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Proceedings Paper

Research on high precision timing system based on FPGA non scanning imaging laser radar
Author(s): Yanbo Fu; Shaokun Han; Liang Wang; Yayun Ma
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Paper Abstract

The article introduced the system structure and imaging principle of no three-dimensional imaging laser radar. This paper used the XC7K325T XILINX chip of KINTEX 7 series and used temporal interpolation method to measure distance. Rough side used PLL multiplier 400MHZ, which reached 2.5ns time accuracy. This method used a thin chip delay chains carry resources to reach 50ps accuracy and greatly improved the accuracy of the timing of imaging.

Application technique used a delay line in APD array imaging system, such that each channel distance accuracy greatly improved. Echo signal by photoelectric conversion is completed by APD array detector, and designed by the impedance amplifier and other analog signal processing circuit. FPGA signal processing circuit is to complete the back-end processing, which is the timing function. FPGA array timer clock is to achieve coarse portion through timing, and delay line technique for measuring the length of time a non-integer multiple of the period of the laser pulse emission and the moment of reception, each stage of the delay units delay accuracy of sub ns magnitude, so as to achieve precision measuring part timers. With the above device was close imaging experiments, obtaining the 5 × 5 pixel imaging test results, presented to further improve system accuracy improved method.

Paper Details

Date Published: 5 August 2015
PDF: 9 pages
Proc. SPIE 9618, 2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 96180A (5 August 2015); doi: 10.1117/12.2193104
Show Author Affiliations
Yanbo Fu, Beijing Institute of Technology (China)
Shaokun Han, Beijing Institute of Technology (China)
Liang Wang, Beijing Institute of Technology (China)
Yayun Ma, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 9618:
2015 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Xiaodi Tan; Kimio Tatsuno, Editor(s)

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