阅读说明：本技术 一种无人机在线气体监测装置 (Online gas monitoring device of unmanned aerial vehicle ) 是由 赵思睿 赵峰 杨皖平 许春华 瞿小君 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种无人机在线气体监测装置,包括安装在无人机上的监测箱,监测箱内依次设置有颗粒物检测装置和二氧化硫检测装置,二氧化硫检测装置后部连接有并接的氮氧化物检测装置和臭氧检测装置,颗粒物检测装置前部设置有储气室,储气室的进气口上连接有第一气泵和取样头,取样头伸出监测箱实现取样；本发明无人机在线气体监测装置,结构紧凑,实现对同一气体进行不同物质的监测,提高环境监测精度。(The invention discloses an online gas monitoring device of an unmanned aerial vehicle, which comprises a monitoring box arranged on the unmanned aerial vehicle, wherein a particulate matter detection device and a sulfur dioxide detection device are sequentially arranged in the monitoring box, the rear part of the sulfur dioxide detection device is connected with a nitrogen oxide detection device and an ozone detection device which are connected in parallel, the front part of the particulate matter detection device is provided with a gas storage chamber, the gas inlet of the gas storage chamber is connected with a first gas pump and a sampling head, and the sampling head extends out of the monitoring box to realize sampling; the online gas monitoring device for the unmanned aerial vehicle is compact in structure, realizes monitoring of different substances on the same gas, and improves environment monitoring precision.)

1. The utility model provides an online gas monitoring device of unmanned aerial vehicle, a serial communication port, including installing the monitoring box on unmanned aerial vehicle, particulate matter detection device and sulfur dioxide detection device have set gradually in the monitoring box, the nitrogen oxide detection device and the ozone detection device that sulfur dioxide detection device rear portion is connected with and connects, the particulate matter detection device front portion is provided with the reservoir, be connected with first air pump and sampling head on the air inlet of reservoir, the sampling head stretches out the monitoring box and realizes the sample.

2. The unmanned aerial vehicle online gas monitoring device of claim 1, wherein a third flow meter is connected to a gas outlet of the gas storage chamber, and a gas inlet of the particulate matter detection device is connected to the rear portion of the third flow meter;

an arc-shaped partition plate is arranged in the air storage chamber, the partition plate divides the internal space of the air storage chamber into an air inlet area and an air outlet area which are communicated with each other, and an air inlet and an air outlet of the air storage chamber are respectively arranged on the air inlet area and the air outlet area; the air inlet and the air outlet of the air storage chamber cannot be communicated in a straight line.

3. The unmanned aerial vehicle online gas monitoring device of claim 2, wherein the sampling head comprises a sampling tube, the sampling tube comprises a vertically arranged cylindrical main tube, the main tube is open at two ends, and the bottom opening of the main tube is communicated with the gas inlet of the first gas pump;

the side surface of the main pipe is uniformly provided with a plurality of side branch pipes, the side branch pipes are obliquely arranged, the arrangement direction of the side branch pipes is consistent with the flight direction of the unmanned aerial vehicle, a side windward port is arranged on the windward side of each side branch pipe, and the side windward port is communicated with the main pipe;

the main pipe is also provided with a lower branch pipe which is parallel to and communicated with the main pipe, the top of the lower branch pipe is communicated with the main pipe, the bottom of the lower branch pipe is provided with a lower windward port, and the lower windward port is communicated with the main pipe.

4. The online gas monitoring device for unmanned aerial vehicle of claim 1, wherein the particulate matter detection device comprises a particulate matter detection box and a detection channel arranged in the particulate matter detection box, a filter belt, a detection unit emitter and a detection unit receiver are arranged in the detection channel, the gas inlet and the gas outlet of the particulate matter detection device are respectively arranged at the ends of the detection channel at two sides of the filter belt, a second gas pump is connected to the gas outlet of the particulate matter detection device, the detection channel at two sides of the filter belt is respectively arranged in the detection unit emitter and the detection unit receiver, the detection unit receiver is arranged close to the second gas pump, and the gas outlet of the second gas pump is communicated with the sulfur dioxide detection device.

5. The unmanned aerial vehicle online gas monitoring device of claim 1, wherein the sulfur dioxide detection device comprises a sulfur dioxide seal detection tube, an air inlet and an air outlet are respectively arranged at two ends of the sulfur dioxide seal detection tube, and a third air pump is connected to the air outlet of the sulfur dioxide seal detection tube; the sulfur dioxide seals the detection tube both ends and seals respectively and be provided with first ultraviolet generator and first ultraviolet light receiver, first ultraviolet generator and first ultraviolet light receiver front portion are provided with first light filter and second light filter respectively, be connected with first photomultiplier on the first ultraviolet light receiver.

6. An unmanned aerial vehicle online gas monitoring device according to claim 5, wherein a first branch pipe and a second branch pipe are connected to the rear portion of the sulfur dioxide detection device, the first branch pipe and the second branch pipe are respectively connected with the nitrogen oxide detection device and the ozone detection device, and a second flowmeter and a third flowmeter are respectively arranged on the first branch pipe and the second branch pipe.

7. The unmanned aerial vehicle online gas monitoring device of claim 1, wherein the nitrogen oxide detection device comprises an oxidation filter material cylinder for oxidizing NO into NO2, a converter for converting N02 into N0 is connected to the rear portion of the oxidation filter material cylinder, a reaction chamber is connected to the rear portion of the converter, an ozone generator is connected to the reaction chamber, and a second photomultiplier is connected to the reaction chamber.

8. The online gas monitoring device for unmanned aerial vehicle of claim 1, wherein the ozone detection device comprises an ozone detection tube which is arranged in a sealing manner, an air inlet and an air outlet are connected to the ozone detection tube, the air inlet of the ozone detection tube is communicated with the second branch tube, a second ultraviolet light generator and a second ultraviolet light receiver are respectively arranged at two ends of the ozone detection tube, and a third photomultiplier is connected to the second ultraviolet light receiver.

9. The online gas monitoring device for the unmanned aerial vehicle as claimed in claim 1, wherein the unmanned aerial vehicle is provided with a controller, the controller comprises a central control module, and a communication module, an unmanned aerial vehicle control module and a detection control module which are in signal connection with the central control module, and the particulate matter detection device, the sulfur dioxide detection device, the nitrogen oxide detection device and the ozone detection device are all controlled by the detection control module.

Technical Field

The invention belongs to the field of environmental monitoring, and particularly relates to an online gas monitoring device for an unmanned aerial vehicle.

Background

Unmanned aerial vehicles are emerging products in recent years, and are automatically controlled by a controller, and can move to areas where people are difficult to reach in person, such as the air, disaster areas and above the disaster areas, in pipelines and the like. Combine unmanned aerial vehicle and gaseous monitoring devices, realization that can be fine carries out environmental monitoring to above-mentioned region, however, environmental monitoring devices or gaseous monitoring devices function singleness among the prior art can not realize once only accomplishing the monitoring of multiple gas, if directly install various monitoring devices on unmanned aerial vehicle, can lead to that unmanned aerial vehicle burden is great, influence unmanned aerial vehicle's duration. Simultaneously, because unmanned aerial vehicle in the motion also can cause the gas composition that various monitoring devices detected to be different, it is low or monitor inaccurately to the gas monitoring precision of same environment.

Disclosure of Invention

The invention aims to provide an online gas monitoring device of an unmanned aerial vehicle, which is compact in structure, realizes monitoring of different substances on the same gas and improves the environment monitoring precision.

The invention provides an online gas monitoring device of an unmanned aerial vehicle, which comprises a monitoring box arranged on the unmanned aerial vehicle, wherein a particulate matter detection device and a sulfur dioxide detection device are sequentially arranged in the monitoring box, the rear part of the sulfur dioxide detection device is connected with a nitrogen oxide detection device and an ozone detection device which are connected in parallel, the front part of the particulate matter detection device is provided with a gas storage chamber, the gas inlet of the gas storage chamber is connected with a first gas pump and a sampling head, and the sampling head extends out of the monitoring box to realize sampling.

Preferably, an air outlet of the air storage chamber is connected with a third flow meter, and the rear part of the third flow meter is connected with an air inlet of the particulate matter detection device;

an arc-shaped partition plate is arranged in the air storage chamber, the partition plate divides the internal space of the air storage chamber into an air inlet area and an air outlet area which are communicated with each other, and an air inlet and an air outlet of the air storage chamber are respectively arranged on the air inlet area and the air outlet area; the air inlet and the air outlet of the air storage chamber cannot be communicated in a straight line.

Preferably, the sampling head comprises a sampling tube, the sampling tube comprises a vertically arranged cylindrical header pipe, two ends of the header pipe are opened, and the bottom opening of the header pipe is communicated with the air inlet of the first air pump;

the side surface of the main pipe is uniformly provided with a plurality of side branch pipes, the side branch pipes are obliquely arranged, the arrangement direction of the side branch pipes is consistent with the flight direction of the unmanned aerial vehicle, a side windward port is arranged on the windward side of each side branch pipe, and the side windward port is communicated with the main pipe;

the main pipe is also provided with a lower branch pipe which is parallel to and communicated with the main pipe, the top of the lower branch pipe is communicated with the main pipe, the bottom of the lower branch pipe is provided with a lower windward port, and the lower windward port is communicated with the main pipe.

Preferably, the particulate matter detection device includes particulate matter detection case and the test channel of setting in the particulate matter detection case, be provided with filtering tape, detecting element transmitter and detecting element receiver in the test channel, the test channel tip of filtering tape both sides is arranged respectively in the air inlet and the gas outlet of particulate matter detection device, is connected with the second air pump on particulate matter detection device's the gas outlet, in the test channel of filtering tape both sides is arranged respectively in to detecting element transmitter and detecting element receiver, and the detecting element receiver is close to the setting of second air pump, the gas outlet and the sulfur dioxide detection device intercommunication of second air pump.

Preferably, the sulfur dioxide detection device comprises a sulfur dioxide sealing detection tube, two ends of the sulfur dioxide sealing detection tube are respectively provided with an air inlet and an air outlet, and the air outlet of the sulfur dioxide sealing detection tube is connected with a third air pump; the sulfur dioxide seals the detection tube both ends and seals respectively and be provided with first ultraviolet generator and first ultraviolet light receiver, first ultraviolet generator and first ultraviolet light receiver front portion are provided with first light filter and second light filter respectively, be connected with first photomultiplier on the first ultraviolet light receiver.

Preferably, the rear part of the sulfur dioxide detection device is connected with a first branch pipe and a second branch pipe, the first branch pipe and the second branch pipe are respectively connected with the nitrogen oxide detection device and the ozone detection device, and the first branch pipe and the second branch pipe are respectively provided with a second flowmeter and a third flowmeter.

Preferably, the nitrogen oxide detection device comprises an oxidation filter material cylinder for oxidizing NO into NO2, the rear part of the oxidation filter material cylinder is connected with a conversion furnace for converting N02 into N0, the rear part of the conversion furnace is connected with a reaction chamber, the reaction chamber is connected with an ozone generator, and the reaction chamber is connected with a second photomultiplier.

Preferably, the ozone detection device comprises an ozone detection tube which is arranged in a sealing manner, an air inlet and an air outlet are connected to the ozone detection tube, the air inlet of the ozone detection tube is communicated with the second branch tube, a second ultraviolet light generator and a second ultraviolet light receiver are respectively arranged at two ends of the ozone detection tube, and a third photomultiplier is connected to the second ultraviolet light receiver.

Preferably, be provided with the controller on the unmanned aerial vehicle, the controller includes central control module and with central control module signal connection's communication module, unmanned aerial vehicle control module and detection control module, there are particulate matter detection device, sulfur dioxide detection device, nitrogen oxide detection device and ozone detection device to control by detecting control module.

The unmanned aerial vehicle online gas monitoring device has the beneficial effects that:

1. make up and integrate multiple detection device, realize once only can detect multiple material in the air on the one hand, on the other hand reduces detection device's volume, prolongs unmanned aerial vehicle's duration and duration.

2. The detection device can detect multiple substances in the same gas, improves the detection precision and improves the judgment precision of each substance in the air in the same environment.

3. The design of sampling head structure, unmanned aerial vehicle of being convenient for detects gas sample detection when flying in the equidirectional not.

Drawings

FIG. 1 is a schematic structural view of an online gas monitoring device for an unmanned aerial vehicle according to the technical solution of the present invention,

figure 2 is a schematic perspective view of a sampling head,

fig. 3 is a front view of fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

As shown in fig. 1, the online gas monitoring device for the unmanned aerial vehicle in the technical scheme of the invention comprises a monitoring box 1 installed on the unmanned aerial vehicle, a particulate matter detection device 6 and a sulfur dioxide detection device 7 are sequentially arranged in the monitoring box 1, and the rear part of the sulfur dioxide detection device 7 is connected with a nitrogen oxide detection device 8 and an ozone detection device 9 which are connected in parallel. The front part of the particulate matter detection device 6 is provided with an air storage chamber 4, an air inlet of the air storage chamber 4 is connected with a first air pump 3 and a sampling head 2, and the sampling head 2 extends out of the monitoring box 1 to realize sampling.

Based on above-mentioned technical scheme, set gradually particulate matter detection device 6 and sulfur dioxide detection device 7 to connect nitrogen oxide detection device 8 and ozone detection device 9 at sulfur dioxide detection device 7 rear portion, make the same gas that awaits measuring carry out particulate matter and sulfur dioxide content's detection through particulate matter detection device 6 and sulfur dioxide detection device 7 in proper order, the gas after sulfur dioxide content detects is divided into two, realizes the detection to nitrogen oxide and ozone respectively. Therefore, the detection of different substances in the same gas is effectively ensured, and the environment detection has comparability. Set up the gas receiver, realize preserving and keeping in the sample gas of drawing, a reverse side is ensured to obtain sufficient sample gas, and on the other hand reduces the gaseous air current of first air pump 3 transport for gaseous entering detection device that can be steady improves and detects the precision.

As shown in fig. 1, the outlet of the air reservoir 4 is connected to a third flow meter 5, and the rear of the third flow meter 5 is connected to the inlet of a particulate matter detection device 6. The third flow meter 5 is used to obtain the gas flow of the gas to be detected, which is detected by the intake particulate matter, and the gas flow entering the sulfur dioxide detection device 7.

An arc-shaped partition plate 41 is arranged in the air storage chamber 4, and the internal space of the air storage chamber 4 is divided into an air inlet area 44 and an air outlet area 45 by the partition plate 41, which are communicated with each other. The air inlet 42 and the air outlet 43 of the air reservoir 4 are arranged in an air inlet region 44 and an air outlet region 45, respectively. The air inlet 42 and the air outlet 43 of the air reservoir 4 cannot communicate linearly. The setting of baffle 41 and air inlet 42 and gas outlet 43 can not the straight line intercommunication, and effectual separation air current avoids the air current to directly get into gas outlet 43 by air inlet 42 and discharges, and the air current is quick, influences the detection precision. The baffle plate 41 is arc-shaped, so that the linear motion track of the airflow on the baffle plate 41 is changed, and the flow velocity of the airflow is further reduced.

As shown in fig. 1, 2 and 3, the sampling head 2 includes a sampling tube, the sampling tube includes a vertically disposed cylindrical main tube 21, two ends of the main tube 21 are open, a bottom opening 27 of the main tube 21 is communicated with an air inlet of the first air pump 3, and a top opening of the main tube 21 is an upper windward port 26. Go up the upwind mouth 26 and take a sample when unmanned aerial vehicle upwards flies, increase gaseous sample volume.

The side equipartition of house steward 21 is provided with a plurality of collateral branch pipes 22, and collateral branch pipe 22 slope sets up, and collateral branch pipe 22 sets up the direction and is unanimous with unmanned aerial vehicle flight direction. And a side windward port 23 is arranged on the windward side of the side branch pipe 22, and the side windward port 23 is communicated with the main pipe 21. The side windward port 23 performs gas sampling in the flight direction of the unmanned aerial vehicle, which is the same as the direction of the side branch pipe 22.

The main pipe 21 is further provided with a lower branch pipe 24 which is parallel to and communicated with the main pipe 21, the top of the lower branch pipe 24 is communicated with the main pipe 21, the bottom of the lower branch pipe 24 is provided with a lower windward port 25, and the lower windward port 25 is communicated with the main pipe 21. And the downward windward port 25 performs gas sampling when the unmanned aerial vehicle flies downward.

As shown in fig. 1, the particulate matter detecting device 6 includes a particulate matter detecting tank 61 and a detection passage 66 provided in the particulate matter detecting tank 61. Disposed within the detection channel 66 are a filter belt 64, a detection unit transmitter 62 and a detection unit receiver 63. The air inlet and the air outlet of the particle detection device 6 are respectively arranged at the end parts of the detection channels 66 at the two sides of the filter belt 64, and the air outlet of the particle detection device 6 is connected with a second air pump 65. The detecting unit emitter 62 and the detecting unit receiver 63 are respectively disposed in the detecting passage 66 at both sides of the filter belt 64, and the detecting unit receiver 63 is disposed adjacent to the second air pump 65. The outlet of the second air pump 65 is communicated with the sulfur dioxide detection device 7.

Based on the upper technical scheme, the detection principle of the particulate matter detection device is as follows: the gas to be detected enters the detection channel 66 from the gas storage chamber 4 under the suction action of the second air pump 65 and passes through the caterpillar band 64, particulate matters in the gas to be detected are intercepted by the filter band 64, and the gas finally enters the sulfur dioxide detection device 7 through the filter band 64. The detecting unit emitter 62 and the detecting unit receiver 63 are arranged right opposite to the part where the particles are intercepted on the filter belt 64, the detecting unit emitter 62 and the detecting unit receiver 63 are utilized to detect the amount of the particles on the filter belt 64, the content of the particles in the gas with a certain flow or volume is calculated out, and the detection of the particles is realized. In the detection of this particulate matter, it can not the loss to detect the tolerance, and can not change each composition and the composition in detecting the gas and account for the ratio, does benefit to and gets into sulfur dioxide detection device 7 through the detection gas that the particulate matter detected and continues the detection of sulfur dioxide.

The detecting unit emitter 62 and the detecting unit receiver 63 are respectively a beta-ray radiation source and a beta-ray receiving source, and the detecting principle is as follows: when the beta rays pass through a certain thickness of the absorbing substance, the intensity of the beta rays is gradually weakened along with the increase of the thickness of the absorbing substance, and beta absorption is generated.

As shown in fig. 1, the sulfur dioxide detecting device 7 includes a sulfur dioxide sealing detecting tube 75, and both ends of the sulfur dioxide sealing detecting tube 75 are respectively provided with an air inlet and an air outlet. The air outlet of the sulfur dioxide sealing detection tube 75 is connected with a third air pump 10. The sulfur dioxide seal detection tube 75 is provided with a first ultraviolet light generator 71 and a first ultraviolet light receiver 73 at two ends thereof, the first ultraviolet light generator 71 and the first ultraviolet light receiver 73 are respectively provided with a first optical filter 72 and a second optical filter 74 at front portions thereof, and the first ultraviolet light receiver 73 is connected with a first photomultiplier.

Based on the above technical scheme, the first ultraviolet light generator 71 emits ultraviolet light, the first optical filter 72 filters 213nm ultraviolet light and passes the ultraviolet light, the 213nm ultraviolet light is excited to 350nm ultraviolet light under the action of sulfur dioxide in gas, the second optical filter 74 passes the 350nm ultraviolet light and is received by the first photomultiplier, and the first photomultiplier converts the received optical signal into an electrical signal and outputs the electrical signal, so that the detection of sulfur dioxide is realized. In this detection, sulfur dioxide in the gas and ultraviolet light produce the effect to take place the transition, set up a room of keeping in the third air pump 10 rear portion, will pass through the detection gas that sulfur dioxide detected and get into the room of keeping in, keep in for the sulfur dioxide reverts to the ground state, even must detect the gas recovery, will keep in 11 interior gas of room and divide into two and pass through nitrogen oxide detection device 8 and ozone detection device 9 respectively through fourth air pump 12, improve the detection precision of nitrogen oxide and ozone.

As shown in fig. 1, a first branch pipe and a second branch pipe are connected to the rear portion of the sulfur dioxide detecting device 7, that is, the first branch pipe and the second branch pipe having the same diameter are connected to the rear portion of the fourth air pump 12. The first branch pipe and the second branch pipe are respectively connected with a nitrogen oxide detection device 8 and an ozone detection device 9, and a second flowmeter and a third flowmeter are respectively arranged on the first branch pipe and the second branch pipe. The gas flow rates entering the nitrogen oxide detection device 8 and the ozone detection device 9 are respectively measured by the second flow meter and the third flow meter.

As shown in fig. 1, the nitrogen oxide detection device 8 includes an oxidation filter cartridge 82 for oxidizing NO to NO2, a converter 84 for converting NO2 to NO is connected to the rear portion of the oxidation filter cartridge 82, a reaction chamber 85 is connected to the rear portion of the converter 84, an ozone generator 83 is connected to the reaction chamber 85, and a second photomultiplier 86 is connected to the reaction chamber 85. The NO is converted into NO2 under the action of ozone to consume ozone, the ozone consumption is judged by the second photomultiplier 86 through monitoring the ozone amount after reaction, and the nitrogen oxidation content is indirectly obtained, namely the content of nitrogen oxides in the gas to be detected is measured.

As shown in fig. 1, the ozone detecting device 9 includes an ozone detecting tube 91 hermetically disposed, and an air inlet and an air outlet are connected to the ozone detecting tube 91. An air inlet of the ozone detecting tube 91 is communicated with the second branch tube, a second ultraviolet light generator 94 and a second ultraviolet light receiver 92 are respectively arranged at two ends of the ozone detecting tube 91, and a third photomultiplier tube 93 is connected to the second ultraviolet light receiver 92. In the technical scheme, the detection principle of the ozone is as follows: ozone absorbs ultraviolet light, changes the concentration of the ultraviolet light, calculates the light intensity change through an ultraviolet light signal received by the third photomultiplier 93, converts the ultraviolet light signal into an electric signal through the third photomultiplier 93 and outputs the electric signal, and indirectly calculates the ozone concentration.

Among this technical scheme, be provided with the controller on the unmanned aerial vehicle, the controller includes central control module and with central control module signal connection's communication module, unmanned aerial vehicle control module and detection control module, have particulate matter detection device, sulfur dioxide detection device, nitrogen oxide detection device and ozone detection device to control by detecting control module.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.