JPS6291272U - - Google Patents
Info
- Publication number
- JPS6291272U JPS6291272U JP18275385U JP18275385U JPS6291272U JP S6291272 U JPS6291272 U JP S6291272U JP 18275385 U JP18275385 U JP 18275385U JP 18275385 U JP18275385 U JP 18275385U JP S6291272 U JPS6291272 U JP S6291272U
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- level
- threshold value
- noise
- stored
- 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
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図は本考案の一実施例を示す概略図、第２
図は雑音が小さい場合に第１図の信号処理・計測
部に入力される電気信号の経時変化を示す図、第
３図は雑音が大きい場合の同様の電気信号の経時
変化を示す図、第４図は従来の超音波レベル計を
示す概略図、第５図は従来の信号処理・計測部に
入力される電気信号の経時変化を示す図である。
１…超音波送受信器、２…貯槽、３…貯蔵物、
４…超音波レベル計本体、８…信号処理・計測部
、９…閾値自動設定器、１１…ベルトコンベア、
Ａ…発射パルス、Ｂ…残響エコー、Ｃ１，Ｃ２…
反射エコー、Ｄ…計測ゲート、Ｅ１，Ｅ２…閾値
、Ｆ１，Ｆ２…ノイズ、Ｐ…サンプルパルス、ｔ
…超音波の往復時間。
Figure 1 is a schematic diagram showing one embodiment of the present invention;
The figure shows the change over time of the electrical signal input to the signal processing/measuring section in Fig. 1 when the noise is small; Figure 3 shows the change over time of the same electrical signal when the noise is large; FIG. 4 is a schematic diagram showing a conventional ultrasonic level meter, and FIG. 5 is a diagram showing changes over time in an electrical signal input to a conventional signal processing/measuring section. 1...Ultrasonic transceiver, 2...Storage tank, 3...Storage,
4...Ultrasonic level meter main body, 8...Signal processing/measurement section, 9...Threshold value automatic setting device, 11...Belt conveyor,
A...Emission pulse, B...Reverberation echo, C1 , C2 ...
Reflected echo, D...measurement gate, E1 , E2 ...threshold, F1 , F2 ...noise, P...sample pulse, t
... Ultrasound round trip time.
Claims (1)
に向けて超音波パルスを発射し、この貯蔵物上面
で反射した超音波パルスを再び上記超音波送信器
で捕え、超音波の往復時間から貯蔵物のレベルを
測定する超音波レベル計において、 上記超音波送受信器から出力される出力信号の
レベルを閾値と比較して反射エコーの到達を判別
し、超音波の往復時間から貯蔵物のレベルを算出
する信号処理・計測部と、上記超音波送受信器か
ら出力される出力信号に含まれるノイズのピーク
を検出して、そのノイズのレベルに応じて上記信
号処理・計測部における閾値を上記ノイズのピー
ク値以上に設定する閾値自動設定器とを備えたこ
とを特徴とする超音波レベル計。[Scope of Claim for Utility Model Registration] Ultrasonic pulses are emitted from an ultrasonic transmitter/receiver installed at the top of the storage tank toward the stored object, and the ultrasonic pulses reflected from the upper surface of the stored object are captured again by the ultrasonic transmitter, In an ultrasonic level meter that measures the level of stored materials based on the round-trip time of ultrasonic waves, the level of the output signal output from the ultrasonic transmitter/receiver is compared with a threshold value to determine whether a reflected echo has arrived, and A signal processing/measuring unit that calculates the level of the stored material based on time, and a signal processing/measuring unit that detects the noise peak included in the output signal output from the ultrasonic transceiver and processes and measures the signal according to the noise level. An ultrasonic level meter comprising: an automatic threshold value setting device for setting a threshold value in the noise peak value or more at the noise peak value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18275385U JPS6291272U (en) | 1985-11-26 | 1985-11-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18275385U JPS6291272U (en) | 1985-11-26 | 1985-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6291272U true JPS6291272U (en) | 1987-06-11 |
Family
ID=31128846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18275385U Pending JPS6291272U (en) | 1985-11-26 | 1985-11-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6291272U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008018176A1 (en) * | 2006-08-08 | 2008-02-14 | Seiko Epson Corporation | Liquid container and liquid consuming device |
-
1985
- 1985-11-26 JP JP18275385U patent/JPS6291272U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008018176A1 (en) * | 2006-08-08 | 2008-02-14 | Seiko Epson Corporation | Liquid container and liquid consuming device |
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