RU2013104546A - METHOD FOR DETECTING OPTICAL AND OPTICAL-ELECTRONIC MEANS OF MONITORING AND DEVICE FOR ITS IMPLEMENTATION - Google Patents

Abstract

1. A method for detecting optical and optoelectronic observational means (OESN), including sensing the controlled space volume (OPC) with scanned pulsed laser radiation (LI) at a wavelength λ, receiving reflected LI signals and signals of natural background radiation from the COS, converting the received LI into an electrical signal, its threshold processing, detection of OESN and range determination, characterized in that the reception of signals of natural background radiation from the CPC is carried out before sensing the CPC, in the adopted EU The natural background radiation from the CPC measures the spectral distribution of radiation, in the measured spectral distribution determines the relationship between the intensities W, W, W of the spectral components, at a wavelength λ and at two additional wavelengths λ, λ corresponding to the intensities W, W, W, pulsed pulsed radiation beams are generated at wavelengths λ, λ, λ with the ratio of the intensities of the beams P, P, P corresponding to the ratio between the intensities W, W, W of the spectral components in the spectral distribution of the background radiation from the CPC, the sum The LI beam through optical summation of the beams at wavelengths λ, λ, λ, then the probes are probed by the generated LI beam and the laser radiation reflected from the CPC is received at wavelengths λ, λ, λ and in a wide spectral band Δλ = λ ÷ λ, after transform the received LI into electric signals and their threshold processing, measure the levels of received optical LI signals, determine the values of retroreflectivity (PSV) at wavelengths λ, λ, λ and for the ∆λ band, form a spectral portrait of PSV on them, according to which

Claims (6)

1. A method for detecting optical and optoelectronic observational means (OESN), including sensing a controlled space volume (OPC) with scanned pulsed laser radiation (LI) at a wavelength of λ ₁ , receiving reflected LI signals and signals of natural background radiation from the CPC, converting the received LI into an electrical signal, its threshold processing, detection of AES and range determination, characterized in that the reception of signals of natural background radiation from the CPC is carried out before sensing the CPC, in the received natural background radiation from the CPC, the spectral distribution of radiation is measured, in the measured spectral distribution, the ratio between the intensities W ₁ , W ₂ , W _{3 of the} spectral components at the wavelength is determined λ ₁ and at two additional wavelengths λ ₂ , λ ₃ corresponding to intensities W ₁ , W ₂ , W ₃ , pulsed pulsed radiation beams are generated at wavelengths λ ₁ , λ ₂ , λ ₃ with a ratio of beam intensities P ₁ , P ₂ , P ₃ corresponding to the ratio between the intensities W ₁ , W ₂ , W _{3 of the} spectral components in the spectral distribution of the background radiation from the CPC, the total LI beam is formed by optical summation of the beams at the wavelengths λ ₁ , λ ₂ , λ ₃ , then the CPC is probed with the generated LI beam and receiving laser radiation reflected from the CPC at wavelengths λ ₁ , λ ₂ , λ ₃ and in a wide spectral band Δλ = λ ₃ ÷ λ ₁ , after converting the received LI into electrical signals and their threshold processing, measure the levels of received optical LI signals, determine the values of retroreflectivity indicators (PSV) at wavelengths λ ₁ , λ ₂ , λ ₃ and for the band ∆λ, from them form a spectral portrait of PSV, by which OESN is detected and recognized. 2. The method according to claim 1, characterized in that the determination of retroreflectivity indicators (PSV) P _i for each of the laser radiation wavelengths λ _i (i = 1, 2, 3) used to illuminate the controlled space (COP) is carried out in accordance with the following formula: $$P_i=\frac{E_i}{P_{n_i}}{\theta }_{ni}^2{L}^{\mathrm{four}}\frac{\mathrm{one}}{D_{PR}^2{\tau }_{\mathrm{ABOUT}MT}{\tau }_{\mathrm{but}tm}}$$

, where E _i is the value of the level of the received optical signal reflected from the CPC at a wavelength λ _i (i = 1, 2, 3) of the probing CPC LI; $$P_{n_i}$$

- the magnitude of the energy (power) of the probing COD LI at a wavelength of λ _i ; θ _ni is the divergence of the LI beam at the wavelength λ _i ; L is the measured distance to the detected object; D _CR - diameter (current) of the receiving lens of the implementing device; τ _OMT is the transmittance of the optical-mechanical path of the implementing device; τ _atm - the transmission of the atmospheric tract at the corresponding wavelength λ _i . 3. The method according to claim 1, characterized in that the determination of the retroreflectivity index (PSV) P _Δ for a wide band of wavelengths Δλ = λ ₃ -λ _{1 of the} probe LI is carried out in accordance with the following formula: $$P_{\Delta }=\frac{E_{\Delta }}{P_{\Delta }}\cdot {\theta }_{\mathrm{from}R}^2{L}^{\mathrm{four}}\cdot \frac{\mathrm{one}}{D_{PR}^2{\tau }_{\mathrm{about}mt}^{\mathrm{from}R}{\tau }_{\mathrm{but}tm\mathrm{from}R}}$$

, where E _Δ is the value of the level of the received optical signal reflected from the CPC in a wide band of wavelengths Δλ = λ ₃ -λ ₁ registered by the broadband photodetector of the device that implements the method; P _∆ - the total value of the energy (power) LI probing the CPC $$P_{\Delta }={\displaystyle \sum _{i=\mathrm{one}}^3{P}_{ni}}$$

; θ _cf $${\tau }_{\mathrm{about}mt}^{\mathrm{from}R}$$

, _{atm. cf} are the divergences of the LI, transmission of the optical-mechanical path, and transmission of the atmosphere, averaged over wavelengths λ ₁ , λ ₂ , λ ₃ . 4. A device for detecting optical and optoelectronic surveillance devices, comprising a scanning unit sequentially arranged on the optical axis, a first laser generator operating at a first wavelength λ ₁ , a first lens, the optical input of which is connected via an optical mirror to the optical input of the scanning unit, first a photodetector, the optical input of which is connected via the first optical filter, the first lens and the second optical mirror to the optical output of the first lens, the first processing unit information, the input of which is connected to the output of the first photodetector, the second lens, the optical axis of which is parallel to the optical axis of the scanning unit, the electrical input of which is connected to the first information processing unit, characterized in that the second and third laser generators, three controlled optical filters, an optical adder are introduced , an optical spectrum analyzer, four photodetector units, a second information processing unit, a recognition unit, first and second hinged mirrors, three photodetectors, three optical fi three, four translucent mirrors and four optical mirrors, as well as four fiber-optic optical fibers, the optical input of the optical spectrum analyzer connected to the optical output of the second lens, the optical output of the optical spectrum analyzer through optical fiber optical fibers connected to the inputs of four photodetector units, the outputs of which are connected to the second information processing unit, the optical input of the optical adder through three controlled optical filters, a translucent and optical mirror Alas are connected with the corresponding optical outputs of the first, second and third laser generators, the optical output of the optical adder is connected to the optical input of the scanning unit, and through the first folding mirror, two optical mirrors and the second folding mirror is optically connected to the optical input of the optical spectrum analyzer, the optical output of the first lens optically connected to the newly introduced second, third and fourth photodetectors through three translucent mirrors, three lenses and three optical filaments trov, the outputs of the second, third and fourth photodetectors are connected to the inputs of the first information processing unit, the outputs of which are connected to the recognition unit and the second information processing unit, the outputs of which are connected to the control inputs of the first, second and third laser generators, the first, second and third controlled filters and the first and second folding mirrors. 5. The device according to claim 4, characterized in that it has an optical spectrum analyzer based on an optical diffraction grating. 6. The device according to claim 4, characterized in that the recognition unit in it is made on the basis of a digital electronic computer containing a data unit of the values of the reference portraits of the spectral indicators of retroreflection (PSV).