Method and apparatus for testing vital capacity
The present application discloses a method and apparatus for testing vital capacity. The method comprises: measuring a static pressure P 0 of a pressure hole inner cavity of a mobile device; wherein the pressure hole is communication with the exterior and is purposely disposed on the mobile device or is an already-designed opening; obtaining an air pressure P(t) at each moment by blowing air towards the pressure hole; obtaining an air flow speed v(t) corresponding to each moment according to a correspondence relation formula between the air flow speed v(t) and a pressure differential P(t)−P 0 ; and obtaining vital capacity Vc of the subject according to a correspondence relationship between a measurement time t and the air flow speed v(t).
1. A method for testing vital capacity, wherein the method comprises:
measuring a static pressure P 0 of a pressure hole inner cavity of a mobile device; wherein the pressure hole is communicated with an exterior and is purposely disposed on the mobile device or is an already-designed opening;
obtaining an air pressure P(t) at each moment by blowing air towards the pressure hole;
obtaining an air flow speed v(t) corresponding to each moment according to a correspondence relation formula between the air flow speed v(t) and a pressure differential P(t)−P 0 ; and
obtaining vital capacity Vc of the subject according to a correspondence relationship between a measurement time t and the air flow speed v(t);
wherein the mobile device comprises a mobile phone or a wearable device.
2. The method for testing vital capacity according to claim 1 , wherein, the obtaining an air flow speed v(t) corresponding to each moment according to a correspondence relation formula between the air flow speed v(t) and a pressure differential P(t)−P 0 comprises:
obtaining the air flow speed v(t) at the current moment according to a formula
v
(
t
)
=
2
(
P
(
t
)
-
P
0
)
ρ
,
wherein ρ is air density.
3. The method for testing vital capacity according to claim 1 , wherein, the obtaining vital capacity Vc of the subject according to a correspondence relationship between a measurement time t and the air flow speed v(t) comprises:
obtaining the vital capacity Vc of the subject according to a formula
Vc
=
s
∫
0
t
t
·
v
(
t
)
d
t
,
wherein s is a cross section of the pressure hole inner cavity.
4. The method for testing vital capacity according to claim 1 , wherein the obtaining the vital capacity Vc of the subject according to a correspondence relationship between a measurement time t and the air flow speed v(t) comprises:
obtaining the vital capacity Vc of the subject according to a formula
Vc
=
t
·
s
2
(
P
max
-
P
0
)
ρ
,
wherein ρ is air density, P max is a maximum air pressure value obtained within the measurement time t, and s is a cross section of the pressure hole inner cavity.
5. A testing apparatus for vital capacity, wherein the apparatus comprises:
a pressure sensor disposed in a pressure hole inner cavity of the testing apparatus, wherein the pressure hole is communicated with an exterior and is purposely disposed on the testing apparatus or is an already-designed opening, and configured to obtain an air pressure P(t) at each moment by blowing air towards the pressure hole; and
a vital capacity obtaining unit configured to obtain an air flow speed v(t) corresponding to each moment according to a correspondence relation formula between the air flow speed v(t) and a pressure differential P(t)−P 0 , and obtain vital capacity Vc of the subject according to a correspondence relationship between a measurement time t and the air flow speed v(t), wherein P 0 is a static pressure of the pressure hole inner cavity of the testing apparatus;
wherein the testing apparatus for vital capacity is disposed in a mobile device, and the mobile device comprises a mobile phone or a wearable device.
6. The testing apparatus for vital capacity according to claim 5 , wherein the vital capacity obtaining unit comprises:
an air flow speed obtaining module configured to obtain the air flow speed v(t) at the current moment according to a formula
v
(
t
)
=
2
(
P
(
t
)
-
P
0
)
ρ
,
wherein ρ is air density.
7. The testing apparatus for vital capacity according to claim 5 , wherein the vital capacity obtaining unit is specifically used to,
obtain the vital capacity Vc of the subject according to a formula
Vc
=
s
∫
0
t
t
·
v
(
t
)
d
t
,
wherein s is a cross section of the pressure hole inner cavity.
8. The testing apparatus for vital capacity according to claim 5 , wherein the vital capacity obtaining unit is specifically used to,
obtain the vital capacity Vc of the subject according to a formula
Vc
=
t
·
s
2
(
P
max
-
P
0
)
ρ
,
wherein ρ is air density, P max is a maximum air pressure value obtained within the measurement time t, and s is a cross section of the pressure hole inner cavity.