A non-magnetic temperature control system and method for serf atomic gas chamber
An atomic gas chamber and temperature control system technology, applied in the direction of steering induction equipment, etc., can solve the problems of unheatable body temperature measurement and feedback, SERF gyroscope signal interference, engineering realization difficulty, etc., to eliminate magnetic field interference, convenient control, high precision effect
Active Publication Date: 2021-07-13
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
Under normal circumstances, the pt100 temperature sensor can only measure the temperature of a single point, and cannot perform temperature measurement and feedback on the entire heating body.
Arranging multiple pt100s to measure the temperature of the heating body not only has high manufacturing costs, but also has certain difficulties in engineering implementation
At the same time, the current of pt100 when measuring temperature will generate an additional magnetic field, which will interfere with the final SERF gyroscope signal
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[0030] The non-magnetic heating technology of the atomic gas chamber is the key technology in the SERF gyroscope to ensure the normal operation of the gyroscope. The existing non-magnetic heating technology realizes the PID heating control of the atomic gas chamber by setting a non-magnetic heating chip and a temperature feedback element (such as Pt100). However, the driving current applied when the temperature feedback element is working will still introduce a weak magnetic field and interfere with the output signal of the SERF gyroscope. Moreover, the temperature feedback element placed on the gas chamber heating body can only measure the temperature at a point, which cannot eliminate the temperature gradient existing in the heating process of the atomic gas chamber, which restricts the further improvement of the SERF gyroscope's zero bias stability and other performance. In response to this problem, the present invention proposes a non-magnetic heating and temperature measu...
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Abstract
The invention relates to a non-magnetic temperature control system and method for a SERF atomic gas chamber. The system includes non-magnetic heating sheet, heating body, atomic gas chamber and heating system based on digital PID control. The atomic gas chamber is placed in the heating body and in close contact with the heating body, the non-magnetic heating sheet is pasted on the surface of the heating body through thermal silica gel, and the resistance change of the non-magnetic heating sheet is used as a feedback signal to the heating system based on digital PID control Realize the temperature control of the atomic gas chamber. By detecting the resistance change of the non-magnetic heating sheet, the stable control of the uniform temperature distribution of the heating system is realized. The temperature control method provides a new temperature measurement and control method without introducing an additional thermocouple device for temperature measurement, and eliminates problems such as inaccurate temperature measurement of the gas chamber, uneven temperature distribution, and magnetic field effects of the measurement current. Make the temperature control system to control the temperature of the air chamber more accurately.
Description
technical field [0001] The invention relates to a method for non-magnetic temperature control of a SERF atomic gas chamber, in particular to a method for measuring and driving the temperature of an atomic gas chamber mainly derived from alkali metals and inert gases, belonging to the atomic gas chamber of a SERF gyroscope. The technical field of room temperature stability control. Background technique [0002] The SERF gyroscope uses electron spin sensitive carrier to rotate information, and its core device is an alkali metal atomic gas cell. The atomic gas chamber is filled with alkali metal atoms, inert gas and buffer gas. Alkali metal atoms are solid at room temperature and can be vaporized by heating to interact with laser and inert gas atoms. Alkali metal atoms work in the spin-exchange-relaxation-free (SERF) state, and the temperature change of the gas cell will have a great impact on the density of the alkali metal atoms, and will also affect the electron spin relax...
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IPC IPC(8): G01C19/58
Inventor 秦亮王巍秦德鑫石猛霍娟王天顺王风娇李新坤王学锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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