Ultra-low frequency voltage AC-DC conversion verification system and method based on quantum technology
A technology of AC-DC conversion and quantum technology, which is applied in the field of ultra-low frequency voltage AC-DC conversion verification system, can solve the problems that the accuracy of AC-DC conversion results is difficult to guarantee, and the rationality of dual heating wire thermoelectric converters cannot be verified. The effect of verification and reliability assurance
Active Publication Date: 2021-11-23
NAT INST OF METROLOGY CHINA +2
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Problems solved by technology
The prerequisite for dual heating wire thermoelectric converters to realize AC-DC conversion of ultra-low frequency voltage is to output stable DC thermoelectric potentials in both AC and DC states, and to eliminate the influence of input signal frequency on output thermoelectric potentials. The parameters are evaluated and compensated, and the accuracy of the AC-DC conversion results is difficult to guarantee
At present, there is a lack of a method to verify the accuracy of AC-DC conversion of ultra-low frequency voltage, and it is impossible to verify the rationality of the evaluation results of the uncertainty evaluation results of AC-DC conversion of ultra-low frequency voltage by dual heating wire thermoelectric converters
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[0045] Below in conjunction with accompanying drawing and embodiment the invention is described in further detail:
[0046] The ultra-low frequency voltage AC-DC conversion verification system based on quantum technology consists of quantum voltage generation system 1, low frequency signal source 2, follower 3, switch 4, switch 5, switch 6, double heating wire thermoelectric converter 7, nanovolt meter 8, A clock source 9, a high-precision digital sampling system 10, and a host computer 11 are composed. Quantum voltage generation system 1 is connected to switch 4, switch 5, and channel B of high-precision digital sampling system 10 through follower 3, low-frequency signal source 2 is connected to switch 4, switch 5, and switch 6, and switch 6 is connected to high-precision digital sampling system 10. The channel A of the system 10, the switch 4 and the switch 5 are connected to the double heating wire thermoelectric transducer 7, the double heating wire thermoelectric transducer...
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The invention discloses an ultra-low frequency voltage AC-DC conversion verification system and method based on a quantum technology. According to the ultra-low frequency voltage AC-DC conversion verification system and method, the system comprises a quantum voltage generation system, a low-frequency signal source, a follower, three switches, a double-heating-wire thermoelectric converter, a nanovoltmeter, a clock source, a high-precision digital sampling system and an upper computer. Based on direct-current and alternating-current quantum voltage technologies and in combination with a double-heating-wire thermoelectric converter, ultra-low frequency voltage is traced to direct-current quantum voltage through AC-DC conversion, the conversion result is compared with alternating-current quantum voltage for verification, and the accuracy of AC-DC conversion of the ultralow-frequency voltage and the reasonability of the uncertainty evaluation result are verified, the reliability of ultra-low frequency voltage AC-DC conversion is ensured, and the problem that the ultra-low frequency voltage AC-DC conversion result cannot be verified is solved.
Description
technical field [0001] The invention belongs to the field of AC voltage measurement, in particular to a verification system and method for ultra-low frequency voltage AC-DC conversion based on quantum technology Background technique [0002] Ultra-low frequency voltage signal precision measurement is widely used in vibration signal measurement, new energy vehicle power battery measurement research and high voltage test and other fields. The frequency upper limit of the vibration signal generally does not exceed 10Hz, and some are even in the order of mHz. The measurement of low-frequency vibration signals is often realized by converting vibration sensors into electrical signal measurements; Zhongzheng has received more and more attention. The research difficulty is that the accuracy of its ultra-low frequency is difficult to be guaranteed, and it is necessary to establish an ultra-low frequency voltage standard; in addition, the ultra-low frequency voltage technology also ha...
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IPC IPC(8): G01R19/22G01R19/25
CPCG01R19/22G01R19/2509G01R19/225G01R35/02G01R35/007
Inventor 石照民潘仙林宋莹周天地徐晴段梅梅田正其赵双双
Owner NAT INST OF METROLOGY CHINA