JP2002039968A - Method for inspecting internal structure of ball and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method having a high measurement accuracy for inspecting an internal structure of balls, and an apparatus therefor. SOLUTION: Horizontal linear soft X-rays are irradiated from a soft X-ray element array 32 to the ball 20 to be inspected. Soft X-rays passing the ball 20 are received with the use of a coloring fluorescent screen 33 generating a color corresponding to a wavelength of the soft X-rays. A type of the generated color and a coloring position at the coloring fluorescent screen 33 are imaged by a CCD camera 34. Moreover, data of the imaged result of the CCD camera 34 are subjected to wavelength spectral analysis by a digital filter 13 and a signal spectroscope 14. Based on the analysis result, a material constitution inside the ball 20 is detected by a central processing part 12. Whether the ball is good or not is decided by comparing an internal constitution of the ball obtained from the detected result with an inspection reference constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting the internal structure of a ball, and more particularly to a method for inspecting the quality of a ball which can accurately determine the position of the core when a golf ball has a core inside. The present invention relates to an internal structure inspection method and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, golf balls have different initial speeds and flight distances due to differences in the internal structure. In particular, golf balls have a core at the center, and if the center of the core is deviated from the center of the entire ball, that is, eccentric, the performance of the golf ball is greatly reduced. It must be made. Initially, when inspecting the internal structure of a ball, it is randomly extracted from a plurality of manufactured balls, and the extracted ball is cut to determine whether or not the internal structure is within a desired standard. I was

[0003] However, cutting the balls as described above wastes many balls for the inspection, thereby increasing the manufacturing cost. Further, the quality of the balls other than the extracted balls is determined based on the results of the inspected balls, so that it is within the average statistical range whether or not the balls are reliably within the desired specifications.

For this reason, a measuring device capable of performing a more accurate inspection has been proposed (JP-A-59-214707). This device includes an irradiating device for irradiating a golf ball with soft X-rays, a soft X-ray television camera for imaging soft X-rays transmitted through the golf ball, and three-color white, gray, and black images. A monitor TV that displays enlarged images using
A thickness reading device for reading the thickness of a predetermined layer inside the ball from the image is provided, and it is determined whether or not the variation of the read thickness is within an allowable value to determine whether or not the thickness is good.

[0005]

However, the above-mentioned soft X-ray television camera outputs a signal proportional to the intensity of the soft X-ray, and a monitor television divides this intensity into three stages to produce white, gray, Since the display is performed using three colors of black, the position of the outer periphery of the core becomes unclear. For this reason,
It was very difficult to increase the measurement accuracy.

An object of the present invention is to provide a method and apparatus for inspecting the internal structure of a ball having high measurement accuracy in view of the above problems.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, there is provided a ball having a core having at least one layer made of a material different from the core. An internal structure inspection method of a ball for inspecting a structure,
The ball is irradiated with soft X-rays, and the soft X-rays transmitted through the ball are received using a coloring fluorescent plate that emits a color corresponding to the wavelength of the soft X-rays. A method of inspecting the internal structure of a ball is proposed, in which a material composition in the ball is detected based on the detection result, and the internal structure of the ball obtained from the detection result is compared with a configuration of an inspection standard to determine a pass / fail.

According to the method for inspecting the internal structure of a ball, when soft X-rays are irradiated on a ball to be inspected, the irradiated soft X-rays pass through the inside of the ball. At this time, the wavelength of the soft X-ray changes depending on the type of the substance existing in the transmission path. The soft X-rays transmitted through the ball are applied to the color fluorescent plate. The coloring fluorescent plate emits a different color for each wavelength of the irradiated soft X-ray. The color development position in the color fluorescent plate can be made to correspond to the internal structure of the ball by the path of the soft X-ray transmitted through the inside of the ball. This makes it possible to detect the material composition inside the ball based on the type of color and the color position. Therefore, the quality can be determined by comparing the internal configuration of the ball obtained from the detection result with the configuration of the inspection standard.

According to a second aspect of the present invention, in the method for inspecting the internal structure of a ball according to the first aspect, the soft X-ray is applied to the ball such that an irradiation position or a locus of the irradiation position overlaps a straight line on the coloring fluorescent plate. We propose a method of inspecting the internal structure of the ball to be irradiated.

According to the method for inspecting the internal structure of a ball, the soft X-ray is irradiated onto the ball such that the irradiation position or the trajectory of the irradiation position overlaps the straight line on the coloring fluorescent plate. For example, it is possible to easily detect the internal structure in a horizontal cross section of the center point and to simplify the measurement process.

According to a third aspect of the present invention, in the method of inspecting the internal structure of a ball according to the second aspect, the soft X-ray is irradiated while irradiating the ball with a spot-shaped soft X-ray having a diameter smaller than the diameter of the ball. We propose a method for inspecting the internal structure of a ball that moves the irradiation position.

According to the method for inspecting the internal structure of a ball, a soft X-ray in the form of a spot is moved while being irradiated on the ball, and the spot diameter is smaller than the diameter of the ball. Inspection of the internal structure of

According to a fourth aspect of the present invention, in the ball internal structure inspection method according to the second aspect, a plurality of spot-shaped soft X-rays having a diameter smaller than the diameter of the ball are formed.
A method for inspecting the internal structure of a ball that irradiates the ball so that the irradiation position is aligned on the straight line is proposed.

According to the method for inspecting the internal structure of a ball, the ball is irradiated with a plurality of spot-like soft X-rays so that the irradiation positions are aligned on a straight line, so that there is no need to move the light source of soft X-rays. .

According to a fifth aspect of the present invention, in the method for inspecting the internal structure of a ball according to any one of the second to fourth aspects, a line perpendicular to the straight line for irradiating the soft X-ray is formed in the plane of the coloring fluorescent plate. Moving the straight line for irradiating the soft X-ray in the direction, detecting the material composition inside the ball at two or more different straight lines, and determining the quality of the ball based on the two or more detection results Suggest inspection method.

According to the ball internal structure inspection method, since the internal structure of the ball can be inspected on two or more different straight lines parallel to each other, the inspection accuracy can be improved.

According to a sixth aspect of the present invention, in the method for inspecting the internal structure of a ball according to any one of the first to fifth aspects, the soft X-ray is irradiated on the ball from two or more different directions. A method of inspecting the internal structure of the ball, which determines the quality based on the detection result at each time, is proposed.

According to the method for inspecting the internal structure of a ball, the quality of the ball is judged based on the detection results obtained when the ball is irradiated with soft X-rays from two or more different directions, thereby improving the inspection accuracy. I do.

According to a seventh aspect of the present invention, in the method for inspecting the internal structure of a ball according to any one of the first to sixth aspects, a spectrum of a color developed by the color fluorescent plate is analyzed to detect a material composition inside the ball. We propose a method for inspecting the internal structure of a ball.

According to the method for inspecting the internal structure of the ball, the color spectrum of the colored fluorescent plate is analyzed to detect the material composition inside the ball, so that the detection error is reduced and the inspection accuracy is improved.

According to an eighth aspect of the present invention, there is provided a ball internal structure inspection apparatus for inspecting the internal structure of a ball having at least one layer made of a substance different from the core around the core. A supporting portion for supporting the target ball, a soft X-ray irradiating portion for irradiating the ball with soft X-rays so as to be aligned with a predetermined plane, and facing the soft X-ray irradiating portion with the ball interposed therebetween Color fluorescent plate that receives soft X-rays transmitted through the ball and emits different colors in accordance with the wavelength of the soft X-ray, a color type of the color fluorescent plate, and a color position on the color fluorescent plate A signal generating means for outputting an electric signal corresponding to the above, and a pass / fail judgment for judging pass / fail by comparing the type of coloring at each of the color forming positions with the type of inspection reference based on the electric signal output from the signal generating means. With means And it has proposed the internal structure inspection apparatus of the ball.

According to the apparatus for inspecting the internal structure of a ball, the ball to be inspected is supported by the support, and the ball is irradiated with soft X-rays so as to be aligned in a predetermined plane. The soft X-rays penetrate the ball and irradiate a color fluorescent plate disposed at a position facing the ball with the ball therebetween. The color fluorescent plate receives soft X-rays transmitted through the ball and emits different colors depending on the wavelength of the soft X-rays. Further, an electric signal corresponding to the type of color of the coloring fluorescent plate and a coloring position on the coloring fluorescent plate is generated by a signal generating unit, and each of the coloring is determined by a pass / fail determination unit based on the electric signal output from the signal generating unit. The type of color development at the position is compared with the type of inspection reference to determine the quality of the ball.

According to a ninth aspect of the present invention, in the ball internal structure inspection apparatus according to the eighth aspect, the soft X-ray irradiator emits a beam-shaped soft X-ray having a spot diameter smaller than the diameter of the ball. The present invention proposes a ball internal structure inspection device including an X-ray element array in which a plurality of radiating X-ray radiation elements are arranged in a straight line.

According to the ball internal structure inspection apparatus, the ball can be irradiated with linear soft X-rays by the X-ray element array in which a plurality of X-ray radiation elements are arranged in a straight line. The internal structure in a specific cross section of the ball, for example, a cross section horizontal to the center point can be easily detected, and the measurement process can be simplified.

According to a tenth aspect of the present invention, in the ball internal structure inspection apparatus according to the eighth or ninth aspect, there are provided the two color-emitting fluorescent plates arranged so that their surfaces are orthogonal to each other. The line irradiating unit has a first irradiating unit and a second irradiating unit corresponding to each of the two coloring fluorescent plates,
The signal generation means proposes an internal structure inspection apparatus for a ball that outputs an electric signal corresponding to a coloring type of each of the two coloring fluorescent plates and a coloring position on the coloring fluorescent plate.

According to the ball internal structure inspection apparatus, 9
The internal structure of each ball can be inspected from directions different by 0 degrees.

According to an eleventh aspect of the present invention, there is provided the ball internal structure inspection apparatus according to the ninth aspect, wherein the X-ray radiating element is an X-ray diode.

According to the apparatus for inspecting the internal structure of the ball, X
Since the X-ray radiation element is made of an X-ray diode, the size of the apparatus can be reduced and the inspection accuracy can be improved.

According to a twelfth aspect of the present invention, in the ball internal structure inspection apparatus according to any one of the eighth to tenth aspects, the pass / fail determination means determines the maximum value or the minimum value of the soft X-ray wavelength change. The present invention proposes a ball internal structure inspection apparatus that determines a pass / fail by comparing a coloration position in at least one of the above with the inspection reference value.

According to the ball internal structure inspection apparatus, the color development position at least one of the maximum value and the minimum value in the wavelength change of the soft X-ray is compared with the inspection reference value to judge pass / fail.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram showing an inspection apparatus according to a first embodiment of the present invention, and FIG. 2 is a side view showing a measurement unit thereof. In the first embodiment, an inspection apparatus for inspecting the internal structure of the golf ball 20, for example, inspecting whether the core 21 in the ball 20 is disposed at the center will be described.

1 and 2, reference numeral 10 denotes an inspection device, which is a measuring unit 11, a central processing unit 12, a digital filter 13, a signal spectroscope 14, a memory 15, a soft X-ray element driving unit 16, and a rotation driving unit 17. , An operation unit 18 and a display unit 19.

The measuring section 11 comprises a rotating mechanism 31 having a support table 31a on the upper surface, a soft X-ray element array 32, a coloring fluorescent plate 33, and a CCD camera 34.

The rotation mechanism 31 mounts and holds the golf ball 20 on the support base 31a, and moves the golf ball on the support base 31a 90 degrees in the horizontal direction based on a control signal from the rotation drive unit 17 described later. Rotate degrees.

As shown in FIG. 3, the soft X-ray element array 32 is composed of a flat support 32b in which a plurality of soft X-ray elements 32a are arranged in a horizontal straight line. The soft X-ray element array 32 is arranged so that the light emitting surface of the soft X-ray element 32a is parallel to the horizontal center axis of the ball 20 placed on the support 31a. As the soft X-ray element, for example, a soft X-ray light emitting diode is used. Also,
The diameter of the soft X-ray element is extremely smaller than the diameter of the ball 20 to be inspected, and emits a beam of soft X-ray having a spot diameter about the diameter of the element.

The color fluorescent plate 33 is disposed so as to be parallel to the light emitting surface of the soft X-ray element array 32 with the support 31a interposed therebetween, and receives the soft X-ray transmitted through the ball 20 on its surface. Different colors are generated depending on the wavelength of the soft X-ray. The color of the color fluorescent plate 33 appears on both front and back surfaces.

The CCD camera 34 is for color imaging and is arranged on the back side of the color fluorescent plate 33,
3, which has a high resolution capable of specifying the color generated and the position of the generated color, is operationally controlled by a control signal from the central processing unit 12, converts a captured image into an electric signal, and outputs the electric signal.

The central processing unit 12 is mainly composed of a well-known CPU, operates based on a preset program, and operates a soft X-ray element (diode) driving unit 16 and a rotation driving unit by operating the operation unit 18. A control signal is output to the memory 17 to control these operations.
Based on the data stored in 5, it is determined whether or not core 21 in ball 20 is located at the center, and the result is displayed on display unit 19.

The digital filter 13 receives the output signal of the CCD camera 34, analyzes the spectrum of the color difference, and outputs it to the signal spectroscope 14.

The signal spectroscope 14 determines the color wavelength of the captured image based on the result of the spectrum analysis,
Is stored in the memory 15 as data corresponding to the coordinates in the horizontal direction (X direction) parallel to the surface of (1).

The soft X-ray element (diode) drive section 16
Based on a control signal from the central processing unit 12, a current is caused to flow through the soft X-ray elements 32a of the soft X-ray element array 32 to generate soft X-rays.

The rotation drive unit 17 drives the rotation mechanism 31 based on a control signal from the central processing unit 12, and
The ball 20 on a is rotated.

The operation section 18 is constituted by a keyboard comprising a plurality of switches, and the display section 19 is constituted by a liquid crystal display and its display control circuit.

Next, the operation of this embodiment having the above-described configuration will be described with reference to FIGS.

FIGS. 4 and 5 are diagrams for explaining the relationship between the internal structure of the ball and the wavelength of the transmitted soft X-ray. FIG. 6 is a flowchart for explaining the inspection processing of the central processing unit 12 in the first embodiment. It is.

The inspector places the ball 20 to be inspected on the support table 31a, and operates the central processing unit 1 via the operation unit 18.
In step 2, an inspection start command is input. Thus, the central processing unit 1
2 starts the inspection process.

The central processing unit 12 that has started the inspection operates the soft X-ray element driving unit 16 to output the soft X-ray element 32a from the soft X-ray element 32a.
A line is generated and the ball 20 is irradiated with linear soft X-rays (SA1). As a result, the soft X
The line passes through the ball 20 and irradiates the coloring fluorescent plate 33,
The coloring fluorescent plate 33 develops a color. At this time, the luminance of the color development differs according to the intensity of the soft X-rays applied to the fluorescent screen 33. Here, as shown in FIG. 4, the core 21 and the outer portion 22 of the ball 20 have different material configurations and different thicknesses of the material, that is, different soft X-ray transmission path distances within the same material. The wavelength of the soft X-ray transmitted through the ball 20 changes due to the difference in the material configuration in the transmission path. The color development on the color-developing fluorescent plate 33 differs depending on the wavelength difference. FIG. 5 is a diagram illustrating a case where the position of the core 21 in the ball 20 is shifted. When the core 21 is misaligned, the color-forming position of the color-forming fluorescent plate 33 changes to a different one in accordance with the positional shift.

Next, the central processing unit 12 takes an image of the color development state on the back surface of the color fluorescent plate 33 with the CCD camera 34 (SA2) and stops the irradiation of soft X-rays (SA3).
The imaging result is output from the CD camera 34 as an electric signal (SA4). As a result, the electric signal of the imaging result of the CCD camera 34 is input to the digital filter 13, and the color difference is spectrally analyzed by the digital filter 13 and output to the signal spectroscope 14. Further, based on the result of the spectrum analysis, the signal spectroscope 14 stores the color wavelength of the captured image in the memory 1 as data in which the color wavelength is associated with the coordinates in the horizontal direction (X direction) parallel to the surface of the coloring fluorescent plate 33.
5 is stored.

Thereafter, the central processing unit 12 reads the data stored in the memory 15, and as shown in FIG. 4, the maximum points P1, P2, and P2 of the wavelength of the soft X-ray that changes along the X-axis direction.
The coordinates of P3 are detected (SA5, SA6, SA7) and P1
Distance L1 between coordinates and P2 coordinates, and P1 coordinates and P3
The distance L2 from the coordinates is calculated (SA8, SA9).
Next, it is determined whether or not these distances L1 and L2 are within the inspection acceptance criteria (SA10, SA11).
Here, in the program of the central processing unit 12, the distances L1 and L2 and the permissible errors of the passed balls are set in advance.

As a result of this determination, the calculated distances L1, L2
If any one of them does not fall within the acceptance criterion, the process proceeds to SA24 described later. When both the calculated distances L1 and L2 are within the acceptance criteria,
The central processing unit 12 controls the rotation mechanism 3 via the rotation drive unit 17.
Is driven to rotate the ball 20 on the support base 31a by 90 degrees in the horizontal direction (SA12). Thereby, the ball 2
The soft X-ray irradiating surface of 0 is a surface different by 90 degrees.

Thereafter, the central processing section 12 operates the soft X-ray element driving section 16 to generate soft X-rays from the soft X-ray element 32a and irradiates the ball 20 with linear soft X-rays (SA1).
3). The color development state of the rear surface of the coloring fluorescent plate 33 is imaged by the CCD camera 34 (SA14), irradiation of soft X-rays is stopped (SA15), and the imaging result is output from the CCD camera 34 as an electric signal (SA16). This allows
In the same manner as described above, the electric signal of the imaging result of the CCD camera 34 is input to the digital filter 13, and the color difference is spectrally analyzed by the digital filter 13 and output to the signal spectroscope 14. Further, based on the result of the spectrum analysis, the signal spectroscope 14 adjusts the color wavelength of the captured image in a direction parallel to the surface of the coloring fluorescent plate 33 and in a horizontal direction (X direction).
Are stored in the memory 15 as data corresponding to the coordinates of

Thereafter, the central processing unit 12 reads the data stored in the memory 15, and detects the coordinates of the local maximum points P1, P2, and P3 of the wavelength of the soft X-ray that changes along the X-axis direction (SA17). , SA18, SA19), P1 coordinates and P2
The distance L1 between the coordinates and the distance L2 between the coordinates P1 and P3 are calculated (SA20, SA21).

Next, it is determined whether or not these distances L1 and L2 are within the acceptance criteria for the inspection (SA22,
SA23). As a result of this determination, the calculated distances L1, L2
If any one of the two does not fall within the acceptance criteria, “inspection failed” is displayed on the display unit 19 (SA2).
4). When both the calculated distances L1 and L2 are within the acceptance criteria, the central processing unit 12 displays the display unit 19
"Inspection passed" is displayed (SA25).

As described above, according to the present embodiment, the soft X
By irradiating a line to the ball 20 to be inspected, the quality of the internal structure of the ball can be determined based on the wavelength of the soft X-ray which changes depending on the type of the substance present in the transmission path, and thus the ball 20 is inspected. The inspection can be performed with high accuracy without breaking the ball 20.

Next, a second embodiment of the present invention will be described.

FIG. 7 is a configuration diagram showing an inspection apparatus 10B according to the second embodiment, and FIG. 8 is a side view showing a measurement unit thereof. In the figure, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted. The difference between the second embodiment and the first embodiment is that, in the second embodiment, in addition to the configuration of the first embodiment, a vertical movement mechanism that moves the soft X-ray element array 32 up and down. 41 and its drive unit 42 are provided. The drive unit 42 drives the vertical movement mechanism 41 based on a control signal from the central processing unit 12.

In the second embodiment, as shown in FIG. 9, the soft X-ray element array 32 is moved up and down (in the Y-axis direction) so that soft X-rays are projected at three different Y coordinates Y1, Y2 and Y3. Then, the distances L1 and L2 are detected at the respective irradiation positions. Here, three Y coordinates Y1,
Since the distances L1 and L2 in Y2 and Y3 are different, the values serving as the acceptance criteria and the permissible errors are set in the program of the central processing unit 12 in advance. This makes it possible to detect the displacement of the core 21 in each of X, Y, and Z of the three-dimensional orthogonal coordinates.

Next, a third embodiment of the present invention will be described.

FIG. 10 shows an inspection apparatus 10C according to the third embodiment.
FIG. 11 is a front view showing the soft X-ray element array 32C. In these figures, the first
The same components as those of the embodiment are denoted by the same reference numerals, and description thereof will be omitted. The difference between the third embodiment and the first embodiment is that, in the third embodiment, the soft X-ray element array 32 and the driving section 16 thereof in the first embodiment are replaced with a soft X-ray element array 32 in a cross shape. That is, a soft X-ray element array 32C in which the line elements 32a are arranged and a driving unit 16C thereof are provided.

That is, the soft X-ray element array 32C comprises a flat support 32b in which a plurality of soft X-ray elements 32a are arranged in a cross shape consisting of a horizontal straight line and a vertical straight line intersecting the center of the straight line. Have been.

When the ball 20 is irradiated with soft X-rays, soft X-rays are generated from all the soft X-ray elements 32a. As a result, a color change appears in a cross shape corresponding to the arrangement of the soft X-ray elements 32a on the color fluorescent plate 33, and the result of the spectrum analysis corresponding to the color state is stored in the memory 15.

The central processing unit 12 detects the coordinates of P1, P2, and P3 from the change in the wavelength along the X-axis as in the first embodiment, and calculates the distances L1 and L2 based on the coordinates. As shown in FIG. 12, the coordinates of Q1, Q2, and Q3 are detected from a change in the wavelength along the Y axis, and distances L3 and L4 are calculated based on the coordinates. Further, the ball 20 is rotated 90 degrees by the rotation mechanism 31 to perform the same measurement and the calculation of the distance, and the quality of the ball 20 is determined based on the calculation results.

Therefore, it is not necessary to move the soft X-ray element array 32 as in the second embodiment described above, so that the mechanism configuration of the measuring section 11 is simplified and the apparatus can be downsized.

Next, a fourth embodiment of the present invention will be described.

FIG. 13 shows an inspection apparatus 10D according to the fourth embodiment.
FIG. In the figure, the same components as those in the third embodiment described above are denoted by the same reference numerals, and description thereof will be omitted. The fourth embodiment differs from the third embodiment in that the fourth embodiment has a soft X-ray element array 32C and a driving unit 16C thereof according to the third embodiment, a coloring fluorescent plate 33, and a CCD camera. 34, a digital filter 13, a signal spectroscope 14, and a memory 15 are additionally provided, and the soft X-ray element array 32C, the color fluorescent plate 33, and the soft X-ray element
Is located at a position that is different from the position by 90 degrees. Thus, the rotation mechanism 31 and the rotation drive unit 17 are eliminated.

According to the above configuration, a mechanically moving mechanism is further eliminated, and the displacement of the core 21 in each of the X, Y, and Z axis directions of the three-dimensional coordinates can be detected. Inspection device.

The embodiments described above are merely specific examples of the present invention, and the present invention is not limited to only these embodiments. For example, another element may be used as the soft X-ray element, or the soft X-ray applied to the ball 20 using a slit may be linear.

The change in the wavelength along the X-axis may be detected by moving one soft X-ray element 32a along a straight line.

[0070]

As described above, according to the method for inspecting the internal structure of a ball according to the first to seventh aspects of the present invention, the ball to be inspected is irradiated with soft X-rays and transmitted to the transmission path. Since the quality of the internal configuration of the ball can be determined based on the wavelength of the soft X-ray which changes depending on the type of the substance present, the inspection can be performed with high accuracy without breaking the ball to be inspected. .

According to the ball internal structure inspection apparatus of the present invention, the ball to be inspected is irradiated with soft X-rays and changes depending on the type of the substance present in the transmission path. Since the quality of the internal configuration of the ball can be determined based on the soft X-ray wavelength, the inspection can be performed with high accuracy without destroying the ball to be inspected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an inspection device according to a first embodiment of the present invention.

FIG. 2 is a side view showing a measuring unit of the inspection device according to the first embodiment of the present invention.

FIG. 3 is a front view showing a soft X-ray element array according to the first embodiment of the present invention.

FIG. 4 is a view for explaining the relationship between the internal structure of a ball and the wavelength of transmitted soft X-rays in the first embodiment of the present invention.

FIG. 5 is a view for explaining the relationship between the internal structure of a ball and the wavelength of transmitted soft X-rays in the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating inspection processing of a central processing unit according to the first embodiment of the present invention.

FIG. 7 is a configuration diagram showing an inspection device according to a second embodiment of the present invention.

FIG. 8 is a side view showing a measuring unit of the inspection device according to the second embodiment of the present invention.

FIG. 9 is a diagram showing irradiation positions of soft X-rays according to a second embodiment of the present invention.

FIG. 10 is a configuration diagram showing an inspection device according to a third embodiment of the present invention.

FIG. 11 is a front view showing a soft X-ray element array according to a third embodiment of the present invention.

FIG. 12 is a diagram illustrating measurement in the Y-axis direction according to a third embodiment of the present invention.

FIG. 13 is a configuration diagram showing an inspection device according to a fourth embodiment of the present invention.

[Explanation of symbols]

10, 10B, 10C, 10D ... inspection device, 11, 11
B, 11C, 11D: measuring unit, 12: central processing unit, 13
... Digital filter, 14 ... Signal spectroscope, 15 ... Memory, 16, 16C ... Soft X-ray element drive unit, 17 ... Rotation drive unit, 18 ... Operation unit, 19 ... Display unit, 20 ... Golf ball, 21 ... Core, 22: shell part, 31: rotating mechanism, 31
a: support table, 32, 32C: soft X-ray element array, 32a
.., A soft X-ray element, 33, a coloring fluorescent plate, 34, a CCD camera, 41, a vertical movement mechanism,

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G01T 1/36 G01T 1/36 A F term (reference) 2G001 AA01 AA09 AA10 AA20 BA12 CA01 DA01 DA02 DA09 DA10 EA07 EA20 FA01 FA06 GA04 GA05 HA12 HA13 JA01 JA08 JA11 JA20 KA03 LA20 PA12 2G088 EE29 FF02 GG09 JJ04 JJ05 KK32 KK35

Claims (12)

[Claims] 1. A method for inspecting the internal structure of a ball having at least one layer made of a material different from the core around a core, the method comprising the steps of: Receiving soft X-rays transmitted through the ball using a color-emitting fluorescent plate that emits a color corresponding to the wavelength of the soft X-rays, based on the type of color and the color-forming position in the color-emitting fluorescent plate, A method for inspecting the internal structure of a ball, comprising: detecting a substance composition; and comparing the internal configuration of the ball obtained from the detection result with a configuration of an inspection standard to determine a pass / fail. 2. The internal structure of a ball according to claim 1, wherein the soft X-ray is irradiated to the ball such that the irradiation position or the locus of the irradiation position overlaps a straight line on the coloring fluorescent plate. Inspection methods. 3. The ball according to claim 2, wherein the irradiation position of the soft X-ray is moved while irradiating the soft X-ray in the form of a spot having a diameter smaller than the diameter of the ball. Internal structure inspection method. 4. The ball according to claim 2, wherein a plurality of spot-shaped soft X-rays having a diameter smaller than the diameter of the ball are irradiated on the ball such that irradiation positions are aligned on the straight line. Method for inspecting the internal structure of balls. 5. A straight line for irradiating the soft X-rays in a direction perpendicular to a straight line for irradiating the soft X-rays in a plane of the color-developing phosphor plate, and the inside of the ball in two or more different straight lines is moved. 5. The ball internal structure inspection method according to claim 2, wherein a material composition is detected, and the quality is determined based on the two or more detection results. 6. A pass / fail judgment is made based on the detection results when the ball is irradiated with the soft X-ray from two or more different directions. The method for inspecting the internal structure of a ball according to any one of the above. 7. The method for inspecting the internal structure of a ball according to claim 1, wherein a material spectrum inside the ball is detected by analyzing a color spectrum of the color fluorescent plate. 8. A ball internal structure inspection device for inspecting the internal structure of a ball having at least one layer made of a material different from the core around the core, the device supporting the ball to be inspected. A soft X-ray irradiator that irradiates the ball with soft X-rays so as to be in a straight line within a predetermined plane; Receiving a soft X-ray transmitted through the ball, and emitting a different color corresponding to the wavelength of the soft X-ray, a color-developing fluorescent plate, and an electric signal corresponding to a color-developing type of the color-developing fluorescent plate and a color-forming position on the color-developing fluorescent plate And a pass / fail determination unit that determines pass / fail by comparing the type of coloring at each of the coloring positions with the type of inspection reference based on the electric signal output from the signal generating unit. Specially Internal structure inspecting apparatus of the ball to. 9. An X-ray element array in which a plurality of X-ray radiating elements for radiating soft X-rays in a beam shape having a spot diameter smaller than the diameter of the ball are arranged in a straight line. 9. The apparatus for inspecting the internal structure of a ball according to claim 8, comprising: 10. A soft X-ray irradiator comprising: a first irradiator and a second irradiator corresponding to each of the two color fluorescent plates, the two color fluorescent plates being arranged so that their surfaces are orthogonal to each other. The signal generation means outputs an electric signal corresponding to a color type in each of the two color fluorescent plates and a color position on the color fluorescent plate.
An apparatus for inspecting the internal structure of a ball according to claim 9. 11. The apparatus according to claim 9, wherein the X-ray radiating element comprises an X-ray diode. 12. The apparatus according to claim 1, wherein said pass / fail judgment means judges pass / fail by comparing a coloring position at least one of a maximum value and a minimum value in a wavelength change of said soft X-ray with said inspection reference value. An internal structure inspection device for a ball according to any one of claims 8 to 10.