Two-stage superfine particulate matter detection device capable of continuously measuring

Abstract

The invention discloses a two-stage ultrafine particulate matter detection device capable of continuously measuring, which belongs to the field of gas particulate matter detection and testing and comprises a first-stage detection device and a second-stage detection device which are connected in sequence, the first-stage detection device is used for collecting first temperature information of the ultrafine particles and carrying out first-stage detection on the ultrafine particles by using different channels according to the first temperature information to obtain a first-stage detection result, and the second-stage detection device is used for collecting second temperature information of the ultrafine particles subjected to the first-stage detection and carrying out second-stage detection on the ultrafine particles subjected to the second-stage detection to obtain a second-stage detection result; and according to the second temperature information, performing second-stage detection on the ultrafine particles subjected to the first-stage detection by using different channels to obtain the quantity and concentration information of the ultrafine particles subjected to the second-stage detection. The detection precision is improved through secondary detection, continuous application detection of high and low temperature scenes can be realized, the environmental temperature adaptability of detection is improved, and meanwhile, the detection efficiency and the detection convenience are also improved.

Description

Technical Field

[0001] The invention belongs to the technical field of atmospheric pollution particle emission testing and control and environmental monitoring, and in particular relates to a two-stage ultrafine particle detection device capable of continuous measurement. Background Art

[0002] The current ultrafine particle detection technology is based on the particle condensation growth and light scattering principle, electromigration principle, aerodynamic principle, diffusion charging principle, acoustic-optical combined measurement principle, etc. These detection technologies are all completed at one time, and there are problems such as system parameter deviation, small temperature range of detected particles, limited detection sensitivity and easy error, poor environmental adaptability leading to low detection accuracy, etc.

[0003] One-time testing has shortcomings in terms of accuracy, uncertainty, and information adequacy. When completing the test at one time, the diffusion effect of ultrafine particles in the sampling channel is not considered, and the changes in the charge characteristics and particle size distribution of the particles are ignored. The particle size growth and concentration changes caused by the agglomeration of particles during the test cannot be effectively detected, thereby reducing the actual measurement accuracy. When completing the test at one time, discontinuity may occur due to sensitivity and response issues, which in turn affects the accuracy of the measurement results. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a two-stage ultrafine particle detection device capable of continuous measurement to solve the above problems existing in the prior art.

[0005] To achieve the above object, the present invention provides a two-stage ultrafine particle detection device capable of continuous measurement, comprising:

[0006] A primary detection device and a secondary detection device are connected in sequence; the primary detection device is used to collect first temperature information of ultrafine particles, and use different channels to perform primary detection on the ultrafine particles according to the first temperature information to obtain a primary detection result, and the secondary detection device is used to collect second temperature information of the ultrafine particles after the primary detection, and use different channels to perform secondary detection on the ultrafine particles after the primary detection according to the second temperature information to obtain the number and concentration information of the ultrafine particles after the secondary detection.

[0007] Optionally, the primary detection device includes a sampling pipeline, a primary temperature sensor, a temperature signal processing module, a temperature judgment module and a primary particle detection device;

[0008] The primary temperature sensor is arranged inside the sampling pipeline, the sampling pipeline is connected to the primary particle detection device, the primary temperature sensor, the temperature signal processing module, and the temperature judgment module are connected in sequence, and the temperature judgment module is connected to the primary particle detection device to control the channel selection of the primary particle detection device;

[0009] Gas containing ultrafine particles is collected through a sampling pipeline, first temperature information of the ultrafine particles is collected through a primary temperature sensor, a threshold judgment is performed on the first temperature information processed by a temperature signal processing module through a temperature judgment module, a channel is selected for the primary particle detection device according to the threshold judgment result of the first temperature information, and different channels are selected through the primary particle detection device to perform primary detection of ultrafine particles.

[0010] Optionally, the primary particle detection device includes a primary low-temperature detection channel and a primary high-temperature detection channel connected in parallel;

[0011] A first-level low-temperature particle detection sensor is arranged inside the first-level low-temperature detection channel; a first-level desiccant and a first-level high-temperature particle detection sensor are arranged inside the first-level high-temperature detection channel, wherein the first-level desiccant is located closer to the input end of the second-level high-temperature detection channel than the first-level high-temperature particle detection sensor;

[0012] In the threshold judgment result of the first temperature information, when the processed first temperature information is less than or equal to the first threshold, the first-level low-temperature detection channel is selected and turned on, and the concentration and quantity of ultrafine particles are detected by the first-level low-temperature particle detection sensor to obtain a first-level detection result; when the processed first temperature information is greater than the first threshold, the first-level high-temperature detection channel is selected and turned on, the ultrafine particles are dried by the first-level desiccant, and the concentration and quantity of the dried ultrafine particles are detected by the first-level high-temperature particle detection sensor to obtain a first-level detection result.

[0013] Optionally, the first threshold is 200°C.

[0014] Optionally, the secondary detection device includes a secondary desiccant, a secondary temperature sensor, a primary particle sampling signal processing unit, a secondary particle detection device and a secondary particle sampling signal processing unit;

[0015] The primary detection device is connected to the secondary particle detection device through a pipeline, and a secondary desiccant and a secondary temperature sensor are arranged inside the connected pipeline, wherein the secondary desiccant is located closer to the output end of the primary detection device than the secondary temperature sensor; the secondary temperature sensor is connected to the primary particle sampling signal processing unit, and the primary particle sampling signal processing unit is connected to the secondary particle detection device to control the channel selection of the secondary particle detection device; the secondary particle sampling signal processing unit is connected to the secondary particle detection device to obtain a secondary detection result;

[0016] The ultrafine particles detected once are dried by a secondary desiccant, and the dried ultrafine particles are detected by a secondary temperature sensor to obtain second temperature information. A threshold value judgment is performed on the second temperature information by a primary particle sampling signal processing unit, and a channel is selected for the secondary particle detection device according to the threshold judgment result of the second temperature information. Different channels are selected by the secondary particle detection device to perform secondary detection on the dried ultrafine particles; and the secondary detection result is obtained by the secondary particle sampling signal processing unit.

[0017] Optionally, the secondary particle detection device comprises a secondary low-temperature detection channel and a secondary high-temperature detection channel connected in parallel, wherein a secondary low-temperature particle detection sensor is provided in the secondary low-temperature detection channel; and a secondary high-temperature particle detection sensor is provided in the secondary high-temperature detection channel;

[0018] In the threshold judgment result of the second temperature information, when the second temperature information is less than or equal to the second threshold, the secondary low-temperature detection channel is selected and turned on, and the concentration and quantity of the dried ultrafine particles are detected by the secondary low-temperature particle detection sensor to obtain the secondary detection result; when the second temperature information is greater than the second threshold, the secondary high-temperature detection channel is selected and turned on, and the concentration and quantity of the dried ultrafine particles are detected by the secondary high-temperature particle detection sensor to obtain the secondary detection result.

[0019] Optionally, the second threshold is 500°C.

[0020] Optionally, the secondary detection device is further provided with an information management module, wherein the information management module is connected to the primary particulate matter sampling signal processing unit and the secondary particulate matter sampling signal processing unit;

[0021] The primary particulate matter sampling signal processing unit is connected to the primary detection device to obtain a primary detection result;

[0022] The information management module is used to perform information management on the primary detection results and the secondary detection results, wherein the information management includes single-channel or overall display, storage and sharing of the primary detection results and the secondary detection results.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] The present invention proposes a two-stage ultrafine particle detection device capable of continuous measurement. The device involves two particle detection stages, primary detection and secondary detection, and can achieve continuous and accurate ultrafine particle detection. It has the advantages of being able to achieve continuous measurement, wide range of ambient temperature and scene applicability, miniaturization and portability, data accuracy and reliability. The present invention proposes a two-stage ultrafine particle detection device capable of continuous measurement, which can provide more accurate and comprehensive ultrafine particle monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic diagram of a device flow chart of an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of a device according to an embodiment of the present invention;

[0028] Among them, 1. Sampling pipeline; 2. First-level temperature sensor; 3. Temperature signal processing module; 4. Temperature judgment module; 5. First-level low-temperature detection channel; 6. First-level low-temperature particle detection sensor; 7. First-level desiccant; 8. First-level high-temperature detection channel; 9. First-level high-temperature particle detection sensor; 10. Second-level desiccant; 11. Second-level temperature sensor; 12. First-level particle sampling signal processing unit; 13. Second-level low-temperature detection channel; 14. Second-level low-temperature particle detection sensor; 15. Second-level high-temperature detection channel; 16. Second-level high-temperature particle detection sensor; 17. Second-level particle sampling signal processing unit; 18. Single channel detection data display module; 19. Overall detection data display module; 20. Detection data storage unit; 21. Detection data sharing module. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0031] like Figure 1-2 As shown, in this embodiment, a two-stage ultrafine particle detection device capable of continuous measurement is provided, comprising:

[0032] Primary detection device and secondary detection device;

[0033] The primary detection device is used to perform primary detection on the ultrafine particles according to the first temperature information, and the secondary detection device is used to perform secondary detection on the ultrafine particles after the primary detection according to the second temperature information to obtain the concentration information of the ultrafine particles.

[0034] As some embodiments, the primary detection device includes a sampling pipeline 1, a primary temperature sensor 2, a temperature signal processing module 3, a temperature judgment module 4 and a primary particulate matter detection device.

[0035] A primary temperature sensor 2 is fixedly arranged inside the sampling pipeline 1, and the primary temperature sensor 2, the temperature signal processing module 3, the temperature judgment module 4 and the primary particle detection device are connected in sequence; the sampling pipeline 1 is connected to the primary particle detection device, and the opening and closing of different channels of the primary particle detection device are connected and controlled by the temperature judgment module 4.

[0036] Gas containing ultrafine particles is transported through a sampling pipeline 1, and the temperature information (first temperature information) of the ultrafine particles is detected by a primary temperature sensor 2. After the detection, relevant processing (amplification, filtering, etc.) is performed through a temperature signal processing module 3, and a threshold judgment is performed on the processed first temperature information through a temperature judgment module 4. The channel selection of a primary particle detection device is controlled according to the threshold judgment result, and a primary detection of ultrafine particles is performed through the primary particle detection device.

[0037] Specifically, the primary particle detection device adopts a parallel double branch (channel) structure, including a first branch structure and a second branch structure; wherein the first branch structure includes a primary low temperature detection channel 5 and a primary low temperature particle detection sensor 6, and the primary low temperature particle detection sensor 6 is arranged inside or at the end of the primary low temperature detection channel 5; the second branch structure includes a primary desiccant 7, a primary high temperature detection channel 8, and a primary high temperature particle detection sensor 9, wherein the primary desiccant is arranged at the input end or the front half of the first high temperature detection channel 8, and the primary high temperature particle detection sensor 9 is arranged at the end or the rear half of the first high temperature detection channel 8. It should be noted that for the double branch (pass) structure, in the process of channel selection, the temperature judgment module 4 includes a processor for temperature judgment and a channel switch. After temperature judgment, an electrically controlled channel switch is used to select the channel. The channel switch can adopt an electric control valve or other structures that rely on electrical signals to control the opening and closing of the channel. Those skilled in the art can conventionally implement it, and will not be repeated here.

[0038] When the first temperature information is lower than or equal to the first threshold value (200°C), the first branch structure is selected and turned on to perform a first-level low-temperature detection on the ultrafine particles, wherein the ultrafine particles are transmitted through the first-level low-temperature detection channel 5, and the concentration and quantity of the ultrafine particles are detected through the first-level low-temperature particle detection sensor 6.

[0039] When the first temperature information is higher than the first threshold value (200°C), the second branch structure is selected and turned on to perform a first-level high-temperature detection on the ultrafine particles, wherein the ultrafine particles are first dried by the first-level desiccant 7 to reduce the influence of the water vapor of the ultrafine particles under the high temperature state on the high-temperature particle detection sensor, the ultrafine particles are transmitted through the first-level high-temperature detection channel 8, and the concentration and quantity of the ultrafine particles are detected by the first-level high-temperature particle detection sensor 9 to complete the first-level detection of the ultrafine particles.

[0040] As some embodiments, the secondary detection device includes a secondary desiccant 10, a secondary temperature sensor 11, a primary particle sampling signal processing unit 12, a secondary particle detection device, a secondary particle sampling signal processing unit 17 and an information management module.

[0041] Among them, a secondary desiccant 10 is arranged at the output end of the primary particle detection device and is connected to the secondary particle detection device through a pipeline. A secondary temperature sensor 11 is arranged inside the pipeline after the secondary desiccant 10 and before the secondary particle detection device. The secondary temperature sensor 11 is connected to the primary particle sampling signal processing unit 12. The primary particle sampling signal processing unit 12 is connected to the secondary particle detection device to control the opening and closing of different channels of the secondary particle detection device.

[0042] The secondary particle sampling signal processing unit 17 is connected to the sensor in the secondary particle detection device to obtain the detection signal.

[0043] The primary particle sampling signal processing unit 12 is also connected to the primary low-temperature particle detection sensor 6 and the primary high-temperature particle detection sensor 9 .

[0044] The information management module is connected to the primary particulate matter sampling signal processing unit 12 and the secondary particulate matter sampling signal processing unit 17 .

[0045] The ultrafine particles that have passed the primary detection are further subjected to secondary drying by the secondary desiccant 10, the temperature information (second temperature information) of the ultrafine particles after the secondary drying is detected by the secondary temperature sensor 11, and the second temperature information is subjected to threshold judgment by the primary particle sampling signal processing unit 12, and the channel selection of the secondary particle detection device is controlled according to the threshold judgment result. At the same time, the primary particle sampling signal processing unit 12 collects and processes the concentration and quantity of the ultrafine particles obtained by the primary detection, and the secondary particle detection device performs secondary detection on the ultrafine particles after the first detection. After the secondary detection, the signal after the secondary detection is collected and processed by the secondary particle sampling signal processing unit 17, and the single channel and the overall detection data are displayed, stored and shared through the information management module.

[0046] The relevant processing operations in the primary particle sampling signal processing unit 12 and the secondary particle sampling signal processing unit 17 include signal filtering processing operations such as the particle flow velocity signal, flow state signal, electrode change signal, and electrode voltage signal. The processing operations can be set and implemented according to the experience of relevant personnel in this field, and will not be elaborated here.

[0047] It should be noted that, for the dual-branch (pass) structure, during the channel selection process, the first-level particulate matter sampling signal processing unit 12 includes a processor and a channel switch for collecting relevant data and temperature judgment. After temperature judgment, an electrically controlled channel switch is used to select the channel. The channel switch can use an electric control valve or other structure that relies on electrical signals to control the opening and closing of the channel. Those skilled in the art can implement it conventionally and will not be elaborated here.

[0048] Specifically, the secondary particle matter detection device also adopts a parallel dual-branch (channel) structure, including a third branch structure and a fourth branch structure, wherein the third branch structure includes a secondary low-temperature detection channel 13 and a secondary low-temperature particle matter detection sensor 14, and the secondary low-temperature particle matter detection sensor 14 is arranged inside or at the end of the secondary low-temperature detection channel 13, and the fourth branch structure includes a secondary high-temperature detection channel 15 and a secondary high-temperature particle matter detection sensor 16, and the secondary high-temperature particle matter detection sensor 16 is arranged inside or at the end of the secondary high-temperature detection channel 15.

[0049] When the first temperature information is lower than or equal to the second threshold value (500° C.), the third branch structure is selected and opened to perform secondary low-temperature detection on the ultrafine particles after the primary detection, wherein the ultrafine particles after the primary detection are transmitted through the secondary low-temperature detection channel 13, and the concentration and quantity of the ultrafine particles after the primary detection are detected through the secondary low-temperature particle detection sensor 14;

[0050] When the first temperature information is higher than the second threshold value (500°C), the fourth branch structure is selected and turned on to perform a secondary high temperature detection on the ultrafine particles after the primary detection, wherein the ultrafine particles after the primary detection are transmitted through the secondary high temperature detection channel 15, and the concentration and quantity of the ultrafine particles after the primary detection are detected through the secondary high temperature particle detection sensor 16 to complete the secondary detection of the ultrafine particles.

[0051] It should be noted that the upper temperature limit of ultrafine particles is 850°C. Electronic components cannot be detected beyond this temperature limit. As a supplementary note, components with higher temperature limits or better performance can be used for related tests, which will not be elaborated here.

[0052] Specifically, the information management module includes a single channel detection data display module 18, an overall detection data display module 19, a detection data storage unit 20 and a detection data sharing module 21, which are respectively used for displaying single channel detection data, displaying overall detection data, storing detection data and sharing detection data.

[0053] Among them, the single channel detection data display module 18 can choose to use a display device such as a display screen, and adopt a single interface to connect the primary particle sampling signal processing unit 12 or the secondary particle sampling signal processing unit 17, and collect and display the data collected in the primary low temperature detection channel 5, the primary high temperature detection channel 8, the secondary low temperature detection channel 13 and the secondary high temperature detection channel 15, that is, the detection signal collected by the primary particle sampling signal processing unit 12 or the secondary particle sampling signal processing unit 17 (the primary or secondary detection results of ultrafine particles, including the concentration and quantity of ultrafine particles);

[0054] The overall detection data display module 19 can select a display device such as a display screen, and adopt a multi-interface method to connect the primary particulate matter sampling signal processing unit 12 and the secondary particulate matter sampling signal processing unit 17 to collect and display the detection signals collected by the primary particulate matter sampling signal processing unit 12 and the secondary particulate matter sampling signal processing unit 17;

[0055] The detection data storage unit 20 may choose to use a storage device such as a memory to store the detection signals collected by the primary particle sampling signal processing unit 12 and the secondary particle sampling signal processing unit 17, and may also store the corresponding ultrafine particles such as the collection location, time or other marking information locally or in the cloud.

[0056] The detection data sharing module 21 can select communication devices such as computers or communication interfaces to share the above detection signals through different network communication methods or a cloud database with a multi-query structure, so as to facilitate data query and analysis by relevant personnel.

[0057] Among them, the sampling pipeline 1, the first-level low-temperature detection channel 5, the first-level high-temperature detection channel 8, the second-level low-temperature detection channel 13, and the second-level high-temperature detection channel 15 can adopt a gas pipeline with good sealing performance and other structures for transmitting gas.

[0058] The primary low-temperature particle detection sensor 6 and the secondary low-temperature particle detection sensor 14 may adopt ECM-pmCAN sensors.

[0059] The primary high temperature particle detection sensor 9 and the secondary high temperature particle detection sensor 16 may adopt pegasor-PPS sensors.

[0060] The temperature signal processing module 3, the temperature judgment module 4, the primary particulate matter sampling signal processing unit 12, and the secondary particulate matter sampling signal processing unit 17 can adopt related single chip microcomputers, microprocessor chips or related computing devices.

[0061] The primary desiccant 7 and the secondary desiccant 10 may be the same or different gas desiccants. The gas desiccant is a desiccant used for drying gas, such as anhydrous calcium chloride.

[0062] In conjunction with the following drawings, the detection process of the present invention is described as follows:

[0063] like Figure 1-2 The present invention proposes a two-stage ultrafine particle detection device capable of continuous measurement, which is used for continuous measurement of ultrafine particles. The device comprises a primary detection device and a secondary detection device, which are divided into a primary detection stage and a secondary detection stage. It should be noted that: Figure 1 The main display is an exemplary device flow chart related to gas detection or data collection of the device in the present invention. Figure 2 The main display is the structural diagram of the device in the present invention. Figure 2 In the figure, the dotted line connection represents the electrical or signal communication connection, and the solid line represents the connection of different pipelines or channels using pipelines.

[0064] The ultrafine particle gas in the sampling pipeline 1 entering the first-level detection stage passes through the first-level temperature sensor 2 set in the first-level detection stage. After the first-level temperature sensor 2 collects and obtains the initial temperature of the particles and converts it into a temperature signal (first temperature information), the temperature signal processing module 3 receives the signal of the first-level temperature sensor 2 and performs necessary processing (such as amplification, filtering, etc.). The temperature judgment module 4 judges the current temperature range according to the processed temperature signal and determines the subsequent high and low temperature detection channel selection. If the temperature of the ultrafine particles is lower than 200°C, it enters the first-level low temperature detection channel 5, and the first-level low temperature particle detection sensor 6 measures the concentration and quantity of ultrafine particles under the temperature condition lower than 200°C. If the temperature of the ultrafine particles is higher than 200°C (the highest temperature does not exceed 850°C), the detection accuracy of the high temperature particle sensor is greatly affected by water vapor. To prevent water vapor from affecting the detection results, it needs to be dried by the first-level desiccant 7 to remove moisture in the air before entering the first-level high temperature detection channel 8. The first-level high temperature particle detection sensor 9 is used to detect the number and concentration of ultrafine particles in the temperature range of 200°C to 850°C.

[0065] The particles that have completed the primary detection will enter the secondary desiccant 10 for further drying. After the secondary temperature sensor 11 performs temperature detection, the primary particle sampling signal processing unit 12 will simultaneously process the primary detection quantity, concentration and temperature data (second temperature information) of the secondary temperature sensor 11, and perform high and low temperature judgment again. If the temperature is less than 500°C, it will enter the secondary low temperature detection channel 13, and the secondary low temperature particle detection sensor 14 will start working. If the temperature is greater than 500°C but less than 850°C, it will enter the secondary high temperature detection channel 15, and the secondary high temperature particle detection sensor 16 will start the detection work to detect the number and concentration of ultrafine particles at the secondary level. After the secondary detection signal is processed by the secondary particle sampling signal processing unit 17, it can be displayed by a single channel and the overall detection data, and the detection data can be stored and shared in real time.

[0066] The present invention provides a two-stage ultrafine particle detection device that can continuously measure, which improves the detection accuracy through two-stage detection, and can realize continuous application detection in high and low temperature scenes, thereby improving the adaptability of the detection to the ambient temperature, and also improving the detection efficiency and convenience.

[0067] The advantage of the two-stage ultrafine particle detection technology that can be continuously measured proposed by the present invention is that it can continuously and accurately measure the concentration of ultrafine particles at different temperatures, thereby providing accurate data for environmental monitoring, industrial process control and other fields.

[0068] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A two-stage ultrafine particle detection device capable of continuous measurement, characterized in that: include: A primary detection device and a secondary detection device are connected in sequence; the primary detection device is used to collect first temperature information of ultrafine particles, and use different channels to perform primary detection on the ultrafine particles according to the first temperature information to obtain a primary detection result, and the secondary detection device is used to collect second temperature information of the ultrafine particles after the primary detection, and use different channels to perform secondary detection on the ultrafine particles after the primary detection according to the second temperature information to obtain the number and concentration information of the ultrafine particles after the secondary detection.

2. The device according to claim 1, characterized in that The primary detection device includes a sampling pipeline, a primary temperature sensor, a temperature signal processing module, a temperature judgment module and a primary particle detection device; The primary temperature sensor is arranged inside the sampling pipeline, the sampling pipeline is connected to the primary particle detection device, the primary temperature sensor, the temperature signal processing module, and the temperature judgment module are connected in sequence, and the temperature judgment module is connected to the primary particle detection device to control the channel selection of the primary particle detection device; Gas containing ultrafine particles is collected through a sampling pipeline, first temperature information of the ultrafine particles is collected through a primary temperature sensor, a threshold judgment is performed on the first temperature information processed by a temperature signal processing module through a temperature judgment module, a channel is selected for the primary particle detection device according to the threshold judgment result of the first temperature information, and different channels are selected through the primary particle detection device to perform primary detection of ultrafine particles.

3. The device according to claim 2, characterized in that The primary particle detection device comprises a primary low temperature detection channel and a primary high temperature detection channel connected in parallel; A first-level low-temperature particle detection sensor is arranged inside the first-level low-temperature detection channel; a first-level desiccant and a first-level high-temperature particle detection sensor are arranged inside the first-level high-temperature detection channel, wherein the first-level desiccant is located closer to the input end of the second-level high-temperature detection channel than the first-level high-temperature particle detection sensor; In the threshold judgment result of the first temperature information, when the processed first temperature information is less than or equal to the first threshold, the first-level low-temperature detection channel is selected and turned on, and the concentration and quantity of ultrafine particles are detected by the first-level low-temperature particle detection sensor to obtain a first-level detection result; when the processed first temperature information is greater than the first threshold, the first-level high-temperature detection channel is selected and turned on, the ultrafine particles are dried by the first-level desiccant, and the concentration and quantity of the dried ultrafine particles are detected by the first-level high-temperature particle detection sensor to obtain a first-level detection result.

4. The device according to claim 3, characterized in that The first threshold is 200°C.

5. The device according to claim 1, characterized in that The secondary detection device includes a secondary desiccant, a secondary temperature sensor, a primary particle sampling signal processing unit, a secondary particle detection device and a secondary particle sampling signal processing unit; The primary detection device is connected to the secondary particle detection device through a pipeline, and a secondary desiccant and a secondary temperature sensor are arranged inside the connected pipeline, wherein the secondary desiccant is located closer to the output end of the primary detection device than the secondary temperature sensor; the secondary temperature sensor is connected to the primary particle sampling signal processing unit, and the primary particle sampling signal processing unit is connected to the secondary particle detection device to control the channel selection of the secondary particle detection device; the secondary particle sampling signal processing unit is connected to the secondary particle detection device to obtain a secondary detection result; The ultrafine particles detected once are dried by a secondary desiccant, the dried ultrafine particles are detected by a secondary temperature sensor to obtain second temperature information, a threshold value is judged on the second temperature information by a primary particle sampling signal processing unit, a channel is selected for the secondary particle detection device according to the threshold value judgment result of the second temperature information, and different channels are selected by the secondary particle detection device to perform secondary detection on the dried ultrafine particles; The secondary detection results are obtained through the secondary particulate matter sampling signal processing unit.

6. The device according to claim 5, characterized in that The secondary particle detection device comprises a secondary low-temperature detection channel and a secondary high-temperature detection channel connected in parallel, wherein a secondary low-temperature particle detection sensor is provided in the secondary low-temperature detection channel; and a secondary high-temperature particle detection sensor is provided in the secondary high-temperature detection channel; In the threshold judgment result of the second temperature information, when the second temperature information is less than or equal to the second threshold, the secondary low-temperature detection channel is selected and turned on, and the concentration and quantity of the dried ultrafine particles are detected by the secondary low-temperature particle detection sensor to obtain the secondary detection result; when the second temperature information is greater than the second threshold, the secondary high-temperature detection channel is selected and turned on, and the concentration and quantity of the dried ultrafine particles are detected by the secondary high-temperature particle detection sensor to obtain the secondary detection result.

7. The device according to claim 6, characterized in that The second threshold is 500°C.

8. The device according to claim 4, characterized in that The secondary detection device is also provided with an information management module, wherein the information management module is connected with the primary particulate matter sampling signal processing unit and the secondary particulate matter sampling signal processing unit; The primary particulate matter sampling signal processing unit is connected to the primary detection device to obtain a primary detection result; The information management module is used to perform information management on the primary detection results and the secondary detection results, wherein the information management includes single-channel or overall display, storage and sharing of the primary detection results and the secondary detection results.

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