Unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device

Abstract

The utility model relates to the technical field of nitrogen oxide measurement, and provides an unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device which comprises an integrated optical cavity, a gas inlet of the integrated optical cavity is connected with a gas pretreatment module, and a gas outlet of the integrated optical cavity is connected with a sampling pump; a first high-reflectivity mirror and a second high-reflectivity mirror are symmetrically arranged at the two ends in the integrated optical cavity; a first plano-convex lens and a second plano-convex lens are respectively fixed on the outer sides of the first high-reflectivity mirror and the second high-reflectivity mirror in the integrated optical cavity through a fixing bracket; a light source is arranged on one side of the first plano-convex lens through a fixing support, an optical fiber is arranged at the focus of the second plano-convex lens through a fixing support, and the optical fiber is connected with a spectrograph. The utility model provides a nitrogen oxide measuring device for an unmanned aerial vehicle. The nitrogen oxide measuring device for the unmanned aerial vehicle guarantees portability and keeps high measuring accuracy at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen oxide measurement, and in particular to an unmanned aerial vehicle-borne atmospheric nitrogen oxide concentration measuring device. Background Art

[0002] Nitrogen oxides (NOx) are a collective term for nitric oxide (NO) and nitrogen dioxide (NO2). They participate in a variety of complex chemical reactions in the atmosphere and are key substances affecting air quality and climate change. NO is the primary nitrogen oxide emitted by human activities and natural sources. Atmospheric NO2 is primarily produced through reactions between NO and oxidants such as peroxyl radicals (HO2, RO2) and ozone. NOx and volatile organic compounds (VOCs) can undergo photochemical reactions under sunlight, leading to ozone pollution. Furthermore, NOx oxidation is a key process in secondary particulate matter pollution and the global nitrogen cycle. Therefore, accurate measurement of nitrogen oxides is fundamental to in-depth research into tropospheric atmospheric chemistry. With the development of society and the economy, ground-based measurements alone are no longer sufficient to meet the growing demands of scientific research and the precise tracing of atmospheric pollution sources. Therefore, conducting flight-based measurements of atmospheric NOx within the boundary layer is of great significance for tracing the sources of atmospheric pollutant emissions and studying the causes of atmospheric pollution.

[0003] At present, the existing NOx measurement technology carried by drones mainly relies on sensor technology. However, due to the limitations of size and the inherent limitations of the technical hardware structure, the detection accuracy of sensors carried by drones is relatively poor, and there are also deficiencies in stability. They are easily affected by the movement of drones, making it difficult to meet the relevant needs of pollution tracing and scientific research. Utility Model Content

[0004] In order to overcome the defect of low detection accuracy of the NOx detection device carried by the above-mentioned UAV, the utility model provides a UAV-mounted atmospheric nitrogen oxide concentration measuring device.

[0005] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0006] An unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device comprises: an integrated optical cavity, wherein an air inlet of the integrated optical cavity is communicated with the atmosphere, and an air outlet of the integrated optical cavity is connected to a sampling pump;

[0007] A first high-reflection mirror and a second high-reflection mirror are symmetrically placed at both ends of the integrated optical cavity; a first plano-convex lens and a second plano-convex lens are respectively provided on both sides of the integrated optical cavity; the first plano-convex lens, the first high-reflection mirror, the second high-reflection mirror and the second plano-convex lens are coaxially arranged;

[0008] A light source is provided on one side of the first plano-convex lens, an optical fiber is provided at the focus of the second plano-convex lens, and the optical fiber is connected to the spectrometer.

[0009] As a preferred solution, the gas pretreatment module includes a NOx remover and a solenoid valve; the solenoid valve is connected to a first controller; the first interface of the solenoid valve is connected to the air outlet of the NOx remover, and the second interface of the solenoid valve is connected to the air inlet of the integrated optical cavity.

[0010] As a preferred solution, the gas pretreatment module is further provided with an O3 generator, the O3 generator is connected to the second controller, and the gas outlet of the O3 generator is connected to the third interface of the solenoid valve.

[0011] As a preferred solution, a flow limiting hole is provided in the passage connecting the air outlet of the integrated optical cavity and the sampling pump.

[0012] As a preferred solution, a particle filtering device is provided in the passage connecting the air inlet of the integrated optical cavity and the gas pre-processing module.

[0013] As a preferred solution, the light source, the first plano-convex lens, the second plano-convex lens and the optical fiber are respectively mounted on fixed brackets on both sides of the integrated optical cavity through two-dimensional adjustment brackets.

[0014] As a preferred solution, the inner surface of the integrated optical cavity is provided with a mirror reflection layer.

[0015] As a preferred solution, a temperature and pressure sensor is provided in the passage connecting the air outlet of the integrated optical cavity and the sampling pump.

[0016] As a preferred solution, the light source includes a constant temperature and constant current light source.

[0017] As a preferred solution, the measuring device further includes a GPS recorder.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0019] The utility model proposes an unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measurement device. A sampling pump provides suction to the atmosphere, thereby drawing gas into an integrated optical cavity. A light source generates a light signal and transmits it to an optical fiber through the integrated optical cavity. The optical fiber transmits the light signal to a spectrometer for optical signal analysis to obtain the nitrogen oxide gas concentration. The utility model optimizes the light propagation path through the integrated optical cavity design, reduces light loss, and enhances the stability and detection accuracy of subsequent signals. Secondly, an optical coupling cavity structure with a high-reflection mirror is used inside the integrated optical cavity, which effectively increases the signal intensity and thereby enhances the sensitive detection capability of nitrogen oxide concentrations. Finally, through the combination of optical fiber and spectrometer, real-time concentration monitoring is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the drone-mounted atmospheric nitrogen oxide concentration measurement device of Example 1.

[0021] Figure 2 This is a schematic structural diagram of the drone-mounted atmospheric nitrogen oxide concentration measurement device of Example 2.

[0022] Figure 3 The vertical distribution profile diagram of NO2 concentration measured in the atmosphere of a certain place using the utility model is shown.

[0023] Among them, 1-integrated optical cavity, 101-fixed bracket, 2-integrated optical cavity air inlet, 3-integrated optical cavity air outlet, 4-first high-reflective mirror, 5-second high-reflective mirror, 6-sampling pump, 7-first plano-convex lens, 8-second plano-convex lens, 9-light source, 10-optical fiber, 11-spectrometer, 12-O3 generator, 13-NOx remover, 14-solenoid valve, 15-first controller, 16-second controller, 17-temperature and pressure sensor, 18-flow limiting hole, 19-particulate matter filter device. DETAILED DESCRIPTION

[0024] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0025] In order to better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size;

[0026] It is understandable to those skilled in the art that some well-known structures and descriptions thereof may be omitted in the drawings.

[0027] The technical solution of the present utility model is further described below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] This embodiment proposes an unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measurement device, such as Figure 1 FIG. 1 is a schematic structural diagram of the device for measuring atmospheric nitrogen oxide concentration carried by a drone according to the present embodiment.

[0030] The unmanned aerial vehicle atmospheric nitrogen oxide concentration measuring device proposed in this embodiment includes an integrated optical cavity 1, an air inlet 2 of the integrated optical cavity 1 is connected to the atmosphere, and an air outlet 3 of the integrated optical cavity 1 is connected to a sampling pump 6;

[0031] A first high-reflection mirror 4 and a second high-reflection mirror 5 are symmetrically placed at both ends of the integrated optical cavity 1; a first plano-convex lens 7 and a second plano-convex lens 8 are respectively provided on both sides of the integrated optical cavity 1; the first plano-convex lens 7, the first high-reflection mirror 4, the second high-reflection mirror 5 and the second plano-convex lens 8 are coaxially arranged;

[0032] A light source 9 is provided on one side of the first plano-convex lens 7 , and an optical fiber 10 is provided at the focus of the second plano-convex lens 8 . The optical fiber 10 is connected to a spectrometer 11 .

[0033] Specifically, the first high-reflection mirror 4 and the second high-reflection mirror 5 are installed on both sides of the integrated optical cavity 11 and are sealed by a circular ring gasket and a special lens top cover. The deformation of the circular ring gasket on the high-reflection mirror can be changed by the lens top cover to achieve absolute alignment of the two high-reflection mirrors.

[0034] In this embodiment, a sampling pump 6 provides the power for sampling, and gas enters the integrated optical cavity 1. Within the integrated optical cavity 1, two identical first high-reflection mirrors 4 and second high-reflection mirrors 5 are symmetrically placed at both ends of the integrated optical cavity 11. The high-reflectivity surfaces of the high-reflection mirrors are relatively aligned to form an optically coupled cavity. A first plano-convex lens 7 close to the side of the light source 9 converts the input light source into parallel light. After entering the integrated optical cavity 1, the parallel light is emitted by the high-reflection mirror and then focused on the connector of the optical fiber 10 through the second plano-convex lens 8. The optical fiber 10 transmits the signal to the spectrometer 11 for signal acquisition to complete the measurement of the nitrogen oxide concentration.

[0035] Among them, NO2 has characteristic absorption in the range of 435-465nm. When the integrated optical cavity 1 is filled with the test gas containing NO2, the light intensity distribution will be significantly reduced compared to when the optical cavity is filled with gas without NO2. The degree of reduction is closely related to the concentration of NO2, so the optical signal can be converted into a gas concentration value.

[0036] The utility model effectively improves the signal intensity by adopting an optical coupling cavity structure with a high-reflection mirror, thereby enhancing the sensitive detection capability of nitrogen oxide concentration. In addition, it ensures the simplicity and size of the structure and can be used for gas concentration detection on drones.

[0037] Example 2

[0038] This embodiment makes improvements based on the drone-mounted atmospheric nitrogen oxide concentration measurement device proposed in Example 1. Figure 2 FIG. 1 is a schematic structural diagram of the device for measuring atmospheric nitrogen oxide concentration carried by a drone according to the present embodiment.

[0039] In an optional embodiment, the measuring device also includes a gas pretreatment module; the gas pretreatment module includes a NOx remover 13 and a solenoid valve 14; the solenoid valve 14 is connected to a first controller 15; the first interface of the solenoid valve 14 is connected to the air outlet of the NOx remover 13, and the second interface of the solenoid valve 14 is connected to the air inlet 2 of the integrated optical cavity 1.

[0040] In this embodiment, the gas pretreatment module can acquire two measurement signals, including a zero-point acquisition mode and a NO2 measurement mode. The first controller 15 controls the interface switch of the solenoid valve 14 to switch between measurement modes. When the first controller 15 controls the first interface of the solenoid valve 14 to open, allowing the sampled airflow to pass through the NOx remover 13, the device is in zero-point acquisition mode. When the first controller 15 controls the first interface of the solenoid valve 14 to close, preventing the sampled airflow from passing through the NOx remover 13, the system is in NO2 measurement mode. The zero-point acquisition mode allows the spectral distribution in the absence of NO2 to be obtained as a reference spectrum, providing a basis for subsequent NO2 concentration measurements.

[0041] In an optional embodiment, the gas pretreatment module is further provided with an O3 generator 12 , the O3 generator 12 is connected to the second controller 16 , and the gas outlet of the O3 generator 12 is connected to the third interface of the solenoid valve 14 .

[0042] In this embodiment, the gas preprocessing module can achieve three measurement signal acquisition modes: zero-point acquisition mode, NOx measurement mode, and NO2 measurement mode. The first controller 15 and the second controller 16 respectively control the interface switch of the solenoid valve 14 and the operating state of the O3 generator 12 to achieve cyclic switching between measurement modes. When the first controller 15 controls the first interface of the solenoid valve 14 to open, allowing the sampled gas flow to pass through the NOx remover 13, the device is in zero-point acquisition mode. When the first controller 15 controls the first interface of the solenoid valve 14 to close, preventing the sampled gas flow from passing through the NOx remover 13, and the second controller 16 controls the O3 generator 12 to be in an inoperative state, the system is in NO2 measurement mode. When the first controller 15 controls the first interface of the solenoid valve 14 to open and close, preventing the sampled gas flow from passing through the NOx remover 13, and the second controller 16 controls the O3 generator 12 to be in an operational state, generating O3 that reacts with NO in the gas flow to be measured to form NO2, the system is in NOx measurement mode. This utility model has different detection modes, which can respectively detect the NOx or NO2 concentration in the sampled gas, making the utility model more widely applicable.

[0043] In an optional embodiment, a flow limiting hole 18 is provided in the passage connecting the gas outlet 3 of the integrated optical cavity 1 and the sampling pump 6 .

[0044] In this embodiment, the flow rate of the gas to be measured is precisely controlled by the flow limiting hole 18 at the rear. The stable flow rate can reduce the measurement error caused by uneven flow and ensure the reliability of the data; it can also effectively prevent eddy currents caused by excessive gas flow rate, which helps to ensure the accuracy of optical measurement.

[0045] In an optional embodiment, a particle filtering device 19 is provided in the passage connecting the air inlet 2 of the integrated optical cavity 1 and the gas pre-processing module.

[0046] In this embodiment, the particulate matter filter device 19 can effectively remove particulate matter in the air, ensuring that the gas sample entering the optical cavity is free of impurities, thereby improving the accuracy of concentration measurement.

[0047] In an optional embodiment, the light source 9 , the first plano-convex lens 7 , the second plano-convex lens 8 and the optical fiber 10 are respectively mounted on the fixing brackets 101 on both sides of the integrated optical cavity 1 through two-dimensional adjustment frames.

[0048] In this embodiment, a two-dimensional adjustment mount allows fine-tuning of the angles of the light source 9, first plano-convex lens 7, and second plano-convex lens 8. By fine-tuning the angles of the light source and lenses, the focus and propagation path of light can be optimized, maximizing the intensity and quality of the optical signal and ensuring higher detection sensitivity. Furthermore, the design of the two-dimensional adjustment mount facilitates installation and maintenance, facilitating rapid calibration and commissioning.

[0049] In an optional embodiment, a mirror reflection layer is provided on the inner surface of the integrated optical cavity 1 .

[0050] As an exemplary illustration, the integrated optical cavity 1 is made of an aluminum alloy material with a mirror-finished inner surface.

[0051] In this embodiment, the mirror-reflective layer significantly improves light reflection efficiency and reduces light loss, thereby enhancing the intensity of the intracavity optical signal and improving the sensitivity and accuracy of nitrogen oxide concentration detection. Furthermore, the use of aluminum alloy for mirror-finishing not only reduces the weight of the cavity but also improves its corrosion resistance and durability, ensuring long-term stability and reliability.

[0052] In an optional embodiment, a temperature and pressure sensor 17 is provided in the passage connecting the gas outlet 3 of the integrated optical cavity 1 and the sampling pump 6 .

[0053] In this embodiment, the temperature and pressure parameters in the optical cavity can be measured in real time by the temperature and pressure sensor 17, which can provide necessary data for gas measurement and ensure that the gas state in the optical cavity remains within the optimal range, thereby improving the accuracy and reliability of concentration measurement.

[0054] In an optional embodiment, the light source 9 includes a constant temperature and constant current light source.

[0055] As an exemplary illustration, light source 1 uses an LED with a central wavelength of 450nm, a specially made aluminum block as a carrier for the LED, and a small fan and cooling fins to balance the heat released by the LED during operation, so that the light source temperature is maintained at 25±0.1°C. At the same time, a constant current source is used to ensure stable current input to the LED.

[0056] In this embodiment, the constant-temperature and constant-current light source can avoid the deviation of the light intensity distribution output by the light source.

[0057] In an optional embodiment, the measuring device further includes a GPS recorder.

[0058] In this embodiment, the geographical distribution of gas concentration data can be visualized by combining the data from the GPS recorder. The GPS recorder can record the flight latitude and longitude, flight altitude, and flight time, and these data can be used for subsequent analysis of the geographical distribution of atmospheric nitrogen oxides.

[0059] Example 3

[0060] This embodiment proposes a drone-mounted atmospheric nitrogen oxide concentration measurement device for specific implementation based on Embodiment 1.

[0061] Turn on the light source 9. After the light source temperature stabilizes, turn on the spectrometer 11 and set the operating temperature of the spectrometer 11 to -20°C to maintain its working state. Time parameters are set in the first controller 15 and the second controller 16 for cyclic control, controlling the cyclic switching of the different interfaces of the solenoid valve 14 and the working state of the O3 generator 12, thus achieving cyclic switching measurement in three modes.

[0062] Turn on the sampling pump 6. After the gas enters the device, it first switches between measurement modes through the gas pretreatment module, and then removes atmospheric particulate matter through the particulate matter filter. Specifically, periodic cycle measurements are achieved through the zero-point acquisition mode, NOx measurement mode, and NO2 measurement mode, and the optical signal collected in the spectrometer is subjected to spectral fitting and data correction. After confirming that the sampling is normal, the device is installed on a drone. The drone carries the device to perform high-altitude sampling observations in the target area, and the collected GPS signals and spectral signals are transmitted back to the ground in real time for subsequent analysis. By combining the GPS recorder and spectrometer data, the concentration data of atmospheric nitrogen oxides can be obtained.

[0063] Specifically, in NO2 measurement mode, the O3 generator 12 in the device does not produce O3. At this time, NO in the atmosphere is not oxidized to produce NO2. Therefore, the NO2 concentration measured by the detection device in this mode is the NO2 concentration in the ambient atmosphere. In NOx measurement mode, the O3 generator 12 in the system produces O3. At this time, NO in the atmosphere reacts with O3 to produce NO2. In this mode, the NO2 concentration measured by the detection device is the concentration of nitric oxide (NO) and nitrogen dioxide (NO2) in the ambient atmosphere.

[0064] When the integrated optical cavity 1 is filled with the test gas containing NO2, the constant temperature and constant current light source outputs a stable 450nm wavelength. The light source 9 is connected to the first plano-convex lens 7 at one focal length. The first plano-convex lens 7 realizes the parallel introduction of the light source signal into the first high-reflection mirror 4 and enters the integrated optical cavity 1 composed of two high-reflection mirrors. The light signal is continuously reflected in the integrated optical cavity 1, and the NO2 in the test gas is continuously subjected to characteristic absorption. The signal derived from the second high-reflection mirror 5 is focused by the second plano-convex lens 8 and derived from the optical fiber 10 to the spectrometer 11. The spectrometer 11 performs spectrometry and photon detection to obtain the light intensity distribution covering the characteristic absorption of NO2 within a certain wavelength range. The absorption coefficient α is calculated by sampling the spectrum (I(λ)) and combining the spectrum distribution in the zero-point acquisition mode without NO2 as the reference spectrum (I0(λ)). Then, the NO2 concentration is obtained by combining the spectrum fitting software. The calculation formula of the absorption coefficient α is as follows:

[0065]

[0066] Where λ is the wavelength, R(λ) is the reflectivity of the high-reflectivity mirror at the calibrated wavelength λ, and n i is the concentration of the molecule to be measured, d eff is the effective cavity length of the integrated optical cavity, σ i (λ) is the absorption cross section of NO2 molecules at wavelength λ, α Mie (λ) and α Rayl (λ) represents the light intensity loss caused by Mie scattering and Rayleigh scattering at wavelength λ, respectively.

[0067] More specifically, the spectral signals of the NO2 measurement mode and the NOx measurement mode when performing measurement are respectively and Spectral signal. Select the measured spectrum in zero point acquisition mode (I REF ) as the reference spectrum, and the measurement spectrum in NO2 mode is selected As I(λ), calculate the absorption coefficient corresponding to the NO2 concentration The calculation formula is as follows:

[0068]

[0069] Similarly, the measured spectrum (I REF ) as the reference spectrum, and the measurement spectrum in NOx mode is selected As I(λ), calculate the absorption coefficient corresponding to the sum of the concentrations of NO and NO2 The calculation formula is as follows:

[0070]

[0071] According to the decomposition characteristics of cavity enhanced absorption spectroscopy technology, the measurement spectrum in NO2 mode can be selected As a reference spectrum, the measurement spectrum in the NOx mode is selected As I(λ), calculate the absorption coefficient α corresponding to the NO concentration [NO] , which is calculated as follows:

[0072]

[0073] After fitting the calculated absorption coefficient with the absorbance using spectrum fitting software, the NO and NO2 concentrations can be obtained. Then, the vertical distribution profile of NO2 concentration can be fitted using the signal transmitted by the GPS recorder. Figure 3 As shown, it is a vertical distribution profile diagram of the NO2 concentration measured in the atmosphere of a certain place using the utility model, wherein the red line segment with triangles represents the NO2 concentration when the drone is rising, and the blue line segment with dots represents the NO2 concentration when the drone is descending.

[0074] The same or similar reference numerals correspond to the same or similar components;

[0075] The terms used in the drawings to describe positional relationships are for illustrative purposes only and should not be construed as limiting this patent;

[0076] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device, characterized in that: include: An integrated optical cavity (1), wherein an air inlet (2) of the integrated optical cavity (1) is in communication with the atmosphere, and an air outlet (3) of the integrated optical cavity (1) is connected to a sampling pump (6); A first high-reflection mirror (4) and a second high-reflection mirror (5) are symmetrically placed at both ends of the integrated optical cavity (1); a first plano-convex lens (7) and a second plano-convex lens (8) are respectively arranged on both sides of the integrated optical cavity (1); the first plano-convex lens (7), the first high-reflection mirror (4), the second high-reflection mirror (5) and the second plano-convex lens (8) are coaxially arranged; A light source (9) is provided on one side of the first plano-convex lens (7), an optical fiber (10) is provided at the focus of the second plano-convex lens (8), and the optical fiber (10) is connected to a spectrometer (11).

2. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to claim 1, characterized in that: The measuring device further comprises a gas pre-processing module; the gas pre-processing module comprises a NOx remover (13) and a solenoid valve (14); the solenoid valve (14) is connected to a first controller (15); a first interface of the solenoid valve (14) is connected to the gas outlet of the NOx remover (13), and a second interface of the solenoid valve (14) is connected to the gas inlet (2) of the integrated optical cavity (1).

3. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to claim 2, characterized in that: The gas pretreatment module is further provided with an O3 generator (12), the O3 generator (12) is connected to the second controller (16), and the gas outlet of the O3 generator (12) is connected to the third interface of the solenoid valve (14).

4. The device for measuring atmospheric nitrogen oxide concentration carried by an unmanned aerial vehicle according to claim 2, characterized in that: A particle filtering device (19) is provided in the passage between the air inlet (2) of the integrated optical cavity (1) and the second interface of the solenoid valve (14).

5. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to claim 1, characterized in that: A flow-limiting hole (18) is provided in the passage connecting the air outlet (3) of the integrated optical cavity (1) and the sampling pump (6).

6. The device for measuring atmospheric nitrogen oxide concentration onboard an unmanned aerial vehicle according to claim 1, characterized in that: The light source (9), the first plano-convex lens (7), the second plano-convex lens (8), and the optical fiber (10) are respectively mounted on fixed brackets (101) on both sides of the integrated optical cavity (1) via two-dimensional adjustment brackets.

7. The device for measuring atmospheric nitrogen oxide concentration onboard an unmanned aerial vehicle according to claim 1, characterized in that: The inner surface of the integrated optical cavity (1) is provided with a mirror reflection layer.

8. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to any one of claims 1 to 7, characterized in that: A temperature and pressure sensor (17) is provided in the passage connecting the air outlet (3) of the integrated optical cavity (1) and the sampling pump (6).

9. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to any one of claims 1 to 7, characterized in that: The light source (9) comprises a constant temperature and constant current light source.

10. The unmanned aerial vehicle-mounted atmospheric nitrogen oxide concentration measuring device according to any one of claims 1 to 7, characterized in that: The measuring device also includes a GPS recorder.

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