TDLAS-based ammonia gas detection experiment system

An experimental system, ammonia gas technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as atmospheric environmental pollution, achieve the effects of reducing production costs, simple and easy adjustment, and shortening the processing cycle

Inactive Publication Date: 2015-04-29
TIANJIN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

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  • TDLAS-based ammonia gas detection experiment system
  • TDLAS-based ammonia gas detection experiment system
  • TDLAS-based ammonia gas detection experiment system

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0035] The experimental system of the present invention includes: an optical system module composed of a signal generator, a light source driver, a DFB laser, a laser collimator, a gas absorption cell, a detector, a preamplifier, a lock-in amplifier, a data acquisition card and a control system, The aforementioned components are connected by gas paths.

[0036] According to the needs of the experiment and the position of the absorption peak of ammonia, the laser is reasonably selected. During the experimental measurement, a certain concentration of ammonia is passed into the gas absorption cell as the gas to be measured. The modulation signal is generated by the signal generator, which consists of two signals, one is a sawtooth wave scanning signal used to change th...

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Abstract

The invention discloses a TDLAS-based ammonia gas detection experiment system, which comprises a signal generator, a laser driver, a DFB laser device, a laser aligner, a gas absorption pond, a detector, a pre-amplifier, a phase-locked amplifier, a data collection card and a control system, wherein the overall gas absorption pond comprises a light inlet part, a gas chamber and window body, a reflecting part and an emergent light part. Compared with the prior art, the TDLAS-based ammonia gas detection experiment system has the beneficial effects that the experiment requirements of TDLAS-based ammonia gas detection are met; meanwhile, simplicity and easiness of adjustment are met; the processing cycle is shortened; and the production cost is reduced.

Description

technical field [0001] The invention relates to an ammonia detection technology in engine tail gas, in particular to a TDLAS-based ammonia detection experiment system. Background technique [0002] Energy and the environment are the material basis for the survival and development of human society. As a carrier closely related to energy and the environment, the engine has become a necessity for production and life that is closely related to various industries and families. Due to its advantages of low fuel consumption and high torque, diesel engines are widely used in ship power, power generation, irrigation, vehicle power and other fields, especially in the development of vehicle power. With the rapid and continuous growth of the number of diesel vehicles, the pollution of nitrogen oxides (NOx) and particulate matter (PM), the main gas components of diesel vehicle exhaust emissions, has become increasingly prominent. Research and practice have shown that the SCR technology ...

Claims

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Application Information

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IPC IPC(8): G01N21/39
Inventor 赵学玒汪曣杜康蒋学慧孙传强孙运胡雅君王喆
Owner TIANJIN UNIV
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