CN113465453A - Frameless photoelectric target and live ammunition target reporting method thereof - Google Patents

Abstract

The invention provides a frameless photoelectric target, wherein an armor plate, a master control box, an angle measuring sensor and an illumination light source are arranged on a bottom plate, target surfaces of the armor plate and target paper are respectively positioned at the front side and the rear side of the bottom plate, the master control box, the angle measuring sensor and the illumination light source are positioned between the armor plate and the target surfaces, and the upper edge of the armor plate is higher than a working part on the bottom plate, so that a protection effect is achieved; the number of the angle measuring sensors is four, the number of the lighting sources is two, the two angle measuring sensors and the lighting source form a group of detection units to form a detection surface, the two groups of detection units form a detection surface and a rear detection surface respectively, and the two detection surfaces are parallel to the target surface of the target paper. The invention further provides a live ammunition target reporting method based on the frameless photoelectric target. The invention effectively solves the problem of errors caused by the oblique penetration of bullets into the target surface, improves the target reporting precision of the whole equipment device, simplifies the whole structure, improves the working safety and reliability of the whole machine and reduces the maintenance workload of the equipment in use.

Description

Frameless photoelectric target and live ammunition target reporting method thereof

Technical Field

The invention relates to weapon shooting training target reporting equipment, in particular to a frameless photoelectric target of a space arrangement sensor and a live ammunition target reporting method thereof.

Background

The position at which the bullet strikes the backing paper at the time of live fire of a small arms determines the ultimate shooting result of the shooter. The original method is to manually check the position of the bullet hole on the target paper and calculate the shooting score. With the development of the technology, various automatic target reporting devices are produced due to transportation, and people can automatically output the positions of bullets on the target paper without manually checking the bullet holes on the target paper. To date, target-scoring products have been invented by various methods such as electric conduction, shock (ultrasonic) sensing, optical (laser) sensing, and the like. Each of these products has advantages and disadvantages, but in general has disadvantages such as poor precision or poor ballistic performance.

The earliest live ammunition target reporting method is made into a partition conductive detection mode, the target has front and back surfaces which are conductive aluminum films or conductive rubber sheets, when the bullet passes through the target surface, the two surfaces are connected to generate a short-circuit pulse, and the number and the direction of rings hit on the target by the bullet are output through signal processing by connecting different ring areas and directions. The method has low precision, and the conducting layer is easy to be knocked off at the bullet dense part, so that the continuous work can not be carried out.

The current most common is the shock wave (ultrasonic) target reporting form. The method is characterized in that a plurality of shock wave probes are arranged below a target surface, shock waves are generated when bullets fly, the probes can detect the shock waves generated by the bullets, and the position coordinates of the bullets on the target surface can be obtained by calculating and processing the time difference of the shock waves reaching each probe, so that target reporting output is performed. The method has simple structure, but has low precision and can not report the target of the low-speed bullet.

In recent years, some related products appear in the aspect of optical target scoring, and the specific method is to arrange a crossed light curtain in front of a target surface area, shield the light curtain when a bullet passes through the target surface, detect the shielded position, and obtain the corresponding position coordinate of the bullet in the light curtain through corresponding calculation processing, so as to give the bullet hole position on the target surface and realize target scoring. The existing optical target-reporting model has a structure introduced in algorithm design and application based on a photosensitive tube array laser target (3 months in 2020), is in a horizontal and vertical orthogonal layout, and calculates corresponding bullet position coordinates by detecting the position of a bullet generating shadow. Another common optical target-reporting model is, for example, patent CN111811326A laser target, laser L-shaped light curtain intelligent target-reporting system and its target-reporting method, which designs two sets of laser emitting and receiving devices, one laser point and diagonal L-shaped form an angle measuring device, and detects an orientation of the shadow generated by the shielding light curtain of the bullet. And the other group of devices detects the other direction, combines the two direction data in one plane, and calculates the coordinate position of the bullet on the target surface when the bullet is normally incident according to the physical size of the whole device. In all optical target scoring methods, the light source and the detection element are respectively arranged on the periphery of the target surface and cannot be placed on one side, a complete frame body needs to be formed, the part exposed in the air is easy to hit by bullets, and the whole frame body needs to be subjected to bulletproof treatment, so that the whole device is heavy, high in manufacturing cost and inconvenient to install and use.

In the current shock wave or optical target reporting equipment, a detection plane where a sensor is located has a certain distance with a target paper plane and cannot be superposed, and when the bullet shooting device works, a bullet is supposed to be perpendicular to the target surface and to be normally incident on the detection surface, and the bullet shooting result is converted by orthographically projecting the bullet to the target paper according to the coordinates of the detection surface. Therefore, when the bullet is not shot obliquely to the target surface, the coordinate obtained by the detection surface and the target surface coordinate have deviation, the deviation sometimes reaches several millimeters, and the error can cause the bullet hole close to the edge of the circular line to generate the error of the ring number score, which is very important and has the problem that the problem cannot be solved. As shown in fig. 2, the sensor detects that the distance from the surface T1 to the target paper surface T is d, and the bullet is generally considered to be vertically shot into the target surface, so the position coordinates of the PS point of the bullet in the surface T1 can be regarded as the position of the bullet hole on the target surface. However, when the angle between the bullet and the perpendicular line of the target surface is a, the coordinate error of the generated bullet hole is e: e ═ d tan (a). A common dimension d is about 40 mm. Assuming that the bullet deviation angle a is 5 ° with d being 40mm, the error e is: e ═ d ═ tan (a) ═ 40 ═ tan (5 °) 3.5 mm. Such a deviation is relatively large, and when a certain accuracy is required, the shooting result of the shooter is erroneous, and for example, the 8-ring bullet hole is a result of 7 rings, and thus the use requirement cannot be satisfied. Even if the shooter shoots correctly, the declination error problem described above also arises because the target device is not positioned exactly opposite the shooter because of the inaccurate direction of placement of the target device.

Disclosure of Invention

The invention aims to provide a frameless photoelectric target of a space arrangement sensor and a live ammunition target reporting method thereof.

The technical solution for realizing the purpose of the invention is as follows: the utility model provides a frameless type photoelectricity target, includes bulletproof plate, total accuse box, bottom plate, angle measurement sensor, illumination source, target board and target paper, wherein:

the bottom plate is positioned below the integral device, the bulletproof plate, the master control box, the angle measuring sensor and the illumination light source are arranged on the bottom plate, the target surfaces of the bulletproof plate and the target paper are respectively positioned on two sides of the bottom plate, the master control box, the angle measuring sensor and the illumination light source are positioned between the bulletproof plate and the target surfaces, and the upper edge of the bulletproof plate is higher than the working part on the bottom plate to play a role in protection;

the number of the angle measuring sensors is four, the number of the lighting sources is two, the two angle measuring sensors and the lighting source form a group of detection units to form a detection surface, the two groups of detection units respectively form a detection surface and a rear detection surface, and the two detection surfaces are parallel to the target surface of the target paper; when the bullets sequentially pass through the detection surfaces by taking a space straight line as a track, the bullets are illuminated by the corresponding light sources, the deflection angles of the bullets relative to the respective optical axes are detected by the two angle measuring sensors, the deflection angles are sent to the master control box to calculate the intersection point positions of the bullets passing through the detection surfaces, and then the coordinates of the bullet holes in the target surface are calculated by combining the space position relation.

Further, the master control circuit board and the signal interface circuit board are contained in the master control box, wherein the master control circuit board is connected with the lighting source through a cable, the driving light source emits light, the master control circuit board is connected with the angle measuring sensor through a cable, angle measuring signal data obtained by the angle measuring sensor are collected, the master control circuit board processes and calculates the collected angle measuring signals to obtain position coordinate data of the bullet holes in the target surface after bullet shooting, the position coordinate data are transmitted to the upper computer through the signal cable and the interface circuit board, and target reporting display and shooting score recording are carried out on the upper computer.

Furthermore, the angle measuring sensor comprises a sensor lens, a sensor shell, an internal fixing screw, a space ring, a sensor chip, a chip bottom plate and a sensor fixing screw, wherein the sensor lens is glued above the sensor shell, and the chip bottom plate is fixed in a cavity of the sensor shell through the space ring and the internal fixing screw; a sensor chip is connected to the chip bottom plate in a carrying manner, a lead is welded below the chip bottom plate and is connected with the master control box, and a signal acquired by the sensor is sent; the angle measuring sensor is arranged on the bottom plate through two sensor fixing screws at the bottom.

Furthermore, the sensor chip selects the type of the PSD, and position data of an imaging light spot on the chip is obtained through conversion processing of photoelectric signals.

Furthermore, the lighting source comprises light source window glass, a laser, a light source shell and a light source fixing screw, wherein the laser is installed in the light source shell through clamping or pressing connection, a welding pin penetrates through a corresponding small hole, a lead is welded in a cavity below the laser, and the lead is connected with the master control box through a wiring hole in the light source shell; window glass is fixed above the light source shell in a cementing mode; the lighting source is arranged on the bottom plate through two light source fixing screws at the bottom.

Furthermore, the laser is a semiconductor laser, the emitted light of which has a scattering property, and the scattered laser is irradiated upwards through the window glass at a certain angle.

Still further, the laser is replaced with a single LED or an array of LEDs.

A live ammunition target-reporting method is based on the frameless photoelectric target to achieve live ammunition target-reporting, when a bullet sequentially passes through two detection surfaces and a target surface by taking a space straight line as a track, intersection point coordinates of the bullet and the two detection surfaces are determined by using an angle measurement sensor and an illumination light source, and then coordinates of an ammunition hole on the target surface are calculated through a space position relation.

Compared with the prior art, the invention has the following remarkable advantages: 1) by designing the photoelectric angle measuring sensor into a spatial three-dimensional layout structure and detecting the space track of bullet flight, the problem of errors caused when the bullet obliquely enters a target surface is effectively solved, and the target reporting precision of the whole equipment device is improved. 2) The illumination light source, the angle measurement sensor and other components are designed on one side below the target surface, a frame body containing working components is not required to be formed in the space around the target surface, the integral structure is simplified, the bulletproof requirement of aerial equipment is avoided, the working safety and reliability of the whole machine are greatly improved, and the maintenance workload of the equipment in use is reduced.

Drawings

Fig. 1 is an overall schematic view of the device.

FIG. 2 is a schematic diagram of errors formed by a single detection surface.

Fig. 3 shows the position relationship between the two detection surfaces, the shot hole and the shot on the two detection surfaces.

Fig. 4 is a spatial layout of two sets of sensors.

Fig. 5 shows a detection surface consisting of a set of sensors.

Fig. 6 is a schematic diagram of calculation of a positional relationship of the projectile in one detection plane.

Fig. 7 is a schematic diagram of the accurate calculation of the coordinates of the bullet holes in the height Y direction.

Fig. 8 is a schematic diagram of the accurate calculation of the coordinates of the bullet holes in the horizontal X direction.

Fig. 9 shows an irradiation light source configuration.

Fig. 10 shows an angle sensor configuration.

Fig. 11 is a system signal connection diagram.

FIG. 12 is a schematic view of the present apparatus.

Reference numbers of the drawings:

the device comprises an armor 1, a general control box 2, a bottom plate 3, an angle measuring sensor 4, a lighting source 5, a target plate 6, a target paper 7, a main control circuit board 2-1, a signal interface circuit board 2-2, a signal cable 2-3, a sensor lens 4-1, a sensor shell 4-2, an internal fixing screw 4-3, a space ring 4-4, a sensor chip 4-5, a chip bottom plate 4-6, a sensor fixing screw 4-7, a light source window glass 5-1, a laser 5-2, a light source shell 5-3 and a light source fixing screw 5-4. The figure identifies the character:

t-target paper target surface, T1-detection surface, T2-rear detection surface, P-target paper surface shot hole, position of bullet in PS-detection surface, angle between a-bullet and perpendicular of target surface, deviation generated by e-bullet oblique shooting, distance between D-detection surface and target paper surface, distance between D-detection surface and rear detection surface, H-target paper surface shot hole, H1-detection surface bullet position, H2-rear detection surface bullet position, L-detection surface left angle sensor datum point, M-left angle sensor optical axis, R-detection surface right angle sensor datum point, N-right angle sensor optical axis, angle between AL-bullet and left optical axis M, angle between AR-bullet and right optical axis N, projection point to coordinate cross axis in G-detection surface, x1 is the lateral coordinate of the bullet in the test surface, Y1-the height coordinate of the bullet in the test surface, F-the projection point of the H1 point on the T2 plane in the OZY1Y2 plane, E-the projection point of the H1 point on the T plane in the OZY1Y2 plane, J-the projection point of the H1 point on the T2 plane in the OZX1X2 plane, K-the projection point of the H1 point on the T plane in the OZX1X2 plane, W-the beam scatter angle of the illumination source, U-the bright spot formed by a certain bullet, U-the angle of the bright spot U of the bullet relative to the optical axis N, V-the bright spot formed by a certain bullet, V-the angle of the bright spot V of the bullet relative to the optical axis N.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1, the frameless photoelectric target includes an armor 1, a general control box 2, a bottom plate 3, an angle measuring sensor 4, an illumination light source 5, a target plate 6, target paper 7, and the like, wherein the sensors and the like are all located below the whole device, and the sensors and the like are spatially arranged, and the whole arrangement is a frameless structure, specifically as follows:

the master control box 2, the angle measuring sensor 4, the illumination light source 5 and the like are all installed on the bottom plate 3, the bulletproof plate 1 and the target surface are respectively located on the front side and the rear side of the bottom plate, and the bulletproof plate is located at the forefront and faces the position where a son is ejected.

The target board 6 is made of wood board or foam plastic board and the like, can bear multiple penetration shooting of bullets, and has the main functions of supporting and attaching target paper.

The bulletproof plate 1 is made of a firm armor steel plate or the like, and can block the shooting of bullets. The upper edge of the bulletproof plate 1 is higher than the working part on the bottom plate 3, when a bullet is shot from the left side and is shot to the target surface, if the bullet with a lower position is blocked by the bulletproof plate, the working part on the bottom plate 3 is prevented from being damaged.

In the structural layout shown in fig. 4, two angle measuring sensors and an illumination light source form a group of detection units to form a detection surface, so that the coordinate position of the bullet on the plane can be independently detected. The two groups of detection units respectively constitute a detection plane T1 and a rear detection plane T2. The two faces T1 and T2 are parallel to the target paper target face T. The distance between the two detection surfaces is D, and the distance between the detection surface T1 and the target surface T of the target paper is D.

As shown in FIG. 3, rectangular coordinate systems OXYZ, O1X1Y1Z1 and O2X2Y2Z2 are respectively established at the positions of the target surface T, the detection surface T1 and the rear detection surface T2, and the Z axes of the three coordinate systems are coincident, namely Z1, Z2 and Z are coaxial. The three facet spacings are D and D, respectively, as described above. The bullet sequentially passes through T2, T1 and T by taking a space straight line as a track, and three intersection points are respectively H2, H1 and H. When the coordinates of H2 and H1 are obtained by the two detection surfaces respectively, the accurate coordinates of the bullet hole H on the target surface T can be calculated through the spatial position relation of the device, no matter what direction the bullet is obliquely shot.

Within the detection plane T1, a planar coordinate system O1X1Y1 is established as shown in fig. 5. The line connecting the optical centers (reference points of the measured angles) of the left and right angle-measuring sensors 4 is defined as the X-axis, and is positive to the right. The intermediate point O1 between the two optical centers is the origin, and the direction parallel to the target surface T is the Y1 axis.

The light emitting device in the illumination light source 5 is a laser or an LED lamp, and emits light upward at a scattering angle W, only if the target region is within the scattering angle W.

When the bullet passes through the T1 face, it is illuminated by the light source. For both angle sensors, the bullet appears as a bright spot which is detected by the angle sensor, i.e. the deviation angles AL and AR of the bright spot with respect to the respective optical axes can be detected. Wherein AL is the relative left side angle measurement sensor optical axis M's of bullet bright spot contained angle, and AR is the relative right side angle measurement sensor optical axis N's of bullet bright spot contained angle.

In fig. 6, the reference points L and R of the two angle-measuring sensors are spaced apart by C, which is a constant value in the device. A coordinate system O1X1Y1 is established in the detection surface T1, wherein an X1 axis passes through points L and R, a coordinate origin O1 is a midpoint of a line segment LR, and a straight line passing through O1 and upwards is a Y1 axis.

The reference points of the two angle measuring sensors are respectively L and R, the respective optical axes are respectively M and N, and the angle measuring sensors have the function of detecting the included angle between the target bright point and the optical axes. The intersection point of the bullet passing through the T1 detection surface is H1, and the light spot generated by the bullet at the position of H1 is detected by two angle sensors, and the included angles are AL and AR respectively. The angles AL and AR are directional values, negative when the spot is to the left of the optical axis and positive otherwise. In fig. 6 AL is negative and AR is positive. The angle between the optical axis M, N and the X1 axis is A and is constant.

In the coordinate system O1X1Y1, the coordinates of the position of the bullet H1 are (X1, Y1), and the projection point of the point H1 on the horizontal axis O1X1 is G, so the coordinates of the point G are (X1, 0).

In triangle LGH 1:

H1G＝LG*tan(∠H1LG)

＝LG*tan(A-AL)

∴LG＝H1G/tan(A-AL)

likewise, in triangle RGH 1:

H1G＝RG*tan(∠H1RG)

＝RG*tan(A+AR)

∴RG＝H1G/tan(A+AR)

∵LG+RG＝LR＝C

i.e. H1G/tan (A-AL) + H1G/tan (A + AR) ═ C

The following can be obtained:

in summary, the coordinates (x1, y1) of the location of bullet H1 in the detection plane T1 are:

through the above calculation, the accurate coordinates of the bullet in the plane T1 are obtained.

Similarly, two angle sensor signals in a detection plane of the T2 are acquired, and the position coordinates (x2, y2) of the bullet light point H2 in the plane can be obtained through processing.

For two point positions on a known bullet trajectory line: h1(x1, y1) and H2(x2, y2), the accurate state of the straight line in space can be determined.

By relating the projection of the straight line of the trajectory in the height direction and the horizontal direction, the coordinates H (x, y) of the intersection of the straight line and the plane of the target surface can be calculated.

In fig. 7, the bullet trajectory is shown as a straight line when viewed from the side, reflecting the situation in the height direction. The intersection point of the bullet trajectory straight line and the target surface T is H, the intersection point of the bullet trajectory straight line and the target surface T passes through H1 to be used as an auxiliary line FE, the FE is parallel to the Z axis, and the intersection points on the plane T and the plane T2 are respectively E and F. The two triangles Δ H1FH2 and Δ H1EH are similar and are right triangles. From a similar relationship:

HE＝H2F*(d/D)

＝(y1–y2)*(d/D)

the height coordinate y in the target surface is:

y＝y1+HE

＝y1+(y1–y2)*(d/D)

this value is the y coordinate value in the height direction of the final shot hole position on the target surface T.

Similarly, in fig. 8, the x coordinate value in the horizontal direction of the final bullet hole position on the target surface T is obtained by solving:

x＝x1+(x1–x2)*(d/D)

from the above, it can be seen that the exact coordinates of the bullet finally on the target surface T are (x, y):

x＝x1+(x1–x2)*(d/D)

y＝y1+(y1–y2)*(d/D)

the accurate position of the bullet hole of the target surface corresponds to the shape and size of the target shape, such as the number of rings, the direction and the like, and the accurate live-action shooting target reporting can be completed.

In fig. 9, the internal structure of the illumination light source 5 is shown. The lighting light source part comprises light source window glass 5-1, a laser 5-2, a light source shell 5-3, a light source fixing screw 5-4 and the like, wherein the laser 5-2 is arranged in the light source shell 5-3 in a clamping or pressing connection mode and the like, a welding pin penetrates through a corresponding small hole, a lead is welded in a cavity below the welding pin, and the lead is connected with the master control box through a wiring hole in the shell. The window glass 5-1 is fixed on the upper part by a gluing way. The laser is a semiconductor laser, the emitted light has the characteristic of scattering, and the scattered laser is irradiated upwards through the window glass at a certain angle W. In the invention, the irradiation light source can adopt a semiconductor laser as a luminous light source, and can also adopt an LED as a light source, thereby realizing the same function. The power density of the LED is slightly lower than that of the laser, and a high-power tube is needed or a plurality of LEDs or light sources are needed to form an array so as to achieve the same illumination effect of the laser. The lighting source is mounted on the base plate 3 by two light source fixing screws 5-4 at the bottom.

In fig. 10, the internal structure of the angle sensor is shown. The angle measuring sensor 4 comprises a sensor lens 4-1, a sensor shell 4-2, an internal fixing screw 4-3, a space ring 4-4, a sensor chip 4-5, a chip bottom plate 4-6, a sensor fixing screw 4-7 and the like. A sensor lens 4-1 is cemented above the angle sensor. The chip base plate 4-6 is fixed in the cavity through a space ring 4-4 and an internal fixing screw 4-3, and a sensor chip 4-5 is carried and connected on the chip base plate 4-6. And a lead wire is welded below the chip bottom plates 4-6 and is connected with the master control box to send signals collected by the sensor. In front of the angle measuring sensor, when a bright point U appears, light of the bright point is imaged and converged on a sensor chip 4-5 through a sensor lens 4-1 to form an image point, the position data of the image point on the sensor chip 4-5 can be obtained through photoelectric conversion, and the corresponding included angle U of the light point relative to an optical axis N can be obtained through conversion processing. Similarly, when the light spot appears at the position V, the angle measuring sensor can detect a corresponding signal to obtain the size of the included angle V. The angle sensor 4 is mounted on the base plate 3 by two sensor fixing screws 4-7 at the bottom. The sensor chip is preferably of a PSD type, and position data of an imaging light spot on the chip can be obtained through conversion processing of photoelectric signals.

As shown in fig. 11, a master control box 2 is installed on a bottom plate 3, and the master control box 2 includes a master control circuit board 2-1 and a signal interface circuit board 2-2. The master control box 2 is connected with the angle measuring sensors 4 and the lighting source 5 on the two sides through cables. The main control circuit board 2-1 is connected with the lighting source 5 through a cable to drive the lighting source to emit light. The main control circuit board 2-1 is connected with the angle measuring sensor by a cable, and acquires angle measuring signal data obtained by the angle measuring sensor 4. The main control circuit board 2-1 processes and calculates the collected angle measurement signals to obtain the final position coordinate data of the bullet holes on the target surface after the bullet is shot. The data is transmitted through the interface circuit board 2-2 via the signal cable 2-3 and the upper computer (computer), and target-reporting display, shooting score recording and the like can be carried out on equipment such as the upper computer (computer) and the like.

In summary, according to the frameless photoelectric target device, the sensor adopts a spatial three-dimensional layout, and can detect and collect a spatial track of the bullet in front of the target surface, so that the coordinate position of the bullet hole of the bullet on the target paper surface is accurately calculated, and the error problem caused by the misalignment of the detection surface and the target surface of the sensor is eliminated. All working devices are arranged on one side of the lower portion, target reporting work can be achieved without forming a frame, bulletproof design is not needed around a target surface, and only one side of the lower portion needs to be bulletproof.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (8)

1. The utility model provides a frameless type photoelectricity target which characterized in that, including bulletproof plate (1), total accuse box (2), bottom plate (3), angle measurement sensor (4), light source (5), target board (6) and target paper (7), wherein:

the bottom plate (3) is positioned below the integral device, the bulletproof plate (1), the master control box (2), the angle measuring sensor (3) and the illumination light source (5) are arranged on the bottom plate (3), target surfaces of the bulletproof plate (1) and the target paper (7) are respectively positioned on two sides of the bottom plate, the master control box (2), the angle measuring sensor (4) and the illumination light source (5) are positioned between the bulletproof plate (1) and the target surfaces, and the upper edge of the bulletproof plate (1) is higher than a working part on the bottom plate (3) to play a role in protection;

the number of the angle measuring sensors is four, the number of the lighting sources is two, the two angle measuring sensors and the lighting source form a group of detection units to form a detection surface, the two groups of detection units respectively form a detection surface and a rear detection surface, and the two detection surfaces are parallel to the target surface of the target paper; when the bullets sequentially pass through the detection surfaces by taking a space straight line as a track, the bullets are illuminated by the corresponding light sources, the deflection angles of the bullets relative to the respective optical axes are detected by the two angle measuring sensors, the deflection angles are sent to the master control box (2), intersection positions of the bullets passing through the detection surfaces are calculated, and then the coordinates of bullet holes in the target surface are calculated by combining the space position relation.

2. The frameless photoelectric target of claim 1, wherein the master control box (2) comprises a master control circuit board (2-1) and a signal interface circuit board (2-2), wherein the master control circuit board (2-1) is connected with an illumination light source (5) through a cable to drive the light source to emit light, the master control circuit board (2-1) is connected with an angle measurement sensor (4) through a cable to collect angle measurement signal data obtained by the angle measurement sensor (4), the master control circuit board (2-1) processes and calculates the collected angle measurement signal to obtain position coordinate data of a bullet hole on a target surface after bullet shooting, the position coordinate data is transmitted through the signal cable (2-3) and an upper computer through the interface circuit board (2-2), and target reporting display and shooting score recording are performed on the upper computer.

3. The frameless photoelectric target according to claim 1, wherein the angle sensor (4) comprises a sensor lens (4-1), a sensor housing (4-2), an internal fixing screw (4-3), a spacer ring (4-4), a sensor chip (4-5), a chip base plate (4-6) and a sensor fixing screw (4-7), the sensor lens (4-1) is glued above the sensor housing (4-2), and the chip base plate (4-6) is fixed in a cavity of the sensor housing (4-2) through the spacer ring (4-4) and the internal fixing screw (4-3); sensor chips (4-5) are connected on the chip bottom plates (4-6), lead wires are welded below the chip bottom plates (4-6) and connected with the master control box (2), and signals acquired by the sensors are sent; the angle measuring sensor (4) is arranged on the bottom plate (3) through two sensor fixing screws (4-7) at the bottom.

4. The frameless photoelectric target of claim 3, wherein the sensor chip (4-5) selects the PSD type, and the position data of the imaging light spot on the chip is obtained through the conversion processing of the photoelectric signal.

5. The frameless photoelectric target according to claim 1, wherein the illumination light source (5) comprises a light source window glass (5-1), a laser (5-2), a light source housing (5-3) and a light source fixing screw (5-4), wherein the laser (5-2) is installed in the light source housing (5-3) through clamping or crimping, welding pins pass through corresponding small holes, a lead is welded in a lower cavity, and the lead passes through a wiring hole on the light source housing (5-3) and is connected with the main control box (2); window glass (5-1) is fixed above the light source shell (5-3) in a cementing mode; the lighting source (5) is arranged on the bottom plate (3) through two light source fixing screws (5-4) at the bottom.

6. The frameless photoelectric target of claim 5, wherein the laser is a semiconductor laser, and the emitted light has a scattering property, and the scattered laser is irradiated upwards through the window glass at a certain angle.

7. The frameless photoelectric target of claim 5 or 6, wherein the laser is replaced by a single LED or an LED array.

8. A live ammunition target reporting method is characterized in that live ammunition target reporting is realized based on the frameless photoelectric target of any one of claims 1 to 7, when a bullet sequentially passes through two detection surfaces and a target surface by taking a spatial straight line as a track, intersection point coordinates of the bullet and the two detection surfaces are determined by using an angle measurement sensor (4) and an illumination light source (5), and then coordinates of a bullet hole on the target surface are calculated through a spatial position relationship.

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