Optical fibre sensor installed easily and music instrument using it

A technology of optical sensor and sensor head, applied in the field of optical sensor, can solve the problems of consuming time and manpower, increasing production cost, etc.

Inactive Publication Date: 2002-07-03
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Consumes a lot of time and manpo

Method used

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  • Optical fibre sensor installed easily and music instrument using it
  • Optical fibre sensor installed easily and music instrument using it
  • Optical fibre sensor installed easily and music instrument using it

Examples

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Example

[0060] It should be understood that the hammer 4 requires only one combined optical element. Therefore, the combined optical element 3c is reduced to half of the combined optical element in the prior art optical fiber sensor array. Second embodiment

[0061] See attached Figure 8 with 9 , The other sensor head 20 forms a part of the optical fiber sensor, and the optical fiber sensor is used in another automatic performance piano according to the embodiment of the present invention. The sensor head 20 is a monolithic integrated circuit main body, and is not divided into a plurality of parts, such as the head main body 10 and the jig 11 and so on. Except for the optical fiber sensor, the automatic performance piano implemented in the second embodiment is similar to the first embodiment. In order to avoid undesired repetition, the description is mainly focused on the optical fiber sensor.

[0062] The optical fiber sensor array also includes a sensor head 20, an optical fiber bundle...

Example

[0070] It should be understood that the wings 21a / 21b elastically press the optical fiber 9 toward the head body portion 20a, and the installation between the sensor head 20 and the optical fiber 9 does not require any adhesive. The installation work will not consume a long time, which reduces the production cost. The third embodiment

[0071] Picture 10 It shows a sensor head 30 used in an automatic performance piano according to another embodiment of the present invention. The automatic performance piano implemented in the third embodiment is similar to the first embodiment except for the optical fiber sensor. In order to avoid undesired repetition, the description is mainly focused on the optical fiber sensor.

[0072] The optical fiber sensor array also includes a sensor head array 30, an optical fiber bundle 3b, a combined optical element 3c, a filter plate 5, and a clamper 31. The combined optical element 3c and the optical fiber bundle 3b are similar to that of the optica...

Example

[0079] It should be understood that the optical fiber 9 is sandwiched between the sensor head 30 and the tongue 32, and no adhesive is required during installation. Workers can complete the installation work without a long time, reducing production costs. Fourth embodiment

[0080] See attached Picture 12 The silent piano of the embodiment of the present invention mainly includes an acoustic piano 81, a hammer stopper 82, and an electronic tone generation system 83. The acoustic piano is similar to the acoustic piano 70, and the hammer stopper 82 can be changed between a free position and a blocking position. The hammer stopper 82 at the free position exceeds the trajectory of the hammer rod 4a, and the hammer device 4 strikes the relevant string 71d without any interference with the hammer stopper 82. On the other hand, when the hammer stopper 82 rotates 90 degrees clockwise, the hammer stopper 82 enters the trajectory of the hammer lever 4a and changes to the blocking position....

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Abstract

An array of optical fiber sensors is installed in an automatic player piano for monitoring the hammers, and a data processing system produces music data codes through the analysis on the current hammer positions reported by the optical fiber sensors, wherein each optical fiber sensor has a sensor head separable into a head body and a holder so that an assembling worker fixes the optical fiber to the sensor head by pressing the optical fiber to the head body with the holder.

Description

technical field [0001] The present invention relates to an optical sensor suitable for a musical instrument, in particular to an optical sensor generating an electrical signal representing the current position of a moving object and a musical instrument equipped with the optical fiber sensor array. Background technique [0002] There are many kinds of composite keyboard instruments. One known compound keyboard instrument is the player piano, and another compound keyboard instrument is known as a "silent piano". In the following description, the term "lateral direction" means a direction in which black keys and white keys are arranged on a well-known pattern employed in a standard acoustic piano. The term "longitudinal" means a direction at 90 degrees to the transverse direction. [0003] A player piano is a combination of an acoustic piano and an electronic system for automatic playing and recording. The electronic system includes a solenoid-operate...

Claims

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Application Information

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IPC IPC(8): G02B6/00G10G3/04G10H1/34G10H7/00H01L31/12
CPCG10G3/04G10H1/346G10H2220/305G10H7/00
Inventor 村松繁佐佐木力
Owner YAMAHA CORP
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