CN210242985U - Airborne radiation correction device and system - Google Patents
Airborne radiation correction device and system Download PDFInfo
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- CN210242985U CN210242985U CN201920951578.3U CN201920951578U CN210242985U CN 210242985 U CN210242985 U CN 210242985U CN 201920951578 U CN201920951578 U CN 201920951578U CN 210242985 U CN210242985 U CN 210242985U
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Abstract
The utility model provides an airborne radiation correction device and system, the airborne radiation correction device is fixedly arranged at the top of an aircraft, and the airborne radiation correction device comprises a device controller, a reflection body, at least two incidence bodies and an imaging module arranged on each incidence body; the device controller is electrically connected with the imaging module; the incident bodies are connected with the reflecting bodies, and each incident body and each reflecting body form an included angle; the reflection body is provided with a diffuse reflection plate, and the diffuse reflection plate is used for reflecting an external light source to the imaging module; the device controller is used for sending an acquisition instruction to the imaging module; the imaging module is used for acquiring a reflected image generated by a reflected external light source when receiving an acquisition instruction and sending the reflected image to the device controller. The utility model discloses the observable wave band one-to-one of well machine year radiation correction device and machine year shooting equipment just has unified time space-time benchmark, and then can realize the radiation correction operation under same standard light source.
Description
Technical Field
The utility model relates to an image sensor's radiometric calibration field, in particular to airborne radiation correction device and system.
Background
The radiation correction of the remote sensing data is a basic link of the quantification of the remote sensing data, and the relation between the actual radiation brightness value of the corresponding pixel and the ground object of the sensor and the relative value of the sensor can be obtained only through the radiation correction, so that the calculation result is verified and corrected.
The most widely used radiation calibration method at present is to correct the radiation characteristic of the target to be measured by using the radiation characteristic of a known standard reflector, or to obtain the reflectivity of a ground object and the solar irradiance by using a ground object spectrometer, thereby achieving the purpose of radiation correction. However, because the flight height of the light and small unmanned aerial vehicle is low, the carried sensor has a small picture, if the radiometric calibration method is used, a large-area reflector plate needs to be laid, and the mode of laying the target plate on the ground is only suitable for the ground observation of the target in the open environment
In the existing consumption-level multispectral sensors, the Sequoia multispectral sensors and the Maia multispectral sensors are provided with solar radiation sensors which can be arranged on the top of an unmanned aerial vehicle body, and irradiance values corresponding to all wave bands of the multispectral sensors can be obtained through matched post-processing software, so that airborne real-time correction is realized.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an airborne radiation correction device and system in order to overcome the great defect of the method error that prior art carries out the correction to the environment image that unmanned aerial vehicle gathered.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
an airborne radiation correction device is fixedly arranged at the top of an aircraft and comprises a device controller, a reflection body, at least two incidence bodies and an imaging module arranged on each incidence body;
the device controller is electrically connected with the imaging module;
the incident bodies are connected with the reflecting bodies, and each incident body and the reflecting body form an included angle;
the reflection body is provided with a diffuse reflection plate, and the diffuse reflection plate is used for reflecting an external light source to the imaging module;
the device controller is used for sending an acquisition instruction to the imaging module;
the imaging module is used for acquiring a reflection image generated by a reflected external light source when receiving the acquisition instruction and sending the reflection image to the device controller.
Preferably, the airborne radiation correction apparatus further comprises a first connection device;
the first connecting device is respectively connected with the reflecting body and the incidence body;
the first connecting device is used for adjusting an included angle between the reflecting body and the incidence body.
Preferably, the reflection body is provided with a groove, and the diffuse reflection plate is removably embedded in the groove.
Preferably, the airborne radiation correction apparatus further comprises a second connection device, the second connection device comprising a detachable portion and a rotation locking portion;
the reflection body is arranged on the second connecting device;
the second connection device is connected with the aircraft through the detachable part;
the rotating locking part is used for adjusting an included angle between the reflecting body arranged on the second connecting device and the horizontal plane.
Preferably, the included angle ranges from 30 degrees to 45 degrees.
Preferably, the imaging module comprises an optical fiber, a filter, a micro lens and a photosensitive sensor;
the external light source reflected by the diffuse reflection plate is transmitted to the light sensing sensor through the optical fiber, the filter and the micro lens, and is imaged on the light sensing sensor.
An airborne radiation correction system comprising an airborne controller, an airborne camera and an airborne radiation correction apparatus as described above;
the airborne shooting equipment is fixedly arranged at the bottom of the aircraft;
the onboard controller is used for simultaneously sending the acquisition instruction to the device controller and the onboard shooting equipment;
the airborne shooting equipment is used for acquiring a shot image according to the acquisition instruction and sending the shot image to the airborne controller;
the device controller is used for acquiring the reflection image and sending the reflection image to the onboard controller.
Preferably, the onboard photographing device is a multispectral camera.
Preferably, the photosensitive sensors of the onboard shooting equipment and the onboard radiation correction device have the same specification.
The utility model discloses an actively advance the effect and lie in: the utility model discloses an airborne radiation correction device settles in the aircraft top, adopt the photosensor of the same specification with the airborne shooting equipment of installing in the aircraft bottom, the imaging device that can realize multispectral camera is in the operation exposure, under the environment that synchronous acquisition airborne narrow bandwidth multispectral camera located, the reflection image of corresponding wave band, and then acquire its radiance value data, and revise the radiation characteristic of the environment image that multispectral camera acquireed according to this radiance value data, airborne radiation correction device and airborne shooting equipment observable wave band one-to-one, and have unified time space-time basis, and then can realize the radiation correction operation under same standard light source.
Drawings
Fig. 1 is a first structural schematic diagram of an airborne radiation correction device according to embodiment 1 of the present invention.
Fig. 2 is a second schematic structural diagram of the airborne radiation correction apparatus according to embodiment 1 of the present invention.
Fig. 3 is a first structural schematic diagram of the aircraft according to embodiment 2 of the present invention.
Fig. 4 is a second structural schematic diagram of the aircraft according to embodiment 2 of the present invention.
Detailed Description
The present invention will be more clearly and completely described below with reference to the accompanying drawings.
Example 1
An airborne radiation correction device, as shown in fig. 1-2, the airborne radiation correction device 1 is fixedly arranged on the top of an aircraft (see fig. 3), the airborne radiation correction device 1 comprises a device controller (not shown in the figure), a reflection body 11, at least two incidence bodies 12 and an imaging module 13 arranged on each incidence body 12;
the device controller is electrically connected to the imaging module 13;
the incident bodies 12 are connected with the reflecting body 11, and each incident body 12 and the reflecting body 11 form an included angle; the value range of the included angle is 30-45 degrees, and the imaging module 13 can receive the reflected light source to the maximum extent;
the reflector 11 is provided with a diffuse reflection plate 14, the diffuse reflection plate 14 is used for reflecting an external light source to the imaging module 13, and the diffuse reflection plate 14 is a standard diffuse reflection plate 14 with certain lambertian characteristics and is used for reflecting a light source in the environment, namely sunlight. Lambertian characteristics refer to that the radiation brightness of a radiation surface source emitted to each direction is different and has directivity, and if the radiation brightness does not change along with the direction, the radiation body is called as a lambertian body. At present, the diffuse reflection plate 14 material coating uses common composite diffuse reflection coating materials including spectra, Infragold, Permaflect and the like, the main components of the coating include barium sulfate, polytetrafluoroethylene, water-based ethane and other synthetic chemical components, and different materials have different reflectivities;
the device controller is used for sending an acquisition instruction to the imaging module 13;
the imaging module 13 is configured to acquire a reflected image generated by a reflected external light source when receiving the acquisition instruction, and send the reflected image to the device controller.
In this embodiment, the onboard radiation correction device 1 further comprises a first connection device 15 and a second connection device 16;
the first connecting device 15 is respectively connected with the reflection body 11 and the incidence body 12;
the first connecting means 15 is used for adjusting the angle between the reflecting body 11 and the incident body 12.
The second connecting means 16 comprises a detachable portion 161 and a rotation locking portion 162;
the reflecting body 11 is arranged on the second connecting device 16;
the second connection means 16 are connected to the aircraft by the detachable portion 161;
the rotation locking portion 162 is used for adjusting an included angle between the reflection body 11 disposed on the second connecting device 16 and a horizontal plane.
Wherein, quick detach portion can realize the quick assembly disassembly of device and aircraft platform. After the mission flight path is determined, the installation surface of the device can be adjusted by rotating the locking mechanism according to the course angle of the aircraft in the flight path, the solar altitude angle before flight and the solar azimuth angle, so that the device is ensured to keep the optimal angle with the incident direction of the sun in the flight path, and the reflecting body 11 obtains higher solar radiation.
In addition, the diffuse reflection plates 14 made of different materials have different reflectivities, so that in order to facilitate a user to install the diffuse reflection plates 14 having different reflectivities according to different application requirements of different scenes, in this embodiment, a groove is formed in the reflection body 11, the diffuse reflection plates 14 are removably embedded in the groove, the groove may be a sliding groove, the reflection body 11 slides into and is fixed on the reflection body 11 through the sliding groove, the groove may also be a snap-in groove, and the reflection body 11 is embedded in the snap-in groove.
In this embodiment, the imaging module 13 includes an optical fiber, a filter, a microlens, and a photosensor;
the external light source reflected by the diffusely reflecting plate 14 is transmitted to the photosensor through the optical fiber, the filter, and the microlens, and is imaged on the photosensor.
Specifically, the imaging module 13 may adopt a dot matrix imaging array or an area matrix imaging array, which may be selected by a user. The lattice imaging device is light and convenient to integrate because the optical fiber bundle is small in size; the area array imaging device has the advantages that the composition and the imaging performance of the slave device are consistent with those of an airborne terminal, so that the influence caused by system difference can be reduced in data processing, and the reliability is high.
It should be noted that, in the dynamic flight process of the aircraft, because there is a situation that the ambient light changes greatly, in order to ensure that the devices of the airborne radiation correction device 1 are not shielded in different flight attitudes and flight paths, two incident bodies 12 are provided, and are located on both sides of the reflection body 11 and symmetrically distributed.
Example 2
3-4, the onboard radiation correction system includes an onboard controller (not shown), an onboard shooting device 2 and an onboard radiation correction device 1 as described in embodiment 1, where the onboard shooting device 2 is a multispectral camera, and the specifications of the photosensitive sensors of the onboard shooting device 2 and the onboard radiation correction device 1 are the same;
the airborne shooting equipment 2 is fixedly arranged at the bottom of the aircraft;
the onboard controller is used for simultaneously sending the acquisition instruction to the device controller and the onboard shooting equipment 2;
it should be noted that, the onboard radiation correction device 1 and the onboard shooting device 2 use GPS time as a time reference and perform synchronous acquisition, and the onboard shooting device 2 acquires an image at the camera station and the onboard radiation correction device 1 completes one acquisition. When the calibration is performed, in the preprocessing stage, firstly, the image data acquired by the two devices needs to be aligned according to the time stamp obtained by the GPS time service.
The onboard shooting equipment 2 is used for acquiring a shot image according to the acquisition instruction and sending the shot image to the onboard controller;
the device controller is used for acquiring the reflection image and sending the reflection image to the onboard controller.
It should be noted that, during the calibration, the onboard radiation calibration apparatus 1 is installed, and parameter setting is performed to ensure that the performance parameters (size, pixel count, signal-to-noise ratio, and the like) of the imaging module 13 and the photosensitive elements of the imaging module 13 are consistent with the imaging parameters (photosensitive speed, exposure compensation, shutter, white balance, and the like).
The airborne controller synchronously sends a collection instruction to the airborne radiation correction device 1 and the airborne shooting equipment 2, when the device controller of the airborne radiation correction device 1 receives the collection instruction, the imaging module 13 is controlled to obtain a reflection image, the airborne shooting equipment 2 synchronously collects a shooting image, and then the shooting image obtained synchronously is subjected to radiation correction according to the obtained reflection image.
In this embodiment, the airborne radiation correction device is disposed at the top of the aircraft, and the same specification of the photosensitive sensor is used for the airborne shooting equipment installed at the bottom of the aircraft, so that the imaging device of the multispectral camera can synchronously acquire reflected images of corresponding wave bands in the environment where the airborne narrow-bandwidth multispectral camera is located while performing operation exposure, further obtain radiance value data of the multispectral camera, and correct the radiation characteristics of the environment images obtained by the multispectral camera according to the radiance value data, the airborne radiation correction device and the observable wave bands of the airborne shooting equipment correspond to each other one by one, and have a uniform time space-time reference, thereby performing radiation correction operation under the same standard light source.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. An airborne radiation correction device, characterized in that the airborne radiation correction device is fixedly arranged at the top of an aircraft, the airborne radiation correction device comprises a device controller, a reflection body, at least two incidence bodies and an imaging module arranged on each incidence body;
the device controller is electrically connected with the imaging module;
the incident bodies are connected with the reflecting bodies, and each incident body and the reflecting body form an included angle;
the reflection body is provided with a diffuse reflection plate, and the diffuse reflection plate is used for reflecting an external light source to the imaging module;
the device controller is used for sending an acquisition instruction to the imaging module;
the imaging module is used for acquiring a reflection image generated by a reflected external light source when receiving the acquisition instruction and sending the reflection image to the device controller.
2. The airborne radiation correction apparatus of claim 1, further comprising a first connection device;
the first connecting device is respectively connected with the reflecting body and the incidence body;
the first connecting device is used for adjusting an included angle between the reflecting body and the incidence body.
3. The apparatus of claim 1, wherein the reflector body defines a recess, and the diffuse reflector is removably received in the recess.
4. The radiation conection apparatus according to claim 1, wherein said onboard radiation conection apparatus further comprises a second coupling apparatus, said second coupling apparatus comprising a detachable portion and a rotational locking portion;
the reflection body is arranged on the second connecting device;
the second connection device is connected with the aircraft through the detachable part;
the rotating locking part is used for adjusting an included angle between the reflecting body arranged on the second connecting device and the horizontal plane.
5. The airborne radiation correction apparatus of claim 1, wherein the included angle ranges from 30 ° to 45 °.
6. The radiation correction apparatus of claim 1, wherein the imaging module comprises an optical fiber, a filter, a microlens, and a photosensor;
the external light source reflected by the diffuse reflection plate is transmitted to the light sensing sensor through the optical fiber, the filter and the micro lens, and is imaged on the light sensing sensor.
7. An airborne radiation correction system, characterized in that the airborne radiation correction system comprises an airborne controller, an airborne camera and an airborne radiation correction apparatus according to any of claims 1-6;
the airborne shooting equipment is fixedly arranged at the bottom of the aircraft;
the onboard controller is used for simultaneously sending the acquisition instruction to the device controller and the onboard shooting equipment;
the airborne shooting equipment is used for acquiring a shot image according to the acquisition instruction and sending the shot image to the airborne controller;
the device controller is used for acquiring the reflection image and sending the reflection image to the onboard controller.
8. The system of claim 7, wherein the onboard camera is a multi-spectral camera.
9. The system of claim 7, wherein the photosensitive sensors of the onboard camera and the onboard radiation correction device are of the same size.
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| CN201920951578.3U CN210242985U (en) | 2019-06-24 | 2019-06-24 | Airborne radiation correction device and system |
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| CN201920951578.3U CN210242985U (en) | 2019-06-24 | 2019-06-24 | Airborne radiation correction device and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108909A (en) * | 2021-04-14 | 2021-07-13 | 长光禹辰信息技术与装备(青岛)有限公司 | Spectral imaging device and correction method thereof |
| CN114544006A (en) * | 2022-01-07 | 2022-05-27 | 上海同繁勘测工程科技有限公司 | Low-altitude remote sensing image correction system and method based on ambient illumination condition |
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2019
- 2019-06-24 CN CN201920951578.3U patent/CN210242985U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108909A (en) * | 2021-04-14 | 2021-07-13 | 长光禹辰信息技术与装备(青岛)有限公司 | Spectral imaging device and correction method thereof |
| CN114544006A (en) * | 2022-01-07 | 2022-05-27 | 上海同繁勘测工程科技有限公司 | Low-altitude remote sensing image correction system and method based on ambient illumination condition |
| CN114544006B (en) * | 2022-01-07 | 2023-12-05 | 上海同繁勘测工程科技有限公司 | Low-altitude remote sensing image correction system and method based on ambient illumination condition |
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