CN203217069U - High sensitivity helium optical pump gradient detector - Google Patents
High sensitivity helium optical pump gradient detector Download PDFInfo
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- CN203217069U CN203217069U CN 201320224456 CN201320224456U CN203217069U CN 203217069 U CN203217069 U CN 203217069U CN 201320224456 CN201320224456 CN 201320224456 CN 201320224456 U CN201320224456 U CN 201320224456U CN 203217069 U CN203217069 U CN 203217069U
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Abstract
The utility model relates to the field of magnetic exploration technology, and particularly discloses a high sensitivity helium optical pump gradient detector, which comprises a light source and helium optical pump probes, wherein the light source adopts a helium laser source, the amount of the helium optical pump probes is at least three, rear ends of the helium optical pump probes are electrically connected with a comprehensive processing circuit, a phase frequency automatic tracking circuit, a shaping and amplifying circuit and an output matching circuit in sequence; and the light source and one ends of the helium optical pump probes are electrically connected with a power supply and a high frequency oscillating circuit, one end of the phase frequency automatic tracking circuit is electrically connected with the helium optical pump probes, and the shaping and amplifying circuit is connected with a frequency meter. The high sensitivity helium optical pump gradient detector adopts a gradient measuring and frequency automatic tracking method, and is greatly improved in sensitivity, accuracy and earth exploring depth.
Description
Technical field
The utility model relates to the magnetic exploration technical field, relates in particular to a kind of highly sensitive helium optical pumping sniffer.
Background technology
Helium optical pumping magnetic survey instrument is to be based upon on the theoretical foundation of material atom " nuclear magnetic resonance " and progressively to improve, and constantly development develops the new Detection Techniques that form.Helium optical pumping nuclear magnetic resonance, as the term suggests be to utilize optical action and mr techniques, based on the Zeeman effect of helium atom energy level in magnetic field, utilize optical action to realize the optical orientation of helium atom, the method by the optical detection magnetic resonance realizes by the measurement of measuring magnetic field.Because helium optical pumping magnetic survey instrument adopts the detection method of light, survey the absorption of atom pair light quantum, rather than as the absorption of nuclear magnetic resonance direct detection atom pair radio frequency quantum, thereby improved detection sensitivity greatly, the multiple that improves is optical frequency and the ratio of radio frequency, is about 6 * 10
4It can and do characteristics such as quick continuous coverage with the low-intensity magnetic field of higher sensitivity measure 0.05～100nT under moving condition, since the sixties in 20th century, be used widely in fields such as geophysics, space physics, military engineering and biomagnetisms.
It is " magnetic resultant field " detection method that helium optical pumping of the prior art is surveyed, and this method fathoms shallow, and sensitivity and precision are all poor.Moreover, helium optical pumping magnetic survey instrument in the past, its total system magnetic survey scope is wideless, and when changes of magnetic field was big, the easy losing lock of tracing measurement system caused and loses tracking, problem such as need readjust.Along with the requirement of fields such as modern military technology, mineral reserve detection to the indexs such as precision, stability and speed of magnetic-field measurement, existing magnetic exploration system can not meet the demands.
The utility model content
The purpose of this utility model is, proposes a kind of highly sensitive helium optical pumping gradient detection instrument, and it adopts gradiometry and automatic frequency tracking mode, all obtains lifting by a relatively large margin on sensitivity, degree of accuracy and the spy ground degree of depth.
For achieving the above object, the utility model provides a kind of highly sensitive helium optical pumping gradient detection instrument, it comprises: light source and helium optical pumping probe, described light source adopts the helium lasing light emitter, helium optical pumping probe is at least three, and this helium optical pumping probe rear end also is electrically connected with overall treatment circuit, phase frequency automatic tracking circuit, shaping amplification circuit and output matching circuit successively; Described light source and helium optical pumping are popped one's head in, and an end is electrically connected with power supply and the radio-frequency voltage generator circuit of popping one's head in, and phase frequency automatic tracking circuit one end also electrically connects with helium optical pumping probe, and the phase frequency automatic tracking circuit is connected with a frequency meter.
Wherein, described helium optical pumping probe includes optical system and magnetic field absorption chamber, include the lens, polaroid, 1/4 wavelength sheet and the light activated element that are oppositely arranged with light source in this optical system, be wound with radio-frequency coil in the middle of this magnetic field absorption chamber, phase frequency automatic tracking circuit one end and this radio-frequency coil electrically connect.
Concrete, comprise photosensitive amplifier and the bandpass amplifier of electric connection in the described overall treatment circuit, this photosensitive amplifier one end electrically connects with light activated element, bandpass amplifier one end and the electric connection of phase frequency automatic tracking circuit.
In the utility model, the centre frequency of described bandpass amplifier is 1MHz.
Moreover, include by the signal generator centered by the 1MHz in the described phase frequency automatic tracking circuit, bandpass amplifier in this signal generator one end and the overall treatment circuit electrically connects, and the radio-frequency coil in the signal generator other end is also popped one's head in the helium optical pumping electrically connects.
Further, described output matching circuit is connected with external processing apparatus.
Optionally, described external processing apparatus can comprise computing machine, and output matching circuit electrically connects by cable and this computing machine.
Highly sensitive helium optical pumping gradient detection instrument of the present utility model, it introduces the helium laser technology, and the light-struck intensity of helium is improved greatly, and strength ratio improved 10 times originally; Moreover, it adds automatic frequency tracking technology in circuit, make the frequency signal of signal generator just change corresponding with the strong and weak variation of external field signal, can carry out from motion tracking, make one second sampling sensitivity reach 0.005nT, be doubled than original maximum sensitivity, avoided losing tracking simultaneously, problem such as readjust; In addition, it introduces the magnetic gradient measuring method, all is improved significantly on sensitivity and degree of accuracy and the spy ground degree of depth.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the theory diagram of a kind of specific embodiment of highly sensitive helium optical pumping gradient detection instrument in the utility model;
Fig. 2 is the theory diagram of a kind of specific embodiment of overall treatment circuit in the utility model;
Fig. 3 utilizes highly sensitive helium optical pumping gradient detection instrument of the present utility model to realize the method flow synoptic diagram of highly sensitive gradient detection.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of highly sensitive helium optical pumping gradient detection instrument, it comprises: light source and helium optical pumping probe 10, described light source adopts the helium lasing light emitter, helium optical pumping probe is at least three, and this helium optical pumping probe rear end also is electrically connected with overall treatment circuit 20, phase frequency automatic tracking circuit 30, shaping amplification circuit 40 and output matching circuit 50 successively; Described light source and helium optical pumping 10 1 ends of popping one's head in are electrically connected with power supply and high-frequency oscillating circuits 12, and phase frequency automatic tracking circuit 30 1 ends also electrically connect with helium optical pumping probe, and described shaping amplification circuit 40 also is connected with a frequency meter 42.The utility model is popped one's head at the helium optical pumping has increased the exposure intensity of helium lamp, introduces the helium laser technology, and the light-struck intensity of helium is improved greatly, and strength ratio improved 10 times originally; Simultaneously, add automatic frequency tracking technology in its circuit, the frequency signal that phase frequency automatic tracking circuit 30 is produced just changes corresponding with the strong and weak variation of external field signal, can carry out from motion tracking.One second sampling sensitivity of highly sensitive helium optical pumping gradient detection instrument in the utility model reaches 0.005nT, is doubled than original maximum sensitivity, has avoided losing tracking simultaneously, problem such as readjusts.
In the utility model, described helium optical pumping probe includes optical system and magnetic field absorption chamber, include the lens, polaroid, 1/4 wavelength sheet and the light activated element that are oppositely arranged with light source in this optical system, be wound with radio-frequency coil (not shown) in the middle of this magnetic field absorption chamber, phase frequency automatic tracking circuit 30 1 ends and this radio-frequency coil electrically connect.Helium laser illuminating optical system forms a circularly polarized light, by the magnetic field absorption chamber of being made up of helium, produces optical action, and the light scioptics of optical action focus on the light activated element.Described radio-frequency coil feedback has phase frequency automatic tracking circuit 30, is following the tracks of the radio-frequency voltage of changes of magnetic field everywhere.Described power supply and high-frequency oscillating circuits 12 are popped one's head in for the power supply of helium lasing light emitter and for the helium optical pumping radio-frequency voltage are provided.In the utility model specific embodiment, for helium lasing light emitter power supply be near kilovolt high-voltage power supply, otherwise can not produce laser, the power of preferred helium lasing light emitter is 5W in the utility model, voltage is that 700V is to 1000V; The radio-frequency voltage frequency that provides for helium optical pumping probe is about 16MHz, is used for the excitation field absorption chamber and lights.
In the utility model, described helium laser at photosignal that light converts to of light activated element output, is sent this photosignal into overall treatment circuit 20 after handling by the optical system of helium optical pumping probe.As shown in Figure 2, the photosensitive amplifier 22 of integrated form and the integrated form bandpass amplifier 24 that comprise electric connection in this overall treatment circuit 20, these photosensitive amplifier 22 1 ends and light activated element electrically connect, and bandpass amplifier 24 1 ends and phase frequency automatic tracking circuit 30 electrically connect.This photosensitive amplifier 22 is used for that photosignal is carried out linearity and amplifies, and the photosignal after the amplification enters bandpass amplifier 24.The centre frequency that requires this bandpass amplifier 24 is 1MHz, and the signal that surpasses 2MHz is prevented from.
Signal by bandpass amplifier 24 enters phase frequency automatic tracking circuit 30.Include in this phase frequency automatic tracking circuit 30 by the signal generator centered by the 1MHz (not shown), bandpass amplifier 24 in this signal generator one end and the overall treatment circuit 20 electrically connects, and the radio-frequency coil in the signal generator other end is also popped one's head in the helium optical pumping electrically connects.This signal generator can be in the 0.75MHz-1.5MHz frequency sweep.Swept-frequency signal also will feed back on the radio-frequency coil of helium optical pumping probe, and purpose is to produce nuclear magnetic resonance.The corresponding magnetic field intensity signal of frequency sweep frequency signal during resonance, when frequency was high, corresponding magnetic field intensity was strong, the weak strength in corresponding magnetic field when frequency is low, when change of magnetic field strength, frequency is being followed one and is being changed, and has finished from motion tracking thus.
In the utility model, behind the alternative frequency signal process shaping amplification circuit 40 by phase frequency automatic tracking circuit 30, can be connected on the frequency meter 42, be used for the situation by the frequency analysis changes of magnetic field.Perhaps, as another kind of selectivity embodiment of the present utility model, described output matching circuit 50 can connect any external processing apparatus 60.The pulse signal that described alternative frequency signal by phase frequency automatic tracking circuit 30 obtains being fit to through shaping amplification circuit 40 is connected to any external processing apparatus 60 and signal is not attenuated through output matching circuit 50.As specific embodiment of the utility model, prestore the frequency PaintShop in this external processing apparatus 60, this external processing apparatus 60 can include but are not limited to computing machine, output matching circuit 50 electrically connects by cable and this computing machine (not shown), show magnetic field intensity by the frequency PaintShop, or the Distribution of Magnetic Field in certain place.
Further, as shown in Figure 3, realize the method for highly sensitive gradient detection for utilizing the highly sensitive helium optical pumping of the utility model gradient detection instrument, it comprises the steps:
Step a provides the helium lasing light emitter, and places helium optical pumping probe at least three diverse locations of target to be measured.In the utility model, employing helium lasing light emitter has replaced the helium lamp of original detection instrument, has improved the exposure intensity of helium light greatly, and strength ratio improved 10 times originally.In the utility model for helium lasing light emitter power supply be near kilovolt high-voltage power supply, otherwise can not produce laser.As a kind of specific embodiment of the present utility model, the power of helium lasing light emitter is 5W, and voltage is that 700V is to 1000V.It is " magnetic resultant field " detection method that helium optical pumping of the prior art is surveyed, and it fathoms, sensitivity and precision are all relatively poor.And introduced the magnetic gradient measuring method in the utility model, and namely place three probes three different suitable positions at least, be the concept on space rather than plane, on sensitivity and degree of accuracy and the spy ground degree of depth, all be better than original measuring method like this.
Step b, helium laser export the photosignal that light converts to after handling by helium optical pumping probe, enter overall treatment circuit 20.As a kind of specific embodiment of the present utility model, described helium optical pumping probe is made up of optical system and magnetic field absorption chamber, optical system is made up of lens, polaroid and 1/4 wavelength sheet and light activated element, helium laser illuminating optical system, form a circularly polarized light, by the magnetic field absorption chamber of being formed by helium, produce optical action, the light scioptics of optical action focus on the light activated element.Be wound with radio-frequency coil in the middle of the absorption chamber of described magnetic field, feedback has the radiofrequency signal from the variation of phase frequency automatic tracking circuit 30, is following the tracks of the radio-frequency voltage of changes of magnetic field everywhere.Described helium optical pumping probe place also is added with the radio-frequency voltage of being sent by high-frequency oscillating circuits, and its frequency is about 16MHz, and peak value reaches more than the 20V, is used for the excitation field absorption chamber and lights.
Step c, the photosignal of 20 pairs of inputs of overall treatment circuit carry out linearity and amplify, and the signal that surpasses 2MHz is filtered, and the signal less than 2MHz after the filtration enters phase frequency automatic tracking circuit 30.Helium laser at photosignal that light converts to of light activated element output, enters overall treatment circuit 20 after handling by the optical system of helium optical pumping probe.The photosensitive amplifier 22 of integrated form and the integrated form bandpass amplifier 24 that comprise electric connection in the overall treatment circuit 20 in the utility model, the photosignal of input is amplified into bandpass amplifier 24 through photosensitive amplifier 22 linearities, the centre frequency of this bandpass amplifier 24 is 1MHz, the signal that surpasses 2MHz is prevented from, by the signal of bandpass amplifier 24, enter phase frequency automatic tracking circuit 30.The utility model amplifies photosignal linearly for making photosensitive amplifier 22, requires this photosensitive amplifier 22 to be in zero bias condition for light activated element.
Steps d, phase frequency automatic tracking circuit 30 are in the 0.75MHz-1.5MHz frequency sweep, and swept-frequency signal also will feed back to helium optical pumping probe place, thereby produce nuclear magnetic resonance, realize automatic frequency tracking.Include by the signal generator centered by the 1MHz in the phase frequency automatic tracking circuit 30 in the utility model, this signal generator can be to the signal by bandpass amplifier in the 0.75MHz-1.5MHz frequency sweep.This swept-frequency signal also will feed back on the radio-frequency coil of helium optical pumping probe, and purpose is to produce nuclear magnetic resonance.The corresponding magnetic field intensity signal of frequency sweep frequency signal during resonance, when frequency was high, corresponding magnetic field intensity was strong, the weak strength in corresponding magnetic field when frequency is low, when change of magnetic field strength, frequency is being followed one and is being changed, and has finished from motion tracking thus.
Step e, the alternative frequency signal by phase frequency automatic tracking circuit 30 is connected on the frequency meter 42 through shaping amplification circuit 40, is used for the situation by the frequency analysis changes of magnetic field; Perhaps, this alternative frequency signal is connected to external processing apparatus 60 after passing through shaping amplification circuit and an output matching circuit successively, shows magnetic field intensity or Distribution of Magnetic Field by the frequency PaintShop that is pre-stored in the external processing apparatus 60.In the utility model, the pulse signal that the alternative frequency signal by phase frequency automatic tracking circuit 30 obtains being fit to through shaping amplification circuit 40, this pulse signal is used for the situation by frequency number word analysis changes of magnetic field to be connected on the frequency meter 42.Perhaps, as another kind of selectivity embodiment of the present utility model, alternative frequency signal by phase frequency automatic tracking circuit 30 passes through the pulse signal that shaping amplification circuit 40 obtains being fit to, also can be through output matching circuit 50, these output matching circuit 50 purposes are to be connected to any external processing apparatus 60 and signal is not attenuated.As a kind of specific embodiment of the present utility model, this pulse signal is through behind the input matching circuit 50, can be connected to a computing machine place by a cable, by being pre-stored in the frequency PaintShop in the computing machine, show the Distribution of Magnetic Field at magnetic field intensity or target to be measured place.
In sum, highly sensitive helium optical pumping gradient detection instrument of the present utility model, it changes the irradiation of helium laser into by the irradiates light of helium optical pumping probe being gone up helium lamp, and in circuit, add the automatic frequency tracking technology, phase-locked to the phase place of signal, to final stable suitable frequency pulse that signal is become, make one second sampling sensitivity of the utility model reach 0.005nT, increased by one times than original maximum sensitivity, avoided losing tracking simultaneously, the problem of readjusting.Helium optical pumping gradient detection instrument of the present utility model can with some ripe equipment as three axis fluxgate magnetometers, GPS navigation orientator, altitude gauge, take photo by plane instrument, aircraft Disturbance Compensation System etc. synchronously, be input to computing machine, process software by special figure, scan the Distribution of Magnetic Field of earth diverse location, can analyze various materials underground or that exist under water, as artifact, weapon, submarine or mineral reserve etc.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. highly sensitive helium optical pumping gradient detection instrument, comprise light source and helium optical pumping probe, it is characterized in that, described light source adopts the helium lasing light emitter, helium optical pumping probe is at least three, and this helium optical pumping probe rear end also is electrically connected with overall treatment circuit, phase frequency automatic tracking circuit, shaping amplification circuit and output matching circuit successively; Described light source and helium optical pumping are popped one's head in, and an end is electrically connected with power supply and the radio-frequency voltage generator circuit of popping one's head in, and phase frequency automatic tracking circuit one end also electrically connects with helium optical pumping probe, and the phase frequency automatic tracking circuit is connected with a frequency meter.
2. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 1, it is characterized in that, described helium optical pumping probe includes optical system and magnetic field absorption chamber, include the lens, polaroid, 1/4 wavelength sheet and the light activated element that are oppositely arranged with light source in this optical system, be wound with radio-frequency coil in the middle of this magnetic field absorption chamber, phase frequency automatic tracking circuit one end and this radio-frequency coil electrically connect.
3. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 2, it is characterized in that, the photosensitive amplifier and the bandpass amplifier that comprise electric connection in the described overall treatment circuit, this photosensitive amplifier one end and light activated element electrically connect, and bandpass amplifier one end and phase frequency automatic tracking circuit electrically connect.
4. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 3 is characterized in that the centre frequency of described bandpass amplifier is 1MHz.
5. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 4, it is characterized in that, include by the signal generator centered by the 1MHz in the described phase frequency automatic tracking circuit, bandpass amplifier in this signal generator one end and the overall treatment circuit electrically connects, and the radio-frequency coil in the signal generator other end is also popped one's head in the helium optical pumping electrically connects.
6. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 1 is characterized in that described output matching circuit is connected with external processing apparatus.
7. highly sensitive helium optical pumping gradient detection instrument as claimed in claim 6 is characterized in that described external processing apparatus comprises computing machine, and output matching circuit electrically connects by cable and this computing machine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320224456 CN203217069U (en) | 2013-04-27 | 2013-04-27 | High sensitivity helium optical pump gradient detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320224456 CN203217069U (en) | 2013-04-27 | 2013-04-27 | High sensitivity helium optical pump gradient detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257329A (en) * | 2013-04-27 | 2013-08-21 | 西安电子科大赛福电子技术有限责任公司 | Helium light pump gradient detector and method for achieving high-sensitivity gradient detection |
| CN103823245A (en) * | 2013-12-27 | 2014-05-28 | 杭州瑞声海洋仪器有限公司 | Omnidirectional helium optical pumping magnetic force instrument |
| CN104316969A (en) * | 2014-10-11 | 2015-01-28 | 中国船舶重工集团公司第七一五研究所 | Intelligent digital helium optically-pumped magnetometer |
-
2013
- 2013-04-27 CN CN 201320224456 patent/CN203217069U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257329A (en) * | 2013-04-27 | 2013-08-21 | 西安电子科大赛福电子技术有限责任公司 | Helium light pump gradient detector and method for achieving high-sensitivity gradient detection |
| CN103257329B (en) * | 2013-04-27 | 2015-06-24 | 西安电子科大赛福电子技术有限责任公司 | Helium light pump gradient detector and method for achieving high-sensitivity gradient detection |
| CN103823245A (en) * | 2013-12-27 | 2014-05-28 | 杭州瑞声海洋仪器有限公司 | Omnidirectional helium optical pumping magnetic force instrument |
| CN104316969A (en) * | 2014-10-11 | 2015-01-28 | 中国船舶重工集团公司第七一五研究所 | Intelligent digital helium optically-pumped magnetometer |
| CN104316969B (en) * | 2014-10-11 | 2017-01-25 | 中国船舶重工集团公司第七一五研究所 | Intelligent digital helium optically-pumped magnetometer |
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Granted publication date: 20130925 Effective date of abandoning: 20150624 |
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