System That Measures Different States of a Subject

Abstract

An analysis system includes a storage unit and a processing unit. The processing unit quantifies the brain state on the basis of occurrence frequencies of the duration included in a plurality of regions each of which has a predefined range within which the duration falls. The calculated brain index is calculated by the processing unit using coefficients.

1 . An analysis system that analyzes a state of a person, the analysis system comprising:
 a storage unit that stores time-series data and a threshold of the acceleration; and   a processing unit that: i) determines whether each value contained in the time series data is in a first state in which the value is equal to or greater than the threshold or in a second state in which the value is less than the threshold, ii) determines a duration which is a period of time during which the first state continues, and iii) quantifies a brain state of the person on the basis of the duration, and iv) calculates a brain index based on the brain state, wherein
 the processing unit quantifies the brain state on the basis of occurrence frequencies of the duration included in a plurality of regions each of which has a predefined range within which the duration falls, 
 the plurality of regions includes a first region having a first range within which the duration falls and a second region having a second range within which the duration falls, 
 an upper limit of the second range is larger than an upper limit of the first range, 
 the brain state is quantified by calculating a sum of a first term that includes a first occurrence frequency that is an occurrence frequency of the duration included within the first region and a second term that includes a second occurrence frequency that is the occurrence frequency of the duration included within the second region, and 
 the calculated brain index is calculated by the processing unit using coefficients. 
   
     
     
         2 . The analysis system according to  claim 1 ,
 wherein the processing unit quantifies the brain state on the basis of the occurrence frequencies of the duration included in a plurality of regions each of which has a predefined range within which the duration falls.   
     
     
         3 . The analysis system according to  claim 2 ,
 wherein the plurality of regions includes a first region having a first range within which the duration falls and a second region having a second range within which the duration falls, and   the upper limit of the second range is larger than the upper limit of the first range.   
     
     
         4 . The analysis system according to  claim 3 ,
 wherein the brain state is quantified by calculating the sum of a first term that includes a first occurrence frequency that is the occurrence frequency of the duration included within the first region and a second term that includes a second occurrence frequency that is the occurrence frequency of the duration included within the second region.   
     
     
         5 . The analysis system according to  claim 4 ,
 wherein the brain state is quantified by calculating the sum of two terms, one of which has a negative coefficient and the other of which has a positive coefficient.   
     
     
         6 . The analysis system according to  claim 1 ,
 wherein the occurrence frequencies of the duration included in a certain region which has a predefined range within which the duration falls, or the value of the quantified brain state.   
     
     
         7 . The analysis system according to  claim 6 ,
 wherein the region includes a first region having a first range within which the duration falls and a second region having a second range within which the duration falls,   the processing unit quantifies the brain state by calculating the sum of a first term including a first occurrence frequency that is the occurrence frequency of the duration falling within the first region and a second term including a second occurrence frequency that is the occurrence frequency of the duration falling within the second region, and   the display unit displays the first occurrence frequency and the second occurrence frequency.   
     
     
         8 . The analysis system according to  claim 7 ,
 wherein the upper limit of the second range is larger than the upper limit of the first range.   
     
     
         9 . The analysis system according to  claim 1 , further comprising:
 an external sensor that measures information regarding circumstances in which the person resides; an external instrument that changes the sensor information; and   an application server,   wherein the application server executes analyzes the correlation between the quantified brain state and the sensor information, and causes the external instrument to change the sensor information based on the result of the correlation analysis so that the value of the brain state is increased.