Patent ID: 8493082

Claim:
A seating sensing device comprising: a variable resistance unit configured to generate resistance values corresponding to a length in a seat region of a seat, the variable resistance unit including a plurality of conductive threads installed in the seat, the seat comprising a plurality of seat regions; and a signal analysis unit configured to analyze variable quantities corresponding to the resistance values to acquire activity information indicating one or more of whether a user is seated or not, a seating posture, and a seating posture change, the signal analysis unit comprising a resistance-voltage converter configured to convert the resistance values into corresponding voltage values and an activity information generator configured to analyze a pattern in the voltage values to acquire the activity information, wherein the activity information generator is configured to determine patterns of change in the seat regions in which the voltage values are increased to be greater than before, to confirm whether the seating posture of the user is changed or not, to generate and output the activity information indicating that the seating posture has been changed.