CN105157896A - Variable-range thrust measuring device applicable to microminiature thruster - Google Patents
Variable-range thrust measuring device applicable to microminiature thruster Download PDFInfo
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- CN105157896A CN105157896A CN201510300303.XA CN201510300303A CN105157896A CN 105157896 A CN105157896 A CN 105157896A CN 201510300303 A CN201510300303 A CN 201510300303A CN 105157896 A CN105157896 A CN 105157896A
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Abstract
The invention discloses a variable-range thrust measuring device applicable to a microminiature thruster, which comprises a working base plate, a fixed vertical beam, a movable vertical beam, pivot sleeve assemblies, a knife edge frame, a movable cross beam, a displacement measurement device, a voice coil calibration device and a damping device, and is characterized in that the working base plate is leveled through four bolts; the fixed vertical beam is installed on the working base plate and provided with overload protection bolts; each pivot sleeve assembly is composed of four pivot sleeves and two pivots, and two ends of each pivot are installed by the pivot sleeves respectively in a locking mode. The whole measuring device is equipped with five pivot sleeve assemblies which are consistent in external mechanical interface, thereby enabling the thrust measuring ranges to be 0-100muN, 0-500muN, 0-1mN, 0-50mN and 0-100mN respectively, and achieving a purpose of high-precision thrust measurement with the range being variable. According to the invention, a displacement sensor is adopted to realize displacement measurement for the cross beam, a voice coil and a permanent magnet are adopted to realize system calibration, and a copper piece and a permanent magnet are adopted to realize passive damping for movement of the cross beam. The whole set of device can operate in a vacuum simulation environment.
Description
Technical field
The invention belongs to the field of measuring technique of power, relate to a kind of thrust-measuring device being applicable to process micro thruster.
Background technology
In today that Small Satellite Technology is flourish, the process micro thruster thrust measurement being applicable to moonlet rail control is important probing direction always.The high-acruracy survey of thrust has very important effect to angle of rake design, checking and application.But; the thrust of process micro thruster (such as cold air thruster, laser deep welding device etc.) exports less; generally below hundred milli ox magnitudes; even reach the micro-ox of hundreds of or tens micro-oxen, this proposes larger challenge to measuring micro-thrust: (1) thruster thrust-weight ratio is very little.Relative to the weight of propulsion plant and relevant device thereof, measured thrust is very little.Sometimes, the weight of propulsion plant is even more than 10kg (≈ 100N), and the power surveyed is less than 1mN.If its measuring error is 1%, then thrust measurement Error Absolute Value is only 0.01mN, is 10 with the ratio of weight
-7, very high requirement is proposed to the design of measuring system.(2) influence factor is numerous.For micro thrust, many negligible factors under normal conditions are all enough to be flooded, and the step of such as people or breathing etc. all may have an impact to measurement result, propose very high requirement to measurement environment and method.(3) measure under vacuum environment.In order to micro-thruster working environment that is virtually reality like reality, need in vacuum chamber, complete various operation and measurement, and bear the impact of high temperature and low temperature, very high requirement is proposed to the structure of data transmission and measuring method and measuring system.
In the face of the challenge of measuring micro-thrust, adopt which kind of measuring method, how to carry out structural design, how to eliminate the impact of various factors and how to implement thrust measurement, reaching the object of high precision, easy to operate, highly versatile, is the technical matters that those skilled in the art very pay close attention to.
Summary of the invention
The object of the invention is to design a kind of changeable fluid thrust-measuring device being applicable to process micro thruster, the topworks of horizontal torsion is adopted to eliminate the impact of gravity, the mode of complete machine carry is adopted to eliminate the impact of pipeline, the measurement adopting the mode of wireless remote control and remote controlled critical component design to realize in vacuum environment operates, and adopts the consistent pivot external member of external interface to realize the versatility of process micro thruster thrust measurement.
Concrete technical scheme of the present invention is: changeable fluid thrust-measuring device comprises working plate, fixing vertical beam, movable vertical beam, the combination of pivot external member, edge of a knife frame, moved cross beam, displacement measuring device, voice coil loudspeaker voice coil caliberating device and damping unit.
Moved cross beam is the crucial execution unit of whole measurement mechanism, together with tying with movable vertical beam, and without frictional rotation in surface level.Moved cross beam one end installation propeller, the supply system of other end installation propeller and telechirics, and utilize balancing weight to make crossbeam Moment balance in the vertical direction, make the gravity separation of angle of rake thrust and thruster and relevant apparatus, and eliminate the impact of pipeline on thrust measurement completely by the angle of rake mode of complete machine carry.
Moved cross beam adopts displacement sensor in the angle of horizontal rotation in surface, and the displacement transducer adopted is noncontacting measurement, is equipped with special vacuum adaptor, can uses under vacuum conditions.Caliberating device adopts voice coil loudspeaker voice coil and permanent magnet, permanent magnet is arranged on moved cross beam, voice coil loudspeaker voice coil adopts unique kayser support and permanent magnet coaxially to install, when the logical specific electric current of voice coil loudspeaker voice coil, certain electromagnetic force is produced between voice coil loudspeaker voice coil and electromagnet, this caliberating device is contactless design, can Long-distance Control, is applicable to vacuum environment and uses.Damping unit adopts magnetic damping mode, primarily of L shape copper sheet and opposite pole permanent magnet combination composition, is also applicable to vacuum environment and uses.In the whole course of work, angle of rake control adopts wireless remote control mode to realize, and displacement measurement, demarcation and damping all can Long-distance Control, and package unit can be fully operational in vacuum simulated environment.
In order to there is stronger versatility to micro-thruster, whole measurement mechanism is equipped with the consistent pivot external member combination of five cover external interfaces, make thrust measurement scope be respectively 0 ~ 100 μ N, 0 ~ 500 μ N, 0 ~ 1mN, 0 ~ 50mN and 0 ~ 100mN, reach the object that changeable fluid carries out high precision thrust measurement.Advantage of the present invention is:
1. precision is higher.Adopt the pendulum-type structure of horizontal torsion to eliminate the impact of gravity completely, adopt the mode of thruster complete machine carry to avoid thruster to be connected with outside pipeline completely, greatly improve measuring accuracy.
2. flexible structure.Crossbeam adopts square tube porous structure; be convenient to installation and the position adjustment of the devices such as thruster, voice coil loudspeaker voice coil and displacement transducer adopt translation stage as mounting base, are convenient to position adjustment and device protection; adopt the pivot external member that external interface is consistent, be convenient to the change of thrust range.
3. it is convenient to control.Thruster can remote wireless control, and critical component long-rangely can have line traffic control, and Systematical control and data transmission more for convenience, make package unit can work in real specific impulse working environment.
4. highly versatile.Adopt pivot external member to realize below 100mN five gear thrust measurements, meet different magnitude, dissimilar angle of rake continuous thrust and average pulse thrust measurement.
Accompanying drawing explanation
Fig. 1 is thrust-measuring device external structure;
Fig. 2 is fixing vertical beam structural drawing;
Fig. 3 A is pivot external member combination assumption diagram;
Fig. 3 B is pivot external member combination of side view;
Fig. 4 is edge of a knife shelf structure figure;
Fig. 5 is moved cross beam structural drawing;
Fig. 6 is displacement measuring device structural drawing;
Fig. 7 is voice coil loudspeaker voice coil caliberating device structural drawing;
Fig. 8 is damping unit structural drawing.
In figure: 1-working plate; 2-fixes vertical beam; The movable vertical beam of 3-; 4-pivot external member combines; 5-edge of a knife frame; 6-moved cross beam; 7-displacement measuring device; 8-voice coil loudspeaker voice coil caliberating device; 9-damping unit; 201,202-overload protection bolt; 401,402,403,404-pin axial sleeve; 405,406-pivot; 501-cutter holds; The 601-edge of a knife; 701-displacement transducer; 702-sensor stand; 703-manual translation platform; 801-voice coil loudspeaker voice coil; 802-voice coil suspension; 803-manual translation platform; 804-permanent magnet; 805-permanent magnet erecting frame; 901-L shape copper sheet; 902-opposite pole permanent magnet combines; 903-permanent magnetism brandreth.
Embodiment
Below in conjunction with accompanying drawing, description is described in further detail to thrust-measuring device the present invention.
Shown in Figure 1, thrust-measuring device comprises working plate (1), fixing vertical beam (2), movable vertical beam (3), the combination of pivot external member (4), edge of a knife frame (5), moved cross beam (6), displacement measuring device (7), voice coil loudspeaker voice coil caliberating device (8) and damping unit (9); Working plate (1) carries out leveling by four bolts; Fixing vertical beam (2) is arranged on working plate (1), and overload protection bolt (201,202) is housed, shown in Figure 2.
Refer to shown in Fig. 3 A, Fig. 3 B, pivot external member combination (4) is made up of four pin axial sleeves (401,402,403,404) and two pivots (405,406), the diameter of pin axial sleeve circular groove is identical with pivot diameter, each pivot two ends adopt the mode of kayser to install by a pin axial sleeve respectively, and every two pin axial sleeves (401,403 and 402,404) are arranged on movable vertical beam (3) and fixing vertical beam (2) respectively.
Shown in Figure 4, edge of a knife frame (5) is arranged on movable vertical beam (3), and installs cutter and hold (501).
Shown in Figure 5, moved cross beam (6) adopts rhs-structure, four sides has M6 threaded hole, be convenient to device install, the edge of a knife (601) is equipped with in bottom, and the edge of a knife (601) is placed in cutter and holds on (501), install thruster and supply and telechiric device after, trim is carried out to moved cross beam (6), after trim, together with movable vertical beam (3) and edge of a knife frame (5) bolt.
Shown in Figure 6, displacement measuring device (7) is made up of displacement transducer (701), sensor stand (702) and manual translation platform (703), displacement transducer (701) adopts the mode of kayser to be arranged on sensor stand (702), sensor stand (702) is arranged on manual translation platform (703), and manual translation platform (703) is arranged on working plate (1).
Shown in Figure 7, voice coil loudspeaker voice coil caliberating device (8) is by voice coil loudspeaker voice coil (801), voice coil suspension (802), manual translation platform (803), permanent magnet (804) and permanent magnet erecting frame (805) composition, voice coil loudspeaker voice coil (801) adopts the mode of kayser to be arranged on voice coil suspension (802), voice coil suspension (802) is arranged on manual translation platform (803), manual translation platform (803) is arranged on working plate (1), permanent magnet (804) adopts the mode of kayser to be arranged on permanent magnet erecting frame (805), permanent magnet erecting frame (805) is arranged on moved cross beam (6).
Shown in Figure 8, damping unit (9) combines (902) by L shape copper sheet (901), opposite pole permanent magnet and permanent magnetism brandreth (903) forms, L shape copper sheet (901) is arranged on moved cross beam (6), opposite pole permanent magnet combination (902) is pasted onto permanent magnetism brandreth (903) inner side respectively, and permanent magnetism brandreth (903) is arranged on working plate (1).
In order to eliminate thruster pipeline and circuit completely to the impact of measuring, to angle of rake supply system and control system height integrated, and adopt remote control mode to control thruster.Moved cross beam (6) is equipped with one end installation propeller of damping unit (9), the supply system of other end installation propeller and telechirics, and utilize balancing weight to make crossbeam Moment balance in the vertical direction, adopt the mode of wireless remote control to control thruster, eliminate the impact of pipeline on thrust measurement completely by the angle of rake mode of complete machine carry.
In order to accurate device can be protected to greatest extent in use procedure, take following measures: displacement transducer (701) can be adjusted by manual translation platform (703) with the distance of moved cross beam (6), be convenient to safeguard bit displacement sensor (701) injury-free, be also convenient to the mechanical zero position of adjusted position displacement sensor (701); Distance between voice coil loudspeaker voice coil (801) and permanent magnet (804) can be adjusted by manual translation platform (803), be convenient to protection voice coil loudspeaker voice coil (801) injury-free with permanent magnet (804), be also convenient to adjust the operating distance between voice coil loudspeaker voice coil (801) and permanent magnet (804); When measurement mechanism is in off working state, utilize overload protection bolt (201,202) stuck moved cross beam (6), avoid moved cross beam (6) to freely swing.
In order to there is stronger versatility to micro-thruster, whole measurement mechanism is equipped with the consistent pivot external member combination of five cover external interfaces, make thrust measurement scope be respectively 0 ~ 100 μ N, 0 ~ 500 μ N, 0 ~ 1mN, 0 ~ 50mN and 0 ~ 100mN, reach the object that changeable fluid carries out high precision thrust measurement.Wherein, the pivot adopted is Riverhawk company goods shelf products, and model is respectively 5006-800,5005-600,5012-800,5010-600,5012-600.
When measurement mechanism is operated in different range, moved cross beam (6) is under propeller thrust effect, and the angle of rotation adopts small angle approximation principle, directly can measure the displacement of the lines that moved cross beam (6) moves.The displacement transducer adopted is the electric vortex type displacement sensor eddyNCDT3300 of MICRO-EPSILON company, and this sensor no-movable part is non-cpntact measurement, probe model ES1, resolution 50nm, range 1mm.
Before carrying out thrust measurement, need to demarcate.Adopt voice coil loudspeaker voice coil (801) and permanent magnet (804) as demarcating agent set, permanent magnet (804) adopts the mode of kayser to be arranged on permanent magnet erecting frame (805), permanent magnet erecting frame (805) is arranged on moved cross beam (6), voice coil loudspeaker voice coil (801) and permanent magnet (804) central axes.When voice coil loudspeaker voice coil (801) passes into the electric current of different size, mutual expelling force is produced between voice coil loudspeaker voice coil (801) and permanent magnet (804), this mutual expelling force is evaluated by high Accuracy Electronic Balance, utilize this mutual expelling force to demarcate thrust-measuring device, calibration process is convenient, remote controlled, can work under vacuum conditions.
Under the present invention is operated in vacuum simulated environment, its course of work is as follows: first, thruster is arranged on one end that moved cross beam (6) is equipped with damping unit (9), angle of rake supply system and telechirics and balancing weight are arranged on the other end, carried out the trim of crossbeam to the distance of rotating shaft by the interpolation of balancing weight and removing and adjustment balancing weight, after trim by moved cross beam (6) bolt on movable vertical beam (3) and edge of a knife frame (5).Secondly, displacement transducer (701) and the relative distance of moved cross beam (6) and the relative distance of voice coil loudspeaker voice coil (801) and permanent magnet (804) is adjusted.Then, after preliminary work is ready, application of vacuum is carried out to vacuum-simulating system, after reaching namely fixed vacuum simulated environment, utilize voice coil loudspeaker voice coil caliberating device (8) to demarcate measurement mechanism.Finally, open thruster, carry out thrust measurement.
Package unit of the present invention can be fully operational in vacuum simulated environment.Design of the present invention is ingenious, compact conformation, be convenient to dismounting, highly versatile, be applicable to quality less than 30 kilograms, the high precision thrust measurement of the process micro thruster of thrust below 100 in the least oxen.
The application is not limited to the content that instructions and claim word segment limit, within the scope of any this area, known modifications and variations all belong to the scope of the application, instructions specific embodiment part is only to exemplifying explanation, is not to concrete restriction of the present invention.
Claims (6)
1. be applicable to a changeable fluid thrust-measuring device for process micro thruster, it is characterized in that: described device comprises working plate (1), fixing vertical beam (2), movable vertical beam (3), the combination of pivot external member (4), edge of a knife frame (5), moved cross beam (6), displacement measuring device (7), voice coil loudspeaker voice coil caliberating device (8) and damping unit (9), working plate (1) carries out leveling by four bolts, fixing vertical beam (2) is arranged on working plate (1), and overload protection bolt (201,202) is housed, pivot external member combination (4) is made up of four pin axial sleeves (401,402,403,404) and two pivots (405,406), each pivot two ends adopt the mode of kayser to install by a pin axial sleeve respectively, and every two pin axial sleeves (401,403 and 402,404) are arranged on fixing vertical beam (2) and movable vertical beam (3) respectively, edge of a knife frame (5) is arranged on movable vertical beam (3), and installs cutter and hold (501), moved cross beam (6) adopts rhs-structure, four sides has M6 threaded hole, be convenient to device install, the edge of a knife (601) is equipped with in bottom, the edge of a knife (601) is placed in cutter and holds on (501), is installing thruster and is supplying and after telechiric device, carry out trim to moved cross beam (6), after trim, together with movable vertical beam (3) and edge of a knife frame (5) bolt, displacement measuring device (7) is made up of displacement transducer (701), sensor stand (702) and manual translation platform (703), displacement transducer (701) adopts the mode of kayser to be arranged on sensor stand (702), sensor stand (702) is arranged on manual translation platform (703), and manual translation platform (703) is arranged on working plate (1), voice coil loudspeaker voice coil caliberating device (8) is by voice coil loudspeaker voice coil (801), voice coil suspension (802), manual translation platform (803), permanent magnet (804) and permanent magnet erecting frame (805) composition, voice coil loudspeaker voice coil (801) adopts the mode of kayser to be arranged on voice coil suspension (802), voice coil suspension (802) is arranged on manual translation platform (803), manual translation platform (803) is arranged on working plate (1), permanent magnet (804) adopts the mode of kayser to be arranged on permanent magnet erecting frame (805), permanent magnet erecting frame (805) is arranged on moved cross beam (6), damping unit (9) combines (902) by L shape copper sheet (901), opposite pole permanent magnet and permanent magnetism brandreth (903) forms, L shape copper sheet (901) is arranged on moved cross beam (6), opposite pole permanent magnet combination (902) is pasted onto permanent magnetism brandreth (903) inner side respectively, and permanent magnetism brandreth (903) is arranged on working plate (1).
2. a kind of changeable fluid thrust-measuring device being applicable to process micro thruster as claimed in claim 1, it is characterized in that: moved cross beam (6) is equipped with one end installation propeller of damping unit (9), the supply system of other end installation propeller and telechirics, and utilize balancing weight to make crossbeam Moment balance in the vertical direction, adopt the mode of wireless remote control to control thruster, eliminate the impact of pipeline on thrust measurement completely by the angle of rake mode of complete machine carry.
3. a kind of changeable fluid thrust-measuring device being applicable to process micro thruster as claimed in claim 1; it is characterized in that: displacement transducer (701) can be adjusted by manual translation platform (703) with the distance of moved cross beam (6); be convenient to safeguard bit displacement sensor (701) injury-free, be also convenient to the mechanical zero position of adjusted position displacement sensor (701).
4. a kind of changeable fluid thrust-measuring device being applicable to process micro thruster as claimed in claim 1; it is characterized in that: the distance between voice coil loudspeaker voice coil (801) and permanent magnet (804) can be adjusted by manual translation platform (803); be convenient to protection voice coil loudspeaker voice coil (801) injury-free with permanent magnet (804), be also convenient to adjust the operating distance between voice coil loudspeaker voice coil (801) and permanent magnet (804).
5. a kind of changeable fluid thrust-measuring device being applicable to process micro thruster as claimed in claim 1; it is characterized in that: when measurement mechanism is in off working state; utilize overload protection bolt (201,202) stuck moved cross beam (6), avoid moved cross beam (6) to freely swing.
6. a kind of changeable fluid thrust-measuring device being applicable to process micro thruster as claimed in claim 1, it is characterized in that: whole measurement mechanism is equipped with the consistent pivot external member combination of five cover external interfaces, make thrust measurement scope be respectively 0 ~ 100 μ N, 0 ~ 500 μ N, 0 ~ 1mN, 0 ~ 50mN and 0 ~ 100mN, reach the object that changeable fluid carries out high precision thrust measurement.
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Cited By (10)
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| CN105784232A (en) * | 2016-03-24 | 2016-07-20 | 北京航空航天大学 | Micro thrust measurement device with damping system |
| CN106197345A (en) * | 2016-09-27 | 2016-12-07 | 中国矿业大学 | A kind of horizontal single shaft electro-hydraulic shaker table displacement measuring device using double-range sensor |
| CN109724771A (en) * | 2018-12-17 | 2019-05-07 | 中国空气动力研究与发展中心低速空气动力研究所 | It is a kind of for measuring the mono-pendulum type balance of underwater sailing body resistance |
| CN109764989A (en) * | 2018-11-02 | 2019-05-17 | 北京航空航天大学 | It can be from the thrust frame locked with calibration |
| CN109870261A (en) * | 2019-03-01 | 2019-06-11 | 西北工业大学 | A kind of lower resistance magnetic suspension platform for microdriver thrust measurement |
| CN110631798A (en) * | 2019-11-01 | 2019-12-31 | 北京星航机电装备有限公司 | Flexible universal overload product for impact test |
| CN110672247A (en) * | 2019-11-13 | 2020-01-10 | 西安近代化学研究所 | Swinging plate type micro-thrust measuring device |
| CN112050988A (en) * | 2020-05-29 | 2020-12-08 | 北京机械设备研究所 | Thrust measurement device and method |
| CN112611495A (en) * | 2020-11-16 | 2021-04-06 | 清华大学 | Device and method for simultaneously measuring thrust and eccentric thrust of main shaft of thruster |
| CN113340499A (en) * | 2021-05-21 | 2021-09-03 | 中国人民解放军战略支援部队航天工程大学 | Micro-thrust measuring device based on cam corner measurement |
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| CN105784232B (en) * | 2016-03-24 | 2019-05-03 | 北京航空航天大学 | A kind of device for measuring micro-thrust with damping system |
| CN105784232A (en) * | 2016-03-24 | 2016-07-20 | 北京航空航天大学 | Micro thrust measurement device with damping system |
| CN106197345A (en) * | 2016-09-27 | 2016-12-07 | 中国矿业大学 | A kind of horizontal single shaft electro-hydraulic shaker table displacement measuring device using double-range sensor |
| CN106197345B (en) * | 2016-09-27 | 2017-09-22 | 中国矿业大学 | A kind of horizontal single shaft electro-hydraulic shaker table displacement measuring device of use double-range sensor |
| CN109764989A (en) * | 2018-11-02 | 2019-05-17 | 北京航空航天大学 | It can be from the thrust frame locked with calibration |
| CN109724771A (en) * | 2018-12-17 | 2019-05-07 | 中国空气动力研究与发展中心低速空气动力研究所 | It is a kind of for measuring the mono-pendulum type balance of underwater sailing body resistance |
| CN109724771B (en) * | 2018-12-17 | 2020-07-14 | 中国空气动力研究与发展中心低速空气动力研究所 | Simple pendulum type balance for measuring underwater vehicle resistance |
| CN109870261A (en) * | 2019-03-01 | 2019-06-11 | 西北工业大学 | A kind of lower resistance magnetic suspension platform for microdriver thrust measurement |
| CN109870261B (en) * | 2019-03-01 | 2020-11-03 | 西北工业大学 | Low-resistance magnetic suspension platform for measuring thrust of micro propeller |
| CN110631798B (en) * | 2019-11-01 | 2021-07-02 | 北京星航机电装备有限公司 | Flexible universal overload product for impact test |
| CN110631798A (en) * | 2019-11-01 | 2019-12-31 | 北京星航机电装备有限公司 | Flexible universal overload product for impact test |
| CN110672247A (en) * | 2019-11-13 | 2020-01-10 | 西安近代化学研究所 | Swinging plate type micro-thrust measuring device |
| CN110672247B (en) * | 2019-11-13 | 2021-08-20 | 西安近代化学研究所 | Swinging plate type micro-thrust measuring device |
| CN112050988A (en) * | 2020-05-29 | 2020-12-08 | 北京机械设备研究所 | Thrust measurement device and method |
| CN112050988B (en) * | 2020-05-29 | 2022-04-19 | 北京机械设备研究所 | Thrust measurement device and method |
| CN112611495A (en) * | 2020-11-16 | 2021-04-06 | 清华大学 | Device and method for simultaneously measuring thrust and eccentric thrust of main shaft of thruster |
| CN113340499A (en) * | 2021-05-21 | 2021-09-03 | 中国人民解放军战略支援部队航天工程大学 | Micro-thrust measuring device based on cam corner measurement |
| CN113340499B (en) * | 2021-05-21 | 2022-06-24 | 中国人民解放军战略支援部队航天工程大学 | Micro-thrust measuring device based on cam corner measurement |
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