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Nonvolatile digital potentiometer trimmed ring laser gyroscope
Nonvolatile digital potentiometer trimmed ring laser gyroscope
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机译：非易失性数字电位器微调环形激光陀螺仪
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摘要
A ring laser gyroscope (RLG) is configured with control circuits that are capable of automatic calibration. The RLG generates two laser beams in opposite directions around a closed loop path to determine angular rotation of the RLG. The laser beams propagate in a laser gain medium, and a laser intensity monitor circuit is operatively connected to the laser gain medium to monitor an intensity of the laser beams propagating in the laser gain medium. A dithering circuit is provided, including a dithering motor for mechanically oscillating the RLG at a controlled frequency and dither angle. A gain circuit is operatively connected to a detector array of the RLG to amplify a detector signal therefrom. According to the present invention, an automatically variable resistance is provided to calibrate the laser intensity monitor circuit of the RLG, to control the dither angle at which the dithering motor mechanically oscillates the RLG, and/or to calibrate the gain circuit of the RLG. In one embodiment, the automatically variable resistance(s) is provided by one or more digital potentiometers connected to the relevant control circuitry.
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