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Keyobard music instrument for producing tone and hammer sensor for stimulating physical parameter of hammer

A technology of keyboard instruments and sensors, which is applied in the direction of converting sensor output, musical instruments, stringed instruments, etc., and can solve problems such as error components

Inactive Publication Date: 2002-08-21
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Another problem inherent in the second and third hammer transducers is the error component caused by an approximation

Method used

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  • Keyobard music instrument for producing tone and hammer sensor for stimulating physical parameter of hammer
  • Keyobard music instrument for producing tone and hammer sensor for stimulating physical parameter of hammer
  • Keyobard music instrument for producing tone and hammer sensor for stimulating physical parameter of hammer

Examples

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Effect test

no. 2 example

[0117] see Figure 15 , is a practice key embodying the present invention made according to an upright piano. The black / white keys 40 and action mechanism 41 are the same as those of an upright piano, while the hammer assemblies and strings are replaced by dumb hammers 43 and a vibration absorber 44. When a trainee plays a tone on the black / white key 41, the action mechanism 42 is activated. And the mute hammer 43 is driven to rotate. The mute hammer 43 bounces off the shock absorber 44 without producing any tone.

[0118] The keys used for practice also include an electronic tone generation system. The electronic tone generating system includes a bank of hammer transducers 45 , a controller 46 and a sound system 47 . The hammer sensor 45 is the same as the hammer sensor 21, and monitors the dumb hammers 43, respectively. The hammer sensor 45 generates a hammer position signal representing the current position of the mute hammer in the motion track, and sends the hammer s...

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PUM

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Abstract

A hammer sensor includes a photo-filter plate movable together with a hammer assembly and having a base plate fixed to the hammer shank and an arc pattern formed on the base plate and different in transparency from the base plate, a photo radiating element radiating a light beam toward the arc pattern and a photo detecting element disposed on the optical path of the light beam for converting the amount of transmitted light to an electric signal, wherein the photo-filter plate converts the rotational angle of the hammer assembly to the amount of light incident on the photo detecting element, and makes the photo radiating element and the photo detecting element stationary so that a suitable photo-shield case prevents the photo elements from environmental light.

Description

technical field [0001] The present invention relates to a keyboard musical instrument, and more particularly, to a keyboard musical instrument equipped with hammers, for example, an automatic player piano and a silent piano, and a hammer sensor applied thereto. Background technique [0002] The player piano is a synthetic keyboard musical instrument based on an acoustic piano, a row of solenoid-controlled key drivers and a row of key sensors are provided corresponding to the keys, and an electronic control system is linked to the solenoid-controlled Key drive device array and key sensor array, when a player plays a tune on the keys, the black keys and white keys are respectively depressed by the player, and the associated key sensors report the key movement to the electronic control system . The electronic control system determines which black / white key is depressed and which is released, and determines the duration for which the black / white key...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10F1/02G01D5/347G10C3/18G10G3/04G10H1/00G10H1/34
CPCG10F1/02G01D5/34715G01D5/34776G10G3/04G10C3/18
Inventor 村松繁佐佐木力加藤忠晴
Owner YAMAHA CORP
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