CN114578377A - Low-cost infrared and visible light common-aperture imaging system - Google Patents
Low-cost infrared and visible light common-aperture imaging system Download PDFInfo
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- CN114578377A CN114578377A CN202210333075.6A CN202210333075A CN114578377A CN 114578377 A CN114578377 A CN 114578377A CN 202210333075 A CN202210333075 A CN 202210333075A CN 114578377 A CN114578377 A CN 114578377A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 48
- 238000003331 infrared imaging Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000009466 transformation Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 238000010224 classification analysis Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 230000004927 fusion Effects 0.000 description 4
- 238000001931 thermography Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
- G01S17/90—Lidar systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
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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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
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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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
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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
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
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- Radar, Positioning & Navigation (AREA)
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Abstract
The invention discloses a low-cost infrared and visible light common-aperture imaging system, which comprises a common-aperture axial collimating lens module, a light reflecting and transmitting module, an infrared imaging module and a visible light and/or ultraviolet imaging module; wherein, reflection of light printing opacity module has reflection of light and printing opacity two kinds of modes: in the light transmission mode, the coaxial aperture diameter collimating lens module, the light reflection and transmission module and the infrared imaging module form a light path; in a light reflecting mode, the coaxial aperture collimating lens module, the light reflecting and transmitting module and the visible light and/or ultraviolet imaging module form another light path. The light reflecting and transmitting module is fan-shaped and comprises a rotary type reflector and a reflector driving motor, wherein the rotary type reflector is provided with a plurality of reflectors, and the reflector driving motor is used for driving the reflector to enter a light reflecting or transmitting mode. The invention has low cost, reliable structure and easy maintenance, can realize fast alternate imaging, and has important application value in real-time monitoring of equipment defects in the field of high-voltage power transmission and transformation, identification and classification analysis of surrounding environment objects and the like.
Description
Technical Field
The invention belongs to the technical field of optics, and particularly relates to a low-cost infrared and visible light common-aperture imaging system.
Background
The abnormal conditions of the connecting points and the insulating parts of the power transmission and transformation equipment can cause local temperature rise (infrared characteristic) or electric arcs (ultraviolet characteristic), and the power transmission and transformation equipment can also have local surface damage or foreign matters (visible light identification) in the operation process, so that the extremely high requirements on the detection of the power grid equipment are provided for ensuring the safe and reliable operation of a power transmission system.
In the past decades, the detection of the abnormality of the power grid equipment is mainly based on the extraction and identification of single defect characteristics. With the development of optical image fusion technology, the infrared, ultraviolet and visible light fusion is gradually applied to the omnibearing detection of defects, so that richer optical detection information is provided, and higher detection recognition rate and accuracy are realized. However, the existing infrared thermometry, ultraviolet corona detection and visible light imaging are implemented by three-light imaging through at least 2 off-axis apertures, mainly because the infrared light (wavelength 8-12 microns) of thermal imaging is too far from the wavelength of the visible light band, and no commercially available light splitting sheet can separate the infrared light and the visible light at present, so that the infrared light and the visible light are difficult to acquire and image in a conjugate manner through the same aperture. Off-axis aperture imaging not only increases hardware cost, but also increases workload and errors of data fusion.
Disclosure of Invention
In order to solve the above problems, the present invention provides a low-cost infrared and visible light common-aperture imaging system.
A low-cost infrared and visible light common-aperture imaging system comprises a common-axis aperture collimating lens module, a light reflecting and transmitting module, an infrared imaging module and a visible light and/or ultraviolet imaging module;
wherein, reflection of light printing opacity module has reflection of light and printing opacity two kinds of modes:
in the light-transmitting mode,
the coaxial aperture collimating lens module, the light reflecting and transmitting module and the infrared imaging module form a light path;
in the light-reflecting mode,
the coaxial aperture collimating lens module, the light reflecting and transmitting module and the visible light and/or ultraviolet imaging module form another light path.
The light reflecting and transmitting module is provided with a light reflector and a light reflector switch to select a light reflecting or transmitting mode.
The light reflecting and transmitting module is fan-shaped and comprises a rotary type reflector and a reflector driving motor, wherein the rotary type reflector is provided with a plurality of reflectors, and the reflector driving motor is used for driving the reflector to enter a light reflecting or transmitting mode.
The visible light and/or ultraviolet imaging module comprises a visible light camera.
The visible light and/or ultraviolet imaging module comprises a visible light camera and an ultraviolet camera which are in conjugate imaging through a light splitting lens.
The ultraviolet camera adopts an ultraviolet enhancement type CCD, and ultraviolet light is converted into visible light through fluorescence.
According to the low-cost infrared and visible light common-aperture imaging system, in a light reflecting mode, the common-axis aperture collimating lens module, the light reflecting and transmitting module, the visible light reflector and the visible light and/or ultraviolet imaging module form another light path.
An application of a low-cost infrared and visible light common-aperture imaging system is used for fault detection of power grid equipment.
The invention has the beneficial effects that:
the device has the advantages of low cost, reliable structure and easy maintenance, can realize fast alternate imaging after the rotary reflector and the reflector driving motor are adopted, and has important application value in real-time monitoring of equipment defects in the high-voltage power transmission and transformation field, identification and classification analysis of surrounding environment objects and the like.
Drawings
FIG. 1 is a schematic diagram of an example of a low cost infrared and visible co-aperture imaging system;
in the figure, a visible light reflector 1, an infrared camera 2, a visible light camera 3, a coaxial aperture collimating lens module 4, a rotary reflector 5 and a reflector driving motor 6.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
As shown in fig. 1, a low-cost infrared and visible light common-aperture imaging system includes a coaxial aperture collimating lens module 4, a light reflecting and transmitting module, an infrared imaging module (shown as an infrared camera 2 in fig. 1), a visible light and/or ultraviolet imaging module; in addition, the visible light reflector 1 in fig. 1 is optional.
Wherein, reflection of light printing opacity module has reflection of light and printing opacity two kinds of modes:
in the light-transmitting mode,
the coaxial aperture collimating lens module 4, the light reflecting and transmitting module and the infrared imaging module form a light path;
in the light-reflecting mode,
the coaxial aperture collimating lens module 4, the light reflecting and transmitting module, and the visible light and/or ultraviolet imaging module form another light path.
The light reflecting and transmitting module is provided with a light reflector and a light reflector switch to select a light reflecting or transmitting mode.
As shown in fig. 1, the light reflecting and transmitting module is in a fan shape, and includes a rotary mirror 5 and a mirror driving motor 6, wherein the rotary mirror 5 is provided with a plurality of mirrors, and is driven by the mirror driving motor 6 to enter a light reflecting or transmitting mode. When infrared light and visible light are emitted into the imaging system from the same aperture, the reflector driving motor drives the rotary reflector to rotate, gaps between the reflector and the reflector form periodic rotation, when the rotary reflector rotates to the position of the lens, incident light is reflected to the visible light camera, and when the reflector rotates to the position of the gaps, the infrared camera receives infrared light.
The visible and/or ultraviolet imaging module comprises a visible light camera 3.
The visible light and/or ultraviolet imaging module comprises a visible light camera and an ultraviolet camera which are in conjugate imaging through a light splitting lens.
The ultraviolet camera can adopt an ultraviolet enhancement type CCD, and ultraviolet light is converted into visible light through fluorescence.
As shown in fig. 1, in the low-cost infrared and visible light common-aperture imaging system, in a light reflection mode, the common-aperture collimating lens module 4, the light reflection and transmission module, the visible light reflector 1, and the visible light and/or ultraviolet imaging module form another light path. When the visible light reflector 1 is arranged, the infrared camera 2 and the visible light camera 3 can be in parallel positions. When the visible light reflector 1 is not provided, the infrared camera 2 and the visible light camera 3 can be in vertical positions.
An application of a low-cost infrared and visible light common-aperture imaging system is used for fault detection of power grid equipment.
One of the application scenarios is: the temperature at these specific target points needs to be monitored because the temperature increases locally due to the abnormal conditions of the transmission and transformation equipment connection points and the insulating components. Thermal infrared cameras can measure temperature but have poor spatial resolution and are difficult to identify such specific target points, and especially the identification of such specific target points may be interfered by high-temperature objects in the surrounding environment. It is therefore necessary to identify such a specific target point with a visible camera and then read out the temperature of the point at the corresponding position point with a thermal infrared camera. However, the thermal infrared camera and the visible light camera are generally combined into an off-axis system on the market at present, because the infrared light (wavelength of 8-12 microns) of thermal imaging is far from the wavelength of the visible light band, and no commercially available light splitting plate can separate the infrared light and the visible light band through the same aperture at present. Off-axis aperture imaging requires calibration of the pose transformation (rotation and translation) between them so that the data of both can be aligned in spatial position. The existing calibration method is mostly carried out based on a checkerboard calibration plate, and the calibration precision is determined by the calibration plate precision and the detection matching precision of an infrared camera and a visible light camera relative to checkerboard angular points. Due to the fact that images shot between the visible light camera and the thermal infrared camera have great difference, the error of the calibration algorithm of the off-axis double-light system is large. This may cause a spatial error between the point at which the thermal infrared camera reads the temperature and the specific target point identified by the visible light camera, and the temperature read may be the temperature of a point in the surrounding environment. The infrared and visible light common-aperture imaging system of the invention has no error, because the point of the common-aperture thermal infrared camera reading temperature and the specific target point identified by the visible light camera are pixel points which are in one-to-one correspondence on physical hardware, and pose transformation (rotation and translation) fusion is not needed. In addition, the infrared light change of the thermal imaging of the power grid equipment is not fast, so that the infrared and visible light can be imaged by rotating the common aperture quickly.
The embodiments in the above description can be further combined or replaced, and the embodiments are only described as preferred examples of the present invention, and do not limit the concept and scope of the present invention, and various changes and modifications made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention belong to the protection scope of the present invention. The scope of the invention is given by the appended claims and any equivalents thereof.
Claims (8)
1. A low-cost infrared and visible light common-aperture imaging system is characterized in that: the coaxial aperture collimating lens module comprises a coaxial aperture collimating lens module, a light reflecting and transmitting module, an infrared imaging module and a visible light and/or ultraviolet imaging module;
wherein, reflection of light printing opacity module has reflection of light and printing opacity two kinds of modes:
in the light-transmitting mode,
the coaxial aperture collimating lens module, the light reflecting and transmitting module and the infrared imaging module form a light path;
in the light-reflecting mode,
the coaxial aperture collimating lens module, the light reflecting and transmitting module and the visible light and/or ultraviolet imaging module form another light path.
2. A low cost infrared and visible light common aperture imaging system according to claim 1, wherein: the light reflecting and transmitting module is provided with a light reflector and a light reflector switch to select a light reflecting or transmitting mode.
3. A low cost infrared and visible light common aperture imaging system according to claim 1, wherein: the light reflecting and transmitting module is fan-shaped and comprises a rotary type reflector and a reflector driving motor, wherein the rotary type reflector is provided with a plurality of reflectors, and the reflector driving motor is used for driving the reflector to enter a light reflecting or transmitting mode.
4. A low cost infrared and visible light common aperture imaging system according to claim 1, wherein: the visible light and/or ultraviolet imaging module comprises a visible light camera.
5. A low cost infrared and visible light common aperture imaging system according to claim 1, wherein: the visible light and/or ultraviolet imaging module comprises a visible light camera and an ultraviolet camera which are in conjugate imaging through a light splitting lens.
6. The low cost infrared and visible light common aperture imaging system according to claim 5, wherein: the ultraviolet camera adopts an ultraviolet enhancement type CCD, and ultraviolet light is converted into visible light through fluorescence.
7. A low cost infrared and visible light common aperture imaging system according to claim 1, wherein:
in a light reflecting mode, the coaxial aperture collimating lens module, the light reflecting and transmitting module, the visible light reflector, the visible light and/or ultraviolet imaging module form another light path.
8. The use of a low cost infrared and visible light common aperture imaging system according to claim 1, wherein:
the method is used for detecting the fault of the power grid equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333075.6A CN114578377A (en) | 2022-03-31 | 2022-03-31 | Low-cost infrared and visible light common-aperture imaging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210333075.6A CN114578377A (en) | 2022-03-31 | 2022-03-31 | Low-cost infrared and visible light common-aperture imaging system |
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| CN114578377A true CN114578377A (en) | 2022-06-03 |
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| CN202210333075.6A Pending CN114578377A (en) | 2022-03-31 | 2022-03-31 | Low-cost infrared and visible light common-aperture imaging system |
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| CN (1) | CN114578377A (en) |
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- 2022-03-31 CN CN202210333075.6A patent/CN114578377A/en active Pending
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