A vehicle navigation apparatus wherein a detection unit comprising a gyro sensor operates by receiving a power supply from an onboard device. The onboard device comprises: a first control circuit which functions as a navigation apparatus; and a second control circuit which activates in a shorter time period (ΔT3) than the first control circuit, and starts the power supply to the detection unit, and collection of vehicle information. The detection unit comprises a zero point correction unit which samples the gyro voltage for a prescribed interval (ΔT0) after the power supply is started by the second control circuit. On the basis of the vehicle information which is transmitted after the activation of the first control circuit, the zero point correction unit determines whether the vehicle was stopped during the sampling interval, and sets a zero point for the gyro sensor on the basis of the gyro voltage sampling result
Vehicle navigation apparatus
2016-10-18
Patent
Electronic Resource
English