公开(公告)号：US20180238798A1

公开(公告)日：2018-08-23

申请号：US15959179

申请日：2018-04-21

Applicant: Space Engineering University

Inventor： Wei RAO ,  Guangyu WANG ,  Yanji HONG ,  Junling SONG

IPC: G01N21/39 ,  G01J3/42 ,  G01N21/3504

CPC classification number: G01N21/39 ,  G01J3/42 ,  G01J2003/423 ,  G01N21/3504 ,  G01N2021/399 ,  G01N2201/0612 ,  G01N2201/129

Abstract: The present invention provides a Voigt line shape fitting method, including step 1: Calculate a Gauss line shape function and a Lorentz line shape function, and calculate a Voigt line shape function. Step 2: For determined line shape parameters to be fitted, calculate partial derivatives of the Voigt line shape function with respect to the parameters, convert a partial derivative of the Voigt line shape function with respect to a parameter into a partial derivative of the Gauss line shape function or the Lorentz line shape function with respect to the parameter. Step 3: Substitute the Voigt line shape function and the partial derivative of the Voigt line shape function with respect to the parameter to be fitted, into a least squares algorithm step, perform least squares fitting calculation, and determine whether to terminate the least squares fitting calculation or return to step 1 to perform next iterative calculation.

公开(公告)号：US20180245988A1

公开(公告)日：2018-08-30

申请号：US15959225

申请日：2018-04-21

Applicant: Space Engineering University

Inventor： Yanji HONG ,  Junling SONG ,  Guangyu WANG ,  Wei RAO

IPC: G01K7/12 ,  G01K11/00 ,  G01N21/39 ,  G01N21/47

CPC classification number: G01K7/12 ,  G01J3/0202 ,  G01K11/003 ,  G01K11/32 ,  G01N21/39 ,  G01N21/4795 ,  G01N21/85 ,  G01N2021/399 ,  G01N2021/8578 ,  G01N2201/066

Abstract: The present invention discloses a multi-lightpath and multi-angle measurement apparatus, including an electrically controlled rotary table, electronically controlled translation tables, a laser transmitting/receiving end face, laser couplers, a multipath data acquisition card, a laser controller, a translation controller, an etalon, a laser, detectors, and a computer. The measurement apparatus uses an all-fiber coupling structure, and two ends of the laser transmitting/receiving end face are respectively fixed on two electronically controlled translation tables. Therefore, a maximum area measured by the apparatus is 350 mm×350 mm, and an adjustable minimum translation distance is 1 mm. Bottoms of the translation tables are fixed on the electrically controlled rotary table. Featuring an ingenious design and a compact structure, the whole apparatus is easy to disassemble and easy to operate. The apparatus has high universality, and can implement two-dimensional measurement in a high-temperature combustion flow field.