Sensor system
First Claim
1. A sensor system comprising:
- a vibration-type angular-speed sensor unit including;
a pair of vibrators vibrating in a reference direction determined in advance at phases opposite to each other, wherein the pair of vibrators output opposite-phase waveform components to vibrate in an angular-speed detection direction at phases opposite to each other and same-phase waveform components to vibrate in the angular-speed detection direction at a same phase, wherein the angular-speed detection direction is perpendicular to the reference direction; and
a detection waveform generation unit for detecting a detection-object vibration component resulting from application of an angular speed to the vibrator as a component in the angular-speed detection direction and for generating an angular-speed detection waveform based on the detection-object vibration component;
an acceleration sensor unit for outputting a first-type acceleration signal, wherein the first acceleration sensor unit is provided separately from the vibration-type angular-speed sensor unit;
a second-type acceleration-signal generation unit for extracting an acceleration signal component from the same-phase waveform components generated by the vibration-type angular-speed sensor unit and outputting the extracted acceleration signal component as a second-type acceleration signal; and
an abnormality detection unit for detecting an abnormality of at least the vibration-type angular-speed sensor unit or the acceleration sensor unit based on the second-type acceleration signal and the first-type acceleration signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An inertia sensor system incorporates a vibration-type angular-speed sensor unit and an acceleration sensor unit provided separately. The inertia sensor system also includes a second-type acceleration signal generation unit to extract an acceleration signal component from a detection-object vibration component generated by the vibration-type angular-speed sensor unit and outputs the extracted acceleration signal component as a second-type acceleration signal. An abnormality detection unit detects an abnormality of at least the vibration-type angular-speed sensor unit or the acceleration sensor unit based on the second-type acceleration signal and a first-type acceleration signal detected and output by the acceleration sensor unit.
18 Citations
9 Claims
-
1. A sensor system comprising:
-
a vibration-type angular-speed sensor unit including; a pair of vibrators vibrating in a reference direction determined in advance at phases opposite to each other, wherein the pair of vibrators output opposite-phase waveform components to vibrate in an angular-speed detection direction at phases opposite to each other and same-phase waveform components to vibrate in the angular-speed detection direction at a same phase, wherein the angular-speed detection direction is perpendicular to the reference direction; and a detection waveform generation unit for detecting a detection-object vibration component resulting from application of an angular speed to the vibrator as a component in the angular-speed detection direction and for generating an angular-speed detection waveform based on the detection-object vibration component; an acceleration sensor unit for outputting a first-type acceleration signal, wherein the first acceleration sensor unit is provided separately from the vibration-type angular-speed sensor unit; a second-type acceleration-signal generation unit for extracting an acceleration signal component from the same-phase waveform components generated by the vibration-type angular-speed sensor unit and outputting the extracted acceleration signal component as a second-type acceleration signal; and an abnormality detection unit for detecting an abnormality of at least the vibration-type angular-speed sensor unit or the acceleration sensor unit based on the second-type acceleration signal and the first-type acceleration signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A sensor system comprising:
-
a vibration-type angular-speed sensor unit including; a pair of the vibrators vibrating in a reference direction determined in advance at phases opposite to each other; and a detection waveform generation unit for detecting a detection-object vibration component resulting from application of an angular speed to the vibrator as a component in an angular-speed detection direction set to cross the reference direction and for generating an angular-speed detection waveform based on the detection-object vibration component; an acceleration sensor unit for outputting a first-type acceleration signal, wherein the first acceleration sensor unit is provided separately from the vibration-type angular-speed sensor unit; a second-type acceleration-signal generation unit for extracting an acceleration signal component from a detection-object vibration component generated by the vibration-type angular-speed sensor unit and outputting the extracted acceleration signal component as a second-type acceleration signal; an abnormality detection unit for detecting an abnormality of at least the vibration-type angular-speed sensor unit or the acceleration sensor unit based on the second-type acceleration signal and the first-type acceleration signal, an angular-speed computation means for computing an angular speed based on opposite-phase waveform components output by the vibrators to vibrate in the angular-speed detection direction at phases opposite to each other and outputting an angular-speed detection signal as the computed angular speed; and an acceleration detection means for computing an acceleration based on same-phase waveform components output by the vibrators to vibrate in the angular-speed detection direction at the same phase and outputting the second-type acceleration signal as the computed acceleration. - View Dependent Claims (9)
-
Specification