CN104236426A - Grid interval measurement method and measurement tool for ion thruster grid electrode assembly - Google Patents
Grid interval measurement method and measurement tool for ion thruster grid electrode assembly Download PDFInfo
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- CN104236426A CN104236426A CN201410449605.9A CN201410449605A CN104236426A CN 104236426 A CN104236426 A CN 104236426A CN 201410449605 A CN201410449605 A CN 201410449605A CN 104236426 A CN104236426 A CN 104236426A
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Abstract
The invention discloses a grid interval measurement tool for an ion thruster grid electrode assembly. The measurement tool is composed of a stepped shaft type plug gauge with different detection segment lengths, wherein the stepped shaft type plug gauge is made of conductive metal material, the stepped shaft type plug gauge is divided into a handle segment and detection segments by the steps in the stepped shaft type plug gauge, the diameter of each detection segment is larger than the hole diameter of an accelerating grid electrode and smaller than the hole diameter of a screen grid electrode, and the diameter of the handle segment is larger than the hole diameter of the screen grid electrode. The invention further provides a measurement method. The special plug gauge is inserted in a screen grid electrode hole, and the grid electrode interval of the detected grid electrode assembly is judged according to whether the front end face of the special plug gauge makes contact with the accelerating grid electrode or not; in the detecting process, a multimeter is adopted for detecting whether the screen grid electrode and the accelerating grid electrode are electrically connected or not so that whether the front end of the special plug gauge makes contact with the accelerating grid electrode or not can be judged. The grid interval measurement method and the measurement tool for the ion thruster grid electrode assembly effectively solve the technical problem about detection of the interval between grid electrodes in the spherical surface area of the grid electrode assembly on the basis of the characteristic of the ion thruster grid electrode assembly.
Description
Technical field
The present invention relates to peculiar part erecting shop apart from the method detected, particularly relate to a kind of measuring method for ion thruster grid assembly spherical area grid spacing and measure tool.
Background technology
Ion thruster is the thruster of advanced space device application, compared with traditional chemical thruster, has high specific impulse and long-life feature, the position being mainly used in telstar keeps and Orbit Transformation, survey of deep space spacecraft promote mainly into etc. task.After spacecraft application ion thruster, can significantly reduce propellant carrying amount, increase useful load, significant economic benefit can be brought, can significantly promote spacecraft comprehensive technical level simultaneously.Grid assembly is the core component of ion thruster product, and its function is drawn and accelerates arc chamber ion and produce thrust, is the core component directly determining ion thruster performance, life-span and reliability.
Grid assembly is primarily of screen-grid, accelerating grid electrode and other structural member composition, and two grids are thin spherical shell class part, gate hole enormous amount, and the spacing between two grids is key parameter, must carry out detection and control during assembling.
The grid spacing that existing detection technique only can realize gate edge region detects (gate edge is plane), for the detection of grid assembly spherical area grid spacing, existing detection technique cannot realize, reason is the singularity of grid assembly structure, and standard detection measurer and instrument cannot realize the detection of grid spacing.
Summary of the invention
In view of this, the invention provides a kind of method of ion thruster grid assembly spherical area grid distance measurement, the method is for the design feature of grid assembly, special feeler gauge is adopted to detect grid spacing, testing process is simple to operation, and the grid spacing that can realize any position of many specifications grid assembly spherical area detects.
Technical solution of the present invention is:
For a grid distance measurement tool for ion thruster grid assembly, described grid assembly comprises screen-grid and accelerating grid electrode, and this measurement tool is made up of the step shaft type feeler gauge that one group of detection segment length is different; Described step shaft type feeler gauge adopts conductive metallic material to make, and step shaft type feeler gauge is divided into handle section and detection segment by the step in described step shaft type feeler gauge, and detection segment diameter is greater than accelerating grid electrode aperture, and is less than screen-grid aperture; Handle section diameter is greater than screen-grid aperture.
Preferably, handle section diameter 0.5mm ~ 0.8mm larger than screen-grid aperture.
Preferably, a detection segment length range of organizing a performance rank shaft type feeler gauge is 0.80mm ~ 2.00mm, every 0.01mm specification.
Present invention also offers a kind of grid measurement method for distance for ion thruster grid assembly, adopt above-mentioned any one to measure tool and realize, the method comprises: insert in screen-grid hole by the step shaft type feeler gauge of each specification successively; Often insert a step shaft type feeler gauge, whether touch by the front end face of step shaft type feeler gauge the grid spacing that accelerating grid electrode determines tested grid assembly.
Grid spacing one determines that scheme is: for the step shaft type feeler gauge touching accelerating grid electrode, and the length of this step shaft type feeler gauge detection segment is deducted screen-grid thickness t, is detected, obtain the measurement result at check point place by the step shaft type feeler gauge of multiple length.
Another kind of more excellent grid spacing determination scheme is: according to detection segment from being short to long order, inserts in screen-grid hole successively by the step shaft type feeler gauge of each specification; The detection segment length of the step shaft type feeler gauge touching accelerating grid electrode is first deducted screen-grid thickness t, is the grid spacing at check point place.
Wherein, adopt multimeter detection screen-grid whether to conduct with accelerating grid electrode the front end judging special feeler gauge and whether contact accelerating grid electrode.
Multimeter is set to the buzzing shelves of resistance detection, if the front end face of step shaft type feeler gauge touches accelerating grid electrode, then two grids are by the short circuit of step shaft type feeler gauge, multimeter buzzing.
The present invention's beneficial effect is compared with prior art:
(1) structure that the present invention is directed to ion thruster grid assembly is special, provide a kind of measurement tool being applicable to spherical area gate pitch, efficiently solve the detection technique problem of grid assembly spherical area gate pitch, and it is simple to measure lamps structure, it is convenient to measure.
(2) according to grid pore size, handle section diameter 0.5mm ~ 0.8mm larger than screen-grid aperture is set, the design of this size makes handle section not probe between grid, and can not cause having larger measuring error during the grid distance measurement being applied to cambered surface grid because area is excessive.
(3) the gate pitch detection method that this invention provides has flexible, economic and practical feature easy to use, and accuracy of detection arrives 0.01mm, and the spacing that can be applicable to seriation ion thruster grid assembly and other similar products detects.
(4) for each check point, according to detection segment from being short to long order, successively the step shaft type feeler gauge of each specification is inserted in screen-grid hole, the detection segment length touching the step shaft type feeler gauge of accelerating grid electrode so first deducts screen-grid thickness t, is the grid spacing at check point place.This mode can obtain grid distance measurement result with minimum number of attempt, improves detection efficiency.
(5) multimeter auxiliary judgment of the present invention, cost is low, and effectively can judge whether feeler gauge front end face touches accelerating grid electrode, solves the technical barrier of the detection of grid assembly spherical area grid spacing.
Accompanying drawing explanation
Fig. 1 be ion thruster grid assembly of the present invention grid between distance detecting method schematic diagram;
Fig. 2 is the geometric relationship figure of feeler gauge and grid when detecting gate pitch;
Step shaft type feeler gauge 1, screen-grid 2, accelerating grid electrode 3, δ represent gate pitch, and L represents feeler gauge detection segment length, and t represents screen-grid thickness.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
Measurement target of the present invention is the grid spacing of ion thruster grid assembly, and as shown in Figure 1, grid assembly comprises screen-grid 2 and accelerating grid electrode 3, and has certain radian in the middle of it.Screen-grid 2 and accelerating grid electrode 3 are reticulate texture, and the aperture of screen-grid 2 is greater than the aperture of accelerating grid electrode 3.
Based on above-mentioned analysis, the invention provides a kind of grid distance measurement tool for ion thruster grid assembly, it is made up of the step shaft type feeler gauge 1 that one group of detection segment length is different.A step shaft type feeler gauge is merely illustrated in Fig. 1.Step shaft type feeler gauge adopts conductive metallic material to make, step shaft type feeler gauge is divided into handle section and detection segment by step wherein, and detection segment diameter is greater than accelerating grid electrode aperture, and is less than screen-grid aperture, detection segment can be probeed between grid, but can not accelerating grid electrode be passed.Handle section diameter is greater than screen-grid aperture, and handle section can not be probeed between grid.Handle section is convenient to hand-held, and handle section can be multi-section structure.
According to grid pore size, arrange handle section diameter 0.5mm ~ 0.8mm larger than screen-grid aperture, the design of this size makes handle section not probe between grid, and can not cause having larger measuring error during the grid distance measurement being applied to cambered surface grid because area is excessive.
In the present embodiment, according to the possible range of grid spacing, a detection segment length range of organizing a performance rank shaft type feeler gauge is 0.80mm ~ 2.00mm, every 0.01mm specification, thus makes measuring accuracy reach 0.01mm.
When adopting this measurement tool to carry out grid distance measurement, the test pencil of multimeter contacts the constitutional detail conducted with screen-grid, accelerating grid electrode respectively; Successively the step shaft type feeler gauge of each specification is inserted in screen-grid hole; Often insert a step shaft type feeler gauge, adopt multimeter detection screen-grid whether to conduct with accelerating grid electrode the front end judging special feeler gauge and whether contact accelerating grid electrode; The grid spacing that accelerating grid electrode judges tested grid assembly whether is touched by the front end face of step shaft type feeler gauge.
Below in conjunction with Fig. 1, measuring process of the present invention is described in detail.
(1) the screen-grid side of grid assembly is placed on upward on supporting tooling (6 in Fig. 1), on the detection tooling platform (7 in Fig. 1) that carrying cylinder is placed, as shown in Figure 1.
(2) multimeter test pencil (4 in Fig. 1) being contacted with screen-grid back up pad, is electric conducting state between screen-grid back up pad and screen-grid; Another test pencil (5 in Fig. 1) of multimeter is installed supporting screw with accelerating grid and is contacted, and is electric conducting state between this screw and accelerating grid electrode.Multimeter is set to the buzzing shelves of resistance detection.
(3) the special feeler gauge detection segment length dimension scope adopted in test is 1.20mm ~ 1.60mm.During detection, select the some zonules sampling Detection (sampling observation region is determined by the technique of specific product) determined in the whole spherical area of grid assembly.
(4) for each check point, adopt multimeter detection screen-grid whether to conduct with accelerating grid electrode the front end judging special feeler gauge and whether contact accelerating grid electrode, whether touch accelerating grid electrode by the front end face of feeler gauge and judge grid spacing.
For certain feeler gauge of concrete length, when detecting the spacing at a gate hole place, by whether contacting, can judge that the length that grid distance values is greater than or less than this feeler gauge detection segment deducts screen-grid thickness.Fig. 2 is the geometric relationship figure of feeler gauge and grid when detecting grid spacing, and δ represents gate pitch, and L represents feeler gauge detection segment length, and t represents screen-grid thickness, if the contact of feeler gauge front end face accelerating grid electrode, then δ < L-t; If feeler gauge front end face does not contact accelerating grid electrode, then δ > L-t.Detected by the feeler gauge of multiple length, provide the measurement result at check point place.
Preferably, for each check point, according to detection segment from being short to long order, successively the step shaft type feeler gauge of each specification is inserted in screen-grid hole.If the front end face of step shaft type feeler gauge touches accelerating grid electrode, then two grids are by the short circuit of step shaft type feeler gauge, multimeter buzzing.The detection segment length of the step shaft type feeler gauge touching accelerating grid electrode is first deducted screen-grid thickness t, is the grid spacing at check point place.This mode can obtain grid distance measurement result with minimum number of attempt.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. for a grid distance measurement tool for ion thruster grid assembly, described grid assembly comprises screen-grid and accelerating grid electrode, it is characterized in that, described measurement tool is made up of the step shaft type feeler gauge (1) that one group of detection segment length is different; Described step shaft type feeler gauge (1) adopts conductive metallic material to make, step shaft type feeler gauge is divided into handle section and detection segment by the step in described step shaft type feeler gauge, detection segment diameter is greater than accelerating grid electrode (3) aperture, and is less than screen-grid (2) aperture; Handle section diameter is greater than screen-grid aperture.
2. measure tool as claimed in claim 1, it is characterized in that, handle section diameter 0.5mm ~ 0.8mm larger than screen-grid aperture.
3. measure tool as claimed in claim 1, it is characterized in that, a detection segment length range of organizing a performance rank shaft type feeler gauge is 0.80mm ~ 2.00mm, every 0.01mm specification.
4. for a grid measurement method for distance for ion thruster grid assembly, it is characterized in that, adopt the measurement tool as described in claim 1 or 2 or 3 to realize, the method comprises the steps:
Successively the step shaft type feeler gauge of each specification is inserted in screen-grid hole; Often insert a step shaft type feeler gauge, whether touch by the front end face of step shaft type feeler gauge the grid spacing that accelerating grid electrode determines tested grid assembly.
5. method according to claim 4, it is characterized in that: for the step shaft type feeler gauge touching accelerating grid electrode, the length of this step shaft type feeler gauge detection segment is deducted screen-grid thickness t, is detected by the step shaft type feeler gauge of multiple length, obtain the measurement result at check point place.
6. method according to claim 4, is characterized in that: according to detection segment from being short to long order, inserts in screen-grid hole successively by the step shaft type feeler gauge of each specification; The detection segment length of the step shaft type feeler gauge touching accelerating grid electrode is first deducted screen-grid thickness t, is the grid spacing at check point place.
7. method according to claim 4, is characterized in that: adopt multimeter detection screen-grid whether to conduct with accelerating grid electrode the front end judging special feeler gauge and whether contact accelerating grid electrode.
8. method according to claim 7, is characterized in that: multimeter is set to the buzzing shelves of resistance detection, if the front end face of step shaft type feeler gauge touches accelerating grid electrode, then two grids are by the short circuit of step shaft type feeler gauge, multimeter buzzing.
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| CN201410449605.9A CN104236426B (en) | 2014-09-04 | 2014-09-04 | A kind of grid measurement method for distance for ion thruster grid assembly and measurement have |
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Cited By (7)
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| CN105021405A (en) * | 2015-07-16 | 2015-11-04 | 兰州空间技术物理研究所 | Beam target for ion thruster ground test |
| CN105097407A (en) * | 2015-07-13 | 2015-11-25 | 兰州空间技术物理研究所 | Small-caliber and variable-aperture grid assembly |
| CN110673195A (en) * | 2019-08-26 | 2020-01-10 | 北京控制工程研究所 | Device and method for measuring transient ion flow field of plasma thruster |
| CN113279930A (en) * | 2021-06-30 | 2021-08-20 | 哈尔滨工业大学 | Grid component assembly structure and assembly method of micro ion thruster |
| CN113375579A (en) * | 2021-06-25 | 2021-09-10 | 上海工程技术大学 | Method and platform for detecting grid surface spacing of grid assembly |
| CN114934883A (en) * | 2022-05-25 | 2022-08-23 | 兰州空间技术物理研究所 | Curved surface grid assembly of ion thruster |
| WO2024119781A1 (en) * | 2022-12-06 | 2024-06-13 | 江苏鲁汶仪器股份有限公司 | Ion beam device, ion source apparatus and grid structure thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105097407A (en) * | 2015-07-13 | 2015-11-25 | 兰州空间技术物理研究所 | Small-caliber and variable-aperture grid assembly |
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| CN110673195A (en) * | 2019-08-26 | 2020-01-10 | 北京控制工程研究所 | Device and method for measuring transient ion flow field of plasma thruster |
| CN113375579A (en) * | 2021-06-25 | 2021-09-10 | 上海工程技术大学 | Method and platform for detecting grid surface spacing of grid assembly |
| CN113375579B (en) * | 2021-06-25 | 2022-08-23 | 上海工程技术大学 | Method and platform for detecting grid surface spacing of grid assembly |
| CN113279930A (en) * | 2021-06-30 | 2021-08-20 | 哈尔滨工业大学 | Grid component assembly structure and assembly method of micro ion thruster |
| CN114934883A (en) * | 2022-05-25 | 2022-08-23 | 兰州空间技术物理研究所 | Curved surface grid assembly of ion thruster |
| WO2024119781A1 (en) * | 2022-12-06 | 2024-06-13 | 江苏鲁汶仪器股份有限公司 | Ion beam device, ion source apparatus and grid structure thereof |
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Inventor after: Li Detian Inventor after: Tang Fujun Inventor after: Zhang Tianping Inventor after: Zhang Weiwen Inventor after: Zhou Zhicheng Inventor after: Zheng Maofan Inventor after: Huang Yongjie Inventor after: Sun Yunkui Inventor after: Jia Yanhui Inventor before: Tang Fujun Inventor before: Zhou Zhicheng Inventor before: Zhang Tianping Inventor before: Zheng Maofan Inventor before: Huang Yongjie Inventor before: Sun Yunkui Inventor before: Jia Yanhui |
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