Dynamic calibration device and method for multi-sensor air negative ion observation instrument

Abstract

The invention relates to a dynamic calibration device and method for a multi-sensor air negative ion observation instrument, and the method comprises the steps: calibrating a real-time micro-current measurement signal of a single-sensor or multi-sensor air negative ion observation instrument when a calibration signal is obtained, and obtaining a calibrated micro-current measurement signal of the air negative ion observation instrument; according to the sampling volume of the air and the electric quantity of the basic charge, the calibrated micro-current measurement signal of the air negative ion observation instrument is converted into the negative ion concentration, and the calibrated air negative ion observation instrument serves as a first transmission standard; at least two shunting ports in the negative ion generation and shunting calibration device are used for shunting and outputting the equalized negative ions; and outputting the negative ion concentration of the shunting port to the air negative ion observation instrument with the first transmission standard and the air negative ion observation instrument to be calibrated respectively, and obtaining measurement data of the air negative ion observation instrument with the first transmission standard and measurement data of the air negative ion observation instrument to be calibrated respectively.

Description

Technical Field

[0001] The present application relates to the field of meteorological measurement, and in particular to a dynamic calibration device and method for a multi-sensor air negative ion observation instrument. Background Art

[0002] Negative air ions are a general term for negatively charged individual gas molecules and light ion clusters in the atmosphere. They can absorb pollutants such as smoke, dust, pathogens, and vehicle exhaust, effectively removing pollutants from the air and reducing the health risks posed by smog and other factors. Research has shown that small-particle negative air ions can penetrate the human blood-brain barrier, providing therapeutic and health benefits. They can improve and enhance lung function and have beneficial effects on the nervous, respiratory, and immune systems, with the respiratory system being the most significant. They help maintain optimal motor function and contribute to human health. Therefore, negative air ions are often called the "vitamins" of the atmosphere and are closely related to disciplines such as environmental meteorology, ecometeorology, and tourism meteorology. Negative ion concentrations vary significantly across geography, weather conditions, and seasons, and can vary significantly across environments. Monitoring negative air ion concentrations plays a crucial role in assessing air quality, ecology, the environment, and health impacts, and has become a key ecological and public concern for governments at all levels and the general public.

[0003] In the market, many manufacturers measure the negative ion content (number concentration) in the air based on the principle of capacitive inhalation method. The main working principle of the capacitive inhalation method is: load a quantitative polarization voltage on the polarization plate (or bias plate) of the ion sensor (or collection bucket, collection tube), and then let the measured air pass through the sensor at a set speed. Specific small-particle negative ions in the air are deflected by the electric field and captured by the collection plate. Based on the number of negative ion charges collected, the concentration value of the negative ions can be calculated. However, the capacitive inhalation method measures the weak microcurrent measurement signal generated by air negative ions. Due to the different ways and methods of signal acquisition, signal amplification and signal processing, the negative ion concentrations given by instruments from different manufacturers are not the same, and there are large differences between the measurement results, sometimes even up to 1-2 orders of magnitude.

[0004] Due to the lack of unified standards, there is currently no industry-recognized calibration instrument, so it is impossible to determine whether the negative ion content measured by a certain instrument is accurate. This has led to a situation where each instrument manufacturer operates independently and the measurement results vary greatly. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to propose a dynamic calibration device and method for a multi-sensor air negative ion observation instrument to solve the technical problem of inaccurate measurement of negative ion concentration.

[0006] In order to solve the above technical problems, the present invention provides a method for dynamic calibration of a multi-sensor air negative ion observation instrument, which comprises the following steps:

[0007] When obtaining the calibration signal, the microcurrent measurement signal of the real-time single-sensor or multi-sensor air negative ion observation instrument is calibrated to obtain a calibrated microcurrent measurement signal of the air negative ion observation instrument, and then the calibrated microcurrent measurement signal of the air negative ion observation instrument is converted into a negative ion concentration according to the sampling volume of the air and the amount of the basic charge. The calibrated air negative ion observation instrument is used as the first transfer standard;

[0008] At least two diversion ports are provided in the negative ion generation and diversion calibration device to divert and output the uniform negative ions;

[0009] The negative ion concentration at the diversion port is output to the first transfer standard air negative ion observation instrument and the air negative ion observation instrument to be calibrated, respectively, and the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated are obtained respectively. The measurement data are fitted based on the least squares method to obtain the calibration equation.

[0010] Preferably, the step of providing at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions comprises:

[0011] The negative ion concentration is sucked in from the air inlet of the housing by the fan, and the negative ion concentration introduced is directed toward the air outlet of the housing through the air outlet direction of the fan;

[0012] The negative ion generator receives the negative ion concentration introduced by the fan, and the negative ion generator evenly distributes the negative ions and performs the first fluid filtration;

[0013] The negative ions after the first fluid filtration are introduced into the fluid filter, and the fluid filter receives the negative ions output by the negative ion generator and performs a second fluid filtration;

[0014] The negative ions processed by the fluid filter are guided to the air outlet of the housing through the output module for output.

[0015] Preferably, the steps of receiving the negative ion concentration introduced by the fan by the negative ion generator, uniformizing the negative ions by the negative ion generator and performing the first fluid filtration include:

[0016] The negative ion concentration introduced by the fan is received, and the introduced negative ion concentration is filtered for the first time through multiple irregular pipes set in the honeycomb pipe. When the negative ion concentration is drained in the honeycomb pipe, negative ions are generated based on the negative ion powder on the inner wall of the honeycomb pipe and the airflow is straightened.

[0017] Preferably, the step of directing the negative ions processed by the fluid filter to the air outlet of the housing through the output module includes:

[0018] The negative ions processed by the fluid filter are received through the guide tube, and the negative ions flowing through are adjusted to the laminar flow standard. The adjusted negative ions are guided to the air outlet of the shell for output.

[0019] Preferably, after the step of receiving the negative ions processed by the fluid filter through the flow guide tube, adjusting the negative ions flowing through to a laminar flow standard, and directing the adjusted negative ions to the air outlet of the housing for output, the method further comprises the following steps:

[0020] The horizontal angle of the guide tube is detected by a level meter and a horizontal angle signal is generated;

[0021] When the adjusting bracket receives the horizontal angle signal of the level meter, the adjusting bracket compares the horizontal angle of the guide tube in the horizontal angle signal with the initial horizontal angle and adjusts the guide tube horizontally according to the comparison result.

[0022] Preferably, after the step of receiving the negative ion concentration introduced by the fan by the negative ion generator, the method further comprises:

[0023] During calibration, the negative ion generator is adjusted to several gears, that is, negative ions of different concentration levels are generated. Based on the least squares method, the results of the synchronous measurements of the air negative ion observation instrument to be calibrated and the standard instrument at each gear are fitted by the least squares method to obtain the standard equation of the negative ion concentration of the corresponding gear.

[0024] In order to solve the above technical problems, the embodiment of the present application also provides a dynamic calibration device for a multi-sensor air negative ion observation instrument, the device comprising:

[0025] The microcurrent calibration device for negative air ions is used to calibrate the microcurrent measurement signal of a real-time single-sensor or multi-sensor negative air ion observation instrument to obtain a calibrated microcurrent measurement signal of the negative air ion observation instrument when obtaining a calibration signal. The calibrated microcurrent measurement signal of the negative air ion observation instrument is then converted into a negative ion concentration based on the sampling volume of the air and the amount of basic charge. The calibrated negative air ion observation instrument serves as the first transfer standard.

[0026] A negative ion generation and diversion comparison test device is used to set at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions;

[0027] The second calibration device is used to output the negative ion concentration of the diversion port to the first transfer standard air negative ion observation instrument and the air negative ion observation instrument to be calibrated, respectively, to obtain the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated, and to fit the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation.

[0028] The present application obtains a calibration signal by calibrating the microcurrent measurement signal of a real-time single-sensor or multi-sensor air negative ion observation instrument to obtain the microcurrent measurement signal of the calibrated air negative ion observation instrument, and then converts the microcurrent measurement signal of the calibrated air negative ion observation instrument into a negative ion concentration based on the sampling volume of the air and the electrical quantity of the basic charge, and the calibrated air negative ion observation instrument is the first transfer standard; at least two diversion ports in the negative ion generation and diversion calibration device are set to divert and output the uniformed negative ions; the negative ion concentrations of the diversion ports are output to the air negative ion observation instrument of the first transfer standard and the air negative ion observation instrument to be calibrated, respectively, and the measurement data of the air negative ion observation instrument of the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated are respectively obtained, and the measurement data are fitted to the measurement data of the air negative ion observation instrument of the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation. The negative ion observation has a standard transfer instrument and provides a unified and traceable calibration method, which improves the accuracy and reliability of the observation data, improves work efficiency, ensures the accuracy and reliability of the observation results, and makes the generated negative ions highly stable and the concentration accurate. The concentration of negative ions can be adjusted according to needs, increasing the reliability of the negative ion generation and diversion comparison test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the solutions in this application, a brief introduction will be given below to the drawings required for use in the description of the embodiments of this application. Obviously, the drawings described below are some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 It is a flow chart of an embodiment of a dynamic calibration method of a multi-sensor air negative ion observation instrument;

[0031] Figure 2This is a schematic diagram of least squares fitting; Figure 3 It is a module diagram of an embodiment of a dynamic calibration device for a multi-sensor air negative ion observation instrument. DETAILED DESCRIPTION

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0035] like Figure 1 FIG. 1 is a flow chart showing an embodiment of a dynamic calibration method for a multi-sensor air negative ion observation instrument according to the present application. The dynamic calibration method for a multi-sensor air negative ion observation instrument includes:

[0036] Step S110, when obtaining the calibration signal, calibrating the microcurrent measurement signal of the real-time single-sensor or multi-sensor negative air ion observation instrument to obtain the calibrated microcurrent measurement signal of the negative air ion observation instrument, and then converting the calibrated microcurrent measurement signal of the negative air ion observation instrument into a negative ion concentration based on the sampling volume of the air and the amount of the basic charge. The calibrated negative air ion observation instrument is used as the first transfer standard;

[0037] Step S120, setting at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions;

[0038] Step S130, the negative ion concentration of the diversion port is output to the first transfer standard negative air ion observation instrument and the negative air ion observation instrument to be calibrated, respectively, and the measurement data of the first transfer standard negative air ion observation instrument and the measurement data of the negative air ion observation instrument to be calibrated are obtained respectively, and the measurement data are fitted based on the least squares method to obtain the calibration equation of the measurement data of the first transfer standard negative air ion observation instrument and the measurement data of the negative air ion observation instrument to be calibrated.

[0039] The microcurrent calibration module of negative air ions uses the least squares method to fit the standard microcurrent measurement signals of different intensity levels and the microcurrent measurement signals of the negative air ion observation instrument and obtain the calibration equation. Based on the calibration equation, the microcurrent measurement signal of the real-time single-sensor or multi-sensor negative air ion observation instrument is calibrated to obtain the calibrated microcurrent measurement signal of the negative air ion observation instrument; the calibrated microcurrent measurement signal is then converted into negative ion concentration using the technical parameters of the negative air ion observation instrument to be calibrated, such as wind speed, plate length, bias voltage, and plate spacing, thereby achieving accurate metrological calibration of the negative air ion observation instrument to be calibrated. The negative ion generator uses a negative ion generation source with an adjustable concentration to generate negative ions of controllable concentration and transports the negative ions to the diversion port for output. Finally, the readings of the standard instrument and the negative air ion observation instrument to be calibrated are recorded. After least squares fitting processing, the functional relationship (calibration equation) between the measurement results of the negative air ion observation instrument to be calibrated and the standard instrument is directly obtained, thereby achieving accurate metrology of the negative air ion observation instrument to be calibrated.

[0040] It should be noted that when obtaining the calibration signal, the microcurrent measurement signal of the real-time single-sensor or multi-sensor air negative ion observation instrument is calibrated to obtain the calibrated microcurrent measurement signal of the air negative ion observation instrument, and then the microcurrent measurement signal of the calibrated air negative ion observation instrument is converted into the negative ion concentration according to the sampling volume of the air and the amount of the basic charge. The steps include: when obtaining the microcurrent measurement signal of the real-time air negative ion observation instrument, the microcurrent measurement signal of the real-time air negative ion observation instrument is calibrated according to the calibration equation to obtain the calibrated microcurrent measurement signal of the air negative ion observation instrument, and then the microcurrent measurement signal of the calibrated air negative ion observation instrument is converted into the negative ion concentration according to the sampling volume of the air and the amount of the basic charge, thereby realizing accurate metrological calibration of the air negative ion observation instrument.

[0041] Among them, the microcurrent generating device generates standard microcurrents of different intensity levels that can be measured and traced. At the same time, it can also generate microcurrents of different intensity levels according to the received adjustment signal, and has functions such as remote control switching, time setting, zero adjustment, measurement and calibration mode switching. Among them, the transmission method of the adjustment signal can be wired or wireless. When it is a wireless transmission method, the device also includes an external remote control module, which communicates with the standard microcurrent generating device through the wireless signal module of the external remote control module, so that the external remote control module remotely inputs operation signals to the standard microcurrent generating device. The standard microcurrent generating device receives the wireless control signal, adjusts the microcurrent levels of different intensities in the process of generating the standard microcurrent signal according to the wireless control signal, and has remote control switching, time setting, zero adjustment, measurement and calibration mode switching.

[0042] The air negative ion observation instrument includes one or more positive ion and / or negative ion sensors, and the multiple ion sensors synchronously receive a standard microcurrent signal and measure the standard microcurrent signal to obtain a standard microcurrent measurement signal. The standard microcurrent measurement signal is obtained based on the measurement of each positive ion sensor and each negative ion sensor. In this embodiment, when calibrating the multi-sensor air negative ion observation instrument based on the microcurrent method, it is necessary to calibrate each ion sensor separately, wherein the multiple ion sensors detect the positive and negative ion concentrations in the air respectively, the multiple positive ion sensors synchronously detect the positive ion concentration in the air, and the multiple negative ion sensors synchronously detect the negative ion number concentration in the air, and the standard microcurrent measurement signal is obtained based on the measurement of the multiple positive ion concentrations and the multiple negative ion concentrations. The multiple positive ion sensors include positive ion sensors with any number of intensity levels including natural numbers such as three, four, five, six, seven, eight, nine, and ten, and the multiple negative ion sensors include negative ion sensors with any number of intensity levels including natural numbers such as three, four, five, six, seven, eight, nine, and ten. The specific number of positive ion sensors and negative ion sensors can be set according to demand. When calibrating each of the multiple sensors of an air ion observation instrument, the standard microcurrent signals of all ion sensors and the multiple standard microcurrent measurement signals corresponding to each ion sensor are fitted based on the least squares method to obtain the corresponding calibration equation. When calibrating an air ion observation instrument having three positive ion sensors and three negative ion sensors, the six ion sensors (including three positive ion sensors and three negative ion sensors) are calibrated separately to obtain calibration equations corresponding to the six ion sensors. According to the calibration equation corresponding to each ion sensor, the measurement signal of each ion sensor is calibrated, and then the measurement signal of each ion sensor after calibration is converted into a positive ion concentration or a negative ion concentration. Finally, the multiple positive ion concentrations or negative ion concentrations are averaged after removing the values ​​with obvious deviations to obtain the average value of the positive ion concentration or the average value of the negative ion concentration.

[0043] After measuring the number and size of positive and negative ions, the least squares method is used to fit the standard microcurrent signals of different intensity levels and the standard microcurrent measurement signals to obtain a calibration equation; when the microcurrent measurement signal of the real-time air negative ion observation instrument is obtained, the microcurrent measurement signal of the real-time air negative ion observation instrument is calibrated according to the calibration equation to obtain the calibrated microcurrent measurement signal of the air negative ion observation instrument, and then the calibrated microcurrent measurement signal of the air negative ion observation instrument is converted into a negative ion concentration according to the sampling volume of the air and the amount of the basic charge, thereby achieving accurate metrological calibration of the air negative ion observation instrument. Among them, the measurement data of the standard microcurrent signal and the standard microcurrent measurement signal are recorded, the quality control of the standard microcurrent signal and the standard microcurrent measurement signal is performed and the measurement data with the best linear fit is determined; based on the least squares method, the optimal measurement data partial derivative equations of the standard microcurrent signal and the standard microcurrent measurement signal are obtained respectively; based on the linear relationship between the optimal measurement data of the standard microcurrent signal and the standard microcurrent measurement signal, the optimal measurement data partial derivative equations of the standard microcurrent signal and the standard microcurrent measurement signal are fitted to obtain the calibration equation. The specific calculation method is as follows:

[0044] When studying the relationship between two variables (x, y), we can usually get a series of paired data (x1, y1), (x2, y2)..(x m ,y m ); Plot these data in xy. If it is found that these points are near a straight line, the equation of this line can be made as (Formula 1-1).

[0045] Y 计 =a0+a1X (Formula 1-1)

[0046] Where: a0, a1 are arbitrary real numbers

[0047] To determine a0 and a1, the least square method is applied to the measured value Y i The value (Y 计 =a0+a1X) difference (Y i -Y 计 ) of the squares〔∑(Y i -Y 计 ) 2 〕Minimum is the "optimization criterion".

[0048] Let:φ=∑(Y i -Y 计 ) 2 (Formula 1-2)

[0049] Substituting (Formula 1-1) into (Formula 1-2) we get:

[0050] φ=∑(Y i -a0-a1-X i ) 2 (Formula 1-3)

[0051] When ∑(Y i -Y 计 ) 2 When it is minimum, we can use the function φ to find the partial derivatives of a0 and a1, and make these two partial derivatives equal to zero. That is:

[0052] ma0+(∑X i )a1=∑Y i (Formula 1-4)

[0053] (∑X i )a0+(∑X i 2 )a1=∑(X i ,Y i ) (Formula 1-5)

[0054] The two equations with a0 and a1 as unknowns are obtained. Solving these two equations yields:

[0055]

[0056] Substituting a0 and a1 into (Formula 1-1) we can obtain the fitted linear equation.

[0057] During the fitting process, it is impossible for the fitting equation to pass through all the regression data points (x1, y1, x2, y2...x m ,y m ). Therefore, in order to judge the quality of the fitting equation, the correlation coefficient "R", the statistic "F", and the residual standard deviation "S" can be used for judgment; the closer "R" is to 1, the better; the larger the absolute value of "F", the better; the closer "S" is to 0, the better.

[0058]

[0059] In (Formula 1-1), m is the sample size, that is, the number of experiments; X i 、Y i The values ​​of X and Y for any set of experiments respectively.

[0060] Among them, this embodiment uses the microcurrent method traceable to the International System of Units (SI) to calibrate the multi-sensor air negative ion observation instrument. It should be noted that all sensors need to be calibrated independently to obtain the calibration method of each sensor; it should be noted that this embodiment can also calibrate a single sensor air negative ion observation instrument.

[0061] Preferably, the standard microcurrent generating device is integrally formed with the negative air ion monitoring instrument, and has the advantages of small size, light weight, portability, and ease of operation, and is not restricted by the detection environment or geographical location.

[0062] After fitting and obtaining the calibration equation, the readings of the standard transfer instrument and the air negative ion observation instrument to be calibrated are recorded respectively. After least squares fitting processing, the functional relationship between the measurement results of the air negative ion observation instrument to be calibrated and the standard transfer instrument is obtained.

[0063] A standard transfer instrument, located at the end of the negative air ion observation instrument, serves as a medium for calibration and value transfer as a measurement standard. The standard transfer instrument, in conjunction with the negative air ion generation and diversion comparison test device, can achieve metrological calibration of similar negative air ion meters. By receiving the standard calibration signal input by the standard transfer instrument, the measured negative ion concentration is fitted and calibrated with the standard calibration signal.

[0064] Negative air ion observation instrument to be calibrated, the negative air ion observation instrument to be calibrated is connected with the input end of the negative air ion observation instrument to be calibrated, so that the ion mobility of the negative air ion observation instrument to be calibrated output is in the negative air ion observation instrument, obtain the mobility in the negative air ion observation instrument to be calibrated, and the mobility in the negative air ion observation instrument to be calibrated is adjusted to the mobility of the negative air ion observation instrument. The access of the negative air ion observation instrument to be calibrated realizes the polarization voltage regulation function of the negative air ion observation instrument, and the mobility of the negative air ion observation instrument is adjusted to the numerical value consistent with the mobility of the negative air ion observation instrument to be calibrated (different observation instruments may have different ion mobilities, which means that measurement results may be different), thereby realizing the calibration of the negative air ion observation instrument to be calibrated.

[0065] The measurement results of the standard transfer instrument and the air negative ion observation instrument to be calibrated are shown in Table 1 below.

[0066] Table 1 Measurement results of the standard transfer instrument and the air negative ion observation instrument to be calibrated

[0067]

[0068] like Figure 2 As shown, the Y-axis represents the response of the standard transfer instrument, and the X-axis represents the response of the air negative ion observation instrument to be calibrated. Least squares fitting of the measured data yields a calibration equation of the form: y = ax + b. Substituting the response of the air negative ion observation instrument to be calibrated as x into the above equation yields the calibration result y for the air negative ion observation instrument to be calibrated.

[0069] By using this multi-point linear fitting (least square method) method to obtain the calibration equation, each air negative ion observation instrument to be calibrated can be calibrated conveniently and quickly.

[0070] The probe, the microcurrent measurement signal generated by the microcurrent generating device, is input into the collection board of the air negative ion observation instrument through a movable telescopic probe to achieve their measurement calibration. The probe is built with elastic material to enable the probe to move telescopically or universally.

[0071] Preferably, in this embodiment, a removable telescopic probe is also provided. The standard microcurrent signal generated by the standard microcurrent generator passes through the removable telescopic probe and is input into the acquisition board of the negative air ion observation instrument to achieve metrological calibration. The telescopic probe is built with elastic material to enable the probe to be telescopically movable or universally movable. Of course, in another embodiment, the telescopic probe can be fixed between the standard microcurrent generator and the negative air ion observation instrument.

[0072] Preferably, the device further comprises an external remote control module, which communicates with the standard microcurrent generator via a wireless signal module, allowing the external remote control module to remotely input operating signals to the standard microcurrent generator. For ease of operation, the wireless signal module of the external remote control module communicates with the standard microcurrent generator to enable functions such as remote switching of standard microcurrent signals of different intensity levels, time setting, zero calibration, and switching between measurement and calibration modes.

[0073] It should be noted that the step of setting at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions includes:

[0074] The fluid is sucked in from the air inlet of the housing by the fan, and the introduced fluid is guided toward the air outlet of the housing through the air outlet direction of the fan; the fluid introduced by the fan is received by the negative ion generator, and the negative ion generator generates negative ions and performs the first fluid filtration on the fluid; the fluid after the first fluid filtration is introduced into the fluid filter, and the fluid filter receives the fluid output by the negative ion generator and performs the second fluid filtration; the fluid processed by the fluid filter is guided to the air outlet of the housing through the output module for output.

[0075] The fan is disposed at the air inlet of the housing, and its outlet direction is toward the air outlet of the housing, so that the fan guides the fluid at the air inlet of the housing toward the air outlet. First, the fan drives the fluidity of the incoming fluid, and the fan outputs wind force toward the guide pipe, providing power for the transmission of negative ions. The fan can adjust the output air volume by changing the fan power. When a high concentration of negative ions is required, the fan current or speed can be increased.

[0076] A negative ion generator is located close to the air inlet of the housing to receive the fluid at the air inlet of the housing to generate negative ions and perform a first fluid filtration.

[0077] Among them, the negative ion generator includes a honeycomb pipe and negative ion powder. The honeycomb pipe is provided with multiple irregular pipes, and the multiple irregular pipes are used to improve the flow rate of the fluid. The length of the irregular pipe is determined according to actual needs; the negative ion powder is sprayed on the inner wall of the honeycomb pipe. When the negative ion concentration is drained in the honeycomb pipe, negative ions are generated based on the negative ion powder on the inner wall of the honeycomb pipe and the airflow is straightened.

[0078] Specifically, in some optional implementations of this embodiment, step S220 includes receiving fluid introduced by a fan and passing the introduced fluid through a plurality of irregularly shaped pipes disposed within a honeycomb pipe for a first fluid filtration. During the fluid drainage within the honeycomb pipe, negative ion powder coated on the inner walls of the pipe generates negative ions for the fluid flowing through the pipe. The negative ion generator comprises numerous small, square, circular, or hexagonal pipes of equal cross-section arranged in parallel, forming a honeycomb-like shape. The pipes are uniformly coated with negative ion powder using a special process. This powder primarily generates negative ions and directs the fluid parallel to the pipe axis, breaking large vortices within the fluid into smaller vortices. Furthermore, the friction created by the honeycomb pipes on the fluid also helps improve the fluid's velocity distribution. The relatively uniform negative ions generated by the honeycomb negative ion generator, driven by the pure fluid, pass through the damping mesh. Furthermore, the negative ion concentration generated can be adjusted by increasing or decreasing the number of pipes or pipe length within the honeycomb pipe. Negative ion concentration can also be adjusted by increasing or decreasing the number of honeycomb panels. Before the fluid flows into the negative ion generator, the fluid passes through a high-efficiency filter to remove impurities such as particulate matter in the air to form a pure fluid.

[0079] A fluid filter, located at the end of the negative ion generator, for receiving the fluid output by the negative ion generator and performing a second fluid filtration, wherein the fluid filter is provided with a plurality of adjacent wind tunnels to adjust the flow rate and uniformity of the fluid through the multiple wind tunnels;

[0080] In some optional implementations of this embodiment, step S230 includes: adjusting the flow rate and uniformity of the fluid through at least two layers of damping nets in the fluid filter, wherein the multiple layers of damping nets are staggered.

[0081] The fluid filter comprises at least two layers of damping mesh, each equipped with multiple adjacent wind tunnels to regulate the flow rate and uniformity of the fluid. Multiple layers of damping mesh are staggered. The damping mesh reduces fluid turbulence and unevenness. The greater the number of layers and the finer the mesh, the more effective the filtration, but also results in greater pressure loss. In addition to reducing fluid turbulence, the damping mesh also ensures a more uniform distribution of negative ions in the fluid.

[0082] An output module receives the fluid processed by the fluid filter and guides the fluid to the air outlet of the housing for output.

[0083] The output module includes a flow guide tube, a spirit level, an adjustment bracket, and a diversion port. The flow guide tube receives the fluid processed by the fluid filter and adjusts the fluid flowing through it to laminar flow standards. The adjusted fluid is then directed to the air outlet of the housing for output. The length of the flow guide tube is adjustable, and the length of the flow guide tube is adjusted to be longer when the air volume is relatively large, and shorter when the air volume is relatively small. The length of the fluid tube can be adjusted as needed, with a commonly used range of 80cm to 120cm, and can also be 80cm, 90cm, 95cm, 100cm, 105cm, 110cm, 115cm, and 120cm. The flow guide tube ensures that the fluid flowing through the tube meets the laminar flow requirements, which is determined by calculating the Reynolds number.

[0084] The air outlet of shell comprises at least two diverter ports, and described diverter ports are connected with the output end of described guide tube, and a plurality of described diverter ports are arranged axially symmetrically. Diverter ports are sealed and connected at the outlet of guide tube, and diverter ports are central axis symmetrical structure, and diverter ports of different specifications such as two, three, four can be equipped with as needed. During calibration, the negative air ion observation instrument (or referred to as transfer standard instrument) being calibrated can be connected at one of the diverter ports, and the negative air ion observation instrument to be calibrated (according to the number of equipment to be calibrated, the diverter ports of N+1 type are selected) can be connected at other diverter ports, and the relationship between the measurement of specific algorithm standard instrument and negative air ion observation instrument to be calibrated is achieved, thereby realizing the value transfer of the negative air ion observation instrument to be calibrated.

[0085] The single-sensor or multi-sensor air negative ion observation instrument calibrated as described above is used as a transfer standard instrument, and then used in conjunction with the negative ion generation and diversion comparison calibration device; taking two diversion ports as an example, one diversion port is connected to the standard transfer instrument, and the other diversion port is used to receive the calibrated air ion observation instrument, thereby realizing the calibration of the air ion observation instrument with the same wind speed.

[0086] Finally, the specific algorithm is to perform least squares fitting on the air negative ion concentration data measured by the standard transfer instrument and the air negative ion concentration data of the air negative ion observation instrument to be calibrated to obtain a calibration equation, thereby realizing the calibration of the air negative ion observation instrument to be calibrated.

[0087] In some optional implementations of this embodiment, step S240 includes: using a spirit level to detect the horizontal angle of the guide tube and generate a horizontal angle signal; when the adjustment bracket receives the horizontal angle signal from the spirit level, the adjustment bracket compares the horizontal angle of the guide tube in the horizontal angle signal with the initial horizontal angle, and adjusts the guide tube horizontally based on the comparison result. The detection end of the spirit level is connected to the guide tube so that the spirit level can detect the horizontal angle of the guide tube; the signal trigger end of the adjustment bracket is connected to the output end of the spirit level, and the adjustment bracket is connected to the outer shell of the guide tube. When the horizontal angle signal from the spirit level is received, the adjustment bracket adjusts the guide tube horizontally based on the horizontal angle signal. The spirit level and the adjustable bracket are used to check and adjust the level of the guide tube to ensure horizontal transmission of fluid within the tube.

[0088] During calibration, the negative ion generator is adjusted to several gears, that is, negative ions of different concentration levels are generated. Based on the least squares method, the results of the synchronous measurements of the air negative ion observation instrument to be calibrated and the standard instrument at each gear are fitted by the least squares method to obtain the standard equation of the negative ion concentration of the corresponding gear.

[0089] In a shielded environment with constant temperature and humidity, the negative ions produced by the negative ion generator, driven by the fluid, pass through the damping mesh and flow guide tube to form a uniformly distributed fluid, which is then transferred to the diversion port for calibration of the air negative ion meter to be calibrated. During calibration, the negative ion generator can be adjusted to several settings, generating different concentrations of negative ions. The least squares method is then used to fit the results of the simultaneous measurements of the air negative ion meter to be calibrated and the standard instrument at each setting. This method can be used to obtain the standard equation for the air negative ion meter to be calibrated, thereby achieving accurate measurement of the air negative ion meter to be calibrated.

[0090] The fan draws fluid in from the air inlet of the housing and directs the fluid toward the housing's air outlet through the fan's outlet direction. The fluid introduced by the fan is received by a negative ion generator, which generates negative ions and performs a first fluid filtration on the fluid. The fluid after the first filtration is introduced into a fluid filter, which receives the fluid output by the negative ion generator and performs a second fluid filtration. The fluid processed by the fluid filter is directed to the housing's air outlet through an output module. This ensures that the generated negative ions are highly stable and have an accurate concentration. The concentration of the negative ions can be adjusted according to demand, increasing the reliability of the negative ion generation and diversion comparison test device.

[0091] After the shunt, the negative ion concentration of the shunt port is output to the negative air ion observation instrument of the first transfer standard and the negative air ion observation instrument to be calibrated, respectively, and the measurement data of the negative air ion observation instrument of the first transfer standard and the negative air ion observation instrument to be calibrated are obtained respectively, and the measurement data are fitted and calibrated based on the least squares method to obtain the calibration equations of the negative air ion observation instrument of the first transfer standard and the negative air ion observation instrument to be calibrated. It should be noted that the calibration instrument is the negative air ion observation instrument. Wherein, the least squares method is used to fit the calibration analysis process as described above to avoid the present embodiment being too redundant and not listed here one by one.

[0092] In this embodiment, when obtaining a calibration signal, the microcurrent measurement signal of the real-time air negative ion observation instrument is calibrated to obtain the microcurrent measurement signal of the calibrated air negative ion observation instrument, and then the microcurrent measurement signal of the calibrated air negative ion observation instrument is converted into a negative ion concentration according to the sampling volume of the air and the electrical quantity of the basic charge, and the calibrated air negative ion observation instrument is the first transfer standard; at least two diversion ports in the negative ion generation and diversion calibration device are set to divert and output the uniform negative ions; the negative ion concentrations of the diversion ports are output to the air negative ion observation instrument of the first transfer standard and the air negative ion observation instrument to be calibrated, respectively, and the measurement data of the air negative ion observation instrument of the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated are respectively obtained, and the measurement data are fitted to the measurement data of the air negative ion observation instrument of the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation. The negative ion observation has a standard transfer instrument and provides a unified and traceable calibration method, which improves the accuracy and reliability of the observation data, improves work efficiency, ensures the accuracy and reliability of the observation results, and makes the generated negative ions highly stable and the concentration accurate. The concentration of negative ions can be adjusted according to needs, increasing the reliability of the negative ion generation and diversion comparison test device.

[0093] Further references Figure 3 , as a response to the above Figure 1 The present application provides an embodiment of a dynamic calibration device for a multi-sensor air negative ion observation instrument. Figure 1 The method embodiment shown corresponds to the embodiment shown.

[0094] like Figure 3 As shown, the dynamic calibration device of the multi-sensor air negative ion observation instrument described in this embodiment includes: an air negative ion microcurrent calibration device 210, a negative ion generation and diversion comparison test device 220, and a second calibration device 230.

[0095] The microcurrent calibration device 210 for negative air ions is used to calibrate the microcurrent measurement signal of the real-time negative air ion observation instrument to obtain a calibrated microcurrent measurement signal of the negative air ion observation instrument when obtaining the calibration signal, and then convert the calibrated microcurrent measurement signal of the negative air ion observation instrument into a negative ion concentration based on the sampling volume of the air and the amount of the basic charge. The calibrated negative air ion observation instrument serves as the first transfer standard;

[0096] The negative ion generation and diversion comparison test device 220 is used to set at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions;

[0097] The second calibration device 230 is used to output the negative ion concentration of the diversion port to the first transfer standard air negative ion observation instrument and the air negative ion observation instrument to be calibrated, respectively, to obtain the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated, and to fit the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a second calibration equation.

[0098] In this embodiment, when the calibration signal is obtained by the microcurrent calibration device 210 of negative air ions, the microcurrent measurement signal of the real-time negative air ion observation instrument is calibrated to obtain the microcurrent measurement signal of the calibrated negative air ion observation instrument, and then the microcurrent measurement signal of the calibrated negative air ion observation instrument is converted into a negative ion concentration according to the sampling volume of the air and the amount of basic charge. The calibrated negative air ion observation instrument is the first transfer standard; the negative ion generation and diversion comparison test device 220 sets at least two diversion ports in the negative ion generation and diversion calibration device to output the uniform negative ion diversion; the second calibration device 230 outputs the negative ion concentration of the diversion port to the negative air ion observation instrument of the first transfer standard and the negative air ion observation instrument to be calibrated, respectively, and obtains the measurement data of the negative air ion observation instrument of the first transfer standard and the measurement data of the negative air ion observation instrument to be calibrated, and the measurement data are fitted to the measurement data of the negative air ion observation instrument of the first transfer standard and the measurement data of the negative air ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation. The negative ion observation has a standard transfer instrument and provides a unified and traceable calibration method, which improves the accuracy and reliability of the observation data, improves work efficiency, ensures the accuracy and reliability of the observation results, and makes the generated negative ions highly stable and the concentration accurate. The concentration of negative ions can be adjusted according to needs, increasing the reliability of the negative ion generation and diversion comparison test device.

[0099] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A dynamic calibration method for a multi-sensor air negative ion observation instrument, characterized in that: The method comprises the following steps: When obtaining the calibration signal, the microcurrent measurement signal of the real-time single-sensor or multi-sensor air negative ion observation instrument is calibrated to obtain a calibrated microcurrent measurement signal of the air negative ion observation instrument, and then the calibrated microcurrent measurement signal of the air negative ion observation instrument is converted into a negative ion concentration according to the sampling volume of the air and the amount of the basic charge. The calibrated air negative ion observation instrument is used as the first transfer standard; At least two diversion ports are provided in the negative ion generation and diversion calibration device to divert and output the uniform negative ions; The negative ions at the diversion port are output respectively to an air negative ion observation instrument with a first transfer standard and an air negative ion observation instrument to be calibrated, and the measurement data of the air negative ion observation instrument with the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated are obtained respectively. The measurement data are fitted with the measurement data of the air negative ion observation instrument with the first transfer standard and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation.

2. The dynamic calibration method of the multi-sensor air negative ion observation instrument according to claim 1, wherein The step of providing at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions comprises: The negative ion concentration is sucked in from the air inlet of the housing by the fan, and the negative ion concentration introduced is directed toward the air outlet of the housing through the air outlet direction of the fan; The negative ion generator receives the negative ion concentration introduced by the fan, and the negative ion generator evenly distributes the negative ions and performs the first fluid filtration; The negative ions after the first fluid filtration are introduced into the fluid filter, and the fluid filter receives the negative ions output by the negative ion generator and performs a second fluid filtration; The negative ions processed by the fluid filter are guided to the air outlet of the housing through the output module for output.

3. The dynamic calibration method of the multi-sensor air negative ion observation instrument according to claim 2, characterized in that: The steps of receiving the negative ion concentration introduced by the fan by the negative ion generator, uniformly distributing the negative ions by the negative ion generator and performing the first fluid filtration include: The negative ion concentration introduced by the fan is received, and the introduced negative ion concentration is filtered for the first time through multiple irregular pipes set in the honeycomb pipe. When the negative ion concentration is drained in the honeycomb pipe, negative ions are generated based on the negative ion powder on the inner wall of the honeycomb pipe and the airflow is straightened.

4. The dynamic calibration method of a multi-sensor air negative ion observation instrument according to claim 3, wherein: The step of guiding the negative ions processed by the fluid filter to the air outlet of the housing through the output module for output includes: The negative ions processed by the fluid filter are received through the guide tube, and the negative ions flowing through are adjusted to the laminar flow standard. The adjusted negative ions are guided to the air outlet of the shell for output.

5. The dynamic calibration method of a multi-sensor air negative ion observation instrument according to claim 4, wherein: After the steps of receiving the negative ions processed by the fluid filter through the flow guide tube, adjusting the negative ions flowing through to a laminar flow standard, and directing the adjusted negative ions to the air outlet of the housing for output, the method further comprises the following steps: The horizontal angle of the guide tube is detected by a level meter and a horizontal angle signal is generated; When the adjusting bracket receives the horizontal angle signal of the level meter, the adjusting bracket compares the horizontal angle of the guide tube in the horizontal angle signal with the initial horizontal angle and adjusts the guide tube horizontally according to the comparison result.

6. The dynamic calibration method of a multi-sensor air negative ion observation instrument according to claim 2, characterized in that: After the step of receiving the negative ion concentration introduced by the fan by the negative ion generator, the method further comprises: During calibration, the negative ion generator is adjusted to several gears, that is, negative ions of different concentration levels are generated. Based on the least squares method, the results of the synchronous measurements of the air negative ion observation instrument to be calibrated and the standard instrument at each gear are fitted by the least squares method to obtain the standard equation of the negative ion concentration of the corresponding gear.

7. A dynamic calibration device for a multi-sensor air negative ion observation instrument, characterized in that: The device comprises: The microcurrent calibration device for negative air ions is used to calibrate the microcurrent measurement signal of a real-time single-sensor or multi-sensor negative air ion observation instrument to obtain a calibrated microcurrent measurement signal of the negative air ion observation instrument when obtaining a calibration signal. The calibrated microcurrent measurement signal of the negative air ion observation instrument is then converted into a negative ion concentration based on the sampling volume of the air and the amount of basic charge. The calibrated negative air ion observation instrument serves as the first transfer standard. A negative ion generation and diversion comparison test device is used to set at least two diversion ports in the negative ion generation and diversion calibration device to divert and output the uniform negative ions; The second calibration device is used to output the negative ion concentration of the diversion port to the first transfer standard air negative ion observation instrument and the air negative ion observation instrument to be calibrated, respectively, to obtain the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated, and to fit the measurement data of the first transfer standard air negative ion observation instrument and the measurement data of the air negative ion observation instrument to be calibrated based on the least squares method to obtain a calibration equation.

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