Intelligent digital helium optically-pumped magnetometer

Abstract

The invention discloses an intelligent digital helium optically-pumped magnetometer. A helium optically-pumped probe is connected with a controlled power source, a radio frequency signal conditioning unit, a lamp room brightness detection unit and a resonant signal conditioning unit respectively; the controlled power source, the radio frequency signal conditioning unit, the lamp room brightness detection unit and the resonant signal conditioning unit are all connected with an FPGA (Field Programmable Gate Array) module; the FPGA module is connected with a DSP (Digital Signal Processor) module; a communication interface is connected with the DSP module. The intelligent digital helium optically-pumped magnetometer has the beneficial effects of high digitization and degree of intelligence, wide range, high stability, lamp room brightness self-detection, resonant signal quality self-detection, functional performance self-detection, fault positioning, frequency response self-regulation and the like. In addition, an RS422 interface and a wireless 1553B bus are also integrated, and data of other equipment on an aircraft can be received for processing and then is uploaded.

Description

technical field [0001] The invention relates to the fields of magnetic exploration and aviation anti-submarine, more precisely, it is an intelligent digital helium optical pump magnetometer. Background technique [0002] The helium optical pump magnetometer is based on the Zeeman splitting of helium atoms in an external magnetic field, and is developed by using optical pumping and magnetic resonance phenomena. It has been widely used in magnetic exploration, aviation anti-submarine and other fields. [0003] Chinese Patent CN1034059A-"Tracking Helium (He4) Optical Pump Magnetometer" proposes an analog tracking magnetometer, which includes analog circuits such as voltage-controlled oscillators, phase shifters, and integrators, and has narrow measuring range and low linearity , poor anti-interference ability and counter errors. With the development of direct digital frequency synthesis (DDS) technology, scholars at home and abroad have proposed to use DDS to replace the volta...

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Problems solved by technology

[0003] Chinese Patent CN1034059A-"Tracking Helium (He4) Optical Pump Magnetometer" proposes an analog tracking magnetometer, which includes analog circuits such as voltage-controlled oscillators, phase shifters, and integrators, and has narrow measuring range and low linearity , poor anti-interference ability and counter errors

[0004] In recent years, Chinese patents CN202929184U-"full-digital detection device for helium optical pump magnetic resonance signal", CN102854537A-"a digital fast-tracking magnetometer" and CN203259640U-"new full-digital helium optical pump magnetometer" have proposed similar structures The digitized helium optical pump magnetometer is digitalized by PLD or FPGA, but none of them have intelligent features, nor can they be directly used in airborne magnetic exploration, especially in the field of airborne anti-submarine

These patents are not sufficiently digitized and do not have intelligent features. The concrete manifestations are: the low-reliability high-voltage spark gun is still used for lighting the lamp room, no independent detection of equipment function performance, no independent detection of light and dark of the lamp room, and no probe resonance signal Quality independent evaluation method; does not have 1553B bus interface, cannot be interconnected with other equipment on the aircraft, and cannot be directly used for airborne magnetic exploration and aviation anti-submarine

In addition, although CN202929184U proposes a digital phase-sensitive detector, it is limited by the number of high-speed ADCs, and only 18 bits of ADC are used, and the resolution that can be achieved is higher than that of the analog phase-sensitive detector and high-precision detector used in the present invention. ADC combination should be low

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