JPS5858403A - Automatic measuring device for crack width - Google Patents

Automatic measuring device for crack width

Info

Publication number
JPS5858403A
JPS5858403A JP15675181A JP15675181A JPS5858403A JP S5858403 A JPS5858403 A JP S5858403A JP 15675181 A JP15675181 A JP 15675181A JP 15675181 A JP15675181 A JP 15675181A JP S5858403 A JPS5858403 A JP S5858403A
Authority
JP
Japan
Prior art keywords
crack
width
lens
image sensor
concrete
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
JP15675181A
Other languages
Japanese (ja)
Inventor
Teruo Eino
照雄 営野
Muneo Kawamura
河村 宗夫
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.)
Shimizu Construction Co Ltd
Original Assignee
Shimizu Construction 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 Shimizu Construction Co Ltd filed Critical Shimizu Construction Co Ltd
Priority to JP15675181A priority Critical patent/JPS5858403A/en
Publication of JPS5858403A publication Critical patent/JPS5858403A/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
    • G01B11/024Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of diode-array scanning

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To make measuring work extremely easy and to decrease errors in measurement by forming the image of the crack on an object surface on an image sensor by means of a lens, and operating the width of the crack from the output signals thereof. CONSTITUTION:A body 1 of this device is constituted of a lens 4, a one-dimensional image sensor 5 arrayed with many photoelements 6, a lamp 3, an arithmetic mechanism 7, a digital display part 8, and dry cells 9. The body 1 is placed on the surface of concrete 2, and the surface is illuminated with the lamp 3. The video of a crack 10 is formed by the lens 4 on the sensor 5. The output signals of the sensor 5 are inputted to the mechanism 7, by which the number of the elements 6 in the part C' of the figure corresponding to the width of the crack is counted, and the width of the crack is calculated. The result is digitally displayed on the display part 8. Therefore, the measurement work is extremely simple and easy, the width is measured with 0.1mm. accuracy and the errors in measurement are decreased.

Description

【発明の詳細な説明】 本発明はコンクリート表面等に生じ九クラックの幅を自
動的に針濁する計−1装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically reducing the width of nine cracks occurring on a concrete surface.

例えば、鉄筋コンクリート構造の構築物においては、構
築後外mあるいはスラブ等にクラックが生じることがし
ばしばある。ところで、このようにクラックが生じた場
合構業物の耐久性が低下し。
For example, in a reinforced concrete structure, cracks often occur on the outside or in the slab after construction. By the way, when cracks occur in this way, the durability of the structure decreases.

また耐震性の低下をもまねくおそれがあるから。It may also lead to a decrease in earthquake resistance.

クツツク幅を測定してその影響を検討する必要がある。It is necessary to measure the shoe width and consider its influence.

しかるに、従来、コンクリート表面部に生じ九クラック
幅を測定する場合、透明な板材に目盛が付されてなるク
ラックスケールをり2ツクに押し尚てることにより測定
してい友。しかしながら。
However, conventionally, when measuring the width of a crack that occurs on the surface of concrete, it has been done by pressing a crack scale made of a transparent plate with graduations on it. however.

従来のこのような測定方法にあっては、目視による比較
作業であるから、測定作業が面倒で手間がかかり、しか
も作業員の判断が介入するから、+11J定娯差が生じ
易いという欠点があつ九。
This conventional measurement method involves visual comparison, which is troublesome and time-consuming, and requires the judgment of the operator, so it has the disadvantage that +11J constant difference is likely to occur. Nine.

本発明は上記事情VcfI!7iみてなされたもので、
+ilb定作業上作業間で容島に行なうことができ、し
かも測定誤差が小さいクラック幅自動計欄装置を提供す
るヒとを目的とする。
The present invention is based on the above-mentioned situation VcfI! This was done after watching 7i.
An object of the present invention is to provide an automatic crack width measurement device that can be used to measure the width of a crack between regular operations and has a small measurement error.

以下1本発明の一実施例について図面を参照して説明す
る。図中1は装置本体で、その下面は平坦とされており
、そして例えばコンクリート2の表面に安定した状態で
載置されるようになされている。装置本体1の所定箇所
にはランプ3が設けられている。また、装置本体1の他
の所定箇所にはレンズ4が設けられている。また、装置
本体1をコンクリート20表面に載置し九際レンズ4に
よってコンクリート20表面が結像される箇所にはMO
81tあるいはOOD型−次元イメージセンサ−5が設
けられている。この−次元イメージセンサー5ij、7
オトエレメント6を多数例えば512@−直線上に一定
ピッチで並べて内蔵しているものである。フォトエレメ
ント6は1−”)1つが独立して作動し、そしてイメー
ジセンサ−5の出力端子からは各フォトエレメント6に
照射される光の強弱に比例して流れる電流を出力信号と
して順次とり出せるようになされている。なお、7は演
算機構、8は液晶ないしは発光ダイオードからなるデジ
タル表示部、9は乾電池である。
An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes the main body of the apparatus, the lower surface of which is flat, and is designed to be stably placed, for example, on the surface of concrete 2. A lamp 3 is provided at a predetermined location on the main body 1 of the apparatus. Further, a lens 4 is provided at another predetermined location of the device main body 1. In addition, the device main body 1 is placed on the surface of the concrete 20, and the MO
An 81t or OOD type dimensional image sensor 5 is provided. This -dimensional image sensor 5ij, 7
A large number of automatic elements 6, for example 512, are built in and arranged in a straight line at a constant pitch. One of the photo elements 6 (1-'') operates independently, and a current flowing in proportion to the intensity of light irradiated to each photo element 6 can be sequentially extracted from the output terminal of the image sensor 5 as an output signal. Note that 7 is a calculation mechanism, 8 is a digital display section consisting of a liquid crystal or a light emitting diode, and 9 is a dry battery.

次に、上記構成のクラック幅自動計掬装置の作用につい
て説明する。まず、fI装置本体をコンクリート20表
面に載置して、レンズ4を測定すべきクラック10に対
向させると共に、9ンプ3によってクツツク10および
その近傍を照射する。
Next, the operation of the automatic crack width measuring device having the above configuration will be explained. First, the main body of the fI apparatus is placed on the surface of the concrete 20, the lens 4 is made to face the crack 10 to be measured, and the crack 10 and its vicinity are irradiated by the nine lamps 3.

すると、コンクリート20表面は明るく照らされ。Then, the surface of the concrete 20 is brightly illuminated.

他方、り2ツク10は光があたらず影になる。そして、
このようなりラックlOおよびその近傍はレンズ4によ
って一次元イメージセンサー5上に結像される。すなわ
ち、−次元イメージセンサ−5上の図中人lおよびB′
部分Kriコンクリート20表面の人およびB部分が結
像され、他方、−次元イメージセンサ−5上の図中07
部分にはコンクリート2のクラック10つtす0部分が
結像される。
On the other hand, the light does not shine on the Ri2tsuk 10, resulting in a shadow. and,
In this way, the rack lO and its vicinity are imaged onto the one-dimensional image sensor 5 by the lens 4. That is, people L and B' in the figure on the -dimensional image sensor-5
The person on the surface of part Kri concrete 20 and part B are imaged, and on the other hand, 07 in the figure above -dimensional image sensor-5
10 cracks in the concrete 2 are imaged in this area.

このため1.A′およびB′部分に存するフォトエレメ
ント6と0/部分に存するフォトエレメント6とでは出
力信号に:差^が生じる。ところで、フォトエレメント
6のピッチは一定になされているから。
For this reason, 1. A difference occurs in the output signal between the photoelement 6 existing in the A' and B' portions and the photoelement 6 existing in the 0/portion. By the way, the pitch of the photo elements 6 is constant.

図中07部分に存するフォトエレメント6の数はクラッ
ク10の幅に対して 比例関係にある。そこで。
The number of photo elements 6 present in portion 07 in the figure is proportional to the width of the crack 10. Therefore.

これらフォトエレメント6を内蔵しているイメージセン
サ−5の出力信号を用い、イメージセンサ−5に接続さ
れ九演算機構7によって0′部分に存するフォトエレメ
ント6の数をカウントし、そしてこのカラント数に定数
を乗じることにより、クツツク幅の値を算出することが
できる。このようにして算出されたりラック幅の値は表
示[8によってデジタル表示される。すなわち1作業員
は装置本体1をコンクリート20表面に載置するだけと
いう極めて簡単な作業によって例えば幅がθ〜9.9−
範囲内にあるクラックを0.1wll1の精度で測定す
ることがで亀る。!&九1本装置は極めて簡単な構成で
あるから、コンパクト化する仁とができ。
Using the output signal of the image sensor 5 containing these photo elements 6, the number of photo elements 6 existing in the 0' portion is counted by the nine arithmetic mechanism 7 connected to the image sensor 5, and this currant number is By multiplying by a constant, the value of the tick width can be calculated. The value of the rack width calculated in this way is displayed digitally by the display [8]. That is, one worker can adjust the width, for example, from θ to 9.9− by simply placing the device body 1 on the surface of the concrete 20.
It is possible to measure cracks within the range with an accuracy of 0.1wll1. ! &91 Since this device has an extremely simple configuration, it can be made compact.

また低コストで得ることができ、しかも電源として乾電
池9を用いて′いるから、取扱いが簡単である。
Moreover, it can be obtained at low cost, and since it uses a dry cell battery 9 as a power source, it is easy to handle.

なお、上記実施例においては、水平状のコンクリート2
0表面に生じたクラックlOの幅を測定する場合につい
て説明したが、コンクリート2のlII面の傾斜がどの
ようであっても測定することができることは勿論である
In addition, in the above embodiment, the horizontal concrete 2
Although the case where the width of the crack lO generated on the surface of the concrete 2 is measured has been described, it goes without saying that the measurement can be performed regardless of the slope of the lII surface of the concrete 2.

tた。上記実施例においては、コンクリート2の表面に
生じたクラックlOの幅を測定する場合について説明し
たが、これに限られることなく。
It was. In the above embodiment, a case has been described in which the width of a crack IO generated on the surface of concrete 2 is measured, but the present invention is not limited to this.

他の一体にも適用し得ることは勿論である。Of course, it can also be applied to other units.

以上説明したように1本発明によるクラック幅自動針掬
装置によれば、物体表面に生じたクツツクおよびその近
傍をレンズによって一次元イメージセンサーに結像させ
、この−次元イメージセンサ−からの出力信号にもとづ
いて前記クラックの幅を演算してデジタル表示するよう
にした構成であるから、歯上作業を短時間で谷J6に行
なうことができ、しかも#j定誤差が小さく、特に満足
箇所が多数ある場合には極めて便利であり、加えて構成
が簡単でコンパクトにすることができ、しかも低コスト
で得ることができる等の効果を有する。
As explained above, according to the crack width automatic needle scooping device according to the present invention, the cracks generated on the surface of an object and the vicinity thereof are imaged on a one-dimensional image sensor by a lens, and the output signal from this -dimensional image sensor is Since the width of the crack is calculated and digitally displayed based on the structure, it is possible to carry out work on the teeth in the valley J6 in a short time, and the #j constant error is small, and there are many parts that are particularly satisfactory. In some cases, it is extremely convenient, and in addition, it has the advantage of being simple and compact in structure, and can be obtained at low cost.

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

図面は本発明によるりラック幅自動針橢装置の一実施例
を示す概略縦V#側面図である。 l・・・装置本体、3・・・う/グ、4・・・レンズ、
5・・・−次元イメージセンサ−,7・・・演算機構。 8・・・デジタル表示部、10・・・クラック。 出顯人清水建設株式会社
The drawing is a schematic vertical V# side view showing an embodiment of the rack width automatic needle checking device according to the present invention. l...Device main body, 3...U/G, 4...Lens,
5...-dimensional image sensor-, 7... calculation mechanism. 8...Digital display section, 10...Crack. Shimizu Construction Co., Ltd.

Claims (1)

【特許請求の範囲】 うに設けられたレンズ(4)と、前記クラック四を照射
する光源(3)と、1Ifr記レンズ(4)によって前
記クラックa〔が結像される箇所に設けられた一次元イ
メージセンサー(5)と、該−次元イメージセンサ−(
5)からの出力信号にもとづいて前記クラック員の幅を
演算する演算機構(7)と、咳演算機構())によって
演算されたクラック幅の値をデジタル表示する表示部(
8)とからなることを特徴とするクラック幅自動針掬装
置。
[Claims] A lens (4) provided at a location where the crack a is imaged, a light source (3) that irradiates the crack a, and a primary light source provided at a location where the crack a is imaged by the lens (4). The original image sensor (5) and the -dimensional image sensor (
a calculation mechanism (7) that calculates the width of the crack member based on the output signal from the device (5); and a display unit (7) that digitally displays the value of the crack width calculated by the cough calculation mechanism ()).
8) A crack width automatic needle scooping device characterized by comprising:
JP15675181A 1981-10-01 1981-10-01 Automatic measuring device for crack width Pending JPS5858403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15675181A JPS5858403A (en) 1981-10-01 1981-10-01 Automatic measuring device for crack width

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15675181A JPS5858403A (en) 1981-10-01 1981-10-01 Automatic measuring device for crack width

Publications (1)

Publication Number Publication Date
JPS5858403A true JPS5858403A (en) 1983-04-07

Family

ID=15634516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15675181A Pending JPS5858403A (en) 1981-10-01 1981-10-01 Automatic measuring device for crack width

Country Status (1)

Country Link
JP (1) JPS5858403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142705A (en) * 1985-12-18 1987-06-26 Kobe Steel Ltd Production of cylinder for plastic molding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62142705A (en) * 1985-12-18 1987-06-26 Kobe Steel Ltd Production of cylinder for plastic molding device
JPH0336881B2 (en) * 1985-12-18 1991-06-03 Kobe Steel Ltd

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