Muzzle initial velocity real-time measuring method suitable for micro inertial navigation system for high overload bullets

A technology of real-time measurement and micro-inertial navigation, which is applied in the direction of the device used to measure the time required to move a certain distance, can solve the problems of limited application range, poor autonomy of measurement technology, poor reliability, etc., and achieves wide application range and small size , the effect of strong reliability

Active Publication Date: 2014-02-12
ZHONGBEI UNIV
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Problems solved by technology

[0003] In order to solve the problems of poor autonomy, poor reliability and limited scope of application of the existing projectile muzzle initial velocity measurement technology, the present invention provides a real-time measurement method for muzzle muzzle velocity applicable to a micro-inertial navigation system for highly overloaded projectiles

Method used

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  • Muzzle initial velocity real-time measuring method suitable for micro inertial navigation system for high overload bullets
  • Muzzle initial velocity real-time measuring method suitable for micro inertial navigation system for high overload bullets
  • Muzzle initial velocity real-time measuring method suitable for micro inertial navigation system for high overload bullets

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Embodiment Construction

[0022] The real-time measurement method of the muzzle velocity applicable to the micro-inertial navigation system used for highly overloaded projectiles is realized by the following steps:

[0023] a. Install a group of coils 2 at the front of the inner cavity and the rear of the inner cavity of the muzzle brake 1, and measure the distance between the two coils 2; then energize the two coils 2 respectively, so that the two coils 2 Each generates an induced magnetic field;

[0024] b. Establish the Cartesian coordinate system O-X of the projectile b Y b , and set the projectile center of projectile 3 as the projectile Cartesian coordinate system O-X b Y b The origin, while ensuring the projectile Cartesian coordinate system O-X b Y b OX b The axis is in the same direction as the axis of the projectile 3, and the Cartesian coordinate system of the projectile is O-X b Y b OY b The axis is consistent with the radial direction of the projectile 3;

[0025] c. Install the ...

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Abstract

The invention relates to the measurement technology for muzzle initial velocity of bullets, in particular to a muzzle initial velocity real-time measuring method suitable for a micro inertial navigation system for high overload bullets. The method solves the problems of weak autonomy, weak reliability and limited application range in the existing measurement technology for the muzzle initial velocity of the bullets. The muzzle initial velocity real-time measuring method suitable for the micro inertial navigation system for the high overload bullets is realized by adopting the following steps: (a) two sets of coils are mounted at the front and back parts of an inner cavity of a muzzle brake, and are electrified to generate two induced magnetic fields; (b) a bullet right-angled coordinate system O-XbYb is built; (c) single-shaft magnetoresistive sensors and electronic circuits are respectively mounted in the bullets; (d) when the bullets are shot, the single-shaft magnetoresistive sensors sequentially measure the variations of the two induced magnetic fields; (e) the muzzle initial velocity of the bullets is calculated. The method is suitable for the micro inertial navigation system for the high overload bullets.

Description

technical field [0001] The invention relates to a technique for measuring the muzzle initial velocity of projectiles, in particular to a method for real-time measurement of muzzle muzzle velocity suitable for a micro-inertial navigation system used for highly overloaded projectiles. Background technique [0002] The micro-inertial navigation system for high-overload ammunition is widely used in the guidance and smart transformation of conventional ammunition. In practical applications, whether the initial muzzle velocity of the projectile can be accurately measured directly affects the calculation accuracy of the projectile's outer trajectory, which in turn affects the guidance accuracy and hit rate of the projectile. Under the existing technical conditions, the measurement methods of the projectile's muzzle initial velocity mainly include external measurement method and internal measurement method. Among them, the external measurement method refers to the measurement of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/66
Inventor 李杰秦丽范建英刘俊张晓明唐军郭涛杨卫石云波鲍爱达张松范成叶景增增
Owner ZHONGBEI UNIV
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