Patent ID: 6932774

Claim:
A respiratory monitoring system, comprising: a plurality of sensors that produces weight signals corresponding to forces applied by a person under respiratory monitoring during sleep; a respiratory signal producing means that produces a respiratory signal representing respiratory conditions of the person based on the weight signals; a sensor selection control means that outputs switching signals; a sensor selecting means that selects sensors based on the switching signals; a signal converting means that converts weight signals outputted from the sensors that are selected by the sensor selecting means to digital signals; a signal strength determining means that determines a signal strength in a respiration frequency band corresponding to the respiratory body movement and a signal strength in another frequency band; a signal strength comparing means that compares the signal strength in the respiration frequency band with the signal strength in the other frequency band; a signal selecting means that selects weight signals having a signal strength in the respiratory frequency band with a predetermined ratio to the signal strength in the other frequency band; and a target sensor selecting means that selects the sensors outputting the signal selected by the signal selecting means, wherein the respiratory signal producing means produces the respiratory signal based on the weight signals outputted from the sensors that are selected by the target sensor selecting means.