EP4146353A1 - Dispositif de capteur pour un dispositif de protection de la bouche et du nez, et dispositif de protection de la bouche et du nez - Google Patents

Dispositif de capteur pour un dispositif de protection de la bouche et du nez, et dispositif de protection de la bouche et du nez

Info

Publication number
EP4146353A1
EP4146353A1 EP21723983.9A EP21723983A EP4146353A1 EP 4146353 A1 EP4146353 A1 EP 4146353A1 EP 21723983 A EP21723983 A EP 21723983A EP 4146353 A1 EP4146353 A1 EP 4146353A1
Authority
EP
European Patent Office
Prior art keywords
sensor
sensor device
mouth
unit
nose
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.)
Withdrawn
Application number
EP21723983.9A
Other languages
German (de)
English (en)
Inventor
Bernhard Ostrick
Wolfgang Schreiber-Prillwitz
Waldemar UNRAU
Axel Pecina
Masahiro Oishi
Masayuki Muroi
Yongli Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Electronics AG
Original Assignee
TDK Electronics AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102020112450.3A external-priority patent/DE102020112450B4/de
Application filed by TDK Electronics AG filed Critical TDK Electronics AG
Publication of EP4146353A1 publication Critical patent/EP4146353A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/006—Indicators or warning devices, e.g. of low pressure, contamination
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/001—Energy harvesting or scavenging

Definitions

  • the invention relates to a sensor device for mouth and nose protection and to a mouth and nose protection device which comprises the sensor device.
  • Medical half face masks or makeshift mouth and nose masks are an aid to reducing the transmission of pathogens to others through secretion droplets. Such masks lose their effectiveness when the mask is moistened.
  • medical masks for example, there is a recommendation that they should be disposed of and replaced if possible after each use, but if necessary after a maximum of eight hours or as soon as they have become damp.
  • makeshift mouth and nose masks there is a recommendation that they should be removed and replaced as soon as they become damp and should be replaced after a maximum of one day.
  • the object on which the invention is based is to provide a sensor device and a mouth and nose protection device which provide a needs-based indication for changing mouth and nose protection.
  • the invention is characterized by a sensor device for arrangement on a mouth and nose protector.
  • the mouth and nose protection is designed as a half face mask and has one or more layers of paper and / or one or more layers of fabric to cover a mouth and nose area of a user.
  • the sensor device comprises a sensor unit with at least one sensor element.
  • the sensor unit is set up to detect individual breathing processes of the user when the mouth and nose mask is used together with the sensor device by a user.
  • the sensor device also has an evaluation unit.
  • the evaluation unit comprises a counter and is set up to count the respiratory processes of the user as a function of a detection signal provided by the sensor unit.
  • the evaluation unit is also set up to provide an evaluation signal for a signaling unit as a function of a determined number of breathing processes.
  • Mouth and nose protection in the context of the invention are half face masks that have one or more layers of paper and / or one or more layers of nonwoven fabric and / or one or more layers of fabric to cover a mouth and nose area that are provided with binding or Rubber bands can be fixed at the back of the head or behind the ears of the user.
  • Medical half face masks are also known as surgical masks, medical face masks, clinic masks, surgical face masks or hygiene masks.
  • the makeshift face-to-face masks are also known as community masks, face-to-face masks, everyday masks or makeshift masks.
  • the particle-filtering half masks are also called fine dust masks, dust masks, respirators or FFP masks. Depending on the version, the particle-filtering half masks protect against inhalation of particles and aqueous or oily aerosols.
  • the sensor device makes it possible, together with the sensor device, to count the respiratory processes of the user in the mouth and nose mask when the mouth and nose protection is used and to indicate the need to change the mask after a certain number of breathing processes.
  • using the mouth and nose protection means wearing the mouth and nose protection over the nose and mouth.
  • the sensor unit is set up to detect a signal that has the respiratory rate of the user.
  • a breathing process preferably comprises a single inhalation or a single exhalation or a single breathing cycle.
  • the at least one sensor element is the sensor unit designed as a temperature sensor element or a humidity sensor element or a pressure sensor element or carbon dioxide gas sensor element or a sound transducer sensor element.
  • the temperature sensor element is preferably set up to provide a sensor signal which is representative of a temperature of air that is located between a face surface in the mouth and nose area of the user and the mouth and nose protection.
  • the temperature sensor element enables temperature differences between inhaled air and exhaled air to be recorded and then evaluated.
  • the moisture sensor element is preferably set up to provide a sensor signal which is representative of a humidity of the air that is located between a face surface in the mouth and nose area of the user and the mouth and nose protection.
  • the moisture sensor element enables
  • the pressure sensor element is preferably set up to provide a sensor signal which is representative of an air pressure of the air that is located between a face surface in the mouth and nose region of the user and the mouth and nose protector.
  • the pressure sensor element enables pressure differences in the inhaled and exhaled air to be recorded and then evaluated.
  • the carbon dioxide gas sensor element is preferably set up to provide a sensor signal which is representative of a carbon dioxide concentration of the Air that is located between a face surface in the mouth and nose area of the user and the protective element of the mouth and nose protection.
  • the carbon dioxide gas sensor element enables carbon dioxide concentration differences in the inhaled and exhaled air to be recorded and then evaluated.
  • the sound transducer sensor element which can also be referred to as a microphone, is preferably set up to provide a sensor signal which is representative of a breathing noise and / or a breathing noise of the user of the mouth and nose protection device.
  • the at least one sensor element of the sensor unit is designed as a thermal conductivity sensor element.
  • the thermal conductivity sensor element is preferably set up to provide a sensor signal which is representative of a thermal conductivity of the air that is located between a face surface in the mouth and nose area of the user and the protective element of the mouth and nose protection.
  • the thermal conductivity sensor element enables thermal conductivity differences in the inhaled and exhaled air to be recorded and then evaluated.
  • the sensor unit can have a single sensor element or several, in particular several different, sensor elements that provide corresponding sensor signals.
  • the evaluation of several sensor signals makes it possible to use a correlated occurrence of the corresponding sensor signals in order to make the counting of the respiratory processes more robust against environmental influences.
  • the sensor device has a separating element or a separating element is assigned to the sensor device, the separating element being arranged and set up to separate the sensor element from a skin of the user.
  • the separating element is formed, for example, from a layer of the mask material.
  • the sensor element or the sensor device can be arranged, for example, on a side of the mask that is directed away from the user's face or in an intermediate layer.
  • the sensor device has a housing or an encapsulation which at least partially encloses or at least part of the sensor device, but at least the sensor element, and thus protects it from dirt and damage.
  • the separating element is part of the housing or the encapsulation and forms an outer surface of the housing or the encapsulation.
  • the housing or the encapsulation is arranged here together with the at least one part of the sensor device, for example on one side of the mouth and nose protection which is directed towards the face of the user.
  • the housing or the encapsulation is preferably arranged in such a way that the outer surface, which is formed by the separating element, points in the direction of the user's face.
  • the separating element has at least one opening for a gas or air supply to the at least one sensor element.
  • the at least one opening enables sufficient gas transport.
  • the separating element has a perforation for a gas or air supply to the at least one sensor element. A special configuration of the regular arrangement, quantity, shape and size of the holes in the perforation enable improved gas transport.
  • the sensor unit has a differentiator, the input of which is electrically coupled to an output of the at least one sensor element for receiving a sensor signal from the at least one sensor element.
  • the differentiator is set up to provide an output signal which represents or approximately represents a first derivative of the sensor signal provided by the at least one sensor element.
  • the differentiator preferably comprises a differentiator amplifier or the differentiator is designed as a differentiator amplifier. The differentiator has the advantage that the breathing processes can be reliably detected.
  • the sensor unit has a
  • the data separation circuit is designed to equate the sensor signal with a sliding reference, the sliding reference being derived or determined from an average direct current value of the sensor signal.
  • the data separation circuit has the advantage that the breathing processes can be detected reliably and in an energy-saving manner.
  • the at least one sensor element is spatially separated from the evaluation unit and / or the signaling unit and / or further components of the sensor unit and / or a voltage supply on the mouth and nose protection.
  • the spatially separated arrangement has the advantage that measurement-sensitive elements or units can be optimally positioned in terms of measurement technology, while non-measurement-sensitive elements can be positioned in edge areas in which they do not disturb a user.
  • the mouth and nose protection has a predetermined or specific mask area and at least one sensor element is arranged at a position within the mask area, so that a ratio between a first distance from a center of the mask area to the position of the sensor element and a second distance from a mask edge to the position of the sensor element has a value less than or equal to four.
  • the sensor device has at least one connection device for a releasable mechanical coupling of the sensor device or at least part of the sensor device to the mouth and nose protection.
  • the connecting device comprises, for example, a clamp and / or a clamp and / or a retaining clip and / or a magnetic lock.
  • the Sensor device or a part of the sensor device mechanically fixedly coupled to the mouth and nose protection.
  • the sensor device comprises the signaling unit and the signaling unit is set up to output an optical and / or acoustic and / or haptic signal as a function of the evaluation signal provided by the evaluation unit.
  • the evaluation unit has a wireless interface for wireless transmission of the evaluation signal to a specified terminal.
  • Using an assigned signaling device has the advantage that installation space for the sensor device can be saved. Furthermore, a signaling of a mask status can be kept secret more easily.
  • the sensor device has a voltage supply unit with an accumulator, which is designed as a solid-state accumulator.
  • the sensor device has a charging unit for charging the accumulator.
  • the charging unit has a passive shop connection and / or an energy harvesting unit.
  • the invention is characterized by a mouth and nose protection device which has an mouth and nose protection which is designed as a half face mask and one or more layers of paper and / or one or more layers of material to cover a mouth and nose Having area of a user, and a sensor device according to the first aspect.
  • the sensor device is arranged on the mouth and nose protector.
  • Advantageous configurations of the sensor device according to the first aspect also apply to the mouth and nose protection device according to the second aspect
  • FIG. 1 shows an exemplary embodiment of a mouth and nose protection device
  • FIG. 2 is a schematic block diagram of a monitoring module for the mouth-nose protection device
  • FIG. 3 shows a further exemplary embodiment of a mouth and nose protection device
  • FIG. 4 an exemplary electrical equivalent circuit diagram of a sensor device
  • FIG. 5 shows an exemplary electrical equivalent circuit diagram of a detection unit of the sensor device
  • FIG. 6 shows an exemplary electrical equivalent circuit diagram of a further detection unit of the sensor device
  • Figure 7 shows another exemplary electrical
  • FIG. 8 shows an exemplary profile of the sensor signal
  • FIG. 9 shows a voltage profile at the output of the detection unit shown in FIG. 7 and
  • FIG. 10 a mouth and nose protection with an exemplary arrangement of the sensor device.
  • FIG. 1 shows an exemplary embodiment of a mouth and nose protection device 1.
  • the mouth and nose protection device 1 has an mouth and nose protection device and a sensor device 6.
  • the sensor device 6 can also be referred to as a monitoring module.
  • the mouth and nose protection device 1 optionally has a bar code and / or quick response code (QR code) 8.
  • QR code quick response code
  • the QR code 8 or barcode shown in FIG. 1 can be used, for example, to simplify initialization and activation of the sensor device.
  • the QR code 8 can contain specification data for the mouth and nose protection and / or a product identification, so that a connection can be initiated by scanning the code.
  • the mouth and nose protection is, for example, a medical half face mask.
  • the mouth and nose protection is a makeshift mouth and nose mask or a particle-filtering half face mask.
  • a makeshift full face mask is a tailored piece of cloth that is worn over the chin, mouth and nose. It usually consists of cotton fabric that is sewn in folds or tailored to the shape of the face.
  • the mouth and nose protector in FIG. 1 has a protective element 2 and one or more tie straps or one or more flexible straps, for example rubber bands 4.
  • the protective element 2 has one or more layers of paper and / or one or more layers of fleece and / or one or more layers of fabric and is used to cover a mouth and a nose of a user.
  • the straps enable the protective element 2 to be held in the mouth and nose area.
  • the straps are attached to the back of the head or behind the ears, for example.
  • the protective element 2 is preferably designed in such a way that it covers the nose, the mouth and a chin of a user.
  • FIG. 2 shows a schematic block diagram of a sensor device 6 for the mouth and nose protection device.
  • the sensor device 6 has, for example, a voltage supply unit 61 with a solid-state accumulator.
  • the sensor device 6 comprises a computing unit 62.
  • the sensor device 6, for example, additionally comprises a wireless communication interface 64 and / or a charging unit 66.
  • the computing unit 62 has, for example, a microprocessor or a microcontroller.
  • the computing unit 62 has a timer and / or a counter.
  • the computing unit 62 is designed, for example, to activate the timer as a function of an activation signal provided and, if the timer exceeds a predetermined time limit, to generate and provide a first reminder signal.
  • the computing unit is designed, for example, to increment the counter as a function of a provided counting signal and, if the counter exceeds a predetermined number, to generate a second reminder signal.
  • the wireless communication interface 64 includes, for example, a Bluetooth interface and / or an infrared interface and / or an ultrasound interface.
  • the computing unit is designed to control communication via the wireless communication interface 64.
  • the monitoring module 6 is thus set up, for example, to communicate with a specific terminal, for example a smartphone, an information center, etc., and to send reminder signals and / or reminder messages to the terminal.
  • the monitoring module 6 is designed, for example, to communicate with the terminal connect, referred to as pairing in English. This connection can be used to generate the activation signal for the timer.
  • the voltage supply unit 61 comprises, for example, an accumulator.
  • the accumulator is designed as a solid-state accumulator, for example.
  • the voltage supply can have a charging interface for inductive or wired charging of the accumulator.
  • the battery or the accumulator are preferably designed as a miniaturized component, for example as a surface-mounted component, in English surface-mounted device.
  • the charging unit is used to charge the accumulator.
  • the charging unit includes, for example, a passive shop connector.
  • the passive charging connection can be set up, for example, to connect a universal serial bus cable or comprise a wireless charging film and / or a power converter.
  • the charging unit has, for example, an energy harvesting unit.
  • the accumulator is preferably designed as a surface-mounted component.
  • the sensor device preferably has a single printed circuit board on which all the electronic and electrical components of the sensor device are arranged.
  • the sensor device 6 preferably has a housing or an encapsulation.
  • the housing can be formed by a fluid-tight potting compound.
  • the sensor device comprises, for example, a connecting element which enables a releasable mechanical coupling of the sensor device 6 to the mouth and nose protection.
  • the connecting device comprises, for example, a clamp and / or a clamp and / or a retaining clip and / or a magnetic lock.
  • the sensor device 6 is designed, for example, as a single unit. Alternatively, as shown in FIG. 3, the sensor device 6 comprises a plurality of parts 6a, 6b and is arranged distributed on the mouth and nose protector, one part 6b being arranged in an edge region 9.
  • the spatially separated arrangement has the advantage that measurement-sensitive elements or units can be optimally positioned in terms of measurement technology, while non-measurement-sensitive elements can be positioned in edge areas 9 in which they do not disturb a user.
  • the sensor device 6 has a sensor unit 28 and an evaluation unit 25.
  • the sensor device 6 also has a signaling unit 26, for example.
  • the sensor device 6 also has, for example, a separating element (not shown in FIG. 4) or a separating element is assigned to the sensor device 6, the separating element being arranged and set up, a sensor element 681, 682 of the sensor device 6 from a skin to separate the user.
  • the separating element is formed, for example, from a layer of the mask material.
  • the sensor device 6 has a housing or an encapsulation which encloses or at least part of the sensor device 6 at least partially, but at least the sensor element 681, 682, and thus protects it from dirt and damage.
  • the separating element is, for example, part of the housing or the encapsulation and forms an outer surface of the housing or the encapsulation.
  • the housing or the encapsulation is arranged here together with the at least one part of the sensor device 6, for example on one side of the mouth and nose protection which is directed towards the face of the user.
  • the housing or the encapsulation is preferably arranged in such a way that the outer surface, which is formed by the separating element, points in the direction of the user's face.
  • the separating element has, for example, at least one opening or perforation for a gas or air supply to the at least one sensor element.
  • the separating element is formed from the layer of masking material
  • the sensor device 6 can have a housing or a partial encapsulation.
  • FIG. 4 shows an exemplary electrical equivalent circuit diagram of the sensor device 6.
  • the sensor unit 28 of the sensor device 6 is set up to detect a breath and / or a breath output by a user of the mouth and nose protection device.
  • the sensor unit 28 has a sensor element 681, 682 and a detection unit which, for example, includes a differentiator 23 and a decision circuit 24.
  • the sensor device 6 can have more than one sensor element 681,682, in particular also different sensor elements 681,682 for different measured variables.
  • the sensor device 6 can have a temperature sensor element and / or a pressure sensor element and / or humidity sensor element and / or carbon dioxide gas sensor element and / or a sound transducer sensor element.
  • a thermal conductivity sensor element can also advantageously be used, with the aid of which the thermal conductivity of the air can be detected, since moisture and CO2 occur together when exhaling and both gases reduce the thermal conductivity of the air.
  • Such an arrangement includes, for example, two heated temperature sensors, one of which is encapsulated with respect to the environment and one of which is in contact with the ambient air.
  • the sensor element 681, 682 according to FIG. 4 is, for example, a temperature sensor element.
  • the temperature sensor element includes, for example, an NTC thermistor for short, also called Negative Temperature Coefficient Thermistor.
  • the temperature sensor element is preferably set up to provide a sensor signal which is representative of a temperature of an air which is located between a face surface in the mouth and nose region of the user and the mouth and nose protector.
  • the temperature sensor element is designed for the measuring range between 0 ° C and 30 ° C, for example.
  • the sensor device 6 is designed, for example, to use temperature changes in the range greater than 1K / sec as a trigger for counting an exhalation pulse and / or to use a temperature change in the range greater than -0.5K / sec as a trigger for counting an inhalation pulse.
  • the sensor device 6 When using a moisture sensor element, the sensor device 6 is designed, for example, to use moisture rises above 28.8 g / m3 (this corresponds, for example, to 95% relative humidity at 30 ° C) as a trigger for the breathing process and / or moisture drops of at least approximately 28 g / m3 (this corresponds to 92.2% relative humidity at 30 ° C) to at least approximately below 26g / m3 (this corresponds, for example, to 85.7% relative humidity at 30 ° C) as a trigger for a breathing process.
  • moisture rises above 28.8 g / m3 this corresponds, for example, to 95% relative humidity at 30 ° C
  • moisture drops of at least approximately 28 g / m3 this corresponds to 92.2% relative humidity at 30 ° C
  • 26g / m3 this corresponds, for example, to 85.7% relative humidity at 30 ° C
  • the sensor device 6 When using a carbon dioxide gas sensor element, the sensor device 6 is designed, for example, to use CC ⁇ increases to more than 2% as a trigger for a breathing process or, alternatively or additionally, rates of change in the CO2 concentration of more than 0.25% / sec as a trigger for to use a breathing process. Alternatively or additionally, the sensor device 6 is designed, for example, to use CC ⁇ drops from over 2% to less than 1% as a trigger for the breathing process or, alternatively or additionally, rates of change in the CO2 concentration of less than -0.25% / sec as a trigger for one To use breathing process.
  • the sensor element 681,682 provides a sensor signal at its output.
  • the thermistor forms a voltage divider together with a further ohmic resistor.
  • the voltage divider is connected, for example, between the supply voltage and a reference potential, preferably ground.
  • the sensor signal is tapped, for example, at a node A between the ohmic resistor and the thermistor.
  • the temperature sensor element is set up to detect temperature differences in the inhaled and exhaled air.
  • the thermistor heats up and the resistance of the thermistor changes. This changes a voltage at node A.
  • the sensor signal is fed to the detection unit.
  • the output of the sensor element for example node A of the voltage divider in FIG. 4, is coupled to an input of a differentiator 23.
  • the differentiator 23 comprises, for example, a differentiator amplifier.
  • the differentiator amplifier preferably has an operational amplifier.
  • a first input of the operational amplifier is electrically coupled to a reference potential, for example ground.
  • the differentiator amplifier has an ohmic feedback resistor which is connected between an output of the operational amplifier and a second input of the operational amplifier.
  • the differentiator amplifier has a capacitance which is connected between the input of the differentiator 23 and the input of the operational amplifier.
  • the voltage change in node A is passed through the capacitor to the second input of the operational amplifier. By connecting the capacitor, the actual voltage curve at the node is not passed on to the operational amplifier, but only the change in voltage.
  • the differentiator amplifier thus has the advantage that no basic setting of a zero point or an adjustment of the operational amplifier is required.
  • a dimensioning of the capacitor and the feedback resistor determines or significantly influences a sensitivity of the differentiator 23 and can be adapted to application requirements.
  • An output of the differentiator 23 is, for example, electrically coupled to the decision circuit 24.
  • the decision circuit 24 has, for example, a threshold value decision maker, a comparator or a Schmitt trigger.
  • An output signal is available at the output of the differentiator 23 which represents at least approximately a first derivative of the voltage profile in node A.
  • the decision circuit 24 is designed, for example, when the output signal of the differentiator 23 exceeds a predetermined threshold value, to output a signal that represents a first binary value, for example the value 1, and when the output signal of the differentiator 23 exceeds or equal to the predetermined threshold value specified threshold amount is to output a signal that represents a second binary value, for example the value 0, to output.
  • a detection signal that represents the detected respiratory processes is thus available at the output of the sensor unit 28.
  • the evaluation unit 25 is set up to count the user's breathing processes as a function of the detection signal provided by the sensor unit 28 and to provide an evaluation signal for a signaling unit 26 as a function of a determined number of breathing processes.
  • the evaluation unit 25 has, for example, a counter and / or a shift Register and / or a microcontroller.
  • the sensor device 6 has, for example, a signaling unit 26.
  • the signaling unit comprises an LED.
  • the evaluation unit 25 has, for example, at least a first limit value for a number of breathing processes and if a count value of the counter exceeds this first limit value, a first evaluation signal is output.
  • the first evaluation signal has the effect, for example, that the light-emitting diode of the signaling unit 26 is activated or switched off, thus signaling that the first limit value has been reached.
  • the evaluation unit it is possible for the evaluation unit to have several limit values for the number of breathing processes.
  • a traffic light system can be implemented and the user not only receives the information that the oral Nose protection is to be changed, but he can also receive the information that only a certain number of breathing processes remain until the mouth and nose protection is to be changed.
  • FIG. 5 shows a further exemplary embodiment of the differentiator 23.
  • the evaluation unit 25 and the signaling unit 26 are not shown.
  • the decision circuit 24 is designed as a Schmitt trigger in this case.
  • the differentiator 23 shown in FIG. 5 comprises a feedback capacitance C2, which is connected in parallel to the feedback resistor RI. This enables additional attenuation of higher frequency components. A positive input from the
  • the operational amplifier is based on a further reference potential, for example half the supply voltage.
  • a voltage divider is used for this, for example, which has the resistors R2 and R3.
  • the reference to the further reference potential leads to the output signal U1 having an offset in the operational amplifier of the differentiator. Since the differential quotient can be positive and negative, a differentiator based on ground would only show positive increases, negative ones would be below ground.
  • the decision circuit 24 has a further operational amplifier.
  • the operational amplifier is wired with a further voltage divider and a feedback resistor RIO and works as an inverting Schmitt trigger.
  • the further voltage divider specifies a level around which the further operational amplifier works quasi as a comparator.
  • FIG. 6 shows a further exemplary embodiment of the differentiator 33. In comparison to the exemplary embodiment shown in FIG low-pass filters the signal.
  • FIG. 7 shows a further exemplary embodiment for the detection unit of the sensor device 6.
  • the data separation circuit 44 is, for example, electrically coupled on the input side to the output of the sensor element 28 and on the output side to the evaluation unit 25.
  • a data slicing circuit 44 is designed to equate an input signal of the data slicing circuit 44 with a floating reference which is derived from the average direct current value of the input signal of the data slicing circuit 44.
  • a low-pass filter for example, is used to derive the sliding reference.
  • An input of the data separation circuit 44 of the sensor device 6 is electrically coupled to an output of the at least one sensor element 28 for receiving the sensor signal.
  • the data separation circuit 44 is designed to equate the sensor signal with a sliding reference, the sliding reference being derived or determined from an average direct current value of the sensor signal.
  • the data separation circuit 44 comprises a first low-pass filter and a second low-pass filter.
  • the low-pass filters each have, for example, an RC filter element with different time constants. The large time constant forms the mean value, the small time constant or the filter with a smaller capacitance is only used to filter the signal so that possible noise or other interfering signals are filtered out.
  • the data separation circuit 44 has, for example, an operational amplifier which is wired as a comparator.
  • the data separation circuit 44 has the essential advantage that fewer components are required and the data separation circuit can be operated with significantly lower losses than the differentiator 23, as shown in FIG. 5 or 6, for example.
  • FIG. 8 shows an exemplary curve V_A of the sensor signal over several breathing cycles.
  • the sensor signal is represented by the voltage drop across resistor R3 (see FIG. 7), which for example represents the resistance of the thermistor.
  • FIG. 9 shows an associated voltage profile V_U1 at the output U1 of the data separation circuit 44. It can be seen that the data separation circuit 44 provides a very precise digital signal which represents the respective breathing cycles.
  • FIG. 10 shows a mouth and nose protector with an exemplary arrangement of the sensor device 6.
  • the mouth and nose protector has a predetermined mask area F.
  • At least the sensor element 28 or at least one of the sensor elements 28 is preferably arranged at a position P within the mask area, so that a ratio between a first distance RI from a center of the mask area to the position P of the sensor element and a second distance R2 from a mask edge to the position P. of the sensor element has a value less than or equal to four.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Pulmonology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

La présente invention concerne un dispositif de capteur (6) conçu pour être disposé sur un dispositif de protection de la bouche et du nez. Le dispositif de protection de bouche et de nez est conçu ici comme un demi-masque pour le visage et comporte une ou plusieurs couches de papier et/ou une ou plusieurs couches de matériau pour recouvrir la zone de la bouche et du nez d'un utilisateur. Le dispositif de détection (6) comprend une unité de détection comportant au moins un élément de détection. L'unité de capteur est configurée pour détecter des respirations individuelles d'un utilisateur lorsque le dispositif de protection de bouche et du nez est utilisé conjointement avec le dispositif de capteur (6) par l'utilisateur. Le dispositif de détection (6) comporte en outre une unité d'évaluation (25). L'unité d'évaluation (25) comprend un compteur et est configurée pour compter les respirations de l'utilisateur sur la base d'un signal de détection fourni par l'unité de capteur. L'unité d'évaluation (25) est en outre configurée pour fournir un signal d'évaluation pour une unité de signalisation (26) sur la base d'un nombre déterminé de respirations.
EP21723983.9A 2020-05-07 2021-05-06 Dispositif de capteur pour un dispositif de protection de la bouche et du nez, et dispositif de protection de la bouche et du nez Withdrawn EP4146353A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020112450.3A DE102020112450B4 (de) 2020-05-07 2020-05-07 Überwachungsmodul für einen Mund-Nasen-Schutz und Mund-Nasen-Schutzvorrichtung
DE102020112448 2020-05-07
PCT/EP2021/062035 WO2021224410A1 (fr) 2020-05-07 2021-05-06 Dispositif de capteur pour un dispositif de protection de la bouche et du nez, et dispositif de protection de la bouche et du nez

Publications (1)

Publication Number Publication Date
EP4146353A1 true EP4146353A1 (fr) 2023-03-15

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EP21723983.9A Withdrawn EP4146353A1 (fr) 2020-05-07 2021-05-06 Dispositif de capteur pour un dispositif de protection de la bouche et du nez, et dispositif de protection de la bouche et du nez

Country Status (4)

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US (1) US20230116663A1 (fr)
EP (1) EP4146353A1 (fr)
CN (1) CN115485034A (fr)
WO (1) WO2021224410A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230292856A1 (en) * 2022-03-17 2023-09-21 Change Healthcare Holdings, Llc Face mask with moisture level and oxygen saturation detection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8374744B2 (en) * 2006-10-02 2013-02-12 Lear Corporation Tire pressure monitor signal processing
US10561863B1 (en) * 2012-04-06 2020-02-18 Orbital Research Inc. Biometric and environmental monitoring and control system
GB2540444B (en) * 2015-12-07 2017-11-29 Dobbing Christopher Respirator mask management system
CN107874337A (zh) * 2017-11-25 2018-04-06 蒋鹏宇 一种防雾霾口罩
KR102219840B1 (ko) * 2018-02-05 2021-02-24 비클시스템 주식회사 사용자의 호흡패턴을 감지하는 전자 마스크 및 이를 이용한 헬스 케어 시스템
EP3685810A1 (fr) * 2019-01-23 2020-07-29 Dermapharm AG Dispositif mobile de traitement de démangeaisons pourvu d'interface
DE102019130162A1 (de) * 2019-11-08 2021-05-12 Wto Vermögensverwaltung Gmbh Werkzeughalter mit mindestens einem Sensor

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WO2021224410A1 (fr) 2021-11-11
US20230116663A1 (en) 2023-04-13
CN115485034A (zh) 2022-12-16

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