Projectile velocimeter

Abstract

The utility model discloses a projectile velocimeter, and belongs to the technical field of velocimeters. A projectile velocimeter comprises a base and a supporting column, a target bin is arranged at the top of the supporting column, optical measuring windows are arranged on the two opposite sides of the target bin, a mounting frame is arranged on the outer wall of the target bin through a connecting part, and a light emitting module and a light receiving module corresponding to the light emitting module are mounted on the two sides of the mounting frame respectively. The light emitting module and the light receiving module are located on the two sides of the optical measurement window respectively, and an emitting tube is arranged in the target bin; according to the utility model, through detecting and processing the signal time difference when the projectile passes through the two groups of laser surface light curtains, the instantaneous speed of the projectile is calculated according to the distance between the light curtains, and then through adopting an integrated structure among the light emitting module, the light receiving module and the mounting frame, compared with a separated projectile speed measuring structure, on-site light adjustment is not needed, and the measurement accuracy is improved. The device has the advantages of good measurement stability, high repeatability, easiness in maintenance, capability of improving test efficiency and speed measurement reliability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of speed meters, in particular to a projectile speed meter. Background Art

[0002] At present, when measuring the speed of a projectile, most of them are designed in the form of an infrared transmitting tube and a receiving tube. Each corresponding receiving tube must correspond to an infrared transmitting tube. The entire system must ensure that each receiving tube is strictly aligned with the transmitting tube before the system can enter the test state. When in use, the existing projectile speed meter mostly adopts a separate structure assembled on site. However, since infrared light is invisible light, it cannot be seen by the human eye and can only be observed with special equipment. In addition, the infrared receiving tube has a strong directionality in sensing infrared. If the infrared transmitting tube is deformed due to the physical installation structure, it cannot be manually corrected without the help of any professional equipment, which makes it have the hidden dangers of poor stability, low repeatability and difficulty in maintenance. Therefore, the projectile speed meter in the prior art still has certain shortcomings. Utility Model Content

[0003] The utility model aims to solve the problem that the speed meter in the prior art needs to be installed and calibrated on site when used on site, and cannot be manually calibrated without the aid of any professional equipment, and proposes a projectile speed meter.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A projectile velocimeter comprises a base and a support column arranged on the top of the base, a target chamber is arranged on the top of the support column, optical measurement windows are arranged on opposite sides of the target chamber, a mounting frame is arranged on the outer wall of the target chamber through a connecting component, a light transmitting module and a light receiving module corresponding to the light transmitting module are respectively installed on both sides of the mounting frame, the light transmitting module and the light receiving module are respectively located on both sides of the optical measurement window, and a launching tube for launching projectiles is arranged inside the target chamber.

[0006] As a preferred technical solution of the present application, the light emitting module, the light receiving module, the transmitting tube and the optical measurement window are all on the same horizontal line.

[0007] As a preferred technical solution of the present application, the optical transmitting module and the optical receiving module are both installed on the mounting frame via a mounting plate.

[0008] As a preferred technical solution of the present application, the light emitting surface of the optical transmitting module is provided with an optical glass window, and the front end surface of the optical receiving module is installed with an anti-interference optical component.

[0009] As a preferred technical solution of the present application, the launch tube is installed inside the target chamber through a fixing frame.

[0010] As a preferred technical solution of the present application, the connecting component includes a fixed block arranged on the top side wall and both side ends of the mounting frame, an adjusting screw threadedly connected to the fixed block, and a shock-proof adjusting foot cup rotatably connected to the end of the adjusting screw.

[0011] Compared with the prior art, the utility model provides a projectile speed meter, which has the following beneficial effects:

[0012] 1. The projectile speed meter detects and processes the signal time difference when the projectile passes through two sets of laser surface light curtains, and calculates the instantaneous speed of the projectile according to the distance between the light curtains. Secondly, the integrated structure is adopted between the optical transmitting module, the optical receiving module and the mounting frame. Compared with the separate projectile speed measurement structure, it does not require on-site light adjustment, and has the advantages of good measurement stability, high repeatability, easy maintenance, and can improve test efficiency and speed measurement reliability.

[0013] 2. The mounting frame of the projectile speed meter is fixed on the target chamber by four anti-vibration adjustment feet, two on the top and two on the side, which can fine-tune the mounting position and angle. Secondly, the optical glass window is set to facilitate cleaning and maintenance of the light transmitter. The anti-interference optical component is installed on the front end of the light receiving module to eliminate the influence of stray light on the speed measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a side view of the utility model;

[0016] Figure 3 The structure of the mounting frame, optical transmitting module and optical receiving module in the utility model is shown in FIG. Figure 1 ;

[0017] Figure 4 The structure of the mounting frame, optical transmitting module and optical receiving module in the utility model is shown in FIG. Figure 2 .

[0018] In the figure:

[0019] 100, base; 101, support column; 200, target chamber; 201, optical measurement window; 202, launching tube; 2021, fixing frame; 300, mounting frame; 301, optical transmitting module; 3011, optical glass window; 302, optical receiving module; 3021, anti-interference optical component; 303, mounting plate; 304, fixing block; 305, adjusting screw; 306, anti-vibration adjusting foot cup; 400, connecting parts. Implementation

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model. Example

[0021] Reference Figure 1-4 A projectile speed meter comprises a base 100 and a support column 101 arranged on the top of the base 100, a target chamber 200 is arranged on the top of the support column 101, optical measurement windows 201 are arranged on opposite sides of the target chamber 200, a mounting frame 300 is arranged on the outer wall of the target chamber 200 through a connecting component 400, a light transmitting module 301 and a light receiving module 302 corresponding to the light transmitting module 301 are respectively installed on both sides of the mounting frame 300, the light transmitting module 301 and the light receiving module 302 are respectively located on both sides of the optical measurement window 201, and a launching tube 202 for launching projectiles is arranged inside the target chamber 200. When in use, the mounting frame 300 is fixed on the target chamber 200 through the connecting component 400, and the light transmitting module 301 and the light receiving module 302 are respectively installed on the outer wall of the target chamber 200. Located on both sides of the optical measurement window 201, the light emitting module 301 and the light receiving module 302 are turned on to form a surface light source, and then the projectile is launched through the launching tube 202. The signal time difference when the projectile passes through the two sets of laser surface light curtains is used to calculate the instantaneous speed of the projectile according to the light curtain spacing. The light emitting module 301, the light receiving module 302 and the mounting frame 300 adopt an integrated structure, which can be directly fixed on the outside of the target chamber 200 when used. The measuring light curtain has been calibrated before leaving the factory. Compared with the separate projectile speed measurement structure, it does not require on-site light adjustment, and has the advantages of good measurement stability, high repeatability, easy maintenance, and can improve test efficiency and speed measurement reliability. Among them, there are 3 emitted light curtains, all of which are surface light sources, with a width of 10mm and a light curtain spacing of 60mm.

[0022] Reference Figure 2 and Figure 3 In order to realize the accurate detection of the speed of the projectile by the light curtain, the light transmitting module 301, the light receiving module 302, the transmitting tube 202 and the optical measuring window 201 are all on the same horizontal line, so that the projectile can pass through the light curtain in sequence to achieve a good speed measurement effect.

[0023] Reference Figure 3 and Figure 4The optical transmitting module 301 and the optical receiving module 302 are both installed on the mounting frame 300 through the mounting plate 303. The positions of the optical transmitting module 301 and the optical receiving module 302 relative to the mounting frame 300 are relatively fixed, and they form an integrated structure with each other. Therefore, after the light curtain is adjusted and calibrated before use, there is no need to adjust the light on site, which can improve the test efficiency and speed measurement reliability.

[0024] Reference Figure 3 and Figure 4 The light emitting surface of the optical transmitting module 301 is provided with an optical glass window 3011, and the front end surface of the optical receiving module 302 is installed with an anti-interference optical component 3021. Through the optical glass window 3011, it is easy to clean and maintain the optical transmitter, and through the anti-interference optical component 3021 installed on the front end surface of the optical receiving module, the influence of stray light on the scene on the speed measurement can be eliminated, thereby improving the accuracy of detection.

[0025] Reference Figure 1 and Figure 2 The launch tube 202 is installed inside the target chamber 200 through a fixing frame 2021.

[0026] Reference Figure 1-4 The connecting component 400 includes a fixing block 304 arranged on the top side wall and both side ends of the mounting frame 300, an adjusting screw 305 threadedly connected to the fixing block 304, and a shockproof adjusting foot cup 306 rotatably connected to the end of the adjusting screw 305. When in use, the mounting frame 300 is placed outside the target chamber 200, and the shockproof adjusting foot cup 306 is adjusted by the adjusting screw 305, so that the mounting frame 300 and the optical transmitting module 301 and the optical receiving module 302 can be conveniently fixed on the outer wall of the target chamber 200 to complete the on-site installation of the projectile speed meter. At the same time, through the arranged adjusting screw 305 and the shockproof adjusting foot cup 306, when in use, the installation position and angle can be fine-tuned to achieve a better installation position corresponding to the optical measurement window 201, thereby improving the accuracy of speed measurement.

[0027] Specifically, when the projectile speed meter is in use: the mounting frame 300 is placed outside the target chamber 200, and the anti-vibration adjustment foot cup 306 is adjusted by adjusting the screw 305, so that the mounting frame 300 and the optical transmitting module 301 and the optical receiving module 302 can be conveniently fixed on the outer wall of the target chamber 200 to complete the on-site installation of the projectile speed meter. The optical transmitting module 301 and the optical receiving module 302 are calibrated before leaving the factory. Due to the integrated structure, there is no need to calibrate the light curtain again after on-site assembly. Compared with the separate projectile speed measurement structure, there is no need for on-site light adjustment. It has the advantages of good measurement stability, high repeatability, easy maintenance, and can improve test efficiency and speed measurement reliability. Subsequently, the projectile is launched through the launching tube 202, and the signal time difference when the projectile passes through the two sets of laser surface light curtains is used to calculate the instantaneous speed of the projectile according to the light curtain spacing.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A projectile speed meter, comprising a base (100) and a support column (101) arranged on the top of the base (100), characterized in that: A target chamber (200) is arranged on the top of the support column (101), and optical measurement windows (201) are arranged on opposite sides of the target chamber (200). A mounting frame (300) is arranged on the outer wall of the target chamber (200) via a connecting component (400), and a light transmitting module (301) and a light receiving module (302) corresponding to the light transmitting module (301) are respectively mounted on both sides of the mounting frame (300). The light transmitting module (301) and the light receiving module (302) are respectively located on both sides of the optical measurement window (201), and a launching tube (202) for launching a projectile is arranged inside the target chamber (200).

2. A projectile velocity meter according to claim 1, characterized in that: The light transmitting module (301), the light receiving module (302), the transmitting tube (202) and the optical measuring window (201) are all located on the same horizontal line.

3. A projectile velocity meter according to claim 1, characterized in that: The optical transmitting module (301) and the optical receiving module (302) are both mounted on the mounting frame (300) via a mounting plate (303).

4. A projectile velocity meter according to claim 1, characterized in that: The light emitting surface of the light transmitting module (301) is provided with an optical glass window (3011), and the front end surface of the light receiving module (302) is installed with an anti-interference optical component (3021).

5. A projectile velocity meter according to claim 1, characterized in that: The launch tube (202) is installed inside the target chamber (200) via a fixing frame (2021).

6. A projectile velocity meter according to claim 1, characterized in that: The connecting component (400) comprises a fixing block (304) arranged on the top side wall and both side ends of the mounting frame (300), an adjusting screw (305) threadedly connected to the fixing block (304), and a shockproof adjusting foot cup (306) rotatably connected to the end of the adjusting screw (305).

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