Vibration detection mechanism and vibration sensor unit

Patent metadata

Field	Value
Publication number	US-9958314-B2
Application number	US-201415102339-A
Country	US
Kind code	B2
Filing date	Dec 24, 2014
Priority date	Dec 24, 2013
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A vibration detection mechanism includes: a first sensor section that detects vibration of a vibrating member of a musical instrument in a first direction being a main vibration direction; a second sensor section that detects vibration of the vibrating member in a second direction being approximately perpendicular to the first direction; and a third sensor section that detects vibration of the vibrating member in a third direction being approximately perpendicular to both the first direction and the second direction. Sensitivity of the second sensor section is greater than sensitivity of the first sensor section. Sensitivity of the third sensor section is greater than the sensitivity of the first sensor section.

First claim

The invention claimed is:

1. A vibration detection mechanism comprising:
a first sensor section that detects vibration of a vibrating member of a musical instrument in a first direction being a main vibration direction;
a second sensor section that detects vibration of the vibrating member in a second direction being perpendicular to the first direction; and
a third sensor section that detects vibration of the vibrating member in a third direction being perpendicular to both the first direction and the second direction,
wherein a sensitivity of the second sensor section that detects vibration of the vibrating member in the second direction perpendicular to the first direction is greater than a sensitivity of the first sensor section that detects vibration of the vibrating member in the first direction being the main vibration direction, and a sensitivity of the third sensor section that detects vibration of the vibrating member in the third direction perpendicular to both the first direction and the second direction is greater than the sensitivity of the first sensor section.

2. The vibration detection mechanism according to claim 1 ,
wherein the vibrating member is a soundboard to which a fixed member is fixed, the fixed member having a surface that is perpendicular to the second direction,
the second sensor section is installed on the surface of the fixed member, and
the second direction is parallel to a wood grain direction of the soundboard at an installation position of the fixed member on the soundboard.

3. The vibration detection mechanism according to claim 1 ,
wherein the vibrating member is a soundboard having a first soundboard surface and a second soundboard surface, a bridge being installed on the first soundboard surface, the second soundboard surface being on an opposite side to the first soundboard surface and being perpendicular to the first direction, and
the first sensor section is installed on the second soundboard surface, and the first sensor section overlaps the bridge when viewed from a direction perpendicular to the second soundboard surface.

4. The vibration detection mechanism according to claim 1 ,
wherein the vibrating member is a soundboard having a first soundboard surface and a second soundboard surface, a bridge being installed on the first soundboard surface, the second soundboard surface being on an opposite side to the first soundboard surface, a fixed member being fixed to the second soundboard surface, and the fixed member has a surface perpendicular to the first direction, and
the first sensor section is installed on the surface of the fixed member, and the first sensor section overlaps the bridge when viewed from a direction perpendicular to the second soundboard surface.

5. The vibration detection mechanism according to claim 1 ,
wherein the vibrating member is a soundboard having a first soundboard surface and a second soundboard surface, a bridge being installed on the first soundboard surface, the second soundboard surface being on an opposite side to the first soundboard surface and being perpendicular to the first direction, and
the first sensor section is installed on the second soundboard surface, and the first sensor section overlaps the bridge when viewed from a direction perpendicular to the second soundboard surface.

6. The vibration detection mechanism according to claim 1 ,
wherein the vibrating member is a soundboard having a first soundboard surface and a second soundboard surface, a bridge being installed on the first soundboard surface, the second soundboard surface being on an opposite side to the first soundboard surface, a fixed member being fixed on the second soundboard surface, and the fixed member has a surface perpendicular to the first direction, and
the first sensor section is installed on the surface of the fixed member, and the first sensor section overlaps the bridge when viewed from a direction perpendicular to the second soundboard surface.

7. The vibration detection mechanism according to claim 1 , further comprising:
a base that has a first surface, a second surface, and a third surface that are mutually perpendicular,
wherein the first sensor section is arranged on the first surface, the second sensor section is arranged on the second surface, and the third sensor section is arranged on the third surface, and
the first surface is perpendicular to the first direction, and the base is installed on the vibrating member or on a fixed member fixed to the vibrating member.

8. The vibration detection mechanism according to claim 1 , wherein each of the first, second, and third sensor sections includes: a sensor that detects vibration of the vibrating member; and an amplifier that amplifies the vibration detected by the sensor.

9. A vibration sensor unit comprising:
an installation surface for installation on a surface that is of a vibrating member of a musical instrument or a member fixed to the vibrating member and is perpendicular to a first direction being a main vibration direction;
a first surface that is parallel to the installation surface;
a second surface that is perpendicular to the first surface;
a third surface that is perpendicular to both the first surface and the second surface;
a first sensor section that is installed on the first surface and detects vibration of the vibrating member in the first direction;
a second sensor section that is installed on the second surface and detects vibration of the vibrating member in a second direction being perpendicular to the first direction; and
a third sensor section that is installed on the third surface and detects vibration of the vibrating member in a third direction being perpendicular to both the first direction and the second direction, and
wherein sensitivity of the second sensor section is greater than sensitivity of the first sensor section, and sensitivity of the third sensor section is greater than the sensitivity of the first sensor section.

10. The vibration sensor unit according to claim 9 ,
wherein the first sensor section includes: a first sensor that is installed on the first surface and detects the vibration in the first direction; and a first amplifier that amplifies the vibration detected by the first sensor,
the second sensor section includes: a second sensor that is installed on the second surface and detects the vibration in the second direction; and a second amplifier that amplifies the vibration detected by the second sensor, and
the third sensor section includes: a third sensor that is installed on the third surface and detects the vibration in the third direction; and a third amplifier that amplifies the vibration detected by the third sensor.

Assignees

• Yamaha Corp

Inventors

• Oba Yasuhiko
• Koseki Shinya

Classifications

• G10H3/146

  using a membrane, e.g. a drum; Pick-up means for vibrating surfaces, e.g. housing of an instrument · CPC title

• G01H1/00 Primary

  Measuring {characteristics of} vibrations in solids by using direct conduction to the detector (G01H9/00, G01H11/00 take precedence) · CPC title

• G01H3/00

  Measuring {characteristics of} vibrations by using a detector in a fluid (G01H7/00, G01H9/00, G01H11/00 take precedence) · CPC title

• G10C3/06

  Resonating means, e.g. soundboards or resonant strings; Fastenings thereof · CPC title

• G10G3/04

  using electrical means · CPC title