# Shock Wave Pressure Measurement and Calibration Method Based on Bar Pressure Sensor

## TL;DR

This paper introduces a new method to measure and calibrate shock wave pressure using a bar pressure sensor, PDV, and strain measurements.

## Contribution

The novel contribution is an improved measurement and calibration method for shock wave pressure using combined sensor techniques.

## Key findings

- The stress wave measurement results matched theoretical calculations for different wave-impedance materials.
- The peak deviation measured by PDV and strain methods was less than 1.5%.
- The calibration method proved accurate and feasible through SHPB experiments.

## Abstract

In order to correctly measure the shock wave pressure generated by a near-field explosion, and while considering the limitations of the measurement and calibration method of the current bar pressure sensor, an improved shock wave pressure measurement method was designed based on a bar pressure sensor combined with photon Doppler velocimetry (PDV) and strain measurement. By measuring the strain on the pressure bar and the particle velocity on the rear-end face, the shock wave pressure applied on the front-end face of the pressure bar was calculated based on one-dimensional stress wave theory. On the other hand, a calibration method was designed to validate the reliability of the test system. Based on the split-Hopkinson pressure bar (SHPB) loading experiment, the transmission characteristics of stress wave in the bar and the accuracy of the system test results were verified. The results indicated that the stress wave measurement results were consistent with the one-dimensional elementary theoretical calculation results of stress wave propagation in different wave-impedance materials, and the peak deviation measured by PDV and strain measurement method was less than 1.5%, which proved the accuracy of the test method and the feasibility of the calibration method.