CN105547174B - Distributed high-accuracy laser on-line measurement system - Google Patents
Distributed high-accuracy laser on-line measurement system Download PDFInfo
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- CN105547174B CN105547174B CN201510846985.4A CN201510846985A CN105547174B CN 105547174 B CN105547174 B CN 105547174B CN 201510846985 A CN201510846985 A CN 201510846985A CN 105547174 B CN105547174 B CN 105547174B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
Abstract
The present invention provides a kind of distributed high-accuracy laser on-line measurement device, using main laser, backup laser as transmitting light source；Transmitting laser emits light beam via multichannel is divided into after optics bundling device, optical circulators and optical beam-splitter；Emit light beam and beam splitting light path number is further increased by array of photoswitch, meanwhile, photoswitch can carry out sequential switching by the control of system to light extraction light path；An optical transmitting and receiving antenna, and then a corresponding cooperative target standard type are corresponded to per shoot laser all the way；The laser returned through cooperative target equally returns to optical circulators by above-mentioned light path, and enters photodetector；After the opto-electronic conversion of photodetector, phase of echo resolving is carried out by signal processing system, to obtain the accurate distance information of target dot matrix.The present invention is realized carries out in-orbit real-time distortion measurement, by the measurement to antenna surface type, the picture quality that can be promoted the imaging resolution of large-scale antenna and calculate to the large-scale unfolding mechanism such as satellite antenna.
Description
Technical field
The present invention relates to space technology fields, more particularly to one kind is for large corporations' distortion measurements such as satellite SAR antennas
Distributed high-accuracy laser on-line measurement device.
Background technology
In the various unfolding mechanisms of satellite, various on-line measurements is needed to obtain its positional precision, vibration performance.The type of antenna
Planar survey has significant impact to imaging resolution, the picture quality calculated.
The large-scale antennas such as satellite-borne SAR mechanism can be acted on, these load by the various load in space in the process in orbit
Include mainly thermal force, the Gradient of Gravitation square, atmospheric drag and satellite motion interference etc., is vibrated so as to cause aerial panel, drop
The attitude stability and pointing accuracy of low satellite, and the performance of antenna is seriously affected, cause image blur, resolution ratio to reduce；More
For the serious is vibrations to cause antenna structure to destroy.Therefore, to spaceborne large-scale antenna mechanism for implementing vibration measurement and control
It is very necessary.
When the front of spaceborne large-scale antenna mechanism is when the effect of external disturbance is deformed, the radiating element position of front
Also can occur to change accordingly, error will generate system electrical property important influence, and the directional diagram of antenna will be caused to occur
Distortion, main lobe gain decline, minor level raising and beam position inaccuracy etc..
Laser phase formula ranging technology is more mature, and the hand-hold ranger of part commercialization also uses the detection
Mode, but as the SAR antennas when large size unfolding mechanism surface type measurement of space, no matter conventional hand rangefinder is from measuring essence
Degree or data updating rate etc. all cannot be satisfied demand, especially antenna surface type and need a large amount of target detections, pass through space
The position of dot matrix is counter to be pushed away, and it is even more impossible to meet demands for single-point hand-hold ranger.Although image camera can be to day line target
High definition imaging is carried out, even if being binocular distance measurement, precision also cannot be satisfied demand.Scanning imagery laser radar is limited to
The multiple influence of sweep time, range accuracy and angle measurement accuracy, the integrity problem to work when especially in-orbit long make it can not
Meet similar tasks demand.
In terms of the ranging of laser phase formula, patent《A kind of phase-shift laser rangefinder device》In, it is proposed that one kind for away from
The light that laser is sent out directly is entered integrated electro-optic modulator by the laser ranging system from measurement, the device through fiber optic conduction,
Emergent light simplifies light channel structure still through fiber optic conduction to rangefinder transmitting objective lens focal point.Patent《Laser ranging system》In,
The composition of laser ranging system has relatively been discussed in detail, has included emission system, reception system, control and measuring system etc..Patent
《Full-phase FFT spectrum analyzing device》In, it is indicated that it is with the good performance for inhibiting spectral leakage, and due to its " phase
Invariant position " need not take Spectrum Correction measure that can accurately extract the phase information of signal.But above-mentioned all patents,
It can not solve large-scale antenna mechanism distortion measurement problem encountered.
Article《Distortion Measurement and Compensation in a Synthetic Aperture
Distortion measurement in Radar Phased-Array Antenna synthetic aperture radar phased array antenna and compensation》It points out,
In wireless synthetic aperture satellite (WiSAR), uses phase type array ranging technology and come monitoring aerial deformation and compensation, carrier wave
For the microwave carrier of 3.74GHz, measurement accuracy is only capable of reaching 1mm or so.Article《Portable laser rangefinder correlative study》
And article《Laser range finder based on FPGA and DDS technologies》The related Development Techniques of phase laser distance measurement instrument are all described,
But as discussed above, they can not all solve that this patent proposed for needed for large-scale antenna deformation measurement and comment
Estimate work, and this is also exactly the creative place of this patent.
Invention content
Problems solved by the invention is that satellite large size deployable antenna (such as SAR) mechanism is easy to happen in-orbit deformation, and deforms
The position phase precision of antenna array radiating element will be influenced, is distorted so as to cause the directional diagram and imaging of antenna, influences antenna
Imaging precision.Swash for this purpose, the present invention provides a kind of distributed high-accuracy for large corporations' distortion measurement such as satellite SAR antennas
Light on-line measurement device, to effectively improve the deformation measurement precision of antenna.
In order to achieve the above object, the technical solution of the present invention is to provide one kind for the large-scale unfolding mechanism such as satellite antenna
The distributed high-accuracy laser on-line measurement system of distortion measurement, including：
Main transmitting lasing light emitter, preparation penetrate lasing light emitter and modulation drive system, and the modulation drive system is to the main transmitting
The light intensity that lasing light emitter and preparation penetrate lasing light emitter output laser is modulated using just/cosine signal；
Optics bundling device, the emergent light that the main transmitting lasing light emitter and preparation are penetrated to lasing light emitter are combined into light beam；
Optical circulators are switched as optical transmitting and receiving, and the transmitting laser after pairing beam carries out transceiver insulation；
Transmitting laser is divided into multichannel and emits light by optical beam-splitter；
Array of photoswitch controls the Laser emission of different emitting light paths；
Dual-mode antenna array, to being respectively equipped with a corresponding dual-mode antenna per transmitting laser all the way；
Cooperative target array is arranged to dual-mode antenna array according to preset geometric position is corresponding, the cooperation
Target Aerial Array is small corner cube reflector array, and the corner cube reflector is reflected the light being irradiated by parallel light path direction
Go back to original place；
The reflected light that the photodetector is transferred to via the optical circulators is converted to electricity by photodetector
Signal；
Signal processing carries out resolving processing with control system to electric signal, obtains the accurate distance information of Target Aerial Array.
Preferably, the signal processing includes with control system：
DDS hardware modules, for generating various signal sources, wherein further comprising：
Module occurs for main signal, for generating emitted luminescence intensity modulated signal；
Module occurs for the first reference signal, the reference signal for generating transmitting modulated signal；
Module occurs for the second reference signal, for generating reference phase signal, to assess the phase shift of echo-signal；
Emit modulation module, module occurs for connection main signal, for realizing the pretreatment of transmitting modulated signal, with driving
Main transmitting lasing light emitter and preparation penetrate lasing light emitter；
Signal receives preprocessing module, for carrying out including filtering, amplification to the photodetector received signal
It pre-processes and realizes AGC automatic gains；
Frequency mixing module, for receiving the signal and the generation module progress of the first reference signal that preprocessing module obtains to signal
Analog frequency mixing processing, realizes the down coversion of heliogram；
First AD sampling modules, the low frequency signal for being generated to frequency mixing module carry out sampling processing, to realize that analog/digital turns
It changes；
2nd AD sampling modules are sampled for module to occur to the second reference signal, to realize analog/digital conversion；
FPGA hardware module further comprises for signal processing and solving target distance：
Correlator phase discriminator module, for realizing the digital phase detection function of the first AD sampling modules and the 2nd AD sampling modules；
Distance resolves module, for being resolved into row distance according to phase identified result；
Host computer communication module, for being communicated with master system；
Time-sequence control module realizes measurement for carrying out switch control to array of photoswitch to control different light paths.
Preferably, the main transmitting lasing light emitter and preparation penetrate lasing light emitter be respectively adopted main semiconductor laser and backup partly lead
Body laser is used as transmitting light source, and by 50：50 optics bundling device closing light.
Preferably, the array of photoswitch uses MEMS optical switch, control signal rising time to be less than
0.5ms, channel are 1 × 32 or more.
Preferably, the dual-mode antenna array number is consistent with cooperative target array number, and the two is after mechanism deploying
It directly corresponds, target bearing caused by transmitting-receiving optical antenna beam divergence angle is sized to overlay structure deformation deviates, and makes cooperation
Target will not offset out system visual field.
Preferably, the modulating frequency of the modulation drive system is 100MHz.
Preferably, system staggeredly irradiates Target Aerial Array using dual wavelength dual-support structure.
The present invention provides distributed high-accuracy laser of the one kind for satellite large-scale antenna (such as SAR) mechanism distortion measurement and exists
Line measuring device, using main laser and transmitting light source of the backup laser as lifting system reliability and working life；Hair
It penetrates laser and emits light beam via multichannel is divided into after optics bundling device, optical circulators and optical beam-splitter；Emit light beam into one
Step increases beam splitting light path number by array of photoswitch, meanwhile, photoswitch can carry out sequential by the control of system to light extraction light path
Switching；An optical transmitting and receiving antenna, and then a corresponding cooperative target standard type are corresponded to per shoot laser all the way；It is returned through cooperative target
Laser optical circulators are equally returned to by above-mentioned light path, and enter photodetector；Pass through the opto-electronic conversion of photodetector
Afterwards, phase of echo resolving is carried out by signal processing system, to obtain the accurate distance information of target dot matrix, by algorithm process
The deflection of antenna surface type can be evaluated afterwards.In-orbit reality is carried out to the large-scale unfolding mechanism such as satellite antenna the present invention provides a kind of
When distortion measurement means, by the measurement to antenna surface type, the figure that the imaging resolution of large-scale antenna can be promoted and calculated
Image quality amount.
Compared with prior art, the present invention has the following advantages：
The present invention solves the problems, such as that the in-orbit deformation of satellite large size deployable antenna (such as SAR) mechanism measures in real time.
Measuring system does not use any movable part, and reliability is high, and uses Double redundancy backup in key component-laser, has
The power degeneration ability of long-term work is repaid in the next choice, is adapted to the strict demand of long-life satellite；System uses dual wavelength dual-gripper
Structure staggeredly irradiates layout, effectively avoids the staggeredly interference problem of far field objects pair；After system makes full use of whole star mechanism deploying
Structure establish thick ruler distance, then determine accurate distance using the thin measurement ruler of high frequency lasers intensity modulated, the system of simplifying is set
Count difficulty；System, come the anti-face type distortion for pushing away large-scale antenna target, is realized not using the target acquisition of array dot matrix by photoswitch
It is converted with measuring point, global measuring can be carried out to all monitoring points, single characteristic point high refresh rate can also be carried out and measured, met not
With the demand of task.
Description of the drawings
Fig. 1 is the distributed high-accuracy laser on-line measurement system fundamental diagram of one embodiment of the invention；
Fig. 2 is the signal processing of the distributed high-accuracy laser on-line measurement system of one embodiment of the invention and control is
System fundamental diagram；
Fig. 3 is topology layout of the distributed high-accuracy laser on-line measurement system of one embodiment of the invention on whole star
Schematic diagram.
Specific implementation mode
The present invention using semiconductor laser just/cosine intensity modulation, fiber beam splitting transmitting, the photoswitch time-division control side
Method receives and dispatches the optical antenna unit set altogether and receives echo, with reference signal by the reflection of the small pyramid reflector of measurement point
Difference frequency digital phase detection is carried out, obtains high-resolution range information, and then resolved antenna plane degree by multiple spot range data and turned round
Curvature meets the needs of whole star is to the unfolding mechanisms such as antenna real-time distortion measurement.
The required active and standby laser light source of the present invention uses semiconductor laser, inside use TEC Peltier temperature controls system
System to ensure the stabilization of luminous power, modulate, and generates the hair of phase measuring system by the current strength that 100MHz is carried out to laser
Penetrate laser.
Strength investigation is carried out to echo-signal using low noise photodetector, passes through automatic growth control (AGC) circuit
Echo signal is effectively amplified, after amplified signal carries out analog frequency mixing with reference signal, using low speed, big digit AD
Acquisition chip converts analog signals into digital signal.Using in device FPGA realize storage, and with another reference signal into
Row correlated digital phase demodulation, the accurate distance of cooperative target is calculated according to identified result.
System is opened the light by certain timing control multichannel light, is realized and is received and dispatched opening and closing for light path, Jin Ershi to multichannel
Now to the subsequent detection of cooperation target point battle array, certainly, can also high refresh rate accurately detecting be carried out to interested single-point.
System difference frequency phase demodulation detection operations principle is as follows, and system transmitting light signal strength is represented by
Wherein, A is transmitting light signal strength, ω2To emit the frequency of light modulating signal,To emit the phase of light, photoelectricity
The return signal luminous intensity that detector receives is
Wherein, B is to receive light signal strength,For the phase difference for receiving light echo with emitting optical signal.Reference signal 1 can
It is expressed as
Wherein, A1On the basis of signal strength, ω1On the basis of signal frequency,On the basis of signal initial phase.By benchmark
Signal 1 is mixed with optical signal is received, and obtains output low frequency signal
Wherein, D is mixed frequency signal intensity.The reference signal 2 of generation is represented by
Wherein, on the basis of E signal 2 intensity.From formula (4) and formula (5)：Two low frequency signals obtained after difference frequency
Phase difference is the same with the phase difference for being mixed preceding high-frequency modulation signal measured directly.In this way, no matter how light ruler frequency becomes
It changes, can ensure that the signal after mixing is a low frequency and frequency is certain value, convenient for ensureing the accuracy of detection of phase.
Technical scheme of the present invention is described in detail below in conjunction with the accompanying drawings.
The work of the distributed high-accuracy laser on-line measurement system of one embodiment of the invention shown in please referring to Fig.1 is former
Reason figure.
In distributed high-accuracy laser on-line measurement system provided by the invention, including：Active and standby laser light source 1 and modulation are driven
Dynamic system 10, it is strong through sine wave (or cosine wave) that the main transmitting lasing light emitter and preparation of the active and standby laser light source 1, which penetrate lasing light emitter,
Spend modulated continuous-wave laser.Main transmitting lasing light emitter and preparation penetrate the emergent light of lasing light emitter via being closed after optics bundling device 2
For light beam, the cold and hot backup of transmitting laser can be realized in this way；The transmitting laser after beam is closed to open via optical transmitting and receiving
Closing --- optical circulators 3 carry out the transceiver insulation of transmitting laser, then are divided to emit for multichannel by optical beam-splitter 4 more than one point and be swashed
Light.Transmitting laser is controlled by array of photoswitch 5, is generated multi-pass and is emitted laser, and per transmitting laser all the way, there are one receive and dispatch day
Line is corresponding to it, and multiple dual-mode antennas collectively constitute dual-mode antenna array 6, dual-mode antenna array 6 and cooperative target array 7 according to
Preset geometric position carries out one-to-one combination arrangement, to meet the needs of surface type measurement.Cooperative target array 7 is by micro-
Small corner cube reflector composition, the work(which can be reflected back the light being irradiated by parallel light path direction Yuan Lu
Can, reflected light is equally via being transferred to photodetector 8 by optical circulators 3 after above-mentioned optical system and be converted to telecommunications
Number.The photoelectric conversion signal is resolved by signal processing and control system 9, to obtain the accurate distance information of target,
The deflection of antenna surface type is evaluated after algorithm process.
In the present embodiment, the active and standby laser light source 1 high, long lifespan semiconductor laser for maturity, modulation driving
System is just/cosine intensity modulation.The active and standby laser light source 1 is made using main semiconductor laser and backup semiconductor laser
To emit light source, the reliability of operation on orbit when system is long, and main semiconductor laser and backup semiconductor laser are fully ensured that
Device is realized by optics bundling device 2 closes beam, is not required to be controlled using active device, further improves the reliability of system.
1 emergent light of active and standby laser light source is via 50：50 optics bundling device closing light, shoot laser can equally be divided into
50：50 two-way light, in the case where system luminous power is enough, subsequent optical path can be only with wherein all the way；If shining
Power is inadequate, can mostly use an optical circulators and add photodetector, be realized respectively to different dual-mode antenna array light paths
Detection.
The optical circulators 3 are passive optical transceiving device, and function is similar to microwave transmitting and receiving (TR) component, the optics ring
Shape device 3 has very high optical transmission direction (being more than 60dB) and isolation (being more than 55dB), it is ensured that receives and dispatches the good of light path
Good separation.
The light array 5 that opens the light uses MEMS (MEMS) photoswitch, and signal rising time is short (is less than for control
0.5ms), channel can meet sequence handover measurement demand of the system to multiple targets with up to 1 × 32 or more.
The aerial array number of the dual-mode antenna array 6 is consistent with 7 numbers of cooperative target array, and the two is in mechanism exhibition
It is directly corresponded after opening, target bearing caused by transmitting-receiving optical antenna beam divergence angle is sized to overlay structure deformation deviates, and makes
Cooperative target will not offset out the visual field of transmitting antenna.The array of photoswitch 5 can be with dual-mode antenna array 6 and cooperative target
Array 7 is one-to-one relationship.
The cooperative target array 7 uses optics pyramid reflector, can be parallel by the laser original road launched
It is reflected back, and is directed to bis- (more) the wavelength laser layouts of system thereon, the coating technique of different membrane systems is used, to ensure compliance with not
The laser of co-wavelength can former road be reflected back, without the laser that meets the requirements can not former road be reflected back.
The photodetector 8 can be photoelectric sensor assembly, have the function of signal pre-amplification, may be implemented to faint
The primary amplification of signal.
The modulation drive system 10 is high speed current strength modulating system, is swashed to exporting using just/cosine signal at a high speed
The light intensity of light is modulated, and modulating frequency is up to 100MHz, it is ensured that phase method measurement ruler range is shorter (1.5m), identical
Under phase precision of phase discrimination, distance resolution higher, and the fuzzy distance more than the thin measurement ruler carries out solution mould by system mounting distance
Paste can reach 42 μm of measurement accuracy under current domestic 0.01 ° of conventional numerical precision of phase discrimination level, and external high-precision
The digital phase discriminator of degree can accomplish 0.001 °, and corresponding range accuracy is 4.2 μm.
The signal processing of one embodiment of the present of invention shown in please referring to Fig.2 and control system fundamental diagram, it is described
Signal processing further comprises with control system 9：
DDS hardware modules 91, major function include generating emitted luminescence intensity modulated signal and generating to emit modulated signal
Reference signal, for assessing the phase shift of echo-signal；Emit modulation module 92, by connecting the main letter in DDS hardware modules 91
Number module 911, the main pretreatment and amplification for realizing transmitting modulated signal, to drive active and standby laser light source 1 occurs；Signal receives
Preprocessing module 93, it is automatic including AGC for the pretreatments such as 8 received signal of photodetector being filtered, being amplified
The functions such as gain；Frequency mixing module 94, for receiving the heliogram and a reference signal that preprocessing module 93 obtains to signal
Module 912 occurs and carries out analog frequency mixing processing, and then realizes the down coversion of heliogram, which can ensure the phase of signal not
Become, phase demodulation is carried out to the low frequency signal, measurement accuracy can be substantially improved；One AD sampling module 95, for frequency mixing module 94
Low frequency signal afterwards carries out sampling processing, to realize analog/digital conversion function；Another AD sampling module 96, for another
Reference signal occurs module 913 and is sampled, to realize analog/digital conversion function.It is big that low sampling rate, digit are used in the present invention
AD sampling modules, to ensure that signal processing precision, sample frequency should be ensured of the complete cycle times of echo-signal as possible.
It is equipped with FPGA hardware module 97 in the present embodiment, is mainly used for the functions such as signal processing and solving target distance, tool
Body includes correlator phase discriminator module 971, the main digital phase detection function of realizing AD sampling modules 95 and AD sampling modules 96；Distance solution
Calculate module 972, the function of mainly being resolved into row distance according to phase identified result；Host computer communication module 973, major function are
Completion is communicated with master system；Time-sequence control module 974 mainly carries out switch control to array of photoswitch 5, to reach
The effect measured is realized to control different light paths.
The distributed high-accuracy laser on-line measurement system of one embodiment of the invention shown in please referring to Fig.3 is on whole star
Topology layout schematic diagram.
In the present invention, system makes full use of the structure after whole star mechanism deploying to establish thick ruler distance, is then swashed using high frequency
The thin measurement ruler of light intensity modulation determines accurate distance, simplifies system design difficulty.
System, can be to avoid far field in such a way that dual wavelength dual-support structure staggeredly irradiates (see attached drawing 3) Target Aerial Array
Staggeredly interference problem of the target between different transmitting antennas, effectively increases the energy of the anti-large-scale antenna deformation interference of system
Power.When not using the measure, transmitting light beam divergence angle the permitted maximum range is
Wherein, H is transmitting-receiving vertical height of the optical antenna away from target dot matrix, and L is transmitting-receiving distance of the optical antenna away from target,
D1For target A1With adjacent target A2Between fore-and-aft distance.After staggeredly being irradiated using dual wavelength dual-support structure, system emits light
Beam divergence angle the permitted maximum range is
Wherein, D2For target A1With target A4Between fore-and-aft distance.There is D under normal conditions2=4D1, andCause
This approximation has θ2=4 θ1, 4 times of system transmitting light angle of divergence increase, permission antenna deformation amount will also increase 4 times, this is in large scale day
Line will be significantly when measuring.
To sum up, the present invention efficiently solve the mechanisms such as satellite large size deployable antenna (such as SAR) it is in-orbit deform measure in real time
Problem.Measuring system does not use any movable part, and reliability is high, and Double redundancy backup is used in key component, has
The power degeneration ability for compensating long-term work, is adapted to the strict demand of high rail long-life satellite；System is using the double branch of dual wavelength
Support structure staggeredly irradiates layout, effectively avoids the staggeredly interference problem of far field objects pair；System uses array dot matrix target acquisition
Carry out the anti-face type distortion for pushing away large-scale antenna target, different measuring points conversion is realized by photoswitch, all monitoring points can be carried out
Global measuring can also carry out single characteristic point high refresh rate and measure, meet the needs of different.It the composite can be widely applied to satellite
The in-orbit deformation of the mechanisms such as large-scale deployable antenna measures in real time.
In conclusion a kind of distributed high-accuracy laser for large-scale antenna unfolding mechanism provided by the invention is surveyed online
Amount system, is modulated using semiconductor laser, fiber beam splitting transmitting, and the method for photoswitch time-division control passes through the small of measurement point
Pyramid reflects, and receives and dispatches the receiving unit set altogether and receives echo, can carry out digital phase detection to difference frequency signal, obtain high-resolution
Range information, and then antenna plane degree and torsion resistance are resolved by multiple spot range data.Pass through high-frequency range measurement, this system
High refresh rate and high-precision measurement can also be carried out to fixed point, valid data are provided for vibration compensation.
Overall measurement system does not use any movable part, reliability high in the present invention；It is used in key component-light source
Double redundancy backup, can directly hot and cold switching, have the power degeneration ability of compensation long-term work, thus this system adapts to
In strict demand of the long-life satellite to measuring system.System can carry out all monitoring points on large-scale antenna global survey
Amount, local dot cycle measurement, characteristic point high-precision high refresh rate (being more than 200Hz) measure, and meet the needs of different task.For
When characteristic point carries out high refresh rate measurement, the rumble spectrum of antenna can be obtained, to carry out active vibration to antenna mechanism in real time
Inhibition provides possibility.System, can be to avoid far field mesh in such a way that dual wavelength dual-support structure staggeredly irradiates Target Aerial Array
Staggeredly interference problem of the mark between different transmitting antennas, effectively increases the energy of the anti-large-scale antenna deformation interference of system
Power.Implemented by the design, can effectively increase 4 times of structural deformation amount tolerance.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of distributed high-accuracy laser on-line measurement system, which is characterized in that including：
Main transmitting lasing light emitter, preparation penetrate lasing light emitter and modulation drive system（10）, the modulation drive system（10）To the master
The light intensity that transmitting lasing light emitter and preparation penetrate lasing light emitter output laser is modulated using just/cosine signal；
Optics bundling device（2）, the main transmitting lasing light emitter and preparation are penetrated the emergent light of lasing light emitter and are combined into light beam；
Optical circulators（3）It is switched as optical transmitting and receiving, the transmitting laser after pairing beam carries out transceiver insulation；
Optical beam-splitter（4）, transmitting laser is divided into multichannel and emits light；
Array of photoswitch（5）, control the Laser emission of different emitting light paths；
Dual-mode antenna array（6）, to being respectively equipped with a corresponding dual-mode antenna per transmitting laser all the way；
Cooperative target array（7）, with dual-mode antenna array（6）It is accordingly arranged according to preset geometric position, the conjunction
Make Target Aerial Array（7）It is small corner cube reflector array, the corner cube reflector is by the light being irradiated by parallel light path side
To being reflected back original place；
Photodetector（8）, will be via the optical circulators（3）It is transferred to the photodetector（8）Reflected light turn
It is changed to electric signal；
Signal processing and control system（9）Resolving processing is carried out to electric signal, obtains the accurate distance information of Target Aerial Array.
2. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
The signal processing and control system（9）Including：
DDS hardware modules（91）, for generating various signal sources, wherein further comprising：
Module occurs for main signal（911）, for generating emitted luminescence intensity modulated signal；
Module occurs for the first reference signal（912）, the reference signal for generating transmitting modulated signal；
Module occurs for the second reference signal（913）, for generating reference phase signal, to assess the phase shift of echo-signal；
Emit modulation module（92）, connection main signal generation module（911）, for realizing the pretreatment of modulated signal is emitted,
To drive main transmitting lasing light emitter and preparation to penetrate lasing light emitter；
Signal receives preprocessing module（93）, for the photodetector（8）Received signal is carried out comprising filtering, amplification
Pretreatment and realize AGC automatic gains；
Frequency mixing module（94）, for receiving preprocessing module to signal（93）Module occurs for obtained signal and the first reference signal
（912）Analog frequency mixing processing is carried out, realizes the down coversion of heliogram；
First AD sampling modules（95）, for frequency mixing module（94）The low frequency signal of generation carries out sampling processing, with realize mould/
Number conversion；
2nd AD sampling modules（96）, for module to occur to the second reference signal（913）It is sampled, to realize that analog/digital turns
It changes；
FPGA hardware module（97）, for signal processing and solving target distance, further comprise：
Correlator phase discriminator module（971）, for realizing the first AD sampling modules（95）With the 2nd AD sampling modules（96）Number mirror
Phase function；
Distance resolves module（972）, for being resolved into row distance according to phase identified result；
Host computer communication module（973）, for being communicated with master system；
Time-sequence control module（974）, it is used for array of photoswitch（5）Switch control is carried out, measurement is realized to control different light paths.
3. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
The main transmitting lasing light emitter and preparation penetrate lasing light emitter and main semiconductor laser and backup semiconductor laser work are respectively adopted
To emit light source, and by 50：50 optics bundling device（2）Closing light.
4. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
The array of photoswitch（5）Using MEMS optical switch, control signal rising time is less than 0.5ms, channel 1
× 32 or more.
5. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
The dual-mode antenna array（6）Number and cooperative target array（7）Number is consistent, and the two is direct one after mechanism deploying
One corresponds to, and target bearing caused by transmitting-receiving optical antenna beam divergence angle is sized to overlay structure deformation deviates, and makes cooperative target not
System visual field can be offset out.
6. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
The modulation drive system（10）Modulating frequency be 100MHz.
7. distributed high-accuracy laser on-line measurement system as described in claim 1, which is characterized in that
System staggeredly irradiates Target Aerial Array using dual wavelength dual-support structure.
8. the distributed high-accuracy laser on-line measurement system as described in any one of claim 1 ~ 7, which is characterized in that
The distributed high-accuracy laser on-line measurement system is used for satellite large size deployable antenna mechanism.
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| CN201510846985.4A CN105547174B (en) | 2015-11-27 | 2015-11-27 | Distributed high-accuracy laser on-line measurement system |
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| CN106093905B (en) * | 2016-06-21 | 2018-07-31 | 成都雷尼尔科技有限公司 | Precision instrumentation radar frequency deviation classification frequency measuring method based on apFFT phase differences |
| CN106291579A (en) * | 2016-08-31 | 2017-01-04 | 湖北久之洋红外系统股份有限公司 | A kind of laser detection system having cooperative target |
| CN106815402A (en) * | 2016-12-13 | 2017-06-09 | 上海卫星工程研究所 | A kind of in-orbit thermal deformation predicting method of full-scale spacecraft structure |
| CN108627974A (en) * | 2017-03-15 | 2018-10-09 | 松下知识产权经营株式会社 | Photo-scanning system |
| CN107121232B (en) * | 2017-05-12 | 2019-07-16 | 哈尔滨工程大学 | A kind of fin shaft device and method based on laser ranging real-time detection dynamic lift |
| CN108445468B (en) | 2018-04-03 | 2019-11-05 | 上海禾赛光电科技有限公司 | A kind of distribution type laser radar |
| CN110542894A (en) * | 2019-10-11 | 2019-12-06 | 上海无线电设备研究所 | Coherent laser detection system and method of optical receiving and transmitting combination |
| CN116868079B (en) * | 2022-11-10 | 2024-02-27 | 长沙天恒测控技术有限公司 | Zero phase calibration method, computer device and storage medium |
| CN115493510B (en) * | 2022-11-21 | 2023-03-21 | 北京航空航天大学 | Radar antenna profile measuring method based on distributed fiber Bragg grating |
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| CN1316226C (en) * | 2005-01-04 | 2007-05-16 | 李小路 | Method for real-time measurement of airfoil deformation using dual laser |
| US8228490B2 (en) * | 2009-08-07 | 2012-07-24 | Raytheon Company | System and method for precise measurement of deflection |
| CN201514481U (en) * | 2009-09-23 | 2010-06-23 | 伊玛精密电子（苏州）有限公司 | Laser range finder |
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| CN104949629A (en) * | 2015-04-20 | 2015-09-30 | 同济大学 | Laser ranging-based dangerous-rock deformation multipoint information extraction and warning system |
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