JPH0454409Y2 - - Google Patents
Info
- Publication number
- JPH0454409Y2 JPH0454409Y2 JP2742684U JP2742684U JPH0454409Y2 JP H0454409 Y2 JPH0454409 Y2 JP H0454409Y2 JP 2742684 U JP2742684 U JP 2742684U JP 2742684 U JP2742684 U JP 2742684U JP H0454409 Y2 JPH0454409 Y2 JP H0454409Y2
- Authority
- JP
- Japan
- Prior art keywords
- socket
- pipe
- probe
- ultrasonic
- tube
- 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
- 239000000523 sample Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Description
【考案の詳細な説明】
（考案の技術分野）
本考案は超音波を利用したいわゆる「超音波気
体流量計」に用いる超音波送受波器を収納するソ
ケツトの構造に関するものである。[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to the structure of a socket that accommodates an ultrasonic transducer used in a so-called "ultrasonic gas flowmeter" that utilizes ultrasonic waves.
（従来技術の問題点）
超音波気体流量計は第１図に示すように、管１
の周壁面に筒状ソケツト２と３を、管１の中心軸
に対して角度θ傾けて互に対向する位置に設け、
それぞれのソケツト内に４と５で示す超音波送受
波器（以下プローブという）を固定し、プローブ
間の超音波伝播時間を測定した結果に基づいて気
体の流量を求めるものである。(Problems with the prior art) As shown in Figure 1, the ultrasonic gas flow meter
Cylindrical sockets 2 and 3 are provided on the peripheral wall surface of the tube 1 at positions facing each other at an angle θ with respect to the central axis of the tube 1,
Ultrasonic transducers (hereinafter referred to as probes) indicated by 4 and 5 are fixed in each socket, and the gas flow rate is determined based on the results of measuring the ultrasonic propagation time between the probes.
すなわちプローブ４と５の間で交互に超音波パ
ルスを送受信し、気体の方向成分が超音波伝播方
向と一致している状態のとき、すなわち気体の流
れに対して順方向の伝播時間ｔを測定し、次に逆
方向の伝播時間ｔとを測定して、次の(1)および(2)
式を求め、
t1＝Ｌ／Ｃ＋Vcosθ ……(1)
t2＝Ｌ／Ｃ−Vcosθ ……(2)
(1)と(2)式から次の(3)式を算出し、その結果と管の
断面を参照して流量を求めるものである。 That is, ultrasonic pulses are alternately transmitted and received between the probes 4 and 5, and the propagation time t in the forward direction with respect to the gas flow is measured when the directional component of the gas matches the ultrasonic propagation direction. Then, measure the propagation time t in the opposite direction and obtain the following (1) and (2).
Find the formula, t 1 = L/C + Vcosθ ...(1) t 2 = L/C - Vcosθ ...(2) Calculate the following equation (3) from equations (1) and (2), and The flow rate is determined by referring to the cross section of the pipe.
Ｖ＝Ｌ／2cosθ・（１／t1−１／t2） ……(3)
但し Ｖ＝流速（ｍ／ｓ）
Ｌ＝送受波器間の距離（ｍ）
θ＝超音波伝播軸と管の中心軸とがなす角
度
Ｃ＝静止気体中の超音波伝播速度（ｍ／
ｓ）
ところで管１の内面と送受波器４（又は５）の
外面との間隙を充分に広くすることができれば問
題ないが、この間隙をあまり広くすると送受波器
端部の近傍における気体の流れが乱れるので正確
な測定値が得られない。 V=L/2cosθ・(1/t 1 -1/t 2 ) ...(3) where V=flow velocity (m/s) L=distance between transducer (m) θ=ultrasonic propagation axis and tube Angle formed by the central axis of C = Ultrasonic propagation velocity in stationary gas (m/
s) By the way, there is no problem if the gap between the inner surface of the tube 1 and the outer surface of the transducer 4 (or 5) can be made sufficiently wide, but if this gap is made too wide, the gas flow near the end of the transducer will occur. is disturbed, making it impossible to obtain accurate measurements.
したがつて通常はこのことを考慮に入れて間隙
をできるだけ小さくしているが、実際問題として
万全ではなく、気体の中に含まれる水分等の凝縮
成分６が第２図に示すように間隙の入口近くに付
着あるいは貯溜することがあつて、正規の経路の
他に超音波が管壁を伝わる状態となり甚だ不都合
である。 Therefore, the gap is usually made as small as possible by taking this into account, but in practice this is not perfect, and condensed components 6 such as moisture contained in the gas can cause the gap to become as small as possible, as shown in Figure 2. If the ultrasonic waves adhere or accumulate near the entrance, the ultrasonic waves will be transmitted through the tube wall in addition to the normal path, which is extremely inconvenient.
すなわち第３図にみる通り、プローブ４から送
出された超音波は一方では、矢印Ｘの如く正常の
経路を通つてプローブ５に達し、他方では凝縮成
分６を介し矢印Ｙの如く管１を通つてプローブ５
に達する２つの伝播経路を生ずる。しかるに管１
を伝わる超音波の速度は5000m／ｓ程度であるの
に対し、管内の気体中を伝わる場合は340m／ｓ
程度であるから、管１を伝わる超音波が早くプロ
ーブ５に到達し、そのあとからくる本当に測定し
たい信号を順調に受信するのを邪魔する。 That is, as shown in FIG. 3, the ultrasonic waves sent out from the probe 4 reach the probe 5 through the normal path as shown by the arrow Tsute probe 5
This results in two propagation paths that reach . However, tube 1
The speed of ultrasonic waves traveling through the pipe is about 5000 m/s, while the speed of ultrasound traveling through the gas inside the pipe is 340 m/s.
As a result, the ultrasonic waves traveling through the tube 1 reach the probe 5 quickly, and this interferes with the smooth reception of the subsequent signal that really wants to be measured.
（考案の目的）
本考案はかゝる欠点を除き、水分等の凝縮成分
が滞留しないようにするため、プローブを収納す
るソケツトに水ぬき用の溝を設け、測定不能にな
るのを防止し常に正しい測定を行うもので、次に
実施例の図面を参照して説明する。(Purpose of the invention) The present invention eliminates such drawbacks, and in order to prevent condensed components such as moisture from accumulating, a groove is provided in the socket that houses the probe to prevent measurement from becoming impossible. This method always performs correct measurements, and will be explained next with reference to the drawings of an embodiment.
（考案の構成）
第４図は実施例の平面断面図、第５図は第４図
においてＡ−Ａ線で切断した部分断面図、第６図
は第４図においてＢ−Ｂ線で切断した部分断面図
を示す。(Structure of the device) Fig. 4 is a plan cross-sectional view of the embodiment, Fig. 5 is a partial cross-sectional view taken along the line A-A in Fig. 4, and Fig. 6 is a cross-sectional view taken along the line B-B in Fig. 4. A partial cross-sectional view is shown.
実施例の図面の中で第１図に記入した符号に相
当する部分は同じ符号を附してあるので、その説
明を省略して他の部分に触れると、７はソケツト
２の底部、８は底部７の下に形成された空所で、
この空所にプローブが収納される、９は空所７を
囲んで配設された溝を管路に対して第６図の如き
関係位置に設けてある。 In the drawings of the embodiment, the parts corresponding to the numbers written in FIG. In the cavity formed under the bottom part 7,
A probe is accommodated in this cavity. A groove 9 surrounding the cavity 7 is provided at a position relative to the pipe line as shown in FIG.
溝９の形状は第４図と第５図にみるように、底
部７から管１の内面に向かつて外側に傾斜を有
し、段々広くなつている。かくして傾斜がない場
合に凝縮成分が貯溜するレベルをＬとすると、傾
斜のある場合のレベルはL′となり、そのレベル差
は１となる（第４図参照）から、図示の如く管１
の管路を縦にして使うときは、凝縮成分は斜面を
伝わつて管路に向い下の方に流れ去る。そして管
路を水平にして使うときは、前記とは別の溝が同
様の役割をする。 As shown in FIGS. 4 and 5, the groove 9 has an outward slope from the bottom 7 toward the inner surface of the tube 1, and gradually becomes wider. Thus, if the level at which condensed components accumulate when there is no slope is L, then the level when there is a slope is L', and the level difference is 1 (see Figure 4). Therefore, as shown in the figure, the pipe 1
When the pipe is used vertically, the condensed components flow down the pipe towards the slope. When the conduit is used horizontally, another groove plays a similar role.
（考案の効果）
以上の通りであるから本考案は、管路内気体に
含まれる水等の凝縮成分はソケツトとプローブの
間に貯溜しないで、前記溝を経て円滑に管路に排
出できるため、正規の経路外の超音波の伝播を防
止できるので、つねに正しい測定を行うことがで
きる。(Effect of the invention) As described above, the present invention allows condensed components such as water contained in the gas in the pipe to be smoothly discharged into the pipe through the groove without accumulating between the socket and the probe. Since it is possible to prevent ultrasonic waves from propagating outside the normal path, accurate measurements can always be made.
第１図は超音波流量計の原理説明図。第２図は
凝縮成分を生じた場合の説明図。第３図は凝縮成
分を生じた場合における超音波伝播状態説明図。
第４図は実施例の平面断面図。第５図は第４図の
Ａ−Ａ線断面図。第６図は第４図のＢ−Ｂ線断面
図。
１……管、２，３……筒状ソケツト、４，５…
…プローブ、６……凝縮成分、７……ソケツト２
の底部、８……プローブが収納される空所、９…
…溝。
Figure 1 is a diagram explaining the principle of an ultrasonic flowmeter. FIG. 2 is an explanatory diagram when a condensed component is generated. FIG. 3 is an explanatory diagram of the ultrasonic propagation state when a condensed component is generated.
FIG. 4 is a plan sectional view of the embodiment. FIG. 5 is a sectional view taken along line A-A in FIG. 4. FIG. 6 is a sectional view taken along the line B-B in FIG. 4. 1... Pipe, 2, 3... Cylindrical socket, 4, 5...
...Probe, 6...Condensed component, 7...Socket 2
bottom part, 8... empty space where the probe is stored, 9...
…groove.
Claims (1)
て所定の角度傾け、かつ対向する位置に筒状のソ
ケツトが配設され、該ソケツトの先端にあつて該
ソケツトの内壁面との間に僅かの間隔を設けてプ
ローブが固定されている構造のものにおいて、前
記プローブを包む面上にあつて前記管の内面の開
口端に向かつて広くなつてゆく形状の傾斜を設け
た凝縮成分の付着を防止する溝が形成されている
ことを特徴とする超音波気体流量測定装置。 A cylindrical socket is provided on the circumferential wall of the gas conveying pipe at a position that is inclined at a predetermined angle with respect to the central axis of the pipe and is opposed to the pipe, and the socket is located at the tip of the socket and is connected to the inner wall of the socket. A condensed component having a structure in which a probe is fixed with a slight interval between the tubes, and a condensed component having a slope that widens toward the open end of the inner surface of the tube on the surface surrounding the probe. 1. An ultrasonic gas flow rate measuring device characterized in that a groove is formed to prevent the adhesion of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2742684U JPS60141517U (en) | 1984-02-29 | 1984-02-29 | Ultrasonic gas flow measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2742684U JPS60141517U (en) | 1984-02-29 | 1984-02-29 | Ultrasonic gas flow measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60141517U JPS60141517U (en) | 1985-09-19 |
| JPH0454409Y2 true JPH0454409Y2 (en) | 1992-12-21 |
Family
ID=30524368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2742684U Granted JPS60141517U (en) | 1984-02-29 | 1984-02-29 | Ultrasonic gas flow measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60141517U (en) |
-
1984
- 1984-02-29 JP JP2742684U patent/JPS60141517U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60141517U (en) | 1985-09-19 |
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