CN105180916B - A kind of detection method of SERF atomic spins gyroscope atomic spin precession - Google Patents
A kind of detection method of SERF atomic spins gyroscope atomic spin precession Download PDFInfo
- Publication number
- CN105180916B CN105180916B CN201510679672.4A CN201510679672A CN105180916B CN 105180916 B CN105180916 B CN 105180916B CN 201510679672 A CN201510679672 A CN 201510679672A CN 105180916 B CN105180916 B CN 105180916B
- Authority
- CN
- China
- Prior art keywords
- atomic
- serf
- atomic spin
- detection method
- slide
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The present invention proposes a kind of detection method of SERF atomic spins gyroscope atomic spin precession, and atomic spin precession is detected by dual-beam closed loop Electro-optical Modulation detection method.The precession of atomic spin can be caused under the input of extraneous angular speed by realizing the atom of spin SERF states.Method proposed by the present invention is to extract the angular rate information that atomic spin is carried by the interaction of linearly polarized light and atomic spin precession, so as to realize the measurement to angular speed.Detection method proposed by the present invention can not only be effectively isolated the influence of the constant multipliers such as light intensity, modulation amplitude, influence of the error present in practical application to detecting system precision can also be isolated in principle, therefore with higher sensitivity, so as to be effectively improved the measurement accuracy of SERF atomic spin gyroscopes on the whole.
Description
Technical field
The present invention relates to a kind of detection method of SERF atomic spins gyroscope atomic spin precession, belong to Photoelectric Detection skill
Art field.
Background technology
Spin is the intrinsic attribute of material, and atomic spin is made up of electron spin with nuclear spin.Atomic spin has angular motion
Amount, for an atomic spin assemblage, the synthesis of these angular momentums has in gyroscopic inertia, with rotor gyro in inertial space
Gyroscopic inertia of the high speed rotor in inertial space it is similar.Therefore, the measurement of angular movement can be carried out using atomic spin.2005
Year, the researcher of Princeton College Physics system has chanced on a kind of new atomic spin gyroscope, utilizesThe sensitive volume of spheroid realizes 2 × 10-3°/h1/2Random walk, 4 × 10-2°/h drift.By theory analysis,
By technological improvement under same sensitive volume, the performance of the atomic spin gyroscope will can obtain the raising of the order of magnitude, table
The characteristics of this bright new atomic spin gyroscope has superhigh precision, small size.The gyroscope fully utilizes alkali metal
The electron spin of atom and the nuclear spin of inert gas, the electron spin by manipulating alkali metal atom work in no spin-exchange
Relaxation (SpinExchangeRelaxationFree-SERF) state, the nuclear spin of intert-gas atoms and the electricity of alkali metal atom
Son spin close coupling, carries out the measurement of angular movement, is referred to as atomic spin gyroscope or SERF atomic spin gyros based on SERF
Instrument.
The precession of atomic spin can be caused under the input of extraneous angular speed by realizing the atom of spin SERF states, inclined by line
The light that shakes extracts the angular rate information of atomic spin carrying with the interaction of atomic spin precession, so as to realize to angular speed
Measurement.Therefore, the detection method of SERF atomic spins gyroscope atomic spin precession turns into one of key technology.Atomic spin is entered
Dynamic detection may finally be mapped as the plane of polarization roll angle inspection that linear polarization detects laser.At present, it is former for ultra-high sensitive SERF
The linearly polarized light angle detection method of sub- spin gyroscope, SERF atom magnetometers, it is main to include three kinds：Differential polarization method, method
Draw modulation method and electro-optic modulation method.
Differential polarization method is due to lacking modulating action, when atom to be measured Spin precession angle is low frequency signal, detecting system
The noise such as 1/f it is larger, the noise of system is poor.Although Faraday modulation method has highly sensitive advantage, while also band
Having carried out constant multiplier needs the difficult point such as precise and stable, and the modulation amplitude that Faraday modulation device is produced is to use power amplifier
By current load on Faraday modulation coil, faraday's crystal is driven to obtain by alternating magnetic field.This method causes detection
Higher temperature and larger magnetic field are produced in loop, the accurate control to temperature and magnetic field brings difficulty.Electro-optic modulation method with
Faraday modulation method is similar, and Faraday modulation is replaced using Electro-optical Modulation, and light intensity and modulated amplitude are still included in system output
These constant multipliers are spent, it is necessary to carry out accurate closed-loop control to improve the precision of detecting system to them.But, Electro-optical Modulation
The modulation amplitude that device is produced is carried on electro-optic crystal by the output voltage of voltage amplifier to be obtained so that electrooptic modulator phase
Than not producing higher temperature and larger magnetic field additionally in Faraday modulation device.In addition, also exist in actual applications
Following error：The optical axis mutual alignment of the polarizer and analyzer is influenceed and drifted about by mechanical deformation etc., there is non-normal angle, fixed
Justice is γ；The magneto-optic effect of optical element can produce error corner, be defined as ε；The disturbance of air-flow, the change of temperature can change inspection
Air refraction near light-metering road, causes the plane of polarization of linearly polarized light to rotate, is defined as τ.
The content of the invention
The invention aims to the deficiency for solving above-mentioned three kinds of detection methods, there is provided a kind of SERF atomic spins gyro
The detection method of instrument atomic spin precession, this method use dual-beam closed loop electro-optical modulation detection method, not only can effectively every
From the influence of above-mentioned constant multiplier, moreover it is possible to isolate influence of the above-mentioned error to detecting system precision in principle.
The technical solution adopted by the present invention is：A kind of detection method of SERF atomic spins gyroscope atomic spin precession,
Comprise the following steps：
(1) detection laser is divided into the two-beam of exiting parallel by beam splitter and speculum, after the same polarizer,
Initial beam intensity is respectively Io1And Io2；
(2) this two beam detection laser is by same 1/4 slide and electrooptic modulator, the modulator by lock-in amplifier and
Voltage amplifier drives, and modulating frequency is that ω, modulation amplitude are A；
A branch of incident alkali metal air chamber in (3) two beams detection laser, corner is produced with atomic spin precession interaction
θ, another Shu Buyu alkali metal air chamber is had an effect；
(4) after step (3), two beams detection laser passes through same 1/4 slide and closed loop electric light actuator, the actuator
Corner α is produced to two beams detection laser1；
(5) obtained by the detection laser of alkali metal air chamber separately through second 1/4 slide and closed loop electric light actuator
Corner α2；
(6) analyzing of signal is carried out using same analyzer, laser is detected through two beams of analyzer, respectively by two
Photodetector, which absorbs, obtains light intensity I1And I2；
(7) lock-in amplifier demodulates above-mentioned signal and respectively obtains Iω1And Iω2；
(8) PID controller 1 and PID controller 2 is respectively adopted to Iω1And Iω2Closed-loop control is carried out, makes these parameters all the time
Remain zero；The control angle [alpha] obtained by PID controller 22, the as final output of detecting system.
Preferably, the modulation amplitude that the electrooptic modulator is produced is carried in electricity by the output voltage of voltage amplifier
Obtained on luminescent crystal so that electrooptic modulator does not produce higher temperature and larger magnetic field additionally.Therefore, Electro-optical Modulation is detected
Method reduce system realize complexity and control difficulty, be conducive to the integration and miniaturization of system.
Preferably, the electrooptic modulator selects the less Electrooptic crystal material of extinction ratio.The extinction ratio of electro-optic crystal
Constant value biasing can be introduced, and is proportional to the size of extinction ratio, when constant value biasing is smaller to the measurement range of photodetector
Influence is very little, it is ensured that the sensitivity of photodetector.
Beneficial effect：The present invention detects SERF atomic spin gyroscopes by dual-beam closed loop electro-optical modulation detection method
Atomic spin precession, can not only be effectively isolated the influence of constant multiplier, moreover it is possible to isolate in principle present in practical application
Influence of the error to detecting system precision.Therefore the detection method has higher sensitivity, can effectively carry on the whole
The measurement accuracy of high SERF atomic spins gyroscope.
Brief description of the drawings
Fig. 1 is the General Principle schematic diagram of SERF atomic spin gyroscopes；
Fig. 2 is dual-beam closed loop Electro-optical Modulation detection method principle schematic；
Fig. 3 is the SERF atomic spin gyroscopes experimental provision signal based on dual-beam closed loop Electro-optical Modulation detection method
Figure.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Fig. 1 is the General Principle schematic diagram of SERF atomic spin gyroscopes.Pumping light is former along Z-direction polarization alkali metal
Son, the caused atomic spin precession under the input of y-axis direction angular speed along the detection laser detection atom of X-axis.That is SERF is former
The sensitive axes of sub- spin gyroscope are vertical drive and the direction of detection laser plane.
A kind of detection method of SERF atomic spins gyroscope atomic spin precession proposed by the present invention, its Cleaning Principle shows
Be intended to as shown in Fig. 2 it is main by the polarizer, analyzer, 1/4 slide and electrooptic modulator, photodetector, lock-in amplifier,
Voltage amplifier, PID controller etc. are constituted.
First, detection laser is divided into the two-beam of exiting parallel by beam splitter and speculum, passes through the same polarizer
Afterwards, initial beam intensity is respectively Io1And Io2；This two beam detection laser passes through same 1/4 slide and electrooptic modulator, the modulator
Driven by lock-in amplifier and voltage amplifier, modulating frequency is that ω, modulation amplitude are A；Two beams detection laser in it is a branch of enter
Alkali metal air chamber is penetrated, rotational angle theta is produced with atomic spin precession interaction, another Shu Buyu alkali metal air chamber is had an effect；It
Afterwards, two beams detection laser is by same 1/4 slide and closed loop electric light actuator, and the actuator is produced to two beams detection laser to be turned
Angle α1；By the detection laser of alkali metal air chamber separately through second 1/4 slide and closed loop electric light actuator, corner α is obtained2；
The analyzing of signal is carried out using same analyzer, laser is detected through two beams of analyzer, respectively by two photodetectors
Absorption obtains light intensity I1And I2；
Work as α1+γ+ε+τ、θ+α1+α2When+γ+ε+τ and A amplitude is smaller, formula (1) can be reduced to：
Demodulated by the signal of lock-in amplifier, in the output signal I that can extract photodetector, frequency is ω width
It is worth size：
The I that lock-in amplifier is exportedωSignal inputs PID controller, so that turn for controlling closed loop electric light actuator to produce
Angle α.In formula (3), IωIt is the linear function of a zero crossing on α.Therefore, corner α is controlled by PID controller, makes lock
The output I of phase amplifierωRemain zero.The output expression formula for obtaining two PID controllers is respectively：
By the α in formula (4)1Bring α into2, now, the corner α that rotational angle theta to be measured is produced by closed loop electric light actuator2Read,
I.e.：
α2=-θ (5)
The formula is the obtained atomic spin precession signal of detecting system.It can see from formula (5), output result
It is only relevant with angle measurement θ, and and I0, the drift such as A, γ, ε, τ it is no longer related, so as to isolate the drift of above-mentioned parameter in principle
Move the influence to detecting system precision.
Fig. 3 is the SERF atomic spin gyroscopes experimental provision signal based on dual-beam closed loop Electro-optical Modulation detection method
Figure.It is main to be made up of alkali metal air chamber, heating air chamber, magnetic shielding barrel, magnetic compensation coil, optical pumping beam and light detection beam.Alkali gold
Belong to air chamber as being heated in the stove without magnetic by thermal current (or electric current), heating furnace periphery is three-dimensional active magnetic bucking coil, dress
Put and realize magnetic screen by four layers of cylindrical magnetic shielding barrel.Pumping laser is along Z-direction, and detection laser is quick along X-direction
Feel the angular speed of Y-axis.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention is not limited to described reality
Apply mode.For one of ordinary skill in the art, in the range of the principle and technological thought of the present invention, to these implementations
Mode carries out a variety of changes of embodiment progress, modification, replacement and deformation and still fallen within protection scope of the present invention.
Claims (3)
1. a kind of detection method of SERF atomic spins gyroscope atomic spin precession, it is characterised in that：Comprise the following steps：
(1) detection laser is divided into the two-beam of exiting parallel by beam splitter and speculum, after the same polarizer, initially
Light intensity is respectively I01And I02；
(2) this two beam detection laser is by same one 1/4 slide and electrooptic modulator, the modulator by lock-in amplifier and
Voltage amplifier drives, and modulating frequency is that ω, modulation amplitude are A；
A branch of incident alkali metal air chamber in (3) two beams detection laser, produces rotational angle theta, separately with atomic spin precession interaction
It is a branch of not had an effect with alkali metal air chamber；
(4) after step (3), two beams detection laser passes through same 2nd 1/4 slide and the first closed loop electric light actuator, second
1/4 slide is identical with the one 1/4 slide, and the actuator produces corner α to two beams detection laser1；
(5) by the detection laser of alkali metal air chamber separately through the 3rd 1/4 slide and the second closed loop electric light actuator, the 3rd 1/
4 slides are identical with the one 1/4 slide, the 2nd 1/4 slide, obtain corner α2；
(6) analyzing of signal is carried out using same analyzer, laser is detected through two beams of analyzer, respectively by two photoelectricity
Detector, which absorbs, obtains light intensity I1And I2；
(7) lock-in amplifier demodulates above-mentioned signal and respectively obtains Iω1And Iω2；
(8) PID controller 1 and PID controller 2 is respectively adopted to Iω1And Iω2Closed-loop control is carried out, makes Iω1And Iω2Parameter is all the time
Remain zero；The control angle [alpha] obtained by PID controller 22, control angle [alpha]2For the final output of detecting system.
2. a kind of detection method of SERF atomic spins gyroscope atomic spin precession according to claim 1, its feature
It is：The modulation amplitude that the electrooptic modulator is produced is carried on electro-optic crystal by the output voltage of voltage amplifier and obtained
Arrive so that electrooptic modulator does not produce higher temperature and larger magnetic field additionally.
3. a kind of detection method of SERF atomic spins gyroscope atomic spin precession according to claim 1, its feature
It is：The electrooptic modulator selects the less Electrooptic crystal material of extinction ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510679672.4A CN105180916B (en) | 2015-10-19 | 2015-10-19 | A kind of detection method of SERF atomic spins gyroscope atomic spin precession |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510679672.4A CN105180916B (en) | 2015-10-19 | 2015-10-19 | A kind of detection method of SERF atomic spins gyroscope atomic spin precession |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105180916A CN105180916A (en) | 2015-12-23 |
| CN105180916B true CN105180916B (en) | 2017-11-07 |
Family
ID=54903167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510679672.4A Active CN105180916B (en) | 2015-10-19 | 2015-10-19 | A kind of detection method of SERF atomic spins gyroscope atomic spin precession |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105180916B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509725B (en) * | 2016-03-08 | 2019-05-21 | 中国航空工业第六一八研究所 | A kind of miniaturization magnetic resonance gyroscope instrument |
| CN106093808B (en) * | 2016-06-27 | 2018-11-09 | 北京航空航天大学 | A kind of atomic spin precession detection method and device based on Electro-optical Modulation |
| CN106385283B (en) * | 2016-09-20 | 2019-04-26 | 北京航空航天大学 | A kind of pumping light modulation demodulation system and method applied to atomic spin precession detection |
| CN107643615B (en) * | 2017-09-30 | 2020-08-07 | 北京航空航天大学 | Full light path light intensity stability control system of SERF atomic spin gyro |
| CN107843247B (en) * | 2017-10-20 | 2021-04-20 | 北京航空航天大学 | Small-size integrated double-shaft spin-exchange-free relaxation gyroscope structure |
| CN109059892B (en) * | 2018-09-04 | 2020-07-07 | 中国人民解放军国防科技大学 | Photon suspension gyroscope based on double-beam optical trap system |
| CN109186579B (en) * | 2018-11-02 | 2022-04-22 | 北京航空航天大学 | Portable spin-exchange-relaxation-free atomic gyroscope structure |
| CN109737945B (en) * | 2019-01-31 | 2021-04-13 | 北京航天控制仪器研究所 | Dual-wave-plate coupling detection light modulation detection system and method for SERF gyroscope |
| CN110631955B (en) * | 2019-10-29 | 2022-01-25 | 之江实验室 | Integrated alkali metal gas density detection device based on Faraday effect |
| CN112379319B (en) * | 2020-11-18 | 2023-01-10 | 北京自动化控制设备研究所 | Course error testing device for atomic magnetometer |
| CN112857354B (en) * | 2021-01-08 | 2022-10-25 | 中国船舶重工集团公司第七0七研究所 | High-stability Faraday modulator for SERF gyroscope |
| CN113091723B (en) * | 2021-03-23 | 2022-09-09 | 北京自动化控制设备研究所 | High-sensitivity atomic spin precession detection method and device based on optical field modulation |
| CN114543783B (en) * | 2022-01-20 | 2024-02-23 | 中国船舶重工集团公司第七0七研究所 | Double-penetrating detection system and detection method for SERF gyroscope |
| CN115265512B (en) * | 2022-07-28 | 2024-04-09 | 北京航空航天大学 | Rotation modulation method for SERF atomic spin gyroscope |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914298A (en) * | 2012-10-18 | 2013-02-06 | 北京航空航天大学 | Fullerene molecular gyroscope |
| CN102928082A (en) * | 2012-11-06 | 2013-02-13 | 北京航空航天大学 | Faraday detection method for removing modulation amplitude and light-intensity variation influences |
| CN103162836A (en) * | 2013-03-15 | 2013-06-19 | 北京航空航天大学 | Device and method for detecting optical interference of light polarization tiny corner |
| CN103438877A (en) * | 2013-09-02 | 2013-12-11 | 北京航空航天大学 | Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect |
| CN104457728A (en) * | 2014-11-20 | 2015-03-25 | 北京航空航天大学 | Spin-exchange relaxation-free atomic gyroscope device |
| CN104833690A (en) * | 2015-06-04 | 2015-08-12 | 中国人民解放军国防科学技术大学 | Method for measuring alkali metal atomic polarizability of nuclear magnetic resonance gyro in real time |
-
2015
- 2015-10-19 CN CN201510679672.4A patent/CN105180916B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914298A (en) * | 2012-10-18 | 2013-02-06 | 北京航空航天大学 | Fullerene molecular gyroscope |
| CN102928082A (en) * | 2012-11-06 | 2013-02-13 | 北京航空航天大学 | Faraday detection method for removing modulation amplitude and light-intensity variation influences |
| CN103162836A (en) * | 2013-03-15 | 2013-06-19 | 北京航空航天大学 | Device and method for detecting optical interference of light polarization tiny corner |
| CN103438877A (en) * | 2013-09-02 | 2013-12-11 | 北京航空航天大学 | Inertia and magnetic field integration measuring method based on SERF (spin-exchange-relaxation-free) atomic spin effect |
| CN104457728A (en) * | 2014-11-20 | 2015-03-25 | 北京航空航天大学 | Spin-exchange relaxation-free atomic gyroscope device |
| CN104833690A (en) * | 2015-06-04 | 2015-08-12 | 中国人民解放军国防科学技术大学 | Method for measuring alkali metal atomic polarizability of nuclear magnetic resonance gyro in real time |
Non-Patent Citations (3)
| Title |
|---|
| 原子磁强计检测光闭环稳定系统设计;王浩等;《传感器与微系统》;20141231;第33卷(第3期);82-84,88 * |
| 原子自旋SERF磁强计的主动磁补偿实验研究;楚中毅等;《高分辨率对地观测学术年会》;20131231;1-12 * |
| 原子自旋磁强计磁屏蔽筒参数优化设计;张红等;《东南大学学报（自然科学版）》;20141130;第44卷(第6期);1177-1180 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105180916A (en) | 2015-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105180916B (en) | A kind of detection method of SERF atomic spins gyroscope atomic spin precession | |
| CN105589048B (en) | Magnetic field measuring method and magnetic field measuring device | |
| Jiang et al. | A parametrically modulated dual-axis atomic spin gyroscope | |
| CN107515000B (en) | A kind of modulation system twin shaft atomic spin gyroscope | |
| CN106093808B (en) | A kind of atomic spin precession detection method and device based on Electro-optical Modulation | |
| CN103438877B (en) | A kind of inertia based on SERF atomic spin effect and magnetic field integral measurement method | |
| CN104833690B (en) | A kind of atom magnetic resonance gyroscope alkali metal atom polarizability method for real-time measurement | |
| CN103412268B (en) | A kind of single beam unmasked atom magnetometer and detection method thereof | |
| CN107394576B (en) | A kind of atom magnetometer detection light frequency measurement based on second harmonic and stabilising arrangement and method | |
| JP5972006B2 (en) | Optical pumping magnetometer and magnetic force measuring method | |
| CN102914298B (en) | Fullerene molecular gyroscope | |
| CN105929458A (en) | Aeromagnetic field vector detecting device and detecting method | |
| Li et al. | Influence of magnetic fields on the bias stability of atomic gyroscope operated in spin-exchange relaxation-free regime | |
| CN110411433A (en) | A kind of atomic spin gyroscope detection light power error suppressing method based on field compensation | |
| CN105891744A (en) | Spatially resolved magneto-optic Kerr effect measurement device | |
| CN110631571A (en) | Double-shaft spin-exchange-free relaxation gyroscope and signal detection closed-loop control method | |
| Narayana et al. | Superfluid quantum interference in multiple-turn reciprocal geometry | |
| CN106996775A (en) | Regenerative system of controlling oneself and the self-holding renovation process of Larmor precession | |
| CN106871888A (en) | A kind of cold atom Bose Einstein condenses the method for detecting phases of vortex superposition state gyro | |
| Jiang et al. | Techniques for measuring transverse relaxation time of xenon atoms in nuclear-magnetic-resonance gyroscopes and pump-light influence mechanism | |
| Jiang et al. | A single-beam dual-axis atomic spin comagnetometer for rotation sensing | |
| Fu et al. | Effects of probe laser intensity on co-magnetometer operated in spin-exchange relaxation-free regime | |
| Zhao et al. | A non-modulated triaxial magnetic field compensation method for spin-exchange relaxation-free magnetometer based on zero-field resonance | |
| Liang et al. | Biaxial signal decoupling method for the longitudinal magnetic-field-modulated spin-exchange-relaxation-free comagnetometer in inertial rotation measurement | |
| Yin et al. | Suppression of laser intensity fluctuation in resonator optical gyro by a simple light intensity feedback technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |