US 2009/0212874 A1 · OSCILLATOR DEVICE

Abstract

An oscillator device having an oscillation system including an oscillator and a resilient supporting member, a driving member configured to supply a driving force to the oscillation system based on a driving signal, a detecting member configured to detect at least an oscillation amplitude of the oscillator, a driving amplitude control unit configured to control at least a driving amplitude of the driving signal, and a driving frequency control unit configured to control a driving frequency of the driving signal to be supplied to the driving member, wherein, in a state in which the driving amplitude control unit controls the driving amplitude of a driving signal so that the oscillation amplitude to be detected becomes equal to a target value, and on the basis of information including driving frequencies in different driving states being driven with driving signals of these driving frequencies as well as the controlled driving amplitude, the driving frequency control unit acquires, as a resonance frequency of the oscillation system, a driving frequency with which the driving amplitude of the driving signal becomes minimal.

Claims16

Dependent claims

An oscillator device, comprising:

an oscillation system including an oscillator and a resilient supporting member;
a driving member configured to supply a driving force to said oscillation system based on a driving signal;
a detecting member configured to detect at least an oscillation amplitude of said oscillator;
a driving amplitude control unit configured to control at least a driving amplitude of the driving signal;
and
a driving frequency control unit configured to control a driving frequency of the driving signal to be supplied to said driving member;
wherein, in a state in which said driving amplitude control unit controls the driving amplitude of a driving signal so that the oscillation amplitude to be detected becomes equal to a target value, and on the basis of information including driving frequencies in different driving states being driven with driving signals of these driving frequencies as well as the controlled driving amplitude, said driving frequency control unit acquires, as a resonance frequency of said oscillation system, a driving frequency with which the driving amplitude of the driving signal becomes minimal.

4 more elements

An oscillator device, comprising:

an oscillation system including an oscillator and a resilient supporting member;
a driving member configured to supply a driving force to said oscillation system based on a driving signal;
a detecting member configured to detect at least an oscillation amplitude of said oscillator;
a driving amplitude control unit configured to control at least a driving amplitude of the driving signal;
and
a driving frequency control unit configured to control a driving frequency of the driving signal to be supplied to said driving member;
wherein, in a state in which said driving amplitude control unit controls and maintains the driving amplitude of the driving signal constant, and on the basis of information including driving frequencies in different driving states being driven with driving signals of these driving frequencies as well as the oscillation amplitude of said oscillator detected by said detecting member, said driving frequency control unit acquires, as the resonance frequency of said oscillation system, a driving frequency of a driving signal with which the oscillation amplitude of said oscillator becomes maximal.

4 more elements

Dependencies are inferred from the claim text.

Oscillator device

Life of this patent

Oscillator device

Life of this patent

Abstract

Claims16