Atmospheric composition detector

Abstract

The invention relates to an atmospheric composition detector which is characterized in that under the excitation of detection gas molecules in an ionization inner space by an ultraviolet light generator in a gas sensor module, pollutant detection gas molecules in the ionization inner space are ionized into charged particles, and the charged particles can be detected by a signal detection part; under the action of the air pump, air can continuously enter the gas sensor module to be detected, the stable state of the air pressure of the air entering the gas sensor module is guaranteed, the air entering the gas channel of the sensor module can be discharged only after passing through the ionization inner space, more air participates in the ionization process, and the ionization efficiency is improved. Compared with the prior art, the method has the advantages that the scale of charged particles is increased, the semaphore is larger, and the signal-to-noise ratio is better under the condition that the ground noise is kept unchanged, so that more effective detection sensitivity is provided, the method better conforms to the external air concentration, stable air pressure ensures that ionized signals cannot deviate from the actual pollutant concentration condition due to air pressure fluctuation, and the detection quality is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of atmosphere detection, and in particular to an atmosphere component detector. Background Art

[0002] At present, the existing air composition detector products can be divided into two types of application: fixed stations and mobile stations according to different application scenarios. Among them, mobile stations can be subdivided into a variety of application scenarios according to the different displacement load platforms. The performance and corresponding usage methods of special equipment in various mobile application scenarios are not the same, and the functions and applicable application scenarios are relatively single. In the process of use, there are complicated deployment and inconsistent information standards, which is not conducive to the unified storage and analysis of data.

[0003] It is difficult to build a digital and intelligent workflow by simply transporting, carrying or collecting samples. With the rapid development of intelligent drone technology, large-scale data collection equipment such as air composition detectors can complete tasks more efficiently and safely by combining with drone technology, thereby optimizing efficiency, safety, reliability and cost reduction.

[0004] The following problems exist in the existing air composition data collection and analysis work:

[0005] 1. Low deployment efficiency: Currently, different devices are used in different application scenarios. Personnel need to master the usage methods and technical essentials of multiple devices. Using unified equipment can reduce the learning cost of personnel, reduce the probability of errors, and reduce the difficulty of maintenance, thereby improving deployment efficiency.

[0006] 2. The equipment is too large and heavy: At present, the air composition detection equipment that has the ability to collect accurate data and transmit data in real time weighs from a few kilograms to hundreds of kilograms. The transportation and installation costs of the equipment are high. Overweight equipment also places extremely high demands on the mounting performance of drones, which greatly reduces the practicality of collaborative work. By making the equipment smaller and lighter, the scope of application and collaborative performance of the equipment can be greatly improved.

[0007] 3. Inconsistent data standards: Using multiple devices to collect data in different application scenarios makes the original data disorganized and the data formats are also different. In this case, manual intervention is required to organize the data. Only through orderly organization and calibration calculation can an orderly and unified data set be obtained, which makes the statistics, management and analysis of the data inefficient and costly. Unified calibration equipment and unified data formats will help optimize the data processing process.

[0008] 4. Weak data communication capability: Equipment deployed on mobile platforms (such as vehicle-mounted, personal portable, and aircraft-mounted) usually records data on the device first, retrieves the data, and then manually distributes it to each unit in need, resulting in poor timeliness of data and requiring manual participation in data collation and storage. Integrating continuous and reliable wireless communication functions into the product can satisfy the need for remote real-time data presentation. Data is synchronously stored in a remote terminal or designated data center without the need for additional manual operations.

[0009] 5. Insufficient data integrity: The information recorded by a single air composition data collection device cannot fully describe the facts of "who? what time? where? how?" Integrate the spatial perception function into the product, and bind and store the spatial location information and real-time sensor readings so that the data has complete object attributes.

[0010] 6. Expansion of the collection range: In the past, air composition detectors were carried by individuals or mounted on vehicles to collect data within the target range during movement. The movement of vehicles and individuals on the ground is limited by roads and various complex ground conditions. By adapting the equipment and working together with drones, not only will it not be limited by road and ground conditions, but data collection can be extended away from the ground and to the height space, and the data collection points will be evenly distributed in three-dimensional space.

[0011] The Chinese patent application with publication number CN114280246A discloses an air composition monitor that can be used in a variety of application scenarios. It solves the above six problems to a certain extent. However, its sensor is arranged on the side of the main airway, and the gas enters the sensor for detection mainly by diffusion, which makes the sensor less sensitive, thereby affecting the detection accuracy, effectiveness and quality. Summary of the invention

[0012] The purpose of the present invention is to overcome the shortcomings of the air composition monitor in the prior art, which has low detection sensitivity and thus affects the detection quality, and to provide an atmosphere composition detector.

[0013] The present invention provides an atmospheric composition detector, comprising

[0014] A detector housing, wherein the detector housing has a detector air inlet and a detector air outlet;

[0015] A gas sensor module, wherein the gas sensor module is arranged in the housing of the detector, and the gas sensor module has a sensor module airway, an ionization inner space, an ultraviolet light generator and a signal detection unit inside the gas sensor module; the ionization inner space is used to connect the sensor module air inlet and the sensor module air outlet of the sensor module airway, so that gas molecules can flow from the air inlet end of the sensor module airway through the ionization inner space to the air outlet end of the sensor module airway; the ultraviolet light generator can provide energy for the gas molecules in the ionization inner space, so that the gas molecules in the ionization inner space can be ionized, and the signal detection unit is used to detect the ionization signal of the gas molecules in the ionization inner space;

[0016] An air pump, wherein the air pump is disposed in a housing of the detector;

[0017] A first air passage, wherein the first air passage is disposed in the detector housing, and the first air passage is connected with an air inlet of the detector and an air inlet of the sensor module;

[0018] A second air passage, the second air passage is arranged in the housing of the detector, and the second air passage is connected with the air outlet of the sensor module and the air pump;

[0019] The third air channel is arranged in the housing of the detector, and the third air channel is connected with the air pump and the air outlet of the detector.

[0020] The atmospheric composition detector described in the present invention arranges an air inlet and an air outlet of the detector on the detector housing, and arranges a gas sensor module, an air pump, a first air duct, a second air duct and a third air duct in the detector housing, so that the air inlet of the detector, the first air duct, the gas sensor module, the second air duct, the air pump, the third air duct and the air outlet of the detector are connected in sequence, and then under the action of the air pump, it is ensured that air can continuously and stably enter the gas sensor module, thereby ensuring the stable state of the air pressure entering the gas sensor module. The gas sensor module has a sensor module airway, an ionization inner space, an ultraviolet light generator and a signal detection unit. The ionization inner space is used to connect the sensor module air inlet and the sensor module air outlet of the sensor module airway, so that gas molecules can flow from the air inlet end of the sensor module airway through the ionization inner space to the air outlet end of the sensor module airway. The air in the sensor module airway must pass through the ionization inner space before it can be discharged. When the ultraviolet light generator excites the detection gas molecules (pollutant gas molecules) in the air in the ionization inner space, the detection gas molecules in the ionization inner space are ionized into charged particles. , which can be detected by the signal detection unit. This method uses active air intake to allow air to directly enter the ionization space for ionization detection. More gas enters the ionization space for ionization, and the amount of ionized gas is larger. More air is involved in the ionization process, which increases the scale of charged particles and the signal amount. When the background noise remains unchanged, the signal-to-noise ratio is better, thereby providing more effective detection sensitivity, improving detection accuracy and detection timeliness, and being more in line with the external air concentration. The stable air pressure ensures that the ionization signal will not deviate from the actual pollutant concentration due to air pressure fluctuations, thereby making the detection quality higher.

[0021] Preferably, the air inlet of the detector is located at the top of the detector housing, and an air inlet dust cover, an air inlet dust net and an air inlet inner tube are provided at the air inlet of the detector. The lower end of the air inlet inner tube is connected to the air inlet end of the first air duct through the air inlet of the detector, the air inlet dust cover is sleeved on the outside of the air inlet inner tube, the air inlet dust net is arranged in contact with the inner wall of the air inlet dust cover, and a protective cover air inlet grille is provided on the side of the air inlet dust cover, and the highest opening height of the protective cover air inlet grille is lower than the air inlet point height of the air inlet inner tube.

[0022] In the prior art, the air inlet of the detector is set on the side to prevent water from entering; however, in the present application, because of the air pump, the air inlet of the detector is only set on the side, which results in poor waterproof effect. The present application sets the air inlet of the detector on the top of the detector housing, and provides an air inlet dust cover, an air inlet dust net and an air inlet inner tube at the air inlet of the detector. Air enters from the protective cover air inlet grille on the side of the air inlet dust cover, and enters the first airway from the air inlet inner tube after being filtered by the air inlet dust net. The air inlet inner tube is used to connect the air inlet end of the first airway, and the air inlet dust net is set on the inner side of the air inlet dust cover to filter foreign matter to avoid blocking the internal airway and affecting the air detection quality. Because the highest opening height of the protective cover air intake grille is lower than the air intake point height of the air inlet inner tube, under the suction of the air pump, the air can reach the air intake point height of the air inlet inner tube from the protective cover air intake grille, and then enter the air inlet inner tube; while under the action of gravity, water cannot reach the air intake point height of the air inlet inner tube under the action of the air pump, thereby ensuring the waterproof effect, which greatly ensures the stability of the operation and reduces the impact on air detection.

[0023] Preferably, a particle sensor is further provided in the detector housing, and a splash-proof grille is provided on the side of the detector housing, and the splash-proof grille is provided corresponding to the particle sensor.

[0024] Preferably, an Internet of Things communication module and a main control board of the detector are further provided in the housing of the detector, and the Internet of Things communication module is electrically connected to the main control board of the detector. A communication antenna, a satellite positioning antenna, a display screen and an operation panel are provided on the outside of the housing of the detector, and the Internet of Things communication module, the communication antenna, the satellite positioning antenna, the display screen and the operation panel are all electrically connected to the main control board of the detector.

[0025] The gas sensor module also includes a sensor module main control board, the signal detection unit is electrically connected to the detection circuit on the sensor module main control board, and the sensor module main control board is electrically connected to the detector main control board;

[0026] The sensor module main control board can obtain the detection data of the signal detection unit to form electrical signal detection data, the detector main control board can obtain the electrical signal detection data of the sensor module main control board, and the detector main control board can obtain the spatial data positioned by the satellite positioning antenna; the detector main control board can combine the electrical signal detection data and the spatial data and display them through the display screen and the operation panel; the detector main control board can combine the electrical signal detection data and the spatial data and transmit them to the cloud data platform through the Internet of Things communication module and the communication antenna.

[0027] Preferably, it also includes a memory space, and when the network condition is not good and affects the data transmission between the main control board of the detector and the cloud data platform, the memory space is used to temporarily store the data obtained by combining the electrical signal detection data and the spatial data;

[0028] The detector main control board also has an automatic data comparison module; when the automatic data comparison module detects that data is missing or lost during the communication between the detector main control board and the cloud data platform, the detector main control board will regularly report the data verification results and re-upload the missing data from the memory space to the cloud data platform.

[0029] The above method can maintain the integrity of the data transmitted to the cloud data platform.

[0030] Preferably, the memory space is an external memory card unit, and the external memory card unit can be inserted into the detector housing;

[0031] When the external memory card unit is inserted into the detector housing, the external memory card unit is electrically connected to the detector main control board;

[0032] The external memory card unit can be taken out from the detector housing.

[0033] Preferably, the cloud data platform can remotely adjust the internal parameters and settings of the detector main control board.

[0034] Preferably, the internal parameters and settings of the detector main control board include but are not limited to firmware update, status control, parameter reading and writing, data extraction and authority allocation.

[0035] Preferably, the detector housing comprises a bottom box body, a middle enclosure, and a top cover plate;

[0036] The middle enclosure is arranged above the bottom box body, an intermediate cover is arranged between the middle enclosure and the bottom box body, a first enclosed area is formed between the intermediate cover and the bottom box body, a battery pack and a battery management module are arranged in the first enclosed area, a charging socket is arranged on the bottom box body, and the charging socket, the battery pack and the battery management module are electrically connected;

[0037] The top cover plate is arranged above the middle enclosure, and a second enclosed area is formed between the middle enclosure, the intermediate cover plate and the top cover plate, and the gas sensor module, the air pump, the first airway, the second airway, the third airway, the Internet of Things communication module and the detector main control board are all arranged in the second enclosed area;

[0038] The battery pack can supply power to the Internet of Things communication module, the communication antenna of the detector main control board, the satellite positioning antenna, the display screen and the operation panel, and the gas sensor module.

[0039] It can realize automatic endurance, and isolate the battery pack from the gas sensor module, the air pump, the first airway, the second airway, the third airway, the Internet of Things communication module and the main control board of the detector, and the battery pack is arranged at the bottom to facilitate heat dissipation of the battery pack, making it safer. Moreover, this layered arrangement is more reasonable and conducive to reducing the volume; the battery pack is arranged at the bottom, which can also lower the center of gravity and is conducive to the stability of installation and carrying.

[0040] Preferably, a magnetic base is provided at the bottom of the detector housing, so as to facilitate placement on a platform or bracket such as a vehicle;

[0041] The detector housing is provided with mounting accessories, which is convenient for use with a drone or for human carrying.

[0042] Preferably, the gas sensor module further comprises a sensor module housing and a sensor module main control board;

[0043] The sensor module airway is provided inside the sensor module housing, and the sensor module housing is provided with a sensor module air inlet and a sensor module air outlet communicating with the inside and outside of the sensor module housing, the sensor module air inlet communicating with the air inlet end of the sensor module airway and the air outlet end of the first airway, and the sensor module air outlet communicating with the air outlet end of the sensor module airway and the air inlet end of the second airway;

[0044] The sensor module main control board and the ultraviolet light generator are both arranged in the sensor module housing, and a detection circuit is arranged on the sensor module main control board;

[0045] The signal detection unit includes a high potential electrode and a low potential electrode; the high potential electrode and the low potential electrode are both arranged in the sensor module housing, the high potential electrode and the low potential electrode are both electrically connected to the detection circuit, and the low potential electrode and the high potential electrode can form an electric potential field in the ionization inner space after being energized, and the electric potential field has a potential difference.

[0046] After the air enters the airway of the sensor module from the air inlet of the sensor module, it enters the ionization inner space. The ultraviolet light generator ionizes the pollutant gas molecules in the ionization inner space to generate charged ions. Under the action of the electric potential energy of the electric field formed after the high potential electrode and the low potential electrode are energized, the charged ions quickly collide with the high potential electrode and the low potential electrode, and then generate an electrical signal that is transmitted to the detection circuit on the main control board of the sensor module. The charged ions are restored to gas molecules and then discharged from the air outlet of the sensor module along with the gas.

[0047] Preferably, the gas sensor module also includes an ionization chamber, which has an ionization chamber side wall, the ionization inner space, an ionization chamber gas inlet and an ionization chamber gas outlet, the ionization inner space is located inside the ionization chamber side wall, the ionization chamber side wall is at least one of the high potential electrode and the low potential electrode, the ionization chamber body inlet connects one end of the sensor module airway close to the sensor module air inlet and the ionization inner space, and the ionization chamber gas outlet connects one end of the sensor module airway close to the sensor module air outlet and the ionization inner space.

[0048] The ionization chamber is used to facilitate the generation of an ionized inner space and to facilitate the arrangement of high potential electrodes and low potential electrodes for detecting electrical signals.

[0049] Preferably, the gas sensor module further comprises an inner needle, the inner cross-section of the ionization chamber side wall is circular, the inner needle is arranged in the radial middle of the ionization inner space, one of the inner needle and the ionization chamber side wall is a high potential electrode and the other is a low potential electrode, and the inner needle and the ionization chamber side wall can be energized to form the electric potential field;

[0050] The gas inlet of the ionization chamber is a first hole, and the gas outlet of the ionization chamber is a second hole. The first hole and the second hole are arranged on the side wall of the ionization chamber. The first hole is used to connect the sensor module airway and the ionization inner space, and the second hole is used to connect the sensor module airway and the ionization inner space.

[0051] The side wall of the ionization chamber can adopt two sheet structures, the space between the two sheet structures is the ionization inner space, and the two sheet structures have high and low potentials respectively to form a potential difference. Compared with the structure in which the side wall of the ionization chamber adopts two sheet structures to form a potential difference, this scheme adopts the side wall of the ionization chamber with a circular inner cross-section, and the inner needle is arranged in the radial middle part of the ionization inner space. The inner needle and the side wall of the ionization chamber form a potential field with a potential difference, which can detect ions in a circular direction, so that the effect of detecting ions after ionization is better, and the detection accuracy can be improved.

[0052] Preferably, the ultraviolet light generator is arranged on one axial side of the ionization chamber side wall, and one end of the ionization chamber side wall provided with the ultraviolet light generator has a third hole, and the ultraviolet light generating interface of the ultraviolet light generator faces the ionization inner space through the third hole.

[0053] The ultraviolet light of the ultraviolet light generator is emitted through the ultraviolet light generating interface, enters the ionization inner space through the third hole, and then ionizes the pollutant gas molecules entering the ionization inner space, which facilitates the setting of the ultraviolet light generator and reduces the influence of the ultraviolet light generator setting on the ionization in the ionization chamber.

[0054] Preferably, the gas sensor module further comprises a cleaning mechanism, the cleaning mechanism comprising a first motion mechanism, a second motion mechanism and a wiping member, the first motion mechanism can drive the ultraviolet light generator to approach or move away from the side wall of the ionization chamber, and the second motion mechanism can control the wiping member to swing;

[0055] After the first motion mechanism controls the ultraviolet light generator to move away from the side wall of the ionization chamber, the second motion mechanism can control the wiping member to swing and wipe the ultraviolet light generating interface of the ultraviolet light generator.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] The present invention provides an atmospheric composition detector. When an ultraviolet light generator in a gas sensor module excites detection gas molecules in an ionization inner space, the detection gas molecules in the ionization inner space are ionized into charged particles, which can be detected by a signal detection unit. Under the action of an air pump, air can continuously and stably enter the gas sensor module for detection, thereby ensuring a stable state of the air pressure of the air entering the gas sensor module. The air entering the airway of the sensor module must pass through the ionization inner space before being discharged. More air participates in the ionization process, increasing the scale of charged particles, resulting in a larger signal amount. Under the condition that the background noise remains unchanged, the signal-to-noise ratio is better, thereby providing more effective detection sensitivity, improving detection accuracy and detection timeliness, and being more in line with the external air concentration. The stable air pressure ensures that the ionization signal will not deviate from the actual pollutant concentration due to air pressure fluctuations, thereby making the detection quality higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is a schematic diagram of the structure of the atmospheric composition detector;

[0059] Figure 2 This is an exploded schematic diagram of the structure of the atmospheric composition detector from the first perspective;

[0060] Figure 3 This is an exploded schematic diagram of the structure of the atmosphere composition detector from the second perspective;

[0061] Figure 4 Schematic diagram of air flow in the atmospheric composition detector Figure 1 ;

[0062] Figure 5 Schematic diagram of air flow in the atmospheric composition detector Figure 2 ;

[0063] Figure 6 Schematic diagram of air flow in the atmospheric composition detector Figure 3 ;

[0064] Figure 7 Schematic diagram of the explosion of the gas sensor module of the present invention Figure 1 ;

[0065] Figure 8 Schematic diagram of the explosion of the gas sensor module of the present invention Figure 2 ;

[0066] Fig. 9 A schematic diagram of an air passage being arranged on the inner side of a shell;

[0067] Fig.10 Schematic diagram of the positions of the air inlet and the air outlet;

[0068] Fig.11 This is a schematic diagram of the location of the ionization chamber in the airway;

[0069] Fig.12 The figure is a side view of the setting position of the ionization chamber in the airway;

[0070] Fig.13 This is a schematic diagram of the positions of the UV lamp and the ionization chamber;

[0071] Fig.14 It is a schematic diagram of the position of the inner needle and the ionization chamber;

[0072] Fig.15 It is a front view schematic diagram of the side wall of the ionization chamber;

[0073] Fig.16 It is a side schematic diagram of the side wall of the ionization chamber;

[0074] Fig.17 It is a plan view of the ionization chamber (looking up and looking down);

[0075] Fig.18 This is a three-dimensional schematic diagram of the installation of the ionization chamber;

[0076] Fig.19 This is a schematic diagram of the installation side of the ionization chamber;

[0077] Fig. 20 This is a front view of the installation of the ionization chamber;

[0078] Fig.21 for Fig. 20 Sectional view at AA in the middle;

[0079] Fig. 22 Illustration of the work of the cleaning agency Figure 1 ;

[0080] Fig.23 Illustration of the work of the cleaning agency Figure 2 ;

[0081] Fig.24 Illustration of the work of the cleaning agency Figure 3 ;

[0082] Fig.25 This is the working principle of the cleaning organization Figure 4 .

[0083] Markings in the figure: 1. Ionization chamber; 11. Ionization chamber side wall; 12. Ionization inner space; 13. Inner needle; 111. First hole; 112. Second hole; 2. Sensor module airway; 21. Inlet airway; 22. Detection airway; 23. Exhaust airway; 24. Arc-shaped channel; 25. Guide fins; 3. Ultraviolet light generator; 31. Ultraviolet lamp; 311. Ultraviolet light generating interface; 32. Ultraviolet mounting cover; 33. Ultraviolet safety Hinge shaft; 4. Sensor module main body shell; 41. Sensor module main body inner wall; 42. Sensor module bottom cover; 421. Sensor module main control board; 422. First PCB board; 423. Second PCB board; 424. First electrical connection column; 425. Second electrical connection column; 426. Sealing structure; 51. First motor; 52. Second motor; 53. Link mechanism; 54. Swing rod; 55. Wiping member; 6. Sensor Module custom adapter plate; 71, sensor module air inlet; 72, sensor module air outlet; 8, sensor module external interface; 91, detector housing; 911, bottom box; 912, middle cover; 913, middle enclosure; 914, top cover; 915, magnetic base; 921, air inlet dust cover; 922, air inlet dust net; 923, air inlet inner tube; 93, particle sensor; 931, splashproof barrier Grid; 94, air pump; 95, Internet of Things communication module; 951, communication antenna; 952, satellite positioning antenna; 96, detector main control board; 97, display screen and operation panel; 98, battery pack; 981, battery management module; 982, charging socket; 99, gas sensor module; 991, first air duct; 992, second air duct; 993, third air duct; 994, detector air outlet; 910, external storage card unit. DETAILED DESCRIPTION

[0084] The present invention is further described in detail below in conjunction with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0085] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0086] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0087] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0088] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0089] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0090] Example

[0091] An atmospheric composition detector, such as Figure 1-Figure 3 As shown, it includes a detector housing 91, a gas sensor module 99, an air pump 94, a first air channel 991, a second air channel 992 and a third air channel 993, and the gas sensor module 99, the air pump 94, the first air channel 991, the second air channel 992 and the third air channel 993 are all arranged in the detector housing 91.

[0092] like Figure 7-Figure 8 As shown, the gas sensor module 99 has a sensor module airway 2, an ionization inner space 12, an ultraviolet light generator 3 and a signal detection unit inside; the ionization inner space 12 is used to connect the sensor module air inlet 71 and the sensor module air outlet 72 of the sensor module airway 2, so that the gas molecules can flow from the air inlet end of the sensor module airway 2 through the ionization inner space 12 to the air outlet end of the sensor module airway 2; the ultraviolet light generator 3 can provide energy for the gas molecules in the ionization inner space 12, so that the gas molecules in the ionization inner space 12 can be ionized, and the signal detection unit is used to detect the ionization signal of the gas molecules in the ionization inner space 12;

[0093] like Figure 4-Figure 6 As shown, the first air passage 991 is disposed in the detector housing 91, and the first air passage 991 communicates with the detector air inlet and the sensor module air inlet 71;

[0094] like Figure 4-Figure 6 As shown, the second air passage 992 is disposed in the detector housing 91 , and the second air passage 992 communicates with the sensor module air outlet 72 and the air pump 94 ;

[0095] like Figure 4-Figure 6 As shown, the third air channel 993 is arranged in the detector housing 91, and the third air channel 993 connects the air pump 94 and the detector outlet.

[0096] In the above structure, the air inlet of the detector, the first air channel 991, the gas sensor module 99, the second air channel 992, the air pump 94, the third air channel 993 and the air outlet of the detector are connected in sequence, and under the action of the air pump 94, air can be continuously and stably entered into the gas sensor module, thereby ensuring the stable state of the air pressure entering the gas sensor module. The gas sensor module 99 has a sensor module airway 2, an ionization inner space 12, an ultraviolet light generator 3 and a signal detection unit. The ionization inner space 12 is used to connect the sensor module air inlet 71 and the sensor module air outlet 72 of the sensor module airway 2, so that gas molecules can flow from the air inlet end of the sensor module airway 2 through the ionization inner space 12 to the air outlet end of the sensor module airway 2, and the air in the sensor module airway 2 must pass through the ionization inner space 12 before it can be discharged. When the ultraviolet light generator 3 excites the detection gas molecules in the ionization inner space 12, the detection gas molecules (pollutant gas molecules, pollutant gas molecules refer to VOC ( Volatile organic matter (VOC) type pollutants) ionize charged particles, which can be detected by the signal detection unit. This method uses active air intake to allow air to directly enter the ionization inner space 12 for ionization detection. More gas enters the ionization inner space 12 for ionization, and the amount of ionized gas is larger. More sampled air participates in the ionization process, increasing the scale of charged particles, and the signal amount is larger. Under the condition that the background noise remains unchanged, the signal-to-noise ratio is better, thereby providing more effective detection sensitivity, improving detection accuracy and detection timeliness, and more in line with the external air concentration. The stable air pressure ensures that the ionization signal will not deviate from the actual pollutant concentration due to air pressure fluctuations, so that the detection quality is higher. That is, a negative pressure is formed at the air outlet 72 of the sensor module through the air pump, so that the air in the airway 2 of the sensor module is continuously and stably updated, and the air inside the airway 2 of the sensor module and the external environment air can be synchronized in real time. And it can make the gas enter the ionization inner space 12 faster, can improve the response speed, and make the detection efficiency higher; and the gas update cycle entering the ionization inner space 12 is short, which is conducive to real-time acquisition of more accurate detection results.

[0097] like Figure 7-Figure 8 As shown, the gas sensor module 99 includes a sensor module housing, a sensor module main control board 421, an ionization inner space 12, a high potential electrode, a low potential electrode and an ultraviolet light generator 3. The sensor module main control board 421, the ionization inner space 12, the high potential electrode, the low potential electrode and the ultraviolet light generator 3 are all arranged in the sensor module housing to form protection.

[0098] like Figure 7 and Figure 8As shown, the sensor module housing includes a sensor module main body housing 4 and a sensor module bottom cover 42. The sensor module main body housing 4 is a rectangular box structure. The sensor module main body housing 4 and the sensor module bottom cover 42 are connected by a detachable connection method such as screws, which is convenient for installing the sensor module main control board 421, the ionization inner space 12, the high potential electrode, the low potential electrode and the ultraviolet light generator in the sensor module housing, and is convenient for maintenance and replacement. A sensor module external interface 8 and a sensor module custom adapter board 6 are also provided on the outside of the sensor module housing. The sensor module external interface 8 serves as a data interface and is electrically connected to the sensor module main control board 421; the sensor module custom adapter board 6 can be used for conversion connection to form a docking with various circuit interfaces outside the sensor.

[0099] like Fig. 9 and Fig.10 As shown, a sensor module airway 2 is provided inside the sensor module housing, and the sensor module housing is provided with a sensor module air inlet 71 and a sensor module air outlet 72 communicating with the inside and outside of the sensor module housing, the sensor module air inlet 71 is communicated with one end of the sensor module airway 2, and the sensor module air outlet 72 is communicated with the other end of the sensor module airway 2;

[0100] The sensor module main control board 421 is provided with a detection circuit, and the detection circuit can adopt a conventional circuit structure for detecting electrical signals; for example, the detection circuit includes a pre-amplifier, a main amplifier, a filter, an analog-to-digital converter ADC, and a microcontroller. The pre-amplifier is used to amplify the weak signal generated by the ionization chamber. The pre-amplifier usually has high input impedance and low noise characteristics to ensure the integrity of the signal. The transimpedance amplifier is the most commonly used type of pre-amplifier, which converts the current signal into a voltage signal and performs preliminary amplification. The main amplifier is used to further amplify the signal output by the pre-amplifier to a level that can be processed by subsequent circuits. The operational amplifier is often used as the main amplifier to provide high gain to ensure sufficient amplification of the signal. The filter is used to remove noise from the signal and improve the signal-to-noise ratio. The low-pass filter and the band-pass filter are the most commonly used filter types. The low-pass filter removes high-frequency noise, and the band-pass filter only allows signals within a specific frequency range to pass. The analog-to-digital converter ADC converts the analog signal into a digital signal, which is convenient for subsequent digital processing and analysis, and converts the amplified analog signal into a digital signal for processing by a microcontroller or computer. The microcontroller or computer is used to process and analyze the digital signal output by the ADC, record and display the data, and can communicate with the ADC through the SPI, I2C or UART interface.

[0101] The ionization inner space 12 is disposed in the sensor module airway 2, and the sensor module airway 2 is connected to both ends of the sensor module airway 2 through the ionization inner space 12; so that air enters the sensor module airway 2 through the sensor module air inlet 71, and must pass through the ionization inner space 12 before being discharged from the sensor module air outlet 72;

[0102] The signal detection unit includes a high potential electrode and a low potential electrode, wherein the high potential electrode is electrically connected to the detection circuit and can transmit an electrical signal to the detection circuit; the low potential electrode is electrically connected to the detection circuit and can transmit an electrical signal to the detection circuit; when both the low potential electrode and the high potential electrode are energized, an electric potential field can be formed in the ionization inner space 12, and the electric potential field has a potential difference, thereby being able to separate the ionized positive ions and negatively charged electrons;

[0103] The ultraviolet light generator is disposed in the sensor module housing, and can provide ionization energy for the gas entering the ionization inner space 12, so that the gas molecules can be ionized in the ionization inner space 12. The ultraviolet light generator can adopt a structure such as an ultraviolet lamp 31, which can provide high energy for exciting the ionization of air molecules.

[0104] When using the gas sensor module, after air enters the sensor module airway 2 from the sensor module air inlet 71, it passes through the ionization inner space 12. Under the excitation of the ultraviolet light generator, the pollutant gas molecules are ionized to form charged particles. Driven by the electric potential energy of the electric field, the charged particles quickly collide with the high potential electrode and the low potential electrode under the action of the electric potential energy, generating a current signal, which is transmitted to the detection circuit on the sensor module main control board 421. Since the ionization inner space 12 is set on the path that the detection gas must pass through and will not affect the entry and discharge of the detection gas, the ozone ions in the ionization inner space 12 are discharged along with the detection gas, reducing the interference of ozone on the ionization process, thereby improving the ionization effect; and the detection gas introduced into the sensor module airway 2 can be basically ionized, so that the amount of ionized gas in the same time is larger, more air is involved in the ionization process, the scale of charged particles is increased, the signal amount is larger, and the signal-to-noise ratio is better when the background noise remains unchanged, thereby providing more effective detection sensitivity, improving detection accuracy and detection timeliness, and being more in line with the external air concentration. The stable air pressure ensures that the ionization signal will not deviate from the actual pollutant concentration due to air pressure fluctuations, so that the detection quality is higher.

[0105] For the above-mentioned gas sensor module, the ionization effect, installation convenience and sensor size are optimized as follows.

[0106] In some embodiments, the ionization inner space 12 is located in the ionization chamber 1, and the ionization chamber 1 has an ionization chamber side wall 11, the ionization inner space 12, the ionization chamber 1 gas inlet and the ionization chamber 1 gas outlet, the ionization inner space 12 is located in the ionization chamber side wall 11, and the ionization chamber side wall 11 is at least one of the high potential electrode and the low potential electrode, the ionization chamber 1 gas inlet connects one end of the sensor module airway 2 close to the sensor module air inlet 71 and the ionization inner space 12, and the ionization chamber 1 gas outlet connects one end of the sensor module airway 2 close to the sensor module air outlet 72 and the ionization inner space 12.

[0107] The ionization chamber 1 structure is used to form the ionization inner space 12 and the electric potential field, so that ionization and the capture of electrical signals are more convenient.

[0108] When the ionization chamber side wall 11 is composed of two opposite pieces, the space between the two pieces serves as an ionization inner space 12, through which gas can pass, so that the gas flows from one end of the sensor module airway 2 to the other end of the sensor module airway 2. The two pieces can serve as high potential electrodes and low potential electrodes respectively, forming an electric potential field between the two pieces.

[0109] When the ion chamber side wall 11 is an integral structure, it can only serve as one of the high potential electrode and the low potential electrode. Figure 13-Figure 17 As shown, the gas sensor module further includes an inner needle 13, the inner cross-section of the ionization chamber side wall 11 is circular, the inner needle 13 is arranged in the radial middle of the ionization inner space 12, one of the inner needle 13 and the ionization chamber side wall 11 is a high potential electrode, and the other is a low potential electrode, and the inner needle 13 and the ionization chamber side wall 11 can be energized to form the electric potential field;

[0110] The gas inlet of the ionization chamber 1 is a first hole 111, and the gas outlet of the ionization chamber 1 is a second hole 112. The first hole 111 and the second hole 112 are arranged on the side wall 11 of the ionization chamber. The first hole 111 is used to connect the sensor module airway 2 and the ionization inner space 12, and the second hole 112 is used to connect the sensor module airway 2 and the ionization inner space 12.

[0111] Compared with the structure in which the ionization chamber side wall 11 uses two sheet structures to form a potential difference, this solution uses the ionization chamber side wall 11 with a circular inner cross-section, and sets the inner needle 13 in the radial middle of the ionization inner space 12, such as Fig.17 As shown, the inner needle 13 and the ionization chamber side wall 11 form an electric potential field with a potential difference, which can detect ions in a circular direction, so that the effect of detecting ions after ionization is better and the detection accuracy can be improved.

[0112] As a preferred embodiment, the side wall 11 of the ionization chamber is a high potential electrode, and the inner needle 13 is a low potential electrode. That is, when the power is turned on, the potential of the side wall 11 of the ionization chamber is higher than the potential of the inner needle 13, so that the positively charged ions after ionization can flow to the inner needle 13, and are captured by the inner needle 13 to form an electrical signal. Compared with making the potential of the side wall 11 of the ionization chamber lower than the potential of the inner needle 13, that is, allowing the positively charged ions after ionization to flow to the side wall 11 of the ionization chamber, this solution allows the positively charged ions after ionization to flow to the inner needle 13, and the area of ​​the inner needle 13 is smaller than the area of ​​the side wall 11 of the ionization chamber, thereby making the interference of the captured positively charged ions after ionization smaller, which is more conducive to ensuring the detection results.

[0113] Furthermore, the inner needle 13 is arranged in the middle of the ionization inner space 12, so that the distance between the inner needle 13 and the ionization chamber side wall 11 is balanced, thereby enabling more positively charged ions to be captured after the gas is ionized, which is beneficial to improving the reaction sensitivity and accuracy.

[0114] In order to improve the gas utilization rate of the ionization inner space 12 and facilitate the installation of the ionization chamber 1, the present application also optimizes the structure of the sensor module airway 2, such as Fig.13 and Fig.14 As shown, the sensor module airway 2 is a groove-shaped structure opened on the inner surface of the sensor module housing. Specifically, it is arranged on the inner wall 41 of the sensor module body inside the sensor module main housing 4. The notch of the groove-shaped structure faces the inside of the sensor module housing. The sensor module main control board 421 covers the notch of the sensor module airway 2. Figure 8 and Fig.12 , the ionization chamber 1 is inserted downward into the groove-shaped structure, and the sensor module main control board 421 seals the groove to form a closed sensor module airway 2, preventing gas from overflowing the sensor module airway 2 and entering the sensor. This arrangement is convenient for opening the sensor module airway 2 and installing the ionization chamber 1 in the sensor module airway 2. The sensor module main control board 421 seals the groove to ensure the airtightness, thereby allowing the gas in the sensor module airway 2 to enter the ionization inner space 12 for ionization.

[0115] In order to improve the gas renewal efficiency in the sensor module airway 2, the sensor module airway 2 is further optimized, and the difference in cross-sectional area at different longitudinal positions of the sensor module airway 2 does not exceed ±10%. Fig.11 As shown, it can ensure that the velocity variation of the gas flowing in the airway 2 of the sensor module is small, thereby improving the renewal efficiency of the gas in the airway 2 of the sensor module, so that the performance of the same sensor product on different instruments is more consistent.

[0116] In order to reduce the volume of the sensor, the sensor module airway 2 is further optimized. The outer contours of the cross section and the longitudinal section of the sensor module housing are both rectangular. The sensor module airway 2 includes an inlet airway 21, an outlet airway 23 and a detection airway 22. The detection airway 22 is arranged along the width direction of the sensor module housing. Fig.11 As shown, the air inlet duct 21 and the air outlet duct 23 are both arranged along the length direction of the sensor module housing, the air inlet duct 21 and the air outlet duct 23 are located on the same side of the detection air duct 22, the air inlet duct 21 and the air outlet duct 23 are connected to both ends of the detection air duct 22, the air inlet duct 21 is connected to the sensor module air inlet 71, the air outlet duct 23 is connected to the sensor module air outlet 72, and the ionization chamber 1 is arranged in the detection air duct 22. This arrangement can reduce the influence of the sensor module air duct 2 arrangement on the sensor volume and reduce the volume of the sensor.

[0117] In order to improve the gas renewal efficiency in the airway 2 of the sensor module, the airway 2 of the sensor module is further optimized, and the portion where the air inlet duct 21 and the detection airway 22 are connected adopts an arc-shaped channel 24, and the portion where the air outlet duct 23 and the detection airway 22 are connected adopts an arc-shaped channel 24. This allows the portion where the air inlet duct 21 and the detection airway 22 are connected and the portion where the air outlet duct 23 and the detection airway 22 are connected to be able to transition smoothly, thereby reducing the possibility of gas vortexes at the angle, making the speed of the gas flowing in the airway 2 of the sensor module change less, thereby improving the gas renewal efficiency in the airway 2 of the sensor module, and making the same sensor product have higher performance consistency on different instruments.

[0118] In order to improve the gas renewal efficiency in the sensor module airway 2, the sensor module airway 2 is further optimized, such as Fig.11 As shown, the inner wall of the arc-shaped channel 24 is provided with a guide fin 25, and the direction of the guide fin 25 is adapted to the central axis of the arc-shaped channel 24. This makes the gas smoother when making a large turn, and improves the gas renewal efficiency.

[0119] In order to improve the gas utilization rate and renewal rate of the ionization inner space 12 and facilitate the installation of the ionization chamber 1, the sensor module airway 2 is further optimized, and the interior of the detection airway 22 is a rectangular cross-section with an arc chamfer. The cross-section of the detection airway 22 used to set the ionization chamber 1 is a rectangular cross-section, which can better set the ionization chamber 1 and ensure the sealing performance to avoid leakage at the location where the ionization chamber 1 is set; the four corners of the rectangular cross-section have arc chamfers to reduce the generation of eddy currents, retention, contaminant retention or dead corners, etc., which can improve the smoothness of gas flow and improve the gas renewal efficiency.

[0120] In some embodiments, Fig.14As shown, the ultraviolet light generator 3 is arranged on one axial side of the ionization chamber side wall 11, and the end of the ultraviolet light generator 3 provided on the ionization chamber side wall 11 has a third hole, and the ultraviolet light generating interface 311 of the ultraviolet light generator 3 passes through the third hole toward the ionization inner space 12. The ultraviolet light of the ultraviolet light generator 3 is emitted through the ultraviolet light generating interface 311, enters the ionization inner space 12 through the third hole, and then ionizes the pollutant gas molecules entering the ionization inner space 12.

[0121] In some embodiments, Fig.18 As shown, a sealing structure 426 is provided between the ultraviolet light generator 3 and the side wall 11 of the ionization chamber. The sealing structure 426 is used to seal the contact position between the ultraviolet light generating interface 311 of the ultraviolet light generator 3 and the side wall 11 of the ionization chamber to prevent the detection gas from overflowing from the ionization inner space 12. The sealing structure 426 seals the contact position between the ultraviolet light generating interface 311 of the ultraviolet light generator 3 and the side wall 11 of the ionization chamber, and can adopt direct sealing or indirect sealing, such as adopting a sealing ring. On the premise of ensuring that the ultraviolet light of the ultraviolet light generator 3 can enter the ionization inner space 12 to excite the pollutant gas molecules, the detection gas can be prevented from overflowing from the ionization inner space 12 into the ionization inner space 12, and the pollutant gas molecules entering the sensor module airway 2 can be ionized in the ionization inner space 12 as much as possible, while preventing the gas molecules from overflowing the sensor module airway 2 into the sensor, and preventing the gas molecules from affecting other components in the sensor.

[0122] like Figure 19-21As shown, the upper end of the ionization chamber side wall 11 is embedded in the mounting hole of the first PCB board 422, and the ionization chamber side wall 11 is electrically connected to the first PCB board 422, and the lower end of the ionization chamber side wall 11 is embedded in the mounting groove of the second PCB board 423, and the ionization chamber side wall 11 and the second PCB board 423 are insulated; the inner needle 13 is located at the axis of the ionization inner space 12 in the ionization chamber side wall 11, and the lower end passes through the fourth hole of the ionization chamber side wall 11 and is fixed on the second PCB board 423, and is electrically connected to the second PCB board 423, and the second PCB board 423 blocks the fourth hole, and the sensor module main control Board 421 is located above the first PCB board 422, and the first PCB board 422 and the second PCB board 423 are connected to form a whole through the first electrical connection column 424 and the second electrical connection column 425 on both sides, and the first electrical connection column 424 and the second electrical connection column 425 extend to the sensor module main control board 421, the first electrical connection column 424 electrically connects the first PCB board 422 and the sensor module main control board 421, and the second electrical connection column 425 electrically connects the second PCB board 423 and the sensor module main control board 421, so that an electric potential difference is formed between the side wall 11 of the ionization chamber and the inner needle 13 on the inside. The sensor module main control board 421 is provided with a mounting hole, through which the ultraviolet lamp 31 of the ultraviolet light generator 3 can pass, so that the ultraviolet light generating interface 311 of the ultraviolet lamp 31 can be aligned with the third hole at the upper end of the ionization chamber side wall 11, and a sealing structure 426 is provided on the outside of the connection between the ultraviolet lamp 31 and the first PCB board 422 on the side facing the sensor module main control board 421. The sealing structure 426 is used to seal the contact position between the ultraviolet light generating interface 311 of the ultraviolet light generator 3 and the ionization chamber side wall 11 to prevent the detection gas from overflowing from the ionization inner space 12. The sealing structure 426 can be a sealing ring or a sealing ring, etc.

[0123] After research, it is found that ozone ions have the effect of cleaning organic pollutants accumulated in the ionization chamber 1 and on the interface of the ultraviolet lamp 31. Because the ionization chamber 1 is set on the necessary path of the sensor module airway 2, the ozone ions generated by the ultraviolet light in the ionization inner space 12 are basically taken out by the detection gas, and the cleaning ability is basically eliminated, which makes it impossible to remove the organic pollutants on the interface of the ultraviolet lamp 31, thereby shortening the service life. In this application, the ionization structure is also provided with a cleaning mechanism, which includes a first motion mechanism, a second motion mechanism and a wiping member 55. The first motion mechanism can drive the ultraviolet light generator 3 to approach or move away from the ionization chamber side wall 11, and the second motion mechanism can control the wiping member 55 to swing; so that after the first motion mechanism controls the ultraviolet light generator 3 to move away from the ionization chamber side wall 11, the second motion mechanism can control the wiping member 55 to swing and wipe the ultraviolet light generating interface 311 of the ultraviolet light generator 3. By wiping the ultraviolet light generating interface 311 of the ultraviolet light generator 3, the ultraviolet light generating interface 311 can be kept clean for a long time, and the performance degradation phenomenon caused by the accumulation of pollutants can be reduced as much as possible or even eliminated.

[0124] like Figure 22-Figure 25 As shown, the first motion mechanism includes a first motor 51 and a connecting rod mechanism 53. The first motor 51 is arranged on the sensor module main control board 421. The connecting rod mechanism 53 connects the ultraviolet light generator 3 and the rotating shaft of the first motor 51. The rotation of the first motor 51 drives the connecting rod mechanism 53 to rotate, thereby driving the ultraviolet light generator 3 to move, and controlling the ultraviolet light generator 3 to move away from or close to the side wall 11 of the ionization chamber. Optionally, the ultraviolet light generator 3 is moved away from or close to the side wall 11 of the ionization chamber by rotation. The ultraviolet light generator 3 includes an ultraviolet lamp 31 and an ultraviolet mounting cover 32. The ultraviolet lamp 31 is embedded in the ultraviolet mounting cover 32. One side of the ultraviolet mounting cover 32 is hinged to the sensor module main control board 421 through an ultraviolet mounting hinge shaft 33. The first motor 51 rotates to drive the connecting rod mechanism 53 to rotate, thereby driving the ultraviolet light generator 3 to rotate along the ultraviolet mounting hinge shaft 33, so that the ultraviolet light generator 3 is moved away from or close to the side wall 11 of the ionization chamber. This control method can ensure the consistency of the movement of the ultraviolet light generator 3 away from or close to the side wall 11 of the ionization chamber, thereby ensuring that the ultraviolet light generating interface 311 of the ultraviolet light generator 3 can be installed in place after cleaning and aligned with the third hole.

[0125] The second motion mechanism includes a second motor 52, a swing rod 54 and a wiping component 55. The second motor 52 is arranged on the sensor module main control board 421. The swing rod 54 connects the second motor 52 shaft and the wiping component 55. After the first motion mechanism controls the ultraviolet light generator 3 to move away from the ionization chamber side wall 11, the second motor 52 controls the swing rod 54 and the wiping component 55 to swing back and forth to wipe the ultraviolet light generating interface 311 of the ultraviolet light generator 3, wherein the wiping component 55 wipes one side of the ultraviolet light generating interface 311 to adapt to the shape of the ultraviolet light generating interface 311 after rotation, thereby ensuring the cleanliness and safety of wiping and avoiding damage to the ultraviolet light generating interface 311.

[0126] On the premise that the ionization chamber 11 is set in the necessary path of the sensor module airway 2, a cleaning mechanism is set to achieve the two goals of not attenuating the cleaning performance of the components in the ionization chamber 1 and ensuring that the ionization chamber 1 has sufficient air intake and high sensitivity and accuracy.

[0127] In the gas sensor module of this embodiment, the side wall 11 of the ionization chamber is designed to be barrel-shaped. The structure of the ionization chamber 1 consists of two components, an outer barrel and an inner needle 13. When working, the two components have a large potential difference, so that a high-voltage electric field is formed in the barrel-shaped ionization chamber 1. One end of the barrel-shaped ionization chamber 1 is an ultraviolet light source UV. When the gas to be measured enters the ionization chamber 1, it is immediately irradiated by ultraviolet light. When the gas absorbs high-energy ultraviolet light, the pollutant gas molecules are excited by the ultraviolet light and temporarily lose electrons to become positively charged ions. Driven by the high and low potential energy environment in the ionization chamber 1, the charged particles quickly flow to the outer barrel or the inner needle 13, forming a current signal in the detection circuit connected to the ionization chamber 1.

[0128] In order to meet the requirements of response speed and accuracy, the present embodiment sets a sensor module airway 2 in the sensor, places the barrel-shaped ionization chamber side wall 11 in the only gas flow channel, and sets a first vent hole 111 and a second vent hole 112 on the ionization chamber side wall 11, so that the gas to be measured can actively and smoothly flow through the ionization inner space 12, and the gas involved in ionization is more saturated and updated quickly, so that the detection response is faster, the signal is larger, the gas update cycle is short, and the signal is more real-time and sensitive, so that the sensor response sensitivity is high and the result data is consistent with the actual concentration of the gas to be measured. The gas in the sensor module airway 2 is driven by the air pump at the rear end of the air path, and the gas maintains a continuous and stable flow, which makes it difficult for ozone ions to gather and stay in the ionization chamber 1, thereby further eliminating the problem of reduced ionization efficiency caused by ozone, and at the same time providing a guarantee for the update efficiency of the sensor module airway 2. The structure of the sensor module airway 2 is designed to improve the gas renewal efficiency in the ionization inner space 12, thereby improving the ionization effect, reducing the residence of gas or pollutants in the sensor module airway 2, making the gas renewal in the gas channel more thorough, making the sensor response more accurate and fast, and reducing the impact on data timeliness. In order to achieve long-term stability in ionization performance and reduce data drift caused by attenuation, this embodiment can also adopt a self-developed cleaning mechanism, which is installed inside the sensor and directly acts on the related components of the ionization chamber 1, so that the related components of the ionization chamber 1 can be kept clean for a long time, eliminating the performance attenuation phenomenon caused by the accumulation of pollutants. This embodiment also optimizes the installation of structures such as the ionization chamber 1, the sensor module airway 2, the sensor module main control board 421, and the cleaning mechanism, so that the installation is convenient, and a better environment is provided as much as possible for the ionization effect and the accuracy of the detection results, and the volume of the sensor can be controlled as much as possible.

[0129] In the prior art, the air inlet of the detector is set on the side to prevent water from entering. In this embodiment, because the air pump 94 is set, the waterproof effect is not good by simply setting the air inlet of the detector on the side. This embodiment can adopt a better implementation method, such as Figure 1-Figure 6As shown, the air inlet of the detector is located at the top of the detector housing 91, and an air inlet dust cover 921, an air inlet dust net 922 and an air inlet inner tube 923 are provided at the air inlet of the detector. The lower end of the air inlet inner tube 923 is connected to the air inlet end of the first air duct 991 through the air inlet of the detector, the air inlet dust cover 921 is sleeved on the outer side of the air inlet inner tube 923, and the air inlet dust net 922 fits the inner wall of the air inlet dust cover 921 The side of the air inlet dust cover 921 is provided with a protective cover air inlet grille. Air enters from the protective cover air inlet grille on the side of the air inlet dust cover 921, and enters the first air passage 991 from the air inlet inner tube 923 after being filtered by the air inlet dust net 922. The air inlet inner tube 923 is used to connect the air inlet end of the first air passage 991. The air inlet dust net 922 is arranged on the inner side of the air inlet dust cover 921 to filter foreign matter, avoid blocking the internal air passage and affecting the quality of air detection. Because the highest opening height of the protective cover air inlet grille is lower than the air inlet point height of the air inlet inner tube 923, under the suction of the air pump, the air can reach the air inlet point height of the air inlet inner tube 923 from the protective cover air inlet grille, and then enter the air inlet inner tube 923; and water cannot reach the air inlet point height of the air inlet inner tube 923 under the action of gravity, thereby ensuring the waterproof effect, which greatly ensures the stability of the operation and reduces the impact on air detection.

[0130] In this embodiment, in addition to using the gas sensor module to respond to volatile organic compounds in the air, that is, to sense and detect the specified pollutants at the molecular level in the air, a particle sensor 93 can also be set to detect PM10 and PM2.5, which belongs to the detection of physical particles. Figure 2 As shown, a particle sensor 93 is also provided in the detector housing 91, and a splash-proof grille 931 is provided on the side of the detector housing 91. The splash-proof grille 931 is arranged corresponding to the particle sensor 93. The splash-proof grille 931 serves as an inlet of escaped air detected by the particle sensor 93 and can also achieve waterproofing.

[0131] In this embodiment, an Internet of Things communication module 95 and a detector main control board 96 are further provided in the detector housing 91, and the Internet of Things communication module 95 is electrically connected to the detector main control board 96. A communication antenna 951, a satellite positioning antenna 952, a display screen and an operation panel 97 are provided on the outside of the detector housing 91, and the Internet of Things communication module 95, the communication antenna 951, the satellite positioning antenna 952, the display screen and the operation panel 97 are all electrically connected to the detector main control board 96; the signal detection unit is electrically connected to the detection circuit on the sensor module main control board 421 of the gas sensor module 99, and the sensor module main control board 421 is electrically connected to the detector main control board 96;

[0132] The sensor module main control board 421 can obtain the detection data of the signal detection unit to form electrical signal detection data, the detector main control board 96 can obtain the electrical signal detection data of the sensor module main control board 421, and the detector main control board 96 can obtain the spatial data located by the satellite positioning antenna 952; the detector main control board 96 can combine the electrical signal detection data with the spatial data and display them through the display screen and the operation panel 97; the detector main control board 96 can combine the electrical signal detection data with the spatial data and transmit them to the cloud data platform through the Internet of Things communication module 95 and the communication antenna 951. The electrical signal detection data detected by the gas sensor module 99 is combined with the spatial data located by the satellite positioning antenna 952, so as to obtain the air detection data of any spatial position, and the data can be displayed through the display screen and the operation panel 97, or can be wirelessly transmitted to the cloud data platform, so that the relevant air quality data can be viewed remotely.

[0133] In some embodiments, Figure 3 As shown, the detector also includes a memory space. When the network condition is not good and affects the data transmission between the detector main control board 96 and the cloud data platform, the memory space is used to temporarily store the data obtained by combining the electrical signal detection data and the spatial data; the detector main control board 96 also has an automatic data comparison module; when the automatic data comparison module detects that data is missing or lost during the communication between the detector main control board 96 and the cloud data platform, the detector main control board 96 will regularly report the data verification results and re-transmit the missing data from the memory space to the cloud data platform, thereby maintaining the integrity of the data transmitted to the cloud data platform.

[0134] Further, such as Figure 3 As shown, the memory space is an external memory card unit 910, and the external memory card unit 910 can be inserted into the detector housing 91; when the external memory card unit 910 is inserted into the detector housing 91, the external memory card unit 910 is electrically connected to the detector main control board 96; the external memory card unit 910 can be taken out from the detector housing 91, which is convenient for replacing the memory card unit, and the data can be taken out and read when communication cannot be used.

[0135] Furthermore, the cloud data platform can remotely adjust the internal parameters and settings of the detector main control board 96. The internal parameters and settings of the detector main control board 96 include but are not limited to firmware update, state control, parameter reading and writing, data extraction and authority allocation.

[0136] like Figure 2 and Figure 3 As shown, the detector housing 91 includes a bottom box body 911, a middle enclosure 913, and a top cover plate 914;

[0137] The middle enclosure 913 is arranged above the bottom box body 911, and an intermediate cover plate 912 is arranged between the middle enclosure 913 and the bottom box body 911. A first enclosed area is formed between the intermediate cover plate 912 and the bottom box body 911, and a battery pack 98 and a battery management module 981 are arranged in the first enclosed area. A charging socket 982 is arranged on the bottom box body 911, and the charging socket 982, the battery pack 98 and the battery management module 981 are electrically connected;

[0138] The top cover plate 914 is arranged above the middle enclosure 913, and a second enclosed area is formed between the middle enclosure 913, the middle cover plate 912 and the top cover plate 914, and the gas sensor module 99, the air pump 94, the first air channel 991, the second air channel 992, the third air channel 993, the Internet of Things communication module 95 and the detector main control board 96 are all arranged in the second enclosed area;

[0139] The battery pack 98 can supply power to the Internet of Things communication module 95, the communication antenna 951 of the detector main control board 96, the satellite positioning antenna 952, the display screen and the operation panel 97, and the gas sensor module 99, so that automatic endurance can be achieved, and the battery pack 98 is isolated from the gas sensor module 99, the air pump 94, the first airway 991, the second airway 992, the third airway 993, the Internet of Things communication module 95, and the detector main control board 96, and the battery pack 98 is arranged at the bottom, which is convenient for the heat dissipation of the battery pack 98, making it safer. And this layered arrangement is more reasonable, which is conducive to reducing the volume; the battery pack 98 is arranged at the bottom, which can also lower the center of gravity, which is conducive to the stability of installation and carrying.

[0140] In some embodiments, the detector housing 91 is provided with a magnetic base 915 at the bottom, which is convenient for placing on a platform or bracket such as a car; the detector housing 91 is provided with mounting accessories, which is convenient for use with a drone or human carrying, thereby making the detector applicable to various usage scenarios.

[0141] The present invention provides an air detector device that has practical value and is compatible with various application scenarios and general drone technology, and has the following advantages:

[0142] 1. Precise and scientific measurement performance: practical measurement accuracy and time-sensitive sensitivity;

[0143] 2. Complete information acquisition function: In addition to air composition readings, it also has relevant information such as time and space location;

[0144] 3. Reliable and continuous two-way data communication: data and device status can be interconnected with the management platform (cloud data platform) in real time;

[0145] 4. Compatible with universal smart device data interface: conveniently match and work with drones and other devices;

[0146] 5. Rich mounting interfaces: Mounting interfaces suitable for various devices such as vehicles, individuals, drones, etc., which are convenient for fixing them in effective positions to better ensure collaborative tasks.

[0147] At the same time, in order to make the product practical, the following objective conditions must be met:

[0148] 1. Excellent environmental adaptability: long-term stable operation under low temperature, high temperature, high humidity, wind and sand, and natural oxidation corrosion conditions;

[0149] 2. Extremely low power consumption: ensure long-term independent use in outdoor passive scenarios;

[0150] 3. Small size and light weight: reduce the load of the personnel and meet the carrying performance of the UAV.

[0151] 4. Simple operation process: ensure high deployment and task efficiency.

[0152] The technical integration that meets the above conditions requires technical capabilities in multiple professional fields and relevant experience in multiple industry fields. The technical key points restrict each other, the boundary conditions are multi-dimensional and the adjustable range is small, and the research and development is difficult. This design combines the atmospheric composition monitoring methods under various mobile application scenarios, and integrates the spatial three-dimensional mobile data and time dimension with the collected data. It has complete functions, high detection accuracy, high detection timeliness, multiple adaptability scenarios, and high practicality.

[0153] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An atmospheric composition detector, characterized in that: include A detector housing (91), wherein the detector housing (91) is provided with a detector air inlet and a detector air outlet; A gas sensor module (99), the gas sensor module (99) being arranged in the detector housing (91), the gas sensor module (99) comprising a sensor module airway (2), an ionization inner space (12), an ultraviolet light generator (3) and a signal detection unit; the ionization inner space (12) being used to connect the sensor module air inlet (71) and the sensor module air outlet (72) of the sensor module airway (2), so that gas molecules can flow from the air inlet end of the sensor module airway (2) through the ionization inner space (12) and then flow into the air outlet end of the sensor module airway (2); the ultraviolet light generator (3) can provide energy for the gas molecules in the ionization inner space (12), so that the gas molecules in the ionization inner space (12) can be ionized, and the signal detection unit is used to detect the ionization signal of the gas molecules in the ionization inner space (12); An air pump (94), wherein the air pump (94) is disposed in the detector housing (91); A first air passage (991), the first air passage (991) being disposed in the detector housing (91), the first air passage (991) being connected to the detector air inlet and the sensor module air inlet (71); A second air channel (992), the second air channel (992) being disposed in the detector housing (91), the second air channel (992) being connected to the sensor module air outlet (72) and the air pump (94); A third air passage (993), wherein the third air passage (993) is disposed in the detector housing (91), and the third air passage (993) is connected to the air pump (94) and the air outlet of the detector.

2. An atmospheric composition detector according to claim 1, characterized in that: The detector air inlet is located at the top of the detector housing (91); an air inlet dust cover (921), an air inlet dust net (922) and an air inlet inner tube (923) are provided at the detector air inlet; the lower end of the air inlet inner tube (923) is connected to the air inlet end of the first air duct (991) through the detector air inlet; the air inlet dust cover (921) is sleeved on the outside of the air inlet inner tube (923); the air inlet dust net (922) is arranged in contact with the inner wall of the air inlet dust cover (921); a protective cover air inlet grille is provided on the side of the air inlet dust cover (921); the highest opening height of the protective cover air inlet grille is lower than the air inlet point height of the air inlet inner tube (923).

3. An atmospheric composition detector according to claim 1, characterized in that: A particle sensor (93) is also provided in the detector housing (91), and a splash-proof grille (931) is provided on the side of the detector housing (91), and the splash-proof grille (931) is provided corresponding to the particle sensor (93).

4. The atmospheric composition detector according to claim 1, characterized in that: An Internet of Things communication module (95) and a main control board (96) of the detector are also arranged inside the detector housing (91), and the Internet of Things communication module (95) is electrically connected to the main control board (96) of the detector. A communication antenna (951), a satellite positioning antenna (952), a display screen and an operation panel (97) are arranged outside the detector housing (91), and the Internet of Things communication module (95), the communication antenna (951), the satellite positioning antenna (952), the display screen and the operation panel (97) are all electrically connected to the main control board (96) of the detector. The gas sensor module (99) further comprises a sensor module main control board (421), the signal detection unit is electrically connected to a detection circuit on the sensor module main control board (421), and the sensor module main control board (421) is electrically connected to the detector main control board (96); The sensor module main control board (421) can obtain the detection data of the signal detection unit to form electrical signal detection data, the detector main control board (96) can obtain the electrical signal detection data of the sensor module main control board (421), and the detector main control board (96) can obtain the spatial data positioned by the satellite positioning antenna (952); the detector main control board (96) can combine the electrical signal detection data with the spatial data and display them through the display screen and the operation panel (97); the detector main control board (96) can combine the electrical signal detection data with the spatial data and transmit them to the cloud data platform through the Internet of Things communication module (95) and the communication antenna (951).

5. An atmospheric composition detector according to claim 4, characterized in that: It also includes a memory space, and when the network condition is poor and affects the data transmission between the detector main control board (96) and the cloud data platform, the memory space is used to temporarily store the data obtained by combining the electrical signal detection data and the spatial data; The detector main control board (96) also has an automatic data comparison module; when the automatic data comparison module detects that data is missing or lost during the communication between the detector main control board (96) and the cloud data platform, the detector main control board (96) will regularly report the data verification results and re-upload the missing data from the memory space to the cloud data platform.

6. An atmospheric composition detector according to claim 5, characterized in that: The memory space is an external memory card unit (910), and the external memory card unit (910) can be inserted into the detector housing (91); When the external memory card unit (910) is inserted into the detector housing (91), the external memory card unit (910) is electrically connected to the detector main control board (96); The external memory card unit (910) can be taken out from the detector housing (91).

7. An atmospheric composition detector according to claim 4, characterized in that: The cloud data platform can remotely adjust the internal parameters and settings of the detector main control board (96).

8. An atmospheric composition detector according to claim 7, characterized in that: The internal parameters and settings of the detector main control board (96) include but are not limited to firmware update, status control, parameter reading and writing, data extraction and authority allocation.

9. An atmospheric composition detector according to claim 4, characterized in that: The detector housing (91) comprises a bottom box body (911), a middle enclosure (913), and a top cover plate (914); The middle enclosure (913) is arranged above the bottom box body (911); an intermediate cover plate (912) is arranged between the middle enclosure (913) and the bottom box body (911); a first enclosed area is formed between the intermediate cover plate (912) and the bottom box body (911); a battery pack (98) and a battery management module (981) are arranged in the first enclosed area; a charging socket (982) is arranged on the bottom box body (911); the charging socket (982), the battery pack (98) and the battery management module (981) are electrically connected; The top cover plate (914) is arranged above the middle enclosure (913); a second enclosed area is formed between the middle enclosure (913), the intermediate cover plate (912) and the top cover plate (914); the gas sensor module (99), the air pump (94), the first air channel (991), the second air channel (992), the third air channel (993), the Internet of Things communication module (95) and the detector main control board (96) are all arranged in the second enclosed area; The battery pack (98) can supply power to the Internet of Things communication module (95), the detector main control board (96), the communication antenna (951), the satellite positioning antenna (952), the display screen and operation panel (97), and the gas sensor module (99).

10. An atmospheric composition detector according to claim 9, characterized in that: A magnetic base (915) is provided at the bottom of the detector housing (91); The detector housing (91) is provided with mounting accessories.

11. An atmospheric composition detector according to any one of claims 1 to 10, characterized in that: The gas sensor module (99) further comprises a sensor module housing and a sensor module main control board (421); The sensor module airway (2) is provided on the inner side of the sensor module housing, and the sensor module housing is provided with a sensor module air inlet (71) and a sensor module air outlet (72) which are connected to the inside and outside of the sensor module housing, the sensor module air inlet (71) is connected to the air inlet end of the sensor module airway (2) and the air outlet end of the first airway (991), and the sensor module air outlet (72) is connected to the air outlet end of the sensor module airway (2) and the air inlet end of the second airway (992); The sensor module main control board (421) and the ultraviolet light generator (3) are both arranged in the sensor module housing, and a detection circuit is arranged on the sensor module main control board (421); The signal detection unit comprises a high potential electrode and a low potential electrode; the high potential electrode and the low potential electrode are both arranged in the sensor module housing, the high potential electrode and the low potential electrode are both electrically connected to the detection circuit, and the low potential electrode and the high potential electrode can form an electric potential field in the ionization inner space (12) after being energized, and the electric potential field has a potential difference.

12. An atmospheric composition detector according to claim 11, characterized in that: The gas sensor module (99) further comprises an ionization chamber (1), wherein the ionization chamber (1) comprises an ionization chamber side wall (11), the ionization chamber inner space (12), an ionization chamber gas inlet and an ionization chamber gas outlet, wherein the ionization chamber inner space (12) is located in the ionization chamber side wall (11), and the ionization chamber side wall (11) is at least one of the high potential electrode and the low potential electrode, the ionization chamber body inlet is connected to one end of the sensor module airway (2) close to the sensor module air inlet (71) and the ionization chamber inner space (12), and the ionization chamber gas outlet is connected to one end of the sensor module airway (2) close to the sensor module air outlet (72) and the ionization chamber inner space (12).

13. An atmospheric composition detector according to claim 12, characterized in that: The gas sensor module (99) further comprises an inner needle (13), the inner cross-section of the ionization chamber side wall (11) is circular, the inner needle (13) is arranged in the radial middle of the ionization inner space (12), one of the inner needle (13) and the ionization chamber side wall (11) is a high potential electrode and the other is a low potential electrode, and the inner needle (13) and the ionization chamber side wall (11) can be energized to form the electric potential field; The ionization chamber gas inlet is a first hole (111), and the ionization chamber gas outlet is a second hole (112); the first hole (111) and the second hole (112) are arranged on the ionization chamber side wall (11); the first hole (111) is used to connect the sensor module gas passage (2) and the ionization inner space (12); and the second hole (112) is used to connect the sensor module gas passage (2) and the ionization inner space (12).

14. An atmospheric composition detector according to claim 13, characterized in that: The ultraviolet light generator (3) is arranged on one axial side of the ionization chamber side wall (11); one end of the ionization chamber side wall (11) provided with the ultraviolet light generator (3) has a third hole; an ultraviolet light generating interface (311) of the ultraviolet light generator (3) is directed toward the ionization inner space (12) through the third hole.

15. An atmospheric composition detector according to claim 14, characterized in that: The gas sensor module (99) further comprises a cleaning mechanism, the cleaning mechanism comprising a first motion mechanism, a second motion mechanism and a wiping member (55), the first motion mechanism being capable of driving the ultraviolet light generator (3) to move closer to or further away from the ionization chamber side wall (11), and the second motion mechanism being capable of controlling the wiping member (55) to swing; After the first motion mechanism controls the ultraviolet light generator (3) to move away from the ionization chamber side wall (11), the second motion mechanism can control the wiping member (55) to swing and wipe the ultraviolet light generating interface (311) of the ultraviolet light generator (3).

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