CN208156052U - A kind of electron number densitiy measurement two-probe arrangement - Google Patents
A kind of electron number densitiy measurement two-probe arrangement Download PDFInfo
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- CN208156052U CN208156052U CN201820756884.7U CN201820756884U CN208156052U CN 208156052 U CN208156052 U CN 208156052U CN 201820756884 U CN201820756884 U CN 201820756884U CN 208156052 U CN208156052 U CN 208156052U
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Abstract
The utility model discloses a kind of electron number densitiys to measure two-probe arrangement, which is characterized in that including：Double probes with parallel dipolar configuration；Aluminum oxide ceramic sheath, is equipped with the doubled via for accommodating double probes, and double probes are through in the doubled via of aluminum oxide ceramic sheath；It is interior to be equipped with the cavity for testing cable for accommodating aluminum oxide ceramic sheath bottom and double probes for the probe support of double probes to be fixedly mounted；The double probe pin upper ends stretch out aluminum oxide ceramic sheath, and double probe lower ends stretch out doubled vias and exposed are equipped with insulating sheath in probe support and in exposed portion.The utility model uses metal molybdenum for probe material, have matched diameter, the probe spacing, the outer dimension of working end length and aluminum oxide ceramic sheath of double probes, double probes are sintered to fix using aluminum oxide ceramic, it is safe operation, reliable so that the present apparatus have the characteristics that it is reliable and stable.
Description
Technical field
The utility model relates to a kind of measurements for plasma wind tunnel plasma jet stream electron number densitiy, more
It says to body, the utility model relates to a kind of electron number densitiys to measure two-probe arrangement.
Background technique
The mechanism phenomenon of high temperature complex flowfield and the 3-D whole audience of structure shows, temperature and gas component and electronics
The accurate measurement of number density is to the design and development of aircraft, material selection, observing and controlling, guidance, alarm and leading between ground
Query topic etc. all seems especially basic and crucial.Other than there is generality in modern Aviation, space flight and military affairs, in industry
It is also widely present with civilian aspect, such as：Energy project, high-temperature machining, processing, welding, surface treatment and smelting etc..So
And such temperature is up to thousands of degree even degree up to ten thousand, unstable on the time, spatial distribution high temperature complex flowfield heterogeneous electricity
Very good solution is not yet received in subnumber density measure so far.Under the conditions of hypersonic flight, aircraft high ambient temperatures gas is produced
Strong vibration, dissociation and ionization have been given birth to, plasma sheath is formd.Various tests, control, navigation, communication electromagnetism signal
When across plasma sheath, due to electronic, electronics with the background particle in plasma sheath by colliding, by kinetic energy
It is transmitted to background particle, results in the decaying of incident electromagnetic wave self-energy in this way；In addition, electromagnetic wave meeting in plasma sheath
Faraday rotation is generated, so that polarization be caused to be distorted.Just because of the decaying and distortion of electromagnetic signal, so as to cause aircraft with
Extraneous communication disruption, i.e. " black barrier " problem.Therefore, it is measured based on plasma wind tunnel electron number densitiy, carries out plasma
Sheaths electromagnetic property research, all has important practical significance to military and civilian space communication.In this case it is necessary to
A kind of reliable and stable electron number densitiy measurement two-probe arrangement is provided, there is high temperature resistant, safe operation, reliable characteristic, together
When can be realized jamproof effect.
Utility model content
One purpose of the utility model is to solve at least the above problems and/or defect, and provide and at least will be described later
The advantages of.
In order to realize these purposes and other advantages according to the present utility model, it is double to provide a kind of electron number densitiy measurement
Probe unit, including：
Double probes with parallel dipolar configuration；
Aluminum oxide ceramic sheath, is equipped with the doubled via for accommodating double probes, and double probes are through three oxygen
In the doubled via for changing two aluminium ceramic sheaths；
For the probe support of double probes to be fixedly mounted, in be equipped with accommodate aluminum oxide ceramic sheath bottom and
The cavity of the test cable of double probes；Double probe pin upper ends stretch out aluminum oxide ceramic sheath, and double probe lower ends are stretched
Out doubled via and it is exposed in probe support and exposed portion be equipped with insulating sheath.
Preferably, double probe outer diameters be 1mm~5mm, probe spacing be 1mm~5mm, double probes high frequency etc. from
Effective active length in daughter jet stream is 15~20mm.
Preferably, double probe outer diameters are 1mm, and probe spacing 3mm, double probes are in high-frequency plasma jet stream
Effective active length be 15mm.
Preferably, the tail portion of the test cable and pair probes is welded and fixed, and the test cable is through probe branch
Seat is simultaneously connected to electron number densitiy acquisition analysis system.
Preferably, double probes are fixed with aluminum oxide ceramic sheath by high temperature sintering；Double probes
Material is metal molybdenum；Aluminum oxide ceramic sheath upper end is pyramidal structure, and lower end is cylindrical structure.
Preferably, the insulating sheath is insulating glass cloth, is protected by high-temp glue and the aluminum oxide ceramic
The tail portion of set and double probes is adhesively fixed.
Preferably, it is disposed with ceramic fibre in the probe support cavity, passes through the interior of high-temp glue and probe support
Side bonds are fixed.
Preferably, aluminum oxide ceramic sheath bottom and the junction of probe support are to be detachably connected, institute
State that be detachably connected be fin to be equipped with by aluminum oxide ceramic sheath bottom, and probe support and aluminum oxide ceramic are protected
The junction for covering bottom is equipped with corresponding groove, and the fin, which is stuck in groove, to be attached.
Preferably, the probe rest base is connected through a screw thread water cooling plant, and the water cooling plant is arranged in water cooling
It the arrival end of bracket and is fixed on movement mechanism by screw rod, the water cooling plant has longitudinal through the hollow of test cable
Structure.
The utility model is include at least the following beneficial effects：According to the flow field characteristic of plasma wind tunnel, double spies are had matched
The diameter of needle, probe spacing, the outer dimension of working end length and aluminum oxide ceramic；Probe is using three oxidations two simultaneously
Aluminium ceramic post sintering, it is safe operation, reliable；In addition, probe can be automatically controled using device realization positioning and movement is quickly scanned,
It is convenient to operate.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention：
Fig. 1 is the longitudinal profile structure schematic that electron number densitiy provided by the utility model measures two-probe arrangement；
Fig. 2 is the longitudinal profile structure that electron number densitiy provided by the utility model measures two-probe arrangement and water cooling plant
Schematic diagram；
Fig. 3 is the knot for the aluminum oxide ceramic sheath that electron number densitiy provided by the utility model measures two-probe arrangement
Structure schematic diagram；
Fig. 4 is the structural schematic diagram for the probe support that electron number densitiy provided by the utility model measures two-probe arrangement.
In figure, 1, double probes, 2, aluminum oxide ceramic sheath, 3, insulating glass cloth, 4, test cable, 5, probe branch
Seat, 6, ceramic fibre, 7, water cooling plant, 8, cooling water channel, 9, water inlet, 10, water outlet, 11, fin, 12, groove.
Specific embodiment：
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
As shown in Figs. 1-2, a kind of electron number densitiy of the utility model measures two-probe arrangement, including：With parallel double
Double probes 1 of pole structure；Aluminum oxide ceramic sheath 2 is equipped with the doubled via for accommodating double probes 1, double probes 1
Through in the doubled via of aluminum oxide ceramic sheath 2；For the probe support 5 of double probes 1 to be fixedly mounted, interior be equipped with is held
Receive 2 bottom of aluminum oxide ceramic sheath and double probes 1 test cable 4 cavity；1 upper end of double probes is stretched out
Doubled vias and exposed in probe support 5 and in exposed portion are stretched out in aluminum oxide ceramic sheath 2, double 1 lower ends of probe
Equipped with insulating sheath.
In the electron number densitiy measurement two-probe arrangement of the utility model, when assembling, double probes 1 are through three oxidations two
The doubled via of aluminium ceramic sheath 2, double probes 1 are fixed with aluminum oxide ceramic sheath 2 by ceramic post sintering, and are matched certain
Probe spacing, double 1 upper ends of probe stretch out aluminum oxide ceramic sheaths 2, and exposed in plasma jet, have
Certain effective active length, the other end stretch out doubled via and it is exposed in probe support 5 and exposed portion be equipped with insulation shield
Set., by being welded and fixed, there is insulating sheath in the tail portion of double probes 1 in weld, the insulating sheath passes through with test cable 4
High-temp glue and the tail portion of aluminum oxide ceramic sheath 2 and double probes 1 are adhesively fixed.It is empty to test 4 penetration probe support of cable 5
Chamber, and connect electron number densitiy acquisition analysis system.When test, the probe or conductive bar of double probes 1 are by induction plasma
The situation of change of electric current and voltage on double probes is transmitted to electron number densitiy acquisition by the electron number in body jet stream, test cable 4
Thus analysis system obtains the VA characteristic curve of double probes 1.In the one-point measurement of double probes 1, parallel dipolar configuration energy
More electron numbers in plasma jet are enough received, so that result has generality and accuracy.Meanwhile double probes 1
It is fixed with aluminum oxide ceramic sheath 2 by ceramic post sintering, so that device is more stable, in addition, aluminum oxide ceramic is protected
The non-working surface of 2 pairs of set double probes 1 carries out solar heat protection and the protection that is electrically insulated, and has high temperature resistance, so that device is reliable and stable,
Strong interference immunity.
In another example, double 1 outer diameters of probe are 1mm~5mm, and probe spacing is 1mm~5mm, and double probes 1 are in height
Effective active length in frequency plasma jet is 15~20mm.According to the flow field characteristic of plasma wind tunnel, have matched double
Diameter, probe spacing, the working end length of probe 1, to realize that the measurement of electron number densitiy in plasma jet provides necessity
Condition.
In another example, double 1 outer diameters of probe are 1mm, probe spacing 3mm, and double probes 1 are in high frequency plasma
Effective active length in body jet stream is 15mm.Using 1 outer diameter of double probes of this specification, probe spacing and effectively work
Length, so that double probes 1 with parallel dipolar configuration can collect more electron numbers in plasma jet, so that
The electron number densitiy that double probes 1 measure in plasma jet reaches maximization, so that measurement structure is more accurate, steady
It is fixed.
In another example, the tail portion of the test cable 4 and double probes 1 is welded and fixed, and the test cable passes through 4 and is through at
Probe support 5 is simultaneously connected to electron number densitiy acquisition analysis system.In this way, make the tail for testing cable 4 and double probes 1
Portion becomes an entirety, and can reduce the loss of electronics, the sensitivity of enhancing electric signal transmitting in weld.
In another example, double probes 1 are fixed with aluminum oxide ceramic sheath 2 by high temperature sintering；It is described double
The material of probe 1 is metal molybdenum；2 upper end of aluminum oxide ceramic sheath is pyramidal structure, and lower end is cylindrical structure.It adopts
Larger with work function, fusing point is higher, and the lesser metal molybdenum of sputtering raste realizes the Gao Rong of probe material as probe material
Point, function resistant to high temperature；Aluminum oxide ceramic sheath 2 carries out solar heat protection and the protection that is electrically insulated to the non-working surface of double probes 1, and
With high temperature resistance；The temperature of ceramic high temperature sintering is 1300~2000 DEG C, and the two is in such a way that high temperature sintering is fixed, energy
Enough inhibit metal molybdenum carbonization and the drawbacks of reduce electric conductivity, while can prevent electric conductivity inhomogenousization of double probes from showing
As.It uses upper end for taper and lower end is the integrated structure of cylindrical body and the design of size, have very strong mechanical property, use
Performance stable, easy for installation.
In another example, the insulating sheath is insulating glass cloth 3, is made pottery by high-temp glue and the aluminum oxide
The tail portion of porcelain sheath 2 and double probes 1 is adhesively fixed.Insulation of the insulating glass cloth 3 for abutting edge and test cable 4, prevents
The only loss of electronic current, at the same insulating glass cloth 3 have insulation, insulation, it is corrosion-resistant, do not burn, the property such as high temperature resistant, high intensity
Energy.
In another example, it is disposed with ceramic fibre 6 in 5 cavity of probe support, passes through high-temp glue and probe branch
The medial surface of seat 5 is adhesively fixed.The ceramic fibre 6 is a kind of fibrous light refractory material, have light-weight, high temperature resistant,
The advantages that thermal stability is good, thermal conductivity is low, specific heat is small and mechanical resistant shakes, it is fine using ceramics in the surrounding of 5 cavity of probe support
Dimension 6, can play insulated heat effect.
As shown in Figs 1-4, in another example, the connection of aluminum oxide ceramic sheath 2 bottom and probe support 5
Place is is detachably connected, and described be detachably connected is that fin 11 is equipped with by 2 bottom of aluminum oxide ceramic sheath, and probe
Support 5 is equipped with corresponding groove 12 with the junction of 2 bottom of aluminum oxide ceramic sheath, and the fin 11 is stuck in groove 12
Inside it is attached.It connects in this way, can guarantee the smooth transition of junction, seamless requirement, to prevent heat
Air-flow, which seals in probe support 5, burns test cable 4.
As shown in Fig. 2, 5 bottom of probe support is connected through a screw thread water cooling plant 7, the water in another example
Device for cooling 7 is arranged in the arrival end of water cooled holder and is fixed on movement mechanism by screw rod, and the water cooling plant 7 has longitudinal
Through the hollow structure of test cable 4.Test the hollow structure that cable 4 passes through the water cooling plant 7, the bottom of water cooling plant 7
Equipped with water inlet 9 and water outlet 10, cooling water channel 8, the cooling water are equipped with above the water inlet 9 and the connector of water outlet 10
Recirculated water can be filled in road 8, so that carrying out cooling protection to test cable 4.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (9)
1. a kind of electron number densitiy measures two-probe arrangement, which is characterized in that including：
Double probes with parallel dipolar configuration；
Aluminum oxide ceramic sheath, is equipped with the doubled via for accommodating double probes, and double probes aoxidize two through three
In the doubled via of aluminium ceramic sheath；
For the probe support of double probes to be fixedly mounted, interior be equipped with accommodates aluminum oxide ceramic sheath bottom and double spies
The cavity of the test cable of needle；Double probe pin upper ends stretch out aluminum oxide ceramic sheath, and double probe lower ends are stretched out double
Through-hole and it is exposed in probe support and exposed portion be equipped with insulating sheath.
2. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that double probe outer diameters are 1mm
~5mm, probe spacing are 1mm~5mm, and effective active length of double probes in high-frequency plasma jet stream is 15~20mm.
3. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that double probe outer diameters are 1mm,
Probe spacing is 3mm, and effective active length of double probes in high-frequency plasma jet stream is 15mm.
4. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that the test cable and double probes
Tail portion be welded and fixed, the test cable is through probe support and is connected to electron number densitiy acquisition analysis system.
5. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that double probes and three oxidations two
Aluminium ceramic sheath is fixed by high temperature sintering；The material of double probes is metal molybdenum；On the aluminum oxide ceramic sheath
End is pyramidal structure, and lower end is cylindrical structure.
6. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that the insulating sheath is insulation glass
Glass cloth is adhesively fixed by high-temp glue and the tail portion of the aluminum oxide ceramic sheath and double probes.
7. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that cloth in the probe support cavity
It is equipped with ceramic fibre, is adhesively fixed by high-temp glue and the medial surface of probe support.
8. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that the aluminum oxide ceramic shield
Set bottom and the junction of probe support are to be detachably connected, and described be detachably connected is by aluminum oxide ceramic sheath bottom
Portion is equipped with fin, and probe support is equipped with corresponding groove with the junction of aluminum oxide ceramic sheath bottom, described convex
Rib is stuck in groove and is attached.
9. electron number densitiy as described in claim 1 measures two-probe arrangement, which is characterized in that the probe rest base passes through
It is threadedly coupled water cooling plant, the water cooling plant is arranged in the arrival end of water cooled holder and is fixed on movement mechanism by screw rod
On, the water cooling plant has longitudinal hollow structure through test cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820756884.7U CN208156052U (en) | 2018-05-21 | 2018-05-21 | A kind of electron number densitiy measurement two-probe arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820756884.7U CN208156052U (en) | 2018-05-21 | 2018-05-21 | A kind of electron number densitiy measurement two-probe arrangement |
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| CN208156052U true CN208156052U (en) | 2018-11-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813383A (en) * | 2019-01-28 | 2019-05-28 | 中国石油天然气股份有限公司 | Method and apparatus for measuring probe, assembly and oil phase volume flow and oil holdup |
| CN111432542A (en) * | 2020-03-02 | 2020-07-17 | 辽宁工业大学 | Double-probe detection device and detection method for discharge state in welding arc |
| CN112213069A (en) * | 2020-10-12 | 2021-01-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Flow field calibration and measurement bent frame with cooling structure for hypersonic high-temperature wind tunnel |
| CN113484406A (en) * | 2021-07-21 | 2021-10-08 | 南京工程学院 | Material internal defect detection device and defect detection method thereof |
-
2018
- 2018-05-21 CN CN201820756884.7U patent/CN208156052U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813383A (en) * | 2019-01-28 | 2019-05-28 | 中国石油天然气股份有限公司 | Method and apparatus for measuring probe, assembly and oil phase volume flow and oil holdup |
| CN109813383B (en) * | 2019-01-28 | 2020-08-11 | 中国石油天然气股份有限公司 | Measuring assembly, and measuring method and device for oil phase volume flow and oil holdup |
| CN111432542A (en) * | 2020-03-02 | 2020-07-17 | 辽宁工业大学 | Double-probe detection device and detection method for discharge state in welding arc |
| CN112213069A (en) * | 2020-10-12 | 2021-01-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Flow field calibration and measurement bent frame with cooling structure for hypersonic high-temperature wind tunnel |
| CN113484406A (en) * | 2021-07-21 | 2021-10-08 | 南京工程学院 | Material internal defect detection device and defect detection method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |