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11. 发明专利

JPH05164744A MAGNETIC PARTICLE TESTING METHOD 失效
公开(公告)号：JPH05164744A
公开(公告)日：1993-06-29
申请号：JP32784791
申请日：1991-12-11
申请人： TOYOTA MOTOR CORP
发明人： MORINAGA YASUHIKO , FUKUI TAKAHIRO
IPC分类号： G01N27/84
摘要： PURPOSE:To accurately discriminate the presence/absence of a defect in the level-difference section, edge section, valley section, etc., of components having complicated shapes by magnetizing an object to be measured and sprinkling fine magnetic particles over the object so that the magnetic particles can adhere to a crack or flaw, and then, detecting the crack or flaw with a measuring section by changing the intensity of magnetization. CONSTITUTION:The magnetization of a work 1 is performed by composite magnetization by utilizing an axial current flow from a coil 4 and brush 5. At the time of measuring a valley section, the work 1 is weakly magnetized by making a weak current to flow through the work 1. Then magnetic particles are sprinkled over the magnetized work 1 from a magnetic particle spray 6 while the work 1 is rotated by means of a driving source. By detecting the rotation angle of the work with a rotation angle sensor 7, a strobe 8 is turned on at a preset rotation angle and the picture of the adhering state of the magnetic particles to the work 1 is taken with a TV camera 9. The taken picture is processed and decided by means of a picture processor 10. Then the intensity of magnetization is increased and the picture of the ridge section of a spline section 2 is taken, processed, and decided. Since the magnetic flux density at the valley section is increased in excess of a required level, a masking process is performed during the course of picture processing for cutting off a section increased in magnetic flux density.

12. 发明专利

JPH10221044A METHOD AND APPARATUS FOR INSPECTING SURFACE DEFECT 失效
公开(公告)号：JPH10221044A
公开(公告)日：1998-08-21
申请号：JP2237797
申请日：1997-02-05
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO
IPC分类号： G01B11/30 , G01N21/88
摘要： PROBLEM TO BE SOLVED: To perform inspection with stable accuracy in an inspection apparatus for scanning laser spot light onto a surface to be inspected and detecting a defect on the surface from a reflected image of the laser spot light. SOLUTION: Laser light 12 is reflected by a rotating main scanning mirror 18 to form a conical scanning surface 26, and an annular slit image 54 is formed on a surface 52 to be inspected. A laser optical system 40 for forming the conical scanning surface 26 is moved along an axial direction of the conical scanning surface 26 by an optical system driving mechanism 48, and a diameter of the annular slit image 54 is changed for inspecting a defect on an annular of a predetermined width. A position of a lens 14 according to a light path length accordingly varying to make constant a diameter of laser spot light on the surface 52 to be inspected.

13. 发明专利

JPH05203584A DEVICE FOR DETECTING CHARACTERISTIC AMOUNT ON WORK SURFACE 失效
公开(公告)号：JPH05203584A
公开(公告)日：1993-08-10
申请号：JP15204892
申请日：1992-06-11
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO , MORINAGA YASUHIKO , SARADANI ISAO
IPC分类号： G01B11/30 , G01N21/88 , G01N21/93 , G06T1/00 , H04N7/18
摘要： PURPOSE:To obtain an automatic detection device which can automatically detect a characteristic mount on the surface of a work such as surface defect and surface roughness without giving trouble to a person by creating a mask image which matches the shape of an inspection part without being affected by scattering of dimensions due to positioning accuracy or machining tolerance of the work. CONSTITUTION:An inspection part image is created by performing digitization processing of an image which is input by an ITV camera 4 and a cross point between a boundary line and an inspection part image contour is extracted by adding it to the boundary line image for creating mask. A mask point is created from the position relationship and work reference dimensions from the cross points and a mask image interlocking the mask points is created. By performing masking of the image which was subjected to digitization processing using the mask image, a characteristic amount on the surface of the work such as surface defect and surface roughness can be detected.

14. 发明专利

JPH0337564A AUTOMATIC MAGNETIC-PARTICLE EXAMINATION APPARATUS 失效
公开(公告)号：JPH0337564A
公开(公告)日：1991-02-18
申请号：JP17147489
申请日：1989-07-03
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO
IPC分类号： G01N27/84
摘要： PURPOSE:To make the automatic judgment of a defect accurate by obtaining the maximum luminance of the no-defect part in an object to be inspected within the luminance distribution of the data of images whose profiles are intensified, and using the luminance as a threshold value for binary coding. CONSTITUTION:The image of an object to be inspected W to which magnetic powder liquid is attached is picked up with an image sensing means C such as a TV camera. The results are digitized into the luminance data for every picture element. Thereafter, the data undergo profile intensifying step with a profile intensifying means M1. Then, the picture element data in a region which is known as a no-defect part within the processed picture elements are sent into a no-defect maximum-luminance detecting means M2. Thus the maximum luminance in the data is detected. The maximum luminance of the luminance distribution of the no-defect part is approximately close to the minimum value of the luminance of the defective part. Therefore, most of the data of the picture elements corresponding to the defective part can be taken out when the vicinity of the maximum luminance with is detected with the means M2 is used as a threshold value. Thus the automatic judgment of the defect can be made accurate.

15. 发明专利

JPH0283445A AUTOMATIC FLAW DETECTION APPARATUS 失效
公开(公告)号：JPH0283445A
公开(公告)日：1990-03-23
申请号：JP23571688
申请日：1988-09-20
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO , FUJIMORI KAZUO
IPC分类号： G01N21/84 , G01N27/84
摘要： PURPOSE:To continuously use a stroboscopic lamp subjected to secular deterioration by relaxing the light passage restriction of an iris for restricting the quantity of the incident light to a camera when the peak of light emitting intensity becomes low or when a light emitting time for obtaining predetermined irradiation quantity becomes long. CONSTITUTION:An integration circuit 26 performs the time integration of the intensity of ultraviolet rays incident to photoelectric transducers 20, 21 from the point of time when said circuit 26 receives the light emission start signal (b) from a discharge control circuit 18 to output the integral value SIGMA to a comparing circuit 28. A peak value detection circuit 32 detects the peak value P of ultraviolet rays incident to the photoelectric transducers 20, 21 to input the same to the comparing circuit 28. The peak value P is compared with the reference value PO from a reference data generating circuit 30 and, at the time of P TO, the iris altering signal (e) is similarly outputted. At the time of the reception of the iris altering signal (e), the iris 19 provided to the lens of a TV camera 14 is opened by predetermined quantity before the lighting of the lamps 12, 13 of the next time is started.

16. 发明专利

JPH04297961A MAGNETIC PARTICLE INSPECTION DATA PROCESSING DEVICE 失效
公开(公告)号：JPH04297961A
公开(公告)日：1992-10-21
申请号：JP6309291
申请日：1991-03-27
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO
IPC分类号： G06F15/18 , G06N3/00 , G06N99/00 , G06T1/00
摘要： PURPOSE:To obtain a magnetic particle inspection data processing device which can determine a threshold without being affected by disturbance even in the case of an indistinct dip in picture data. CONSTITUTION:This device consists of a means 101 which picks up the image of an inspection object material to output the picture signal, a means 102 for contour processing of the picture signal, a means 103 which counts the number of picture elements of picture data in each of plural divided luminances, a means 104 which inputs numbers of picture elements corresponding to respective luminances of the luminance distribution to the same number of artificial neural elements as the number of luminance divisions constituting an input layer and calculates the threshold for binarization from one of plural artificial neural elements constituting an output layer after the arithmetic processing in at least one intermediate layer, a means 105 which teaches coupling weights between the input layer and intermediate layers, between intermediate layers, and between intermediate layers and the output layer, a means 106 which binarizes the processing result of the contour processing by the threshold for binarization, and a display means 107 on which the processing result is displayed.

17. 发明专利

JPH04258757A MAGNETIC PARTICLE FLAW DETECTOR 失效
公开(公告)号：JPH04258757A
公开(公告)日：1992-09-14
申请号：JP4101891
申请日：1991-02-12
申请人： TOYOTA MOTOR CORP
发明人： TAKEUCHI HIROYUKI , FUKUI TAKAHIRO
IPC分类号： G01N27/84
摘要： PURPOSE:To establish the reliability of a surface flaw inspection by preventing the coagulation of magnetic particles on the surface of a work. CONSTITUTION:A work W magnetized and sprayed with a magnetic particle liquid at the rotating state in a magnetization/magnetic particle liquid spray section 2 is conveyed to an inspection section 3 by a work conveyor 35, the surface flaw of the work W is detected by the inspection section 3 of a magnetic particle flaw detector while the work W is rotated, a clamp unit 39 removably pinching the work W is provided on the work conveyor 35, the clamp unit 39 is constituted of a fixed arm 42 with a drive roller 45 rotated by a motor 47, a moving arm 44 with a free roller 46, and a cylinder 49 swaying the moving arm 44, and the work W is pinched by both rollers 45, 46 and rotated during conveyance.

18. 发明专利

JPH03218447A PICTURE DATA CONVERTING METHOD 失效
公开(公告)号：JPH03218447A
公开(公告)日：1991-09-26
申请号：JP1419490
申请日：1990-01-23
申请人： TOYOTA MOTOR CORP
发明人： FUJIMORI KAZUO , FUKUI TAKAHIRO
IPC分类号： G01N21/88 , G01N21/93 , G06T5/20 , H04N7/18
摘要： PURPOSE:To obtain picture data emphasizing a linear fault part by comparing luminance distribution pattern data in a direction to cross the reference linear fault part with source picture data, calculating the degree of coincidence and defining it as new picture data. CONSTITUTION:The source picture data obtained by picking the image of a work W surface are extracted by a cross filter 21 and the degree of coincident with the pattern data is calculated. Based on this degree of coincidence, the picture data are calculated. Since these pattern data are prepared from the luminance data obtained by picking up the image of the linear reference fault part, when the linear fault such as cruck, etc., is generated on the surface of the work W, the part is brightly projected and displayed on a CRT 13 while emphasizing the linear fault part. From the shape of the cross filter 21, the fault part is emphasized and displayed even when it is formed in any direction such as longitudinal, lateral and oblique directions. Therefore, by such a picture data converter, the linear fault part on the work surface is easily inspected.

19. 发明专利

JPH01210807A AUTOMATIC INSPECTING DEVICE FOR SMOOTHNESS OF PAINT FILM 失效
公开(公告)号：JPH01210807A
公开(公告)日：1989-08-24
申请号：JP3630688
申请日：1988-02-18
申请人： TOYOTA MOTOR CORP
发明人： FUKUI TAKAHIRO , FUJIMORI KAZUO , SAKAKIBARA MASATO
IPC分类号： G01B11/30 , G01N21/57 , G01N21/88 , G01N21/89 , G01N21/93
摘要： PURPOSE:To easily execute a paint film inspection of a product on a manufacturing line by providing a stripe pattern projecting means, an image pickup means, a line fining processing means and an endpoint.intersection arithmetic means. CONSTITUTION:An image of a bright and dark stripe pattern on the surface of an object to be inspected by a stripe pattern projecting means M1 is brought to image pickup as an intensity level signal of light by an image pickup means M2, and a line fining processing means M3 compares this intensity level signal of light with a prescribed reference value. As a result, the bright and dark stripe pattern which has been brought to image pickup becomes a bright and dark stripe pattern of a binary signal, and also, a bright part or a dark part of the bright and dark stripe pattern of the binary signal is brought to line fining to prescribed line width. Thereafter, an endpoint.intersection arithmetic means M4 extracts a trace-cut endpoint and an intersection of the line which has been brought to line fining, the number of endpoints and intersections which have been extracted or its dispersion state is calculated, and from the number of endpoints and intersections or its dispersion state which has been calculated, smoothness of a paint film of the object to be inspected is decided by a smoothness deciding means M5.

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