JP2017198479A - Image display device for inspection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device for inspection with which it is possible to accurately display an image for inspection even when an inspection object is a three-dimensional object.SOLUTION: An inspection device 2 that includes an image display device for inspection comprises: a processing device 41 for acquiring a plurality of image-capture data derived by imaging an inspection object, and selecting image-capture data for inspection that is used for inspection from the plurality of image-capture data; and a data display unit 421 for displaying the image-capture data for inspection. The processing device 41 acquires data derived by imaging an inspection object W while its posture is changed, as the plurality of image-capture data, and selects one from among the plurality of image-capture data in which an inspection object W whose posture is most suitable for inspection appears, as the image-capture data for inspection.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inspection image display apparatus.

  As an apparatus for displaying an inspection object and performing visual inspection, an apparatus described in Patent Document 1 below is known. The apparatus described in the following Patent Document 1 stratifies input image data and reference data so as to be hierarchized for each defect level and to sequentially display the hierarchized image data.

JP-A-9-319871

  In the conventional technique, a planar object called a printed material is an inspection object, and there is no great difficulty in collating it with two-dimensional reference data. However, when the inspection object is a three-dimensional object, it is difficult to acquire image data viewed from the direction desired to be visually observed in the first place, and the conventional apparatus cannot cope with it.

  The present invention has been made in view of such problems, and an object thereof is to provide an inspection image display device capable of accurately displaying an inspection image even if the inspection object is a three-dimensional object. There is to do.

  In order to solve the above problems, an inspection image display device according to the present invention acquires a plurality of imaging data obtained by imaging an inspection object, and selects inspection imaging data used for inspection from the plurality of imaging data. And a data display unit (421) for displaying the imaging data for inspection. The data selection unit acquires, as the plurality of imaging data, data obtained by imaging the inspection object while changing its posture, and the inspection object having the most suitable posture for inspection is selected from the plurality of imaging data. What is reflected is selected as the imaging data for inspection.

  According to the present invention, since the inspection image data that shows the inspection object having the most suitable posture for inspection is selected as the inspection imaging data from among the plurality of imaging data, a plurality of imaging operations can be performed while changing the posture of the inspection object. Even when data is acquired, a posture suitable for inspection can be displayed as imaging data for inspection.

  Reference numerals in parentheses described in “Means for Solving the Problems” and “Claims” indicate a correspondence relationship with “Mode for Carrying Out the Invention” described later, It does not indicate that the invention described in “Means for Solving the Problems” and “Claims” is limited to “Mode for Carrying Out the Invention” described later.

  ADVANTAGE OF THE INVENTION According to this invention, even if a test target object is a solid object, the image display apparatus for a test | inspection which can display the image for a test | inspection exactly can be provided.

FIG. 1 is a diagram illustrating an overall configuration of an inspection apparatus according to the present embodiment. FIG. 2 is a diagram for explaining the flow of data in FIG. FIG. 3 is a diagram for explaining the acquired imaging data. FIG. 4 is a diagram illustrating an example of a measurement object. FIG. 5 is a diagram for explaining an outline of acquired imaging data. FIG. 6 is a diagram for explaining an example of displaying selected inspection image data. FIG. 7 is a diagram for explaining an example of displaying selected inspection image data.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 shows an inspection apparatus 2 according to the present embodiment, which includes an inspection image display apparatus according to the present invention as a part thereof. The inspection apparatus 2 is an apparatus that picks up an image while conveying the inspection object W and determines whether it is a non-defective product or a defective product. The inspection apparatus 2 includes a transport unit 21, 22, an imaging device 23, illumination devices 24 and 24, a positioning table 25, a single-axis rotation operation unit 26, a defective product lane 27, a non-defective product lane 28, and a control device. 30, and transport unit control devices 31 and 32.

  The conveyance unit 21 holds the inspection object W conveyed to the positioning table 25, rotates the inspection object W within the imaging area of the imaging device 23, and places the inspection object W on the uniaxial rotation operation unit 26. The operation of the transport unit 21 is controlled by the transport unit control device 31. The transport unit control device 31 is configured to operate based on instruction data from the control device 30. The conveyance unit 21 rotates the inspection object W so that there is a moment when the top and bottom surfaces of the inspection object W face the imaging device 23. The imaging device 23 can capture an image including the top and bottom surfaces of the inspection object W.

  The uniaxial rotation operation unit 26 is a part that rotates the placed inspection object about one axis. The uniaxial rotation operation unit 26 rotates the inspection object W such that there is a moment when the side surface of the inspection object W faces the imaging device 23 over the entire circumference. The imaging device 23 can capture an image including the side surface of the inspection target W.

  The imaging device 23 is a device that images the inspection object W whose posture is changed by the transport unit 21 and the uniaxial rotation operation unit 26. A pair of illumination devices 24 are arranged so as to illuminate the imaging region of the imaging device 23.

  The conveyance unit 22 grips the inspection object W placed on the uniaxial rotation operation unit 26 and places it on the defective product lane 27 or the non-defective product lane 28. The operation of the transport unit 22 is controlled by the transport unit control device 32. The transport unit control device 32 is configured to operate based on instruction data from the control device 30.

  The control device 30 is a device that controls the overall behavior of the inspection device 2. The control device 30 outputs operation instruction information to the transport unit 22 according to the inspection result output from the processing device 41. The control device 30 outputs operation instruction information to the transport unit 21 so as to transport the inspection object at a predetermined timing.

  The inspection device 2 further includes processing devices 41, 42, 43, and 4n and a storage device 40. n is an arbitrary integer of 4 or more, and is set according to the processing content. The processing devices 41, 42, 43, 4n and the storage device 40 correspond to the inspection image display device of the present invention.

  The processing device 41 receives imaging data captured by the imaging device 23. The processing device 41 stores the imaging data that has been subjected to the predetermined processing in the storage device 40. The processing devices 42, 43, 4 n execute an inspection or display an inspection image based on the imaging data stored in the storage device 40. The processing device 42 includes a data display unit 421 and an input unit 422, and can receive the display of the inspection image for the inspector and the input of the inspection result from the inspector.

  The inspection results by the processing devices 42, 43, 4n are stored in the storage device 40. The processing device 41 outputs the quality of the inspection object W to the control device 30 based on the inspection result stored in the storage device 40. The control device 30 determines whether to place the inspection object W on the defective product lane 27 or on the non-defective product lane 28 based on the pass / fail inspection result, and outputs it to the transport unit control device 32.

  The processing devices 41, 42, 43, and 4n and the storage device 40 will be further described with reference to FIG. In step S101, the processing device 41 reads the inspection product number / serial number of the inspection object W. The processing device 41 stores the acquired inspection product number / serial number in the storage device 40.

  In step S <b> 102 following step S <b> 101, the processing device 41 waits for input of an image. In step S103 following step S102, the processing device 41 acquires a plurality of imaging data including the top and bottom surfaces of the inspection object W. The processing device 41 selects inspection imaging data used for inspection from a plurality of imaging data. The processing device 41 stores the selected imaging data for inspection in the storage device 40.

  The imaging data and inspection imaging data will be described with reference to FIGS. FIG. 3A shows imaging data including the top surface and the bottom surface of the inspection target W, and is a plurality of imaging data captured at predetermined time intervals from 1 frame to 80 frames. FIG. 3B shows imaging data including the side surface of the inspection object W, which is a plurality of imaging data that are imaged at predetermined time intervals from 1 frame to 100 frames.

  When the inspection object W is accurately positioned with respect to the imaging device 23 and the rotation of the inspection object W is synchronized, for example, the 20th frame and the 70th frame in FIG. ), The 25th, 50th, 75th, and 100th frames are used for inspection. However, in practice, since the inspection object W is rotated at high speed in the direction of the arrow as shown in FIG. 4, for example, the posture shown in FIG. 4 is expected to correspond to the 20th frame in FIG. Even if it exists, it is assumed that it will shift.

  As shown in FIG. 5, the posture shown in FIG. 4 is expected to appear in the 20th frame, but the timing is shifted and the 18th frame is shown. Therefore, in this embodiment, an image corresponding to the posture shown in FIG. 4 is held as reference imaging data, and is identified as imaging data for inspection by collating with a plurality of imaging data. In the example shown in FIG. 5, the imaging data for the 18th frame is regarded as the imaging data for the 20th frame and is used as the imaging data for inspection.

  Returning to FIG. 2, the description will be continued. In step S104 subsequent to step S103, the processing device 41 acquires a plurality of imaging data including the side surface of the inspection object W. In step S105 following step S104, the processing device 41 selects imaging data for inspection used for inspection from a plurality of imaging data. The processing device 41 stores the selected imaging data for inspection in the storage device 40.

  In step S201, the processing device 42 receives the inspection product number / serial number of the inspection object W. In step S202 subsequent to step S201, the processing device 42 enters an image reception standby state for receiving an image including the top and bottom surfaces of the inspection object W using the inspection product number and serial number as keys. When the processing device 41 completes the process of step S103, the processing device 42 displays an inspection image in step S203.

  In step S204 following step S203, the processing device 42 enters an image reception standby state for receiving an image including the side surface of the inspection object W using the inspection product number / serial number as a key. When the processing device 41 completes the process of step S105, the processing device 42 displays an inspection image in step S205.

  An example of an image displayed on the data display unit 421 of the processing device 42 as an inspection image is shown in FIG. The example shown in FIG. 6 is an example in which image display in step S203 and step S205 is performed simultaneously. As shown in FIG. 6, an image 421 a displayed on the data display unit 421 includes an image (A) including the top and bottom surfaces of the inspection object W and an image (B) including the side surface of the inspection object W. Including. As described with reference to FIGS. 3, 4, and 5, “20” indicates “an image having a posture corresponding to the 20th frame”, and the same applies to other frames.

  In step S206 following step S205, the inspector inspects while looking at the image, and inputs the inspection result to the input unit 422. The input inspection result is written in the storage device 40.

  In step S301, the processing device 43 receives the inspection product number / serial number of the inspection object W. In step S302 following step S301, the processing device 42 enters an image reception standby state for receiving an image including the top and bottom surfaces of the inspection object W using the inspection product number and serial number as keys. When the processing device 41 completes the process of step S103, the processing device 43 performs automatic inspection in step S303.

  In step S304 following step S303, the processing device 43 enters an image reception standby state for receiving an image including the side surface of the inspection object W using the inspection product number / serial number as a key. When the processing device 41 completes the process of step S105, the processing device 42 executes automatic inspection in step S305.

  In step S306 following step S305, the automatic inspection result is written in the storage device 40.

  The processing from step S401 to step S406, which is the processing by the processing device 4n, is the same as the processing from step S301 to step S306, which is the processing by the processing device 43, and a description thereof will be omitted.

  In step S106 following step S105, the processing device 41 is in a state of waiting for reception of the inspection result. When the inspection by the processing devices 42, 43, and 4n is completed, the processing device 41 stores an image in step S107 and outputs an inspection result indicating whether the inspection object W is a good product or a defective product to the control device 30. The control device 30 transmits the inspection result of the inspection object W to the transport unit control device 32. The transport unit control device 32 places the inspection object W on the defective product lane 27 or the non-defective product lane 28 based on the inspection result.

  As described above, the inspection apparatus 2 according to the present embodiment includes calibration of the inspection image display apparatus according to the present invention, acquires a plurality of imaging data obtained by imaging the inspection object W, and uses the plurality of imaging data. A processing device 41 that functions as a data selection unit that selects imaging data for inspection used for inspection, and a data display unit 421 that displays imaging data for inspection are provided. The processing device 41 acquires data captured by the inspection object W while changing its posture as a plurality of imaging data as described with reference to FIG. The processing device 41 selects, as inspection imaging data, a plurality of imaging data in which the inspection object W having a posture most suitable for the inspection is reflected.

  In the present embodiment, since the inspection image W in which the inspection object W having the most suitable posture for inspection is captured is selected as the inspection imaging data from among the plurality of imaging data, a plurality of the plurality of imaging data are selected while changing the posture of the inspection object W. Even when imaging data is acquired, a posture suitable for inspection can be displayed as imaging data for inspection.

  In the present embodiment, as described with reference to FIG. 3, the plurality of pieces of imaging data are obtained by imaging the inspection object W at predetermined time intervals, and the processing device 41 functions as a data selection unit. Selects reference imaging data by comparing reference imaging data used as an inspection with a plurality of imaging data. More specifically, an image in which the posture closest to the posture of the inspection object W indicated by the reference imaging data is captured is selected. As described with reference to FIG. 5, even if the timing of imaging the inspection object W deviates from the assumed timing, the deviation is corrected by collating with reference imaging data as shown in FIG. 4. Imaging data obtained by imaging an inspection object W in a suitable posture can be used as imaging data for inspection.

  In the present embodiment, as described with reference to FIG. 6, the data display unit 421 displays a plurality of imaging data for inspection on one inspection object W as an image 421a. By displaying in this way, a visual inspection for one inspection object W can be performed at a time.

  In the present embodiment, as shown in FIG. 7, the data display unit 421 can also arrange inspection image data indicating the same posture in each of the plurality of inspection objects W and display them as an image 421 b. “Wa: 20” indicates “an image of the posture corresponding to the 20th frame in the inspection object Wa”, and the same applies to other frames. By displaying in this way, it can test | inspect, comparing the same site | part of several test target object Wa-Wz, and efficiency improvement of a visual inspection can be achieved.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present invention as long as they have the features of the present invention. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

41: Processing device 421: Data display section

Claims (5)

An image display device for inspection,
A data selection unit (41) for acquiring a plurality of imaging data obtained by imaging the inspection object, and selecting inspection imaging data used for inspection from the plurality of imaging data;
A data display unit (421) for displaying the imaging data for inspection,
The data selection unit
Data obtained by imaging the inspection object while changing its posture is acquired as the plurality of imaging data,
An inspection image display device that selects, as the inspection imaging data, the one in which the inspection object having a posture most suitable for inspection is reflected from the plurality of imaging data. The inspection image display device according to claim 1,
The plurality of imaging data is obtained by imaging the inspection object at a predetermined time interval,
The inspection image display device, wherein the data selection unit selects reference imaging data by comparing reference imaging data serving as a reference used for inspection with the plurality of imaging data. The image display device for inspection according to claim 2,
The plurality of imaging data are images taken at predetermined time intervals while changing the posture of the inspection object,
The inspection image display device, wherein the data selection unit selects an image in which an attitude closest to the attitude of the inspection object indicated by the reference imaging data is captured. The image display device for inspection according to any one of claims 1 to 3,
The said data display part is an image display apparatus for a test | inspection which displays the some said imaging data for a test | inspection in one said test target object. The image display device for inspection according to any one of claims 1 to 3,
The said data display part is an image display apparatus for a test | inspection which displays the said imaging data for a test | inspection which shows the same attitude | position in each of several said test target object side by side.

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