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Method, device and system for measuring large-span rotational speed of projectile based on geomagnetic information

An information measurement and large-span technology, applied in the field of measurement, can solve problems such as the inability to achieve large-span measurement

Active Publication Date: 2021-12-21
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method, device and system for measuring the large-span rotational speed of projectiles based on geomagnetic information, so as to at least solve the technical problem that the prior art can only measure the range of low rotational speeds of projectiles and cannot realize the measurement of large-span ranges

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  • Method, device and system for measuring large-span rotational speed of projectile based on geomagnetic information
  • Method, device and system for measuring large-span rotational speed of projectile based on geomagnetic information
  • Method, device and system for measuring large-span rotational speed of projectile based on geomagnetic information

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Embodiment 1

[0036] According to an embodiment of the present invention, a method for measuring the large-span rotational speed of a projectile based on geomagnetic information is provided. The projectile is provided with a geomagnetic sensor for measuring the geomagnetic signal, and the method includes performing the following steps cyclically until all the original values ​​of the geomagnetic signal are calculated:

[0037] Step S102, acquiring the original value of the geomagnetic signal in the current window of the geomagnetic signal, and performing normalization processing on the original value of the geomagnetic signal in the current window.

[0038]In an exemplary embodiment, before obtaining the original value of the geomagnetic signal in the current window of the geomagnetic signal, the method further includes: preset the time setting range of the first time window of the geomagnetic signal, The first time window is used as the current window, wherein the time setting range is 100...

Embodiment 2

[0050] According to an embodiment of the present invention, a method for measuring a large-span rotational speed based on geomagnetic information is provided, such as figure 2 As shown, the method includes the following steps:

[0051] Step S202, acquiring the original value of the geomagnetic signal.

[0052] The original values ​​of the geomagnetic signals of the X-axis, the Y-axis and the Z-axis are respectively obtained through the measurement of the geomagnetic sensor. The schematic diagram of the coordinate system of X-axis, Y-axis and Z-axis is as follows image 3 shown. The original value of the acquired geomagnetic signal is as follows Figure 4 shown.

[0053] In step S204, a normalization process is performed to complete the rotation speed calculation.

[0054] Firstly, the original value of the geomagnetic signal should be normalized. The role of normalization processing is to summarize and unify the original value of the geomagnetic signal obtained , so a...

Embodiment 3

[0074] According to an embodiment of the present invention, another method of large-span rotational speed measurement based on geomagnetic information is provided, such as Figure 9 As shown, the method includes the following steps:

[0075] Step S902, acquiring the original value of the geomagnetic signal.

[0076] The original values ​​of the geomagnetic signals of the X axis, the Y axis and the Z axis are respectively measured by the geomagnetic sensor.

[0077] Step S904, setting the time setting range of the first time window, and using the first time window as the current window.

[0078] The time setting range of the first time window is set to 100 ms, of course, this application is not limited to 100 ms, and may be other values. After setting the time setting range of the first time window, take the first time window as the current window and enter the loop.

[0079] Step S906, obtaining the maximum value, minimum value and average value of the original values ​​in ...

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Abstract

The invention discloses a method, device and system for measuring the large-span rotational speed of a projectile based on geomagnetic information. The projectile is provided with a geomagnetic sensor for measuring the geomagnetic signal, and the method includes cyclically executing the following steps until all the original values ​​of the geomagnetic signal are calculated: obtaining the original value of the geomagnetic signal in the current window of the geomagnetic signal Value, normalize the original value of the geomagnetic signal in the current window; calculate the period of the sine wave in the current window based on the original value of the normalized geomagnetic signal, and based on the current The cycle of the sine wave in the window is used to calculate the current rotational speed of the projectile; the time setting range of the next window is determined based on the cycle of the sine wave in the current window, and the next window is used as the current window. The invention solves the technical problem that the prior art can only measure the range of the low rotational speed of the missile body and cannot realize the measurement of the large span range.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a method, device and system for measuring the large-span rotational speed of a projectile based on geomagnetic information. Background technique [0002] When studying the law of projectile motion, the rotational speed of the projectile is one of the most important parameters of artillery and ballistic elements. The speed of some projectiles will drop from 200-300 rpm to zero or even start to reverse within ten seconds when they are in motion. Such a large speed span also brings certain difficulties to the measurement of projectile speed. At present, there are various methods for testing the rotational speed of projectiles, but they also have certain limitations. [0003] Among the methods of projectile speed test, the speed test system of the accelerometer method is very cumbersome; the solar azimuth method has stricter requirements on weather factors; Error: Although the gyroscope ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B35/02G01P3/44
CPCF42B35/02G01P3/44
Inventor 刘宁赵文江戚文昊冯群倬苏中刘福朝李连鹏
Owner BEIJING INFORMATION SCI & TECH UNIV