Light path adjusting mechanism of flue gas analyzer
By designing the optical path adjustment mechanism of the beam-combining module, adjustment module and reference module in the flue gas analyzer, the problem of inconvenient optical path adjustment in the prior art is solved, and efficient alignment of the detection laser and the laser probe and the coaxial output of the indicator light and the detection laser are realized.
Patent Information
- Application Number
- CN202421825072.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The existing flue gas analyzers have inconvenient problems in optical path adjustment, and they cannot effectively realize the alignment between the detection laser and the laser probe, and cannot ensure that the indicator light and the detection laser are coaxial.
An optical path adjustment mechanism including a beam closure module, an adjustment module and a reference module is designed. The beam-combining module uses the optical coupling part to combine the indicator light and detect the laser beam. The adjustment module adjusts the optical path through the five-dimensional adjustment frame. The reference module displays the light spot position through the aperture plate and the indicator plate to achieve alignment of the optical path.
The coaxial output of indicator light and detection laser light is realized, which simplifies the optical path adjustment process and improves the convenience and accuracy of optical path alignment.
Smart Images
Figure CN222994302U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of optical path adjustment, in particular to an optical path adjustment mechanism for a flue gas analyzer. Background Art
[0002] Before the flue gas analyzer is used, the internal optical path needs to be adjusted to align the detection laser with the laser probe. In the prior art, there is no relatively perfect optical path adjustment mechanism for the flue gas analyzer. It mostly relies on high-precision tooling structures and the experience of the light adjustment personnel, and cannot conveniently align the optical path, cannot ensure that the indicator light and the detection laser are coaxial, and cannot well display the position of the indicator light or the detection laser. Therefore, there is an urgent need to provide a convenient optical path adjustment mechanism. Summary of the Utility Model
[0003] In view of the above technical problems, the utility model provides an optical path adjustment mechanism for a flue gas analyzer, including: a flue gas analyzer and an optical path adjustment mechanism; the flue gas analyzer includes a transmitting unit, a first connection section, a first flue gas flange, a second flue gas flange, a heat insulation pad, a second connection section, and a receiving end; the transmitting unit is sequentially connected to the first connection section, the first flue gas flange, the flue gas to be measured, the second flue gas flange, the heat insulation pad, the second connection section, and the receiving end; a laser emitter is arranged inside the transmitting unit for emitting detection laser of a specified wavelength band; a laser detector is arranged inside the receiving end for detecting the intensity of the received laser;
[0004] The optical path adjustment mechanism is arranged inside the transmitting unit, and the optical path adjustment mechanism includes a beam combining module, an adjustment module, and a reference module; the beam combining module is used for combining the indicator light and the detection laser so that the indicator light and the detection laser are output coaxially; the adjustment module is used for adjusting the optical path after beam combining; the reference module is arranged in front of the laser detector for indicating the position of the light spot.
[0005] Optionally, the indicator light is a laser visible to the human eye, and the detection laser is a laser invisible to the human eye.
[0006] Optionally, the beam combining module includes an optical coupling part, a beam combiner, and a collimating part; the optical coupling part is a rectangular solid, and a first connection hole and a second connection hole are opened inside it. One side of the first connection is connected to an indicator light output head, and a first optical coupling module is coaxially arranged on the other side; one side of the second connection hole is connected to a detection laser output head, and a second optical coupling module is coaxially arranged on the other side; coupling lenses are arranged inside both the first optical coupling module and the second optical coupling module for coupling light into the beam combiner;
[0007] The beam combiner includes an indicating light coupling optical fiber, a detection laser coupling optical fiber and an output optical fiber; the first optical coupling module is connected to the indicating light coupling optical fiber, the second optical coupling module is connected to the detection laser coupling optical fiber, and after the indicating light and the detection laser are combined by the beam combiner, they are coaxially output through the output optical fiber; the collimating part is connected to the output optical fiber and is used for collimating the output light after combination.
[0008] Optionally, the collimating part is arranged on a fixing member, the adjusting module is a five-dimensional adjusting bracket, the fixing member is arranged on the five-dimensional adjusting bracket, and the five-dimensional adjusting bracket has the functions of adjusting in the X direction, Y direction, Z direction, pitching and deflection.
[0009] Optionally, the collimating part is arranged on a fixing member, a first reflecting mirror and a second reflecting mirror are arranged at the rear side of the fixing member, and a reflecting film is plated on the first reflecting mirror and the second reflecting mirror for reflecting the indicating light and the detection laser; five-dimensional adjusting brackets are arranged at the lower parts of the first reflecting mirror and the second reflecting mirror, and the five-dimensional adjusting brackets have the functions of adjusting in the X direction, Y direction, Z direction, pitching and deflection.
[0010] Optionally, the reference module includes a first diaphragm, a second diaphragm and an indicating piece coaxially arranged; both the first diaphragm and the second diaphragm are circular pieces with through holes in the middle, and the indicating piece is a circular piece with an indicating ring.
[0011] Optionally, the first diaphragm, the second diaphragm and the indicating piece are all solid pieces, and when the indicating light irradiates on the first diaphragm, the second diaphragm and the indicating piece, the indicating light can be displayed.
[0012] Optionally, the first diaphragm and the second diaphragm are both semi-transparent rubber sheets mixed with fluorescent substances inside, and the surface of the indicating piece is coated with fluorescent substances, and the detection laser can excite visible light after irradiating on the fluorescent substances.
[0013] Optionally, the first diaphragm is arranged at the output end of the transmitting end, the second diaphragm is arranged at the input end of the receiving end, and the indicating piece is arranged on the probe surface of the laser detector.
[0014] Compared with the prior art, the utility model has obtained the following technical effects:
[0015] 1. The beam combination module is adopted to realize the coaxial output of the indicating light and the detection laser. The indicating light output head and the detection laser output head are limited and connected through the optical coupling part. When there is a problem with the indicating light or the detection laser, it is convenient to replace the problem module without secondary optical path adjustment.
[0016] 2. The two setting methods of the adjustment module increase the selectivity of optical path adjustment, which can be adaptively selected according to needs.
[0017] 3. The first diaphragm, the second diaphragm and the indicating piece arranged coaxially facilitate the multi-position display of the light spot and improve the convenience of optical path adjustment. Brief Description of the Drawings
[0018] Figure 1 It is a schematic structural diagram of a flue gas analyzer in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0019] Figure 2 It is a schematic structural diagram of a beam combining module in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0020] Figure 3 It is an exploded structural diagram of a beam combining module in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0021] Figure 4 It is a schematic cross-sectional view of an optical coupling part in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0022] Figure 5 It is a schematic structural diagram of the first implementation manner of an adjustment module in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0023] Figure 6 It is a schematic structural diagram of the second implementation manner of an adjustment module in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention;
[0024] Figure 7 It is a schematic structural diagram of a reference module in an optical path adjustment mechanism of a flue gas analyzer provided by an embodiment of the present invention.
[0025] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiment
[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0027] Such as Figure 1-7As shown in the figure, an embodiment of the present utility model provides an optical path adjustment mechanism for a flue gas analyzer, including: a flue gas analyzer and an optical path adjustment mechanism; the flue gas analyzer includes a transmitting unit 1, a first connection section 2, a first flue gas flange 3, a second flue gas flange 4, a heat insulation pad, a second connection section 5, and a receiving end 6; the transmitting unit 1 is sequentially connected to the first connection section 2, the first flue gas flange 3, the flue gas duct to be measured, the second flue gas flange 4, the heat insulation pad, the second connection section 5, and the receiving end 6; a laser emitter is arranged inside the transmitting unit 1 for emitting detection laser of a specified wavelength band; a laser detector is arranged inside the receiving end 6 for detecting the intensity of the received laser.
[0028] The optical path adjustment mechanism is arranged inside the transmitting unit 1, and the optical path adjustment mechanism includes a beam combining module, an adjustment module, and a reference module; the beam combining module is used for combining the indicating light and the detection laser so that the indicating light and the detection laser are output coaxially; the adjustment module is used for adjusting the optical path after beam combining; the reference module is arranged in front of the laser detector for indicating the position of the light spot.
[0029] Optionally, the indicating light is a laser visible to the human eye (exemplarily, its color is red or green); the detection laser is a laser invisible to the human eye.
[0030] Optionally, the beam combining module includes an optical coupling part 11, a beam combiner 12, and a collimating part 13; the optical coupling part 11 is a rectangular solid, and a first connection hole 111 and a second connection hole 112 are formed inside it. One side of the first connection hole 111 is connected to an indicating light output head, and on the other side, a first optical coupling module 113 is coaxially arranged; one side of the second connection hole 112 is connected to a detection laser output head, and on the other side, a second optical coupling module 114 is coaxially arranged; coupling lenses are arranged inside both the first optical coupling module 113 and the second optical coupling module 114 for coupling the light into the beam combiner 12.
[0031] The beam combiner 12 includes an indicating light coupling optical fiber 121, a detection laser coupling optical fiber 122, and an output optical fiber 123; the first optical coupling module 113 is connected to the indicating light coupling optical fiber 121, the second optical coupling module 114 is connected to the detection laser coupling optical fiber 122, and after the indicating light and the detection laser are combined by the beam combiner 12, they are output coaxially through the output optical fiber 123.
[0032] The collimating part 13 is connected to the output optical fiber 123 for collimating the output light after beam combining.
[0033] Optionally, as Figure 5As described above, the collimating part 13 is arranged on the fixing part 14, the adjusting module is a five-dimensional adjusting frame 15, the fixing part 14 is arranged on the five-dimensional adjusting frame 15, and the five-dimensional adjusting frame 15 has the functions of adjusting in the X direction, Y direction, Z direction, pitching and yaw, so as to realize the adjustment of the collimating part 13 in five directions.
[0034] Optionally, as Figure 6 described above, the collimating part 13 is arranged on the fixing part 14, and a first reflecting mirror 19 and a second reflecting mirror 20 are arranged at the rear side of the fixing part 14. Reflective films are plated on the first reflecting mirror 19 and the second reflecting mirror 20 for reflecting the indicating light and the detection laser; Five-dimensional adjusting frames 15 (not shown) are arranged at the lower parts of the first reflecting mirror 19 and the second reflecting mirror 20, and the five-dimensional adjusting frames 15 have the functions of adjusting in the X direction, Y direction, Z direction, pitching and yaw.
[0035] Optionally, the reference module includes a first aperture plate 16, a second aperture plate 17 and an indicating plate 18 arranged coaxially; The first aperture plate 16 and the second aperture plate 17 are both circular plates with through holes in the middle, and the indicating plate 18 is a circular plate with an indicating ring.
[0036] Optionally, the first aperture plate 16, the second aperture plate 17 and the indicating plate 18 are all solid plates, and when the indicating light irradiates on the first aperture plate 16, the second aperture plate 17 and the indicating plate 18, the indicating light can be displayed.
[0037] Optionally, the first aperture plate 16 and the second aperture plate 17 are both semi-transparent rubber sheets mixed with fluorescent substances inside, and the surface of the indicating plate 18 is coated with fluorescent substances. When the detection laser irradiates on the fluorescent substances, visible light will be excited. So that when the indicating light fails, the detection laser can be directly used for optical path adjustment.
[0038] Optionally, the first aperture plate 16 is arranged at the output end of the transmitting end 1, the second aperture plate 17 is arranged at the input end of the receiving end 6, and the indicating plate 18 is arranged on the probe surface of the laser detector.
[0039] Optionally, the laser detector is a CCD.
[0040] The flue gas analyzer outputs the detection laser, and the detection laser is emitted to the opposite detector according to a specific wavelength. When there is a specific gas, the detection laser is absorbed by the specific gas, and the laser detector detects the molecular absorption light intensity of the measured gas, so as to calculate the component content of the measured gas and obtain the concentration of the gas.
[0041] During the optical path adjustment, insert the indicating light output head and the detection laser output head into the beam combining module respectively, so that the indicating light and the detection laser are output coaxially; use the adjustment module to adjust the optical path after beam combining; when the optical axes of the indicating light or the detection laser deviate from the centers of the first diaphragm and the second diaphragm, they will shine on the diaphragm. According to the position of the light spot shining on the reference module, make an adaptive adjustment to the adjustment module until the light spot is only shown at the center position of the indicating piece, and finally realize the alignment of the detection laser and the laser detector. After the adjustment is completed, remove the reference module and lock the adjustment module.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.
Claims
1. An optical path adjustment mechanism for a flue gas analyzer, characterized in that: include: A flue gas analyzer and an optical path adjustment mechanism; the flue gas analyzer comprises a transmitting unit, a first connecting section, a first flue flange, a second flue flange, a thermal insulation pad, a second connecting section and a receiving end; the transmitting unit is sequentially connected to the first connecting section, the first flue flange, the flue to be tested, the second flue flange, the thermal insulation pad, the second connecting section and the receiving end; a laser transmitter is arranged inside the transmitting unit for emitting a detection laser of a specified wavelength band; a laser detector is arranged inside the receiving end for detecting the intensity of the received laser; The optical path adjustment mechanism is arranged inside the emitting unit, and the optical path adjustment mechanism includes a beam combining module, an adjustment module and a reference module; the beam combining module is used to combine the indicator light and the detection laser so that the indicator light and the detection laser are output coaxially; the adjustment module is used to adjust the optical path after beam combining; the reference module is arranged in front of the laser detector and is used to indicate the position of the light spot.
2. The optical path adjustment mechanism according to claim 1, characterized in that: in, The indicator light is a laser visible to human eyes, and the detection laser is a laser invisible to human eyes.
3. The optical path adjustment mechanism according to claim 2, characterized in that: in, The beam combining module comprises an optical coupling part, a beam combiner and a collimating part; the optical coupling part is a rectangular entity, and a first connection hole and a second connection hole are provided inside the optical coupling part; one side of the first connection hole is connected to the indicator light output head, and the other side is coaxially provided with a first optical coupling module; one side of the second connection hole is connected to the detection laser output head, and the other side is coaxially provided with a second optical coupling module; the first optical coupling module and the second optical coupling module are both provided with coupling lenses inside, for coupling light into the beam combiner; The beam combiner includes an indicator light coupling fiber, a detection laser coupling fiber and an output fiber; the first light coupling module is connected to the indicator light coupling fiber, the second light coupling module is connected to the detection laser coupling fiber, and the indicator light and the detection laser are combined by the beam combiner and coaxially output through the output fiber; the collimating part is connected to the output fiber and is used to collimate the combined output light.
4. The optical path adjustment mechanism according to claim 3, characterized in that: in, The collimating part is arranged on the fixing part, the adjusting module is a five-dimensional adjusting frame, the fixing part is arranged on the five-dimensional adjusting frame, and the five-dimensional adjusting frame has the functions of adjusting in the X direction, the Y direction, the Z direction, the pitch and the deflection.
5. The optical path adjustment mechanism according to claim 3, characterized in that: in, The collimating part is arranged on the fixing part, and a first reflector and a second reflector are arranged on the rear side of the fixing part. The first reflector and the second reflector are coated with a reflective film for reflecting the indication light and detecting the laser. A five-dimensional adjustment frame is arranged at the lower part of the first reflector and the second reflector, and the five-dimensional adjustment frame has the functions of adjusting in the X direction, the Y direction, the Z direction, the pitch and the deflection.
6. The optical path adjustment mechanism according to claim 3, characterized in that: in, The reference module includes a first aperture piece, a second aperture piece and an indicator piece which are coaxially arranged; the first aperture piece and the second aperture piece are both circular pieces with a through hole in the middle, and the indicator piece is a circular piece with an indicator ring.
7. The optical path adjustment mechanism according to claim 6, characterized in that: in, The first aperture piece, the second aperture piece, and the indicator piece are all solid pieces, and when the indicator light is irradiated on the first aperture piece, the second aperture piece, and the indicator piece, the indicator light can be displayed.
8. The optical path adjustment mechanism according to claim 6, characterized in that: in, The first aperture piece and the second aperture piece are both translucent rubber pieces, and fluorescent substances are mixed inside them. The surface of the indicator piece is coated with fluorescent substances, and the detection laser will stimulate visible light when irradiated on the fluorescent substances.
9. The optical path adjustment mechanism according to claim 7 or 8, characterized in that: in, The first aperture plate is arranged at the output end of the transmitting end, the second aperture plate is arranged at the input end of the receiving end, and the indicator plate is arranged on the probe surface of the laser detector.