Broadband high range accelerometer frequency response characteristic calibrating device and method thereof

Abstract

The invention discloses a broadband high range accelerometer frequency response characteristic calibrating device and a method thereof, belonging to the accelerometer metering technology field. The calibrating device comprises a transmitting tube, a glass projectile, a beryllium metal Hopkinson rod, a test apparatus and the like. The calibrating method comprises the following steps: through employing the above calibrating device, allowing the glass projectile accelerated by high pressure gas to strike the Hopkinson rod, before generation of rod end surface fragmentation, utilizing the glass projectile to excite a calibrated accelerometer along a stress impulse of an ultra-short rise time, through the test apparatus, measuring a frequency response characteristic function of the accelerometer, and realizing calibration of an amplitude frequency characteristic and a phase frequency characteristic. The calibrating device has the following advantages: through the glass projectile of the calibrating device, the Hopkinson rod is striken, an impact pulse of a pulse width of 2.0-8.0 microseconds and amplitude of more than 1.0*104g is generated to excite a high range accelerometer, and the calibrating device is an innovation and a breakthrough in the calibration technology field; the calibrating method provides a maximal pulse width formula needed by frequency response characteristic calibration, and has a great theoretic meaning and an important actual application value.

Description

1. Technical field [0001] The invention discloses a calibration device and method for the frequency response characteristics of a broadband high-range accelerometer, which belongs to the technical field of acceleration sensor measurement, and specifically relates to a calibration device and a calibration method for the frequency response characteristics of a broadband high-range accelerometer. 2. Background technology [0002] The wide-band and high-range accelerometer is mainly used in the acceleration test of high-speed collision, especially the high-speed penetration of multi-layer armor targets (such as steel plates), and provides a basis for the detonation of the preset number of layers of smart fuzes for penetrating bombs. In the multi-layer penetration process, the acceleration signal generated when the projectile hits each layer has a short duration and rich spectrum components, which requires the selected accelerometer to have a higher resonance frequency. At the sa...

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Problems solved by technology

Generally, the frequency range of the excitation table is within 10kHz, and the frequency range of the better excitation table abroad is below 50kHz, such as the 3629C comparison calibration system of the Danish B&K company. The sweeping frequency of the vibrating table is 2.0-40kHz, and the maximum acceleration amplitude within this frequency range is 100g, which cannot meet the requirements for the calibration of high-g-value acceleration sensors

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