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Vibrating gyroscope

A vibrating gyroscope and vibration excitation technology, which is applied to gyroscope/steering sensing equipment, instruments, and gyroscopic effect for speed measurement, etc., can solve the problems of unstable measurement sensitivity, difficult adjustment of resonance frequency, and change of measurement sensitivity.

Active Publication Date: 2020-04-24
DENSO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The resonance type has high sensitivity, but on the other hand, it is difficult to adjust the resonance frequency (Non-Patent Document 1)
Even if the resonance frequencies in the two directions deviate slightly, the measurement sensitivity of the rotational speed will change greatly, so the measurement sensitivity is unstable.

Method used

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  • Vibrating gyroscope
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Examples

Experimental program
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Embodiment Construction

[0026] Hereinafter, for convenience of description, the Q value of the vibration in the first direction is referred to as the excitation Q value, and the Q value of the vibration in the second direction is referred to as the detected Q value. The Q value (sharpness) is the dimensionless number obtained by dividing the resonance frequency by the half amplitude value. The half-width value is the frequency (1 / √2) times (0.707 times) when the amplitude becomes resonance when the amplitude is higher than the resonance frequency, and (1 / √2) times (0.707 times) when the amplitude becomes resonance when the amplitude is lower than the resonance frequency. √2) The difference between times the frequency. If the Q value is large, the graph becomes steep near the resonance frequency in the amplitude / frequency characteristic graph, and if the Q value is small, the graph becomes gentle near the resonance frequency.

[0027] To help understanding, the first direction is referred to as the vibr...

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Abstract

A vibrating gyroscope is equipped with: a mass (3) which is supported so as to be capable of displacement in first and second directions which are perpendicular to one another; an exciter (7) for vibrating the mass in the first direction; and a detector (9) for detecting displacement of the mass in the second direction. In addition, the resonant frequency of the mass in the first direction and theresonant frequency thereof in the second direction are identical, and the Q value of the vibrations in the second direction is smaller than the Q value of the vibrations in the first direction.

Description

[0001] Cross-reference of related applications [0002] This application is based on Japanese Patent Application No. 2017-161594 filed on August 24, 2017, and the content of the description is quoted here. Technical field [0003] The invention relates to a vibrating gyroscope. Background technique [0004] The vibrating gyroscope is equipped with: a mass part, which is supported so as to be displaceable in a first direction and a second direction orthogonal to each other, a vibration actuator to vibrate the mass part in the first direction; and detection , The displacement in the second direction of the detection quality part. In the vibrating gyroscope, there are a resonant type in which the resonant frequency in the first direction of the mass portion is the same as the resonant frequency in the second direction, and a non-resonant type in which the resonant frequencies in the two directions are different. The resonance type has high sensitivity, but on the other hand it is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/5762B81B3/00H01L29/84H03H9/24
CPCH03H9/24H01L29/84G01C19/5762B81B3/0062B81B2201/0242B81B2203/0118G01C19/5705G01C19/5719
Inventor 藤吉基弘大村义辉尾崎贵志城森知也后藤胜昭铃木爱美
Owner DENSO CORP
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