JP5645676B2 - Gas temperature and component concentration measuring device - Google Patents

Description

  The present invention relates to a measuring device for measuring the temperature and component concentration of a gas in a combustor such as a gas turbine in a non-contact manner.

  Conventionally, the Raman scattering method is frequently used as one of methods for measuring the temperature and composition (component) of a solid. In this Raman scattering method, a solid to be measured is irradiated with laser light, the Raman scattered light generated along with the irradiation of the laser light is received, and spectrum analysis is performed to measure the temperature and composition of the solid. In other words, Raman scattered light is proportional to the number density of the molecules to be measured and includes light that has shifted to a wavelength that is unique to each molecule. Therefore, by analyzing the spectrum of this Raman scattered light, each molecule (component) Can be qualitatively and quantitatively determined, and the temperature can be obtained from the Raman scattered light spectrum waveform.

  On the other hand, when developing products such as aircraft engines, it is important to measure the temperature and composition of gas in the fluid field and combustion field to evaluate the fuel component and exhaust gas characteristics. On the other hand, when the temperature or component concentration of a gas in a combustor such as a gas turbine is directly measured using a temperature sensor such as a probe or a thermocouple, the flow field ( (Measurement field) changes, and inconveniences such as melting of the thermocouple due to high temperature occur. For this reason, it has been proposed and put to practical use to measure the temperature and component concentration of a gas in a combustor such as a gas turbine in a non-contact manner using the Raman scattering method (see, for example, Patent Document 1).

  Further, for example, as shown in FIG. 7, the measuring apparatus A using the Raman scattering method includes a laser head (laser oscillator) 1, a beam stopper 2 that receives the laser light R 1 emitted from the laser head 1, and a laser head 1. The light receiving lens 3, the spectroscope 4, and the Raman scattered light R2 collected by the light receiving lens 3 are disposed on the irradiated laser light R1 so that the focal position (measurement point S) is aligned. An optical fiber 5, a camera 6 that detects light dispersed by the spectroscope 4, and a signal processor (PC) 7 that receives a light reception signal from the camera 6 and performs spectrum analysis are configured.

JP-A-6-294740

  By the way, in the measuring apparatus A using the conventional Raman scattering method, one point on the laser beam R1 irradiated from the laser head 1 becomes the measuring point S, and the Raman scattered light R2 generated at this one measuring point S is received. Thus, the temperature and component concentration of the gas G are measured.

  When this measuring device A is used to measure the temperature and component concentration of the gas G in the combustor such as a gas turbine, the temperature and component of the gas G from the Raman scattered light R2 generated at one point S on the laser beam R1. Since the concentration is obtained, it is impossible to accurately evaluate the property of the gas G in the combustor which is not uniform and changes every moment.

  In addition, it is conceivable to measure the temperature and the component concentration of the gas G at multiple points by moving the measurement point S on the laser beam R1 and traversing. The measured data is not the same time. Further, unsteady data (time-series data) at each measurement point S cannot be taken.

  Furthermore, it is possible to perform multi-point simultaneous measurement by simply preparing a plurality of measuring devices A, but preparing a plurality of sets of expensive cameras 6, laser heads 1, light receiving lenses 3, etc. of this type of measuring device A. Is unrealistic as the cost increases significantly.

The gas temperature and component concentration measuring apparatus according to the present invention includes a laser beam irradiating unit that irradiates laser light toward a plurality of measurement points, and a light receiving unit that receives light generated at the measurement point by irradiating the laser beam. A plurality of spectroscopic means for separating the light received by the light receiving means, and a detecting means for detecting the characteristics of the light split by the spectroscopic means, wherein the light receiving means is provided corresponding to a plurality of measurement points. And a light condensing means for condensing light generated at a plurality of measurement points on the corresponding end faces of the optical fiber , and further, a laser light for measuring point confirmation is passed through the optical path of the light condensing means. Then, it is provided with laser beam irradiation means for measuring point confirmation that emits light to the measuring point side and identifies the measuring point .

In this invention, laser light is irradiated to a plurality of measurement points from the laser light irradiation means, and the light generated at each of the plurality of measurement points is condensed on the end face of the optical fiber corresponding to each measurement point by the light collection means, Light generated at each of a plurality of measurement points can be dispersed by a spectroscope and detected by a detection means. And it becomes possible to obtain | require the temperature and component density | concentration of gas of measurement object from the light reception signal of the several measurement point detected by the detection means. Furthermore, in this invention, when the laser light for measuring point confirmation is irradiated from the laser light irradiating means for measuring point to the light receiving means, the laser light for measuring point confirmation is condensed at one point by the light receiving means. As a result, by irradiating the laser beam from the laser beam irradiation means toward the condensing position of the laser beam for measuring point confirmation, it is possible to align the laser irradiation position so that the laser beam passes through the measuring point reliably. It becomes possible to easily set a plurality of measurement points.

  In the gas temperature and component concentration measuring apparatus of the present invention, it is desirable that the laser beam irradiation means is configured to irradiate a plurality of laser beams.

  In this invention, since a plurality of laser beams are irradiated from the laser beam irradiation means toward the measurement points, light is generated by each laser beam, and the temperature and components of the gas are surely simultaneously measured at a plurality of measurement points. The concentration can be measured.

  Further, the gas temperature and component concentration measuring apparatus of the present invention preferably includes a laser intensity measuring means for measuring the intensity of each of a plurality of laser beams.

  In this invention, when the intensity of a plurality of laser beams emitted from the laser beam irradiation means is measured by the laser intensity measurement means and the received light signal is processed by the detection means, a plurality of values are obtained based on the data measured by the laser intensity measurement means. By correcting the difference in the intensity of the laser light, it is possible to obtain the gas temperature and component concentration with high accuracy.

  In the gas temperature and component concentration measuring apparatus according to the present invention, the condensing means includes a pair of plano-convex lenses, and the pair of plano-convex lenses are spaced from each other and light passing between them is parallel. It is more desirable that the light is disposed.

  In the present invention, the condensing means includes a pair of plano-convex lenses, and the light generated at each measurement point can be received by one plano-convex lens to be a parallel light, and the parallel light is between the pair of plano-convex lenses. Pass through. Further, parallel light can be received by the other plano-convex lens and condensed toward the end face of the optical fiber. And when the light which passes between a pair of plano-convex lenses is made into parallel light in this way, the cut filter which cuts the light of a specific wavelength can be inserted and installed between a pair of plano-convex lenses. Thereby, for example, by inserting and installing a cut filter that cuts the wavelength of the laser light, it is possible to increase the measurement accuracy of the temperature and component concentration of the gas at each measurement point.

  According to the gas temperature and component concentration measuring apparatus of the present invention, light generated at a plurality of measurement points can be received, and the temperature and component concentration of the gas to be measured can be obtained from the light reception signals at the plurality of measurement points. Therefore, it is possible to simultaneously measure the temperature and component concentration of the gas at multiple points. As a result, even when applied to the measurement of gas temperature and component concentration in a combustor such as a gas turbine, the gas temperature and component concentration can be accurately measured, and the gas properties are accurately evaluated. It becomes possible to do.

  Rather than simply preparing multiple measuring devices and performing multipoint simultaneous measurement, light generated at multiple measurement points can be condensed on the end faces of multiple optical fibers to perform simultaneous multipoint measurement. I have to. Thereby, it is possible to simultaneously measure the temperature and component concentration of the gas at a low cost.

It is a figure which shows the temperature and component concentration measuring apparatus of the gas which concerns on one Embodiment of this invention. FIG. 2 is a view taken along the line X1-X1 in FIG. 1 and shows an optical fiber of a gas temperature and component concentration measuring device according to an embodiment of the present invention. It is a figure which shows the laser splitter of the temperature and component concentration measuring apparatus of gas which concerns on one Embodiment of this invention. It is a figure which shows the control method by the shutter delay apparatus of the gas temperature and component density | concentration measuring apparatus which concerns on one Embodiment of this invention. It is a figure which shows the state which irradiated the laser beam for measurement point confirmation from the laser beam irradiation means for measurement point confirmation of the temperature and component concentration measuring apparatus of gas which concerns on one Embodiment of this invention. It is a figure which shows the modification of the temperature and component concentration measuring apparatus of gas which concerns on one Embodiment of this invention. It is a figure which shows the conventional measuring device.

  A gas temperature and component concentration measuring apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the measuring device (gas temperature and component concentration measuring device) B of the present embodiment has a laser light irradiation means 10, a light receiving means 11, a spectroscopic means (spectrometer) 4, and a detecting means 12. And a laser intensity measuring means (power meter, signal correcting device) 13, a shutter delay device 14, and a measuring point confirmation laser beam irradiation means 15.

  The laser beam irradiation means 10 is a device that irradiates a laser beam R1 toward a plurality of measurement points S. In the present embodiment, the laser beam irradiation unit 10 includes a laser head (laser oscillator) 1 and a laser splitter 16.

  The laser head 1 is configured to emit a single laser beam R1 such as an argon ion laser, an excimer laser, or a YAG (yttrium aluminum garnet) laser. In addition, the laser head R1 has a wavelength processing function for removing light having a wavelength other than a desired wavelength by using a crystal or a dye with respect to the emitted laser light R1, for example, when laser light R1 having a wavelength of 532 nm is necessary. In addition, the light other than the desired wavelength can be removed by the wavelength processing function.

  For example, as shown in FIG. 3A, the laser splitter 16 has a number corresponding to the required number of laser beams R1 so as to separate the laser beams R1 emitted from the laser head 1 and subjected to wavelength processing into the required number. The half mirror 17 and the total reflection mirror 18 are appropriately arranged. Thereby, in the measuring apparatus B of the present embodiment, one laser beam R1 irradiated from the laser head 1 is separated into a required number by the laser splitter 16, and a plurality of laser beams R1 are measured from the laser splitter 16 respectively. It is emitted toward S.

  The laser splitter 16 may include a cylindrical lens 19 that condenses (converges) each separated laser beam R1 at the measurement point S as shown in FIG. 3B, for example. In this case, the light intensity generated at the measurement point S can be increased.

  As shown in FIGS. 1 and 2, the light receiving means 11 receives light (Raman scattered light R2 in this embodiment) generated at the measurement points S on the plurality of laser lights R1 emitted from the laser light emitting means 10. The light collecting means 20, the holder 21 that holds the light collecting means 20 in a predetermined position, one end connected to the holder 21, and the other end connected to the light separating means 4. And a fiber cable 22 arranged as described above.

  The light condensing means 20 of the present embodiment is a pair of plano-convex lenses 23 and 24, and these pair of plano-convex lenses 23 and 24 are Raman scattered light generated at a plurality of measurement points S on a plurality of laser beams R1 ( (Light) R <b> 2 is received and disposed on the end face (one end face) 25 a of the optical fiber 25 of the fiber cable 22.

  The fiber cable 22 of the present embodiment is a bundle fiber including a plurality of optical fibers 25, and the pair of plano-convex lenses 23 and 24 correspond to the Raman scattered light R2 generated at the plurality of measurement points S, respectively. It arrange | positions so that it may condense on the end surface 25a of the optical fiber 25. FIG. Further, the pair of plano-convex lenses 23 and 24 are arranged such that the light R2 that passes between each other at a predetermined interval becomes parallel light.

  As shown in FIG. 1, the light receiving means 11 is supported by attaching the light collecting means 20 to a support member (arm) 26. Furthermore, the condensing means 20 is supported so as to be able to advance and retract along the irradiation direction of the laser light R1 emitted from the laser light irradiation means 10. In the present embodiment, the laser beam R1 is irradiated in the lateral direction, and the light condensing means 20 is supported by the arm 26 extending in the lateral direction so as to freely advance and retract.

  The spectroscopic unit 4 includes a prism, a diffraction grating, and the like, and splits the Raman scattered light R2 guided by each optical fiber 5 into a plurality of specific wavelengths.

  The detection means 12 is for detecting the characteristics of the light split by the spectroscopic means 4. In this embodiment, the detection means 12 is a camera 6 for detecting the light by irradiating the photosensitive portion with the light split by the spectroscopic means 4. A signal processor 7 is provided for determining the temperature and component concentration of the gas G at each measurement point S by processing the light reception signal sent from the camera 6 and performing spectrum analysis of the Raman scattered light R2.

  A plurality of laser intensity measuring means 13 are provided according to the number of the plurality of laser beams R1 emitted from the laser splitter 16, and are arranged so that each laser beam R1 emitted from the laser splitter 16 is irradiated. Each laser intensity measuring means 13 measures the intensity of the laser beam R 1 and sends an intensity signal to the signal processor 7.

  The shutter delay device 14 is connected to the laser head 1 and the camera 6. Then, as shown in FIG. 4A, the maximum received light signal intensity can be obtained in synchronization with the laser light (pulse laser) R1 irradiated with pulses from the laser head 1 and considering the delay of laser irradiation. Thus, the delay time is set to control the opening / closing of the shutter of the camera 6. As a result, the ratio (S / N ratio) between the received light signal (measurement signal) of the Raman scattered light R2 generated at each measurement point S when the laser light R1 is irradiated and the noise (S / N ratio) increases, and the Raman scattered light R2 is highly accurate. Spectrum analysis. That is, the measurement accuracy of the temperature and component concentration of the gas G is improved.

  In addition, as shown in FIG. 4B, the shutter delay device 14 of the present embodiment irradiates and shutters the laser light R1 in order to obtain a signal (background signal) when the laser light R1 is not irradiated. It is also possible to shift the timing of opening and closing (completely detuned). As a result, the background signal is acquired, and the background signal is subtracted from the received light signal, whereby the spectrum analysis of the Raman scattered light R2 can be performed with higher accuracy.

  The measurement point confirmation laser beam irradiation means 15 is for specifying the measurement point S by irradiating the measurement point confirmation laser beam R3 from the light receiving side. That is, the laser beam irradiation means 15 for measuring point confirmation irradiates the other end face 25b of each optical fiber 5 of the bundle fiber 22 connected to the spectroscopic means 4 with the laser light R3 as shown in FIGS. As a result, the irradiated laser beam R3 is incident on the condensing means 20 from the one end face 25a of each optical fiber 25, and is condensed (converged) at one point by the condensing means 20.

  Then, when measuring the temperature and component concentration of the gas G using the gas temperature and component concentration measuring device B of the present embodiment having the above-described configuration, first, the laser light irradiation means 10 in the measurement target gas G The measuring device B is installed at a predetermined position so that the laser beam R1 is irradiated on the surface.

  Next, the laser beam R3 for confirmation is irradiated from the laser beam irradiation means 15 for measuring point confirmation, and the laser beam R1 is irradiated from the laser head 1 of the laser light irradiation means 10. At this time, the confirmation laser beam R <b> 3 enters the pair of plano-convex lenses 23 and 24 from the end face 25 a of each optical fiber 25. The plurality of confirmation laser beams R3 that have passed through the plurality of optical fibers 25 are condensed (converged) at different points.

  On the other hand, the laser beam R1 irradiated from the laser head 1 is separated into a necessary number by the laser splitter 16 and emitted. Then, the laser irradiation positions are aligned so that the plurality of laser beams R1 emitted from the laser splitter 16 pass through the condensing points (measurement points S) of the plurality of confirmation laser beams R3, respectively. A plurality of measurement points S are set.

  At the stage where the installation of the plurality of measurement points S is completed, measurement of the temperature and component concentration of the gas G is started. First, when a plurality of laser beams R1 are irradiated from the laser beam irradiation unit 10 toward the measurement points S, the Raman scattered light R2 generated at each measurement point S is collected by the condensing unit 20 (a pair of plano-convex lenses 23 and 24). Thus, the light is condensed on the end face 25a of the corresponding optical fiber 25. Further, the Raman scattered light R <b> 2 generated at each measurement point S is guided by the corresponding optical fiber 25 and split into a plurality of specific wavelengths by the spectroscopic means 4.

  Then, the light dispersed by the spectroscopic means 4 is irradiated on the photosensitive portion 6a of the camera 6 and detected by the detecting means 12, and the light reception signal is sent from the camera 6 to the signal processor 7 to be processed, whereby the Raman scattered light R2 is processed. A spectral analysis is performed. Thereby, the temperature and component concentration of the gas G at a plurality of measurement points S at the same time are obtained without affecting the measurement field.

  On the other hand, at this time, the intensity signals of the plurality of laser beams R1 emitted from the laser splitter 16 are sent from the laser intensity measuring means 13 to the signal processor 7, and when the received light signal is processed, the plurality of laser beams are based on this data. The difference in R1 intensity is corrected.

  Further, as shown in FIG. 4A, the shutter delay device 14 controls the opening and closing of the shutter of the camera 6 so as to obtain the maximum received light signal intensity in synchronization with the laser beam R1 irradiated with a pulse. As a result, the ratio (S / N ratio) between the received light signal and noise increases, and the temperature and component concentration of the gas G are calculated with higher accuracy. Further, as shown in FIG. 4B, the shutter delay device 14 controls the irradiation of the laser beam R1 and the timing of opening / closing the shutter to be shifted so that a signal (background) when the laser beam R1 is not irradiated is controlled. Signal) is sent to the signal processor 7. Then, by performing the process of subtracting the background signal from the light reception signal, the temperature and component concentration of the gas G are calculated with higher accuracy.

  Here, before measuring the gas G to be measured, it is desirable to measure the temperature and component concentration of a reference gas such as nitrogen in the atmosphere and calibrate the measuring device B. That is, a plurality of laser beams R1 are irradiated from the laser beam irradiation means 10 into a reference gas whose temperature and component concentration are known, and a correction value in the setting state is calculated by the signal processor 7, and the received light signal is corrected with this correction value. To do. For example, the amount of change in the received light signal is corrected with glass or the like. Thereby, the temperature and component concentration of the gas G are calculated with higher accuracy.

  Therefore, in the gas temperature and component concentration measuring apparatus B of the present embodiment, the laser beam R1 is irradiated from the laser beam irradiation means 10 to the plurality of measurement points S, and the light R2 generated at each of the plurality of measurement points S is collected. The light means 20 can focus the light on the end face 25a of the optical fiber 25 corresponding to each measurement point S, and the light R1 generated at each of the plurality of measurement points S can be separated by the spectroscopic means 4 and detected by the detection means 12. . And it becomes possible to obtain | require the temperature and component density | concentration of gas G to be measured from the light-receiving signal of the some measurement point S detected by the detection means 12. FIG.

  Therefore, according to the gas temperature and component concentration measuring apparatus B of the present embodiment, the light R2 generated at each of the plurality of measurement points S is received, and the temperature of the gas G to be measured from the light reception signals at the plurality of measurement points S. Since the component concentration can be obtained, the temperature and component concentration of the gas G can be simultaneously measured at multiple points. Thereby, even if it is a case where it is a case where it applies to the measurement of the temperature of gas G in a combustor, such as a gas turbine, and component concentration, it can measure the temperature of gas G with high accuracy, and component concentration, It becomes possible to evaluate the properties.

  Further, instead of simply preparing a plurality of measurement devices and performing multipoint simultaneous measurement, the light R2 generated at each of the plurality of measurement points S is condensed on the respective end faces 25a of the plurality of optical fibers 25 to perform the multipoint measurement. Simultaneous measurement is possible. Thereby, it is possible to simultaneously measure the temperature and the component concentration of the gas G at multiple points while reducing the cost.

  Further, in the gas temperature and component concentration measuring apparatus B of the present embodiment, a plurality of laser beams R1 are irradiated from the laser beam irradiation means 10 toward the measurement point S, and thus the light R2 is emitted by each laser beam R1. It is possible to reliably measure the temperature and the component concentration of the gas G simultaneously at a plurality of measurement points S.

  Further, when the intensity of the plurality of laser beams R1 emitted from the laser beam irradiation unit 10 is measured by the laser intensity measurement unit 13 and the received light signal is processed by the detection unit 12, the data measured by the laser intensity measurement unit 13 is used. By correcting the difference in the intensity of the plurality of laser beams R1, the temperature and component concentration of the gas G can be obtained with high accuracy.

  Furthermore, in the gas temperature and component concentration measuring apparatus B of the present embodiment, the light condensing means 20 includes a pair of plano-convex lenses 23, 24, and the pair of plano-convex lenses 23, 24 are spaced apart from each other. It arrange | positions so that the light to pass may become parallel light. That is, the light condensing means 20 includes a pair of plano-convex lenses 23 and 24, and the light R2 generated at each measurement point S can be received by one plano-convex lens 23 to be parallel light. It passes between the plano-convex lenses 23 and 24. Further, the other plano-convex lens 24 can receive parallel light and condense it toward the end face 25 a of the optical fiber 25.

  When the light R2 passing between the pair of plano-convex lenses 23 and 24 is converted into parallel light, a cut filter for cutting light of a specific wavelength is inserted between the pair of plano-convex lenses 23 and 24. can do. Thus, for example, by inserting and installing a cut filter that cuts the wavelength of the laser beam R1, the measurement accuracy of the temperature and component concentration of the gas G at each measurement point S can be further increased. The same effect can be obtained by providing a cut filter on the spectroscopic unit 4 and the other end face 25b side of the optical fiber 25 to cut light of a specific wavelength.

  Further, when the measurement point confirmation laser beam R3 is irradiated from the measurement point confirmation laser beam irradiation unit 15 to the light reception unit 11, the measurement point confirmation laser beam R3 is condensed at one point by the light reception unit 11. As a result, the laser light irradiation means 10 irradiates the laser light R1 toward the condensing position of the measurement point confirmation laser light R3, thereby positioning the laser irradiation position so that the laser light R1 passes through the measurement point S with certainty. Therefore, it is possible to easily set a plurality of measurement points S.

  The embodiment of the gas temperature and component concentration measuring apparatus according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the present invention. is there.

  For example, in the present embodiment, it is assumed that the temperature and the component concentration of the gas G are measured by irradiating the laser beam R1 from the laser beam irradiation unit 10 and receiving the Raman scattered light R2 generated at the measurement point S. Although performed, for example, the laser beam R1 may be irradiated and the fluorescence R2 generated at the measurement point S may be received to measure the temperature and the component concentration of the gas G, and may be generated at the measurement point S according to the present invention. The light R2 to be performed does not necessarily have to be Raman scattered light.

  In the present embodiment, a plurality of laser beams R1 are irradiated from the laser beam irradiation means 10, measurement points S are provided on each laser beam R1, and Raman scattered light R2 generated at each of the plurality of measurement points S is received. The temperature and the component concentration of the gas G are received in two dimensions and simultaneously measured at multiple points. On the other hand, one laser beam R1 is irradiated from the laser beam irradiation means 10, and the Raman scattered light R2 generated at each of the plurality of measurement points S provided on the one laser beam R1 is received. You may comprise so that the temperature and component density | concentration of gas G may measure multipoint simultaneously in one dimension.

  In addition, although the light collecting means 20 of the light receiving means 11 that receives the light R2 generated at each of the plurality of measurement points S is a pair of plano-convex lenses 23 and 24, one convex lens is used as the light collecting means 20. May be. Further, the number and arrangement of the plurality of optical fibers 25 for guiding the light R2 generated at each of the plurality of measurement points S are determined according to the number of measurement points S, the set position, the configuration of the light collecting means 20, and the like. The (arrangement) is determined and is not limited as in the present embodiment.

  Further, the temperature and component concentration of the gas G may be traversed while moving the light collecting means 20 supported by the support member 26 and moving the measurement point S on the laser beam R1. Further, in the present embodiment, the laser beam R1 is irradiated in the lateral direction, and the condensing means 20 is supported by the support member 26 so as to be movable back and forth along the irradiation direction of the laser beam R1. On the other hand, as shown in FIG. 6, the laser beam R1 may be irradiated in the vertical direction, for example, by being reflected by a mirror 27. In this case, the measuring device B may be configured so that the condensing means 20 is advanced and retracted along the laser beam R1 irradiated in the vertical direction.

1 Laser head (laser oscillator)
2 Beam stopper 3 Receiving lens 4 Spectroscope (spectral means)
5 Optical fiber 6 Camera 7 Signal processor 10 Laser light irradiation means 11 Light receiving means 12 Detection means 13 Laser intensity measurement means 14 Shutter delay device 15 Measurement point confirmation laser light irradiation means 16 Laser splitter 17 Half mirror 18 Total reflection mirror 19 Cylindrical Lens 20 Condensing means 21 Holder 22 Fiber cable 23 Plano-convex lens 24 Plano-convex lens 25 Optical fiber 25a One end face (end face)
25b Other end surface 26 Support member (arm)
27 Mirror A Conventional measuring device B Gas temperature and component concentration measuring device G Gas R1 Laser light R2 Raman scattered light (light generated at the measuring point)
R3 Measuring point confirmation laser beam S Measuring point

Claims (4)

Laser light irradiation means for irradiating laser light toward a plurality of measurement points;
A light receiving means for receiving light generated at a measurement point by irradiating a laser beam;
A spectroscopic means for splitting the light received by the light receiving means;
Detecting means for detecting the characteristics of the light split by the spectroscopic means,
The light receiving means includes a plurality of optical fibers provided corresponding to the plurality of measurement points, and a light collecting means for condensing the light generated at the plurality of measurement points on the corresponding end surfaces of the optical fibers. ,
Furthermore, by Idemitsu the measurement point confirmation laser light to the measurement point side through the optical path of the focusing means, characterized in that it comprises a measurement point confirmation laser beam irradiation means that identifies the measurement point gas Temperature and component concentration measuring device. In the gas temperature and component concentration measuring device according to claim 1,
A gas temperature and component concentration measuring apparatus, wherein the laser beam irradiation means is configured to irradiate a plurality of laser beams. In the gas temperature and component concentration measuring device according to claim 2,
A gas temperature and component concentration measuring device comprising laser intensity measuring means for measuring the intensity of each of a plurality of laser beams. In the gas temperature and component concentration measuring device according to any one of claims 1 to 3,
The light collecting means comprises a pair of plano-convex lenses;
The gas temperature and component concentration measuring apparatus, wherein the pair of plano-convex lenses are arranged so as to be spaced apart from each other and light passing between them becomes parallel light.

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