Optical fiber remote laser gas telemeter

Abstract

The utility model relates to gas detection technical field, and disclose a kind of optical fiber remote transmission laser gas telemeter, including telemeter body, collimator, the laser and spectrum receiving analysis module are included in the telemeter body, optical fiber is installed between the laser and collimator, the laser output laser reaches collimator by optical fiber, and the back transmission laser of collimator is reached spectrum receiving analysis module by the gas to be measured. The utility model is provided with optical fiber as auxiliary channel, so that the laser exported by the laser output end in telemeter body can almost reach collimator installed in opposite end without damage and be transmitted back to the laser receiving end in telemeter body by collimator, thereby meeting the detection requirement while reducing light loss rate, improving precision, and compared with prior art, the power equipment still maintains the state of only telemeter body, without additional design of explosion-proof structure, effectively control the use cost.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically to a fiber optic remote transmission laser gas telemetry instrument. Background Technology

[0002] As a detection device for specific gases in the environment, the laser gas telemetry instrument works by rapidly modulating the laser frequency to sweep across a fixed frequency range of the absorption spectrum of the gas being measured. Then, phase-sensitive detection technology is used to measure the harmonic components in the transmission spectrum after absorption by the gas to analyze the gas absorption. Finally, the gas concentration is measured by measuring the attenuation of the laser by the gas. It has the advantages of high precision and long-distance measurement.

[0003] However, with the further development of laser gas telemetry, there are two existing configurations. The first is where one end emits a laser and the other end receives and processes it. In the process of light being emitted from the laser and reflected back to the laser receiver by a pyramid or other type of optical reflector, the light loss rate is relatively high, which has a significant impact on the accuracy of the detection results. The second is where the detection method involves one end emitting the laser and the other end receiving it. In practical applications, both ends need to be powered and have corresponding explosion-proof designs, resulting in higher operating costs and greater difficulty in practical application. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a fiber optic remote transmission laser gas telemetry instrument, which solves the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a fiber optic remote transmission laser gas telemetry instrument, including a telemetry instrument body and a collimator. The telemetry instrument body includes a laser and a spectrum receiving and analysis module. An optical fiber is installed between the laser and the collimator. The laser output by the laser reaches the collimator through the optical fiber, and the return laser emitted by the collimator reaches the spectrum receiving and analysis module through the gas to be measured.

[0006] The telemetry instrument body is mounted on the top of a tripod, the collimator is mounted on the top of another tripod, and both tripods are equipped with a lifting platform on their tops. The top of one lifting platform is connected to the bottom of the telemetry instrument body, and an adjustment platform is provided between the top of the other lifting platform and the bottom of the collimator.

[0007] Preferably, the lifting platform includes a T-shaped screw and a second platform body. A screw hole is provided in the top of the triangular bracket. One end of the T-shaped screw is threaded to the screw hole and extends through to the outer side of the top of the triangular bracket. The end of the T-shaped screw is engaged with the bottom structure of the second platform body. The top of the second platform body is connected to the bottom of the telemetry instrument body or the bottom of the adjustment platform. Several through-holes are provided in the outer ring structure of the second platform body. A guide rod fixed on the top of the triangular bracket is engaged in the positioning holes.

[0008] Preferably, a steering wheel is fixed to the other end of the T-shaped screw, and there is clearance space between the steering wheel and the top structure of the triangular bracket.

[0009] Preferably, the adjustment platform includes a first platform body, a first frame plate, and a second frame plate. The top of the first platform body is fixed to the bottom of the collimator. The bottom of the first platform body is engaged with a first slide rail fixed on the inner wall of the bottom of the first frame plate. The first platform body, supported by the first slide rail, can drive the collimator to move back and forth inside the first frame plate. The two side walls of the first frame plate are provided with first sliding grooves. The first screws fixed on the surface of the first platform body are engaged inside the first sliding grooves. One end of the first screw is externally threaded with a first screw sleeve. The two screws in relative positions can clamp and limit the first platform body under the meshing support of their respective first screws.

[0010] Preferably, the bottom of the first frame plate is engaged with a second slide rail fixed on the inner wall of the bottom of the second frame plate, and the first frame plate, supported by the second slide rail, can move left and right inside the second frame plate, driving the first platform body and the collimator. The front and rear ends of the second frame plate are provided with second slide grooves, and the interior of the second slide grooves is engaged with a second screw fixed on the surface of the first frame plate. One end of the second screw is externally threaded with a second screw sleeve, and the two second screw sleeves in opposite positions can clamp and limit the first frame plate.

[0011] Preferably, a support frame is installed between the bottom of the second frame plate and the top of the corresponding second platform body, and the bottom of the support frame and the top of the second platform body can be detachably installed by screws.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model uses an optical fiber as an auxiliary channel to enable the laser output from the laser inside the telemetry instrument to reach the collimator with almost no loss, and then be transmitted back to the spectral receiving and analysis module inside the telemetry instrument by the collimator installed at the other end. This reduces the light loss rate and improves accuracy while meeting the detection requirements. At the same time, this invention only requires one end to be connected to power and is designed with an explosion-proof structure, thereby effectively controlling the cost of use.

[0014] 2. This utility model uses two lifting platforms as lifting conditions. When in use, supported by two triangular brackets, the two lifting platforms can respectively drive the spectral receiving and analysis module and collimator in the telemetry instrument body to flexibly adjust the height in a uniform manner, thereby shortening the initial adjustment time of the overall device and improving the work efficiency.

[0015] 3. This utility model uses an adjustment platform as a condition for fine-tuning displacement. In use, the adjustment platform, supported by the lifting platform, can provide short-distance adjustment of the collimator's forward and backward or left and right displacement, thereby improving the alignment effect between the collimator and the spectral receiving and analysis module in the telemetry instrument body, and further optimizing the overall device's performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front view schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the structural lifting platform of this utility model;

[0020] Figure 5 This is an enlarged schematic diagram of the structural adjustment platform of this utility model.

[0021] In the diagram: 1. Triangular support; 2. Telemetry instrument body; 3. Collimator; 4. Fiber optic cable; 5. Adjustment platform; 51. First platform body; 52. First frame plate; 53. Second frame plate; 54. First slide groove; 55. First screw; 56. First screw sleeve; 57. Second slide groove; 58. Second screw; 59. Second screw sleeve; 6. Lifting platform; 61. T-screw; 62. Second platform body; 63. Guide rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 and Figure 3 A fiber optic remote transmission laser gas telemetry instrument includes a telemetry instrument body 2 and a collimator 3. The telemetry instrument body 2 includes a laser and a spectrum receiving and analysis module. An optical fiber 4 is installed between the laser and the collimator 3. The laser output from the laser reaches the collimator 3 through the optical fiber 4. The return laser emitted from the collimator 3 reaches the spectrum receiving and analysis module through the gas to be measured. That is, the non-detection optical path between the telemetry instrument body 2 and the collimator 3 uses optical fiber transmission.

[0024] In use, the telemetry instrument body 2, collimator 3, and optical fiber 4 are placed in the environment to be tested. Then, the telemetry instrument body 2 is turned on. The laser output from the laser inside the telemetry instrument body 2 is transmitted through the optical fiber 4 and enters the collimator 3 almost without loss. The collimator 3 then guides the laser through the gas to be tested to the spectral receiving and analysis module inside the telemetry instrument body 2. Finally, the spectral receiving and analysis module determines the gas concentration by measuring the attenuation of the laser by the gas, thus meeting the detection requirements while achieving a single-line transmission effect with low light loss rate.

[0025] Please see Figure 1 and Figure 5The telemetry instrument body 2 is mounted on the top of the tripod 1, and the collimator 3 is mounted on the top of another tripod 1. Both tripods 1 have a lifting platform 6 on their tops. The top of one lifting platform 6 is connected to the bottom of the telemetry instrument body 2, and an adjustment platform 5 is provided between the top of the other lifting platform 6 and the bottom of the collimator 3. The lifting platform 6 includes a T-screw 61 and a second platform body 62. A screw hole is opened in the top of the tripod 1. One end of the T-screw 61 is threaded into the screw hole and extends through to the outside of the top of the tripod 1. The end of the T-screw 61 is engaged with the bottom structure of the second platform body 62. The top of the second platform body 62 is connected to the bottom of the telemetry instrument body 2 or the bottom of the adjustment platform 5. Several through-holes are provided in the outer ring structure of the second platform body 62. A guide rod 63 fixed on the top of the triangular bracket 1 is engaged in the positioning holes. By utilizing the limiting effect of the guide rod 63 and the positioning holes, the spiral engagement and lifting of the T-shaped screw 61 and the triangular bracket 1 is transformed into the linear lifting effect of the second platform body 62 and related structures. A steering wheel is fixed to the other end of the T-shaped screw 61 to facilitate subsequent turning and force application. There is clearance space between the steering wheel and the top structure of the triangular bracket 1 to avoid structural interference.

[0026] The adjustment platform 5 includes a first platform body 51, a first frame plate 52, and a second frame plate 53. The top of the first platform body 51 is fixed to the bottom of the collimator 3. The bottom of the first platform body 51 is engaged with a first slide rail fixed on the inner wall of the bottom of the first frame plate 52. The first platform body 51 can drive the collimator 3 to move back and forth inside the first frame plate 52 under the support of the first slide rail. The two side walls of the first frame plate 52 are provided with first slide grooves 54. The first screw 55 fixed on the surface of the first platform body 51 is engaged inside the first slide groove 54. One end of the first screw 55 is externally threaded to a first screw sleeve 56. The two screws in relative positions can clamp and limit the first platform body 51 under the meshing support of their respective first screws 55.

[0027] The bottom of the first frame plate 52 is engaged with a second slide rail fixed to the inner wall of the bottom of the second frame plate 53. With the support of the second slide rail, the first frame plate 52 can move left and right inside the second frame plate 53, driving the first platform body 51 and the collimator 3. The front and rear ends of the second frame plate 53 are provided with second slide grooves 57. The interior of the second slide grooves 57 is engaged with a second screw 58 fixed to the surface of the first frame plate 52. One end of the second screw 58 is externally threaded with a second screw sleeve 59. The two second screw sleeves 59 in opposite positions can clamp and limit the first frame plate 52. A support frame is installed between the bottom of the second frame plate 53 and the top of the corresponding second platform body 62. The bottom of the support frame and the top of the second platform body 62 can be detachably installed with screws, thus providing convenient working conditions for subsequent modular maintenance and replacement.

[0028] During use, considering the alignment adjustment requirements between the telemetry instrument body 2 and the collimator 3, the two lifting platforms 6 can be used to adjust the telemetry instrument body 2 and the collimator 3 to a uniform height. The specific operation is as follows:

[0029] By rotating the T-screw 61 through the steering wheel, the T-screw 61 engages with the screw hole at the top of the triangular bracket 1 to raise and lower. At the same time, the second platform body 62 will drive the adjustment platform 5 and the collimator 3 to rise and fall synchronously under the pressure of the T-screw 61. Similarly, following the above steps, the spectral receiving and analysis module inside the telemetry instrument body 2 can be raised and lowered to the position aligned with the collimator 3.

[0030] Considering the specific positional deviation, firstly, the two first threaded sleeves 56 are turned off to temporarily move them away from the first frame plate 52. Then, the telemetry instrument body 2 is turned on. The laser output from the laser inside the telemetry instrument body 2 is transmitted through the optical fiber 4 and enters the collimator 3 almost without loss. The collimator 3 then guides the laser output towards the spectral receiving and analysis module inside the telemetry instrument body 2. At the same time, the collimator 3 is pushed to move the collimator 3 and the first platform body 51 back and forth inside the first frame plate 52 until the laser output from the collimator 3 is aligned with the spectral receiving and analysis module inside the telemetry instrument body 2. Then, the two first threaded sleeves 56 are reset and locked to clamp and limit the first platform body 51 and the collimator 3 again.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fiber optic remote-guided laser gas telemetry instrument, comprising a telemetry instrument body (2) and a collimator (3), wherein the telemetry instrument body (2) includes a laser and a spectral receiving and analysis module, characterized in that: An optical fiber (4) is installed between the laser and the collimator (3). The laser output from the laser reaches the collimator (3) via the optical fiber (4), and the return laser emitted by the collimator (3) reaches the spectral receiving and analysis module via the gas to be tested.

2. The fiber optic remote transmission laser gas telemetry instrument according to claim 1, characterized in that: The telemetry instrument body (2) is installed on the top of the tripod (1), the collimator (3) is installed on the top of another tripod (1), and both tripods (1) are provided with lifting platforms (6), the top of one of the lifting platforms (6) is connected to the bottom of the telemetry instrument body (2), and the top of the other lifting platform (6) is provided with an adjustment platform (5) between the bottom of the collimator (3).

3. The fiber optic remote transmission laser gas telemetry instrument according to claim 2, characterized in that: The lifting platform (6) includes a T-shaped screw (61) and a second platform body (62). A screw hole is provided in the top of the triangular bracket (1). One end of the T-shaped screw (61) is threaded to the screw hole and passes through to the outside of the top of the triangular bracket (1). The end of the T-shaped screw (61) is engaged with the bottom structure of the second platform body (62). The top of the second platform body (62) is connected to the bottom of the telemetry instrument body (2) or the bottom of the adjustment platform (5). Several through-holes are provided in the outer ring structure of the second platform body (62). A guide rod (63) fixed on the top of the triangular bracket (1) is engaged in the positioning hole.

4. The fiber optic remote transmission laser gas telemetry instrument according to claim 3, characterized in that: A steering wheel is fixed to the other end of the T-shaped screw (61), and there is a clearance space between the steering wheel and the top structure of the triangular bracket (1).

5. The fiber optic remote transmission laser gas telemetry instrument according to claim 2, characterized in that: The adjustment platform (5) includes a first platform body (51), a first frame plate (52), and a second frame plate (53). The top of the first platform body (51) is fixed to the bottom of the collimator (3). The bottom of the first platform body (51) is engaged with a first slide rail fixed on the inner wall of the bottom of the first frame plate (52). The first platform body (51) can drive the collimator (3) to move back and forth inside the first frame plate (52) under the support of the first slide rail. The two side walls of the first frame plate (52) are provided with first slide grooves (54). The first slide grooves (54) are engaged with a first screw (55) fixed on the surface of the first platform body (51). One end of the first screw (55) is externally threaded with a first screw sleeve (56). The two screw sleeves (56) in relative positions can clamp and limit the first platform body (51) under the meshing support of their respective first screws (55).

6. The fiber optic remote transmission laser gas telemetry instrument according to claim 5, characterized in that: The bottom of the first frame plate (52) is engaged with a second slide rail fixed on the inner wall of the bottom of the second frame plate (53). The first frame plate (52) can move left and right inside the second frame plate (53) under the support of the second slide rail. The front and rear ends of the second frame plate (53) are provided with second slide grooves (57). The inside of the second slide grooves (57) is engaged with a second screw (58) fixed on the surface of the first frame plate (52). One end of the second screw (58) is externally threaded with a second screw sleeve (59). The two second screw sleeves (59) in opposite positions can clamp and limit the first frame plate (52).

7. The fiber optic remote transmission laser gas telemetry instrument according to claim 5, characterized in that: A support frame is installed between the bottom of the second frame plate (53) and the top of the corresponding second platform body (62), and the bottom of the support frame and the top of the second platform body (62) can be detachably installed by screws.

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