Light path system and high-temperature flue detection gun

Abstract

The utility model discloses a light path system and a high-temperature flue probe gun, the light path system comprises a laser transmit-receive module, a light beam shaping module and a total reflection module, and the laser transmit-receive module, the light beam shaping module and the total reflection module are coaxially arranged along the central axis of the high-temperature flue probe gun. According to the light path system, the light beam shaping module is arranged in the light path system to shape a point light source into a line light source, the light beam coverage area is increased, the total reflection module is combined, the tolerance range of signal transmitting and receiving is expanded, the environmental adaptability is enhanced, and meanwhile the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-temperature flue gas detection, and in particular to an optical path system and a high-temperature flue gas detection gun. Background Art

[0002] A high-temperature flue gas probe is a device used to detect high-temperature flue gas. Most currently available high-temperature flue gas probes utilize an optical system design that combines a laser infrared fiber collimator with a plane reflector to achieve in-situ laser measurement of high-temperature flue gas. After laser emission, this optical system adjusts the positions of the light source, detector, and plane mirror so that the reflected laser strikes the center of the detector. This captures the optical signal containing the target gas concentration information, enabling accurate measurement of the target gas concentration in the high-temperature flue gas.

[0003] However, since the emission and reception of the light source in the optical path system of the above-mentioned high-temperature flue probe are both point-shaped, and the probe structure is easily affected by factors such as mechanical deformation, vibration, and high-temperature thermal deformation, it may cause the transmitted light spot to shift during the laser signal emission and reception process. This makes the debugging and maintenance workload during use large, and signal attenuation or loss is likely to occur when the measurement environment changes, thereby affecting the accuracy and stability of the measurement. Utility Model Content

[0004] The present application provides an optical path system and a high-temperature flue probe gun to improve the accuracy and stability of the high-temperature flue probe gun measurement.

[0005] In a first aspect, an embodiment of the present invention provides an optical path system, including: an optical path system applied to a high-temperature flue probe gun, characterized in that it includes:

[0006] A laser transceiver module, a beam shaping module and a total reflection module, wherein the laser transceiver module, the beam shaping module and the total reflection module are coaxially arranged along the central axis of the high-temperature flue probe gun;

[0007] The laser transceiver module includes a laser emission module and a photoelectric detection module, and the laser emission module and the photoelectric detection module are arranged in parallel with the central axis as the symmetry axis;

[0008] The laser emission module is used to emit a point light source laser beam;

[0009] The beam shaping module is used to shape the point light source laser beam into a line light source laser beam;

[0010] The total reflection module is used to perform total reflection on the line light source laser beam to obtain a total reflection laser beam, wherein the total reflection laser beam is parallel to the line light source laser beam;

[0011] The beam shaping module is further configured to receive the totally reflected laser beam and converge the totally reflected laser beam to obtain a converged laser beam;

[0012] The photoelectric detection module is used to receive the converged laser beam and convert it into a corresponding electrical signal.

[0013] In the second aspect, an embodiment of the utility model further provides a high-temperature flue probe gun, comprising: the optical path system described in the first aspect; a signal processing module for receiving the electrical signal generated by the optical path system and processing the electrical signal to obtain the target gas concentration value.

[0014] The embodiment of the present invention shapes a point light source into a line light source by arranging a beam shaping module in the optical path system, and combines it with a total reflection module to ensure precise control and efficient reflection of light, thereby reducing signal loss and error, improving measurement accuracy, and enhancing the reliability of measurement results; in addition, since the beam coverage area is increased, the tolerance range of signal transmission and reception is expanded, thereby improving the robustness of the system and enhancing environmental adaptability, so that the optical path has strong resistance to external interference such as mechanical deformation, vibration, and high-temperature thermal deformation, ensuring that the probe can still work stably in complex environments; in addition, the optical path design of the embodiment of the present invention greatly simplifies the debugging and installation process. Since the width and angle of the light are precisely controlled, technicians can more easily adjust and align the system, reducing the time and cost of installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of an optical path system provided in Example 1 of the present utility model;

[0016] Figure 2 This is an example diagram of a light path of an optical path system provided in the first embodiment of the present utility model;

[0017] Figure 3 This is a structural diagram of an optical path system provided in Example 2 of the present utility model;

[0018] Figure 4 This is a structural diagram of a high-temperature flue probe gun provided in Example 3 of the present utility model. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. Furthermore, the embodiments and features of the embodiments of the present invention may be combined with one another unless there is a conflict. It should also be noted that, for ease of description, the drawings only illustrate portions relevant to the present invention, not all of its components.

[0020] Example 1

[0021] Figure 1 This is a structural schematic diagram of an optical path system provided in Example 1 of the utility model. This embodiment can be applied to the situation where a point light source is shaped into a line light source in the optical path system of a high-temperature flue probe gun and the principle of total reflection is combined to expand the tolerance range of signal transmission and reception and enhance environmental adaptability. The device can be implemented by software and / or hardware and can be integrated into a high-temperature flue probe gun.

[0022] like Figure 1 As shown, the optical path system provided in this embodiment includes: a laser transceiver module 101, a beam shaping module 102 and a total reflection module 103, and the laser transceiver module 101, the beam shaping module 102 and the total reflection module 103 are coaxially arranged along the central axis of the high-temperature flue probe;

[0023] The laser transceiver module 101 includes a laser emitting module 104 and a photoelectric detection module 105, which are arranged in parallel with the central axis as a symmetric axis;

[0024] Laser emitting module 104, used for emitting a point source laser beam;

[0025] The beam shaping module 102 is used to shape the point source laser beam into a line source laser beam;

[0026] The total reflection module 103 is used to perform total reflection on the linear light source laser beam to obtain a total reflection laser beam, wherein the total reflection laser beam is parallel to the linear light source laser beam;

[0027] The beam shaping module 102 is further used to receive the totally reflected laser beam and converge the totally reflected laser beam to obtain a converged laser beam;

[0028] The photoelectric detection module 105 is used to receive the converged laser beam and convert it into a corresponding electrical signal.

[0029] The laser emitting module 104 serves as the core light source of the optical system and is used to emit a point source laser beam. A point source laser beam is a laser projected onto a surface such as a wall, which presents a point-shaped light spot.

[0030] It is understandable that laser point light sources have the following characteristics:

[0031] 1) Good monochromaticity. Laser light sources have a very narrow spectrum width, and the light waves they emit have a very pure single wavelength. At the same time, the lasers have good coherence, which makes them very useful in some applications that require high precision and stability.

[0032] 2) Small divergence angle. Point laser light sources typically have a small divergence angle, meaning the laser beam emitted from the emission port maintains a small spread. This allows the laser to be transmitted in a nearly straight line.

[0033] 3) High brightness. The laser exhibits a Gaussian distribution, meaning the energy density increases towards the center of the spot. The laser's central radiation brightness is 10 to 100 times higher than that of an LED light source.

[0034] The beam shaping module 102 changes the transmission direction and refraction angle of light to shape the original shape of the presented light spot.

[0035] A line light source laser beam refers to a laser projected onto a plane such as a wall, presenting a linear light spot.

[0036] In one embodiment, by adjusting the focal length position of the point light source and optimizing the line width of the line light source, a small-angle narrow-band line light source is formed to ensure that the line light source laser beam can be incident in parallel into the probe gun pipe.

[0037] Optionally, the distance between the laser transceiver module 101 and the beam shaping module 102 is adjustable so that the line light source laser beam is a laser beam with a target line width and a target angle.

[0038] In one embodiment, the shaped line laser beam is a small-angle narrow-band line laser beam.

[0039] Optionally, the beam shaping module 102 may use a single lens or a lens group. The single lens may use a cylindrical lens. The lens group may use a lens group of an aspheric lens and a Powell prism, or a lens group of an aspheric cylindrical lens and a free-form lens.

[0040] Optionally, the beam shaping module 102 uses a plano-convex cylindrical mirror.

[0041] Optionally, the distance between the beam shaping module 102 and the total reflection module 103 is adjustable and can make the line light source laser beam evenly cover the total reflection module 103, that is, by adjusting the distance between the beam shaping module 102 and the total reflection module 103, the line light source laser beam can evenly cover the total reflection module 103.

[0042] The total reflection module 103 is an optical element that utilizes the total reflection phenomenon of light under specific conditions. According to the application requirements of the angle of incident light and the angle of reflected light, the total reflection module 103 can be a total reflection prism, a total reflection lens, or a corner cube prism.

[0043] Optionally, the total reflection module 103 uses a corner cube prism.

[0044] It is understood that a corner cube can completely reflect incident light back to its original direction. During the measurement process, even if the tilt of the corner cube is slightly changed, the tilt of the returning light will not change. Therefore, it can be used as an excellent total reflection element.

[0045] In one embodiment, the distance between the plano-convex cylindrical mirror and the corner cube prism can be adjusted so that the line light source laser beam evenly covers the inner wall of the corner cube prism.

[0046] It can be understood that, based on the reversibility of the optical path, the light beam reflected back from the corner cube prism can be converged to the laser transceiver module 101 through the beam shaping module 102; and by arranging the laser emission module 104 and the photoelectric detection module 105 in parallel with the central axis as the axis of symmetry, the photoelectric detection module 105 can well receive the light beam converged back by the beam shaping module 102, thereby realizing a complete optical detection circuit.

[0047] It should be noted that Figure 1 The connection relationship between the modules is schematically given, and the actual light path propagation angle is not limited.

[0048] For example, Figure 2 The optical path diagram of the optical system is given. The debugging and installation steps of the optical path system are as follows:

[0049] 1) Debugging of laser point light source 1 and photoelectric detector 2: Debug the laser point light source 1 and photoelectric detector 2 and set them side by side with the central axis of the high-temperature flue probe as the axis of symmetry to ensure that the light can be accurately received by the photoelectric detector;

[0050] 2) Selection and adjustment of cylindrical lens 3: Select a suitable cylindrical lens 3 and adjust its position and angle to shape the point laser light source into a narrow-band line light source, covering the inner wall of the high-temperature flue probe gun;

[0051] 3) Optimization of focal length: By adjusting the distance between the laser point light source 1 and the cylindrical lens 3, the line width of the line light source is optimized to obtain a small-angle narrow-band line light source, ensuring that the line light source laser beam can be incident in parallel on the measuring pipe of the high-temperature flue probe gun.

[0052] 4) Setting of corner cube prism 4: A corner cube prism 4 with a suitable angle is set in the measuring pipe of the high-temperature flue probe gun so that the incident light can be totally reflected on three right-angled surfaces and the optical path measurement signal returns along the original path.

[0053] 5) Installation of photodetector 2: Install the photodetector 2 in a position parallel to the laser end of the laser point light source 1 to ensure that the returned light beam can be accurately received.

[0054] The embodiment of the present invention shapes a point light source into a line light source by arranging a beam shaping module in the optical path system, and combines it with a total reflection module to ensure precise control and efficient reflection of light, thereby reducing signal loss and error, improving measurement accuracy, and enhancing the reliability of measurement results; in addition, since the beam coverage area is increased, the tolerance range of signal transmission and reception is expanded, thereby improving the robustness of the system and enhancing environmental adaptability, so that the optical path has strong resistance to external interference such as mechanical deformation, vibration, and high-temperature thermal deformation, ensuring that the probe can still work stably in complex environments; in addition, the optical path design of the embodiment of the present invention greatly simplifies the debugging and installation process. Since the width and angle of the light are precisely controlled, technicians can more easily adjust and align the system, reducing the time and cost of installation and maintenance.

[0055] Example 2

[0056] Figure 3 This is a schematic diagram of the structure of an optical path system provided by Example 2 of the present invention. This example further optimizes Example 1. This example is optimized and added with an adjustment mechanism for fine-tuning the positions of the laser transceiver module, the beam shaping module, and the total reflection module on the central axis.

[0057] Furthermore, this embodiment is optimized and added with: a fixed bracket, which is respectively connected to the laser emission module, the beam shaping module, the total reflection module and the photoelectric detection module through the adjustment mechanism, and is used as a mounting platform for each component.

[0058] like Figure 3 As shown, the optical path system provided in this embodiment includes: a laser transceiver module 201, a beam shaping module 202, a total reflection module 203, an adjustment mechanism 204 and a fixing mechanism 205. The laser transceiver module 201 includes a laser emission module 206 and a photoelectric detection module 207.

[0059] The adjustment mechanism 204 is used to fine-tune the positions of the laser transceiver module 201 , the beam shaping module 202 , and the total reflection module 203 on the central axis.

[0060] Optionally, the adjustment mechanism 205 is used to fine-tune the positions of the laser transceiver module 201 , the beam shaping module 202 , and the total reflection module 203 on the central axis manually or electrically.

[0061] The fixing mechanism 205 is connected to the laser transceiver module 201 , the beam shaping module 202 , and the total reflection module 203 respectively through the adjustment mechanism 204 , and is used as a mounting platform for each component.

[0062] Optionally, the fixing mechanism 205 is a fixing bracket.

[0063] In one embodiment, the steps for assembling the optical system are as follows:

[0064] 1) Prepare the required components: including laser emitter, cylindrical lens, corner cube prism, photodetector, and corresponding fixing brackets and adjustment mechanisms;

[0065] 2) Install the laser transmitter: Install the laser transmitter on a fixed bracket and ensure that its emission direction is aligned with the incident surface of the cylindrical lens;

[0066] 3) Install the cylindrical lens: Place the cylindrical lens in front of the laser emitter and fine-tune the position of the cylindrical lens through the adjustment mechanism so that the laser beam can accurately enter the cylindrical lens;

[0067] 4) Install the corner cube: Place the corner cube in front of the cylindrical lens and fine-tune its relative position with the cylindrical lens through the adjustment mechanism to ensure that the line light source can evenly cover the inner wall of the corner cube;

[0068] 5) Install the photodetector: Place the photodetector on the side close to the laser emitter and fine-tune the position of the photodetector through the adjustment mechanism to ensure that it can receive the light beam reflected from the corner cube prism.

[0069] In one embodiment, the debugging steps of the optical path system are as follows:

[0070] 1. Initial alignment: First, manually adjust the approximate positions of the laser emitter, cylindrical lens, and corner cube prism so that the laser can be shaped by the cylindrical lens and incident on the inner wall of the corner cube prism.

[0071] 2. Fine-tuning alignment: Use the adjustment mechanism to fine-tune the laser emitter and cylindrical lens to ensure that the laser beam can be accurately shaped into a line light source and can evenly cover the inner wall of the corner cube prism.

[0072] 3. Detector Alignment: Adjust the position of the photodetector to ensure it receives the light beam reflected from the corner cube. Use a signal detection instrument to measure the signal strength received by the detector to assess the accuracy of the alignment.

[0073] 4. System Test: After alignment is complete, perform a system test to check the stability of the optical system and signal quality. Adjust any problems found until the system reaches the expected performance indicators.

[0074] It should be noted that Figure 3 The connection relationship between the modules is schematically given, and the actual light path propagation angle is not limited.

[0075] By adding an adjustment mechanism, the embodiment of the present utility model can detect the signal strength received by the detector according to the signal detection instrument to evaluate the accuracy of the alignment, thereby adjusting the line width and angle of the line light source laser beam to ensure that the line light source laser beam can be incident in parallel and the coverage area of ​​the beam on the total reflection module is increased as much as possible, thereby expanding the tolerance range of measurement signal transmission and reception, improving the robustness of the system, and enhancing the accuracy and stability of the measurement results.

[0076] Example 3

[0077] Figure 4 This is a structural schematic diagram of a high-temperature flue probe gun provided in Example 3 of the present utility model. This embodiment can be applied to the situation where a point light source is shaped into a line light source in the optical path system of a high-temperature flue probe gun and combined with the principle of total reflection to expand the tolerance range of signal transmission and reception and enhance environmental adaptability. The device can be implemented by software and / or hardware.

[0078] like Figure 4 As shown, the high-temperature flue probe gun specifically includes:

[0079] The optical system 301 described in any of the above embodiments;

[0080] The signal processing module 302 is used to receive the electrical signal generated by the optical system and process the electrical signal to obtain the target gas concentration value.

[0081] Furthermore, based on the above embodiment, the high temperature flue probe gun further includes:

[0082] The communication module is used to send the target gas concentration value to a remote monitoring system.

[0083] Optionally, the remote control system can be a data processing and analysis terminal used on-site with the high-temperature flue probe, or it can be a remote monitoring platform.

[0084] The high-temperature flue probe gun provided by the embodiment of the present utility model has the corresponding functional modules and beneficial effects of the optical path system provided by any embodiment of the present utility model.

[0085] It is worth noting that in the embodiments of the above-mentioned optical path system and high-temperature flue probe, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present utility model.

[0086] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An optical path system, applied to a high-temperature flue probe, characterized in that: include: A laser transceiver module, a beam shaping module and a total reflection module, wherein the laser transceiver module, the beam shaping module and the total reflection module are coaxially arranged along the central axis of the high-temperature flue probe gun; The laser transceiver module includes a laser emission module and a photoelectric detection module, and the laser emission module and the photoelectric detection module are arranged in parallel with the central axis as the symmetry axis; The laser emission module is used to emit a point light source laser beam; The beam shaping module is used to shape the point light source laser beam into a line light source laser beam; The total reflection module is used to perform total reflection on the line light source laser beam to obtain a total reflection laser beam, wherein the total reflection laser beam is parallel to the line light source laser beam; The beam shaping module is further configured to receive the totally reflected laser beam and converge the totally reflected laser beam to obtain a converged laser beam; The photoelectric detection module is used to receive the converged laser beam and convert it into a corresponding electrical signal.

2. The optical path system according to claim 1, characterized in that: The beam shaping module is a plano-convex cylindrical mirror.

3. The optical path system according to claim 1, characterized in that: The total reflection module is a corner cube prism.

4. The optical path system according to claim 1, characterized in that: The distance between the laser transceiver module and the beam shaping module is adjustable so that the line light source laser beam has a target line width and a target angle.

5. The optical path system according to claim 1, characterized in that: The distance between the beam shaping module and the total reflection module is adjustable so that the linear light source laser beam can evenly cover the total reflection module.

6. The optical path system according to claim 1, characterized in that: Also includes: The adjustment mechanism is used to fine-tune the positions of the laser transceiver module, the beam shaping module and the total reflection module on the central axis.

7. The optical path system according to claim 6, characterized in that: The adjustment mechanism fine-tunes the positions of the laser transceiver module, the beam shaping module and the total reflection module on the central axis manually or electrically.

8. The optical path system according to claim 6, characterized in that: Also includes: The fixing mechanism is connected to the laser transceiver module, the beam shaping module and the total reflection module respectively through the adjusting mechanism, and is used as a mounting platform for each component.

9. A high-temperature flue probe gun, characterized in that: include: The optical system according to any one of claims 1 to 8; The signal processing module is used to receive the electrical signal generated by the optical path system and process the electrical signal to obtain the target gas concentration value.

10. The high-temperature flue probe gun according to claim 9, characterized in that: Also includes: The communication module is used to send the target gas concentration value to a remote monitoring system.

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