CN105137416A - Hyperspectral laser radar target sample test apparatus and method - Google Patents
Hyperspectral laser radar target sample test apparatus and method Download PDFInfo
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- CN105137416A CN105137416A CN201510591715.3A CN201510591715A CN105137416A CN 105137416 A CN105137416 A CN 105137416A CN 201510591715 A CN201510591715 A CN 201510591715A CN 105137416 A CN105137416 A CN 105137416A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The invention discloses a hyperspectral laser radar target sample test apparatus and method. The hyperspectral laser radar target sample test apparatus includes a pulse type super-continuum laser source, a laser source two-dimensional rotating device, a divergence angle-adjustable electrically-controlled collimator, a micro structure crystal optical fiber, a loading turntable, a detector rotating device, an echo collecting device fixed at the upper end of a detector support, a detection device, and a control center connected with the laser source two-dimensional rotating device, the electrically-controlled collimator, the detector rotating device, the loading turntable and the detection device. With the hyperspectral laser radar target sample test apparatus and method of the invention adopted, the multi-angle information of the spectrum of the echoes of a target sample in a hemisphere space can be automatically and quickly measured under a pulse type wide spectrum laser detection condition. The hyperspectral laser radar target sample test apparatus and method can be applied to scattering and radiation characteristic research of super-continuum pulse laser of target samples.
Description
Technical field
The present invention relates to remote sensing fields, particularly relate to a kind of EO-1 hyperion laser radar target sample test unit and method.
Background technology
Body surface has three kinds of forms to electromagnetic reflection: mirror-reflection, diffuse reflection and direction reflection.Mirror-reflection digital reflex angle equals incident angle, and reflection energy concentration is in a direction; Diffuse reflection refers to whole surface all equably to each to reflecting the incident light; Direction is reflected between diffuse reflection and mirror-reflection, respectively to there being reflection, but each to reflection strength heterogeneity.
In fact most natural surface is all rough surface for the wavelength of radiation.When the surface of object is enough coarse, to such an extent as to it is constant to the reflected radiation brightness of solar shortwave radiation in the 2 π spaces at the center of object, and namely reflected radiation brightness does not become with observation angle, and we claim this object to be diffuse reflector, also known as lambert's body.Diffuse reflection, also known as lambert (Lambert) reflection, also claims isotropy reflection.Between diffuse reflection and mirror-reflection, reflection is called that direction is reflected, and also claims non-lambertian reflection.The object producing direction reflection accounts for the overwhelming majority at occurring in nature, and namely they have anisotropic properties to the scattering of solar radiation.When remote sensing application enters the quantitative remote sensing stage, the hypothesis that we must abandon " target is lambert's body ".Current major applications also all adopts lambert to be similar to.Describe direction reflection can not simply state, because the reflectivity of all directions is all different with reflectivity.For target and the Non Lambert reflector of remote sensing application, it not only becomes with wavelength the reflection of the sun/radiation of light source, scattering power, also becomes with direction in space simultaneously.
The Spectral Characteristic of target sample refers to the rule that this atural object becomes with wavelength the reflection of light source, scattering power.The composition of ground-object spectrum feature and atural object, the structural relation of interior of articles is close, the popular color characteristic saying ground-object spectrum feature i.e. atural object.Target sample Spectral Characteristic refer to and measured value under specific incident angle and observation angle comprise Spectral Characteristic and these two key elements of spatial structure characteristic thereof of its material.
And the direction character of target sample is used to, and description target sample reflects light source, scattering power changes at director space, this Spatial Variation depends mainly on two kinds of factors, the surfaceness of first object, it not only depends on the proportionate relationship between surperficial average roughness height value and electromagnetic wavelength, but also in close relations with visual angle.
The light source of EO-1 hyperion laser radar is the pulse laser of wide range, and compare the spectrum that transmission spectra instrument is measured, integral time is extremely short, the photoelectric device that its spectral measurement needs the rise time extremely short.Patent 201110178750.4 and 200910243719.7 measures with the equipment of the multi-angle information of the atural object of sunshine radiant, is not suitable for the application of pulse lidar.In order to study the application of EO-1 hyperion laser radar in vegetation biochemical component and structural parameters detection, being necessary the spectrum multi-angle information of goal in research sample, thus realizing the structure of complicated vegetation and the accurately detecting of biochemical component information.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is to provide a kind of EO-1 hyperion laser radar target sample test unit and method, for the spectrum multi-angle information under pulsed laser light source irradiates of experimental study target sample, thus be the scattering cross-section calculating of wide range pulse lidar, provide basic data to the structure of complicated vegetation and the accurately detecting of biochemical component information.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of EO-1 hyperion laser radar target sample test unit, it comprises:
Pulsed super continuous spectrums LASER Light Source; Lasing light emitter two dimension angle station; The electricity that the angle of divergence is adjustable adjusts collimating apparatus; Connect the microstructure crystal optical fibre of pulsed super continuous spectrums LASER Light Source and electricity tune collimating apparatus; Loading turntable; Detector angle station; Be fixed on the echo gathering-device of detector carriage upper end; Sniffer; Connect the control center of lasing light emitter two dimension angle station, electricity tune collimating apparatus, detector angle station, loading turntable, sniffer;
Preferred as technique scheme, lasing light emitter two dimension angle station comprises light source levels turntable, the vertical turntable of light source, horizontal stand and vertical rack;
Preferred as technique scheme, electricity adjusts collimating apparatus to be fixed on the upper end of the vertical rack of described lasing light emitter two dimension angle station,
Preferred as technique scheme, loading turntable is installed on the top of light source levels turntable in horizontal direction, comprises loading electric rotary table and is fixed on the sample carrying disk on loading universal stage.
Preferred as technique scheme, detector angle station comprises the vertical turntable of detection and is installed on the telescopic detector carriage on the vertical turntable of detection, and described scalable detector carriage adopts sliding block guide track structure, for regulating detection viewing field.
Preferred as technique scheme, echo gathering-device comprises lens barrel, the quartzy biconvex lens that lens barrel front end is installed, focusing back, light harvesting optical fiber that front and back position is adjustable, one end of described light harvesting optical fiber is connected to the center focusing on back, and this center is also the one-tenth image focus of the detection of a target simultaneously.
Preferred as technique scheme, sniffer comprises the joints of optical fibre, converge eyeglass, reflection grating, converge catoptron, diaphragm, 32 yuan of linear array photomultiplier tube array sensor assemblies that position is adjustable, sensor drive driving circuit, change-over switch, data acquisition unit, the described joints of optical fibre connect other one end of light harvesting optical fiber, described sensor drive driving circuit connects 32 yuan of linear array photomultiplier tube array, 32 yuan of linear array photomultiplier tube array sensor assemblies that described position is adjustable comprise one dimension translation stage, with the sensor movement parts that dove tail is installed, be arranged on 32 yuan of linear array photomultiplier tube array on moving component, sniffer also comprises a road and launches separately sampling detecting module, and comprise the micro-sampling mirror of plated film, fiber adapter, the sampling optical fiber of quartzy material, fiber bench, sampling detector, the output of sampling detector is directly inputted in data acquisition unit.
Preferred as technique scheme, test unit also comprises diffuse reflection reference blank.
Preferred as technique scheme, 4 drive motor in lasing light emitter two dimension angle station, loading turntable, detector angle station are all provided with absolute value encoder.
Test method of the present invention is divided into following steps:
S1: control system reset, lasing light emitter two dimension angle station, loading turntable, detector angle station read encoder position information, through control system relatively after, move to the initial position of setting; Feature per sample, the angle of divergence of the straight device of electric adjustable economize on electricity adjustment, and the position of the length of manual adjustments detector carriage and focusing back, determine the field angle observed;
S2: according to testing requirements, sets light source and the position angle of detector and the scope of zenith angle in the controlling in the heart and measures interval angles;
S3: place reference white plate on loading turntable, test unit runs automatically, the spectrum multi-angle information of the blank of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S4: drop target sample on loading turntable, test unit runs automatically, the spectrum multi-angle information of the target sample of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S5: the signal that S3 and S4 step obtains is carried out Gauss curve fitting by control software design automatically, obtains the value on Gauss summit;
S6: control software design is according to bidirectional reflectance factor formulae discovery spectrum multi-angle information.
(3) beneficial effect
A kind of EO-1 hyperion laser radar target sample test unit that technique scheme provides and method, this system can the spectrum multi-angle information of measurement target sample automatically.Light source of the present invention adopts the pulsed laser light source of wide range, compares traditional solar source and other analog light sources, more meets the light source irradiation condition of EO-1 hyperion laser radar.The electricity that the angle of divergence of the present invention is adjustable adjusts collimating apparatus can adjust the size of laser footprint, coordinate telescopic detector carriage and adjustable focusing back can regulate observation field angle, the requirement for different target atural object realizes the spectrum multi-angle information measurement under different investigative range.In addition, by regulating the relative position of 32 yuan of linear array photomultiplier tube array sensor assemblies, spectral range that can be corresponding different, realizes the adjustment as required of measure spectrum scope.
Accompanying drawing explanation
Fig. 1 is a kind of EO-1 hyperion laser radar target sample test unit of the embodiment of the present invention and the one-piece construction schematic diagram of method;
Fig. 2 is a kind of EO-1 hyperion laser radar target sample test unit of the embodiment of the present invention and the transmitting sampling detecting module schematic diagram of method;
Fig. 3 is the principle schematic of a kind of EO-1 hyperion laser radar target sample test unit of the embodiment of the present invention and the receiving unit of method;
Fig. 4 is a kind of EO-1 hyperion laser radar target sample test unit of the embodiment of the present invention and the hyperchannel Full wave shape measurement mechanism motion schematic diagram of method;
Wherein, 101: pulsed super continuous spectrums LASER Light Source; 102: optical fiber; 103: electricity adjusts collimating apparatus; 106: loading turntable; 107: electric rotary table; 108: sample carrying disk; 111: light source levels turntable; 112: the vertical turntable of light source; 113: horizontal stand; 114: and vertical rack; 121: detect vertical turntable; 122: telescopic detector carriage; 123: sliding block guide track structure; 131 echo gathering-devices; 132: light harvesting optical fiber; 135: focus on back; 141: sniffer; 147: data acquisition unit; 151: control center; 160: launch sampling detecting module; 161: the micro-sampling mirror of plated film; 162: fiber adapter; 163: sampling optical fiber; 164: fiber bench; 165: sampling detector; 171: one dimension translation stage; 172: sensor movement parts; 173:32 unit linear array photomultiplier tube array; 142: the joints of optical fibre; 143: converge eyeglass; 144: reflection grating; 145: converge catoptron; 146: diaphragm; 148:32 unit linear array photomultiplier tube array sensor assembly; 149: sensor drive driving circuit; 181: change-over switch; 147: data acquisition unit
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Shown in composition graphs 1 to Fig. 4, embodiments provide a kind of EO-1 hyperion laser radar target sample test unit, comprising: pulsed super continuous spectrums LASER Light Source 101; Lasing light emitter two dimension angle station; The electricity that the angle of divergence is adjustable adjusts collimating apparatus 103; Connect the microstructure crystal optical fibre 102 of pulsed super continuous spectrums LASER Light Source and electricity tune collimating apparatus; Loading turntable 106; Detector angle station; Be fixed on the echo gathering-device 131 of detector carriage upper end; Sniffer 141; Connect the control center 151 of lasing light emitter two dimension angle station, electricity tune collimating apparatus, detector angle station, loading turntable, sniffer.The pulsed super continuous spectrums laser source wavelength scope that the present invention adopts is 350nm-2500nm.
Composition graphs 2, sniffer 141 also comprises a road and launches separately sampling detecting module, comprise the micro-sampling mirror of plated film 161, fiber adapter 162, the sampling optical fiber 163 of quartzy material, fiber bench 164, sampling detector 165, the output of sampling detector is directly inputted in data acquisition unit.This sampling module is for triggering one-shot measurement, and the energy simultaneously sampled also is used for the output energy of calibration laser.Sampling detector of the present invention is avalanche diode sensor.
Composition graphs 3, sniffer comprises the joints of optical fibre 142, converge eyeglass 143, reflection grating 144, converge catoptron 145, diaphragm 146, 32 yuan of linear array photomultiplier tube array sensor assemblies 148 that position is adjustable, sensor drive driving circuit 149, change-over switch 181, data acquisition unit 147, the described joints of optical fibre connect other one end of light harvesting optical fiber 132, described sensor drive driving circuit connects 32 yuan of linear array photomultiplier tube array, 32 yuan of linear array photomultiplier tube array sensor assemblies 148 that described position is adjustable comprise one dimension translation stage 171, with the sensor movement parts 172 that dove tail is installed, be arranged on 32 yuan of linear array photomultiplier tube array 173 on moving component.Wherein, the sensor movement parts that dove tail is installed can drive 32 yuan of linear array photomultiplier tube array to realize fine setting under the driving of one dimension translation stage, correspond to the different spectrum after light splitting.
Composition graphs 1 to Fig. 4, lasing light emitter two dimension angle station comprises two the turntable motions of light source levels turntable 111, the vertical turntable 112 of light source, horizontal stand 113 and vertical rack 114, two Electric Machine Control, realizes the arbitrary orientation angle of light source and the motion control of zenith angle.Wherein, electricity adjusts collimating apparatus 103 to be fixed on the upper end of the vertical rack 114 of lasing light emitter two dimension angle station.State the top that loading turntable 106 is installed on light source levels turntable 111 in horizontal direction, comprise loading electric rotary table 107 and be fixed on the sample carrying disk 108 on loading universal stage.The target sample measured is positioned in carrying disk.Detector angle station comprises the vertical turntable 121 of detection and is installed on the telescopic detector carriage 122 on the vertical turntable of detection, and described scalable detector carriage adopts sliding block guide track structure 123, for regulating detection viewing field.Detector angle station, in conjunction with the motion of loading turntable, can realize detecting arbitrarily zenith angle and azimuthal setting.Can see from the geometric relationship Fig. 4, light source and detection are all on the outside surface of detection hemisphere, thus realize the measurement at any angle of half spherical space inner light source and detector.
The specific works process of the present embodiment is:
S1: control system reset, lasing light emitter two dimension angle station, loading turntable, detector angle station read encoder position information, through control system relatively after, move to the initial position of setting; Feature per sample, the angle of divergence of the straight device of electric adjustable economize on electricity adjustment, and the position of the length of manual adjustments detector carriage and focusing back, determine the field angle observed;
S2: according to testing requirements, sets light source and the position angle of detector and the scope of zenith angle in the controlling in the heart and measures interval angles;
S3: place reference white plate on loading turntable, test unit runs automatically, the spectrum multi-angle information of the blank of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S4: drop target sample on loading turntable, test unit runs automatically, the spectrum multi-angle information of the target sample of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S5: the signal that S3 and S4 step obtains is carried out Gauss curve fitting by control software design automatically, obtains the value on Gauss summit;
S6: control software design is according to bidirectional reflectance factor formulae discovery spectrum multi-angle information.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (4)
1. an EO-1 hyperion laser radar target sample test unit, is characterized in that, described device comprises:
Pulsed super continuous spectrums LASER Light Source (101); Lasing light emitter two dimension angle station; The electricity that the angle of divergence is adjustable adjusts collimating apparatus (103); Connect the microstructure crystal optical fibre (102) of pulsed super continuous spectrums LASER Light Source and electricity tune collimating apparatus; Loading turntable (106); Detector angle station; Be fixed on the echo gathering-device (131) of detector carriage upper end; Sniffer (141); Connect the control center (151) of lasing light emitter two dimension angle station, electricity tune collimating apparatus, detector angle station, loading turntable, sniffer;
Described lasing light emitter two dimension angle station comprises light source levels turntable (111), the vertical turntable of light source (112), horizontal stand (113) and vertical rack (114);
Collimating apparatus (103) of adjusting described electricity is fixed on the upper end of the vertical rack (114) of described lasing light emitter two dimension angle station;
Described loading turntable (106) is installed on the top of light source levels turntable (111) in horizontal direction, comprises loading electric rotary table (107) and is fixed on the sample carrying disk (108) on loading universal stage;
Described detector angle station comprises the vertical turntable of detection (121) and is installed on the telescopic detector carriage (122) on the vertical turntable of detection, described scalable detector carriage adopts sliding block guide track structure (123), for regulating detection viewing field;
Described echo gathering-device (131), comprise lens barrel (133), the quartzy biconvex lens that lens barrel front end is installed, focusing back (135), light harvesting optical fiber (132) that front and back position is adjustable, one end of described light harvesting optical fiber is connected to the center focusing on back (135), and this center is also the one-tenth image focus of the detection of a target simultaneously;
Described sniffer (141) comprises the joints of optical fibre (142), converge eyeglass (143), reflection grating (144), converge catoptron (145), diaphragm (146), 32 yuan of linear array photomultiplier tube array sensor assemblies (148) that position is adjustable, sensor drive driving circuit (149), change-over switch (181), data acquisition unit (147), the described joints of optical fibre connect other one end of light harvesting optical fiber (132), described sensor drive driving circuit connects 32 yuan of linear array photomultiplier tube array, 32 yuan of linear array photomultiplier tube array sensor assemblies (148) that described position is adjustable comprise one dimension translation stage (171), with the sensor movement parts (172) that dove tail is installed, be arranged on 32 yuan of linear array photomultiplier tube array (173) on moving component, sniffer also comprises a road and launches separately sampling detecting module (160), comprise the micro-sampling mirror of plated film (161), fiber adapter (162), the sampling optical fiber (163) of quartzy material, fiber bench (164), sampling detector (165), the output of sampling detector is directly inputted in data acquisition unit.
2. a kind of EO-1 hyperion laser radar target sample test unit according to claim 1, also comprises diffuse reflection reference blank.
3. a kind of EO-1 hyperion laser radar target sample test unit according to claim 1, is characterized in that, 4 drive motor in described lasing light emitter two dimension angle station, loading turntable, detector angle station are all provided with absolute value encoder.
4. use a test method for a kind of EO-1 hyperion laser radar target sample test unit according to any one of claim 1 ~ 3, it is characterized in that comprising:
S1: control system reset, lasing light emitter two dimension angle station, loading turntable, detector angle station read encoder position information, through control system relatively after, move to the initial position of setting; Feature per sample, the angle of divergence of the straight device of electric adjustable economize on electricity adjustment, and the position of the length of manual adjustments detector carriage and focusing back, determine the field angle observed;
S2: according to testing requirements, sets light source and the position angle of detector and the scope of zenith angle in the controlling in the heart and measures interval angles;
S3: place reference white plate on loading turntable, test unit runs automatically, the spectrum multi-angle information of the blank of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S4: drop target sample on loading turntable, test unit runs automatically, the spectrum multi-angle information of the target sample of measuring gage orientation and zenith angle, in each measuring position, control center sends the change-over switch in instruction control sniffer, imports the photosignal of selected passage into data acquisition unit and measures;
S5: the signal that S3 and S4 step obtains is carried out Gauss curve fitting by control software design automatically, obtains the value on Gauss summit;
S6: control software design is according to bidirectional reflectance factor formulae discovery spectrum multi-angle information.
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| CN109115689A (en) * | 2018-10-10 | 2019-01-01 | 鲁东大学 | Measuring device in a kind of atural object bidirectional reflectance room |
| CN110426374A (en) * | 2019-07-31 | 2019-11-08 | 武昌理工学院 | A kind of remote light sensation measurement analysis device |
| CN112858189A (en) * | 2021-02-24 | 2021-05-28 | 深圳市太赫兹科技创新研究院有限公司 | Automatically controlled subassembly and spectrum appearance of spectrum appearance |
| CN113311408A (en) * | 2021-07-07 | 2021-08-27 | 中国地质大学（武汉） | Radiation correction method and device for hyperspectral laser radar |
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| CN105137416B (en) | 2018-08-28 |
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