Platform for testing temperature response characteristics of biological aerosol sensor

Abstract

The invention provides a platform for testing the temperature response characteristic of a biological aerosol sensor, and relates to the technical field of environment monitoring equipment and sensor testing, and the platform comprises an environment control cabin which is used for simulating and maintaining a wide temperature and humidity condition; the to-be-tested biological aerosol sensor interface is arranged in the environment control cabin and is used for accommodating a to-be-tested biological aerosol sensor and carrying out physical and data interface with the to-be-tested biological aerosol sensor; the aerosol generation and transmission system is used for generating and stably conveying standard particles and / or biological aerosol samples with known particle sizes; and the data acquisition and control module is used for synchronously acquiring data of the environment sensor and original data such as particle size, scattered light and multispectral fluorescence output by the bioaerosol sensor to be tested, and realizing automatic control and data storage and analysis in the testing process. According to the method, a reliable data basis can be provided for performance evaluation, temperature response mechanism analysis and adaptive compensation model development of the biological aerosol sensor under different temperature and humidity conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental monitoring equipment and sensor testing technology, and particularly relates to a platform for testing temperature response characteristics of a bioaerosol sensor. BACKGROUND

[0002] Bioaerosols have important significance in the fields of agriculture, public health, environmental science, etc. Real-time bioaerosol sensors, such as ultraviolet aerodynamic particle sizers (UV-APS) and wideband integrated bioaerosol sensors (WIBS), have become important tools for monitoring biological particles in the air by measuring particle size, scattered light intensity, and laser-induced fluorescence signals.

[0003] However, these bioaerosol sensors often face the problem of dramatic fluctuations in environmental factors in actual application environments, especially in outdoor agricultural environments, among which temperature is a key factor affecting their performance. Temperature changes can cause performance drift of internal components of the sensor (such as lasers, PMTs (Photomultiplier Tubes), optical elements), changes in air physical parameters (such as density, viscosity, refractive index), thereby affecting the accuracy of particle size measurement, and causing distortion of the detected bioaerosol signal intensity and fluorescence fingerprint, making the data output by the sensor under different temperature conditions lack consistency and accuracy, and severely limiting its reliability in actual applications.

[0004] Therefore, how to systematically, multi-dimensionally, and high-precisely test and characterize the temperature response characteristics of bioaerosol sensors to obtain underlying data for adaptive compensation model development is a problem to be solved at present. SUMMARY

[0005] The present application provides a platform for testing temperature response characteristics of a bioaerosol sensor to solve the defect in the prior art that there is a lack of tools that can systematically and high-precisely evaluate the performance response of bioaerosol sensors under wide temperature and humidity conditions, and by means of high-precision environmental control, stable aerosol generation and transmission, and multi-parameter synchronous acquisition and analysis functions, to provide reliable basic data for bioaerosol sensor performance evaluation and data compensation model development.

[0006] The present application provides a platform for testing temperature response characteristics of a bioaerosol sensor, comprising: an environmental control cabin for simulating and maintaining a preset temperature range and humidity condition; A biological aerosol sensor interface is arranged inside the environmental control cabin and used to accommodate the biological aerosol sensor under test and physically and data interface with the biological aerosol sensor under test. An aerosol generation and transmission system includes an aerosol generator module and an aerosol transmission module, the aerosol generator module is used to generate standard particles and / or biological aerosol samples with known particle sizes, and the aerosol transmission module is used to transport the standard particles and / or the biological aerosol samples into the environmental control cabin and into the sampling port of the biological aerosol sensor under test. A data acquisition and control module includes a data acquisition unit, a control unit and a data storage and analysis unit, the data acquisition unit is used to synchronously acquire environmental sensor data arranged in the environmental control cabin and raw data output by the biological aerosol sensor under test, the control unit is used to set and control temperature and humidity cycle curves of the environmental control cabin, operating parameters of the aerosol generator module and flow of the aerosol transmission module, and the data storage and analysis unit is used to store and analyze acquired data.

[0007] According to the platform for testing temperature response characteristics of biological aerosol sensors provided by the application, the environmental control cabin is used to simulate and maintain a temperature range of-20-50℃ and a humidity condition with relative humidity from less than 20% to more than 90%.

[0008] According to the platform for testing temperature response characteristics of biological aerosol sensors provided by the application, the environmental control cabin is further provided with an airflow uniform distribution system, which is used to ensure that temperature and humidity fields at each point in the environmental control cabin are uniform.

[0009] According to the platform for testing temperature response characteristics of biological aerosol sensors provided by the application, the biological aerosol sensor interface under test is designed to be modular or adjustable, which is used to adapt to biological aerosol sensors of different models and sizes.

[0010] According to the platform for testing temperature response characteristics of biological aerosol sensors provided by the application, the standard particles with known particle sizes include polystyrene latex particles and fluorescent microspheres; the aerosol generator module is used to atomize the particle suspension into droplets, remove water to obtain solid particles, and grade the solid particles to obtain standard particles with known particle sizes. The biological aerosol sample includes typical agricultural fungal spores, pollen or bacteria; the aerosol generator module is further used to process the microbial suspension through atomization and drying to obtain a biological aerosol sample.

[0011] According to the platform for testing the temperature response characteristics of a bioaerosol sensor, the aerosol transmission module is made of an inert material, so as to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the wall of the tube. The aerosol transmission module is provided with an electrostatic elimination unit, so as to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the wall of the tube.

[0012] According to the platform for testing the temperature response characteristics of a bioaerosol sensor, the data acquisition unit converts the analog signals output by the environmental sensors in the environmental control cabin into environmental sensor data and converts the analog signals output by the bioaerosol sensor to be tested into original data through an analog-to-digital converter.

[0013] According to the platform for testing the temperature response characteristics of a bioaerosol sensor, the control unit is used for automatic cyclic testing of preset test parameters and automatic acquisition of data.

[0014] According to the platform for testing the temperature response characteristics of a bioaerosol sensor, the original data output by the bioaerosol sensor to be tested include at least one parameter of a particle size measurement value, a scattered light signal intensity and signal intensities of at least two fluorescence channels. The data storage and analysis unit is used for drawing curves of each parameter with respect to temperature and humidity, so as to show the temperature response characteristics of the bioaerosol sensor to be tested, and is used for calculating statistical indexes, wherein the statistical indexes include at least one of an average value, a standard deviation and a coefficient of variation of the original data output by the bioaerosol sensor to be tested at each temperature and humidity point.

[0015] According to the platform for testing the temperature response characteristics of a bioaerosol sensor, the data storage and analysis unit is further used for analyzing the signal intensity data of the at least two fluorescence channels, so as to evaluate the influence of temperature and humidity on fluorescence fingerprints. The data storage and analysis unit is further used for displaying the test progress and test data in real time through a graphical user interface and generating a test report according to a preset report template.

[0016] The platform for testing the temperature response characteristics of a bioaerosol sensor provided by the application provides a precise and stable temperature and humidity control environment through an environmental control cabin, can simulate a wide range of temperature and humidity conditions in a real agricultural environment, ensures the accuracy and repeatability of test results, and lays a foundation for bioaerosol sensor performance evaluation; through integration of a high-precision environmental control cabin, an aerosol generation and transmission system, a bioaerosol sensor interface to be tested, and a data acquisition and control module, the key performance indicators of the bioaerosol sensor under different temperature and humidity conditions can be comprehensively and systematically tested, and the overall influence of temperature on the multi-parameter response of the sensor is revealed; through the automated data acquisition and control module, automatic cyclic testing of preset test parameters and automatic data acquisition can be realized, the testing efficiency is significantly improved, manual intervention and operation errors are reduced, the labor and time costs are greatly saved, and reliable and detailed experimental data for in-depth analysis of the temperature influence mechanism and development of a high-precision sensor adaptive compensation model can be systematically obtained, so as to improve the environmental adaptability and measurement accuracy of the sensor; the platform for testing the temperature response characteristics of a bioaerosol sensor has good universality and expandability, and wide application fields through the use of modular and adjustable interface design, and can be compatible with various types of bioaerosol sensors and various aerosol samples; through accurate characterization of the temperature response characteristics of the bioaerosol sensor, the sensor manufacturer can be guided to improve the sensor design and optimize the hardware performance and algorithm, so as to promote the reliable application of the bioaerosol monitoring technology in complex environments such as outdoor agriculture and agricultural environments, and provide more accurate data support for environmental monitoring and public health fields. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 is one of the structural schematic diagrams of the platform for testing the temperature response characteristics of a bioaerosol sensor provided by the embodiments of the application.

[0019] Figure 2 is the second structural schematic diagram of the platform for testing the temperature response characteristics of a bioaerosol sensor provided by the embodiments of the application. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described below in connection with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] In the description of the embodiments of the present application, the terms "comprising", "containing" or any other variants thereof are intended to cover the non-exclusive containing, so that the processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such processes, methods, articles or devices. The specific meanings of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

[0022] Figure 1 is one of the structural schematic diagrams of the platform for testing the temperature response characteristics of bioaerosol sensors provided by the embodiments of the present application. Referring to Figure 1 , the embodiments of the present application provide a platform for testing the temperature response characteristics of bioaerosol sensors, which comprises: an environment control cabin 110 for simulating and maintaining a preset temperature range and humidity condition; a to-be-tested bioaerosol sensor interface 120 arranged inside the environment control cabin and used for accommodating a to-be-tested bioaerosol sensor and physically and data interfacing with the to-be-tested bioaerosol sensor; an aerosol generation and transmission system 130 comprising an aerosol generator module and an aerosol transmission module, the aerosol generator module being used for generating standard particles and / or bioaerosol samples of known particle size, and the aerosol transmission module being used for delivering the standard particles and / or the bioaerosol samples into the environment control cabin and into a sampling port of the to-be-tested bioaerosol sensor; a data acquisition and control module 140 comprising a data acquisition unit, a control unit and a data storage and analysis unit, the data acquisition unit being used for synchronously acquiring environment sensor data arranged in the environment control cabin and raw data output by the to-be-tested bioaerosol sensor, the control unit being used for setting and controlling a temperature and humidity cycle curve of the environment control cabin, operating parameters of the aerosol generator module and a flow rate of the aerosol transmission module, and the data storage and analysis unit being used for storing and analyzing the acquired data.

[0023] Currently, while temperature and humidity control chambers exist for sensor calibration and testing, they typically lack integrated aerosol generation and delivery systems, as well as comprehensive and high-precision data acquisition and analysis capabilities for multiple parameters (particle size, scattering, multi-channel fluorescence) of bioaerosol sensors. This invention, through a highly integrated modular design (integration of the environmental control chamber, the interface of the bioaerosol sensor under test, the aerosol generation and delivery system, and the data acquisition and control module), achieves comprehensive, systematic, and high-precision testing and characterization of the performance response of bioaerosol sensors under different temperature and humidity conditions.

[0024] In this embodiment of the invention, the environmental control chamber can be a sealed or semi-sealed cavity, which can accurately simulate and maintain a wide range of temperature and humidity conditions, thereby covering various extreme environments that the bioaerosol sensor may face in practical applications, which is conducive to realizing multi-dimensional testing and characterization of the temperature response characteristics of the bioaerosol sensor.

[0025] In some embodiments, the environmental control chamber may be equipped with a temperature sensor for real-time and accurate monitoring of temperature changes within the chamber, and a humidity sensor for real-time monitoring of humidity changes within the chamber. The temperature and humidity sensors can feed the sensor data back to the data acquisition and control module for statistical analysis. The temperature sensor may be a PT100 resistance temperature detector (RTD) or a thermocouple, and the humidity sensor may be a capacitive humidity sensor.

[0026] In this embodiment of the invention, the interface of the bioaerosol sensor to be tested can be located inside the environmental control cabin, and is designed with a structure that can accommodate and physically and data interface with various different bioaerosol sensors, thereby providing a standardized and flexible installation and connection scheme that can adapt to bioaerosol sensors of different models and sizes.

[0027] In some embodiments, the interface of the bioaerosol sensor under test ensures that the bioaerosol sensor can be completely placed within the temperature and humidity environment set in the environmental control chamber, enabling the bioaerosol sensor to function normally within the environmental control chamber. The sampling port of the bioaerosol sensor under test can be connected to the aerosol transmission module, while allowing its power and data cables to be led out of the environmental control chamber for connection to the data acquisition and control module.

[0028] Specifically, the sampling port of the bioaerosol sensor under test can be tightly connected to the outlet of the aerosol transmission module, ensuring that the bioaerosol sample enters the bioaerosol sensor without leakage. Furthermore, the interface of the bioaerosol sensor under test can provide physical channels (such as wiring holes or sealed connectors) to allow the power and data cables of the bioaerosol sensor to be safely and sealed out of the environmental control chamber and connected to the data acquisition and control module, thus avoiding interference with the temperature and humidity control of the environmental control chamber.

[0029] In some embodiments, the bioaerosol sensor may be UV-APS, WIBS, other sensors based on LIF (Laser-Induced Fluorescence) or imaging technology, etc.

[0030] In this embodiment of the invention, the aerosol generation and transport system may include an aerosol generator module and an aerosol transport module, thereby providing a stable, controllable and well-defined aerosol sample for the bioaerosol sensor to be tested.

[0031] In this embodiment of the invention, the aerosol generator module can stably and controllably generate standard particles of known size as well as typical agricultural bioaerosol samples. The aerosol generator module exhibits high reproducibility and stability, ensuring consistent particle characteristics across different batches and testing conditions.

[0032] In this embodiment of the invention, the aerosol transport module can stably and efficiently transport the bioaerosol sample generated by the aerosol generator module to the environmental control chamber and into the sampling port of the bioaerosol sensor to be tested.

[0033] In some embodiments, the aerosol delivery module may include piping, valves, and a flow controller.

[0034] In this embodiment of the invention, the data acquisition and control module can be responsible for the automated management of the entire testing process, high-precision data acquisition, storage and preliminary analysis, including a data acquisition unit, a control unit and a data storage and analysis unit.

[0035] In some embodiments, the data acquisition unit can synchronously and frequently acquire environmental sensor data (temperature and humidity) and raw data output from the bioaerosol sensor under test within the environmental control chamber. The control module integrates software programs that can be used to set and control the temperature and humidity cycling curves of the environmental control chamber, the operating parameters of the aerosol generator module, and the flow rate of the aerosol transmission module, and to automate the entire testing process. The data storage and analysis module can store all acquired raw data and provide preliminary data processing and analysis functions, such as plotting curves of sensor parameters changing with temperature and humidity, calculating statistical indicators, and analyzing changes in the fluorescence matrix.

[0036] This invention provides a precise and stable temperature and humidity control environment through an environmental control chamber, capable of simulating a wide range of temperature and humidity conditions in real agricultural environments. This ensures the accuracy and repeatability of test results, laying the foundation for performance evaluation of bioaerosol sensors. By integrating a high-precision environmental control chamber, an aerosol generation and transmission system, an interface for the bioaerosol sensor under test, and a data acquisition and control module, it can comprehensively and systematically test various key performance indicators of bioaerosol sensors under different temperature and humidity conditions, revealing the comprehensive impact of temperature on the sensor's multi-parameter response. The automated data acquisition and control module enables automatic cyclic testing of preset test parameters and automatic data acquisition, significantly improving testing efficiency, reducing manual intervention and operational errors, greatly saving manpower and time costs, and also enabling systematic acquisition of data. The response characteristics data of bioaerosol sensors under different temperatures and humidity levels provide a reliable and detailed experimental data foundation for in-depth analysis of the temperature influence mechanism and the development of high-precision sensor adaptive compensation models, thereby improving the sensor's environmental adaptability and measurement accuracy. The platform for testing the temperature response characteristics of bioaerosol sensors adopts a modular and adjustable interface design, which can be compatible with various types of bioaerosol sensors and various aerosol samples, and has good versatility and scalability, with a wide range of applications. Through accurate characterization of the temperature response characteristics of bioaerosol sensors, sensor manufacturers can be guided to improve sensor design, optimize hardware performance and algorithms, thereby promoting the reliable application of bioaerosol monitoring technology in complex environments such as outdoor agriculture and agricultural environments, and providing more accurate data support for environmental monitoring and public health.

[0037] Based on any of the above embodiments, the environmental control chamber is used to simulate and maintain a temperature range of -20 to 50°C and a relative humidity range of less than 20% to greater than 90%.

[0038] In this embodiment of the invention, the environmental control chamber can precisely control the temperature within a range of, for example, -20°C to 50°C, and can accurately reproduce any preset temperature point or temperature cycle curve. Regarding humidity control, the environmental control chamber can maintain a precise range from low humidity (e.g., below 20% RH) to high humidity (e.g., above 90% RH), and different humidity gradients can be set according to testing requirements.

[0039] In some embodiments, heating components may be attached to the outer wall of the environmental control chamber to achieve uniform heating and avoid localized overheating. When approaching the target temperature, the heating power can be reduced in advance to prevent overheating within the environmental control chamber and ensure temperature control accuracy.

[0040] In some embodiments, a cooling system may be installed inside the environmental control chamber to uniformly cool the interior of the environmental control chamber.

[0041] In some embodiments, the control unit in the data acquisition and control module can receive the target temperature, obtain the real-time temperature inside the environmental control cabin through a temperature sensor installed inside the environmental control cabin, and compare the real-time temperature with the target temperature. If the real-time temperature is higher than the target temperature, the cooling components can be controlled to cool until the target temperature is reached; if the real-time temperature is lower than the target temperature, the heating components can be controlled to heat until the target temperature is reached; if the real-time temperature is equal to the target temperature, no temperature adjustment is required inside the environmental control cabin.

[0042] In this embodiment of the invention, a relative humidity of less than 20% indicates that the environment is in an extremely dry state, and a relative humidity of more than 90% indicates that the environment is in an extremely humid state.

[0043] In some embodiments, the humidity inside the environmental control chamber can be regulated by a combination of refrigeration condensation and chemical dehumidification.

[0044] In some embodiments, since refrigeration affects ambient humidity and heating affects ambient temperature, embodiments of the present invention can predict the impact of adjusting one variable on the other variable based on the relationship between temperature and humidity and the relationship between humidity and temperature, thereby better synchronizing the temperature and humidity in the environmental control chamber.

[0045] The embodiments of the present invention can accurately simulate and maintain a wide temperature range of -20 to 50°C and relative humidity conditions from less than 20% to greater than 90% through an environmental control chamber. This simulates a wide range of temperature and humidity conditions in real agricultural environments, which can cover the extreme environments that bioaerosol sensors may face in practical applications. Thus, it provides a high-fidelity testing platform for testing the key indicators of bioaerosol sensors under extreme environments.

[0046] Based on any of the above embodiments, the environmental control cabin is also equipped with an airflow uniform distribution system to ensure that the temperature and humidity fields at various points within the environmental control cabin are uniform.

[0047] In this embodiment of the invention, the environmental control chamber may be designed with a uniform airflow distribution system to ensure the high uniformity and stability of the temperature and humidity field inside the environmental control chamber.

[0048] In some embodiments, the airflow uniform distribution system may consist of a circulating fan, a deflector plate, and / or a perforated plate to ensure uniform temperature and humidity fields at all points within the environmental control chamber, avoiding localized hot or cold spots, thereby ensuring that the bioaerosol sensor under test is in a stable and representative testing environment. For example, the circulating fan can drive forced convection of air within the environmental control chamber; the deflector plate can uniformly disperse the airflow, reducing boundary layer effects.

[0049] Based on any of the above embodiments, the interface of the bioaerosol sensor to be tested is designed to be modular or adjustable to adapt to bioaerosol sensors of different models and sizes.

[0050] In this embodiment of the invention, the interface of the bioaerosol sensor to be tested can be designed to be modular or adjustable, so that it can be quickly adjusted and fixed according to the physical size of the bioaerosol sensor to be tested and the sampling port position.

[0051] In some embodiments, the interface of the bioaerosol sensor to be tested may include a physical adapter module and a functional connection module. The physical adapter module may include a movable support fixture and a sensor mounting base mounted on the support fixture. The sensor mounting base may have multiple pre-set standard interfaces for physical interfacing with various types of bioaerosol sensors. The functional connection module may be designed as a replaceable modular I / O panel with pre-drilled standardized openings or slots to accommodate different electrical and data connector modules for data interfacing with various bioaerosol sensors. It can also be connected to a data acquisition and control module via power and data cables.

[0052] The embodiments of the present invention combine a physical adaptation module and a functional connection module to realize a modular and adjustable interface for the bioaerosol sensor under test, thereby enabling compatibility with a variety of different types of bioaerosol sensors. This eliminates the need to design a corresponding test platform for each new bioaerosol sensor that may emerge in the future, thus reducing testing costs.

[0053] Based on any of the above embodiments, the standard particles with known particle sizes include polystyrene latex particles and fluorescent microspheres; the aerosol generator module is used to atomize the particle suspension into droplets, remove moisture to obtain solid particles, and classify the solid particles to obtain standard particles with known particle sizes; the bioaerosol sample includes typical agricultural fungal spores, pollen, or bacteria; the aerosol generator module is also used to atomize and dry the microbial suspension to obtain a bioaerosol sample.

[0054] In this embodiment of the invention, the aerosol generator module can generate monodisperse or polydisperse aerosols with narrow particle size distribution and stable concentration through precise atomization, drying, and grading processes.

[0055] In some embodiments, standard particles may include polystyrene latex (PSL) particles of known size and fluorescent microspheres. PSL particles can be used for calibration and verification of particle size measurements, and fluorescent microspheres can be used for calibration of fluorescence signal response. PSL particles can be atomized into droplets using a precision nebulizer (e.g., an ultrasonic nebulizer or a pneumatic nebulizer), and then moisture can be removed by a drying section to obtain solid particles with a narrow particle size distribution and stable concentration. Subsequently, precise classification can be performed using equipment such as a Differential Mobility Analyzer (DMA) or a turbine classifier to obtain monodisperse or particles with a specific particle size distribution.

[0056] In some embodiments, bioaerosol samples may include agriculturally typical fungal spores, pollen, or bacteria. These bioaerosols can be generated, for example, by spray drying, vortex aerosol generators, or solid particle generators, thereby simulating a real bioaerosol environment. For example, microbial suspensions can be atomized and the drying process controlled to obtain bioaerosol samples, thereby ensuring the activity or integrity of the microorganisms.

[0057] The embodiments of the present invention can control the parameters of the aerosol generator (such as airflow rate, atomized liquid concentration, drying temperature, etc.) to ensure consistent particle characteristics (particle size, concentration, fluorescence intensity, etc.) in different batches and under different test conditions.

[0058] Based on any of the above embodiments, the aerosol transport module is made of an inert material to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the tube wall; the aerosol transport module is provided with an antistatic unit to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the tube wall.

[0059] In this embodiment of the invention, the aerosol transport module can be used to stably and efficiently transport the bioaerosol sample (or standard particles) generated by the aerosol generator module to the high-precision environmental control chamber, and finally into the sampling port of the bioaerosol sensor to be tested.

[0060] In this embodiment of the invention, the transmission pipeline of the aerosol transmission module can be made of polytetrafluoroethylene (PTFE) or other inert materials, thereby minimizing particle loss and adsorption on the pipe wall and ensuring that the particle characteristics reaching the sampling port of the bioaerosol sensor are consistent with the generation source.

[0061] In some embodiments, a precision flow controller (e.g., a mass flow controller (MFC)) and a flow meter may be installed in the transmission pipeline to precisely control the delivery flow rate of the aerosol, ensure the stability of the sampling flow rate of the bioaerosol sensor under test, and adjust it according to the requirements of the bioaerosol sensor.

[0062] In this embodiment of the invention, the aerosol transport module may also be equipped with an antistatic device to reduce particle loss due to electrostatic adsorption on the pipe wall. The design of the transport pipeline and valves in the aerosol transport module can ensure that turbulence during the transport process is minimized to avoid particle breakage or agglomeration.

[0063] Based on any of the above embodiments, the data acquisition unit converts the analog signals output by the environmental sensors in the environmental control cabin into environmental sensor data, and converts the analog signals output by the bioaerosol sensor under test into raw data, through an analog-to-digital converter.

[0064] In this embodiment of the invention, the data acquisition unit can use an analog-to-digital converter (ADC) to convert the analog signals output by the environmental sensors in the environmental control cabin into environmental sensor data, and to convert the analog signals output by the bioaerosol sensor under test into raw data, thereby ensuring the accuracy of the raw data and minimizing noise interference.

[0065] In some embodiments, the data acquisition unit may include a high-precision analog-to-digital converter (ADC), which can be electrically connected to multiple environmental sensors (such as temperature sensors, humidity sensors, etc.) and the bioaerosol sensor under test within the environmental control cabin via a multi-channel input interface. The ADC module can have at least 16-bit resolution and a sampling rate of not less than 1 kS / s to ensure high-fidelity sampling of analog signals and meet the detection requirements of bioaerosol signals.

[0066] Based on any of the above embodiments, the control unit is used for automatic cyclic testing of preset test parameters and automatic data acquisition.

[0067] In this embodiment of the invention, the control unit can integrate dedicated software programs to achieve automated control and management of the entire testing process. The control unit can perform automatic cyclic testing and automatic data acquisition using preset test parameters, significantly improving testing efficiency and reducing manual intervention and operational errors. For example, the bioaerosol sensor can be set to operate stably at each temperature and humidity point for a period of time, automatically collecting data, and then automatically switching to the next temperature and humidity point.

[0068] In some embodiments, users can set temperature and humidity cycling curves for the high-precision environmental control chamber via a software interface (e.g., gradually increasing from a low temperature to a high temperature, or maintaining a specific temperature and humidity point for a period of time), and the control unit can precisely execute these settings. Simultaneously, the control unit can also control the operating parameters of the aerosol generator module (e.g., generation time, concentration, and grading status) and the flow rate of the aerosol delivery module, thereby ensuring that the characteristics of the aerosol samples entering the bioaerosol sensor remain consistent under different temperature and humidity conditions.

[0069] Based on any of the above embodiments, the raw data output by the bioaerosol sensor under test includes at least one of the following parameters: particle size measurement, scattered light signal intensity, and signal intensity of at least two fluorescence channels; the data storage and analysis unit is used to plot the curves of the various parameters with temperature and humidity to demonstrate the temperature response characteristics of the bioaerosol sensor under test, and to calculate statistical indicators; the statistical indicators include at least one of the following: mean, standard deviation, and coefficient of variation of the raw data output by the bioaerosol sensor under test at each temperature and humidity point.

[0070] In this embodiment of the invention, the data acquisition module has multi-channel, synchronous, and high-frequency data acquisition capabilities, enabling it to simultaneously acquire environmental sensor data (temperature, humidity) from within the high-precision environmental control chamber, as well as raw data output from the bioaerosol sensor under test. The raw data output from the bioaerosol sensor under test may include parameters such as particle size measurement, scattered light signal intensity, and signal intensity of at least two fluorescence channels.

[0071] Particle size measurements can be aerodynamic diameter (measured by UV-APS) or optical diameter, reflecting particle size information. Scattered light signal intensity can be used to reflect optical properties such as particle shape and refractive index. Signal intensity of at least two or more fluorescence channels: Bioaerosol sensors can employ laser-induced fluorescence (LIF) technology to distinguish between biological and non-biological particles and classify biological particles by the signal intensity (fluorescent fingerprint) of multiple fluorescence emission bands.

[0072] Based on any of the above embodiments, the data storage and analysis unit is further configured to analyze the signal intensity data of the at least two fluorescence channels and evaluate the effects of temperature and humidity on the fluorescent fingerprint; the data storage and analysis unit is further configured to display the test progress and test data in real time through a graphical user interface and generate a test report according to a preset report template.

[0073] In this embodiment of the invention, the data acquisition and control module can realize the functions of data visualization, historical data query and test report generation.

[0074] In this embodiment of the invention, the data storage and analysis unit in the data acquisition and control module is responsible for the reliable storage of all acquired raw data. The data can be stored on a local hard drive or in the cloud, and has comprehensive data management functions, such as data retrieval and backup.

[0075] In some embodiments, the data storage and analysis unit can also provide preliminary data processing and analysis functions, including curve plotting, statistical index calculation, fluorescence matrix analysis, visualization, historical data query, and test report generation.

[0076] Specifically, the data storage and analysis unit can automatically plot the curves of various sensor parameters (including particle size measurement, scattered light signal intensity, signal intensity of each fluorescence channel, etc.) as a function of temperature and humidity, intuitively displaying the temperature response characteristics of the sensor, thereby realizing the curve plotting function.

[0077] Specifically, the data storage and analysis unit can calculate statistical indicators such as the average value, standard deviation, and coefficient of variation of sensor data at each temperature and humidity point, and evaluate the stability and repeatability of the data, thereby realizing the function of calculating statistical indicators.

[0078] Specifically, the data storage and analysis unit can analyze multi-channel fluorescence data and assess the effects of temperature and humidity on fluorescence fingerprints. This is crucial for developing a temperature compensation model for biological particle classification algorithms, thereby enabling fluorescence matrix analysis.

[0079] Specifically, the data storage and analysis unit provides a user-friendly interface that displays test progress and data in real time, facilitates historical data review, and can automatically generate detailed test reports based on templates, thereby enabling visual display, historical data query, and test report generation.

[0080] Figure 2 This is the second schematic diagram of the platform for testing the temperature response characteristics of a bioaerosol sensor provided in this embodiment of the invention. (Refer to...) Figure 2In one specific embodiment, the platform for testing the temperature response characteristics of a bioaerosol sensor may include: a first generator 10 for generating standard particles, a second generator 12 for generating bioaerosol samples, a transmission pipe 14 for transmitting the standard particles generated by the first generator, a transmission pipe 16 for transmitting the bioaerosol samples generated by the second generator, a high-precision environmental control chamber 20, a bioaerosol sensor to be tested (including UV-APS 22 and WIBS 24) located inside the environmental control chamber, a PMT 26, an airflow system 28, a data acquisition unit 30, a control unit 32, a data cable 34, and a data storage and analysis unit 40.

[0081] The platform for testing the temperature response characteristics of a bioaerosol sensor provided in this embodiment of the invention can perform temperature response characteristic testing on the bioaerosol sensor through the following steps: Step 1, Sensor Installation and Connection: Install the bioaerosol sensor to be tested on the sensor interface inside the environmental control cabin, and connect its power cord and data cable to the data acquisition and control module.

[0082] Step 2: Aerosol generator preparation: Prepare standard particle or bioaerosol samples according to the test requirements and connect them to the aerosol generator module.

[0083] Step 3, Test Parameter Setting: Through the control unit of the data acquisition and control module, set the temperature and humidity cycle curves of the high-precision environmental control chamber (e.g., change a point every 5°C and hold at each point for 1 hour), as well as the operating parameters of the aerosol generator and transmission system (e.g., continuously generate PSL particles of a certain size at a flow rate of 1L / min).

[0084] Step 4: Automated Test Execution: Start the test platform. The control unit will automatically control the temperature and humidity changes in the environmental control chamber. At each set temperature and humidity point, the aerosol generator module can stably generate aerosol samples and deliver them to the sensor under test via the aerosol transport module.

[0085] Step 5, Data Synchronous Acquisition: The data acquisition unit can simultaneously acquire temperature and humidity data in the environmental control chamber, as well as raw data on particle size, scattered light, and multiple fluorescence channels output by the bioaerosol sensor under test.

[0086] Step 6: Data storage and analysis: All collected data is stored in real time and preliminarily processed through the data storage and analysis unit, including plotting response curves and calculating statistical indicators.

[0087] Step 7: Results Output: After the test is completed, a detailed test report is generated, which includes the performance response data and analysis results of the bioaerosol sensor under different temperature and humidity conditions.

[0088] To address the issues that existing bioaerosol sensors are susceptible to performance fluctuations under complex environmental conditions, and that current testing methods cannot systematically and accurately evaluate the multi-parameter responses (such as particle size, scattered light, and multispectral fluorescence) of bioaerosol sensors under a wide range of temperature and humidity conditions, this invention provides a platform for testing the temperature response characteristics of bioaerosol sensors. Through high-precision environmental control, stable aerosol generation and transmission, and multi-parameter synchronous acquisition and analysis functions, it can provide reliable basic data for sensor performance evaluation and data compensation model development.

[0089] Compared with the prior art, the present invention has the following significant technical effects: (1) High precision and stability: It provides a precise and stable temperature and humidity control environment, which can simulate a wide range of temperature and humidity conditions in real agricultural environments, ensuring the accuracy and repeatability of test results, and laying a solid foundation for the performance evaluation of bioaerosol sensors.

[0090] (2) Comprehensiveness and systematicness: It integrates aerosol generation, transmission, environmental control, multi-sensor interface and data acquisition and control functions, and can systematically test the key performance indicators of bioaerosol sensors under different temperature and humidity conditions, such as particle size, scattered light and multispectral fluorescence, and reveal the comprehensive influence of temperature on the multi-parameter response of bioaerosol sensors.

[0091] (3) High efficiency and automation: Through the automatic control module, the automatic cyclic testing of preset test parameters and automatic data collection can be realized, which significantly improves test efficiency, reduces manual intervention and operation errors, and greatly saves manpower and time costs.

[0092] (4) Data foundation support: It can systematically acquire response characteristic data of bioaerosol sensors under different temperatures and humidity, providing a reliable and detailed experimental data foundation for in-depth analysis of temperature influence mechanisms and development of high-precision sensor adaptive compensation models, thereby improving the environmental adaptability and measurement accuracy of bioaerosol sensors.

[0093] (5) Universality: The test platform provided by this invention adopts a modular and adjustable interface design, which can be compatible with various types of bioaerosol sensors (such as UV-APS, WIBS, etc.) and various aerosol samples (standard particles, biological particles). It has good versatility and expandability and can be applied to multiple fields such as scientific research institutions, sensor manufacturers and agricultural technology research and development departments.

[0094] (6) Promote technological progress: By accurately characterizing the temperature response characteristics of bioaerosol sensors, sensor manufacturers can be guided to improve the design of bioaerosol sensors, optimize hardware performance and algorithms, and promote the reliable application of bioaerosol monitoring technology in complex environments (such as outdoor agriculture and industrial environments), providing more accurate data support for environmental monitoring and public health.

[0095] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0096] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A platform for testing the temperature response characteristics of bioaerosol sensors, characterized in that, include: An environmental control chamber is used to simulate and maintain preset temperature and humidity conditions. The interface for the bioaerosol sensor to be tested is located inside the environmental control chamber. It is used to house the bioaerosol sensor to be tested and to provide a physical and data interface with the bioaerosol sensor to be tested. An aerosol generation and transport system includes an aerosol generator module and an aerosol transport module. The aerosol generator module is used to generate standard particles and / or bioaerosol samples of known particle size. The aerosol transport module is used to transport the standard particles and / or the bioaerosol samples to an environmental control chamber and into the sampling port of the bioaerosol sensor to be tested. The data acquisition and control module includes a data acquisition unit, a control unit, and a data storage and analysis unit. The data acquisition unit is used to synchronously acquire environmental sensor data and raw data output by the bioaerosol sensor located in the environmental control chamber. The control unit is used to set and control the temperature and humidity cycle curves of the environmental control chamber, the operating parameters of the aerosol generator module, and the flow rate of the aerosol transmission module. The data storage and analysis unit is used to store and analyze the acquired data.

2. The platform for testing the temperature response characteristics of bioaerosol sensors according to claim 1, characterized in that, The environmental control chamber is used to simulate and maintain a temperature range of -20 to 50°C and a relative humidity range of less than 20% to greater than 90%.

3. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The environmental control cabin is also equipped with an airflow uniform distribution system to ensure that the temperature and humidity fields at all points inside the environmental control cabin are uniform.

4. The platform for testing the temperature response characteristics of bioaerosol sensors according to claim 1, characterized in that, The interface of the bioaerosol sensor to be tested is designed to be modular or adjustable to accommodate bioaerosol sensors of different models and sizes.

5. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The standard particles with known particle size include polystyrene latex particles and fluorescent microspheres; the aerosol generator module is used to atomize the particle suspension into droplets, remove water to obtain solid particles, and classify the solid particles to obtain standard particles with known particle size. The bioaerosol sample includes typical agricultural fungal spores, pollen, or bacteria; the aerosol generator module is also used to atomize and dry the microbial suspension to obtain the bioaerosol sample.

6. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The aerosol transport module is made of inert material to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the tube wall; The aerosol transport module is equipped with an antistatic unit to reduce the loss and adsorption of the standard particles and / or the bioaerosol sample on the tube wall.

7. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The data acquisition unit uses an analog-to-digital converter to convert the analog signals output by the environmental sensors in the environmental control cabin into environmental sensor data, and to convert the analog signals output by the bioaerosol sensor under test into raw data.

8. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The control unit is used for automatic cyclic testing with preset test parameters and automatic data acquisition.

9. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 1, characterized in that, The raw data output by the bioaerosol sensor to be tested includes at least one of the following parameters: particle size measurement, scattered light signal intensity, and signal intensity of at least two fluorescence channels. The data storage and analysis unit is used to plot the curves of various parameters with temperature and humidity to demonstrate the temperature response characteristics of the bioaerosol sensor under test, and to calculate statistical indicators; the statistical indicators include at least one of the mean, standard deviation, and coefficient of variation of the raw data output by the bioaerosol sensor under test at each temperature and humidity point.

10. The platform for testing the temperature response characteristics of a bioaerosol sensor according to claim 9, characterized in that, The data storage and analysis unit is also used to analyze the signal intensity data of the at least two fluorescence channels and evaluate the effects of temperature and humidity on the fluorescent fingerprint. The data storage and analysis unit is also used to display test progress and test data in real time through a graphical user interface, and to generate test reports according to preset report templates.

Images