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

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...

AI Technical Summary

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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