CN107085126A - A kind of LDV calibrating installation measured based on Dynamic Radius - Google Patents
A kind of LDV calibrating installation measured based on Dynamic Radius Download PDFInfo
- Publication number
- CN107085126A CN107085126A CN201710352955.7A CN201710352955A CN107085126A CN 107085126 A CN107085126 A CN 107085126A CN 201710352955 A CN201710352955 A CN 201710352955A CN 107085126 A CN107085126 A CN 107085126A
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- China
- Prior art keywords
- ldv
- rotating disk
- dynamic radius
- wire
- calibrating installation
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
Abstract
Present invention relates particularly to the LDV calibrating installation measured based on Dynamic Radius, belong to measuring wind speed and calibration field.Motor, air floating shaft system, air-float guide rail, LDV, standard rotating disk, measurement grating, pedestal and computer.The present invention is measured as core technology with Dynamic Radius of the standard rotating disk under different rotating speeds, the Dynamic Radius of standard rotating disk is obtained using LDV mode, the standard linear velocity that standard rotating disk is produced is gathered simultaneously, speed is measured with LDV to be compared, complete the calibration to LDV, the present invention can realize tracing to the source for flow parameters, be tested the speed calibration method better than tradition.The present invention improves the uncertainty level of calibrating installation using high-precision motor, the accurate air floating shaft system of grinding technics manufacture and air-float guide rail simultaneously.
Description
Technical field
Present invention relates particularly to the LDV calibrating installation measured based on Dynamic Radius, belong to measuring wind speed and
Calibration field.
Background technology
The anemometer calibration carried out under normal circumstances in normal temperature wind-tunnel, its normative reference is mostly standard pitot tube.And
Pitot tube, which tests the speed when compared with low velocity, larger uncertainty, is influenceed, all can not by compressibility of fluid when flow velocity is higher
Meet the demand of present flow velocity measurement.General way is by the use of one group of Pitot tube as normative reference, periodically both at home and abroad at present
Mutually compared, but this method can not be realized and traced to the source.
Laser Doppler vibration principle that the present invention is used it gather trace particle in fluid mass using laser
Speed, greatly overcome the shortcoming of Pitot tube measurement, have the advantages that to trace to the source, the anti-interference, scope that tests the speed it is wide, in recent years
Rapid development and application are arrived；But laser surveying instrument is accurate and affected by environment larger, if without reliable calibrating installation,
Accurately trace to the source and transmission will be unable to carry out.The external calibration to LDV has some to be related to, and mainly has
The glass rotary disc calibrating installation that German federal physical study institute (PTB) is carried out, it demarcates speed about 1m/s or so, using disk
The frame mode of circumference uniform distribution trace particle；U.S. NIST has also carried out the work of this respect, but its calibrating installation does not consider
The uncertainty factor that the Dynamic Radius of rotating circular disk is brought into；Although laser Doppler vibration has been applied in terms of domestic ten
Divide extensive, but be directed to the report in terms of the calibration of tachymeter and few.Chinese utility model patent CN202421211U (Doppler
Anemometry laser radar speed accurate calibration instrument) it is related to the calibration of laser-Doppler windfinding radar, but the principle of its foundation is laser
Aerosol scattering spectrum it is consistent with the scattering spectra of laser hard goal, the laser beam for sending laser radar be respectively radiated to it is soft (with the wind
The aerosol moved together), in the target moved firmly, calibration is realized by soft, hard goal speed comparison, with the present invention's
Principle and endpoint technique are different.The calibration of LDV is carried out using simulation trace particle, and considers Dynamic Radius
Introduced uncertainty, domestic also not disclosed research report.Conventional calibration method is nearly all by comparison at present
Experiment, due to various methods and the difference of instrument, measurement result itself also all has error, therefore these methods can not be real
Show tracing to the source for speed calibration.
The content of the invention
The invention aims to solve conventional wind speed calibration method to realize the problem of tracing to the source of wind speed calibration, propose
A kind of LDV calibrating installation measured based on Dynamic Radius.
The purpose of the present invention is achieved through the following technical solutions.
A kind of LDV calibrating installation (hereinafter referred to as " LDV measured based on Dynamic Radius
Calibrating installation "), including motor, air floating shaft system, air-float guide rail, LDV, standard rotating disk, measurement grating,
Pedestal and computer.
Motor includes the first motor and the second motor；
Standard rotating disk includes wire, bolt and through hole；
First motor, the first measurement grating, air floating shaft system, air-float guide rail and the second motor are encapsulated in pedestal
Interior, the first motor is connected with air floating shaft system, and standard rotating disk is arranged on air floating shaft system；First motor, air floating shaft system
Being capable of the translation on air-float guide rail with standard rotating disk.The second measurement grating for measuring displacement is installed on pedestal, is used for
Export diameter parameters；First measurement grating of measurement rotating speed is installed on the first motor, the rotating speed of standard rotating disk is adopted
Collection.
The course of work：
First motor driving air-bearing shafts frenulum moves standard turntable rotation, and the rotating speed is measured and defeated by the first measurement grating
Enter computer, the vertically-mounted wire in any place of the circumference of standard rotating disk, for simulating trace particle.When wire rotate into
When the measurement of LDV is internal, LDV is the linear velocity for measuring metal；Second driving simultaneously
Motor belt motor moves air-float guide rail in standard disk diameter direction to LDV translation, after a mobile diametral distance
Wire is again introduced into LDV, and the distance of wire movement is now measured by the second measurement grating, should be away from
From the Dynamic Radius value under as current rotating speed；The standard rotating disk that computer is measured by Dynamic Radius value and the first measurement grating
Rotating speed calculate and obtain the linear velocity that wire on standard rotating disk is moved, by the linear speed angle value and LDV of wire
The linear speed angle value of wire is compared on the standard rotating disk that instrument is measured, and then completes the calibration work to LDV
Make.
Beneficial effect：
1. the present invention is measured as core technology with Dynamic Radius of the standard rotating disk under different rotating speeds, using laser-Doppler
The mode of testing the speed obtains the Dynamic Radius of standard rotating disk, while the standard linear velocity that the standard of collection rotating disk is produced, with laser-Doppler
Tachymeter measures speed and is compared, and completes the calibration to LDV, and the present invention can realize flow parameters
Trace to the source, tested the speed calibration method better than tradition.
2. the present invention is improved using high-precision motor, the accurate air floating shaft system of grinding technics manufacture and air-float guide rail
The uncertainty level of calibrating installation.
Brief description of the drawings
Fig. 1 is the LDV calibrating installation structural representation of the present invention；
Fig. 2 is Plays turntable structure schematic diagram of the present invention；
Fig. 3 is the LDV calibrating installation workflow schematic diagram of the present invention；
Wherein, the motors of 1- first, 2- first measurement grating, 3- air floating shaft systems, 4- standards rotating disk, 5- air-float guide rails,
The measurements of 6- second grating, 7- LDVs, the motors of 8- second, 9- pedestals, 10- bolts, 11- through holes, 12- platings
Golden tungsten filament.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in figures 1 and 3, a kind of LDV calibrating installation measured based on Dynamic Radius, including first
How general the measurement of motor 1, first grating 2, air floating shaft system 3, standard rotating disk 4, the measurement of air-float guide rail 5, second grating 6, laser is
Strangle tachymeter 7, the second motor 8, pedestal 9, bolt 10, through hole 11, gold-plated tungsten wire 12 and computer.
As shown in Fig. 2 the material of standard rotating disk 4 be aluminium alloy, a diameter of 200~250mm, upper and lower side be thickness 5~
10mm Thin Disk, maximum speed reaches 4000r/min, maximum adjustable speed 40m/s；Cylinder in the middle of standard rotating disk 4
There is a through hole 11 part along the radial direction of standard rotating disk.The through-hole diameter according to the optical properties of LDV determine,
Through hole 11 can be passed through by ensureing the measurement body of LDV 7.Hung down in the excircle any position of standard rotating disk 4 screw
A diameter of 1~the 10um of straight rigidity clamping wire, material is preferably gold-plated tungsten wire 12, is used as simulation trace particle, gold-plated tungsten
The position of silk 12 is perpendicular to the axis of central through hole, and such guarantee standard rotating disk 4 that is designed to translated a diameter displacement
Afterwards, gold-plated tungsten wire 12 can be again introduced into LDV 7 measurement in vivo, LDV 7 is surveyed again
Obtain the linear velocity of gold-plated tungsten wire 12.Bolt 10 is respectively intended to clamping gold-plated tungsten wire and fixed standard rotating disk 4 to be multipair, as with
Re-mount to keep dynamic balancing of the standard rotating disk 4 when high speed rotates；First motor 1 and the second motor 8 are respectively
Separately-loaded brushless torque motor；Air floating shaft system 3 and the equal attrition process of air-float guide rail 5 are formed, and the blowing pressure is kept in the course of work
For 0.4MPa, stable drive, contactless friction.
The course of work：
First motor 1 driving air floating shaft system 3 drives standard rotating disk 4 to rotate, and the rotating speed of standard rotating disk 4 is by the first measurement
Grating 2 measures and inputs computer；The two beam laser beams sent by school LDV 7 cross diameter with standard rotating disk 4
Centre bore fully horizontally, when standard rotating disk 4 is moved to position A on air-float guide rail 5, simulation particle enters school laser-Doppler
During tachymeter, LDV 7 measures the linear velocity of gold-plated tungsten wire 12；Standard rotating disk 4 continues to translate, straight by one
At the B of footpath to position, now simulation particle be again introduced into LDV measurement in vivo, LDV 7
The linear velocity of gold-plated tungsten wire 12 is measured again, and the translation distance that the second measurement grating 6 is obtained is the kinetic diameters under the rotating speed, by
This obtains standard rotary speed：
Wherein：
R is rotating disk Dynamic Radius, m；
N is the first measurement grating measuring rotating speed, r/min.
The rate signal v that computer will be calculated by standard rotary speed and Dynamic Radius1And LDV
Measure rate signal v2It is acquired and analyzes, that is, completes the calibration process to LDV.
Claims (7)
1. a kind of LDV calibrating installation measured based on Dynamic Radius, it is characterised in that including：First driving
Motor (1), first measurement grating (2), air floating shaft system (3), standard rotating disk (4), air-float guide rail (5), second measurement grating (6),
LDV (7), the second motor (8), pedestal (9), bolt (10), through hole (11) and gold-plated tungsten wire (12)；
The course of work：
First motor (1) driving air floating shaft system (3) drives standard rotating disk (4) rotation, and the rotating speed is surveyed by the first measurement grating
(2) obtain and input computer, the vertically-mounted wire in any place of the circumference of standard rotating disk (4), for simulating trace particle；When
When wire is rotated into LDV (7), LDV (7) is the linear velocity for measuring metal；Simultaneously
Second motor (8) drives air-float guide rail (5) in standard rotating disk (4) diametric(al) to LDV (5) translation,
When wire is again introduced into LDV (5) after a mobile diametral distance, now by the second measurement grating (6)
Measure the Dynamic Radius value under the distance of wire movement, the as current rotating speed of the distance；Computer by Dynamic Radius value and
The rotating speed for the standard rotating disk (4) that first measurement grating (2) is measured calculates the linear speed for obtaining that wire is moved on standard rotating disk (4)
The linear speed angle value of wire on degree, the standard rotating disk (4) that the linear speed angle value of wire and LDV (7) are measured
It is compared, and then completes the calibration to LDV (7).
2. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：Separately-loaded brushless torque motor is respectively adopted in first motor (1) and the second motor (8), and the range of speeds is 0
~4000r/min.
3. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：Normal disc (4) diameter range is 100mm to 200mm, and material is aluminium alloy, and the upper and lower side of normal disc (4) is thin
Disk, center section is cylinder, and through hole is provided with along the radial direction of disk in this cylinder surrounding.
4. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：Wire is gold-plated tungsten wire (12), and diameter range is 1~10um；Gold-plated tungsten wire (12) position is perpendicular to centre bore
Axis.
5. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：The positional accuracy of standard rotating disk (4) is 1um.
6. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：Standard rotating disk (4) maximum speed reaches 4000r/min, maximum adjustable speed 40m/s.
7. a kind of LDV calibrating installation measured based on Dynamic Radius according to claim 1, it is special
Levy and be：Combined standard uncertainty is uc=0.025m/s.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016111835136 | 2016-12-20 | ||
| CN201611183513 | 2016-12-20 |
Publications (1)
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| CN107085126A true CN107085126A (en) | 2017-08-22 |
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| CN201710352955.7A Pending CN107085126A (en) | 2016-12-20 | 2017-05-18 | A kind of LDV calibrating installation measured based on Dynamic Radius |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470863A (en) * | 2019-09-03 | 2019-11-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of speed measuring device calibration system and scaling method |
| CN110596416A (en) * | 2019-10-27 | 2019-12-20 | 江西中船航海仪器有限公司 | Linear speed detection and calibration device |
| CN111122906A (en) * | 2019-12-05 | 2020-05-08 | 安徽皖仪科技股份有限公司 | Calibration method for three-point laser type light-cutting speed and acceleration tester |
| CN111141931A (en) * | 2020-02-25 | 2020-05-12 | 中北大学 | Device and method for laser interferometer speed calibration |
| KR102173229B1 (en) * | 2019-09-03 | 2020-11-03 | 한국해양과학기술원 | Ldv calibration apparatus which minimizes flow effect |
| CN112964903A (en) * | 2021-02-23 | 2021-06-15 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Laser Doppler speed measuring device with three-coordinate precision positioning |
| CN113340560A (en) * | 2021-07-05 | 2021-09-03 | 中国空气动力研究与发展中心低速空气动力研究所 | Doppler interferometer calibration and debugging system, calibration method and debugging method |
| CN114152778A (en) * | 2021-12-23 | 2022-03-08 | 中国科学院西安光学精密机械研究所 | Calibration device and method of laser Doppler velocimeter based on lithium niobate modulator |
| CN114258493A (en) * | 2019-08-22 | 2022-03-29 | M&H测量技术有限公司 | Device for calibrating the speed of a moving axis of a machine |
| WO2023151169A1 (en) * | 2022-02-08 | 2023-08-17 | 交通运输部公路科学研究所 | Deflection calibration apparatus and method for laser type high-speed deflection tester |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114258493A (en) * | 2019-08-22 | 2022-03-29 | M&H测量技术有限公司 | Device for calibrating the speed of a moving axis of a machine |
| CN110470863A (en) * | 2019-09-03 | 2019-11-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of speed measuring device calibration system and scaling method |
| KR102173229B1 (en) * | 2019-09-03 | 2020-11-03 | 한국해양과학기술원 | Ldv calibration apparatus which minimizes flow effect |
| CN110470863B (en) * | 2019-09-03 | 2021-05-25 | 中国空气动力研究与发展中心超高速空气动力研究所 | Speed measuring device calibration system and calibration method |
| CN110596416A (en) * | 2019-10-27 | 2019-12-20 | 江西中船航海仪器有限公司 | Linear speed detection and calibration device |
| CN111122906B (en) * | 2019-12-05 | 2022-03-18 | 安徽皖仪科技股份有限公司 | Calibration method for three-point laser type light-cutting speed and acceleration tester |
| CN111122906A (en) * | 2019-12-05 | 2020-05-08 | 安徽皖仪科技股份有限公司 | Calibration method for three-point laser type light-cutting speed and acceleration tester |
| CN111141931A (en) * | 2020-02-25 | 2020-05-12 | 中北大学 | Device and method for laser interferometer speed calibration |
| CN112964903A (en) * | 2021-02-23 | 2021-06-15 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Laser Doppler speed measuring device with three-coordinate precision positioning |
| CN112964903B (en) * | 2021-02-23 | 2023-03-10 | 北京市计量检测科学研究院(北京市能源计量监测中心) | Laser Doppler speed measuring device with three-coordinate precision positioning |
| CN113340560A (en) * | 2021-07-05 | 2021-09-03 | 中国空气动力研究与发展中心低速空气动力研究所 | Doppler interferometer calibration and debugging system, calibration method and debugging method |
| CN113340560B (en) * | 2021-07-05 | 2022-05-17 | 中国空气动力研究与发展中心低速空气动力研究所 | Doppler interferometer calibration and debugging system, calibration method and debugging method |
| CN114152778A (en) * | 2021-12-23 | 2022-03-08 | 中国科学院西安光学精密机械研究所 | Calibration device and method of laser Doppler velocimeter based on lithium niobate modulator |
| CN114152778B (en) * | 2021-12-23 | 2022-09-13 | 中国科学院西安光学精密机械研究所 | Calibration device and method of laser Doppler velocimeter based on lithium niobate modulator |
| WO2023151169A1 (en) * | 2022-02-08 | 2023-08-17 | 交通运输部公路科学研究所 | Deflection calibration apparatus and method for laser type high-speed deflection tester |
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