RU2009145788A - METHOD FOR DETECTING OBJECT TRAJECTORY - Google Patents

Abstract

 1. A method for detecting an object’s trajectory, including emitting a probing signal, receiving a reflected signal, detecting a reflected signal and determining its coordinates during regular inspection of a viewing area of a pulse-Doppler radar station (radar) with a phased array (PAR), calculating the boundaries of the detection confirmation strobe object, inspection strobe confirmation of the detection of the object after an interval of time access to the object TPO; detecting a reflected signal in it, determining its coordinates and assessing their changes, estimating the ground speed and direction of movement of the object, if the coordinates of the object corresponding to the detected signal have changed, or calculating the boundaries of the strobe to capture the path, if the coordinates of the object corresponding to the detected signal have not changed, inspection of the trajectory capture gate through the time interval of access to the TK object, detection of the reflected signal in it and determination of its coordinates, estimation of ground speed and direction of movement object, calculating, based on the estimates of the strobe boundaries, and examining, after a time interval, the TPZ object calls the successive first, second, ..., nth gates of trajectory capture confirmation, deciding whether to detect the trajectory of the object or to stop its detection, characterized in that additionally, simultaneously with the measurement of the coordinates of the reflected signal, the absolute value and direction of the radial velocity of the object are measured and the positions of the centers and the sizes of the gates of confirmation of detection of the object are calculated and capture trajectory in range and angular coordinates taking into account the measured

Claims (3)

1. A method for detecting an object’s trajectory, including emitting a probing signal, receiving a reflected signal, detecting a reflected signal and determining its coordinates during regular inspection of a viewing area of a pulse-Doppler radar station (radar) with a phased array (PAR), calculating the boundaries of the detection confirmation strobe object, inspection strobe confirmation of the detection of the object after an interval of time access to the object T _software ; detecting a reflected signal in it, determining its coordinates and assessing their changes, estimating the ground speed and direction of movement of the object, if the coordinates of the object corresponding to the detected signal have changed, or calculating the boundaries of the strobe to capture the path, if the coordinates of the object corresponding to the detected signal have not changed, check strobe capture trajectory after a time interval T refer to the object _W, detection of a reflected signal and the determination of its coordinates, evaluation of ground speed and direction of motion Nia object, the calculation on the basis of conducted gate boundaries assessments and examination after a time interval refer to the object T _PZ series of first, second, ..., n-th Gates confirmed the capture path, a decision about the discovery of the trajectory of the object or the termination of its detection, wherein, that, in addition to simultaneously measuring the coordinates of the reflected signal, the absolute value and direction of the radial velocity of the object are measured and the positions of the centers and the size of the strobe confirm the detection of the object are calculated and capturing the trajectory in range and angular coordinates, taking into account the measured radial velocity of the object, the errors of its measurement and the criterion for tying the trajectory 2 / m (m≥2); assessment of the measured coordinates of the object detected in the first strobe of confirmation of the detection of the object is made taking into account the standard deviations of the measured coordinates; decide on the detection of the object’s path if the reflected signal detected during the regular inspection of the radar field of view is also detected in one of the m-1 gates for confirming the detection of the object or in one of the m-1 gates for capturing the path and in one of the n gates for confirming the capture trajectories in accordance with the confirmation criterion 1 / n; stop detection of the path if the reflected signal is not detected in any of the m-1 gates of confirmation of detection of the object or in any of the m-1 gates of capture of the path in accordance with the 2 / m tie-in criterion, or is not detected in any of the n confirmation gates trajectory capture in accordance with the confirmation criterion 1 / n; 2. The method according to claim 1, characterized in that the coordinates of the centers of the gates of the confirmation of detection of the object in range and the boundaries of these gates are calculated from the relations: the coordinates of the i-th gate in range: R _O +2 ^i-1 V _r · T _software , where: R _O is the measured range to the detected reflected signal during the regular inspection of the viewing area; V _r is the measured radial velocity of the object; boundaries of the i-th strobe of confirmation of object detection - in angular coordinates:

where: V _αmax - the maximum possible speed of the object in angular coordinates; σ _α is the standard deviation of the measurement of the angular coordinates of the object; range: ΔR _i = ± 2 ^i-1 · max (3σ _R , 3σ _Vr · T _ON ), where: σ _R is the standard deviation of the measurement of the distance R to the object; σ _Vr is the standard deviation of the measurement of the radial velocity V _{r of the} object; max (3σ _R , 3σ _Vr · T _PO ) - for calculations, the maximum value of 3σ _R , 3σ _Vr · T _PO is selected. 3. The method according to claim 1, characterized in that the coordinates of the centers of the gates of capture of the trajectory of the object in range and the boundaries of these gates are calculated from the relations: the coordinates of the j-th gate in range: R _O +2 ^j-1 · V _r · T _3, wherein: _W T is calculated by the formula _W T = σ _R / V _k, V _to - the speed of the ship - carrier radar, boundaries of the i-th strobe of confirmation of object detection - in angular coordinates:

- range: ΔR _j = ± 2 ^j-1 _{· max (3σ R, 3σ Vr} · T _W).