A combustion-to-detonation wave velocity measurement device

Abstract

The invention discloses a device for measuring the wave speed of combustion to detonation. The problem that the prior art can only obtain the average speed and has poor measuring precision is solved.The device for measuring the wave speed of combustion to detonation comprises a microwave sensor probe, a signal generation module, a cancellation module, a transceiver front end module, a down-conversion module, a signal processing module, a data processing module, a power supply module and the like. The microwave sensor probe is arranged at a specific position in a sample tube and used for synchronous transmission and reception of multi-frequency simple continuous wave microwave signals. Advanced technology such as ultra-low phase noise signal generation, radio frequency cancellation, digital intermediate frequency orthogonal sampling, FFT processing and the like are adopted to accurately measure the echo frequency and phase changes caused by the movement of the wave surface in the process of explosive combustion to detonation, so that the real-time velocity of the wave surface movement is obtained. The device for measuring the wave speed of combustion to detonation has the characteristics of high measurement precision and good safety performance. The device for measuring the wave speed of combustion to detonation is suitable for real-time measurement of wave velocity in the process of explosive charge combustion to detonation.

Description

technical field [0001] The invention relates to a wave velocity measuring device, which is suitable for wave velocity measurement in the process of explosive charge combustion transitioning to detonation. Background technique [0002] To increase the energy level of propellants, higher energy components are generally used. However, the use of these higher energy components brings the risk of increased mechanical sensitivity and shock wave sensitivity and reduced safety to propellant and explosives. The combustion-to-detonation performance of propellant and explosive is one of the important parameters for its safety design and evaluation, and it has important guiding value for its formula design, manufacture, transportation, use and storage. In the process of transition from combustion wave to detonation wave, the measurement of wave velocity is currently more commonly used as ionization probe velocity measuring device, which arranges a series of probes at equal intervals on...

AI Technical Summary

Problems solved by technology

One of its limitations comes from the sample. The propellant sample has a certain thickness, and microwave attenuation is inevitable. The dielectric constant, compressibility, geometry, combustion surface roughness, metal content and particle size distribution of the propellant sample , thermal effects and chemical reactions in the boundary combustion-limited area will have varying degrees of influence on the measurement results; the second limitation comes from the test device, mainly due to the inhomogeneity of the reflection of microwaves on the combustion surface

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