CN113660403B - Satellite-borne ultra-miniature monitoring camera - Google Patents
Satellite-borne ultra-miniature monitoring camera Download PDFInfo
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- CN113660403B CN113660403B CN202110969442.7A CN202110969442A CN113660403B CN 113660403 B CN113660403 B CN 113660403B CN 202110969442 A CN202110969442 A CN 202110969442A CN 113660403 B CN113660403 B CN 113660403B
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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
Abstract
The invention discloses a satellite-borne ultra-miniature monitoring camera, which comprises a camera shell, wherein a camera structural part is arranged in the camera shell, a special rigid-flexible integrated circuit board is fixedly arranged in the camera structural part through a second screw, a focal plane module, a signal processing module and an interface circuit module are arranged on the special rigid-flexible integrated circuit board, an automatic focusing voice coil motor lens is arranged at the head end of one end of the special rigid-flexible integrated circuit board, and an irradiation-resistant glass component is covered on 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 irradiation 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 emission of ultra-small satellites such as micro-nano satellites and pico-satellites, such as spring bamboo shoots after rain, and the small-volume satellites put new technical requirements on satellite-borne monitoring cameras, which are important loads for guaranteeing the safety of emission tasks and satellite in-orbit operation.
For technical reasons, the existing satellite-borne monitoring cameras mostly adopt fixed-focus lenses and large-area array CMOS image sensors, and are large in size, high in power consumption and high in cost, not suitable for being used on micro-nano satellites and pico-satellites, but poor in environment, mechanics and anti-radiation performance of ground-based miniature cameras, and not suitable for being used on the satellite-borne cameras.
Disclosure of Invention
The invention aims to solve the problems, and provides a satellite-borne ultra-miniature monitoring camera which has the advantages of simple structure, small volume, low power consumption, low cost, short production period and certain anti-irradiation function.
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-irradiation 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 first flexible connection is used for connecting the first rigid plate and the second rigid plate, and data output by the image sensor are transmitted to the signal processing module on the second rigid plate. The flexible connection II is used for connecting the rigid plate II and the rigid plate III, transmitting the image data processed by the signal processing module to the interface circuit module, and the external connector on the rigid plate III is used for outputting the image data of the camera and receiving external control instructions. The automatic focusing voice coil motor lens is adhered to the first rigid plate by adopting silica gel, and is fixed by adopting a structural member in a pressing way, and the anti-irradiation glass is arranged between the anti-irradiation glass groove and the locking surface of the anti-irradiation glass and is used for protecting the image sensor from being damaged by high-energy particles in the receiving space. The special rigid-flexible integrated circuit board is arranged on the camera component and is protected by the camera shell.
As improvement, the anti-irradiation glass is thickened film-coated optical glass, transmits visible light, blocks space high-energy particles, is arranged between an anti-irradiation glass groove and an anti-irradiation glass locking surface, and effectively blocks the space high-energy particles from being hit on the focal plane of the image sensor through a lens to damage the sensor.
As an improvement, the automatic focusing voice coil motor lens consists of a voice coil motor, an optical lens and a supporting structure, wherein the optical lens is fixed on the voice coil camera, and the distance from the lens to the image sensor can be adjusted in a small range through the voice coil camera, so that the focusing function is realized. The base behind the automatic focusing voice coil motor lens supporting structure is stuck on the first rigid plate by adopting silica gel, and the front of the automatic focusing voice coil motor lens supporting structure is tightly pressed on the surface of the irradiation-resistant glass groove, so that reliable installation is ensured.
As an improvement, the focal plane module consists of an image sensor and a power supply circuit, the image sensor is used for converting visible light into electric signals and outputting image data streams, and the power supply module consists of two LDO voltage stabilizing chips LDO_A and LDO_B which are used for respectively supplying power to the inner core and the structure of the image sensor.
The signal processing module is improved and consists of an FPGA chip, two SRAM chips, a PROM chip and a power supply, wherein the FPGA realizes the driving of an image sensor, the design of the read-write time sequence of the SRAM, the packaging of image data, the analysis of camera instructions and the like, the SRAM is connected with the FPGA to realize the ping-pong cache of the image data, and the power supply module consists of a switch type DCDC and an LDO and respectively supplies power for the inner core, the 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 adopts 422 asynchronous serial port protocol for an input mode. The data interface module is in output mode and adopts three-wire LVDS protocol. The external connector is used for connecting a camera cable, receiving an instruction signal and outputting an image frame signal.
As an improvement, the camera structural member consists of a front panel, a rear panel, a middle frame, an anti-irradiation glass groove and an anti-irradiation 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. Four perforated screws are adopted for fixing the three rigid plates, 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 volume of the system, and realizes the automatic focusing function of the moving satellite-borne ultra-miniature monitoring camera on the premise of not increasing the volume of the camera.
According to the invention, the front end of the lens is additionally provided with the anti-irradiation glass, and the anti-irradiation 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 invention adopts a special rigid-flexible board structure, the rigid-flexible board adopts a multi-layer circuit board structure, the rigid board is used for arranging components and parts, the flexible board is used for connection, an inter-board connector is not used in the camera, the effective area of the rigid board is furthest used, 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, so that the system power consumption is reduced and the data rate of camera data transmission is improved.
Drawings
Fig. 1 is a schematic view of the structure 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-irradiation glass assembly of the satellite-borne ultra-miniature monitoring camera of the present invention.
Fig. 3 is a schematic diagram of a special rigid-flexible integrated circuit board structure of the satellite-borne ultra-miniature surveillance camera.
Fig. 4 is a schematic diagram of a cover plate structure of a satellite-borne ultra-miniature monitoring camera according to the present invention.
As shown in the figure: 1. an irradiation-resistant glass locking surface; 2. an anti-radiation glass; 3. a radiation-resistant glass tank; 4. automatically focusing a voice coil motor lens; 5. a first rigid plate; 6. the first flexible connection is carried out; 7. a rigid plate II; 8. flexible connection II; 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 (5) overlapping the holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an on-board ultra-miniature surveillance camera comprises an anti-irradiation glass component, an auto-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 board 1, rigid board 2, rigid board 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 plate 2 and the rigid plate 3, transmitting the image data processed by the signal processing module to the interface circuit module, and the external connector on the rigid plate 3 is used for outputting the image data of the camera and receiving external control instructions. The voice coil motor lens is adhered to the rigid plate 1 by adopting silica gel, and is fixed by adopting a structural member in a pressing way, and the anti-radiation glass is arranged between the anti-radiation glass groove and the locking surface of the anti-radiation glass, so that the image sensor is protected from being damaged by high-energy particles in a receiving space. The special rigid-flexible integrated circuit board is mounted on the camera component and is comprised by the camera housing.
Referring to fig. 3, the first flexible connection 6 is located between the first rigid board 5 and the second rigid board 7, and is used for transmitting an output signal of the image sensor, and transmitting a 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 the data interface chip on the data interface circuit and transmitting the instruction signals input by the instruction interface chip to the FPGA for instruction analysis. Because the volume of the inter-board connector is large, the design method of adopting flexible connection to replace the inter-board connector maximizes the layout and wiring of devices on the rigid board, greatly saves the space and reduces the volume.
After the installation, the first rigid plate 5, the second rigid plate 7 and the third rigid plate 9 are positioned in parallel, 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, the first rigid plate 5 and the second rigid plate 7 are fixed by adopting phi 3 studs, the structure is simple, the mechanical effect is good, and the occupied space is small.
Referring to fig. 2, 1 is an anti-radiation glass locking surface, 2 is anti-radiation glass, 10 is a camera structural member, 5 is a rigid plate I, 4 is an automatic focusing voice coil motor lens, 11 is a screw I of the anti-radiation glass locking surface, 12 is a screw II of a fixed circuit board, and 3 is an anti-radiation glass groove. The anti-irradiation glass 2 is arranged between the anti-irradiation glass locking surface 1 and the anti-irradiation glass groove 3, and is fixed by adopting four fixing screws. The automatic focusing voice coil lens 4 is adhered to the first rigid plate 5, is pressed on the back surface of the irradiation-resistant glass groove 3, and is fixed by fixing screws.
Referring to fig. 4, a cover 13 is provided to cover the rear end of the camera housing, wherein 15 is a lap joint hole, 14 is a connector window, and the external connector is connected with the cable through the window.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (7)
1. The satellite-borne ultra-miniature monitoring camera is characterized by comprising a camera shell, wherein a camera structural member (10) is arranged in the camera shell, a special rigid-flexible integrated circuit board is fixedly arranged in the camera structural member (10) through a screw II (12), a focal plane module, a signal processing module and an interface circuit module are arranged on the special rigid-flexible integrated circuit board, an automatic focusing voice coil motor lens (4) is arranged at the head end of one end of the special rigid-flexible integrated circuit board, and an anti-radiation glass component is covered on 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 part (10), wherein 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), the focal plane module is electrically connected to the first rigid board (5), the signal processing module is electrically connected to the second rigid board (7), the interface circuit module is electrically connected to the third rigid board (9), the auto-focusing motor lens (4) is arranged on the side surface of the first rigid board (5), the second rigid board (7) and the third rigid board (9) are positioned in parallel, the first rigid board (5) is fixed on a front panel, the third rigid board (9) is fixed on a rear panel, and the first rigid board (5) and the second rigid board (7) is fixed by adopting a stud 3 phi;
the anti-radiation glass assembly comprises an anti-radiation glass locking surface (1) which covers the automatic focusing voice coil motor lens (4) and is used for pressing the automatic focusing voice coil motor lens (4), the anti-radiation glass locking surface (1) is fixed on a camera structural member (10) through a first screw (11), an anti-radiation glass groove (3) is formed between the automatic focusing voice coil motor lens (4) and the anti-radiation glass locking surface (1), and anti-radiation glass (2) is arranged in the anti-radiation glass groove (3);
the automatic focusing voice coil motor lens (4) is composed of a voice coil motor, an optical lens and a supporting structure, wherein the optical lens is fixed on the voice coil camera, the supporting structure is stuck on a first rigid plate (5) by adopting silica gel, and the front of the supporting structure is tightly pressed on the irradiation-resistant glass locking surface (1).
2. The on-board ultra-miniature surveillance camera of claim 1, wherein: the anti-radiation glass (2) is thickened coated optical glass.
3. The on-board ultra-miniature surveillance camera of claim 1, wherein: the focal plane module consists of an image sensor and a power supply circuit, the image sensor is used for converting visible light into electric signals and outputting image data streams, and the power supply circuit consists of two LDO voltage stabilizing chips LDO_A and LDO_B and is used for supplying power to the inner core and the structure of the image sensor.
4. The on-board ultra-miniature surveillance camera of claim 1, wherein: the signal processing module consists of 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 consists of a switch-type DCDC and an LDO.
5. The on-board ultra-miniature surveillance camera of claim 1, wherein: the interface circuit module comprises an instruction interface chip, a data interface chip and an external connector.
6. The on-board ultra-miniature surveillance camera of claim 5, wherein: the command interface chip is in an input mode, adopts 422 asynchronous serial port protocol, the data interface chip is in an output mode, adopts three-wire LVDS protocol, and the external connector is used for connecting a camera cable, receiving command signals and outputting image frame signals.
7. The on-board ultra-miniature surveillance camera of claim 1, wherein: the camera shell tail end is fixed with a cover plate (13) through a bolt, 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 CN113660403A (en) | 2021-11-16 |
| CN113660403B true CN113660403B (en) | 2023-06-02 |
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