CN111174913A - Handheld miniature intelligent hyperspectral imager and calibration and imaging method thereof - Google Patents
Handheld miniature intelligent hyperspectral imager and calibration and imaging method thereof Download PDFInfo
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0216—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using light concentrators or collectors or condensers
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0256—Compact construction
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- G01J3/02—Details
- G01J3/0272—Handheld
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
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- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
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Abstract
The invention discloses a handheld miniature intelligent hyperspectral imager, which comprises a shell with a cubic structure, and a spectrum measurement module, an information acquisition and processing module, a light source device and a battery module which are arranged in the shell, wherein the information acquisition and processing module is positioned at the upper part in the shell, and the spectrum measurement module, the light source device and the battery module are arranged at the lower part in the shell; the information acquisition and processing module is connected with the spectrum measurement module, the light source device and the battery module. The handheld miniature intelligent hyperspectral imager has the characteristics of small volume, light weight, low energy consumption, low cost, portability, high precision and rich functions, can be popularized and applied in daily life, can acquire hyperspectral data of a target object at any time and any place, is compatible with a mobile terminal and a data cloud, and can transmit the hyperspectral data to the mobile terminal for analysis and processing; and the data can also be transmitted to a data cloud end, a standard spectrum library is established, and a comparison standard is provided for hyperspectral data analysis.
Description
Technical Field
The invention relates to the technical field of spectral imaging, in particular to a handheld miniature intelligent hyperspectral imager and a calibration and imaging method thereof.
Background
The fine detection and identification of the target spectrum is an important advantage of hyperspectral application. The principle is that a target optical signal is further subdivided into hundreds of continuous and fine spectral signals through a spectrometer to form a typical spectral characteristic curve, different ground objects have different spectral characteristic curves, and fingerprint type fine identification can be performed on different ground objects, atmospheric transmission characteristics and gas components by means of a standard spectrum library. At present, hyperspectrum obtains favorable results in the fields of resource exploration, environmental disaster reduction, fine agriculture, smart cities and the like, dozens of hyperspectral satellites are launched at home and abroad, and particularly, the hyperspectrum is greatly promoted to advance from practicality to business along with the successful launching of a civil high-resolution series GF-5 hyperspectral satellite and the subsequent continuous orbit entering work of a plurality of satellites.
The satellite hyperspectral remote sensing can realize global large-range traversal monitoring, the scanning monitoring efficiency is high, but the ground resolution is about several meters to dozens of meters due to the limitation of factors such as the height of the orbit, the caliber of a load and the like, and the requirement of ground specific small target fine observation cannot be met. In addition, due to the limitation of the orbit, the satellite-borne hyperspectral imager is difficult to perform spectral measurement on targets in a specific area, particularly indoors and the like anytime and anywhere.
At present, small-size high spectrum appearance generally falls into two types, single camera lens, color separation piece subchannel type and many camera lenses, filter beam split type, and camera lens, color separation piece subchannel type spectrum appearance volume weight are big, generally are used for the external field to use, and aviation remote sensing then need carry on all kinds of aviation aircraft, and many camera lenses, filter beam split type spectrum appearance benefit from the development of detector and microfilter technique, obtain great optimization in the aspect of volume, weight, but the price is expensive, and difficult popularization daily life uses.
Disclosure of Invention
The handheld miniature intelligent hyperspectral imager has the characteristics of small volume, light weight, low energy consumption, low cost, easiness in carrying and the like, can be popularized in daily life application, can acquire hyperspectral data of a target object at any time and any place, is compatible with a mobile terminal and a data cloud, can transmit the hyperspectral data to mobile terminal software for analysis and processing of the hyperspectral data, and can also transmit the data to the data cloud to establish a standard spectrum library so as to provide a comparison standard for hyperspectral data analysis.
Therefore, the invention adopts the following technical scheme:
a hand-held miniature intelligent hyperspectral imager is disclosed, as shown in fig. 1, and comprises a housing 1 with a cubic structure, and a spectrum measurement module 2, an information acquisition and processing module 3, a light source device 4 and a battery module 5 which are arranged in the housing, wherein the information acquisition and processing module 3 is positioned at the upper part in the housing 1, and the spectrum measurement module 2, the light source device 4 and the battery module 5 are arranged at the lower part in the housing 1; the information acquisition and processing module 3 is connected with the spectrum measuring module 2, the light source device 4 and the battery module 5; the lower side of the shell 1 is provided with a light inlet aperture 6 and a light outlet aperture 7, and the light inlet aperture 6 and the light outlet aperture 7 are both provided with protective glass; the light entrance aperture 6 on the shell 1 is aligned with the front opening of the spectrum measuring module 2, the shell 1 is connected with a first cover plate 9 through a first rotating shaft 8, the first cover plate 9 is matched with the light entrance aperture 6, and the inner side of the first cover plate 9 is provided with a diffuse reflection plate 10; the light-emitting aperture 7 on the shell 1 is aligned with the light source device 4, the shell 1 is connected with a second cover plate 12 through a second rotating shaft connection 11, the second cover plate 12 is matched with the light-emitting aperture 7, and a reflector 13 is arranged on the inner side of the second cover plate 12; the first cover plate 9 and the second cover plate 12 are in positive phase correspondence, and the first rotating shaft 8 and the second rotating shaft 11 are both provided with corner scribed lines; the lower side of the shell 1 is also provided with a USB transmission port 14 and a power supply charging port 15, and the battery module 5 is connected with the USB transmission port 14 and the power supply charging port 15 of the shell 1; a starting button 16 and a light source button 17 are arranged on the upper right side outside the shell 1, and the starting button 16 is connected with the battery module 5 and the information acquisition and processing module 3 and used for controlling the on-off of the hyperspectral imager; the light source button 17 is connected with the light source module 4 and controls the light source to be switched on and off;
as shown in fig. 2, the spectrum measuring module 2 includes a light collecting cylinder 21 and a detector 22, the detector 22 is connected to the rear side of the light collecting cylinder 21, the light collecting cylinder 21 is a conical cylinder with a certain cone angle, as shown in fig. 2 and 3, the detector 22 adopts an area array detector, which includes a × B pixels 221, and the area array detector is divided into N spectrum channels according to a × B pixels, where a is less than a, and B is less than B; an optical filter 222 with a certain wave band is correspondingly adhered to each spectral channel;
after being collected by the light collecting cylinder, targets in an observation field uniformly irradiate each spectral channel filter of the detector, and a x b pixels in each spectral channel respectively acquire spectral information DN under corresponding filter wave bands1、DN2、DN3、……DNa×bAnd finally, obtaining the spectral data of the target under the corresponding wave band through the equalization processing of the information obtaining and processing module:
the spectral measurement module adopts the design of no lens, directly adopt a light-collecting cylinder to link up the detector, can have effectual reduce cost and the integrated degree of difficulty, in addition still adopt the area array detector, set up N spectral channel on the detector, the light filter of certain wave band is pasted to correspondence on every spectral channel, make every wave band all correspond and have a plurality of pixels, a plurality of pixels acquire the spectral information under the same wave band jointly, rethread information acquisition and processing module homogenization treatment acquire the spectral data of target under corresponding the wave band, realize the observation homogenization, and the random noise of elimination imager that can be fine and the dark level of effective reduction detector.
The light-collecting cylinder 21 sets the imager spectral measurement area by setting different angles of the cone angle 211, and as shown in fig. 4, the light-collecting cylinders with different cone angles form different imager spectral measurement areas; wherein the cone angle is preferably 1 ° -15 °; as shown in fig. 4 and 5, the inner wall of the light collecting cylinder is further provided with an inclined stray light eliminating ring 212, and the inclined angle of the stray light eliminating ring 212 is preferably 30-60 degrees; after light passes through the inclined stray light eliminating ring 212, a spectrum collection view field can be well limited, stray light influence introduced by an invalid view field is eliminated, and the detection signal-to-noise ratio of the imager is improved.
The detector 22 and the optical filter 222 on the spectral channel thereof can be set to an ultraviolet band, a visible band, a short wave infrared band, a medium wave infrared band, a long wave infrared band, or a combination of more than a plurality of bands as required, and are subdivided into tens to hundreds of spectral channels with different bandwidths or the same bandwidth.
As shown in fig. 6, the light source device 4 includes a standard light source 41, a collimating and dodging lamp shade 42, a light source temperature measuring device 43 and a current measuring device 44, the standard light source 41 is located at a focus of the collimating and dodging lamp shade 42, and light of the standard light source 41 is reflected by the collimating and dodging lamp shade 42 to realize parallel dodging output; the light source temperature measuring device 43 and the current measuring device 44 are connected with the standard light source 41 and used for calibrating the intensity of the standard light source 41.
As shown in fig. 7, the section of the corner score line of the first rotating shaft 8 and the second rotating shaft 11 is 0 ° to 180 °, and the scale values are set to be 0 °, 45 ° to 90 °, 135 ° and 180 °.
As shown in fig. 8, the information acquiring and processing module includes an FPGA module, a detector driving module, a data caching and storing module, a communication and data transmission module, a calibration module, and a temperature measuring module:
the FPGA module is a main control module, provides a correct working time sequence for the operation of the hyperspectral imager, and processes and transmits the acquired spectral data;
the detector driving module is connected with the spectrum measuring module and the FPGA main control module, and is used for acquiring spectrum data of the detector of the spectrum measuring module according to a working time sequence provided by the FPGA module and transmitting the spectrum data to the FPGA main control module;
the data caching and storing module is connected with the FPGA main control module, caches the acquired spectral data according to the instruction of the FPGA module, and can read the read image data;
the communication and data transmission module is connected with the FPGA main control module and transmits the spectral data to the mobile terminal or the data cloud end according to the instruction of the FPGA module; the communication and data transmission module comprises a Bluetooth transmission module wifi transmission module, a zigbee transmission module and a USB transmission module, and the USB transmission module is connected with a USB transmission port;
the calibration module is connected with the light source device and the FPGA main control module, and provides a stable calibration light source for the acquisition of the ground feature spectrum information according to the instruction of the FPGA module, so that the calibration precision of the spectrometer is improved;
the temperature measurement module is integrated with a temperature sensor and is connected with the FPGA main control module, an environment temperature signal is obtained according to an instruction of the FPGA module, and the temperature signal is stored, transmitted and analyzed.
As shown in fig. 8, the power module adopts a storage battery, connects the spectrum measuring module, the information acquiring and processing module and the light source device, and includes three working modes:
1) the battery pack is charged through external charging input of a power supply charging port, and power is supplied to the spectrum measuring module, the information acquiring and processing module and an internal circuit of the light source device;
2) the system is characterized in that external charging input is not required, and the stored electric quantity is used for supplying power to the internal circuits of the spectrum measuring module, the information acquisition and processing module and the light source device;
3) and the stored electric quantity is used for charging the external mobile terminal through the USB transmission port.
As shown in fig. 9, a liquid crystal display 18 is disposed on the front panel of the imager housing 1, and the display back panel 18 is connected to the spectrum measuring module 2, the information acquiring and processing module 3, the light source device 4, and the battery module 5. The spectrum measurement module 2 collects target spectrum information, transmits the target spectrum information to the information acquisition and processing module for processing, and then reads the target spectrum information through the liquid crystal display, wherein the liquid crystal display is also used for displaying the switch of the light source device 4 and the capacity of the battery module 5.
Wherein, as shown in fig. 10, hyperspectral imager is configured with temperature sensing pen 19, temperature sensing pen 19 includes penholder 191, the bottom is equipped with temperature sensing device 192 in the penholder, the top is equipped with bluetooth transmission device 193 in the penholder, temperature sensing device 192 passes through wire 194 and is connected with bluetooth transmission device 193. The temperature sensing pen can monitor the temperature of the target object at any time and transmit the temperature to the hyperspectral imager through the Bluetooth transmission device, and the hyperspectral imager inverts the emissivity curve of the target object according to the acquired spectral data of the target object and the surface temperature of the target object.
The invention also provides a calibration method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
in order to utilize sunlight to carry out self-calibration on the hyperspectral imager, the first cover plate 9 is opened to 45 degrees, the second cover plate 12 is closed, the diffuse reflection plate 10 on the first cover plate 9 is utilized to reflect sunlight to enter the light entrance aperture 6 of the hyperspectral imager, self-calibration is carried out on the hyperspectral imager, and calibration data are obtained.
The invention also provides another calibration method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
the hyperspectral imager is self-calibrated by utilizing the output light of the standard light source 41, the first cover plate 9 is opened to 45 degrees, the second cover plate 12 is opened to 45 degrees, the light output by the standard light source 41 is reflected to the diffuse reflection plate 10 on the first cover plate 9 by utilizing the reflector 13 on the second cover plate 12, the diffuse reflection plate 10 reflects the light output by the standard light source 41 to enter the light entrance aperture 6 of the hyperspectral imager, the hyperspectral imager is self-calibrated, and calibration data are obtained.
The invention also provides an imaging method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
when the light is sufficient, the second cover plate 12 is closed; opening the first cover plate 9 to 180 degrees, and enabling the light entrance aperture 6 of the hyperspectral imager to be opposite to the target object;
the target object is collected by the spectrum measuring module, processed by the information acquiring and processing module to form spectrum data, and transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the acquired spectrum data to form a spectrum curve, acquire object spectrum information and establish a personalized spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data is stored and transmitted through the data cloud end; or a standard spectrum library is established at the data cloud end to provide data remote support for the user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
The invention also provides an imaging method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
when the light is insufficient, adjusting the angle of the second cover plate 12 to make the output light of the standard light source 41 pass through the reflector 13 on the second cover plate 12 and strike on the target object for light supplement; opening the first cover plate 9 to 180 degrees, and enabling the light entrance aperture 6 of the hyperspectral imager to be opposite to the target object;
the target object is collected by the spectrum measuring module, processed by the information acquiring and processing module to form spectrum data, and transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the acquired spectrum data to form a spectrum curve, acquire object spectrum information and establish a personalized spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data is stored and transmitted through the data cloud end; or a standard spectrum library is established at the data cloud end to provide data remote support for the user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
The invention also provides a method for measuring the hyperspectral reflectivity of the surface of the target object based on the handheld miniature intelligent hyperspectral imager, as shown in fig. 16, the method comprises the following steps:
under the background of sunlight, closing the second cover plate 12, opening the first cover plate 9 to 180 degrees, enabling the light entrance aperture 6 of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; then, the light entrance aperture 6 of the hyperspectral imager is opposite to the sun, and sunlight ray spectrum data are obtained; then, aiming at the target object under the irradiation of sunlight, acquiring the spectral data of the target object under the irradiation of sunlight by using the light entrance aperture 6 of the hyperspectral imager;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the irradiation of sunlight are removed from the acquired background spectral data of the target object and the acquired sunlight spectral data, the spectral data on the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process and invert the acquired spectral data into a curve of the hyperspectral emissivity on the surface of the target object.
The invention also provides a method for measuring the hyperspectral reflectivity of the surface of the target object based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
under a dark background, closing the second cover plate 12, opening the first cover plate 9 to 180 degrees, enabling the light entrance aperture 6 of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; opening the second cover plate 12 to 45 degrees, adjusting the first cover plate 9 to 45 degrees, reflecting the light rays output by the standard light source 41 to the diffuse reflection plate 10 on the first cover plate 9 by utilizing the reflector 13 on the second cover plate 12, reflecting the light rays output by the standard light source 41 into the light entrance aperture 6 of the hyperspectral imager by the diffuse reflection plate 10, and acquiring the spectrum data of the light rays output by the standard light source 41; then adjusting the angle of the second cover plate 12 to make the light output by the standard light source 41 pass through the reflector 13 on the second cover plate 12 and strike on the target object for light supplement, opening the first cover plate 9 to 180 degrees, making the light entrance aperture 6 of the hyperspectral imager just face the target object supplemented with light from the standard light source 41, and obtaining the spectral data of the target object supplemented with light from the standard light source 41;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the light supplement of the standard light source are removed from the acquired background spectral data of the target object and the acquired spectral data of the light output by the standard light source, the spectral data of the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process the acquired spectral data to invert a curve of the hyperspectral emissivity of the surface of the target object.
By adopting the technical scheme, the invention has the following advantages:
1) the high-spectrum imager has the characteristics of small volume, light weight, low energy consumption, low cost, easiness in carrying and the like by highly integrating all the modules, can be popularized in daily life application, and can acquire high-spectrum data of a target object at any time and any place; the hyperspectral data can be transmitted to the mobile terminal through the communication and data transmission module, and the hyperspectral data can be analyzed and processed in real time; the system can also be compatible with a data cloud end, high spectrum data are transmitted to the data cloud end, a standard spectrum library is established, and quantitative water content monitoring can be realized by means of a spectrum curve of a water vapor absorption band in the standard spectrum library; analyzing the absorption scattering condition of a blue-ultraviolet waveband by means of a spectrum curve in a standard spectrum library to obtain an ultraviolet index, an atmospheric visibility index and an air quality index; the standard spectrum library is used for analyzing the characteristics of an object, has the characteristic of distinguishing essence through the surface, and can be applied to water quality monitoring, food freshness monitoring, crop pesticide residue monitoring, indoor light source spectrum intensity comfort monitoring, currency authenticity monitoring and the like;
2) the inclined stray light eliminating ring is arranged on the inner wall of the light collecting cylinder, so that the spectrum collecting field of view can be well limited, the influence of stray light introduced by an invalid field of view is eliminated, and the detection signal-to-noise ratio of the handheld spectrometer is improved;
3) a collimation dodging lampshade is arranged at the periphery of the standard light source, so that the light of the standard light source can realize parallel dodging output through the collimation dodging lampshade;
4) the spectral measurement module detector adopts an area array detector and adopts a plurality of spectral channels according to lambda0The bandwidth difference is respectively and correspondingly pasted with an optical filter with one wavelength, each spectral channel comprises a plurality of pixels, and continuous spectral data can be obtained by obtaining the spectral data of each pixel under the spectral channel under the spectral wavelength lambda. The spectrum data acquired by the pixels in each spectrum channel is averaged by the information acquisition and processing module, and then a spectrum curve is output, so that the random noise of the spectrometer can be eliminated and the dark level of the detector can be reduced.
5) The hyperspectral imager takes the sunlight as a main light source and is assisted by a standard light source as a supplement light source, so that the hyperspectral imager can be free from the influence of external light in any environment and can be calibrated and imaged at any time;
6) the built-in high-capacity power supply module can be compatible with external equipment for charging, wireless use of the hyperspectral imager is realized, and power is supplied to an external mobile terminal under an emergency condition;
7) the inside accurate temperature measurement module that is provided with of hyperspectral imager, measurement ambient temperature that can be sensitive.
Drawings
FIG. 1 is a schematic diagram of the internal structure of the hand-held micro intelligent hyperspectral imager
FIG. 2 is a schematic diagram of a spectrum measurement module of the handheld micro intelligent hyperspectral imager
FIG. 3 is a schematic plane view of a hand-held micro intelligent hyperspectral imager detector structure of the invention
FIG. 4 is a schematic diagram showing the comparison of the observation areas of the light-collecting cylinder of the handheld micro intelligent hyperspectral imager at different cone angle angles
FIG. 5 is a schematic view of the sectional structure of the light-collecting tube of the hand-held micro intelligent hyperspectral imager
FIG. 6 is a schematic structural diagram of a light source device of the handheld micro intelligent hyperspectral imager of the invention
FIG. 7 is a schematic view of the structures of the upper corner angles of the first rotating shaft and the second rotating shaft of the handheld micro intelligent hyperspectral imager according to the invention
FIG. 8 is a schematic structural diagram of an information acquisition and processing module and a power module of the handheld micro intelligent hyperspectral imager of the invention
FIG. 9 is a schematic view of the appearance structure of the handheld micro intelligent hyperspectral imager
FIG. 10 is a schematic structural diagram of a temperature sensing pen configured in the handheld micro intelligent hyperspectral imager of the invention
FIG. 11 is a schematic diagram of a calibration method for a handheld micro intelligent hyperspectral imager in an embodiment of the invention
FIG. 12 is a schematic diagram of a calibration method for a handheld micro intelligent hyperspectral imager according to another embodiment of the invention
FIG. 13 is a schematic diagram of an imaging method of a handheld micro intelligent hyperspectral imager in an embodiment of the invention
FIG. 14 is a schematic diagram of an imaging method of a handheld micro intelligent hyperspectral imager according to another embodiment of the invention
FIG. 15 is a schematic diagram of the application of the spectral data of the handheld micro intelligent hyperspectral imager
FIG. 16 is a schematic flow chart of a method for measuring the hyperspectral reflectivity of the surface of a target object under the background of sunlight irradiation by using the handheld miniature intelligent hyperspectral imager of the invention
FIG. 17 is a schematic flow chart of a method for measuring the hyperspectral reflectivity of the surface of a target object under a dark background of a handheld micro intelligent hyperspectral imager in accordance with the invention
Detailed Description
In order that the objects, features and advantages of the invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in detail in order to provide a thorough understanding of the invention, but which may be carried out in other ways than those described. Accordingly, the invention is not limited by the specific implementations disclosed below.
A hand-held miniature intelligent hyperspectral imager is disclosed, as shown in fig. 1, and comprises a housing 1 with a cubic structure, and a spectrum measurement module 2, an information acquisition and processing module 3, a light source device 4 and a battery module 5 which are arranged in the housing, wherein the information acquisition and processing module 3 is positioned at the upper part in the housing 1, and the spectrum measurement module 2, the light source device 4 and the battery module 5 are arranged at the lower part in the housing 1; the information acquisition and processing module 3 is connected with the spectrum measuring module 2, the light source device 4 and the battery module 5; the lower side of the shell 1 is provided with a light inlet aperture 6 and a light outlet aperture 7, and the light inlet aperture 6 and the light outlet aperture 7 are both provided with protective glass; the light entrance aperture 6 on the shell 1 is aligned with the front opening of the spectrum measuring module 2, the shell 1 is connected with a first cover plate 9 through a first rotating shaft 8, the first cover plate 9 is matched with the light entrance aperture 6, and the inner side of the first cover plate 9 is provided with a diffuse reflection plate 10; the light-emitting aperture 7 on the shell 1 is aligned with the light source device 4, the shell 1 is connected with a second cover plate 12 through a second rotating shaft connection 11, the second cover plate 12 is matched with the light-emitting aperture 7, and a reflector 13 is arranged on the inner side of the second cover plate 12; the first cover plate 9 and the second cover plate 12 are in positive phase correspondence, and the first rotating shaft 8 and the second rotating shaft 11 are both provided with corner scribed lines; the lower side of the shell 1 is also provided with a USB transmission port 14 and a power supply charging port 15, and the battery module 5 is connected with the USB transmission port 14 and the power supply charging port 15 of the shell 1; a starting button 16 and a light source button 17 are arranged on the upper right side outside the shell 1, and the starting button 16 is connected with the battery module 5 and the information acquisition and processing module 3 and used for controlling the on-off of the hyperspectral imager; the light source button 17 is connected with the light source module 4 and controls the light source to be switched on and off;
as shown in fig. 2, the spectrum measuring module 2 includes a light collecting cylinder 21 and a detector 22, the detector 22 is connected to the rear side of the light collecting cylinder 21, the light collecting cylinder 21 is a conical cylinder with a certain cone angle, as shown in fig. 2 and 3, the detector 22 adopts an area array detector, which includes a × B pixels 221, and the area array detector is divided into N spectrum channels according to a × B pixels, where a is less than a, and B is less than B; an optical filter 222 with a certain wave band is correspondingly adhered to each spectral channel;
after being collected by the light collecting cylinder, targets in an observation field uniformly irradiate each spectral channel filter of the detector, and a x b pixels in each spectral channel respectively acquire spectral information DN under corresponding filter wave bands1、DN2、DN3、……DNa×bAnd finally, obtaining the spectral data of the target under the corresponding wave band through the equalization processing of the information obtaining and processing module:
the spectral measurement module adopts the design of no lens, directly adopt a light-collecting cylinder to link up the detector, can have effectual reduce cost and the integrated degree of difficulty, in addition still adopt the area array detector, set up N spectral channel on the detector, the light filter of certain wave band is pasted to correspondence on every spectral channel, make every wave band all correspond and have a plurality of pixels, a plurality of pixels acquire the spectral information under the same wave band jointly, rethread information acquisition and processing module homogenization treatment acquire the spectral data of target under corresponding the wave band, realize the observation homogenization, and the random noise of elimination imager that can be fine and the dark level of effective reduction detector.
The light-collecting cylinder 21 sets the imager spectral measurement area by setting different angles of the cone angle 211, and as shown in fig. 4, the light-collecting cylinders with different cone angles form different imager spectral measurement areas; wherein the cone angle is preferably 1 ° -15 °; as shown in fig. 4 and 5, the inner wall of the light collecting cylinder is further provided with an inclined stray light eliminating ring 212, and the inclined angle of the stray light eliminating ring 212 is preferably 30-60 degrees; after light passes through the inclined stray light eliminating ring 212, a spectrum collection view field can be well limited, stray light influence introduced by an invalid view field is eliminated, and the detection signal-to-noise ratio of the imager is improved.
The detector 22 and the optical filter 222 on the spectral channel thereof can be set to an ultraviolet band, a visible band, a short wave infrared band, a medium wave infrared band, a long wave infrared band, or a combination of more than a plurality of bands as required, and are subdivided into tens to hundreds of spectral channels with different bandwidths or the same bandwidth.
As shown in fig. 6, the light source device 4 includes a standard light source 41, a collimating and dodging lamp shade 42, a light source temperature measuring device 43 and a current measuring device 44, the standard light source 41 is located at a focus of the collimating and dodging lamp shade 42, and light of the standard light source 41 is reflected by the collimating and dodging lamp shade 42 to realize parallel dodging output; the light source temperature measuring device 43 and the current measuring device 44 are connected with the standard light source 41 and used for calibrating the intensity of the standard light source 41.
As shown in fig. 7, the section of the corner score line of the first rotating shaft 8 and the second rotating shaft 11 is 0 ° to 180 °, and the scale values are set to be 0 °, 45 ° to 90 °, 135 ° and 180 °.
As shown in fig. 8, the information acquiring and processing module includes an FPGA module, a detector driving module, a data caching and storing module, a communication and data transmission module, a calibration module, and a temperature measuring module:
the FPGA module is a main control module, provides a correct working time sequence for the operation of the hyperspectral imager, and processes and transmits the acquired spectral data;
the detector driving module is connected with the spectrum measuring module and the FPGA main control module, and is used for acquiring spectrum data of the detector of the spectrum measuring module according to a working time sequence provided by the FPGA module and transmitting the spectrum data to the FPGA main control module;
the data caching and storing module is connected with the FPGA main control module, caches the acquired spectral data according to the instruction of the FPGA module, and can read the read image data;
the communication and data transmission module is connected with the FPGA main control module and transmits the spectral data to the mobile terminal or the data cloud end according to the instruction of the FPGA module; the communication and data transmission module comprises a Bluetooth transmission module wifi transmission module, a zigbee transmission module and a USB transmission module, and the USB transmission module is connected with a USB transmission port;
the calibration module is connected with the light source device and the FPGA main control module, and provides a stable calibration light source for the acquisition of the ground feature spectrum information according to the instruction of the FPGA module, so that the calibration precision of the spectrometer is improved;
the temperature measurement module is integrated with a temperature sensor and is connected with the FPGA main control module, an environment temperature signal is obtained according to an instruction of the FPGA module, and the temperature signal is stored, transmitted and analyzed.
As shown in fig. 8, the power module adopts a storage battery, connects the spectrum measuring module, the information acquiring and processing module and the light source device, and includes three working modes:
1) the battery pack is charged through external charging input of a power supply charging port, and power is supplied to the spectrum measuring module, the information acquiring and processing module and an internal circuit of the light source device;
2) the system is characterized in that external charging input is not required, and the stored electric quantity is used for supplying power to the internal circuits of the spectrum measuring module, the information acquisition and processing module and the light source device;
3) and the stored electric quantity is used for charging the external mobile terminal through the USB transmission port.
As shown in fig. 9, a liquid crystal display 18 is disposed on the front panel of the imager housing 1, and the display back panel 18 is connected to the spectrum measuring module 2, the information acquiring and processing module 3, the light source device 4, and the battery module 5. The spectrum measurement module 2 collects target spectrum information, transmits the target spectrum information to the information acquisition and processing module for processing, and then reads the target spectrum information through the liquid crystal display, wherein the liquid crystal display is also used for displaying the switch of the light source device 4 and the capacity of the battery module 5.
Wherein, as shown in fig. 10, hyperspectral imager is configured with temperature sensing pen 19, temperature sensing pen 19 includes penholder 191, the bottom is equipped with temperature sensing device 192 in the penholder, the top is equipped with bluetooth transmission device 193 in the penholder, temperature sensing device 192 passes through wire 194 and is connected with bluetooth transmission device 193. The temperature sensing pen can monitor the temperature of the target object at any time and transmit the temperature to the hyperspectral imager through the Bluetooth transmission device, and the hyperspectral imager inverts the emissivity curve of the target object according to the acquired spectral data of the target object and the surface temperature of the target object.
The invention also provides a calibration method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
in order to utilize sunlight to carry out self-calibration on the hyperspectral imager, the first cover plate 9 is opened to 45 degrees, the second cover plate 12 is closed, the diffuse reflection plate 10 on the first cover plate 9 is utilized to reflect sunlight to enter the light entrance aperture 6 of the hyperspectral imager, self-calibration is carried out on the hyperspectral imager, and calibration data are obtained.
The invention also provides another calibration method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
the hyperspectral imager is self-calibrated by utilizing the output light of the standard light source 41, the first cover plate 9 is opened to 45 degrees, the second cover plate 12 is opened to 45 degrees, the light output by the standard light source 41 is reflected to the diffuse reflection plate 10 on the first cover plate 9 by utilizing the reflector 13 on the second cover plate 12, the diffuse reflection plate 10 reflects the light output by the standard light source 41 to enter the light entrance aperture 6 of the hyperspectral imager, the hyperspectral imager is self-calibrated, and calibration data are obtained.
The invention also provides an imaging method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
when the light is sufficient, the second cover plate 12 is closed; opening the first cover plate 9 to 180 degrees, and enabling the light entrance aperture 6 of the hyperspectral imager to be opposite to the target object;
the target object is collected by the spectrum measuring module, processed by the information acquiring and processing module to form spectrum data, and transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the acquired spectrum data to form a spectrum curve, acquire object spectrum information and establish a personalized spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data is stored and transmitted through the data cloud end; or a standard spectrum library is established at the data cloud end to provide data remote support for the user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
The invention also provides an imaging method based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
when the light is insufficient, adjusting the angle of the second cover plate 12 to make the output light of the standard light source 41 pass through the reflector 13 on the second cover plate 12 and strike on the target object for light supplement; opening the first cover plate 9 to 180 degrees, and enabling the light entrance aperture 6 of the hyperspectral imager to be opposite to the target object;
the target object is collected by the spectrum measuring module, processed by the information acquiring and processing module to form spectrum data, and transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the acquired spectrum data to form a spectrum curve, acquire object spectrum information and establish a personalized spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data is stored and transmitted through the data cloud end; or a standard spectrum library is established at the data cloud end to provide data remote support for the user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
The invention also provides a method for measuring the hyperspectral reflectivity of the surface of the target object based on the handheld miniature intelligent hyperspectral imager, as shown in fig. 16, the method comprises the following steps:
under the background of sunlight, closing the second cover plate 12, opening the first cover plate 9 to 180 degrees, enabling the light entrance aperture 6 of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; then, the light entrance aperture 6 of the hyperspectral imager is opposite to the sun, and sunlight ray spectrum data are obtained; then, aiming at the target object under the irradiation of sunlight, acquiring the spectral data of the target object under the irradiation of sunlight by using the light entrance aperture 6 of the hyperspectral imager;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the irradiation of sunlight are removed from the acquired background spectral data of the target object and the acquired sunlight spectral data, the spectral data on the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process and invert the acquired spectral data into a curve of the hyperspectral emissivity on the surface of the target object.
The invention also provides a method for measuring the hyperspectral reflectivity of the surface of the target object based on the handheld miniature intelligent hyperspectral imager, which comprises the following steps of:
under a dark background, closing the second cover plate 12, opening the first cover plate 9 to 180 degrees, enabling the light entrance aperture 6 of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; opening the second cover plate 12 to 45 degrees, adjusting the first cover plate 9 to 45 degrees, reflecting the light rays output by the standard light source 41 to the diffuse reflection plate 10 on the first cover plate 9 by utilizing the reflector 13 on the second cover plate 12, reflecting the light rays output by the standard light source 41 into the light entrance aperture 6 of the hyperspectral imager by the diffuse reflection plate 10, and acquiring the spectrum data of the light rays output by the standard light source 41; then adjusting the angle of the second cover plate 12 to make the light output by the standard light source 41 pass through the reflector 13 on the second cover plate 12 and strike on the target object for light supplement, opening the first cover plate 9 to 180 degrees, making the light entrance aperture 6 of the hyperspectral imager just face the target object supplemented with light from the standard light source 41, and obtaining the spectral data of the target object supplemented with light from the standard light source 41;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the light supplement of the standard light source are removed from the acquired background spectral data of the target object and the acquired spectral data of the light output by the standard light source, the spectral data of the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process the acquired spectral data to invert a curve of the hyperspectral emissivity of the surface of the target object.
The handheld miniature intelligent hyperspectral imager is designed according to the following performance indexes:
1) volume: 145mm × 75mm × 21.5 mm;
2) weight: less than 200 g;
3) spectral range: 400-1000 nm; a256 × 128 area array CMOS detector is adopted, 61 spectrum channels are formed according to 10 × 10 pixels, narrow-band filters of 400nm, 410nm, 420nm and … … 1000nm are respectively and correspondingly attached to the spectrum channels according to 10nm bandwidth difference, spectrum data under the spectral wavelength of the filters corresponding to the spectrum channels are respectively acquired by the 10 × 10 pixels of each spectrum channel, and continuous spectrum data of 400-1000nm can be acquired. The spectrum data acquired by the pixels in each spectrum channel is averaged by the information acquisition and processing module, and then a spectrum curve is output, so that the random noise of the spectrometer can be eliminated and the dark level of the detector can be reduced.
4) Spectral resolution: 10-20 nm;
5) observation area: 40-50cm2@100cm；
6) And (3) observation precision: the average can reach 1%;
7) temperature measurement accuracy: better than 0.1 degree;
8) humidity measurement accuracy: better than 90 percent;
9) transmittance of cover glass: is superior to 95 percent;
10) the continuous working time of the battery capacity of the power module is more than 12 h.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (16)
1. The utility model provides a handheld miniature intelligent hyperspectral imager which characterized in that: the device comprises a shell with a cubic structure, and a spectrum measuring module, an information acquiring and processing module, a light source device and a battery module which are arranged in the shell, wherein the information acquiring and processing module is positioned at the upper part in the shell, and the spectrum measuring module, the light source device and the battery module are arranged at the lower part in the shell; the information acquisition and processing module is connected with the spectrum measurement module, the light source device and the battery module; the lower side of the shell is provided with a light inlet aperture and a light outlet aperture, and protective glass is arranged on the light inlet aperture and the light outlet aperture; the light entrance aperture on the shell is aligned with the front opening of the spectral measurement module, the shell is connected with a first cover plate through a first rotating shaft, the first cover plate is matched with the light entrance aperture, and the inner side of the first cover plate is provided with a diffuse reflection plate; the light-emitting aperture on the shell is aligned with the light source device, the shell is connected with a second cover plate through a second rotating shaft, the second cover plate is matched with the light-emitting aperture, and a reflector is arranged on the inner side of the second cover plate; the first cover plate and the second cover plate are in positive phase correspondence, and the first rotating shaft and the second rotating shaft are both provided with corner scribed lines; the lower side of the shell is also provided with a USB transmission port and a power supply charging port, and the battery module is connected with the USB transmission port and the power supply charging port of the shell; a starting button and a light source button are arranged on the upper right side outside the shell, and the starting button is connected with the battery module and the information acquisition and processing module and controls the high-spectrum imager to be started and shut down; the light source button is connected with the light source module and controls the light source switch.
2. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the spectrum measurement module comprises a light-collecting cylinder and a detector, the detector is connected to the rear side of the light-collecting cylinder, the light-collecting cylinder is a conical cylinder with a certain cone angle, the detector adopts an area array detector and comprises A multiplied by B pixels, the area array detector is divided into N spectrum channels according to a multiplied by B pixels, wherein a is less than A, and B is less than B; a filter with a certain wave band is respectively stuck on each spectral channel;
after being collected by a light collecting cylinder, targets in an observation field of view uniformly irradiate onto each spectral channel filter of the detector, and a x b pixels in each spectral channel respectively acquire spectral data DN under corresponding filter wave bands1、DN2、DN3、……DNa×bAnd finally, obtaining the spectral data of the target under the corresponding wave band through the equalization processing of the information obtaining and processing module:
3. the hand-held miniature intelligent hyperspectral imager of claim 2, wherein: the light-collecting cylinder is used for setting the spectral measurement area of the imager by setting different cone angle angles; the cone angle is preferably 1-15 °; the inner wall of the light collecting cylinder is also provided with an inclined impurity eliminating light ring, and the inclined angle of the impurity eliminating light ring is preferably 30-60 degrees.
4. The hand-held miniature intelligent hyperspectral imager of claim 2, wherein: the detector and the optical filter on the spectrum channel thereof can be set into an ultraviolet band, a visible band, a short wave infrared band, a medium wave infrared band or a long wave infrared band according to requirements, and are subdivided into tens of to hundreds of spectrum channels with different bandwidths or the same bandwidth.
5. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the light source device comprises a standard light source, a collimation dodging lampshade, a light source temperature measuring device and a current measuring device, wherein the standard light source is positioned at the focus of the collimation dodging lampshade, and the light of the standard light source is reflected by the collimation dodging lampshade to realize parallel dodging output; the light source temperature measuring device and the current measuring device are connected with the standard light source.
6. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the angle scribing interval of the first rotating shaft and the second rotating shaft is 0-180 degrees, and scale values of 0 degree, 45 degrees, 90 degrees, 135 degrees and 180 degrees are set.
7. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the information acquisition and processing module comprises an FPGA module, a detector driving module, a data caching and storing module, a communication and data transmission module, a calibration module and a temperature measuring module:
the FPGA module is a main control module, provides a correct working time sequence for the operation of the hyperspectral imager, and processes and transmits the acquired spectral data;
the detector driving module is connected with the spectrum measuring module and the FPGA main control module, and is used for acquiring spectrum data of the detector of the spectrum measuring module according to a working time sequence provided by the FPGA module and transmitting the spectrum data to the FPGA main control module;
the data caching and storing module is connected with the FPGA main control module, caches the acquired spectral data according to the instruction of the FPGA module, and can read the read image data;
the communication and data transmission module is connected with the FPGA main control module and transmits the spectral data to mobile terminal software or a data cloud according to the instruction of the FPGA module; the communication and data transmission module comprises a Bluetooth transmission module wifi transmission module, a zigbee transmission module and a USB transmission module, and the USB transmission module is connected with a USB transmission port;
the calibration module is connected with the light source device and the FPGA main control module, and provides a stable calibration light source for the acquisition of the ground feature spectrum information according to the instruction of the FPGA module, so that the calibration precision of the spectrometer is improved;
the temperature measurement module is integrated with a temperature sensor and is connected with the FPGA main control module, an environment temperature signal is obtained according to an instruction of the FPGA module, and the temperature signal is stored and transmitted.
8. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the power module adopts the battery, connects spectral measurement module, information acquisition and processing module and light source device, and it includes three kinds of mode:
1) the battery pack is charged through external charging input of a power supply charging port, and power is supplied to the spectrum measuring module, the information acquiring and processing module and an internal circuit of the light source device;
2) the system is characterized in that external charging input is not required, and the stored electric quantity is used for supplying power to the internal circuits of the spectrum measuring module, the information acquisition and processing module and the light source device;
3) and the stored electric quantity is used for charging the external mobile terminal through the USB transmission port.
9. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the front panel of the imager shell is provided with a liquid crystal display, and the display back plate is connected with the spectrum measurement module, the information acquisition and processing module, the light source device and the battery module.
10. The hand-held miniature intelligent hyperspectral imager of claim 1, wherein: the hyperspectral imager is provided with a temperature sensing pen, the temperature sensing pen comprises a pen holder, a temperature sensing device is arranged at the bottom in the pen holder, a Bluetooth transmission device is arranged at the top in the pen holder, and the temperature sensing device is connected with the Bluetooth transmission device through a wire.
11. A method for self-calibration based on the handheld miniature intelligent hyperspectral imager of claims 1-10, characterized by: the method comprises the following steps:
in order to utilize sunlight to carry out self-calibration on the hyperspectral imager, the first cover plate is opened to 45 degrees, the second cover plate is closed, the diffuse reflection plate on the first cover plate is utilized to reflect sunlight to enter the light entrance aperture of the hyperspectral imager, the hyperspectral imager is subjected to self-calibration, and calibration data are obtained.
12. A self-calibration method based on the handheld miniature intelligent hyperspectral imager of claims 1-10, characterized in that: the method comprises the following steps:
the hyperspectral imager is self-calibrated by utilizing standard light source output light, the first cover plate is opened to 45 degrees, the second cover plate is opened to 45 degrees, the reflector on the second cover plate is utilized to reflect the standard light source output light to the diffuse reflection plate on the first cover plate, the diffuse reflection plate reflects the standard light source output light to enter the light entrance aperture of the hyperspectral imager, and the hyperspectral imager is self-calibrated to obtain calibration data.
13. A method for hyperspectral imaging based on a handheld miniature intelligent hyperspectral imager as claimed in claims 1-10, characterized in that: the method comprises the following steps:
when the light is sufficient, the second cover plate is closed; opening the first cover plate to 180 degrees, and enabling the light entrance aperture of the hyperspectral imager to be opposite to the target object;
the target object is measured by the spectrum measuring module, processed by the information obtaining and processing module to form spectrum data, and transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the obtained spectrum data to form a spectrum curve, obtain object spectrum information and establish a personalized spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data is stored and transmitted through the data cloud end; or a standard spectrum library is established at the data cloud end to provide data remote support for the user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
14. A method for hyperspectral imaging based on a handheld miniature intelligent hyperspectral imager as claimed in claims 1-10, characterized in that: the method comprises the following steps:
when the light is insufficient, adjusting the angle of the second cover plate to enable the light output by the standard light source to be incident on a target object through a reflector on the second cover plate for light supplement; opening the first cover plate to 180 degrees, and enabling the light entrance aperture of the hyperspectral imager to be opposite to the target object;
the target object is collected by the spectrum measuring module, processed by the information acquiring and processing module to form spectrum data, transmitted to the mobile terminal by the communication and data transmission module, and the mobile terminal can store or process the acquired spectrum data to form a spectrum curve, acquire object spectrum information and establish a spectrum database;
or the spectral data is transmitted to a data cloud end through a communication and data transmission module, and the spectral data can be stored and transmitted through the data cloud end; a standard spectrum library is established at the data cloud end to provide data remote support for a user;
the mobile terminal and the data cloud end can transmit the spectral data by using the communication mode of the mobile terminal and the data cloud end.
15. The method for measuring the hyperspectral reflectivity of the surface of the target object by using the handheld miniature intelligent hyperspectral imager is characterized by comprising the following steps of: the method comprises the following steps:
under the background of solar illumination, closing the second cover plate, opening the first cover plate to 180 degrees, enabling the light entrance aperture of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; then the light entrance aperture of the hyperspectral imager is opposite to the sun, and sunlight ray spectrum data are obtained; aiming at the target object under the irradiation of sunlight, the light entrance aperture of the hyperspectral imager acquires the spectral data of the target object under the irradiation of the sunlight;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the irradiation of sunlight are removed from the acquired background spectral data of the target object and the acquired sunlight spectral data, the spectral data on the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process and invert the acquired spectral data into a curve of the hyperspectral emissivity on the surface of the target object.
16. The method for measuring the hyperspectral reflectivity of the surface of the target object by using the handheld miniature intelligent hyperspectral imager is characterized by comprising the following steps of: the method comprises the following steps:
under a dark background, closing the second cover plate, opening the first cover plate to 180 degrees, enabling the light entrance aperture of the hyperspectral imager to face the background of the target object, and acquiring background spectrum data of the target object; opening the second cover plate to 45 degrees, adjusting the first cover plate to 45 degrees, reflecting the light output by the standard light source to the diffuse reflection plate on the first cover plate by using the reflector on the second cover plate, reflecting the light output by the standard light source into the light entrance aperture of the hyperspectral imager by using the diffuse reflection plate, and acquiring spectral data of the light output by the standard light source; adjusting the angle of the second cover plate, enabling light rays output by the standard light source to be irradiated onto the target object through a reflector on the second cover plate, supplementing light, opening the first cover plate to 180 degrees, enabling the light-entering aperture of the hyperspectral imager to be over against the target object supplemented with light by the standard light source, and obtaining spectral data of the target object supplemented with light by the standard light source;
the acquired spectral data are processed by the information acquisition and processing module, the acquired spectral data of the target object under the light supplement of the standard light source are removed from the acquired background spectral data of the target object and the acquired spectral data of the light output by the standard light source, the spectral data of the surface of the target object can be acquired, the spectral data are transmitted to the mobile terminal through the communication and data transmission module, and the mobile terminal can process the acquired spectral data to invert a curve of the hyperspectral emissivity of the surface of the target object.
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| US20190301935A1 (en) * | 2015-12-23 | 2019-10-03 | Spectricity | Device for recording spectral information |
| CN109975219A (en) * | 2017-12-27 | 2019-07-05 | 上海德运光电技术有限公司 | A kind of portable type ground high-spectrum imager |
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