Shock wave pressure measuring device and method for parallel-combined dielectric elastomer

Abstract

The invention discloses a shock wave pressure measuring device for a parallel-combined dielectric elastomer, and a test method, and the device comprises a base plate and four groups of rectangular sensing units laid on the upper surface of the base plate, wherein four corners of each group of sensing units are fixed on the base plate by angle blocks through screws, the sensing units are composed of a single-layer dielectric elastomer thin film and a flexible conductive cloth both having the upper and lower surfaces evenly brushed with flexible electrodes, the flexible electrode on the upper surface is in screw connection to the screw at the left bottom of the sensing units through the flexible conductive cloth, the flexible electrode on the lower surface is in screw connection to the screwat the right bottom of the sensing units through the flexible conductive cloth, and the bottom end of the screw at the left bottom and the bottom end of the screw at the right bottom of the four groups of sensing units are respectively connected and accessed into a capacitance meter in sequence through wires. At the same time, the invention discloses a test method of the measuring device. The invention improves the accuracy of shock wave pressure measurement by means of parallel combination, and the device has the characteristics of low production cost and simple measurement method.

Description

technical field [0001] The invention belongs to the field of damage test, and in particular relates to a shock wave pressure measuring device and a measuring method of a parallel combined dielectric elastic body. Background technique [0002] The shock wave pressure is the most important damage element in the explosion force field, and the accurate measurement of its load is of great significance for analyzing the damage effect of the target structure. At present, the pressure sensor and the effect target device are mainly used to measure the shock wave pressure in the explosion test. Although the pressure sensor can obtain the shock wave pressure more accurately, the cost of this method is relatively high, and it cannot be widely used in the explosion power test; the effect The target device is mainly based on the plastic deformation of the metal sheet to characterize the peak pressure, but the device has human errors in determining the maximum deformation position and the ...

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Problems solved by technology

The invention patent "a flexible pressure sensor based on dielectric elastic polymer and the method of sensing pressure" provides a pressure measurement device based on dielectric elastomer, which is obtained according to the relationship between pressure and film deformation and capacitance change. Pressure, the device uses a series combination of multi-layer film sandwich structure, combined with the series characteristics of capacitance, the measured capacitance value will decrease with the increase of the number of series film layers, resulting in the decline of pressure measurement accuracy, and in the pressure The deformation of each layer of film after series combination under load is not uniform, resulting in a decrease in the stability of the measurement results

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