CN107228829B - The on-Line Monitor Device and method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel - Google Patents
The on-Line Monitor Device and method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel Download PDFInfo
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- CN107228829B CN107228829B CN201710423845.5A CN201710423845A CN107228829B CN 107228829 B CN107228829 B CN 107228829B CN 201710423845 A CN201710423845 A CN 201710423845A CN 107228829 B CN107228829 B CN 107228829B
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- krypton
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Abstract
The on-Line Monitor Device and method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel, it is related to the on-line monitoring technique of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel, in order to meet the monitoring requirements of the degree of ionization in hall thruster discharge channel.Device includes light pipe, optical fiber and spectrometer；The side wall of hall thruster discharge channel is provided with axial test seam, the axial test seam of light pipe insertion, and light pipe is used to for the light in discharge channel being directed into optical fiber, and optical fiber connects spectrometer.Using the krypton atomic spectral line intensity of spectrometer measurement 805.95nm, 785.48nm, 760.15nm and 758.74nm, according to the temperature and krypton atomic density of krypton atomic spectral line Strength co-mputation electronics.The present invention is suitable for electronics and atomic parameter in monitoring discharge channel.
Description
Technical field
The present invention relates to the on-line monitoring techniques of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel.
Background technique
As satellite puts forward higher requirements the service life, the service life of Satellite Engine, which improves, becomes key.Traditional satellite
Chemical thruster, thrust is big, but specific impulse is small, and the raising thruster service life must just increase the chemical fuel of satellite carrying, to increase
Satellite launch cost is added and payload can be reduced.Compared with traditional chemical thruster, electric thruster have it is small in size,
Light weight, than leaping high and the advantages such as the service life is long, can reduce satellite launch cost and can satisfy the life requirements of satellite, at
For the hot spot of various countries' research.
At present based on hall thruster and ion thruster, there are up to a hundred electric propulsion devices to be applied on satellite, it is main
To be applied to execute the tasks such as Satellite Orbit Maneuver, gesture stability, the holding of north and south track.Chinese hall thruster has also carried satellite
Validating in orbit success, groundwork mechanism is: applying axial electric field between the anode and cathode of engine, is produced by electrified coil
The magnetic field of raw radial direction, electronics are fettered by magnetic field, are done circumferential Hall drift, are collided, generate with the neutral atom in channel
Ion, ion generate thrust by electric field acceleration high speed ejection.It include neutrality in the plume that hall thruster ejects
Gas, monovalent ion, divalent ion and electronics.
In the hall thruster course of work, electronics and neutral gas ionization by collision generate ion, and ion acceleration, which sprays, to be produced
Raw thrust.Wherein the impact ionization process of electronics and ion is particularly significant to the influence of the working performance of hall thruster.
The energy and krypton atomic density of electronics directly affect ionization process, therefore to electronics and atomic parameter in hall thruster channel
Diagnosis detection can reflect degree of ionization in discharge channel.
Summary of the invention
The purpose of the invention is to meet the monitoring requirements of the degree of ionization in hall thruster discharge channel, to mention
For the on-Line Monitor Device and method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel.
The on-line monitoring of electronics and atomic parameter fills in a kind of krypton working medium hall thruster discharge channel of the present invention
It sets, including light pipe, optical fiber and spectrometer；
The side wall of hall thruster discharge channel is provided with axial test seam, and the axial test seam of light pipe insertion is guide-lighting effective
In the light in discharge channel is directed into optical fiber, optical fiber connects spectrometer.
Preferably, light pipe is realized using hollow ceramic pipe.
It preferably, further include connection card, stepper motor and lead screw；
Light pipe is fixed on lead screw by connector, and stepper motor is by driving lead screw linear movement, to realize drive
Light pipe is moved forward and backward.
Preferably, the width of axial test seam is 3mm-10mm.
The on-line monitoring side of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel of the present invention
Method, comprising the following steps:
Light in discharge channel is directed by optical fiber using light pipe, optical fiber connects spectrometer, using spectrometer measurement
The krypton atomic spectral line intensity of 805.95nm, 785.48nm, 760.15nm and 758.74nm；According to the krypton atom of above-mentioned four kinds of wavelength
The temperature and krypton atomic density of the intensity of spectral line calculating electronics.
Preferably, according to the temperature of the krypton atomic spectral line Strength co-mputation electronics of four kinds of wavelength and krypton atomic density
Method particularly includes:
Calculate the first intensity ratio R1With the second intensity ratio R2；
Wherein, I1For the krypton atomic spectral line intensity of 805.95nm, I2For the krypton atomic spectral line intensity of 785.48nm, I3For
The krypton atomic spectral line intensity of 760.15nm, I4For the krypton atomic spectral line intensity of 758.74nm；
The temperature Te of electronics are as follows:
Te=-1/x1eV；
Krypton atomic density nKryptonAre as follows:
nKrypton=exp (x2)×1013cm-3；
Wherein,
Y1=lnR1；
Y2=ln (1.0117R2-0.0218)。
Spectroscopy diagnostic method belongs to contactless measurement, there is unique advantage, The method avoids equity from
The interference in daughter flow field, while will not influence the ionization process in hall thruster channel, measurement electronics that can be accurate and visual
And atomic parameter, measurement it is more accurate.The present invention is based on spectroscopy diagnostic methods, pass through analysis plasma emission spectroscopy variation
Feature extrapolates the temperature of electronics and atomic density parameter in plasma.
The beneficial effects of the invention are as follows avoid probe measurement and plasma it is direct contact caused by discharge physics mistake
The change of journey, so as to cause measurement data and actual working state deviation.It can be intuitively accurately anti-using spectral measurement
The actual discharge physical process in hall thruster discharge channel is answered, it is accurate to measure electronics and atomic parameter, and may be implemented
Real-time monitoring engine behavior.
Detailed description of the invention
Fig. 1 is electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel described in specific embodiment one
On-Line Monitor Device structural schematic diagram；
Fig. 2 is the structural schematic diagram of the axial moving device in specific embodiment three.
Specific embodiment
Specific embodiment 1: illustrate present embodiment in conjunction with Fig. 1, a kind of krypton working medium described in present embodiment is suddenly
The on-Line Monitor Device of electronics and atomic parameter in your thruster discharge channel, including light pipe 100, optical fiber 200 and spectrometer
300；
The side wall of hall thruster discharge channel is provided with axial test seam, and axial direction test seam is axial by leading to along discharge channel
Road one end extends to the other end, and light pipe 100 is inserted into axial test seam, and light pipe 100 is used to import the light in discharge channel
To optical fiber 200, optical fiber 200 connects spectrometer 300.
701 be discharge channel in Fig. 1, and L is the length of discharge channel, and 702 be cushion chamber, and 703 be anode, and 704 be insulation
The material of wall surface, the wall surface that insulate is ceramics, and 705 be outer magnetic pole, and 706 be internal magnetic pole, and dotted line is central axes in figure.
L is 20mm in present embodiment.Light pipe 100 is equipped with plane mirror close to one end of optical fiber 200, using plane
Light is reflexed to optical fiber 200 by reflecting mirror, and the change of optical path direction is realized by plane mirror.Pass through light pipe 100 and optical fiber
The light of plasma emission is introduced into spectrometer, spectroscopic data is handled, by physical equation calculate electron temperature and
Atomic density.
Specific embodiment 2: present embodiment is to a kind of krypton working medium hall thruster described in specific embodiment one
The on-Line Monitor Device of electronics and atomic parameter is described further in discharge channel, and in present embodiment, light pipe 100 is used
Hollow ceramic pipe is realized.
The light of discharge channel is exported from hollow ceramic pipe, is introduced into optical fiber 200.Hollow ceramic pipe can not only be guide-lighting and exhausted
Edge.
Specific embodiment 3: illustrating present embodiment in conjunction with Fig. 2, present embodiment is to specific embodiment two
The on-Line Monitor Device of electronics and atomic parameter is described further in a kind of krypton working medium hall thruster discharge channel,
It further include connection card 400, stepper motor 500 and lead screw 600 in present embodiment；
Light pipe 100 is fixed on lead screw 600 by connector 400, and stepper motor 500 is by driving lead screw 600 linearly to transport
It is dynamic, drive light pipe 100 to be moved forward and backward to realize.
Connection card 400, stepper motor 500 and lead screw 600 constitute axial moving device.
Axial test seam is axially arranged with along discharge channel, and light pipe 100 is inserted into axial test seam, and lead screw passes through progress electricity
Machine, stepper motor positive and negative rotation realize that light pipe 100 is moved forward and backward automatically in axially test seam, and moving distance accurately controls,
Convenient for measurement.The krypton atomic spectral line intensity that four wavelength are measured at each position, realizes the electronics and atomic parameter of the position
Measurement.Light pipe 100 is moved at discharge channel different location, realizes the acquisition to the light in entire discharge channel, thus
Realize the measurement of the electronics and atomic parameter of different location.
Specific embodiment 4: present embodiment is to a kind of krypton working medium hall thruster described in specific embodiment three
The on-Line Monitor Device of electronics and atomic parameter is described further in discharge channel, in present embodiment, axial test seam
Width is 3mm-10mm.
When the width of axial test seam is 3mm-10mm, derived light is sufficient for measurement demand.
Specific embodiment 5: being discharged based on a kind of krypton working medium hall thruster described in above-mentioned any one embodiment
The monitoring method of the on-Line Monitor Device of electronics and atomic parameter in channel, passes through the light intensity of spectrometer measurement specific wavelength: I1
Indicate 805.95nm krypton atomic spectral line intensity, I2Indicate 785.48nm krypton atomic spectral line intensity, I3Indicate 760.15nm krypton atomic spectra
Line intensity, I4Indicate 758.74nm krypton atomic spectral line intensity.
It is calculated by the following formula and obtains electron temperature and atomic density:
Y1=lnR1 (3)
Y2=ln (1.0117R2-0.0218) (4)
Electron temperature Te can be calculated are as follows:
Te=-1/x1eV (7)
Krypton atomic density nKryptonIt can calculate are as follows:
nKrypton=exp (x2)×1013cm-3 (8)
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
Although describing the present invention herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that can be carried out to exemplary embodiment
Many modifications, and can be designed that other arrangements, without departing from spirit of the invention as defined in the appended claims
And range.It should be understood that different appurtenances can be combined by being different from mode described in original claim
Benefit requires and feature described herein.It will also be appreciated that the feature in conjunction with described in separate embodiments can be used
In other described embodiments.
Claims (4)
1. the on-line monitoring method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel, including following step
It is rapid:
The light in discharge channel is directed into optical fiber (200) using light pipe (100), optical fiber (200) connects spectrometer (300),
Using the krypton atomic spectral line intensity of spectrometer (300) measurement 805.95nm, 785.48nm, 760.15nm and 758.74nm；According to
The temperature and krypton atomic density of the krypton atomic spectral line Strength co-mputation electronics of above-mentioned four kinds of wavelength:
This method realized based on the on-Line Monitor Device of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel,
The device includes light pipe (100), optical fiber (200) and spectrometer (300)；
The side wall of hall thruster discharge channel is provided with axial test seam, the axial test seam of light pipe (100) insertion, light pipe
(100) for the light in discharge channel to be directed into optical fiber (200), optical fiber (200) connects spectrometer (300)；
It is characterized in that, according to the tool of the temperature of the krypton atomic spectral line Strength co-mputation electronics of four kinds of wavelength and krypton atomic density
Body method are as follows:
Calculate the first intensity ratio R1With the second intensity ratio R2；
Wherein, I1For the krypton atomic spectral line intensity of 805.95nm, I2For the krypton atomic spectral line intensity of 785.48nm, I3For
The krypton atomic spectral line intensity of 760.15nm, I4For the krypton atomic spectral line intensity of 758.74nm；
The temperature Te of electronics are as follows:
Te=-1/x1eV；
Krypton atomic density nKryptonAre as follows:
nKrypton=exp (x2)×1013cm-3；
Wherein,
Y1=lnR1；
Y2=ln (1.0117R2-0.0218)。
2. the online prison of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel according to claim 1
Survey method, which is characterized in that the light pipe (100) is realized using hollow ceramic pipe.
3. in a kind of krypton working medium hall thruster discharge channel according to claim 1 or 2 electronics and atomic parameter
A kind of line monitoring method, which is characterized in that the on-line monitoring of electronics and atomic parameter in krypton working medium hall thruster discharge channel
Device further includes connection card (400), stepper motor (500) and lead screw (600)；
Light pipe (100) is fixed on lead screw (600) by connector (400), and stepper motor (500) is by driving lead screw (600)
Linear movement drives light pipe (100) to be moved forward and backward to realize.
4. in a kind of krypton working medium hall thruster discharge channel according to claim 1 or 2 electronics and atomic parameter
Line monitoring method, which is characterized in that the width of the axial test seam is 3mm-10mm.
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| CN201710423845.5A CN107228829B (en) | 2017-06-07 | 2017-06-07 | The on-Line Monitor Device and method of electronics and atomic parameter in a kind of krypton working medium hall thruster discharge channel |
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| CN111638241A (en) * | 2019-03-01 | 2020-09-08 | 哈尔滨工业大学 | Method for measuring wall surface thermal deposition power of Hall thruster |
| CN111044822B (en) * | 2019-12-25 | 2021-11-19 | 兰州空间技术物理研究所 | Simulation method for discharging process of discharge chamber of Kaufman ion thruster |
| CN111537068B (en) * | 2020-05-29 | 2024-03-01 | 福建吉艾普光影科技有限公司 | Portable spectrum detection equipment for lamp panel |
| CN117420083B (en) * | 2023-12-19 | 2024-04-09 | 哈尔滨工业大学 | Online monitoring device and method for trace products of plasma erosion |
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