JPS6217640A - Apparatus for measuring sludge level - Google Patents
Apparatus for measuring sludge levelInfo
- Publication number
- JPS6217640A JPS6217640A JP15609185A JP15609185A JPS6217640A JP S6217640 A JPS6217640 A JP S6217640A JP 15609185 A JP15609185 A JP 15609185A JP 15609185 A JP15609185 A JP 15609185A JP S6217640 A JPS6217640 A JP S6217640A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- water
- level
- tank
- water level
- 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
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、水と分離してタンク内の底部に沈澱している
スラッジのレベルを連続的に測定するスラッジレベル測
定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a sludge level measuring device that continuously measures the level of sludge separated from water and settled at the bottom of a tank.
例えば原子力発電所等のプラントでは、水処理装置から
排出された放射性廃液をスラッジタンクに集め、ここで
スラッジ成分を沈澱させて水と分離した状態で長期間貯
蔵し、放射性核種崩壊を行なわせるようにしている。For example, in plants such as nuclear power plants, radioactive waste fluid discharged from water treatment equipment is collected in a sludge tank, where the sludge components are precipitated and stored separately from water for a long period of time, allowing the radionuclides to decay. I have to.
タンク内のスラッジレベルは、廃液の受入れや移送の管
理を行なうための重要な情報となる。そこで、タンク内
のスラッジレベルを工ｑ定する必要がある。The sludge level in the tank provides important information for managing the reception and transfer of waste liquid. Therefore, it is necessary to determine the sludge level in the tank.
従来のスラッジレベル測定は、第４図に示す如く、タン
ク１内の所定の高さ位１ｆｆ（ｈ＞に、例えば超音波式
レベルスイッチ２を固定的に配置しておき、タンク１内
のスラッジ３が増加してスラッジ３と水４との境界面５
（すなわちスラッジレベル）がスイッチ２の位置に達す
るとスイッチ２が動作し、変換器６を介して警報器７を
警報動作（警報音、警報ランプ点灯等）させるように構
成されていた。In the conventional sludge level measurement, as shown in FIG. 3 increases and the interface 5 between sludge 3 and water 4
When the sludge level (that is, the sludge level) reaches the position of the switch 2, the switch 2 is operated, and the alarm 7 is caused to perform an alarm operation (alarm sound, alarm lamp lighting, etc.) via the converter 6.
しかしながら、このスラッジレベル測定装置ではレベル
スイッチ２が固定式であるために、連続的な測定が行な
われず、スラッジ３が所定旧に達して警報器７が警報動
作するまでそのレベルが分らないという問題があった。However, in this sludge level measuring device, since the level switch 2 is fixed, continuous measurement is not performed, and the problem is that the level cannot be known until the sludge 3 reaches a predetermined age and the alarm 7 activates. was there.
また、実際にはスラッジ３と水４との境界面５が明確で
なかったり、境界面５が激しい凹凸面になっていること
が多く、このような悪条件のため、信頼性の高い測定結
果を（ｑることか困難であるという問題もあった。In addition, in reality, the boundary surface 5 between the sludge 3 and the water 4 is often not clear or the boundary surface 5 is extremely uneven, and due to these adverse conditions, highly reliable measurement results cannot be obtained. There was also the problem that it was difficult to read (q).
さらに、レベルスイッチ２にスラッジ３が付着するため
、故障が生じ易いという問題もあった。Furthermore, since the sludge 3 adheres to the level switch 2, there is also the problem that failures are likely to occur.
そこで、常時スラッジ３と水４との境界面５に位置する
ような浮子式レベル計を使用して、連続的にスラッジレ
ベルを測定することも考えられている。ところが、この
場合はレベル計を上下方向にガイドするためのガイド機
構が必要となり、構成が複雑化するとともに、レベル計
とガイド機構との間にスラッジが付着してレベル計の動
きが悪くなったり、故障したりするおそれが多分にあり
、また、第４図の装置と同様に、境界面５の条件により
、信頼性の高い測定結果が１９１１い問題もあって実用
化されていない。Therefore, it has been considered to continuously measure the sludge level using a float type level meter that is always located at the interface 5 between the sludge 3 and water 4. However, in this case, a guide mechanism is required to guide the level meter in the vertical direction, which complicates the configuration and also causes sludge to adhere between the level meter and the guide mechanism, which may impede the movement of the level meter. , there is a high risk of failure, and, like the device shown in FIG. 4, there is also the problem that highly reliable measurement results cannot be obtained due to the conditions of the boundary surface 5, so it has not been put into practical use.
本発明はこれらの問題を１＋？ｌ ：！ 、ｊろために
なされたもので、その目的は、簡単な構成でタンク内の
スラッジのレベルを連続的に測定することができ、かつ
、信頼性の高い測定結果を得ることができ、故障のおそ
れも少ないスラッジレベル測定ｉｔを提供することにあ
る。The present invention solves these problems by 1+? L:! The purpose was to be able to continuously measure the level of sludge in a tank with a simple configuration, to obtain highly reliable measurement results, and to prevent malfunctions. The object of the present invention is to provide a method for measuring sludge level with less risk.
本発明のスラッジレベル測定装置は、水位検出手段によ
りタンク内の水位を検出するとともに、圧力検出手段に
よりタンクの底部における水及びスラッジによる水頭圧
を検出し、この圧力検出手段で検出された水頭圧及び水
位検出手段で検出された水位に基いて、演算手段により
タンク内のスラッジレベルを算出するものである。The sludge level measuring device of the present invention detects the water level in the tank by the water level detection means, detects the water head pressure due to water and sludge at the bottom of the tank by the pressure detection means, and detects the water head pressure detected by the pressure detection means. Based on the water level detected by the water level detection means, the sludge level in the tank is calculated by the calculation means.
まず、第１図に示す本発明の第１実施例について説明す
る。First, a first embodiment of the present invention shown in FIG. 1 will be described.
プラント内の水処理装置からの放射性廃液を集めて貯蔵
するスラッジタンク１の上部には水面８の高さすなわち
水位Ｈを検出するための水位検出手段として超音波式水
位検出器９を配置する。またスラッジタンク１の底部に
は、スラッジ３及び水４による水頭圧Ｐを検出するため
の圧力検出手段として圧力センサ１０を配置する。そし
て、この圧力センサ１０からの出力信号は信号変換器１
１で標準信号に変換された後、演碑器１２へ入力され、
水位検出器９からの出力信号は信号変ＩＩｌ器１３で標
準信号に変換された後、演算器１２へ入力される。そし
てこの演算器１２では、圧力センサ１０で検出された水
頭圧Ｐ及び水位検出器９で検出された水位Ｈに基きスラ
ッジレベルを算出する。この算出結果はスラッジレベル
表示器１４で表示されるとともに、警報器７に入力し、
警報器７ではスラッジレベルが所定の値に達したとき警
報動作（警報音、警報ランプ点灯等）する。なお、上記
演算器１２及び信号変換器１１．１３によって演算手段
１５が構成されている。また、必要に応じて水位監視装
置１６も設けられるが、これは水位検出器９で兼用する
ことも可能である。An ultrasonic water level detector 9 is disposed at the top of a sludge tank 1 that collects and stores radioactive waste liquid from water treatment equipment in a plant as a water level detection means for detecting the height of a water surface 8, that is, a water level H. Further, a pressure sensor 10 is disposed at the bottom of the sludge tank 1 as a pressure detection means for detecting the head pressure P due to the sludge 3 and water 4. The output signal from this pressure sensor 10 is transmitted to a signal converter 1.
After being converted into a standard signal in step 1, it is input to the performance device 12,
The output signal from the water level detector 9 is converted into a standard signal by a signal converter 13, and then input to a calculator 12. The calculator 12 calculates the sludge level based on the head pressure P detected by the pressure sensor 10 and the water level H detected by the water level detector 9. This calculation result is displayed on the sludge level display 14, and is also input to the alarm 7.
The alarm device 7 performs an alarm operation (alarm sound, alarm lamp lighting, etc.) when the sludge level reaches a predetermined value. Note that the arithmetic unit 12 and the signal converter 11.13 constitute the arithmetic means 15. A water level monitoring device 16 is also provided if necessary, but the water level detector 9 can also be used for this purpose.
演算器１２における、スラッジレベルｈ１の算出は次の
ように行なわれる。Calculation of the sludge level h1 in the calculator 12 is performed as follows.
スラッジレベル（スラッジタンク１の底面からスラッジ
３と水４との境界面５までの距離）をｈｌ、境界面５か
ら水面８までの距離をｈ２、スラッジ３の密度をρ１、
水４の密度をρ２、ｍ力の加速度をＱとすると、圧力セ
ンサ１０で検出される水頭圧Ｐは、
Ｐ−Ｑ＋ Ｑ ｈ１＋Ｄ２Ｑｈ２ −（１）一
方、水位検出器って検出される水位Ｈは、１−（−ｈｌ
＋ｈ２ ・・・（′２Ｊ（
Ｉｆ（２１式より、スラッジレベルｈｉは、（ρ１−０
２）Ｑ Ｄｔ −，０２・＝（３）、０１．ρ２はプ
ラント内で用いられている廃液の密度が分っているため
既知の値である。従って、演淳器１２における演算式を
（３）式とすることにより、スラッジレベル表示器１４
にはスラッジレベルｈ１が連続的に表示される。Sludge level (distance from the bottom of sludge tank 1 to interface 5 between sludge 3 and water 4) is hl, distance from interface 5 to water surface 8 is h2, density of sludge 3 is ρ1,
If the density of the water 4 is ρ2 and the acceleration of the m force is Q, then the water head pressure P detected by the pressure sensor 10 is: P-Q+ Q h1+D2Qh2 - (1) On the other hand, the water level H detected by the water level detector is , 1-(-hl
+h2...('2J(
If (from formula 21, the sludge level hi is (ρ1-0
2) Q Dt −,02·=(3),01. ρ2 is a known value because the density of the waste liquid used in the plant is known. Therefore, by setting the arithmetic expression in the processor 12 to the expression (3), the sludge level indicator 14
The sludge level h1 is continuously displayed.
以上の如く構成されたスラッジレベル測定装置では、簡
単な構成でタンク内のスラッジのレベルをＩｖｔ的に測
定することができ、かつ、信頼性の高い測定結果を得る
ことができ、故障のおそれもないなど優れた効果を得る
ことができる。The sludge level measuring device configured as described above can measure the level of sludge in a tank in an Ivt manner with a simple configuration, and can obtain highly reliable measurement results without the risk of failure. It is possible to obtain excellent effects such as:
次に、第２図に示す第２実ｔＡ例について説明する。こ
れは、圧力検出手段としてバブラ管１８を備えたバブラ
管式圧力検出Ｈｆ１１９を使用した例である。Next, a second actual example tA shown in FIG. 2 will be explained. This is an example in which a bubbler tube type pressure detection Hf119 equipped with a bubbler tube 18 is used as the pressure detection means.
スラッジタンク１内には水頭圧測定用バブラ管１８及び
密度測定用バブラ管２０を鉛直に配置する。水頭圧測定
用バブラ管１８は下端をスラッジタンク１の底面に近接
させ、密度測定用バブラ管２０の下端は水頭圧測定用バ
ブラ管１８の下端よりΔｈだけ僅か上方に位置させる。Inside the sludge tank 1, a bubbler pipe 18 for measuring water head pressure and a bubbler pipe 20 for density measurement are arranged vertically. The lower end of the bubbler tube 18 for measuring head pressure is located close to the bottom of the sludge tank 1, and the lower end of the bubbler tube 20 for density measurement is positioned slightly above the lower end of the bubbler tube 18 for measuring head pressure by Δh.
水頭圧測定用バブラ管１８及び密度測定用バブラ管２０
には、それぞれ流！１調節器２１．２２を介して計測用
エア供給装置２３を接続し、このエア供給装置２３より
流量調節器２１．２２を通して各バブラ管１８．２０に
エアを供給するように構成する。水頭圧測定用バブラ管
１８１１１１１のエア供給管には水頭圧変換器２４が接
続され、水頭圧測定用バブラ管１８側のエア供給管と密
度測定用バブラ管２０側のエア供給管との間には差圧変
換器２５が接続される。そこで、エア供給装置２３より
エアを供給するとき、水頭圧変換器２４ではスラッジ３
及び水４による水頭圧Ｐを、バブラ管１８の先端から押
出されたエアの背圧として検出し、この検出信号は′ａ
ｎ装ｒ１１２及び除算器２６に入力される。一方、差圧
変換器２５ではスラッジ３の密度ρ１を、両バブラＩ！
１８．２０における背圧の差すなわち差圧ΔＰとして検
出し、この検出信号も演算手段としての演算装置１２及
び除算器２６に入力される。なお、除算器２６には水位
監視装置１６が接続される。Bubbler tube 18 for water head pressure measurement and bubbler tube 20 for density measurement
Each has its own style! A measurement air supply device 23 is connected through one regulator 21.22, and the air supply device 23 is configured to supply air to each bubbler pipe 18.20 through a flow rate regulator 21.22. A head pressure converter 24 is connected to the air supply pipe of the bubbler pipe 1811111 for water head pressure measurement, and between the air supply pipe on the bubbler pipe 18 side for water head pressure measurement and the air supply pipe on the density measurement bubbler pipe 20 side. is connected to the differential pressure converter 25. Therefore, when air is supplied from the air supply device 23, the head pressure converter 24
The head pressure P due to the water 4 is detected as the back pressure of the air pushed out from the tip of the bubbler tube 18, and this detection signal is 'a
It is input to the n unit r112 and the divider 26. On the other hand, the differential pressure converter 25 converts the density ρ1 of the sludge 3 into both bubblers I!
The difference in back pressure at 18.20 is detected as a differential pressure ΔP, and this detection signal is also input to the arithmetic unit 12 and the divider 26 as arithmetic means. Note that the water level monitoring device 16 is connected to the divider 26.
また、スラッジタンク１の上部に設けられた、水位Ｈを
検出する超音波式水位検出器９からの検出信号は、信号
変換器１３で標準信号に変換された後、演算装置１２に
入力される。Further, a detection signal from an ultrasonic water level detector 9 provided at the top of the sludge tank 1 for detecting the water level H is converted into a standard signal by a signal converter 13 and then inputted to the arithmetic unit 12. .
そこで、演算器１２における、スラッジレベルｈ１の算
出は次のように行なわれる。Therefore, calculation of the sludge level h1 in the computing unit 12 is performed as follows.
差圧ΔＰは、
ΔＰ−ρ１・Ｑ・Δｈ ・・・（４）
また水の密度ρ２が約１であることから、前記実施例で
使用した（３）式は、
となり、この（５）式に基いてスラッジレベルｈ１が算
出される。The differential pressure ΔP is ΔP-ρ1・Q・Δh...(4)
Further, since the density ρ2 of water is approximately 1, the equation (3) used in the above embodiment becomes as follows, and the sludge level h1 is calculated based on this equation (5).
従って、この実施例でも第１実施例と同様に、簡単な構
成でタンク内のスラッジのレベルを連続的に測定するこ
とができ、かつ、信頼性の高い測定結果を得ることがで
きる。Therefore, in this embodiment, as in the first embodiment, the level of sludge in the tank can be continuously measured with a simple configuration, and highly reliable measurement results can be obtained.
次に、第３図に示す第３実施例について説明する。Next, a third embodiment shown in FIG. 3 will be described.
スラッジタンク１の周壁下端部には、圧力検出手段とし
て、第２実施例と同様の水頭圧変換器２４をシール機構
２８を介して接続し、それより上方のタンク１周壁には
、水位検出手段として水位変換器２９を、シールｔｉ構
３０を介して接続する。A water head pressure transducer 24 similar to that of the second embodiment is connected to the lower end of the peripheral wall of the sludge tank 1 as a pressure detection means via a seal mechanism 28, and a water level detection means is connected to the peripheral wall of the tank 1 above it. A water level transducer 29 is connected via a seal structure 30.
これにより、水頭圧変換器２４ではスラッジ３及び水４
による水頭圧Ｐを検出することができ、水位変換器２９
では水位Ｈを検出することができる。As a result, the head pressure transducer 24 has sludge 3 and water 4.
The water head pressure P can be detected by the water level converter 29
In this case, the water level H can be detected.
従って、両度換器２４．２９の出力信号に基いて、演算
手段としての演算器１２では前記（３）式によりスラッ
ジレベルｈ、を検出することができる。Therefore, based on the output signals of the bidirectional converters 24 and 29, the sludge level h can be detected by the arithmetic unit 12 as the arithmetic means using equation (3).
この実施例でも第１．第２実施例と同様に、簡単な構成
でタンク内のスラッジのレベルを連続的に測定すること
ができ、かつ、信頼性の高い測定結果を得ることができ
る。In this embodiment as well, the first. As in the second embodiment, the level of sludge in the tank can be continuously measured with a simple configuration, and highly reliable measurement results can be obtained.
以上のように、本発明によれば、簡単な偶成でタンク内
のスラッジのレベルを連続的に測定することができ、か
つ、信頼性の高い測定結果を得ることができ、故障のお
それも少ないスラッジレベル調定装置を提供することが
できる。As described above, according to the present invention, the level of sludge in a tank can be continuously measured with a simple combination, highly reliable measurement results can be obtained, and there is little risk of failure. A sludge level adjustment device can be provided.
第１図は本発明の第１實施例を示すスラッジレベル測定
装置の概略構成図、第２図は第２の実施例を示すスラッ
ジレベル測定！装置の概略構成図、第３図は第３実施例
を示すスラッジレベル測定装置の概略構成図、第４図は
従来例を示すスラッジレベル測定装置の概略構成図であ
る。
１・・・スラッジタンク、３・・・スラッジ、４・・・
水、５・・・境界面、９・・・超音波式水位検出器（水
位検出手段）、１０・・・圧力センサ（圧力検出手段）
、１２・・・演算器、１６・・・演算手段、２４・・・
水頭圧変換器（圧力検出手段）、２９・・・水位変換器
（水位検出手段）。
出願人代理人 弁理士 鈴江武彦
第２図
第３図
第４図Fig. 1 is a schematic configuration diagram of a sludge level measuring device showing a first embodiment of the present invention, and Fig. 2 shows a sludge level measurement device showing a second embodiment! FIG. 3 is a schematic diagram of a sludge level measuring device showing a third embodiment, and FIG. 4 is a schematic diagram of a sludge level measuring device showing a conventional example. 1...Sludge tank, 3...Sludge, 4...
Water, 5... Boundary surface, 9... Ultrasonic water level detector (water level detection means), 10... Pressure sensor (pressure detection means)
, 12... Arithmetic unit, 16... Arithmetic means, 24...
Water head pressure converter (pressure detection means), 29... water level converter (water level detection means). Applicant's representative Patent attorney Takehiko Suzue Figure 2 Figure 3 Figure 4
Claims (4)
ッジのレベルを測定するスラッジレベル測定装置におい
て、タンク内の水位を検出する水位検出手段と、タンク
の底部における水及びスラッジによる水頭圧を検出する
圧力検出手段と、この圧力検出手段で検出された水頭圧
及び水位検出手段で検出された水位に基きタンク内のス
ラッジレベルを算出する演算手段とを具備したことを特
徴とするスラッジレベル測定装置。(1) A sludge level measuring device that measures the level of sludge that has settled at the bottom of a tank separated from water, including a water level detection means that detects the water level in the tank, and a water head due to water and sludge at the bottom of the tank. A sludge comprising a pressure detection means for detecting pressure, and a calculation means for calculating a sludge level in a tank based on the head pressure detected by the pressure detection means and the water level detected by the water level detection means. Level measuring device.
許請求の範囲第１項記載のスラッジレベル測定装置。(2) The sludge level measuring device according to claim 1, wherein the water level detecting means is an ultrasonic water level detector.
圧（Ｐ）及び水位検出手段で検出された水位（Ｈ）に基
き、 ｈ＿１＝［Ｐ／（ρ＿１−ρ＿２）ｇ］−［ρ＿２／（
ρ＿１−ρ＿２）］・Ｈ（但し、ρ＿１はスラッジの密
度、ρ＿２は水の密度、ｇは重力の加速度）の式からタ
ンク内のスラッジレベル（ｈ＿１）を算出する特許請求
の範囲第１項記載のスラッジレベル測定装置。(3) The calculation means calculates h_1=[P/(ρ_1-ρ_2)g]-[ρ_2] based on the head pressure (P) detected by the pressure detection means and the water level (H) detected by the water level detection means /(
ρ_1−ρ_2)]・H (where ρ_1 is the density of sludge, ρ_2 is the density of water, and g is the acceleration of gravity). The sludge level (h_1) in the tank is calculated from the formula: sludge level measuring device.
た特許請求の範囲第１項記載のスラッジレベル測定装置
。(4) The sludge level measuring device according to claim 1, wherein the pressure detecting means is a bubbler tube type pressure detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15609185A JPS6217640A (en) | 1985-07-17 | 1985-07-17 | Apparatus for measuring sludge level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15609185A JPS6217640A (en) | 1985-07-17 | 1985-07-17 | Apparatus for measuring sludge level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6217640A true JPS6217640A (en) | 1987-01-26 |
Family
ID=15620110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15609185A Pending JPS6217640A (en) | 1985-07-17 | 1985-07-17 | Apparatus for measuring sludge level |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6217640A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447323U (en) * | 1987-09-17 | 1989-03-23 | ||
| JPH0391929U (en) * | 1989-12-29 | 1991-09-19 | ||
| EP0697583A1 (en) * | 1993-02-25 | 1996-02-21 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern | Liquid/foam mixture analysis |
| FR2804506A1 (en) * | 2000-01-27 | 2001-08-03 | Smiths Group Plc | MEASURING DEVICE FOR QUANTITIES, IN PARTICULAR FUEL QUANTITIES, AND PROBE COMPRISING THIS DEVICE |
| EP1783466A1 (en) * | 2005-11-07 | 2007-05-09 | M.D.C.E. Bvba | Direct hopper measuring method and device |
| NL2005373C2 (en) * | 2010-09-20 | 2012-03-22 | Ihc Syst Bv | METHOD AND APPARATUS FOR DETERMINING A VOLUME OF A SOFT BED IN A MIXTURE IN A LOADING SPACE. |
| CN113376067A (en) * | 2021-06-08 | 2021-09-10 | 水利部水土保持监测中心 | Portable automatic multi-level open channel sediment measuring device and method |
-
1985
- 1985-07-17 JP JP15609185A patent/JPS6217640A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447323U (en) * | 1987-09-17 | 1989-03-23 | ||
| JPH0436758Y2 (en) * | 1987-09-17 | 1992-08-31 | ||
| JPH0391929U (en) * | 1989-12-29 | 1991-09-19 | ||
| EP0697583A1 (en) * | 1993-02-25 | 1996-02-21 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern | Liquid/foam mixture analysis |
| FR2804506A1 (en) * | 2000-01-27 | 2001-08-03 | Smiths Group Plc | MEASURING DEVICE FOR QUANTITIES, IN PARTICULAR FUEL QUANTITIES, AND PROBE COMPRISING THIS DEVICE |
| EP1783466A1 (en) * | 2005-11-07 | 2007-05-09 | M.D.C.E. Bvba | Direct hopper measuring method and device |
| BE1016840A5 (en) * | 2005-11-07 | 2007-08-07 | M D C E Bvba | DIRECT BEUNMETIC METHOD AND DEVICE. |
| EP2261612A1 (en) * | 2005-11-07 | 2010-12-15 | M.D.C.E. Bvba | Direct hopper measuring method and device |
| NL2005373C2 (en) * | 2010-09-20 | 2012-03-22 | Ihc Syst Bv | METHOD AND APPARATUS FOR DETERMINING A VOLUME OF A SOFT BED IN A MIXTURE IN A LOADING SPACE. |
| WO2012039608A1 (en) * | 2010-09-20 | 2012-03-29 | Ihc Systems B.V. | Method and device for determining a volume of a settled bed in a mixture in a loading space |
| CN113376067A (en) * | 2021-06-08 | 2021-09-10 | 水利部水土保持监测中心 | Portable automatic multi-level open channel sediment measuring device and method |
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