JPS5877607A - Length measuring device for moving object - Google Patents

Length measuring device for moving object

Info

Publication number
JPS5877607A
JPS5877607A JP17612481A JP17612481A JPS5877607A JP S5877607 A JPS5877607 A JP S5877607A JP 17612481 A JP17612481 A JP 17612481A JP 17612481 A JP17612481 A JP 17612481A JP S5877607 A JPS5877607 A JP S5877607A
Authority
JP
Japan
Prior art keywords
moving object
time required
moving
data
indicating
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
JP17612481A
Other languages
Japanese (ja)
Inventor
Tsutomu Koike
勉 小池
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.)
Nippon Electric Industry Co Ltd
Original Assignee
Nippon Electric Industry Co Ltd
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 Nippon Electric Industry Co Ltd filed Critical Nippon Electric Industry Co Ltd
Priority to JP17612481A priority Critical patent/JPS5877607A/en
Publication of JPS5877607A publication Critical patent/JPS5877607A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/02Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/043Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length

Abstract

PURPOSE:To measure the length in the moving direction of a moving object by disposing two object detecting means which utilize rays at a prescribed distance. CONSTITUTION:When a moving object 2 passes respective points A, B, the rays emitted from light sources 3, 4 are no longer cast to photoelectric transducers 5, 6 whereby the passage of the object 2 is detected. The time required for the object 2 in moving between A and B is measured with a counter 12 and the time required for the object 2 to pass at respective points A and B is measured with counters 15, 16. From the data LD indicating the distance L between A and B stored in a storage section 17, the data DAW, DBW, indicating the time required for passing the respective points A and B, and the data DL indicating the time required for moving between A and B, a CPU20 operates DAW/DLXLD, DBW/ DLXLD, and operates the size value of the ofject 2 by averarging the respective values.

Description

【発明の詳細な説明】 本発明は移動物体の移動方向長さを移動中に非接触で測
定する装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the length of a moving object in a moving direction while the object is moving in a non-contact manner.

従来、コンベアによって移送される物体9例えば与棒の
切断片等の長さを移送中に非接触で測定する方法として
は9次のような方法が一般的である。
Conventionally, the following method has been commonly used to non-contactly measure the length of an object 9, such as a cut piece of a feeding bar, being transported by a conveyor.

すなわち、移動物体の通過域を間にして光源と光電管と
を配設することにより、一定のコンベア速度で移送され
てくる移動物体の通過を検出できるようにする。そして
移動物体の前端を検出してから後端が検出されるまでの
間に、あらかじめコーンベア速度との関係から一周期を
That is, by arranging the light source and the phototube with the moving object passage area in between, it is possible to detect the passage of the moving object transported at a constant conveyor speed. Then, from the time the front end of the moving object is detected until the rear end is detected, one cycle is determined in advance based on the relationship with the cone conveyor speed.

例えば1/I D mmに対応させた基準クロックパル
ス数を計数して、この計数値から移動物体の移動方向長
さを算出する方法である。
For example, there is a method of counting the number of reference clock pulses corresponding to 1/I D mm, and calculating the length of the moving object in the moving direction from this counted value.

ところがこの方法は、コンベア速度が常に一定であるこ
とが前提であり、コンベア駆動用電源電圧の変動、″駆
動部の経年変化、負荷変動等により速度が変化すると、
算出値に誤差を生じ。
However, this method assumes that the conveyor speed is always constant, and if the speed changes due to fluctuations in the conveyor drive power supply voltage, aging of the drive unit, load fluctuations, etc.
This causes an error in the calculated value.

基準クロックパルス幅が経年変化した場合にも同様な欠
点が生じていた。
A similar drawback occurred when the reference clock pulse width changed over time.

本発明はこの上′うな欠点に鑑み、測定領域内における
移動速度が等速であれば測定すべき物体毎に移動速度が
変化しても誤差無く測長可能であり、経年変化によ2て
も測定誤差を生ずることの無い移動物体の副長装置を提
供しようとするものである。
In view of these drawbacks, the present invention has been developed so that if the moving speed within the measurement area is constant, it is possible to measure the length without error even if the moving speed of each object to be measured changes. Another object of the present invention is to provide a sub-length device for moving objects that does not cause measurement errors.

本発明は、光線を利用した物体検出手段を所定距離をお
いて二つ配設して設定した2定点間を物体が移動するの
に要した時間と、物体が1定点を通過するのに要した時
間との比をとり。
The present invention measures the time required for an object to move between two fixed points set by disposing two object detection means using light beams at a predetermined distance, and the time required for an object to pass through one fixed point. Take the ratio with the time taken.

これらの比と前記所定距離との積をとることによって移
動物体の移動方向の長さを測定する装置である。
This device measures the length of a moving object in the moving direction by taking the product of these ratios and the predetermined distance.

第1図は本発明の一実施例の概略構成をプロ、ツク図で
示す。
FIG. 1 shows a schematic diagram of an embodiment of the present invention.

図において、1は定速コンベア、2はコンベア上の移動
物体で測定を要する長さの線分と移動方向とが平行にな
るようにコンベア上におかれる。3,4は一定距離りを
隔てて置かれたレーザ光等の光源、5,6はそれぞれ光
源3.4からのスポット光を受光して電気信号に変える
光電変換器でこれらは移動物体2の通過により光路が遮
断されるように配設される。7,8はA−D変換器 7
/、8/はインバータである。
In the figure, 1 is a constant speed conveyor, and 2 is a moving object on the conveyor, which is placed on the conveyor so that the line segment of the length to be measured is parallel to the direction of movement. Numerals 3 and 4 are light sources such as laser beams placed a certain distance apart, and photoelectric converters 5 and 6 each receive the spot light from the light source 3.4 and convert it into an electrical signal. It is arranged so that the optical path is blocked by the passage. 7 and 8 are A-D converters 7
/ and 8/ are inverters.

FtSフリップフロップ9.アンド回路10.基準クロ
ックパルス発生器11.カウンタ12とで。
FtS flip-flop9. AND circuit 10. Reference clock pulse generator 11. With counter 12.

移動物体2が一定距離りを移動するのに要した時間を検
出してこれをA−D変換によりデジタル化する基準寸法
検出手段が構成される。またアンド回路15,14 、
カウンタ15,16とで、A地点ならびにB地点におい
て移動物体2が通過するのに要しだ時間を検出してそれ
ぞれA−D変換によりデジタル化する移動物体寸法検出
手段が構成され、記憶部17.18.19と演算処理お
よび制御部(以下これをCPUと略称する)20とで。
A reference dimension detecting means is configured to detect the time required for the moving object 2 to move a certain distance and digitize it by AD conversion. Also, AND circuits 15, 14,
The counters 15 and 16 constitute a moving object size detecting means that detects the time required for the moving object 2 to pass at points A and B, and digitizes the detected time through A-D conversion. .18.19 and an arithmetic processing and control unit (hereinafter referred to as CPU) 20.

前述のデジタルデータをもとにあらかじめ定められたプ
ログラムに従って演算処理を行なってA地点およびB地
点における移動物体の寸法を算出する手段が構成される
Means is configured to calculate the dimensions of the moving object at point A and point B by performing arithmetic processing according to a predetermined program based on the digital data described above.

まず基準寸法検出手段について説明すると。First, the reference dimension detection means will be explained.

レーザ発振器のような光源3および4.光電変換器5お
よび6は、各々コンベア上の移動物体2が通過する位置
AおよびB地点に対応し、測長する移動物体2よりも長
い一定距離りを隔てて移動物体2の移動方向に直角な位
置に設置され、これによって移動物体2の先端が距離り
を移動するに要する時間を検出できるようにしている。
Light sources 3 and 4, such as laser oscillators. The photoelectric converters 5 and 6 correspond to points A and B, respectively, through which the moving object 2 passes on the conveyor, and are arranged perpendicular to the moving direction of the moving object 2 at a distance longer than the moving object 2 whose length is to be measured. This makes it possible to detect the time required for the tip of the moving object 2 to travel a distance.

すなわち移動物体2が最初に通過するA地点の光電変換
器5.A−D変換器7.インバータ7′をフリップフロ
ップ90セツト端子に接続し。
That is, the photoelectric converter 5 at point A where the moving object 2 first passes. A-D converter7. Connect the inverter 7' to the flip-flop 90 set terminal.

一定距離りを隔てた位置B地点の光電変換器6゜A−D
変換器8.インバータ8′をフリップフロップ9のリセ
ット入力端子に接続してセラ十、リセットのタイミング
を規定するようKしている。
Photoelectric converter 6°A-D at position B separated by a certain distance
Converter 8. An inverter 8' is connected to the reset input terminal of the flip-flop 9 to define the timing of the reset.

これにより移動物体2が光路を横切9光電変換器5.に
−D変換器7.インバータ7′によってインバータ7′
の出力カローレベルカラハイレベルタ8′によりインバ
ータ8′の出力がローレベルからハイレベルに変化する
までの時間をフリップ70ツブ9のハイレベルの出力信
号で検出できる。
This causes the moving object 2 to cross the optical path 9 photoelectric converter 5 . -D converter7. Inverter 7' by Inverter 7'
The time required for the output of the inverter 8' to change from a low level to a high level can be detected using the high level output signal of the flip 70 knob 9 using the output color high level transistor 8'.

更にフリップフロップ9の出力端子がアンド回路10の
一方の入力端子に接続され、他方の入力端子には基準ク
ロックパルス発生器11が接続されてフリップフロップ
回路9からハイレベル信号が出力されている間のクロッ
クパルスがカウンタ12で計数されることにより、移動
物体2が距離りを移動するのに要した時間が。
Further, the output terminal of the flip-flop 9 is connected to one input terminal of the AND circuit 10, and the reference clock pulse generator 11 is connected to the other input terminal, so that while the flip-flop circuit 9 outputs a high level signal, The time required for the moving object 2 to travel the distance is determined by counting the clock pulses of .

クロックパルス何周期分に相当するかが計数されて演算
用のデジタルデータDLとなる二 なお一定距離りを表
わすデジタルデータLDをあらかじめ読出し専用記憶部
17゛に記憶させておく。
The number of cycles of clock pulses is counted and used as digital data DL for calculation. Digital data LD representing a certain distance is stored in advance in the read-only storage section 17'.

一方、移動物体2の寸法検出手段にあっては。On the other hand, regarding the dimension detection means for the moving object 2.

アンド回路13.14と基準クロックパルス発生器11
とにより、A地点およびB地点でそれぞれ移動物体2が
通過している間のクロックパルスがカウンタ15,16
で計数され、移動物体2がそれぞれの地点を通過するの
に要した時間に相当するクロックパルス計数データが演
算用のデジタルデータDWとなる。なお各カウンタ15
.16は、一連のクロックパルスを計数したのち、これ
らのデータはCPU 20によりそれぞれ記憶部18.
19に記憶され9次の計数を開始する前にリセットされ
る。
AND circuit 13.14 and reference clock pulse generator 11
Therefore, the clock pulses while the moving object 2 is passing at points A and B are counted by the counters 15 and 16, respectively.
The clock pulse count data corresponding to the time required for the moving object 2 to pass through each point becomes the digital data DW for calculation. Note that each counter 15
.. 16 counts a series of clock pulses, and then these data are stored by the CPU 20 in the storage unit 18 .
19 and is reset before starting the 9th counting.

さて移動物体2がB地点を通過し終ると、A地点および
B地点を通過するのに要した時間を表わすデジタルデー
タDAW、 DBWが算出、記憶される。又一定距離り
を移動するのに要した時間を表わすデジタルデータDL
が得られるとCPU20はあらかじめ記憶部17に記憶
させておいた距離りを表わすデジタルデータLDを読み
出すと共に記憶部18に記憶されているデジタルデータ
DAWを読み出して、DAW/DLxLDの演算を行な
うと共に、記憶部19に記憶されているデジタルデータ
DBWを読み出してDBW/DLxLDと言う演算を行
ない、算出されたそれぞれの数値を平均して移動物体2
の寸法値とする。この平均算出値はCPU20を介して
プリンタ(図示省略)によりタイプアウトされる。
Now, when the moving object 2 finishes passing point B, digital data DAW and DBW representing the time required to pass point A and point B are calculated and stored. Also, digital data DL representing the time required to travel a certain distance.
When obtained, the CPU 20 reads out the digital data LD representing the distance stored in the storage unit 17 in advance, reads out the digital data DAW stored in the storage unit 18, and calculates DAW/DLxLD. The digital data DBW stored in the storage unit 19 is read out, the calculation DBW/DLxLD is performed, and each calculated value is averaged to determine the moving object 2.
The dimension value shall be This average calculated value is typed out by a printer (not shown) via the CPU 20.

このような演算処理および制御を行なう手段については
9例えばマイクロコンピュータを使用した周知技術を駆
使して容易に実施できるので詳細な説明は省略する。
Since the means for performing such arithmetic processing and control can be easily implemented by making full use of well-known techniques using, for example, a microcomputer, a detailed explanation will be omitted.

実施例では測定精度を上げるためにA地点およびB地点
でそれぞれ移動物体2の測長をして平均したが、測長け
1点のみでもよいことは明らかである。また本発明によ
りあらかじめCPU20に移動物体の規準寸法データを
記憶させておき、移動物体の測長によって基準寸法に対
する合、否を判別し表示することもできる。
In the embodiment, the length of the moving object 2 was measured and averaged at points A and B in order to improve the measurement accuracy, but it is clear that the length measurement may be performed at only one point. Further, according to the present invention, standard dimension data of a moving object can be stored in advance in the CPU 20, and whether the moving object conforms to the standard dimension can be determined and displayed by measuring the length of the moving object.

以上の説明かられかるように、二つの光電変換器間の距
離りが一定であり、その間で移動速度に大きな変化がな
ければ、移動速度が測定毎に変化してもその影響により
測定誤差が生ずることはまったくなく、同様にして基準
クロックパルス発生器における経年変化の影響も無くす
ことができることにより、特に連続的に移送されてくる
長い丸棒等の長さを移動状態のままで連続的に、容易に
、精度良く測定することができる。
As can be seen from the above explanation, if the distance between two photoelectric converters is constant and the moving speed does not change significantly between them, even if the moving speed changes from measurement to measurement, measurement errors will occur due to the effect. In the same way, the influence of aging on the reference clock pulse generator can be eliminated, making it possible to continuously transport long round rods, etc. , can be easily and accurately measured.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例のブロック構成図である。 図中、1はコンベア、2は移動物体、3,4は光源、5
,6は光電変換器、7.8はA−D変換器、9はフリッ
プフロップ、11は基準クロックパルス発生器、  1
2,15.16はカウンタ、1718.19は記憶部、
20はCPU0 第1図
FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, 1 is a conveyor, 2 is a moving object, 3 and 4 are light sources, and 5
, 6 is a photoelectric converter, 7.8 is an A-D converter, 9 is a flip-flop, 11 is a reference clock pulse generator, 1
2, 15.16 is the counter, 1718.19 is the storage section,
20 is CPU0 Figure 1

Claims (1)

【特許請求の範囲】 1、実質上等速で通過する物体の移動方向長さを測定す
る装置において、光源と受光器とを前記物体通過域をは
さんで配置した物体検出手段を移動方向に所定距離りを
おいて二組備え、これら二つの物体検出手段の出力によ
り前記物体が前記距離りを移動するのに要した時間を検
出してディジタル信号DLに変換する手段と、少なくと
も一つの前記物体検出手段の出力により前記物体が一地
点を通過するのに要した時間を検出してディジタル信号
贈に変換する手段と。 以下余白
[Claims] 1. In a device for measuring the length in the moving direction of an object passing at a substantially constant speed, an object detecting means in which a light source and a light receiver are arranged across the object passage area is arranged in the moving direction. a means for detecting the time required for the object to travel the distance and converting the detected time into a digital signal DL based on the outputs of the two object detecting means; Means for detecting the time required for the object to pass one point based on the output of the object detection means and converting the detected time into a digital signal. Margin below
JP17612481A 1981-11-02 1981-11-02 Length measuring device for moving object Pending JPS5877607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17612481A JPS5877607A (en) 1981-11-02 1981-11-02 Length measuring device for moving object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17612481A JPS5877607A (en) 1981-11-02 1981-11-02 Length measuring device for moving object

Publications (1)

Publication Number Publication Date
JPS5877607A true JPS5877607A (en) 1983-05-11

Family

ID=16008090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17612481A Pending JPS5877607A (en) 1981-11-02 1981-11-02 Length measuring device for moving object

Country Status (1)

Country Link
JP (1) JPS5877607A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02201107A (en) * 1989-01-30 1990-08-09 Hiroshi Sato Moving body outer diameter measuring instrument and method
US5291131A (en) * 1992-03-31 1994-03-01 Tsubakimoto Chain Co. Apparatus for measuring elongation of a circulating chain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02201107A (en) * 1989-01-30 1990-08-09 Hiroshi Sato Moving body outer diameter measuring instrument and method
US5291131A (en) * 1992-03-31 1994-03-01 Tsubakimoto Chain Co. Apparatus for measuring elongation of a circulating chain

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