Oki Electric Industry has been granted a patent for an optical fiber measurement apparatus that enhances the measurement range of strain and temperature. The system utilizes a light source, splitting and delay units, and a Brillouin frequency shift acquisition unit to synthesize and analyze measurement signals effectively. GlobalData’s report on Oki Electric Industry gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Oki Electric Industry, Virtual banking assistant was a key innovation area identified from patents. Oki Electric Industry's grant share as of June 2024 was 37%. Grant share is based on the ratio of number of grants to total number of patents.
Optical fiber strain and temperature measurement apparatus
The patent US12044582B2 describes an advanced optical fiber strain and temperature measurement apparatus and method. The apparatus includes a light source unit that generates probe light, which is then split into two branches to analyze Brillouin backscattered light from an optical fiber. Key components of the system include an optical frequency shifter, a delay unit, a multiplexer, and a coherent detection unit that performs heterodyne detection to produce a measurement signal. The apparatus also features a Brillouin frequency shift acquisition unit that employs homodyne detection to determine the phase difference and frequency shift based on the intensity of the measurement signal. This unit consists of multiple calculation units and a synthesizer that processes the signals to derive a Brillouin frequency shift waveform, while a finiteness elimination unit calculates a phase rotation number to adjust the synthesized waveform when the optical fiber is stable.
The method outlined in the patent mirrors the apparatus's functionality, detailing steps for generating probe light, splitting the backscattered light, and performing frequency shifts and delays. It emphasizes the importance of synthesizing the Brillouin frequency shift waveform based on specific conditions related to the frequency shift offset. The method also includes steps for calculating intensity changes and phase rotation numbers, which are crucial for accurate measurements. The claims highlight the system's ability to provide precise strain and temperature measurements in optical fibers, making it a significant advancement in the field of optical sensing technology.
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