WO2015116876A1 - Dispositif et procédé de désinfection aux ultraviolets - Google Patents

Dispositif et procédé de désinfection aux ultraviolets Download PDF

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Publication number
WO2015116876A1
WO2015116876A1 PCT/US2015/013627 US2015013627W WO2015116876A1 WO 2015116876 A1 WO2015116876 A1 WO 2015116876A1 US 2015013627 W US2015013627 W US 2015013627W WO 2015116876 A1 WO2015116876 A1 WO 2015116876A1
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WO
WIPO (PCT)
Prior art keywords
uvc
location
disinfected
ultraviolet disinfection
mobile
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PCT/US2015/013627
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English (en)
Inventor
Todd A. PRINGLE
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Twilight Labs, Inc.
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Publication of WO2015116876A1 publication Critical patent/WO2015116876A1/fr

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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
    • 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
    • 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
    • A61L2202/16—Mobile applications, e.g. portable devices, trailers, devices mounted on vehicles

Definitions

  • the present invention relates generally to the disinfection of an enclosed space using a mobile device emitting ultraviolet light, including ultraviolet-C (UVC), more particularly, a mobile UVC device utilizing measurement and simulation.
  • UVC ultraviolet-C
  • U.S. Patent 8,841,634 teaches an Ultraviolet Germicidal Irradiation (UVGI) disinfection process utilizing a ring of cylinder shaped housings containing UVC lamps.
  • UVGI Ultraviolet Germicidal Irradiation
  • U.S. Patent 8,841,634 also teaches a configurable UVC emission field by increasing or decreasing individual lamps based on information from corresponding UVC radiometric sensors.
  • U.S. Patents 6,656,424 and 6,911,177 teach a plurality of vertical UVC lamps in a ring with a plurality of UVC radiometric sensors on the top of the lamp assembly. The device continues to power all lamps until all of the sensors have received a desired amount of only reflected UVC light.
  • U.S. Patent 8,816,301 teaches a ring of slanted lamps with and without reflectors, and a mechanism to move lamps and reflectors in order to focus UVC within a vertical band.
  • U.S. Patent 8,105,532 teaches a UVC light sterilizing wand utilizing a distance sensor to calculate accumulated direct UVC light irradiance, including an indicator to the user when said accumulated irradiance, or dosage of UVC light, has been achieved.
  • U.S. Patent 7,459,694 teaches non-vertical (slanted) ring of UVC lamps in a cone configuration.
  • a device and method to UVC disinfect an interior room comprising matching measureable parameters of the room to simulations of sufficiently similar rooms, and adjusting the device until desired targeted surfaces in the room have achieved a predicted UVC disinfecting dose.
  • a problem to be solved includes achieving a desired accumulated UVC irradiance, corresponding to a predicted UVC surfaces disinfection dose, on target surfaces in interior rooms, where UVC radiometric sensors are not present on all target surfaces, and where a portion of said surfaces are not in direct "line of sight" light of the UVC device.
  • Common previous approaches typically rely on direct light calculations for determination of predicted UVC dosage, which does not account for the UVC irradiance accumulating on indirect surfaces.
  • Sensor-based approaches have been used to determine distance for direct light UVC irradiance calculations.
  • the distance information is used to determine the length of time that the UVC lamps need to remain powered on and illuminating the directly lit surfaces at the measured distance, or to adjust the amount of UVC intensity from the lamps that illuminate the specific area that was measured for a given illumination time.
  • Other approaches measure the accumulated UVC irradiance, and therefore a predicted UVC disinfection dosage, on UVC radiometric sensors on the device or located within the enclosed space.
  • the UVC radiometric sensors measure UVC irradiance incident on the sensor's photodiode and the UVC lamps maintain illumination until all sensors have accumulated a UVC irradiance corresponding to a predicted UVC disinfection dosage.
  • the first sensor-based approach, incorporating distance, nor the second sensor-based approach, incorporating UVC radiometric sensors determines the UVC irradiance, or the predicted UVC disinfection dosage, on indirectly lit surfaces where sensors are not present. Furthermore, the first sensor-based approach, measuring distance, does not account for reduced UVC irradiance caused by objects just out of the sensing range of the distance sensor that occlude at least part of the emissive area of the UVC lamps, such as a bed in a hospital room which can block some of the UVC light from the surfaces where the distance sensor measured.
  • the present subject matter can provide a solution to this problem, such as by providing a mobile UVC device which measures and calculates room dimensions and the level of UVC light coming from the device and reflecting from the surfaces of the room, and which uses information from computer simulations of interior rooms, with dimensions and occluding objects consistent with the interior room under UVC illumination, to adjust controllable functions in order to achieve a desired accumulated UVC irradiance, corresponding to a predicted UVC surface disinfection dose, on any target surface in an interior room.
  • a problem to be solved includes achieving a desired accumulated UVC irradiance, corresponding to a predicted UVC surface disinfection dose, on target surfaces in interior rooms, where UVC radiometric sensors are not present on all target surfaces, and where a portion of said surfaces are not in direct "line of sight" light of a mobile UVC device or devices, and where said interior rooms can be of varying dimensions and/or may have varying levels of UVC reflectivity on surfaces and/or varying objects in the rooms in varying locations.
  • This problem can be further complicated by the fact that the UVC device or devices may be placed in multiple locations in each interior room, or that it may be unpredictable as to which room a UVC device needs to disinfect and in what order.
  • the present subject matter can provide a solution to this problem, such as by providing a UVC device, a means of measuring and calculating room dimensions, device locations, and the level of UVC light coming from the device and reflecting from the surfaces of the room, and using information from computer simulations of similar parameters to what was measured to adjust the device's controllable functions in order to achieve a desired accumulated UVC irradiance, corresponding to a predicted UVC surface disinfection dose, on any target surface in an interior room.
  • Figure 1 shows an embodiment with one distance sensor and one UVC light sensor.
  • Figure 2 shows another embodiment with multiple distance sensors and multiple UVC sensors.
  • look-up table can include a tabular listing of data or it can mean a general logic or algorithm to compare one set of parameters to another to find the closest match, or it can mean any process within a functional method or software program or manual method to find data which matches, substantially matches, or is the closest match of a group, or which matches within set tolerance limits, of a set of criteria or other values.
  • interior room can include hospital patient, operating, or exam rooms, or hotel rooms, or cruise ship rooms, or rooms inside houses or apartments, or school rooms, or rooms within offices building, or interior spaces within a factory, or interior spaces in public buildings, or any space containing complex surfaces and objects.
  • the term “substantially” as used herein refers to a majority of, or mostly, as in at least about 50%, 60%, 70%, 80%, 90%, 95%, 96%, 97%, 98%, 99%, 99.5%, 99.9%, 99.99%, or at least about 99.999%) or more.
  • the term “multiple” refers to two or more (e.g., 2, 3, 4, 5, 6, etc.)
  • the term “ultraviolet light” refers to electromagnetic radiation with a wavelength shorter than human- visible light, such as about 10 nm to about 400 nm.
  • UVC ultraviolet C, short-wave ultraviolet, FAR-UV, deep UV
  • GMC ultraviolet C, short-wave ultraviolet, FAR-UV, deep UV
  • UVC includes, UV light lying between the wavelengths of about 200 and about 300 nm, commonly referred to as the "germicidal region" because UV light in this region can inactivate
  • microorganisms including, but not limited to, bacteria, protozoa, viruses, molds, yeasts, fungi, nematode eggs, or algae.
  • An especially destructive wavelength of UV light is about 260 nm.
  • Germicidal UV lamps typically emit light with a wavelength that is substantially close to 260 nm for its destructive purposes, such as around typically around 254 nm.
  • absorbing refers to the process by which a photon is prevented from transmitting through, refracting, or reflecting from a material.
  • human-visible refers to optical properties of an object or process that occurs within the range of human vision, typically from about 400 to about 700 nanometers in wavelength.
  • transparent refers to a photon traveling through a material without being absorbed.
  • the term "light” refers to any form of electromagnetic radiation.
  • specular reflection refers to mirror-like reflection of light from a surface, in which light from a single incoming direction is reflected into a single outgoing direction.
  • light scattering refers to reflection of light from a surface or sub-surface such that an incident ray is reflected or scattered at unpredictable angles.
  • the term “location” may refer to a specific place targeted for UVC disinfection, such as a hospital room, an office, or a similar volume of space, or “location” may be used to refer to a geographic location relative to a frame of reference.
  • location to be disinfected refers to a volume of space such as a hospital room
  • the location of the device refers to the device's specific geographic placement within a frame of reference, such as its placement inside a hospital room.
  • Figure 1 shows an embodiment of the invention comprising a mobile UVC device with a UVC lamp assembly 10, mounted on a mobile base 20, with a distance measuring sensor 30, a UVC light sensor 40, a sensor module assembly 50 and a top base 60.
  • the sensor module 50 is attached to the top base 60 via a pivoting assembly allowing the sensor module 50 to rotate around the top base 60.
  • the room is measured at multiple points by the distance measuring sensor 30, enabling a
  • the UVC light sensor 40 in this embodiment, is configured to aggregate the UVC light incident upon the sensor such that sensor's field of view is 360 degrees around the horizontal, and optionally includes the ceiling, and optionally includes direct exposure to the lamps.
  • the output of the UVC light sensor 40 is directed to the microprocessor within the device to determine an aggregate level of UVC light coming from the device and from the surfaces in the room.
  • the program running on the microprocessor compares the calculated room dimensions, device location, and aggregate UVC light, against a look-up table of simulations of rooms of varying dimensions, UVC device locations, number of UVC devices, objects in the rooms, orientations and location of objects in the room, and levels of aggregate UVC light intensity coming from the device and reflected from room surfaces, to find the best match.
  • the program compares the user input commanding such things as the level of predicted UVC disinfection desired and optionally for how many surfaces of the room are desired to reach a predicted UVC dose, against the stored results of the simulation showing multiple surfaces and their level of UVC irradiance for each surface for those simulation conditions.
  • the computer adjusts controllable parameters on the device, such as the time duration that the UVC lamps are powered on or the intensity of the lamps until the desired amount, number, or percent of surfaces, or specific target surfaces, in the simulation have achieved the desired predicted UVC disinfection.
  • FIG. 2 shows an embodiment of the invention comprising a mobile UVC device with a UVC lamp assembly 10, mounted on a mobile base 20, with multiple distance measuring sensors 30, multiple UVC light sensors 40, a sensor module assembly 50, a top base 60, and optional distance or UVC light sensors on the mobile base 70.
  • the sensor module 50 is attached to the top base 60 via a pivoting assembly allowing the sensor module 50 to rotate around the top base 60. Because there are multiple distance measuring sensors 30, the sensor module 50 need only rotate such that all 360 degrees on the horizontal has received a distance measurement. In an embodiment with 2 distance measuring sensors 30 as shown in Figure 2, the sensor module 50 would rotate 180 degrees. In another embodiment with four equally spaced distance measuring sensors 30 the sensor module 50 would only need to rotate 90 degrees.
  • the number of distance measurement sensor can be high enough, as an example 4,5,6,7, 8,9,10 or more distance measuring sensors, that the sensor module 50 need not rotate and the sensor module 50 and the top base 60 need not have a swivel mechanism nor be separate assemblies.
  • the UVC light sensors 40 are shown mounted to the top base 60 to illustrate an embodiment where the UVC light sensors may be selected with a sufficient wide field of view such that it is not necessary to mount them on the rotating sensor module 50.
  • sensors 70 can be mounted on the mobile base 20 or anywhere suitable on the device.
  • Distance measuring sensors 30 can also be mounted vertically for applications where ceiling height may vary.
  • the mobile base 20 can contain a means to maneuver the UVC device such as wheels or tracks or other means.
  • the mobile base 20 can be sufficiently wide and heavy to reduce the danger of tipping the UVC device.
  • the mobile base 20 can contain the lamp drivers and other circuitry or modules such as safety interlocks, microprocessors, wireless communication, breakers, power supplies, and other things necessary for function and safety.
  • the mobile base 20 of the UVC device could be enabled to self- propel the UVC device.
  • the UVC lamps could remain powered as the device moves about the room, increasing UVC disinfection while reducing the time needed to disinfect.
  • the UVC device can move itself from location to location, as well as from room to room, including, optionally, moving itself to charging stations.
  • the UVC device can be an aerial drone.
  • the lamp assembly 10 can be comprised of, as an example, of a ring of low pressure "amalgam" high output mercury tube lamps.
  • the lamp assembly can be comprised of a support form or reflector assembly mounted to or adjacent the lamps.
  • Other sources of UVC lighting such as LEDs, flash tubes, or any sources of UVC can be implemented within the scope of the invention.
  • Any number of UVC lamps, or any number or type of distance measuring or UVC light sensing, can be employed in various embodiments of the invention. Any number of combinations, or locations, or types of UVC emission sources can be incorporated and still fit the definition of the invention.
  • the distance measuring sensor 30 may be any appropriate technology for determining the distance to and/or the three-dimensional (3D) structure of an object, including but not limited to laser rangefmders, ultrasonic sensors, RADAR, LIDAR, time of flight or phase shift of light, 3D scanning systems, or any sensor or sensor system capable of measure distance or determining the 3D structure of distant objects.
  • the distance sensor 30 can consist of a time of flight laser rangefmder commonly used in robotics, shooting sports, and remote drones.
  • the distance sensor 30 can consist of a 3D scanning sensor commonly used to scan detailed dimensions and forms of objects for 3D modeling.
  • the detailed distance information can be used to create a detailed 3D model of the room, optionally including the UVC light data from the UVC light sensor 40, to more accurately find a match to the corresponding simulation data, or, in a another further embodiment, the 3D scanning distance sensors 30 could be used to create a detailed 3D model of the room to run a new simulation either on the microprocessor or microprocessors within the device or on an external computer via a data connection, such as a Wi-Fi connection to a cloud computer, and, in this embodiment, the new simulation's output is used to provide a new match for the look-up table, thus increasing the flexibility of the device and accuracy of the outcome.
  • a data connection such as a Wi-Fi connection to a cloud computer
  • the 3D scanners can be used to recognize objects within the room, such as chairs and hospitals beds, and subsequently incorporate these objects as clean 3D models free from scanner artifacts.
  • the UVC light sensor 40 may be a simple photodiode with normal cosign law sensitivity to its surface.
  • the UVC light sensor 40 is a vertically-oriented photodiode assembly such that incident UVC light strikes an upside down cone diffuser and is directed into the photodiode, enabling 360 degree sensing.
  • the diffuser is a quartz tube.
  • the UVC light sensor 40 consists of multiple photodiodes of varying orientation within a sensor assembly.
  • a quartz optic fiber can transport light from the lamp assembly 10 to a UVC light sensor 40 to enable measurement of UVC light output from the device and optionally to verify that one, some, or all of the lamps are properly lit.
  • UVC imaging sensors can be used to determine the UVC reflective characteristics of the surfaces in the room.
  • UVC imaging can be combined with 3D scanning to produce a 3D model with UVC reflective characteristics built into the model to produce more accurate UVC irradiance predictions for the modeled surfaces corresponding the surfaces in the match of the look-up table. [0039] Any number of combinations, or locations, or types of sensors can be incorporated and still fit the definition of the invention.
  • Measurements of distance and room dimensions, and measurement of UVC reflectivity of surfaces can be performed by many means. Measurements can be performed by a user or operator or other person prior to placement of the UVC device in the room. Measurement of UVC reflectivity can be performed indirectly such as from information from the manufacturers of the wall or ceiling coatings, or from reference materials.
  • the measurement data can be entered into the UVC device microprocessor via a user interface, or the measurement data can be used to find a simulation match in a written document or software application on a computer or handheld device that serves the function of the look-up table. Look-up table
  • the look-up table is at least partially derived from detailed distance or radiometric sensor measurements of room configurations. It should be apparent that computer simulation is just one means to derive the data needed for the look-up table. While computer simulations generally have benefits over extensive manual measurements or at least partially manual predictive calculations, there can be special applications where radiometrics, manual distance measurements, or manual calculation can derive date for the look-up table.
  • the UVC light sensor 40 is not used or is not present. In this embodiment the UVC reflectivity of the surfaces of the room are sufficiently known such that the look-up table does not include UVC light sensor parameters, or is sufficiently truncated to already have a set amount of UVC light sensor measurement pre-selected in the look-up table.
  • An example of this embodiment can be where the user input to the device indicates a certain level of UVC reflection in the room to be disinfected.
  • the means of determining the level of UVC that will reflect or scatter around the room is already sufficiently determined such that the device or the user does not need to measure it.
  • sufficient extra power or time can be added to the disinfection program such that the extra time or UVC light intensity is sufficient for the lowest possible level of UVC reflectivity in a room to be disinfected.
  • the distance measuring sensor 30 is not used or is not present.
  • the room dimensions and optionally the location of the UVC device in the room is sufficiently known such that the look-up table does not include distance measuring sensor parameters, or is sufficiently truncated to already have the room dimensions or device locations pre-selected in the look-up table.
  • An example of this embodiment can be where the user input to the device indicates certain dimensions of the room and, optionally, the location, or locations, of the device, or devices, in the room.
  • the dimensions and locations are sufficiently determined such that the device does not need to measure or calculate it.
  • sufficient extra power or time can be added to the disinfection program such that the extra time or UVC light intensity is sufficient for the largest probable room dimension or the least advantageous device location or combinations thereof.
  • the user selects from a menu of room configurations, such as bed locations or chair locations that could be configured with a room of the measured dimensions.
  • the measuring of the room dimensions, the location of the device, and the UVC light reflectivity of the surfaces of the room are predetermined.
  • the user can select the match on the look-up table manually using an interface, or the user can manually adjust the UVC device to change the output of one or more UVC lamps, or to position the device in particular location in the room, or to adjust the amount of time that the UVC lamps will remain powered on based on information at least partially provided by simulation of the room.
  • the simulations involve more than simple direct line of sight light calculations.
  • the information derived from the simulations can take many forms.
  • the information can be, as an example, a table or listing of data which contains device run times, indicating how long the UVC lights should stay powered on, corresponding to particular room dimensions, or a range of room dimensions, or device locations, or UVC reflectivity of the wall coatings.
  • the information within the look-up table at least partially derived from simulation could take the form, as an example, of written guidelines, either printed or in electronic form that a user consults when operating the UVC device.
  • the user serves to connect the information derived at least partially from simulations to the operation of the device.
  • An electronic form can include a menu system on a computer which can control or send commands to the UVC device.
  • the UVC device need not contain a
  • the room dimensions, the location of the device in the room, the objects in the room, the UVC reflectivity of the room is sufficiently known and the information at least partially derived from simulation is sufficiently matched to the details of the room that the user can control the UVC lights, in accordance to the information and the teachings of the invention, to achieve at least a targeted UVC irradiance, corresponding to a predicted UVC disinfection dose, on targeted surfaces in the room, including surfaces not in un-occluded direct light and not on surfaces containing UVC light sensors or other UVC intensity indicators, such as photochemical sensors.
  • the simulations of various room dimensions, device locations, multiple device locations and/or multiple devices within the same disinfection cycle, UVC reflectivity variations on room surfaces, types, locations, and orientations of objects in the room, and other aspects of the simulations can be sorted into groups and ranges.
  • This grouping can take the form of bands of rooms of similar dimensions, or the dimensions could be transformed and grouped into square footage or cubic footages.
  • Device locations within zones or regions in the rooms can be grouped.
  • Logical orientation, locations, types and other aspects of objects within the room, for example hospital patient beds could be grouped by one or more of these aspects. These groupings can serve to narrow the choices of the look-up table in order to facilitate faster or easier match.
  • the measurements of the room could be grouped or banded into narrower, or more generalized groups, to facilitate faster or easier matching.
  • the present invention addresses the problem, among other things, of achieving a predicted UVC disinfection on any surface in the room. If a user or operator of the UVC device desires to achieve a targeted UVC irradiance, corresponding to a predicted UVC disinfection, on, as just one example, a particular lever on a hospital bed that operates the bed rail adjustment, or, as another example, a particular surface on the doorknob to a bathroom, or any combination of targeted surfaces or combination of similar or different predicted UVC disinfection dosage per target, the present invention teaches how this can be achieved.
  • UVC devices have accuracy tolerances such that, or sufficient UVC light power-on time (disinfection time) or power level can be increased such that, generalized simulations within groupings that do not contain every object or every detail of the room to be disinfected will be sufficient.
  • Many interior rooms are sufficiently predictable in their size and objects and other aspects such that sufficient matching can be accomplished with more generalized simulations within generalized groupings of a narrow set of likely variations.
  • hospital patient rooms tend to be rectangular, tend to have the patient bed in one of two orientations, tend to have the patient bed generally central to the room on the sides of the bed and generally near a wall on the head of the bed, tend to have a bathroom, a sink, a cabinet, and a visitor's chair, all of which are generally within predictable locations within a limited number of configurations. While the permutations of possible configurations can be a large number, simulations can be run on large numbers of permutations and the results analyzed to identify what variations are most important and what variations can be grouped and generalized.
  • Groupings can, as just one example, take the form of rectangular rooms with square footage bands, such as 50-100 square feet, 100-150 square feet, 150-200 square feet and so on.
  • bands of room dimensions could take to form such 8 by 10 feet, 10 by 10 feet, 12 by 10 feet, 14 by 10 feet, 12 by 12 feet, 14 by 12 feet, 14 by 14 feet, and so on.
  • device locations could be grouped to take the form of "within 2 feet of the center of the room", "centered between the right side of the bed and the wall and 2 feet from the foot of the bed along the bed axis" and so on, or, as another example of device locations groupings, the room could be divided into defined quadrants with length as an x axis and width as a y axis and a set convention on the location of the origin such that the grouping could be, for example, within 1 foot of (1,1), (1,3), (1,5), (1,7), (1,9), (3,1), (3,3), (3,7) and so on.
  • the UVC reflectivity can be grouped to take the form of "standard low level reflection", “25% average reflection of surfaces", “50% average reflection”, and so on, or the groupings could include regions of the room where each region has a different level.
  • the extent to which measurable and model-able (simulation) parameters can be grouped or generalized is proportional to how accurate the prediction of UVC disinfection needs to be.
  • the inventors have found that using a reasonable number of room dimension variations, with a limited number of device locations, a limited number of logical room objects in a limited number of locations and orientations, and a limited number of surface UVC reflectivity groupings, provides for sufficient predictive accuracy when solving the problems described herein for most UVC disinfection applications.
  • the degree to which the measurements are sufficiently matched to the simulation via the look-up table could vary depending on the user's desires or other factors. Some applications may require, or some users may desire, that matches be exacting in terms of dimensions or object type or object placement or UVC reflection of surfaces or that a maximum number of targeted surfaces achieve a predicted dose, as examples. Alternatively, some applications or users may allow more approximate matches with large tolerances of mismatches of some parameters.
  • a mobile UVC device comprising a mobile base on caster wheels, a center structural support of high UVC reflectivity, a ring of 8 UVC amalgam type 145 watt high output lamps, a top base, a servo motor actuated sensor module rotatable to 90 degrees mounted to the top base, four time-of- flight laser rangefmders mounted at 90 degree increments about the central axis of the device facing horizontally, two UVC analog output photodiodes calibrated to 0-5000 microwatts per second per square centimeter with 180 degree horizontally oriented field of views via a diffuser assembly configured to measure direct and indirect UVC light, power circuitry and safety interlocks mounted within the mobile base, motion sensors connected to the safety interlocks mounted to the mobile base, a wireless communication module connecting to a remote user interface, a device mounted user interface, a microprocessor containing programming to provide full function to the device as described in the invention.
  • EXAMPLE 2 EXAMPLE 2
  • a mobile UVC device comprising a mobile base containing a self-driving robot base with a powered traction unit, a center aluminum structural support of high UVC reflectivity, a ring of 3 UVC amalgam type 400 watt high output lamps, a top base, a servo motor actuated sensor module rotatable to 180 degrees mounted to the top base, two PrimeSense 3D scanners mounted at 180 degree increments about the central axis of the device facing horizontally, four UVC analog output photodiodes calibrated to 0-2000 microwatts per second per square centimeter with 90-degree horizontally-oriented and 45 -degree vertically-oriented field of views via a subassembly of photodiodes configured to measure direct and indirect UVC light, power circuitry and safety interlocks mounted within the mobile base, motion sensors connected to the safety interlocks mounted to the mobile base, a chord management assembly which unreels power chord as it moves, a wireless communication module connecting to a remote user interface, a device mounted user interfaces,
  • a mobile UVC device comprising a mobile base, a center aluminum structural support of high UVC reflectivity, a ring of 4 UVC amalgam-type 325-watt high output lamps, a top base, power circuitry and safety interlocks mounted within the mobile base, motion sensors connected to the safety interlocks mounted to the mobile base, a user interface to control function of the device, and written guidelines allowing the operator to match the measurable room parameters with UVC device location and disinfection time derived at least partially from groupings of simulation in accordance to the teachings of the invention.

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  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

La présente invention concerne un système de désinfection aux ultraviolets comprenant un dispositif de désinfection aux ultraviolets mobile comprenant un ensemble de lampe UVC, une base mobile et un système de commande; et une table de référence contenant des informations sur un emplacement à désinfecter; les informations contenues dans la table de référence pouvant être utilisées pour actionner l'ensemble de lampe UVC par l'intermédiaire du système de commande pour obtenir au moins une irradiance UVC ciblée, correspondant à une dose de désinfection aux UVC prédite, sur des surfaces ciblées à l'emplacement à désinfecter.
PCT/US2015/013627 2014-01-30 2015-01-30 Dispositif et procédé de désinfection aux ultraviolets WO2015116876A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201461933539P 2014-01-30 2014-01-30
US201461933568P 2014-01-30 2014-01-30
US61/933,568 2014-01-30
US61/933,539 2014-01-30

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PCT/US2015/013906 WO2015116996A1 (fr) 2014-01-30 2015-01-30 Dispositif mobile de désinfection aux ultraviolets à réflecteurs configurables
PCT/US2015/013887 WO2015116987A1 (fr) 2014-01-30 2015-01-30 Dispositif mobile de désinfection à ultraviolets et à réflecteurs fixes
PCT/US2015/013627 WO2015116876A1 (fr) 2014-01-30 2015-01-30 Dispositif et procédé de désinfection aux ultraviolets
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