A bullet speedometer

Abstract

The utility model relates to bullet speed measurement technical field discloses a kind of bullet speed meter, including one for the passage of bullet horizontal crossing, at least two groups of light surface generating components are arranged along the passage extension direction interval, each group of the light surface generating component includes respectively the laser and receiving member arranged in the upper side of passage, the receiving member is used to receive the light of the laser, the light of the laser and the receiving member form a sector light surface, the vertical section of the passage in its extension direction is adapted to the sector light surface.The utility model, passage uses the passage of fan-shaped longitudinal section, with greater speed range, ensure that the laser intensity received at each point of light receiving surface is consistent, ensure the high sensitivity of laser measurement, improve the accuracy of overall speed measurement.

Description

Technical Field

[0001] This utility model relates to the field of bullet velocity measurement technology, specifically a bullet velocity measuring instrument. Background Technology

[0002] With the rapid development of society and economy, the performance of firearms is getting better and better. In reality, firearms are one of the most commonly used weapons to prevent and stop crime. Bullet velocity testing is used to determine whether a firearm can achieve its pre-designed performance, as well as to test the explosive force of the bullet and the rate of velocity decay at different positions in flight. Bullet velocity testing is one of the important indicators for firearm quality inspection.

[0003] In existing bullet velocity meters / devices / equipment, the light receiving surface of the channel is typically planar. This results in significant differences in light intensity at different points on the same plane, affecting the sensitivity of the entire light measurement surface and consequently reducing the accuracy of subsequent velocity measurements. Furthermore, the velocity measurement range of the entire channel is limited, which is detrimental to practical applications. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bullet velocity meter that solves the problem that in existing bullet velocity meters / devices / equipment, the light intensity of the light receiving surface varies greatly at different points on the same plane, affecting the sensitivity of the entire light measurement surface and reducing the accuracy of subsequent velocity measurements; at the same time, the velocity measurement range of the entire channel is limited, which is not conducive to practical applications.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A bullet velocity meter includes a channel through which a bullet passes horizontally. At least two sets of light-generating components are spaced apart along the extension direction of the channel. Each set of light-generating components includes a laser and a receiver respectively disposed on the upper and lower sides of the channel. The receiver is used to receive the light emitted by the laser. The light emitted by the laser and the receiver form a fan-shaped light surface. The vertical cross-section of the channel in its extension direction is adapted to the fan-shaped light surface.

[0007] Preferably, the vertical cross-section of the channel is fan-shaped, the top surface of the channel is arc-shaped and the bottom surface is flat, and the distance between the laser installation position and the bottom surface of the channel is greater than or equal to a preset value.

[0008] Preferably, the channel is composed of plates made of light-absorbing material, and the plates have gaps for the fan-shaped light surface to pass through.

[0009] Preferably, both the laser and the receiver are installed and fixed in a fully enclosed manner.

[0010] Preferably, the laser is a linear laser generator, and the receiver consists of multiple linearly arranged receivers, with photodiodes fixed on the receivers for receiving laser light.

[0011] Preferably, it also includes an upper housing and a lower housing that is detachably installed with the upper housing. The lower housing has an electric push rod assembly arranged in its inner cavity to adjust the height of the upper housing from the ground. The channel is located in the inner cavity of the upper housing, and the laser and receiver are enclosedly installed in the cavity space formed by the upper housing and the channel.

[0012] Preferably, the upper part of the upper box is provided with an openable cover, the bottom surface of the channel is provided with multiple maintenance plates that can be detachably installed, and the lower box is provided with side doors on both sides.

[0013] Preferably, the upper housing is equipped with a display component and a label printing component.

[0014] Preferably, the lower housing includes a middle housing and a bottom housing, the upper housing is detachably connected to the middle housing, the inner cavity of the bottom housing is provided with an electric push rod assembly for supporting and limiting the middle housing, and the middle housing is positioned above the bottom housing.

[0015] Preferably, the electric push rod assembly includes multiple electric push rods, which are fixedly disposed at the bottom of the base box. Each movable end of the electric push rod is detachably mounted with a support base, which is fixedly disposed on the end face of the middle box.

[0016] This utility model has the following beneficial effects:

[0017] (1) The bullet velocity meter adopts a channel with a fan-shaped longitudinal section, which can have a larger velocity measurement range than the conventional rectangular channel. At the same time, it can ensure that the laser intensity received at each point of the light receiving surface is consistent, ensuring high sensitivity of laser measurement and improving the overall accuracy of velocity measurement.

[0018] (2) The bullet velocity measuring device can be divided into several parts by setting an upper box, a middle box and a bottom box. The middle box and the bottom box form a support base. The channel in the upper box is used to measure the velocity of passing bullets. The whole device is easy to disassemble and assemble, and can be disassembled, transported and installed as needed. The electric push rod assembly can adjust the height of the upper box as needed, so as to adapt to the bullet velocity measurement needs with different initial heights. Attached Figure Description

[0019] Figure 1 This is a first-person perspective schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0021] Figure 3 This is a schematic diagram of the layout structure of the laser and receiver of this utility model;

[0022] Figure 4 This is a schematic diagram of the channel layout structure of this utility model;

[0023] Figure 5 This is a schematic diagram showing the disassembled structure of each component of this utility model;

[0024] Figure 6 This is a schematic diagram of the overall structure of the bottom box of this utility model.

[0025] In the diagram: 1. Upper housing; 11. Passageway; 111. Opening plate; 112. Top plate; 113. Mounting beam; 114. Mounting frame; 12. Gap; 13. Laser; 14. Receiving component; 15. Handling port; 16. Inspection plate; 17. Top cover; 18. Heat dissipation base plate; 2. Middle housing; 21. Side door of the housing; 3. Bottom housing; 31. Electric push rod assembly; 32. Support plate; 33. Support base; 4. Display assembly; 5. Label printing assembly. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] A bullet velocity meter includes a channel 11 through which a bullet passes horizontally. At least two sets of light-generating components are spaced apart along the extension direction of the channel 11. Each set of light-generating components includes a laser 13 and a receiver 14 respectively disposed on the upper and lower sides of the channel 11. The receiver 14 is used to receive the light emitted by the laser 13. The light emitted by the laser 13 and the receiver 14 form a fan-shaped light surface. The vertical cross section of the channel 11 in its extension direction is adapted to the fan-shaped light surface.

[0029] Specifically, such as Figure 1 As shown, in this technical solution, when a bullet passes through channel 11, the bullet will first pass through the first fan-shaped light surface. When it passes through the second fan-shaped light surface, the third fan-shaped light surface, and so on, since the distance between the fan-shaped light surfaces is known, the bullet's speed can be obtained by recording the time it takes for the bullet to pass through each fan-shaped light surface.

[0030] Existing channels typically use rectangular channels or other channels with planar light receiving surfaces for speed measurement. In this case, the distance from the laser emitted by the laser to various points on the linear plane of the rectangular channel is inconsistent, resulting in inconsistent laser intensity received at different points. The different received laser intensities will change the overall sensitivity of the laser measurement, which in turn will affect the sensitivity of the entire laser measurement surface, thus affecting the accuracy of the speed measurement.

[0031] In this embodiment, the vertical cross-section of channel 11 is fan-shaped, the top surface of channel 11 is curved, and the bottom surface is flat. The distance between the laser 13 installation position and the bottom surface of channel 11 is greater than or equal to a preset value. In practical applications, a receiver is usually used to receive light. Due to the limitations of the shape and size of the receiver, ensuring that the light receiving surface is completely curved is only theoretical.

[0032] In this embodiment, channel 11 is composed of plates made of light-absorbing material, with slits on the plates for the fan-shaped light surface to pass through. The channel composed of light-absorbing material plates can reduce the reflection of light emitted by the laser on the plate surface, thereby forming multiple light surfaces and affecting the overall accuracy of speed measurement.

[0033] Furthermore, such as Figure 3 and Figure 4 As shown, in a specific application, the channel 11 includes multiple top plates 112 and multiple open plates 111. The multiple open plates 111 are sequentially fixedly connected to the lower end face of the top plate 112. The gap 12 is formed by the gaps arranged between two pairs of open plates 111 and top plates 112. The receiving element 14 is fixedly installed on the upper end face of two pairs of top plates 112 and is used to receive the laser passing through the gap.

[0034] In this embodiment, the laser 13 is a linear laser generator, and the receiver 14 consists of multiple linearly arranged receivers, each with a photodiode fixed on it for receiving the laser beam. In this technical solution, the photodiode is used to receive the linear laser beam emitted by the linear laser generator, thereby forming a fan-shaped light surface between the multiple receivers and the laser.

[0035] See details Figure 3 and Figure 4 As shown, multiple receivers are arranged close together on the top plate along the direction of the gap. The light emitted by the laser 13 is received by the receivers, thus forming a fan-shaped light surface in the space between the open plate and the top plate. When a bullet passes through the fan-shaped light surface, the photodiode is blocked and cannot receive the light, thus sending a signal of the bullet's passage to the analysis and processing system, so as to subsequently obtain the time between the bullet passing through each pair of fan-shaped light surfaces.

[0036] In this technical solution, receivers are installed sequentially along the upper part of the top plate, so that the receiving faces of multiple receivers form a light receiving surface, which is approximately arc-shaped. This provides a larger speed measurement range compared to a conventional rectangular channel. Furthermore, the laser beams scattered by the laser beams reach the approximately arc-shaped light receiving surface at approximately equal distances, ensuring consistent laser intensity and preventing significant differences in laser intensity at different points on the receiving surface from affecting the overall speed measurement accuracy.

[0037] To ensure the stability of the entire channel installation, an installation beam 113 is fixedly installed on the lower end face of the open plate 111, and the two ends of the installation beam 113 are fixedly connected to the upper box 1.

[0038] Furthermore, to ensure that a single laser 13 can emit a fan-shaped beam that completely covers the channel, a mounting frame 114 is fixedly mounted on the mounting beam 113. The laser 13 is fixedly mounted in the middle of the mounting frame 114, and the distance between the laser 13 and the lower end face of the open plate 111 is greater than or equal to a preset value (i.e., the minimum distance to ensure that the light emitted by the laser completely covers the channel). (Refer to...) Figure 4 As shown, the mounting frame is U-shaped, and the longitudinal height from the bottom surface of the middle part to the farthest end face is not less than the preset value. The preset value is usually used to save on sheet metal production costs.

[0039] Example 2

[0040] like Figure 1 and Figure 5 As shown, the bullet velocity meter also includes an upper housing 1 and a lower housing that can be detachably installed with the upper housing 1. By setting up the upper housing 1 and the lower housing, the entire velocity meter can be divided into two parts. The lower housing serves as a support base, and the channel 11 in the upper housing 1 is used to measure the velocity of passing bullets. The whole unit is easy to disassemble, transport, and install as needed.

[0041] Both the laser 13 and the receiver 14 are installed and fixed in a fully enclosed manner. Specifically, the channel 11 is located inside the upper housing 1, and the laser 13 and the receiver 14 are enclosedly installed within the cavity space formed by the upper housing and the channel. See details below. Figure 3 As shown.

[0042] In practical applications, the upper housing also integrates display components and label printing components. In practical applications, the electrical control components can be fully integrated into the upper housing 1, allowing the entire upper housing 1 to be installed with the lower housing after all the components within the upper housing 1 have been installed.

[0043] After obtaining the bullet velocity information, it is displayed by the display component 4 integrated on the upper housing, and the label printing component 5 simultaneously prints a bullet velocity information label for subsequent firearm filing.

[0044] In practical applications, the receiver can be electrically connected to the controller via a photodiode. The controller is used to control the display component 4 to display information and the label printing component 5 to start synchronously. Other techniques commonly used in the field can also be employed to achieve cooperation between the receiver 14, the display component 4, and the label printing component. However, since the cooperation method is not the focus of this application, it will not be elaborated upon here.

[0045] Furthermore, symmetrical transport ports 15 are arranged on both sides of the upper housing 1, as shown in the details. Figure 2 and Figure 3 As shown. In this layout, personnel can quickly lift and separate the upper housing 1 through the handling port 15 for maintenance or disassembly and relocation of the upper housing 1.

[0046] Because the initial firing height of bullets varies among firing stands manufactured by different companies, existing bullet velocity meters cannot meet the velocity measurement requirements of various firing stands. Therefore, an electric push rod assembly for supporting and limiting the middle box is installed in the inner cavity of the lower housing, allowing the height of the upper housing 1 to be adjusted as needed, thereby adapting to the velocity measurement requirements of bullets with different initial heights.

[0047] In practical applications, the lower box includes a middle box 2 and a bottom box 3. The upper box 1 and the middle box 2 are detachably connected. The inner cavity of the bottom box 3 is provided with an electric push rod assembly 31 for supporting and limiting the middle box 2. The middle box 2 is covered above the bottom box 3. The electric push rod assembly 31 includes multiple electric push rods. The electric push rods are fixedly installed at the bottom of the cavity of the bottom box 3. The movable ends of the electric push rods can be detachably installed with a support base 33. The support base 33 is fixedly installed on the end face of the middle box 2.

[0048] like Figure 6 As shown, in a preferred embodiment, at least two electric push rods have their movable ends fixedly connected to support plates 32, which support the middle portion of the lower end face of the middle box 2. The support plates 32 ensure that the middle box 2 is stably pushed up during the height change process caused by the electric push rods, preventing deformation of the middle box 2 due to excessive local force, which could then compress the upper box 1, alter the distance between the laser and the receiver, and affect the accuracy of the speed measurement results.

[0049] like Figure 2 and Figure 5As shown, in this technical solution, the upper part of the upper housing 1 is covered with an upper cover 17, and multiple maintenance plates 16 are detachably installed at the bottom of the channel 11. Side doors 21 are provided on both sides of the middle housing. The upper cover 17 and maintenance plates 16 facilitate routine maintenance and replacement of the receiver and laser. The side doors 21 on both sides of the middle housing facilitate routine maintenance and replacement of the electric push rod components installed inside the bottom housing 3.

[0050] In this embodiment, such as Figure 5 As shown, a heat dissipation base plate 18 is provided at the bottom of the upper chamber 1, and heat dissipation grid holes are provided on the side walls of the lower chamber 3 to ensure the heat dissipation performance of the entire upper chamber 1 and improve the service life of the test chamber. In practical applications, grid holes can also be provided on the side walls of the lower chamber to prevent heat from accumulating in the inner cavity of the lower chamber, thereby affecting the service life of the electric push rod assembly.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bullet velocity measuring device, characterized in that, It includes a channel through which a bullet passes horizontally, and at least two sets of light-generating components are spaced apart along the extension direction of the channel. Each set of light-generating components includes a laser and a receiver respectively disposed on the upper and lower sides of the channel. The receiver is used to receive the light emitted by the laser. The light from the laser and the receiver form a fan-shaped light surface. The vertical cross-section of the channel in its extension direction is adapted to the fan-shaped light surface.

2. The bullet velocity measuring device according to claim 1, characterized in that: The vertical cross-section of the channel is fan-shaped, the top surface of the channel is arc-shaped and the bottom surface is flat, and the distance between the laser installation position and the bottom surface of the channel is greater than or equal to a preset value.

3. The bullet velocity measuring device according to claim 2, characterized in that: The channel is composed of panels made of light-absorbing material, with slits on the panels for the fan-shaped light surface to pass through.

4. The bullet velocity measuring device according to claim 2, characterized in that: Both the laser and the receiver are installed and fixed in a fully enclosed manner.

5. The bullet velocity measuring device according to claim 4, characterized in that: The laser is a linear laser generator, and the receiver consists of multiple linearly arranged receivers, with photodiodes fixed on the receivers for receiving laser light.

6. The bullet velocity measuring device according to any one of claims 1-5, characterized in that: It also includes an upper housing and a lower housing that is detachably installed with the upper housing. The lower housing has an electric push rod assembly arranged in its inner cavity to adjust the height of the upper housing from the ground. The channel is set in the inner cavity of the upper housing, and the laser and receiver are enclosedly installed in the cavity space formed by the upper housing and the channel.

7. The bullet velocity measuring device according to claim 6, characterized in that: The upper part of the upper box is equipped with an openable cover, the bottom surface of the channel is detachably equipped with multiple inspection plates, and the lower box is provided with side doors on both sides.

8. The bullet velocity measuring device according to claim 6, characterized in that: The upper housing is equipped with a display component and a label printing component.

9. The bullet velocity measuring device according to claim 6, characterized in that: The lower housing includes a middle housing and a bottom housing. The upper housing is detachably connected to the middle housing. The inner cavity of the bottom housing is provided with an electric push rod assembly for supporting and limiting the middle housing. The middle housing is placed on top of the bottom housing.

10. The bullet velocity measuring instrument according to claim 9, characterized in that: The electric push rod assembly includes multiple electric push rods, which are fixedly installed at the bottom of the base box. Each movable end of the electric push rod is detachably mounted with a support base, which is fixedly installed on the end face of the middle box.

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