| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication-terminal position-determination device capable of detecting the position of a communication terminal more accurately. <P>SOLUTION: A magnetic-field-intensity calculation part 20 calculates the magnetic field intensity on a driver side when an electronic key 2 receives a radio wave from a driver-side antenna 11 and the magnetic field intensity on a front-seat-passenger-side when the electronic key 2 receives a radio wave from a front-seat-passenger-side antenna 13, and notifies a vehicle 1 of these calculated values of the magnetic field intensity. A coefficient multiplication part 23 multiplies the magnetic field intensity on the driver side by a coefficient, and also multiplies the magnetic field intensity on the front-seat-passenger-side by the coefficient. A position-determination part 24 calculates a difference in the magnetic field intensities multiplied by the coefficients, so as to determine the position of the electronic key 2 according to the difference in the magnetic field intensities. <P>COPYRIGHT: (C)2011,JPO&INPIT |
