Breath monitor
First Claim
Patent Images
1. A breath monitor comprising:
- a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; and
breath signal computation means,wherein the sensors are adapted to be disposed under the human with a predetermined arrangement,wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, andwherein the breath signal computation means selects the sensors in such a manner that a peak frequency in the spectrum of each sensor signal is determined, a maximum frequency range having a predetermined frequency width, in which the largest number of peak frequencies of the sensor signals are disposed, is determined, and the sensor signals having the peak frequency disposed in the maximum frequency range are selected.
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Abstract
A breath monitor includes: a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; and breath signal computation means. The sensors are disposed under the human with a predetermined arrangement. The breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors.
58 Citations
40 Claims
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1. A breath monitor comprising:
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a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; and breath signal computation means, wherein the sensors are adapted to be disposed under the human with a predetermined arrangement, wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, and wherein the breath signal computation means selects the sensors in such a manner that a peak frequency in the spectrum of each sensor signal is determined, a maximum frequency range having a predetermined frequency width, in which the largest number of peak frequencies of the sensor signals are disposed, is determined, and the sensor signals having the peak frequency disposed in the maximum frequency range are selected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A breath monitor comprising:
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a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; breath signal computation means; and determination means for determining a quick movement of the human, wherein the sensors are adapted to be disposed under the human with a predetermined arrangement, wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, wherein the breath signal includes a plurality of cycles, the number of which is predetermined, and each of which corresponds to one cycle of breathing of the human, and wherein the determination means arbitrarily selects one cycle of the breath signal, compares an amplitude of the one cycle of the breath signal to an amplitude of another cycle of the breath signal, and determines the quick movement when the amplitude of the one cycle is larger by a predetermined reference value than the amplitude of the other cycle.
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10. A breath monitor comprising:
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a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; breath signal computation means; and determination means for determining a slight movement of the human, wherein the sensors are adapted to be disposed under the human with a predetermined arrangement, wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, wherein the breath signal computation means converts the sensor signals, each of which has a signal intensity larger than a predetermined value so that the sensor signal only derived from the load of the human is selected, wherein the determination means determines the number of the sensor signals having the signal intensity larger than the predetermined value, and wherein the determination means determines the slight movement when the number of the sensor signals changes by a predetermined number as time advances.
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11. A breath monitor comprising:
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a plurality of sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; and breath signal computation means, wherein the sensors are adapted to be disposed under the human with a predetermined arrangement, wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, and wherein the breath signal computation means computes the breath signal by using only the sensor signals having a peak frequency in the spectrum disposed in a breath frequency range.
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12. A breath monitor comprising:
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a plurality off sensors for detecting a load derived from a human lying on a bed and for outputting a sensor signal corresponding to the load; breath signal computation means; a resistance branch circuit having a sensitivity resistor; and a switch for switching a connection between the resistance branch circuit and the sensor, wherein the sensors are adapted to be disposed under the human with a predetermined arrangement, wherein the breath signal computation means converts each sensor signal to a frequency domain so that a spectrum of each sensor signal is obtained, selects the sensors on the basis of the converted sensor signals, and computes a breath signal on the basis of the sensor signals outputted from the selected sensors, and wherein each sensor includes the resistance branch circuit. - View Dependent Claims (13)
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14. Detection equipment for detecting an apnea syndrome, comprising:
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breath signal computation means for computing a breath signal on the basis of a change of a load, which corresponds to a body movement of breathing of a person; and determination means for determining an apnea symptom and a hypopnea symptom of the person on the basis of a periodicity of extremums of an amplitude envelope curve of the breath signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification