CN212340077U - Light curtain target structure - Google Patents

Abstract

The utility model provides a light curtain target structure, which comprises a target box and a detection sensor arranged in the target box, wherein the target box is provided with an incident light hole, and the detection sensor receives and detects a direct light curtain emitted by a light curtain generating device through the light hole; and a first shading mechanism is arranged around an incident light hole outside the target box and used for shielding interference light from a non-direct light source outside the target box. Compared with the prior art, the utility model discloses an add the light screen around the incident unthreaded hole of receiving the target box for the light curtain target can be in the environment of the highlight of white light irradiation or explosion scene explosion fireball work steadily accurately.

Description

Light curtain target structure

Technical Field

The utility model relates to an ammunition power test technical field, concretely relates to light curtain target structure.

Background

The light curtain target is a speed measuring interval intercepting device consisting of a front target and a rear target, when the projectile successively passes through the two target surfaces, the data acquisition system records the time difference delta t of the projectile passing through the two targets, and then the average speed v of the projectile passing through the intercepting device can be calculated by analysis software as delta s/delta t.

The front target and the rear target of the existing light curtain target respectively form a parallel light curtain by a group of transmitting ends and receiving ends, and a photocell in the light curtain target structure is greatly influenced by interference generated by white light irradiation or strong light of an explosion fireball in an explosion field, so that the photocurrent of the photocell is easily slightly changed, and the accurate measurement of the speed of a bullet and a fragment is further influenced.

Disclosure of Invention

An object of the utility model is to provide a light curtain target structure that can be applicable to white light and shine or explosion scene explosion fireball highlight environment.

The utility model provides a light curtain target structure, which comprises a target box and a detection sensor arranged in the target box, wherein the target box is provided with an incident light hole, and the detection sensor receives and detects a direct light curtain emitted by a light curtain generating device through the light hole; and a first shading mechanism is arranged around an incident light hole outside the target box and used for shielding interference light from a non-direct light source outside the target box.

According to the utility model discloses in addition embodiment, first shading mechanism is for setting up the outside light screen of target capsule, this light screen is arranged at least one side of incident unthreaded hole to extend the predetermined distance to target capsule the place ahead.

Further, the light blocking plate is disposed at upper and lower sides or left and right sides of the incident light hole, or the light blocking plate is formed in a closed cylindrical structure so as to surround the incident light hole.

According to a further embodiment of the present invention, the detection sensor is located at a predetermined distance behind the incident pupil.

Further, the target box also comprises a second shading mechanism arranged around the incident light hole inside the target box.

Further, the second light shielding mechanism is a light shielding plate arranged inside the target box, and the light shielding plate is arranged on the upper side, the lower side, the left side and the right side of the incident light hole, or the light shielding plate is formed into a closed cylindrical structure so as to surround the incident light hole.

Furthermore, one end of the inner shading plate is connected with the inner wall of the target box, and the other end of the inner shading plate is abutted against the sensitive end face of the detection sensor.

According to a further embodiment of the invention, the detection sensor is a photocell.

According to another embodiment of the present invention, the light-shielding plate is coated with a light reflection suppressing material.

According to a further embodiment of the present invention, the light screen has an L-shaped cross-section.

Based on above-mentioned technical scheme, compare with prior art, the utility model discloses an add the light screen around the incident unthreaded hole of receiving the target box for the light curtain target can be in the environment of the highlight of white light irradiation or explosion scene explosion fireball accurately work steadily.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic view of a partial structure of a light curtain target according to an embodiment of the present invention;

1. a target box; 2. a first shading strip; 3. a second shading strip; 4. a photovoltaic cell; 5. and (7) mounting the plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

The light curtain speed measuring system, such as a laser light curtain speed measuring system, an X-ray light curtain speed measuring system and the like, mainly comprises a starting target light curtain and a stopping target light curtain, wherein the starting target light curtain and the stopping target light curtain are sequentially arranged on a path in front of the launching device along the launching direction of the projectile or fragment, and the distance between the starting target light curtain and the stopping target light curtain is determined.

Taking the infrared laser light curtain as an example, the infrared laser light curtain comprises a plurality of infrared laser diodes and light curtain targets arranged corresponding to the infrared laser diodes. The infrared laser diodes may be arranged at one side edge of the screen, each infrared laser diode emitting an infrared light beam, the light beams emitted by the plurality of infrared laser diodes forming a light curtain on the screen. The light beams emitted by the plurality of infrared laser diodes can be collimated and focused according to the requirements of the light curtain thickness uniformity and the like.

Light curtain target is used for receiving infrared laser diode sends infrared light beam, as shown in fig. 1, according to the utility model discloses an embodiment, this light curtain target includes target box 1 and sets up the detection sensor in target box 1, be equipped with the incident unthreaded hole on the target box 1, detection sensor passes through the unthreaded hole is received and is surveyed infrared light beam.

The detection sensor may be, for example, a photocell 4 mounted behind the incident aperture of the capsule 1. As shown in fig. 1, the photovoltaic cell 4 is fixedly arranged in the target capsule 1 by means of a mounting plate 5.

When the light curtain target is irradiated by white light or has intense light of an explosion fireball in an explosion field, the interference light also enters the incident light hole and interferes the detection result of the photocell, so that the speed measurement accuracy of the projectile or fragment is influenced.

The utility model discloses a solve above-mentioned problem, set up first shading mechanism 2 around the incident unthreaded hole of 1 outside of target box for the shielding comes from the interference light of 1 outside indirect illumination source of target box, makes only come from the light curtain generating device of other one side, just can be received and detect by photocell 4 like the direct illumination light curtain that infrared laser diode sent.

According to the utility model discloses an embodiment, first shading mechanism is for setting up 1 outside light screen 2 of target box, this light screen 2 is arranged at least one side of incident unthreaded hole to extend the predetermined distance to target box the place ahead. Preferably, the light shielding plates 2 are disposed at upper and lower sides or left and right sides of the incident light hole. In some embodiments, or alternatively, the shutter plate is formed as a closed cylindrical structure, such as a circular cylinder or a square cylinder, so as to surround the incident light aperture.

Optionally, the light shielding plate 2 has an L-shaped cross-section, so that it is easy to mount the light shielding plate with one side plate outside the target capsule 1, for example, by means of a connector or adhesive bonding.

According to the utility model discloses in addition, photocell 4 is located incident unthreaded hole rear predetermined distance to even if can be when light screen 2 only has short extension length, still can make the part can probably get into the non-direct interference light can't be received by photocell and detect, when reducing the light screen size, still can guarantee good anti-interference effect.

According to the utility model discloses in addition, set up second shading mechanism 3 around the incident light hole of target box 1 inside for the shielding comes from the interference light of the external non-direct light source of target box 1, makes only the light curtain generating device who comes from other one side, the direct light curtain that sends like infrared laser diode just can be received by photocell 4 and detect.

Further, the second light shielding mechanism is a light shielding plate 3 disposed inside the target box 1, and the light shielding plate 3 is disposed on at least one side of the incident light hole and extends a predetermined distance to the rear of the inside of the target box. Preferably, the light shielding plates 3 are disposed at upper and lower sides or left and right sides of the incident light hole. In some embodiments, the light shield is formed as a closed cylindrical structure, such as a circular cylinder or a square cylinder, surrounding the incident light aperture.

Preferably, in order to prevent light leakage inside the light curtain receiving module from interfering the photocell, one end of the inner light shielding plate 3 is connected with the inner wall of the target box, and the other end of the inner light shielding plate abuts against the sensitive end face of the photocell 4.

Optionally, the light shielding plate 3 has an L-shaped cross section, so that it is easy to mount the light shielding plate inside the target box 1 with one side plate thereof, for example, by means of a connector or bonding.

In order to prevent the interference light through the connection clearance reflection between light screen 2, 3 and the 1 wall of target box advances photocell 4, the utility model discloses the spraying restraines the light reflection material on externally light screen 2, inside light screen 3 respectively to further shield external interference light.

The utility model provides a light curtain target structure through add the light screen around the incident unthreaded hole that receives the target box for the light curtain target can be in the environment of the highlight of white light irradiation or explosion scene explosion fireball work steadily accurately.

The above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. A light curtain target structure comprises a target box and a detection sensor arranged in the target box, wherein an incident light hole is formed in the target box, and the detection sensor receives and detects a direct light curtain emitted by a light curtain generating device through the light hole; the target box is characterized in that a first shading mechanism is arranged around an incident light hole outside the target box and used for shielding interference light from a non-direct light source outside the target box.

2. The light curtain target structure as claimed in claim 1, wherein the first light shielding mechanism is a light shielding plate provided outside the target box, the light shielding plate being disposed at least one side of the incident light aperture and extending a predetermined distance forward of the target box.

3. The light curtain target structure as claimed in claim 2, wherein the light blocking plate is disposed at upper and lower sides or left and right sides of the incident light hole, or the light blocking plate is formed in a closed cylindrical structure so as to surround the incident light hole.

4. The light curtain target structure of claim 1 wherein the detection sensor is located a predetermined distance behind the entrance pupil.

5. The light curtain target structure of claim 4 further comprising a second light blocking mechanism disposed around the entrance pupil inside the target capsule.

6. The light curtain target structure as claimed in claim 5, wherein the second light shielding mechanism is a light shielding plate provided inside the target box, the light shielding plate being provided on both upper and lower sides or both left and right sides of the incident light hole, or the light shielding plate being formed in a closed cylindrical structure so as to surround the incident light hole.

7. The light curtain target structure as claimed in claim 6, wherein one end of the light shielding plate is connected to the inner wall of the target box, and the other end of the light shielding plate abuts against the sensitive end face of the detection sensor.

8. The light curtain target structure of any one of claims 1 to 7 wherein the detection sensor is a photocell.

9. The light curtain target structure as claimed in any one of claims 2, 3, 6 or 7, wherein the light shielding plate is coated with a light reflection suppressing material.

10. The light curtain target structure of any one of claims 2, 3, 6 or 7, wherein the light blocking plate has an L-shaped cross-section.

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