Shock wave position and waveform sensor based on parallel resistor array

Abstract

The invention discloses a shock wave position and waveform sensor based on a parallel resistor array, which comprises a sample, a probe support, a trigger probe, a plurality of electric probes, a first resistor, a capacitor, a power supply, a charging resistor and an oscilloscope, the probe support is provided with trigger probe holes and at least one column of electric probe holes, the electric probes and the electric probe holes are arranged in a one-to-one correspondence manner, and the first resistor is connected with the capacitor. One end of each electric probe penetrates through the corresponding electric probe hole, the other end of each electric probe is connected with a second resistor, the multiple second resistors are connected in parallel, and the ends, away from the electric probes, of the multiple second resistors are connected with an oscilloscope through coaxial cables. When the shock wave position and waveform sensor is in a steady state, current flows through a plurality of connecting wires, and a plurality of second resistors are sequentially connected into a circuit, so that the magnitude of the current flowing through the plurality of wires is changed at the same time, equivalently, parasitic inductors of different connecting wires are connected in parallel, the equivalent inductance value is reduced, and the influence of measurement noise on voltage sudden change point interpretation is reduced. And the time precision of voltage abrupt change point interpretation is improved.

Description

technical field [0001] The invention relates to the field of shock compression, in particular to a shock wave position and waveform sensor based on a parallel resistance array. Background technique [0002] The propagation law and stability of shock waves have always been the focus of astrophysics, inertial confinement fusion and explosion mechanics. In practical engineering applications, the shock wave will deform when it reaches any interface. The specific deformation characteristics are closely related to the physical properties of the material. Scholars have carried out some useful explorations through theory and experiments. In terms of theory, D'yakov first studied the stability of shock waves by using non-uniform disturbances, and gave a stability criterion. He found that in the case of instability, the shock wave disturbances increased exponentially with time. Lordanskii has a different view. He believes that the shock wave perturbation follows the law of exponentia...

AI Technical Summary

Problems solved by technology

In the experiment, it was found that factors such as the parasitic inductance of the electric probe connection wire seriously affect the interpretation accuracy of the voltage signal of the series resistive sensing circuit

The later voltage mutation point in the step-down voltage signal will become smooth, and after being superimposed with the measurement noise, the identification accuracy of the voltage mutation moment will drop significantly

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