| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gain control device capable of constantly performing a normal gain control with respect to a biosignal even if a body movement is generated. <P>SOLUTION: This gain control device 1 for controlling a gain when amplifying an output signal from a sensor 2 outputting biosignals caused by the heart beats, respiration and the like of a person by converting them into electric signals, includes an output detection section 10 for detecting an amplitude of the output signal from the sensor 2, a gain determination section 11 for determining the gain according to the detection result of the output detection section 10, a gain control section 12 controlling the gain of the signal output to a biosignal extraction device 3 which extracts vibration components by the body movement, heart beat, respiration and the like according to the gain determined by the gain determination section 11, and the body movement detection section 13 for detecting a body movement whose amplitude is fluctuated beyond a predetermined range compared with a time of complete rest, wherein the gain determination section 11 determines no gain while at least the body movement is detected by the body movement detection section 13. <P>COPYRIGHT: (C)2009,JPO&INPIT |
