Patent ID: 9237863
Filing Date: 2016-01-19
CPC Classification: A61B,G01G

Claim Text:
1. A personal authentication apparatus comprising: first one or more electrodes configured to apply a current to a body; second one or more electrodes configured to measure a voltage derived from the body at a time of applying the current; a memory; and a processor configured to: acquire, from the second one or more electrodes, body weight and body impedance of a measurement subject; perform an operation of inputting personal information that includes at least one of age, height, and sex that are specific to the measurement subject; based on measurement results including the acquired body weight and the acquired body impedance, and the input personal information, calculate a calculation value relating to body composition that is less susceptible to temporal variation than body water amount; store, in the memory, at least the acquired body weight, the input personal information, and the calculation value in association with measurement subject specification information that specifies the measurement subject; compare a calculation value that was most recently stored in the memory and a new calculation value that is newly calculated; and based on a difference between calculation values obtained by comparing the most recently stored calculation value and the new calculation value, specify which of the pieces of measurement subject specification information stored in the memory corresponds to the acquired measurement result.