Anti-interference laser gas detection system

Abstract

The invention discloses an anti-interference laser gas detection system which comprises a processing device, a laser device is connected in the processing device, an anti-interference assembly used for resisting interference is connected beside the laser device, a lock-in amplifier is connected between the laser device and the processing device, and target gas is arranged in the anti-interference assembly. And the target gas is connected with a monitor. The monitor is installed in front of the gas inlet device, then gas input by the gas inlet device is pre-detected according to cooperation of the monitor with built-in gas solubility, humidity and temperature compensation equipment, meanwhile, a detector of the gas inlet device is triggered and judged through pre-detection, and whether corresponding detection and collection are conducted on target gas of the gas inlet device or not is judged. When the gas is normal, the detector works normally, and when the gas is abnormal, a built-in monitor is used for eliminating gas concentration, temperature or humidity and the like for compensation, so that the laser gas detection effect is improved, and the interference influence of uncertain factors on laser gas detection is reduced.

Description

Technical Field

[0001] The invention relates to the field of laser gas detection equipment, in particular to an anti-interference laser gas detection system. Background Art

[0002] With the development of laser technology and spectral technology, laser gas detectors have also developed into various types, such as laser scattering spectroscopy, laser induced fluorescence spectroscopy, laser Raman spectroscopy, etc. They use the scattering, fluorescence and Raman effects of gas on laser to perform gas analysis; currently, laser gas detectors are already a mature gas analysis technology, widely used in environmental monitoring, industrial process control, medical diagnosis, safety protection and other fields.

[0003] However, the existing technology has the following shortcomings: the current laser gas detection is mainly easily affected by external factors, such as gas concentration, temperature or humidity and other uncertain factors, which may lead to incorrect judgments in the laser gas detection system. Therefore, an anti-interference laser gas detection system is urgently needed to change the status quo. Summary of the invention

[0004] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and other drawings of the description.

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an anti-interference laser gas detection system, which monitors the incoming gas at all times through the cooperation of the monitor in front of the air intake device, so that when the gas passes through, it is necessary to judge the built-in temperature, humidity, and gas concentration respectively, and perform corresponding compensation processing after the judgment to trigger the laser detection of the detector. At the same time, the monitor is used to eliminate the influence of uncertain factors such as gas concentration, temperature or humidity on laser gas detection, thereby improving the anti-interference effect of the outside world during laser gas detection.

[0006] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: an anti-interference laser gas detection system, including a processing device, wherein the processing device is connected to a laser device, an anti-interference component for anti-interference is connected to the laser device, and a phase-locked amplifier is connected between the laser device and the processing device; a target gas is arranged in the anti-interference component, a monitor is connected to the target gas, an air intake device is arranged on the monitor, and a reflector is arranged at one end of the target gas. The monitor mainly performs gas detection on the air intake device, so as to complete the corresponding control before the gas enters the target gas, and at the same time eliminates the interference problem caused by adverse factors in the gas to the gas detection.

[0007] The present invention is further improved, the monitor includes a humidity compensation device, a temperature compensation device and a gas concentration compensation device, the humidity compensation device, the temperature compensation device and the gas concentration compensation device are all connected to the target gas, the monitor is flange-connected to the air intake device, and the other end of the target gas is connected to the laser device. One end of the target gas is connected to the laser device and emitted by the laser device.

[0008] The present invention is further improved. When the humidity compensation device is in operation, it is divided into Yes and No. When Yes, it indicates that the humidity of the intake gas is normal and meets the laser gas detection standard. When the humidity compensation device is No, it indicates that the intake gas is unqualified, and the gas detection calculation is discarded. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

[0009] The present invention is further improved. When the temperature compensation device is in operation, it is divided into Yes and No. When Yes, it indicates that the humidity of the intake gas is normal and meets the laser gas detection standard. When the temperature compensation device is No, it indicates that the intake gas is unqualified, and the gas detection calculation is discarded. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

[0010] The present invention is further improved. When the gas concentration compensation device is in operation, it is divided into Yes and No. When Yes, it indicates that the humidity of the intake gas is normal and meets the laser gas detection standard. When the gas concentration compensation device is No, it indicates that the intake gas is unqualified, and the gas detection calculation is discarded. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

[0011] The present invention is further improved in that the humidity setting value of the humidity compensation device is set by the monitor of the adjustable potentiometer, the temperature setting value of the temperature compensation device is set by the monitor of the adjustable potentiometer, and the temperature setting value of the gas concentration compensation device is set by the monitor of the adjustable potentiometer.

[0012] The present invention is further improved in that a laser controller is arranged in the laser device, the laser controller is respectively connected to a detector and a laser emitting end, a lens and a glass slide are mounted on the laser emitting end, the laser emitting end cooperates with the glass slide and the detector through the lens, the laser controller cooperates with the processing device electrically, and the detector cooperates with the target gas and the reflector.

[0013] The present invention is further improved in that a processing system is arranged in the processing device, a micro control unit and a data acquisition are respectively connected to the processing system, the data acquisition is connected to the phase-locked amplifier, the data acquisition is electrically coordinated with the processing system, the micro control unit is interactively coordinated with the processing system, and the micro control unit is electrically coordinated with the laser controller.

[0014] As a further improvement to the present invention, the processing system may be an integrated display device that displays and presents information through text and images.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention installs a monitor in front of the air intake device, and then performs pre-detection of the gas input by the air intake device in cooperation with the built-in gas solubility, humidity and temperature compensation equipment. At the same time, the detector is triggered and judged through the pre-detection to determine whether to perform corresponding detection and collection on the target gas. When the gas is normal, the detector works normally, and when it is abnormal, the built-in monitor eliminates the gas concentration, temperature or humidity for compensation, thereby improving the effect of laser gas detection and reducing the interference of uncertain factors on laser gas detection.

[0018] 2. The present invention transmits data feedback from the detector to data acquisition through a phase-locked amplifier. The phase-locked amplifier can significantly suppress useless noise and improve the detection signal-to-noise ratio. At the same time, the phase-locked amplifier can filter out interference signals, suppress external interference, and maintain the accuracy of the measurement signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the principle structure flow of an anti-interference laser gas detection system of the present invention;

[0020] Figure 2 A schematic diagram of the principle structure flow of an anti-interference laser gas detection system of the present invention;

[0021] Figure 3 The present invention is a schematic diagram of an operation method of a monitor in an anti-interference laser gas detection system.

[0022] In the figure: processing device-1, laser device-2, anti-interference component-3, phase-locked amplifier-4, processing system-11, micro control unit-12, data acquisition-13, laser emission end-21, lens-22, glass slide-23, detector-24, laser controller-25, target gas-31, air intake device-32, monitor-33, reflector-34, humidity compensation device-331, temperature compensation device-332, gas concentration compensation device-333. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not used to limit the present invention.

[0024] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0027] The present invention is further described below in conjunction with the accompanying drawings:

[0028] Example 1

[0029] As attached Figure 1 To Attachment Figure 3 As shown:

[0030] The present embodiment provides an anti-interference laser gas detection system, an anti-interference laser gas detection system, comprising a processing device 1, wherein the processing device 1 is connected to a laser device 2, an anti-interference component 3 for anti-interference is connected next to the laser device 2, and a phase-locked amplifier 4 is connected between the laser device 2 and the processing device 1; wherein the processing device 1 and the laser device 2, the anti-interference component 3, and the phase-locked amplifier 4 constitute an anti-interference laser gas detection system, but when the equipment is operating, the anti-interference component 3 and the phase-locked amplifier 4 can respectively eliminate the interference caused by external factors during laser gas detection.

[0031] Among them, a processing system 11 is set in the processing device 1, and a micro control unit 12 and a data acquisition unit 13 are respectively connected to the processing system 11. The data acquisition unit 13 is connected to the phase-locked amplifier 4. The data acquisition unit 13 electrically cooperates with the processing system 11, and the micro control unit 12 interacts with the processing system 11.

[0032] Furthermore, the processing device 1 can be an integrated display device, which displays and presents through text and images, and then interacts with the data acquisition 13 and the micro control unit 12, so that the micro control unit 12 controls the laser controller to complete the triggering, thereby realizing laser gas detection and discrimination.

[0033] Among them, the laser controller 25 is respectively connected to the detector 24 and the laser emitting end 21, and the laser emitting end 21 is installed with a lens 22 and a glass slide 23. The laser emitting end 21 cooperates with the glass slide 23 and the detector 24 through the lens 22, and the laser controller 25 is electrically coordinated with the processing device 1.

[0034] Furthermore, the laser emitting end 21 installs the lens 22 and the glass slide 23 in the detector 24 , and through the triggering of the laser emitting end 21 , the detector is turned on in conjunction with the lens 22 and the glass slide 23 , thereby completing the detection feedback of the target body 31 and the radiation 34 .

[0035] The anti-interference component 3 is provided with a target gas 31 , the target gas 31 is connected with a monitor 33 , the monitor 33 is provided with an air intake device 32 , and a reflector 34 is provided at one end of the target gas 31 .

[0036] Furthermore, the target gas 31 can be carbon dioxide, nitrogen, hydrogen, methane, etc., and is not limited to other gases. However, when used, the laser emitting end and its reflector need to be adjusted and adapted accordingly.

[0037] Among them, the monitor 33 includes a humidity compensation device 331, a temperature compensation device 332 and a gas concentration compensation device 333 respectively. The humidity compensation device 331, the temperature compensation device 332 and the gas concentration compensation device 333 are all connected to the target gas 31. The monitor 33 is flange-connected to the air intake device 32, and the other end of the target gas 31 is connected to the laser device 2.

[0038] Furthermore, the monitor 33 includes compensation devices for temperature, humidity and gas concentration. Only after all three are passed can the laser emitting end 21 be triggered, thus effectively eliminating interference factors and improving the accuracy of the gas detection system.

[0039] The specific working principle is as follows:

[0040] The present invention connects the air intake device 32 to the target gas 31, installs the monitor 33 therebetween, installs the reflector 34 on one side of the target gas 31, and installs the detector 24 on the other end, and then controls the microcontroller unit 12 in cooperation with the processing system 11 in the processing device 1, thereby completing the triggering of the laser controller 25, allowing it to complete the control of the laser emitting end 21, and cooperate with the lens 22 or the glass slide 23 to complete the triggering of the detector 24, thereby detecting the target gas 31 between the reflector 34. However, when the air intake device 32 takes in air, When the detector 33 performs preprocessing, the humidity compensation device 331, the temperature compensation device 332 and the gas concentration compensation device 333 are identified according to the incoming gas. If there is an abnormality in the identification process, the gas detection calculation will be abandoned. If it is qualified, the gas detection analysis will continue to obtain the echo signal. Then, the detector 24 and the phase-locked amplifier 4 can filter out the interference signal, suppress external interference, maintain the accuracy of the measurement signal, and finally cooperate with the data acquisition 13 to summarize and input it into the processing system 11 to ensure the anti-interference performance of laser gas detection.

[0041] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0042] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0043] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present invention. However, those skilled in the relevant art will understand that the present invention can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. An anti-interference laser gas detection system, characterized in that: The invention comprises a processing device (1), wherein the processing device (1) is connected to a laser device (2), an anti-interference component (3) for anti-interference is connected next to the laser device (2), and a phase-locked amplifier (4) is connected between the laser device (2) and the processing device (1); A target gas (31) is arranged in the anti-interference component (3), a monitor (33) is connected to the target gas (31), an air intake device (32) is arranged on the monitor (33), and a reflector (34) is arranged at one end of the target gas (31).

2. The anti-interference laser gas detection system according to claim 1, characterized in that: The monitor (33) includes a humidity compensation device (331), a temperature compensation device (332) and a gas concentration compensation device (333), respectively; the humidity compensation device (331), the temperature compensation device (332) and the gas concentration compensation device (333) are all connected to the target gas (31); the monitor (33) is flange-connected to the air intake device (32); and the other end of the target gas (31) is connected to the laser device (2).

3. The anti-interference laser gas detection system according to claim 2 is characterized in that: When the humidity compensation device (331) is in operation, it is divided into Yes and No. When Yes, it means that the humidity of the intake gas is normal and meets the laser gas detection standard. When the humidity compensation device (331) is No, it means that the intake gas is unqualified and the gas detection calculation is discarded. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

4. The anti-interference laser gas detection system according to claim 2, characterized in that: When the temperature compensation device (332) is in operation, it is divided into Yes and No. When Yes, it indicates that the humidity of the intake gas is normal and meets the laser gas detection standard. When the temperature compensation device (332) is No, it indicates that the intake gas is unqualified and the gas detection calculation is discarded. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

5. The anti-interference laser gas detection system according to claim 2, characterized in that: When the gas concentration compensation device (333) is in operation, it is divided into Yes and No. When Yes, it indicates that the humidity of the intake gas is normal and meets the laser gas detection standard. When the gas concentration compensation device (333) is No, it indicates that the intake gas is unqualified and the gas detection calculation is abandoned. If it is qualified, the gas detection analysis is continued to obtain the echo signal.

6. The anti-interference laser gas detection system according to claim 2, characterized in that: The humidity setting value of the humidity compensation device (331) is set by the monitor (33) of the adjustable potentiometer, the temperature setting value of the temperature compensation device (332) is set by the monitor (33) of the adjustable potentiometer, and the temperature setting value of the gas concentration compensation device (333) is set by the monitor (33) of the adjustable potentiometer.

7. The anti-interference laser gas detection system according to claim 6, characterized in that: The laser device (2) is provided with a laser controller (25), the laser controller (25) is respectively connected to a detector (24) and a laser emitting end (21), a lens (22) and a glass slide (23) are mounted on the laser emitting end (21), the laser emitting end (21) cooperates with the glass slide (23) and the detector (24) through the lens (22), the laser controller (25) is electrically coordinated with the processing device (1), and the detector (24) cooperates with the target gas (31) and the reflector.

8. The anti-interference laser gas detection system according to claim 7, characterized in that: The processing device (1) is provided with a processing system (11), and the processing system (11) is respectively connected with a micro control unit (12) and a data acquisition unit (13), the data acquisition unit (13) is connected with the phase-locked amplifier (4), the data acquisition unit (13) is electrically coordinated with the processing system (11), the micro control unit (12) is interactively coordinated with the processing system (11), and the micro control unit (12) is electrically coordinated with the laser controller (25).

9. The anti-interference laser gas detection system according to claim 8, characterized in that: The processing system (11) may be an integrated display device that displays and presents information through text and images.

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