Wide-range pulse force calibration device

Abstract

The invention relates to a wide-range pulse force calibration device and belongs to the technical filed of metering. The calibration device realizes high-precision comparison method calibration by utilizing a falling-body-type pulse force generator in a double-hammer composite structure and a standard pulse force measuring system having an inertia force error correction function, and by adopting a mode of face-to-face installation of a reference sensor and a calibrated sensor and system deviation inertia force correction; the inertia force correction value is obtained through high-precision acceleration and effective inertia mass; by changing the material of the hammer but not the size thereof to change the mass of a big hammer, so that the hammer is allowed to be suitable for the same hammer centering mechanism, and wide-range large-magnitude pulse force is realized; and by arranging the face-to-face sensor structure and a small hammer on the big hammer, small-magnitude pulse force is realized through inertia force of the smaller hammer. Compared with the prior art, the device is wide in range, simple to operate and high in accuracy; and full-range calibration, from 50 N to 200kN, can be realized in one set of device.

Description

technical field [0001] The invention relates to a pulse force calibration device, in particular to a wide range pulse force calibration device, belonging to the technical field of measurement. Background technique [0002] In the fields of structural loading, component testing, engine testing, crash testing, material testing, aviation biomechanics, and aviation industry automation control and monitoring in the defense industry, various dynamic force measurements exist widely. In the measurement of various dynamic forces, most of them are periodic pulse force and pulse force. Among them, the pulse force measurement is the most extensive, such as various collision impact forces, space receptivity, ejection force of pilots parachuting, various explosive forces, rocket and missile test thrust, and aircraft landing gear landing force, etc., as small as 1kN (people running landing force) or even smaller (micromechanical contact force), as large as 100kN (rocket engine thrust), 50...

AI Technical Summary

Problems solved by technology

[0003] The previous domestic pulse force calibration devices can only perform large-scale pulse force calibration, or can only perform small-amplitude pulse force calibration, and cannot perform complete calibration with a wider range

A typical large-value pulse force calibration device is the drop hammer pulse force calibration device of the China Institute of Metrology. The principle of this device is relatively simple, and its disadvantages are poor lateral motion control during the impact of the hammer body, limited lower limit of force value, and low accuracy. Low

A typical small-amplitude pulse force calibration device is the 2kN small-scale pulse force calibration device of the AVIC Metrology Institute. The structure of this device is relatively complicated, and its disadvantage is that the upper limit of the calibration range is relatively small

The impact force calibration device developed by the German Federal Institute of Physics and Technology (PTB) in recent years uses the impact of two mass blocks in the horizontal plane to generate impact force, and uses air bearing shafting to reduce friction. The dynamic force on the force sensor can be traced to Mass and acceleration, the structure of the device is relatively complex

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