Laser gyro POS (Point of Sales) data acquisition and pre-processing system

Abstract

The invention relates to a laser gyro POS data acquisition and pre-processing system which comprises a Field Programmable Gate Array (FPGA) data acquisition module and a Digital Signal Processor (DSP) data pre-processing module. The FPGA data acquisition module realizes the acquisition of laser gyro signal, accelerometer signal and temperature signal and acquires a clock by using the synchronous FPGA data of GPS second pulse. The DSP data pre-processing module reads the laser gyro data, the accelerometer data and the temperature data in the FPGA to pre-process the data and sends the pre-processing result to a navigation computer. The system realizes the integrated design of high-frequency and high-precision laser gyro POS data acquisition and pre-processing system of FPGA / DSP framework; therefore, the power consumption, the volume and the weight of the system are reduced so that the system performance can be greatly improved.

Description

technical field [0001] The invention relates to a laser gyroscope POS data acquisition and preprocessing system, which belongs to the technical field of inertia, and can be applied to POS (Position and Orientation System, position and attitude measurement system), and can also be applied to inertial navigation, inertial / GPS (Global Position System , Global Positioning System) data acquisition and preprocessing of integrated navigation system. Background technique [0002] For high-resolution aerial remote sensing systems, in addition to high-resolution remote sensing payloads, the main factor restricting the imaging resolution of remote sensing systems is high-precision POS. High-precision POS provides high-precision position and attitude references for remote sensing loads, and provides precise orientation for inertial stabilization platforms. Whether for high-resolution optical cameras or airborne three-dimensional imaging lidars, high-precision POS is the key to improvin...

AI Technical Summary

Problems solved by technology

Developed a flexible gyro inertial measurement system for the second-generation POS principle prototype; developed a fiber optic gyro inertial measurement system for a high-precision POS principle prototype, with an attitude accuracy of up to 0.02°, providing technical support for the development of high-precision POS. The preprocessing system adopts a combination of single FPGA and peripheral chips to realize data acquisition, but FPGA is a fixed-point processor and cannot perform high-precision data filtering, so the single FPGA data acquisition solution cannot meet the needs of the laser gyro POS system

The laser gyro inertial navigation system produced by the National University of Defense Technology uses PC-104 as the main processor for its data acquisition and preprocessing system, but the PC-104 is large in size and consumes a large Precision Development Needs

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