JPWO2021004963A5

JPWO2021004963A5 -

Info

Publication number: JPWO2021004963A5
Application number: JP2021571950A
Authority: JP
Publication date: 2023-05-19

Claims

said outer wall for defining an air chamber between the outer wall and the user's face when the mask is worn;
a filter forming a boundary between the air chamber and the ambient environment outside the air chamber;
detection circuitry for detecting the inspiratory and expiratory portions of the user's breathing cycle;
a particle or contamination sensor for sensing within said air chamber and providing a sensing result;
A contamination mask comprising a timer and a controller, the controller comprising:
The timer is used to measure the combined duration of multiple inspiratory segments to obtain a single combined inspiratory sensing result of a target combined duration without obtaining inspiratory sensing results for individual inspiratory segments. combining the sensing results for the plurality of inhalation segments from the sensing circuit and /or using the timer to measure the combined duration of the plurality of exhalation segments to obtain sufficient data to obtain , the plurality of Combining detection results for the expiratory portion of
A mask for contamination, adapted to

2. A contamination mask according to claim 1, further comprising a fan for drawing air from outside the air chamber into the air chamber and/or for drawing air from inside the air chamber to the outside of the air chamber.

3. A pollution mask according to claim 1 or 2, wherein the detection circuit is a circuit for detecting inspiratory and expiratory portions based on the pressure within the air chamber.

The detection circuit is
a pressure sensor or means for determining the rotational speed of the fan so that the speed of the fan is used as a proxy for the pressure measurement, and from the rotational speed of the fan the pressure between the air chamber and the ambient environment is obtained. 4. A pollution mask according to claim 3, having a controller adapted to:

The controller is
collecting sensing results continuously during a plurality of respiratory cycles; and creating subsets of sensing results for the plurality of inspiratory segments to obtain combined inspiratory sensing results; 5. A pollution mask according to any one of claims 1 to 4 adapted to create subsets and obtain combined breath detection results.

The controller is
performing sensing at selected times corresponding to the plurality of inhalation segments to obtain a combined inhalation sensing result; and/or performing sensing at selected times corresponding to the plurality of exhalation segments to obtain a combined exhalation sensing result. 5. A contamination mask according to any one of the preceding claims, adapted to obtain a

The controller is
performing a lower pressure threshold, wherein an inspiratory portion below said lower pressure threshold is identified; and/or performing an upper pressure threshold, wherein an expiratory portion above said upper pressure threshold is identified. 7. A contamination mask according to any one of claims 1 to 6, adapted to be worn.

said lower and/or upper pressure threshold is set depending on breathing rate, or said lower and/or upper pressure threshold is the pressure in said air chamber during preceding inspiration and/or expiration portions dynamically adapt based on the
A contamination mask according to claim 7 .

9. A contamination mask according to any preceding claim, wherein the particle or contamination sensor comprises a sensor based on light scattering.

10. A contamination mask according to any preceding claim, wherein the filter comprises an outer wall of the air chamber.

A method for measuring particle or contamination levels in an air chamber of a contamination mask comprising the steps of:
detecting the inspiratory and expiratory portions of the user's breathing cycle;
sensing the level of particles or contamination in the air chamber of the mask; and measuring the combined duration of multiple inspiration segments to achieve a target combined duration without obtaining an inspiration sensing result for each individual inspiration segment. and/or measuring the combined duration of the multiple exhalation segments to obtain sufficient data to obtain a single combined inspiration sensing result of , sensing for the plurality of exhalation segments to obtain sufficient data to obtain a single combined exhalation detection result of a target combined duration without obtaining exhalation detection results for individual exhalation segments. A method comprising the step of combining results.

continuously collecting sensing results during a plurality of respiratory cycles; and creating a subset of sensing results for the plurality of inspiration segments to obtain a combined inspiration sensing result; and/or
12. The method of claim 11, comprising creating a subset of detection results for the plurality of breath portions to obtain a combined breath detection result.

performing sensing at selected times corresponding to said plurality of inspiratory segments and obtaining combined inspiration sensing results; and/or performing sensing at selected times corresponding to said plurality of exhalation segments and obtaining combined exhalation sensing. 12. The method of claim 11, comprising obtaining a result.

performing a lower pressure threshold, wherein an inspiration portion below said lower pressure threshold is identified; and/or performing an upper pressure threshold, wherein an expiration portion above said upper pressure threshold is identified. 14. A method according to any one of claims 11 to 13, comprising identified steps.

said lower and/or upper pressure threshold is set depending on breathing rate, or said lower and/or upper pressure threshold is the pressure in said air chamber during preceding inspiration and/or expiration portions dynamically adapt based on the
15. The method of claim 14.