The invention relates to a
vibrating wire type sensor for weight sensing. The sensor comprises a casing, a sensitive diaphragm is arranged at the bottom of the casing, a connecting base is arranged onthe top of the sensitive diaphragm, a lower connecting rod is connected to the top of the connecting base, a
tungsten filament lower fixing chuck is arranged on the top of the lower connecting rod, an upper connecting rod penetrates through the center of a bearing beam, a trimming nut is arranged on the top of the upper connecting rod, a
tungsten filament upper fixing chuck is arranged on the topof the upper connecting rod, a
tungsten filament is connected between the
tungsten filament upper fixing chuck and the
tungsten filament lower fixing chuck, a
neodymium-iron-
boron magnet is arrangedat the side of the
tungsten filament, a wire is connected to the top of the tungsten filament, the other end of the wire is connected with a front
amplifier and an
information processor, the bottom ofthe tungsten filament is grounded through the sensitive diaphragm, and a cover is arranged on the top of the casing. Accordingly, the tungsten filament serves as a force sensing frequency conversionelement, and the sensor has the advantages of being high in tensile strength and free of
creep deformation and slow sliding at
room temperature so as to achieve the excellent characteristics of
high resolution ratio and no
zero drift.