Patent ID: 7317320

Claim:
A method of measuring body fat by using current electrodes for applying a constant current in a human body and voltage electrodes for detecting a voltage drop caused by bioelectrical impedance of the human body, the method comprising: detecting a voltage across the voltage electrodes under a first conditional pressure and a second conditional pressure to obtain a first conditional voltage and a second conditional voltage; determining the conditional pressures, a difference between the conditional pressures, the conditional voltages, a difference between the conditional voltages, and storing the conditional pressures, the difference between the conditional pressures, the conditional voltages, and the difference between the conditional voltages in a memory; detecting a measurement voltage under an arbitrary pressure; performing interpolation by using the conditional pressures, the difference between the conditional pressures, the conditional voltages, the difference between the conditional voltages, and the arbitrary pressure to obtain a contact voltage; and compensating the measurement voltage for the contact voltage to calculate a body fat value corresponding to the compensated measurement voltage.