CN1079048A - Dielectric constant liquid level, interface, temperature, pressure transducer - Google Patents
Dielectric constant liquid level, interface, temperature, pressure transducer Download PDFInfo
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- CN1079048A CN1079048A CN 92103745 CN92103745A CN1079048A CN 1079048 A CN1079048 A CN 1079048A CN 92103745 CN92103745 CN 92103745 CN 92103745 A CN92103745 A CN 92103745A CN 1079048 A CN1079048 A CN 1079048A
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- electrode
- interface
- liquid level
- temperature
- pressure
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Abstract
Being that the pressure of temperature, the liquid of interface, the liquid of a kind of liquid level with liquid, two or more stratified liquid is transformed into electric signal and measures, is according to the different principle design of the electric constant of liquid mediums.Form by equidistant electrode, temperature sensing element, pressure-active element and cable, repeater box.Its advantage: liquid level, the interface of two or more stratified liquid, the temperature of liquid, the pressure that can measure strong acid, highly basic, weak acid, weak base, neutral liquid.Secondary instrument can be used the pointer instrument, single-chip microcomputer or micro-processor controlled digital instrument.
Description
The present invention relates to a kind of liquid level of liquid, the interface of two or more stratified liquid, temperature and pressure of liquid measured, liquid level with liquid, the stratified liquid interface, the temperature and pressure of liquid is transformed into electric signal and measures, be equipped with corresponding secondary instrument and directly measure, also can be equipped with single-chip microcomputer or microcomputer telemeasurement.Advantage is simple in structure, applied range, and long service life, processing technology is simple, and cost is low, and is easy to use, and the measuring accuracy height is stable.
Details are as follows in conjunction with the embodiments for the present invention's formation:
Figure is dielectric constant liquid level, interface, temperature, pressure transducer schematic diagram.Wherein 1, pressure-active element (diffuse si sensor, sapphire sensor, alloy thin film pressure sensor, strain gauge pressure sensor etc.); 2, temperature sensing element (thermoelectric corner, platinum resistance, semiconductor etc.); 3, common electrode (metal tube, metal tape, tinsel, metal film etc.); 4, potential electrode (1., 2., 3. ... electrode); 5, insulator; 6, I/O cable; 7, repeater box (interior attaching line terminals, single-chip microcomputer signal Processing, on-off circuit etc.) or secondary instrument; 8, teletransmission output, input lead.
Processing technology: can adopt (1) metal material edge electrode, temperature sensing element, pressure-active element according to applied environment and condition, must insulate between electrode and the metal material; (2) nonmetallic materials metal inlaying electrode, temperature sensing element, pressure-active element; (3) press the processing cable processes; (4) with various macromolecular materials or nonmetallic materials compacting; (5) being processed into single electrode, bipolar electrode or several electrodes with macromolecular material or nonmetallic materials composes in parallel then; (6) various insulating material direct pourings; (7) with producing the printed-wiring board (PWB) processes.
Claims (6)
1, dielectric constant liquid level, interface, temperature, pressure transducer are widely used in liquid level, interface, the temperature of any liquid such as water conservancy, electric power, oil, chemical industry, metallurgy, iron and steel, the measurement of pressure.Be that a kind of sunk is installed, join corresponding secondary instrument and control, regulate, measure or carry out the comprehensive control of computer network.
Feature of the present invention is made up of equidistant electrode, temperature sensing element, pressure-active element, cable and the repeater box of several mutual insulatings, and electrode what by measuring accuracy and range decision.
For example: measuring accuracy＜1mm range 100mm is made up of 100 equidistant electrodes and a common electrode (model that has is without common electrode).
Measuring accuracy＜10mm, range are 5000mm, then are made up of 500 equidistant electrodes and a common electrode (model that has is without common electrode).Measuring accuracy＜0.1mm＜0.2mm＜0.5mm＜1mm＜2mm＜5mm＜10mm＜20mm＜50mm ... measuring accuracy and range determine according to the production practices needs.
2, dielectric constant liquid level, interface, temperature, pressure transducer according to claim 1, because working medium difference, add and select electrode material and electrode shape difference man-hour for use, the material of fixed electorde is also different, as: electrode can be selected for use any water-fast when measuring oil-water interface, liquid level, temperature, pressure, the oil resistant metal all can, water-fast as long as the material of fixed electorde and sensitive element is selected for use, the material of oil resistant gets final product.
When the liquid level of measurement strong acid, highly basic medium, interface, temperature, pressure, electrode and sensitive element are selected the material of anti-strong acid, highly basic for use, and fixedly the material of sensitive element and electrode also must be anti-strong acid, highly basic; When measuring high temperature and cryogenic media, electrode, sensitive element, the fixed electorde material selection is high temperature resistant and cryogenic material.Electrode adopts the ordinary electrode shape to get final product when measuring conducting medium, semiconduction medium liquid level, interface, when the liquid level of measurement semiconduction medium, insulating medium, interface, must select equal and opposite in direction for use, electrode parallel to each other.
3, liquid level, the interface of measuring conducting medium, semiconduction medium adopts resistance, electric current, voltage between the potential electrode to realize.Measure semiconduction medium, insulating medium, then adopt the electric capacity between potential electrode to realize measuring liquid level or interface.
4, the interface of a measuring liquid level or stratified liquid only needs equidistant electrode, fixed electorde material, cable and repeater box.
5, repeater box is the electric signal of electrode input to be handled become long-distance transmissions behind the standard signal.
6, the processing technology of dielectric constant liquid level, interface, temperature, pressure transducer adopts according to applied environment and condition:
(1) metal material edge electrode, temperature sensing element, pressure-active element must insulate between metal material and the electrode;
(2) nonmetallic materials metal inlaying electrode, temperature sensing element, pressure-active element;
(3) press the processing cable processes;
(4) with various macromolecular materials or nonmetallic materials compacting;
(5) be processed into single electrode, bipolar electrode or several electrodes with macromolecular material or nonmetallic materials, compose in parallel then;
(6) various insulating material direct pourings;
(7) with producing the printed-wiring board (PWB) processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103745 CN1079048A (en) | 1992-05-21 | 1992-05-21 | Dielectric constant liquid level, interface, temperature, pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103745 CN1079048A (en) | 1992-05-21 | 1992-05-21 | Dielectric constant liquid level, interface, temperature, pressure transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1079048A true CN1079048A (en) | 1993-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92103745 Pending CN1079048A (en) | 1992-05-21 | 1992-05-21 | Dielectric constant liquid level, interface, temperature, pressure transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1079048A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448787C (en) * | 2007-01-22 | 2009-01-07 | 浙江大学 | Gas-lifting type self-circulating anaerobic bioreactor |
| CN102564515A (en) * | 2012-02-10 | 2012-07-11 | 北京中油联自动化技术开发有限公司 | Electronic fusion measurement interface level transmitter and measuring method thereof |
| CN102713536A (en) * | 2011-01-14 | 2012-10-03 | 丰田自动车株式会社 | Fluid state detection sensor |
| CN109459112A (en) * | 2018-09-21 | 2019-03-12 | 浙江大学宁波理工学院 | The granulated fertilizer allowance detector of fertilizer distributor |
-
1992
- 1992-05-21 CN CN 92103745 patent/CN1079048A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448787C (en) * | 2007-01-22 | 2009-01-07 | 浙江大学 | Gas-lifting type self-circulating anaerobic bioreactor |
| CN102713536A (en) * | 2011-01-14 | 2012-10-03 | 丰田自动车株式会社 | Fluid state detection sensor |
| CN102713536B (en) * | 2011-01-14 | 2015-01-14 | 丰田自动车株式会社 | Fluid state detection sensor |
| CN102564515A (en) * | 2012-02-10 | 2012-07-11 | 北京中油联自动化技术开发有限公司 | Electronic fusion measurement interface level transmitter and measuring method thereof |
| CN109459112A (en) * | 2018-09-21 | 2019-03-12 | 浙江大学宁波理工学院 | The granulated fertilizer allowance detector of fertilizer distributor |
| CN109459112B (en) * | 2018-09-21 | 2021-03-09 | 浙江大学宁波理工学院 | Granular fertilizer allowance detection device of fertilizer distributor |
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