Abstract
Based on pseudo-random sampling a high-precision measurement method of time-interval for pulsed laser ranging is presented for the first time. In the method, time-intervals of laser pulses are controlled by a chirp signal generated using a Voltage-Controlled Crystal Oscillator. The time-intervals are unequal pseudo-random sequences. Pulse laser signals reflected from the object become sampling signals after they pass through a time discriminating circuit. Characteristics of measured signals are represented by the mapping of sampling time points on a referenced sinusoid signal. Then high-precision measurement of time-intervals can be implemented using a phase estimation algorithm. This method is simple in theory and easy to realize. In experiments using 15MHz reference clock, it is achieved that the measurement precision of time is 16ps.
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© 2011 Springer-Verlag Berlin Heidelberg
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Huang, M., Huang, J., Feng, Y. (2011). High-Precision Measurement Method of Time-Interval Based on Pseudo-Random Sampling. In: Lee, G. (eds) Advances in Automation and Robotics, Vol.1. Lecture Notes in Electrical Engineering, vol 122. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25553-3_36
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DOI: https://doi.org/10.1007/978-3-642-25553-3_36
Publisher Name: Springer, Berlin, Heidelberg
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