NON-CONTACT OPTICAL FUSE MINES Russian patent published in 2023 - IPC F42C13/02 G01S17/06 

FIELD: non-contact optical fuse mines.

SUBSTANCE: non-contact optical fuse of a mine contains N receiving channels with fields of view, the optical axes of which form acute angles with a plane perpendicular to the longitudinal axis of the mine. It also contains a decision circuit, the output of which is connected to the actuator. N light sources are additionally introduced into the optical fuse, each of which is connected to the output of the corresponding receiving channel, made in form of a photodetector. A light filter is also included, made in form of a plate of two halves with different transmission coefficients of the light sources, placed between the light sources and photodetectors in a plane perpendicular to the longitudinal axis of the mine. A sensitive element of the magnetic compass in form of a magnetic needle with a lock for turning the light filter is also included. Output of the nth light source, where n=1…N, N is the number of receiving channels, is optically connected through a light filter to the input of the nth photodetector, and the output of the nth photodetector is connected to the corresponding input of the decision circuit, made in form of N amplitude selectors, according to the number of its receiving channels, each of which consists of a threshold element and a key. It also consists of two N-input adders, an N-input match circuit, an electronic key, three standby multivibrators, and two three-input match circuits. The outputs of the photodetectors are connected to the corresponding inputs of the amplitude selectors and the N-input matching circuit, the first outputs of the amplitude selectors are connected to the corresponding inputs of the first N-input adder, and the second outputs of the amplitude selectors are connected to the corresponding inputs of the second N-input adder, the output of which is connected to the second input electronic key, to the output of which the first waiting multivibrator and the third input of the second three-input matching circuit are connected. The output of the first N-input adder is connected to the first input of the first three-input matching circuit, the output of the N-input matching circuit is connected to the second input of the first three-input matching circuit and the first input of the electronic key, the output of the first waiting multivibrator is connected to the third input of the first three-input matching circuit, the output of which is connected to the inputs of the second and third waiting multivibrators. The outputs of the latter are connected to the first and second inputs, respectively, of the second three-input matching circuit connected to the input of the fuse actuator.

EFFECT: increase of the probability of recognition of low-flying high-speed objects on the "friend or foe" basis by determining the direction and speed of their flight when objects cross the controlled zone.

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