JPS6093921U - Ultrasonic propagation time detection circuit device - Google Patents
Ultrasonic propagation time detection circuit deviceInfo
- Publication number
- JPS6093921U JPS6093921U JP18580283U JP18580283U JPS6093921U JP S6093921 U JPS6093921 U JP S6093921U JP 18580283 U JP18580283 U JP 18580283U JP 18580283 U JP18580283 U JP 18580283U JP S6093921 U JPS6093921 U JP S6093921U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- circuit device
- propagation time
- time detection
- ultrasonic propagation
- 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.)
- Granted
Links
Landscapes
- Measuring Volume Flow (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はＴＬＬ方式による超音波伝播時間検出回路の原
理を示すブロック図、第２図は従来の超音波伝播時間検
出回路装置を含むＴＬＬ方式超音波流量計を示すブロッ
ク図、第２Ａ図は第２図における時間差検出回路３の詳
細を示すブロック図、第３図は第２図における各部信号
のタイミングチャート、第４図は従来技術における問題
点を説明するためのランプ出力波形図、第５図は本考案
の第１実施例を示すブロック図、第５Ａ図はその要部の
構成の一例を示すブロック図、第６図は本考案を実施し
た場合におけるランプ出力波形とサンプリング時点との
関係を示した説明図、第７図および第８図は本考案の第
２実施例および第３実施例のブロック図である。
符号説明、１・・・・・・受信回路、２・・・・・・カ
ウンタ、３・・・・・・時間差検出回路、４・・・・・
・電圧制御発振器（ＶＣＯ）、５・・・・・・同期発生
回路、６・・・・・・送信回路、７・・・・・・タイミ
ング発生回路、８ａ、８ｂ・・・・・・振動子、９・・
・・・・周波数差検出回路、１０・・・・・・サンプリ
ング時間設定回路、１１・・・・・・遅延回路、１２・
・・・・・単安定マルチバイブレーク、ＡＩ、Ａ２・・
・・・・アンド回路。Fig. 1 is a block diagram showing the principle of an ultrasonic propagation time detection circuit using the TLL method, Fig. 2 is a block diagram showing a TLL type ultrasonic flowmeter including a conventional ultrasonic propagation time detection circuit device, and Fig. 2A is a block diagram showing the principle of an ultrasonic propagation time detection circuit using the TLL method. 2 is a block diagram showing details of the time difference detection circuit 3, FIG. 3 is a timing chart of signals of each part in FIG. 2, FIG. 4 is a lamp output waveform diagram for explaining problems in the prior art, and FIG. The figure is a block diagram showing the first embodiment of the present invention, Figure 5A is a block diagram showing an example of the configuration of its main parts, and Figure 6 is the relationship between the lamp output waveform and the sampling time when the present invention is implemented. 7 and 8 are block diagrams of the second and third embodiments of the present invention. Explanation of symbols, 1... Receiving circuit, 2... Counter, 3... Time difference detection circuit, 4...
・Voltage controlled oscillator (VCO), 5... Synchronization generation circuit, 6... Transmission circuit, 7... Timing generation circuit, 8a, 8b... Vibration Child, 9...
...Frequency difference detection circuit, 10...Sampling time setting circuit, 11...Delay circuit, 12.
...Monostable multi-bi break, AI, A2...
...AND circuit.
Claims (1)
要する計数時間と超音波が測定媒体中を伝播するのに要
する伝播時間との時間差を検出した後サンプリングし、
このサンプル値が所定値になるように前記発振器の発振
周波数を制御し、この発振器の発振周波数から前記伝播
時間を検出する回路装置において、前記サンプリングの
タイミングを前記カウンタの計数終了時刻または超音波
の伝播終了時刻を基線にして決定する手段を具備したこ
とを特徴とする超音波伝播時間検出回路装置。Sampling after detecting the time difference between the counting time required for the counter to count the oscillation output of the oscillator to the set value and the propagation time required for the ultrasonic wave to propagate in the measurement medium,
In a circuit device that controls the oscillation frequency of the oscillator so that the sample value becomes a predetermined value, and detects the propagation time from the oscillation frequency of the oscillator, the timing of the sampling is set to the counting end time of the counter or the ultrasonic wave. An ultrasonic propagation time detection circuit device comprising means for determining a propagation end time using a base line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18580283U JPS6093921U (en) | 1983-12-02 | 1983-12-02 | Ultrasonic propagation time detection circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18580283U JPS6093921U (en) | 1983-12-02 | 1983-12-02 | Ultrasonic propagation time detection circuit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093921U true JPS6093921U (en) | 1985-06-26 |
| JPH0436405Y2 JPH0436405Y2 (en) | 1992-08-27 |
Family
ID=30401502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18580283U Granted JPS6093921U (en) | 1983-12-02 | 1983-12-02 | Ultrasonic propagation time detection circuit device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093921U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4662330B2 (en) * | 2004-07-28 | 2011-03-30 | リコーエレメックス株式会社 | Ultrasonic flow meter |
-
1983
- 1983-12-02 JP JP18580283U patent/JPS6093921U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0436405Y2 (en) | 1992-08-27 |
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