CA3080548A1 - Noncontact fever screening system - Google Patents
Noncontact fever screening system Download PDFInfo
- Publication number
- CA3080548A1 CA3080548A1 CA3080548A CA3080548A CA3080548A1 CA 3080548 A1 CA3080548 A1 CA 3080548A1 CA 3080548 A CA3080548 A CA 3080548A CA 3080548 A CA3080548 A CA 3080548A CA 3080548 A1 CA3080548 A1 CA 3080548A1
- Authority
- CA
- Canada
- Prior art keywords
- temperature
- fever
- thermal sensors
- frame assembly
- noncontact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 206010037660 Pyrexia Diseases 0.000 title claims abstract description 19
- 238000012216 screening Methods 0.000 title description 6
- 230000036760 body temperature Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 241000282412 Homo Species 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 208000025721 COVID-19 Diseases 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
Abstract
A noncontact fever detection system for determining presence of the elevated body temperature in a human subject is disclosed, including a frame assembly, an array of thermal sensors located on the frame assembly, a system controller including a temperature processor, a fever threshold temperature generator, a temperature comparator, and an indicator.
Description
NONCONTACT FEVER SCREENING SYSTEM
FIELD
The present invention relates to devices for the automatic screening of people for fever.
BACKGROUND
With the rapid spread of infectious diseases around the world, including COVID-19, effective screening techniques are required, particularly at high-traffic, public locations such as airports, schools, hospitals, sports stadiums, building lobbies and stores. Thermal scanning to detect elevated body temperature is a common method for detecting fever in symptomatic travelers. Handheld non-contact thermometers are commonly used to take a traveler's temperature. A skilled operator is required to properly use a handheld thermometer and to interpret the temperature readings. Handheld units are also not ideal in mass screening situations, such as at airports, where time is lost by the person being screened having to stop and standstill while the operator aims the handheld unit at the traveler, takes a reading and interprets the reading. Thermal imaging has also been used but thermal imaging cameras are sensitive to ambient temperature changes which affects their accuracy.
An automatic system for fever screening of humans would be desirable.
Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present invention as it existed before the priority date of each claim of this application.
SUMMARY OF THE INVENTION
The present disclosure, in one aspect, relates to a noncontact fever detection system for determining presence of the elevated body temperature in a human subject, including a frame assembly, an array of thermal sensors located on the frame assembly,
FIELD
The present invention relates to devices for the automatic screening of people for fever.
BACKGROUND
With the rapid spread of infectious diseases around the world, including COVID-19, effective screening techniques are required, particularly at high-traffic, public locations such as airports, schools, hospitals, sports stadiums, building lobbies and stores. Thermal scanning to detect elevated body temperature is a common method for detecting fever in symptomatic travelers. Handheld non-contact thermometers are commonly used to take a traveler's temperature. A skilled operator is required to properly use a handheld thermometer and to interpret the temperature readings. Handheld units are also not ideal in mass screening situations, such as at airports, where time is lost by the person being screened having to stop and standstill while the operator aims the handheld unit at the traveler, takes a reading and interprets the reading. Thermal imaging has also been used but thermal imaging cameras are sensitive to ambient temperature changes which affects their accuracy.
An automatic system for fever screening of humans would be desirable.
Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present invention as it existed before the priority date of each claim of this application.
SUMMARY OF THE INVENTION
The present disclosure, in one aspect, relates to a noncontact fever detection system for determining presence of the elevated body temperature in a human subject, including a frame assembly, an array of thermal sensors located on the frame assembly,
2 4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06 a system controller including a temperature processor, a fever threshold generator, and a temperature comparator, and an indicator. In another embodiment, the thermal sensors are digital thermometers.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of a frame assembly according to an embodiment of the present invention;
FIG. 2 is a thermal sensor according to an embodiment of the present invention;and FIG. 3 is a schematic diagram of an I2C daisy chain according to the present invention.
DETAILED DESCRIPTION
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
In one embodiment, the present invention relates to a noncontact fever detection system including a square horseshoe-shaped metal frame assembly indicated generally at 2. In other embodiments, other suitable materials may be used for the frame assembly.
The frame assembly includes two base members C on castors K, two upright members B and a cross member A. An array of nineteen thermal sensors are located on the frame with a series of seven thermal sensors 4 located along the cross member and at a spacing of about 150 mm between the thermal sensors. Six thermal sensors are located on the each upright member at a spacing of about 200 mm between the thermal sensors.
The bottom most thermal sensor on the upright members is 1 m above the floor surface. In one embodiment, the detectors 4 on the upright members B are designed to accommodate differences in height among humans passing through the frame assembly 2. A plurality of thermal sensors increases the probability of at least one of the thermal sensors making an accurate temperature measurement. In other embodiments, the number of thermal sensors, their spacing and height above the floor can be varied.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of a frame assembly according to an embodiment of the present invention;
FIG. 2 is a thermal sensor according to an embodiment of the present invention;and FIG. 3 is a schematic diagram of an I2C daisy chain according to the present invention.
DETAILED DESCRIPTION
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
In one embodiment, the present invention relates to a noncontact fever detection system including a square horseshoe-shaped metal frame assembly indicated generally at 2. In other embodiments, other suitable materials may be used for the frame assembly.
The frame assembly includes two base members C on castors K, two upright members B and a cross member A. An array of nineteen thermal sensors are located on the frame with a series of seven thermal sensors 4 located along the cross member and at a spacing of about 150 mm between the thermal sensors. Six thermal sensors are located on the each upright member at a spacing of about 200 mm between the thermal sensors.
The bottom most thermal sensor on the upright members is 1 m above the floor surface. In one embodiment, the detectors 4 on the upright members B are designed to accommodate differences in height among humans passing through the frame assembly 2. A plurality of thermal sensors increases the probability of at least one of the thermal sensors making an accurate temperature measurement. In other embodiments, the number of thermal sensors, their spacing and height above the floor can be varied.
3 4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06 Referring to FIG. 2, in one embodiment, the thermal sensors 4 are oriented toward the ground in the direction of an on-coming person who is due to pass through the frame assembly 2. In one embodiment, the thermal sensors 4 are oriented at about a 45 degree angle relative to the vertical plane 6 of the frame. In one embodiment, the thermal sensors are infrared sensors. In another embodiment, the thermal sensor a 5 field of view 8. In another embodiment, the thermal sensors are thermal sensors with medical accuracy, where in one embodiment, the accuracy is 0.1 C in a limited temperature range for fever.
In another embodiment, the thermal sensor is an infrared thermometer. In another embodiment, the infrared thermometer includes an infrared sensitive detector chip. In another embodiment, the infrared thermometer has a temperature range with a resolution of 0.02 C. In another embodiment, the thermal sensors are positioned such that at least one of the sensors detects a temperature from the surface of the skin between the eyebrows of a human passing through the frame assembly. In another embodiment, the thermal sensors are connected by a computer bus.
In another embodiment, up to 127 thermal sensors can be connect using a single computer bus. Referring to FIG. 3, in one embodiment, the thermal sensors communicate through an I2C (Inter-Integrated Circuit) computer bus where the thermal sensors 4 are linked in a daisy chain to controller 10 which includes a temperature processior 12, a fever threshold temperature generator 14, a temperature comparator 16. In another embodiment, each thermal sensor is programed with a unique IP address which enables the system to identify which thermal sensor detected a temperature above a pre-set threshold. In another embodiment, the output of the thermal sensors can be configured to be pulse width modulation (PWM).
In operation, when a person passes through the device, the thermal sensors take temperature readings. The temperature readings are sent to a temperature processing equipment. A fever threshold generator generates a fever threshold temperature and a temperature comparator compares the temperature readings from the thermal sensors to the fever threshold temperature. If a temperature reading from at least one of the thermal sensors is above the fever threshold temperature, an indicator is triggered to provide an
In another embodiment, the thermal sensor is an infrared thermometer. In another embodiment, the infrared thermometer includes an infrared sensitive detector chip. In another embodiment, the infrared thermometer has a temperature range with a resolution of 0.02 C. In another embodiment, the thermal sensors are positioned such that at least one of the sensors detects a temperature from the surface of the skin between the eyebrows of a human passing through the frame assembly. In another embodiment, the thermal sensors are connected by a computer bus.
In another embodiment, up to 127 thermal sensors can be connect using a single computer bus. Referring to FIG. 3, in one embodiment, the thermal sensors communicate through an I2C (Inter-Integrated Circuit) computer bus where the thermal sensors 4 are linked in a daisy chain to controller 10 which includes a temperature processior 12, a fever threshold temperature generator 14, a temperature comparator 16. In another embodiment, each thermal sensor is programed with a unique IP address which enables the system to identify which thermal sensor detected a temperature above a pre-set threshold. In another embodiment, the output of the thermal sensors can be configured to be pulse width modulation (PWM).
In operation, when a person passes through the device, the thermal sensors take temperature readings. The temperature readings are sent to a temperature processing equipment. A fever threshold generator generates a fever threshold temperature and a temperature comparator compares the temperature readings from the thermal sensors to the fever threshold temperature. If a temperature reading from at least one of the thermal sensors is above the fever threshold temperature, an indicator is triggered to provide an
4 4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06 alert that a fever temperature reading has been taken. The indicator can be a light, an audible alarm or the like.
4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06
4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06
Claims
1. A noncontact fever detection system for determining presence of the elevated body temperature in a human subject, comprising:
a frame assembly, an array of thermal sensors located on the frame assembly, a controller comprising a temperature processor, a fever threshold temperature generator, a temperature comparator, and an indicator.
4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06
a frame assembly, an array of thermal sensors located on the frame assembly, a controller comprising a temperature processor, a fever threshold temperature generator, a temperature comparator, and an indicator.
4819-1707-5644, v. 1 Date Recue/Date Received 2020-05-06
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3080548A CA3080548A1 (en) | 2020-05-06 | 2020-05-06 | Noncontact fever screening system |
| PCT/IB2021/000309 WO2021224684A1 (en) | 2020-05-06 | 2021-05-05 | Non-contact fever screening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3080548A CA3080548A1 (en) | 2020-05-06 | 2020-05-06 | Noncontact fever screening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3080548A1 true CA3080548A1 (en) | 2021-11-06 |
Family
ID=78413534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3080548A Abandoned CA3080548A1 (en) | 2020-05-06 | 2020-05-06 | Noncontact fever screening system |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA3080548A1 (en) |
| WO (1) | WO2021224684A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7248204B2 (en) * | 2001-09-28 | 2007-07-24 | Trex Enterprises Corp | Security system with metal detection and mm-wave imaging |
| CN1329716C (en) * | 2003-04-20 | 2007-08-01 | 深圳清华大学研究院 | Scanning type non-contact infrared body temperature detection instrument and body temperature detection method |
| WO2012067282A1 (en) * | 2010-11-17 | 2012-05-24 | (주)이지템 | Mobile device and method for measuring temperature of thermal picture including body temperature |
| CN202141525U (en) * | 2011-06-30 | 2012-02-08 | 北京英诺维思科技有限公司 | Temperature monitoring and alarming device for key terminals of passenger train control cabinet |
-
2020
- 2020-05-06 CA CA3080548A patent/CA3080548A1/en not_active Abandoned
-
2021
- 2021-05-05 WO PCT/IB2021/000309 patent/WO2021224684A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021224684A1 (en) | 2021-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20231107 |