Atomic gas chamber temperature closed-loop control method based on optical pumping saturated absorption

An atomic gas chamber and temperature closed-loop technology, applied in temperature control, physical/chemical change thermometers, thermometers, etc., can solve the problem that a single thermistor cannot truly reflect the temperature change of the gas chamber, limit the adjustability of the temperature control range, and Flexibility, magnetic field interference and other issues, to achieve the effect of avoiding magnetic field interference, improving adjustability, and reducing the influence of temperature gradient

Active Publication Date: 2020-04-24
BEIJING AUTOMATION CONTROL EQUIP INST
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Problems solved by technology

However, since the gas chamber is made of glass, which has poor thermal conductivity and a large gradient difference, a single thermistor cannot truly reflect the temperature change inside the gas chamber; the temperature measurement process will also generate magnetic field interference near the gas chamber; and Analog closed-loop control limits the adjustability and flexibility of the temperature control range

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  • Atomic gas chamber temperature closed-loop control method based on optical pumping saturated absorption
  • Atomic gas chamber temperature closed-loop control method based on optical pumping saturated absorption
  • Atomic gas chamber temperature closed-loop control method based on optical pumping saturated absorption

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Embodiment Construction

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] A method for closed-loop temperature control of an atomic gas cell based on optically pumped saturated absorption, comprising the following steps:

[0047] (1) Temperature measurement based on optically pumped saturated absorption

[0048] The light intensity signal transmitted through the gas cell is closely related to the saturated vapor pressure density of atoms in the atomic gas cell. The fluctuation of the gas cell temperature will directly affect the saturated vapor pressure density, and then affect the transmitted light intensity. Therefore, the temperature information of the gas chamber can be directly calculated by detecting the light intensity signal passing through the gas chamber.

[0049] Step 1: The laser generates laser light corresponding to the atomic energy level transition frequency, which is divided into tw...

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Abstract

The invention discloses an atomic gas chamber temperature closed-loop control method based on optical pumping saturated absorption. The method comprises the following steps: (1), performing temperature measurement based on optical pumping saturated absorption; and (2), performing digital closed-loop control. The method has the following beneficial effects: high-stability closed-loop control of thetemperature of the atomic gas chamber is realized; compared with the traditional temperature measurement technology based on a thermistor and a simulation closed-loop control method, the atomic gas chamber temperature closed-loop control method can truly reflect the temperature change in the atomic gas chamber; the influence of the temperature gradient caused by the low heat conductivity coefficient of the glass is reduced and the stability of the temperature in the gas chamber is improved; the magnetic field interference generated by temperature detection signals is avoided; moreover, the influence of a limited temperature control range caused by an unbalanced bridge and analog closed-loop control is avoided, and the adjustability of the temperature control range is improved.

Description

technical field [0001] The invention belongs to a temperature control method, in particular to a temperature closed-loop control method based on optical pumping saturation absorption, which is suitable for the closed-loop temperature control of atomic gas chambers of atomic magnetometers and atomic gyroscopes. Background technique [0002] The atomic saturation vapor pressure density n in the atomic gas chamber directly affects the output signals of the atomic magnetometer and atomic gyroscope related to the magnetic field information, which can be simplified as: [0003] [0004] Among them, A and B are constants related to atoms, and T is the temperature of the atomic gas chamber. Its stability directly affects the stability of magnetic field measurement and closed-loop control, and restricts the improvement of the accuracy of the atomic gyroscope and magnetometer. Therefore, the temperature of the atomic gas chamber Closed-loop control is a key technology in this field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/24G01K11/12
CPCG05D23/24G01K11/12
Inventor 秦杰薛帅汤恩琼郭宇豪刘建丰
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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