CN2302501Y - Multi-electrode capacitance sensor - Google Patents
Multi-electrode capacitance sensor Download PDFInfo
- Publication number
- CN2302501Y CN2302501Y CN 97219317 CN97219317U CN2302501Y CN 2302501 Y CN2302501 Y CN 2302501Y CN 97219317 CN97219317 CN 97219317 CN 97219317 U CN97219317 U CN 97219317U CN 2302501 Y CN2302501 Y CN 2302501Y
- Authority
- CN
- China
- Prior art keywords
- ceramic pipe
- electrode slice
- outer housing
- capacitance sensor
- sensor
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a multi-electrode capacitance sensor. The utility model is provided with a casing of the sensor and both ends of the casing are provided with flanges; the inner part of the casing is provided with a ceramic pipe and the ceramic pipe is fixed by a fixed pressing ring; a shockproof sealing ring is arranged between the fixed pressing ring and the end surface of the ceramic pipe. The outside of the ceramic pipe is provided with an electrode sheet; an insulating layer is arranged between the outside of the electrode sheet and the inside of the casing of the sensor; the casing of the sensor is provided with a base of a signal processor; the electrode sheet is connected with the base of the signal processor. The utility model has the advantages of simple structure, low cost, convenient manufacture, and high response speed. The utility model can be suitable for the production processes of the wide bore pneumatic conveying operation.
Description
The utility model relates to sensor, relates in particular to multielectrode capacitance sensor.
Dual-Phrase Distribution of Gas olid is the flow of matter that has gas phase and solid phase simultaneously.The Dual-Phrase Distribution of Gas olid phenomenon extensively exists in nature and commercial production.For example, flue dust disperse in natural desert sand, the air; In chemical industry, the pneumatic conveying drying of washing powder, milk powder, the fluidized reaction in the solid state fluidizing bed; The strength of coal dust is carried in metallurgy, power industry, the Boiling Combustion of coal, the fluidization roast of mineral, magnetohydrodynamic generation; And the strength of materials such as the cereal in the food, building trade, salt, cement is carried; Polyester section strength in the textile of chemical fibre industry is carried; The gas-particle stream that the engine mouth is penetrated etc. all are the Dual-Phrase Distribution of Gas olid phenomenons.
Gas-solid Two-phase Flow is compared with single-phase flowing, and have following characteristics: (1) diphasic flow has multiple flow pattern.(2) on the two-phase interface interaction force is arranged.(3) two alternately have relative slip-slippage.Except that the mechanical loss that the internal friction of each phase causes, also be accompanied by the additional mechanical power loss that causes owing to alternate mutual collision etc.(4) two alternate have conduct heat and transport phenomenon.
The complicacy of Dual-Phrase Distribution of Gas olid mainly shows to have multiple flow pattern in the flow process.Flow pattern is meant the distribution situation of two-phase material when flowing.Flow pattern is not only relevant with the characteristic of media such as the particle size size of viscosity, density and the solid of gas, shape, density, also relevant with the flow parameters such as content of pressure, speed, flow and the solid of gas, but also to be subjected to the influence of the flowing environment such as geometric configuration, tube wall roughness, piping erection mode of flow duct.
The reason that the Dual-Phrase Distribution of Gas olid detection difficulty is big is its complex flow.When Dual-Phrase Distribution of Gas olid was flowed, two practise physiognomy not only changed constantly, and is accompanied by the exchange of matter and energy, even chemical reaction.This characteristics make that the detection of gas-solid diphasic stream parameter is extremely difficult.
It is several that the Dual-Phrase Distribution of Gas olid concentration detection method mainly contains direct method, optical method and electric method etc.The method of measuring two-phase flow disperse phase concentration in the electric method is more, and available resistance, electricity are led and method such as electric capacity.
The purpose of this utility model provides a kind of simple in structure, multielectrode capacitance sensor that response speed is fast.
The utility model is taked following measures in order to achieve the above object: it has sensor outer housing, be provided with flange at the sensor outer housing two ends, in sensor outer housing, be provided with ceramic pipe, ceramic pipe two is established end fixedly trim ring, fixedly trim ring is fixed on two method inboards, fixedly be provided with shockproof O-ring seal between trim ring and the ceramic pipe end face, the ceramic pipe outside is provided with electrode slice, between the electrode slice outside and sensor outer housing inboard, be provided with insulation course, be provided with the signal processor pedestal on sensor outer housing, electrode slice and signal processor pedestal join.
The utility model is simple in structure, cheap, easy to make, response speed is fast, can be applicable to production runes such as bigbore strength conveying, can be used for the abominable industry spot of environment, with cross-sectional distribution figure in the non-contact measurement pipe.
Elaborate below in conjunction with accompanying drawing.
Accompanying drawing is the multielectrode capacitance sensor structural representation.
The universal electrode capacitive transducer has sensor outer housing 6, be provided with flange 4 at the sensor outer housing two ends, in sensor outer housing, be provided with ceramic pipe 3, the ceramic pipe two ends are provided with fixedly trim ring 2, fixedly trim ring is fixed on two method inboards, fixedly be provided with shockproof O-ring seal 1 between trim ring and the ceramic pipe end face, the ceramic pipe outside is provided with electrode slice 8, between the electrode slice outside and sensor outer housing inboard, be provided with insulation course, be provided with signal processor pedestal 5 on sensor outer housing, electrode slice and signal processor pedestal join.The length of ceramic pipe is 100～400mm, and internal diameter is 25～200mm, and ceramic pipe thickness is 5～8mm.Electrode slice is 2～16, and the electrode subtended angle is 20～135 °, and electrode slice length is 60～300mm, and the internal diameter of ceramic pipe is generally 80～180mm, and electrode slice is generally 6,8,12,16.Ceramic pipe adopts 99 porcelain, Al
2O
3Content is higher than 99%, iron oxide content less than 0.2%, the porosity is less than 0.2%.The electrode slice material is a beryllium-bronze material, and outside surface must be handled through phosphatization, and applies with silver layer.
During making, the ceramic pipe after cleaning is put into 60 ℃ of baking ovens takes out after two hours, first, the second glue of KD-504A glue is carried out 2: 1 proportionings, evenly being coated on needs subsides electrode place, glue thickness≤0.1mm, stick electrode slice after, wrap up in glass insulation cloth outward and be cured.Tensile strength palpus 〉=the 40kgf/cm of electrode slice after the splicing and ceramic pipe
2, respectively draw a high temperature resistant wire of wrapping up in teflon outward on each electrode slice, through the signal processor pedestal, receive testing circuit.Ceramic pipe is fixed in the sensor outer housing with fixing trim ring, and the sensor outer housing two ends are provided with flange, fixedly are provided with the shockproof O-ring seal of rubber between trim ring and the ceramic pipe end face.
Principle of the present utility model is: when the Dual-Phrase Distribution of Gas olid body was flowed through between capacitor plate responsive, the electric capacity between these two electrodes can change thereupon.Because the specific inductive capacity of gas and particle is different, when the granule density of the two-phase flow in the capacitive transducer of flowing through changes, can cause the variation of fluid effective dielectric constant, thereby cause changes in capacitance, promptly the size of capacitance can reflect the variation of granule density.
Claims (5)
1. multielectrode capacitance sensor, it is characterized in that it has sensor outer housing [6], be provided with flange [4] at the sensor outer housing two ends, in sensor outer housing, be provided with ceramic pipe [3], the ceramic pipe two ends are provided with fixedly trim ring [2], fixedly trim ring is fixed on two flange inboards, fixedly be provided with shockproof O-ring seal [1] between trim ring and the ceramic pipe end face, the ceramic pipe outside is provided with electrode slice [8], between the electrode slice outside and sensor outer housing inboard, be provided with insulation course, be provided with signal processor pedestal [5] on sensor outer housing, electrode slice and signal processor pedestal join.
2. a kind of multielectrode capacitance sensor according to claim 1, the length that it is characterized in that said ceramic pipe is 100～400mm, and internal diameter is 25～200mm, and ceramic pipe thickness is 5～8mm.
3. a kind of multielectrode capacitance sensor according to claim 1 and 2 is characterized in that said electrode slice is 2～16, and the electrode subtended angle is 20～135 °, and electrode slice length is 60～300mm.
4. a kind of multielectrode capacitance sensor according to claim 1 and 2 is characterized in that said ceramic pipe adopts 99 porcelain, Al
2O
3Content is higher than 99%, iron oxide content less than 0.2%, the porosity is less than 0.2%.
5. a kind of multielectrode capacitance sensor according to claim 1 and 2 is characterized in that said electrode slice material is a beryllium-bronze material, and outside surface must be handled through phosphatization, and applies with silver layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97219317 CN2302501Y (en) | 1997-06-25 | 1997-06-25 | Multi-electrode capacitance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97219317 CN2302501Y (en) | 1997-06-25 | 1997-06-25 | Multi-electrode capacitance sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2302501Y true CN2302501Y (en) | 1998-12-30 |
Family
ID=33935379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97219317 Expired - Lifetime CN2302501Y (en) | 1997-06-25 | 1997-06-25 | Multi-electrode capacitance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2302501Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990537A (en) * | 2015-07-31 | 2015-10-21 | 北京信息科技大学 | Inclinometer sensing head structure, and making technology and signal processing circuit thereof |
-
1997
- 1997-06-25 CN CN 97219317 patent/CN2302501Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990537A (en) * | 2015-07-31 | 2015-10-21 | 北京信息科技大学 | Inclinometer sensing head structure, and making technology and signal processing circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |