Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1992-07-06
1994-01-11
Lobo, Ian J.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
F42C 1302
Patent
active
052771148
ABSTRACT:
An active optical proximity fuse comprises a transmitter for transmitting a radiation lobe by means of which a target can be illuminated. A receiver receives radiation reflected from the target and images the target or an area of the latter as a spot on a surf ace belonging to a detector which emits at its outputs electrical signals which mutually vary depending on the position of the spot on the detector surface. The detector outputs are connected to first elements which emit a first signal depending on the position of the spot on the surface, the absolute value of which signal is greater with the position of the spot on first parts, preferably outer parts, of the surface than with the position of the spot on another part, preferably the center part, of the surface. Second elements (13) acting as arming elements compare the first signal with a predetermined reference and emit an arming signal (i.sub.A) when two or more first signals, for example in the form of pulses, occur which exceed the reference. A third element forms a first reference signal (V.sub.reft) which constitutes a part (fraction) of the first signal. A fourth element (14) acting as triggering circuit initiates a triggering signal when the arming signal (i.sub.A) is present and when the said first element, after initiation of the arming signal, emits a first signal which drops below the said first reference signal (V.sub.reft) and exceeds a second reference signal determined by the signal noise.
REFERENCES:
patent: 3786757 (1974-01-01), Goldstein et al.
patent: 4232609 (1980-11-01), Held
patent: 4269121 (1981-05-01), Sochard
patent: 4309946 (1982-01-01), Block
patent: 4532867 (1985-08-01), Mitchell
patent: 4936216 (1990-06-01), Skagerlund
patent: 5142985 (1992-09-01), Stearne et al.
Bofors AB
Lobo Ian J.
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