RU2338220C1 - Method of measurement of shell speed - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: shell speed is measured using two velocimeters and associated first and second radio-Dopplers generating Doppler-equal direction in the line of reference trajectory of shell flight. Maxima directivity pattern of specified radio-Dopplers form acute angle with shell flight trajectory. Sequence of shell discrete current speeds are formed in each velocimeter on Doppler frequencies of output signal of first and second radio-Dopplers. Measurement results are compared. If they are established to be equal, then shell is on reference trajectory, disturbance of resulted equality shows that shell is considered to deviate from reference trajectory.

EFFECT: expansion of information value.

1 dwg

Description

The invention relates to measuring systems, namely to means of radar observation of the trajectories of ballistic objects, and can be used to measure the velocity of the shells and determine the location of the projectile on a given trajectory.

A known method of measuring the initial velocity of the projectile, according to which, by implementing the Doppler echo signal of the projectile, a sequence of discrete values of its current velocity is formed and the initial velocity of the projectile is calculated based on the set delay of the start of its observation relative to the moment of departure from the gun’s barrel, for each position in the obtained sequence discrete values of the current velocity of the projectile evaluate the reliability of the data contained in them and, taking into account the results obtained, allocate in this sequence In particular, a plot containing predominantly reliable data by which the initial velocity of the projectile is determined, while when evaluating the reliability of data on the current velocity of the projectile, criteria are used that take into account the specified requirements for the accuracy of measuring the initial velocity of the projectile; when forming a section of the mentioned sequence for calculating the initial velocity of the projectile, the beginning of this section is determined by the presence of at least three consecutive positions with reliable data, and its end by the presence of two or more positions with false data; used to calculate the initial velocity of the projectile, the delay time of the start of the observation is the sum of the set delay and the total duration of the implementation of the Doppler echo signal preceding the first position in the data area formed to calculate the initial velocity of the projectile; if there are single positions with inaccurate data in a selected section of the sequence of discrete values of the current projectile velocity, the data contained in such single positions is replaced by the average value of reliable data from two positions of this section directly adjacent to them, the accuracy of the data on the current velocity of the projectile is checked the signal-to-noise ratio of its value, which is necessary to ensure a given accuracy of determining the initial velocity of the projectile, reliability d data on the current velocity of the projectile is estimated from changes in the values of the current velocity of the projectile presented at adjacent positions in the obtained sequence, while first, by the magnitude of these changes, zones containing inaccurate data are detected, and then by reliable data obtained from positions directly adjacent to these zones , determine for each position in the detected zone the expected speed values and localize each position with inaccurate data, and those positions for which the lysed changes in the values of the current velocity of the projectile do not exceed the value of the specified error in measuring the initial velocity of the projectile. (RF patent for the invention No. 2250476, class G01S 13/58, publ. 04/20/2005 Bull. No. 11).

A device for measuring the initial velocity of a projectile is known, comprising a computer, a Doppler radar connected in series, a Doppler echo signal imaging driver and a discrete current projectile speed discrete generator, as well as a photo start pulse shaper and a timer, the output of which is connected to the second input of the Doppler echo signal imaging driver , the second timer input is connected to the initial delay time sensor, and the third timer input is connected to w each output of the Doppler radar, an implementation counter, a buffer memory, a data reliability analyzer, a data generator for calculating the initial velocity, a meter for the total duration of the initial implementations and an adder, while one output of the discrete value generator of the current projectile speed and the counter output are connected to the buffer data input inputs a storage device, the recording control input of which, together with the counter input of the counter, is connected to the second output of the disformer retentive values of the current velocity of the projectile, and the data output of the buffer storage device is connected to the input of the data reliability analyzer, which is connected to the first input of the computer through the data generator for calculating the initial speed, the second input of which is connected to the adder, the first input of which is connected to the initial delay time sensor, and the second input through the meter of the total duration of the initial implementations is connected to the second output of the data shaper to calculate the initial speed. (RF patent for the invention No. 2250476, class G01S 13/58, publ. 04/20/2005 Bull. No. 11).

The disadvantage of the data of the method and device is low information content, which consists in the lack of the ability to determine the location of the projectile on a given flight path.

An object of the invention is to expand the information content by determining the location of the projectile on a given flight path.

The essence of the invention lies in the fact that in the method of measuring the velocity of the projectile, according to which the Doppler echo signal of the projectile is formed, a sequence of discrete values of its current speed is formed and the initial velocity of the projectile is calculated based on the set delay of the start of its observation relative to the moment of departure from the gun’s barrel , for each position in the obtained sequence of discrete values of the current velocity of the projectile, the reliability of the data contained in them is evaluated and, taking into account the In the given results, a section is selected in this sequence, which contains mainly reliable data by which the initial velocity of the projectile is determined, while when evaluating the reliability of data on the current velocity of the projectile, criteria are used that take into account the requirements for the accuracy of measuring the initial velocity of the projectile; when forming a section of the mentioned sequence for calculating the initial velocity of the projectile, the beginning of this section is determined by the presence of at least three consecutive positions with reliable data, and its end by the presence of two or more positions with false data; used to calculate the initial velocity of the projectile, the delay time of the start of the observation is the sum of the set delay and the total duration of the implementation of the Doppler echo signal preceding the first position in the data area formed to calculate the initial velocity of the projectile; if there are single positions with inaccurate data in a selected section of the sequence of discrete values of the current projectile velocity, the data contained in such single positions is replaced by the average value of reliable data from two positions of this section directly adjacent to them, the accuracy of the data on the current velocity of the projectile is checked the signal-to-noise ratio of its value, which is necessary to ensure a given accuracy of determining the initial velocity of the projectile, reliability d data on the current velocity of the projectile is estimated from changes in the values of the current velocity of the projectile presented at adjacent positions in the obtained sequence, while first, by the magnitude of these changes, zones containing inaccurate data are detected, and then by reliable data obtained from positions directly adjacent to these zones , determine for each position in the detected zone the expected speed values and localize each position with inaccurate data, and those positions for which the lysed changes in the values of the current velocity of the projectile do not exceed the value of the specified error in measuring the initial velocity of the projectile, additionally form an equally Doppler direction in the direction of the projected flight path of the projectile, due to the installation of two meters at equal distances from the projected flight path of the projectile, the maximum radiation patterns of which make an acute angle with the path projectile flight, measure the velocity of the projectile with each meter, the measurement results are compared and according to the results of average neniya judge finding shells on the intended flight path.

A device for measuring the velocity of a projectile, comprising a first calculator, a first driver for implementing the Doppler echo signal and a first driver for discrete values of the current projectile speed, as well as a series driver for a pulse of a photo start and a timer, the output of which is connected to the second input of the first driver for implementing a Doppler echo signal, the second timer input is connected to the initial delay time sensor, and the third timer input is connected to the second output of the first the first Doppler radar, the first implementation counter, the first buffer memory, the first data reliability analyzer, the first data generator for calculating the initial velocity, the first meter for the total duration of the initial implementations and the first adder, with one output of the first generator of discrete values of the current projectile speed and the output of the first the implementation counter is connected to data input inputs of the first buffer storage device, the recording control input of which, together with the input of the first counter of implementations is connected to the second output of the first shaper of discrete values of the current velocity of the projectile, and the data output of the first buffer storage device is connected to the input of the first analyzer of data reliability, which is connected to the first input of the first calculator through the first shaper of data for calculating the initial velocity, the second input which is connected to the first adder, the first input of which is connected to the initial delay time sensor, and the second input through the first meter the total duration of the initial implementations is connected to the second output of the first data shaper for calculating the initial velocity, further comprises a second Doppler radar, a second shaper of realization of the Doppler echo signal and a second shaper of discrete values of the current projectile speed, a second implementation counter, a second buffer memory, and a second data reliability analyzer, the second data generator for calculating the initial speed, the second an integer of the total duration of the initial implementations and a second adder, while one output of the second shaper of discrete values of the current velocity of the projectile and the output of the second implementation counter are connected to the data input inputs of the second buffer memory, the recording control input of which, together with the counting input of the second implementation counter, is connected to the second output the second shaper of discrete values of the current velocity of the projectile, and the data output of the second buffer storage device is connected to the input W a second data reliability analyzer, which is connected through the second data generator to calculate the initial speed to the first input of the second calculator, the second input of which is connected to the second adder, the first input of which is connected to the initial delay time sensor, and the second input through the second meter of the total duration of the initial implementations is connected with the second output of the second driver for calculating the initial speed, the input of the second driver for the implementation of the Doppler echo is connected to the output ode of the timer, the output of the second Doppler radar is connected to the input of the second driver of the implementation of the Doppler echo signal, the outputs of the first and second computers are connected to the inputs of the comparison device, the output of which is the output of the device.

The drawing shows a structural diagram of the proposed device for measuring the velocity of the projectile, where

1, 23 - calculators;

2, 15 - shapers of implementations of the Doppler signal;

3, 16 - shapers of discrete values of the current velocity of the projectile;

4 - photo-start pulse shaper;

5 - timer;

6 - sensor initial delay time;

7, 14 - Doppler radars;

8, 17 - implementation counters;

9, 18 - buffer storage devices;

10, 19 - data reliability analyzers;

11, 20 - data shapers for calculating the initial speed;

12, 21 - meters of the total duration of the initial implementations;

13, 22 - adders;

24 is a comparison device.

A device for measuring the velocity of the projectile comprises a first 1 calculator, a first 2 shaper of realization of the Doppler echo signal and a first 3 shaper of discrete values of the current projectile speed, as well as a series shaper 4 of a photo start pulse and a timer 5, the output of which is connected to the second input of the first 2 shaper implementation of the Doppler echo, the second input of timer 5 is connected to the sensor 6 of the initial delay time, and the third input of timer 5 is connected to the second output the first 7 Doppler radars, the first 8 implementations counter, the first 9 buffer memory, the first 10 data reliability analyzer, the first 11 data generator for calculating the initial speed, the first 12 meter for the total duration of the initial implementations and the first 13 adder, with one output of the first 3 a shaper of discrete values of the current velocity of the projectile and the output of the first 8 implementation counter are connected to the data input inputs of the first 9 buffer memory, the recording control input is In conjunction with the counting input of the first 8 implementation counter, it is connected to the second output of the first 3 shaper of discrete values of the current projectile velocity, and the data output of the first 9 buffer storage device is connected to the input of the first 10 data reliability analyzer, which is connected through the first 11 shaper to calculate the initial speed to the first input of the first 1 calculator, the second input of which is connected to the first 13 adder, the first input of which is connected to the sensor 6 of the initial delay time, and the second the first input through the first 12 meter of the total duration of the initial implementations is connected to the second output of the first 11 data shapers to calculate the initial speed, as well as the second 14 Doppler radar, connected in series, the second 15 shaper implementation of the Doppler echo signal and the second 16 shaper discrete values of the current speed projectile, the second 17 implementation counter, the second 18 buffer storage device, the second 19 data reliability analyzer, the second 20 data shaper to calculate on total velocity, the second 21 meter of the total duration of the initial implementations and the second 22 adder, while one output of the second 16 shaper of discrete values of the current velocity of the projectile and the output of the second 17 counter implementations are connected to the data input inputs of the second 18 buffer storage device, the recording control input of which together with the counting input of the second 17 implementation counter is connected to the second output of the second 16 shaper of discrete values of the current velocity of the projectile, and the data output of the second 18 buffer the blame device is connected to the input of the second 19 data reliability analyzer, which through the second 20 data generator for calculating the initial speed is connected to the first input of the second 23 calculator, the second input of which is connected to the second 22 adder, the first input of which is connected to the sensor 6 of the initial delay time, and the second input through the second 21 meter of the total duration of the initial implementations is connected to the second output of the second 20 data shaper to calculate the initial speed, the input of the second 15 I implement Doppler echo is connected to the output of the timer 5, the output 14 of the second Doppler radar is connected to the input of the second shaper 15 implementing Doppler echo signal outputs of the first 1 and second calculators 23 connected to the inputs of the comparison means 24 whose output is an output device.

A device for measuring the velocity of the projectile operates as follows. The measurement of the velocity of the projectile is carried out simultaneously by the first 7 and second 14 Doppler radars located at equal distances from a given trajectory of the projectile and the maximum radiation patterns of which make sharp angles with it. The output signal of the first 7 and second 14 Doppler radars is determined by the velocity of the projectile and the angles between the path of the projectile and its line of sight for each Doppler radar. When flying a projectile along a given path, these angles are equal, and therefore, the Doppler frequencies of the signals received by the first 7 and second 14 Doppler radars are equal. This direction can be called equally Doppler. When deviating from a given flight path, this equality is violated. The principle of measuring the velocity of the projectile is as follows. The signals from the outputs of the first 7 and second 14 Doppler radars are received respectively through the first 2 and second 15 shapers of implementations of the Doppler signal, to the inputs of the first 3 and second 16 shapers of discrete values of the current velocity of the projectile, the output signals of which are stored in the first 9 and second 18 buffer storage devices . Under the action of the signals from the outputs of the first 8 and second 17 implementation counters, the first 9 and second 18 buffer memory devices provide signals to the first 10 and second 19 analyzers of the reliability of the implementations, where they are analyzed and fed to the inputs of the first 11 and second 20 data shapers to calculate the initial speed. The signals from the outputs of the first 11 and second 20 shapers for calculating the initial speed are fed to the inputs of the first 1 and second 23 calculators, the outputs of which are fed to the inputs of the comparison device 24. At the output of the comparison device 24, a signal is generated informing about the location of the projectile on a given path.

Claims (1)

The method of measuring the velocity of the projectile, which consists in the fact that the measurement of the velocity of the projectile is carried out by the first meter of the velocity of the projectile with the first Doppler radar, characterized in that a second speed meter with a second Doppler radar is introduced, while the first and second Doppler radars of the indicated velocity meters of the projectile are formed in the direction a predetermined projectile flight path equal to the Doppler direction due to their installation at equal distances from a given projectile flight path, and the maximums of the radiation patterns of the first and second Doppler radars are an acute angle with the projectile path of the projectile, in each projectile velocity meter the Doppler frequencies of the output signals of the first and second Doppler radars form a sequence of discrete values of its current speed, which measure the velocity of the projectile, the measurement results are compared, if the comparison results are equal, it is established that the projectile is on a given path, in case of violation of the equality comparison ultrasonography establish that the projectile deviated from a given trajectory.