JPH04208801A - Apparatus for detecting position of singular shape part in surface of work - Google Patents
Apparatus for detecting position of singular shape part in surface of workInfo
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- JPH04208801A JPH04208801A JP40341590A JP40341590A JPH04208801A JP H04208801 A JPH04208801 A JP H04208801A JP 40341590 A JP40341590 A JP 40341590A JP 40341590 A JP40341590 A JP 40341590A JP H04208801 A JPH04208801 A JP H04208801A
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- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
Description
［０００１１ [00011
【産業上の利用分野］本発明はワークの表面における突
起状のパリやクラックなどの形状特異部の位置を検出す
る為に用いられるワーク表面における形状特異部位置検
出装置に関する。
［０００２］
【従来の技術】図５に示すように、ワーク１ｆの表面に
沿って相対移動させて用いる為のセンサ７ｆを有し、上
記センサは磁場を形成するようにした送信部１３ｆと、
ワーク１ｆに対する相対移動の方向と平行な方向に並置
され、かつ各々は上記磁場の変化を検出して対応出力を
生ずる二つの受信部１５ｆ、 １６ ｆとを備えており
、さらに、上記二つの受信部１５ｆ、 １６ ｆからの
出力を受けて両出力の差の信号を出力するようにした比
較手段１７ｆを有している検出装置がある。
［０００３］上記装置においては、ワーク１ｆとセンサ
７ｆとが相対移動する過程においてワーク１ｆにおける
形状特異部４ｆがセンサ７ｆの傍を通っていく場合、そ
の形状特異部４ｆは一方の受信部１５ｆの傍を先に通り
他方の受信部１６ｆの傍は遅れて通る。この為比較手段
１７ｆからは図６にＡｆで示される如く上記形状特異部
の通過に対応する信号を得ることができる。従って次段
においてその信号Ａｆを基に形状特異部４ｆの位置を特
定することができる。
［０００４］上記形状特異部４ｆの位置の特定の場合、
上記信号が得られたことをその他のノイズから確実に判
別する為に、図５に示される如き比較器２６を備えさせ
て、図６の如く上記信号Ａｆがその比較器２６のしきい
値Ｖｒを超えたときに、形状特異部４ｆの検出を示す信
号Ｃｆを比較器２６から出力するようにしている。
［０００５］[Industrial Field of Application] The present invention relates to an apparatus for detecting the position of a unique shape portion on the surface of a workpiece, which is used to detect the position of a unique shape portion such as a protrusion or crack on the surface of the workpiece. [0002] [0002] As shown in FIG. 5, a sensor 7f is used by moving it relative to the surface of a workpiece 1f, and the sensor includes a transmitter 13f configured to generate a magnetic field;
It includes two receiving sections 15f and 16f that are arranged in parallel in a direction parallel to the direction of relative movement with respect to the workpiece 1f, and each detects the change in the magnetic field and generates a corresponding output, and furthermore, the two receiving sections There is a detection device that includes a comparing means 17f which receives the outputs from the sections 15f and 16f and outputs a signal representing the difference between the two outputs. [0003] In the above device, when the shape-specific portion 4f of the workpiece 1f passes by the sensor 7f in the process of relative movement between the workpiece 1f and the sensor 7f, the shape-specific portion 4f passes by the sensor 7f. It passes by the receiving section 16f first, and passes by the other receiving section 16f later. Therefore, a signal corresponding to passage through the shape-specific portion can be obtained from the comparison means 17f, as shown by Af in FIG. Therefore, in the next stage, the position of the shape-specific portion 4f can be specified based on the signal Af. [0004] In the case of specifying the position of the shape-specific portion 4f,
In order to reliably determine that the above signal has been obtained from other noises, a comparator 26 as shown in FIG. 5 is provided, and as shown in FIG. When the value exceeds , the comparator 26 outputs a signal Cf indicating the detection of the shape-specific portion 4f. [0005]
【発明が解決しようとする課題】この従来のワーク表面
における形状特異部位置検出装置では、上記形状特異部
の大きさが符号４ｆ、 ４ｆ’ で示す如く大小相違
すると上記信号も符号Ａｒ、 Ａｆ’ で示す如く大
小相違する為、上記形状特異部の検出を示す信号Ｃｆの
出る位置が符号２７で示す如く変動し、その結果形状特
異部の位置の特定の精度が低下する問題点があった。
［０００６１本願発明は上記従来技術の問題点（技術的
課題）を解決する為になされたもので、ワークにおける
形状特異部の通過に対応した差の信号を得ることができ
てその信号を基に形状特異部の位置を特定でき、しかも
その特定の場合、上記差の信号のゼロクロスの点をもっ
て形状特異部の検出を示す信号を得ることにより、形状
特異部の大きさの大小とは無関係に常に一定の位置で上
記形状特異部の検出を示す信号を得ることができて、形
状特異部の位置を正確に決めることができるようにした
ワーク表面における形状特異部位置検出装置を提供する
ことを目的としている。
［０００７］[Problems to be Solved by the Invention] In this conventional device for detecting the position of a shape-specific portion on a workpiece surface, when the size of the shape-specific portion is different as shown by the symbols 4f and 4f', the above-mentioned signals also have the symbols Ar and Af'. Because of the difference in size as shown in , the position where the signal Cf indicating the detection of the shape peculiar part is output varies as shown by reference numeral 27, resulting in a problem that the accuracy of identifying the position of the shape peculiar part is reduced. [00061 The present invention was made in order to solve the problems (technical problems) of the prior art described above, and it is possible to obtain a difference signal corresponding to the passage of a shape-specific part in a workpiece, and based on that signal. The position of the shape singular part can be identified, and in the case of identification, a signal indicating the detection of the shape singular part is obtained from the zero-crossing point of the above-mentioned difference signal. It is an object of the present invention to provide a device for detecting the position of a shape-specific part on a workpiece surface, which can obtain a signal indicating the detection of the shape-specific part at a certain position, and can accurately determine the position of the shape-specific part. It is said that [0007]
【課題を解決するための手段】上記目的を達成する為に
、本願発明におけるワーク表面における形状特異部位置
検出装置は、ワークの表面に沿って相対移動させて用い
る為のセンサを有し、上記センサは磁場を形成するよう
にした送信部と、ワークに対する相対移動の方向と平行
な方向に並置され、かつ各々は上記磁場の変化を検出し
て対応出力を生ずる二つの受信部とを備えており、さら
に、上記二つの受信部からの出力を受けて両出力の差の
信号を出力するようにした比較手段を有しているワーク
表面における形状特異部位置検出装置において、上記比
較手段からの出力信号を受けて、その信号が一旦増大し
た後ゼロクロスしたときに形状特異部の検出を示す信号
を出力するゼロ点発信手段を有するものである。
［０００８］[Means for Solving the Problems] In order to achieve the above object, the device for detecting the position of a unique shape portion on the surface of a workpiece according to the present invention has a sensor for use by relatively moving along the surface of the workpiece, The sensor includes a transmitting section configured to generate a magnetic field, and two receiving sections juxtaposed in a direction parallel to the direction of relative movement with respect to the workpiece, each detecting a change in the magnetic field and producing a corresponding output. In the apparatus for detecting the position of a shape-specific part on a workpiece surface, the apparatus further includes a comparing means configured to receive outputs from the two receiving sections and output a signal representing the difference between the two outputs. It has zero point transmitting means that receives an output signal and outputs a signal indicating detection of a shape-specific portion when the signal increases once and then crosses zero. [0008]
【作用】ワークとセンサとが相対移動する過程において
ワークにおける形状特異部がセンサの傍を通っていく場
合、その形状特異部は一方の受信部の傍を先に通り他方
の受信部の傍は遅れて通る。この為、両受骨部の出力に
は差が生ずる。比較手段はそれらの差の信号を出力する
。ゼロ点発信手段はその差の信号が一旦増大しその後ゼ
ロクロスしたときに、形状特異部を検出したことを示す
信号を出力する。
［０００９］[Operation] When a shape-specific part of the workpiece passes by the sensor in the process of relative movement between the workpiece and the sensor, the shape-specific part passes by one receiving part first and then passes by the other receiving part. Pass late. For this reason, there is a difference in the output of both bridge parts. The comparison means outputs a signal of their difference. The zero point transmitting means outputs a signal indicating that a shape peculiar part has been detected when the difference signal increases once and then crosses zero. [0009]
【実施例】以下本願の実施例を示す図面について説明す
る。形状特異部位置の検出状況を示す図３において、１
はワークで、−例としてリヤアクスルシャフトを示し、
支持用のローラ２，３により回動自在に支承されている
。４は上記ワークにおける形状特異部で、−例として上
記リヤアクスルシャフト１を鍛造手段によって製造する
場合に生じたパリを示し、ワーク１の軸本体１ａにおけ
る端部からフランジ１ｂの裏面の範囲において生じてい
る。５はローラ３を回転駆動する為のモータである。６
は形状特異部位置検出装置で、ワーク１に近接して配置
されるセンサ７とそれに接続した検出回路８から成る。
ワーク１の表面における形状特異部４の高さは例えば４
〜５ｍｍであり、センサ７はワーク１の回動中において
形状特異部４がセンサ７に衝突しない範囲でワーク１の
表面に近づけて配置される。検出回路８はセンサ７の近
くにあっても遠くにあってもよい。
［００１０１このような構成の形状特異部位置検出装置
にあっては、ワーク１が支持用のローラ２，３上に置か
れ、モータ５の回動によりそのワーク１が例えば３秒で
１回転程度の速度で回動する。ワーク１の回動によるワ
ーク１とセンサ７との相対移動の過程において、形状特
異部４がセンサ７の傍を通るとセンサ７はその通過に対
応する信号を出力し、検出回路８はその信号を受けて形
状特異部４を検出したことを示す検出信号を出力する。
その検出信号はデイスプレィあるいはプリンタに与えら
れ、検出された形状特異部４の位置が表記される。ある
いは、上記検出信号は上記モータ５を停止させる為の停
止信号としてモータ５の制御回路に与えられ、モータ５
が停止される。そして予め準備されている回転磁石が回
動されて、上記位置の検出された形状特異部４の研削が
行なわれる。
［００１１１次に上記形状特異部４及び形状特異部位置
検出装置６を詳細に示す図１について説明する。面図１
においてワーク１とセンサ７との相対移動の方向は左右
方向として示しである。センサ７について説明する。１
１はケースで、その外径寸法は例えば１６φ程度である
。より小さい５φ程度のものもある。１３は上記ケース
１１内の中央部に備えられた送信部で、ケース１１内に
備えられた三つの腕部を有するコア１２における中央の
腕部をもって構成されており、ワーク１に向けて磁場を
与え得るよう送信コイル１４が巻回しである。１５．１
６は上記磁場の変化を検出して対応出力を生ずる第１及
び第２の二つの受信部で、ワーク１に対する相対移動の
方向と平行な方向に並置されている。本例では上記コア
１２の両側の腕部が上記相対移動の方向と平行になるよ
うに配置され、それらの腕部をもって上記受信部１５．
１６が構成されている。１７は比較手段で、上記二つの
受信部１５．１６からの出力を受けて両出力の差の信号
を出力するようにしたものである。本例では上記両受信
部１５．１６に夫々受信コイル１８゜１９を巻き、それ
らのコイル１８，１９をセンサ７のケース１１内におい
て差動的に接続して構成しである。上記両受信コイル１
８．１９のリード線をそのまま前記検出回路８に導き、
そこで差動的な接続を行なったり、検出回路８において
差の演算を行なう演算回路を備えさせ、その演算回路に
おいて差の信号を得るようにしてもよい。あるいは、セ
ンサ７において両受信部１５．１６に一つのコイルを「
８の字」状に巻きそのコイル自身に二つの受信部１５，
１６の出力の差の信号が得られるようにしてもよい。尚
、２１は発振器で、送信コイル１４を励磁する為の数１
０ＫＨｚの交流信号を発信するものである。
［００１２］次に検出回路８において、２２はゼロ点発
信手段で、上記比較手段１７からの出力信号を受けて、
その信号が一旦増大した後ゼロクロスしたときに形状特
異部い値と同量のヒステリシスを持たせである比較器２
３と、比較器２３からの出力をパルス化するパルス化回
路２４（例えば単安定マルチ）をもって構成しである。
［００１３］上記形状特異部位置検出装置６の動作を図
２に基づき説明する。ワーク１とセンサ７との相対移動
により形状特異部４はセンサ７に対し例えば図１の右方
から左方へ向けて移動する。その移動過程において、送
信部１３によって形成されている磁場は上記形状特異部
４の通過によって変化を受ける。この場合、形状特異部
４は先に第１の受信部１５の傍を通る為、その第１の受
信部１５で検出される磁場が先に大きく変化し、次に形
状特異部４はそこを通り過ぎた後筒２の受信部１６の傍
を通る為、第２の受信部１６で検出される磁場は遅れて
大きく変化する。このような磁場の変化により、第１の
受信部１５の対応出力即ち磁束数が先に変化し、第２の
受信部１６の対応出力即ち磁束数が遅れて変化する。す
ると比較手段１７からは図２における■に符号Ａで示さ
れる如きそれらの差の信号が出力される。上記差の信号
Ａは比較器２３に入力される。比較器２３においては、
上記差の信号Ａのレベルが増大してそれが比較器２３の
しきい値電圧Ｖｒとヒステリシスとを加えたレベルを超
えると、図２における■の如く比較器２３の出力Ｂはそ
れまでのＨレベルがＬレベルに変化する。尚しきい値電
圧とヒステリシスとを加えたレベルは、検出すべき最小
の形状特異部４に対応した値に設定しておくと良い。次
に上記差の信号Ａのレベルが減少して上記しきい値電圧
Ｖｒからヒステリシスを差引いたレベルとなると、即ち
ゼロクロスする点Ｐとなると、比較器２３の出力は再び
Ｈレベルに変わる。比較器２３の出力がＨレベルに変化
することにより、パルス化回路２４は図２における■の
如く予め設定した時間幅Ｔのパルス信号Ｃを形状特異部
４が検出されたことを示す検出信号として出力する。尚
検出信号の時間幅Ｔはその信号を受ける次段の要求に応
じて適切に定めるのがよい。また差の信号Ａのレベルが
増大し始めてからゼロクロスする点までの時間Ｔ１は例
えば４０ミリ秒である。
［００１４］上記のような動作の場合、形状特異部４の
大きさ例えばパリの場合はその幅あるいは高さにより、
前記第１及び第２の受信部１５．１６の対応出力は夫々
同様に大小変化する。従って前記差の信号Ａは正の側Ａ
′と負の側ＡＣＴとが同様に変化する。この為上記形状
特異部４の大きさの違いにより上記差の信号が符号ａで
示す如く例えばレベルが低くなっても、前記ゼロクロス
の位置は何ら変化しない。従って上記形状特異部位置検
出装置６にあっては、形状特異部４の大きさの大小とは
何ら関係なく、その形状特異部４がセンサ７に対し一定
の位置、例えば二つの受信部１５．１６及びそれらに巻
回したコイル１８．１９が同一の場合、両受信部１５．
１６の丁度中間の位置に来たときに、前述の如き形状特
異部４の検出信号を得ることができる。
［００１５］次に図４は前記比較器２３の動作を説明す
る為の図である。図において、Ｄは比較器２３の動作特
性であり、ＶＨは高側しきい値（前記しきい値にヒステ
リシスを加えたもの）、ＶＬは低側しきい値（前記しき
い値からヒステリシスを差引いたもの即ち０レベル）で
ある。
［００１６］このような動作特性の比較器２３に信号Ａ
が入力されると、図において対応を示す矢印から明らか
なように信号Ｂが出力される。
［００１７］次に上記ゼロ点発信手段２２は、上記のよ
うな構成に代えて、Ａ／Ｄ変換としきい値上ヒステリシ
スのアルゴリズムで処理するコンピュータを用いること
も可能である。
［００１８］Embodiments The drawings showing embodiments of the present application will be described below. In FIG. 3 showing the detection status of the position of the shape singular part, 1
is a workpiece, - shows a rear axle shaft as an example,
It is rotatably supported by supporting rollers 2 and 3. Reference numeral 4 denotes a shape-specific part in the workpiece, and shows, for example, a breakage that occurs when the rear axle shaft 1 is manufactured by forging, and occurs in the range from the end of the shaft body 1a of the workpiece 1 to the back surface of the flange 1b. There is. 5 is a motor for rotationally driving the roller 3. 6
1 is a shape peculiar part position detecting device, which is composed of a sensor 7 placed close to the workpiece 1 and a detection circuit 8 connected to the sensor 7. The height of the unique shape portion 4 on the surface of the workpiece 1 is, for example, 4
~5 mm, and the sensor 7 is placed close to the surface of the work 1 within a range where the unique shape portion 4 does not collide with the sensor 7 while the work 1 is rotating. The detection circuit 8 may be located near or far from the sensor 7. [00101 In the shape peculiar part position detection device having such a configuration, the workpiece 1 is placed on the supporting rollers 2 and 3, and the workpiece 1 rotates about once every 3 seconds due to the rotation of the motor 5. rotates at a speed of In the process of relative movement between the workpiece 1 and the sensor 7 due to the rotation of the workpiece 1, when the shape-specific portion 4 passes by the sensor 7, the sensor 7 outputs a signal corresponding to the passage, and the detection circuit 8 receives the signal. In response to this, a detection signal indicating that the shape-specific portion 4 has been detected is output. The detection signal is given to a display or a printer, and the position of the detected shape-specific portion 4 is written thereon. Alternatively, the detection signal is given to the control circuit of the motor 5 as a stop signal for stopping the motor 5,
will be stopped. Then, a rotating magnet prepared in advance is rotated, and the shape-specific portion 4 whose position has been detected is ground. [00111] Next, FIG. 1, which shows the above-mentioned shape peculiar part 4 and shape peculiar part position detection device 6 in detail, will be explained. Plan 1
In the figure, the direction of relative movement between the workpiece 1 and the sensor 7 is shown as the left-right direction. The sensor 7 will be explained. 1
Reference numeral 1 denotes a case, the outer diameter of which is, for example, about 16φ. There are also smaller ones of about 5φ. Reference numeral 13 denotes a transmitting unit provided in the center of the case 11, which is composed of the central arm of the core 12 provided in the case 11 and having three arms, and transmits a magnetic field toward the workpiece 1. The transmitting coil 14 is wound so as to give 15.1
Reference numeral 6 denotes two receiving sections, a first and a second receiving section, which detect changes in the magnetic field and generate corresponding outputs, and are juxtaposed in a direction parallel to the direction of relative movement with respect to the workpiece 1. In this example, the arm portions on both sides of the core 12 are arranged parallel to the direction of the relative movement, and the receiving portion 15.
16 are configured. Reference numeral 17 denotes a comparison means which receives the outputs from the two receiving sections 15 and 16 and outputs a signal representing the difference between the two outputs. In this example, receiving coils 18 and 19 are wound around each of the receiving sections 15 and 16, and these coils 18 and 19 are differentially connected within the case 11 of the sensor 7. Both receiving coils 1 above
8. Lead the lead wire of 19 directly to the detection circuit 8,
Therefore, a differential connection may be made, or an arithmetic circuit for calculating the difference may be provided in the detection circuit 8, and the difference signal may be obtained in the arithmetic circuit. Alternatively, in the sensor 7, one coil is connected to both receivers 15 and 16.
The coil itself is wound in a figure 8 shape and has two receiving sections 15,
A signal having a difference between 16 outputs may be obtained. In addition, 21 is an oscillator, and the number 1 is used to excite the transmitting coil 14.
It transmits a 0KHz AC signal. [0012] Next, in the detection circuit 8, 22 is a zero point transmitting means, which receives the output signal from the comparing means 17,
Comparator 2 has the same amount of hysteresis as the value of the shape singular part when the signal increases once and then crosses zero.
3, and a pulsing circuit 24 (for example, a monostable multi-channel) for pulsing the output from the comparator 23. [0013] The operation of the shape-specific portion position detection device 6 will be explained based on FIG. 2. Due to the relative movement between the workpiece 1 and the sensor 7, the unique shape portion 4 moves relative to the sensor 7, for example, from the right to the left in FIG. During the movement process, the magnetic field formed by the transmitting section 13 is changed by passing through the shape-specific section 4. In this case, since the shape-specific part 4 passes by the first receiving part 15 first, the magnetic field detected by the first receiving part 15 changes greatly first, and then the shape-specific part 4 passes by the first receiving part 15. Since it passes by the receiving section 16 of the rear cylinder 2, the magnetic field detected by the second receiving section 16 is delayed and changes significantly. Due to such a change in the magnetic field, the corresponding output of the first receiving section 15, that is, the number of magnetic fluxes changes first, and the corresponding output, that is, the number of magnetic fluxes of the second receiving section 16 changes later. Then, the comparison means 17 outputs a signal representing the difference between them, as shown by the symbol A in the square square in FIG. The difference signal A is input to the comparator 23. In the comparator 23,
When the level of the difference signal A increases and exceeds the level of the sum of the threshold voltage Vr of the comparator 23 and the hysteresis, the output B of the comparator 23 becomes higher than the previous level, as shown by ■ in FIG. The level changes to L level. Note that the level of the threshold voltage plus the hysteresis is preferably set to a value corresponding to the minimum shape singular portion 4 to be detected. Next, when the level of the difference signal A decreases to a level obtained by subtracting the hysteresis from the threshold voltage Vr, that is, when it reaches the zero-crossing point P, the output of the comparator 23 changes to H level again. When the output of the comparator 23 changes to H level, the pulse generator 24 generates a pulse signal C with a preset time width T as shown in (■) in FIG. 2 as a detection signal indicating that the shape peculiar part 4 has been detected. Output. The time width T of the detection signal is preferably determined appropriately depending on the requirements of the next stage that receives the signal. Further, the time T1 from when the level of the difference signal A starts to increase until it crosses zero is, for example, 40 milliseconds. [0014] In the case of the above-mentioned operation, depending on the size of the unique shape portion 4, for example, in the case of Paris, its width or height,
The corresponding outputs of the first and second receivers 15, 16 vary in magnitude in the same way. Therefore, the difference signal A is on the positive side A
' and the negative side ACT change similarly. Therefore, even if the level of the difference signal becomes low as indicated by symbol a due to the difference in the size of the shape-specific portion 4, the position of the zero cross does not change at all. Therefore, in the shape peculiar part position detecting device 6, regardless of the size of the shape peculiar part 4, the shape peculiar part 4 is located at a fixed position with respect to the sensor 7, for example, the two receiving parts 15. 16 and the coils 18 and 19 wound around them are the same, both receivers 15.
16, the detection signal of the shape-specific portion 4 as described above can be obtained. [0015] Next, FIG. 4 is a diagram for explaining the operation of the comparator 23. In the figure, D is the operating characteristic of the comparator 23, VH is the high threshold (hysteresis added to the threshold), and VL is the low threshold (hysteresis is subtracted from the threshold). (i.e. 0 level). [0016] The signal A is input to the comparator 23 having such operating characteristics.
When is input, signal B is output as is clear from the arrows indicating the correspondence in the figure. [0017] Next, instead of the above configuration, the zero point transmitting means 22 may use a computer that performs processing using an algorithm of A/D conversion and supra-threshold hysteresis. [0018]
【発明の効果】以上のように本願発明にあっては、ワー
ク１に対しセンサ７が相対移動する過程において、ワー
ク１における形状特異部４がセンサ７の傍を通る場合、
比較手段１７から形状特異部４の通過に対応する信号Ａ
を得ることができ、その信号Ａを基に形状特異部４の存
在を知ることのできる効果があるは勿論のこと、［００
１９］上記信号Ａを用いて上記形状特異部４の存在を知
ると共にその位置を特定する場合、形状特異部４の大き
さの大小に対応する上記の信号Ａの大、小の変動は正の
側Ａ′と負の側Ａｌｌとで同様に生ずるから、ゼロ点発
信手段２２によって判別するゼロクロスの位置は、上記
信号Ａの大小の変動とは無関係にその場所が一定する特
長がある。このことは、上記形状特異部４の位置をその
大きさの大小とは関係なく正確に特定できる利点がある
。As described above, in the present invention, when the unique shape portion 4 of the workpiece 1 passes by the sensor 7 during the process in which the sensor 7 moves relative to the workpiece 1,
Signal A corresponding to passage through the shape-specific portion 4 from the comparing means 17
It goes without saying that the presence of the shape-specific portion 4 can be known based on the signal A, and also that [00
19] When using the above signal A to know the existence of the above-mentioned shape peculiar part 4 and to specify its position, the fluctuation in the magnitude of the above signal A corresponding to the size of the above-mentioned shape peculiar part 4 is positive. Since this occurs in the same way on the side A' and the negative side All, the zero cross position determined by the zero point transmitting means 22 has the advantage that it remains constant regardless of the fluctuation in the magnitude of the signal A. This has the advantage that the position of the shape-specific portion 4 can be accurately specified regardless of its size.
【図１】ワークと形状特異部位置検出装置との関係及び
形状特異部位置検出装置の回路構成を示す図。FIG. 1 is a diagram showing the relationship between a workpiece and a unique shape part position detection device and the circuit configuration of the unique shape part position detection device.
【図２】形状特異部位置検出装置の動作説明用波形図。FIG. 2 is a waveform diagram for explaining the operation of the shape singular part position detection device.
【図３】ワークにおける形状特異部位置の検出状態を示
す図。FIG. 3 is a diagram showing the state of detection of the position of a unique shape part in a workpiece.
【図４】比較器の動作説明図。FIG. 4 is an explanatory diagram of the operation of the comparator.
【図５】従来の形状特異部位置検出装置を示す図１と同
様の図。FIG. 5 is a diagram similar to FIG. 1 showing a conventional shape-specific part position detection device.
【図６】従来の形状特異部位置検出装置の動作説明用波
形図。FIG. 6 is a waveform diagram for explaining the operation of a conventional shape-specific part position detection device.
１ ワーク ４ 形状特異部 ７ センサ １３ 送信部 １５、１６ 受信部 １７ 比較手段 ２２ ゼロ点発信手段 1 Work 4 Shape singular part 7 Sensor 13 Transmission section 15, 16 Receiving section 17 Comparison means 22 Zero point transmission means
【図４】[Figure 4]
Claims (1)
る為のセンサを有し、上記センサは磁場を形成するよう
にした送信部と、ワークに対する相対移動の方向と平行
な方向に並置され、かつ各々は上記磁場の変化を検出し
て対応出力を生ずる二つの受信部とを備えており、さら
に、上記二つの受信部からの出力を受けて両出力の差の
信号を出力するようにした比較手段を有しているワーク
表面における形状特異部位置検出装置において、上記比
較手段からの出力信号を受けて、その信号が一旦増大し
た後ゼロクロスしたときに形状特異部の検出を示す信号
を出力するゼロ点発信手段を有することを特徴とするワ
ーク表面における形状特異部位置検出装置。Claim 1: A sensor for use in relative movement along the surface of a workpiece, the sensor being juxtaposed with a transmitter configured to generate a magnetic field in a direction parallel to the direction of relative movement with respect to the workpiece. , and each of the receivers includes two receivers that detect changes in the magnetic field and generate corresponding outputs, and is further configured to receive outputs from the two receivers and output a signal representing the difference between the two outputs. In a device for detecting the position of a shape-specific part on a workpiece surface, which has a comparing means, a signal indicating the detection of a shape-specific part is detected when the signal increases once and then crosses zero. A device for detecting the position of a shape-specific part on a workpiece surface, characterized by having a zero point transmitting means for outputting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40341590A JPH04208801A (en) | 1990-12-01 | 1990-12-01 | Apparatus for detecting position of singular shape part in surface of work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40341590A JPH04208801A (en) | 1990-12-01 | 1990-12-01 | Apparatus for detecting position of singular shape part in surface of work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04208801A true JPH04208801A (en) | 1992-07-30 |
Family
ID=18513151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40341590A Pending JPH04208801A (en) | 1990-12-01 | 1990-12-01 | Apparatus for detecting position of singular shape part in surface of work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04208801A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2020158677A1 (en) * | 2019-01-31 | 2021-11-11 | 株式会社メトロール | Position detector |
-
1990
- 1990-12-01 JP JP40341590A patent/JPH04208801A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2020158677A1 (en) * | 2019-01-31 | 2021-11-11 | 株式会社メトロール | Position detector |
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