design and simulation of a mems high g inertial impact sensor
Download
Skip this Video
Download Presentation
Design and Simulation of a MEMS High G Inertial Impact Sensor

Loading in 2 Seconds...

play fullscreen
1 / 21

Design and Simulation of a MEMS High G Inertial Impact Sensor - PowerPoint PPT Presentation


  • 146 Views
  • Uploaded on

Design and Simulation of a MEMS High G Inertial Impact Sensor. Y.P. Wang1, R.Q. Hsu1, C.W. Wu2 1Department of Mechanical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, 300 Hsinchu, Taiwan Phone: +886-3-5712121 Ext.31934, Email: [email protected]

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Design and Simulation of a MEMS High G Inertial Impact Sensor' - ellis


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
design and simulation of a mems high g inertial impact sensor

Design and Simulation of a MEMSHigh G Inertial Impact Sensor

Y.P. Wang1, R.Q. Hsu1, C.W. Wu2

1Department of Mechanical Engineering, National Chiao Tung University,

1001 Ta-Hsueh Road, 300 Hsinchu, Taiwan

Phone: +886-3-5712121 Ext.31934, Email: [email protected]

2Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University

2, Pei-Ning Road, Keelung, Taiwan.

Speaker: Jing-Wen Shih

outline
Outline
  • Introduction
  • The major goal of Inertial impact sensor
  • The micro impact sensor proposed in this study
  • Simulation
  • Conclusion
  • Reference
introduction
Introduction
  • Inertial sensors have been extensively utilized in science like inertial navigation systems and airbag triggers .
  • For high G(>300G) applications. Reaction times for conventional mechanical type impact sensors are not fast enough.
the major goal of inertial impact sensor
The major goal of inertial impact sensor
  • Designing an impact sensor that has a faster reaction time than conventional sensors and a mechanism that is sufficiently robust to survive the impact when a vehicle collides with a hard target is the major goal of this study.
conventional inertial impact sensor
Conventional inertial impact sensor
  • (a)cantilever beam type
  • (b)axial spring type
mds system trigger
MDS System trigger
  • MDS: Mass- Damper- Spring Dynamic
to evaluate system reaction time 4 different arrangements of spring and proof mass were tested
To evaluate system reaction time, 4 different arrangements of spring and proof mass were tested.
simulation
Simulation
  • Displacement versus applied forces for each sensor
slide14
Proof mass increases from 0.62 to 1.0, and thespring constant remains unchanged, the reaction time isdecreased.
slide16
Reducing the spring constant, and retaining the proof mass, the reaction time decreased and the trigger G value decreased for sensors
the plastic strain of the type 1 sensor in 21000g
The plastic strain of the type 1 sensor in 21000G
  • With no significant interference in the x and z axis; consequently,sensor stability is very good.
conclusion
Conclusion
  • This proposed impact sensor is intended for use at 8,000–21,000G. Four different designs were analyzed.
  • The impact sensors were sufficiently robust to survive the impact of at least 21,000G, four times higher than that of conventional inertial

impact sensors.

references
References
  • F. Goodeough, Airbag boom when IC accelerometer sees 50 G,Electronics Design, pp.45-56, August. 8, 1991.
  • Tadao Matsunaga, Masayoshi Esashi, Acceleration switch with extended holding time using squeeze film effect for side airbag systems, Sensors and Actuators A:physical, vol. 100, Issue 1, pp.10-17 , August. 2002.
  • Military Standard, Mechanical Shock Test, MIL-STD-883E Method 2002.4, US Dept. of Defense, 2004.
  • Donald R. Ask eland, The science and engineering of materials, 1st edn,Taipei, Kai Fa, 1985, ch. 6, pp. 126-127.
  • Trimmer, W.S.N, Microrobots and Micromechanical Systems, Sensors and Actuators vol.19 no.3, pp. 267-287, 1989.
  • M. Elwenspoek, R. Wiegerink, Mechanical Microsensors, Germany,Springer, 2001.
  • Tai-Ran Hsu, MEMS & Microsystems Design and Manufacture,international edition 2002, Singapore, McGraw-Hill, pp. 157-159.
ad