DEVELOPMENT OF A NEW ELECTRO-PNEUMATIC TRANSDUCER

Document Type : Original Article

Authors

1 Dr., Professor, Institut de Mechanique des Fluides, ENSEEIHT, Toulouse, France.

2 Dr., Assistant Prof., Dept. of Mech. Power & EFergy, MTC, EGYPT.

Abstract

Reading process is one of the most important problems facing blinds, as they can read only texts printed in BRAIL. That, for sure, shrinks the domains from which they could get information. In the last seven years, a serious study was performed in France aiming particularly for creating a new system consisting mainly of an optical element (camera) which can be passed over the ordinary printed letters to transform each of them into specific electric code. This last one, when gotten as an input to a special transducer, is transformed to give a pressure output acting upon a system of tinny plungers, which give at last tactile signals, readable by blinds. In this way any ordinary printed text can be available to be read if blinds demand for it without asking for help, whenever they want. Hereafter, the main idea of the system is described altogether with the necessary preparatory studies that were important to be carried out before getting deeply into the system details, Being the most important element in the system, the electro pneumatic transducer is also analysed with its measured characteristics and performance parameters.

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