Laser Target

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims the benefit and priority of Chinese Patent Application No. 202111567140.3 filed with the China National Intellectual Property Administration on Dec. 20, 2021, the disclosure of which is incorporated by reference herein in its entirety as part of the present application.

TECHNICAL FIELD

The present disclosure relates to the technical field of shooting training, in particular to a laser target.

BACKGROUND

Shooting training is an important part of military training, and shooting personnel need a large amount of shooting training to improve shooting accuracy and emergency response capacity.

In the related technology, a target for shooting usually includes a target surface and a target rod connected with the target surface. Multiple target rings are arranged on the target surface, and the shooting personnel use a shooting tool to shoot the target surface for targeting training

However, in the related technology, after completing targeting every time, the shooting personnel need to manually check a hit position, therefore resulting in a reduction of the efficiency of determining the targeting position.

SUMMARY

In view of the problems existing in the prior art, the present disclosure provides a laser target.

The present disclosure provides a laser target, including a laser target body and two laser transceiving devices, wherein each laser transceiving device comprises a receiver and an emitter opposite to each other;

a plurality of emitting tubes are arranged on the emitter at equal intervals, a plurality of receiving tubes are arranged on the receiver at equal intervals, and the emitting tubes and the receiving tubes are in one-to-one correspondence; and a target distance between two adjacent emitting tubes is smaller than a diameter of a bullet;

laser emitted by the emitter of one of the two laser transceiving devices is vertical to laser emitted by the emitter of an other of the two laser transceiving devices to form a laser net; and

a target surface of the laser target body is arranged in a direction along a vertical projection of the laser net, and is parallel to the vertical projection.

According to a further embodiment, the laser target is provided, wherein the plurality of emitting tubes are arranged on the emitter in two rows, and the two rows of emitting tubes are arranged in a staggered manner.

According to a further embodiment, the laser target is provided, wherein the plurality of receiving tubes are arranged on the receiver in two rows, and the two rows of receiving tubes are arranged in a staggered manner.

According to a further embodiment, the laser target further including a laser target circuit connected with each laser transceiving device,

wherein the laser target circuit is configured for receiving pulse signals sent by each receiving tube and determining a position on the laser target at which the bullet passes through the target surface based on each pulse signal.

According to a further embodiment, the laser target is provided, wherein each laser target circuit includes an amplifying circuit, an isolation circuit and an operational circuit, and the amplifying circuit is connected with the operational circuit through the isolation circuit;

the amplifying circuit is configured for amplifying the pulse signals sent by each receiving tube and sending each amplified pulse signal to the isolation circuit;

the isolation circuit is configured for carrying out signal isolation processing on each amplified pulse signal to obtain each target signal after isolation processing, and sending each target signal to each input channel of the operational circuit; and

the operational circuit is configured for detecting a level signal of the target signal received by each input channel and determining the position on the laser target at which the bullet passes through the target surface based on the level signal of each input channel.

According to a further embodiment, the laser target is provided, wherein each output end of the amplifying circuit is provided with a first light emitting diode.

According to a further embodiment, the laser target is provided, wherein the isolation circuit includes an isolation chip, and an output end of each isolation chip is provided with a second light emitting diode.

According to a further embodiment, the laser target is provided,

wherein the operational circuit is configured for determining, when having determined that the target signal of a current input channel is a low-level signal, whether the target signal of a next input channel is a low-level signal or not;

when it is determined that the target signal of the next input channel is a non-low-level signal, a channel number of the current input channel is multiplied by a preset value to obtain a first target value, and the first target value is sent to a computer device, so that the computer device determines the position on the laser target at which the bullet passes through the target surface based on the first target value; and

when it is determined that the target signal of the next input channel is a low-level signal, the channel number of the current input channel is multiplied by the preset value plus to one to obtain a second target value, and the second target value is sent to the computer device, so that the computer device determines the position on the laser target at which the bullet passes through the target surface based on the second target value.

According to a further embodiment, the laser target is provided, wherein each laser target circuit further includes an emitting circuit; and

the emitting circuit is configured for supplying power for each emitting tube.

According to the laser target provided by the present disclosure, the laser net is formed by the laser emitted by the two emitters, and the bullet passes through the laser net and then is emitted towards the target surface of the laser target body. The bullet shields the laser at the corresponding position when passing through the laser net, so the pulse signal can be generated on the corresponding receiving tube of the receiver; for other unshielded laser, the corresponding receiving tube does not generate any signal, so that the position on the laser target at which the bullet passes through the target surface can be determined based on whether each receiving tube generates the pulse signal or not, without a user to manually check the shooting position, and therefore improving the efficiency of determination of the targeting position.

BRIEF DESCRIPTION OF THE DRAWINGS

To illustrate technical solutions in the present disclosure or in the prior art more clearly, accompanying drawings required for describing embodiments or the prior art will be described briefly below. Apparently, the accompanying drawings described below show some embodiments of the present disclosure, and those skilled in the art can still derive other figures from these accompanying drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a laser target in accordance with the present disclosure;

FIG. 2 is a schematic structural diagram of an emitter in accordance with the present disclosure;

FIG. 3 is a circuit principle diagram of a laser target in accordance with the present disclosure; and

FIG. 4 is a schematic circuit diagram of in-phase operational amplifier chips in accordance with the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make objects, technical solutions, and advantages of the present disclosure better understood, the technical solutions in the present disclosure will be described clearly and completely below with reference to the accompanying drawings of the present disclosure. Apparently, the described embodiments are a part thereof but not all the embodiments of the present disclosure. Based on the embodiment in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts falls within the scope of the present disclosure.

A laser target in the present disclosure is described below in conjunction with FIG. 1 to FIG. 4.

FIG. 1 is a schematic structural diagram of a laser target in accordance with the present disclosure. As shown in FIG. 1, the laser target includes a laser target body and two laser transceiving devices, wherein each laser transceiving device includes a receiver 1 and an emitter 2 opposite to each other.

Multiple emitting tubes 21 are arranged on the emitter 2 at equal intervals, multiple receiving tubes 11 are arranged on the receiver 1 at equal intervals, and the emitting tubes 21 and the receiving tubes 11 are in one-to-one correspondence; and a target distance between two adjacent emitting tubes 21 (a distance between centers of two adjacent emitting tubes 21) is smaller than a diameter of a bullet.

Laser emitted by the emitter 2 of one laser transceiving device is vertical to laser emitted by the emitter 2 of the other laser transceiving device to form a laser net; and a target surface 3 of the laser target body is arranged in a direction vertical to a projection of the laser net.

The laser target body includes a target surface 3 and a target rod connected with the target surface 3, and multiple target rings 31 are arranged on the target surface 3; and each emitting tube 21 generates invisible light with a certain wavelength such as 1000 nanometers, which is irradiated on the opposite receiving tube 11.

As an example, the two laser transceiving devices are respectively a first laser transceiving device and a second laser transceiving device, wherein the first laser transceiving device includes a first emitter and a first receiver opposite to each other, and the second laser transceiving device includes a second emitter and a second receiver opposite to each other. Each receiving tube of the first receiver is used for receiving laser emitted by a respective emitting tube of the first emitter; and each receiving tube of the second receiver is used for receiving laser emitted by a respective emitting tube of the second emitter, and the laser emitted by the first emitter is perpendicular to the laser emitted by the second emitter, so that a laser net (formed through perpendicular intersection of the laser along two coordinate axes) can be formed, and the bullet passes through the laser net and then strikes the target surface. In this way, when the bullet passes through the laser net, laser emitted by one or two emitting tubes 21 is shielded in each coordinate axis direction. At an end of the receiver 1, the receiving tube 11 corresponding to the shielded laser generates a low pulse signal, and the receiving tube 11 corresponding to the unshielded laser does not generate any signal, so that the position on the laser target at which the bullet passes through the target surface 3 can be determined based on whether each receiving tube 11 in the two receivers 1 generates a pulse signal or not, implementing determination of the targeting position.

According to the laser target provided by the present disclosure, the laser net is formed by the laser emitted by the two emitters, and the bullet passes through the laser net and then is emitted towards the target surface of the laser target body. Because the bullet shields the laser at the corresponding position when passing through the laser net, the pulse signal can be generated on the corresponding receiving tube of the receiver; whereas, for other unshielded laser, the corresponding receiving tube does not generate any signal, so that the position on the laser target at which the bullet passes through the target surface can be determined based on whether each receiving tube generates the pulse signal or not, and a user does not need to manually check the hit position, therefore improving the efficiency of determining the targeting position.

Optionally, FIG. 2 is a schematic structural diagram of an emitter in accordance with the present disclosure. As shown in FIG. 2, the multiple emitting tubes 21 are arranged on the emitter 2 in two rows, and the two rows of emitting tubes 21 are arranged in a staggered manner.

The numbers of the emitting tubes 21 arranged on the first emitter and the second emitter are the same, and the distances between the adjacent emitting tubes 21 of the first emitter are equal, and the distances between the adjacent emitting tubes 21 in the second emitter are also equal. For example, each of the first emitter and the second emitter is provided with 125 emitting tubes 21, and the 125 emitting tubes 21 are aligned in two rows, as shown in FIG. 2. For each row of emitting tubes 21, the distance between the adjacent emitting tubes 21 is 8 millimeters (mm), and a staggered spacing is 4 mm. That is, the staggered spacing is a horizontal spacing.

According to the laser target provided by the present disclosure, the multiple emitting tubes are arranged on the emitter in two rows at equal intervals, and the two rows of emitting tubes are arranged in a staggered manner, so that a density of the laser net can be increased, in order to improve the accuracy of the finally determined position of the bullet on the target surface.

Optionally, the multiple receiving tubes 11 are arranged on the receiver 1 in two rows, and the two rows of receiving tubes 11 are arranged in a staggered manner.

As an example, the receiving tubes 11 and the emitting tubes 21 are in one-to-one correspondence, and therefore, the arrangement of the receiving tubes 11 is the same as that of the emitting tubes 21, namely, the numbers of the receiving tubes 11 arranged on the first receiver and the second receiver are the same. Moreover, the distances between the adjacent receiving tubes 11 are also equal. For example, each of the first receiver and the second receiver is provided with 125 receiving tubes 11, the 125 receiving tubes 11 are aligned in two rows. For each row of receiving tubes 11, the distance between the adjacent receiving tubes 11 is 8 mm, and the staggered spacing is 4 mm, so that the laser emitted by the two laser transceiving devices can form the laser net. The laser net is equivalently composed of multiple small grids of the same size, that is, a coordinate plane composed of an X axis and a Y axis is formed, and multiple small grids of the same size are arranged on the coordinate plane. When the bullet passes through the laser net, it is necessary to generate signals in the X-axis and the Y-axis directions, so that the position of the bullet on the target surface can be determined based on the signals in the X-axis and the Y-axis directions.

According to the laser target provided by the present disclosure, the multiple receiving tubes are arranged on the receiver in two rows at equal intervals, and the two rows of receiving tubes are arranged in a staggered manner, so that the accuracy of the finally determined targeting position can be improved.

Optionally, the laser target further includes a laser target circuit connected with each laser transceiving device.

The laser target circuit is used for receiving a pulse signal sent by each receiving tube 11 and determining the position on the laser target at which the bullet passes through the target surface based on each pulse signal.

As an example, the laser target circuit is configured for receiving pulse signals sent by each receiving tube 11, and the position on the laser target at which the bullet passes through the target surface 31 can be determined by monitoring the receiving tube 11 generating the low pulse signal.

According to the laser target provided by the present disclosure, the laser target circuit is adopted to automatically determine the position on the laser target at which the bullet passes through the target surface, without manual determination, thus improving the efficiency of determination of the targeting position.

Optionally, FIG. 3 is a circuit principle diagram of a laser target in accordance with the present disclosure. As shown in FIG. 3, each laser target circuit includes an amplifying circuit 4, an operational circuit 5 and an isolation circuit 6, and the amplifying circuit 4 is connected with the operational circuit 5 through the isolation circuit 6.

The amplifying circuit 4 is configured for amplifying the pulse signals sent by each receiving tube 11 and sending each amplified pulse signal to the isolation circuit 6.

The isolation circuit 6 is configured for carrying out signal isolation processing on each amplified pulse signal to obtain each target signal after isolation processing, and sending each target signal to each input channel of the operational circuit 5.

The operational circuit 5 is configured for detecting a level signal of the target signal received by each input channel and determining the position on the laser target at which the bullet passes through the target surface 31 based on the level signal of each input channel.

As an example, the amplifying circuit 4 can be composed of multiple in-phase operational amplifier chips. For example, an in-phase operational amplifier chip with the model OPA4228 is adopted, the chip is a four-channel high-speed operational amplifier chip, and has a switching frequency which can reach up to 33 MHz (Megahertz). And the chip has high input impedance, and is effective for a circuit with large output impedance, and can meet actual use requirements of the laser target. FIG. 4 is a schematic circuit diagram of the in-phase operational amplifier chips in accordance with the present disclosure. As shown in FIG. 4, R1 is 100 Ohm, Rf is 20 Kilo-ohm (K), the magnification factor is about 200 times, +5 V(volt) and −5 V are used for power supply, the output low level is about 0.1 V, and the output high level is about 3.5 V.

In actual use, if the in-phase operational amplifier chip (with four channels) with the model OPA4228 is used, the number of the receiving tubes 11 in each receiver 1 is 125, each receiver 1 correspondingly needs 32 in-phase operational amplifier chips with the model OPA4228, and at least 64 in-phase operational amplifier chips with the model OPA4228 are needed in total in the present disclosure.

The isolation circuit 6 can adopt a magnetic coupling isolation chip ADUM1410 commercially available from Analog Devices Inc. A data rate of the magnetic coupling isolation chip ADUM1410 can reach up to 10 Mbps at most. The magnetic coupling isolation chip ADUM1410 includes four input and output channels. Each isolation input end is provided by the amplifying circuit 4 with signals and power, and the power supply is 5V. Each isolation output end is connected with the operational circuit 5, and the operational circuit 5 provides a 3.3 V power supply for the isolation output end.

In actual use, if the magnetic coupling isolation chip with the model ADUM1410 is adopted, and the number of the in-phase operational amplifier chips with four channels in each detection circuit is 32, 32 magnetic coupling isolation chips with the model ADUM1410 are correspondingly needed, and at least 64 magnetic coupling isolation chips with the model ADUM1410 are needed in total in the present embodiment.

In case that the isolation circuit 6 includes magnetic coupling isolation chips with the model ADUM1410, the input and output ends of each magnetic coupling isolation chip with the model ADUM1410 also need to be coded. The input end numbered 1 of the magnetic coupling isolation chip with the model ADUM1410 is connected with the output end numbered 1 of the in-phase operational amplifier chip with the model OPA4228. The output end numbered 1 of the magnetic coupling isolation chip with the model ADUM1410 is connected with the input end numbered 1 of the chip with the model EP4CE10F17. The remaining parts numbered of each part are sequentially connected according to a manner of the corresponding numbers until all the parts numbered are connected. The connection manner of each part of the other coordinate axis is the same as that of each part of the coordinate axis.

Because the use principle of the laser target is a multi-channel parallel trigger mode, and the response speed is required to be extremely high, the operational circuit 5 can adopt Field Programmable Gate Array (FPGA) chips. A specific model can be EP4CE10F17, and 179 IO (input/output) ports can be used for each chip with the model EP4CE10F17. Each chip with the model EP4CE10F17 has a square shape with side lengths of 17 mm, and is packaged by means of a Ball Grid Array (BGA), which has an input frequency of 50 Megahertz (Mhz) and an internal phase-locked loop that can reach up to 100 Mhz, and yet the bullet passing time is about 10 μs (microseconds), so the chip with the model EP4CE10F17 meets the use requirements.

In addition, because the laser target needs more input and output ports (250 paths in total in two mutually perpendicular directions), the number of the operational circuits 5 is two according to the present application. Each operational circuit 5 processes 125 paths of signals. The two operational circuits 5 both adopt FPGA chips, one is a master FPGA chip, the other is a slave FPGA chip, and the two FPGA chips are connected through eight paths of parallel buses. The slave FPGA chip detects the level signal of the amplified pulse signal received by each input channel, and sends the channel number of the detected low-level signal to the master FPGA chip as a first detection result. The master FPGA chip detects the level signal of the amplified pulse signal received by each input channel of the master FPGA chip, takes the channel number of the detected low-level signal as a second detection result, and determines the position on the laser target at which the bullet passes through the target surface based on the second detection result of the master FPGA chip and the first detection result received from the slave FPGA chip. Alternatively, both the first detection result and the second detection result may also be transmitted to a computer device, which determines the position on the laser target at which the bullet passes through the target surface 31 based on the first detection result and the second detection result.

When the amplifying circuit 4 includes multiple in-phase operational amplifier chips with the model OPA4228, the operational circuit 5 includes the chip with the model EP4CE10F17, and the isolation circuit 6 includes the magnetic coupling isolation chip with the model ADUM1410, the specific connection relation of the parts can be realized in the following manner.

Each emitting tube 21, each receiving tube 11, the input and output ends of each in-phase operational amplifier chip with the model OPA4228, the input and output ends of the magnetic coupling isolation chips with the model ADUM1410 and the input end of the chip with the model EP4CE10F17 are all numbered in advance in a one-to-one correspondence manner. For example, the number of the emitting tubes 21 of each coordinate axis is 125, the number of the receiving tubes 11 of each coordinate axis is 125, so that the 125 emitting tubes 21 are respectively numbered from 1 to 125, and the 125 receiving tubes 11 are respectively numbered from 1 to 125. The input and output ends of the in-phase operational amplifier chip with the model OPA4228 are also respectively numbered from 1 to 125, the input and output ends of the magnetic coupling isolation chip with the model ADUM1410 are also respectively numbered from 1 to 125, and the input ends of the chips with the model EP4CE10F17 are also respectively numbered from 1 to 125. During connection, the emitting tube numbered 1 corresponds to the receiving tube numbered 1, the receiving tube numbered 1 is connected with the input end numbered 1 of the in-phase operational amplifier chip with the model OPA4228, and the output end numbered 1 of the in-phase operational amplifier chip with the model OPA4228 is connected with the input end numbered 1 of the magnetic coupling isolation chip with the model ADUM1410, and the output end numbered 1 of the magnetic coupling isolation chip with the model ADUM1410 is connected with the input end numbered 1 of the chip with the model EP4CE10F17. The remaining parts numbered of each part are sequentially connected according to a manner of the corresponding numbers until all the parts numbered are connected. The connection mode of each part of the other coordinate axis is the same as that of each part of the coordinate axis.

Based on the above connection relation, when the FPGA chip detects that the level signal of the current input channel is a low-level signal, the channel number of the current input channel is equivalent to the number of the receiving tube or the number of the emitting tube, and then the position on the laser target at which the bullet passes through the target surface 31 can be determined based on the number of the receiving tube or the number of the emitting tube on the two coordinates axes.

Optionally, each output of the amplifying circuit 4 is provided with a first light emitting diode, namely a light emitting diode (LED) indicating lamp. And the LED indicating lamp is normally on when the laser light is not shielded by the bullet; and when the laser is shielded by the bullet, the shielded receiving tube 11 generates a low-level signal, and the LED indicating lamp is turned off. In addition, all the receiving tubes 11 are directly welded on circuit boards, and the receiving tubes 11 generate pulse signals which are directly input to the amplifying circuits 4, so that the circuit boards of the amplifying circuits 4 can be arranged inside the target rod 12, and each path of signals is led out by a special cable.

According to the laser target provided by the present disclosure, the pulse signal sent by each receiving tube is amplified by adopting the amplifying circuit, so that the pulse signal is enhanced, and the position of the bullet on the target surface is conveniently determined subsequently based on the amplified pulse signal; and the isolation circuit is used for carrying out signal isolation process on each received amplified pulse signal so as to ensure that the signal is not disturbed by external factors.

Optionally, the isolation circuit 6 includes an isolation chip, and the output end of each isolation chip is provided with a second light emitting diode.

It needs to be stated that in actual use, the isolation circuit 6 and the operational circuit 5 need to be arranged in a control box of target machine which is arranged outside the target rod. Because of a limited volume of the control box of target machine, the circuit board of each isolation circuit 6 is evenly divided into three blocks for the two isolation circuits 6, wherein the circuit board of each of two blocks of the isolation circuit 6 is provided with 42 channels, the circuit board of another block of the isolation circuit 6 is provided with 41 channels, with a total of 125 channels. Each isolation circuit 6 processes the amplified pulse signals of 125 channels.

In addition, because the circuit board of the amplifying circuit 4 is placed inside the target rod, and after installation and debugging, the LED indicating lamp in the amplifying circuit cannot be seen by the use, a LED indicating lamp is connected in parallel to the output end of each isolation chip.

It needs to be noted that the specific circuit connection relation among the in-phase operational amplifier chip with the model OPA4228, the magnetic coupling isolation chip with the model ADUM1410 and the chip with the model EP4CE10F17 can be referred to the prior art, and the present disclosure is not repeated herein.

According to the laser target provided by the present disclosure, the output end of each isolation chip is connected with a LED indicating lamp in parallel, facilitating the user to observe collected results.

Optionally, the operational circuit 5 is specifically configured for determining, when having determined that the target signal of a current input channel is the low-level signal, whether the target signal of a next input channel is a low-level signal or not.

When it is determined that the target signal of the next input channel is a non-low-level signal, the channel number of the current input channel is multiplied by a preset value to obtain a first target value, and the first target value is sent to a computer device, so that the computer device determines the position on the laser target at which the bullet passes through the target surface 31 based on the first target value.

As an example, for the master FPGA chip and the slave FPGA chip, the master FPGA chip monitors simultaneously multiple paths of target signals received (such as 125 paths of target signals). When the bullet passes through the target surface 31, the laser emitted by the emitting tube 21 is shielded. At the moment, the corresponding receiving tube 11 generates a falling edge (a low-level signal), and then the falling edge is processed by the amplifying circuit 4 and the isolation circuit 5 and transmitted to the master FPGA chip. If the master FPGA chip collects the falling edge on the current input channel, the channel number of the current input channel is recorded.

As an example, the slave FPGA chip monitors multiple paths of received target signals (such as 125 paths of target signals) at the same time. When the bullet passes through the target surface 31, the laser emitted by the emitting tube 21 is shielded. At the moment, the corresponding receiving tube 11 generates a falling edge (a low-level signal), and then the falling edge (the low-level signal) is processed by the amplifying circuit 4 and the isolation circuit 5 and transmitted to the master FPGA chip. If the slave FPGA chip collects the falling edge on the current input channel, the channel number of the current input channel is recorded.

As an example, because the case that the bullet shields simultaneously the laser emitted by two emitting tubes 21 is present, when the slave FPGA chip detects that the target signal of the current input channel is a low-level signal, it is also necessary to detect whether the target signal of the next input channel is a low-level signal or not. When it is determined that the target signal of the next input channel is a non-low-level signal, it is indicated that the bullet only shields the laser of one emitting tube 21. At the moment, the slave FPGA chip is used for multiplying the channel number of the current input channel by a preset value to obtain a first target value, and the first target value is sent to the master FPGA chip. The master FPGA chip also detects that the target signal of the next input channel is a non-low-level signal, and so the channel number of the current input channel of the master FPGA chip needs to be multiplied by the preset value to obtain a third target value, and finally the first target value and the third target value are sent to the computer device together. When the computer device receives the first target value and the third target value, the first target value is divided by the preset value to obtain an integer. The third target value is divided by the preset value, an integer is also obtained, and it is determined that the bullet shields only the laser of one emitting tube along the two coordinate axes. For example, the bullet shields only the laser of the emitting tube numbered 2, the preset value is 2, and then the first target value is 4. The computer device is used for dividing the first target value of 4 by 2 to be 2, indicating that the bullet shields only the laser of the emitting tube numbered 2. Therefore, when the preset value is 2, the valid data which can be sent by the 125 paths of target signals is 0 to 250.

When the computer device determines the number of the emitting tube shielded by the bullet on each coordinate axis, the position on the laser target at which the bullet passes through the laser net can be determined based on the number of the emitting tube on the X coordinate axis and the number of the emitting tube on the Y coordinate axis, and the plane projection surface of the laser net is the target surface. Therefore, the position on the laser target at which the bullet passes through the target surface can be determined based on the number of the emitting tube on the X coordinate axis and the number of the emitting tube on the Y coordinate axis. For example, if the number of the emitting tube on the X coordinate axis is 2 and the number of the emitting tube on the Y coordinate axis is 4, the position where the coordinate point is (2, 4) is the position on the laser target at which the bullet passes through the target surface.

It needs to be noted that the master FPGA chip sends corresponding data to the computer device through an asynchronous serial port, the Baud rate of the asynchronous serial port can be 19200, the communication format of the asynchronous serial port is FF for the first byte, the second byte and the third byte are a first target value and a third target value of the two coordinates axes respectively, and the last byte is the check.

According to the laser target provided by the present disclosure, when it is determined that the target signal of the current input channel is the low-level signal, the level signal of the target signal of the next input channel is detected, so that the number of lasers of the emitting tube shielded by the bullet is determined.

Optionally, the operational circuit 5 is further configured for multiplying the channel number of the current input channel by a preset value and adding one to obtain a second target value when it is determined that the target signal of the next input channel is a low-level signal, and the second target value is sent to the computer device, so that the computer device determines the position where the bullet passes through the target surface based on the second target value.

As an example, when the slave FPGA chip determines that the target signal of the next input channel is a low-level signal, it is indicated that the bullet shields the laser of the two emitting tubes at the same time. At the moment, the slave FPGA chip is configured for multiplying the channel number of the current input channel by a preset value and then adding one to obtain a second target value, and the second target value is sent to the master FPGA chip. The master FPGA chip also detects that the target signal of the next input channel is a low-level signal, so that the channel number of the current input channel of the master FPGA chip is multiplied by the preset value and then added by one to obtain a fourth target value, and finally the second target value and the fourth target value are sent to the computer device together. When the computer device receives the second target value and the fourth target value, the second target value is divided by the preset value to obtain a decimal. The fourth target value is divided by the preset value, a decimal is also obtained, and it is determined that the bullets on the two coordinate axes shield the laser of the two emitting tubes at the same time. For example, the bullet shields both the emitting tube numbered 2 and the emitting tube numbered 3, the preset value is 2, and then the second target value is 5. The computer device is configured for dividing the second target value of 5 by 2 to be 2.5, indicating that the bullet shields both the emitting tube numbered 2 and the emitting tube numbered 3.

When the computer device determines the number of the emitting tube shielded by the bullet on each coordinate axis, the position on the laser target at which the bullet passes through the laser net can be determined based on the number of the emitting tube on the X coordinate axis and the number of the emitting tube on the Y coordinate axis, and the plane projection surface of the laser net is the target surface. Therefore, the position on the laser target at which the bullet passes through the target surface can be determined based on the number of the emitting tube on the X coordinate axis and the number of the emitting tube on the Y coordinate axis. For example, the numbers of the two emitting tubes on the X coordinate axis are respectively 2 and 3, and the numbers of the two emitting tubes on the Y coordinate axis are respectively 4 and 5, the mean value of 2 and 3 is 2.5 which can be as the position of the X coordinate, the mean value of 4 and 5 is 4.5 which can be as the position of the Y coordinate, and the position of the coordinate point (2.5, 4.5) is the position on the laser target at which the bullet passes through the target surface.

According to the laser target provided by the present disclosure, the condition that the bullet shields the laser of the two emitting tubes at the same time is considered, so that the finally determined position of the bullet on the target surface is more accurate.

Optionally, each laser target circuit further includes an emitting circuit.

The emitting circuit is configured for supplying power for each emitting tube.

As an example, the emitting circuit supplies 5V voltage for each emitting tube so as to ensure normal operation of each emitting tube.

Through the above description of the embodiments, those skilled in the art can clearly understand that the various embodiments can be implemented by way of software plus a necessary general purpose hardware platform, or an alternative hardware. Based on such an understanding, the technical solutions of the present disclosure essentially or the part contributing to the prior art can be embodied in a form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM/RAM, a magnetic disk, or an optical disc, and includes several instructions for instructing a computer device (which may be a personal computer, a server, or a network device) to perform the methods described in the embodiments or some parts of the embodiments of the present disclosure.

The foregoing embodiments are merely intended to describe the technical solutions of the present disclosure, but not to limit the present disclosure. Although the present disclosure is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Laser Target

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