Design Of High Speed And Large Dynamic Wireless Detection Node For Shock Wave Overpressure Field Based On Zynq

With the finalization of the design of high-power new weapons in various countries,the accurate evaluation of weapon performance is becoming more and more important.As the main killing factor of ammunition explosion,shock wave is an important basis for evaluating the killing power of weapon warhead.The effective acquisition of shock wave signal is the key to objectively and accurately evaluate the blasting power of weapon system.In the stage of weapon and ammunition combat effectiveness assessment,due to the characteristics of diverse targets,great damage power and high real-time evaluation,the shock wave test system is required to have the characteristics of high precision,large dynamics,easy deployment and modularization.Most of the existing shock wave test systems are applicable to the static explosion quantitative test in the ammunition research and development stage,that is,the testers estimate the peak value of shock wave overpressure in advance and select the sensor with appropriate range for test.Under operational conditions,due to the unknown initiation point and uneven distribution of pressure field,there will be deviation between the actual explosion center and the ideal explosion center,which makes the existing shock wave test system unable to accurately evaluate the damage power of weapons and ammunition in the operational assessment stage.Aiming at the above problems,the design of high-speed and large dynamic wireless detection node of shock wave overpressure field based on Zynq is carried out.Firstly,the propagation law of air shock wave is studied,the relevant technical indexes of detection nodes are calculated and the type selection is completed;Secondly,taking zynq-7000 series SOC as the core,the hardware circuits such as array ICP sensor conditioning module,multi-channel high-speed adc-ad9259 data acquisition module and high-speed storage and transmission module are designed;Thirdly,the high-speed sequential logic circuits of PL（programmable logic）such as high-speed ADC interface and adaptive on-chip filter,as well as the embedded software programs of PS（arm processing system）such as high-speed data storage and Gigabit Ethernet transmission of Axi stream protocol are designed;Finally,experimental verification is carried out.The test results show that the large dynamic high-speed shock wave overpressure test system proposed in this paper can effectively obtain the shock wave overpressure signal,increase the dynamic range of the sensor from 100 d B to 146 d B,increase the system sampling rate from 1MSps to 10 MSps,and has on-chip hardware filtering.The data throughput of the on-chip data link has reached 640 Mbps.The system will provide strong technical support for improving China’s weapon equipment test capability.