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Device and method for measuring gaseous ammonia based on femtosecond laser-induced fluorescence

A technology of femtosecond laser and induced fluorescence, which is applied in the field of femtosecond laser spectroscopy to achieve the effects of high peak energy, improved efficiency and short pulse width

Pending Publication Date: 2020-09-22
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no related work based on femtosecond laser-induced fluorescence to achieve gaseous ammonia (NH 3 ) measurement, the present invention intends to propose a method based on femtosecond laser-induced fluorescence measurement of gaseous ammonia (NH 3 )Methods

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  • Device and method for measuring gaseous ammonia based on femtosecond laser-induced fluorescence
  • Device and method for measuring gaseous ammonia based on femtosecond laser-induced fluorescence

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The present invention is mainly based on femtosecond laser-induced fluorescence technology to realize gaseous ammonia (NH 3 ) measurement, such as figure 1 Shown is the device for measuring gaseous ammonia based on femtosecond laser-induced fluorescence of the present embodiment, including ammonia gas (NH 3 ) of the flow field 4 to be measured, also includes a femtosecond laser 1, an optical parametric amplifier 2, a focusing lens 3, a beam stopper 5, an imaging lens 6, a spectrometer 7, an ICCD camera 8 and a computer 9, and the spectrometer 7 is arranged on the flow field to be measured On one side of the field 4, the spectrometer 7 is connected to the ICCD camera 8, and bo...

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Abstract

The invention discloses a device and a method for measuring gaseous ammonia based on femtosecond laser-induced fluorescence. The device comprises a to-be-measured flow field containing ammonia gas (NH3), a femtosecond laser, an optical parameter amplifier, a focusing lens, a light beam cut-off device, an imaging lens, a spectrograph, an ICCD camera and a computer, the spectrograph is arranged on one side of the to-be-measured flow field; the spectrograph is connected with the ICCD camera; the spectrograph and the ICCD camera are connected with the computer; a laser emitted by the femtosecond laser is adjusted through the Topas to obtain laser with the wavelength of 305 nm, the laser with the wavelength of 305 nm sequentially passes through the focusing lens, the to-be-measured flow field and the light beam cut-off device, and the imaging lens is arranged between the to-be-measured flow field and the spectrograph.

Description

technical field [0001] The invention relates to the field of femtosecond laser spectroscopy technology, the field of plasma and the field of gas diagnosis, and specifically realizes the realization of gaseous ammonia (NH 3 )Measurement. Background technique [0002] Realize the gaseous ammonia (NH 3 ) measurement is of great significance in many fields. First of all, as a chemical commonly used in the chemical industry, NH 3 Widely used in chemical fertilizer, refrigeration and other industries, it has pungent smell, poisonous, if exposed to NH for a long time 3 In the environment of the environment, it will cause certain damage to the body, and NH in the atmospheric environment 3 The detection can be reduced to some extent due to the NH 3 The hazards of leakage [1] . Secondly, the denitrification process of combustion equipment such as diesel engines is also inseparable from NH 3 . The urea in the diesel engine aftertreatment device decomposes into NH 3 , can effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01J3/44G01J3/10G01J3/12
CPCG01N21/6402G01J3/4406G01J3/10G01J3/12
Inventor 李博刘吉绪张大源高强
Owner TIANJIN UNIV
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