Fibre-optic gyroscope 2 pi voltage parameter all-digital servo regulating device and method
A voltage parameter, fiber optic gyroscope technology, applied in measurement devices, Sagnac effect gyroscopes, gyroscopes/steering sensing devices, etc., can solve the problem of reduced adjustment accuracy, increased circuit board cost, and increased circuit board volume problem, to reduce the volume, reduce the generation and introduction of errors, and ensure the effect of output stability
Pending Publication Date: 2019-03-12
CHONGQING HUAYU ELECTRIC GRP
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But this not only increases the volume of the entire circuit board, but also increases the cost of the circuit board
At the same time, after adding components, it will not only cause troubles such as wiring, but also more troublesome production and processing, and will easily cause more error transmission, resulting in reduced adjustment accuracy
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[0024] Example: see figure 1 , a fiber optic gyroscope 2π parameter all-digital servo adjustment device, including a photodetector, a main circuit board and a phase modulator. The main circuit board includes an analog switch, an amplifying circuit, FPGA, a D / A converter and an output serial port; the photodetector, an analog switch, an amplifying circuit, an FPGA, a D / A converter and a phase modulator are connected in sequence, and the The above output serial port is connected with FPGA. This solution does not need to add a 2πD / A converter. Through digital operations, the 2π voltage parameters can be effectively adjusted, and after one component is reduced, the related peripheral circuits are correspondingly reduced, thereby reducing the generation and introduction of errors, thus enabling The adjustment accuracy of the whole device is higher. At the same time, after one component is reduced, the related peripheral circuits are correspondingly reduced, which is beneficial to...
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The invention discloses a fibre-optic gyroscope 2 pi voltage parameter all-digital servo regulating device and method. The regulating device comprises an optical detector, a main circuit board and a phase modulator, wherein the main circuit board comprises an analogue switch, an amplifying circuit, FPGA, a D / A converter and an output serial port. The regulating method comprises the following steps: 1) converting an acquired signal into a digital signal through an A / D converter, and performing matrixing to obtain a 2 pi voltage parameter; 2) judging whether the 2 pi voltage parameter is accurate or not by calculating whether a reset error is zero or not; 3) performing step-wave reset height regulation; and 4) repeating step 3) to accomplish elimination of the reset error. The fibre-optic gyroscope 2 pi voltage parameter all-digital servo regulating device disclosed by the invention adopts an all-digital calculation way, can effectively regulate the 2 pi voltage parameter, is higher in regulation precision, facilitates reducing circuit board volume at the same time, and reduces the cost.
Description
technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to an all-digital servo adjustment device and method for 2π voltage parameters of a fiber optic gyroscope. Background technique [0002] Closed-loop fiber optic gyroscopes based on digital staircase feedback have been widely used in fiber optic gyroscopes due to their advantages such as high precision, large dynamic range, and good nonlinearity. Due to the influence of temperature, there are still some changes in the zero bias and scale factor of the fiber optic gyroscope, and these two parameters are particularly important for the system. Among them, the change of the 2π voltage of the integrated optical modulator (Y waveguide) with the temperature is one of the important reasons for the drift of the two parameters of the fiber optic gyroscope. Therefore, the servo adjustment of the 2π voltage parameters in the circuit according to the change of the 2π voltage in th...
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Login to View More IPC IPC(8): G01C19/72
CPCG01C19/721
Inventor 李光辉
Owner CHONGQING HUAYU ELECTRIC GRP