Triaxial quartz flexible accelerometer assembly and measuring method thereof

Abstract

The invention discloses a three-axis quartz flexible accelerometer assembly, which comprises a measuring part and a data conversion part. The measuring part comprises an installation platform and three quartz flexible accelerometers; the installation platform is in a triangular pyramid shape, the three quartz flexible accelerometers are correspondingly and fixedly arranged on the three side facesof the installation platform respectively, and the bottom face of the installation platform is horizontally arranged; axes formed by the three quartz flexible accelerometers are perpendicular to one another; and included angles between the axes of the three quartz flexible accelerometers along the horizontal plane are equally divided. The acceleration measuring method comprises the following steps: 1, respectively defining sensitive axes of three quartz flexible accelerometers as U, V and W coordinate axes, and measuring to obtain acceleration under a UVW coordinate system; and 2, converting the acceleration in the UVW coordinate system into the acceleration in the XYZ coordinate system through a data conversion component, and outputting acceleration digital signals in X, Y and Z axial directions in the XYZ coordinate system. The structure is simple, and the quartz flexible accelerometer does not need to be specially designed.

Description

technical field [0001] The invention relates to the field of inertial measurement, in particular to a three-axis quartz flexible accelerometer assembly and a measurement method thereof. Background technique [0002] The Inertial Measurement Unit (IMU) measures the three axial angular velocities and accelerations of the carrier in the inertial reference system, and obtains the speed, yaw angle and other parameters of the carrier in the navigation coordinate system by integrating the time. Position information is the core information source of the inertial navigation system. In addition, inertial measurement units have also been widely used in various fields of national defense and people's livelihood, such as precise guidance of long-range weapons, satellite attitude control, petroleum geological exploration, and vibration measurement of railway track inspection vehicles, with extremely high military and social benefits. [0003] As an important instrument of the IMU, the pe...

AI Technical Summary

Problems solved by technology

This continuous external stress will accelerate the service life of the aging quartz flexible accelerometer, and amplify the measurement error caused by the process error of the three-axis quartz flexible accelerometer. Therefore, in some precision measurement fields, it is necessary to separately adjust the z-axis Accelerometers are specially designed

In addition, when the inertial navigation system uses the acceleration components of the three axes of XYZ, it needs to eliminate the influence of real-time gravitational acceleration in advance, and the gravitational acceleration will change with the ground height, latitude and the distribution of nearby mineral deposits, etc., thus improving the inertial navigation. system complexity

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