CN112180044A - Calibration method and device for air negative ion collector and operation method of device - Google Patents
Calibration method and device for air negative ion collector and operation method of device Download PDFInfo
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- CN112180044A CN112180044A CN202011051585.1A CN202011051585A CN112180044A CN 112180044 A CN112180044 A CN 112180044A CN 202011051585 A CN202011051585 A CN 202011051585A CN 112180044 A CN112180044 A CN 112180044A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
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- G—PHYSICS
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
Abstract
A calibration method and a device for an air negative ion collector and an operation method of the device are provided, wherein the calibration method for the air negative ion collector comprises the following steps: irradiating a certain volume of closed or non-closed air with a preset radiation dose to generate a preset number of negative ions; releasing the preset number of negative ions; the preset quantity of negative ions is used for being captured by the air negative ion collector so as to calibrate the air negative ion collector. The invention utilizes the radiation source to irradiate the air to generate the negative ions with the preset quantity, and then the negative ions with the preset quantity are used for calibrating the air negative ion collector, so that the air negative ion collector can achieve sufficient precision, the measurement stability is good, the repeatability is good, the consistency is good, the source tracing is realized, and the relevant national standard preparation of the air negative ion measuring instrument can be well supported.
Description
Technical Field
The application relates to the field of negative ion measurement, in particular to a calibration method and device for an air negative ion collector and an operation method of the device.
Background
Air anions are a collective term for negatively charged single gas molecules and light ion clusters. In a natural ecosystem, a forest is an important place for generating air negative ions and has a regulating effect on the aspects of air purification, urban microclimate and the like. Generally speaking, in places with good ecological environment, the content of negative ions in the air is higher; and in places with poor environment, the content of negative ions in the air is lower. The concentration level is one of the important indexes for evaluating the air quality.
The environmental problem is a problem which is very concerned by governments at all levels and the masses of people. "promoting ecological civilization and building beautiful china" is an important consensus that governments in various places practice central relevant environmental construction policies at present. With the continuous and deep environmental improvement, the ecological environment quality is continuously improved, and the air quality is better and better. But people not only can meet the requirements of clean air and pollution-free air, but also ecological air and fresh air become higher-level requirements of people. Scenic spots and regions with air negative ions as characteristics are continuously increased, and tourism, leisure and entertainment activities aiming at health preservation and health care of people are greatly promoted. Currently, various places have aroused projects which are very beneficial to physical and mental health of people, such as natural oxygen bar evaluation and selection, health-care leisure base construction and the like, wherein the content of air negative ions is an important index in evaluation and assessment of various ecological environments. However, the negative ions in the air can not be seen and found, and can only be measured by an instrument, so that how to accurately measure the content of the negative ions in the air becomes an important problem.
The air negative ions have strong activity, show fluctuation and instability, and bring great difficulty to accurate measurement. The air negative ion measuring instrument commonly used in the market at present is generally calibrated by adopting a comparison method and an equivalent current method, and due to the limitation of the two methods, the instrument generally has the defects of low measurement precision, poor consistency, poor repeatability, incapability of tracing and the like, so that the scientificity and objectivity of negative ion data are frequently questioned by authority experts of weather and forestry in national natural oxygen bar evaluation activities for many times. The problem of calibrating the instrument calibration is urgently needed to be solved in the market.
Due to the lack of scientific calibration and calibration methods, the air negative ion detection industry is lack of related national standard support for a long time, so that the development of the industry is restrained, and the supply and demand contradiction is aggravated. Currently, the air anion observation method is listed in the second recommended national standard plan list in 2019, and the national standard construction which is urgently needed by the industry is started. The method provided by the invention can accurately calibrate the measurement precision of the air negative ion detector and provides a standard measurement calibration method for the instrument. The method has the advantages of facilitating the promotion of the construction of relevant national standards related to the calibration of the air anion measuring instrument, promoting the stable development of the industry and promoting the continuous improvement of the ecological environment.
At present, the calibration method in the prior art has low precision and poor stability, and cannot accurately calibrate the air negative ion measuring instrument.
Disclosure of Invention
Objects of the invention
The invention aims to provide a calibration method and a calibration device for an air negative ion collector, which have high measurement precision, good measurement stability and good repeatability, and an operation method of the device.
(II) technical scheme
In order to solve the above problems, a first aspect of the present invention provides a calibration method for an air negative ion collector, including: irradiating the air with a preset radiation dose to generate a preset number of negative ions; releasing the preset number of negative ions; the preset quantity of negative ions is used for being captured by the air negative ion collector so as to calibrate the air negative ion collector.
Optionally, the irradiating the air with the preset radiation dose to generate the preset number of negative ions includes: and irradiating the air with preset density by using preset radiation dose to generate a preset number of negative ions.
Optionally, the irradiating the air with the preset density at the preset radiation dose to generate the preset number of negative ions includes: irradiating air with preset density by using preset radiation dose, so that the air with the preset density absorbs the preset radiation exposure; and the air with the preset density absorbs the preset radiation exposure to generate a preset number of negative ions.
Optionally, the air absorption exposure is: (m/3600). times.2.97X 10-2＝m×8.25×10-6(C/(Kg. s)); the absorbed exposure per volume of air is: m 8.25X 10-6×1.29×10-6＝m×1.064×10-11(C/(s·cm3) ); wherein m is radiation dose rate, Gy/h, m/3600 is Gy/s, and 1Gy absorbed dose corresponds to 2.97 × 10-2C/Kg irradiation amount, air density of 1.29X 10-6Kg/cm3。
Optionally, the preset number of negative ions is: mx 1.064X 10-11/(1.6×10-19)＝m×6.65×107(per/(s-cm)3) ); wherein the electric quantity of one electron is 1.6 × 10-19(C/one).
Optionally, the releasing the preset number of negative ions, where the preset number of negative ions are used for being captured by an air negative ion collector to calibrate the air negative ion collector, includes: releasing a preset volume of air containing the preset number of negative ions at a preset flow rate.
Optionally, the amount of negative ions released per second is: n ═ mx 6.65 × 107XQ/V (pieces/cm)3)；
Wherein the preset volume is V and the unit is cm3The preset flow rate is Q, and the unit is cm3/s。
Alternatively, if V ═ Q, then the amount of negative ions released per second is: n ═ mx 6.65 × 107(pieces/cm)3)。
The second aspect of the present invention also provides a calibration method for an air negative ion collector, including: receiving a preset number of negative ions to calibrate the air negative ion collector; the preset number of negative ions is generated by irradiating air with a preset radiation dose.
The third aspect of the present invention provides a calibration apparatus for an air negative ion collector, which is characterized by comprising: an ionization chamber for containing air; the radiation source is used for irradiating the air to obtain the air containing negative ions; generating a preset number of negative ions when a radiation source irradiates the air in the ionization chamber with a preset radiation dose; the ionization chamber is used for generating and releasing the preset quantity of negative ions so as to calibrate the air negative ion collector.
Optionally, the ionization chamber is made of metal and has a thickness of 0.5-1.2 mm.
Optionally, an air outlet and an air inlet are arranged on the ionization chamber; the air outlet is used for discharging air containing the preset number of negative ions to the air negative ion collector; the air inlet is used for receiving air without negative ions.
Optionally, the calibration device for the air negative ion collector further comprises a return pipe; one end of the backflow pipe is connected with the air inlet, and the other end of the backflow pipe is used for being connected with the output end of the air anion collector, so that air flowing through the air anion collector flows back to the ionization chamber.
Optionally, a fan is disposed on the air outlet and/or the air inlet to circulate air.
Optionally, in use, the fan discharges an air flow equal to the volume of the ionization chamber.
The fourth aspect of the invention provides an operation method of a calibration device of an air negative ion collector, which comprises the following steps: opening a radiation source ionization chamber, and irradiating air in the ionization chamber with a preset radiation dose to generate a preset number of negative ions; starting a fan to discharge air containing a preset number of negative ions in the ionization chamber at a preset flow rate.
(III) advantageous effects
The technical scheme of the invention has the following beneficial technical effects:
the invention utilizes the radiation source to irradiate the air to generate the negative ions with the preset quantity, and then the negative ions with the preset quantity are used for calibrating the air negative ion collector, so that the air negative ion collector can achieve sufficient precision, the measurement stability is good, the repeatability is good, the consistency is good, the source tracing is realized, and the relevant national standard preparation of the air negative ion measuring instrument can be well supported.
Drawings
FIG. 1 is a schematic diagram of an air negative ion collector for collecting negative ions;
FIG. 2 is a flowchart of a calibration method of the air negative ion collector of embodiment 3;
fig. 3 is a schematic structural diagram of the calibration apparatus for an air negative ion collector provided in embodiment 5;
fig. 4 is a top view of the ionization chamber provided in example 5.
Reference numerals:
1: an ionization chamber; 11: an exhaust port; 12: an air inlet; 2: a radiation source; 3: a return pipe; 4: a fan;
100: an air negative ion collector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the drawings a schematic view of a layer structure according to an embodiment of the invention is shown. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The air anion collector 100 of the present application may also be referred to as an air anion meter.
Example 1
The present embodiment provides a method for measuring an anion detector using a comparative method.
And taking a negative ion detector which is considered to be accurate as a calibration machine. During calibration, the position of the instrument to be tested is as close as possible to the position of the calibration machine, and the sampling airflow keeps the same direction. And (3) generating air negative ions with different concentrations by using a negative ion generator, and comparing the reading of the instrument to be measured with the reading of the calibration machine by adjusting the concentration of the air negative ions. The closer the reading of the instrument to be measured is to the calibration machine, the more accurate the reading is considered and the higher the precision is.
However, the comparison method has the defects that air negative ions are active and light air components, move rapidly, are generated continuously and are absorbed continuously, and show strong volatility. Is easily influenced by static electricity, an environmental electromagnetic field, wind direction, air temperature and humidity and the like, and keeps dynamic balance adaptive to external conditions.
When the anion generator is used as a signal source, the release amount of anions (the accuracy of the source) is difficult to determine, and the signal intensity of the anion generator is different in different directions, which directly influences the comparison accuracy and consistency. The higher volatility makes data repeatability not guaranteed. Therefore, the comparison method has low precision, poor stability and no traceability, and is only suitable for qualitative measurement.
Example 2
Fig. 1 is a schematic diagram of an air negative ion collector for collecting negative ions.
The embodiment provides a method for measuring a negative ion detector by using an equivalent current method.
As shown in fig. 1, the process of the air anion collector 100 converting the captured air anions into current: the number of the air negative ions is set as N (one/cm)3) And the flow rate of the sampled air is Q (cm)3S), assuming that the system can capture all the ions in the air passing through the collecting tube, the number of the captured ions per second is N × Q on average, and the electric quantity of one electron is 1.6 × 10-19Coulomb, then the obtained current I is M × N × 1.6 × 10-19. PublicThe formula is expressed as follows:
I＝M×N×1.6×10-19 (1)
the equivalent current law is a reverse derivation calculation of the above process, and firstly, a quantitatively measurable weak current I is used to replace an ion signal, which is called equivalent current replacement, and the current I is directly input from the induction bar. The air anion number is inversely calculated by formula (1):
N＝I/(M×1.6×10-19) (2)
however, the equivalent current method has the defect that the air negative ions passing through the collecting tube cannot be completely captured due to the influence of air flow, field intensity, ion mobility, diameter of the induction rod and the like, so that the problem of capturing efficiency exists. For accurate equivalence, the capture efficiency needs to be accurately calculated first, but the capture efficiency measurement and calculation are relatively difficult. Secondly, as an actual instrument, the current leakage problem exists, and the equivalent current method cannot be completely equivalent because the equivalent current method cannot take the situation into consideration, so that certain errors exist.
Example 3
Fig. 2 is a flowchart of a calibration method of the air negative ion collector 100 according to embodiment 3.
As shown in fig. 2, the present embodiment provides a calibration method of an air negative ion collector 100, including: irradiating the air with a preset radiation dose to generate a preset number of negative ions; releasing a preset number of negative ions; a predetermined number of negative ions are used to be captured by the air negative ion collector 100 to calibrate the air negative ion collector 100.
Wherein, shine the air with preset radiation dose, generate the anion of predetermineeing quantity, include: and irradiating the air with preset density by using preset radiation dose to generate a preset number of negative ions.
Specifically, the air absorption exposure is: (m/3600). times.2.97X 10-2＝m×8.25×10-6(C/(Kg. s)); the absorbed exposure per volume of air is: m 8.25X 10-6×1.29×10-6＝m×1.064×10-11(C/(s·cm3) ); wherein m is the radiation dose rate, the unit is Gy/h, and the unit of m/3600 is GyThe absorbed dose of 1Gy corresponds to 2.97X 10-2C/Kg irradiation amount, air density of 1.29X 10-6Kg/cm3. The preset number of negative ions is: mx 1.064X 10-11/(1.6×10-19)＝m×6.65×107(per/(s-cm)3) ); wherein the electric quantity of one electron is 1.6 × 10-19(C/one).
Specifically, the method releases a preset number of negative ions, and the preset number of negative ions are used for calibrating the air negative ion collector 100, and the method includes: a preset volume of air containing a preset number of negative ions is discharged at a preset flow rate. The amount of negative ions generated per second was: n ═ mx 6.65 × 107XQ/V (pieces/cm)3) (ii) a Wherein the preset volume is V and the unit is cm3The preset flow rate is Q, and the unit is cm3/s。
Preferably, if V ═ Q, the amount of anions generated per second is: n ═ mx 6.65 × 107(pieces/cm)3)。
Example 4
The embodiment provides a calibration method of an air negative ion collector, which comprises the following steps: receiving a preset number of negative ions to calibrate the air negative ion collector 100; the preset number of negative ions is generated by irradiating air with a preset radiation dose.
Example 5
Fig. 3 is a schematic structural diagram of the calibration apparatus for an air negative ion collector provided in embodiment 5.
This embodiment provides an air anion collector calibration device, includes: an ionization chamber 1 for containing air; the radiation source 2 is used for irradiating the air to obtain the air containing negative ions; generating a preset number of negative ions when the radiation source 2 irradiates the air in the ionization chamber 1 with a preset radiation dose; the ionization chamber 1 is used for generating and releasing a preset amount of negative ions to calibrate the air negative ion collector 100.
Alpha rays, beta rays and gamma rays can ionize air, but the three rays have different penetrability, the alpha rays have the worst penetrability, the beta rays have the second highest penetrability, and the gamma rays have the highest penetrability. Gamma rays can easily penetrate barriers such as thin metal and concrete, so that irradiated air is ionized. The radiation source 2 is preferably a gamma ray machine. The gamma ray machine is used for emitting gamma rays, and the radiation dose rate can be adjusted. The diameter of the radiation spot is larger than the size of the ionization chamber 1, namely, the ionization chamber 1 is ensured to be completely placed in the gamma-ray radiation range. Due to different incident angles, the blocking and attenuation of the rays caused by the penetration of the metal wall of the ionization chamber 1 are different. The repeatability and traceability of the test may be affected, so the incident direction of the gamma ray is preferably perpendicular to the direction of the collector.
Fig. 4 is a top view of the ionization chamber provided in example 5.
The ionization chamber 1 is provided with an exhaust port 11 and an air inlet 12; the air outlet 11 is used to discharge air including a preset number of negative ions to the air negative ion collector 100; the air inlet 12 is for receiving air without negative ions. The exhaust port 11 and/or the intake port 12 is provided with a fan 4, which is disposed in the fan holder to circulate air.
Specifically, the ionization chamber 1 is a metal box with a rectangular parallelepiped outline, and the volume size is related to the gas flow. One side of the box is provided with an air outlet 11 and an air inlet 12, the air outlet 11 is an opening which is in butt joint with a collecting pipe of the air anion collecting device and is used for inputting air containing anions with preset content into the air anion collecting device, the air inlet 12 is communicated with the output end of the air anion collecting device, and during measurement, a closed space is formed among the air anion collecting device 100, the ionization chamber 1 and the return pipe 3 so as to prevent external interference. Fig. 4 shows a case where the fan is provided to the intake port 12. Specifically, the fan drives the air containing the negative ions to circulate in the enclosed space, and when the air passes through the air negative ion collector 100, the negative ions are captured by the air negative ion collector 100, so as to calibrate the air negative ion collector 100. The larger the air flow is, the more the quantity of generated negative ions per unit time is, and the more the quantity of the captured negative ions is;
further specifically, the ionization chamber 1 is preferably stainless steel, which is a non-magnetic material. In order to ensure good gamma ray penetration, the ionization chamber 1 is made of a thin stainless steel plate material, and the thickness thereof is as follows: 0.5-1.2 mm, gamma ray can easily penetrate thin stainless steel plate to make it electrically conductiveAir in the separation chamber 1 is ionized to generate air negative ions. The gamma rays are continuously irradiated, and the air in the ionization chamber 1 is continuously ionized. The air in the ionization chamber 1 is driven by the fan 4 to circulate between the ionization chamber 1 and the collecting pipe, and continuously generated air negative ions are collected by the instrument collecting pipe and consumed in the form of current. The generation amount and the consumption amount of negative ions in the ionization chamber 1 are balanced. A saturation voltage with a mobility of 0.4 is applied, by which is meant that the current does not increase significantly any more when the voltage is increased. Voltage size: the pressure is adjusted between 24V and 36V. The gas density will be affected by the pressure level, and the density of the negative ions will also be affected, so to ensure sufficient accuracy, the pressure level is required to be: 1.013X 105Pascal +/-2%. Optionally, the calibration device for the air negative ion collector further comprises a return pipe 3; one end of the return pipe 3 is connected with the air inlet 12, and the other end of the return pipe 3 is used for being connected with the output end of the air anion collector 100, so that the air flowing through the air anion collector 100 flows back into the ionization chamber 1. To prevent negative ions or impurities in the outside air from affecting the measurement result. When the ion chamber is designed in a non-closed open mode (namely, the air inlet 12 of the ionization chamber 1 is communicated with the outside), air ions cannot be limited in a space with a certain volume, the total number of the ions is uncertain, and accurate measurement cannot be achieved.
Alternatively, in use, the flow of air discharged by fan 4 is equal to the volume of ionization chamber 1. The significance lies in that: in 1 second, m V6.65X 10 produced in the ionization chamber 17The quantity of negative ions just circulates in the sealed space for one circle, and the negative ions in the air are captured by the collector. The readings of the air negative ion detector should be: n ═ mx 6.65 × 107(pieces/cm 3). The calculation is simple, and the error is reduced.
Example 6
The embodiment provides an operation method of an air negative ion collector calibration device, which comprises the following steps: opening the ionization chamber 1 of the radiation source 2, and irradiating the air in the ionization chamber 1 with a preset radiation dose to generate a preset number of negative ions; the fan 4 is started to discharge the air containing a preset amount of negative ions in the ionization chamber 1 at a preset flow rate by the fan 4.
The specific operation flow is as follows:
s1, ensuring that the gamma-ray machine is in a shutdown state;
s2, connecting the air negative ion collector 100 with the ionization chamber 1;
s3, placing the air negative ion collector 100 connected with the ionization chamber 1 on a radiation laboratory experiment bench, adjusting the height and the horizontal direction of the bench to enable a radiation target center to be in the middle of the ionization chamber 1, and aligning by means of a laser sight.
And S4, the collector is connected with the air negative ion detector mainboard to supply power to the detector, so that the whole machine enters a starting state and is preheated for 5 minutes. The air negative ion collector 100 enters the working state and the fan 4 is started. At this time, the air negative ion treatment has a low value because the gamma ray machine is not turned on.
And S5, starting an electric door of the laboratory, closing the door of the laboratory, and preparing a corresponding gamma-ray radiation source 2 through computer operation, wherein the assumed radiation dose rate is m (Gy/h, Gray/h).
S6, the quantity of air anions in the ionization chamber 1 under the irradiation of m irradiation dose according to the formula 2 is
N＝m×6.65×107(pieces/cm)3)
And S7, starting gamma ray radiation, and monitoring and observing the measurement value of the instrument through a laboratory. And waiting for 2 minutes, and recording data when the number displayed by the instrument is stable. And comparing with the middle N calculated in the previous step. After stabilization, the air negative ion collector 100 is calibrated.
And S8, changing the radiation source 2 with different irradiation quantities, repeating the steps of 5-8, and performing linear calibration.
Example 7
An air negative ion collector calibration device in embodiment 5 is used for calibration test of an air negative ion collector, which is referred to GB/T28628-. Testing environmental conditions and sites:
temperature: 18.7 deg.C
Humidity: 31.5% RH
A place: china institute of metrology science, 10 th building 120 room
And others: air pressure 101.2kpa
The measurement range is 1X 10-5Gy/h～1×10-1Gy/h, inaccuracy/accuracy rating of 3.2% (k 2).
The test method and conditions are as follows:
1. the instrument was tested in a 137Cs gamma radiation field using the surrogate method.
2. The instrument was fully preheated with the source geometric center on the same axis as the detector center.
The test results are given in the following table:
it is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (16)
1. A calibration method for an air negative ion collector is characterized by comprising the following steps:
irradiating the air with a preset radiation dose to generate a preset number of negative ions;
releasing the preset number of negative ions;
the preset quantity of negative ions is used for being captured by the air negative ion collector so as to calibrate the air negative ion collector.
2. The calibration method of the air negative ion collector according to claim 1,
the irradiating the air with the preset radiation dose to generate the negative ions with the preset number comprises:
and irradiating the air with preset density by using preset radiation dose to generate a preset number of negative ions.
3. The calibration method of the air negative ion collector according to claim 2, wherein the irradiating the air with the preset density at the preset radiation dose to generate the preset number of negative ions comprises:
irradiating air with preset density by using preset radiation dose, so that the air with the preset density absorbs the preset radiation exposure;
and the air with the preset density absorbs the preset radiation exposure to generate a preset number of negative ions.
4. The calibration method of the air negative ion collector according to claim 3, wherein the air absorption irradiation dose is as follows:
(m/3600)×2.97×10-2＝m×8.25×10-6(C/(Kg·s))；
the absorbed exposure per volume of air is:
m×8.25×10-6×1.29×10-6＝m×1.064×10-11(C/(s·cm3))；
wherein m is radiation dose rate, Gy/h, m/3600 is Gy/s, and 1Gy absorbed dose corresponds to 2.97 × 10-2C/Kg irradiation amount, air density of 1.29X 10-6Kg/cm3。
5. The method for calibrating the air negative ion collector according to claim 4, wherein the preset number of negative ions is as follows:
m×1.064×10-11/(1.6×10-19)＝m×6.65×107(per/(s-cm)3))；
Wherein the electric quantity of one electron is 1.6 × 10-19(C/one).
6. The method for calibrating an air anion collector according to claim 5, wherein the releasing the preset number of anions for being captured by the air anion collector to calibrate the air anion collector comprises:
releasing a preset volume of air containing the preset number of negative ions at a preset flow rate.
7. The method for calibrating an air anion collector according to claim 6, wherein the quantity of anions released per second is as follows:
N＝m×6.65×107XQ/V (pieces/cm)3)；
Wherein the preset volume is V and the unit is cm3The preset flow rate is Q, and the unit is cm3/s。
8. The calibration method of the air negative ion collector according to claim 7,
if V ═ Q, then the amount of negative ions released per second is:
N＝m×6.65×107(pieces/cm)3)。
9. A calibration method for an air negative ion collector is characterized by comprising the following steps:
capturing a preset number of negative ions to calibrate the air negative ion collector;
the preset number of negative ions is generated by irradiating air with a preset radiation dose.
10. The utility model provides an air anion collector calibration device which characterized in that includes:
an ionization chamber (1) for containing air;
the radiation source (2) is used for irradiating the air to obtain the air containing negative ions;
generating a preset number of negative ions when a radiation source (2) irradiates the air in the ionization chamber (1) with a preset radiation dose;
the ionization chamber (1) is used for generating and releasing the preset quantity of negative ions so as to calibrate the air negative ion collector (100).
11. The calibration device of the air negative ion collector according to claim 10, wherein the ionization chamber (1) is made of metal and has a thickness of 0.5-1.2 mm.
12. The calibration device of the air negative ion collector according to claim 10, wherein the ionization chamber (1) is provided with an air outlet (11) and an air inlet (12);
the air outlet (11) is used for discharging air containing the preset number of negative ions to the air negative ion collector (100);
the air inlet (12) is used for receiving air without negative ions.
13. The calibration device of the air negative ion collector, according to claim 12, further comprises a return pipe (3);
one end of the return pipe (3) is connected with the air inlet (12), and the other end of the return pipe (3) is used for being connected with the output end of the air anion collector (100) so that air flowing through the air anion collector (100) flows back into the ionization chamber (1).
14. The calibration device of the air negative ion collector in claim 12 or 13, wherein a fan (4) is arranged on the air outlet (11) and/or the air inlet (12) to circulate air.
15. The calibration device of the air negative ion collector of claim 14,
when in use, the air flow discharged by the fan (4) is equal to the volume of the ionization chamber (1).
16. A method of operating an air anion collector calibration apparatus, for operating the air anion collector calibration apparatus of claim 14 or 15, comprising:
starting a radiation source (2), irradiating air in the ionization chamber (1) with a preset radiation dose, and generating a preset number of negative ions;
starting the fan (4) to enable the fan (4) to discharge the air containing the preset number of negative ions in the ionization chamber (1) at a preset flow rate.
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