Development of Acoustic Emission High-Speed Data Acquisition System

2012 ◽  
Vol 433-440 ◽  
pp. 5666-5671 ◽  
Author(s):  
Ting You ◽  
Pei Jiang Li ◽  
Guan Jun Tong ◽  
Jian Wei Shen
Keyword(s):  
Acoustic Emission ◽  
Real Time ◽  
Acoustic Emission Signal ◽  
High Speed ◽  
Transmission Rate ◽  
Acquisition System ◽  
High Frequency Signal ◽  
Emission Signal ◽  
High Speed Data Acquisition ◽  
High Speed Data

Acoustic emission is generally high-frequency signal with the characteristics of broadband and burstiness, so it is very difficult to acquire acoustic emission signal in real time as well as rapidly, In this paper, an USB based acquisition system for acoustic emission signal is designed, which adopts CPLD as controller and uses two high-speed A/D converters to achieve synchronous acquisition of two-channel acoustic emission signals, The system first puts collected data into a FIFO and then transfers data to host through USB using CY7C68013, The sampling frequency of the system is up to 10MHz and the transmission rate of USB is 40M/S, Hard body impact test and lead-breaking test indicate that the system can achieve real-time acquisition of acoustic emission signal well,

Software Design Based on PLD High-Speed Data Acquisition System

2013 ◽  
Vol 798-799 ◽  
pp. 647-650
Author(s):  
Geng Zhang ◽  
Hao Xu
Keyword(s):  
Data Acquisition ◽  
Real Time ◽  
Software Design ◽  
High Speed ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Data Sampling ◽  
Logic Function ◽  
High Speed Data Acquisition ◽  
High Speed Data

Data collection in the important position of modern industrial production and scientific research is increasingly outstanding, as well as the real-time collection, real-time transmission and real-time processing of high speed data acquisition requirements are constantly improve. In addition, for different occasions, the data acquisition system of data sampling parameters are different. PLD as a universal integrated circuit, its logic function according to user's programming on the device, this paper introduces the high-speed data acquisition system based on PLD, mainly expounds the software design of the system, this paper introduces a simple PLD system, using FPGA as the data acquisition chip, the main measure the infrared remote control code acquisition, based on EDA technology to design a core, using DMA access to data, to achieve high-speed system requirements.

Real-time distortion monitoring during fused deposition modeling via acoustic emission

2019 ◽  
Vol 19 (2) ◽  
pp. 412-423 ◽  
Author(s):  
Feng Li ◽  
Zhonghua Yu ◽  
Zhensheng Yang ◽  
Xuanwei Shen
Keyword(s):  
Acoustic Emission ◽  
Real Time ◽  
Acoustic Emission Signal ◽  
Fused Deposition Modeling ◽  
Emission Signal ◽  
Fused Deposition ◽  
Modeling Process ◽  
Deposition Modeling ◽  
Part Distortion ◽  
Quality Diagnosis

Fused deposition modeling is a popular technique for three-dimensional prototyping since it is cost-effective, convenient to operate, and environment-friendly. However, the low quality of its printed products jeopardizes its future development. Distortion, also known as warping deformation, which is caused by many factors such as inappropriate process parameters and process drifts, is one of the most common defects in the fused deposition modeling process. Rapid detection of such part distortion during the printing process is beneficial for improving the production efficiency and saving materials. In this article, a real-time part distortion monitoring method based on acoustic emission is presented. Our work is to identify distortion defects and understand the condition of the distortion area through sensing and digital signal processing techniques. In our experiments, both the acoustic emission hits and original signals were acquired during the fused deposition modeling process. Then, the acoustic emission hits were analyzed. Ensemble empirical mode decomposition was utilized to eliminate noise and extract features from the original acoustic emission signal to further analyze the acoustic emission signal in the case of part distortion. Furthermore, the root mean square of the reconstructed signals was calculated, and the prediction results are strongly correlated with the ground truth printing states. This work provides a promising method for the quality diagnosis of printing parts.

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