CN102175980A - High-temperature superconducting magnetometer measurement and control device capable of automatically locking work point - Google Patents
High-temperature superconducting magnetometer measurement and control device capable of automatically locking work point Download PDFInfo
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Abstract
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:
The present invention relates to the high-temperature superconducting magnetometer measure and control device, relate in particular to a kind of method that has the measure and control device of the high-temperature superconducting magnetometer that automatically locks the working point function and automatically lock the working point.
Background technology:
Superconducting quantum interference device (SQUID) is the highest weak magnetic survey sensor of sensitivity so far.Utilization works in high-temperature superconducting magnetometer that the high temperature SQUID of liquid nitrogen environment makes can be with biological magnetic (after one's own heart magnetic, brain magnetic) measurement, nondestructive examination, magnetometer survey and the military field such as dive of visiting.
CN2473670Y discloses the automatic control interface device of a kind of superconducting quantum interference device (SQUID), and taking the MCS51 microprocessor is the multifunctional circuit of core; This multifunctional circuit comprises one or two above identical parallel circuits, the output terminal of each parallel circuit is connected with a Q9 plug with one 9 pin plug, 9 pin plugs and Q9 plug again with the superconducting quantum interference device (SQUID) prime amplifier on 9 needle sockets link to each other with the Q9 socket; Another of multifunctional circuit 9 pin plugs are connected, and this plug links to each other with the computing machine communication port.CN2739694Y discloses a kind of superconducting quantum interference device (SQUID) computer interface unit, described self-operated measuring unit adopts the AVR single-chip microcomputer, adopt USB interface to be connected between this single-chip microcomputer and the computing machine, self-operated measuring unit and superconducting quantum interference device (SQUID) junction are provided with 15 pin plugs, the corresponding connection of 15 needle sockets on this 15 pin plug and the superconducting quantum interference device (SQUID).More than invention is all made the automated manner of master control with the operation of superconducting quantum interference device (SQUID) measure and control device from manually changing PC into, but all has deficiency, observes waveform as needs by computing machine, regulates the best operating point of magnetometer; Overlong time is regulated in the working point, and computing machine has the restriction of power-on time, is not suitable for long-time field work.
Summary of the invention:
Purpose of the present invention is exactly at above the deficiencies in the prior art, and a kind of long-time field work that is suitable for is provided, and can automatically lock the high-temperature superconducting magnetometer measure and control device and the method for best operating point.
The objective of the invention is to be achieved through the following technical solutions:
Automatically locking the high-temperature superconducting magnetometer measure and control device of working point, is to be connected with sensing circuit 4 with triangular signal generator based 2 through multichannel DAC3 respectively by single-chip microcomputer 1, and sensing circuit 4 connects and composes through superconducting quantum interference device (SQUID) 5, multi-channel A C6 and single-chip microcomputer 1.
Sensing circuit 4 is to feed back to directional coupler 7 by superconducting quantum interference device (SQUID) 5 through directional coupler 7, radio-frequency amplifier 8, frequency mixer 9, low-frequency amplifier 12 integrators 13 and feedback circuit 14 to constitute.
The high-temperature superconducting magnetometer measure and control device automatically locks the method for working point, comprises following order and step:
A, single-chip microcomputer 1 control-signals generator 2 produce the standard triangular wave, and to sensing circuit 4 transmission triangular signals, superconducting quantum interference device (SQUID) 5 is debugged, outputting standard triangular wave field sweep current analog external magnetic field, single-chip microcomputer 1 control multichannel DAC3 produces three road aanalogvoltages, be respectively tuning voltage, high-frequency level voltage and DC compensation voltage, be used for controlling the frequency of sensing circuit 4 medium-high frequency oscillators 10, the attenuation coefficient of attenuator 11 and the DC compensation of low-frequency amplifier 12;
B, passage one are regulated automatically: the frequency of the high frequency oscillator 10 of 4 li of sensing circuits controlled and regulates automatically by single-chip microcomputer 1, the signal that high frequency oscillator 10 produces is sent into superconducting quantum interference device (SQUID) 5, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, adjust the frequency of high frequency oscillator 10 according to the Automatic Frequency of output waveform, until producing both triangular waves of outer magnetic flux adjustment curve, superconducting quantum interference device (SQUID) 5 is in resonant condition at this moment;
C, passage two are regulated automatically: the attenuation coefficient of the attenuator 11 of 4 li of sensing circuits controlled and regulates automatically by single-chip microcomputer 1, multi-channel A C6 gathers superconducting quantum interference device (SQUID) 5 output waveforms, automatically adjust the attenuation coefficient of attenuator 11 according to the amplitude of output waveform, when the amplitude of outer magnetic flux adjustment curve is maximum, output waveform reaches maximum signal to noise ratio, finishes attenuator 11 attenuation coefficients and regulates;
D, passage three are regulated automatically: the DC compensation of the low-frequency amplifier 12 of 4 li of sensing circuits is controlled and regulated to single-chip microcomputer automatically, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, automatically adjust the DC compensation of amplifier according to output waveform, when DC level is zero, finishes the DC compensation of low-frequency amplifier 12 and regulate;
After e, multichannel DAC3 regulated and finish, superconducting quantum interference device (SQUID) 5 reached best operating point, and multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, sends single-chip microcomputer 1 back to, and the debugging of superconducting quantum interference device (SQUID) 5 is finished in single-chip microcomputer 1 this working point of locking.
F, single-chip microcomputer 1 are measured magnetic field, and multichannel DAC6 gathers measurement data, and single-chip microcomputer 1 storage data also show the measurement magnetic field value.
Beneficial effect: the present invention has not only realized automatically locking of high-temperature superconducting magnetometer working point, and solved existing high-temperature superconducting magnetometer measure and control device and need observe waveform by computing machine, regulate the best operating point of magnetometer, overlong time is regulated in the working point, is not suitable for problems such as long-time field work.Improved work efficiency, reduced the field work cost, made high-temperature superconducting magnetometer be more suitable for the field.
Description of drawings:
Accompanying drawing 1 automatically locks the high-temperature superconducting magnetometer measure and control device structured flowchart of working point
Sensing circuit 4 structured flowcharts in accompanying drawing 2 accompanying drawings 1
Accompanying drawing 3 automatically locks the high-temperature superconducting magnetometer measure and control device workflow diagram of working point
The high-temperature superconducting magnetometer measure and control device that accompanying drawing 4 automatically locks the working point automatically locks working point software flow Fig. 1 single-chip microcomputer, and 2 is triangular signal generator based, 3 multichannel DAC, 4 sensing circuits, 5 superconducting quantum interference devices, 6 multi-channel A C, 7 directional couplers, 8 radio-frequency amplifiers, 9 frequency mixer, 10 high frequency oscillators, 11 attenuators, 12 low-frequency amplifiers, 13 integrators, 14 feedback circuits.
Embodiment:
Be described in further detail below in conjunction with drawings and Examples:
Automatically locking the high-temperature superconducting magnetometer measure and control device of working point, is to be connected with sensing circuit 4 with triangular signal generator based 2 through multichannel DAC3 respectively by single-chip microcomputer 1, and sensing circuit 4 connects and composes through superconducting quantum interference device (SQUID) 5, multi-channel A C6 and single-chip microcomputer 1.
Sensing circuit 4 is to feed back to directional coupler 7 by superconducting quantum interference device (SQUID) 5 through directional coupler 7, radio-frequency amplifier 8, frequency mixer 9, low-frequency amplifier 12 integrators 13 and feedback circuit 14 to constitute.
The high-temperature superconducting magnetometer measure and control device operation control that automatically locks the working point is to be responsible for by single-chip microcomputer 1, and single-chip microcomputer 1 is the core of measure and control device, control and the work of coordination each several part.By the triangular signal generator based generation standard triangular wave of single-chip microcomputer 1 control, when being used for the high-temperature superconducting magnetometer debugging, outputting standard triangular wave field sweep current analog external magnetic field.
Single-chip microcomputer 1 control DAC3 produces three road aanalogvoltages, be respectively tuning voltage, high-frequency level voltage and DC compensation voltage, be mainly used to control the DC compensation of sensing circuit 4 medium and low frequency amplifiers 12, the frequency of high frequency oscillator 10 and the attenuation coefficient of attenuator 11.Tuning voltage is used for regulating the frequency of sensing circuit 4 medium-high frequency oscillators 10, the frequency that high frequency oscillator 10 produces is sent into superconducting quantum interference device (SQUID) 5, gather the output waveform of superconducting quantum interference device (SQUID) 5, regulate the frequency of high frequency oscillator 10 according to the Automatic Frequency of output waveform, when both frequencies equate, produce outer magnetic flux adjustment curve (triangular wave), this moment, superconducting quantum interference device (SQUID) 5 was in resonant condition.High-frequency level voltage is used for regulating the attenuation coefficient of attenuator in the sensing circuit 4, gather the output waveform of superconducting quantum interference device (SQUID) 5, automatically regulate the attenuation coefficient of regulated attenuator 11 according to the amplitude of output waveform, when the amplitude of outer magnetic flux adjustment curve (triangular wave) was maximum, output waveform reached maximum signal to noise ratio.DC compensation is used for regulating the DC compensation of low-frequency amplifier 12, gathers the output waveform of superconducting quantum interference device (SQUID) 5, according to the DC compensation that output waveform is regulated low-frequency amplifier 12 automatically, makes outer magnetic flux adjustment curve (triangular wave) about the X-axis symmetry.
After finishing the automatic adjusting of 3 road DAC3, superconducting quantum interference device (SQUID) 5 reaches best operating point, and multi-channel A C6 gathers superconducting quantum interference device (SQUID) 5 output waveforms, sends back to single-chip microcomputer 1, single-chip microcomputer 1 this working point of locking, last single chip computer measurement magnetic field and demonstration magnetic field value.
The high-temperature superconducting magnetometer measure and control device automatically locks the method for working point, comprises following order and step:
A, single-chip microcomputer 1 control-signals generator 2 produce the standard triangular wave, and to sensing circuit 4 transmission triangular signals, superconducting quantum interference device (SQUID) 5 is debugged, outputting standard triangular wave field sweep current analog external magnetic field, single-chip microcomputer 1 control multichannel DAC3 produces three road aanalogvoltages, be respectively tuning voltage, high-frequency level voltage and DC compensation voltage, be used for controlling the frequency of sensing circuit 4 medium-high frequency oscillators 10, the attenuation coefficient of attenuator 11 and the DC compensation of low-frequency amplifier 12;
B, passage one are regulated automatically: high frequency oscillator 10 frequencies of 4 li of sensing circuits controlled and regulate automatically by single-chip microcomputer 1, the signal that high frequency oscillator produces is sent into superconducting quantum interference device (SQUID) 5, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, adjust the frequency of high frequency oscillator 10 according to the Automatic Frequency of output waveform, until producing both triangular waves of outer magnetic flux adjustment curve, superconducting quantum interference device (SQUID) 5 is in resonant condition at this moment;
C, passage two are regulated automatically: the attenuation coefficient of the attenuator 11 of 4 li of sensing circuits controlled and regulates automatically by single-chip microcomputer 1, multi-channel A C6 gathers superconducting quantum interference device (SQUID) 5 output waveforms, automatically adjust the attenuation coefficient of attenuator 11 according to the amplitude of output waveform, when the amplitude of outer magnetic flux adjustment curve is maximum, output waveform reaches maximum signal to noise ratio, finishes attenuator 11 attenuation coefficients and regulates;
D, passage three are regulated automatically: the DC compensation of the low-frequency amplifier 12 of 4 li of sensing circuits is controlled and regulated to single-chip microcomputer automatically, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, automatically adjust the DC compensation of low-frequency amplifier 12 according to output waveform, when DC level is zero, finishes the DC compensation of low-frequency amplifier 12 and regulate;
After e, multichannel DAC3 regulated and finish, superconducting quantum interference device (SQUID) 5 reached best operating point, and multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, sends single-chip microcomputer 1 back to, and the debugging of superconducting quantum interference device (SQUID) 5 is finished in single-chip microcomputer 1 this working point of locking.
F, single-chip microcomputer 1 are measured magnetic field, and multichannel DAC6 gathers measurement data, and single-chip microcomputer 1 storage data also show the measurement magnetic field value.
Automatically lock the concrete method of work of high-temperature superconducting magnetometer measure and control device of working point:
Step 1: at first produce the standard triangular wave by single-chip microcomputer 1 control triangular signal generator based 2, when being used to carry out the high-temperature superconducting magnetometer debugging, outputting standard triangular wave field sweep current analog external magnetic field.
Step 2: Single-chip Controlling multichannel DAC3 produces three road aanalogvoltages, be respectively tuning voltage, high-frequency level voltage and DC compensation voltage, be used for controlling the frequency of sensing circuit 4 medium-high frequency oscillators 10, the attenuation coefficient of attenuator 11 and the DC compensation of low-frequency amplifier 12.
Step 3: the frequency of 4 high frequency oscillator 10 in single-chip microcomputer 1 automatic control and the adjusting sensing circuit, the signal that high frequency oscillator 10 produces is sent into superconducting quantum interference device (SQUID) 5, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, adjust the frequency of high frequency oscillator 10 according to the Automatic Frequency of output waveform, magnetic flux adjustment curve (triangular wave) outside producing, this moment, superconducting quantum interference device (SQUID) 5 was in resonant condition.
Step 4: the attenuation coefficient of the attenuator 11 of 4 li of sensing circuits is controlled and regulated to single-chip microcomputer automatically, multi-channel A C6 gathers superconducting quantum interference device (SQUID) 5 output waveforms, automatically adjust the attenuation coefficient of attenuator 11 according to the amplitude of output waveform, when the amplitude of outer magnetic flux adjustment curve (triangular wave) is maximum, output waveform reaches maximum signal to noise ratio, finishes attenuator 11 attenuation coefficients and regulates.
Step 5: the DC compensation of the low-frequency amplifier 12 of 4 li of sensing circuits is controlled and regulated to single-chip microcomputer automatically, multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, automatically adjust the DC compensation of amplifier according to output waveform, when DC level is zero, finishes the DC compensation of low-frequency amplifier 12 and regulate.
Step 6: after three road DAC regulated and finish, superconducting quantum interference device (SQUID) 5 reached best operating point, and multi-channel A C6 gathers the output waveform of superconducting quantum interference device (SQUID) 5, sends single-chip microcomputer 1 back to, and the debugging of superconducting quantum interference device (SQUID) 5 is finished in single-chip microcomputer 1 this working point of locking.
Claims (3)
1. high-temperature superconducting magnetometer measure and control device that automatically locks the working point, it is characterized in that, be to be connected with sensing circuit (4) with triangular signal generator based (2) through multichannel DAC (3) respectively by single-chip microcomputer (1), sensing circuit (4) connects and composes with single-chip microcomputer (1) through superconducting quantum interference device (SQUID) (5), multi-channel A C (6).
2. according to the described high-temperature superconducting magnetometer measure and control device that automatically locks the working point of claim 1, it is characterized in that sensing circuit (4) is to feed back to directional coupler (7) by superconducting quantum interference device (SQUID) (5) through directional coupler (7), radio-frequency amplifier (8), frequency mixer (9), low-frequency amplifier (12) integrator (13) and feedback circuit (14) to constitute.
3. automatically lock the method for working point according to the described high-temperature superconducting magnetometer measure and control device that automatically locks the working point of claim 1, it is characterized in that, comprise following order and step:
A, single-chip microcomputer (1) control-signals generator (2) produce the standard triangular wave, and to sensing circuit (4) transmission triangular signal, superconducting quantum interference device (SQUID) (5) is debugged, outputting standard triangular wave field sweep current analog external magnetic field, single-chip microcomputer (1) control multichannel DAC (3) produces three road aanalogvoltages, be respectively tuning voltage, high-frequency level voltage and DC compensation voltage, be used for controlling the frequency of sensing circuit (4) medium-high frequency oscillator (10), the attenuation coefficient of attenuator (11) and the DC compensation of low-frequency amplifier (12);
B, passage one are regulated automatically: the frequency of the high frequency oscillator (10) of sensing circuit (4) lining is controlled and regulated to single-chip microcomputer (1) automatically, the signal that high frequency oscillator (10) produces is sent into superconducting quantum interference device (SQUID) (5), multi-channel A C (6) gathers the output waveform of superconducting quantum interference device (SQUID) (5), adjust the frequency of high frequency oscillator (10) according to the Automatic Frequency of output waveform, magnetic flux adjustment curve outside producing, superconducting quantum interference device (SQUID) this moment (5) is in resonant condition;
C, passage two are regulated automatically: the attenuation coefficient of the attenuator (11) of sensing circuit (4) lining is controlled and regulated to single-chip microcomputer (1) automatically, multi-channel A C (6) gathers superconducting quantum interference device (SQUID) (5) output waveform, automatically adjust the attenuation coefficient of attenuator (11) according to the amplitude of output waveform, when the amplitude of outer magnetic flux adjustment curve is maximum, output waveform reaches maximum signal to noise ratio, finishes attenuator (11) attenuation coefficient and regulates;
D, passage three are regulated automatically: the DC compensation of the low-frequency amplifier (12) of sensing circuit (4) lining is controlled and regulated to single-chip microcomputer automatically, multi-channel A C (6) gathers the output waveform of superconducting quantum interference device (SQUID) (5), automatically adjust the DC compensation of amplifier according to output waveform, when DC level is zero, finishes the DC compensation of low-frequency amplifier (12) and regulate;
After e, multichannel DAC (3) regulate and finish, superconducting quantum interference device (SQUID) (5) reaches best operating point, and multi-channel A C (6) gathers the output waveform of superconducting quantum interference device (SQUID) (5), sends single-chip microcomputer (1) back to, single-chip microcomputer (1) locks this working point, finishes superconducting quantum interference device (SQUID) (5) debugging.
F, single-chip microcomputer (1) are measured magnetic field, and multichannel DAC (6) gathers measurement data, and single-chip microcomputer (1) storage data also show the measurement magnetic field value.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744035A (en) * | 2014-01-25 | 2014-04-23 | 吉林大学 | Working point migrated counter-type superconducting magnetometer and method for determining magnetic field change direction |
| CN104569866A (en) * | 2013-10-14 | 2015-04-29 | 中国科学院上海微系统与信息技术研究所 | Temperature correction unit and correction method as well as applicable superconducting quantum interference sensor |
| CN105278396A (en) * | 2014-07-23 | 2016-01-27 | 中国科学院上海微系统与信息技术研究所 | Working point jump control method and system of wide-range SQUID magnetic sensor |
| CN105372612A (en) * | 2015-12-08 | 2016-03-02 | 清华大学 | Method for accurately diagnosing series SQUID faults |
| CN106526516A (en) * | 2016-08-24 | 2017-03-22 | 江西飞尚科技有限公司 | Calibration method of magnetic flux sensor acquisition instrument |
| CN108169697A (en) * | 2017-11-15 | 2018-06-15 | 深圳市君威科技有限公司 | A kind of high stable frequency automatic controller based on RF-SQUID applications |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2473670Y (en) * | 2001-01-16 | 2002-01-23 | 北京大学 | Automatic control interface device of superconductive quantum interferometer |
| CN2638073Y (en) * | 2003-07-15 | 2004-09-01 | 北京大学 | High temp superconducting radio-frequency quantum interference device system |
-
2011
- 2011-02-21 CN CN201110041653.0A patent/CN102175980B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2473670Y (en) * | 2001-01-16 | 2002-01-23 | 北京大学 | Automatic control interface device of superconductive quantum interferometer |
| CN2638073Y (en) * | 2003-07-15 | 2004-09-01 | 北京大学 | High temp superconducting radio-frequency quantum interference device system |
Non-Patent Citations (2)
| Title |
|---|
| 任胜男: "高温超导磁力仪测控装置研制", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 葛晓飞等: "多通道超导量子干涉仪的自动控制系统", 《稀有金属材料与工程》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569866A (en) * | 2013-10-14 | 2015-04-29 | 中国科学院上海微系统与信息技术研究所 | Temperature correction unit and correction method as well as applicable superconducting quantum interference sensor |
| CN103744035A (en) * | 2014-01-25 | 2014-04-23 | 吉林大学 | Working point migrated counter-type superconducting magnetometer and method for determining magnetic field change direction |
| CN103744035B (en) * | 2014-01-25 | 2017-02-15 | 吉林大学 | Working point migrated counter-type superconducting magnetometer and method for determining magnetic field change direction |
| CN105278396A (en) * | 2014-07-23 | 2016-01-27 | 中国科学院上海微系统与信息技术研究所 | Working point jump control method and system of wide-range SQUID magnetic sensor |
| CN105278396B (en) * | 2014-07-23 | 2018-04-03 | 中国科学院上海微系统与信息技术研究所 | The operating point saltus step control method and system of wide range SQUID Magnetic Sensors |
| CN105372612A (en) * | 2015-12-08 | 2016-03-02 | 清华大学 | Method for accurately diagnosing series SQUID faults |
| CN105372612B (en) * | 2015-12-08 | 2018-04-10 | 清华大学 | A kind of method of Precise Diagnosis series connection SQUID failures |
| CN106526516A (en) * | 2016-08-24 | 2017-03-22 | 江西飞尚科技有限公司 | Calibration method of magnetic flux sensor acquisition instrument |
| CN106526516B (en) * | 2016-08-24 | 2019-04-05 | 江西飞尚科技有限公司 | A kind of magnetic flux transducer Acquisition Instrument bearing calibration |
| CN108169697A (en) * | 2017-11-15 | 2018-06-15 | 深圳市君威科技有限公司 | A kind of high stable frequency automatic controller based on RF-SQUID applications |
| CN108169697B (en) * | 2017-11-15 | 2020-08-18 | 深圳市君威科技有限公司 | High-stability frequency automatic controller based on RF-SQUID application |
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