JP3529744B2 - Steel plate thickness measuring device - Google Patents
Steel plate thickness measuring deviceInfo
- Publication number
- JP3529744B2 JP3529744B2 JP2001204816A JP2001204816A JP3529744B2 JP 3529744 B2 JP3529744 B2 JP 3529744B2 JP 2001204816 A JP2001204816 A JP 2001204816A JP 2001204816 A JP2001204816 A JP 2001204816A JP 3529744 B2 JP3529744 B2 JP 3529744B2
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- measurement
- thickness
- measuring
- film thickness
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋼板厚測定装置に
係り、特に、原油タンクなどのように表面コーティング
を有するタンクの鋼板の厚さを測定するための装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate thickness measuring device, and more particularly to a device for measuring the steel plate thickness of a tank having a surface coating such as a crude oil tank.
【０００２】[0002]
【従来の技術】鋼板を使用している石油貯蔵のための円
筒タンクの底板については、裏面腐食が予想され、法規
に則ってアニュラー板といわれる底板の円周部は側板か
ら５００ｍｍの範囲について１００ｍｍ間隔の格子の交
点での測定、その他の部位については１ｍ間隔の格子の
交点での測定が行われている。2. Description of the Related Art The bottom plate of a cylindrical tank for oil storage, which uses a steel plate, is expected to be corroded on the back side, and the circumference of the bottom plate, which is called an annular plate in accordance with regulations, is 100 mm in the range of 500 mm from the side plate. The measurement is performed at the intersections of the grids at intervals, and for the other parts, the measurement at the intersections of the grids at intervals of 1 m.
【０００３】上記交点の測定において規制値の評価がで
た箇所については、詳細測定として測定点を中心に半径
約３００ｍｍの範囲を３０ｍｍ間隔の格子点で測定を行
い、評価することになっている。At the point where the regulation value is evaluated in the measurement of the intersection, detailed measurement is performed by measuring at a grid point at intervals of 30 mm in a range of a radius of about 300 mm centering on the measurement point for evaluation. .
【０００４】また、底板は、表面の腐食を防止するため
にガラス素材等によりコーティングがされているために
鋼板厚を計測するために次にような技法により行われて
いる。（１）計測点のコーティングを超音波探触子の大
きさである約３０ｍｍ径の範囲について剥がして、１
点、１点を超音波肉厚計で測定する。
（２）コーティングの上から１点、１点に超音波探傷器
を使用し、表示されたブラウン管の波形から読取る。Further, since the bottom plate is coated with a glass material or the like to prevent the surface from being corroded, the following technique is used to measure the thickness of the steel plate. (1) Peel off the coating of the measurement point in the range of about 30 mm diameter, which is the size of the ultrasonic probe, and
Measure one point with an ultrasonic wall thickness gauge. (2) An ultrasonic flaw detector is used for each one point from the top of the coating, and the waveform is read from the displayed cathode ray tube.
【０００５】図１は超音波探傷器を使用してコーティン
グが施された鋼板の厚さを測定したときの波形を示す。
この波形において図１（ａ）に示すように（イ）はコー
ティングと鋼板の境界による反射波を、（ロ）は鋼板裏
面による１回目の反射波を、（ハ）鋼板裏面の２回目の
反射波をそれぞれ表す。FIG. 1 shows a waveform when the thickness of a coated steel sheet is measured using an ultrasonic flaw detector.
In this waveform, as shown in FIG. 1 (a), (a) is the reflected wave from the boundary between the coating and the steel plate, (b) is the first reflected wave from the back surface of the steel plate, and (c) is the second reflected wave from the back surface of the steel plate. Represents each wave.
【発明が解決しようとする課題】従来行われている上記
の方法（１）にあっては、測定のためにコーティングを
剥がさなければならず、また測定後の測定箇所の修復に
手間がかかる。また、上記方法（２）の場合では、ブラ
ウン管上での目視評価であり、また、上述の図１（ａ）
における(イ)、（ハ）の波形が弱いこともあって誤読が
発生し易いという問題がある。In the above-mentioned method (1) which has been conventionally performed, the coating has to be stripped for the measurement, and it takes a lot of time to repair the measurement spot after the measurement. Further, in the case of the above method (2), it is a visual evaluation on a cathode ray tube, and the above-mentioned FIG.
There is a problem that misreading is likely to occur because the waveforms (a) and (c) in (2) are weak.
【０００６】更に、上述のように、超音波探触子の大き
さより離れた間隔の点ごとの測定のため、測定点間に発
生する局所的な狭いエリアの腐食を見逃すこととなり、
十分な腐食検査とは言い難く、より測定点の密度の濃い
測定が求められるが、その場合、長時間の計測時間を要
するという問題があった。Further, as described above, since the measurement is performed for each point spaced apart from the size of the ultrasonic probe, the local corrosion of the narrow area occurring between the measurement points is missed,
It cannot be said to be a sufficient corrosion inspection, and measurement with a higher density of measurement points is required, but in that case, there was a problem that a long measurement time was required.
【０００７】このようなことからコーティングを剥離し
ないで、測定点密度を上げて腐食状況を見過ごすことが
少なく効率のよい測定手法の開発が求められた。この問
題点を解決する方法として、コーティングの上から超音
波探触子を使用して鋼板の裏面までの厚さを測定し、次
にコーティングの厚さを測定するに適した膜厚計を使用
し、コーティングの厚さを測定し、演算処理して鋼板厚
を算出する方法がある。また、測定点の密度を高くして
容易に測定することができるようにするために、複数の
超音波探触子と膜厚計の複数対を台車に幅方向に並べて
設置し、台車を走行させながら自動的に測定する板厚測
定装置がすでに提案されている。[0007] For this reason, there has been a demand for development of an efficient measuring method in which the coating is not peeled off and the density of measuring points is increased so that the corrosion state is not overlooked. As a method to solve this problem, measure the thickness from the top of the coating to the back surface of the steel sheet using an ultrasonic probe, and then use a film thickness meter suitable for measuring the coating thickness. Then, there is a method of measuring the thickness of the coating and performing arithmetic processing to calculate the steel plate thickness. In addition, in order to increase the density of the measurement points so that measurement can be performed easily, multiple pairs of ultrasonic probes and film thickness meters are installed side by side in the width direction of the carriage and the carriage is run. A plate thickness measuring device that automatically measures while performing the above has already been proposed.
【０００８】台車上に膜厚計と超音波探触子とを組み合
わせて設置して自動的に行う板厚測定装置は測定点密度
や労力の低減といった点から利点があるものの、板厚の
精密測定といった観点からはさらに改良すべき点が残さ
れている。即ち、コーティングの施されたタンク底板
は、コーティングの凹凸などにより底板表面は必ずしも
平坦な面ではなく、このような凹凸は膜厚の測定誤差を
生み、結果的に板厚の正確な測定に支障を来たすことが
ある。本発明は、これらの問題を解決しつつ自動測定に
適した板厚測定装置を提供することを目的とするもので
ある。A plate thickness measuring device that is automatically installed by combining a film thickness meter and an ultrasonic probe on a trolley has advantages in that the density of measuring points and labor are reduced, but the plate thickness is accurate. From the point of view of measurement, there are still points to be improved. In other words, the surface of the coated tank bottom plate is not necessarily a flat surface due to the unevenness of the coating, and such unevenness causes an error in the measurement of the film thickness, and as a result hinders the accurate measurement of the plate thickness. I may come. It is an object of the present invention to provide a plate thickness measuring device suitable for automatic measurement while solving these problems.
【課題を解決するための手段】図２は上述の測定装置を
使用する板厚測定の原理を示す。FIG. 2 shows the principle of plate thickness measurement using the above-mentioned measuring device.
【０００９】ここでは、コーティングの厚さ測定用の電
磁膜厚計１と超音波探触子２を組み合わせて使用してい
る。Here, the electromagnetic film thickness meter 1 for measuring the coating thickness and the ultrasonic probe 2 are used in combination.
【００１０】図２に示すように、コーティング厚さの測
定は電磁膜厚計１が鋼板までの距離、即ち、コーティン
グの厚さＡ’を測定し、超音波探触子２は、コーティン
グ表面から鋼板裏面までの距離Ａを測定する。As shown in FIG. 2, the coating thickness is measured by the electromagnetic film thickness meter 1 measuring the distance to the steel plate, that is, the coating thickness A ', and the ultrasonic probe 2 is measured from the coating surface. The distance A to the back surface of the steel plate is measured.
【００１１】従って、板厚ＤはＤ＝Ａ−Ａ’により求め
ることができる。超音波探触子２は、ここでは送信振動
子２ａと受信振動子２ｂを一体にモールドした分割型の
ものが使用される。なお、電磁膜厚計１と超音波探触子
２とは台車(図示せず)に支持され、進行方向（図２の矢
印方向：図上水平方向）に対して一定の間隔Ｌを置いて
同時に移動するようにされている。Therefore, the plate thickness D can be obtained by D = A-A '. The ultrasonic probe 2 used here is of a split type in which a transmission oscillator 2a and a reception oscillator 2b are integrally molded. In addition, the electromagnetic film thickness meter 1 and the ultrasonic probe 2 are supported by a carriage (not shown), with a constant distance L from the traveling direction (arrow direction in FIG. 2: horizontal direction in the figure). It is supposed to move at the same time.
【００１２】超音波探触子及び膜厚センサのいずれも、
コーティング表面の凹凸に追従するためにはできるだけ
小さい方が良い。また、超音波探触子及び膜厚センサの
２種類のセンサ部がコーティング表面に接する面積は凹
凸の追従性から同じであることが望ましい。しかし、超
音波探触子は大きく、膜厚センサは小さい。Both the ultrasonic probe and the film thickness sensor,
In order to follow the unevenness of the coating surface, it is better to be as small as possible. Further, it is desirable that the areas in which the two types of sensor portions, that is, the ultrasonic probe and the film thickness sensor, are in contact with the coating surface are the same in terms of the followability of unevenness. However, the ultrasonic probe is large and the film thickness sensor is small.
【００１３】図３はこれら超音波探触子と膜厚センサの
凹凸のある測定面への追従性を説明するものである。FIG. 3 illustrates the ability of the ultrasonic probe and the film thickness sensor to follow an uneven measurement surface.
【００１４】図３（ａ）はセンサ部の大小によるコーテ
ィングの凹凸に位置する測定に誤差が生じることを示し
ている。図３（ｂ）は、超音波探触子と膜厚センサの枠
体を小さくすることで、この誤差をできるだけ小さくで
きる測定を示している。膜厚計１の測定値はＢ’、
Ｃ’、超音波探触子２の測定値がＢ、Ｃのとき、それぞ
れ、板厚Ｄ１はＤ１＝B−Ｂ’、板厚Ｄ２はＤ２＝Ｃ−
Ｃ’で求めることができる。なお、測定値の演算は同一
の点における測定値に基づいて行う必要があり、進行に
伴う測定値の一致は、距離用のエンコーダ（図示せず）
に基づいて行う。FIG. 3A shows that an error occurs in the measurement located on the unevenness of the coating depending on the size of the sensor section. FIG. 3B shows a measurement in which this error can be made as small as possible by making the frames of the ultrasonic probe and the film thickness sensor small. The measured value of the film thickness meter 1 is B ',
When C ′ and the measured values of the ultrasonic probe 2 are B and C, the plate thickness D1 is D1 = BB ′, and the plate thickness D2 is D2 = C−, respectively.
It can be obtained by C '. It should be noted that the calculation of the measured values must be performed based on the measured values at the same point, and the coincidence of the measured values with the progress is determined by a distance encoder (not shown).
Based on.
【００１５】仮に、図３（ｃ）に示すように、超音波探
触子（イ）と膜厚センサ（ロ）とが一体に支持されてい
ると、同一測定位置でありながら膜厚センサのコーティ
ング面への接触が超音波探触子の凹凸面への接触に影響
を受けて傾斜することとなり、正確なコーティングの厚
さを測定することができない。また、逆に、超音波探触
子の接触においても、膜厚センサ部の影響を受けて適切
な接触とならない。If the ultrasonic probe (a) and the film thickness sensor (b) are integrally supported as shown in FIG. 3 (c), the film thickness sensor of the film thickness sensor can be operated at the same measurement position. The contact with the coating surface is affected by the contact with the uneven surface of the ultrasonic probe and is inclined, so that the thickness of the coating cannot be accurately measured. On the contrary, even when the ultrasonic probe is contacted, it is not properly contacted due to the influence of the film thickness sensor unit.
【００１６】これに対して図３（ｄ）に示すように膜厚
センサ（ロ）は超音波探触子（イ）とは独立してコーテ
ィング凹凸面に追随し、しかも、膜厚センサ（ロ）は垂
直方向の上下動のみに移動できるように支持しているた
め、常にコーティングの厚さをより正確に測定すること
が可能となる。On the other hand, as shown in FIG. 3 (d), the film thickness sensor (b) follows the uneven surface of the coating independently of the ultrasonic probe (a), and the film thickness sensor (b) Since) is supported so that it can move only in vertical movements in the vertical direction, it is always possible to measure the coating thickness more accurately.
【００１７】また、小さいほうの膜厚センサを大きい超
音波探触子と大きさの同じ枠体に収容し、同一追従機構
とする方法もあるが、大きくすることによる弊害も生じ
る。本願請求項１の発明は、鋼板上を走行する測定台車
と、前記測定台車に支持された鋼板の厚さを測定するた
めの複数の超音波探触子と鋼板上のコーティングの厚さ
を測定する複数の電磁膜厚計と、測定台車の走行距離を
測定するロータリエンコーダとを有し、前記超音波探触
子は、前記測定台車の進行方向に対し横方向に前後２列
にそれぞれ複数配置され、かつ上下動およびコーティン
グの凹凸面に追従して回動可能とされた支持機構に支持
され、前記電磁膜厚計は前記測定台車の進行方向に対し
前記２列に配列された超音波探触子の間で横方向に配置
され、かつ上下動のみ移動可能とされた支持機構に支持
されたことを特徴とする鋼板厚測定装置である。There is also a method in which the smaller film thickness sensor is housed in a frame having the same size as that of the larger ultrasonic probe so as to have the same follow-up mechanism. The invention according to claim 1 of the present application measures the thickness of a measurement carriage that travels on a steel plate, a plurality of ultrasonic probes for measuring the thickness of the steel plate supported by the measurement carriage, and the coating on the steel plate. A plurality of electromagnetic film thickness meters and a rotary encoder for measuring the travel distance of the measuring carriage, and the ultrasonic probes are arranged in a plurality of rows in front and rear in a direction transverse to the traveling direction of the measuring carriage. And is supported by a support mechanism that is vertically movable and can follow the uneven surface of the coating and is rotatable, and the electromagnetic film thickness meter with respect to the traveling direction of the measurement carriage.
The steel sheet thickness measuring device is characterized in that it is supported laterally between the ultrasonic probes arranged in two rows and is supported by a support mechanism that is movable only up and down.
【００１８】本発明の鋼板厚測定装置は、測定対象であ
る鋼板上を走行しつつ、鋼板上のコーティング表面から
鋼板の底部までの距離を超音波探触子による測定データ
により取得する。また、鋼板上のコーティング層の厚さ
を膜厚計により取得する。これらの超音波探触子と膜厚
計の測定データを基に鋼板の厚さを算出する。超音波探
触子と膜厚計とはそれぞれ独立して支持され、超音波探
触子は上下動及び回動自在に支持されコーティングの凹
凸面に追従して移動する。また、膜厚計は上下動のみ可
動とされ、膜厚の正確な測定を可能とする。また、ロー
タリエンコーダにより測定台車の移動量を測定し測定デ
ータを測定位置とともに表示することが可能となる。ま
た、超音波探触子と膜厚計のデータ処理における測定点
の一致をロータリエンコーダによる測定台車の移動量に
より行う。The steel plate thickness measuring device of the present invention travels on the steel plate to be measured and acquires the distance from the coating surface on the steel plate to the bottom of the steel plate by the measurement data by the ultrasonic probe. Also, the thickness of the coating layer on the steel plate is acquired by a film thickness meter. The thickness of the steel sheet is calculated based on the measurement data of these ultrasonic probe and film thickness meter. The ultrasonic probe and the film thickness meter are supported independently of each other, and the ultrasonic probe is supported so as to be vertically movable and rotatable, and moves following the uneven surface of the coating. Further, the film thickness meter is movable only up and down, which enables accurate measurement of the film thickness. Further, it becomes possible to measure the amount of movement of the measurement carriage by the rotary encoder and display the measurement data together with the measurement position. Further, the measurement points in the data processing of the ultrasonic probe and the film thickness meter are matched by the movement amount of the measurement carriage by the rotary encoder.
【００１９】請求項２の発明は、前記超音波探触子を支
持する支持機構は、垂直方向に上下動可能な支持棒に固
定された支持ブロックと、超音波探触子を第１の軸を中
心に回動可能に支持する枠体とを有し、該枠体は前記支
持ブロックに対し、第２の軸を中心に回動可能に支持さ
れ、前期第１の軸と前記第２の軸は鋼板に対して平行で
互いに直交する関係にあることを特徴としている。According to a second aspect of the present invention, the support mechanism for supporting the ultrasonic probe includes a support block fixed to a vertically movable support rod, and the ultrasonic probe having a first shaft. And a frame body that is rotatably supported about the center of the frame. The frame body is rotatably supported by the support block about a second axis, and the first axis and the second axis are provided. The axis is parallel to the steel sheet and is orthogonal to each other.
【００２０】本発明においては、超音波探触子は垂直方
向の上下動、及び第１、第２の軸に対して回動自在とな
り、コーティング上の凹凸面に対して効果的に追従す
る。In the present invention, the ultrasonic probe is vertically movable in the vertical direction and rotatable about the first and second axes, and effectively follows the uneven surface on the coating.
【００２１】請求項３の発明は、請求項１に記載の鋼板
厚測定装置において、膜厚計の支持機構を上下動及びコ
ーティングの凹凸面に追従して回動可能とされた支持機
構に替えて支持させたことを特徴とする。According to a third aspect of the present invention, in the steel plate thickness measuring apparatus according to the first aspect, the support mechanism of the film thickness meter is replaced with a support mechanism which is vertically movable and can be rotated following the uneven surface of the coating. It is characterized by being supported.
【００２２】請求項３の発明は、膜厚計の走行表面の凹
凸状況により、超音波探触子と同一支持機構が有効なこ
ともある。In the third aspect of the invention, the same support mechanism as the ultrasonic probe may be effective depending on the unevenness of the running surface of the film thickness meter.
【００２３】請求項４の発明は、前記測定台車の側部に
前記測定台車がタンク側板に沿って走行するためのガイ
ドローラが設けられたことを特徴とする。ガイドローラ
によりタンク側壁に沿って測定台車を走行させることに
より、タンク側壁から円弧になる所定範囲を測定を測定
することが容易となる。The invention of claim 4 is characterized in that a guide roller is provided on a side portion of the measuring carriage for allowing the measuring carriage to travel along a tank side plate. By running the measuring carriage along the side wall of the tank by the guide roller, it becomes easy to measure the predetermined range that is an arc from the side wall of the tank.
【００２４】[0024]
【発明の実施の形態】以下には本発明をより詳細に説明
するために図面を用いて本発明の実施例を説明する。Embodiments of the present invention will be described below with reference to the drawings in order to explain the present invention in more detail.
【００２５】図４は、本発明による鋼板厚測定装置の機
能構成図である。鋼板厚測定測定装置１０は、センサユ
ニット２０と解析ユニット３０とから構成される。セン
サユニット２０は、複数（ここでは１６個を想定）の超
音波探触子２１と、複数（１６個）の膜厚計センサ２２
とを備える。膜厚センサ２２は例えば前述の電磁膜厚セ
ンサでＦＲＰなどの薄いコーティングの層厚を測定する
のに好適である。センサユニット２０は、また、各超音
波探触子２１へパルスを供給し、また、受信したパルス
を検知信号として受信する複数（ここでは１６個）チャ
ンネルパルサーレシーバ２３を有し、また、複数（ここ
では１６個）の膜厚センサ２２からの信号を受信し膜厚
測定の信号として出力する膜厚計アンプ２４を備え、ま
た、センサユニット２０はロータリエンコーダ２５を備
えており、センサユニット２０が設置される台車(図
５、４０参照)の移動量を測定し、超音波探触子２１と
膜厚センサ２２の測定位置の一致を行うためのデータと
する。FIG. 4 is a functional block diagram of the steel sheet thickness measuring device according to the present invention. The steel plate thickness measuring / measuring device 10 includes a sensor unit 20 and an analysis unit 30. The sensor unit 20 includes a plurality (16 here) of ultrasonic probes 21 and a plurality (16) of film thickness gauge sensors 22.
With. The film thickness sensor 22 is suitable for measuring the layer thickness of a thin coating such as FRP with the aforementioned electromagnetic film thickness sensor. The sensor unit 20 also has a plurality of (here, 16) channel pulsar receivers 23 that supply pulses to each ultrasonic probe 21 and that receive the received pulses as detection signals. The sensor unit 20 includes a film thickness gauge amplifier 24 that receives signals from 16 film thickness sensors 22 and outputs the signals as a film thickness measurement signal. The sensor unit 20 includes a rotary encoder 25. The amount of movement of the carriage (see FIGS. 5 and 40) to be installed is measured and used as data for matching the measurement positions of the ultrasonic probe 21 and the film thickness sensor 22.
【００２６】解析ユニット３０は、超音波パルスレシー
バ２３からのパルス信号を受けて超音波探触子から鋼板
の底部までの距離（コーティング層の厚みと鋼板の厚
み）を測定し、その測定値をパソコン３２に送出する。
パソコン３２は、超音波探傷器３１から送られたデータ
とそれぞれ対応する膜厚計アンプから送られるデータと
から前述の演算を行い鋼板厚のデータを算出し、パソコ
ンモニタ３３に表示する。The analysis unit 30 receives the pulse signal from the ultrasonic pulse receiver 23 and measures the distance from the ultrasonic probe to the bottom of the steel plate (the thickness of the coating layer and the thickness of the steel plate), and the measured value is measured. It is sent to the personal computer 32.
The personal computer 32 performs the above-mentioned calculation from the data sent from the ultrasonic flaw detector 31 and the data sent from the corresponding film thickness gauge amplifiers to calculate the steel plate thickness data, and displays it on the personal computer monitor 33.
【００２７】図５は上記の鋼板厚測定装置１０の概略構
成図であり、（ａ）は平面図を、（ｂ）は側面図を示
す。鋼板厚測定装置１０は、３つの台車、即ち、連結さ
れている測定台車４０と装置台車５０、及び測定制御台
車６０によって構成している。測定台車４０は4個の車
輪４２を有する支持台４１を備え、その支持台４１に
は、進行方向に対して前側に８個の超音波探触子２１
ａ、後ろ側に8個の超音波探触子２１ｂ、計１６個の超
音波探触子２１が2列に整列して配置されている。2列に
配置された超音波探触子２１の間には一列状に膜厚セン
サ２２が配置されている。なお、2列に配列された超音
波探触子２１ａ，２１ｂは、図５（ａ）に示されるよう
に左右に互いにその範囲が重なるように配置されてい
る。図６はこの関係を詳細に説明するもので、進行方向
（矢印）に対して、左右の幅方向に互いに重なり部分Ｗ
が生じるように配置されている。これにより台車４０を
走行させて厚さ測定を行う場合、測定箇所のもれをなく
すようにしている。FIG. 5 is a schematic configuration diagram of the steel plate thickness measuring device 10 described above, in which (a) is a plan view and (b) is a side view. The steel plate thickness measuring device 10 includes three carriages, that is, a measurement carriage 40, a device carriage 50, and a measurement control carriage 60 that are connected to each other. The measurement carriage 40 includes a support base 41 having four wheels 42, and the support base 41 has eight ultrasonic probes 21 on the front side in the traveling direction.
a, eight ultrasonic probes 21b on the rear side, and a total of 16 ultrasonic probes 21 are arranged in two rows. The film thickness sensors 22 are arranged in a line between the ultrasonic probes 21 arranged in two lines. The ultrasonic probes 21a and 21b arranged in two rows are arranged so that the ranges thereof overlap left and right as shown in FIG. 5 (a). FIG. 6 illustrates this relationship in detail. The overlapping portions W in the left-right width direction with respect to the traveling direction (arrow) are overlapped with each other.
Are arranged so that Thus, when the trolley 40 is run and the thickness is measured, the measurement point is not leaked.
【００２８】測定台車４０は、また、前述のロータリエ
ンコーダ（移動距離測定部）２５を備えている。ロータ
リエンコーダ２５は測定台車の移動量を測定し、測定位
置の表示と後述する超音波探触子と膜厚センサの測定位
置の一致の処理に使用される。The measuring carriage 40 also includes the rotary encoder (moving distance measuring unit) 25 described above. The rotary encoder 25 measures the amount of movement of the measurement carriage, and is used for displaying the measurement position and processing for matching the measurement positions of the ultrasonic probe and the film thickness sensor described later.
【００２９】そして、さらに、ノズル４３を有し、ノズ
ル４３には水タンク４５から水供給ポンプ４６によりホ
ース４７を経由して超音波測定時に必要な接触媒質であ
る水が供給され、測定面に水が供給される。なお、水タ
ンク４５及び水供給ポンプ４６は台車(図示せず)により
移動可能に支持されている。Further, a nozzle 43 is further provided, and the nozzle 43 is supplied with water, which is a contact medium necessary for ultrasonic measurement, from a water tank 45 by a water supply pump 46 via a hose 47, and the measured surface is Water is supplied. The water tank 45 and the water supply pump 46 are movably supported by a carriage (not shown).
【００３０】測定台車４０の後方には装置台車５０が連
結されている。装置台車５０は装置台車本体５１と一対
の車輪５２を有し、測定台車４０とは連結具５３により
連結されている。装置台車本体５１には超音波パルサー
レシーバ２３、電磁膜厚計制御部２４が設置されてい
る。A device carriage 50 is connected to the rear of the measuring carriage 40. The apparatus carriage 50 has an apparatus carriage body 51 and a pair of wheels 52, and is connected to the measurement carriage 40 by a connecting tool 53. An ultrasonic pulser receiver 23 and an electromagnetic film thickness meter control unit 24 are installed in the apparatus carriage main body 51.
【００３１】図７及び図８は測定台車４０の超音波探触
子２１及び膜厚センサ２２の支持構造の拡大詳細図であ
る。図７（ａ）は平面図、（ｂ）は側面図、図８は超音
波探触子を支持する支持構造の詳細図である。FIG. 7 and FIG. 8 are enlarged detailed views of the supporting structure of the ultrasonic probe 21 and the film thickness sensor 22 of the measuring carriage 40. FIG. 7A is a plan view, FIG. 7B is a side view, and FIG. 8 is a detailed view of a support structure that supports the ultrasonic probe.
【００３２】図７に示すように、前後の超音波探触子２
１ａ，２１ｂは夫々膜厚センサ２２が対応して配列され
て支持台４１に取り付けられている。超音波探触子２１
は鋼板表面に対し上下動及び水平面上の互い直交する軸
に対して回動自在なジンバル支持機構７０により支持さ
れている。図８はこのジンバル機構支持構造の詳細を示
す。ジンバル支持機構７０は、超音波探触子２１を支持
するための平面視コ字状の枠体７１、この枠体７１を支
持する支持ブロック７２、支持ブロック７２を支持台４
１に対しスプリング７４を介して上下動可能に支持する
支持棒７３とから構成されている。枠体７１の下部には
測定対象である鋼板上を摺動するシュウ７１ａを有して
いる。そして、枠体７１は超音波探触子２１を回動可能
に支持する軸７１ｂを有する。これにより超音波探触子
２１は枠体７１に対し、図矢印（ロ）で示す方向に軸７
１ｂ（第１の軸）により軸に中心に回動自在に支持され
る。一方、枠体７１は支持ブロック７２に対しては支持
ブロック７１に設けられる軸７２ａにより軸７２ａ（第
２の軸）を中心に矢印（ハ）に示す方向に回動自在に支
持される。したがって、支持台４１に支持棒７３、支持
ブロック７２を介して取り付けられた枠体７１は上下動
可能、軸７１ｂ，軸７２ａを中心に回動自在に支持され
ることとなる。したがって、枠体に支持される超音波探
触子２１は鋼板面に対して上下動と水平軸に対して回動
自在に接すことが可能となり、測定面の凹凸に追従して
測定面に沿って移動することが可能となる。As shown in FIG. 7, front and rear ultrasonic probes 2
The film thickness sensors 22 are arranged corresponding to 1a and 21b, and are attached to the support base 41. Ultrasonic probe 21
Is supported by a gimbal support mechanism 70 that is vertically movable with respect to the surface of the steel plate and is rotatable about axes that are orthogonal to each other on a horizontal plane. FIG. 8 shows the details of the gimbal mechanism supporting structure. The gimbal support mechanism 70 includes a U-shaped frame 71 for supporting the ultrasonic probe 21, a support block 72 for supporting the frame 71, and a support block 72 for supporting the support block 72.
1 and a support rod 73 that supports the first unit via a spring 74 so as to be vertically movable. At the lower part of the frame 71, there is a shoe 71a that slides on the steel plate to be measured. The frame 71 has a shaft 71b that rotatably supports the ultrasonic probe 21. As a result, the ultrasonic probe 21 moves toward the shaft 71 in the direction indicated by the arrow (b) in the figure with respect to the frame 71.
A shaft 1b (first shaft) rotatably supports the shaft. On the other hand, the frame 71 is supported on the support block 72 by a shaft 72a provided on the support block 71 so as to be rotatable about a shaft 72a (second shaft) in a direction indicated by an arrow (C). Therefore, the frame 71 attached to the support base 41 via the support rod 73 and the support block 72 is vertically movable and is supported rotatably about the shaft 71b and the shaft 72a. Therefore, the ultrasonic probe 21 supported by the frame can be vertically movable with respect to the steel plate surface and can be rotatably contacted with the horizontal axis, and can follow the unevenness of the measurement surface to reach the measurement surface. It is possible to move along.
【００３３】尚、測定台車４０の側部には一対の円弧ガ
イドローラ４８が設けられており、測定台車４０がタン
ク内のタンク側板に沿って移動する場合、タンク側壁に
当接し、タンク側板に沿って走行する場合のガイドとな
る。A pair of arc guide rollers 48 are provided on the sides of the measuring carriage 40. When the measuring carriage 40 moves along the tank side plate in the tank, it abuts the tank side wall and the tank side plate contacts the tank side plate. It serves as a guide when traveling along.
【００３４】次に、電磁膜厚計２２の支持構造について
説明すると、図７（ｂ）に示すように、電磁膜厚計２２
は支持台４１に対して支持棒７５によりスプリング７６
を介して上下動可能に支持されている。Next, the support structure of the electromagnetic film thickness meter 22 will be described. As shown in FIG.
The support rod 75 supports the spring 76 against the support base 41.
It is supported so as to be vertically movable via.
【００３５】上述のように、前後の列の超音波探触子２
１が上下動、及び回動自在に、また、中間位置に配置さ
れる電磁膜厚計２２が上下動のみに移動可能に支持され
ていることにより、超音波探触子２１と電磁膜厚計２２
とは測定面の変化に応じて異なった動きをする。As described above, the ultrasonic probes 2 in the front and rear rows
1 is vertically movably and rotatably supported, and the electromagnetic film thickness meter 22 arranged at an intermediate position is movably supported only vertically, so that the ultrasonic probe 21 and the electromagnetic film thickness meter are supported. 22
And move differently depending on the change of the measurement surface.
【００３６】本実施例の鋼板厚測定装置にあっては測定
台車４０の支持台４１に前後２列状に計16個の超音波探
触子２１を、中央列に16個の膜厚センサ２２を配列し、
それぞれの超音波探触子は独立してジンバル機構により
上下及び回動自在に支持され、膜厚センサはそれぞれが
独立して上下動可能に支持されている。In the steel sheet thickness measuring apparatus of this embodiment, a total of 16 ultrasonic probes 21 are arranged in two rows in the front and rear on the support base 41 of the measurement carriage 40, and 16 film thickness sensors 22 are arranged in the central row. Array
Each ultrasonic probe is independently supported by a gimbal mechanism so as to be vertically and rotatably supported, and the film thickness sensors are independently supported so as to be vertically movable.
【００３７】以上の構成を有する本実施例の鋼板厚測定
装置１０を、例えば、測定すべき石油タンクの内部底面
上を走行させ、各測定点の測定データをリアルタイムで
得ることができ、測定データをパソコンモニター３３上
に表示させることができる。この場合、ロータリエンコ
ーダ２５により把握される測定点と同時に表示され、必
要に応じて、測定間隔を任意に指定して測定することも
可能となる。また、ロータリエンコーダからの測定位置
のデータは、前述のように、超音波探触子のデータと膜
厚センサのデータとの測定点を一致させるためにも使用
される。これらの処理はパソコン３２により演算処理さ
れる。The steel sheet thickness measuring apparatus 10 of the present embodiment having the above-mentioned configuration is run on the inner bottom surface of the oil tank to be measured, and the measurement data at each measurement point can be obtained in real time. Can be displayed on the personal computer monitor 33. In this case, it is displayed at the same time as the measurement points grasped by the rotary encoder 25, and it is also possible to arbitrarily specify the measurement interval and perform the measurement if necessary. Further, the measurement position data from the rotary encoder is also used to match the measurement points of the ultrasonic probe data and the film thickness sensor data, as described above. These processes are calculated by the personal computer 32.
【００３８】尚、上述の例ではコーティングの膜厚の測
定手段として電磁膜厚計を使用した例を示したが、膜厚
計としてはこれに限ることなく、薄層の厚さを精度高く
表面を走査しながら測定できるものであれば他の方式、
例えば、磁気式、超音波式でも採用できる。In the above example, an electromagnetic film thickness meter was used as a means for measuring the film thickness of the coating, but the thickness meter is not limited to this, and the thickness of the thin layer can be measured with high accuracy. If you can measure while scanning, other methods,
For example, a magnetic type or an ultrasonic type can also be adopted.
【００３９】以上、本実施例に記載した鋼板厚測定装置
によれば、コーティングを剥がすことなく、一回の装置
の進行方向走査で所定範囲幅の測定が可能となり、その
際、超音波探触子をその測定範囲を幅方向に重複させる
ように配置しているため、鋼板上をもれなく走査し、測
定データを得ることができる。As described above, according to the steel plate thickness measuring device described in this embodiment, it is possible to measure a predetermined range width by one scanning of the traveling direction of the device without peeling off the coating. Since the child is arranged so that the measurement ranges thereof overlap in the width direction, it is possible to scan the steel plate without exception and obtain the measurement data.
【００４０】以上本発明の好ましい実施例について詳述
したが、本発明は係る特定の実施形態に限定されるもの
ではなく、特許請求の範囲に記載された本発明の要旨の
範囲内において、種々の変形・変更が可能である。Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications are possible within the scope of the gist of the present invention described in the claims. Can be modified and changed.
【００４１】[0041]
【発明の効果】以上詳述したところから明らかなよう
に、本発明によれば、コーティングが施された鋼板の厚
さを高い測定点密度で容易い測定することが可能とな
る。また、コーティング表面から鋼板底面までの距離を
測定する超音波探触子とコーティングの膜厚のみを測定
する膜厚計とを列状に配列し、それぞれを独立して支持
させているために、コーティングに凹凸が存在する場合
であっても、正確な鋼板厚の測定が可能となる。As is apparent from the above detailed description, according to the present invention, it becomes possible to easily measure the thickness of the coated steel sheet at a high measurement point density. Further, the ultrasonic probe for measuring the distance from the coating surface to the bottom surface of the steel plate and the film thickness meter for measuring only the film thickness of the coating are arranged in a row, and each is supported independently. Even if the coating has irregularities, the steel plate thickness can be accurately measured.
【図１】超音波探傷器を利用した鋼板の厚さ測定の原理
を説明する図である。FIG. 1 is a diagram illustrating the principle of steel plate thickness measurement using an ultrasonic flaw detector.
【図２】超音波探触子と膜厚計とを使用する鋼板厚の測
定原理を説明する図である。FIG. 2 is a diagram for explaining the principle of steel plate thickness measurement using an ultrasonic probe and a film thickness meter.
【図３】コーティング上の凹凸面における超音波探触子
と膜厚計の追従状態を説明する図である。FIG. 3 is a diagram for explaining a tracking state of an ultrasonic probe and a film thickness meter on an uneven surface on a coating.
【図４】本発明による鋼板厚測定装置の機能構成図であ
る。FIG. 4 is a functional configuration diagram of a steel sheet thickness measuring device according to the present invention.
【図５】本発明の実施例に係る鋼板厚測定装置の構成図
である。（ａ）は平面図、（ｂ）は側面図である。FIG. 5 is a configuration diagram of a steel plate thickness measuring device according to an embodiment of the present invention. (A) is a plan view and (b) is a side view.
【図６】超音波探触子の配置の説明図である。FIG. 6 is an explanatory diagram of an arrangement of ultrasonic probes.
【図７】測定台車の超音波探触子と膜厚センサとの支持
機構を説明する図である。FIG. 7 is a diagram illustrating a support mechanism for an ultrasonic probe and a film thickness sensor of a measurement carriage.
【図８】超音波探触子の支持機構の詳細図である。FIG. 8 is a detailed view of a support mechanism of the ultrasonic probe.
１０ 鋼板厚測定装置 ２０ センサユニット ３０ 解析ユニット ２１ 超音波探触子 ２２ 膜厚センサ ２５ ロータリエンコーダ ４０ 測定台車 ４１ 支持台 ４８ ガイドローラ ５０ 装置台車 ６０ 測定制御台車 ７０ ジンバル支持機構 10 Steel plate thickness measuring device 20 sensor unit 30 analysis units 21 Ultrasonic probe 22 Thickness sensor 25 rotary encoder 40 measuring trolley 41 Support 48 guide roller 50 equipment trolley 60 measurement control cart 70 Gimbal support mechanism
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−65618（ＪＰ，Ａ) 特開 平11−19890（ＪＰ，Ａ) 特開2001−50736（ＪＰ，Ａ) 実開 平５−8415（ＪＰ，Ｕ) 実開 平３−110303（ＪＰ，Ｕ) 米国特許5440929（ＵＳ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01B 21/08 G01B 17/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-65618 (JP, A) JP-A-11-19890 (JP, A) JP-A-2001-50736 (JP, A) Actual Kaihei 5-8415 (JP, U) Actual Kaihei 3-110303 (JP, U) US Patent 5440929 (US, A) (58) Fields investigated (Int.Cl. 7 , DB name) G01B 21/08 G01B 17/02
Claims (4)
台車に支持された鋼板の厚さを測定するための複数の超
音波探触子と鋼板上のコーティングの厚さを測定する複
数の電磁膜厚計と、測定台車の走行距離を測定するロー
タリエンコーダとを有し、 前記超音波探触子は、前記測定台車の進行方向に対し横
方向に前後２列にそれぞれ複数配置され、かつ上下動お
よびコーティングの凹凸面に追従して回動可能とされた
支持機構に支持され、 前記電磁膜厚計は前記測定台車の進行方向に対し前記２
列に配列された超音波探触子の間で横方向に配置され、
かつ上下動のみ移動可能とされた支持機構に支持された
ことを特徴とする鋼板厚測定装置。1. A measuring carriage that travels on a steel plate, a plurality of ultrasonic probes for measuring the thickness of the steel plate supported by the measuring carriage, and a plurality of measuring probes that measure the thickness of the coating on the steel plate. An electromagnetic film thickness meter and a rotary encoder for measuring the travel distance of the measurement carriage are provided, and the ultrasonic probes are arranged in a plurality of rows in front and rear in a direction transverse to the traveling direction of the measurement carriage, and to follow the uneven surface of the vertical movement and coating supported by a supporting mechanism which is rotatable, said electromagnetic thickness meter is the relative moving direction of the measuring cart 2
Arranged laterally between the ultrasound probes arranged in rows ,
A steel plate thickness measuring device characterized by being supported by a support mechanism that is movable only in vertical movement.
は、垂直方向に上下動可能な支持棒に固定された支持ブ
ロックと、超音波探触子を第１の軸を中心に回動可能に
支持する枠体とを有し、該枠体は前記支持ブロックに対
し、第２の軸を中心に回動可能に支持され、前期第１の
軸と前記第２の軸は鋼板に対して平行で互いに直交する
関係にある請求項１に記載の鋼板厚測定装置。2. A support mechanism for supporting the ultrasonic probe comprises a support block fixed to a vertically movable support rod, and the ultrasonic probe rotating about a first axis. And a frame body that supports the frame body. The frame body is supported by the support block so as to be rotatable around a second shaft, and the first shaft and the second shaft are connected to a steel plate. The steel sheet thickness measuring device according to claim 1, wherein the steel sheet thickness measuring devices are in parallel with each other and are orthogonal to each other.
て、膜厚計の支持機構を上下動及びコーティングの凹凸
面に追従して回動可能とされた支持機構に替えて支持さ
せた鋼板厚測定装置。3. The steel plate thickness measuring device according to claim 1, wherein the support mechanism of the film thickness meter is replaced by a support mechanism that is rotatable in accordance with vertical movement and the uneven surface of the coating. Thickness measuring device.
ンク側板に沿って走行するためのガイドローラが設けら
れた請求項１に記載の鋼板厚測定装置。4. The steel plate thickness measuring device according to claim 1, wherein a guide roller is provided on a side portion of the measurement carriage for the measurement carriage to travel along a tank side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204816A JP3529744B2 (en) | 2001-07-05 | 2001-07-05 | Steel plate thickness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204816A JP3529744B2 (en) | 2001-07-05 | 2001-07-05 | Steel plate thickness measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003021509A JP2003021509A (en) | 2003-01-24 |
| JP3529744B2 true JP3529744B2 (en) | 2004-05-24 |
Family
ID=19041226
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001204816A Expired - Lifetime JP3529744B2 (en) | 2001-07-05 | 2001-07-05 | Steel plate thickness measuring device |
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| Country | Link |
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| JP (1) | JP3529744B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7484413B2 (en) * | 2003-12-12 | 2009-02-03 | The Boeing Company | Remote radius inspection tool for composite joints |
| CN103175568A (en) * | 2013-03-19 | 2013-06-26 | 上海大学 | Testing device for high-speed encoder |
| JP6189395B2 (en) * | 2015-10-20 | 2017-08-30 | 株式会社フジエンジニアリング | Film thickness measuring device |
| JP6723634B2 (en) * | 2016-01-20 | 2020-07-15 | 三菱重工業株式会社 | Gap measuring device and gap measuring method |
| CN105606044B (en) * | 2016-03-11 | 2017-11-07 | 浙江工业大学 | A kind of device for being capable of continuous on-line detection thickness of strips |
| CN105716499A (en) * | 2016-04-14 | 2016-06-29 | 力帆实业(集团)股份有限公司 | Motorcycle fuel tank detection device and method |
| CN113324501A (en) * | 2021-05-31 | 2021-08-31 | 东风商用车有限公司 | Multi-probe ultrasonic thickness measuring device |
| CN114562934A (en) * | 2022-01-13 | 2022-05-31 | 浙江交工集团股份有限公司 | Be applicable to steel bridge floor EA-10 thickness check out test set |
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2001
- 2001-07-05 JP JP2001204816A patent/JP3529744B2/en not_active Expired - Lifetime
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| JP2003021509A (en) | 2003-01-24 |
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