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Method for shortening low-temperature starting time of optical fiber gyroscope and circuit system

A fiber optic gyroscope and start-up time technology, which is applied to Sagnac effect gyroscopes, gyroscopes/steering sensing devices, instruments, etc. Shorten the time to enter the sampling range, low optical power, and quick start-up effect

Inactive Publication Date: 2020-04-10
XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problem that the existing fiber optic gyroscope has low temperature control efficiency and cannot meet the requirements of fast startup, the present invention provides a method and circuit system for shortening the low temperature startup time of the fiber optic gyroscope

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  • Method for shortening low-temperature starting time of optical fiber gyroscope and circuit system
  • Method for shortening low-temperature starting time of optical fiber gyroscope and circuit system
  • Method for shortening low-temperature starting time of optical fiber gyroscope and circuit system

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Embodiment Construction

[0037] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as figure 1 As shown, a method for shortening the low-temperature start-up time of the fiber optic gyroscope includes the following steps:

[0039] 1) The voltage reference part provides DC voltage input, which is used as the voltage comparison reference of the voltage comparison amplifier unit of the constant current source circuit;

[0040] 2) The constant current source circuit uses voltage comparison amplification and negative feedback to ensure that the voltage difference across the sampling resistor is constant, and at the same time through the RC delay network circuit, the current of the constant current source circuit increases slowly after power-on;

[0041] Among them, the delay time range of the RC delay network is 2 to 3s; the sampling resistor is a fixed resistor;

[0042] 3) The sampling resi...

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Abstract

The invention provides a method for shortening low-temperature starting time of an optical fiber gyroscope and a circuit system, and solves the problems that an existing optical fiber gyroscope is lowin temperature control efficiency and cannot meet the quick starting requirement. The method comprises the steps that: 1) a voltage reference part provides DC voltage input as a voltage comparison reference of a voltage comparison amplification unit of a constant current source circuit; 2) the constant current source circuit adopts a voltage comparison amplification and negative feedback mode toensure that a voltage difference between two ends of a sampling resistor is constant, and meanwhile, a current of the constant current source circuit is slowly increased after the constant current source circuit is powered on by means of an RC delay network circuit; 3) and the sampling resistor performs constant-current output in a current sampling mode, and provides a constant operating current for a light source of the optical fiber gyroscope.

Description

technical field [0001] The invention belongs to the field of fiber optic gyroscopes, and in particular relates to a method and a circuit system for shortening the low-temperature start-up time of fiber optic gyroscopes. Background technique [0002] Fiber optic gyroscopes have the advantages of shock resistance, high sensitivity, long life, large dynamic range, and short start-up time, and have been widely used in missile seeker systems. In the fiber optic gyroscope digital closed-loop system, the Sagnac phase shift is proportional to the input angular rate. The interfering optical signal of the gyroscope is converted into an electrical signal through the PIN-FET. The output signal of the PIN-FET is processed by the sampling circuit and then sent to the digital signal processing unit for resolution. After demodulation, the angular velocity data is output. [0003] When the gyro is working normally, the input signal of the A / D chip has a range. Under this input condition, th...

Claims

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Application Information

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IPC IPC(8): G01C19/72
CPCG01C19/721
Inventor 徐瑞峰赵春兰丁婵李云娇师梦艳潘子军任宾马小霞
Owner XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST