The research of precision timing measurement in application of TDC_GP2 in laser ranging

Bo Song; Wei Zheng

doi:10.1117/12.2034752

19 September 2013 The research of precision timing measurement in application of TDC_GP2 in laser ranging

Bo Song, Wei Zheng

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 890523 (2013) https://doi.org/10.1117/12.2034752
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

Laser ranging could measure the distance between laser range finder and detection target by calculate the flight time of laser. The laser of laser range finder adopt semiconductor pump laser of 1064nm, PerkinElmer C30659 APD was used in photoelectric detection circuit, STC89C52 MCU and the FPGA of XC3S400 were used as the core of control system. High precision time interval measurement is one of the most important techniques in laser ranging. In this paper, we adopt a high precision time interval measurement time to digital converter chip of ACAM corporation in Germany. TDC_GP2 is the next generation of Acam general-purpose TDCs, higher resolution and smaller package size make it ideal for cost sensitive industrial applications. We select the measurement range 2 of the TDC_GP2, and the maximum time resolution is 65ps. Digital TDCs use internal propagation delays of signals through gates to measure time intervals with very high precision. Through researching the working principle of TDC_GP2, hardware circuit diagram of TDC_GP2、measurement time diagram of TDC_GP2、the system software design of TDC_GP2, and applying in the different measuring distances and different time measurement temperatures, research shows that the precision of time measurement lies on the different measuring distances and different time measurement temperatures. In the end, we make some suggestions of improving the precision of time measurement.

Citation Download Citation

Bo Song and Wei Zheng "The research of precision timing measurement in application of TDC_GP2 in laser ranging", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 890523 (19 September 2013); https://doi.org/10.1117/12.2034752

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