TRASDUTTORE DI ACCELERAZIONE AD EFFETTO CAPACITIVO

The transducer includes a support plate 2 and a support 4 to which is cantilevered a flexible metal blade 6 which faces and is spaced from a fixed metal plate member 3 so as to constitute a capacitor whose capacitance is variable in dependence on the acceleration to which it is subjected. The support plate 2 is of insulating material and plate 3 may be a deposited thin metal layer, or may comprise a second metal blade also cantilevered from support 4. Detector means are provided for producing an electrical signal indicative of the capacitance of the capacitor and hence of the acceleration. The capacitor may either affect the frequency of an oscillator with subsequent voltage to frequency conversion or a fixed oscillator may be connected to a monostable with pulse duration controlled by the capacitor.