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Laser gyroscope reliability testing system and method

A laser gyroscope and test system technology, applied in the field of inertial measurement, can solve the problems of high test cost and time cost, and achieve the effect of reducing test time and cost

Active Publication Date: 2019-12-13
XIAN FLIGHT SELF CONTROL INST OF AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high reliability (MTBF up to 80000h) and long life characteristics of the laser gyroscope, using the traditional reliability evaluation method to verify the reliability index requires high test cost and time cost

Method used

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  • Laser gyroscope reliability testing system and method
  • Laser gyroscope reliability testing system and method
  • Laser gyroscope reliability testing system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a laser gyroscope reliability testing method, the specific process is as follows:

[0041] Step 1: Start multiple groups of laser gyroscopes and apply electrical stress and temperature stress respectively;

[0042] Step 2: Read the light intensity and mode voltage of the laser gyro in real time and calculate the bias stability until any of them reaches the degradation threshold to obtain the degradation data of each group of laser gyroscopes;

[0043] Step 3: Use five degraded trajectory models to degenerate and fit the light intensity code value parameters and mode voltage parameters of the laser gyroscope, and compare the time of each test point of the laser gyroscope under different sensitive stresses and different stress levels The code value and modulus voltage are respectively substituted into the five degradation trajectory models, and the degradation model is linearized, including logarithmization and parameter substitution, and then the...

Embodiment 2

[0046] Embodiment 2, a laser gyro reliability testing method

[0047] figure 2 It is a flow chart of the specific implementation. In the laser gyro degradation test, the temperature stress acting on the laser gyro can be increased by increasing the temperature, and the electrical stress acting on the laser gyro can be increased by increasing the laser discharge current. Multiple laser gyroscopes 1 can be installed inside each temperature stress application device 2 , at least two temperature stress application devices 2 are set to test with different temperature stresses, and at least two electrical stress application devices 3 are used to apply different electrical stresses.

[0048] Read the light intensity, mode voltage, and beat frequency of the laser gyroscope under different degradation test temperature stresses and electrical stresses in different degradation tests in real time, until any of them reaches the degradation threshold, and obtain the degradation data of ea...

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Abstract

The invention belongs to an inertia measurement technology and particularly relates to a laser gyroscope reliability testing system and method. The laser gyroscope reliability testing system comprisesa temperature stress application device (2), an electric stress application device (3), a control circuit (4) and at least one laser gyroscope (1), wherein the at least one laser gyroscope (1) is arranged in the temperature stress application device (2) and electrically connected with the electric stress application device (3), and the control circuit (4) is electrically connected with the at least one laser gyroscope (1) and the electric stress application device (3). The provided laser gyroscope reliability testing system and method are low in cost and short in time consumption, and productperformance is objectively evaluated.

Description

technical field [0001] The invention belongs to inertial measurement technology, in particular to a laser gyroscope reliability test system and a test method. Background technique [0002] Laser gyroscopes based on the Sagnac effect are widely used in various inertial navigation systems such as aviation, aerospace, and navigation as an angle measurement device. Due to the high reliability (MTBF up to 80000h) and long life characteristics of laser gyroscopes, using traditional reliability evaluation methods to verify reliability indicators requires high test costs and time costs. Through the failure mechanism analysis, it is found that the key functional performance parameters of the laser gyroscope - "output light intensity" gradually decreases with the prolongation of the working time, and the "mode voltage" gradually increases with the prolongation of the working time, and this degradation trend is irreversible . Therefore, the performance degradation data before the fai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 连晓棠张明辉马仰华李蕊冯池
Owner XIAN FLIGHT SELF CONTROL INST OF AVIC
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