CN114832138B - Method and device for detecting sterilizing effect of UVC ultraviolet radiation - Google Patents
Method and device for detecting sterilizing effect of UVC ultraviolet radiation Download PDFInfo
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- 230000005855 radiation Effects 0.000 title claims abstract description 105
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 74
- 230000002070 germicidal effect Effects 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 25
- 230000010287 polarization Effects 0.000 claims description 10
- 230000007547 defect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 18
- 238000012806 monitoring device Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000711573 Coronaviridae Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000607142 Salmonella Species 0.000 description 1
- 241000191940 Staphylococcus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
- A61L2/28—Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/24—Apparatus using programmed or automatic operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
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Abstract
The invention provides a method for detecting the sterilizing effect of UVC ultraviolet radiation, which relates to the technical field of ultraviolet sterilization and comprises the following steps: step one, calculating the ultraviolet radiation dose radiated on the sterilization surface in real time; step two, comparing the radiation dose with a database in which the relation between the sterilization rate and the radiation dose is recorded in real time to obtain the real-time sterilization rate; and step three, displaying the sterilization rate in real time. The invention also provides a device for detecting the sterilizing effect of the UVC ultraviolet radiation, and the method and the device for detecting the sterilizing effect of the UVC ultraviolet radiation can detect the sterilizing rate of the sterilizing lamp on the sterilizing surface in real time, show the sterilizing rate in real time and further guide a user to accurately use the sterilizing lamp so as to facilitate the user to fully sterilize an object to be sterilized by using the UVLED sterilizing lamp.
Description
Technical Field
The invention relates to the technical field of ultraviolet sterilization, in particular to a method and a device for detecting ultraviolet radiation sterilization effect of UVC.
Background
Ultraviolet rays have very wide applications in life, and have different functions according to different wavelengths. Wherein the ultraviolet wavelength of UVC wave band is 200-275 nm, also known as short wave sterilization ultraviolet, and is commonly used in ultraviolet germicidal lamps. As the ultraviolet lamp is used, the intensity of the ultraviolet light emitted by the ultraviolet lamp will also change, and the longer the time, the weaker the intensity of the ultraviolet light. In order to ensure the sterilization rate, the ultraviolet lamp is generally replaced when the service life of the ultraviolet lamp exceeds 25 percent.
In the prior art, generally, only the improvement of the use efficiency of the UVLED bactericidal lamp and the protection of a human body are considered, but the most efficient bactericidal effect of the UVLED bactericidal lamp cannot be guaranteed, and the service life of the UVLED bactericidal lamp cannot be prolonged so as to achieve economic benefits; the sterilizing effect of the UVLED sterilizing lamp changing along with the time cannot be reflected. The UVLED bactericidal lamp can be completely sterilized under different ultraviolet intensities, and therefore common users cannot accurately use the UVLED bactericidal lamp.
Disclosure of Invention
The invention aims to provide a detection method and a detection device for the sterilizing effect of UVC ultraviolet radiation, which are used for solving the problems in the prior art and facilitating users to use UVLED sterilizing lamps to perform full sterilization.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a method for detecting the sterilizing effect of UVC ultraviolet radiation, which comprises the following steps:
step one, calculating the ultraviolet radiation dose radiated on the sterilization surface in real time;
step two, comparing the radiation dose with a database in which the relation between the sterilization rate and the radiation dose is recorded in real time to obtain the real-time sterilization rate;
and step three, displaying the real-time sterilization rate in real time.
Preferably, the radiation dose in the first step is calculated by the following formula:
in the formula (1), the reaction mixture is,
the unit is mW/cm for radiation dose 2 T is the irradiation time in s, I is the radiation intensity of the UVC ultraviolet rays emitted by the germicidal lamp at the germicidal surface, I is mW/cm 2 。
Preferably, the radiation intensity I at the sterilization surface is directly detected by an ultraviolet UVC sensor, and the change of the real-time sterilization rate with time in the third step is shown in real time through a chart;
and step four, when the real-time sterilization rate reaches more than 99.99 percent, the control unit controls the sterilization lamp to be turned off.
Preferably, the radiation intensity I at the germicidal surface is calculated using the following formula:
wherein I is UVC radiation intensity at the sterilization surface and has unit of mW/cm 2 Q is the power of the germicidal lamp in mW, sigma is the ultraviolet attenuation coefficient, and x is the distance between the germicidal surface and the germicidal lamp in cm;
ideally, the ultraviolet attenuation coefficient σ is calculated by the following equation:
wherein,
and
in order to define the constant number of the optical disk,
the wavelength of ultraviolet rays in UVC wave band is in nm.
Preferably, when considering the polarization and polarization phenomena of the ultraviolet radiation during transmission, the attenuation coefficient σ is calculated by the following formula:
wherein N is the refractive index of ultraviolet rays in air, N is the volume density of gas molecules, rho represents the polarization defect in the ultraviolet ray scattering process, and the polarization defect rho in the air is approximately equal to 0.04 under the standard pressure and temperature;
the scattering of ultraviolet light by suspended particles in air is calculated using the following formula:
a and B are respectively a definition constant, and the numerical values of A and B are defined by a method of actually measuring empirical data;
formula (2), formula (3), formula (4), formula (5) and formula (6) are substituted for formula (1) to obtain:
（7）。
preferably, in consideration of the influence of the values of the ambient temperature, the humidity and the pm2.5 on the real-time sterilization rate, the influence of the values of the ambient temperature, the humidity and the pm2.5 on the sterilization rate is equivalently converted into the influence on the radiation dose, and therefore, the corrected radiation dose is calculated by using the following formula:
in the formula:
1 is the corrected radiation dose, and k is the correction coefficient;
k = k1 k2 k3, k1 is the temperature calibration coefficient, k2 is the humidity calibration coefficient, k3 is the pm2.5 calibration coefficient;
when the actual temperature is collected to be higher than 30 ℃ or lower than 20 ℃, the ultraviolet radiation dose is reduced by 20%, namely k1=0.8, and when the actual temperature is collected to be not higher than 30 ℃ and not lower than 20 ℃, k1= 1;
when the relative humidity in the air is higher than 50%, the ultraviolet radiation dose is reduced by 33.3%, i.e. k2=0.667, and when the relative humidity is higher than 70%,the uv radiation dose is reduced by 66.7%, i.e. k2=0.333, when the relative humidity in air is not higher than 50%, k2= 1; when PM2.5 is higher than 75ug/m 2 When the UV radiation dose is reduced by 30%, i.e. k3=0.7, when PM2.5 is not higher than 75ug/m 2 When k3= 1.
The invention also provides a device for detecting the sterilizing effect of the UVC ultraviolet radiation, which comprises: the ultraviolet radiation monitoring device and the display screen are electrically connected with the control unit, the ultraviolet radiation monitoring device is used for monitoring the radiation dose of ultraviolet rays radiated onto a sterilization surface in real time and transmitting the monitored radiation dose information to the control unit, the control unit obtains the sterilization rate from a database in which the relationship between the sterilization rate and the radiation dose is recorded, and the display screen is used for displaying the real-time sterilization rate in real time.
Preferably, the UVC radiation dose monitoring device includes a UVC sensor for monitoring UVC intensity radiated onto the germicidal surface in real time and transmitting the monitored UVC intensity information to the microcontroller, and the microcontroller calculates the UVC radiation dose in real time according to the UVC intensity information and time information, and is in communication connection with the control unit.
Preferably, UVC radiation dose monitoring devices still includes temperature and humidity sensor and PM2.5 detection module, temperature and humidity sensor with PM2.5 detection module all with microcontroller communication connection, temperature and humidity sensor is arranged in detecting the humidity and the temperature of waiting to disinfect the environment of object in the place, PM2.5 detection module is arranged in detecting the PM2.5 numerical value of waiting to disinfect the environment of object in the place air, microcontroller is right according to humidity information, temperature information and PM2.5 numerical information radiation dose.
Preferably, the device further comprises a shell, the UVC sensor, the control unit, the temperature and humidity sensor and the PM2.5 detection module are all arranged in the shell, a light hole is formed in the top of the shell, an air inlet and an air hole are formed in the shell on the side portion of the light hole, and the light hole, the air inlet and the air hole respectively correspond to the UVC sensor, the PM2.5 detection module and the temperature and humidity sensor;
the control unit is used for being in communication connection with the germicidal lamp, and the control unit controls the germicidal lamp to be turned off when the real-time germicidal rate reaches more than 99.99%.
Compared with the prior art, the invention achieves the following technical effects:
the detection method and the detection device for the UVC ultraviolet radiation sterilization effect can detect the sterilization rate of the sterilization lamp on the sterilization surface in real time, show the sterilization rate in real time and further guide a user to accurately use the sterilization lamp, so that the user can fully sterilize an object to be sterilized by using the UVLED sterilization lamp.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a graph of radiation dose as a function of time at varying degrees from a germicidal surface using a UVC germicidal lamp;
FIG. 2 is a table showing the relationship between the dose of ultraviolet radiation and the sterilization rate;
FIG. 3 is a graph showing the sterilization rate with time under the same illumination intensity;
fig. 4 is a flowchart of the first and second embodiments.
Fig. 5 is a schematic structural view of a device for detecting a sterilization effect of UVC ultraviolet radiation according to a second embodiment;
FIG. 6 is an exploded view of the device of FIG. 5;
fig. 7 is a schematic view of the structure in the other direction of fig. 5.
In the figure: the device comprises a shell 1, a display 2, a microcontroller 3, a Bluetooth module 4, a control unit 5, a battery 6, a charging connector 7, a PM2.5 detection module 8, a UVC sensor 9, a temperature and humidity sensor 10, a protective lens 11, buttons 12, a button control panel 13, a display screen installation panel 14, a line passing hole 15, a gasket 16, a charging hole 17, a PM2.5 detection module exhaust port 18, a PM2.5 detection module air inlet 19, a connecting pipe 20, a light hole 21, a vent hole 22, an air inlet 23 and an air outlet 24.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention aims to provide a detection method and a detection device for the sterilizing effect of UVC ultraviolet radiation, which are used for solving the problems in the prior art and facilitating users to use UVLED sterilizing lamps to perform full sterilization.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The embodiment provides a method for detecting a sterilizing effect of UVC ultraviolet radiation, which comprises the following steps:
step one, calculating the ultraviolet radiation dose radiated on the sterilization surface in real time;
step two, comparing the radiation dose with a database in which the relation between the sterilization rate and the radiation dose is recorded in real time to obtain the real-time sterilization rate; the data base comprises the relation data of the sterilization rate and the radiation dose of ultraviolet rays in UVC wave band to various germs such as escherichia coli, staphylococcus, salmonella, new coronavirus and the like, and the data can be subjected to preliminary tests or directly combined by adopting conventional test data in the field.
And step three, displaying the sterilization rate in real time.
The detection method of UVC ultraviolet radiation bactericidal effect that this embodiment provided can real-time detection bactericidal lamp to the bactericidal rate on the surface that disinfects to show the bactericidal rate in real time, and then guide the accurate use bactericidal lamp of user, so that the user uses the UVLED bactericidal lamp to treat the object that disinfects and fully disinfect.
Further, the radiation dose in the first step is calculated by the following formula:
in the formula (1), the reaction mixture is,
t is the radiation dose, T is the radiation time, I is the radiation intensity of the UVC ultraviolet rays emitted by the germicidal lamp at the germicidal surface, in mW/cm 2 。
Furthermore, the radiation intensity I at the sterilization surface is directly detected by adopting an ultraviolet UVC sensor,
the corresponding central wave band and bandwidth of the ultraviolet UVC sensor 9 are consistent with the wave spectrum of the UVC germicidal lamp, and the ultraviolet UVC sensor 9 immediately collects the ultraviolet radiation intensity after the UVC germicidal lamp is turned on. The ultraviolet UVC sensor 9 is positioned on the sterilization surface, and the ultraviolet radiation intensity acquired by the ultraviolet UVC sensor 9 is ensured to be consistent with the ultraviolet radiation intensity of the sterilization surface.
The change of the sterilization rate in the third step along with the time is displayed in real time through the chart, and the chart is convenient for a user to check the sterilization rate more intuitively.
Further, the method for detecting the sterilizing effect of the UVC ultraviolet radiation also comprises a fourth step, when the sterilizing rate reaches more than 99.99%, the control unit controls the sterilizing lamp to be turned off, and therefore closed-loop control of ultraviolet monitoring and sterilization is achieved. The ultraviolet germicidal lamp is usually used and needs to be automatically turned off after being sterilized at regular time or manually turned off. However, as the germicidal lamp is used along with the service life, the emitted UVC intensity of the germicidal lamp is correspondingly reduced, the timing sterilization cannot confirm whether the germicidal lamp is completely sterilized after the UVC light intensity is changed, if the germicidal lamp is set for too long time, the resource waste is generated, and the closed-loop control of the embodiment can ensure that the resource can be saved under the condition of complete sterilization.
Further, when the UVC sensor is not selected, and the power of the germicidal lamp is known, a formula is required to be used for calculation, and under the premise of standard air pressure and temperature, the ultraviolet light is continuously attenuated along with the extension of the propagation distance in the process of air propagation, wherein the attenuation sources mainly include: diffusion attenuation by gas molecules, scattering attenuation by airborne particles, attenuation by ultraviolet light absorbed by airborne particles, and attenuation by ultraviolet light absorbed by the gas itself. The above four factors act in combination in the process of ultraviolet energy transmission, resulting in attenuation of ultraviolet energy with propagation distance, whereby the radiation intensity at the germicidal surfaceICalculated using the following formula:
wherein,IUVC radiation intensity, Q power of the germicidal lamp, sigma ultraviolet attenuation coefficient and x distance between the germicidal surface and the germicidal lamp;
ideally, the ultraviolet attenuation coefficient σ is calculated by the following equation:
wherein,
and
in order to define the constant number,
the wavelength of ultraviolet rays in UVC wave band is in nm.
Further, when considering the polarization and polarization phenomena of the ultraviolet rays during transmission, the attenuation coefficient σ is calculated by the following formula:
the formula is a detailed description of sigma, wherein N is the refractive index of ultraviolet rays in air, N is the volume density of gas molecules, rho represents the polarization defect in the ultraviolet ray scattering process, and under the standard pressure and temperature, the polarization defect rho in the air is approximately equal to 0.04;
the scattering of ultraviolet light by suspended particles in air is calculated using the following formula:
wherein, a and B are respectively definition constants, because the components of suspended particles in air are very complex, the values of a and B are usually defined by a method of actually measuring empirical data, including the attenuation caused by ultraviolet absorption by gas, and the values thereof can be defined by an experimental way, and the method is the content in the prior art and is not repeated in the present invention.
By combining the description of the attenuation factors, during the propagation process of ultraviolet rays, the ultraviolet energy on the propagation path can be calculated according to the formula (1), and the ultraviolet intensity is calculated by a calculation unit built in the instrument, so that the ultraviolet dose can be described by the following formula:
further, considering the influence of the ambient temperature, the humidity and the value of pm2.5 on the sterilization rate, the influence of the ambient temperature, the humidity and the value of pm2.5 on the sterilization rate is equivalently converted into the influence on the radiation dose, and therefore, the corrected radiation dose is calculated by adopting the following formula:
in the formula:
1 is the corrected radiation dose, and k is the correction coefficient;
k = k1 k2 k3, k1 is the temperature calibration coefficient, k2 is the humidity calibration coefficient, k3 is the pm2.5 calibration coefficient;
when the actual temperature is collected to be higher than 30 ℃ or lower than 20 ℃, the ultraviolet radiation dose is reduced by 20%, namely k1=0.8, and when the actual temperature is collected to be not higher than 30 ℃ and not lower than 20 ℃, k1= 1;
when the relative humidity in the air is higher than 50%, the ultraviolet radiation dose is reduced by 33.3%, namely k2=0.667, when the relative humidity is higher than 70%, the ultraviolet radiation dose is reduced by 66.7%, namely k2=0.333, and when the relative humidity in the air is not higher than 50%, k2= 1; when PM2.5 is higher than 75ug/m 2 When the UV radiation dose is reduced by 30%, i.e. k3=0.7, when PM2.5 is not higher than 75ug/m 2 When k3= 1.
Example two
The embodiment provides a UVC ultraviolet radiation sterilization effect detection device, as shown in fig. 1 to 7, including: the ultraviolet radiation monitoring device is used for monitoring the radiation dose radiated onto the sterilization surface in real time and transmitting the monitored radiation dose information to the control unit 5, the control unit 5 obtains the sterilization rate from a database recording the relationship between the sterilization rate and the radiation dose, and the display screen 2 is used for displaying the sterilization rate in real time.
The detection device of UVC ultraviolet radiation bactericidal effect that this embodiment provided can real-time detection bactericidal lamp to the bactericidal rate on the surface that disinfects to show the bactericidal rate in real time, and then guide the accurate use bactericidal lamp of user, so that the user uses the UVLED bactericidal lamp to treat the object that disinfects and fully disinfect.
Further, the UVC radiation dose monitoring device includes a UVC sensor 9 and a microcontroller 3, the UVC sensor 9 is configured to monitor UVC intensity radiated onto the sterilization surface in real time, and transmit the monitored UVC intensity information to the microcontroller 3, the microcontroller 3 calculates UVC radiation dose in real time according to the UVC intensity information and the time information, the microcontroller 3 is in communication connection with the control unit 5, a calculation module is disposed in the microcontroller 3, and the calculation module calculates the radiation dose by using the following formula:
in the formula,
t is the radiation dose, T is the radiation time, I is the radiation intensity of the UVC ultraviolet rays emitted by the germicidal lamp at the germicidal surface, in mW/cm 2 。
Further, UVC radiation dose monitoring devices still includes temperature and humidity sensor 10 and PM2.5 detection module 8, temperature and humidity sensor 10 and PM2.5 detection module 8 all with microcontroller 3 communication connection, temperature and humidity sensor 10 is arranged in detecting the humidity and the temperature of the environment in which the object of waiting to disinfect is located, PM2.5 detection module 8 is arranged in detecting the PM2.5 numerical value of the environment in which the object of waiting to disinfect is located, microcontroller 3 corrects the radiation dose according to humidity information, temperature information and PM2.5 numerical information, consider the influence of ambient temperature, humidity and the value of PM2.5 to the sterilization rate, change the influence of the value of ambient temperature, humidity and PM2.5 to the sterilization rate equivalently to the influence of radiation dose, therefore, adopt the following formula to calculate the radiation dose after correcting:
in the formula:
1 is the corrected radiation dose, and k is the correction coefficient;
k = k1 k2 k3, k1 is the temperature calibration coefficient, k2 is the humidity calibration coefficient, k3 is the pm2.5 calibration coefficient;
when the actual temperature is collected to be higher than 30 ℃ or lower than 20 ℃, the ultraviolet radiation dose is reduced by 20%, namely k1=0.8, and when the actual temperature is collected to be not higher than 30 ℃ and not lower than 20 ℃, k1= 1;
when the relative humidity in the air is higher than 50%, the ultraviolet radiation dose is reduced by 33.3%, namely k2=0.667, when the relative humidity is higher than 70%, the ultraviolet radiation dose is reduced by 66.7%, namely k2=0.333, and when the relative humidity in the air is not higher than 50%, k2= 1; when PM2.5 is higher than 75ug/m 2 When the UV radiation dose is reduced by 30%, i.e. k3=0.7, when PM2.5 is not higher than 75ug/m 2 When k3= 1.
Further, the UVC ultraviolet radiation sterilization effect detection device further comprises a housing 1, wherein the UVC sensor 9, the control unit 5, the temperature and humidity sensor 10 and the PM2.5 detection module 8 are all arranged in the housing 1, a light hole 21 is formed in the top of the housing 1, an air inlet 23 and an air vent 22 are formed in the housing 1 on the side of the light hole 21, and the light hole 21, the air inlet 23 and the air vent 22 respectively correspond to the UVC sensor 9, the PM2.5 detection module 8 and the temperature and humidity sensor 10; air in the sterilization environment enters the shell 1 through the air holes 22 and is detected by the temperature and humidity sensor 10, and air in the sterilization environment enters the shell 1 through the air inlet 23 and is detected by the PM2.5 detection module 8;
the control unit 5 is used for being in communication connection with the germicidal lamp, and when the germicidal rate reaches more than 99.99%, the control unit 5 controls the germicidal lamp to be turned off, so that the closed-loop control of ultraviolet monitoring and sterilization is realized. The ultraviolet germicidal lamp is usually used and needs to be automatically turned off after being sterilized at regular time or manually turned off. However, as the germicidal lamp is used along with the service life, the emitted UVC intensity of the germicidal lamp is correspondingly reduced, the timing sterilization cannot confirm whether the germicidal lamp is completely sterilized after the UVC light intensity is changed, if the germicidal lamp is set for too long time, the resource waste is generated, and the closed-loop control of the embodiment can ensure that the resource can be saved under the condition of complete sterilization.
Furthermore, the bottom end of the shell 1 is in a plane shape, and the bottom end is fixedly provided with an annular gasket 16, so as to place the housing 1 on a flat support structure, one side of the housing 1 is also flat, a panel 14 is mounted for the display screen, the other surfaces are smooth spherical surfaces, the display screen 2 is fixedly arranged on the display screen mounting panel 14, and the outer side of the display screen mounting panel 14 is provided with a button 12, the inner side of the display screen mounting panel 14 is provided with a button control panel 13, the button control panel 13 is electrically connected with the control unit 5, the display screen mounting panel 14 is provided with a wire through hole 15, the circuit of the display screen 2 is connected with the control unit 5 through the wire through hole 15, the shell 1 is also provided with a charging hole 17, the battery 6 in the housing 1 is charged through the charging hole 17, the transparent protective lens 11 is arranged at the light hole 21, and the transparent hole 21 can be sealed by the protective lens 11.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (3)
1. A detection method for sterilizing effect of UVC ultraviolet radiation is characterized in that: the method comprises the following steps:
step one, calculating the ultraviolet radiation dose radiated to the sterilization surface in real time;
step two, comparing the radiation dose with a database in which the relation between the sterilization rate and the radiation dose is recorded in real time to obtain the real-time sterilization rate;
step three, displaying the real-time sterilization rate in real time;
the radiation dose is calculated using the following formula:
in the formula:
the unit is mW/cm for radiation dose 2 ；
T is the radiation time in s;
q is the power of the germicidal lamp, and the unit is mW;
x is the distance between the germicidal surface and the germicidal lamp in cm;
2. The method of claim 1 for detecting the germicidal effect of UVC ultraviolet radiation, wherein: the change of the real-time sterilization rate along with time in the third step is displayed in real time through a chart;
and step four, when the real-time sterilization rate reaches more than 99.99 percent, the control unit controls the sterilization lamp to be turned off.
3. The method of claim 1 for detecting the germicidal effect of UVC ultraviolet radiation, wherein: considering the influence of the values of the ambient temperature, the humidity and the pm2.5 on the real-time sterilization rate, the influence of the values of the ambient temperature, the humidity and the pm2.5 on the sterilization rate is equivalently converted into the influence on the radiation dose, so that the corrected radiation dose is calculated by adopting the following formula:
in the formula:
1 is the corrected radiation dose, and k is the correction coefficient;
k = k1 k2 k3, k1 is the temperature calibration coefficient, k2 is the humidity calibration coefficient, k3 is the pm2.5 calibration coefficient;
when the actual temperature is collected to be higher than 30 ℃ or lower than 20 ℃, the ultraviolet radiation dose is reduced by 20%, namely k1=0.8, and when the actual temperature is collected to be not higher than 30 ℃ and not lower than 20 ℃, k1= 1;
when the relative humidity in the air is higher than 50%, the ultraviolet radiation dose is reduced by 33.3%, namely k2=0.667, when the relative humidity is higher than 70%, the ultraviolet radiation dose is reduced by 66.7%, namely k2=0.333, and when the relative humidity in the air is not higher than 50%, k2= 1; when PM2.5 is higher than 75ug/m 2 When the UV radiation dose is reduced by 30%, i.e. k3=0.7, when PM2.5 is not higher than 75ug/m 2 When k3= 1.
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