Piezoelectric multi-purpose device for projectiles (u)

Claim 1

An environmental sensing device for use in both spin and nonspin projectile fuzes, comprising: a. a chamber located in the nose section of the fuze body to receive air impinging thereon while said projectile is in flight; b. a piezoelectric crystal affixed to the inner wall of said chamber; c. storage means connected to said crystal to receive a first voltage signal generated in response to the setback forces produced as a result of the launching of the projectile; d. means for receiving a second voltage signal generated by said crystal in response to its vibrations created by the air impinging upon said chamber while said projectile is in flight whereby the amplitude of said second voltage signal iS proportional to the velocity of said projectile; e. comparator circuitry for determining whether said first and second voltage signals fall within certain predefined voltage limits and time intervals established for the particular gun and projectile under consideration; f. logic circuitry for producing an arming signal at a first output only upon the plural receipt of valid first and second voltage signals from said comparator means; g. arming means for receiving said arming signal from said first output to arm said fuze; and h. point detonating means for actuating the fuze detonator comprising receiving means for a third voltage signal generated by said crystal in response to the impact of said fuze with the target area and means within said logic circuitry for producing a detonation signal at a second output in response thereto.