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1. 发明专利

JPS5631639A ELECTROMAGNETIC ULTRASONIC WAVE FLAW DETECTOR 失效
公开(公告)号：JPS5631639A
公开(公告)日：1981-03-31
申请号：JP10719279
申请日：1979-08-24
申请人： NIPPON STEEL CORP , HITACHI LTD
发明人： KADOWAKI TAKASHI , SASAKI YUKINDO , KAWAMURA SHIYOUJI , SATOU SHIYUUICHI , MATSUNAMI AKIRA , ITOU SUSUMU , FUJIMOTO MINORU , KUBOTA JIYUN
IPC分类号： G01N29/04
摘要： PURPOSE:To increase the accuracy of flow detection, by constitution that the air gap between inspected material and the transmission and reception coils and DC electromagnet iron core can uniformly be held irrespectively of the change in unevenness of the surface of inspected material. CONSTITUTION:The drive controlling circuit for up and down movement of the magnetic pole 12 is composed of the reference air gap setter 18, the 1st and 2nd differential amplifiers 19, 20 differentially operating with the output of air gap setter and the output signal of the air gap instruments 13, 17, and the automatic pulse phase shifter 21 operated with the differential amplifier output signal. First, if the surface of the inspected object 1 is flat, the attracting force of the floating electromagnet to the floating frame 16 is balanced with the self weight of the magnetic pole 12 and the floating electromagnet, and the air gaps G1, G2 hold the reference air gap. Next, if the surface of the inspected object 1 curves downward, since the exciting current of floating electromagnet is reduced corresponding to the amount of curve, the transmission and reception coil 7 moves downward with the magnetic pole 12 and the air gap G1 is kept constant. Further, the gap is uniformly held if the inspected object 1 curves upward, and the accuracy of flow detection can be increased.

2. 发明专利

JPS5631636A ULTRASONIC WAVE FLOW DETECTOR OF ELECTROMAGNETIC TYPE 失效
公开(公告)号：JPS5631636A
公开(公告)日：1981-03-31
申请号：JP10718979
申请日：1979-08-24
申请人： NIPPON STEEL CORP , HITACHI LTD
发明人： FUJIMOTO MINORU , MIYAGAWA KAZUO , SASAKI YUKINDO , MATSUNAMI AKIRA , SATOU SHIYUUICHI , ITOU SUSUMU , KADOWAKI TAKASHI , SATOU ICHIYA
IPC分类号： G01N29/04
摘要： PURPOSE:To make easy the replacement of detection coil, by inserting the magnetic pole iron core freely removable to the magnetic poles opposed to channel-shape iron core and fitting the detection coil to the tip opposed to both the magnetic pole iron cores. CONSTITUTION:The DC coils 1A, 1B are wound on the channel-shape iron core 3, and the detection coils 2A, 2B are fitted with the inserted magnetic pole iron cores 5A, 5B. A part of the external circumference of the cores 5A, 5B is provided with the screw, and the screw is meshed with the iron core 3 for fixation. The detection coils 2A, 2B are fitted to the tip of the iron cores 5A, 5B and the lead 6 of the detection coil passes through the through-hole provided inside. Thus, when the detection coil is fitted to the inserted iron core, the replacement of the detection coil can easily be made. Further, the air gap with the inspected material 4 can easily be adjusted by adjusting the screw.

3. 发明专利

JPS5631638A ELECTROMAGNETIC ULTRASONIC WAVE FLAW DETECTOR 失效
公开(公告)号：JPS5631638A
公开(公告)日：1981-03-31
申请号：JP10719179
申请日：1979-08-24
申请人： NIPPON STEEL CORP , HITACHI LTD
发明人： FUJIMOTO MINORU , MIYAGAWA KAZUO , KAWAMURA SHIYOUJI , MATSUNAMI AKIRA , SATOU SHIYUUICHI , ITOU SUSUMU , SASAKI SOUJI , ARAGAKI SADAKAZU
IPC分类号： G01N29/04
摘要： PURPOSE:To give the specified magnetic flux to steel plate with a small coil, by reducing magnetic resistance by avoiding the air gap between up and lower DC coil iron cores. CONSTITUTION:One end of the iron core 4 is inserted to the magnetic flux guide tube 6 with a clearance C. Although the iron core 4 moves up and down in response to the thickness when the thickness of steel plate is changed, the length of the guide tube 6 is determined so that the iron core 4 is inserted to the magnetic flux guide tube 6 even with the iron core 4 at uppermost position. Since the iron cores 4 and 5 are coupled with the magnetic guide tube 6 like this, no consumption of magnetomotive force due to air gap is made. Accordingly, the specified magnetic flux can be made with a small coil. Further, the iron core 4 and the magnetic flux guide tube 6 have air gap in clearance C, but the value in C is 0.05mm. or less, then can be negligible.

4. 发明专利

JPH09160796A METHOD FOR DETECTING ABNORMAL HEAT GENERATION OF ELECTRONIC COMPUTER 失效
公开(公告)号：JPH09160796A
公开(公告)日：1997-06-20
申请号：JP31508195
申请日：1995-12-04
申请人： HITACHI LTD
发明人： FUJIMOTO MINORU
IPC分类号： G06F1/20 , G06F1/04 , G06F11/22 , G06F11/30
摘要： PROBLEM TO BE SOLVED: To detect abnormal heat generation without adding any special hardware, and reduce the cost and size by performing the operation at every constant interval of time and detecting whether or not an electronic computer is normal or generating abnormal heat according to whether or not the operation result is correct. SOLUTION: This method consists of an input device, a central processing unit(CPU), an output device, and a storage device. For the CPU, an arithmetic logic unit(ALU) 301 which performs given logical operation and a group of general registers 302 which store data, are prepared. For example, operation such as floating-point operation is performed and the actual operation result is compared with a correct operation result calculated at the time of program generation to judge that the computer is normal when they match with each other or that normal calculation can not be done owing to abnormal heat generation when do not. Operation like this is performed at every certain interval of time and if abnormal heat generation is judged, a process for lowering the operating frequency is performed so as to cool the electronic computer.

5. 发明专利

JPH04351278A MARKING DEVICE AND MARKING METHOD 失效
公开(公告)号：JPH04351278A
公开(公告)日：1992-12-07
申请号：JP12025291
申请日：1991-05-24
申请人： HITACHI LTD
发明人： KUWABARA KOJI , FUJIMOTO MINORU , MATSUZAKI HIDEO , KAWAKUBO YUKIO , YANO MAKOTO , TAKEHISA KIWAMU
IPC分类号： B23K26/00 , B23K26/18 , G03F7/20
摘要： PURPOSE:To provide a marking device which can surely execute marking. CONSTITUTION:A laser beam 9 from a UV region laser 8 is swept on a resist 19 by using scanning mirrors 11, 12, by which the marking is executed. Fluorescence 15 at the time of the marking is detected by a detector 16 and the UV region laser 8 is controlled to surely execute the marking. Alphanumerics, etc., 23 marked as latent images are visualized by developing and etching stages which are post stages. The indistinct marking occurring in the generation of the dust arising from the marking and the adverse influence on circuit patterns, etc., can be previously prevented and, therefore, the distinct marking is surely executed.

6. 发明专利

JPH04200886A LASER MARKING DEVICE 失效
公开(公告)号：JPH04200886A
公开(公告)日：1992-07-21
申请号：JP33218890
申请日：1990-11-29
申请人： HITACHI LTD
发明人： OKAWA HIROO , FUJIMOTO MINORU , OKUMURA KIYOSHI , NAKAZAWA AKIO , YANO MAKOTO
IPC分类号： B23K26/06 , B23K26/00 , B23K26/073 , H01S3/00 , H01S3/091 , H01S3/136
摘要： PURPOSE:To easily adjust a laser beam marking device by mounting an image rotator on the laser beam axis in the optical system of a laser beam transmitter to uniformize the intensity distribution of the laser beam. CONSTITUTION:The size of the laser beam is shaped into a size nearly the same as a mask where the laser beam is transmitted through only a mark part such as a letter, etc. The shaped laser beam is passed through the mask to obtain the same shape as the mark. The surface of an object work is irradiated with the laser beam of the same shape to carve the mark. In a laser marking device to execute this operation, an image rotator 7 is mounted on the laser beam axis 4 in the optical system of the inner or outer part of the laser beam oscillator generating the laser beam to uniformize the intensity distribution of the laser beam. In this way, a high utility can be obtained without giving a special constraint to the arrangement of a light condenser.

7. 发明专利

JPH0433792A OPTICAL DEVICE FOR LASER BEAM MARKING 失效
公开(公告)号：JPH0433792A
公开(公告)日：1992-02-05
申请号：JP13822590
申请日：1990-05-30
申请人： HITACHI LTD
发明人： ISHIGURO KOJI , OKUMURA KIYOSHI , FUJIMOTO MINORU
IPC分类号： G03F7/20 , B23K26/066 , H01S3/101
摘要： PURPOSE:To prevent reflected laser beam at a mask from damaging a laser beam oscillator by arranging the mask with a collimating optical system easy of optical design so that an angle made by the incident direction of the laser beam and the tangential direction to the reflecting surface of the mask is not 90 deg.. CONSTITUTION:In a laser marking optical system, a laser beam source 10 guided by optical fibers irradiates a mask 21 through a beam shaping means. The beam 212 transmitting the mask 21 passes through an imaging lens 22 and a pattern on the mask is printed on the material 30 to be worked in the shape of a beam 213. At this time, since the mask 21 is inclined, the reflected beam does not form an image on the surfaces and on the neighborhoods of a gimbals 41 and the laser beam source 10 and does not do damage to them.

8. 发明专利

JPH02187287A LASER BEAM MARKER 失效
公开(公告)号：JPH02187287A
公开(公告)日：1990-07-23
申请号：JP270189
申请日：1989-01-11
申请人： HITACHI LTD
发明人： YOSHIOKA YOSHIO , KUWABARA KOJI , YANO MAKOTO , SAITO KIYOSHI , IWAKI KIYOE , FUJIMOTO MINORU , NEMOTO KENICHI , OKAWA HIROO
IPC分类号： G02F1/13 , B23K26/00 , B41J29/38
摘要： PURPOSE:To apply marking on the wholly wide area by marking while shifting the marking position to one direction at each laser beam irradiation on the same surface of a material to be printed. CONSTITUTION:A laser beam marking system control unit 1 executes timing control for laser beam irradiation of a pulse laser beam generator 2, control for display contents of a liquid crystal cell 4 with signal transmission to liquid crystal driving circuit 3 and control for driving system 5 of conveying table 13 for shifting the materials 10, 11, 12 to be printed. When polarized laser beam 6 emitted with the pulse laser beam generator 2 passes through the liquid crystal cell 4, only the displaying dot part A passes through a beam splitter 8, and the displaying contents A are printed on the surface of the material 11 to be printed with an image formation optical system 9. On the liquid crystal cell 4, B, A and G are displayed in order and at each time, the material 10 to be printed is shifted to the fixed distance and by emitting the laser beam 6, B, A and G are printed. The marking in the wide area can be executed without increasing the laser beam output, etc.

9. 发明专利

JPH01289585A METHOD AND DEVICE FOR LASER MARKING AND TAPE FOR LASER MARKING 失效
公开(公告)号：JPH01289585A
公开(公告)日：1989-11-21
申请号：JP11818388
申请日：1988-05-17
申请人： HITACHI LTD
发明人： YANO MAKOTO , IWAKI KIYOE , FUJIMOTO MINORU , KUWABARA KOJI
IPC分类号： B41M5/26 , B23K26/00 , B23K26/18
摘要： PURPOSE:To enable a multicolor marking eliminating fore and after stage by closely fitting the tape painted, adhered or impregnated with a pigment onto the face to be worked of a base body and irradiating a laser light thereon. CONSTITUTION:The tape 1 painted, adhered or impregnated with a pigment is closely fitted to the body 2 to be worked and a laser light 3 irradiates the tape 1. The pigment heated by the laser light is melted and heat-transferred on the surface of the body to be worked. The marking by the pigment is formed on the surface of the body to be worked by removing the tape from the surface of the body to be worked mechanically. By the method of the irradiation of the laser light being by a scanning method, the laser light 3 is scanned by two mirrors 4, 5 and the laser light is converged by a lens 6 on the tape 1 closely fitted onto the body face to be worked. In this method the marking in an optional shape is enabled on each body to be worked. The multicolor marking eliminating fore and aft stage is thus available and a clear marking can be executed for the body to be worked of various materials by the laser light of one wavelength.

10. 发明专利

JPH0149899B2 失效
公开(公告)号：JPH0149899B2
公开(公告)日：1989-10-26
申请号：JP2848981
申请日：1981-03-02
申请人： HITACHI LTD
发明人： FUJIMOTO MINORU , KADOWAKI TAKASHI
IPC分类号： G01N27/90 , G01N29/04 , G01N29/24

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