IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0329575
(2008-12-06)
|
등록번호 |
US-7856334
(2011-02-14)
|
발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
8 |
초록
▼
A method is disclosed whereby a laser-based spherical coordinate measurement system is dynamically calibrated. A mechanical oscillator, such as, but not limited to, a Foucault pendulum is used to generate periodic motions which can be fitted to Fourier series models. The residuals between the experi
A method is disclosed whereby a laser-based spherical coordinate measurement system is dynamically calibrated. A mechanical oscillator, such as, but not limited to, a Foucault pendulum is used to generate periodic motions which can be fitted to Fourier series models. The residuals between the experimental measurements and the model can provide information which can be used to calibrate the instrument. The calibration information is used to augment the ASME B89.4.19-2006 standard to improve sensitivity to cyclic errors and include the servo systems.
대표청구항
▼
What is claimed is: 1. A method comprising; (a) producing mechanical oscillations by a first oscillator, wherein said first oscillator is placed in motion; (b) retroreflecting electromagnetic radiation from a first virtual point mechanically fixed to said first oscillator; wherein said first virtua
What is claimed is: 1. A method comprising; (a) producing mechanical oscillations by a first oscillator, wherein said first oscillator is placed in motion; (b) retroreflecting electromagnetic radiation from a first virtual point mechanically fixed to said first oscillator; wherein said first virtual point is also placed in motion; (c) measuring time; (d) tracking said first virtual point from a first spherical coordinate measurement system; (e) measuring from said first spherical coordinate measurement system to said first virtual point, at a plurality of times tn, to produce a plurality of measurements M1,n, wherein each element n of said M1,n is an ordered set comprising; tn and at least one parameter synchronized with said tn from the group consisting of; range r1,n, a first angle α1,n, a second angle θ1,n, and combinations thereof; (f) storing said plurality of M1,n by a processor and a memory storage device; (g) determining at least one calibration parameter of said first spherical coordinate measurement system based at least in part on said M1,n; and (h) storing said calibration parameter. 2. The method of claim 1 wherein said first oscillator is a pendulum. 3. The method of claim 1 wherein said first oscillator is a mass suspended by a spring. 4. The method of claim 1 wherein said first spherical coordinate measurement system is an absolute distance laser tracker. 5. The method of claim 1 wherein said first spherical coordinate measurement system is an interferometer distance laser tracker. 6. The method of claim 1 wherein said first spherical coordinate measurement system is an automated total station. 7. The method of claim 1 wherein said determining comprises fitting said M1,n to a first mathematical function. 8. The method of claim 7 wherein said first mathematical function is a Fourier series. 9. The method of claim 7 wherein said first mathematical function comprises functions for a length and two angles. 10. The method of claim 7 further comprises computing the residual between M1,n and said first mathematical function. 11. The method of claim 1 further comprising: (a) tracking said first virtual point from a second spherical coordinate measurement system; (b) measuring from said second spherical coordinate measurement system to said first virtual point, at a plurality of times tn, to produce a plurality of measurements M2,n, wherein each element n of said M2,n is an ordered set comprising; tn and at least one parameter synchronized with said tn from the group consisting of; range r2,n, a first angle α2,n, a second angle θ2,n, and combinations thereof; (c) storing said plurality of M2,n by a processor and a memory storage device; (d) determining at least one calibration parameter of said first spherical coordinate measurement system based at least in part on said M1,n and said M2,n. 12. The method of claim 11 further comprising: (a) tracking said first virtual point from a third spherical coordinate measurement system; (b) measuring from said third spherical coordinate measurement system to said first virtual point, at a plurality of times tn, to produce a plurality of measurements M3,n, wherein each element n of said M3,n is an ordered set comprising; tn and at least one parameter synchronized with said tn from the group consisting of; range r3,n, a first angle α3,n, a second angle θ3,n, and combinations thereof; (c) storing said plurality of M3,n by a processor and a memory storage device; (d) determining at least one calibration parameter of said first spherical coordinate measurement system based at least in part on said M1,n, said M2,n, and M3,n. 13. The method of claim 12 further comprising: (a) tracking said first virtual point from a fourth spherical coordinate measurement system; (b) measuring from said fourth spherical coordinate measurement system to said first virtual point, at a plurality of times tn, to produce a plurality of measurements M4,n, wherein each element n of said M4,n is an ordered set comprising; tn and at least one parameter synchronized with said tn from the group consisting of; range r4,n, a first angle α4,n, a second angle θ4,n, and combinations thereof; (c) storing said plurality of M4,n by a processor and a memory storage device; (d) determining at least one calibration parameter of said first spherical coordinate measurement system based at least in part on said M1,n, said M2,n, said M3,n, and said M4,n. 14. The method of claim 1 wherein said calibration parameter is a cyclic error. 15. The method of claim 1 wherein said calibration parameter is a scale error. 16. The method of claim 1 wherein said calibration parameter is a servo system tuning and control error. 17. The method of claim 1 wherein said calibration parameter is a hysteresis error. 18. The method of claim 1 wherein said calibration parameter is a multiple reflection error.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.