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
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[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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