A method for off-line high-speed data acquisition of fiber optic gyroscope

Abstract

The invention discloses an offline high-speed fiber-optic gyroscope data acquisition method including steps of initializing an SD (secure digital memory card) through an FPGA (field programmable gate array) chip to enable the SD card to go into an SPI (serial peripheral interface) operating mode and activating SPI communication bus after completing the initialization, reading data in specified address of the SD and configuring transmit frame formats, write frame speed and timers for data acquisition according to the data in the address, creating a data buffer cache of 2048 bytes in the FPGA chip, and controlling the SD by the FGPA chip through the SPI communication bus to perform writing and reading of fiber-optic gyroscope data so as to complete the whole data acquisition process. Offline high-speed fiber-optic gyroscope data acquisition can be realized by the method, limitations of online data acquisition methods to transmission speed of fiber-optic gyroscope test data are broken through, and the transmission speed can be 2.5MB / s. In addition, the method has good adaptability to environments and effectively improves reliability in fiber-optic gyroscope test data acquisition.

Description

technical field [0001] The invention relates to a data collection method, in particular to an off-line high-speed data collection method for an optical fiber gyroscope. Background technique [0002] SD card (Secure Digital Memory Card) is a memory card based on semiconductor flash memory technology. It was jointly developed by Panasonic, Toshiba and Sandisk in 1999. At present, people's demand for high-speed collection and storage of large amounts of data is getting higher and higher. As a new generation of data storage device, SD card has the characteristics of small size, high capacity, fast transmission rate, low energy consumption and high security. It meets the specific needs of the market and is widely used in electronic equipment and industrial control fields. middle. The working temperature of the SD card memory is minus 40 degrees Celsius to 85 degrees Celsius, and can be used in harsh environments. In the existing real-time data acquisition system, when operatin...

AI Technical Summary

Problems solved by technology

The existing fiber optic gyroscope data acquisition system relies on cables, and there are obvious defects in the test: 1. The data transmission speed is slow

Most of the current optical fiber gyroscope test data transmission adopts serial communication protocol, and the computer is used to receive data outside the environmental control equipment (such as incubator, turntable). The speed is not high due to reasons such as no buffer area in the communication link and non-hardware implementation of the data processing module.

2. Poor data transmission reliability

In the fiber optic gyroscope test, the internal environment of the environmental control equipment needs to be strictly isolated from the external environment. Data transmission from the internal environment to the external environment passes through data conversion devices (such as metal slip rings, etc.). The actual data link is too long, resulting in poor reliability of the communication process and easy Interferenced by the environment; the reliability test of the fiber optic gyroscope requires the computer used to receive data in the external environment to work for a long time, and the reliability is insufficient

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