JPS60104201A - Minute displacement measuring instrument - Google Patents
Minute displacement measuring instrumentInfo
- Publication number
- JPS60104201A JPS60104201A JP21150983A JP21150983A JPS60104201A JP S60104201 A JPS60104201 A JP S60104201A JP 21150983 A JP21150983 A JP 21150983A JP 21150983 A JP21150983 A JP 21150983A JP S60104201 A JPS60104201 A JP S60104201A
- Authority
- JP
- Japan
- Prior art keywords
- cursor
- rail
- displacement
- displacement meter
- displacement measuring
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は原子炉構造物の月別の微小変位測定２：）に係
り、特に圧力容器、配管等の金属拐料面の亀裂の先端付
近やその他年連続に生じた微小変位量および歪量を測定
する微小変位測定器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the monthly measurement of minute displacements of nuclear reactor structures2:), and particularly to the measurement of minute displacements that occur around the tips of cracks on metal surfaces of pressure vessels, piping, etc. This invention relates to a minute displacement measuring device that measures the amount of displacement and strain.
従来、この種の変位量および歪量の測定は歪ゲージ法に
よって、またはクリップ型変位計を利用することによっ
て行なわれている。歪ゲージ法による場合には、測定位
置に歪ゲージを接着して歪量を測定する。接着面の変位
の検出感度は高いが、歪ゲージを接着しない面の変位測
定はできないため、亀裂の先端付近やその他年連続に生
じた微小変位や歪の追跡検出は事実上不可能であり、従
って、亀裂伝播挙動の評価に不十分である。また、この
歪ゲージ法では、被測定材の接着面の研摩、接着スペー
スの必要性から測定作業が煩雑となる。Conventionally, this type of displacement and strain measurement has been carried out by a strain gauge method or by using a clip-type displacement meter. When using the strain gauge method, a strain gauge is attached to the measurement position to measure the amount of strain. Although the detection sensitivity of the displacement of the bonded surface is high, it is not possible to measure the displacement of the surface to which the strain gauge is not bonded, so it is virtually impossible to trace and detect minute displacements and strains that occur near the tips of cracks or other areas that occur continuously over the years. Therefore, it is insufficient for evaluating crack propagation behavior. In addition, in this strain gauge method, the measurement work becomes complicated due to the need for polishing the bonding surface of the material to be measured and the need for bonding space.
クリップ型変位計は歪ゲージ法を応用したものであって
、変位を検出する２本の足を有し、これを測定位置に固
定するか測定位置に突起を設けて変位計をひっかけるよ
うに取り付けて測定を行なうため、歪ゲージ法による場
合と同様の限界がある。今日、原子炉の安全性、信頼性
の実証は重要、不可欠の課題となっており、圧力容器、
配管等に生じた欠陥からの亀裂伝播挙動を定量的に評価
できる装置の開発が強く要請されている。A clip-type displacement meter is an application of the strain gauge method, and has two legs for detecting displacement, which can either be fixed at the measurement position or attached by providing a protrusion at the measurement position so that the displacement meter can be hooked onto it. Since the measurement is carried out using the strain gauge method, it has the same limitations as the strain gauge method. Today, verification of the safety and reliability of nuclear reactors has become an important and essential issue, and pressure vessels,
There is a strong demand for the development of a device that can quantitatively evaluate crack propagation behavior from defects occurring in piping, etc.
本発明の目的はこのような要請に応え、亀裂伝播挙動を
定量的に、高感度かつ簡便に測定できる微小変位測定器
を捉供することにある。An object of the present invention is to meet such demands and provide a minute displacement measuring instrument that can quantitatively, highly sensitively, and easily measure crack propagation behavior.
即ち、変位計を被測定拐の面上を縦横自由自在に移動す
る変位側支持手段を案出することによって、変位計の接
着、固定等の測定作業の煩雑さを除去するだけでなく、
亀裂の先端伺近、その他不連続に生じた微小変位を一回
の操作に追跡測定し、かつ変位計の先端を針状とするこ
とによって微小変位を高感度で検出する微小変位測定器
を提供することを目的とする。That is, by devising a displacement-side support means that allows the displacement meter to move freely vertically and horizontally on the surface of the object to be measured, it is possible to not only eliminate the complexity of measurement work such as gluing and fixing the displacement meter, but also
We provide a micro-displacement measuring device that traces and measures micro-displacements that occur near the tip of a crack or other discontinuously in a single operation, and that detects micro-displacements with high sensitivity by making the tip of the displacement meter needle-shaped. The purpose is to
この目的のため、本発明の微小変位測定器は、針状の検
出端を有する変位計と、スプリングを介して該変位計に
連結したカーソル、該カーソルを案内するカーソルレー
ルおよび該カーソルレールな該カーソルの移動する方向
と交叉する方向へ案内するガイドレールを具備する変位
計支持手段とから成ることを特徴とする。For this purpose, the minute displacement measuring device of the present invention includes a displacement meter having a needle-like detection end, a cursor connected to the displacement meter via a spring, a cursor rail that guides the cursor, and a cursor rail that guides the cursor. It is characterized by comprising a displacement meter support means having a guide rail for guiding in a direction crossing the direction in which the cursor moves.
以下に、本発明の一実施例として示した添付図面に基す
いて本発明の詳細な説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings, which are shown as one embodiment of the present invention.
第１図にお（・て、変位計１はスプリング２を介してカ
ーソル３に取り付けられ、カーソル３はカーソルレール
４の長手方向に摺動可能にカーソルレール４に取り付け
られ、カーソルレール４はその両端がそれぞれガイドレ
ール５（５）に摺動可能に取り付けられて微小変位測定
器が構成されており、この微小変位測定器は一対のコ字
状の枠体７（７）の被測定材９から離間して対面する一
辺にガイドレール５を介して固定されて設置され、被測
定材の平面内を自由に移動できるように構成されている
。In FIG. 1, the displacement meter 1 is attached to a cursor 3 via a spring 2, the cursor 3 is attached to the cursor rail 4 so as to be slidable in the longitudinal direction of the cursor rail 4, and the cursor rail 4 is Both ends are slidably attached to the guide rails 5 (5) to constitute a minute displacement measuring device, and this minute displacement measuring device is attached to the material to be measured 9 of a pair of U-shaped frames 7 (7). It is fixedly installed via a guide rail 5 on one side facing away from the object, and is configured to be able to move freely within the plane of the material to be measured.
また、この実施例では被測定材の表裏両面を同時的に測
定するために本発明の測定器が被測定材の両面に各々配
置されている。Furthermore, in this embodiment, the measuring instruments of the present invention are placed on both sides of the material to be measured, in order to simultaneously measure both the front and back surfaces of the material to be measured.
カーソル３は、実施例では箱形となっていて、その−側
面から変位計１を連結して支持するスプリング２が延び
、箱の中心部をカーソルレール４が垂直に慣通している
。しかし、カーソル３の形状およびカーソルレール４と
の係合の仕方はカーソル３がカーソルレール４の長手方
向に才習動可能であれば任意である。また、カーソル３
とカーソルレール４との間の滑り１ｈｉには摩擦力を持
たせるために板バネを取り付けるのが好ましい。The cursor 3 is box-shaped in this embodiment, and a spring 2 for connecting and supporting the displacement meter 1 extends from one side of the cursor 3, and a cursor rail 4 passes vertically through the center of the box. However, the shape of the cursor 3 and the manner of engagement with the cursor rail 4 are arbitrary as long as the cursor 3 can move in the longitudinal direction of the cursor rail 4. Also, cursor 3
It is preferable to attach a leaf spring to the slide 1hi between the cursor rail 4 and the cursor rail 4 in order to provide a frictional force.
スプリング２は変位計１魁被測定材９に対して直角に支
持し、変位計の検出端１１を測定位置９に一定の圧力で
押しつけるとともに、その反力で変位計１のカーソルレ
ール４上のずれを防止している。The spring 2 is supported perpendicularly to the displacement meter 1 and the measured material 9, and presses the detection end 11 of the displacement meter against the measurement position 9 with a constant pressure, and uses its reaction force to push the displacement meter 1 onto the cursor rail 4. Prevents misalignment.
カーソルレール４は被測定材９と平行して上下に延び、
その両端はカーソルレール４と３ｒ行して横方向へ延び
るガイドレール５を１動するように構成されている。The cursor rail 4 extends vertically in parallel with the material to be measured 9,
Both ends thereof are configured to move a guide rail 5 which extends in the lateral direction in 3r rows with the cursor rail 4.
カーソル３とカーソルレール４の被測定材に対する縦横
方向への移動は所定の駆動機構を介して自動的に行なわ
れる。カーソル３をカーソルレール４の一定位置へ固定
しておいてカーソルレール４のみをガイドレール５に沿
って移動させれば横方向の測定ができ、カーソルレール
４をガイドレール５の一定位置に固定しておいてカーソ
ル３のみをカーソルレール４に沿って移動させれば縦方
向の測定ができる。また、カーソル３とカーソルレール
４の移動を並行して行なえば斜め方向への移動も可能で
ある。The movement of the cursor 3 and the cursor rail 4 in the longitudinal and lateral directions with respect to the material to be measured is automatically performed via a predetermined drive mechanism. By fixing the cursor 3 at a fixed position on the cursor rail 4 and moving only the cursor rail 4 along the guide rail 5, measurement in the lateral direction is possible. By moving only the cursor 3 along the cursor rail 4, vertical measurements can be made. Furthermore, if the cursor 3 and the cursor rail 4 are moved in parallel, movement in diagonal directions is also possible.
このように構成された変位測定器は、前記したとおり、
ガイドレール５（５）を介して枠体７（７）に固定され
ており、第１図の実施例では更に、被測定材９を該測定
器にセットするために押え板６を枠体７（７）間に装備
し、かつ枠体７（７）と被測定材との接触を緩和するた
めに枠体７（７）の被測定材９との接触面に緩衝板８（
８）を装着している。As described above, the displacement measuring device configured in this way has the following features:
It is fixed to the frame body 7 (7) via a guide rail 5 (5), and in the embodiment shown in FIG. (7), and a buffer plate 8 (
8) is installed.
変位計１は第２図から明らかなように、針状の先端を有
する検出端１１、検出された変位を歪として受ける板１
２、この歪量を計る歪ゲージ１３、歪受は板１２を保持
する押えブロック１４、および検出作動を行なわせる入
出力コード１５から成る０
検出端１１は微小な変位をも確実に検出するために針状
とされ、被測定材に対して直角方向に２本並行して配列
し、それぞれ歪受は板１２に接続、保持されている。As is clear from FIG. 2, the displacement meter 1 includes a detection end 11 having a needle-like tip, and a plate 1 that receives the detected displacement as strain.
2. The strain gauge 13 measures the amount of strain, the strain receiver consists of a presser block 14 that holds the plate 12, and an input/output cord 15 that performs the detection operation.The detection end 11 is designed to reliably detect even minute displacements. They are shaped like needles, and are arranged in parallel in two directions perpendicular to the material to be measured, and each strain receiver is connected to and held by a plate 12.
歪受は板および歪ゲージは公知のものを使用できる。As the strain receiver, a plate and a known strain gauge can be used.
以上のように構成された本発明の微小変位測定器は被測
定材の平面内を任意に移動するので、亀裂の先端付近お
よびその他不連続に生じた微小変位を高感度で追跡検出
して亀裂伝播挙動の評価を確実にし、かつ作業を簡素化
して能率を向上させる効果を持つ。The micro-displacement measuring device of the present invention configured as described above moves arbitrarily within the plane of the material to be measured, so it can track and detect micro-displacements that occur discontinuously near the tip of a crack with high sensitivity and detect cracks. This has the effect of ensuring the evaluation of propagation behavior, simplifying work, and improving efficiency.
添付図面は本発明の一実施例を示すものであって、第１
図は微小変位測定器の使１［ｊ状態を示す斜視図、第２
図は変位計の拡大側面図である。
１・・・変位側 ２・・・スプリング
３°−ｔｙ−７ル ４・・・カーソルレール５・・・ガ
イドレール
特許出願人 日本原子力研究所
（外４名）The attached drawings show one embodiment of the present invention, and show the first embodiment of the present invention.
The figures are a perspective view showing the micro displacement measuring device in the 1 [j state, and the 2
The figure is an enlarged side view of the displacement meter. 1...Displacement side 2...Spring 3°-ty-7le 4...Cursor rail 5...Guide rail Patent applicant Japan Atomic Energy Research Institute (4 others)
Claims (1)
、針状の検出端を有する変位計と、スプリングを介して
該変位計に連結したカーソル、該カーソルを案内するカ
ーソルレールおよび該カーソルレールな該カーソルの移
動する方向と交叉する方向へ案内するガイドレールを具
備する変位計支持手段とから成る微小変位測定器。A displacement measuring device for material surfaces such as reactor pressure vessels and piping, which includes a displacement meter having a needle-like detection end, a cursor connected to the displacement meter via a spring, a cursor rail that guides the cursor, and a displacement meter that has a needle-like detection end. A minute displacement measuring device comprising a displacement meter supporting means having a guide rail, such as a cursor rail, that guides the cursor in a direction crossing the direction in which the cursor moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21150983A JPS60104201A (en) | 1983-11-10 | 1983-11-10 | Minute displacement measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21150983A JPS60104201A (en) | 1983-11-10 | 1983-11-10 | Minute displacement measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60104201A true JPS60104201A (en) | 1985-06-08 |
Family
ID=16607100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21150983A Pending JPS60104201A (en) | 1983-11-10 | 1983-11-10 | Minute displacement measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60104201A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155440A (en) * | 2005-12-02 | 2007-06-21 | Institute Of Physical & Chemical Research | Apparatus and method for measuring minute force, and probe for measuring micro surface profile |
| JP2008051675A (en) * | 2006-08-25 | 2008-03-06 | Railway Technical Res Inst | Maximum response member angle measuring instrument for elevated bridge post |
-
1983
- 1983-11-10 JP JP21150983A patent/JPS60104201A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155440A (en) * | 2005-12-02 | 2007-06-21 | Institute Of Physical & Chemical Research | Apparatus and method for measuring minute force, and probe for measuring micro surface profile |
| JP2008051675A (en) * | 2006-08-25 | 2008-03-06 | Railway Technical Res Inst | Maximum response member angle measuring instrument for elevated bridge post |
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