JP3656559B2 - Coil winding shape measurement method - Google Patents

Description

【００１０】
【発明の実施の形態】
以下図面を参照して本発明の実施の形態を説明する。図２は測定される金属板コイル１０を示し、図２（ａ）は側面図、図２（ｂ）はその一部を示す縦断面図である。コイル１０の端面２０に対向して巻形状測定装置２００が設けられている。図３に本発明の実施に用いた巻形状測定装置２００の外観を示す。巻形状測定装置２００は立設架構２０１に設けた昇降用リニアガイドレール２０２に沿って昇降するフレーム２０４にレーザ距離計２０３を装着している。モータ２０９は下部スプロケット２０７、上部スプロケット２０５を介してチェーン２０６を駆動し、フレーム２０４を昇降させる。フレーム２０４は昇降用リニアガイドレール上を摺動走行するサドル２０８を備え、円滑に正確に精度よく昇降する。チェーン緩みセンサ２１０はチェーンの緩みを監視し、昇降精度を保持する。ケーブルベア２１１、２１２は距離計の測定データ、移動データを伝達するケーブルを保持している。フレーム２０４の昇降ストロークの最下端にはクッション２１３が設けられ衝撃を防止するようになっている。
【００１１】
この巻形状測定装置２００は高さが約５ｍであり、高さ７００ｍｍ程度のコイル載置サドル上に載置した外径１１００ｍｍ〜２４００ｍｍφのコイルの鉛直直径に沿って測定ができる。コイル端面に対向して配置した距離計を昇降装置によってコイル径方向に走査させ、距離計によって検出されるコイル径方向の距離計とコイル端面間の距離変化からコイルの巻形状を測定する。
【００１２】
図１は本発明の実施例のコイル巻形状測定方法を示す説明図で、図２（ｂ）の一部分３０の部分拡大図である。金属板１１、１２、１３、１４、……が層を成しており、コイルの一端面に平行に直径に亘って距離計を走査して該距離計とコイル端面間の距離データを採取し、距離計により測定された距離データ４０を記載してある。距離データ４０の内、距離データの極小値をトレース処理してコイル端面を認識し、金属板１１、１２、１３、１４に対応するピークトレースデータ４１、４２、４３、４４を求める。
【００１３】
次に、コイル端面部分の曲がりによる隙間判定のためのしきい値αを定める。隣接するピークトレースデータ、例えば金属板１１と１２のピークトレースデータ４１と４２の相互間の測定データ４５をピークトレースデータ４１と比較する。その差がαより大きい距離データを巻緩みデータと認識する。すなわち、下記（１）式を充足する測定データを巻緩みデータと判断する。
【００１４】
α＜（測定データ）−（ピークトレースデータ） ……（１）
ここでしきい値αは例えば経験的に定めることができる。さらに、前記巻緩みデータの数をカウントし、下記（２）式より巻緩み量を求める。
【００１５】

これにより図に示すように、巻緩み及びコイル端面部分の曲がりにより隙間も巻緩みとして正確に認識することができる。また図に実施結果を示す。
【００１６】
【発明の効果】
本発明によれば、金属板コイルの端面に沿って距離計を走査してコイル端面と距離計との距離を測定する技術を用いてコイルの巻緩みを検出することができ、テレスコープ量の正確な判断を妨げることなく、板端の曲がりによる緩みも含めて、コイルの巻緩みを正確に認定することができるという優れた効果を奏する。
【図面の簡単な説明】
【図１】本発明の説明図でコイル縦断面の部分拡大図である。
【図２】コイルの（ａ）側面図及び（ｂ）縦断面図である。
【図３】距離計の全体図である。
【図４】コイルのつぶれを示す側面図である。
【図５】従来技術の説明図である。
【図６】従来技術の説明図である。
【符号の説明】
１０ コイル
１１〜１４ 金属板
２０ 端面
３０ 部分縦断面
４０〜４７ 距離データ
５０ 矢印
５１ 内径
５２ コイル上巻部巻厚
５３ コイル下巻部巻厚
６１〜６４ 金属板
７０〜７４ 距離データ
８０ 巻緩み検出用しきい値
２００ 巻形状測定装置
２０１ 立設架構
２０２ 昇降用リニアガイドレール
２０３ レーザ距離計
２０４ フレーム
２０５ 上部スプロケット
２０６ チェーン
２０７ 下部スプロケット
２０８ サドル
２０９ モータ
２１０ チェーン緩みセンサ
２１１、２１２ ケーブルベア
２１３ クッション[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal plate coil winding shape measuring method, and more particularly to a measuring method for detecting the amount of coil loosening.
[0002]
[Prior art]
As a technique for measuring the winding shape in the coil radial direction of a metal plate coil and detecting the amount of winding looseness, Japanese Patent Application Laid-Open No. 2000-55631 discloses one end surface of a metal plate coil placed with the winding center line facing sideways. Scanning with an optical distance meter over the entire diameter in the vertical direction, based on the correspondence between the distance measured by the distance meter and the scanning position, the diameter of the hollow portion of the coil and the difference in thickness between the upper and lower winding portions And a coil winding shape measuring method for determining the collapse and winding looseness of the coil using the calculated value. FIG. 4 shows this and is a side view of the coil 10. This technique vertically scans a distance meter arranged opposite to the end face of the coil 10 and measures the distance from the distance meter to the coil end face. From the distance data and the scanning position, the coil inner diameter 51, the coil upper winding thickness 52, The coil lower winding thickness 53 is obtained, and the coil collapse (loosening amount) is obtained. That is, the winding thickness difference can be obtained from the difference between the upper winding thickness 52 and the lower winding thickness 53, and the inner diameter difference can be obtained from the difference between the coil inner diameter 51 and the command value of the coil inner diameter. When the difference in winding thickness exceeds the threshold value, it is determined that there is winding looseness, and when the inner diameter difference exceeds the threshold value, it is determined that there is crushing.
[0003]
In addition, the following techniques are known. A distance meter is scanned in the vertical direction in the coil radial direction to measure the distance to the coil end face, and the measured distance data is traced to obtain a minimum value to recognize the coil end face. The process of tracing the distance data to obtain the minimum value of the distance data is called peak trace process. The measurement value subjected to the peak trace processing is called peak trace data. A constant winding slack detection threshold value that is larger than the peak trace data is determined, and the measured distance data is compared with this winding slack detection threshold value. Judge. That is,
(Distance data)-(Volume loosening detection threshold)> 0
When is established, it is determined that the winding is loose. This technique will be described with reference to FIG. FIG. 5 is an enlarged view of the end portions of the metal plates 61, 62, 63, 64,... In the longitudinal section of the metal plate coil. Of the distance data 70 collected by a distance meter (not shown), each peak trace data 72 indicates the end face of each metal plate. Now, a winding looseness detection threshold 80 larger than the peak trace data 72 is set and compared with the distance data 70. Since the distance data 74 is larger than the threshold 80, the distance data 74 is determined as winding looseness data. At this time, for example, the measurement data 73 in the vicinity of the metal plate 61 whose end is bent is not determined as winding looseness data.
[0004]
[Problems to be solved by the invention]
In the technique disclosed in Japanese Patent Application Laid-Open No. 2000-55631, there is a problem that it is impossible to clearly distinguish whether the coil is crushed due to loose winding or other factors. On the other hand, the minimum value of the measured distance data is subjected to peak trace processing to recognize the coil end face, and a winding looseness detection threshold value is determined based on this to compare the distance data with this threshold value. If it is above, in the technique which judges that it is loose, depending on the setting of the threshold value, there is a case where even the telescope data is judged to be loose, and there is a problem that an appropriate amount of telescope cannot be detected. Further, a gap cannot be detected for a gap caused by deformation of the coil end face. FIG. 6 shows this, and reference numerals 61 to 64, 70 to 74, and 80 are the same as those in FIG. The winding looseness detection threshold 80 is set to be smaller than the maximum peak trace data 75. In this case, the distance data 75 in addition to the distance data 74 is also determined as the loosening data, and the telescope amount is calculated. The distance data 75 to be added is lost. Further, loose winding due to the bending of the end of the metal plate 61 has a problem as to whether or not the distance data 73 is properly evaluated.
[0005]
An object of the present invention is to provide a coil winding shape measuring method that solves such problems. That is, the object of the present invention is to detect a coil winding looseness using a technique of measuring a distance between a coil end surface and a distance meter by scanning a distance meter along the end surface of a metal plate coil. It is to accurately recognize the loosening of the coil, including the loosening due to the bending of the plate end, without hindering the accurate judgment of.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-described problems. The distance between the distance meter and the coil end surface is obtained by scanning the distance meter over the diameter parallel to one end surface of the metal plate coil placed at the down end. Data is collected, and these distance data are subjected to peak trace processing to recognize the coil end face, and the measured data between adjacent peak trace data and each peak trace data are compared to satisfy the following formula (1). The coil winding shape measuring method is characterized in that the measurement data to be determined is determined as winding looseness data. Here, the term “down end” refers to a posture in which the center line of the coil is placed horizontally.
[0007]
α <(Measurement data)-(Peak trace data) (1)
Here, α is a threshold value for determining a gap due to bending of the coil end face portion. In the present invention,
(A) For example, a one-dimensional laser distance meter is used as the sensor.
(B) A distance meter is arranged facing the coil end surface, and the distance meter is scanned over the diameter of the coil in parallel with the coil end surface, and the distance between the distance meter and the coil end surface is measured.
(C) After the distance measurement is completed, the distance data is subjected to peak trace processing to obtain a minimum value, and the coil end face is recognized.
(D) The amount of loosening of the winding is detected by comparing the data subjected to the peak trace processing (peak trace data) with the measured data. There are two types of winding looseness: a complete gap in which the coil layers are vacant and an incomplete gap due to the bending of the coil end face portion, and both of these winding loosenesses can be judged by the following equation (1).
[0008]
α <(Measurement data)-(Peak trace data) (1)
However, α: a threshold value for determining the gap due to the bending of the coil end face portion (e) Further, the number of winding looseness data is counted, and the amount of winding looseness is obtained from the following equation (2).
[0009]

[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a metal plate coil 10 to be measured, FIG. 2 (a) is a side view, and FIG. 2 (b) is a longitudinal sectional view showing a part thereof. A winding shape measuring device 200 is provided facing the end face 20 of the coil 10. FIG. 3 shows the appearance of the winding shape measuring apparatus 200 used in the practice of the present invention. In the winding shape measuring apparatus 200, a laser distance meter 203 is attached to a frame 204 that moves up and down along an elevating linear guide rail 202 provided on a standing frame 201. The motor 209 drives the chain 206 via the lower sprocket 207 and the upper sprocket 205 to raise and lower the frame 204. The frame 204 includes a saddle 208 that slides on the linear guide rail for ascending and descending, and moves up and down smoothly and accurately. The chain slack sensor 210 monitors the slack of the chain and maintains the lifting accuracy. The cable bears 211 and 212 hold cables for transmitting distance meter measurement data and movement data. A cushion 213 is provided at the lowermost end of the lifting stroke of the frame 204 to prevent impact.
[0011]
The winding shape measuring apparatus 200 has a height of about 5 m and can measure along the vertical diameter of a coil having an outer diameter of 1100 mm to 2400 mmφ mounted on a coil mounting saddle having a height of about 700 mm. A distance meter arranged facing the coil end face is scanned in the coil radial direction by the lifting device, and the coil winding shape is measured from the distance change between the coil radial direction distance meter and the coil end face detected by the distance meter.
[0012]
FIG. 1 is an explanatory view showing a coil winding shape measuring method according to an embodiment of the present invention, and is a partially enlarged view of a portion 30 in FIG. The metal plates 11, 12, 13, 14,... Are layered, and a distance meter is scanned over a diameter parallel to one end surface of the coil to collect distance data between the distance meter and the coil end surface. The distance data 40 measured by the distance meter is described. Among the distance data 40, the minimum value of the distance data is traced to recognize the coil end face, and peak trace data 41, 42, 43, 44 corresponding to the metal plates 11, 12, 13, 14 are obtained.
[0013]
Next, a threshold value α for determining a gap due to bending of the coil end face portion is determined. Adjacent peak trace data, for example, measurement data 45 between the peak trace data 41 and 42 of the metal plates 11 and 12 is compared with the peak trace data 41. Distance data whose difference is larger than α is recognized as loosening data. That is, the measurement data satisfying the following expression (1) is determined as the loosening data.
[0014]
α <(Measurement data) − (Peak trace data) (1)
Here, the threshold value α can be determined empirically, for example. Further, the number of winding looseness data is counted, and the amount of winding looseness is obtained from the following equation (2).
[0015]

As a result, as shown in the figure, the clearance can be accurately recognized as winding looseness due to winding looseness and bending of the coil end surface portion. The results are shown in the figure.
[0016]
【The invention's effect】
According to the present invention, it is possible to detect coil loosening using a technique of measuring the distance between the coil end face and the distance meter by scanning the distance meter along the end face of the metal plate coil. There is an excellent effect that it is possible to accurately recognize the looseness of the coil including the looseness due to the bending of the plate end without hindering accurate judgment.
[Brief description of the drawings]
FIG. 1 is a partial enlarged view of a longitudinal section of a coil in an explanatory diagram of the present invention.
2A is a side view and FIG. 2B is a longitudinal sectional view of a coil.
FIG. 3 is an overall view of a distance meter.
FIG. 4 is a side view showing collapse of a coil.
FIG. 5 is an explanatory diagram of a prior art.
FIG. 6 is an explanatory diagram of a conventional technique.
[Explanation of symbols]
10 Coil 11-14 Metal plate 20 End face 30 Partial longitudinal section 40-47 Distance data 50 Arrow 51 Inner diameter 52 Coil upper winding thickness 53 Coil lower winding thickness 61-64 Metal plate 70-74 Distance data 80 For detecting winding looseness Threshold 200 Winding shape measuring apparatus 201 Standing frame 202 Linear guide rail 203 for raising and lowering Laser distance meter 204 Frame 205 Upper sprocket 206 Chain 207 Lower sprocket 208 Saddle 209 Motor 210 Chain looseness sensors 211 and 212 Cable bear 213 Cushion

Claims (2)

A distance meter is scanned across the diameter parallel to one end face of the metal plate coil placed at the down end to collect distance data between the distance meter and the coil end face, and the distance data is subjected to peak trace processing to obtain the coil end face. And the measurement data between adjacent peak trace data and each peak trace data are compared with each other, and the measurement data satisfying the following equation (1) is determined as winding looseness data. Shape measurement method.
α <(Measurement data) − (Peak trace data) (1)
However, α: Threshold value for gap judgment by bending of coil end face part 2. The coil winding shape measuring method according to claim 1, wherein the number of winding looseness data is counted and the amount of winding looseness is obtained from the following equation (2).

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