JP2009216489A - Photosensor device and workpiece position detecting method using the same - Google Patents

Photosensor device and workpiece position detecting method using the same Download PDF

Info

Publication number
JP2009216489A
JP2009216489A JP2008059283A JP2008059283A JP2009216489A JP 2009216489 A JP2009216489 A JP 2009216489A JP 2008059283 A JP2008059283 A JP 2008059283A JP 2008059283 A JP2008059283 A JP 2008059283A JP 2009216489 A JP2009216489 A JP 2009216489A
Authority
JP
Japan
Prior art keywords
light
optical fiber
fiber unit
workpiece
light receiving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2008059283A
Other languages
Japanese (ja)
Inventor
Hisatane Matsuno
久種 松野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Azbil Corp
Original Assignee
Azbil Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Azbil Corp filed Critical Azbil Corp
Priority to JP2008059283A priority Critical patent/JP2009216489A/en
Publication of JP2009216489A publication Critical patent/JP2009216489A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photosensor device for precisely stopping a conveyed workpiece at a prescribed position in a short time and materializing a reduction in position detecting costs and the enhancement of work efficiency. <P>SOLUTION: This photosensor device includes a light-projecting-side optical fiber unit 10A for projecting light in a direction that crosses a belt conveyor B from one lateral edge side thereof, a light-receiving-side optical fiber unit 10B for receiving light from the fiber unit 10A on the other lateral edge side of the belt conveyor B, and a photoelectric sensor 13 connected to optical fiber 12 of the fiber unit 10B. The two fiber units 10A and 10B are equipped with light projecting and receiving surfaces 10a and 10b respectively, following the moving direction of a printed board P. The optical fiber unit has the property of causing the amount of light received by the receiving surface 10b to monotonously decrease as the printed board P goes between the two surfaces 10a and 10b. The photoelectric sensor 13 outputs a detection signal in two positions P1 and P2 determined by setting two different thresholds S1 and S2 within a property domain A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ベルトコンベア等のワーク搬送路の近傍に配置されて、この搬送路上を移動するワークの位置検出を行うのに用いられる光センサ装置及びこれを用いたワークの位置検出方法に関するものである。   The present invention relates to an optical sensor device that is arranged in the vicinity of a work conveyance path such as a belt conveyor and used to detect the position of a work moving on the conveyance path, and a work position detection method using the same. is there.

上記した光センサ装置としては、例えば、光ファイバを介して光源側に接続して、ベルトコンベアの一方の側縁からこのベルトコンベアを横切る方向に投光する投光側光ファイバユニットと、光電センサに接続して、ベルトコンベアの他方の側縁で投光側光ファイバユニットから投光された光を受ける受光側光ファイバユニットを備えたものが知られており、この光センサ装置では、ベルトコンベアで搬送されるワークが、光側光ファイバユニットから投光された光を遮ることで、その位置検出が成されるようになっている(例えば、特許文献1参照)。   As the above-described optical sensor device, for example, a light-projecting side optical fiber unit that is connected to the light source side through an optical fiber and projects light in a direction crossing the belt conveyor from one side edge of the belt conveyor, and a photoelectric sensor And a light receiving side optical fiber unit that receives light projected from the light projecting side optical fiber unit at the other side edge of the belt conveyor. The position of the work transported by (1) is blocked by blocking the light projected from the light-side optical fiber unit (see, for example, Patent Document 1).

上記したベルトコンベアで搬送されるワークを所定位置に正確に停止させるには、所定位置の手前でワークを大きく減速させる必要があり、従来において、上記光センサ装置を二組用意し、一方の光センサ装置を所定の停止位置に配置すると共に、他方の光センサ装置をワークの減速開始位置に並べて配置するようにしていた。
特開2004-205361号公報
In order to accurately stop the work conveyed by the belt conveyor at a predetermined position, it is necessary to greatly decelerate the work before the predetermined position. Conventionally, two sets of the above-described photosensor devices are prepared, The sensor device is arranged at a predetermined stop position, and the other optical sensor device is arranged side by side at the deceleration start position of the workpiece.
JP 2004-205361 A

ところが、従来において、ワークの搬送時間の短縮を図るためには、減速を開始してから停止するまでの区間を短くすること、又は停止位置の精度を上げるために停止動作から実際に停止するまでの区間を短くすること、すなわち、二組の光センサ装置の互いの間隔を狭めることが要求されるが、光センサ装置の各投光部分の大きさをできる限り小さくしたとしても限界がある。   However, in the past, in order to shorten the work transfer time, the interval from the start of deceleration to the stop is shortened, or the stop operation is actually stopped to increase the accuracy of the stop position. However, there is a limit even if the size of each light projection portion of the optical sensor device is made as small as possible.

また、ワークの停止位置を変える場合には、二組の光センサ装置の相対位置関係を変更する必要があり、その作業が煩雑で且つ容易でないという問題を有しており、これらの問題を解決することが従来の課題となっていた。
本発明は、上記した従来の課題に着目してなされたもので、搬送されるワークを短時間でしかも正確に所定位置に停止させることができるのは勿論のこと、ワークの位置検出に係るコストの低減及び作業性の向上を実現することが可能である光センサ装置及びこれを用いたワークの位置検出方法を提供することを目的としている。
In addition, when changing the stop position of the workpiece, it is necessary to change the relative positional relationship between the two sets of optical sensor devices, which has the problem that the work is complicated and not easy. This has been a conventional problem.
The present invention has been made paying attention to the above-described conventional problems, and it is possible to stop the conveyed work at a predetermined position in a short time and of course, as well as the cost for detecting the position of the work. It is an object of the present invention to provide an optical sensor device capable of realizing a reduction in workability and an improvement in workability, and a workpiece position detection method using the same.

上述した目的を達成するべく本発明の請求項1に係る発明は、ベルトコンベアなどのワーク搬送路上を移動するワークの位置検出を行う光センサ装置であって、前記ワーク搬送路の一方の側縁がわに位置して該ワーク搬送路を横切る方向に投光する投光側光ファイバユニットと、前記ワーク搬送路の他方の側縁がわに位置して前記投光側光ファイバユニットから投光された光を受ける受光側光ファイバユニットと、この受光側光ファイバユニットの光ファイバと接続する光電センサを備え、前記投光側光ファイバユニット及び受光側光ファイバユニットは、前記ワークの移動方向に沿う投光面及び受光面をそれぞれ具備して、両面間にワークが進入するのに伴って前記受光側光ファイバユニットにおける受光面の受光量が単調に減衰する特性を有し、前記光電センサは、受光量が急変する特性領域(図2の特性領域A参照)を有し、二つの異なった前記受光量に対応した閾値を前記特性領域内に設定して定まる二つの位置(図2の閾値S1,S2及びこれで定まる二つの位置P1,P2参照)でワーク検出信号を出力する構成としたことを特徴としており、このような構成の光センサ装置を前述した課題を解決するための手段としている。   In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is an optical sensor device for detecting the position of a workpiece moving on a workpiece conveyance path such as a belt conveyor, and one side edge of the workpiece conveyance path. A light projecting side optical fiber unit that projects light in a direction crossing the work transport path and a side edge of the work transport path is located on a side and projects light from the light projecting side optical fiber unit. A light receiving side optical fiber unit that receives the emitted light, and a photoelectric sensor connected to the optical fiber of the light receiving side optical fiber unit, wherein the light projecting side optical fiber unit and the light receiving side optical fiber unit are arranged in the moving direction of the workpiece. The light receiving surface of the light receiving surface of the light receiving side optical fiber unit monotonously attenuates as the work enters between both surfaces. The photoelectric sensor has a characteristic region (see characteristic region A in FIG. 2) in which the amount of received light changes suddenly, and is determined by setting thresholds corresponding to two different amounts of received light in the characteristic region. The present invention is characterized in that a workpiece detection signal is output at two positions (see threshold values S1 and S2 in FIG. 2 and two positions P1 and P2 determined thereby). As a means to solve the problem.

本発明に係る光センサ装置では、ワーク搬送路上を移動するワークの位置検出を行うに際して、投光側光ファイバユニットの投光面及び受光側光ファイバユニットの受光面間にワークが進入すると、これに伴って受光側光ファイバユニットにおける受光面の受光量が単調に減衰し始める。
この際、投光側光ファイバユニットの投光面及び受光側光ファイバユニットの受光面間には、光電センサの特性領域(A)内に二つの異なった受光量に対応する閾値(S1,S2)を設定することによって、ワーク検出信号を出力可能なワークの減速開始位置(P1)及びワークの所定停止位置(P2)が定めてあるので、ワークの進行に伴って減衰する受光量に基づいて光電センサがワークの減速開始位置(P1)への到達を識別すると、ワーク検出信号が出力されてワークの減速が開始することとなり、続いて、ワークのさらなる進行に伴って減衰する受光量に基づいて光電センサがワークの所定停止位置(P2)への到達を識別すると、上記と同じくワーク検出信号が出力されてワークが所定位置(P2)に停止することとなる。
In the optical sensor device according to the present invention, when detecting the position of the workpiece moving on the workpiece conveyance path, if the workpiece enters between the light projecting surface of the light projecting side optical fiber unit and the light receiving surface of the light receiving side optical fiber unit, Accordingly, the amount of light received by the light receiving surface of the light receiving side optical fiber unit begins to attenuate monotonously.
At this time, thresholds (S1, S2) corresponding to two different amounts of received light in the characteristic area (A) of the photoelectric sensor between the light projecting surface of the light projecting side optical fiber unit and the light receiving surface of the light receiving side optical fiber unit. ) Is set, the workpiece deceleration start position (P1) and workpiece predetermined stop position (P2) at which the workpiece detection signal can be output are determined, so that the amount of light received attenuates as the workpiece advances. When the photoelectric sensor recognizes the arrival of the workpiece at the deceleration start position (P1), the workpiece detection signal is output to start the deceleration of the workpiece, and then, based on the amount of received light that attenuates as the workpiece further progresses. When the photoelectric sensor identifies the arrival of the workpiece at the predetermined stop position (P2), the workpiece detection signal is output as described above, and the workpiece stops at the predetermined position (P2).

このように、ワークの減速開始位置(P1)及びワークの所定停止位置(P2)は、光電センサの特性領域(A)内に設定された二つの異なった受光量に対応した閾値(S1,S2)により定められているので、ワークの減速開始位置及びワークの所定停止位置に二組の光センサ装置を並べて配置した従来と比べて、両位置の間隔を狭く設定し得ることとなり、加えて、アンプ操作や後述するスリットの設置といった安価で且つ簡単な操作によってワークの停止位置の変更にも対応し得ることとなる。   As described above, the deceleration start position (P1) of the workpiece and the predetermined stop position (P2) of the workpiece are the threshold values (S1, S2) corresponding to the two different received light amounts set in the characteristic area (A) of the photoelectric sensor. ), The distance between the two positions can be set narrower than in the prior art in which two sets of optical sensor devices are arranged side by side at the workpiece deceleration start position and the workpiece predetermined stop position. Changing the stop position of the workpiece can be dealt with by an inexpensive and simple operation such as an amplifier operation or a slit installation described later.

なお、ワークの減速開始位置(P1)及びワークの所定停止位置(P2)は、ワークの所定停止位置(P1)及びワークの停止はみ出し位置(P2)とそれぞれ置き換えることができ、このように成すことで、本出願人が先に出願した特願2007-287945号における請求項1に記載した第一の検出スイッチ及び第二の検出スイッチを本発明の光センサ装置一つで代替することが可能となる。   The workpiece deceleration start position (P1) and the workpiece predetermined stop position (P2) can be replaced with the workpiece predetermined stop position (P1) and the workpiece stop protruding position (P2), respectively. Thus, the first detection switch and the second detection switch described in claim 1 in Japanese Patent Application No. 2007-287945 filed earlier by the present applicant can be replaced with one photosensor device of the present invention. Become.

また、本発明の請求項2に係る光センサ装置は、異なるワーク毎に閾値を設定して記憶し、外部信号によりワークが指定された段階で該当するワークの閾値を自動選択する制御部を設けた構成としており、このような構成とすることで、段取り換えの自動化が図られることとなる。
ここで、本発明に係る光センサ装置において、ワークの減速開始位置(P1)及びワークの所定停止位置(P2)の設定変更は、アンプ操作による閾値の変更で対応可能であるが、例えば、ワークの減速開始位置(P1)及びワークの所定停止位置(P2)の間隔をより狭めたい場合には、光電センサの特性領域(A)の一部を使用してアンプ操作により閾値(S1,S2)の間隔を狭めるようにしてもよいが、この場合には、SN比が低下することがある。
In addition, the optical sensor device according to claim 2 of the present invention includes a control unit that sets and stores a threshold value for each different workpiece, and automatically selects the threshold value of the corresponding workpiece when the workpiece is designated by an external signal. By adopting such a configuration, the setup change can be automated.
Here, in the optical sensor device according to the present invention, the setting change of the workpiece deceleration start position (P1) and the workpiece predetermined stop position (P2) can be handled by changing the threshold value by an amplifier operation. When the distance between the deceleration start position (P1) and the predetermined stop position (P2) of the workpiece is to be narrowed, a threshold value (S1, S2) is obtained by an amplifier operation using a part of the characteristic area (A) of the photoelectric sensor. However, in this case, the S / N ratio may decrease.

そこで、本発明の請求項3に係る光センサ装置では、前記投光側光ファイバユニットの投光面及び受光側光ファイバユニットの受光面に、二つの異なった前記受光量に対応した閾値の間隔を調整する光芒幅調整用スリットを設けた構成としており、このような構成を採用すると、二つの閾値間の受光量変化が急峻なものとなって、SN比の低下を回避し得ることとなる。   Therefore, in the optical sensor device according to claim 3 of the present invention, the threshold interval corresponding to the two different received light amounts on the light emitting surface of the light projecting side optical fiber unit and the light receiving surface of the light receiving side optical fiber unit. In this configuration, the change in the amount of received light between the two threshold values becomes steep, and a decrease in the S / N ratio can be avoided. .

さらに、本発明に係る光センサ装置において、アンプ操作により二つの閾値を設定し、これらの閾値間にワークがあるときに、ワーク検出信号を出力させる構成としてもよい。
一方、本発明の請求項4に係る光センサ装置を用いたワークの位置検出方法は、ワーク搬送路の一方の側縁がわに位置して該ワーク搬送路を横切る方向に投光する投光側光ファイバユニットと、前記ワーク搬送路の他方の側縁がわに位置して前記投光側光ファイバユニットから投光された光を受ける受光側光ファイバユニットと、この受光側光ファイバユニットの光ファイバと接続する光電センサを備えた光センサ装置を用いて、前記ワーク搬送路上を移動するワークの位置検出を行うに際して、前記投光側光ファイバユニット及び受光側光ファイバユニットには、前記ワークの移動方向に沿う投光面及び受光面をそれぞれ具備して、両面間にワークが進入するのに伴って前記受光側光ファイバユニットにおける受光面の受光量が単調に減衰する特性を有する光ファイバユニットを用い、前記光電センサには、受光量が急変する特性領域(図2の特性領域A参照)を有する光電センサを使用して、二つの異なった前記受光量に対応した閾値を前記特性領域内に設定して定まる二つの位置(図2の閾値S1,S2及びこれで定まる二つの位置P1,P2参照)でワーク検出信号を出力させる構成としている。
Furthermore, in the optical sensor device according to the present invention, two threshold values may be set by an amplifier operation, and a workpiece detection signal may be output when there is a workpiece between these threshold values.
On the other hand, in the workpiece position detection method using the optical sensor device according to claim 4 of the present invention, the light is projected in a direction crossing the workpiece conveyance path with one side edge of the workpiece conveyance path located on the side. A side optical fiber unit, a light receiving side optical fiber unit that receives the light projected from the light projecting side optical fiber unit with the other side edge of the work transport path located at the side, and When detecting the position of a workpiece moving on the workpiece conveyance path using an optical sensor device including a photoelectric sensor connected to an optical fiber, the light projecting side optical fiber unit and the light receiving side optical fiber unit include the workpiece. The light receiving surface of the light receiving surface of the light receiving side optical fiber unit is monotonously attenuated as the work enters between both surfaces. An optical fiber unit having the characteristics described above is used, and the photoelectric sensor has a characteristic region (see characteristic region A in FIG. 2) in which the amount of received light changes abruptly. The workpiece detection signal is output at two positions determined by setting the threshold value in the characteristic area (see threshold values S1 and S2 in FIG. 2 and two positions P1 and P2 determined thereby).

このような構成を成す光センサ装置を用いたワークの位置検出方法において、ワークの減速開始位置(P1)及びワークの所定停止位置(P2)は、光電センサの特性領域(A)内に設定された二つの異なった受光量に対応した閾値(S1,S2)により定められているので、ワークの減速開始位置及びワークの所定停止位置に二組の光センサ装置を並べて配置した従来のワークの位置検出方法と比較して、ワークの減速開始位置及びワークの所定停止位置の間隔を狭く設定し得ることとなるうえ、アンプ操作といった安価で且つ簡単な操作によってワークの停止位置の変更にも対応し得ることとなる。   In the workpiece position detection method using the optical sensor device having such a configuration, the workpiece deceleration start position (P1) and the workpiece predetermined stop position (P2) are set in the characteristic region (A) of the photoelectric sensor. The position of the conventional workpiece in which two sets of optical sensor devices are arranged side by side at the deceleration start position of the workpiece and the predetermined stop position of the workpiece is determined by the threshold values (S1, S2) corresponding to the two different received light amounts. Compared to the detection method, the interval between the workpiece deceleration start position and the workpiece predetermined stop position can be set narrower, and the workpiece stop position can be changed by an inexpensive and simple operation such as an amplifier operation. Will get.

本発明の請求項1に係る光センサ装置及び請求項4に係る光センサ装置を用いたワークの位置検出方では、上記した構成としているので、搬送されるワークを短時間でしかも正確に所定位置に停止させることができるのは勿論のこと、ワークの位置検出に係るコストの低減及び作業性の向上を実現することが可能であるという非常に優れた効果がもたらされる。   Since the workpiece position detection method using the optical sensor device according to claim 1 and the optical sensor device according to claim 4 of the present invention is configured as described above, the workpiece to be conveyed can be accurately positioned in a short time. As a matter of course, it is possible to achieve a very excellent effect that it is possible to realize a reduction in cost and an improvement in workability of the workpiece position detection.

また、本発明の請求項2に係る光センサ装置では、上記した構成としているので、段取り換えの自動化を実現でき、本発明の請求項3に係る光センサ装置では、上記した構成としているので、SN比を低下させることなく検出幅を変更することができる。   In addition, since the optical sensor device according to claim 2 of the present invention has the above-described configuration, it is possible to realize automatic setup change, and the optical sensor device according to claim 3 of the present invention has the above-described configuration. The detection width can be changed without reducing the SN ratio.

以下、本発明を図面に基づいて説明する。
図1及び図2は、本発明の一実施形態に係る光センサ装置を示しており、この実施形態では、本発明に係る光センサ装置を搬送されるワークとしてのプリント基板の位置決めに用いた場合を例に挙げて説明する。
図1に示すように、この光センサ装置1は、光源2に接続する光ファイバ11を具備して、ベルトコンベア(ワーク搬送路)Bの一方の側縁がわからベルトコンベアBを横切る方向に投光する投光側光ファイバユニット10Aと、計測器3に接続する光ファイバ12を具備して、ベルトコンベアBの他方の側縁がわ対向位置で投光側光ファイバユニット10Aから投光された光を受ける受光側光ファイバユニット10Bと、計測器3内に配置されて受光側光ファイバユニット10Bの光ファイバ12と接続する光電センサ13を備えている。
Hereinafter, the present invention will be described with reference to the drawings.
1 and 2 show an optical sensor device according to an embodiment of the present invention. In this embodiment, the optical sensor device according to the present invention is used for positioning a printed circuit board as a work to be conveyed. Will be described as an example.
As shown in FIG. 1, this optical sensor device 1 includes an optical fiber 11 connected to a light source 2, and projects one side edge of a belt conveyor (work conveyance path) B in a direction crossing the belt conveyor B. The light-projecting side optical fiber unit 10A and the optical fiber 12 connected to the measuring instrument 3 are provided, and the other side edge of the belt conveyor B is projected from the light-projecting side optical fiber unit 10A at the position facing the wrinkle. A light receiving side optical fiber unit 10B that receives light and a photoelectric sensor 13 that is disposed in the measuring instrument 3 and is connected to the optical fiber 12 of the light receiving side optical fiber unit 10B are provided.

投光側光ファイバユニット10A及び受光側光ファイバユニット10Bは、プリント基板Pの移動方向に沿う投光面10a及び受光面10bをそれぞれ具備しており、受光側光ファイバユニット10Bは、両面10a,10b間にプリント基板Pが進入するのに伴って受光面10bの受光量が単調に減衰する特性を有している。
一方、光電センサ13は、図2に示すように、受光量が急変する特性領域Aを有しており、二つの異なった受光量に対応した相対受光レベルでの閾値S1,S2を特性領域A内に設定して定まるプリント基板Pの減速開始位置P1及びプリント基板Pの所定停止位置P2(二つの位置)で基板検出信号を出力するようになっている。
The light projecting side optical fiber unit 10A and the light receiving side optical fiber unit 10B are respectively provided with a light projecting surface 10a and a light receiving surface 10b along the moving direction of the printed circuit board P. The light receiving side optical fiber unit 10B includes both surfaces 10a, The amount of light received by the light receiving surface 10b monotonously attenuates as the printed board P enters between 10b.
On the other hand, as shown in FIG. 2, the photoelectric sensor 13 has a characteristic region A in which the amount of received light suddenly changes, and thresholds S1 and S2 at relative light reception levels corresponding to two different amounts of received light are set in the characteristic region A. A board detection signal is output at a deceleration start position P1 of the printed circuit board P and a predetermined stop position P2 (two positions) of the printed circuit board P, which are set and determined inside.

図2において、光ファイバユニット10A,10B間距離Lが互いに異なる場合の基板位置−相対受光レベル曲線T1〜T3を示していて、例えば、基板位置−相対受光レベル曲線T1では、特性領域A内における相対受光レベルでの閾値S1,S2をそれぞれ85%及び55%としており、これで定まるプリント基板Pの減速開始位置P1及びプリント基板Pの所定停止位置P2の間隔は、約0.5mmとなっている。   FIG. 2 shows substrate position-relative light reception level curves T1 to T3 when the distance L between the optical fiber units 10A and 10B is different from each other. The thresholds S1 and S2 at the relative light receiving level are 85% and 55%, respectively, and the interval between the deceleration start position P1 of the printed circuit board P and the predetermined stop position P2 of the printed circuit board P determined by this is about 0.5 mm. Yes.

この場合、計測器3内には制御部14が内蔵してあり、異なるワーク毎に閾値S1,S2を設定して記憶し、外部信号によりワークが指定された段階で該当するワークの閾値S1,S2を自動選択するようになっている。
このような光センサ装置1では、ベルトコンベアBによって移動するプリント基板Pの位置検出を行うに際して、投光側光ファイバユニット10Aの投光面10a及び受光側光ファイバユニット10Bの受光面10b間にプリント基板Pが進入すると、これに伴って受光側光ファイバユニット10Bにおける受光面10bの受光量が単調に減衰し始める。
In this case, the control unit 14 is built in the measuring instrument 3, and the threshold values S1 and S2 are set and stored for each different workpiece, and the workpiece threshold value S1 and S1 corresponding to the workpiece are specified at the stage where the workpiece is designated by an external signal. S2 is automatically selected.
In such an optical sensor device 1, when detecting the position of the printed circuit board P that is moved by the belt conveyor B, between the light projecting surface 10 a of the light projecting side optical fiber unit 10 A and the light receiving surface 10 b of the light receiving side optical fiber unit 10 B. When the printed circuit board P enters, the received light amount of the light receiving surface 10b in the light receiving side optical fiber unit 10B starts to attenuate monotonously.

この際、投光側光ファイバユニット10Aの投光面10a及び受光側光ファイバユニット10Bの受光面10b間には、光電センサ13の特性領域A内に二つの異なった受光量に対応する閾値S1,S2を設定することによって、基板検出信号を出力可能なプリント基板Pの減速開始位置P1及びプリント基板Pの所定停止位置P2が定めてあるので、プリント基板Pの進行に伴って減衰する受光量に基づいて光電センサ13がプリント基板Pの減速開始位置P1への到達を識別すると、基板検出信号が出力されてプリント基板Pの減速が開始することとなり、続いて、プリント基板Pのさらなる進行に伴って減衰する受光量に基づいて光電センサ13がプリント基板Pの所定停止位置P2への到達を識別すると、上記と同じく基板検出信号が出力されてプリント基板Pが所定位置P2に停止することとなる。   At this time, a threshold value S1 corresponding to two different amounts of received light within the characteristic region A of the photoelectric sensor 13 between the light projecting surface 10a of the light projecting side optical fiber unit 10A and the light receiving surface 10b of the light receiving side optical fiber unit 10B. , S2 is set, the deceleration start position P1 of the printed circuit board P that can output the circuit board detection signal and the predetermined stop position P2 of the printed circuit board P are determined, so that the received light amount that attenuates with the progress of the printed circuit board P When the photoelectric sensor 13 identifies the arrival of the printed circuit board P at the deceleration start position P1, the circuit board detection signal is output to start the deceleration of the printed circuit board P. Subsequently, the printed circuit board P further proceeds. When the photoelectric sensor 13 identifies the arrival of the printed circuit board P at the predetermined stop position P2 based on the received light amount that attenuates, the circuit board detection signal is the same as described above. Output has been printed board P is to be stopped at a predetermined position P2.

このように、上記した光センサ装置1では、プリント基板Pの減速開始位置P1及びプリント基板Pの所定停止位置P2が、光電センサ13の特性領域A内に設定された二つの異なった受光量に対応する閾値S1,S2によって定められているので、両位置P1,P2の間隔を狭く設定し得ることとなり、加えて、アンプ操作といった安価で且つ簡単な操作によってプリント基板Pの停止位置の変更にも対応し得ることとなる。   As described above, in the optical sensor device 1 described above, the deceleration start position P1 of the printed circuit board P and the predetermined stop position P2 of the printed circuit board P have two different received light amounts set in the characteristic region A of the photoelectric sensor 13. Since it is determined by the corresponding threshold values S1 and S2, the interval between the positions P1 and P2 can be set narrow, and in addition, the stop position of the printed circuit board P can be changed by an inexpensive and simple operation such as an amplifier operation. Can also respond.

また、上記した光センサ装置1では、異なるワーク毎に閾値S1,S2を設定して記憶し、外部信号によりワークが指定された段階で該当するワークの閾値S1,S2を自動選択する制御部14を計測器3に内蔵しているので、段取り換えの自動化が図られることとなる。
さらに、上記した光センサ装置1において、投光側光ファイバユニット10Aの投光面10a及び受光側光ファイバユニット10Bの受光面10bに光芒幅調整用スリット15(図1に仮想線で示す)を設けることで、二つの異なった受光量に対応した閾値S1,S2の間隔を調整するように成すことができ、このような構成を採用すると、二つの閾値S1,S2間の受光量変化が急峻なものとなって、SN比の低下を回避し得ることとなる。
In the optical sensor device 1 described above, the threshold values S1 and S2 are set and stored for each different workpiece, and the control unit 14 automatically selects the threshold values S1 and S2 of the corresponding workpiece when the workpiece is designated by an external signal. Is built in the measuring instrument 3, so that the changeover of the setup is automated.
Further, in the optical sensor device 1 described above, the light beam width adjusting slit 15 (shown by an imaginary line in FIG. 1) is provided on the light projecting surface 10a of the light projecting side optical fiber unit 10A and the light receiving surface 10b of the light receiving side optical fiber unit 10B. By providing, it is possible to adjust the interval between the threshold values S1 and S2 corresponding to two different received light amounts. When such a configuration is adopted, the change in the received light amount between the two threshold values S1 and S2 is steep. Therefore, a decrease in the SN ratio can be avoided.

上記した実施形態では、本発明に係る光センサ装置を搬送されるプリント基板の位置決めに用いた場合を例に挙げて説明したが、これに限定されるものではない。   In the above-described embodiment, the case where the optical sensor device according to the present invention is used for positioning a printed board to be conveyed has been described as an example, but the present invention is not limited to this.

本発明の一実施形態に係る光センサ装置を概略的に示す斜視説明図である。1 is an explanatory perspective view schematically showing an optical sensor device according to an embodiment of the present invention. 図1における光センサ装置の光電センサの受光量が急変する特性領域を示す基板位置と相対受光レベルとの関係線図である。FIG. 2 is a relationship diagram between a substrate position and a relative light reception level showing a characteristic region in which the amount of light received by the photoelectric sensor of the optical sensor device in FIG.

符号の説明Explanation of symbols

1 光センサ装置
2 光源
3 計測器
10A 投光側光ファイバユニット
10B 受光側光ファイバユニット
10a 投光面
10b 受光面
11,12 光ファイバ
11a 光ファイバの端面
13 光電センサ
14 制御部
15 光芒幅調整用スリット
A 光電センサの特性領域
B ベルトコンベア(ワーク搬送路)
P プリント基板(ワーク)
P1 プリント基板の減速開始位置
P2 プリント基板の所定停止位置
S1,S2 閾値
DESCRIPTION OF SYMBOLS 1 Optical sensor apparatus 2 Light source 3 Measuring instrument 10A Light emission side optical fiber unit 10B Light reception side optical fiber unit 10a Light emission surface 10b Light reception surface 11, 12 Optical fiber 11a End surface of optical fiber 13 Photoelectric sensor 14 Control part 15 Light width adjustment Slit A Photoelectric sensor characteristic area
B Belt conveyor (work conveyance path)
P Printed circuit board (work)
P1 Deceleration start position of printed circuit board P2 Predetermined stop position of printed circuit board S1, S2 Threshold

Claims (4)

ワーク搬送路上を移動するワークの位置検出を行う光センサ装置であって、
前記ワーク搬送路の一方の側縁がわに位置して該ワーク搬送路を横切る方向に投光する投光側光ファイバユニットと、
前記ワーク搬送路の他方の側縁がわに位置して前記投光側光ファイバユニットから投光された光を受ける受光側光ファイバユニットと、
この受光側光ファイバユニットの光ファイバと接続する光電センサを備え、
前記投光側光ファイバユニット及び受光側光ファイバユニットは、前記ワークの移動方向に沿う投光面及び受光面をそれぞれ具備して、両面間にワークが進入するのに伴って前記受光側光ファイバユニットにおける受光面の受光量が単調に減衰する特性を有し、
前記光電センサは、受光量が急変する特性領域を有し、二つの異なった前記受光量に対応した閾値を前記特性領域内に設定して定まる二つの位置でワーク検出信号を出力する
ことを特徴とする光センサ装置。
An optical sensor device for detecting the position of a workpiece moving on a workpiece conveyance path,
A light-projecting-side optical fiber unit that projects light in a direction across one side edge of the work transport path and at the side of the work transport path;
A light-receiving-side optical fiber unit that receives light projected from the light-projecting-side optical fiber unit with the other side edge of the work transport path located on the side;
A photoelectric sensor connected to the optical fiber of the light receiving side optical fiber unit,
The light projecting side optical fiber unit and the light receiving side optical fiber unit each have a light projecting surface and a light receiving surface along the moving direction of the work, and the light receiving side optical fiber as the work enters between both surfaces. The unit has a characteristic that the amount of light received on the light receiving surface attenuates monotonously
The photoelectric sensor has a characteristic region in which the amount of received light changes suddenly, and outputs a workpiece detection signal at two positions determined by setting threshold values corresponding to two different amounts of received light in the characteristic region. An optical sensor device.
異なるワーク毎に閾値を設定して記憶し、外部信号によりワークが指定された段階で該当するワークの閾値を自動選択する制御部を設けた請求項1に記載の光センサ装置。   The optical sensor device according to claim 1, further comprising a control unit that sets and stores a threshold value for each different workpiece, and automatically selects a threshold value of the corresponding workpiece when the workpiece is designated by an external signal. 前記投光側光ファイバユニットの投光面及び受光側光ファイバユニットの受光面に、二つの異なった前記受光量に対応した閾値の間隔を調整する光芒幅調整用スリットを設けた請求項1又は2に記載の光センサ装置。   The light projecting width adjusting slit for adjusting the interval between the thresholds corresponding to the two different received light amounts is provided on the light projecting surface of the light projecting side optical fiber unit and the light receiving surface of the light receiving side optical fiber unit. 3. The optical sensor device according to 2. ワーク搬送路の一方の側縁がわに位置して該ワーク搬送路を横切る方向に投光する投光側光ファイバユニットと、前記ワーク搬送路の他方の側縁がわに位置して前記投光側光ファイバユニットから投光された光を受ける受光側光ファイバユニットと、この受光側光ファイバユニットの光ファイバと接続する光電センサを備えた光センサ装置を用いて、前記ワーク搬送路上を移動するワークの位置検出を行うに際して、
前記投光側光ファイバユニット及び受光側光ファイバユニットには、前記ワークの移動方向に沿う投光面及び受光面をそれぞれ具備して、両面間にワークが進入するのに伴って前記受光側光ファイバユニットにおける受光面の受光量が単調に減衰する特性を有する光ファイバユニットを用い、
前記光電センサには、受光量が急変する特性領域を有する光電センサを使用して、二つの異なった前記受光量に対応した閾値を前記特性領域内に設定して定まる二つの位置でワーク検出信号を出力させる
ことを特徴とする光センサ装置を用いたワークの位置検出方法。
A light-projecting side optical fiber unit that projects light in a direction across one side of the work transport path and a side of the work transport path, and the other side edge of the work transport path is positioned on the side of the projecting light. Moves on the workpiece conveyance path using a light receiving side optical fiber unit that receives light projected from the light side optical fiber unit and a photo sensor device that includes a photoelectric sensor connected to the optical fiber of the light receiving side optical fiber unit. When detecting the position of the workpiece to be
The light projecting side optical fiber unit and the light receiving side optical fiber unit are respectively provided with a light projecting surface and a light receiving surface along the moving direction of the workpiece, and the light receiving side light is transmitted as the work enters between both surfaces. Using an optical fiber unit that has a characteristic that the amount of light received on the light receiving surface of the fiber unit attenuates monotonously,
Using the photoelectric sensor having a characteristic region in which the amount of received light changes suddenly as the photoelectric sensor, workpiece detection signals are set at two positions determined by setting threshold values corresponding to the two different amounts of received light in the characteristic region. The position detection method of the workpiece | work using the optical sensor apparatus characterized by the above-mentioned.
JP2008059283A 2008-03-10 2008-03-10 Photosensor device and workpiece position detecting method using the same Pending JP2009216489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008059283A JP2009216489A (en) 2008-03-10 2008-03-10 Photosensor device and workpiece position detecting method using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008059283A JP2009216489A (en) 2008-03-10 2008-03-10 Photosensor device and workpiece position detecting method using the same

Publications (1)

Publication Number Publication Date
JP2009216489A true JP2009216489A (en) 2009-09-24

Family

ID=41188504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008059283A Pending JP2009216489A (en) 2008-03-10 2008-03-10 Photosensor device and workpiece position detecting method using the same

Country Status (1)

Country Link
JP (1) JP2009216489A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052929A (en) * 2009-11-10 2011-05-11 欧姆龙株式会社 Photoelectric sensor
JP2015087317A (en) * 2013-10-31 2015-05-07 株式会社コスモテック Optical sensor, detection device and detection method
WO2016103371A1 (en) * 2014-12-24 2016-06-30 富士機械製造株式会社 Conveyed object detecting system
JP2020118639A (en) * 2019-01-28 2020-08-06 日本電産サンキョー株式会社 Medium detector and medium detection method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052929A (en) * 2009-11-10 2011-05-11 欧姆龙株式会社 Photoelectric sensor
EP2320192A1 (en) 2009-11-10 2011-05-11 Omron Corporation Photoelectric Sensor
KR101246394B1 (en) 2009-11-10 2013-03-21 오므론 가부시키가이샤 Photo electric sensor
US8890054B2 (en) 2009-11-10 2014-11-18 Omron Corporation Photoelectric sensor used for detection of thin objects
JP2015087317A (en) * 2013-10-31 2015-05-07 株式会社コスモテック Optical sensor, detection device and detection method
WO2016103371A1 (en) * 2014-12-24 2016-06-30 富士機械製造株式会社 Conveyed object detecting system
JPWO2016103371A1 (en) * 2014-12-24 2017-10-05 富士機械製造株式会社 Conveyed object detection system
JP2020118639A (en) * 2019-01-28 2020-08-06 日本電産サンキョー株式会社 Medium detector and medium detection method
JP7239332B2 (en) 2019-01-28 2023-03-14 日本電産サンキョー株式会社 MEDIUM DETECTION DEVICE AND MEDIUM DETECTION METHOD

Similar Documents

Publication Publication Date Title
JP2009216489A (en) Photosensor device and workpiece position detecting method using the same
CN107014408B (en) Distance setting type photoelectric sensor
JP2009136858A (en) Distance sensor for paste dispenser
JP2014157960A (en) Substrate positioning method
JP4957444B2 (en) Substrate transport apparatus and substrate transport method
JP2003174282A (en) Printed board mounting apparatus
KR960026091A (en) Reticle Aligner and Method
JP2006295093A (en) Work system to circuit board
JP2009043955A (en) Conveyor and conveying method of substrate
JP2007258386A (en) Transferred board detecting device
US7401779B2 (en) Sheet feeding apparatus
JP2010092970A (en) Transferred substrate detecting device
JP5278845B2 (en) Active object detection device with sensitivity adjustment
JP2002319795A (en) Carrier for plate-shaped work
JP7329943B2 (en) Detection device and movement device
US7106458B2 (en) Device for detecting edges of sheet-shaped materials
JP5410137B2 (en) Photoelectric sensor
JP4736597B2 (en) Medium detection device
JP2004205361A (en) Object detecting method
JP4238683B2 (en) Substrate detection method in electronic component mounting apparatus
JP4218398B2 (en) Peripheral exposure equipment for film circuit board
KR20160064628A (en) Sensor Apparatus for Detection Position of PCB
JP2010032242A (en) Substrate detecting apparatus
JP2004003995A (en) Substrate detecting sensor
JP2017055107A (en) Feeding device of electronic component transfer tape