicant: TORAY INDUSTRIES
Inventor： SAIJO TERUAKI , HASHIMOTO NOBUO , SAKAKURA NOBUO
IPC: G01H5/00
Abstract: PURPOSE:To accurately measure the sonic velocity of an ultrasonic wave which is propagated in a material body to be measured even if the material body is a soft material body by detecting the reflected wave of the ultrasonic wave on the surface and the back surface of the material body and obtaining the thickness of the material body and the propagating time of the ultrasonic wave in the material body. CONSTITUTION:The material body 3 to be measured is placed on a reference surface separated from an ultrasonic transducer(TD) 1 by a known distance. By detecting the reflected wave on the surface of the material body 3, a distance from the TD 1 to the surface of the material body 3 can be obtained. Therefore, the thickness of the material body to be measured can be obtained by subtracting the measured distance from the known distance. The propagating time of the ultrasonic wave in the material body to be measured can be obtained from the time difference of the reflected wave on the surface and the back surface which is received by the TD 1. By dividing the obtained thickness by the propagating time, the sonic velocity in the material body to be measured can be obtained.
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公开(公告)号：JPH0252211A
公开(公告)日：1990-02-21
申请号：JP20336288
申请日：1988-08-16
Applicant: TORAY INDUSTRIES
Inventor： HASHIMOTO NOBUO , SUZUKI KUNIOKI , SAIJO TERUAKI
Abstract: PURPOSE:To measure the shape of a material body to be measured by emitting an ultrasonic wave toward the center of rotation from an ultrasonic transducer(TD) every measuring point on a circular arc and receiving the reflected wave on the surface and/or the back surface of the material body. CONSTITUTION:The ultrasonic wave emitted from the TD 1 toward the center of rotation O every measuring point on the circular arc 5 is propagated under water and reaches the surface of the material body 3 to be measured. It is reflected on the surface of the material body 3 and also made incident on the inner part thereof, then it is reflected on the back surface of the material body 3 to return TD 1. A distance between the TD 1 and the material body 3 and a distance between the TD 1 and the back surface of the material body 3 can be obtained based on a time from emitting the ultrasonic wave to receiving the reflected wave on the surface of the material body 3 and a time from emitting the ultrasonic wave to receiving the reflected wave on the back surface of the material body 3 respectively. By previously obtaining a distance between the TD 1 and the center of rotation O, the respective intersections of a line combining the TD 1 and the center of rotation O with the surface and the back surface of the material body 3 can be detected from both distances. Therefore, the shape of the material body 3 can be measured by successively detecting the respective positions of the surface and the back surface of the material body 3.
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Patent Agency Ranking
公开(公告)号：JPH0252209A
公开(公告)日：1990-02-21
申请号：JP20336888
申请日：1988-08-16
Applicant: TORAY INDUSTRIES
Inventor： SAKAKURA NOBUO , SAIJO TERUAKI , HASHIMOTO NOBUO
Abstract: PURPOSE:To make the advancing direction of an emitted ultrasonic wave coincident at the center of rotation by fixing an ultrasonic transducer on a turning position where the intensity of a reflected wave becomes maximum or the propagation distance of the ultrasonic wave becomes minimum. CONSTITUTION:A reference measuring jig arranged concentrically with the center of rotation O has, for example, a columner shape. When the sonic axis of the ultrasonic wave emitted from the ultrasonic transducer(TD) 1 is not coincident at the center of rotation O, the advancing direction of the reflected wave which is reflected on the surface of the reference measuring jig does not turn to the center of the TD 1 and the intensity of the reflected wave received by the TD 1 becomes small and the propagation distance of the ultrasonic wave becomes large. When the turning position where the maximum intensity of the reflected wave or the minimum propagation distance of the ultrasonic wave is detected is obtained by turning the TD 1 around the center of the ultrasonic wave emission surface of the TD 1, it is understood that the sonic axis of the TD 1 is perpendicularly crossed on the surface of the reference measuring jig on the turning position and the reflected wave traces a reverse path to be received by the TD 1. Therefore, the advancing direction of the emitted ultrasonic wave is made nearly coincident at the center of rotation by fixing the TD 1 on the turning position.
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公开(公告)号：JPS616429B2
公开(公告)日：1986-02-26
申请号：JP11848678
申请日：1978-09-26
Applicant: Toray Industries
Inventor： NAKANISHI TOSHIHARU , HASHIMOTO NOBUO
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公开(公告)号：JPS5856128B2
公开(公告)日：1983-12-13
申请号：JP11892178
申请日：1978-09-27
Applicant: Toray Industries
Inventor： NAKANISHI TOSHIHARU , HASHIMOTO NOBUO
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公开(公告)号：JPS56102199A
公开(公告)日：1981-08-15
申请号：JP503380
申请日：1980-01-19
Applicant: TORAY INDUSTRIES
Inventor： HASHIMOTO NOBUO
IPC: H04R17/00
Abstract: PURPOSE:To enable to supply maximum power to ultrasonic wave transducer TRD by connecting a series circuit consisting of resistance and inducatance to TRD in parallel and attaching an impedance matching transformer to TRD. CONSTITUTION:In case of ultrasonic wave TRD consisting of electroacoustic transducer element 14 including a macromolecule piezoelectric film, series circuit 13 consisting of inductance L1 and resistance R1 is connected to element 14 in parallel and impedance matching transformer 12 is connected between connector 11 and element 14. When the resistance and capacity of element 14 at the operational center frequency decided by the constitution of element 14 are denoted R and C respectively and then R1 and L1 are selected so as to be R=R1=(L1/C) = input impedance, the impedance of load seen from the secondary coil of transformer 12 becomes pure resistance R. If the winding ratio of transformer 12 is decided so as to match the cable connected to connector 11, characteristic impedance including power source and resistance, maximum power can be supplied to TRD from power source and a reflected signal converted electrically with TRD can be transferred without distortion.
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公开(公告)号：JPS5544671A
公开(公告)日：1980-03-29
申请号：JP11848678
申请日：1978-09-26
Applicant: TORAY INDUSTRIES
Inventor： NAKANISHI TOSHIHARU , HASHIMOTO NOBUO
Abstract: PURPOSE:To reduce the occurrence frequency of the crosstalk by securing reproduction of the mark information at the different positions from each other for the adjacent pages of the optical recording medium which records the information and the mark information in the munus unit. CONSTITUTION:In case the reproduction is given to the information within each page on optical recording medium 11, center position X and Y coordinate position of the page are referred to as, for example, X0 and Y0, along with the X and Y coordinates at the center position of the light set up at the reproduction starting time referred to as X1 and Y1 respectively. Thus the deflecting amount of light deflector 2 is set to such initial value as to secure the inequalities of X0>X1 and Y0>Y1. The deflecting amount to receive the initial set is decided based on the X and Y coordinate position signals which are supplied to light deflection driving circuits 29 and 30 to the X and Y directions each. Then the mark information within the minus unit is detected. And based on the detection signal, the correction is given to the deflecting amount in the X and Y directions of deflector 2 to secure the coincidence for center position between the munus unit and the light. In such way, the occurrence frequency can be reduced for the crosstalk.
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