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1. 发明专利

JPH1068716A MANUAL ULTRASONIC FLAW DETECTION SKILL TRAINING DEVICE 失效
公开(公告)号：JPH1068716A
公开(公告)日：1998-03-10
申请号：JP22480296
申请日：1996-08-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOGURE SUMIO , YOSHIDA YOJI , MATSUO TAKASHIRO , HIGUCHI SHINICHI
IPC分类号： G09B9/00 , G01N29/00
摘要： PROBLEM TO BE SOLVED: To evaluate flaw detection skill of a flaw detection technician by detecting flaws of a testpiece having a lot of straight grooves provided in its bottom by ultrasonic waves and automatically compensating and displaying a reference flaw detecting wave height read from a database. SOLUTION: A testpiece 20 has no other material defects except for straight grooves. The material defects are stored in a database as a reference flaw detection waveform data and are distributedly arranged in an area equivalent to a flaw detection face of the testpiece 20 as virtual detects in software. A flaw detection technician reads out position coordinates of a probe 11 as the address of the reference flaw detection waveform data, scans it for a flaw detection while watching the waveform displayed on a display 34, and stores the defect echo height in a data storage processing device 33 based on the flaw detection waveform data. When the reference flaw detection waveform is displayed on the display 34 and the detect echo height is stored, the change component should be compensated so that the echo height from the straight grooves is utilized as its compensation data in this device.

2. 发明专利

JPH09218167A LIQUID PENETRATION DETECTING METHOD AND DEVICE 失效
公开(公告)号：JPH09218167A
公开(公告)日：1997-08-19
申请号：JP2502896
申请日：1996-02-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOGURE SUMIO , FURUKAWA HIDEYASU , SASAKI TSUKASA , HIGUCHI SHINICHI , YOSHIDA YOJI
IPC分类号： G01N21/91 , G01N21/33 , G21C17/003
摘要： PROBLEM TO BE SOLVED: To reasonably drain locally and dry the neighborhood of inspected surface and improve a function for detecting a defect. SOLUTION: An inspection box 2 having a facility necessary for the liquid penetration detection is provided for inspected surface 1 immersed in water, and formed to discharge water at water depth equal to or larger than 10m by use of a jet pump 7 in a condition exposed to the atmosphere. In addition, the box 2 is induction heated by use of a high-frequency induction heating coil 40. As a result, a defect can be heated to such an extent as deep inside at a pre-treatment process. At the same time, after a water washing process, the inside of the box 2 is kept at negative pressure under the application of induction heat with the high-frequency heating coil 40 as well as under the operation of a vacuum pump 22, thereby forcing a residual penetrant in the defect to ooze out. According to this construction, a device can be made small and simplified. At the same time, a function for detecting a defect can be substantially improved.

3. 发明专利

JPH02154110A WATER DEPTH MEASURING DEVICE 失效
公开(公告)号：JPH02154110A
公开(公告)日：1990-06-13
申请号：JP30783288
申请日：1988-12-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA YOJI , HANAWA HARUYUKI
IPC分类号： G01C13/00
摘要： PURPOSE:To hold a sound wave transmitter-receiver at a fixed position from water surface so that it always turns just downward by using a steel rope as the arm of a scanner for moving the sound wave transmitter-receiver on the water surface. CONSTITUTION:The sound wave transmitter-receiver 11 is provided on the tip part of a probe head 10 and transmits sound wave 12. The sound wave 12 is reflected on the bottom of the water 62 and propagated upward under the water, then it is received by the transmitter-receiver 11 again. A distance to the bottom of the water is measured based on a time from transmitting the sound wave till receiving it. A float 20 is used as a supporting body in order to hold the head 10 in a fixed distance from the water surface and easily move it to an optional measurement point on the water surface. Moreover, in order to make the head 10 always turn just downward, it is hung so as to be freely oscillated through an external supporting ring 22 and an internal supporting ring 23. The float 20 is moved while being pushed out of the water surface and returned by the arm of the scanner 30.

4. 发明专利

JPH01153955A ULTRASONIC PROBE 失效
公开(公告)号：JPH01153955A
公开(公告)日：1989-06-16
申请号：JP31199587
申请日：1987-12-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA YOJI , UCHIMURA HIDEYUKI
IPC分类号： G01N29/24 , G01N29/04
摘要： PURPOSE:To obtain high resolution by varying the acoustic impedance in and the ultrasonic wave attenuation rate of a damper with which an ultrasonic wave vibrator is backed. CONSTITUTION:The damper 1 is formed by mixing powdery tungsten with an epoxy filler, stirring them strongly to form air bubbles therein, and depositing the powder 3 on the side of the vibrator 4 by a centrifugal separator, etc., while dispersing the air bubbles to the opposite side from the vibrator. Then when an ultrasonic wave beam 6 is propagated from the vibrator 6 to a body 5 to be inspected, the acoustic impedance is increased by the powder 3 nearby the vibrator 4, so the ultrasonic wave is propagated efficiently and the ultrasonic wave which is propagated into the damper 1 is scattered by the air bubbles 2 to suppress a reflection echo from an end surface. Thus, the high resolution is obtained.

5. 发明专利

JPS6343118A OBSERVING DEVICE FOR RADIANT RAY TRANSMITTING PHOTOGRAPHING FILM 失效
公开(公告)号：JPS6343118A
公开(公告)日：1988-02-24
申请号：JP18673686
申请日：1986-08-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAGUCHI TETSUO , YOSHIDA YOJI
IPC分类号： G02B27/02 , G01N23/04 , G06F3/033 , G06F3/041
摘要： PURPOSE:To automate record formation simultaneously with the observation of a film by converting an output from a transparent pressure sensitive type position signal generating plate fitted to the surface of a film observing light transmitting plate into a recording signal and recording the signal. CONSTITUTION:A radiant ray transmitting image for the inspection of a welding part or the like on a radiant ray transmitting photographing film 5 is observed by light projected from a light source 3 which transmits the light transmitting plate 2 of a radiant ray transmitting photographing film observing device body 1 through the transparent pressure sensitive type position signal generating plate 6. When an area of the generating plate 6 corresponding to a defect or the like is depressed by a point rod or the like, the corresponding output of the plate 6 is converted into a position signal by a signal processor 4 and the signal is recorded in a recording medium, so that record formation can be automatically attained simultaneously with the observation of the film 5.

6. 发明专利

JPS636458A MAGNETIZATION DEVICE FOR MAGNETIC FLAW DETECTION 失效
公开(公告)号：JPS636458A
公开(公告)日：1988-01-12
申请号：JP14954886
申请日：1986-06-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA YOJI , KOGURE SUMIO
IPC分类号： G01N27/83
摘要： PURPOSE:To magnetize the internal surface of a test material that power feeding rods such as a turbine rotor core hole can not be penetrated by bending the power feeding rods in a U shape and rotating them in the hole. CONSTITUTION:A flowing-in side cable 41 and a flowing-out side cable 42 are connected to supply a current to the power feeding rods 11 and 12. A current circuit is formed by providing cables 43 and 44 and connection terminals 45 and 46 so as to adjust the gap between the feeding rods 11 and 12 according to the hole diameter of the test material 2. A magnetization system and measurement sensors 71 and 72 are inserted into the hole by running carriages 81 and 86 and rotated by a rotor 82 driven by an electric motor 83 through gears 84 and 85. When the running carriage 81 is run in the hole axially, the rotor 82 is rotated to measure the leaked magnetic flux at a material defect part by sensors 71 and 72 while magnetizing the inner peripheral surface of the opening part of one hole entirely.

7. 发明专利

JPH07244021A EDDY CURRENT TESTING METHOD 失效
公开(公告)号：JPH07244021A
公开(公告)日：1995-09-19
申请号：JP3809194
申请日：1994-03-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOGURE SUMIO , SUZUKI KAZUHIRO , SHIRAISHI MITSUAKI , YOSHIDA YOJI
IPC分类号： G01N27/90
摘要： PURPOSE:To suppress magnetic noise to a necessary level and to perform an eddy current test by using a material of a core in which the ratio of saturated magnetic flux densities of the magnetic core of electromagnet to a tube is equal to or larger than the ratio of sectional area of the tube to minimum sectional area of the core. CONSTITUTION:A magnetic flux PHIs necessary to magnetically saturate the object heat transfer tube 40 satisfys PHIs = (saturated magnetic flux density Bsc of a magnetic core 20) X (sectional are Sc of the core 20) >= (saturated magnetic flux density Bst of the material of the tube 40) X (sectional area St of the tube 40). In order to increase a value of (BscXSc), the area Sc is restricted, and the tube 40 having large St of the above formula, i,e., large sectional area can be applied by the use of the core material having large Bsc. A function for increasing the thickness of the tube 40 to be applied from t1 to t2 is obtained by the use of the core 20 having (the density Bst of the material of the density Bsc of the core 20) > (the density Bst of the material of the tube 40), and hence the test of the tube 40 which has not been able to be tested, can be executed.

8. 发明专利

JPH07218474A UNDERWATER EDDY CURRENT TESTER 失效
公开(公告)号：JPH07218474A
公开(公告)日：1995-08-18
申请号：JP1450994
申请日：1994-02-08
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KOGURE SUMIO , SUZUKI KAZUHIRO , YAMANAKA TSUNEYASU , YOSHIDA YOJI
IPC分类号： G01N27/90 , G21C17/06
摘要： PURPOSE:To enhance the workability and test accuracy at a time when the measurement of the thickness of the oxide film on the surface of a material to be tested such as a fuel rod and the detection of the surface damage of the material to be tested are performed in the water of a fuel pool by utilizing an eddy current. CONSTITUTION:A chasis 7, a pair of upper and lower frames 5, 6 fixing the chasis 7 to a fuel handle 25 and an operation head 100 moving along the fuel rod 26 of the fuel handle in an up-and-down vertical direction between the frames 5, 6 and also moved in the lateral direction crossing the up-and-down vertical direction at a right angle and a before-and-behind direction are provided and a test coil 10 and a standard coil 13 are attached to the operation head 100 and a sensitivity calibrating test piece 12 is provided in the vicinity of the operation head 100. An air sump is provided to the chasis 7 and feed screws 17, 20 moving the operation head 100 in the up-and-down vertical direction and the lateral direction are provided to the chasis 7 and two motors 16, 19 driven by the screws are arranged to the operation head 100 in a left-and-right symmetric state. A Manganin wire is used in the test coil 10 and guide rollers are provided above and under the test coil 10 to be held by a coil spring 11 and a slide rod.

9. 发明专利

JPH0564771B2 失效
公开(公告)号：JPH0564771B2
公开(公告)日：1993-09-16
申请号：JP18673686
申请日：1986-08-11
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAGUCHI TETSUO , YOSHIDA YOJI
IPC分类号： G02B27/02 , G01N23/04 , G06F3/033 , G06F3/041

10. 发明专利

JPH05107202A FLAW DETECTOR USING MAGNETIC PARTICLE 失效
公开(公告)号：JPH05107202A
公开(公告)日：1993-04-27
申请号：JP27068491
申请日：1991-10-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIDA YOJI , KOGURE SUMIO , KOMAKI KAZUSHI
IPC分类号： G01N21/91 , G01N27/84
摘要： PURPOSE:To automate blow detection using magnetic particles by taking a structure wherein a hole is made in an iron core of a magnetizing apparatus and a TV camera for observation is embedded therein and by providing an ultraviolet-ray intercepting filter and a shutter in front of the camera. CONSTITUTION:A TV camera 200 is fitted in such a manner that it is embedded in a hole made in the central part of an iron core of a magnetizing apparatus 100, and the camera 200 is always directed to the center of a testing surface 502. An illuminating lamp 250 applies an ultraviolet ray so that fluorescent light be generated from fluorescent magnetic particle and makes the camera 200 detect a defect. However, Part of the ultraviolet ray reflected on the testing surface reaches the camera 200 directly and covers a screen, so that other images can not be seen. In order to prevent this disadvantage, an optical filter 231 which transmits the fluorescent light generated by the magnetic particle, but intercepts the ultraviolet ray, is provided in front of the camera 200 and thereby the harmful reflected ultraviolet ray is intercepted. Besides, a shutter 232 for preventing the stick on a lens of the camera 200 of a splash of an inspecting liquid scattered on the testing surface 502 is driven by an actuator 234 to be opened and closed.

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