Multi-axis turntable perpendicularity error detection method based on single-axis laser gyro goniometer
A laser gyroscope and multi-axis turntable technology, applied in Sagnac effect gyroscopes, instruments, measuring devices, etc., can solve the problems of large size, difficult implementation, and verticality error of laser gyroscope strapdown inertial navigation. Wide range of detection applications, dynamic detection and simple detection device
Pending Publication Date: 2022-01-07
NAT INST OF METROLOGY CHINA
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Benefits of technology
This invention relates to an apparatus that measures angles accurately without requiring complicated equipment or calibration steps for accurate measurements. It achieves this by measuring rotational motion rather than just its linear movement through multiple sensors. Its technical effect lies on improved precision measurement capabilities while reducing complexity and cost compared to existing methods like optical interferometry systems.
Problems solved by technology
Technological Problem: Current Multi-Axis Turbomachines require precise alignment when attaching sensors or guides onto their mounts. These machines may experience changes caused by temperature fluctuation over time without being able to detect any issues such as aligning themselves correctly. Additionally, current methods involve multiple steps involving complex operations like assembly, testing, and commissioning, making them expensive and prone to introducing defective parts into production lines.
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[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and actual measurement data.
[0060] Such as figure 1As shown, it is a schematic structural diagram of a detection device of a multi-axis turntable verticality error detection method based on a single-axis laser gyro goniometer in the present invention. The detection device includes a single-axis laser gyro goniometer 1, a fixture 3, multiple Axis turntable 2, multi-axis turntable attitude data acquisition system (not shown in the figure), single-axis laser gyro goniometer angle data acquisition system (not shown in the figure) and data processing computer (not shown in the figure), fixed The single-axis laser gyro goniometer 1 installed in the fixture 3 is installed at the center of the worktable of the multi-axis turntable 2 to reduce the increase of the axis inclination angle rotation error caused by the change of the eccentric load. For the single-axis laser gyro ...
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The invention discloses a multi-axis turntable perpendicularity error detection method based on a single-axis laser gyro goniometer, wherein the method comprises the steps: firstly, clamping the laser gyro goniometer fixed in a fixture on a worktable surface of a multi-degree-of-freedom turntable; electrifying and preheating the laser gyroscope goniometer, and carrying out scale coefficient calibration and offset calibration on the laser gyroscope goniometer by utilizing an azimuth axis; secondly, respectively establishing an azimuth axis projection coordinate system and a pitch axis projection coordinate system; then, enabling the azimuth axis to be located at different angular positions distributed at equal intervals, rotating the pitch axis by 360 degrees anticlockwise and clockwise at a constant angular speed, and recording the number of output pulses; and finally, solving the axis perpendicularity error of the multi-axis turntable and the misalignment angle of the laser gyro goniometer at the same time. The method is suitable for on-line metering of the multi-axis turntable, is convenient to install, is wide in application range, is high in detection precision, can achieve the detection of multiple parameters, such as the angle, the angular velocity and the perpendicularity, and is also easy for an angle measurement system reading head of the multi-axis turntable to synchronously achieve dynamic measurement.
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