JPS58198701A - Device for measuring thickness of water film on road surface - Google Patents
Device for measuring thickness of water film on road surfaceInfo
- Publication number
- JPS58198701A JPS58198701A JP8085782A JP8085782A JPS58198701A JP S58198701 A JPS58198701 A JP S58198701A JP 8085782 A JP8085782 A JP 8085782A JP 8085782 A JP8085782 A JP 8085782A JP S58198701 A JPS58198701 A JP S58198701A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- water
- water film
- hollow glass
- road surface
- 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
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
- G01B5/066—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness of coating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
Description
【発明の詳細な説明】
する水膜の厚さを測定する水膜厚測定器に関するもので
、水平調節のできる三点支持の平盤上に回転可能な垂直
支持台を設け、さらにこの支持台の垂直方向に平行な軸
を取付け、この軸に沿って滑動できるラックに貫通せし
め、ラックにはスピンドルの測定子部に中空ガラス管を
固着したリフティングレバー付きダイヤルゲージを取付
け、垂直支持台に設けたピニオンをこのラックに噛合せ
ることにより成り、このピニオンを回転してダイヤルゲ
ージの中空ガラス管が水面に接継したとき生じる毛細管
現象より水面を検知し、その位置をダイヤルゲージの目
盛の０点とすると共にリフティングレバーを操作して、
中空ガラス管が路面に接したときのダイヤルゲージの指
示目盛よシ水膜厚を求めるようにしたものである。[Detailed Description of the Invention] This relates to a water film thickness measuring device for measuring the thickness of a water film. A shaft parallel to the vertical direction is attached, and a rack that can slide along this axis is inserted through the rack.A dial gauge with a lifting lever, in which a hollow glass tube is fixed to the measuring point of the spindle, is attached to the rack, and the dial gauge is mounted on a vertical support. By rotating this pinion, the water surface is detected by the capillary phenomenon that occurs when the hollow glass tube of the dial gauge is connected to the water surface, and the position is determined as the 0 point on the scale of the dial gauge. and operate the lifting lever,
The thickness of the water film is determined from the indication scale of the dial gauge when the hollow glass tube is in contact with the road surface.
路面等のすべり抵抗を測定する場合、乾燥状態、湿潤状
態の両状態での測定が可能であるが、車輛のスリップは
降雨時によく生ずることから、路面のすべり抵抗値は一
般に湿潤状態で測定した値をもって評価している。しか
し、同じ状態の路面でも表面に形成された水膜の厚さく
通常０．５ｔａｎ〜１． Ｏｔｅａ ）の多少によって
すベシ抵抗値が異る。従って路面のすべり抵抗値の評価
をよシ精確にするためには、路面上の水膜の厚さを明ら
かにすることが不可欠のこととなる。When measuring the skid resistance of road surfaces, etc., it is possible to measure them both in dry and wet conditions, but since vehicle slips often occur during rain, the skid resistance values of road surfaces are generally measured in wet conditions. It is evaluated based on value. However, even when the road surface is in the same condition, the thickness of the water film formed on the surface is usually 0.5 tan to 1. The resistance value varies depending on the amount of Otea). Therefore, in order to more accurately evaluate the slip resistance value of a road surface, it is essential to clarify the thickness of the water film on the road surface.
従来との水膜厚を測定する方法としては、バーニアによ
るほかＮＡＳＡで開発された水膜厚計がある。バーニア
による方法は、水の表面張力が働き不精確であり、かつ
個人差も大きい。またＮＡＳＡで開発された水膜厚計は
、路面に接する脚が路面の凹凸の影響を受けるほか、水
膜厚検出用ガラス棒が有限個であるため精度の高い測定
には向いていない。Conventional methods for measuring water film thickness include the Vernier method and the water film thickness meter developed by NASA. The Vernier method is inaccurate due to the surface tension of water, and there are large individual differences. In addition, the water film thickness meter developed by NASA is not suitable for highly accurate measurements because the legs in contact with the road are affected by the unevenness of the road, and there are only a finite number of glass rods for detecting water film thickness.
本発明にかがる水膜厚測定器は簡単々操作で、しかもダ
イヤルゲージの目盛単位で水膜厚が測定でき、垂直支持
台を中心として数点測定できるので、その平均値をもっ
て水膜厚とすれば路面の粗ｉ さによる
誤差は無視でき、かつ個人差が生じないので、精度の高
い水膜厚が得られ、路面の評価をさらに精確にすること
ができる。The water film thickness measuring device according to the present invention is easy to operate, and can measure the water film thickness in units of dial gauge scales, and can measure several points around the vertical support stand, so the average value can be used to determine the water film thickness. If so, the error due to the roughness of the road surface i can be ignored, and individual differences do not occur, so a highly accurate water film thickness can be obtained, and the evaluation of the road surface can be made more precise.
本発明を第１〜第４図に示す実施例に従って説明する。The present invention will be explained according to the embodiments shown in FIGS. 1 to 4.
第１図は本器の斜視図を示している。１は平盤で馬蹄形
を形成しておシ、平盤１の下面には三点支持するための
脚が取シ付けられている。２は固定脚で平盤１に固着さ
れている。３，３′は可動脚で平盤１に螺入されており
、固定脚２を支点として平盤１の水平を水準器４を見な
がら調節する。FIG. 1 shows a perspective view of the device. 1 is a flat plate forming a horseshoe shape, and legs are attached to the bottom surface of the flat plate 1 for supporting it at three points. 2 is a fixed leg fixed to the flat plate 1. Movable legs 3 and 3' are screwed into the flat plate 1, and the level of the flat plate 1 is adjusted using the fixed leg 2 as a fulcrum while looking at the level 4.
５は垂直支持台で第２図に示すように一端の円形軸６が
平盤１を貫通し、平座金７およびねじ８によシ把手９を
左右に振って円滑に「ガタ」なく回るように取シつけで
ある。１０は案内枠で、ラック１１を貫通し垂直支持台
５の垂直方向に平行に止めねじ１２ 、１２’によシ固
着しである。１３はピニオンで、ラック１１と噛み合っ
ていて軸１４に固着されている。軸１４はラック１１お
よびこのラックに取付けたダイヤルゲージ１５の可動部
を充分支持して自然降下しない程度の嵌め合いて垂直支
持台５に支架され、外端に回転用把手１４′を固着して
いる。ダイヤルゲージ１５は公知のも３−
ので リフティングレバー１６、スピンドル１７、目盛
板１８、指針１９を備えている。２０は中空ガラス管で
、上端はスピンドル１７に螺合し、その下端外径は普通
の路面粗さよ１妙じ太目１′に絞っである。中空ガラス
管２０の中空部２１は毛細管現象が充分に見易いような
内径になっている。Reference numeral 5 denotes a vertical support stand, and as shown in Fig. 2, a circular shaft 6 at one end passes through the flat plate 1, and a flat washer 7 and a screw 8 are used to swing the handle 9 from side to side so that it rotates smoothly without any rattling. This is especially true. Reference numeral 10 denotes a guide frame, which passes through the rack 11 and is fixed in parallel to the vertical direction of the vertical support base 5 by set screws 12 and 12'. A pinion 13 meshes with the rack 11 and is fixed to the shaft 14. The shaft 14 is supported on the vertical support stand 5 in such a way that it fully supports the movable part of the rack 11 and the dial gauge 15 attached to this rack and does not fall down naturally, and has a rotating handle 14' fixed to its outer end. There is. The dial gauge 15 is a well-known model and includes a lifting lever 16, a spindle 17, a scale plate 18, and a pointer 19. 20 is a hollow glass tube, the upper end of which is screwed into the spindle 17, and the outer diameter of the lower end is 1' thicker than normal road surface roughness. The hollow portion 21 of the hollow glass tube 20 has an inner diameter such that the capillary phenomenon is sufficiently visible.
第３図において２２は空気の逃げ穴で、毛細管現象によ
り水がガラス管２０内に浸入することによる圧力抵抗を
無くするためのもの、また２３は路面、２４は水膜、２
５は水面である。第４図に示す２６は引張りコイルスプ
リングでありスピンドル１７を常に上方に引き揚げてお
くためのもので、一端をダイヤルゲージ１５の外枠２７
に、他端をリフティングレバー１６にねじ２８ 、２８
’によシ止めである。In FIG. 3, 22 is an air escape hole for eliminating pressure resistance caused by water entering the glass tube 20 due to capillary action, 23 is a road surface, 24 is a water film, 2
5 is the water surface. Reference numeral 26 shown in FIG. 4 is a tension coil spring for keeping the spindle 17 upward at all times, and one end is connected to the outer frame 27 of the dial gauge 15.
Then, attach the other end to the lifting lever 16 with screws 28, 28.
'It is a stopper.
リフティングレバー１６は外枠２７に段付きねじ２９に
より枢支され、一端は蛙又になっていてスピンドル１７
のピン３０を挾んでおり、他端は枠３１の外側に突出し
て把手３２を形成している。The lifting lever 16 is pivotally supported on the outer frame 27 by a stepped screw 29, and has a frog at one end and is attached to the spindle 17.
The other end protrudes outside the frame 31 to form a handle 32.
なお、第１図で３３は止めねじで、ダイヤルゲ５−ｎ ４− 一ジ１５をラック１１に固着している。In addition, in Fig. 1, 33 is a set screw, which is attached to the dial gear 5-n. 4- One screw 15 is fixed to the rack 11.
このような構成において、水膜厚を測定しようとする路
面２３に、回転用把手１４′を一方向に回し切りラック
１１が上昇位置にある状態にして本器を設置し、可動脚
３，３′を操作して水準器４によシ平盤１を水平にする
。次に中空ガラス管２０の先端を見々から回転用把手１
４′を徐々に他方向に回し、ピニオン１３、ラック１１
を経由して中空ガラス管２０を下降させる。そしてその
先端が第３図に示すように水面２５に接触し、毛細管現
象によりガラス管２０の中空部２１に水位が上昇するの
を見て止める。ここでダイヤルゲージ１５の目盛板１８
のＯ目盛位置を指針１９に合せる。In such a configuration, the device is installed on the road surface 23 on which the water film thickness is to be measured, with the rotating handle 14' turned in one direction and the rack 11 in the raised position, and the movable legs 3, 3 ' to level the flat plate 1 using the spirit level 4. Next, look at the tip of the hollow glass tube 20 and attach the rotating handle 1.
4' gradually in the other direction, pinion 13 and rack 11
The hollow glass tube 20 is lowered through. Then, the tip comes into contact with the water surface 25 as shown in FIG. 3, and stops when the water level rises in the hollow part 21 of the glass tube 20 due to capillary action. Here, the scale plate 18 of the dial gauge 15
Align the O scale position with the pointer 19.
リフティングレバー１６の先端３２を上方へ静かに図示
し々い指先きにて押すと、中空ガラス管２０の先端が路
面２３にあたる。When the tip 32 of the lifting lever 16 is gently pushed upward with a fingertip as shown, the tip of the hollow glass tube 20 hits the road surface 23.
このとき指針１９の指示する目盛数字が水膜の厚さを示
す。指示目盛を読み終ってからリフティングレバー１６
より図示し々い指先きを離し、再び回転用把手１４′を
一方向に回し切ると中空ガラ６一
ス管２０の先端が水面２５より離れる。次に中空ガラス
管２０の先端に吸い数紙等、吸水性の強い紙をあてがう
ことによシ、中空ガラス管内に残留した水は容易に排出
され次回の測定が可能となる。At this time, the scale number indicated by the pointer 19 indicates the thickness of the water film. After reading the indication scale, lift the lifting lever 16.
When the user releases the fingertips as shown in the figure and turns the rotary handle 14' completely in one direction again, the tip of the hollow glass tube 20 separates from the water surface 25. Next, by applying highly water-absorbing paper such as wicking paper to the tip of the hollow glass tube 20, the water remaining in the hollow glass tube can be easily drained, making it possible to perform the next measurement.
水膜を形成している路面２３の粗さに対する水膜厚の平
均値を求めるには、把手９を少し左右に回して位置を変
え同様の測定を数回行って求める。In order to obtain the average value of the water film thickness relative to the roughness of the road surface 23 on which the water film is formed, the handle 9 is rotated slightly left and right to change the position and the same measurement is performed several times.
このようにして求めた路面の水膜厚はダイヤルゲージの
指示目盛の単位で測定でき、かつ操作が簡単で個人差が
無く非常に信頼できるので、湿潤、５゜＋１
状態における路面のすべり抵抗測定値の評価を精確に行
うことができる。The water film thickness of the road surface obtained in this way can be measured in units of the indicated scale of the dial gauge, and it is easy to operate and has no individual differences and is very reliable, so it can be used to measure the slip resistance of the road surface in a wet, 5° + 1 condition. Values can be evaluated accurately.
第１図は本発明にかがろ水膜厚測定器の具体例を示す斜
視図、第２図は平盤と垂直支持台の嵌め合いを示す断面
図、第３図は中空ガラス管が水膜を形成している路面に
接触した状態を示す断面図、第４図はリフティングレバ
ー付きダイヤルゲージの機構を示す裏面図である。
１・・・平盤、５・・・垂直支持台、１０・・・案内枠
、１１・・・ラック、１３・・・ピニオン、１５・・・
ダイヤルゲージ、１６・・・リフティングレバー、１７
・・・スピンドル、１８・・・目盛板、１９・・・指針
、２ｏ・・・中空ガラス管、２３・・・路面、２４・・
・水膜、２５・・・水面。
特許出願人 日 本道路公 団
同 株式会社八千代製作所
７−Fig. 1 is a perspective view showing a specific example of the water film thickness measuring device according to the present invention, Fig. 2 is a sectional view showing the fitting of a flat plate and a vertical support, and Fig. 3 is a perspective view showing a concrete example of the water film thickness measuring device according to the present invention. A sectional view showing the state in which the dial gauge is in contact with the road surface forming the membrane, and FIG. 4 is a back view showing the mechanism of the dial gauge with a lifting lever. DESCRIPTION OF SYMBOLS 1... Flat plate, 5... Vertical support stand, 10... Guide frame, 11... Rack, 13... Pinion, 15...
Dial gauge, 16...Lifting lever, 17
... Spindle, 18... Scale plate, 19... Pointer, 2o... Hollow glass tube, 23... Road surface, 24...
・Water film, 25...water surface. Patent applicant: Japan Highway Public Corporation Yachiyo Seisakusho Co., Ltd. 7-
Claims (1)
台を設け、この支持台にはその垂直方向に平行な案内枠
を取付け、この桿にラックを桿方向に摺動自在に嵌合し
、ラックにはスピンドルの測定子部に中空ガラス管を固
着したリフ器ティングレバー付ダイヤルゲージを取付け
、垂直支持台に設けたピニオンをこのラックに噛合せる
ことによυ成シ、このピニオンの回転で、中空ガラス管
が水面に接触したとき生じる毛細管現象により水面を検
知し、その位置をダイヤルゲージの目盛板のＯ点上する
七共に、す７テインクレバーの操作で、中空ガラス管が
路面に接したときのダイヤルゲージの指針より水膜厚を
測定することを特徴とする路面用水膜厚測定器。A rotatable vertical support is provided on a horizontally adjustable three-point support plate, a guide frame parallel to the vertical direction is attached to the support, and a rack is fitted onto this rod so as to be slidable in the direction of the rod. Then, a dial gauge with a lifting lever with a hollow glass tube fixed to the measuring head of the spindle is attached to the rack, and a pinion installed on a vertical support is engaged with this rack. When the hollow glass tube contacts the water surface, the water surface is detected by the capillary phenomenon that occurs when the hollow glass tube contacts the water surface. A road surface water film thickness measuring device characterized by measuring the water film thickness from the pointer of a dial gauge when in contact with the road surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8085782A JPS58198701A (en) | 1982-05-15 | 1982-05-15 | Device for measuring thickness of water film on road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8085782A JPS58198701A (en) | 1982-05-15 | 1982-05-15 | Device for measuring thickness of water film on road surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58198701A true JPS58198701A (en) | 1983-11-18 |
Family
ID=13730008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8085782A Pending JPS58198701A (en) | 1982-05-15 | 1982-05-15 | Device for measuring thickness of water film on road surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58198701A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007240278A (en) * | 2006-03-07 | 2007-09-20 | Yokohama Rubber Co Ltd:The | Water depth measuring device |
| JP2012242193A (en) * | 2011-05-18 | 2012-12-10 | Mitsutoyo Corp | Outer dimension measuring instrument |
| CN104715960A (en) * | 2014-12-31 | 2015-06-17 | 龙口矿业集团有限公司 | Vacuum tube alternating current contactor adjuster |
| CN109798835A (en) * | 2019-02-20 | 2019-05-24 | 同济大学 | Asphalt pavement surface water film thickness single-point monitoring device and installation method |
| CN116929275A (en) * | 2023-09-18 | 2023-10-24 | 山东伊狄达汽车与轮胎试验场有限公司 | Water film thickness measuring instrument based on simulated road surface sprinkling |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144354B2 (en) * | 1972-10-24 | 1976-11-27 |
-
1982
- 1982-05-15 JP JP8085782A patent/JPS58198701A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5144354B2 (en) * | 1972-10-24 | 1976-11-27 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007240278A (en) * | 2006-03-07 | 2007-09-20 | Yokohama Rubber Co Ltd:The | Water depth measuring device |
| JP2012242193A (en) * | 2011-05-18 | 2012-12-10 | Mitsutoyo Corp | Outer dimension measuring instrument |
| CN104715960A (en) * | 2014-12-31 | 2015-06-17 | 龙口矿业集团有限公司 | Vacuum tube alternating current contactor adjuster |
| CN109798835A (en) * | 2019-02-20 | 2019-05-24 | 同济大学 | Asphalt pavement surface water film thickness single-point monitoring device and installation method |
| CN116929275A (en) * | 2023-09-18 | 2023-10-24 | 山东伊狄达汽车与轮胎试验场有限公司 | Water film thickness measuring instrument based on simulated road surface sprinkling |
| CN116929275B (en) * | 2023-09-18 | 2023-12-05 | 山东伊狄达汽车与轮胎试验场有限公司 | Water film thickness measuring instrument based on simulated road surface sprinkling |
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