KR970071030A - Magnetic field measuring device - Google Patents

Magnetic field measuring device Download PDF

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Publication number
KR970071030A
KR970071030A KR1019960012930A KR19960012930A KR970071030A KR 970071030 A KR970071030 A KR 970071030A KR 1019960012930 A KR1019960012930 A KR 1019960012930A KR 19960012930 A KR19960012930 A KR 19960012930A KR 970071030 A KR970071030 A KR 970071030A
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KR
South Korea
Prior art keywords
signal
quantum interference
magnetic field
superconducting quantum
interference device
Prior art date
Application number
KR1019960012930A
Other languages
Korean (ko)
Other versions
KR100198555B1 (en
Inventor
김홍득
오병두
문승현
최영환
Original Assignee
구자홍
Lg 전자주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 구자홍, Lg 전자주식회사 filed Critical 구자홍
Priority to KR1019960012930A priority Critical patent/KR100198555B1/en
Publication of KR970071030A publication Critical patent/KR970071030A/en
Application granted granted Critical
Publication of KR100198555B1 publication Critical patent/KR100198555B1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G01R33/0354—SQUIDS

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)

Abstract

본 발명은 초전도 양자간섭소자(SQUID)를 이용한 자장 측정 장치에 관한 것으로서, 특히 외부 자속을 초전도 접합의 양단에 전압으로 변환시키는 초전도 양자 간섭소자로 구성된 감지부와, 상기 감지부에서 감지된 신호를 증폭, 변조, 복조시키며 상기 감지된 신호의 위상을 변환시키는 변환회로를 포함하는 신호처리부와, 상기 신호처리부의 신호로 초전도 양자간섭 소자의 루프에 자속을 되먹임해주는 되먹임부로 구성되어, 복조시 국부발진기 신호의 위상을 교류 바이어스 전류 공급기(2진 카운터)의 위상 변화에 따라 180도 변환시켜 진폭변조된 초전도 양자간섭 소자(SQUID)의 출력신호의 위상과 일치시킴으로써, 변조된 신호의 복원 효율을 향상시켜 외부 신호에 대한 분해능을 높인다.The present invention relates to a magnetic field measuring apparatus using a superconducting quantum interference device (SQUID), and more particularly, to a magnetic field measuring device using a superconducting quantum interference device for converting external magnetic fluxes into voltages at both ends of a superconducting junction, And a feedback circuit for feeding back a magnetic flux to a loop of the superconducting quantum interference device as a signal of the signal processing unit, wherein the demodulation local oscillator The phase of the signal is converted 180 degrees in accordance with the phase change of the AC bias current supply (binary counter) to match the phase of the output signal of the amplitude modulated superconducting quantum interference device (SQUID), thereby improving the recovery efficiency of the modulated signal Increase resolution for external signals.

Description

자장측정장치Magnetic field measuring device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제4도는 본 발명에 따른 자장측정장치의 구성블럭도, 제5도(a) 내지 (e)는 본 발명에 따른 자장측정장치의 각 부의 동작파형도.FIG. 4 is a block diagram of a magnetic field measuring apparatus according to the present invention; FIG. 5 (a) to FIG. 5 (e) are operational waveforms of respective parts of a magnetic field measuring apparatus according to the present invention;

Claims (3)

외부 자속을 초전도 접합의 양단에 전압으로 변환시키는 초전도 양자 간섭소자로 구성된 감지수단과; 상기 감지수단에서 감지된 신호를 증폭, 변조, 복조시키며 상기 감지된 신호의 위상을 변환시키는 변환회로를 포함하는 신호처리수단과; 상기 신호처리수단의 신호로 초전도 양자간섭 소자의 루프에 자속을 되먹임해주는 되먹임 수단을 포함하여 구성되는 것을 특징으로 하는 자장측정장치.Sensing means comprising a superconducting quantum interference device for converting an external magnetic flux into a voltage across the superconducting junction; A signal processing means for amplifying, modulating, and demodulating a signal sensed by the sensing means, and converting a phase of the sensed signal; And feedback means for feeding back the magnetic flux to the loop of the superconducting quantum interference element by a signal of the signal processing means. 제1항에 있어서, 상기 신호처리수단의 변환회로는 국부 발진기와, 상기 국부 발진기의 출력에 의해 트리거되는 교류 바이어스 전류 공급기와, 상기 교류 바이어스 전류 공급기의 신호변화에 따라 상기 국부발진기의 출력신호의 위상을 변화시키는 논리 게이트로 이루어짐을 특징으로 하는 자장측정장치.2. The oscillator according to claim 1, wherein the conversion circuit of the signal processing means comprises a local oscillator, an AC bias current supply triggered by the output of the local oscillator, And a logic gate for changing the phase of the magnetic field. 제2항에 있어서, 상기 교류 바이어스 전류 공급기는 2진 카운터로 이루어짐을 특징으로 하는 자장측정장치.3. The magnetic field measuring apparatus according to claim 2, wherein the AC bias current supply comprises a binary counter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960012930A 1996-04-25 1996-04-25 Magnetometer KR100198555B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960012930A KR100198555B1 (en) 1996-04-25 1996-04-25 Magnetometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960012930A KR100198555B1 (en) 1996-04-25 1996-04-25 Magnetometer

Publications (2)

Publication Number Publication Date
KR970071030A true KR970071030A (en) 1997-11-07
KR100198555B1 KR100198555B1 (en) 1999-06-15

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Application Number Title Priority Date Filing Date
KR1019960012930A KR100198555B1 (en) 1996-04-25 1996-04-25 Magnetometer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000077237A (en) * 1999-05-13 2000-12-26 오카야마 노리오 Magnetic field bias adjusting device for SQUID modulation drive circuit achieving easy adjustment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000077237A (en) * 1999-05-13 2000-12-26 오카야마 노리오 Magnetic field bias adjusting device for SQUID modulation drive circuit achieving easy adjustment

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Publication number Publication date
KR100198555B1 (en) 1999-06-15

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