PROCESS OF MANUFACTURE OF CONTACT TRANSDUCER IN THE FORM OF STRATIFIED FILM Russian patent published in 2001 - IPC

FIELD: technology of manufacture of threshold pressure transducers anchored on surface of measured objects for one-time recording of destruction loads of object. SUBSTANCE: first workpiece of current-conducting element is prepared by joining of solid metal sheet, preferably aluminum, and dielectric material laminated on two sides with second dielectric material. Oligomer of polypyromellitimide is utilized in the capacity of basic dielectric material and polytetrafluoroethylene is used as second dielectric material. Sheets are joined by method of thermal compression welding under pressure of 1.2-1.5 MPa at temperature of 300-400 C. Current-conducting circuit is cut out from prepared workpiece. Then it is connected with dielectric material laminated on two sides from side of open surface. Fragments of transducer prepared in similar way are assembled in package with orientation of open surfaces in opposition to pressure acting on object. On outside package is surrounded with layers of dielectric material laminated with second dielectric material on side of package and then by layers of elastic element for reduction of assembly. Obtained assembly is placed in press and all its elements are connected in process of thermal compression welding under pressure of 1.2-1.5 MPa at temperature of 300-400 C. Later pressure is removed, heating is switched off and assembly is taken out of press. Auxiliary elastic elements are also removed. EFFECT: provision for reliable determination of coordinates and fact of destruction of object, enhanced reliability and simplification of process, possibility of installation of transducer in places difficult of access. 3 cl, 2 dwg, 1 tbl