JPH02101399A - Firing training effect deciding circuit employing laser beam - Google Patents

Abstract

PURPOSE:To permit the detections and determination of a multitude of informations simultaneously by receiving the light of digital modulation, in which a multitude of informations is coded, in communication effected by the space transmission of laser beams. CONSTITUTION:Laser beams, transmitting digital codes coded so as to be corresponding to the characteristics, effective ranges, range of impact and the like of a firearm, are projected while a plurality of photo detectors 2-11 to 2-1m, having high-sensibility characteristics capable of receiving laser beams from all directions, are mounted on the side of hitting targets. The laser beams are amplified by an amplifier after converting the beams into electricity and are connected to previously set differential amplifiers A, B to take out binary digital electric signals from either one or both of the amplifiers a, B in accordance with the strength of energy of the laser beams. The degree of impact at the side of the targets is classified into a plurality of kinds by combining a plurality of sets of these photo detectors 2-11 to 2-1m while the classified degree of impact is combined with the contents of the codes after determining received codes whereby the degree of damage may be simulated.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a method for receiving a laser beam, which is capable of receiving a spatially transmitted laser beam using a plurality of light receivers, and determining the light reception status based on the irradiation intensity and the light reception position. This relates to a determination circuit.

(Prior Art) In conventional communications using spatial transmission of laser beams, the receiving side could only determine the temporal presence or absence of a received signal, and since the laser beam was not encoded, it was susceptible to airborne noise and was prone to malfunctions.

Moreover, since the determination is made for each light receiver, it is not possible to subdivide the irradiation energy intensity of the laser beam and determine the distinction between optical signals based on the intensity.

In addition, since conventional methods only receive analog laser light, it was not possible to classify the type of firearm or bullet type, for example, when making it compatible with firing a firearm. Therefore, it was impossible to contribute to the improvement of subsequent shooting effectiveness.

(Objective of the Invention) The object of the present invention is to improve the conventional light reception method in which communication content is judged only by the temporal presence or absence of laser light in communication using spatial transmission of laser beams, and to encode a large amount of information. It is an object of the present invention to provide a laser beam target training effectiveness determination circuit that can instantly detect and determine a large amount of information by receiving digitally modulated light.

(Structure and operation of the invention) The circuit for determining the effectiveness of target practice using a laser beam according to the present invention uses a laser beam transmitted by digital codes coded in correspondence with the characteristics of the firearm, effective range, hit range, etc., instead of using live bullets. Multiple light receivers with high sensitivity characteristics that can receive laser light from all directions are installed on the target side that is fired and hit (irradiated), and after passing through an optical filter for noise removal, it is sent to a photodiode. After optical to electrical conversion, the output is amplified by an amplifier, and this output is connected to differential amplifiers A and B, which are preset to "high level and low level", and depending on the intensity of the energy of the irradiated laser light, A
, B, or both, and by combining a plurality of these receivers, it is possible to classify the degree of hit on the target side into multiple types, and the code after determining the received code. It is characterized by being able to simulate damage dust in combination with the content (such as the type of bullet that was hit), making it possible to conduct more advanced training.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a layout diagram showing the overall system to which the present invention is applied, which is a firearm simulation training evaluation system using a laser beam. In this figure, A2. Az...AI,
are each mobile station in the same group, B+, Bz...B are each mobile station in another group that is opposed to this, each mobile station consists of a person, a vehicle, etc., and each mobile station is large, small, and medium, corresponding to a gun. By using a laser beam instead of live bullets in a group battle to simulate the firing of each firearm and the damage caused by the firepower, it was possible to grasp the progress of firearms training and contribute to the improvement of future training. It is also. In the figure, the arrows from each mobile station indicate two attack launches and light reception states with opposing groups.

-i Laser light has a shorter wavelength than visible light and infrared light, and is coherent (
It has coherent properties. In other words, laser light is a parallel beam with a uniform phase, and simply put, the wavefront of the light wave is a plane perpendicular to the direction of propagation, making it extremely monochromatic light (temporally coherent). This is similar to the properties of radio waves, but since it is in the optical domain, the wavelength is short, and as mentioned above, it is coherent and parallel light rays with little spread, so it is used in the field of optical communication.

Types of lasers include solid state lasers, gas lasers, semiconductor lasers, etc. Among these, semiconductor lasers are used in the field of optical communications because they are highly efficient, compact, lightweight, and economical. In particular, in the present invention, a GaAs semiconductor laser is used, and 7. When a large current flows in the forward direction of the P-N junction, a coherent laser beam is generated, and its oscillation wavelength is 0.8 to 0.9 μ (1 μ = l XIO-6
m) obtains frequencies around

The output energy distribution of the laser beam is as shown in FIGS. 3 and 4 for the PN junction. Conversely, laser beams can convert optical energy into electrical energy using a semiconductor light-receiving element (photodiode) that converts light to electricity.

FIG. 5 is a simple explanatory diagram of the conversion circuit, in which a photodiode (PD) is irradiated with a laser beam to obtain a voltage 2 across the resistor R2. In the present invention, an optical filter using a band-pass filter configured by combining a low-pass filter and a bypass filter allows only laser light to pass through and converts it into electrical energy.

In the present invention, these semiconductor lasers and light-receiving elements are used to emit laser beams that correspond to the characteristics of each firearm, effective firing range, range of impact on the opponent, etc., instead of the live bullets of firearms such as guns, cannons, etc. The target side (mobile station) determines the type of firearm on the attacking side, its individual number (from which mobile station it was fired), 2 the type of bullet, etc., and makes it possible to evaluate the success rate of the attack and the degree of damage caused by the firearm. It is.

In space transmission using such a laser beam, the radiant energy is reduced to a safety tolerance (9Xl0-' J/c+fl) of 171 to ensure safety for human eyes.
It is necessary to set the value to about 0, and in order to satisfy this value, a pulse modulation method with a laser beam transmission speed of about 1000 to 1200 bps is adopted.

FIG. 2 is a circuit block diagram of a laser unit, which is a main part to which the present invention is applied, which is implemented in each mobile station. 2-11.
...2-1m is a light receiver (DET) with a built-in light receiving element.
I, . . . DETm), and electrically consists of a laser beam receiving section, a circuit for converting the laser beam into an electric signal, an amplifier circuit, and the like.

Specifically, DETI...DETm all have the same circuit configuration, and a block diagram thereof is shown in FIG. In the figure,
When the light receiving element (PD) of the silicon photodiode is irradiated with laser light, a current i flows as shown by the arrow, and an electromotive force ■ is generated at both ends of the resistor R. is generated and amplified with AMPI.

This is the operation of optical to electrical conversion and amplification. AMP2.
AMP3 is a differential amplifier, and variable resistors VR, , VRz
Different input voltages are set, and the output is 0 UTI depending on the level of light receiving power.

Between either or both terminals of 0UT2 and the 0■ terminal (i.e. O[lT1-0 V, or 0UT2-
OV) produces a DC voltage. R2 and R are feedback resistors that determine differential amplification characteristics.

In other words, a laser beam emitted from the transmitting side (attacking side) is detected by a receiver with two levels of light receiving sensitivity.
Convert electricity.

Specifically, as shown in Table 1, the outputs are 0UTI and 0UT.
2 changes to "0pa" or "1°" in binary digital code depending on the light receiving sensitivity of the light receiver.

Table 1 Based on the outputs 0UTI and 0UT2, it is possible to determine the range of the hit, such as whether or not the bullet hit the target or whether it was a close shot.

FIG. 7 shows the main parts of the present invention inside two light receivers 7-1 and 7-2 among the light receivers 2-11 to 21m shown in FIG. 2 and the laser signal processor 2-25. A block diagram of the parts is shown. The damage situation is classified into four types: major damage, medium damage, minor damage, and invalid damage depending on the output of the laser beam irradiated (attacked) from the other party and received by the receiver 7-1, 7-2, as shown in Figure 2. The received light data is stored in the storage unit of the laser signal processor 2-25, and later this data is collected and evaluated.

In Figure 7, DETI (7-1), DET2 (7
-2) is the aforementioned photodetector, and as shown in the electrical circuit diagram in Figure 6, outputs 0UTI, 01lT2 (or output 0UTI) are controlled by variable resistors VR+ and VRz.
I, 0UT12) can be defined. In this case, the output 0UTI (or 01l
T11) is assumed to change from 0 to 1 when the received light intensity is greater than the output 0UT2 (or 0UT12). In other words, the output 0UTI (OUTII) is higher than the other output 0U.
VR and VR2 are set so that the light receiving sensitivity is lower than T2 (or 0UT12).

Normally, on the receiving side, two light receivers are used to determine if the target is close to being hit or not. 7-3 in Fig. 7 is the determination circuit, in which the trigger pulse input by laser beam irradiation is converted into an electric signal by two light receivers, each output is input from four lines, and is temporarily latched in the internal memory ( memory) and make a judgment.

Normally, if the intensity of the laser beam is strong and within the range of hitting,
Outputs 0UTI, 0UT2.0UTII, and 0UT12 all become O→1 trigger pulses, and conversely, if they are at close range, one of the outputs 0UT2.0UT12 becomes an O→1 trigger pulse and the determination circuit 73 latched into memory.

The midpoint between hit and close range is half hit, and the judgment circuit 7-3 outputs 0UTI, 0UT2.0UTII, 0[lT
The determination result shown in Table 2 is obtained by the pulse of 12 digital codes.

7-4 is a random number circuit for determining the defeat rate, and the damage situation of the own station is determined by multiplying (or adding) the determination result of the aforementioned determination circuit 7-3 and the defeat rate taken out from this random number circuit 74. .

Table note) 0UTI and 0UTII are each /? 0UT2.0U
Since the anger level is set to be duller than T12, when the former is 1, the latter will always be 1 as well.

This random number circuit 7-4 is constituted by a kind of shift register, and automatically selects the shift register of the kill rate to be multiplied by the bullet type code of the firearm on the transmitting side, which will be described later, and calculates the degree of damage. That is, on the receiving side, the weighting of damage is changed depending on the type of bullet included in the received code.

Specifically, the defeat rate and hit rate in the random number circuit 7-4.

Binary calculations for half-hit and close range are performed as follows. FIG. 8 is an explanatory diagram of the operation of the shift register in the random number circuit 7-4. That is, (1), (2), and (3) in Figure 8.

(4) is a shift register that constantly rotates in the direction of the arrow as time passes, and each has a code series composed of binary codes. For example, when the code sequence of the random number generator for 0UTI is (that is, this is the defeat rate), the degree of damage when one of the vital codes in Table 2 is input is calculated by multiplying each output separately. It is an n-bit code sequence, and is a shift register of a random number machine that is adopted when a half hit is determined in Fig. 7. When a half hit signal is input to the random number machine, the binary value is extracted from a of each shift register. Sign and 0UTI, 0UT2
．． Multiplying each of 0UTII and 0UT12 results in a major damage.
Judging whether it is moderately damaged, slightly damaged, or invalid. 0UTI~0UT12
The shift register series of 10100 is as shown below.
←This is the degree of damage.

If the damage is the greatest The output of each shift register a has the sign ■ of the above ■ So, if the easiest case is becomes.

Therefore, it is classified into 31 types of damage levels from 0000 to 11110.

After being attacked again and irradiated with a laser beam, the signal passes through the random number circuit 7-4, and the damage status code becomes 031.
00 (medium damaged), the cumulative addition circuit 7-5 shown in FIG. 7 cumulatively adds the damage status code stored in the previous memory, and determines the damage status as a new damage status. In other words, the degree of damage is differentiated as in the example above.

In this case, a mobile station that has already been determined to be severely damaged based on the output of the random number circuit 7-4 shown in FIG. 7 is determined to be incapable of firing a firearm, and its device functions are completely stopped. In addition, the random number circuit 7-4 initially determines that the degree of damage is medium damage, and the code indicating the degree of damage is 11000 (medium damage) and is stored in the degree memory as 100100... Result (major damage).
The result is a major disaster. In other words, the functions of the local station are completely stopped.

In this way, the degree of hit is determined using at least a plurality of light receivers, and the random number circuit 7
-4 shift registers with different weights, multiplied by this to determine the degree of damage, and then cumulatively add the degree of damage for each laser beam irradiation indicating hit, resulting in major damage, medium damage, and small damage. By classifying the degree of damage to one's own station, such as ``ineffective'' or ``ineffective,'' it is possible to make it correspond to live-fire training and contribute to improved evaluation.

The structure of the light receiver used in the present invention is as shown in FIGS. 9 and 10, with an electromagnetic shielding case 9-1.1-
In order to increase the effective incident area of the light receiving surface 9-2.9-5°10-2 of 4.10-1 and increase the light reception detection sensitivity,
Transparent plate 10-6 made of epoxy resin or acrylic resin
In this structure, vertical and horizontal grid-shaped shield conductors 10-7 are formed by etching from a printing plate on which a conductive material such as copper foil is printed.

In addition, in Figures 9 and 10, 9-3.9-6°1
0-3 is an output lead line of a high-sensitivity amplifier 10-5 that amplifies a weak signal from a light-receiving element 1O-4 that constitutes an internal circuit. The sensitivity of this light receiver is approximately proportional to the amount of received incident light if the light receiving area is constant. However, when the laser beam is directly received by the light receiving element 10-4, the S/N (signal-to-noise ratio) decreases due to disturbances such as external noise and radio waves. In particular, it prevents the influence of microwave radar, which can cause interference.

Returning to FIG. 2 again, the electrical signals from the photodetectors DETI to DETm are processed by the laser signal processor 2-25,
The data is stored in a storage unit in this unit in a format to be described later, and is also displayed on the controller 2-26.

The projector 2-22 receives a digital signal (1200 bps pulse modulation waveform) from the laser signal processor 2-25, converts it from electricity to light using a semiconductor laser as described above, and sends out a laser. The peak power of the semiconductor laser is selected, for example, 10 W, 5 W, or IW, depending on the desired transmission distance of the light, that is, the effective range of the firearm. With 7~8W, the effective firing range is as shown in Figure 13, and with =3000~4000 m, a range of 3m x 4m can be secured.

FIG. 11 shows a specific circuit configuration, input waveform (a), and output waveform (b) of the projector 2-22. When a control signal for firing a laser signal is input to the laser signal processor 2-25 by a trigger signal from the controller 2-26 in FIG. A 1200 bps digital signal is outputted from line (2) and manually inputted to the projector 2-22. This is the binary digital signal of waveform (a). In order to be able to trigger the gate G of a thyristor (SCR), which will be described later, with this binary digital code, it is passed through a waveform shaping circuit to C3, R+, Q+, CR.
+, CRz.

A trigger pulse for controlling conduction of the semiconductor laser CR is applied to the gate G1 of the SCR by a pulse application circuit consisting of T.

In the SCR, conduction occurs between the anode and the cathode only when a positive pulse is applied between the cathode and the gate G1. CR, , CR2 are diodes for preventing transient waveforms, and C4°R5 is a circuit for speeding up the rise of the clock. On the other hand, C2 always has Rz
, R5-93 is in a charged state with a positive voltage with respect to ground, and when SCR becomes conductive due to the above-mentioned drive pulse, the electromotive force charged in C2 causes CR4, SC
A large current (40
A) flows, and this semiconductor laser CR emits (sends) a laser beam. The peak power emitted from the semiconductor laser CR3 is determined by the applied voltage (2). (b
) is a pulse modulation waveform converted from electricity to light by the semiconductor laser CR, resulting in a laser beam with a transmission speed of 1200 bps (peak power is 1 to 10 W).

L, is PFN (Puρse Forming Net
Ll is an inductance coil called work).
Pulse waveform (b) by C2+ C3+ C4+C6
The pulse width Tw (120 ns) is determined.

C:+, Ca, and Cs are capacitors for finely adjusting the pulse width. In this case, the pulse width Tw of the expanded pulse waveform shown in FIG. 12 is expressed by the following equation.

T-kesa = 2NF “σ However, L=L.

C-C2+Cyu+C4+C.

In the embodiment of the present invention, C=10000pF, L=1
0nThe old N adopted N=6 as the number of PFN coil stages, so Tiv =2N1r1-=2xs, J side n) X 1
0000 (+))=120 nsec. In this way, the pulse width Tw is approximately 120 mm by the digital signal (a) from the laser signal processor 2-25.
ns, a pulse-modulated laser beam (b) with a peak current of 40 A can be emitted in correspondence with a live firearm bullet.

The effective firing range and hit range (vertical x horizontal) from the projector 2-22 on the transmitting side (attacking side) to the target (receiver on the receiving side) at a long distance are based on the peak power of the laser beam mentioned above and the 13th As shown in the figure, it is determined by a convex lens X for converging light.

That is, by utilizing the coherent property of laser light, a semiconductor laser serving as a light source emits light at approximately the focal position 1iF of the convex lens X.

In this way, it is possible to secure a hit range of 3 x 4 m at the maximum effective range L0 = 4000 m.

FIG. 2 will be explained again. 2-23°2 in the figure
-24 is the firing/destruction indicator (1), (n), and in order to correspond with the actual firearm, the indicator (+) is equipped in advance when connected to the trigger of the firearm and fires a laser beam during an attack. An electric current was passed through the stored cartridge, causing it to explode and emit smoke.
Conversely, when attacked and hit, the cartridge explodes in the same way, making it appear as if the weapon had been hit by a bullet. display(
II) performs the same function using, for example, light from a xenon lamp and electric sound instead of using a cartridge. The laser signal processor 2-25 includes the aforementioned detectors 2-11 to 2-1.
m, projector 2-22 launch explosion indicator (1) (■
) is a device with a built-in computer for controlling the entire system including the controller 2-26, and performs binary digital signal processing for transmitting/receiving laser light, bit synchronization, frame synchronization processing, etc.

Next, the binary digital code (
The processing on the receiving side at a transmission rate of 1200 bps will be explained.

FIG. 14 is a time chart showing the digital code of the laser beam emitted by one trigger, where ST is a start signal, CI, C2, and C3 are different types of information, and E is an end signal. In the case of this system, in order to follow the short bursts of live ammunition, unlike normal data transmission, it is necessary to set bit synchronization and frame synchronization on the receiving side in a short time to ensure error-free data. For some firearms that fire one bullet with one trigger, the data is output in 1 section, and for firearms that fire continuously with one trigger, the data is output in 14th section.
Data for one section in the diagram (SYNC + identification code x 3)
is instantaneously and continuously output repeatedly at regular intervals.

The same data per frame is sent three times following a bit synchronization code (SYNC), and on the receiving side, after bit synchronization and frame synchronization (start detection), a three-value majority decision is made. The data contents of the identification codes ci, C2, and C3 are set as follows. C1 consists of 2 bits and indicates the number of the own group to which each mobile station belongs (for example, four types of groups such as A group, B group, etc.). C2 consists of 10 bits, 4 bits for the type of firearm used by your station → 0000.0001. ...,
1111, 16 types, 6 bits for own station's individual number → 26
=64 types.

C3 is the type of bullet used (2 bits → 22
= 4 types). Based on this, data is analyzed and evaluations are made during and after training.

A laser beam is emitted with the above code arrangement, and on the receiving side, in addition to the above-mentioned emission code, a built-in timer (clock) that is set at the same time is used to additionally calculate the hit (light reception) date, 1 time, and defeat rate. The obtained damage situation and the like are temporarily stored in a storage unit inside the laser signal processor 2-25, and later evaluated for each mobile station.

FIG. 15 is a time chart of transmission and reception signals of pulse modulated waves by laser beams, and FIG. 16 is a block diagram of the main circuits of the laser signal processor 2-25 shown in FIG. Perform frame synchronization (start detection) settings and data detection. In Fig. 15, when the trigger connected to the firearm on the transmitting side is turned on, a laser emission signal is emitted from the projector with a pulse width Δtz=120 ns and a frequency of 120 ns.
It is output as a 1200bps signal of J4833IIS. Prior to the identification code, a preamble signal of 8 bits with a pulse width of 120 ns is transmitted. High-speed bit synchronization is established using these 8-bit "1" binary codes, and the method will be explained next.

In FIG. 16, 16-1 is an original clock oscillator for time base, 16-2 and 16-3 are frequency dividers for dividing the frequency of this original clock to create a timing clock. Decoder 16-4 is connected to the output of -3 to obtain decoder outputs 1 to 8. This is the timing clock for decoder outputs 1 to 8 on the receiving side in FIG. 15, and the pulse width Td for one bit is as follows.

Bit synchronization setting determines which slot of the timing clock of decoder outputs 1 to 8 matches the received incoming signal. The received signal obtained from the data detecting section 16-5 of the aforementioned detector circuit is converted from optical to electrical signal 2.
It is a decimal digital code. Frequency divider 16-2.16-3
and a shift clock generated by the decoder 16-4,
Eight AND circuits 16-6 perform AND with the incoming received data.
~16-13 respectively, 8 shift registers 1
This AND data is simultaneously input in parallel to each of 6-14 to 1621 at a clock speed 8 times the data arrival speed (or 178 periods of the incoming data period).

Next, each output of these eight shift registers 1 to 8 is A.
AND with ND circuits 16-22 to 16-29 and 8 bits.
At the point in time when the signal of all "1" degrees arrives (point A of the bit synchronization slint determination in Figure 15), it is determined to which shift register output all the signals of "'1" have been input.The example in Figure 15 If it is determined that it is the slot of decoder output 3 at point A as shown in FIG. This is the data sampling clock.

In the present invention, in order to judge received data without error, a start signal (ST
) is confirmed by the ST detection circuit 16-31,
Only when there is a match, three 16-bit shift registers 16-
At 32.16-33.16-34, the incoming data is shifted one bit at a time from the start signal using the data sampling clock (set pulse 1) described above. 16X 3
= When data for 48 bits is manually input to the three shift registers 16-32 to 34, set pulse 1 in FIG. 15 (after Δt4 sec after the third E code arrives)
The first identification code.

Second and third opposing C1. Memory of digital codes of C2 and C3 (ΣC1) 16-35. (ΣC2
) 16-36. (ΣC3) A temporary input is made to 16-37, and a majority decision is made here. At the time point B in the time chart of FIG. 15, data for one frame is stored in the memory 1
6-35 to 6-37 are temporarily input. As mentioned above, C1, C2, and C3 are different identification information.

In the memories ΣC1, ΣC2, and ΣC3, the majority decision shown in FIG. At the timing in FIG. 15, Δt from time B
It is input to the memory 1638 at set pulse 2 with a delay of 5 minutes.

As mentioned above, here 01 indicates the group number, C2 indicates the firearm type individual number, and C3 indicates the bullet type, so the previous date and damage situation of the own station are added to these and stored in the storage unit.

As described above, the conventional method of creating multiple timing slots from the frequency division timing circuit and decoder circuit by the frequency divider on the receiving side and determining which timing slot the incoming received signal matches is different from the conventional method. Like the bit synchronization setting method, the incoming signal is differentiated to create a conversion point of O → 1.1 → 0, and the phase of the timing clock on the receiving side is advanced or delayed for each incoming bit signal to adjust the phase of the incoming signal. Compared to the method of matching the data, bit synchronization can be determined instantaneously using a smaller number of bits, and the received data is determined by majority decision for subsequent received data, so correct data can be output even if there is a data error in the middle. be able to.

A mode in which each mobile station is actually equipped with a device equipped with the present invention is shown in FIG. 17 and FIG. 18. FIG. 17 shows how the device is installed on a person, and FIG. 18 shows how it is installed on a vehicle. That is, in FIG. 17,
17-1 is the same as the light receivers 2-11 to 2-1m shown in Figure 2, and has multiple detectors (light receivers) for detecting laser light so that it can detect laser light from all directions of 360 degrees. A total of about 10 to 15 detectors 17-1 are attached to the head and body using the connecting hand 17-2. 17-3. l'l-4 is a communication radio, a laser signal processor, and a memory unit, which performs digital processing after detecting pulse-modulated laser light with a detector as described above, and stores the data for post-processing. . 1
7-5 is a firing/killing indicator (II) corresponding to 2-24 in FIG. 2, which emits light and sound when the laser processor 17-4 determines that the bullet has been hit. 17-6 is an antenna for a radio device. 17-7 is a rifle used by humans, and a projector 17-8 corresponding to 2-22 in FIG. 2 is attached to this.

Normally, before training, it is necessary to perform so-called standard calibration in advance by adjusting the physical position of the lens system shown in Figure 13 so that the trajectory emitted from the rifle and the laser beam emitted from the projector 17-8 almost match. .

In FIG. 18, 18-1 is a vehicle detector (light receiving H), and 10 to 15 detectors are attached to one vehicle in order to ensure 360° directionality in the same way as for personnel.

18-2 is the connection band of the detector 18-1, 18-3
18-4 is a communication radio, and 18-4 is a laser signal processor and a memory unit included therein. 18-5 launches,
Unlike the destruction indicators (1) and (II), for large vehicles, etc., in addition to lights and sounds (electrical pseudo-sounds), cartridges are used in order to correspond to the firing and destruction effects of actual firearms, unlike for personnel. Express the effect. 18-6 is a wireless antenna, 18-7 is a firearm for vehicles, and 18-8 is a projector that has been calibrated to the standard.In particular, those for large vehicles have a longer effective range than those for personnel, so they are installed inside the projector. The peak power of the semiconductor laser is large (approximately 10 dB higher). 18-9
is the system controller that can be operated from the vehicle cockpit.

(Effects of the Invention) As explained in detail above, by implementing the present invention, target training equivalent to actual combat using live bullets using various types of firearms, which could not be carried out conventionally due to the danger to human life, can be carried out. This has extremely large effects, such as the ability to conduct more advanced training because the effectiveness of fire and the degree of damage can be immediately evaluated.

[Brief explanation of drawings]

Figure 1 is an overall operational system diagram, Figure 2 is a block diagram of the laser section of the mobile station, Figures 3 and 4 are laser light output energy distribution diagrams at the PN junction, and Figure 5 is an optical to electrical conversion circuit diagram. ,
FIG. 6 is an electrical circuit diagram of a photoreceiver that is part of the present invention; FIG.
The figure is a partial circuit block diagram of the light receiver and laser signal processor, which are the main parts of the present invention, Figure 8 is an explanatory diagram of the random number generator, Figure 9 is a perspective view of the light receiver, and Figure 10 is the light reception of the light receiver. A top view and a vertical sectional view, Figure 11 is an electric circuit diagram and waveform diagram of the projector,
Fig. 12 is an enlarged view of the pulse waveform of the laser beam, Fig. 13 is an explanatory diagram of the projector's communication distance, Fig. 14 is a time chart of the digital signal of the laser beam, Fig. 15 is a time chart of the transmitted and received signals, FIG. 16 is a block diagram of the receiver circuit of the laser signal processor, FIG. 17 is a device diagram of the personnel light receiver, and FIG. 18 is an installation diagram of the vehicle light receiver. A+ ~An, BI""B-"'Mobile station, 2-11
~2-1m... Light receiver, 2-22... Projector, 2-23. 2-24...Display device, 2-25.
...Laser signal processor, 2-26...Controller, 7
-1.7-2... Light receiver, 7-3... Judgment circuit,
7-4... Random number circuit, 7-5... Cumulative addition circuit, 9-19-4.1 (1-1... Electromagnetic shielding case, 92.9-5.10-2... Light reception face, 9-
3.96.10-3...Leader line, 1O-4...Light receiving element, 10-5...Amplifier, 10-6...Transparent resin plate section, lo-7...Lattice shield conductor, 16
-1... Oscillator, 16-2.16-3... Frequency divider, 16-4... Decoder, 16-5... Data detection unit, 16-6 to 16-13.16-22 ~16-
29...AND circuit, 1614-1121...shift register, 16-30...bit synchronization slit judgment/time base generation circuit, 16-31...ST detection circuit, 16-32-16-34. ...16-bit shift register, 16-35 to 16-37...memory, 16-38...16-bit memory, 17-1°18-1...light receiver, 17-2.18-2...・Connection band, 17-3.18-3...Communication radio,
174.18-4...Laser signal processor, 17-
5.18-5...Display device, 17-6, l8-6...
・Antenna, 17-7.18-7...Firearm, 17-
8.18-8...Projector. Figure 1

Claims (1)

[Scope of Claims] A large number of light receivers are arranged and attached to an irradiated object that receives a spatially transmitted laser beam emitted with digital coded information pulse-modulated, so as to be able to receive the laser beam from all directions. It is connected to a light-receiving element that is built into each of the plurality of light receivers and converts light to electricity, and the output of the light-receiving element is compared with two preset levels, high and low, and one of the two outputs is determined. a differential amplifier for inputting one or both of the outputs to obtain a binary digital output; and a differential amplifier for inputting one or both of the outputs to obtain a binary digital output; and a binary digital output of each of the two photodetectors that received the laser beam among the plurality of photodetectors to output the output from the binary digital output to the irradiated object. a determination circuit that determines whether the degree of hit is a hit, a half-hit, or a close hit, and outputs the digitally coded information; Destruction, which shows the defeat rate.
a random number circuit that selects one of medium damage, small damage, and invalid and determines the damage level by multiplying or adding the selected defeat rate and the hit rate; and cumulating the output of the random number circuit. A circuit for determining the effectiveness of target practice using a laser beam, comprising: a cumulative addition circuit that determines and outputs a final degree of damage.