JPS55144523A - Sludge precipitation pipe in sludge volume index unit - Google Patents
Sludge precipitation pipe in sludge volume index unitInfo
- Publication number
- JPS55144523A JPS55144523A JP5319279A JP5319279A JPS55144523A JP S55144523 A JPS55144523 A JP S55144523A JP 5319279 A JP5319279 A JP 5319279A JP 5319279 A JP5319279 A JP 5319279A JP S55144523 A JPS55144523 A JP S55144523A
- Authority
- JP
- Japan
- Prior art keywords
- receiver
- transmitter
- sludge
- reflected
- time
- 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
- 238000001556 precipitation Methods 0.000 title abstract 5
- 239000010802 sludge Substances 0.000 title 2
- 239000007788 liquid Substances 0.000 abstract 3
- 244000144992 flock Species 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000006228 supernatant Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
PURPOSE:To quickly detect the position of a precipitation surface, by providing a transmitter and a receiver above a cylinder containing a detected liquid and by measuring the time difference from the emission of an ultrasonic signal from the transmitter to the reception of the reflected signal by the receiver. CONSTITUTION:A transmitter and a receiver 11 are provided at the upper part of the cylindrical body of a precipitation pipe 7 which contains a detected liquid. An ultrasonic signal is emitted from the transmitter, reflected and received by the receiver. The position of a precipitation surface measured in terms of the time from the emission of the ultrasonic signal to its reception. A time elmination circuit is provided between the receiver and a calculation circuit to eliminate signals for a prescribed time since the beginning of entry of the signals. As a result, the measurement is prevented from being affected by flocks floating on the supernatant part of the detected liquid and only the signal reflected on the precipitation surface can be entered as an input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5319279A JPS55144523A (en) | 1979-04-28 | 1979-04-28 | Sludge precipitation pipe in sludge volume index unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5319279A JPS55144523A (en) | 1979-04-28 | 1979-04-28 | Sludge precipitation pipe in sludge volume index unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55144523A true JPS55144523A (en) | 1980-11-11 |
Family
ID=12936002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5319279A Pending JPS55144523A (en) | 1979-04-28 | 1979-04-28 | Sludge precipitation pipe in sludge volume index unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55144523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912686A (en) * | 1987-04-27 | 1990-03-27 | Gec-Marconi Limited | Sensor apparatus |
-
1979
- 1979-04-28 JP JP5319279A patent/JPS55144523A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912686A (en) * | 1987-04-27 | 1990-03-27 | Gec-Marconi Limited | Sensor apparatus |
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