Portable air quality detector and detection method

Abstract

The present invention relates to the technical field of air quality detection, and discloses a portable air quality detector and a detection method, comprising: a detection platform for analyzing collected gas samples, an aircraft arranged above the detection platform for moving to a location where sampling is required, arms connected to the four sides of the outer wall of the aircraft, and a propeller connected to one end of the arm, a sampling assembly arranged below the arm for sampling air samples, a positioning mechanism arranged on the top of the detection platform for fixing the aircraft, and by arranging the detection platform and the sampling assembly in a separate combination, the sampling assembly is driven to move by the aircraft to facilitate the collection of samples from different areas, and the collection in this way reduces the investment in labor costs, and for some narrow or high-altitude locations, the aircraft sampling and then returning to the detection platform for detection can greatly improve the scope of application.

Description

Technical Field

[0001] The present invention relates to the technical field of air quality detection, and in particular to a portable air quality detector and a detection method. Background Art

[0002] In order to better monitor air quality, my country has currently established many air quality monitoring stations, which use a variety of air quality detection equipment to understand the content of various substances in the air and promote the effective development of the air environment.

[0003] Chinese patent publication number CN104849407A discloses "a portable multifunctional air quality detector", including a sensor node system and a display alarm system connected to the sensor node system, and a remote data service center wirelessly connected to the sensor node system; the sensor node system includes a temperature sensor, a humidity sensor and a gas concentration sensor. The air quality detector of the present invention is easy to carry and is suitable for use in home environments and special environments; the air quality detector of the present invention adopts wireless communication technology to send the data collected by the sensor node to the remote data service center through wireless communication, and has the advantages of fast transmission speed, accurate detection and high sensitivity.

[0004] This scheme adopts the conventional fixed-point sampling method for air sampling detection. However, when using it, such as when detecting some gas transportation pipelines, if a leak occurs, it takes a certain amount of time for the gas to leak and diffuse, and the distance from the leak point will also affect the concentration of the gas in the air. This will result in a certain amount of time being wasted in confirming the exact leak location of the pipeline, and the leak point cannot be quickly confirmed for repair, which poses certain safety hazards. Therefore, a portable air quality detector and detection method are proposed to solve the above-mentioned problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a portable air quality detector and a detection method, which solves the problem that the detection results are not comprehensive enough due to fixed-point detection.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A portable air quality detector comprises: a detection platform for analyzing collected gas samples, an aircraft is arranged above the detection platform for moving to a location where sampling is required, arms are respectively connected to the four sides of the outer wall of the aircraft, and a propeller is connected to one end of the arm, a sampling assembly is arranged below the arm for sampling air samples, and a positioning mechanism is arranged on the top of the detection platform for fixing the aircraft, and the detection platform and the sampling assembly are arranged in a separate combination, and the sampling assembly is driven to move by the aircraft to facilitate the collection of samples from different areas. The collection in this way reduces the investment in labor costs, and for some narrow or high locations where it is inconvenient for personnel to place sensors, the aircraft can be used to sample and then return to the detection platform for detection, which can greatly improve its scope of application.

[0008] Preferably, the sampling assembly includes a guide ring groove, a collecting box, and a connecting tube. The guide ring groove is connected to the bottom of the propeller, the collecting box is connected to the bottom of the aircraft arm, and the connecting tube is connected to a position between the guide ring groove and the collecting box. When the aircraft is hovering, the rotation of the propeller squeezes the airflow, which is guided through the guide ring groove and enters the collecting box from the connecting tube to complete the sampling.

[0009] Preferably, the outer wall of the connecting tube is connected to a solenoid valve for controlling the opening and closing of the connecting tube, so that after the aircraft moves to the sampling location, the solenoid valve can be opened to connect the guide ring groove with the collection box, and then sampling can be performed to achieve the purpose of fixed-point sampling.

[0010] Preferably, an injection cavity is provided at the bottom of the collection box, and a row of collection cavities is provided above the collection box, the injection cavity is connected with the connecting tube, and the collection cavity is connected with the injection cavity through the injection hole. After the airflow enters the collection box, it will preferentially enter the interior of the injection cavity and inject air into the airbag through the injection hole.

[0011] Preferably, the inner wall of the gas injection hole is connected to a one-way valve, the inner wall of the collecting chamber is provided with an airbag, and the airbag is connected to the gas injection hole, the outer wall of the airbag is connected to an air injection tube, and the air injection tube extends to the lower part of the outside of the collecting box, and the collecting box is provided with exhaust grooves on both sides of the collecting chamber. During the expansion of the airbag, the airbag will gradually fill the collecting chamber, and the gas in the collecting chamber will be discharged from the exhaust grooves.

[0012] Preferably, the inner wall of the gas injection cavity is slidably connected with a magnetic slider, and the outer wall of the collection box is located on both sides of the gas injection cavity and is respectively connected with magnetic limit blocks, and the magnetic limit blocks and the gas injection holes are staggered. The incoming airflow will squeeze the magnetic slider to slide and expose the gas injection holes, and the magnetic slider will stop when it slides to the position of the first group of magnetic limit blocks, so as to ensure that gas can be continuously injected into the airbag for collection until the airbag expands and fills the collection cavity and cannot expand. The subsequently injected gas will continue to accommodate more gas because the airbag cannot expand, and the injected gas will squeeze the magnetic slider at this time. The magnetic slider is disengaged from the magnetic attraction of the first group of magnetic limit blocks, and continues to move backward to expose a new air injection hole and then inject air into the new airbag, and repeats this process until all the airbags are filled. In this process, a one-way valve is provided to effectively prevent the gas in the airbag from flowing back. A magnetic reset block is adsorbed on the bottom of the collection box. By providing the magnetic reset block, the magnetic reset block can be pushed during each sampling, and the magnetic slider is reset by the magnetic force of the magnetic reset block. It is worth noting that the magnetic force of the magnetic reset block on the magnetic slider is greater than the magnetic force of the magnetic limit block on the magnetic slider.

[0013] Preferably, the outer wall of the air injection tube is slidably connected with a sealing sleeve, the bottom of the inner wall of the sealing sleeve is provided with an annular groove, connecting holes are provided on both sides of the tube wall of the air injection tube, and the air injection tube is sealed, the outer wall of the air injection tube is connected with a support ring, a spring is connected to the position between the support ring and the sealing sleeve, and the spring movable sleeve is arranged on the outer wall of the air injection tube, so that the air injection tube and the air connecting tube are aligned and pressed downward during the descent of the aircraft, and the extrusion force generated when the air injection tube contacts the air connecting tube makes the sealing sleeve move up and compress the spring, so that the connecting hole is connected with the annular groove, and at this time, due to the elasticity of the airbag itself, the gas stored inside will be squeezed into the interior of the air connecting tube, so as to facilitate the sensor below the air connecting tube to detect and analyze the air.

[0014] Preferably, positions on the top of the testing platform corresponding to the air injection pipes are respectively connected to air connecting pipes, and the air connecting pipes extend to the interior of the testing platform, positions inside the testing platform corresponding to the air connecting pipes are connected to sensors for detecting air, one side of the testing platform is connected to a control handle via a snap-fit ​​for controlling the aircraft, and the testing platform is connected to a control panel.

[0015] Preferably, the positioning mechanism includes a landing and taking-off platform, which is connected to the top of the inspection platform, and the top of the inspection platform is connected to arc-shaped plates at positions around the landing and taking-off platform, and the top of the arc-shaped plates is arranged as an inclined surface. The top of the landing and taking-off platform is connected to a magnetic positioning block, and the bottom of the aircraft is connected to a magnetic adsorption block. When the aircraft returns to the top of the inspection platform, it is guided by the inclined surface on the top of the arc-shaped plate so that the aircraft descends vertically. When it descends to the height of magnetic interaction between the magnetic positioning block and the magnetic adsorption block, the aircraft is magnetically adsorbed on the top of the landing and taking-off platform through the effect of magnetic attraction. Moreover, since the magnetic positioning block and the magnetic adsorption block are arranged in a cross shape, the magnetic positioning block and the magnetic adsorption block can be magnetically adsorbed and fixed while also playing a positioning role.

[0016] The following steps are involved:

[0017] Step 1: Prepare for sampling. Push the magnetic reset block by hand to move the collection box to a position close to the connecting tube, so that the magnetic reset block can pull the magnetic slider back to a position close to the connecting tube by magnetic force when it moves, so as to facilitate the subsequent injection of airbags. Then, control the aircraft to take off and move to the place where sampling is required, hover and prepare for sampling by controlling the control handle.

[0018] Step 2: Start sampling. After the aircraft moves to the sampling location, open the solenoid valve to connect the guide ring groove with the collection box. When the aircraft is hovering, the rotation of the propeller squeezes the airflow, which is guided by the guide ring groove and enters the collection box from the connecting pipe, thus completing the sampling.

[0019] Step three: sample classification. After the airflow enters the collection box, it will first enter the interior of the air injection cavity. The injected airflow will squeeze the magnetic slider to slide and expose the air injection hole. At this time, air will be injected into the airbag through the air injection hole, and the magnetic slider will stop when it slides to the position of the first group of magnetic limit blocks to ensure that the gas can be continuously injected into the airbag for collection, so that the airbag begins to expand. During the expansion process, the airbag will gradually fill the collection cavity, and the gas in the collection cavity will be discharged from the exhaust groove until the airbag is expanded and filled. When the collection cavity cannot expand, the subsequent injected gas will continue to accommodate more gas because the airbag cannot expand. At this time, the injected gas will squeeze the magnetic slider, causing it to break away from the magnetic attraction of the first group of magnetic limit blocks and continue to move backward, exposing a new air injection hole and then injecting air into the new airbag, and repeating in sequence until all the airbags are filled. In this process, a one-way valve can be set to effectively prevent the gas in the airbag from flowing back, and the solenoid valve can be used to control whether to continue sampling during the sampling process;

[0020] Step 4: Sample recovery: Use the control handle to control the aircraft back to the top of the test platform, and guide it through the inclined surface on the top of the arc plate to make the aircraft descend vertically. When it descends to the height where the magnetic positioning block and the magnetic adsorption block interact with each other, the aircraft is magnetically adsorbed above the take-off and landing platform through the effect of magnetic attraction. Because the magnetic positioning block and the magnetic adsorption block are arranged in a cross shape, the magnetic positioning block and the magnetic adsorption block can not only be magnetically adsorbed and fixed, but also play a positioning role.

[0021] Step 5. Test the sample. Under the action of the magnetic attraction of the magnetic positioning block and the magnetic adsorption block, the process of the aircraft descending drives the air injection pipe and the air connecting pipe to be aligned and pressed down. When the air injection pipe contacts the air connecting pipe, the extrusion force generated causes the sealing sleeve to move up and compress the spring, so that the connecting hole is connected with the annular groove. At this time, due to the elasticity of the airbag itself, the gas stored inside will be squeezed into the interior of the air connecting pipe, so that the sensor below the air connecting pipe can detect and analyze the air. The detection and analysis information is displayed on the control panel to facilitate the staff to check and make judgments.

[0022] Compared with the prior art, the present invention provides a portable air quality detector and detection method, which have the following beneficial effects:

[0023] 1. The portable air quality detector and detection method, by setting the detection table and the sampling component in a separate combination, and using an aircraft to drive the sampling component to move, facilitates the collection of samples from different areas. This method reduces the investment in labor costs, and for some narrow or high locations where it is inconvenient for personnel to place sensors, the scope of application can be greatly improved by returning the sampling by aircraft to the detection table for detection.

[0024] 2. The portable air quality detector and detection method completes sampling by using the rotation of the propeller to squeeze the airflow when the aircraft is hovering, and the airflow is guided from the connecting pipe into the collection box through the guide ring groove. After the airflow enters the collection box, it will first enter the interior of the air injection cavity and inject air into the airbag through the air injection hole.

[0025] 3. The portable air quality detector and detection method, after the airflow enters the collection box, it will first enter the interior of the air injection cavity, and the injected airflow will squeeze the magnetic slider to slide and expose the air injection hole. At this time, air will be injected into the airbag through the air injection hole, and the magnetic slider will stop when it slides to the position of the first group of magnetic limit blocks to ensure that the gas can be continuously injected into the airbag for collection, so that the airbag begins to expand. During the expansion process, the airbag will gradually fill the collection cavity, and the gas in the collection cavity will be discharged from the exhaust groove until the airbag expands and fills the collection cavity and cannot expand. The subsequent injected gas will continue to accommodate more gas because the airbag cannot expand. At this time, the injected gas will squeeze the magnetic slider, causing it to break away from the magnetic attraction of the first group of magnetic limit blocks and continue to move backward, exposing a new air injection hole and then injecting air into the new airbag, and repeating in sequence until all the airbags are filled. Through such collection method, the purpose of classified sampling is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the aircraft in the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the sampling component in the present invention;

[0029] Figure 4 For the present invention Figure 1 A magnified view;

[0030] Figure 5 It is a partial cross-sectional view of the collecting box in the present invention;

[0031] Figure 6 A partial cross-sectional view of the gas injection pipe of the present invention;

[0032] Figure 7 It is a connection diagram between the detection platform and the positioning mechanism in the present invention.

[0033] In the figure: 1. Testing table; 11. Control panel; 12. Control handle; 13. Air pipe;

[0034] 2. Aircraft; 21. Arm; 22. Propeller;

[0035] 3. Sampling assembly; 31. Guide ring groove; 32. Collection box; 321. Air injection cavity; 322. Collection cavity; 323. Air bag; 324. Air injection hole; 325. Magnetic slider; 326. Magnetic reset block; 327. Magnetic limit block; 328. Exhaust groove; 329. Air injection pipe; 3291. Sealing sleeve; 3292. Annular groove; 3293. Connecting hole; 3295. Support ring; 3296. Spring; 33. Connecting pipe; 34. Solenoid valve;

[0036] 4. Positioning mechanism; 41. Lifting and lowering platform; 42. Arc plate; 43. Magnetic positioning block; 44. Magnetic adsorption block. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 A portable air quality detector comprises: a detection platform 1 for analyzing the collected gas samples; an aircraft 2 is arranged above the detection platform 1 for moving to a location where sampling is required; arms 21 are connected to the four sides of the outer wall of the aircraft 2, and a propeller 22 is connected to one end of the arm 21; a sampling assembly 3 is arranged below the arm 21 for sampling air samples; a positioning mechanism 4 is arranged on the top of the detection platform 1 for fixing the aircraft 2; by arranging the detection platform 1 and the sampling assembly 3 in a separate combination mode, the sampling assembly 3 is driven to move by the aircraft 2 to facilitate the collection of samples in different areas; the collection in this way reduces the investment in labor costs, and for some narrow or high-altitude locations where it is inconvenient for personnel to place sensors, it can also be done by The method in which the aircraft 2 returns to the detection platform 1 for detection after sampling can greatly improve its scope of application. The sampling component 3 includes a guide ring groove 31, a collection box 32, and a connecting tube 33. The guide ring groove 31 is connected to the bottom of the propeller 22, the collection box 32 is connected to the bottom of the arm 21, and the connecting tube 33 is connected to the position between the guide ring groove 31 and the collection box 32. When the aircraft 2 is hovering, the rotation of the propeller 22 squeezes the airflow, so that part of the airflow is guided through the guide ring groove 31 and enters the collection box 32 from the connecting tube 33 to complete the sampling. The outer wall of the connecting tube 33 is connected to the electromagnetic valve 34 for controlling the opening and closing of the connecting tube 33, so that the aircraft 2 can open the electromagnetic valve 34 after moving to the sampling location to connect the guide ring groove 31 with the collection box 32, and then take samples to achieve the purpose of fixed-point sampling.

[0039] In this embodiment, the detection table 1 and the sampling component 3 are arranged in a separate combination, and the sampling component 3 is driven to move by the aircraft 2 to facilitate the collection of samples in different areas. This method reduces the investment in labor costs, and for some narrow or high locations where it is inconvenient for personnel to place sensors, the aircraft 2 can also return to the detection table 1 for detection after sampling, which can greatly improve its scope of application. After the aircraft 2 moves to the sampling location, the solenoid valve 34 is opened to connect the guide ring groove 31 with the collection box 32. When the aircraft 2 is hovering, the rotation of the propeller 22 squeezes the airflow, which is guided by the guide ring groove 31 and enters the collection box 32 from the connecting pipe 33 to complete the sampling.

[0040] Example 2: Please refer to Figure 5The collecting box 32 is provided with an injection cavity 321 at the bottom, and a row of collecting cavities 322 are provided at the position above the injection cavity 321 of the collecting box 32, the injection cavity 321 is communicated with the connecting tube 33, and the collecting cavity 322 is communicated with the injection cavity 321 through the injection hole 324. After the airflow enters the collecting box 32, it will preferentially enter the interior of the injection cavity 321, and the inner wall of the injection hole 324 is connected with a one-way valve, and the inner wall of the collecting cavity 322 is provided with an air bag 323, and the air bag 323 is communicated with the injection hole 324, and the outer wall of the air bag 323 is connected with an injection pipe 329, and the injection pipe 329 extends to the collecting box 32. At the lower part of the outside of the collecting box 32, the collecting box 32 is provided with exhaust grooves 328 at the positions on both sides of the collecting chamber 322. During the expansion of the airbag 323, the airbag 323 will gradually fill the collecting chamber 322, and the gas in the collecting chamber 322 will be discharged from the exhaust grooves 328. The inner wall of the air chamber 321 is slidably connected with a magnetic slider 325. The outer wall of the collecting box 32 is located on both sides of the gas injection chamber 321 and is respectively connected with magnetic limit blocks 327. The positions of the magnetic limit blocks 327 and the gas injection holes 324 are staggered. The airflow entering the gas injection chamber 321 will squeeze the magnetic slider 325 to slide out. The gas injection hole 324 will inject gas into the airbag 323 at this time, and the magnetic slider 325 will stop when it slides to the position of the first group of magnetic limit blocks 327 to ensure that the gas can be continuously injected into the airbag 323 for collection until the airbag 323 expands to fill the collection chamber 322 and cannot expand. The subsequent injected gas will continue to accommodate more gas because the airbag 323 cannot expand. At this time, the injected gas will squeeze the magnetic slider 325, causing it to break away from the magnetic attraction of the first group of magnetic limit blocks 327 and continue to move backward to expose new gas injection The hole 324 then injects air into the new airbag 323, and repeats this process until all the airbags 323 are filled. In this process, a one-way valve is provided to effectively prevent the gas in the airbag 323 from flowing back. A magnetic reset block 326 is adsorbed on the bottom of the collection box 32. By providing the magnetic reset block 326, the magnetic reset block 326 can be pushed during each sampling, and the magnetic reset block 326 magnetically pulls the magnetic slider 325 to reset it. It is worth mentioning that the magnetic force of the magnetic reset block 326 acting on the magnetic slider 325 is greater than the magnetic force of the magnetic limit block 327 acting on the magnetic slider 325.

[0041] In this embodiment, after the airflow enters the collection box 32, it will first enter the interior of the gas injection cavity 321. The injected airflow will squeeze the magnetic slider 325 to slide and expose the gas injection hole 324. At this time, gas will be injected into the airbag 323 through the gas injection hole 324, and the magnetic slider 325 will stop when it slides to the position of the first group of magnetic limit blocks 327 to ensure that the gas can continue to be injected into the airbag 323 for collection, so that the airbag 323 begins to expand. During the expansion process, the airbag 323 will gradually fill the collection cavity 322, and the gas in the collection cavity 322 will be discharged from the exhaust groove 328 until it is injected into the airbag 323. When 323 expands to fill the collection chamber 322 and cannot expand anymore, the subsequently injected gas will continue to accommodate more gas because the airbag 323 cannot expand. At this time, the injected gas will squeeze the magnetic slider 325, causing it to break away from the magnetic attraction of the first group of magnetic limit blocks 327 and continue to move backward, exposing a new gas injection hole 324 and then inject gas into the new airbag 323, and repeat this process until all the airbags 323 are filled. In this process, a one-way valve can be set to effectively prevent the gas in the airbag 323 from flowing back, and during the sampling process, the solenoid valve 34 can be used to control whether to continue sampling.

[0042] Example 3: Please refer to Figure 6 , Figure 7The outer wall of the gas injection pipe 329 is slidably connected with a sealing sleeve 3291, and an annular groove 3292 is provided at the bottom of the inner wall of the sealing sleeve 3291. Connecting holes 3293 are provided on both sides of the pipe wall of the gas injection pipe 329, and the gas injection pipe 329 is sealed. The outer wall of the gas injection pipe 329 is connected with a support ring 3295, and a spring 3296 is connected between the support ring 3295 and the sealing sleeve 3291, and the spring 3296 is movably sleeved on the outer wall of the gas injection pipe 329, so that the process of the aircraft 2 descending drives the gas injection pipe 329 and the gas connection pipe 1 3 is aligned and pressed down. When the gas injection pipe 329 contacts the gas connection pipe 13, the extrusion force generated causes the sealing sleeve 3291 to move upward and compress the spring 3296, so that the connecting hole 3293 is connected with the annular groove 3292. At this time, due to the elasticity of the airbag 323 itself, the gas stored inside will be squeezed into the inside of the gas connection pipe 13, so that the sensor below the gas connection pipe 13 can detect and analyze the air. The positions on the top of the test bench 1 corresponding to the gas injection pipe 329 are respectively connected to the gas connection pipe 13, and the gas connection pipe 13 extends to the inside of the test bench 1. The positions of the internal parts of the test platform 1 corresponding to the air pipe 13 are connected with sensors for detecting air. A control handle 12 is connected to one side of the test platform 1 through a buckle for controlling the aircraft 2. The test platform 1 is connected with a control panel 11. The positioning mechanism 4 includes a landing platform 41, which is connected to the top of the test platform 1. The positions of the landing platform 41 on the top of the test platform 1 are respectively connected with arc plates 42, and the top of the arc plates 42 is set as an inclined surface. The top of the landing platform 41 is connected with a magnetic positioning block 43, and the bottom of the aircraft 2 is connected with The magnetic adsorption block 44 allows the aircraft 2 to return to the top of the inspection platform 1 and is guided by the inclined surface on the top of the arc plate 42, so that the aircraft 2 descends vertically. When it descends to the height where the magnetic positioning block 43 and the magnetic adsorption block 44 interact with each other, the aircraft 2 is magnetically adsorbed above the landing platform 41 through the effect of magnetic attraction. Since the magnetic positioning block 43 and the magnetic adsorption block 44 are arranged in a cross shape, the magnetic positioning block 43 and the magnetic adsorption block 44 can not only be magnetically adsorbed and fixed, but also play a positioning role.

[0043] In this embodiment, under the action of the magnetic attraction of the magnetic positioning block 43 and the magnetic adsorption block 44, the process of the aircraft 2 descending drives the air injection pipe 329 to align with the air connecting pipe 13 and press down. When the air injection pipe 329 contacts the air connecting pipe 13, the extrusion force generated causes the sealing sleeve 3291 to move up and compress the spring 3296, so that the connecting hole 3293 is connected with the annular groove 3292. At this time, due to the elasticity of the airbag 323 itself, the gas stored inside will be squeezed into the interior of the air connecting pipe 13, so as to facilitate the sensor below the air connecting pipe 13 to detect and analyze the air.

[0044] Example 4: Please refer to Figure 1 - Figure 7 , including the following steps:

[0045] Step 1: Prepare for sampling. Push the magnetic reset block 326 by hand to move the collection box 32 to a position close to the connecting tube 33, so that the magnetic reset block 326 pulls the magnetic slider 325 back to a position close to the connecting tube 33 by magnetic force when moving, so as to facilitate the subsequent injection of gas into the airbag 323. Then, control the aircraft 2 to take off and move to the place where sampling is required, hover and prepare for sampling by controlling the control handle 12.

[0046] Step 2: Start sampling. After the aircraft 2 moves to the sampling location, the solenoid valve 34 is opened to connect the guide ring groove 31 with the collection box 32. When the aircraft 2 is hovering, the rotation of the propeller 22 squeezes the airflow, which is guided by the guide ring groove 31 and enters the collection box 32 from the connecting pipe 33, thus completing the sampling.

[0047] Step 3: Sample classification. After the airflow enters the collection box 32, it will first enter the interior of the gas injection cavity 321. The injected airflow will squeeze the magnetic slider 325 to slide and expose the gas injection hole 324. At this time, gas will be injected into the airbag 323 through the gas injection hole 324, and the magnetic slider 325 will stop when it slides to the position of the first group of magnetic limit blocks 327 to ensure that the gas can continue to be injected into the airbag 323 for collection, so that the airbag 323 begins to expand. During the expansion process, the airbag 323 will gradually fill the collection cavity 322, and the original gas in the collection cavity 322 will be discharged from the exhaust groove 328 until it is discharged to the airbag 323. When the airbag 323 expands and fills the collection chamber 322 and cannot expand, the subsequently injected gas will continue to accommodate more gas because the airbag 323 cannot expand. At this time, the injected gas will squeeze the magnetic slider 325, causing it to break away from the magnetic attraction of the first group of magnetic limit blocks 327 and continue to move backward, exposing a new gas injection hole 324 and then injecting gas into the new airbag 323, and repeating this process until all the airbags 323 are filled. In this process, the one-way valve can be set to effectively prevent the gas in the airbag 323 from flowing back, and the solenoid valve 34 can be used to control whether to continue sampling during the sampling process;

[0048] Step 4, sample recovery, control the aircraft 2 back to the top of the detection platform 1 through the control handle 12, and guide it through the inclined surface on the top of the arc plate 42 to make the aircraft 2 descend vertically. When it descends to the height where the magnetic positioning block 43 and the magnetic adsorption block 44 interact with each other, the aircraft 2 is magnetically adsorbed on the top of the landing platform 41 through the effect of magnetic attraction. Because the magnetic positioning block 43 and the magnetic adsorption block 44 are arranged in a cross shape, the magnetic positioning block 43 and the magnetic adsorption block 44 can not only be magnetically adsorbed and fixed, but also play a positioning role.

[0049] Step 5, test the sample. Under the action of the magnetic attraction of the magnetic positioning block 43 and the magnetic adsorption block 44, the process of the aircraft 2 descending drives the air injection pipe 329 to align with the air connecting pipe 13 and press down. When the air injection pipe 329 contacts the air connecting pipe 13, the extrusion force generated causes the sealing sleeve 3291 to move up and compress the spring 3296, so that the connecting hole 3293 is connected with the annular groove 3292. At this time, due to the elasticity of the airbag 323 itself, the gas stored inside will be squeezed into the interior of the air connecting pipe 13, so that the sensor below the air connecting pipe 13 can detect and analyze the air. The detection and analysis information is displayed on the control panel 11 to facilitate the staff to check and make judgments.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A portable air quality detector, characterized in that: include: A detection station (1) for analyzing the collected gas samples; An aircraft (2) is arranged above the detection platform (1) and is used to move to a location where sampling is required; Arms (21) are connected to the four sides of the outer wall of the aircraft (2), and one end of the arm (21) is connected to a propeller (22); A sampling assembly (3) is provided below the machine arm (21) for sampling air samples; A positioning mechanism (4) is provided on the top of the testing platform (1) for fixing the aircraft (2); The sampling assembly (3) comprises a guide ring groove (31), a collection box (32), and a connecting tube (33); the guide ring groove (31) is connected to the bottom of the propeller (22); the collection box (32) is connected to the bottom of the machine arm (21); and the connecting tube (33) is connected to a position between the guide ring groove (31) and the collection box (32); The collecting box (32) is provided with an air injection cavity (321) at the bottom, and a row of collecting cavities (322) is provided at a position above the air injection cavity (321) of the collecting box (32), the air injection cavity (321) is communicated with the connecting pipe (33), and the collecting cavity (322) is communicated with the air injection cavity (321) via the air injection hole (324); The inner wall of the gas injection hole (324) is connected to a one-way valve, the inner wall of the collection chamber (322) is provided with an air bag (323), and the air bag (323) is in communication with the gas injection hole (324), the outer wall of the air bag (323) is connected to an air injection pipe (329), and the air injection pipe (329) extends to the lower part of the outside of the collection box (32), and the collection box (32) is provided with exhaust grooves (328) at positions on both sides of the collection chamber (322); The inner wall of the gas injection cavity (321) is slidably connected to a magnetic slider (325), the outer wall of the collection box (32) is located on both sides of the gas injection cavity (321) and is respectively connected to magnetic limit blocks (327), and the positions of the magnetic limit blocks (327) and the gas injection holes (324) are staggered, and the bottom of the collection box (32) is adsorbed with a magnetic reset block (326).

2. A portable air quality detector according to claim 1, characterized in that: The outer wall of the gas injection pipe (329) is slidably connected to a sealing sleeve (3291), the inner wall bottom of the sealing sleeve (3291) is provided with an annular groove (3292), the pipe wall of the gas injection pipe (329) is provided with connecting holes (3293) on both sides, and the gas injection pipe (329) is sealed, the outer wall of the gas injection pipe (329) is connected to a support ring (3295), the position between the support ring (3295) and the sealing sleeve (3291) is connected to a spring (3296), and the spring (3296) is movably sleeved on the outer wall of the gas injection pipe (329).

3. A portable air quality detector according to claim 2, characterized in that: The outer wall of the connecting pipe (33) is connected to a solenoid valve (34) for controlling the opening and closing of the connecting pipe (33).

4. A portable air quality detector according to claim 3, characterized in that: Positions on the top of the test platform (1) corresponding to the air injection pipe (329) are respectively connected to air connection pipes (13), and the air connection pipes (13) extend into the interior of the test platform (1). Positions inside the test platform (1) corresponding to the air connection pipes (13) are all connected to sensors for detecting air. A control handle (12) is connected to one side of the test platform (1) via a buckle for controlling the aircraft (2). The test platform (1) is connected to a control panel (11).

5. A portable air quality detector according to claim 4, characterized in that: The positioning mechanism (4) comprises a take-off and landing platform (41), the take-off and landing platform (41) being connected to the top of the detection platform (1), the top of the detection platform (1) being connected to arc-shaped plates (42) at positions around the take-off and landing platform (41), and the top of the arc-shaped plates (42) being arranged as an inclined surface, the top of the take-off and landing platform (41) being connected to a magnetic positioning block (43), and the bottom of the aircraft (2) being connected to a magnetic adsorption block (44).

6. A detection method of a portable air quality detector, applied to the portable air quality detector according to claim 5, characterized in that: The following steps are involved: Step 1, sampling preparation, by manually pushing the magnetic reset block (326) to move to a position of the collection box (32) close to the connecting tube (33), so that when the magnetic reset block (326) moves, the magnetic slider (325) is pulled back to a position close to the connecting tube (33) by magnetic force, so as to facilitate the subsequent injection of gas into the airbag (323), and then the control handle (12) is used to control the aircraft (2) to take off and move to a place where sampling is required, and hover to prepare for sampling; Step 2, start sampling. After the aircraft (2) moves to the sampling location, the solenoid valve (34) is opened to connect the guide ring groove (31) with the collection box (32). When the aircraft (2) is hovering, the rotation of the propeller (22) squeezes the airflow, which is guided through the guide ring groove (31) and enters the collection box (32) from the connecting pipe (33), thus completing the sampling. Step 3: Sample classification. After the airflow enters the collection box (32), it will first enter the interior of the gas injection cavity (321). The injected airflow will squeeze the magnetic slider (325) to slide and expose the gas injection hole (324). At this time, gas will be injected into the airbag (323) through the gas injection hole (324). The magnetic slider (325) will stop when it slides to the position of the first set of magnetic limit blocks (327) to ensure that gas can continue to be injected into the airbag (323) for collection, so that the airbag (323) begins to expand. During the expansion process, the airbag (323) will gradually fill the collection cavity (322), and the gas in the collection cavity (322) will be discharged from the exhaust groove (328). , until the airbag (323) is expanded to fill the collection chamber (322) and cannot expand anymore, the subsequently injected gas will continue to accommodate more gas because the airbag (323) cannot expand. At this time, the injected gas will squeeze the magnetic slider (325), causing it to break away from the magnetic attraction of the first set of magnetic limit blocks (327) and continue to move backward, exposing a new gas injection hole (324) and then injecting gas into the new airbag (323), and repeating this process until all the airbags (323) are filled. In this process, a one-way valve can be provided to effectively prevent the gas in the airbag (323) from flowing back, and during the sampling process, the solenoid valve (34) can be used to control whether to continue sampling; Step 4, sample recovery, the aircraft (2) is controlled by the control handle (12) to return to the top of the detection platform (1), and the aircraft (2) is guided by the inclined surface at the top of the arc plate (42) so that the aircraft (2) descends vertically. When it descends to a height where the magnetic forces of the magnetic positioning block (43) and the magnetic adsorption block (44) interact with each other, the aircraft (2) is magnetically adsorbed on the top of the landing platform (41) by the effect of magnetic attraction. Since the magnetic positioning block (43) and the magnetic adsorption block (44) are arranged in a cross shape, the magnetic positioning block (43) and the magnetic adsorption block (44) can be fixed by magnetic adsorption and can also play a positioning role; Step 5, testing the sample. Under the action of the magnetic attraction of the magnetic positioning block (43) and the magnetic adsorption block (44), the process of the aircraft (2) descending drives the air injection pipe (329) to align with the air connection pipe (13) and press down. When the air injection pipe (329) contacts the air connection pipe (13), the extrusion force generated causes the sealing sleeve (3291) to move upward and compress the spring (3296), so that the connecting hole (3293) and the annular groove (3292) are connected. At this time, due to the elasticity of the airbag (323) itself, the gas stored inside will be squeezed into the inside of the air connection pipe (13), so that the sensor below the air connection pipe (13) can detect and analyze the air. The detection and analysis information is displayed on the control panel (11) to facilitate the staff to check and make judgments.

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