Stable and compact laser transceiver integrated detection optical path structure

Abstract

The invention discloses a stable compact type laser-transceiving integrated detection light path structure. The stable compact type laser-transceiving integrated detection light path structure comprises a laser transceiving device and a pyramid reflector device, wherein laser output by a host laser of a monitor is coupled by an external transmission optical fiber flange, so as to enter a tail fiber in a covering cylinder, the laser is conducted to a laser alignment mirror by the tail fiber, the laser is emitted from a receiving mirror in a center opening after being aligned, passes through a sealing window mirror and a target gas detection area and then arrives at an opposite pyramid reflector of the pyramid reflector device, so as to form a reflected light beam and return along the direction of a main light path, the extended return light beam is received and laterally reflected and focused by the receiving mirror, so as to arrive at a receiving lens and a detector which is used for detecting an optical signal of a receiving spectrum, and an electrical signal output by the detector is transmitted to an output interface by virtue of a connecting wire and then transmitted to a host by virtue of an external cable. According to the stable compact type laser-transceiving integrated detection light path structure, a spectral absorption optical path is doubled, the detection precision can be increased, the application range can be extended, and the anti-vibration performance is obviously improved.

Description

technical field [0001] The invention mainly relates to the engineering application field of flue ammonia escape on-line monitoring, in particular to a stable and compact laser transceiver integrated detection optical path structure. Background technique [0002] At present, most of the flue ammonia escape spectrum monitoring instruments installed in situ adopt the optical path system device with separate sending and receiving. The shortcoming of this installation and working method is mainly due to the limitation of the single-pass absorption spectrum, which has a certain impact on the measurement accuracy. . Also based on the in-situ installation method of the flue, this monitor adopts a transceiver integrated detection optical path structure system. Using the round-trip optical path, the absorption optical path can be doubled, not only the measurement accuracy can be improved, but the application range can also be expanded. Widening, especially for industrial systems with...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the flue ammonia escape spectrum monitoring instruments installed in situ adopt the optical path system device with separate sending and receiving. The shortcomings of this installation and working method are mainly limited by the single-pass absorption spectrum, which has a certain impact on the measurement accuracy.

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