Title: Piano keyboard acting photoelectronic digital detector
Application Number: 03131512 Application Date: 2003.05.21
Publication Number: 1457036 Publication Date: 2003.11.19
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10C3/00
Applicant(s) Name: Sun Wei Address: 210001
Inventor(s) Name:
Attorney & Agent: he chaoxu
Abstract:
     The device consists of signal collecting component connecting with piano frame and fingerboard separately. The component comprises components of light-emitting and light-receiving as well as grating which is set in between the two components and can be moved relatively with them. The two components and the grating are moved relatively following the movement of fingerboard moving relatively to the piano frame so the light signal from light-emitting component can be received by light-receiving component through grating which is moved relatively to convert operation parameter to be relevant pulse digital signals of playing strength, up and down direction, state and key playing speed for post processing by computer and circuit in order to output detection result accurately.
Time: 5
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