Control device of high-temperature superconducting magnetometer measurement capable of automatically locking work point
A technology of high-temperature superconductivity and measurement and control device, which is applied to measurement devices, magnetic field measurement using superconducting devices, instruments, etc., can solve problems such as unsuitability for long-term field operations and long working point adjustment time, so as to reduce work costs. , the effect of improving work efficiency
Inactive Publication Date: 2014-03-12
JILIN UNIV
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Problems solved by technology
The above inventions all change the operation of the superconducting quantum interferometer measurement and control device from manual to the automatic mode in which the PC is the main control, but there are deficiencies, such as the need to observe the waveform through the computer to adjust the best working point of the magnetometer; working point adjustment The time is too long, and the computer has a power supply time limit, so it is not suitable for long-term field work
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[0020] Below in conjunction with accompanying drawing and embodiment for further detailed description:
[0021] The high-temperature superconducting magnetometer measurement and control device that automatically locks the working point is connected to the readout circuit 4 by the single-chip microcomputer 1 through the multi-channel DAC3 and the triangular wave signal generator 2 respectively, and the readout circuit 4 is connected through the superconducting quantum interferometer 5 and the multi-channel ADC6 It is formed by connecting with the single chip microcomputer 1.
[0022] The readout circuit 4 is composed of a superconducting quantum interferometer 5 fed back to the directional coupler 7 via a directional coupler 7 , a high frequency amplifier 8 , a mixer 9 , a low frequency amplifier 12 , an integrator 13 and a feedback circuit 14 .
[0023] The operation control of the high-temperature superconducting magnetometer measurement and control device that automatically ...
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The invention relates to a high-temperature superconducting magnetometer measurement and control device capable of automatically locking a work point. A single chip is used for controlling a triangular wave signal generator to output a standard triangular wave field sweep current to simulate an external magnetic field, multiple DAC(Digital Analogue Converters) are used for generating three analogue voltages, namely a tune voltage, a radio frequency level voltage and a direct current compensating voltage, for controlling the frequency compensation of a radio frequency oscillator, an attenuation coefficient of an attenuator and the direct current compensation of an amplifier in a read circuit. After the automatic adjusting of multiple DAC and ADC (Analogue Digital Converters) is completed, a superconducting quantum interference instrument reaches an optimal work point, and then the optimal work point is locked to complete the high-temperature superconducting magnetometer debugging. By the invention, the high-temperature superconducting magnetometer work point is automatically locked, and the problems that the traditional high-temperature superconducting magnetometer measurement and control device needs a computer to observe a waveform and adjust the optimal work point of the magnetometer, and work point adjusting time is too long and unsuitable for a long-time field operation. By the measurement and control device disclosed by the invention, the work efficiency is improved, the field operation cost is reduced, and the high-temperature superconducting magnetometer becomes more suitable for the field operation.
Description
Technical field: [0001] The invention relates to a high-temperature superconducting magnetometer measurement and control device, in particular to a high-temperature superconducting magnetometer measurement and control device with the function of automatically locking the working point and a method for automatically locking the working point. Background technique: [0002] Superconducting quantum interference device (SQUID) is the most sensitive sensor for weak magnetic measurement so far. The high-temperature superconducting magnetometer made of high-temperature SQUID working in a liquid nitrogen environment can be used in biomagnetism (such as magnetism, brain magnetism) measurement, non-destructive flaw detection, magnetic exploration, and military potential exploration and other fields. [0003] CN2473670Y discloses an automatic control interface device for a superconducting quantum interferometer, which is a multifunctional circuit with an MCS51 microprocessor as the cor...
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IPC IPC(8): G01R33/035G01R35/00
Inventor 任胜男赵静安战锋程德福王君
Owner JILIN UNIV