KR101901207B1 - Matching method for detecting position of remote detection systems for hydrogen gas - Google Patents

Abstract

The present invention relates to a method of matching a detection position of a remote detection system for a hydrogen gas, capable of accurately detecting a concentration of the hydrogen gas. In the remote sensing system for the hydrogen gas, including a beam transmission unit for irradiating a laser beam to an irradiation target region, a light reception unit for receiving light by taking a Raman scattering signal generated by the laser beam irradiated by the beam transmission unit as detection light, and a conversion unit for receiving and separating the detection light received by the light reception unit and converting the separated detection light into an electrical signal, a method of matching an output direction of the laser beam irradiated by the beam transmission unit with a light reception direction of the light reception unit includes the steps of: a) detaching a photomultiplier tube (PMT) of the conversion unit; b) arranging a guide laser module at a position where the PMT is detached to irradiate laser light; c) irradiating the laser beam of the beam transmission unit while the guide laser module irradiates the laser light; and d) matching an irradiation direction of the laser beam with a direction of the light reception unit in which the Raman scattering signal is received, by positioning a second projection pattern projected by the laser beam of the beam transmission unit in a range of a first projection pattern projected by the laser light of the guide laser module, or by adjusting a position of the light reception unit or the beam transmission unit such that the second projection pattern is positioned in the range of the first projection pattern.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for matching a detection position of a hydrogen gas remote sensing system,

The present invention relates to a method for matching a detection position of a hydrogen gas remote sensing system, and more particularly, to a method for matching a detection position of a hydrogen gas in a hydrogen gas remote sensing system for detecting the distribution and concentration of hydrogen gas by a radiation area irradiating the laser beam, And a detection location matching method of a hydrogen gas remote sensing system capable of matching a direction of a light receiving unit so as to receive a region of the generated Raman scattering signal.

In the event of a serious accident at a nuclear power plant, a large amount of hydrogen gas is generated during the oxidation process of the nuclear fuel covering material, which is an important cause of the secondary explosion. The Fukushima nuclear power plant accident that occurred in Japan in 2011 is a typical example of the hydrogen gas generated during the nuclear accident in the nuclear power plant caused by the tsunami.

Therefore, hydrogen gas detection and removal equipment is essential for nuclear safety.

Hydrogen gas is an environmentally friendly energy source that does not emit pollutants during the combustion process. However, it is one of the dangerous substances because it is very strong in combustion and explosion. In the event of a major accident at a nuclear power plant, a large amount of hydrogen gas is generated during the oxidation process of the fuel, which is a cause of secondary accidents in nuclear containment buildings. Therefore, in order to secure the safety of nuclear power plants, detection technology of hydrogen gas is very important.

For detection of hydrogen gas, a method using a catalyst oxidation method, a sensor such as a semiconductor oxidation sensor, a thermal conductivity sensor, and an electrochemical sensor is mainly used. However, the detection method using such a sensor has a disadvantage that a large number of sensors must be installed in order to measure a wide space because the detection effective distance of the sensor is short.

Hydrogen gas shows a very strong Raman scattering phenomenon and is detected by using hydrogen Raman cell using this Raman scattering phenomenon.

Light Detection and Ranging (LIDAR), which utilizes the Raman phenomenon of hydrogen gas, is capable of quantitatively measuring the concentration and distance information of hydrogen gas. It can be used for hydrogen gas detection by Ninomiya Hideki, Raman laid system was developed.

The hydrogen gas and hydrogen flame monitoring method and apparatus described in Patent Registration No. 10-1126951 are filed and registered as inventors by Hideki Ninomiya and Koji Ichigawa, To a hydrogen gas and hydrogen flame monitoring apparatus for collecting light to be detected having a wavelength of about 309 nm and converting it into an electronic image, amplifying the light, and converting the light into an optical image to detect hydrogen gas.

In the hydrogen gas detection system using the conventional Raman ladder including the above-described technique, the region irradiated with the laser beam must be matched with the direction of the receiver receiving the Raman scattering signal. That is, if the direction of the receiving part should be aligned with the area where the laser beam is irradiated, an accurate Raman scattering signal can be received. Also, if the area irradiated with the laser beam is varied or the distance is changed, the direction of the receiving part must be adjusted correspondingly. However, in the prior art, there is little research on this.

KR 10-1126951 B1 (Mar. 07, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a hydrogen gas remote sensing device capable of matching a direction of a laser beam irradiated to a region to be irradiated with a direction of a light- And to provide a method for detecting position detection of the system.

According to another aspect of the present invention, there is provided a method for matching a detection position of a hydrogen gas remote sensing system, comprising: a beam transmitting unit for irradiating a laser beam onto a region to be irradiated; a Raman scattering signal generated by the laser beam irradiated by the beam transmitting unit; And a converting unit for receiving and separating the detection light received by the light receiving unit and converting the separated detection light into an electrical signal, wherein in the hydrogen gas remote sensing system, A method for matching an output direction of a laser beam with a light receiving direction of a light receiving unit, comprising the steps of: a) removing a PMT (Phitomultiplier Tube) of the conversion unit; b) arranging a guide laser module at a position where the PMT is detached C) the laser beam of the beam transmitting section is irradiated with the laser beam from the guide laser module, D) positioning a second projection pattern projected by the laser beam of the beam transmission section in a range of a first projection pattern projected by the laser light source of the guide laser module, The position of the light receiving unit or the beam transmitting unit is adjusted so as to be positioned in the projection pattern range so that the direction of the laser beam is matched with the direction of the light receiving unit that receives the Raman scattering signal.

Here, the guide laser module is installed inside the conversion unit and generates a laser light source by oscillation, and the generated laser light source is outputted through the light receiving unit.

In addition, the wavelength of the laser light source output from the guide laser module may be 500 to 700 nm, and the first projection pattern projected by the laser light source of the guide laser module may include a plurality of the first projection patterns on a predetermined circumference.

In addition, the PMT to be desorbed is provided on the same axis as the incident direction of the Raman scattering signal received by the light receiving portion.

According to the present invention, since the direction of the laser beam irradiated to the irradiation area and the direction of the light receiving part can be matched to the area where the Raman scattering signal is generated by the irradiated laser beam, the reception ratio of the Raman scattering signal generated by the laser beam is So that the concentration of the hydrogen gas can be accurately detected.

FIG. 1 is a view showing a state in which a detection system to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is applied is installed in a nuclear power plant.
2 is a block diagram of a hydrogen gas remote sensing system;
FIG. 3 is a block diagram of a beam transmission unit, a light receiving unit, and a conversion unit in a detection system using a detection position matching method of a hydrogen gas remote sensing system according to the present invention.
FIG. 4 is a block diagram of a beam transmission unit to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is applied. FIG.
5 is a configuration diagram of a light receiving unit and a conversion unit to which the detection position matching method of the hydrogen gas remote sensing system according to the present invention is applied.
FIG. 6 is a block diagram of a conversion unit and a light receiving unit to which the method of detecting a position of a hydrogen gas remote sensing system according to the present invention is applied. FIG.
FIG. 7 is a block diagram of another embodiment of a light receiving unit and a conversion unit to which the detection position matching method of the hydrogen gas remote sensing system according to the present invention is applied. FIG.
8 is a configuration diagram of a guide laser module to which the detection position matching method of the hydrogen gas remote sensing system according to the present invention is applied.
9 is a view illustrating a shape projected by a guide laser module to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a hydrogen gas remote sensing system capable of preventing the combustion or spontaneous combustion of hydrogen gas by detecting distribution and concentration of hydrogen gas by remotely detecting the distribution and concentration of hydrogen gas generated in a nuclear power plant, will be.

FIG. 1 is a view illustrating a configuration of a detection system to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is installed in a nuclear power plant, and FIG. 2 is a diagram illustrating a configuration of a hydrogen gas remote sensing system .

1 and 2, a hydrogen gas remote sensing system according to the present invention includes a beam transmission unit 100, a light receiving unit 200, a conversion unit 300, a control unit 400, a display unit 500, And a driving unit 600.

The beam transmission unit 100, the light receiving unit 200 and the conversion unit 300 are installed in the containment building 1 of the nuclear power plant and the control unit 400 and the display unit 500 are installed in the control room .

FIG. 3 is a block diagram of a beam transmitter, a light receiving unit, and a conversion unit applied to the hydrogen gas remote sensing system according to the present invention.

The beam transmission unit 100 irradiates a laser beam to a region to be irradiated and irradiates the laser beam with a laser beam to generate Nd capable of generating a solid laser by adding a rare element of neodymium (Nd) to a YAG (Yttrium Aluminum Garnet) : YAG laser can be used.

4 is a block diagram of a beam transmitter applied to a hydrogen gas remote sensing system according to the present invention.

4, the beam transmission unit 100 mainly includes a laser driver 110 for generating a fundamental wave of 1064 nm and a wavelength conversion unit for converting the wavelength of the laser beam generated by the laser driver 110 120). At this time, the wavelength converter 120 converts the fundamental wavelength of 1064 nm and outputs a laser beam having a wavelength of 355 nm.

Here, the configuration of the oscillation unit 120 includes an ND filter 121 for limiting the transmittance of the laser beam output from the laser driver 110, A beam expander 123 for expanding the laser beam that has passed through the diaphragm 122, and a line for transmitting only a laser beam having a wavelength of 355 nm out of the laser beam output from the beam expander 123. [ A line filter 124 and reflection mirrors 125 and 126 for totally reflecting the laser beam having passed through the line filter 124.

Here, the hydrogen gas remote sensing system according to the present invention is installed in the containment building of the nuclear power plant, so that it is not necessary to have a relatively long detection capability. In addition, it needs to be miniaturized as it is installed inside the containment building. Accordingly, it is sufficient that the laser beam irradiated through the oscillation unit 120 can detect hydrogen gas within an effective distance of up to 20 m. Therefore, the laser beam irradiated from the oscillation unit 120 is irradiated at a wavelength of 355 nm, It is sufficient if it has an energy of 13 mJ.

The light receiving unit 200 receives the Raman scattering signal generated by the laser beam irradiated by the beam transmitting unit 100 as detection light and the conversion unit 300 receives the detection light received from the light receiving unit 200 And converts it into an electrical signal.

FIG. 5 is a diagram illustrating a configuration of a light receiving unit and a conversion unit applied to the hydrogen gas remote sensing system according to the present invention.

5, the light receiving unit 200 includes a condenser lens 210, a diaphragm 220, a dispersion lens 230, and a notch filter 240.

The condenser lens 210 condenses the Raman scattering signal, and a 50 mm optical telephoto lens can be used for miniaturization.

The diaphragm 220 functions to adjust the amount of detection light incident from the condenser lens 210. The dispersion lens 230 disperses the detection light that has passed through the diaphragm 220, 240 removes the frequency of a specific frequency band from the detection light that has passed through the dispersion lens 230, and passes only the effective frequency.

5, the conversion unit 300 includes a beam splitter 310 for separating the detection light output from the light receiving unit 200, and a beam splitter 310 for detecting the detection light parallel to the incident angle using the beam splitter 310. [ A first PMT (Phytomultiplier Tube) 330 for converting the detection light having passed through the first band-pass filter 320 into an electric signal using photoelectrons, A second band-pass filter 340 for passing only the set frequency band with respect to the detection light perpendicular to the incident angle using the beam splitter 310, and a detection light passing through the second band- And a second PMT (Photomultiplier Tube) 350 for converting the signal into an electric signal.

Here, the first band-pass filter 320 passes a frequency of 416 nm ± 0.15 nm, and the second band-pass filter 340 passes a frequency of 386.7 nm ± 0.15 nm.

When a 355 nm laser beam is irradiated with hydrogen gas, Raman scattering occurs at a wavelength of 416 nm. When irradiated with nitrogen gas, Raman scattering at a wavelength band of 386 nm occurs.

According to the configuration of the conversion unit 300, the frequency of Raman scattering with respect to the hydrogen gas is detected by the first bandpass filter 320 and the first PMT 330, and the second bandpass filter 340 And the second PMT 350 detects the frequency of Raman scattering with respect to the nitrogen gas.

In the configuration of the conversion unit 300, condenser lenses 360 and 370 may be provided between the band-pass filter and the PMT to guide the detection light having passed through the band-pass filter to the PMT.

In addition, the electrical signals converted by the first PMT 330 and the second PMT 350 are converted into digital signals by using a digitizer, and the converted digital signals are transmitted to the controller 400. FIG.

In this case, the digitizer has a bandwidth of 1 GHz and a high-speed digitizer capable of sampling at 1 GS / s can be used to measure Raman scattering signals.

The control unit 400 processes the detection light separated by the conversion unit 300 and calculates the distribution and the concentration.

At this time, the controller 400 may use a Q-switch signal of a laser to synchronize the laser beam output from the beam transmitter 100 with the digitizer.

The Q-switch signal is one of the methods of generating a laser light pulse output beam. When the Q value of the laser resonator is excited in the state where the Q value is decreased, sufficient energy is accumulated in the laser medium and then the Q value is instantaneously increased It is a signal that the accumulated energy is emitted by a fast and sharp optical pulse. This Q-switched scheme is used to obtain high peak output and narrow optical pulses

In addition, the controller 400 may be configured to enable a cumulative average to increase the signal-to-noise ratio (S / N ratio).

The control unit 400 is configured to control the oscillation wavelength of the laser beam irradiated by the beam transmission unit 100. That is, the oscillation frequency is controlled through feedback so that the oscillation frequency of the laser beam irradiated by the beam transmission unit 100 is maintained at 355 nm.

The display unit 500 visually displays the distribution and concentration of the detection light under the control of the controller 400. [

The pan tilt driving unit 600 varies the right or left or up and down directions of the beam transmitting unit 100, the light receiving unit 200 and the converting unit 300 to vary the hydrogen gas detecting area. And the beam transmitter 100, the light receiving unit 200, and the conversion unit 300 are mounted on a mount (not shown in the drawing) which can be moved up and down. At this time, the operation of the pan tilt driver 600 may be performed by an operation control signal of the controller 400, and the operation control signal may be output in accordance with a predetermined path.

Accordingly, it is constituted to receive the Raman scattering signal generated by the irradiated laser beam and the irradiation direction of the laser beam by the operation of the mount, and it is possible to detect the distribution and concentration of hydrogen and nitrogen in the set zone.

Meanwhile, the directions of the beam transmitter 100 and the light receiver 200 should coincide with each other.

That is, when the directions of the beam transmitting unit 100 and the light receiving unit are not coincident with each other, only a part of the Raman scattering signal generated by the laser beam irradiated by the beam transmitting unit 100 can not be detected or detected.

When the directions of the beam transmitting unit 100 and the light receiving unit are not coincident with each other, it may be determined that the concentration of the hydrogen gas is low or that there is no hydrogen gas, so that the direction of the beam transmitting unit 100 and the direction of the light receiving unit must match.

In the present invention, the guide laser module 380 is installed in the converting unit 300 and the direction of the converting unit 300 and the light receiving unit 200 is changed to the beam transmitting unit 100, respectively.

The guide laser module 380 irradiates the laser of the point light source, and a laser diode may be used therein. When a laser diode is used, the laser diode is relatively small and has a small threshold current for laser oscillation compared to other laser devices.

The guide laser module 380 is installed inside the conversion unit 300 and generates a laser light source by oscillation, and the generated laser light source is output through the light receiving unit 200.

FIG. 6 is a view illustrating a configuration of a conversion unit and a light receiving unit to which the detection position matching method of the hydrogen gas remote sensing system according to the present invention is applied.

Referring to FIG. 6, the guide laser module 380 installed in the conversion unit 300 may be installed in a manner to replace one selected from the first PMT 330 or the second PMT 350 .

That is, after one PMT selected from the first PMT 330 or the second PMT 350 is detached (removed), the guide laser module 380 is installed, and according to the guidance of the guide laser module 380 The direction of the conversion unit 300 and the light receiving unit 200 is aligned with the direction of the beam transmission unit 100 and then the installed guide laser module 380 is installed in a state of maintaining the coincided direction, Thereby detecting the concentration of the hydrogen gas.

Preferably, the guide laser module 380 removes the first PMT 330 so as to be installed on the same axis as the incident direction of the Raman scattering signal received by the light receiving part 200, and the first PMT 330 It can be installed at a detached position.

Alternatively, as shown in FIG. 7, the guide laser module 380 installed in the conversion unit 300 may maintain the first PMT 330 and the second PMT 350 as they are, And may be configured to irradiate a laser of a light source.

That is, the laser of the point light source generated in the guide laser module 380 may be refracted through the beam splitter 310 and irradiated through the light receiving unit 200.

A condenser lens 387 for condensing the light source irradiated from the guide laser module 380 and a condenser lens 388 for condensing the light output from the condenser lens 387 are provided between the guide laser module 380 and the beam splitter 310. [ A band-pass filter 388 that passes only the frequency band can be configured.

FIG. 8 is a diagram illustrating a configuration of a guide laser module to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is applied.

Referring to FIG. 8, the guide laser module 380 includes a base plate 381, a heat sink 382 formed on one side of the base plate 381, and a heat sink 382 provided on the heat sink 382. A plurality of power pins 384 provided on the other surface of the base plate 381 and electrically connected to the laser diode 383, A cap 385 disposed on one side of the cap 381 for protecting the heat sink 382 and the laser diode 383 and a cap 385 disposed at the center of the cap 385, And a condenser lens 386 through which the laser beam is condensed and emitted.

At this time, the emitted laser light source is projected on the inner wall of the nuclear power plant in the condenser lens 386, and a projection pattern or a projection guide groove for confirming the projection position may be provided.

The laser beam emitted from the guide laser module 380 is configured to have a wavelength different from that of the laser beam output from the beam transmission unit 100.

That is, the wavelength of the laser beam output from the beam transmission unit 100 is 355 nm, and the wavelength of the laser beam emitted from the guide laser module 380 for visual determination is 500 to 700 nm . More specifically, it may be composed of one wavelength selected from green having a wavelength of 510 to 535 nm, yellow-green having a wavelength of 540 to 570 nm, yellow having a wavelength of 575 to 595 nm or red having a wavelength of 600 to 700 nm.

9 is a view illustrating a shape projected by a guide laser module to which a detection position matching method of a hydrogen gas remote sensing system according to the present invention is applied.

9, the laser light source emitted from the guide laser module 380 is projected on the inner wall of the nuclear power plant and the first projection pattern 380A is displayed, and the laser beam emitted from the beam transmission unit 100 The projected second projection pattern 100A is displayed and can be visually confirmed.

Here, the first projection patterns 380A may be configured so as to appear on a plurality of predetermined circumferences, and may be configured to be projected to the center of a predetermined circle according to design conditions.

Since the wavelength of the first projection pattern 380A is different from the wavelength of the second projection pattern 100A, it can be visually recognized by the projection color.

It is also possible to place the second projection pattern 100A in the range of the first projection pattern 380A or to place the second projection pattern 100A in the range of the first projection pattern 380A The position of the beam transmitter 100 is adjusted so that the area irradiated with the laser beam matches the direction of the receiver receiving the Raman scattering signal.

A method for matching the detection position of the hydrogen gas remote sensing system according to the present invention will be described.

a) First, the PMT (Phytomultiplier Tube) of the conversion unit 300 is detached.

At this time, the PMT to be desorbed may be one selected from the first PMT 330 or the second PMT 350. However, in order to secure the linearity of the guide laser module 380 to be mounted after the PMT is detached, the PMT 300 to be mounted and detached is provided with the first PMT 300 installed on the same axis as the incident direction of the Raman scattering signal received by the light- Lt; / RTI >

b) Next, the guide laser module 380 is disposed at the position where the PMT is detached, and the laser light source is irradiated.

Accordingly, the laser light source generated in the guide laser module 380 is output through the light receiving unit 200.

Further, the output laser beam source is projected onto the inner wall of the containment building of the nuclear power plant. Here, the projected laser light source may be configured to have a plurality of patterns on the circumference as shown in Fig.

c) irradiates the laser beam of the beam transmission unit 100 in a state in which the guide laser module 380 is driven to irradiate the laser beam.

The laser beam irradiated from the beam transmission unit 100 is also projected onto the inner wall of the containment building of the nuclear power plant.

d) placing the second projection pattern 100A projected by the laser beam of the beam transmission section 100 in the range of the first projection pattern 380A projected by the laser light source of the guide laser module 380 The position of the light receiving unit 200 or the beam transmitting unit 100 is adjusted so that the second projection pattern 100A is positioned within the range of the first projection pattern 380A.

That is, when the projection area of the first projection pattern 380A is set as the irradiation area, the position of the beam transmission part 100 is adjusted so that the second projection pattern 100A is in the range of the first projection pattern 380A When the projection area of the second projection pattern 100A is set as the irradiation area, the position of the light receiving part 300 is adjusted so that the first projection pattern 380A is in the range of the second projection pattern 100A .

With this configuration, the direction in which the laser beam output from the beam transmission unit 100 is irradiated matches the direction of the light receiving unit 200 that receives the Raman scattering signal.

According to the present invention, since the direction of the laser beam irradiated to the irradiation area and the direction of the light receiving part can be matched to the area where the Raman scattering signal is generated by the irradiated laser beam, the reception ratio of the Raman scattering signal generated by the laser beam is So that the concentration of the hydrogen gas can be accurately detected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: beam transmission unit 200:
210: condenser lens 220: diaphragm
230: Dispersion lens 240: Notch filter
300: conversion unit 310: beam splitter
320: first band pass filter 330: first PMT
340: second band pass filter 350: second PMT
360, 370: condenser lens 380: guide laser module
400: control unit 500: display unit
600: a pan tilt driver

Claims (5)

A light receiving unit 200 for receiving the Raman scattering signal generated by the laser beam irradiated by the beam transmitting unit 100 as detection light, a light receiving unit 200 for receiving the Raman scattering signal generated by the laser beam irradiated by the beam transmitting unit 100, And a conversion unit (300) for converting the separated detection light into an electrical signal. The hydrogen gas remote sensing system according to claim 1, wherein the sensor unit A method for matching an output direction and a light receiving direction of the light receiving unit (200)
a) removing the PMT (Phytomultiplier Tube) of the converting unit 300,
b) arranging a guide laser module 380 at the position where the PMT is detached, irradiating the laser light source,
c) irradiating the laser beam of the beam transmitter 100 in a state where the guide laser module 380 irradiates the laser beam source,
d) placing the second projection pattern 100A projected by the laser beam of the beam transmission section 100 in the range of the first projection pattern 380A projected by the laser light source of the guide laser module 380 , The position of the light receiving unit 200 or the beam transmitting unit 100 is adjusted so that the second projection pattern 100A is positioned within the range of the first projection pattern 380A to adjust the direction in which the laser beam is irradiated and the Raman scattering signal And the direction of the light receiving unit 200 to be received is matched,
The guide laser module 380,
A base plate 381;
A heat sink 382 formed on one side of the base plate 381;
A laser diode (383) provided in the heat sink (382) and generating a laser light source by a power source applied thereto;
A plurality of power pins (384) provided on the other surface of the base plate (381) and electrically connected to the laser diode (383);
A cap 385 installed on one side of the base plate 381 to protect the heat sink 382 and the laser diode 383; And
And a condenser lens 386 installed at the center of the cap 385 and condensed and emitted from the laser beam generated from the laser diode 383,
The wavelength of the laser light source output from the guide laser module 380 is in the range of 500 to 700 nm. The wavelength ranges from 510 to 535 nm, from 540 to 570 nm, and from 575 to 595 nm. Yellow or red having a wavelength of 600 to 700 nm,
A plurality of first projection patterns 380A projected by the laser light source of the guide laser module 380 are formed on a predetermined circumference,
The laser generated in the guide laser module 380 is refracted through the beam splitter 310 of the conversion unit 300 and irradiated through the light receiving unit 200,
Between the guide laser module 380 and the beam splitter 310, a condenser lens 387 for condensing a light source irradiated by the guide laser module 380 and a condenser lens 387 for condensing the light of a predetermined frequency band A band-pass filter 388 which passes only the band-
The beam transmission unit 100, the light receiving unit 200, and the conversion unit 300 are installed on an upper portion of a mount capable of a pan operation to be moved left and right by a motor and a tilt operation to be moved up and down, The light receiving unit 200, and the converting unit 300 according to a path previously set by the laser beam irradiating unit 200 to change the detection region so that the irradiation direction of the laser beam is changed by the operation of the mount, And a pan tilt driver (600) configured to receive the Raman scattering signal generated by the irradiated laser beam and to detect the distribution and concentration of hydrogen and nitrogen in the set zone. Detecting position matching method.
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