A Wide Range Pulse Force Calibration Device

Abstract

The invention relates to a wide-range pulse force calibration device, which belongs to the field of measurement technology. The invention uses a falling-type pulse force generator with a double-hammer combination structure and a standard pulse force measurement system with inertial force error correction. Sensor face-to-face installation and system deviation inertial force correction realize high-precision comparison method calibration. The inertial force correction value is obtained through high-precision acceleration and effective inertial mass; by only changing the material of the hammer body without changing the size to change the mass of the sledgehammer body, it is suitable for the same A hammer body righting mechanism, and realize a wide range of large-scale pulse force; the face-to-face sensor structure and small hammer body are installed on the large hammer body, and small-value pulse force is realized through the inertial force of the small hammer body. Compared with the prior art, the device of the invention has wide measuring range, simple operation and high accuracy, and can realize full-scale calibration from 50N to 200kN on a set of devices.

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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