Performance characteristics of EMP high speed testing machine: The electromagnetic pulse high-speed testing machine uses the electromagnetic pulse energy to load the sample instantaneously, and tests the stress and strain of the sample under high-speed loading. The utility model includes a power supply, a base, two support frames fixed on both sides of the base, a cross beam fixed on the top of the two support frames at both ends, a magnetic coil stretching device fixed between the cross beam and the base along the vertical direction, and a driving device arranged on the two support frames. The magnetic coil stretching device includes a fixed tube fixed on the driving device in the vertical direction, and a threading device The magnetic pull rod is arranged on the fixed tube, the upper clamp fixed on the lower end of the magnetic coil pull rod and the lower clamp fixed on the base corresponding to the upper clamp. The inner wall of the fixed tube is provided with a coil, and the driving device can fix the magnetic coil stretching device at a preset height. The power supply supplies power to the coil in the fixed tube, which can make the coil produce a magnetic field instantly and make the metal pull rod suffer The magnetic force moves up and down in the fixed tube, so that the upper clamp and the lower clamp can stretch the sample. Compared with the prior art, the magnetic force applied to the metal pull rod by generating a magnetic field enables the magnetic pull rod to generate a faster acceleration. By attaching strain gauge to the pull rod and the lower base, the stress and strain of the pull rod are collected, and the stress-strain characteristics of the sample are tested. Introduction to the function of hud-m120 ultra dynamic data acquisition system: The hud-m120 ultra dynamic data acquisition system is specially used for the test and analysis of high-speed EMP testing machine. The highest transient sampling rate of the system is 1MHz, each channel is independent of a / D analog-to-digital converter, and the external strain conditioner completes the stress-strain test and analysis of 1 / 4 bridge, half bridge and full bridge states. The system has the functions of real-time acquisition, real-time display, real-time storage and real-time analysis of the measured signal, automatic test control and data waveform analysis and processing. Hu-m120 ultra dynamic data acquisition system: 12 bits a / D resolution 10ksps-40msps sampling rate 4 parallel acquisition channels 8msa buffer memory per channel Rich trigger functions Driver support for WindowsXP windows7 Alt1000 ultra dynamic data acquisition system is the most advanced data acquisition product with the highest sampling rate of 40msps. It has the characteristics of high precision, low noise, low distortion and wide test signal range. Alt1000 ultra dynamic data acquisition system provides 8 analog signal input parallel acquisition and test channels. All channels are sampled and maintained at the same time, and each channel performs independent A / D conversion. The data acquisition and measurement reaches 12 bit a / D conversion resolution and the highest 40msps data sampling rate. Each channel of its high impedance differential input has an independent gain of 1-1600 times, which can be directly connected to most sensor voltage outputs. Alt1000 ultra dynamic data acquisition system has eight ranges of ± 16V, ± 8V, ± 4V, ± 2V, ± 1V, ± 500mv, ± 250Mv, ± 125mv. It has one system trigger line and system clock line. When multiple collectors are working at the same time, it can select the system trigger and system clock for the purpose of synchronizing the whole system trigger and sampling with the same clock to keep the system synchronized. Alt1000 ultra dynamic data acquisition system has the functions of software trigger, internal trigger, external trigger and positive and negative delay. The highest A / D conversion rate is 40msps. Press down 1, 2 and 5 to divide the frequency. Bnc coaxial cable (differential connector can be selected) is used for signal input. The maximum storage depth of sampling in each channel is 8msa, and the sampling length can be set at will by software. The system is equipped with system driver control program software, which runs on Windows XP / 7 operating platform. The control panel is completely virtual instrument soft panel, and the graphical interface is very friendly. Based on the data collected by the EMP high-speed testing machine, the software identifies and separates the stress wave, and calculates the corresponding parameters such as strain rate, stress, strain energy and high g value according to the experimental parameters. In addition, the software platform provides the display and editing functions of plane curve, and the original data and calculation data can be displayed and output through graphics and images.
