Impact test system based on integral Hopkinson rod PVDF sensor

A Hopkinson rod and impact test technology, which is applied in the direction of instruments, measuring devices, and measuring fluid pressure, etc., can solve the problems of uneven superimposition of pulse signals, short calibration range, etc., and achieve simple calculation, large calibration range, and simple operation Effect

Inactive Publication Date: 2019-01-29
NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that each impact pulse of the separate Hopkinson rod can only calibrate one PVDF sensor, and if multiple sensors are calibrated at the same time, there will be uneven superposition of pulse signals and the problem of short calibration range. Shock Test System for Integral Hopkinson Rod PVDF Sensor

Method used

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  • Impact test system based on integral Hopkinson rod PVDF sensor
  • Impact test system based on integral Hopkinson rod PVDF sensor
  • Impact test system based on integral Hopkinson rod PVDF sensor

Examples

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine Figure 1 to Figure 5 Illustrate, a kind of impact test system based on integral type Hopkinson bar PVDF sensor of this embodiment is made up of integral type Hopkinson bar 1, PVDF sensor test assembly 2, signal acquisition system 3; Described integral type Hopkinson bar 1 Integral structure; the PVDF sensor test assembly 2 is fixed on the sample to be tested of the integral Hopkinson bar 1 by threads; It is composed of several PVDF sensors 24, the fixture upper cover 21 and the fixture base 22 are in a concave-convex tight fit and fixed by the fixture fixing screw 23, and the several PVDF sensors 24 are clamped between the fixture upper cover 21 and the fixture base 22 Between; described signal acquisition system 3 is made up of oscilloscope and charge amplifier; Described single PVDF sensor 24 is externally connected with testing wire, and one end of described testing wire is connected on the positive and negative pole of PVDF...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that: the contact surfaces of the PVDF sensor 24 , the fixture upper cover 21 and the fixture base 22 are coated with Vaseline. Others are the same as the first embodiment.

[0020] This embodiment can enhance shock pulse signal transmission.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the standard mechanical value measured by the standard sensor in the integral Hopkinson rod 1 is the acceleration. Others are the same as those in Embodiment 1 or 2.

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Abstract

The present invention discloses an impact test system based on an integral Hopkinson rod PVDF sensor. The invention belongs to the technical field of PVDF sensor test calibration, specifically, relates to an impact test system based on an integral Hopkinson rod PVDF sensor. The present invention is to solve the problem that existing split Hopkinson rods can only calibrate one PVDF sensor per shockpulse, for example, multi-sensor simultaneous calibration will result in uneven distribution of shock pulse signal and short calibration range. An impact test system based on an integral Hopkinson rod PVDF sensor consists of an integral Hopkinson rod, a PVDF sensor test assembly, and a signal acquisition system. The integral Hopkinson rod is a one-piece structure. The PVDF sensor test assembly isthreaded to the sample to be tested of the integral Hopkinson rod. The impact test system based on integral Hopkinson rod PVDF sensor has simple structure and can simultaneously calibrate multiple batches of PVDF samples.

Description

technical field [0001] The invention belongs to the technical field of PVDF sensor testing and calibration, and in particular relates to an impact testing system based on an integral Hopkinson bar PVDF sensor. Background technique [0002] PVDF (polydenetetrafluoroethylene film material) is a new type of polymer piezoelectric film material with good piezoelectric properties. The PVDF sensor made of PVDF film has good flexibility, wide frequency response, small noise signal, and low impedance. It has the characteristics of good matching and is widely used in explosive mechanics and impact mechanics. Because it is difficult to monitor the impact force with ordinary piezoelectric sensors for testing explosion impact pressure, the PVDF sensor can monitor the impact force up to 20Gpa, and at the same time, the test range is greater than 0.3Gpa and has good linearity, so it is widely used in pressure monitoring of explosion impact Environment. [0003] There are few studies on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L27/00
CPCG01L27/00
Inventor 孙权覃双张旭陈宝成刘兴宇徐兴烨刘志远姜晓龙
Owner NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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