Respiratory monitors and monitoring methods
First Claim
1. A respiratory monitor comprising:
- a sensor configured to generate a sensor signal indicative of both respiration-related motion and respiration-related sound, the sensor including;
a single accelerometer configured for attachment to a respiring subject and measuring an acceleration A=G·
cos(φ
) where A is the acceleration measured by the accelerometer, G is the magnitude of the gravitation vector, and φ
is an orientation angle of the accelerometer,a magnetometer coupled with the accelerometer such that the accelerometer and the magnetometer have a common orientation; and
a signal processor configured to generate the sensor signal based on the acceleration measured by the accelerometer and a magnetometer signal output by the magnetometer;
a first filter configured to generate a respiration-related motion monitoring signal indicative of respiration-related motion by extracting from the sensor signal a low frequency signal encompassing frequencies of respiration-related motion;
a second filter configured to generate a sound monitoring signal indicative of respiration-related sound by extracting from the sensor signal a high frequency signal encompassing frequencies of respiration-related sound, the respiration-related sound monitoring signal being based on the high frequency signal; and
a signals synthesizer configured to synthesize a respiratory monitor signal by combining the respiration-related motion monitoring signal and the respiration-related sound monitoring signal to form the respiratory monitor signal.
1 Assignment
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Accused Products
Abstract
A respiratory monitor comprises: a first sensor (20, 70) configured to generate a respiration-related motion monitoring signal (72) indicative of respiration related motion; a second sensor (20, 22, 80, 82) configured to generate a sound monitoring signal (84) indicative of respiration-related sound; and a signals synthesizer (90) configured to synthesize a respiratory monitor signal (46) based on the respiration-related motion monitoring signal and the respiration-related sound monitoring signal. A sensor for use in respiratory monitoring comprises an accelerometer (30) and a magnetometer (32) together defining a unitary sensor (20) configured for attachment to a respiring subject (10) so as to move as a unit responsive to respiration related motion of the respiring subject.
16 Citations
11 Claims
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1. A respiratory monitor comprising:
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a sensor configured to generate a sensor signal indicative of both respiration-related motion and respiration-related sound, the sensor including; a single accelerometer configured for attachment to a respiring subject and measuring an acceleration A=G·
cos(φ
) where A is the acceleration measured by the accelerometer, G is the magnitude of the gravitation vector, and φ
is an orientation angle of the accelerometer,a magnetometer coupled with the accelerometer such that the accelerometer and the magnetometer have a common orientation; and a signal processor configured to generate the sensor signal based on the acceleration measured by the accelerometer and a magnetometer signal output by the magnetometer; a first filter configured to generate a respiration-related motion monitoring signal indicative of respiration-related motion by extracting from the sensor signal a low frequency signal encompassing frequencies of respiration-related motion; a second filter configured to generate a sound monitoring signal indicative of respiration-related sound by extracting from the sensor signal a high frequency signal encompassing frequencies of respiration-related sound, the respiration-related sound monitoring signal being based on the high frequency signal; and a signals synthesizer configured to synthesize a respiratory monitor signal by combining the respiration-related motion monitoring signal and the respiration-related sound monitoring signal to form the respiratory monitor signal. - View Dependent Claims (2, 3, 4)
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5. A sensor for use in respiratory monitoring, the sensor comprising:
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an accelerometer; a magnetometer defining together with the accelerometer a unitary sensor configured for attachment to a respiring subject so as to move as a unit responsive to respiration-related motion of the respiring subject; and a signal processor configured to generate a respiratory monitor signal based on a single signal comprising change as a function of time of the angle of a three degrees of freedom (3 DOF) rotation of the unitary sensor computed from an accelerometer signal output by the accelerometer and a magnetometer signal output by the magnetometer. - View Dependent Claims (6, 7, 8, 9)
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10. A sensor for use in respiratory monitoring, the sensor comprising:
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a single accelerometer measuring an acceleration A=G·
cos(φ
) where A is the acceleration measured by the accelerometer, G is the magnitude of the gravitation vector, and φ
is an orientation angle of the accelerometer;a single magnetometer defining together with the single accelerometer a unitary sensor configured for attachment to a respiring subject so as to move as a unit responsive to respiration-related motion of the respiring subject; and a signal processor configured to generate a respiratory monitor signal based on change as a function of time of the angle of a three degrees of freedom (3 DOF) rotation of the unitary sensor computed from the acceleration measured by the single accelerometer and a magnetometer signal output by the single magnetometer. - View Dependent Claims (11)
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Specification