Activity amount calculation system, activity amount calculation device, activity amount calculation method, and computer-readable recording medium

1. A computer configured as an activity amount calculation device for calculating activity amounts of a resident of a dwelling equipped with a plurality of rooms, the activity amount calculation device comprising:

a calculation unit configured to calculate activity amounts of the resident based on detection signals output from a plurality of detection devices that detect the resident when the resident passes through doorways of the plurality of rooms; and

a summation unit configured to repeatedly calculate a total activity amount of the resident in a predetermined period by summing the activity amounts calculated by the calculation unit, wherein

upon detection of the resident by different detection devices included among the plurality of detection devices, the calculation unit calculates an activity amount of the resident based on a preset relationship between the different detection devices and a reference activity amount, wherein

the calculation unit uses the reference activity amount as the activity amount of the resident when an elapsed period between detection by one of the different detection devices that has detected first and detection by another of the different detection devices that has detected second is longer than or equal to a preset reference period, and

the calculation unit uses a product of the reference activity amount and a coefficient larger than one as the activity amount of the resident when the elapsed period is shorter than the reference period.

2. The activity amount calculation device according to claim 1 , further comprising an alert unit configured to issue an alert when a difference between the total activity amount calculated by the summation unit and an average value of a predetermined number of total activity amounts calculated by the summation unit in and before the last calculation exceeds a preset threshold.

3. The activity amount calculation device according to claim 1 , further comprising an alert unit configured to issue an alert when the total activity amount calculated by the summation unit exceeds a preset upper limit.

4. The activity amount calculation device according to claim 1 , further comprising an alert unit configured to issue an alert when the total activity amount calculated by the summation unit falls below a preset lower limit.

5. The activity amount calculation device according to claim 1 , wherein each activity amount is expressed as a distance.

6. An activity amount calculation method of calculating activity amounts of a resident of a dwelling equipped with a plurality of rooms using an activity amount calculation device, the activity amount calculation method performed by a computer and comprising:

(a) a step of calculating activity amounts of the resident based on detection signals output from a plurality of detection devices that detect the resident when the resident passes through doorways of the plurality of rooms; and

(b) a step of repeatedly calculating a total activity amount of the resident in a predetermined period by summing the activity amounts calculated in step (a), wherein

in step (a), upon detection of the resident by different detection devices included among the plurality of detection devices, an activity amount of the resident is calculated based on a preset relationship between the different detection devices and a reference activity amount, wherein

the calculation unit uses the reference activity amount as the activity amount of the resident when an elapsed period between detection by one of the different detection devices that has detected first and detection by another of the different detection devices that has detected second is longer than or equal to a preset reference period, and

the calculation unit uses a product of the reference activity amount and a coefficient larger than one as the activity amount of the resident when the elapsed period is shorter than the reference period.

7. The activity amount calculation method according to claim 6 , further comprising:

(c) a step of issuing an alert when a difference between the total activity amount calculated in step (b) and an average value of a predetermined number of total activity amounts calculated in and before the last calculation exceeds a preset threshold.

8. The activity amount calculation method according to claim 6 , further comprising:

(d) a step of issuing an alert when the total activity amount calculated in step (b) exceeds a preset upper limit.

9. The activity amount calculation method according to claim 6 , further comprising:

(e) a step of issuing an alert when the total activity amount calculated in step (b) falls below a preset lower limit.

10. The activity amount calculation method according to claim 6 , wherein each activity amount is expressed as a distance.

11. A non-transitory computer-readable recording medium having recorded therein a program for calculating activity amounts of a resident of a dwelling equipped with a plurality of rooms using a computer, the program including an instruction for causing a processor of the computer to execute:

(a) a step of calculating activity amounts of the resident based on detection signals output from a plurality of detection devices that detect the resident when the resident passes through doorways of the plurality of rooms; and

(b) a step of repeatedly calculating a total activity amount of the resident in a predetermined period by summing the activity amounts calculated in step (a), wherein

in step (a), upon detection of the resident by different detection devices included among the plurality of detection devices, an activity amount of the resident is calculated based on a preset relationship between the different detection devices and a reference activity amount, wherein

the calculation unit uses the reference activity amount as the activity amount of the resident when an elapsed period between detection by one of the different detection devices that has detected first and detection by another of the different detection devices that has detected second is longer than or equal to a preset reference period, and

the calculation unit uses a product of the reference activity amount and a coefficient larger than one as the activity amount of the resident when the elapsed period is shorter than the reference period.

12. The non-transitory computer-readable recording medium according to claim 11 , wherein the program further includes an instruction for causing the computer to execute:

(c) a step of issuing an alert when a difference between the total activity amount calculated in step (b) and an average value of a predetermined number of total activity amounts calculated in and before the last calculation exceeds a preset threshold.

13. The non-transitory computer-readable recording medium according to claim 11 , wherein the program further includes an instruction for causing the computer to execute:

(d) a step of issuing an alert when the total activity amount calculated in step (b) exceeds a preset upper limit.

14. The non-transitory computer-readable recording medium according to claim 11 , wherein the program further includes an instruction for causing the computer to execute:

(e) a step of issuing an alert when the total activity amount calculated in step (b) falls below a preset lower limit.

15. The non-transitory computer-readable recording medium according to claim 11 , wherein each activity amount is expressed by a distance.