Optical path pool device with adjustable optical path

Abstract

The invention discloses an optical path adjustable optical path pool device which comprises a shell, an air chamber is arranged in the shell, one side of the air chamber is connected with a first containing groove in a conducting mode, a first plane-concave lens is rotatably connected in the first containing groove, an emitting hole is formed in the first plane-concave lens, and a mounting base is fixedly connected to the first plane-concave lens. A through hole is formed in the position, corresponding to the emergent hole, of the mounting base, a photoelectric detector is fixedly connected to the through hole, a second containing groove is connected to the other side of the gas chamber in a conducting mode, a second plane-concave lens is fixedly connected into the second containing groove, an incident hole is formed in the second plane-concave lens, and a laser generator is fixedly connected to the incident hole; the first plano-concave lens is driven by the motor to rotate, so that the position of the emergent hole is adjusted, automatic adjustment of the optical path is realized, the device can adapt to to-be-measured substances with different concentrations by adjusting the optical path, and the device is beneficial to widening the measurement range, enhancing the applicability and improving the measurement precision.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, and in particular to an optical path cell device with adjustable optical path. Background Art

[0002] Tunable semiconductor laser absorption spectroscopy is an infrared absorption spectroscopy analysis technology that uses the principle of molecular "frequency-selective" absorption to form an absorption spectrum to achieve high-resolution molecular concentration quantitative analysis technology. Tunable semiconductor laser absorption spectroscopy can perform in-situ non-contact measurements, and has the characteristics of high precision and high selectivity. Combined with noise suppression technologies such as wavelength modulation spectroscopy and phase-locked amplification, it can achieve ppm or even ppb levels of trace gas molecule concentration measurement. The optical path of the existing optical path cell device cannot be adjusted, resulting in limited adaptability of the device to different concentrations of the test substance. For high-concentration substances, due to the fixed optical path, the absorbance will be too strong, exceeding the detection limit of the device, causing the signal to be saturated and unable to accurately measure the concentration. For low-concentration substances, because the optical path is not long enough and the absorbance is too weak, the device cannot accurately distinguish, reducing the sensitivity of the detection. One device cannot meet the compatibility test under high and low ranges at the same time, so different structures need to be designed for devices with different ranges, which increases the cost of the equipment. Summary of the invention

[0003] The object of the present invention is to provide an optical path cell device with adjustable optical path to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an optical path pool device with adjustable optical path, comprising a shell, an air chamber is arranged in the shell, one side of the air chamber is conductively connected to a first accommodating groove, a first plano-concave mirror is rotatably connected in the first accommodating groove, an exit hole is provided on the first plano-concave mirror, a mounting seat is fixedly connected to the first plano-concave mirror, a through hole is provided on the mounting seat at a position corresponding to the exit hole, a photoelectric detector is fixedly connected to the through hole, the other side of the air chamber is conductively connected to a second accommodating groove, a second plano-concave mirror is fixedly connected in the second accommodating groove, an entrance hole is provided on the second plano-concave mirror, and a laser generator is fixedly connected to the entrance hole.

[0005] Preferably, two mounting holes are provided in the air chamber, and air pipe joints are threadedly connected in the mounting holes.

[0006] Preferably, a second end cover is provided on one side of the second plano-concave mirror, and the second end cover is fixedly connected in the housing.

[0007] Preferably, a bearing is fixedly connected to the mounting seat, and the bearing is fixedly connected to the housing.

[0008] Preferably, a first end cover is provided on one side of the bearing, and the first end cover is fixedly connected to the housing.

[0009] Preferably, a motor is fixedly connected to the first end cover, and a second gear is fixedly connected to the output end of the motor.

[0010] Preferably, the second gear is meshingly connected with the first gear, a connecting rod is fixedly connected to the first gear, and the connecting rod is mounted on the mounting seat.

[0011] Preferably, a fixing sleeve is inserted into the other end of the connecting rod, and the fixing sleeve is fixedly connected to the mounting seat.

[0012] The optical path cell device with adjustable optical path provided by the present invention has the advantages that: the present invention drives the first plano-concave mirror to rotate by a motor, thereby adjusting the position of the exit hole, thereby realizing automatic adjustment of the optical path. By adjusting the optical path, the device can adapt to different concentrations of substances to be tested, which is conducive to broadening the measurement range, enhancing applicability and improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional cutaway structure of the present invention;

[0015] Figure 2 for Figure 1 A magnified view of the structure in the middle A area;

[0016] Figure 3 It is a schematic diagram of the three-dimensional cutaway structure of the shell of the present invention.

[0017] In the figure: 1. Shell; 11. Air chamber; 12. Mounting hole; 13. First accommodating groove; 14. Second accommodating groove; 15. Air pipe joint; 16. First end cover; 17. Second end cover; 2. First plano-concave mirror; 21. Exit hole; 22. Mounting seat; 23. Through hole; 24. Photoelectric detector; 25. Bearing; 26. Fixed sleeve; 27. Connecting rod; 28. First gear; 29. ​​Motor; 210. Second gear; 3. Second plano-concave mirror; 31. Entrance hole; 32. Laser generator. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Please see attached Figure 1 -Attached Figure 3 The present invention provides an embodiment: an optical path pool device with adjustable optical path, comprising a shell 1, an air chamber 11 is arranged in the shell 1, one side of the air chamber 11 is conductively connected to a first receiving groove 13, a first plano-concave mirror 2 is rotatably connected in the first receiving groove 13, an emission hole 21 is provided on the first plano-concave mirror 2, a mounting seat 22 is fixedly connected to the first plano-concave mirror 2, a through hole 23 is provided on the mounting seat 22 at a position corresponding to the emission hole 21, a photoelectric detector 24 is fixedly connected to the through hole 23, the other side of the air chamber 11 is conductively connected to a second receiving groove 14, the second receiving groove 1 4 is fixedly connected with a second plano-concave mirror 3, an incident hole 31 is provided on the second plano-concave mirror 3, a laser generator 32 is fixedly connected to the incident hole 31, the air chamber 11 is used to accommodate the object to be measured, the first accommodating groove 13 is used to accommodate the first plano-concave mirror 2, the exit hole 21, the mounting seat 22 and the through hole 23 are used to pass light, the mounting seat 22 is used to install the first plano-concave mirror 2, the photoelectric detector 24 is used to convert the optical signal into an electrical signal, and the laser generator 32 is used to generate laser; two mounting holes 12 are provided in the air chamber 11, the mounting hole 12 is threadedly connected with a trachea joint 15, and the mounting hole 1 2 is used to install the trachea connector 15, and the trachea connector 15 is used to install the trachea; a second end cover 17 is provided on one side of the second plano-concave mirror 3, and the second end cover 17 is fixedly connected to the shell 1, and the second end cover 17 is used to support and fix the second plano-concave mirror 3; a bearing 25 is fixedly connected to the mounting seat 22, and the bearing 25 is fixedly connected to the shell 1, and the bearing 25 is used to assist the mounting seat 22 to rotate; a first end cover 16 is provided on one side of the bearing 25, and the first end cover 16 is fixedly connected to the shell 1, and the first end cover 16 is used to support and fix the bearing 25; a first end cover 16 is fixedly connected to the There is a motor 29, and the output end of the motor 29 is fixedly connected to a second gear 210, and the motor 29 is used to drive the second gear 210; the second gear 210 is meshingly connected to the first gear 28, and the first gear 28 is fixedly connected to a connecting rod 27, and the connecting rod 27 is installed on the mounting seat 22, the second gear 210 drives the connecting rod 27 through the first gear 28, and the connecting rod 27 drives the mounting seat 22; the other end of the connecting rod 27 is plugged with a fixing sleeve 26, and the fixing sleeve 26 is fixedly connected to the mounting seat 22, the connecting rod 27 drives the mounting seat 22 through the fixing sleeve 26, and the disassembly and assembly of the connecting rod 27 is convenient.

[0020] Working principle: When the present invention is used, laser is generated by laser generator 32, enters into air chamber 11 through incident hole 31 on second plano-concave mirror 3, and then irradiates onto first plano-concave mirror 2. After multiple reflections, laser is emitted from exit hole 21, and irradiates onto photodetector 24 through through hole 23. Photodetector 24 converts optical signal into electrical signal. Second gear 210 is driven by motor 29 on first end cover 16. Second gear 210 drives connecting rod 27 through first gear 28. Connecting rod 27 drives mounting seat 22 through fixing sleeve 26. Mounting seat 22 rotates on bearing 25, and first plano-concave mirror 2 on mounting seat 22 rotates accordingly, so as to adjust exit. The position of the hole 21 is adjusted to adjust the optical path, and the optical paths corresponding to the first plano-concave mirror 2 rotating at different angles are simulated and tested respectively, and the calibration results are recorded on the host computer. When the concentration of the object to be tested changes, the host computer will automatically adapt to the optimal optical path, and the real-time test results can be output after optical path compensation; wherein, the air chamber 11 of the shell 1 is used to accommodate the object to be tested, the mounting hole 12 is used to install the air pipe joint 15, the air pipe joint 15 is used to install the air pipe, the first accommodating groove 13 is used to accommodate the first plano-concave mirror 2, the second accommodating groove 14 is used to accommodate the second plano-concave mirror 3, the second end cover 17 is used to support and fix the second plano-concave mirror 3, and the first end cover 16 is used to support and fix the bearing 25.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0023] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical path cell device with adjustable optical path, comprising a housing (1), characterized in that: The housing (1) is provided with an air chamber (11), one side of the air chamber (11) is conductively connected to a first receiving groove (13), a first plano-concave mirror (2) is rotatably connected in the first receiving groove (13), an emission hole (21) is provided on the first plano-concave mirror (2), a mounting seat (22) is fixedly connected to the first plano-concave mirror (2), a through hole (23) is provided on the mounting seat (22) at a position corresponding to the emission hole (21), a photoelectric detector (24) is fixedly connected to the through hole (23), the other side of the air chamber (11) is conductively connected to a second receiving groove (14), a second plano-concave mirror (3) is fixedly connected in the second receiving groove (14), an incident hole (31) is provided on the second plano-concave mirror (3), a laser generator (32) is fixedly connected to the incident hole (31).

2. The optical path cell device with adjustable optical path according to claim 1, characterized in that: Two mounting holes (12) are provided in the air chamber (11), and air pipe joints (15) are threadedly connected to the mounting holes (12).

3. The optical path cell device with adjustable optical path according to claim 1, characterized in that: A second end cover (17) is provided on one side of the second plano-concave mirror (3), and the second end cover (17) is fixedly connected inside the housing (1).

4. The optical path cell device with adjustable optical path according to claim 1, characterized in that: A bearing (25) is fixedly connected to the mounting seat (22), and the bearing (25) is fixedly connected inside the housing (1).

5. The optical path cell device with adjustable optical path according to claim 4, characterized in that: A first end cover (16) is provided on one side of the bearing (25), and the first end cover (16) is fixedly connected inside the housing (1).

6. The optical path cell device with adjustable optical path according to claim 5, characterized in that: A motor (29) is fixedly connected to the first end cover (16), and a second gear (210) is fixedly connected to the output end of the motor (29).

7. The optical path cell device with adjustable optical path according to claim 6, characterized in that: The second gear (210) is meshingly connected with the first gear (28), the first gear (28) is fixedly connected with a connecting rod (27), and the connecting rod (27) is mounted on the mounting seat (22).

8. The optical path cell device with adjustable optical path according to claim 7, characterized in that: A fixing sleeve (26) is inserted into the other end of the connecting rod (27), and the fixing sleeve (26) is fixedly connected to the mounting seat (22).

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