CN113018471A - Ultraviolet virus inactivation system based on semiconductor device - Google Patents

Ultraviolet virus inactivation system based on semiconductor device Download PDF

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Publication number
CN113018471A
CN113018471A CN202110132271.2A CN202110132271A CN113018471A CN 113018471 A CN113018471 A CN 113018471A CN 202110132271 A CN202110132271 A CN 202110132271A CN 113018471 A CN113018471 A CN 113018471A
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China
Prior art keywords
ultraviolet
voltage
resistor
pulse signal
module
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Pending
Application number
CN202110132271.2A
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Chinese (zh)
Inventor
刘飞
丁伟
王文秀
程任翔
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Jinling Institute of Technology
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Jinling Institute of Technology
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Priority to CN202110132271.2A priority Critical patent/CN113018471A/en
Publication of CN113018471A publication Critical patent/CN113018471A/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2/00Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08Radiation
    • A61L2/10Ultraviolet radiation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2/00Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/24Apparatus using programmed or automatic operation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2/00Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/26Accessories or devices or components used for biocidal treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2202/00Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10Apparatus features
    • A61L2202/11Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS 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
    • A61L2202/00Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10Apparatus features
    • A61L2202/14Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

The invention relates to an ultraviolet virus inactivation system based on a semiconductor device.A ultraviolet light source comprises a driving circuit and an ultraviolet LED lamp for generating high-energy ultraviolet photons; the ultraviolet monitoring module is used for converting an optical signal scattered by ultraviolet photons into a voltage pulse signal and sampling the voltage pulse signal; amplifying the voltage pulse signal, comparing the voltage pulse signal with a threshold voltage, and outputting a square pulse signal; the control core is used for outputting multi-path levels to the ultraviolet light source and the ultraviolet monitoring module respectively, collecting square pulse signals output by the ultraviolet monitoring module, counting at the same time, and outputting a counting value to the display device for displaying; and the display and data processing module is used for displaying the count value input by the control core and processing the data into a value of the ultraviolet dose. The system can be used for sterilizing efficiently, detecting ultraviolet radiation scattered by the virus inactivation system outside a main light path, preventing human bodies from being damaged, being capable of being controlled remotely, and having high stability and long service life.

Description

Ultraviolet virus inactivation system based on semiconductor device
Technical Field
The invention relates to the technical field of semiconductor photoelectricity, in particular to an ultraviolet virus inactivation system based on a semiconductor device.
Background
The novel coronavirus belongs to beta genus coronavirus, is ultraviolet and heat sensitive, and can effectively inactivate virus at the temperature of 56 ℃ for 30 minutes in the presence of ether, 75% ethanol, chlorine-containing disinfectant, peroxyacetic acid, chloroform and other lipid solvents. Among the recommended virus inactivation methods, the ultraviolet disinfection technology has the advantages of high efficiency, no chemical agent residue, wide bactericidal spectrum, almost all known bacteria and viruses can be killed, the defect that certain influence is generated on the human body while the viruses are inactivated is overcome, and the ultraviolet disinfection is recommended only under the unmanned condition. In order to solve the above-mentioned contradiction and expand the application of the ultraviolet disinfection technology in virus prevention and control, a virus inactivation system with a monitoring device is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ultraviolet virus inactivation system based on a semiconductor device, wherein the ultraviolet virus inactivation system is a virus inactivation system which utilizes a UVC waveband LED with adjustable power as an emission source and a 4H-SiC APD as a monitoring device.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an ultraviolet virus inactivation system based on a semiconductor device is characterized in that: the system comprises an ultraviolet light source, an ultraviolet monitoring module, a control core and a display and data processing module;
the ultraviolet light source comprises a driving circuit and an ultraviolet LED lamp for generating high-energy ultraviolet photons;
the ultraviolet monitoring module is used for converting an optical signal scattered by ultraviolet photons into a voltage pulse signal and sampling the voltage pulse signal; amplifying the voltage pulse signal, comparing the voltage pulse signal with a threshold voltage, and outputting a square pulse signal;
the control core is used for outputting multi-path levels to the ultraviolet light source and the ultraviolet monitoring module respectively, collecting square pulse signals output by the ultraviolet monitoring module, counting at the same time, and outputting a counting value to the display device for displaying;
and the display and data processing module is used for displaying the count value input by the control core and processing the data into a value of the ultraviolet dose.
The ultraviolet light source further comprises an adjusting resistor R3, the anode of the ultraviolet LED lamp is connected with an external power supply through a driving circuit, the cathode of the ultraviolet LED lamp is connected with one end of the adjusting resistor R3, and the other end of the adjusting resistor R3 is grounded.
The ultraviolet monitoring module comprises an avalanche photodiode APD, a sampling resistor RS, a quenching resistor RL, a filter capacitor C1, an adjustable high-voltage power supply, an operational amplifier and a comparator;
the N pole of the avalanche photodiode APD is connected with one end of a quenching resistor RL, the other end of the quenching resistor RL is connected with the output end of an adjustable high-voltage power supply, the other end of the quenching resistor RL is connected with the anode of a filter capacitor C1, and the cathode of the filter capacitor C1 is grounded;
the adjustable high-voltage power supply is connected with the control core in a control way, and the power supply input end of the adjustable high-voltage power supply is connected with an external power supply;
the P pole of the avalanche photodiode APD is connected with one end of a sampling resistor RS, the other end of the sampling resistor RS is grounded, the P pole of the avalanche photodiode APD is connected with the non-inverting input end of an operational amplifier, the inverting input end of the operational amplifier is connected with a resistor R1 and a resistor R2 in parallel, the other end of a resistor R1 is connected with the sampling resistor RS in series, the other end of the resistor R2 is connected with the output end of the operational amplifier, the output end of the operational amplifier is connected with the non-inverting input end of a comparator, the non-inverting input end of the comparator is connected with a control core, and the inverting input end of the comparator is; the output end of the comparator is connected with the control core signal.
The control core comprises a data processing module, a WIFI signal module and a multi-path voltage output module, the multi-path voltage output module is used for providing control voltage for the adjustable high-voltage power supply, and the multi-path voltage output module is also used for providing threshold voltage for the inverting input end of the comparator; the data processing module is used for receiving a voltage pulse signal at the output end of the comparator, the data processing module is in signal connection with the WIFI signal module, and the WIFI signal module is in wireless signal connection with the display and data processing module.
The display and data processing module includes but is not limited to a computer, a mobile phone and a tablet computer.
The ultraviolet LED lamp adopts an ultraviolet lamp with the wavelength of 254 nm.
The comparator is of an AD86111 model, and the operational amplifier is of an OPA354 model.
The ultraviolet virus inactivation system based on the semiconductor device has the following beneficial effects: firstly, the ultraviolet LED light source is utilized, the sterilization efficiency is high, and no chemical residue exists. And secondly, the ultraviolet radiation of the virus inactivation system is detected by using an ultraviolet sensor, the ultraviolet radiation is safer than that of the traditional ultraviolet inactivation system, and the weak ultraviolet radiation scattered by the virus inactivation system can be detected outside a main light path by using an avalanche effect and a photon counting mode. Thirdly, the quenching resistor is adopted to limit the current, so that the stability and the service life of the system are improved. Fourthly, the multifunctional control core controls the ultraviolet virus inactivation system to work, so that remote control can be realized, and the close-range contact of the human body with ultraviolet radiation can be avoided.
Drawings
Fig. 1 is a block diagram of an ultraviolet virus inactivation system based on a semiconductor device according to the present invention.
Fig. 2 is a schematic diagram of a hardware circuit of an ultraviolet virus inactivation system based on a semiconductor device according to the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments.
An ultraviolet virus inactivation system based on a semiconductor device is characterized in that: the system comprises an ultraviolet light source, an ultraviolet monitoring module, a control core and a display and data processing module;
the ultraviolet light source comprises a driving circuit and an ultraviolet LED lamp for generating high-energy ultraviolet photons;
the ultraviolet monitoring module is used for converting an optical signal scattered by ultraviolet photons into a voltage pulse signal and sampling the voltage pulse signal; amplifying the voltage pulse signal, comparing the voltage pulse signal with a threshold voltage, and outputting a square pulse signal;
the control core is used for outputting multi-path levels to the ultraviolet light source and the ultraviolet monitoring module respectively, collecting square pulse signals output by the ultraviolet monitoring module, counting at the same time, and outputting a counting value to the display device for displaying;
and the display and data processing module is used for displaying the count value input by the control core and processing the data into a value of the ultraviolet dose.
In this embodiment, the ultraviolet light source further includes a regulating resistor R3, the positive pole of the ultraviolet LED lamp is connected to the external power source through the driving circuit, the negative pole of the ultraviolet LED lamp is connected to one end of the regulating resistor R3, and the other end of the regulating resistor R3 is grounded.
In this embodiment, the ultraviolet monitoring module includes an avalanche photodiode APD, a sampling resistor RS, a quenching resistor RL, a filter capacitor C1, an adjustable high-voltage power supply, an operational amplifier, and a comparator;
the N pole of the avalanche photodiode APD is connected with one end of a quenching resistor RL, the other end of the quenching resistor RL is connected with the output end of an adjustable high-voltage power supply, the other end of the quenching resistor RL is connected with the anode of a filter capacitor C1, and the cathode of the filter capacitor C1 is grounded;
the adjustable high-voltage power supply is connected with the control core in a control way, and the power supply input end of the adjustable high-voltage power supply is connected with an external power supply;
the P pole of the avalanche photodiode APD is connected with one end of a sampling resistor RS, the other end of the sampling resistor RS is grounded, the P pole of the avalanche photodiode APD is connected with the non-inverting input end of an operational amplifier, the inverting input end of the operational amplifier is connected with a resistor R1 and a resistor R2 in parallel, the other end of a resistor R1 is connected with the sampling resistor RS in series, the other end of the resistor R2 is connected with the output end of the operational amplifier, the output end of the operational amplifier is connected with the non-inverting input end of a comparator, the non-inverting input end of the comparator is connected with a control core, and the inverting input end of the comparator is; the output end of the comparator is connected with the control core signal.
In this embodiment, the control core includes a data processing module, a WIFI signal module, and a multi-path voltage output module, where the multi-path voltage output module is configured to provide a control voltage for the adjustable high-voltage power supply, the multi-path voltage output module is further configured to provide a threshold voltage for an inverting input terminal of the comparator, the multi-path voltage output module is further configured to provide a working voltage for a driving circuit of the ultraviolet LED lamp, and the working voltage of the ultraviolet LED lamp is also used as the control voltage; the multi-path voltage output module respectively provides voltage for the comparator and the adjustable high-voltage power supply through the voltage follower; the data processing module is used for receiving a voltage pulse signal at the output end of the comparator, a counter is arranged in the data processing module and used for counting voltage pulses, the data processing module is in signal connection with the WIFI signal module, and the WIFI signal module is in wireless signal connection with the display and data processing module.
In this embodiment, the display and data processing module includes, but is not limited to, a computer, a mobile phone, and a tablet computer.
In this embodiment, the preferred multi-function control core is myRIO model 1900, manufactured by national instruments of America.
Furthermore, in the ultraviolet light source, the multi-path voltage output module provides 0-5V voltage for the ultraviolet LED lamp, and drives the LED to emit ultraviolet radiation with different powers to inactivate viruses. The adjusting resistor R3 is connected in series with the LED to adjust the power outside the control core and prevent the LED from being damaged due to excessive current. The ultraviolet LED lamp adopts an ultraviolet lamp with the wavelength of 254nm, and the adjusting resistance R3 can be adjusted between 1 kiloohm and 10 kiloohm.
Furthermore, in the ultraviolet monitoring module, the avalanche photodiode APD works in a Geiger mode, the output end of the adjustable high-voltage power supply outputs proper driving voltage to drive the avalanche photodiode APD to work, when ultraviolet photons generated by the ultraviolet LED lamp are incident to the avalanche photodiode APD, avalanche current is generated to enable the avalanche photodiode to be broken down, the acquisition resistor extracts a standard voltage pulse signal and inputs the voltage pulse signal into the operational amplifier, and meanwhile, the quenching resistor timely quenches the avalanche current to enable the avalanche photodiode to be reset to an initial state and enter a new round of state to be detected; the amplifier circuit adopts 10 times amplification factor to amplify the voltage signal to a voltage level so as to facilitate the work of the comparator, the amplifier adopts a negative feedback amplifier circuit, the amplified voltage pulse signal is compared with a threshold voltage through the comparator, and when the amplitude of the voltage pulse signal is greater than the threshold voltage, a square pulse signal with the amplitude of 5V is output;
the adjustable high-voltage power supply is provided with five pins, wherein the output end of the adjustable high-voltage power supply is connected with a quenching resistor and a capacitor C1, the power supply end of the adjustable high-voltage power supply is connected with a 12V input voltage, the voltage adjusting end of the adjustable high-voltage power supply is connected with the multi-path voltage output module through a voltage follower, and the GND end of the adjustable high-voltage power supply is connected with the capacitor and the sampling resistor and is grounded.
The amplifying circuit amplifies the voltage pulse signal by 10 times, then the voltage pulse signal is input to the in-phase input end of the comparator to be compared with a preset threshold voltage, and when the level of the voltage pulse signal is greater than the threshold voltage, the comparator outputs a square pulse signal of 5V; in this embodiment, the resistances of the resistor RL, the resistor RS, the resistor R1, and the resistor R2 are 10 kilo-ohms, 1 kilo-ohms, and 9 kilo-ohms, respectively, the preamplifier is of an OPA354 type, the comparator is of an AD86111 type, and the DAC2 output by the two-way digital-to-analog converter is used as the threshold voltage. In the embodiment, the multi-path digital-to-analog converter respectively outputs two paths of level DAC1 and DAC2, wherein DAC1 is connected with the voltage regulation end through the voltage follower, DAC1 is 0-3.3V, and the output end proportionally outputs 0-200V high voltage. The voltage value of DAC2 is 0-3.3V, a typical value is 1V.
Furthermore, the timing period of a timer in the data processing module is 1S, the counter collects and stores the square pulse signal output by the comparison circuit, the square pulse signal is output and displayed on the display device according to the period of the timer, and then the detection of the next period is started by zero clearing.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims (7)

1. An ultraviolet virus inactivation system based on a semiconductor device is characterized in that: the system comprises an ultraviolet light source, an ultraviolet monitoring module, a control core and a display and data processing module;
the ultraviolet light source comprises a driving circuit and an ultraviolet LED lamp for generating high-energy ultraviolet photons;
the ultraviolet monitoring module is used for converting an optical signal scattered by ultraviolet photons into a voltage pulse signal and sampling the voltage pulse signal; amplifying the voltage pulse signal, comparing the voltage pulse signal with a threshold voltage, and outputting a square pulse signal;
the control core is used for outputting multi-path levels to the ultraviolet light source and the ultraviolet monitoring module respectively, collecting square pulse signals output by the ultraviolet monitoring module, counting at the same time, and outputting a counting value to the display device for displaying;
and the display and data processing module is used for displaying the count value input by the control core and processing the data into a value of the ultraviolet dose.
2. The semiconductor device-based ultraviolet virus inactivation system of claim 1, wherein: the ultraviolet light source further comprises an adjusting resistor R3, the anode of the ultraviolet LED lamp is connected with an external power supply through a driving circuit, the cathode of the ultraviolet LED lamp is connected with one end of the adjusting resistor R3, and the other end of the adjusting resistor R3 is grounded.
3. The semiconductor device-based ultraviolet virus inactivation system of claim 2, wherein: the ultraviolet monitoring module comprises an avalanche photodiode APD, a sampling resistor RS, a quenching resistor RL, a filter capacitor C1, an adjustable high-voltage power supply, an operational amplifier and a comparator;
the N pole of the avalanche photodiode APD is connected with one end of a quenching resistor RL, the other end of the quenching resistor RL is connected with the output end of an adjustable high-voltage power supply, the other end of the quenching resistor RL is connected with the anode of a filter capacitor C1, and the cathode of the filter capacitor C1 is grounded;
the adjustable high-voltage power supply is connected with the control core in a control way, and the power supply input end of the adjustable high-voltage power supply is connected with an external power supply;
the P pole of the avalanche photodiode APD is connected with one end of a sampling resistor RS, the other end of the sampling resistor RS is grounded, the P pole of the avalanche photodiode APD is connected with the non-inverting input end of an operational amplifier, the inverting input end of the operational amplifier is connected with a resistor R1 and a resistor R2 in parallel, the other end of a resistor R1 is connected with the sampling resistor RS in series, the other end of the resistor R2 is connected with the output end of the operational amplifier, the output end of the operational amplifier is connected with the non-inverting input end of a comparator, the non-inverting input end of the comparator is connected with a control core, and the inverting input end of the comparator; the output end of the comparator is connected with the control core signal.
4. The semiconductor device-based ultraviolet virus inactivation system of claim 3, wherein: the control core comprises a data processing module, a WIFI signal module and a multi-path voltage output module, the multi-path voltage output module is used for providing control voltage for the adjustable high-voltage power supply, and the multi-path voltage output module is also used for providing threshold voltage for the inverting input end of the comparator; the data processing module is used for receiving a voltage pulse signal at the output end of the comparator, the data processing module is in signal connection with the WIFI signal module, and the WIFI signal module is in wireless signal connection with the display and data processing module.
5. The semiconductor device-based ultraviolet virus inactivation system of claim 4, wherein: the display and data processing module includes but is not limited to a computer, a mobile phone and a tablet computer.
6. The semiconductor device-based ultraviolet virus inactivation system of claim 2, wherein: the ultraviolet LED lamp adopts an ultraviolet lamp with the wavelength of 254 nm.
7. The semiconductor device-based ultraviolet virus inactivation system of claim 3, wherein: the comparator is of an AD86111 model, and the operational amplifier is of an OPA354 model.
CN202110132271.2A 2021-01-31 2021-01-31 Ultraviolet virus inactivation system based on semiconductor device Pending CN113018471A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323109A (en) * 2013-06-21 2013-09-25 中国科学院上海技术物理研究所 Light intensity detecting system for mobile phone sterilizer ultraviolet lamp tube
CN210112350U (en) * 2019-04-16 2020-02-21 河南中医药大学 Ultraviolet lamp intensity adjusting device for ward
CN211954421U (en) * 2020-04-29 2020-11-17 金陵科技学院 Portable ultraviolet photon counting system based on avalanche device
CN111956821A (en) * 2020-07-15 2020-11-20 浙江阳光照明电器集团股份有限公司 Ultraviolet germicidal lamp sterilization method and circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323109A (en) * 2013-06-21 2013-09-25 中国科学院上海技术物理研究所 Light intensity detecting system for mobile phone sterilizer ultraviolet lamp tube
CN210112350U (en) * 2019-04-16 2020-02-21 河南中医药大学 Ultraviolet lamp intensity adjusting device for ward
CN211954421U (en) * 2020-04-29 2020-11-17 金陵科技学院 Portable ultraviolet photon counting system based on avalanche device
CN111956821A (en) * 2020-07-15 2020-11-20 浙江阳光照明电器集团股份有限公司 Ultraviolet germicidal lamp sterilization method and circuit

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Application publication date: 20210625