Patent ID: 11867540
Assignee: GUANGDONG BRILLINNOVA TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The Brillouin optical time domain reflectometer with an ultra-high spatial resolution based on bipolar differential phase encoding according to claim 1, wherein the result measurement module comprises:
a first data collector configured to receive the Stokes signal and convert the Stokes signal into a first digital signal through analog-to-digital conversion;
a first differential demodulator configured to perform differential demodulation on the first digital signal;
a first correlator configured to perform a correlation operation on a signal, output by the first differential demodulator, with the original encoding sequence;
a first superposition averager configured to perform superposition and averaging on a correlation operation result output by the first correlator;
a first measurement unit configured to calculate the first instantaneous frequency based on a superposition and averaging result output by the first superposition averager;
a second data collector configured to receive the anti-Stokes signal and convert the anti-Stokes signal into a second digital signal through analog-to-digital conversion;
a second differential demodulator configured to perform differential demodulation on the second digital signal;
a second correlator configured to perform a correlation operation on a signal output by the second differential demodulator with the original encoding sequence;
a second superposition averager configured to perform superposition and averaging on a correlation operation result output by the second correlator;
a second measurement unit configured to calculate the second instantaneous frequency based on a superposition and averaging result output by the second superposition averager; and
a third measurement unit configured to calculate the final measurement result based on the first instantaneous frequency and the second instantaneous frequency.