JPS6158768B2 - - Google Patents
Info
- Publication number
- JPS6158768B2 JPS6158768B2 JP12469180A JP12469180A JPS6158768B2 JP S6158768 B2 JPS6158768 B2 JP S6158768B2 JP 12469180 A JP12469180 A JP 12469180A JP 12469180 A JP12469180 A JP 12469180A JP S6158768 B2 JPS6158768 B2 JP S6158768B2
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- propeller
- present
- measurement pin
- measurement
- 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
Links
- 238000005259 measurement Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2416—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures of gears
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は水中翼，プロペラ等のキヤビテイ厚さ
測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cavity thickness measuring device for hydrofoils, propellers, etc.
水中翼やプロペラ翼面上に発生するキヤビテイ
厚さの計測は、キヤビテーシヨン理論の検証，キ
ヤビテーシヨンにより誘起される変動圧力の推定
計算等に不可欠のものであり、従来キヤビテーシ
ヨントンネルにおいてこれを行なつている。
Measuring the thickness of cavities that occur on hydrofoils and propeller blade surfaces is essential for verifying cavitation theory, estimating fluctuating pressure induced by cavitation, etc., and has not been previously performed in cavitation tunnels. It's summery.
すなわち、第１図に示すようにプロペラボス２
を有するプロペラ１を２台のステレオカメラ４
ａ，４ｂによつて異なる方向から同時に撮影し、
プロペラ翼上に発生するキヤビテイ３の画像を解
析器にかけてキヤビテイの三次元的形状を等高線
として求めるのである。 That is, as shown in Fig. 1, the propeller boss 2
A propeller 1 with two stereo cameras 4
Take photos simultaneously from different directions with a and 4b,
An image of the cavity 3 generated on the propeller blade is applied to an analyzer to determine the three-dimensional shape of the cavity as contour lines.
しかしながら、このような手段は、ステレオカ
メラによる写真からのキヤビテイ形状の解析が非
常に煩雑で手間が掛かるとゝもに、キヤビテイの
表面は水と気体の境界面であるので鮮明な画像を
得ることが困難であるという欠点がある。 However, with this method, analysis of the cavity shape from photographs taken with a stereo camera is very complicated and time-consuming, and it is difficult to obtain clear images because the cavity surface is the interface between water and gas. The disadvantage is that it is difficult to
〔発明が解決しようとする問題点〕
本発明はこのような事情に鑑みて提案されたも
ので、キヤビテイの三次元的形状を簡単容易にし
かも精度良く計測するキヤビテイ厚さ測定装置を
提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a cavity thickness measuring device that easily and accurately measures the three-dimensional shape of a cavity. With the goal.
そのために本発明は被検体の表面に断面が水流
に対して流線形をなす計測用ピンを突設するとゝ
もに、上記計測用ピンの側面に下端から適宜間隔
で平行に複数の色彩又はマークを付したことを特
徴とする。
To this end, the present invention protrudes from the surface of the test object with a measuring pin whose cross section forms a streamlined shape with respect to the water flow, and at the same time, a plurality of colors or marks are placed on the side surface of the measuring pin in parallel at appropriate intervals from the lower end. It is characterized by the following.
このような構成により、ストロボライトの点滅
を位相を変えつゝ行い、プロペラ翼を順次観測
し、キヤビテイ内に位置する計測用ピンの側面の
色彩とキヤビテイ表面とを比較し、各半径位置
で、前縁から異なつた距離におけるキヤビテイの
厚さ分布を高精度で計測することができる。
With this configuration, the strobe light blinks while changing the phase, the propeller blades are sequentially observed, the color of the side surface of the measurement pin located inside the cavity is compared with the cavity surface, and at each radial position, The thickness distribution of the cavity at different distances from the leading edge can be measured with high precision.
本発明をプロペラのキヤビテイの測定に適用し
た一実施例を図面について説明すると、第２図は
本発明に係るプロペラを船首方向から見た正面
図、第３図，第４図，第５図はそれぞれ第２図の
−，−，−に沿つた拡大断面図、第
６図は第３図の−に沿つた断面図、第７図は
第２図のプロペラをキヤビテーシヨントンネルに
取付けたところを示す正面図である。 An embodiment in which the present invention is applied to the measurement of propeller cavities will be explained with reference to the drawings. Figure 2 is a front view of the propeller according to the present invention viewed from the bow direction, and Figures 3, 4, and 5 are Figure 6 is an enlarged sectional view taken along -, -, and - in Figure 2, Figure 6 is a sectional view taken along - in Figure 3, and Figure 7 shows the propeller in Figure 2 installed in the cavitation tunnel. FIG.
上図において、１ａ，１ｂ，１ｃ，１ｄはそれ
ぞれプロペラ１のプロペラ翼、２はプロペラボ
ス、３は各プロペラ翼に発生するキヤビテイ、５
はキヤビテーシヨントンネル本体、６ａ，６ｂ，
６ｃ，６ｄはそれぞれ観測窓、７ａ，７ｂ，７ｃ
はそれぞれプロペラ翼１ｄ以外のプロペラ翼１
ａ，１ｂ，１ｃに同一半径位置であつて前縁１０
ａ，１０ｂ，１０ｃからそれぞれ異なつた距離だ
け離れた位置に突設され断面が水流に対して流線
形をなし、その側面に下端から異なつた色彩８
ａ，８ｂで１〜２mm巾の平行縞が着色されている
複数のキヤビテイ計測用ピン、９ａ，９ｂはそれ
ぞれプロペラを照射するストロボライト、Ｎはプ
ロペラ１の回転方向である。 In the above diagram, 1a, 1b, 1c, and 1d are the propeller blades of propeller 1, 2 is the propeller boss, 3 is the cavity generated in each propeller blade, and 5
are the cavitation tunnel body, 6a, 6b,
6c and 6d are observation windows, 7a, 7b, and 7c, respectively.
are propeller blades 1 other than propeller blade 1d, respectively.
a, 1b, 1c at the same radial position and leading edge 10
a, 10b, and 10c, projecting at different distances from each other, and having a streamlined cross section with respect to the water flow, and having different colors 8 on the sides from the bottom end.
A and 8b are a plurality of cavity measurement pins colored with parallel stripes of 1 to 2 mm width, 9a and 9b are strobe lights that illuminate the propeller, and N is the rotation direction of the propeller 1.
このような装置で、ストロボライト９ａ，９ｂ
の点滅を位相を変えつゝ行ない、プロペラ翼１ａ
〜１ｄを順次観測し、キヤビテイ３内に位置する
キヤビテイ計測用ピン７の側面の色彩とキヤビテ
イ３表面とを比較すれば、キヤビテイ３の表面が
明瞭に観察できるので、各半径位置において、前
縁から異なつた距離におけるキヤビテイ３の厚さ
分布を±0.5mm程度の精度で計測することができ
る。 With such a device, strobe lights 9a, 9b
The propeller blade 1a blinks while changing the phase.
~1d sequentially and compare the color of the side surface of the cavity measuring pin 7 located inside the cavity 3 with the surface of the cavity 3. Since the surface of the cavity 3 can be clearly observed, the leading edge at each radial position can be clearly observed. The thickness distribution of the cavity 3 at different distances can be measured with an accuracy of about ±0.5 mm.
その際、キヤビテイ計測用ピン７ａ〜７ｃ自身
からもキヤビテイが発生するが、この影響はキヤ
ビテイ計測用ピンより前方へは余り及ばない。し
たがつて、キヤビテイの形状を余り変形させるこ
となくこれを計測することができ、また多少の変
形があつてもキヤビテイ計測用ピン７を突設して
いないプロペラ翼１ｄのキヤビテイと比較するこ
とにより較正が可能である。 At this time, cavities are generated from the cavity measuring pins 7a to 7c themselves, but this influence does not extend much forward of the cavity measuring pins. Therefore, it is possible to measure the shape of the cavity without deforming it too much, and even if there is some deformation, by comparing it with the cavity of the propeller blade 1d without the cavity measurement pin 7 protruding from it. Calibration is possible.
要するに、本発明によれば、被検体の表面に断
面が水流に対して流線形をなす計測用ピンを突設
するとゝもに、上記計測用ピンの側面に下端から
適宜間隔で平行に複数の色彩，又はマークを付し
たことにより、キヤビテイを簡単容易かつ高精度
で計測するキヤビテイ厚さ測定装置を得るから、
本発明は産業上極めて有益なものである。
In short, according to the present invention, a measurement pin whose cross section is streamlined with respect to the water flow is provided protruding from the surface of the test object, and a plurality of measurement pins are provided on the side surface of the measurement pin in parallel at appropriate intervals from the lower end. By attaching colors or marks, a cavity thickness measuring device that can easily and accurately measure cavities can be obtained.
The present invention is extremely useful industrially.
第１図は公知のプロペラのキヤビテイ観測要領
を示す説明図、第２図は本発明に係るプロペラを
船首方向から見た正面図、第３図，第４図，第５
図はそれぞれ第２図の−，−，，に
沿つた拡大断面図、第６図は第３図の−に沿
つた断面図、第７図は第２図のプロペラをキヤビ
テーシヨントンネルに取付けたところを示す正面
図である。
１……プロペラ、１ａ，１ｂ，１ｃ，１ｄ……
プロペラ翼、２……プロペラボス、３……キヤビ
テイ、５……キヤビテーシヨントンネル、６ａ，
６ｂ，６c.６ｄ……観測窓、７ａ，７ｂ，７ｃ…
…キヤビテイ計測用ピン、８ａ，８ｂ……色彩、
９ａ，９ｂ，……ストロボライト、１０ａ，１０
ｂ，１０ｃ……前縁、Ｎ……プロペラの回転方
向。
Fig. 1 is an explanatory diagram showing a known propeller cavity observation procedure, Fig. 2 is a front view of the propeller according to the present invention viewed from the bow direction, Figs. 3, 4, and 5.
The figures are enlarged sectional views taken along -, -, , respectively in Fig. 2, Fig. 6 is a sectional view taken along - in Fig. 3, and Fig. 7 shows the propeller in Fig. 2 installed in a cavitation tunnel. It is a front view showing the attached place. 1... Propeller, 1a, 1b, 1c, 1d...
Propeller blade, 2...Propeller boss, 3...Cavity, 5...Cavity tunnel, 6a,
6b, 6c.6d... Observation window, 7a, 7b, 7c...
...Cavity measurement pin, 8a, 8b...Color,
9a, 9b, ... strobe light, 10a, 10
b, 10c... Leading edge, N... Propeller rotation direction.
Claims (1)
なす計測用ピンを突設するとゝもに、上記計測用
ピンの側面に下端から適宜間隔で平行に複数の色
彩又はマークを付したことを特徴とするキヤビテ
イ厚さ測定装置。1. A measurement pin whose cross section is streamlined with respect to the water flow is protruded from the surface of the test object, and a plurality of colors or marks are attached to the side surface of the measurement pin in parallel at appropriate intervals from the bottom end. A cavity thickness measuring device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12469180A JPS5749834A (en) | 1980-09-10 | 1980-09-10 | Measuring device for thickness of cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12469180A JPS5749834A (en) | 1980-09-10 | 1980-09-10 | Measuring device for thickness of cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5749834A JPS5749834A (en) | 1982-03-24 |
| JPS6158768B2 true JPS6158768B2 (en) | 1986-12-13 |
Family
ID=14891696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12469180A Granted JPS5749834A (en) | 1980-09-10 | 1980-09-10 | Measuring device for thickness of cavity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5749834A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5169593A (en) * | 1989-11-03 | 1992-12-08 | General Electric Company | Control rod drive handling tools for nuclear reactor |
| JP2007155257A (en) * | 2005-12-07 | 2007-06-21 | Matsushita Electric Ind Co Ltd | Heat pump water heater |
| EP3455081B1 (en) | 2016-10-25 | 2022-02-23 | Hewlett-Packard Development Company, L.P. | Temporary fixation of a portion of a printable medium |
| CN113404630B (en) * | 2021-07-12 | 2022-09-02 | 武汉大学 | Hydrofoil cavitation flow control structure |
-
1980
- 1980-09-10 JP JP12469180A patent/JPS5749834A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5749834A (en) | 1982-03-24 |
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