CN113660403A - Satellite-borne ultra-miniature monitoring camera - Google Patents
Satellite-borne ultra-miniature monitoring camera Download PDFInfo
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- CN113660403A CN113660403A CN202110969442.7A CN202110969442A CN113660403A CN 113660403 A CN113660403 A CN 113660403A CN 202110969442 A CN202110969442 A CN 202110969442A CN 113660403 A CN113660403 A CN 113660403A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a satellite-borne ultra-miniature monitoring camera which comprises a camera shell, wherein a camera structural part is installed in the camera shell, a specially-made rigid-flexible integrated circuit board is fixedly installed in the camera structural part through a second screw, a focal plane module, a signal processing module and an interface circuit module are installed on the specially-made rigid-flexible integrated circuit board, an automatic focusing voice coil motor lens is installed at one end of the specially-made rigid-flexible integrated circuit board, and an anti-irradiation glass assembly covers the automatic focusing voice coil motor lens. The invention has the advantages that: simple structure, small volume, low power consumption, low cost, short production period and certain radiation resistance.
Description
Technical Field
The invention relates to the technical field of monitoring cameras, in particular to a satellite-borne ultra-miniature monitoring camera.
Background
In recent years, with the development of the commercial aerospace industry, the launching of subminiature satellites such as micro-nano satellites and pico-satellites, such as bamboo shoots in the spring after rain, and small-volume satellites, put new technical requirements on satellite-borne monitoring cameras, which are important loads for ensuring the launching task and the safety of in-orbit operation of the satellites.
For technical reasons, the existing satellite-borne monitoring cameras mostly adopt a fixed-focus lens and a large-area array CMOS image sensor, the monitoring cameras are large in size, high in power consumption and high in cost, and are not suitable for being used on a micro-nano satellite and a pico-satellite, and a ground-used micro camera is poor in environment, mechanics and anti-irradiation performance and is not suitable for being used on a satellite-borne camera.
Disclosure of Invention
In order to solve the above problems, the present invention provides a satellite-borne ultra-miniature surveillance camera, which has a simple structure, a small volume, low power consumption, a low cost, a short production period, and a certain radiation resistance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a satellite-borne ultra-miniature monitoring camera comprises anti-radiation glass, an automatic focusing voice coil motor lens, a focal plane module, a signal processing module, an interface circuit module, a special rigid-flexible integrated circuit board and a camera structural member. The special rigid-flexible integrated circuit board is composed of a first rigid board, a second rigid board, a third rigid board, a first flexible connection and a second flexible connection. The focal plane module is designed on the first rigid plate, the signal processing module is designed on the second rigid plate, and the interface circuit module is designed on the third rigid plate. The flexible connection I is used for connecting the first rigid plate and the second rigid plate and transmitting data output by the image sensor to the signal processing module on the second rigid plate. The flexible connection II is used for connecting the rigid board II and the rigid board III, image data processed by the signal processing module is transmitted to the interface circuit module, and the external connector on the rigid board III is used for outputting the image data of the camera and receiving an external control instruction. The automatic focusing voice coil motor lens is adhered to the first rigid plate through silica gel and is compressed and fixed through a structural part, and the anti-irradiation glass is arranged between the anti-irradiation glass groove and the anti-irradiation glass locking surface and used for protecting the image sensor from being damaged by high-energy particles in space. A specially-made rigid-flexible integrated circuit board is mounted on the camera component and protected by the camera housing.
As an improvement, the anti-radiation glass is thickened and coated optical glass, transmits visible light, blocks space high-energy particles, is arranged between an anti-radiation glass groove and an anti-radiation glass locking surface, and effectively blocks the space high-energy particles from being shot onto an image sensor focal plane through a lens to damage the sensor.
As an improvement, the automatic focusing voice coil motor lens is composed of a voice coil motor, an optical lens and a supporting structure, the optical lens is fixed on the voice coil camera, the distance from the lens to an image sensor can be adjusted within a small range through the voice coil camera, and the function of focusing is achieved. A base behind the automatic focusing voice coil motor lens supporting structure is attached to the first rigid plate through silicon glue, and the front of the automatic focusing voice coil motor lens supporting structure is tightly pressed on the surface of the anti-radiation glass groove, so that reliable installation is guaranteed.
As an improvement, the focal plane module consists of an image sensor and a power supply circuit, the image sensor realizes the conversion from visible light to electric signals and realizes the output of image data stream, and the power supply module consists of two LDO voltage stabilization chips LDO _ A and LDO _ B which respectively supply power for the core and the structure of the image sensor.
The signal processing module is composed of an FPGA chip, two SRAM chips, a PROM chip and a power supply, the FPGA realizes driving of an image sensor, design of SRAM read-write time sequence, image data packing, camera instruction analysis and the like, the SRAM is connected with the FPGA to realize ping-pong caching of image data, and the power supply module is composed of a switch type DCDC and an LDO and respectively supplies power to an inner core, an I/Obank, the SRAM and the like of the FPGA.
As an improvement, the interface circuit module comprises an instruction interface chip, a data interface chip and an external connector, wherein the instruction interface module is in an input mode and adopts a 422 asynchronous serial port protocol. The data interface module is in an output mode and adopts a three-wire LVDS protocol. The external connector is used for connecting a camera cable, receiving the instruction signal and outputting the image frame signal.
As an improvement, the camera structural part consists of a front panel, a rear panel, a middle frame, an anti-radiation glass groove and an anti-radiation glass locking surface, wherein a first rigid plate is fixed on the front panel, and a third rigid plate is fixed on the rear panel. Three rigid plates are fixed by four perforated screws, so that the mechanical property is ensured.
Compared with the prior art, the invention has the advantages that: the invention adopts the voice coil motor camera, realizes the automatic focusing function of the satellite-borne monitoring camera on the premise of reducing the system volume, and realizes the automatic focusing function of the satellite-borne ultra-miniature monitoring camera on the premise of not increasing the volume of the camera.
The anti-radiation glass is additionally arranged at the front end of the lens, and the anti-radiation glass can transmit visible light and simultaneously block space high-energy particles, so that the focal plane of the image sensor is protected from being hit by the particles.
The camera adopts a specially-made rigid-flexible board structure, the rigid-flexible board adopts a multi-layer circuit board structure, the rigid board is used for arranging components, the flexible board is used for connection, and an inter-board connector is not used in the camera, so that the effective area of the rigid board is used to the maximum extent, and the size of the whole camera is reduced.
The signal processing module in the invention adopts the FPGA chip, thereby reducing the power consumption of the system and improving the reliability of the system.
The data interface and the instruction interface in the invention respectively adopt a three-wire LVDS interface and a 422 asynchronous interface, thereby reducing the power consumption of the system and simultaneously improving the data rate of the data transmission of the camera.
Drawings
FIG. 1 is a schematic structural diagram of a satellite-borne ultra-miniature surveillance camera according to the present invention.
FIG. 2 is a schematic view of the structure of an anti-radiation glass assembly of the satellite-borne ultra-miniature surveillance camera according to the present invention.
FIG. 3 is a schematic diagram of a rigid-flexible integrated circuit board for a satellite-borne surveillance camera according to the present invention.
FIG. 4 is a schematic diagram of a cover plate structure of a satellite-borne ultra-miniature surveillance camera according to the present invention.
As shown in the figure: 1. the anti-radiation glass locking surface; 2. anti-radiation glass; 3. an anti-radiation glass tank; 4. an auto-focus voice coil motor lens; 5. a first rigid plate; 6. flexibly connecting a first connector; 7. a second rigid plate; 8. a second flexible connection; 9. a rigid plate III; 10. a camera structure; 11. a first screw; 12. a second screw; 13. a cover plate; 14. windowing the connector; 15. and (4) overlapping the holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to the attached drawing 1, a satellite-borne ultra-miniature surveillance camera comprises an anti-radiation glass assembly, an automatic focusing voice coil motor lens 4, a focal plane module, a signal processing module, an interface circuit module, a special rigid-flexible integrated circuit board and a camera structural member 10.
The special rigid-flexible integrated circuit board consists of 6 parts: rigid plate 1, rigid plate 2, rigid plate 3, flexible connection 1 and flexible connection 2. The focal plane circuit board is designed on the rigid board 1, the signal processing module is designed on the rigid board 2, and the interface circuit module is designed on the rigid board 3. The flexible connection 1 is used for connecting the rigid board 1 and the rigid board 2 and transmitting data output by the image sensor to a signal processing circuit on the rigid board 2. The flexible connection 2 is used for connecting the rigid board 2 and the rigid board 3, transmitting the image data processed by the signal processing module to the interface circuit module, and the external connector on the rigid board 3 is used for outputting the image data of the camera and receiving an external control instruction. The lens of the voice coil motor is adhered to the rigid plate 1 by silica gel and is compressed and fixed by a structural part, and the anti-radiation glass is arranged between the anti-radiation glass groove and the anti-radiation glass locking surface and used for protecting the image sensor from being damaged by high-energy particles in space. A specially-made rigid-flexible integrated circuit board is mounted on the camera component and is comprised by the camera housing.
Referring to fig. 3, a flexible connection one 6 is located between the first rigid board 5 and the second rigid board 7, and is used for transmitting the output signal of the image sensor and transmitting the power signal from the second rigid board 7 to the first rigid board 5; the flexible connection II 8 is positioned between the rigid plate II 7 and the rigid plate III 9 and is used for transmitting the packed data signals of the FPGA to a data interface chip on a data interface circuit and transmitting the instruction signals input by the instruction interface chip to the FPGA for instruction analysis. Because the inter-board connector is large in size, the design method of replacing the inter-board connector by flexible connection maximizes the layout and wiring of devices on the rigid board, greatly saves space and reduces size.
After the installation, the first rigid plate 5, the second rigid plate 7 and the third rigid plate 9 are in parallel positions, the distance between the plates is 7mm, the first rigid plate 5 is fixed on the front panel, the third rigid plate 9 is fixed on the rear panel, and the first rigid plate 5 and the second rigid plate 7 are fixed through a phi 3 stud.
Referring to fig. 2, wherein 1 is an anti-radiation glass locking surface, 2 is anti-radiation glass, 10 is a camera structural member, 5 is a first rigid plate, 4 is an auto-focus voice coil motor lens, 11 is a first screw of the anti-radiation glass locking surface, 12 is a second screw for fixing a circuit board, and 3 is an anti-radiation glass groove. The anti-radiation glass 2 is arranged between the anti-radiation glass locking surface 1 and the anti-radiation glass groove 3 and is fixed by four fixing screws. The automatic focusing voice coil lens 4 is adhered to the first rigid plate 5 and is in compression joint with the back of the anti-radiation glass groove 3 and is fixed by adopting a fixing screw.
Referring to fig. 4, there is shown a cover plate 13 covering the rear end of the camera housing, wherein 15 is a lap hole, 14 is a connector window through which the external connector is connected to the cable.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The satellite-borne ultra-miniature monitoring camera is characterized by comprising a camera shell, wherein a camera structural part (10) is installed in the camera shell, a specially-made rigid-flexible integrated circuit board is fixedly installed in the camera structural part (10) through a second screw (12), a focal plane module, a signal processing module and an interface circuit module are installed on the specially-made rigid-flexible integrated circuit board, an automatic focusing voice coil motor lens (4) is installed at one end of the specially-made rigid-flexible integrated circuit board, and an anti-radiation glass assembly covers the automatic focusing voice coil motor lens (4);
the special rigid-flexible integrated circuit board comprises a first rigid board (5), a second rigid board (7) and a third rigid board (9) which are arranged in a camera structural member (10), a first flexible connection (6) is connected between the first rigid board (5) and the second rigid board (7), a second flexible connection (8) is connected between the second rigid board (7) and the third rigid board (9), a focal plane module is electrically connected onto the first rigid board (5), a signal processing module is electrically connected onto the second rigid board (7), an interface circuit module is electrically connected onto the third rigid board (9), and an automatic focusing voice coil motor lens (4) is arranged on the side face of the first rigid board (5).
2. The satellite-borne ultra-miniature surveillance camera according to claim 1, characterized in that: the anti-irradiation glass assembly comprises a cover, an anti-irradiation glass locking face (1) which is arranged on the automatic focusing voice coil motor lens (4) and used for pressing the automatic focusing voice coil motor lens (4) is fixed on a camera structural member (10) through a screw (11), an anti-irradiation glass groove (3) is formed between the automatic focusing voice coil motor lens (4) and the anti-irradiation glass locking face (1), and anti-irradiation glass (2) is installed in the anti-irradiation glass groove (3).
3. The satellite-borne ultra-miniature surveillance camera according to claim 2, characterized in that: the anti-radiation glass (2) is thickened coated optical glass.
4. The satellite-borne ultra-miniature surveillance camera according to claim 2, characterized in that: automatic focus voice coil motor camera lens (4) comprise voice coil motor, optical lens and bearing structure, optical lens is fixed in on the voice coil camera, bearing structure adopts silica gel to paste on rigid plate (5), bearing structure preceding compress tightly in on anti irradiation glass locking surface (1).
5. The satellite-borne ultra-miniature surveillance camera according to claim 1, characterized in that: the focal plane module is composed of an image sensor and a power supply circuit, the image sensor realizes conversion from visible light to electric signals and output of image data flow, and the power supply circuit is composed of two LDO voltage stabilizing chips LDO _ A and LDO _ B and respectively supplies power to an inner core and a structure of the image sensor.
6. The satellite-borne ultra-miniature surveillance camera according to claim 1, characterized in that: the signal processing module comprises an FPGA chip, two SRAM chips, a PROM chip and a power supply, wherein the SRAM chip is electrically connected with the FPGA chip, and the power supply comprises a switch type DCDC and an LDO.
7. The satellite-borne ultra-miniature surveillance camera according to claim 1, characterized in that: the interface circuit module comprises an instruction interface chip, a data interface chip and an external connector.
8. The satellite-borne ultra-miniature surveillance camera according to claim 7, characterized in that: the instruction interface chip is in an input mode, a 422 asynchronous serial port protocol is adopted, the data interface chip is in an output mode, a three-wire LVDS protocol is adopted, and the external connector is used for connecting a camera cable, receiving an instruction signal and outputting an image frame signal.
9. The satellite-borne ultra-miniature surveillance camera according to claim 1, characterized in that: the camera shell tail end is fixed with a cover plate (13) through bolts, and a connector window (14) and a lap joint hole (15) are formed in the cover plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110969442.7A CN113660403B (en) | 2021-08-23 | 2021-08-23 | Satellite-borne ultra-miniature monitoring camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110969442.7A CN113660403B (en) | 2021-08-23 | 2021-08-23 | Satellite-borne ultra-miniature monitoring camera |
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| CN113660403A true CN113660403A (en) | 2021-11-16 |
| CN113660403B CN113660403B (en) | 2023-06-02 |
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| CN113660403B (en) | 2023-06-02 |
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