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

A technology of high-speed data acquisition and fiber optic gyroscope, which is applied in Sagnac effect gyroscope, memory address/allocation/relocation, etc. It can solve the problems of poor data transmission reliability, low speed, and no buffer area in communication links. , to achieve the effect of improving the reliability of test data collection and good environmental adaptability

CN103324583BInactive Publication Date: 2016-03-02ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-03-02
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0033] The present invention will be further described below in conjunction with drawings and embodiments.

[0034] Invention principle of the present invention:

[0035] Fiber optic gyroscope is a kind of fiber optic sensor sensitive to angular rate. The fiber optic gyro has the advantages of small size, light weight, wide range of accuracy, and no moving parts. It is a new type of all-solid-state inertial instrument. Due to the importance of the fiber optic gyroscope in the application fields of aviation, aerospace, navigation and weapons, it has been closely watched by countries all over the world, especially the military, and has developed rapidly. It has become the mainstream in the field of inertial measurement and guidance in the 21st century. One of the gauges. Medium and high-precision fiber optic gyroscopes integrate precision sensor devices such as angular rate, temperature, and air pressure, and the output data has the characteristics of high precision and large ...