| 摘要 |
In an external measuring apparatus, a past zero signal value V0 is first read out. A subtracted value obtained by subtracting the zero signal value V0 from a read signal value Vin from an angular velocity detector is compared with a preset first threshold value DELTAV1. If no angular velocity is being applied, then the read signal value Vin is updated and set to the zero signal value V0 in which a drift component is canceled. In addition, the subtracted value obtained by subtracting the zero signal value V0 from the read signal value Vin is further compared with a second threshold value DELTAV2 so as to perform the zero adjustment of the subtracted value. This makes it possible to eliminate the drift component and the random noise component from the detection signal, enabling accurate angular velocity to be obtained.
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