SU670806A1 - Device for locating an object - Google Patents

Description

one

The invention relates to a measurement technique and can be used in instruments for automatically registering hits on a target when firing from a pneumatic and firearms sporting weapon.

Devices for determining the location of objects are known, containing a source of scanning radiation and a block of photodetectors.

The closest in technical essence is a device containing two measuring channels, a discrepancy indication unit, the input of which is connected to the outputs of measuring channels, a coordinate recorder, the input of which is connected to the output of the error indicator, each measuring channel contains a differential position-sensitive photodetector and two measuring circuits connected to the outputs of a position-sensitive photodetector and including an l-cascade amplifier and peak detectors, each of which is connected to the output of the corresponding amplifier stage.

A disadvantage of the known device lies in the low dynamic accuracy and is due to the inertia of the automatic gain control unit, which

adapted to work with periodic signals. Since the passage of the object through the target plane is a one-time process, only one radiation pulse arrives at the input of the receiver, and the automatic gain control unit does not have time to set the required amplification of amplifiers, as a result of which the position of the object is not accurately determined.

The aim of the invention is to improve the accuracy of determining the location of the object.

For this, in the proposed device, each measuring circuit is equipped with

a block of threshold elements, the inputs of which are connected to the outputs of the amplifier stages, a register of the order, the inputs of which are connected to the outputs of the block of threshold elements, an order decoder, inputs

which are connected to the outputs of the register of the order, and n controlled voltage dividers, the information input of each of which is connected to the output of the corresponding peak detector, the control

the inputs are with the order descriptor outputs, and the outputs are the outputs of the measurement circuit.

The drawing shows a block diagram of the proposed device for determining the location of an object.

The device for determining the location of the object contains two measuring channels 1 and 2, a block 3 of the error indication, the inputs of which are connected to the outputs of measuring channels 1 and 2, and the outputs are connected to the inputs of the recorder 4 coordinates. Each of measuring channels 1 and 2 contains a differential position-sensitive photon receiver 5 and two measuring circuits 6 and 7 connected to the outputs of photon receiver 5 and including a cascade amplifier with stages 8, 9 and 10 of amplification and peak detectors II, 12 and 13, each of which is associated with the output of the respective amplifier stage 8, 9, and 10. Each measuring circuit 6 and 7 is equipped with a block of 14 threshold elements, the inputs of which are connected to the outputs of the stages 8, 9 and 10 of the gain. The outputs of the blocks 14 are connected to the inputs of the 15-order registers connected by their outputs with the inputs of the decipherors 16-order. In each measuring circuit 6 and 7, the outputs of peak detectors 11, 12, 13 are connected to the information inputs of controlled voltage dividers 17, 18, and 19, the control inputs of which are connected to the outputs of the decryptors 16, and the outputs are connected to the inputs of the error indication unit 3.

Photodetectors 5 are located in front of, with a depiction of a target in a safe area outside the circle of scattering points of objects in the plane of a fixed beam, whose width exceeds the diameter of the target. In the same plane are the optical axes of the lenses that focus the image of the object on the surface of the photodetectors.

A device for determining the location of an object operates as follows.

An object passing through a plane of a target intersects a flat beam and reflects a part of the energy incident on it. On the photodetectors 5, instantaneous images of the object are formed in the form of illuminated surface areas. These images are divided into zones of the photosensitive areas into two parts, equal to each other only if the object is in the center of the target. At the time of passage of the object through the beam at the outputs of the photodetectors 5, pulses with amplitude

ai K, Bli. (1)

where is the integral sensitivity

photodetector; B - image width; 1g is the length of the illuminated parts of the photodetector.

The parameters of the object deviation from the center of the target P and Q, hereinafter referred to as the mismatch parameters, can be calculated by the formulas

J ai -i

(2)

2 ai -t-,

1Дз - «4-г

"3 +" 4

Where

La, -f "2 - Cs-f" 4.

The values of a needed to calculate the parameters P and Q are measured in the device as follows. Pulses with amplitudes a; arrive at the inputs of measuring circuits 6 and 7. If the input signal level is not sufficient to saturate the / -TH amplifier stage 8, 9 and 10, then an input pulse appears at the input of this stage with amplitude

f / 0-. (3)

where / (is the gain of the cascade;

/ - cascade sequence number, counted from the input of the amplifier. If, on the other hand, the / - cascade is saturated with a signal, then the amplitude of the pulse at its output is equal to the voltage of the restriction Wagr. In this case, the threshold element of block 14 associated with this cascade is triggered and a unit is recorded in the corresponding register section 15. Combination of units and

the zeros B of register 15 forms a code of the order / number ui, and the role of its mantissa is performed by the voltage Uij, as follows from expression (3)

a ,, ,, / C - /. (4)

Uij values are stored in peak detectors 11, 12, and 13.

On the basis of the codes / stored in the registers 15, the decipherors of 15 orders form the control signals of the voltage dividers 17, 18 and 19 in accordance with the conditions

Ui Taxi Uij

f / .f / ocp. (5)

The voltage dividers 17, 18, and 19 have an unequal number of fixed values of the transfer coefficients. After each flash of radiation from the object, only

in one of them, a nonzero voltage coefficient is set, the number of this divider and the value of the transmission coefficient is indicated by the decoder 16 in accordance with the table

The voltages selected in each measuring circuit 6 and 7 are reduced to one order, which gives the right to perform addition and subtraction operations on them. Calculation of parameters P and Q from

The formula (2) is performed in the error indication block 3, in the same place the coordinates X and Y of the point of the object’s flight through the target are calculated from the known values of P and Q, and the shooting results are recorded in block 4.

Due to the introduction of controlled voltage dividers, blocks of threshold elements of the order recorders and decoders of the order, the device can locate the object by a single flash of radiation reflected from it without dynamic errors. Due to its high accuracy and speed, the device provides the athlete with the ability to quickly correct shooting at workouts and in the process of zeroing before scoring shots, shortens the time for analyzing results and increases the throughput of the shooting range.

Claims (1)

Invention Formula A device for determining the location of an object, containing two measuring channels, an error indication unit, the input of which is connected to the outputs of the measurement channels, a coordinate recorder, the input of which is connected to the output of the error indication unit, each the measuring channel contains a differential position-sensitive photodetector and two measuring circuits connected to the outputs of the position-sensitive photodetector and including An l-cascade amplifier and p peak detectors, each of which is connected to the output of a corresponding amplifier stage, characterized in that, in order to improve measurement accuracy, each measuring circuit is equipped with a block of threshold elements, whose inputs are connected to the outputs of the amplifier stages, with a register register The inputs of which are connected to the outputs of the block of threshold elements, the order decoder, the inputs of which are connected to the outputs of the register of the order, controlled by voltage dividers, the information input of each of the cat The connectors are connected to the output of the corresponding peak detector, the control inputs to the descrambler outputs are of the order, and the outputs are the outputs of the measuring circuit. sixteen V xVv