US 5,675,083 A · Vibrating gyroscope having divided detection elements

Abstract

A vibrating gyroscope 10 which can suppress a drift signal even if the resonance characteristics of a plurality of detection means of the vibrating body vary includes a vibrator 12. The vibrator 12 comprises a columnar, triangular shaped vibrating body 14 and piezoelectric elements 16, 18, and 20. Divided sections 16a and 16b of the detection piezoelectric element 16 are connected to a first cumulative circuit 32 and a first differential circuit 34. Divided sections 18a and 18b of the detection piezoelectric element 18 are connected to a second cumulative circuit 36 and a second differential circuit 38. Output signals of the first and second cumulative circuits 32 and 36 are input into a third differential circuit 40. Output signals of the first and second differential circuits 34 and 38 are input into a fourth differential circuit 42. Output signals of the third and fourth differential circuits 40 and 42 are input into an arithmetic circuit 44. Alternatively, it may be allowed that the divided sections 16a and 18a, as well as 16b and 18b of the piezoelectric elements 16 and 18 are connected separate differential circuits, and output signals of these differential circuits are input into the arithmetic circuit.

Claims26

Dependent claims

A vibrating gyroscope, comprising:

a vibrating body for vibration;
a plurality of detection means respectively provided at spaced locations of said vibrating body, each of said detection means being divided into several sections;
a first cumulative circuit having input terminals to which two of the divided sections of one of said detection means are respectively connected;
a first differential circuit having input terminals to which said two of the divided sections of said one of said detection means are respectively connected;
a second cumulative circuit having input terminals to which two of the divided sections of another one of said detection means are respectively connected;
a second differential circuit having input terminals to which said two of the divided sections of said another one of said detection means are respectively connected;
a third differential circuit having input terminals to which said first and second cumulative circuits are respectively connected;
a fourth differential circuit having input terminals to which said first and second differential circuits are respectively connected;
and
an arithmetic circuit having input terminals to which said third and fourth differential circuits are respectively connected.

7 more elements

A vibrating gyroscope, comprising:

a vibrating body for vibration;
a plurality of detection means respectively provided at spaced locations of said vibrating body, each of said detection means being divided into several sections with a spacing between the sections of each of said detection means being smaller than a spacing between the sections of one of said detection means and the sections of another of said detection means;
a first differential circuit having first and second input terminals, one of the divided sections of one of said detection means being connected to said first input terminal and one of the divided sections of another of said detection means being connected to said second input terminal;
a second differential circuit having first and second input terminals, another one of the divided sections of said one of said detection means being connected to said first input terminal of said second differential circuit and another one of the divided sections of said another of said detection means being connected to said second input terminal of said second differential circuit;
and
an arithmetic circuit having input terminals to which said first and second differential circuits are respectively connected.

3 more elements

A vibrating gyroscope, comprising:

a vibrating body for vibration;
a plurality of detection elements respectively provided at spaced locations of said vibrating body, each of said detection elements being divided into several sections;
a first cumulative circuit having input terminals to which two of the divided sections of one of said detection elements are respectively connected;
a first differential circuit having input terminals to which said two of the divided sections of said one of said detection elements are respectively connected;
a second cumulative circuit having input terminals to which two of the divided sections of another one of said detection elements are respectively connected;
a second differential circuit having input terminals to which said two of the divided sections of said another one of said detection elements are respectively connected;
a third differential circuit having input terminals to which said first and second cumulative circuits are respectively connected;
a fourth differential circuit having input terminals to which said first and second differential circuits are respectively connected;
and
an arithmetic circuit having input terminals to which said third and fourth differential circuits are respectively connected.

7 more elements

A vibrating gyroscope, comprising:

a vibrating body for vibration;
a plurality of detection elements respectively provided at spaced locations of said vibrating body, each of said detection elements being divided into several sections with a spacing between the sections of each of said detection elements being smaller than a spacing between the sections of one of said detection elements and the sections of another of said detection elements;
a first differential circuit having first and second input terminals, one of the divided sections of one of said detection elements being connected to said first input terminal and one of the divided sections of another of said detection elements being connected to said second input terminal;
a second differential circuit having first and second input terminals, another one of the divided sections of said one of said detection elements being connected to said first input terminal of said second differential circuit and another one of the divided sections of said another of said detection elements being connected to said second input terminal of said second differential circuit;
and
an arithmetic circuit having input terminals to which said first and second differential circuits are respectively connected.

3 more elements

Dependencies are inferred from the claim text.

Vibrating gyroscope having divided detection elements

Life of this patent

Vibrating gyroscope having divided detection elements

Life of this patent

Abstract

Claims26