Temperature Segment Frequency Stabilization Control Technology in Prisms Laser Gyroscope

Fig. 4. Temperature distributions of ring resonator and frequency stabilization gas channel with temperature from -25 ℃ to 70 ℃. (a) Isogram; (b) curves

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Fig. 5. Temperature distributions of ring resonator and frequency stabilization gas channel with temperature from -70 ℃ to 25 ℃. (a) Isogram; (b) curves

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Fig. 6. Fitting curves of temperature of frequency stabilization gas center and time. (a) 25 ℃→70 ℃; (b) 70 ℃→25 ℃

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Fig. 7. Test device diagram of variable temperature experiment

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Table 1. Thermodynamic parameters of materials involved in finite element analysis
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Table 1. Thermodynamic parameters of materials involved in finite element analysis
Material Thermal conductivity /(W·m^-1·℃¹) Specific heat capacity C /(J·kg^-1·℃^-1) Density ρ /(kg·m^-3)
Glass-ceramic 1.46 800 2530
Dry air 262.4 720 1.199

Table 2. Fitting curve coefficients of temperature difference between inner and outer of cavity and time

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Table 2. Fitting curve coefficients of temperature difference between inner and outer of cavity and time

Temperature range /℃	Temperature rise and fall process [y=aexp(bx)+cexp(dx)]				Insulation process [y=aexp(bx)]
Temperature range /℃	a	b	c	d	a	b
25→70	59.67	-9.25×10^-5	-59.91	-0.0004	122.7	-0.00056
70→25	-59.67	-9.25×10^-5	59.91	-0.0004	-122.7	-0.00056
25→-40	-35.77	-8.89×10^-6	36.10	-0.00055	-270.6	-0.00056
-40→25	35.77	-8.89×10^-6	-36.10	-0.00055	-270.6	-0.00056

Table 3. Comparison of gyroscope accuracy under different frequency stabilization control methods

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Table 3. Comparison of gyroscope accuracy under different frequency stabilization control methods

Temperature range /℃	Gyroscop number	Gyroscope accuracy controlled by old program /[(°)·h^-1]	Gyroscope accuracy controlled by temperature segment /[(°)·h^-1]
	1^#	0.0112	0.0110
25→70	2^#	0.0122	0.0120
	3^#	0.0115	0.0101
	1^#	0.0153	0.0112
70→25	2^#	0.0172	0.0168
	3^#	0.0159	0.0135
	1^#	0.0217	0.0187
25→-40	2^#	0.0238	0.0229
	3^#	0.0281	0.0253
	1^#	0.0310	0.0211
-40→25	2^#	0.0289	0.0206
	3^#	0.0309	0.0176

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Liu Jianning, Bian Xiaoyun, Weng Jun, Jiao Mingxing. Temperature Segment Frequency Stabilization Control Technology in Prisms Laser Gyroscope[J]. Chinese Journal of Lasers, 2020, 47(6): 601005

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Paper Information

Category: laser devices and laser physics

Received: Dec. 19, 2019

Accepted: --

Published Online: Jun. 3, 2020

The Author Email: Jianning Liu (liujianning@xaut.edu.cn)

DOI:10.3788/CJL202047.0601005

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Thermodynamic parameters of materials involved in finite element analysis

Table 1. Thermodynamic parameters of materials involved in finite element analysis

Table 2. Fitting curve coefficients of temperature difference between inner and outer of cavity and time

Table 2. Fitting curve coefficients of temperature difference between inner and outer of cavity and time

Table 3. Comparison of gyroscope accuracy under different frequency stabilization control methods

Table 3. Comparison of gyroscope accuracy under different frequency stabilization control methods