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Flexible electronics based on mechanical loading bending fatigue testing machine

Author: CaoHuWen
Tutor: YangPing
School: University of Electronic Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Flexible electronics Fatigue Stepper motor Screw mechanism Virtual instrument
CLC: TN406
Type: Master's thesis
Year: 2011
Downloads: 82
Quote: 0
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Abstract


Trends in the miniaturization of ultra-thin, folded , etc. of the mobile electronic device , the flexible printed circuit board is playing an increasingly important role . Fatigue failure occurs when the flexible printed circuit board electronic equipment will also damage occurred , gave rise to higher economic losses . This topic UESTC-NOKIA - basis for international cooperation in research projects , the main purpose is the research and development of test instruments for the bending fatigue life test of the flexible circuit board . Bending fatigue testing machine structure based on the analysis of the IPC and three-point bending test method and comparison tablet , to determine the overall technical requirements of the testing machine and technology programs . Design tasks into the mechanical design , circuit design and software design in three aspects . Designed based on stepper motor - driven screw slider mechanism as the drive 's mechanical structure of the testing machine to avoid the traditional mechanical transmission loading mode , loaded itinerary fixed the shortcomings can accurately control the loading speed , loaded stroke and load mode . Reserved interface in the loading structure and the support structure at the same time in order to achieve the multiplexing of the testing machine . ATmega16 -based controller , monitoring and control system design , and the AVR the main processor module , stepper motor driver module , photoelectric counter module , the sample resistance detection module , human-computer interaction module , serial communication module circuit design . Stepper motor works , design -driven algorithm to complete the driver software in MAtlab simulation analysis . PC control interface on a PC using Labview using serial communication functions , set the operating parameters of the testing machine on the host computer , and the real-time feedback . Use the curve intuitive to show the relationship of the resistance and the loading times . In resistance change exceeds the threshold value , the stop signal is sent to the microcontroller to achieve unattended automatic shutdown feature . Commissioning work to determine the mechanical structure and function of size to meet the requirements , the motor running smooth function of each part is working properly , the host computer and the next crew communication smooth . This flexible electronic bending fatigue testing machine to meet the design requirements , the successful completion of the expected target .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Microelectronics, integrated circuit (IC) > General issues > Reliability and routine testing
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