Pressure sensor

The sensor includes a rigid support and a diaphragm having a peripheral portion fixed by a layer of glue to the support. The central portion of the diaphragm is spaced from the support and, on its surface facing the support, carries at least one thick-film resistor acting as a piezo-resistive transducer. The diaphragm can deform resiliently towards the support when a pressure is exerted on its other surface. The surface of the support which is connected to the diaphragm is flat, and the layer of glue has a calibrated thickness such that the distance between the diaphragm and the surface of the support at rest is substantially equal to the deflection of the diaphragm corresponding to a predetermined maximum pressure measured. SENSOR DE PRESION, QUE COMPRENDE UN SOPORTE RIGIDO (10) Y UN DIAFRAGMA (20) QUE TIENE UNA PORCION PERIFERICA FIJADA POR UNA CAPA DE COLA (30) AL SOPORTE (10) Y UNA PORCION CENTRAL ESPACIADA DEL SOPORTE (10) Y QUE COMPORTA, SOBRE SU SUPERFICIE ENFRENTADA AL SOPORTE (10), POR LO MENOS UN RESISTOR DE PELICULA GRUESA (R) QUE ACTUA COMO UN TRANSDUCTOR PIEZO-RESISTIVO, SIENDO EL DIAFRAGMA (20) APTO PARA DEFORMARSE ELASTICAMENTE HACIA EL SOPORTE (10) CUANDO SE EJERCE UNA PRESION SOBRE SU OTRA SUPERFICIE, CARACTERIZADO PORQUE LA SUPERFICIE (10A) DEL SOPORTE (10) QUE SE CONECTA AL DIAFRAGMA (20) ES PLANA, Y PORQUE LA CAPA DE COLA (30) TIENE UN ESPESOR CALIBRADO DE MODO QUE LA DISTANCIA (D) ENTRE EL DIAFRAGMA (20) Y LA SUPERFICIE (10A) DEL SOPORTE (10) EN REPOSO SEA SUSTANCIALMENTE IGUAL A LA DEFLEXION DEL DIAFRAGMA (20) CORRESPONDIENTE A LA PRESION MAXIMA PREDETERMINADA MEDIDA.