Liquid quantum-free quantum Hall resistance transfer device
A transfer device, helium quantum technology, applied in measurement devices, measurement of resistance/reactance/impedance, measurement of electrical variables, etc., can solve the problems of harsh working conditions, complicated operation, and limit the promotion and application of quantum Hall resistance, and achieve high performance. Accuracy, the effect of reducing complexity
Active Publication Date: 2018-05-18
NAT INST OF METROLOGY CHINA
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Problems solved by technology
[0004] The invention aims at the problem that the traditional quantum Hall resistance reference device has harsh working conditions and complex operation, which limits the promotion and application of the quantum Hall resistance standard and affects the transmission of high-accuracy measurement value of the resistance unit, and maintains the quantum Hall by providing a liquid-free helium Portable devices for resistance transmission, thereby promoting the development of flattened transmission of values in the field of electromagnetic measurement, and generating important social and economic benefits
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Embodiment 1
[0037] figure 1 A schematic diagram of the liquid helium-free quantum Hall resistance transfer device according to the present invention is shown, wherein Rs is connected to the quantum Hall resistance sample, and Rx is connected to the measured standard resistor.
[0038] Such as figure 1 As shown, the present invention provides a liquid helium-free quantum Hall resistance transfer device, the device includes: a superconducting magnet, the superconducting magnet includes a superconducting coil 6 and a sample space 7, and the sample space 7 is arranged on the superconducting coil 6 to generate The magnetic field center of the refrigerator 2, the refrigerator 2 is connected with the superconducting magnet, and provides a cold source for the superconducting magnet; the quantum Hall resistance chip 3, and the quantum Hall resistance chip 3 is arranged in the sample space 7; the resistance circuit of the current comparator The bridge 4, the current comparator resistance bridge 4 ...
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The invention discloses a liquid quantum-free quantum Hall resistance transfer device. The device comprises a superconducting magnet, a refrigerator, a quantum Hall resistor chip, a current comparatorresistance bridge and a standard resistor; the superconducting magnet comprises a superconducting coil and a sample space, wherein sample space is arrranged at the center of a magnetic field generated by the superconducting coil; the refrigerator is connected with the superconducting magnet and provides a cold source for the superconducting magnet; the quantum Hall resistor chip is arranged in the sample space; the current comparator resistance bridge is electrically connected with the quantum Hall resistor chip; and the standard resistor is electrically connected with the current comparatorresistance bridge. The quantum Hall resistance transfer device proposed in the present invention is a liquid quantum-free portable device to maintain quantum Hall resistance transfer. With the quantumHall resistance transfer device adopted, the complexity of a conventional quantum Hall resistance reference device as well as the high cost and complicated operation of the application of liquid helium can be greatly decreased; the high accuracy of quantity value transfer can be ensured; the development of flat transmission of quantity values in the electromagnetic measurement field can be promoted; and great social and economic benefits can be brought about.
Description
technical field [0001] The invention belongs to the field of precision electrical measurement, and more specifically relates to a liquid-free helium quantum Hall resistance transfer device. Background technique [0002] According to the suggestion of the International Committee of Metrology CIPM, starting from January 1, 1990, the DC quantized Hall resistance benchmark was used worldwide, which opened the era of quantization of electromagnetic measurement. The reproduction of the resistance unit no longer depends on the physical resistance, but is reproduced from the quantized Hall resistance benchmark. my country built a quantized Hall resistance standard device in 2003, and its standard uncertainty reached 2.4×10 -10 , although the standard uncertainty of my country's quantized Hall resistance benchmark is extremely small, it is limited by the environmental harshness (high magnetic field, extremely low temperature) and experimental complexity of reproducing the quantum Ha...
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IPC IPC(8): G01R27/08
CPCG01R27/08
Inventor 鲁云峰赵建亭贺青韩冰
Owner NAT INST OF METROLOGY CHINA