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US 10,881,331 B2Granted
Respiratory monitoring apparatus, method and device
AssigneesShenzhen Mindray Bio-Medical Electronics Co., Ltd., Shenzhen Mindray Scientific Co., Ltd.
InventorsWenhan Yu, Hui Yu
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Abstract
A respiratory monitoring apparatus comprises at least one motion sensor and a processing device. The at least one motion sensor senses an angular motion of a measured part capable of indicating a respiratory motion, and outputs an angular velocity vector of the measured part; the processing device, connected to the motion sensor, extracts a respiratory angular velocity from the angular velocity vector, and acquires a respiratory wave according to the respiratory angular velocity.
Claims12
A respiratory monitoring apparatus, comprising:
- at least one motion sensor for at least sensing an angular motion of a measured part capable of indicating respiratory motion, and outputting an angular velocity vector of the measured part;
- a processing device, connected to the motion sensor, for extracting a respiratory angular velocity from the angular velocity vector, and acquiring a respiratory wave according to the respiratory angular velocity;
- and
- a display coupled to the processing device for displaying the respiratory wave;
- and
- wherein the at least one motion sensor comprises two motion sensors for measuring the respective angular motion at a left costal arch and a right costal arch;
- and
- wherein, when a sensitive axis of each motion sensor is placed along a given direction, the processing device extracts the respiratory angular velocity from the angular velocity vector using the following formula:
- ωRAa=(I3+Cba)−1(ωa−Cbaωb)
- wherein ωa is an angular velocity vector outputted by one motion sensor, ωb is an angular velocity vector outputted by the other motion sensor, ωRAa is a respiratory angular velocity sensed by one motion sensor, Cba is an attitude transformation matrix from a coordinate system of one motion sensor to a coordinate system of the other motion sensor, I3 is a three-dimensional identity matrix;
- and each corresponding given direction causes the sensitive axis of a corresponding motion sensor to be parallel to and in the same direction as the angular velocity vector sensed by the corresponding motion sensor.
8 more elements
A respiratory monitoring method, comprising:
- using at least one motion sensor to sense an angular motion of a measured part capable of indicating respiratory motion, and output an angular velocity vector of the measured part;
- extracting a respiratory angular velocity from the angular velocity vector, and acquiring a respiratory wave according to the respiratory angular velocity;
- and
- displaying the respiratory wave;
- wherein the at least one motion sensor comprises two motion sensors for measuring the respective angular motion at a left costal arch and a right costal arch;
- and
- wherein when a sensitive axis of each motion sensor is placed long a given direction, extracting the respiratory angular velocity from the angular velocity vector using the following formula:
- ωRAa=(I3+Cba)−1(ωa−Cbaωb)
- where ωa is an angular velocity vector outputted by one motion sensor, ωb is an angular velocity vector outputted by the other motion sensor, ωRAa is a respiratory angular velocity sensed by one motion sensor, Cba is an attitude transformation matrix from a coordinate system of one motion sensor to a coordinate system of the other motion sensor, I3 is a three-dimensional identity matrix;
- and each corresponding given direction causes the sensitive axis of a corresponding motion sensor to be parallel to and in the same direction as the angular velocity vector sensed by the corresponding motion sensor.
7 more elements
A respiratory monitoring device, comprising:
- a microprocessor for receiving an angular velocity vector of a measured part on a measured object outputted by a motion sensor, wherein the angular velocity vector is outputted after the motion sensor senses an angular motion of the measured part capable of indicating respiratory motion;
- and
- wherein the microprocessor extracts a respiratory angular velocity from the angular velocity vector, and acquires a respiratory wave according to the respiratory angular velocity;
- and
- a display coupled to the microprocessor for displaying the respiratory wave;
- wherein the respiratory angular velocity is extracted from angular velocity vectors outputted by two motion sensors, wherein the angular velocity vectors outputted by the two motion sensors are angular velocity vectors of the respective angular motion at a left costal arch and a right costal arch of the measured object;
- and
- wherein a sensitive axis of each motion sensor is placed along a corresponding given direction, the microprocessor extracts the respiratory angular velocity from the angular velocity vectors using the following formula:
- ωRAa=(I3+Cba)−1(ωa−Cbaωb)
- wherein ωa is an angular velocity vector outputted by one motion sensor, ωb is an angular velocity vector outputted by the other motion sensor, ωRAa is a respiratory angular velocity sensed by one motion sensor, Cba is an attitude transformation matrix from a coordinate system of one motion sensor to a coordinate system of the other motion sensor, I3 is a three-dimensional identity matrix;
- and each corresponding given direction causes the sensitive axis of a corresponding motion sensor to be parallel to and in the same direction as the angular velocity vector sensed by the corresponding motion sensor.
8 more elements
Dependencies are inferred from the claim text.