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1. 发明专利

JPH01227050A METHOD AND APPARATUS FOR MEASURING DENSITY AND OTHERS OF OBJECT 失效
公开(公告)号：JPH01227050A
公开(公告)日：1989-09-11
申请号：JP5150288
申请日：1988-03-07
申请人： HITACHI LTD
发明人： KAWASAKI SATOSHI , KAMATA SHOJI , KANAMORI TAKAHIRO , IZUMI SHIGERU , YABUKI TAKASHI
IPC分类号： G01N23/06 , G01N9/24 , G01N23/203
摘要： PURPOSE:To simplify the measurement of density and density distribution in a plate-shaped object, by setting the direction of application of a gamma ray and the direction of detection of a scattered gamma ray so that a line absorption coefficient and an effective line absorption coefficient of the gamma ray be equal with respect to a primary gamma ray and the scattered gamma ray. CONSTITUTION:An angle 23 at which a primary gamma ray 22 is made to fall from a gamma ray source 20 on a plate-shaped sample 10 and an angle 33 at which a radiation detector 30a detects a scattered gamma ray 32 scattered at a Compton scattering angle 34 in a measuring area 11 are set so that an effective line absorption coefficient of a gamma ray defined by the ratio between a line absorption coefficient of the gamma ray and the cosine of an angle formed by a gamma-ray transmission path and the direction (x) of the thickness of the sample 10 be equal with respect to the primary gamma ray 22 applied to the sample 10 and the scattered gamma ray 32. As for an output of the radiation detector 30a, the scattered gamma ray for a prescribed time set beforehand is counted by a scattered gamma ray counting device 40a and stored in a storage device 50, and as for an output of a radiation detector 30b, the primary gamma ray is counted by a primary gamma ray counting device 40b and sent to a density computation device 60. The density is computed from the intensity of the scattered gamma ray stored in the storage device 50 and from the transmission intensity of the primary gamma ray and outputted to an output device 70.

2. 发明专利

JPS62278500A COLLIMATOR 失效
公开(公告)号：JPS62278500A
公开(公告)日：1987-12-03
申请号：JP12109686
申请日：1986-05-28
申请人： HITACHI LTD
发明人： KAMATA SHOJI , KANAMORI TAKAHIRO
IPC分类号： G21K1/02 , A61B6/03

3. 发明专利

JPS61220629A TWO-DIMENSIONAL TOMOGRAPHIC METHOD AND APPARATUS 失效
公开(公告)号：JPS61220629A
公开(公告)日：1986-09-30
申请号：JP6205385
申请日：1985-03-28
申请人： HITACHI LTD
发明人： KANAMORI TAKAHIRO , KOTANI KOICHI
IPC分类号： G01N23/04 , A61B6/03 , G01N29/06 , G06T1/00

4. 发明专利

JPS61170440A POSITIONING CONTROL SYSTEM OF ROTARY STAND 失效
公开(公告)号：JPS61170440A
公开(公告)日：1986-08-01
申请号：JP908985
申请日：1985-01-23
申请人： HITACHI LTD
发明人： KANAMORI TAKAHIRO , KOTANI KOICHI , KAMATA SHOJI
IPC分类号： G01N23/00 , A61B6/03 , G05D3/12

5. 发明专利

JPS5953555B2 失效
公开(公告)号：JPS5953555B2
公开(公告)日：1984-12-25
申请号：JP11561977
申请日：1977-09-28
申请人： HITACHI LTD
发明人： TAKAHASHI FUMINOBU , KANAMORI TAKAHIRO , SUZUKI KAZUMICHI
IPC分类号： G03H3/00

6. 发明专利

JPS571988A COIL JOINT MONITORING DEVICE 失效
公开(公告)号：JPS571988A
公开(公告)日：1982-01-07
申请号：JP7429180
申请日：1980-06-04
申请人： HITACHI LTD
发明人： KANAMORI TAKAHIRO , ABE MITSUJI , OOTSUKA MICHIO , NISHI MASATSUGU
IPC分类号： H01R4/68 , G21B1/00 , G21B1/11 , H01F5/00 , H01F6/06

7. 发明专利

JPS52123290A DEFECT LENGTH MEASURING DEVICE 失效
公开(公告)号：JPS52123290A
公开(公告)日：1977-10-17
申请号：JP3934776
申请日：1976-04-09
申请人： HITACHI LTD
发明人： TAKAHASHI FUMINOBU , MICHIKUCHI YUEHIRO , SUZUKI KAZUMICHI , KANAMORI TAKAHIRO
IPC分类号： G01B17/00 , G01N29/04 , G01N29/44
摘要： PURPOSE:To measure the length of a defect with the use of an ultrasonic flaw detector of scanning type by counting the drive pulses of a pulse motor during the period while the reflected wave is being detected from the defect with a locator being moved for scanning.

8. 发明专利

JPS52104285A ULTRASONIC REFLECTOSCOPE 失效
公开(公告)号：JPS52104285A
公开(公告)日：1977-09-01
申请号：JP1999876
申请日：1976-02-27
申请人： HITACHI LTD
发明人： MICHIKUCHI YUEHIRO , SUZUKI KAZUMICHI , TAKAHASHI FUMINOBU , KANAMORI TAKAHIRO
IPC分类号： G01N29/38 , G01N29/04
摘要： PURPOSE:To perform the ultrasonic inspection by obtaining the reflected wave from the defect for processing signals.

9. 发明专利

JPH03262947A DEVICE AND METHOD FOR COMPUTER TOMOGRAPHY AND COMPUTER TOMOGRAPHIC SCANNER 失效
公开(公告)号：JPH03262947A
公开(公告)日：1991-11-22
申请号：JP6097590
申请日：1990-03-14
申请人： HITACHI LTD
发明人： KANAMORI TAKAHIRO , ITO SHINICHI
IPC分类号： G01N23/04 , G06T11/00
摘要： PURPOSE:To decrease artifacts without lowering spatial resolution by providing a means which increases the number of translation data before and behind a rotational position where translation data is obtained when the translation data has the sudden change part of transmission data. CONSTITUTION:A CT scanner 10 makes a scan at intervals of DELTAtheta deg. while a radiation source 1 and a detector group 12 are put in the same position relation mutually. Transmission data from the detector group 12 are gathered by a data gathering device 13 and a logarithmic converter 14 calculates a logarithmic conversion value P(t,theta) of I/I0 (I: transmission data, I0: X-ray intensity of the radiation source) from a specific expression. This value P(t,theta) is differentiated by a spatial differentiating device 15. A comparator 16 compares a threshold level Pt with a differential coefficient obtained by the device 15. A rotation control mechanism 17 receives the signal from the comparator 16 and gathers the transmission data at a predetermined angle pitch DELTAdelta(DELTAdelta

10. 发明专利

JPH01230345A CT SCANNER 失效
公开(公告)号：JPH01230345A
公开(公告)日：1989-09-13
申请号：JP5351888
申请日：1988-03-09
申请人： HITACHI LTD
发明人： KANAMORI TAKAHIRO , KAMATA SHOJI , ITO SHINICHI
IPC分类号： G01N23/04 , A61B6/03
摘要： PURPOSE:To make effective use of permeation data for the period of acceleration and deceleration of a motor as well as to make it possible to collect data corresponding to the position accurately even when there exists unevenness in rotation of the motor by contriving to synchronize a means detecting the position of a CT scanner with the generation and detection of radio active rays at the position. CONSTITUTION:The installation of a linear scale 11 onto the mechanical section of a CT scanner 53 enables the position information of a table to be accurately obtained. A row of pulses 12 on the position is outputted every movement of the table of the CT scanner 53. The signal is inputted to a counter 13. Sampling pitch for data collection from outside is re-set by a pre-setter 14. The position pulse 15 is generated when the row of pulses 12 has been transferred from the liner scale 11 upto a value pre-set. The position pulse is made use of as the trigger pulse of both a radio active ray generator 51 and a detector 55. The radio active ray generator 51 generates radio active rays upon receiving the trigger pulse.

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