NL2025397B1 - A system, method and computer program product for detecting flu and/or fever symptoms - Google Patents

A system, method and computer program product for detecting flu and/or fever symptoms Download PDF

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NL2025397B1
NL2025397B1 NL2025397A NL2025397A NL2025397B1 NL 2025397 B1 NL2025397 B1 NL 2025397B1 NL 2025397 A NL2025397 A NL 2025397A NL 2025397 A NL2025397 A NL 2025397A NL 2025397 B1 NL2025397 B1 NL 2025397B1
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signal
heart rate
sensor
person
cost function
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NL2025397A
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Dutch (nl)
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Piotr Karkowski Ireneusz
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Sensara Group B V
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    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/80—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for detecting, monitoring or modelling epidemics or pandemics, e.g. flu
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Biomedical Technology (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Pathology (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Primary Health Care (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The invention relates to a system for detecting flu and/or fever symptoms of a person in a residence. The system comprises a sensor unit arranged for sensing a respiratory rate and a heart rate of a person, and generating corresponding respiratory and heart signals. The system further comprises a processor arranged for receiving the respiratory signal and the heart signal, computing at least one cost function from the received respiratory signal and/or heart signal, determining Whether the at least one cost function exceeds a predetermined threshold value, and generating an alert signal if the predetermined threshold value has been exceeded.

Description

P126895NL00 Title: A system, method and computer program product for detecting flu and/or fever symptoms The invention relates to a system for detecting flu and/or fever symptoms of a person.
Fever may cause a severe breach into a health status of persons, especially elderly people who have a vulnerable health condition, or may ultimately even lead to their death. The fever may be caused by a variety of viruses including the influenza virus or the Corona virus, or by another infection e.g. caused by bacteria.
Fever symptoms are typically detected by measuring a person’s body temperature, using either a temperature sensor contacting the person's body or a contactless temperature sensor such as an infrared sensor.
However, persons, especially people who have a relative low social interaction profile such as some elderly people, may not always be aware of their own fever symptoms. Further, even if they realize that they might suffer from fever symptoms, it might be non-trivial for them to check the alleged fever symptoms by measuring their body temperature, e.g. in the absence of an adequate body temperature sensor, in their physical inability to properly apply such body temperature sensor, or in their psychological and/or social limitations to request another person such as a family member and/or professional caregivers to assist for diagnosing and caring the person if needed.
Monitoring systems are known for monitoring human activities, e.g. for tracking a presence of persons in a building, as e.g. disclosed in European patent EP 2 353 153 B1 mentioning the same inventor.
Therefore, it is an aim of the present invention to solve or alleviate one or more of the above-mentioned disadvantages. In particular, the invention aims at providing a system for detecting fever symptoms of a person in a residence.
Thereto, according to an aspect of the invention, a system for detecting flu and/or fever symptoms of a person in a residence is provided, the system comprising a sensor unit arranged for sensing a respiratory rate of the person, and generating a respiratory signal based on the sensed respiratory rate, and sensing a heart rate of the person, and generating a heart signal based on the sensed heart rate, the system further comprising a processor arranged for receiving the respiratory signal and the heart signal, computing at least one cost function from the received respiratory signal and/or heart signal, determining whether the at least one cost function exceeds a predetermined threshold value, and generating an alert signal if the predetermined threshold value has been exceeded.
By sensing a respiratory rate and a heart rate of the person, and by determining whether or not a cost function based on said sensed physiological parameters exceeds a predetermined threshold value it may be deduced that the person may suffer, within a probability window, from fever symptoms, so as to alert a family member and/or a professional caregiver of said person for realizing adequate care, apart from any initiative of the person himself or herself. The invention is at least partly based on the insight that fever usually induces a faster respiratory rate and/or a faster heart rate than usual.
Further, flu symptoms can be detected, even in the absence of fever as flu typically causes changes in the behaviour and/or an increased respiratory rate.
The sensor unit may include a single sensor element for sensing both the respiratory rate and the heart rate of the person. Alternatively, multiple sensor elements may be used for sensing the respiratory and/or heart rate.
Advantageously, the sensor unit includes an occupancy sensor for sensing the respiratory rate and/or the heart rate of the person, such as a sensor registering movements of the body imparted by ballistic forces such as recoil and impact associated with cardiac contraction and ejection of blood and with the deceleration of blood flow through the large blood vessels, also known as ballistocardiography transducer. The sensor can be placed in furniture in the residence, e.g. in or below a chair or bed, e.g.
performing a contactless measurement below a bed matrass, that is used by the person so as to effectively integrating the system in the residence of the person.
The at least one cost function may have a weighed sum including a first term based on the respiratory signal, e.g. based on a difference between the respiratory signal and an average respiratory signal, and a second term based on the heart signal, e.g. based on a difference between the heart signal and an average heart signal. Alternatively, the processor may be arranged for computing a first and a second cost function, from the respiratory signal and the heart signal, respectively, for determining whether at least one of the cost functions exceeds a respiratory or heart threshold value, so as to monitor both the respiratory behaviour and the heart behaviour completely separately. In a preferred embodiment, the system comprises a single or a multiple number of presence sensors, such as a door sensor and/or a movement sensor in the residence. Then, the at least one cost function may also includes behavioral values determined from said presence sensors and/or the sensor unit, such as representing an occurrence of sleep interruptions, a number of sleep interruptions, a sum of inactive time periods per day spent outside a bedroom, a total time spent in bed per day, a wake-up time, a breakfast time, a sleep-in time, a social interaction indicator value, an activity score, a number of toilet visits per day, and/or a trend in a single or a multiple number of behavioral characteristics over time. By including behavioral values in the at least one cost function both behavioral data and physiological indicative parameters can be processed in an integral manner to reliably detect any flu and/or fever symptoms.
Advantageously, the processor is arranged for filtering out false alarm scenarios, including a scenario wherein the user is on holiday, a scenario wherein the user spends a time period per day outdoors, a scenario wherein the user suffers from a day-night rhythm reversal or another sleep disorder, and/or a scenario wherein the system technically fails, thereby improving a reliability performance of the system.
Further, the invention relates to a method of detecting flu and/or fever symptoms of a person in a residence.
The invention also relates to a computer program product. A computer program product may comprise a set of computer executable instructions stored on a data carrier, such as a flash memory, a CD or a DVD. The set of computer executable instructions, which allow a programmable computer to carry out the method as defined above, may also be available for downloading from a remote server, for example via the Internet, e.g. as an app.
Further advantageous embodiments according to the invention are described in the following claims.
It should be noted that the technical features described above or below may each on its own be embodied in a system and/or in a method, i.e. isolated from the context in which it is described, separate from other features, or in combination with only a number of the other features described in the context in which it is disclosed. Each of these features may further be combined with any other feature disclosed, in any combination.
The invention will be further elucidated on the basis of exemplary embodiments which are represented in the drawings. The exemplary embodiments are given by way of non-limitative illustration of the invention. In the drawings:
Fig. 1 shows a schematic overview of a system for detecting flu and/or fever symptoms of a person according to the invention; Fig. 2 shows a schematic map of a residence including another system for detecting flu and/or fever symptoms of a person according to the 5 invention, and Fig. 3 shows a flow chart of a method of detecting flu and/or fever symptoms of a person according to the invention.
In the figures identical or corresponding parts are represented with the same reference numerals. The drawings are only schematic representations of embodiments of the invention, which are given by manner of non-limited examples.
Figure 1 shows a schematic overview of a system 1 for detecting flu and/or fever symptoms of a person according to the invention in a residence, comprising a sensor unit 2. The sensor unit 2 is arranged for sensing a respiratory rate of the person, and for generating a respiratory signal RS based on the sensed respiratory rate. Further, the sensor unit 2 is arranged for sensing a heart rate of the person, and generating a heart signal HS based on the sensed heart rate. The system 1 further comprises a processor 3 arranged for receiving the respiratory signal RS and the heart signal HS.
The processor 3 is arranged for computing at least one cost function from the received respiratory signal RS and/or heart signal HS and for determining whether the at least one cost function exceeds a predetermined threshold value. When the predetermined threshold value has been exceeded, the processor 3 is arranged for generating an alert signal AS. The alert signal AS may be sent to a data-processor 7, such as a computer, mobile phone, tablet or other electronic communication device, which 1s arranged for receiving and processing the alert signal AS. The data- processor 7 can be used by family or a caregiver of the person allegedly showing signs of fever, giving them an opportunity to check in with the person and to take necessary steps if needed.
In the embodiment shown in Fig. 1, the sensor unit 2 includes a single sensor element for sensing both the respiratory rate and the heart rate of the person. However, the sensor unit 2 may also include multiple sensor elements e.g. a first set of one or more sensor elements for sensing the respiratory rate and a second set of one or more sensor elements heart rate of the person separately. Then, in an exemplary embodiment, the sensor unit 2 includes first sensor element for sensing the respiratory rate and a second sensor element for sensing the heart rate.
Further, in an embodiment, the sensor unit 2 includes an occupancy sensor, preferably a ballistocardiography transducer, for sensing the respiratory rate and/or the heart rate of the person. Alternative to an occupancy sensor, the sensor unit includes another sensor type, such as a sensor sensing a change in for instance a local thickness of the cushions or matrass when the person sits or lies down, or a sensor sensing an increase in local density of material in a matrass or similar.
Figure 2 shows a schematic map of a residence 105 including another system 100 for detecting flu and/or fever symptoms of a person according to the invention. Similar to the system 1 shown in Fig. 1, the system includes a processor 103 for receiving respiratory signal RS and heart signal HS, computing at least one cost function, determining whether the at least one cost function exceeds a predetermined threshold value, and for generating an alert signal AS if the predetermined threshold value has been exceeded.
In the embodiment shown in Fig. 2, the system 100 comprises multiple sensor units 104, each unit 104 arranged for sensing the respiratory rate and the heart rate of the person, as well as for generating the respiratory signal RS and the heart signal HS. The multiple sensor units 104 are placed in a chair 106, couch 108 or bed 109 in the residence 105, respectively of the person. It is noted that the sensor units 104 can be applied in, on or below other another furniture, such as a sofa or component of the residence, such as a tile or ground layer supporting a sleeping furniture. In the shown embodiment, three sensor units 104 are applied. However, generally, the system 100 may include more than three sensor units, e.g. four, five, six, or ten sensor units, or less than then three sensor units, e.g. one or two sensor units.
During sleep of the person, the respiratory rate and heart rate of a person can thus be measured accurately, providing a reliable non-invasive and user friendly alternative to known invasive measurement tools such as smart watches.
The at least one cost function may include a weighed sum including a first term based on the respiratory signal RS and a second term based on the heart signal AS. The first term can be based on a difference between the respiratory signal RS and an average respiratory signal and the second term can be based on a difference between the heart signal HS and an average heart signal. The first term can for instance be the square of a normalized signal, i.e. an average respiratory signal subtracted from the respiratory signal RS, then squared and subsequently multiplied by a factor in order to have a weighted factor to weigh the influence of the respiratory signal RS with respect to the heart signal HS. The second term can be composed similar to the first term, but based on the heart signal HS, and optionally an average heart signal. It appears that the respiratory signal and the heart signal during rest of a person in healthy conditions may be relatively stable, especially during sleep, thereby providing a suitable average respiratory signal and average hear signal. Then, deviations in the respiratory signal and/or the heart signal due to flu and/or fever symptoms can be detected in a relative reliable manner.
Apparently, other weighed cost functions can be applied, e.g. logarithmic or exponential functions of the sensed signals and/or including a third term, e.g. for computational stability.
Alternatively, to a single weighed cost function, two cost functions can be applied, e.g. a first cost function from the received respiratory signal RS and a second cost function from the received heart signal HS can be computed.
The processor 3 can then be arranged for determining whether the first cost function exceeds a respiratory threshold value, determining whether the second cost function exceeds a heart threshold value, and generating an alert signal AS if the respiratory threshold value and/or the heart threshold value has been exceeded.
In the embodiment shown in Fig. 2, the system 100 further comprises presence sensors, such as a door sensor 110, positioned near or on a door 111 in the residence 105 and a movement sensor 112 on a wall.
The at least one cost function now also includes behavioral values determined from said presence sensors 111,112 and/or the sensor units 104. Apparently, the shown presence sensors may be applied at other locations in the residence 105. Further more and/or other presence sensors may be applied.
The behavioral values represent a behavioral characteristic of the person, including an occurrence of sleep interruptions, a number of sleep interruptions, a sum of inactive time periods per day spent outside a bedroom, a total time spent in bed per day, a wake-up time, a breakfast time, a sleep-in time, a social interaction indicator value, an activity score, a number of toilet visits per day, and/or a trend in a single or a multiple number of behavioral characteristics over time.
Here, knowledge about any correlation between behavioral characteristics on the one hand, such as sleep naps during the day time, and flu and/or fever symptoms on the other hand can be included in the system.
The processor 103 may further be arranged for filtering out false alarm scenarios, including a scenario wherein the user is on holiday, a scenario wherein the user spends a time period per day outdoors, a scenario wherein the user suffers from a day-night rhythm reversal or another sleep disorder, and/or a scenario wherein the system technically fails.
Figure 3 shows a flow chart of a method of detecting flu and/or fever symptoms of a person according to the invention. The method includes a step of sensing 213 a respiratory rate of the person, and generating a respiratory signal RS based on the sensed respiratory rate, a step of sensing 214 a heart rate of the person, and generating a heart signal HS based on the sensed heart rate, a step of receiving 215 the respiratory signal RS and the hart signal HS, a step of computing 216 at least one cost function from the received respiratory signal RS and/or heart signal HS, a step of determining 217 whether the at least one cost function exceeds a predetermined threshold value, and a step of generating 218 an alert signal if the predetermined threshold value has been exceeded.
The method of detecting flu and/or fever symptoms of a person can be facilitated using dedicated hardware structures, such as FPGA and/or ASIC components. Otherwise, the method can also at least partially be performed using a computer program product comprising instructions for causing a processor of a computer system or a control unit to detect flu and/or fever symptoms, especially the steps 215-218 of receiving, computing, determining and generating. All (sub)steps can in principle be performed on a single processor. However, it is noted that at least one step can be performed on a separate processor. A processor can be loaded with a specific software module. Dedicated software modules can be provided, e.g. from the Internet.
As described above, the at least one cost function may be based on the respiratory signal, the heart signal and on a single or a multiple number of behavioral values determined from presence sensors and/or the sensor unit. In principle, the at least one cost function may be based on the respiratory signal and/or the heart signal, without any behavioral values, then saving the presence sensors shown in Fig. 2.
It is noted however, that the respiratory signal or the heart signal may be removed from the at least one cost function such that the heart signal or the respiratory signal remains in the cost function, optionally with behavioral values.
Further, the at least one cost function may be based on a single or multiple number of said behavioral values only, e.g. not in combination with the respiratory signal and/or the heart signal. Then, a system and method for detecting flu and/or fever symptoms is obtained wherein the at least one cost function is based on behavioral values only.
Accordingly, a system may be provided for detecting flu and/or fever symptoms of a person in a residence, comprising a presence sensor, such as a door sensor and/or a movement sensor in the residence, the system further comprising a processor arranged for receiving a sensing signal from the presence sensor, for computing at least one cost function including behavioral values determined from the received sensing signal, for determining whether the at least one cost function exceeds a predetermined threshold value, and for generating an alert signal if the predetermined threshold value has been exceeded.
The invention is not restricted to the embodiments described above. It will be understood that many variants are possible. These and other embodiments will be apparent for the person skilled in the art and are considered to fall within the scope of the invention as defined in the following claims. For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments. However, it will be appreciated that the scope of the invention may include embodiments having combinations of all or some of the features described.

Claims (12)

ConclusiesConclusions 1. Systeem voor het detecteren van griep en/of koorts symptomen van een persoon in een woning, omvattende een sensoreenheid die is ingericht voor: - het waarnemen van een ademhalingstempo van een persoon, en het genereren van een ademhalingssignaal gebaseerd op het waargenomen ademhalingstempo, en - het waarnemen van een hartslagtempo van een persoon, en het genereren van een hartslagsignaal gebaseerd op het waargenomen hartslagtempo, waarbij het systeem verder een verwerkingseenheid omvat die is ingericht voor: - het ontvangen van het ademhalingssignaal en het hartslagsignaal, - het berekenen van ten minste één kostenfunctie van het ontvangen ademhalingssignaal en/of hartslagsignaal, - het vaststellen of de ten minste ene kostenfunctie een vooraf bepaalde drempelwaarde overschrijdt, en - het genereren van een alarmsignaal wanneer de vooraf bepaalde drempelwaarde is overschreden, waarbij de sensoreenheid een bezettingssensor (occupaney sensor) omvat, bij voorkeur een ballistocardiografische omzetter, voor het waarnemen van het ademhalingstempo en/of het hartslagtempo van de persoon, of een sensor die is ingericht voor het meten van een verandering in bijvoorbeeld een lokale dikte van kussen of matras, of een sensor die is ingericht voor het meten van een toename in lokale dichtheid van materiaal in een matras of dergelijke, waarbij de sensor bij voorkeur is geplaatst in, op of onder een stoel, bank, bed of een ander meubilair zoals een sofa of component van de woning zoals een tegel of grondlaag die een slaapmeubel ondersteunt.A system for detecting flu and/or fever symptoms of a person in a home, comprising a sensor unit adapted to: detect a person's respiratory rate, and generate a respiratory signal based on the sensed respiratory rate, and - detecting a heart rate of a person, and generating a heart rate signal based on the sensed heart rate, the system further comprising a processing unit configured to: - receive the respiration signal and the heart rate signal, - calculate ten at least one cost function of the received respiratory signal and/or heart rate signal, - determining whether the at least one cost function exceeds a predetermined threshold value, and - generating an alarm signal when the predetermined threshold value is exceeded, wherein the sensor unit comprises an occupancy sensor ) includes, preferably a ballistocardiograph transducer, for detecting the breathing rate and/or heart rate of the person, or a sensor adapted to measure a change in, for example, a local thickness of a pillow or mattress, or a sensor adapted to measure an increase in local density of material in a mattress or the like, wherein the sensor is preferably placed in, on or under a chair, sofa, bed or other furniture such as a sofa or component of the home such as a tile or base layer containing a sleeping furniture supports. 2. Systeem volgens conclusie 1, waarbij de sensoreenheid een enkelvoudig sensorelement omvat voor het waarnemen van zowel het ademhalingstempo als het hartslagtempo van de persoon.The system of claim 1, wherein the sensor unit comprises a single sensor element for sensing both the breathing rate and the heart rate of the subject. 3. Systeem volgens conclusie 1 of 2, waarbij de sensoreenheid een bezettingssensor omvat voor het waarnemen van het ademhalingstempo en/of het hartslagtempo van de persoon.System according to claim 1 or 2, wherein the sensor unit comprises an occupation sensor for detecting the breathing rate and/or the heart rate of the person. 4. Systeem volgens conclusie 2 of 3, waarbij het sensorelement in of onder een stoel of bed in de woning is geplaatst.System according to claim 2 or 3, wherein the sensor element is placed in or under a chair or bed in the house. 5. Systeem volgens een van de voorgaande conclusies, waarbij de ten minste ene kostenfunctie een gewogen som omvat die een eerste term gebaseerd op het ademhalingssignaal en een tweede term gebaseerd op het hartslagsignaal omvat.The system of any preceding claim, wherein the at least one cost function comprises a weighted sum comprising a first term based on the respiration signal and a second term based on the heart rate signal. 6. Systeem volgens conclusie 5, waarbij de eerste term is gebaseerd op een verschil tussen het ademhalingssignaal en een gemiddeld ademhalingssignaal en waarbij de tweede term is gebaseerd op een verschil tussen het hartslagsignaal en een gemiddeld hartslagsignaal.The system of claim 5, wherein the first term is based on a difference between the respiration signal and an average respiration signal and wherein the second term is based on a difference between the heart rate signal and an average heart rate signal. 7. Systeem volgens een van de voorgaande conclusies 1-4, waarbij de verwerkingseenheid is ingericht voor: - het berekenen van een eerste kostenfunctie van een ontvangen ademhalingssignaal, - het berekenen van een tweede kostenfunctie van een ontvangen hartslagsignaal, - het vaststellen of de eerste kostenfunctie een ademhalingsdrempelwaarde overschrijdt, - het vaststellen of de tweede kostenfunctie een hartslagdrempelwaarde overschrijdt, en - het genereren van een alarmsignaal wanneer de ademhalingsdrempelwaarde en/of de hartslagdrempelwaarde is overschreden.System according to one of the preceding claims 1-4, wherein the processing unit is arranged for: - calculating a first cost function of a received respiratory signal, - calculating a second cost function of a received heart rate signal, - determining whether the first cost function exceeds a respiration threshold value, - determining whether the second cost function exceeds a heart rate threshold value, and - generating an alarm signal when the respiration threshold value and/or the heart rate threshold value is exceeded. 8. Systeem volgens een van de voorgaande conclusies, verder omvattende een aanwezigheidssensor, zoals een deursensor en/of een bewegingssensor in de woning, en waarbij de tenminste ene kostenfunctie ook gedragswaardes omvat die zijn vastgesteld door genoemde aanwezigheidssensoren en/of de sensoreenheid.System according to any of the preceding claims, further comprising a presence sensor, such as a door sensor and/or a motion sensor in the home, and wherein the at least one cost function also comprises behavioral values determined by said presence sensors and/or the sensor unit. 9. Systeem volgens conclusie 8, waarbij de gedragswaardes een gedragskenmerk van de persoon voorstellen, omvattende een optreden van slaaponderbrekingen, een aantal slaaponderbrekingen, een som van inactieve tijdsperiodes per dag besteed buiten een slaapkamer, een totale tijd besteed in bed per dag, een ontwaaktijd, een ontbijttijd, een inslaaptijd, een sociale interactie indicatiewaarde, een activiteitscore, een aantal toiletbezoeken per dag, en/of een trend in een enkelvoudig of een meervoudig aantal gedragskenmerken gedurende de tijd.The system of claim 8, wherein the behavioral values represent a behavioral characteristic of the person, including an occurrence of sleep interruptions, a number of sleep interruptions, a sum of inactive periods of time per day spent outside a bedroom, a total time spent in bed per day, a wake time , a breakfast time, a sleep time, a social interaction indicator value, an activity score, a number of toilet visits per day, and/or a trend in a single or multiple number of behavioral characteristics over time. 10. Systeem volgens een van de voorgaande conclusies, waarbij de verwerkingseenheid is ingericht om vals-alarmscenario’s uit te filteren, omvattende een scenario waarbij de gebruiker op vakantie is, een scenario waarbij de gebruiker een tijdsperiode per dag buiten besteedt, een scenario waarbij de gebruiker een dag-nacht ritme-omkering of een ander slaapprobleem heeft, en/of een scenario waarbij het systeem technisch faalt.The system of any preceding claim, wherein the processing unit is configured to filter out false alarm scenarios, including a scenario where the user is on vacation, a scenario where the user spends a period of time per day outside, a scenario where the user has a day-night rhythm reversal or other sleep problem, and/or a scenario where the system is technically failing. 11. Werkwijze voor het detecteren van griep en/of koorts symptomen van een persoon in een woning, omvattende de stappen van: - het waarnemen van een ademhalingstempo van een persoon, en het genereren vaneen ademhalingssignaal gebaseerd op het waargenomen ademhalingstempo, en - het waarnemen van een hartslagtempo van een persoon, en het genereren van een hartslagsignaal gebaseerd op het waargenomen hartslagtempo, - het ontvangen van het ademhalingssignaal en het hartslagsignaal - het berekenen van ten minste één kostenfunctie van het ontvangen ademhalingssignaal en/of hartslagsignaal, - het vaststellen of de ten minste ene kostenfunctie een vooraf bepaalde drempelwaarde overschrijdt, en - het genereren van een alarmsignaal wanneer de vooraf bepaalde drempelwaarde wordt overschreden, waarbij de sensoreenheid een bezettingssensor (occupancy sensor) omvat, bij voorkeur een ballistocardiografische omzetter, voor het waarnemen van het ademhalingstempo en/of het hartslagtempo van de persoon, of een sensor die is ingericht voor het meten van een verandering in bijvoorbeeld een lokale dikte van kussen of matras, of een sensor die is ingericht voor het meten van een toename in lokale dichtheid van materiaal in een matras of dergelijke,A method for detecting flu and/or fever symptoms of a person in a home, comprising the steps of: - sensing a person's respiratory rate, and generating a respiratory signal based on the sensed respiratory rate, and - sensing of a heart rate of a person, and generating a heart rate signal based on the sensed heart rate, - receiving the respiration signal and the heart rate signal - calculating at least one cost function of the received respiration signal and/or heart rate signal, - determining whether the at least one cost function exceeds a predetermined threshold value, and - generating an alarm signal when the predetermined threshold value is exceeded, the sensor unit comprising an occupancy sensor, preferably a ballistocardiographic transducer, for sensing the respiratory rate and/or or the person's heart rate, or a sensor adapted to measure a change in, for example, a local thickness of pillow or mattress, or a sensor adapted to measure an increase in local density of material in a mattress or the like, waarbij de sensor bij voorkeur is geplaatst in, op of onder een stoel, bank, bed of een ander meubilair zoals een sofa of component van de woning zoals een tegel of grondlaag die een slaapmeubel ondersteunt.wherein the sensor is preferably placed in, on or under a chair, sofa, bed or other furniture such as a sofa or component of the home such as a tile or base that supports a sleeping furniture. 12. Computerprogrammaproduct voor het detecteren van griep en/of koorts symptomen van een persoon in een woning, waarbij het computerprogrammaproduct een door een computer leesbare code omvat om een verwerkingseenheid de stappen uit te laten voeren van: - het ontvangen van een ademhalingssignaal gebaseerd op een waargenomen ademhalingstempo van een persoon, - het ontvangen van een hartslagsignaal gebaseerd op een waargenomen hartslagtempo van genoemd persoon, - het berekenen van ten minste één kostenfunctie van het ontvangen ademhalingssignaal en/of hartslagsignaal, - het vaststellen of de tenminste ene kostenfunctie een vooraf bepaalde drempelwaarde overschrijdt, en - het genereren van een alarmsignaal wanneer de vooraf bepaalde grenswaarde wordt overschreden, waarbij de sensoreenheid een bezettingssensor (occupancy sensor) omvat, bij voorkeur een ballistocardiografische omzetter, voor het waarnemen van het ademhalingstempo en/of het hartslagtempo van de persoon, of een sensor die is ingericht voor het meten van een verandering in bijvoorbeeld een lokale dikte van kussen of matras, of een sensor die is ingericht voor het meten van een toename in lokale dichtheid van materiaal in een matras of dergelijke, waarbij de sensor bij voorkeur is geplaatst in, op of onder een stoel, bank, bed of een ander meubilair zoals een sofa of component van de woning zoals een tegel of grondlaag die een slaapmeubel ondersteunt.A computer program product for detecting flu and/or fever symptoms of a person in a home, the computer program product comprising a computer readable code for causing a processing unit to perform the steps of: - receiving a respiratory signal based on a sensed respiration rate of a person, - receiving a heart rate signal based on a sensed heart rate rate of said person, - calculating at least one cost function of the received respiration signal and/or heart rate signal, - determining whether the at least one cost function has a predetermined threshold value exceeds, and - generating an alarm signal when the predetermined limit value is exceeded, the sensor unit comprising an occupancy sensor, preferably a ballistocardiographic transducer, for sensing the breathing rate and/or the heart rate of the person, or a sensor that is arranged for measuring a change in, for example, a local thickness of pillow or mattress, or a sensor adapted for measuring an increase in local density of material in a mattress or the like, wherein the sensor is preferably placed in, on or under a chair, sofa, bed or other furniture such as a sofa or component of the home such as a tile or primer supporting a sleeping furniture.
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