CN203465047U - C-type tube torsional pendulum measuring system based on PSD - Google Patents
C-type tube torsional pendulum measuring system based on PSD Download PDFInfo
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- CN203465047U CN203465047U CN201320547582.6U CN201320547582U CN203465047U CN 203465047 U CN203465047 U CN 203465047U CN 201320547582 U CN201320547582 U CN 201320547582U CN 203465047 U CN203465047 U CN 203465047U
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Abstract
The utility model relates to a C-type tube torsional pendulum measuring system based on high sensitivity photoelectric position sensor PSD (Position Sensitive Detector). The C-type tube torsional pendulum measuring system comprises a C-type tube (1), a laser reflector (2), a cross beam (3), a laser device (4), a plane reflective mirror I (5), the PSD (6) and a plane reflective mirror II (7), wherein two ends of the C-type tube (1) are fixed on a torsional pendulum framework, the C-type tube (1) stays in a vertical state, the C-type tube (1) vertically penetrates through a center hole of the cross beam (3) and is fixed on the cross beam (3), the cross beam (3) is arranged at a central position of the C-type tube (1) and stays in a horizontal state, the laser reflector (2) is arranged in the C-type tube (1) and is closely adjacent to the cross beam (3), and a mirror face of the laser reflector (2) faces towards an opening direction of the C-type tube (1). The C-type tube torsional pendulum measuring system is advantaged in that the C-type tube torsional pendulum measuring system has properties of strong anti-electromagnetic interference capability, high resolution, small measuring error and strong bearing capability, retains characteristics of high resolution of a Castano torsional pendulum, and further has properties of convenient mounting and non-high development cost.
Description
Technical field
The utility model relates to a kind of C type pipe based on high sensitivity photoelectrical position sensor PSD (Position Sensitive Detector) and rocks measuring system.
Background technology
The thrust measurement of electricity propelling or the micro-propelling of laser is comprised to average thrust is measured and impulse is measured.Microthrust is measured and mainly based on microthrust, to be measured stand and carry out, thereby its essence is by observing the mechanical response of thrust measurement stand under microthrust effect and indirectly measure thrust or momentum.Different according to thrust range, measuring method is also different.Thrust for tens of mN to N level, adopts Weighing type scale rack mostly, or gravity pendulum structure; For μ N magnitude thrust, need to adopt and rock.
2003 Nian， U.S. M. Gamero-Casta o have developed a torsional pendulum type microthrust measuring system that sensitivity is very high under the subsidy of NASA, jet propulsion laboratory and Air Force Research Laboratory.This system can support the thruster of 44kg, and the resolution that microthrust is measured is up to 0.03 μ N
[1].This crossbeam rocking is supported by two flexible pivots, and crosshead displacement is surveyed by an optical fibre displacement sensor (fiber optic displacement sensor, LDS).LDS is that resolution in 100 hertz time is 5.0nm at frequency acquisition, so this thrust measurement resolution of rocking is very high.
For the performance of the micro-propelling of Study of Laser, the people such as the C. R. Phipps of Optical Society of America have developed high the rocking of a kind of sensitivity.This resolution of rocking is 25nN, can support the thruster of 15kg.Rocking the maximum thrust that can survey is 500 μ N, and precision is 0.5%, and minimum thrust is 100nN, and precision is 25%.This high resolving power of rocking mainly has benefited from torsion wire and the optical lever that radius is very little.
The people such as the H. Koizumi of Aero-Space institute of Tokyo Univ Japan have also developed with Casta o and have similarly rocked.The I of its impulse measurement reaches 1 μ Ns, and precision is 0.7 μ Ns.
At home, the rocked measuring method row theoretical analysis of the commander Venus professor of institute to single laser pulse momentum
[4].Doctor Li Jing of Chinese University of Science and Technology has also developed and has been similar to rocking of C. R. Phipps for laser ablation thrust measurement.The momentum test specification that it rocks is 10
-7ns ~ 10
-4ns, distinguishable minimum momentum approximately 10
-7ns.
The advantage of rocking is highly sensitive.The gravity of thruster is by rocking the axial tension of torsion wire or the anchorage force of bar axle is born, the windup-degree of torsion wire reaction thrust size, thereby, even for its thrust of thruster of tens of kilograms be μ N magnitude also available rocking measure.For rocking of torsion wire class, its maximum shortcoming is to be difficult to thruster, counterweight and crossbeam three's center of gravity to be strictly positioned on the axis at torsion wire place.Even by crossbeam trim, center of gravity is positioned on torsion wire before measuring, in measuring process, due to the effect of crossbeam rotation and thrust, center of gravity is easy to depart from torsion wire.Deviation of gravity center torsion wire will cause the amplitude of crossbeam angular displacement and the variation in cycle, thereby produces larger measuring error.What M. Gamero-Casta o developed rocks because the diameter of flexible pivot is larger, and thruster, counterweight and crossbeam three center of gravity can limit on flexible pivot, the problem that does not exist similar torsion wire to rock.This rocking can accomplish that precision is very high, but this technological requirement of rocking processing, assembling is high, and development cost is expensive.
Summary of the invention
The utility model, for the existing poor shortcoming of Electro Magnetic Compatibility of rocking, has proposed a kind of anti-electromagnetic interference capability strong, and resolution is high, and measuring error is little, and the C type pipe based on PSD that load-bearing capacity is strong rocks measuring system.
The described C type pipe based on PSD rocks measuring system and comprises: C type pipe 1, laser mirror 2, and crossbeam 3, laser instrument 4, plane mirror I 5, PSD 6, plane mirror II 7.
Wherein, C type pipe 1 two ends are fixed on and are rocked on framework, and C type pipe 1 keeps vertical state.The vertical center pit through crossbeam 3 of C type pipe 1, and be fixed on crossbeam.Crossbeam 3 is positioned at the centre position of C type pipe 1, keeps horizontality.Laser mirror 2 is positioned at C type pipe 1 inside, next-door neighbour's crossbeam 3.The minute surface of laser mirror 2 is towards C type pipe 1 opening direction.The central axis of C type pipe is through the minute surface of laser mirror 2.
The minute surface of plane mirror I 5 and plane mirror II 7 is parallel to each other and is all parallel with the axis of C type pipe 1.Plane mirror I 5 and plane mirror II 7 lay respectively at the minute surface both sides of laser mirror 2.Laser instrument 4 is fixed on and rocks on framework, and its laser sending incides the center of laser mirror 2.Laser through laser mirror 2 reflections is injected PSD 6 again after the several reflection of plane mirror I 5 and plane mirror II 7.PSD 6 is also fixed on and rocks on framework.Laser spot position is measured by PSD6, according to the variation of facula position, can calculate the displacement of rocking crossbeam.
Described C type pipe is " C " type cross-sectional openings thin-walled round bar.
Reserved microthruster interface on described crossbeam.
This rocks measuring system and has inherited Casta o and rock high-resolution feature, and easy for installation, and development cost is not high.
Accompanying drawing explanation
Fig. 1 is Fig. 1 crossbeam and C type tubular construction schematic diagram,
Fig. 2 is that optical lever and crosshead displacement are measured assembling schematic diagram.
Embodiment
A kind of C type pipe based on PSD rocks measuring system and comprises: C type pipe 1, laser mirror 2, and crossbeam 3, laser instrument 4, plane mirror I 5, PSD 6, plane mirror II 7.
Wherein, C type pipe 1 keeps vertical state.C type pipe 1 two ends are fixed on and are rocked on framework, and C type pipe 1 vertically passes and be fixed on the center pit of crossbeam 3.Crossbeam 3 is positioned at the centre position of C type pipe 1, keeps horizontality.Laser mirror 2 is positioned at C type pipe 1 inside, next-door neighbour's crossbeam 3.The minute surface of laser mirror 2 is towards C type pipe 1 opening direction.The central axis of C type pipe is through the minute surface of laser mirror 2.
The minute surface of plane mirror I 5 and plane mirror II 7 is parallel to each other and is all parallel with the axis of C type pipe 1.Plane mirror I 5 and plane mirror II 7 lay respectively at the minute surface both sides of laser mirror 2.Laser instrument 4 is fixed on and rocks on framework, and its laser sending incides the center of laser mirror 2.Laser through laser mirror 2 reflections is injected PSD 6 again after the several reflection of plane mirror I 5 and plane mirror II 7.PSD 6 is also fixed on and rocks on framework.Laser spot position is measured by PSD6, according to the variation of facula position, can calculate the displacement of rocking crossbeam.
Described C type pipe is " C " type cross-sectional openings thin-walled round bar.The machinery of C type pipe and design of material can references openings thin-wall circular torsion of bar theories.
Microthruster and counter weight device are installed respectively in two ends at crossbeam.While testing, require crossbeam in horizontality, for leveling, the relative position of adjustable weight on crossbeam.The weight of crossbeam itself is not have influentially, but very large on the impact of moment of inertia and rotation period for the moment of torsion rocking, and considers that crossbeam overhangs on torsion bar, therefore should reduce as much as possible its quality.
This measuring system has been reserved microthruster interface on crossbeam, easily the multiple microthruster such as carry PPT.In addition, reserved high voltage direct current source interface, adopts good high pressure quarantine measures, guarantees the physical electrical isolation between experimental stand and high-voltage power supply; On torsion bar, be set with spiral conducting line, draw high voltage direct current, solved the impact of microthruster electric power system on thrust measurement.
Claims (3)
1. the C type pipe based on PSD rocks measuring system, comprise: C type pipe (1), laser mirror (2), crossbeam (3), laser instrument (4), plane mirror I (5), PSD(6), plane mirror II (7), is characterized in that, C type pipe (1) two ends are fixed on and are rocked on framework, C type pipe keeps vertical state, and C type pipe vertically passes the center pit of crossbeam (3), and is fixed on crossbeam; Crossbeam (3) is positioned at the centre position of C type pipe, keeps horizontality; It is inner that laser mirror (2) is positioned at C type pipe, next-door neighbour's crossbeam (3), and the minute surface of laser mirror (2) is towards C type tube opening direction, and the central axis of C type pipe is through the minute surface of laser mirror 2;
The minute surface of plane mirror I (5) and plane mirror II (7) is parallel to each other and is all parallel with the axis of C type pipe (1), plane mirror I (5) and plane mirror II (7) lay respectively at the minute surface both sides of laser mirror (2), laser instrument (4) is fixed on and rocks on framework, PSD(6) is also fixed on and rocks on framework.
2. a kind of C type pipe based on PSD according to claim 1 rocks measuring system, it is characterized in that, described C type pipe is C type cross-sectional openings thin-walled round bar.
3. a kind of C type pipe based on PSD according to claim 1 rocks measuring system, it is characterized in that reserved microthruster interface on described crossbeam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320547582.6U CN203465047U (en) | 2013-09-05 | 2013-09-05 | C-type tube torsional pendulum measuring system based on PSD |
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|---|---|---|---|
| CN201320547582.6U CN203465047U (en) | 2013-09-05 | 2013-09-05 | C-type tube torsional pendulum measuring system based on PSD |
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| CN203465047U true CN203465047U (en) | 2014-03-05 |
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|---|---|---|---|
| CN201320547582.6U Expired - Fee Related CN203465047U (en) | 2013-09-05 | 2013-09-05 | C-type tube torsional pendulum measuring system based on PSD |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954267A (en) * | 2019-12-06 | 2020-04-03 | 武汉轻工大学 | Three-wire pendulum rotation period measuring circuit and device |
| CN114964588A (en) * | 2022-05-20 | 2022-08-30 | 中国人民解放军国防科技大学 | Torsional pendulum type micro-thrust measuring device and method |
-
2013
- 2013-09-05 CN CN201320547582.6U patent/CN203465047U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954267A (en) * | 2019-12-06 | 2020-04-03 | 武汉轻工大学 | Three-wire pendulum rotation period measuring circuit and device |
| CN114964588A (en) * | 2022-05-20 | 2022-08-30 | 中国人民解放军国防科技大学 | Torsional pendulum type micro-thrust measuring device and method |
| CN114964588B (en) * | 2022-05-20 | 2024-08-27 | 中国人民解放军国防科技大学 | Torsional pendulum type micro-thrust measuring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170727 Address after: 518107 01C-1 building, B5 building, Guangming Science Park, 3009 Guangming Road, Guangming Street, Guangming District, Guangming District, Guangdong, Shenzhen Patentee after: SHENZHEN XUNTIAN SPACE TECHNOLOGY CO.,LTD. Address before: Zheng Jie in Hunan province 410073 Changsha City Yan w pool No. 47 Patentee before: NATIONAL University OF DEFENSE TECHNOLOGY |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhongke Tianzhi operation control (Shenzhen) Technology Co.,Ltd. Assignor: SHENZHEN XUNTIAN SPACE TECHNOLOGY Co.,Ltd. Contract record no.: X2021980001486 Denomination of utility model: A c-tube torsion pendulum measurement system based on PSD Granted publication date: 20140305 License type: Common License Record date: 20210305 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Hongxing Technology Co.,Ltd. Assignor: SHENZHEN XUNTIAN SPACE TECHNOLOGY Co.,Ltd. Contract record no.: X2021980001777 Denomination of utility model: A c-tube torsion pendulum measurement system based on PSD Granted publication date: 20140305 License type: Common License Record date: 20210318 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220624 Address after: Room 1012, 10 / F, building 2, haipingyuan, 229 Guyuan Road, high tech Development Zone, Changsha, Hunan 410000 Patentee after: Hunan Hongxing Technology Co.,Ltd. Address before: 518107 unit 01c-1, building B5, Guangming Science Park, China Merchants Group, No. 3009, sightseeing Road, Guangming Street, Guangming New District, Shenzhen, Guangdong Patentee before: SHENZHEN XUNTIAN SPACE TECHNOLOGY CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 |