Patent ID: 8997569
Filing Date: 2015-04-07
Classification: G01C,G01P

Abstract:
1. A compound sensor comprising: a first unit including first and second oscillators symmetrically disposed to each other and being able to be displaced in a driving direction and a detecting direction; a second unit including third and fourth oscillators symmetrically disposed to each other and being able to be displaced in the driving direction and the detecting direction; a drive unit configured to drive the first, second, third and fourth oscillators so as to oscillate the first and second oscillators in opposite phase to each other, and the third and fourth oscillators in opposite phase to each other, and so as to oscillate the first unit and the second unit in opposite phase to each other; a detection unit configured to detect displacements of the first, second, third and fourth oscillators in the detecting direction; and a processing unit configured to calculate an acceleration, an angular rate, an angular acceleration and a centrifugal force respectively and independently from the displacements of the first, second, third and fourth oscillators, wherein the first unit and the second unit respectively further include a same number of additional oscillators other than the first, second, third and fourth oscillators, and wherein the drive unit drives the additional oscillators so as to make oscillators in opposite phase a same number if a total number of the oscillators included in the first unit and the second unit is even after the additional oscillators are added, and so as to oscillate the additional oscillators opposite in phase to a nearest disposed oscillator within the first unit and the second unit if the total number of the oscillators included in the first unit and the second unit is odd after the additional oscillators are added.