Fault Identification in Printed Circuit Board using Thermal Image
Abstract
The different defects in PCB (Printed Circuit Board) are hairline, pin- hole, wrong size hole, breakout, open circuit, mis- contact, spur, mission feature, etc, and it is essential to detect these defects effectively. The Conventional automatic test equipment (ATE) offers some limitations in testing the produced PCB which has been attached, inserted and soldered the electronic components. The no contact problem, rapid image acquisition, easy operation, and simple testing reconfiguration have the advantages of the thermal imaging diagnostic system. Therefore, this approach has been widely applied in the past decade to diagnose faults on PCB. To analyze the thermal image of PCB for faults detection proposed a novel vector quantization (VQ) based approach, which can reduce the memory size, for thermal image analysis of PCB diagnosis. Appling the proposed VQ- based approach, the gold thermal image is coded into a codebook and compared with the board under test (BUT) to identify the image blocks with faults, instead of the whole thermal image. This proposed method is demonstrated to be very effective in abnormal functional block identification for PCB based on thermal image
Keywords
Full Text:
PDFReferences
Shih-Yuan Huang, Chi-Wu Mao, and Kuo-Sheng Cheng, Senior Member,
IEEE ―A VQ-Based Approach to Thermal Image Analysis for Printed
Circuit Boards Diagnosis‖ IEEE Trans.on instrumentation and
measurement, VOL. 54, NO. 6, DEC. 2005.
Hugh Q. Cact and Weiping Li‖ A New Multilevel Codebook Searching
Algorithm for Vector Quantization‖ Department of Electrical Engineering
and Computer Science
Jun Xu, Jian liang Li, Yong Jiang ―Components Locating in PCB Fault
Diagnosis Based on Infrared Thermal Imaging ―2009 Second International
Conference on Information and Computing Science
Y. Linde, A. Buzo, and R. M. Gray, ―An algorithm for vector
quantizer design,‖ IEEE
Trans. Commun., vol. COM-28, pp. 85–94, Jan. 1980.
S.W. Ra and J. K. Kim, ―A fast mean-distance-ordered partial codebook
search algorithm for image vector quantization,‖ IEEE Trans. Circuits Syst.
II: Analog Digit. Signal Process., vol. 40, no. 9, pp. 576–579, Sep. 1993.
C. H. Lee and L. H. Chen, ―Fast closest codeword search algorithm for
vector quantization,‖ IEE Proc.—Vision, Image and Signal Process, vol.
, no. 3, pp. 143–148, Jun. 1994.
S. J. Baek, B. K. Jeon, and K.-M. Sung, ―A fast encoding algorithm for
vector quantization,‖ IEEE Signal Process. Lett., vol. 4, no. 12,pp.
–327, Dec. 1997.
Khalid Sayood, Introduction to Data Compression, Second edition, San
Francisco, CA: Morgan Kaufmann Publishers, 2000.
Refbacks
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.