JP3155681B2 - Coil winding shape measuring method, its measuring device, and coil winding shape monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding shape measuring method and apparatus for measuring the winding shape of a coil obtained by winding a steel plate by using an image processing technique, and to monitor an abnormality of the coil winding shape. The present invention relates to a coil winding shape monitoring device.

[0002]

2. Description of the Related Art In a steel sheet production line, for example, rolling,
The steel plate manufactured and processed by the pickling and surface treatment line is wound into a coil by a mandrel, and then transported to the yard by an overhead crane. At this time, a hook for hanging is inserted into the inner diameter portion of the coil. However, if the wound shape of the wound coil has irregularities, there is a risk that the coil end face may be damaged when the hook is inserted. Therefore, at present, the coil end face is visually inspected after the worker winds up the steel plate. If the winding shape has irregularities, the shaping work has been carried out to strike the portion and correct it. In addition, when correction was impossible, the coil had to be rewound in some cases.

Conventionally, the inspection of the coil winding shape has been performed by a visual inspector. However, the inspection is also performed at a coil winding site, which involves a risk. Further, in order to automate the shaping work of the coil, it is a technical problem to reduce the visual inspection labor. That is, there is a demand for a measuring device capable of safely inspecting the coil winding shape and automatically measuring the coil winding shape.

FIG. 5 shows a coil winding shape detecting device disclosed in Japanese Patent Application Laid-Open No. 5-325528. In the same figure, a laser device 20 and a line sensor camera 21 are integrally arranged on the side of the coil 24, and the laser device 20 irradiates a spot light to the end face of the coil 24,
Utilizing the relative distance between the coil 24 and the apparatus when the laser beam moves, the laser beam irradiation position in the radial direction of the coil end surface is imaged by the line sensor camera 21 and the image signal is transmitted to the computer 2.
2 and process the line image to change the winding shape to CRT2.
3 is displayed.

As another example, Japanese Utility Model Publication No. Sho 62-37
There is a coil shape measuring device disclosed in Japanese Patent Publication No. 122.
Referring to FIG. 6, a beam (beam) 26 is laid over the transport line pit 25, and a frame 27 is fixed to a center position of the beam 26 on the transport line. This frame 2
7, a driving device 28 is attached to the upper end of the light source 7, and a screw 31 is connected to the output shaft.
Nut 3 in box 30 with built-in detection device consisting of
By fixing 1, the detecting device is moved up and down by the screwing operation of the screw 29 and the nut 31.

The driving device 28 is moved based on the width of the coil 24 to be measured, and the distance between the detecting device in the box 30 and the end face of the coil is controlled to a predetermined value. Thereafter, the output of the detection device is stored in synchronization with the position of the coil being conveyed, and the winding shape of the coil 24 is measured.

[0007]

Any of the conventional coil winding shape measuring devices as described above is a method for measuring a coil winding shape by using relative movement between a coil and a detecting device. For example, it is extremely difficult to stably transport a coil that is a heavy object exceeding 10 tons at a constant speed. The coil moves while swaying on the conveyer. Therefore, if the speed of the conveyer is uneven, there is a disadvantage that the measurement accuracy of the portion is deteriorated.

When the coil conveying method is in the direction of the center axis of the coil, the method of measuring the coil winding shape needs to stop the coil conveyance and move the detecting device to perform the measurement. There are problems such as the scale and cost.

That is, one of the conventional coil winding shape measuring methods is based on the distance measurement at one point, and utilizes the movement of the other axis by moving the coil by scanning. In another method, the coil shape is measured by temporarily stopping the conveyance of the coil and moving the measuring device itself. Therefore,
It is considered that the above-described problem occurs, and there is room for improvement in the conventional coil winding shape measuring method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a coil winding shape measuring method and a measuring device for measuring a winding shape of a coil end surface by one-dimensionally scanning a spot light, and a coil winding device. It is an object of the present invention to provide a shape monitoring device.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a first invention is to provide a spot light irradiating means arranged at a predetermined coordinate and a spot light from the spot light irradiating means. One-dimensional scanning means arranged at coordinates and one-dimensionally scanning the coil end surface at a predetermined irradiation angle, and one-dimensional photoelectric conversion means arranged at predetermined coordinates to capture a reflected image of the spot light applied to the coil end face And, from the reflection image of the spot light from the coil end face imaged by the one-dimensional photoelectric conversion means, the coordinates of the intersection of the reflected light axis passing through the reflection position of the spot light and the one-dimensional axis and the coordinates of the spot light Calculating means for calculating coordinates of a reflection position of the coil end face from an irradiation angle; calculating a two-dimensional position of the coil end face from the coordinates of the reflection position; Coil winding shape measuring apparatus characterized by measuring the shape.

In a second aspect of the present invention, when the optical axis of the one-dimensional photoelectric conversion means is the y-axis and the field of view of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis, the one-dimensional photoelectric conversion means is provided. y
It is arranged at the coordinates (0, a) on the axis, and the light source is set to the coordinates (xs, y).
s), a spot light emitted from the light source at an angle α is one-dimensionally scanned on the coil end surface by a scanning unit, and reflected light from the coil end surface is imaged by the one-dimensional photoelectric conversion unit. The one-dimensional image captured by the one-dimensional photoelectric conversion means is stored in the first storage means, and the one-dimensional image is image-processed, and the coordinates (x
t, 0), the coordinates (x, y) of the spot light irradiation position are calculated based on the following equation, and the coordinates (x, y) are calculated.
A coil winding shape measuring method characterized by storing the value of y) in a second storage means and measuring the shape of the coil winding side surface.

X = [(1−y / a) × xt], y = (ys × tanα−xt + xs) / (tanα−x
t / a)

Here, a is the coordinate y of the one-dimensional photoelectric conversion means.
Coordinates, xt is the x coordinate of the coordinate point where the reflection light axis of the light reflected by the light source intersects the x axis, xs is the x coordinate of the light source, ys is the y coordinate of the light source, α is the irradiation angle of the light source, x is the spot light X coordinate of irradiation position, y is y coordinate of spot light irradiation position,

In the third invention, the coordinate on the y-axis (where the optical axis of the one-dimensional photoelectric conversion means is the y-axis and the field of view of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis). 0, a)
One-dimensional photoelectric conversion means arranged at the coordinates (xs, ys)
The light source disposed in the, the scanning means for one-dimensionally scanning the coil end face with the spot light irradiated from the light source at an angle α, and the reflected light from the coil end face is imaged by the one-dimensional photoelectric conversion means, First storage means for storing a one-dimensional image captured by the one-dimensional photoelectric conversion means;
The coordinates (xt, 0) of the intersection between the spot irradiation position and the x-axis are extracted based on the one-dimensional image information stored in the storage means, and the coordinates (xt, 0) of the intersection and the irradiation angle α from the light source are extracted. A coordinate point calculating means for calculating the coordinates (x, y) of the spot irradiation position from a second storage means for storing the coordinates (x, y) of the spot light irradiation position; Is a coil winding shape measuring device characterized by measuring the following.

According to a fourth aspect of the present invention, in the fourth aspect, the optical axis of the one-dimensional photoelectric conversion means is arranged substantially perpendicular to a range to be measured on the end face of the coil. Is a coil winding shape measuring device.

According to a fifth aspect of the present invention, when the optical axis of the one-dimensional photoelectric conversion means is the y-axis and the visual field of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis, the coordinates ( 0, a)
One-dimensional photoelectric conversion means arranged at the coordinates (xs, ys)
A light source, a scanning unit that performs one-dimensional scanning on the coil end surface at an angle α from the light source, and an image of reflected light of the spot light from the coil end surface captured by the one-dimensional photoelectric conversion unit. First storage means for storing a one-dimensional image picked up by the photoelectric conversion means; and coordinates (x) of an intersection of a spot irradiation position and an x-axis based on the one-dimensional image.
t, 0), and calculates the coordinates (x, y) of the spot irradiation position, and the coordinates (x, y) of the spot light irradiation position of the spot light by the coordinate point calculation means. (X, y) obtained from the coil winding shape measurement circuit device having the second storage means for storing
A coil winding shape monitoring device that monitors a coordinate (0, y) in the y-axis direction and outputs a coil winding shape abnormality signal when a predetermined threshold value is exceeded.

[0018]

FIG. 1 shows a method of measuring a coil winding shape according to the present invention.
This will be described with reference to FIG. The light-receiving part of the one-dimensional photoelectric conversion means,
Means are provided so as to face the spot light scanning surface by the spot light irradiating means, and means for performing one-dimensional scanning of the spot light in the radial direction of the coil end face S of the coil A by the spot light irradiating means is provided. So that the reflected light of the spot light can be imaged by one-dimensional photoelectric conversion means,
The light source is located at coordinates (xs, ys) and coordinates (xs, y)
s) A spot light is irradiated from the light source to the coil end surface S at an irradiation angle α, and a one-dimensional image (line image) obtained by the reflected light from the coil end surface S is subjected to image processing to extract a spot light irradiation position (reflection position). , The reflected optical axis and x
The coordinates (xt, 0) of the intersection with the axis are calculated, and the coordinates (x, y) of the spot light irradiation position on the coil end surface are calculated as (1),
It is calculated by equation (2). The value xt on the x-axis is calculated by the irradiation angle α of the spot light of the light source.

X = (1−y / a) × xt (1) y = (ys × tanα−xt + xs) / (tanα−xt / a) (2)

Here, a is y of the coordinates of the one-dimensional photoelectric conversion means.
Coordinates, xt is the x coordinate of the coordinate point where the reflection light axis of the light reflected by the light source intersects the x axis, xs is the x coordinate of the light source, ys is the y coordinate of the light source, α is the irradiation angle of the light source, x is the spot light X coordinate of irradiation position, y is y coordinate of spot light irradiation position,

As described above, according to the present invention, after extracting the coordinates (xt, 0) of the intersection of the x-axis and the reflected light axis passing through the spot light irradiation position (reflection position), the expressions (1) and (2) are obtained. To calculate the coordinates (X, Y) of the spot light irradiation position,
The coil winding shape is measured by the coordinate group.

Conventionally, the coil conveying direction is the direction of the coil winding center line, and it is difficult to measure the coil end surface S from the vertical direction. However, in the coil winding shape measuring apparatus according to the present invention, the one-dimensional photoelectric conversion means Since the light receiving section is arranged so as to face the coil end face, the irradiation angle α of the spot light irradiated obliquely to the coil end face S and the radial direction of the coil end face are set as the measurement range. Variations in the overall measurement resolution are prevented.

As is apparent from the equations (1) and (2), one-dimensional scanning of the spot light is performed by changing at least one of xs, ys, and the angle α, and the spot light is scanned. The coil winding shape can be measured by irradiating the measurement range of the coil end face and providing a means for detecting a variation in xs, ys, and angle α.

Further, the value in the y-axis direction is monitored by the coil winding shape monitoring device according to the y-axis direction coordinates of the spot light irradiation position obtained from the coil winding shape measuring device, and the value is set to a predetermined value. If it exceeds, it is determined that the coil winding shape is abnormal, and the coil conveying line can be stopped.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic view showing one embodiment of the coil winding shape measuring device and the coil winding shape monitoring device according to the present invention.

In FIG. 1, the coil winding shape measuring device includes a detecting head 4 and a coil winding shape measuring circuit device 5. The detecting head 4 emits, for example, a laser device 1 and a laser beam radiated from the laser device 1. Coil end face S of coil A
A scanning device 2 such as a rotating mirror or a galvanometer mirror that irradiates the light with a one-dimensional photoelectric conversion means (hereinafter, referred to as a linear array camera) 3.

The spot light emitted from the spot light source is applied to the coil end surface S of the coil A, and the reflected light of the spot light is imaged by the linear array camera 3. The one-dimensional image (line image) captured by the linear array camera 3 is input to the coil winding shape measurement circuit device 5 as an image signal (video signal), subjected to image processing, and the luminance of light reflected from the coil end surface S The spot light irradiation position is extracted by the average image according to. Of course, the linear array camera may be a one-dimensional PSD element.

The image signal subjected to image processing by the coil winding shape measuring circuit device 5 and feature extraction is input to the coil winding shape monitoring device 16. The coil winding shape monitoring device 16 displays the coil winding shape on the CRT 17.
Further, when there is an abnormality in the coil winding shape, a winding abnormality signal can be output.

The arrangement of the detection head 4 and the coil A will be described with reference to FIG. This positional relationship is an important factor when measuring the shape of the coil end surface S.

In the figure, the coil end surface S of the coil A having a normal winding shape is set on the x-axis, and the coil winding shape is measured based on the x-axis. The direction of the center axis of the coil is defined as the y-axis. The linear array camera 3 is arranged at a coordinate a on the y-axis. Spot light source is coordinates (xs, ys)
To place. The light receiving surface of the linear array camera 3 is disposed so as to face the coil end surface S of the coil A. For example, the position of the linear array camera 3, the coil end surface S of the coil A and the spot light source is fixed, and the spot light is one-dimensionally scanned on the coil end surface S.

Next, the coil winding shape measuring circuit device will be described with reference to the block diagram of FIG. Note that FIG.
In FIG. 2, the same parts as those in FIG.

In the figure, a coil winding shape measuring circuit device includes an image storage circuit 6, a spot light irradiation position extraction circuit 7, a coordinate point calculation circuit 8, a coordinate point storage circuit 9, a scanning device control circuit 10 , A scanning position detection circuit 11 and an arithmetic control circuit 12.

Next, each circuit element will be described. The image storage circuit 6 stores pixel signals obtained by digitizing an image captured by the linear array camera 3 by an A / D converter. The spotlight irradiation position extraction circuit 7 reads out the pixel signals stored in the image storage circuit 6, performs threshold processing or binarization processing on the pixel signals, and then performs averaging processing to extract the spotlight irradiation position. The coordinate point calculation circuit 8 calculates the coordinates (x, y) of the spot light irradiation position from the coordinates a, the coordinates xt, the irradiation angle α, and the coordinates (xs, ys) of the spot light source on the y-axis of the linear array camera 3. . These coordinates (x,
y) is stored in the coordinate point storage circuit 9. When a series of calculations and storage for outputting the scanning position of the scanning device 2 is completed in the scanning position detection circuit 11, the arithmetic control circuit 12 gives a command to the scanning device control circuit 10 to rotate the scanning device 2 to the next scanning position. Let it. The arithmetic control circuit 12 controls these circuits based on the coil winding shape calculation sequence shown in the flowchart of FIG.

Next, an embodiment of the coil winding surface shape measuring method according to the present invention will be described with reference to FIGS. First, the strip-shaped steel sheet treated by rolling, pickling, or the like is wound around a mandrel 15, then placed on a coil car 13 and transported by a transport line 14 to a position where the overhead crane is suspended. A photoelectric sensor or the like for detecting the presence or absence of the coil A is installed in the middle of the transport line 14,
The coil A mounted on the coil car 13 is detected by a photoelectric sensor and stops at a predetermined position.

Subsequently, the spot light emitted from the laser device 1 via the scanning device 2 is one-dimensionally scanned on the coil end surface S. The spot light reflected by the coil end surface S is imaged by the linear array camera 3.

An image signal picked up by the linear array camera 3 is stored in the image storage circuit 6 as a pixel signal digitized by the A / D converter. In the image storage circuit 6, for example, the image mesh of 2048 points is subjected to A / D conversion of the luminance of each point in 256 steps and stored for one line. The pixel signal is sent to the spot light irradiation position extraction circuit 7 based on a command from the arithmetic control circuit 12. The spot light irradiation position extraction circuit 7 binarizes the pixel signal with a preset threshold value to extract a spot light irradiation position, that is, a point whose brightness is higher than the threshold value is extracted by an averaging process or the like.

The coordinates (x, y) of the spot light irradiation position are calculated by the coordinate point calculation circuit 8. At this time, the coordinate point calculation circuit 8 calculates the coordinates (x, y) of the spot light irradiation position.
Is calculated by the equations (1) and (2) shown above.
The data of the coordinates (x, y) of the spot light irradiation position is stored in the coordinate point storage circuit 9.

Next, the coil winding shape calculation sequence shown in FIG. 4 is written in the calculation control circuit 12 for controlling these circuits, and will be described with reference to the flowchart.

First, in step S1, a command is given to the scanning device control circuit 10, the spot light is set to the initial position by the primary scanning means, and irradiation of the scanning device 2 is started from the initial position. As shown in step S2, the one-dimensional captured image is obtained by the linear array camera 3 (one-dimensional photoelectric conversion means). Subsequently, the process proceeds to step S3, where the one-dimensional image captured by the linear array camera 3 is A / A
It is converted into a pixel signal by D conversion and stored in the image storage circuit 6.

Thereafter, in step S4, the pixel signal stored in the image storage circuit 6 is called out, and a pixel having a luminance equal to or higher than a predetermined threshold is extracted by the spot light irradiation position extraction circuit 7, and the spot light irradiation position is extracted. From the coordinate xt on the x-axis. As another example, when a one-dimensional semiconductor position detecting element (PSD) is used, a bright spot position is obtained as an electric signal, and this is subjected to A / D conversion to obtain a spot light irradiation position.

Thereafter, the process proceeds to step S5, where the coordinate point calculation circuit 8 calculates the value based on the above-described equations (1) and (2).
The two-dimensional coordinates (x,
y) is calculated, and then the process proceeds to step S6, where the coordinates (x, y) are stored in the coordinate storage circuit 9.

Further, proceeding to step S7, when the calculation at the first spot light position is completed, the arithmetic control circuit 12 gives a command to the scanning device control circuit 10, and the scanning device 2 outputs the spot light to the next spot light position. Move.

If the spot light position has not reached the final position in step S8, the position of the spot light is updated again and the irradiation of the spot light is repeated, and the above calculation is performed until the spot light position reaches the end point position. When the coordinates of the spot light irradiation position are repeatedly stored and the end point position is reached, the calculation and storage processing in the series of image processing is completed as described above. The measurement of the shape of the coil end face is completed.

After the pixel signals for one image are stored in the coordinate point storage circuit 9 through such processing steps, the coordinate group data stored in the coordinate point storage circuit 9 is transmitted to the coil winding shape monitoring device 16. Output and the coil winding shape is displayed on the CRT 17.

On the other hand, in the coil winding shape monitoring device 16,
The degree of protrusion from the x-axis in the y-axis direction is measured. If the degree of protrusion in the y-axis direction exceeds a predetermined threshold,
It determines that there is an abnormality in the coil winding shape, outputs a winding abnormality signal, and stops the conveyance of the coil A.

Next, a method of calculating the spot light irradiation position (reflection position) will be described with reference to FIGS. As described above, the linear array camera 3 is arranged at the coordinate a on the y-axis, that is, at the coordinate (0, a) with the coil end surface S serving as the reference being the x-axis, and the light source is controlled by the laser device 1 or the like. Is located at coordinates (xs, ys). The spot light is applied to the coil end surface S of the coil A at an angle α by the scanning device 2.

The spot light irradiation position is extracted from the one-dimensional image, and the coordinates (xt, 0) of the point where the reflected light axis of the reflected light incident on the linear array camera 3 from the spot light irradiation position intersects the x axis. Is calculated.

Therefore, the coordinates (x, y) on the coil end surface S
Is calculated based on the equations (1) and (2) shown above.

As described above, according to the present invention, the coil winding shape measuring circuit device 5 measures the shape of the coil end surface S as a group of coordinates of the spot light irradiation position. On the other hand, in the coil winding shape monitoring device 16, the coil winding shape is determined by the coil winding shape measuring circuit device 5 based on the coordinate group.
7 and the coil winding shape is monitored. The coil winding shape monitoring device 16 outputs an abnormal signal indicating that the coil winding shape is abnormal if the coil shape is abnormal, for example, if the irregularities on the coil winding surface are equal to or more than a predetermined value. A coil conveyance stop signal is manually input to the coil winding shape monitoring device 16 based on the coil winding shape abnormality signal, and the conveyance line 14 stops. Alternatively, the transport line 14 is automatically stopped by the coil winding shape abnormality signal.

Of course, in the above-described coil winding shape measuring method, the one-dimensional scanning direction can be any of 360 degrees as the radial direction around the coil winding center axis. Further, it is preferable that the one-dimensional photoelectric conversion means be arranged so that the optical axis surface is substantially perpendicular to the coil end surface.

Further, a detection head is installed at a position at least の of the maximum outer diameter (measured range) of the coil from the center line of the coil transfer line, and the radial direction of the upper or lower end of the coil is defined as the measured range. I do.

In the above embodiment, the coordinates (x, y) of the spot light irradiation position (reflection position) are calculated by changing the irradiation angle α of the spot light. For example, xs, ys, angle by changing at least one of α,
It is clear that the coil winding shape can be measured by irradiating the spot to be measured on the coil end face with the spot light and detecting the amount of change in xs, ys, and angle α.

[0053]

As described above, according to the present invention,
The following effects can be obtained.

(1) The spot light source is one-dimensionally scanned and the shape of the coil end face is measured by a one-dimensional image (line image) based on the reflected image, so that the relative movement of the entire measuring apparatus and the coil is required. There is an advantage that there is no deterioration in the measurement accuracy due to the speed unevenness during the coil movement, and there is no limit on the relationship between the coil end surface and the transport direction.

(2) By using a light source having a strong output such as a laser beam, there is an advantage that it is hard to be affected by the influence of the background light, the surface properties of the coil end face, the shape, the oiling state, etc., and the detection accuracy is high. Coil shape measurement is possible.

(3) By applying the present invention to a coil winding shape monitoring device, there is an advantage that abnormality monitoring of the coil shape can be automated and contribute to labor saving of monitoring personnel at a manufacturing site.

(4) By outputting a coil winding shape abnormality detection signal from the coil winding shape monitoring device, it is possible to automatically stop the coil transfer line, which is extremely effective for manufacturing steel plates and the like. It is.

[Brief description of the drawings]

FIG. 1 is a principle diagram for explaining a coil winding shape measuring method of the present invention.

FIG. 2 is a schematic diagram showing one embodiment of a coil winding shape measuring device and a coil winding shape monitoring device of the present invention.

FIG. 3 is a block diagram showing one embodiment of a coil winding shape measuring device and a coil winding shape monitoring device of the present invention.

FIG. 4 is a flowchart showing a coil winding shape measuring method of the present invention.

FIG. 5 is a diagram showing a conventional coil winding shape measuring device.

FIG. 6 is a diagram showing a conventional coil winding shape measuring device.

[Explanation of symbols]

 Reference Signs List 1 laser light source 2 scanning device 3 linear array camera (one-dimensional photoelectric conversion means) 4 detection head 5 coil winding shape measuring circuit device 6 image storage circuit 7 spot light irradiation position extraction circuit 8 coordinate point calculation circuit 9 coordinate point storage circuit 10 Scanning device control circuit 11 Scanning position detection circuit 12 Operation control circuit 13 Coil car 14 Transport line 15 Mandrel 16 Coil winding shape monitoring device 17 CRT A coil S Coil end face

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000002118 Sumitomo Metal Industries, Ltd. 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka (72) Inventor Masaaki Kawakami 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hideya Tanabe 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hiroshi Sekine 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Stock Inside the company (72) Inventor Ichizumi Tsukuda 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Inside Steel Works Chiba Works (72) Inventor Yasuhiro Tsutsumi 1-3-18 Wakihama-cho, Chuo-ku, Kobe City, Hyogo Prefecture Inside Kobe Steel Works, Ltd. (72) Person Yukio Takabayashi 1-318 Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo Inside Kobe Steel, Ltd. (72) Inventor Koji Fujiwara 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. (72 ) Inventor Seichi Ishimoto 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries, Ltd. Wakayama Works (56) References JP-A-57-101708 (JP, A) JP-A-5-107028 (JP, A) 6-258040 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01B 11/00-11/30

Claims (5)

(57) [Claims] 1. A spot light irradiating unit arranged at a predetermined coordinate, a one-dimensional scanning unit arranged at a predetermined coordinate with a spot light from the spot light irradiating unit, and one-dimensionally scanning a coil end surface at a predetermined irradiation angle, A one-dimensional photoelectric conversion unit arranged at predetermined coordinates for imaging a reflection image of the spot light applied to the coil end surface, and a reflection image of the spot light from the coil end surface imaged by the one-dimensional photoelectric conversion unit Computing means for calculating the coordinates of the reflection position of the coil end face from the coordinates of the intersection of the reflected light axis and the one-dimensional axis passing through the reflection position of the spot light and the irradiation angle of the spot light, A coil winding shape measuring device, wherein a two-dimensional position of the coil end surface is calculated from coordinates of a reflection position, and a shape of the coil end surface is measured. 2. The optical axis of the one-dimensional photoelectric conversion means is defined as a y-axis,
Assuming that the field of view of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis, the one-dimensional photoelectric conversion means has coordinates (0,
a), a light source is arranged at coordinates (xs, ys), a spot light emitted from the light source at an angle α is one-dimensionally scanned on the coil end face by a scanning unit, and a reflected light from the coil end face is scanned. Is captured by the one-dimensional photoelectric conversion means, the one-dimensional captured image by the one-dimensional photoelectric conversion means is stored in the first storage means, the one-dimensional captured image is image-processed, and the spot light irradiation position and the x-axis are compared. The coordinates (xt, 0) of the intersection are extracted, the coordinates (x, y) of the spot light irradiation position are calculated based on the following equation, and the value of the coordinates (x, y) is stored in the second storage means. A coil winding shape measuring method, wherein the coil winding side surface shape is measured by using the method. x = [(1-y / a) × xt] y = (ys × tan α-xt + xs) / (tan α-x
t / a) where a is the y-coordinate of the coordinates of the one-dimensional photoelectric conversion means, xt is the x-coordinate of a coordinate point where the reflected light axis of the light reflected by the light source intersects the x-axis, xs is the x-coordinate of the light source, ys Is the y coordinate of the light source, α is the irradiation angle of the light source, x is the x coordinate of the spot light irradiation position, y is the y coordinate of the spot light irradiation position, 3. The optical axis of the one-dimensional photoelectric conversion means is defined as a y-axis,
Assuming that the field of view of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis, the one-dimensional photoelectric conversion means arranged at coordinates (0, a) on the y-axis and a light source arranged at coordinates (xs, ys) When,
A scanning unit that one-dimensionally scans the end face of the coil with spot light emitted from the light source at an angle α, and that the reflected light from the end face of the coil is imaged by the one-dimensional photoelectric conversion unit, and the one-dimensional photoelectric conversion unit A first storage unit for storing the captured one-dimensional image; extracting coordinates (xt, 0) of an intersection between the spot irradiation position and the x-axis based on the one-dimensional image information stored in the first storage unit; , The coordinates of the intersection (x
(t, 0) and the coordinates (x, y) of the spot irradiation position from the irradiation angle α from the light source, and a second storing the coordinates (x, y) of the spot light irradiation position. A coil winding shape measuring device comprising: a storage means for measuring the shape of the coil end surface. 4. The coil winding shape measuring apparatus according to claim 3, wherein an optical axis of said one-dimensional photoelectric conversion means is arranged substantially perpendicular to a range to be measured on said coil end face. 5. The optical axis of the one-dimensional photoelectric conversion means is defined as a y-axis,
Assuming that the field of view of the one-dimensional photoelectric conversion means orthogonal to the optical axis is the x-axis, the one-dimensional photoelectric conversion means arranged at coordinates (0, a) on the y-axis and a light source arranged at coordinates (xs, ys) When,
A scanning unit that performs one-dimensional scanning on the coil end surface at an angle α from the light source, and the reflected light of the spot light from the coil end surface is imaged by the one-dimensional photoelectric conversion unit, and is imaged by the one-dimensional photoelectric conversion unit. First storage means for storing a one-dimensional image; extracting coordinates (xt, 0) of an intersection between the spot irradiation position and the x-axis based on the one-dimensional image; , Y), and a coil winding shape measuring circuit comprising: a coordinate storage unit for storing coordinates (x, y) of the spot light irradiation position of the spot light by the coordinate point calculation unit. Coil winding characterized by monitoring a coordinate (0, y) in the y-axis direction of a coordinate group (x, y) obtained from the apparatus and outputting a coil winding shape abnormality signal when exceeding a predetermined threshold value. Shape monitoring device.