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1. 发明专利

JPH02218952A METHOD OF DETECTING SPACE PART IN CONCRETE FILLED STEEL PIPE PILLAR 失效
公开(公告)号：JPH02218952A
公开(公告)日：1990-08-31
申请号：JP4065489
申请日：1989-02-21
申请人： TAKENAKA KOMUTEN CO , NIPPON KOKAN KK
发明人： SAITO TOSHIO , IZUMI ITOSHI , SHIGEMOTO YASUNORI , MISAGO TAKASHI , MARUYAMA YOSHIAKI , TAKEHARA KIMIO
IPC分类号： G01N25/72
摘要： PURPOSE:To detect the space part of a pipe in the vicinity of a diaphragm mount part by heating a diaphragm from the outer surface of a pipe body prior to heating the pipe body by a heating mechanism. CONSTITUTION:The diaphragm 4 mounted to a steel pipe pillar 1 filled with concrete 2 for the purpose of reinforcement is heated for a predetermined time from the outer surface of the pipe body 1a of said pillar 1 by an infrared heater 6. This heating is set to a time short enough to prevent that heat is taken up by the diaphragm 4 when a wide range containing the diaphragm 4 for detecting a space part is heated. Subsequently, the steel pipe pillar 1 is equally heated by a heating mechanism 7 so as to generate temp. difference between the respective outer surface parts of the space part 5 in the vicinity of the mount part of the diaphragm 4 and the part where concrete 2 is in contact with the inner surface of the pipe body 1. Since the temperature of the outer surface part of the space part 5 becomes higher due to the heat conductivities of both parts, the heat image of temp. difference having the part showing higher temp. is obtained by an infrared imaging machine 8.

2. 发明专利

JPH02218951A METHOD OF DETECTING FLAW PART IN PIPE 失效
公开(公告)号：JPH02218951A
公开(公告)日：1990-08-31
申请号：JP4065689
申请日：1989-02-21
申请人： NIPPON KOKAN KK , TAKENAKA KOMUTEN CO
发明人： MISAGO TAKASHI , MARUYAMA YOSHIAKI , TAKEHARA KIMIO
IPC分类号： G01N25/72
摘要： PURPOSE:To detect a flaw part under any environment by an infrared imaging machine by a method wherein a mat heater containing a magnetic iron powder is closely brought into contact with the outer surface of the pipe magnetically and said outer surface of the pipe is heated by the heat generated by supplying a current to the electric heater of said mat heater. CONSTITUTION:A pipe 1 is heated from the outer surface thereof to generate temp. difference between the respective parts of the outer surface of the pipe 1 corresponding to the flaw part 2 and normal part in the pipe 1. The heat image of said temp. difference is calculated by an infrared imaging machine 6 to detect the flaw part 2. A mat heater 3 for this heating is composed of a rubber sheet containing a magnetic iron powder and an electric heater 4 is uniformly embedded in said sheet. Therefore, the mat heater 3 is closely brought into contact with the outer surface of the pipe 1 easily by the magnetism of said iron powder and generates heat by connecting a conductor 5 to a power supply. When the outer surface of the pipe 1 is imaged during a time when temp. difference remains, the heat image of temp. difference having the part showing high temp. corresponding to the flaw part 2 is obtained. This image is projected on a monitor television 7 and the flaw part on the inner surface of the pipe 1 is detected.

3. 发明专利

CA1294018C METHOD FOR DETECTING A STATE OF SUBSTANCE EXISTING IN PIPE 未知
公开(公告)号：CA1294018C
公开(公告)日：1992-01-07
申请号：CA574347
申请日：1988-08-10
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , MISAWA ROKUROU , SUGAWA YUZO , TAKEHARA KIMIO
IPC分类号： G01N25/72 , G01N25/00
摘要： METHOD FOR DETECTING A STATE OF SUBSTANCE EXISTING IN PIPE A method for detecting a state of a substance existing in a pipe, the outer surface of which is exposed, which comprises: heating or cooling a pipe, the outer surface of which is exposed, from the side of the outer surface thereof so that a difference in temperature is produced between a portion of the outer surface of the pipe corresponding to a portion of the inner surface thereof, which is in contact with a solid or liquid substance existing in the pipe, and a portion of the outer surface of the pipe corresponding to a portion of the inner surface thereof, which is not in contact with the substance; then shooting the outer surface of the pipe by means of a thermal imaging system while the above-mentioned difference in temperature still remains on the outer surface of the pipe to obtain a thermal image of the difference in temperature; and detecting a state of the substance existing in the pipe by means of the thus obtained thermal image.

4. 发明专利

CA1290421C METHOD AND APPARATUS FOR DETECTING DEFECTIVE PORTION ON INNER SURFACE OF PIPE 未知
公开(公告)号：CA1290421C
公开(公告)日：1991-10-08
申请号：CA574016
申请日：1988-08-05
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , MISAWA ROKUROU , SAGAWA YUZO , TAKEHARA KIMIO , MATOBA YUJI , ISHIHARA KOJI
IPC分类号： G01N25/72
摘要： METHOD AND APPARATUS FOR DETECTING DEFECTIVE PORTION ON INNER SURFACE OF PIPE A method and an apparatus for detecting a defective portion on the inner surface of a pipe, the outer surface of which is exposed, which comprises: heating or cooling a pipe, the outer surface of which is exposed, from the side of the outer surface thereof or the inner surface thereof so that a difference in temperature is produced between a portion of the outer surface of the pipe corresponding to an accumulation of foreign matters or a thinner portion as a defective portion on the inner surface thereof and a portion of the outer surface of the pipe corresponding to a normal portion of the inner surface thereof; then shooting the outer surface of the pipe by means of a thermal imaging system while the above-mentioned difference in temperature still remains on the outer surface of the pipe to obtain a thermal image of the difference in temperature; and detecting the accumulation of foreign matters or the thinner portion as the defective portion on the inner surface of the pipe by means of the thus obtained thermal image.

5. 发明专利

JPS6454240A DETECTION OF FOREIGN MATTER IN INNER SURFACE OF OBJECT TO BE INSPECTED 失效
公开(公告)号：JPS6454240A
公开(公告)日：1989-03-01
申请号：JP20931087
申请日：1987-08-25
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , MISAWA ROKURO , SAGAWA YUZO , TAKEHARA KIMIO
IPC分类号： G01V8/12 , G01N25/18
摘要： PURPOSE:To enable detection of a foreign matter existing on the inner surface of an object to be inspected as infrared image, by heating or cooling the object being inspected from the inner surface thereof to take the outer surface thereof with an infrared camera. CONSTITUTION:An infrared camera head 3 of an infrared video device 2 is directed to the outer surface of a piping 1 as object to be measured from one way. A heating fluid 4 is passed rapidly through the piping 1 to heat it from the inner surface thereof quickly. Then, the quick heating is stopped to take the outer surface of the piping 1 with the camera head 3 immediately after the quick heating or the outer surface thereof is taken with the camera head 3 quickly heating it. Less of heat applied by a heating fluid 4 is transmitted to the outer surface of the pipe at a portion 1b of the pipe wall with a foreign manner 5 on the inner surface thereof than at a portion 1a of the pipe wall without the foreign matter 5 thereon and the existence of the foreign matter 5 on the inner surface thereof appears as temperature difference. This enables projection of the foreign matter 5 in the inner surface of the piping 1 on a monitor TV 6 or the like provided on the body of the infrared video device 2 as infrared image by photographing the outer surface of the piping 1 with the infrared camera head 3 immediately after the quick heating.

6. 发明专利

JPH02218950A METHOD OF DETECTING FLAW PART IN PIPE 失效
公开(公告)号：JPH02218950A
公开(公告)日：1990-08-31
申请号：JP4065589
申请日：1989-02-21
申请人： NIPPON KOKAN KK
发明人： MISAGO TAKASHI , MARUYAMA YOSHIAKI , TAKEHARA KIMIO , KOSHIHARA TOSHIO
IPC分类号： G01N25/72
摘要： PURPOSE:To certainly detect the flaw part in a pipe by closely bringing an air permeable bag-shaped mat having an exothermic mixture received therein into contact with the outer surface of the pipe and heating the pipe by the heat of the oxidation reaction of the iron powder in the mat. CONSTITUTION:A pipe 1 is heated from the outer surface thereof to generate temp. difference between the respective outer surface parts of the pipe 1 corresponding to the flaw part and normal part in said pipe 1. The heat image of the temp. difference is calculated by an infrared imaging machine 4 to detect the flaw part. For the sake of this heating, a bag-shaped mat 3 having an exothermic mixture consisting of an iron powder, an activated carbon powder and a catalyst received therein is closely brought into contact with the outer surface of the pipe 1. When the mat 3 is crumpled after a small amount of water and sufficient air are contained in the exothermic mixture, the mat 3 generates heat by the oxidation reaction of the iron powder. Therefore, the outer surface of the pipe 1 can uniformly be heated in any environment and the flaw part 2 in the pipe 1 can certainly be detected by the imaging machine 4.

7. 发明专利

JPS6454241A DETECTION OF EXISTING STATE OF CONTACT PIECE IN INTERNAL SURFACE OF OBJECT TO BE INSPECTED 失效
公开(公告)号：JPS6454241A
公开(公告)日：1989-03-01
申请号：JP20931187
申请日：1987-08-25
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , MISAWA ROKURO , SAGAWA YUZO , TAKEHARA KIMIO
IPC分类号： G01N25/18 , G01V8/12
摘要： PURPOSE:To enable detection of an infrared image of a state of existence of a contact piece existing in contact with the internal surface of an object to be inspected, by heating or cooling the object being inspected quickly from the outer surface thereof to take the object with an infrared camera. CONSTITUTION:An infrared camera head 4 of an infrared video device 3 is directed to the outer surface of a packed pipe column 1 as piping to be inspected from one way. Then, the outer surface of the packed pipe column 1 held in a screen of a monitor TV 6 is heated quickly with a heater 7 in a photography range thereof and in the perimeter of the range. Then, immediately after the quick heating, it is taken with the camera head 4 in the photography range heated. As the outer surface of a pipe is deprived of heat from the inner surface side thereof at a portion 1b of the pipe wall with a cavity 8 near the inner surface thereof in contact with a concrete 2 less than at the portion 1a thereof without the cavity 8. A difference in thermal effect appears as temperature difference in the outer surface of the pipe depending on a difference of a packing state - how the concrete 2 contacts the inner surface of the packed pipe column 1. Thus, photographing with the infrared camera head 4 enables projection of the packing state on a monitor TV 6 or the like as infrared image.

8. 发明专利

JPS6454239A DETECTION OF FOREIGN MATTER IN INNER SURFACE OF OBJECT TO BE INSPECTED 失效
公开(公告)号：JPS6454239A
公开(公告)日：1989-03-01
申请号：JP20930987
申请日：1987-08-25
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , MISAWA ROKURO , SAGAWA YUZO , TAKEHARA KIMIO
IPC分类号： G01N25/18 , G01V8/12
摘要： PURPOSE:To enable detection of a foreign matter existing in contact with the inner surface of an object to be inspected as infrared image, by a method wherein the object being inspected is heated from the outer surface thereof, heating is stopped to deprive the object being inspected of heat with the fluidization of a fluid on the inner surface side thereof to be taken with an infrared camera on the outer surface thereof. CONSTITUTION:While an infrared camera head 3 of an infrared video device 2 is directed to the outer surface of a piping 1 as object to be inspected from one way, the piping 1 is heated almost evenly with a heater 7 in a range 6 of photographing the outer surface of the piping 1 held in a screen of a monitor TV and in the perimeter thereof. Then, the heating is stopped to take the outer surface of the piping 1 with the camera head 3 in the photographing range 6 heated. here, an internal fluid 9 flows through the piping 1 to deprive the piping 1 of heat from the inner surface side thereof. The piping 1 is deprived of heat by the fluid 9a passed from the inner surface side thereof at a portion 1b of the pipe wall with a foreign matter 8 in the inner surface less than at a portion 1a of the pipe wall without the foreign matter 8 thereon and appears as temperature difference on the outer surface of the pipe. This enables detection of the foreign matter 8 on the inner surface of the piping 1 as infrared image by photographing the outer surface of the piping 1 with the infrared camera head 3 immediately after the passage of the fluid.

9. 发明专利

JPH01295148A DETECTION OF CRACK OF OBJECT SURFACE 失效
公开(公告)号：JPH01295148A
公开(公告)日：1989-11-28
申请号：JP12428988
申请日：1988-05-20
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , TAKEHARA KIMIO
IPC分类号： G01N25/72
摘要： PURPOSE:To easily detect cracks in a short period of time even if the cracks are very small by wetting the surface of an object with a volatile liquid, photographing the surface with an IR camera and discriminating a normal point and the crack point by the difference of the temps. CONSTITUTION:The surface of the object 1 consisting of concrete, etc., is wetted with the volatile liquid 3 which has high volatility, sustains the volatility and is easily penetratable into the cracks 2 generated in the object even if the cracks are very small, by means of a sprayer 5. The surface of the object 1 is thereafter photographed with the IR camera 4 and the image thereof is projected on a monitor TV 7. The normal point of the object 1 dries but the volatile liquid 3 is hardly dried in the point of the cracks 2 and is held wet and, therefore, the temp. drop continues and the cracks 2 are detected as the low temp. part on the IR image on the object 1 surfaces. The cracks 2 are thereby easily detected in a short period of time even if the cracks are very small.

10. 发明专利

JPH01295142A DETECTION OF CRACK OF REFRACTORY OBJECT SURFACE 失效
公开(公告)号：JPH01295142A
公开(公告)日：1989-11-28
申请号：JP12428888
申请日：1988-05-20
申请人： NIPPON KOKAN KK
发明人： KOSHIHARA TOSHIO , TAKEHARA KIMIO
IPC分类号： G01N21/88 , G01N21/91
摘要： PURPOSE:To easily and rapidly detect cracks by wetting the surface of a refractory object with a volatile liquid, then visually observing the surface of the refractory object. CONSTITUTION:Evaporation of the volatile liquid 3 ends at the point of the normal part of the refractory object 1 having no cracks 2 and this point dries to restore the original color upon lapse of certain time after the surface of the refractory object is wetted with the volatile liquid 3. The volatile liquid 3 penetrated into the point of the cracks 2 hardly evaporates and therefore, this point is still wet. The cracks 2 on the surface of the refractory object 1 are detected as the part of the color changed by the wetting itself after the point of the time when the point of the normal part on the surface of the refractory object 1 dries when the surface of the refractory object 1 is visually observed after said surface is wetted with the volatile liquid 3.

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