CN109462721B - Area array swinging imaging system with focal plane and video processing separated - Google Patents

Area array swinging imaging system with focal plane and video processing separated Download PDF

Info

Publication number
CN109462721B
CN109462721B CN201811339344.XA CN201811339344A CN109462721B CN 109462721 B CN109462721 B CN 109462721B CN 201811339344 A CN201811339344 A CN 201811339344A CN 109462721 B CN109462721 B CN 109462721B
Authority
CN
China
Prior art keywords
video processing
detector
clock
focal plane
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201811339344.XA
Other languages
Chinese (zh)
Other versions
CN109462721A (en
Inventor
余达
刘金国
周怀得
翟岩
梅贵
浦前帅
张续严
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changchun Institute of Optics Fine Mechanics and Physics of CAS
Original Assignee
Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changchun Institute of Optics Fine Mechanics and Physics of CAS filed Critical Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority to CN201811339344.XA priority Critical patent/CN109462721B/en
Publication of CN109462721A publication Critical patent/CN109462721A/en
Application granted granted Critical
Publication of CN109462721B publication Critical patent/CN109462721B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof

Abstract

An area array swinging imaging system with a focal plane separated from video processing relates to an area array swinging imaging system based on the separation of the focal plane and the video processing, and solves the problems that the existing area array swinging imaging places the focal plane and the video processing of a detector on a swinging optical machine structure, the rotating inertia of a swinging part is increased, the current of a torque motor is increased, and the electromagnetic radiation around is enhanced; the video processing component comprises a servo control unit, a gyroscope, a servo motor, an encoder, three groups of video processing units and three groups of quick reflectors; the focal plane assembly comprises three detector focal plane groups which are distributed and installed in a triangle shape, only the focal plane is placed on the rotating part, the rotational inertia of the swinging part can be greatly reduced, and meanwhile, the heat consumption on the optical-mechanical structure is reduced; by optimizing the connection design of the focal plane and the video processing, the interference resistance torque for motor control is reduced under the condition of ensuring the signal transmission quality.

Description

Area array swinging imaging system with focal plane and video processing separated
Technical Field
The invention relates to an area array swinging imaging system based on separation of focal plane and video processing, in particular to an area array swinging imaging system based on separation of focal plane and video processing for aerospace application.
Background
The area array swing scanning imaging can break through the limitation of the imaging width of the detector and save the number of the detectors. To reduce interference and improve signal integrity, area array swing imaging typically places both the detector focal plane and video processing on a swinging opto-mechanical structure. The problems exist that the moment of inertia of the swing part is increased, the current of the torque motor is increased, and the electromagnetic radiation around is enhanced; the video processing part has larger power consumption, the thermal deformation of the optical machine structure is easily caused without heat dissipation measures, and the heat conduction on the rotating part is difficult.
Disclosure of Invention
The invention aims to solve the problems that the prior area array swing imaging places the focal plane and the video processing of a detector on a swing optical-mechanical structure, and the rotational inertia of a swing part is increased, the current of a torque motor is increased, and the electromagnetic radiation around the swing part is enhanced; the power consumption of the video processing part is large, the heat conduction on the rotating part is difficult, and the like, and the planar array swinging imaging system with the focal plane separated from the video processing is provided.
The area array swinging imaging system with the focal plane separated from the video processing comprises a focal plane assembly arranged on a rotating part and a video processing assembly arranged on a fixed part; the focal plane assembly is connected with the video processing assembly through a connector; the video processing assembly comprises a servo control unit and three groups of video processing units;
the focal plane assembly comprises three detector focal plane groups, a gyroscope, a servo motor, an encoder and three quick reflectors, wherein the detector focal plane groups are distributed and installed in a delta shape;
the servo control unit controls the servo motor and the three groups of quick reflectors and uses the gyroscope for servo feedback; the servo control unit is simultaneously connected with the satellite platform interface and controls the three groups of video processing units;
each group of video processing units comprises an imaging controller, an analog-to-digital converter, a driving signal generating circuit, a clock generating circuit and an external communication and control circuit;
the power supply and bias circuit supplies power and bias to the detector;
the pre-amplifier circuit adjusts the level and power of the analog differential image signal output by the detector, converts the analog differential image signal into digital image data by the analog-to-digital converter and sends the digital image data to the imaging controller;
clock signal generated by the imaging controller is subjected to clock shunting through the clock signal generating circuit and is transmitted to the differential-to-single-ended clock circuit, and the differential-to-single-ended clock circuit converts a differential clock subjected to clock shunting into a single-ended clock and transmits the single-ended clock to the detector;
the imaging controller generates a control signal required by the detector, a single-ended control signal is output to the signal inverter circuit after level conversion and signal isolation are carried out by the driving signal generating circuit, and the single-ended control signal is output to the detector after Schmidt shaping is carried out by the signal inverter circuit;
the external communication and control circuit is used for carrying out external communication control, converting an externally input signal and then transmitting the signal into the imaging controller, and carrying out level conversion on a signal output by the imaging controller and then outputting the signal to the satellite platform.
The invention has the beneficial effects that:
the swing scanning imaging system reduces the rotational inertia of a rotating part, can reduce the power consumption of a torque motor, and simultaneously reduces the electromagnetic interference of the torque motor to an imaging and control part;
the swing scanning imaging system reduces heat consumption on the optical machine structure and reduces thermal deformation of the optical machine caused by heat.
Drawings
FIG. 1 is a schematic block diagram of an area array swept imaging system with focal plane and video processing separated according to the present invention;
FIG. 2 is a schematic diagram of a detector focal plane group and a video processing unit in an area array swept imaging system with focal plane and video processing separated according to the present invention.
FIG. 3 is a schematic diagram of the distribution of the focal plane groups and video processing units of the detector in the area array swept imaging system with the focal plane separated from the video processing according to the present invention;
FIG. 4 is a schematic diagram of the clock and control signal output form of the video processing part in the area array sweep imaging system with separated focal plane and video processing according to the present invention.
Detailed Description
First embodiment, the area array scanning imaging system with separated focal plane and video processing, which is described in conjunction with fig. 1 to 4, includes a focal plane assembly mounted on a rotating component and a video processing assembly mounted on a fixed component; the focal plane assembly is connected with the video processing assembly through a rigid flex belt or an impedance control cable and a connector; the video processing assembly comprises a servo control unit and three groups of video processing units;
the focal plane assembly comprises three detector focal plane groups, a gyroscope, a servo motor, an encoder and three quick reflectors, wherein the detector focal plane groups are distributed and installed in a delta shape; the servo control unit controls the servo motor and the three groups of quick reflectors and uses the gyroscope for servo feedback; the servo control unit is simultaneously connected with the satellite platform interface and controls the three groups of video processing units; each group of video processing units comprises an imaging controller, an analog-to-digital converter, a driving signal generating circuit, a clock generating circuit and an external communication and control circuit;
the power supply and bias circuit supplies power and bias to the detector; the pre-amplifier circuit adjusts the level and power of the analog differential image signal output by the detector, converts the analog differential image signal into digital image data by the analog-to-digital converter and sends the digital image data to the imaging controller; clock signal generated by the imaging controller is subjected to clock shunting through the clock signal generating circuit and is transmitted to the differential-to-single-ended clock circuit, and the differential-to-single-ended clock circuit converts a differential clock subjected to clock shunting into a single-ended clock and transmits the single-ended clock to the detector;
the imaging controller generates a control signal required by the detector, a single-ended control signal is output to the signal inverter circuit after level conversion and signal isolation are carried out by the driving signal generating circuit, and the single-ended control signal is output to the detector after Schmidt shaping is carried out by the signal inverter circuit;
the external communication and control circuit is used for carrying out external communication control, converting an externally input signal and then transmitting the signal into the imaging controller, and carrying out level conversion on a signal output by the imaging controller and then outputting the signal to the satellite platform.
In this embodiment, the clock output from the clock generation circuit of the video processing unit to each detector is output through a clock splitter using a single set of clocks, the type of clock frequency required by a single-chip detector is n, the number required by m detectors is m × n, m × n clocks are provided by n clock splitters, and the single clock splitter outputs m clock signals having the same frequency. And each control signal is output by adopting an independent pin under the condition of ensuring the phase determined by the output clock, and the output phase is adjustable, namely the number of the control signals output by the controller is mxp. And p is the number of control signals required by the monolithic detector.
In this embodiment, the period of the sweep operation of the imaging system is divided into the initial position setting, accelerating and uniform swinging stages, and the period time of the sweep operation cycle is determined by the forward image moving speed determined by the corresponding track height H, the pixel size γ of the detector, and the resolution a of the detector along the track and the overlapping rate k of the detector along the track directionoverlap_yAnd (6) determining.
Figure BDA0001862116120000031
In the present embodiment, the frame rate f of the probeapply_frameFrom the angular velocity v of the oscillation in the uniform oscillation phasemirrorResolution b of detector in vertical rail direction and focal length f of optical systemopticOverlap ratio k in the vertical directionoverlapThe maximum exposure time is determined by the orbital motion speed determined by the height H of the track and the allowable amount of orbital motion lcFocal length f of optical systemopticAngular velocity v at uniform swing stagemirrorAnd the capacitance C and the maximum stroke L of the piezoelectric ceramic fast reflecting mirrorpiezo_maxAnd corresponding maximum operating voltage Vpiezo_maxFast-reverse optical magnification koptic_ampAllowable peak power consumption P of fast mirrorpiezoAnd (6) determining.
Figure BDA0001862116120000041
Figure BDA0001862116120000042
And is
Figure BDA0001862116120000043
G-universal gravitation constant;
M-Earth mass;
r-mean earth radius;
h-mean ground clearance of satellite
In the embodiment, in order to reduce the connection signals of the focal plane assembly and the video processing assembly of the detector and ensure the signal transmission quality, the input clock of the detector adopts a differential form, the input low-frequency control signal adopts a single-ended form, and the output analog video signal adopts a differential form for output. Number n of output channels selected by the detectorchannelMaximum frame frequency f by detectorsensor_frame_maxMaximum pixel clock fsensor_pixclk_maxFrame rate f required for the applicationapply_frameAnd a maximum clock frequency f of the analog-to-digital converter of the video processing sectionADC_pixclk_maxAnd (6) determining.
Figure BDA0001862116120000044
Minimum pin number n of connector of detector focal plane assembly and video processing assembly in this embodimentconnectorBy the number n of clocks inputclock_inNumber n of low frequency single ended control signalscontrol_sig_inN, the number of channels of the output video signalchannelAnd the number n of input power typespower_inAnd (6) determining.
nconnector≥3nclock_in+ncontrol_sig_in+3nchannel+2npower_in
The detector in the focal plane assembly described in the present embodiment adopts an area array infrared sensor of xenics corporation; the video processing component adopts FPGA 6vlx550tff1760 of Xilinx company; the focal plane assembly and video processing assembly employ a high cost air corporation HJ30J connector and cable assembly.

Claims (6)

1. The area array swinging imaging system with separated focal plane and video processing is characterized in that: comprises a focal plane assembly arranged on a rotating part and a video processing assembly arranged on a fixed part; the focal plane assembly is connected with the video processing assembly through a connector;
the video processing assembly comprises a servo control unit and three groups of video processing units;
the focal plane assembly comprises three detector focal plane groups, a gyroscope, a servo motor, an encoder and three quick reflectors, wherein the detector focal plane groups are distributed and installed in a delta shape;
the servo control unit controls the servo motor and the three groups of quick reflectors and uses the gyroscope for servo feedback; the servo control unit is simultaneously connected with the satellite platform interface and controls the three groups of video processing units;
each detector focal plane group comprises a detector, a power supply and bias circuit, a differential-to-single-ended clock circuit, a signal inverter circuit and a pre-amplifier circuit;
each group of video processing units comprises an imaging controller, an analog-to-digital converter, a driving signal generating circuit, a clock generating circuit and an external communication and control circuit;
the power supply and bias circuit supplies power and bias to the detector;
the pre-amplifier circuit adjusts the level and power of the analog differential image signal output by the detector, converts the analog differential image signal into digital image data by the analog-to-digital converter and sends the digital image data to the imaging controller;
clock signal generated by the imaging controller is subjected to clock shunting through the clock signal generating circuit and is transmitted to the differential-to-single-ended clock circuit, and the differential-to-single-ended clock circuit converts a differential clock subjected to clock shunting into a single-ended clock and transmits the single-ended clock to the detector;
the imaging controller generates a control signal required by the detector, a single-ended control signal is output to the signal inverter circuit after level conversion and signal isolation are carried out by the driving signal generating circuit, and the single-ended control signal is output to the detector after Schmidt shaping is carried out by the signal inverter circuit;
the external communication and control circuit is used for carrying out external communication control, converting an externally input signal and then transmitting the signal into the imaging controller, and carrying out level conversion on a signal output by the imaging controller and then outputting the signal to the satellite platform.
2. The focal plane and video processing separated area array swept imaging system of claim 1, wherein:
the clock output to each detector by the clock generating circuit of the video processing unit is output by a clock splitter through a single group of clocks, the type of the clock frequency required by the single-chip detector is n, the number required by the m-chip detectors is m multiplied by n, the m multiplied by n clocks are provided by the n clock splitters, and the single clock splitter outputs m clock signals with the same frequency.
3. The focal plane and video processing separated area array swept imaging system of claim 1, wherein:
under the condition of synchronous output clock, each control signal output by the driving signal generating circuit is output by adopting an independent pin, the output phase is adjustable, the number of the control signals output by the controller is mxp, and p is the number of the control signals required by the monolithic detector.
4. The focal plane and video processing separated area array swept imaging system of claim 1, wherein:
the period of the sweep operation of the imaging system is divided into the stages of initial position setting, acceleration and uniform swing, and the sweep operation cycle period tperiodThe forward image movement speed determined by the corresponding track height H, the pixel size gamma of the detector, the resolution (the number of pixels along the track) a of the detector along the track, and the overlapping rate k along the trackoverlap_yDetermining;
Figure FDA0002451249070000021
g is the gravitational constant, M is the earth mass, R is the mean earth radius, fopticIs the focal length of the optical system.
5. The focal plane and video processing separated area array swept imaging system of claim 1, wherein: frame frequency f of the detectorapply_frameFrom the angular velocity v of the oscillation in the uniform oscillation phasemirrorResolution in the vertical-rail direction of the detector (vertical rail)Number of pixels in direction) b, focal length f of optical systemopticOverlap ratio k in the vertical directionoverlap_vAnd the pixel size gamma of the detector, expressed as:
Figure FDA0002451249070000022
detector exposure time the speed of the orbital movement determined by the height H of the track, the amount of orbital movement allowed icFocal length f of optical systemopticAngular velocity v at uniform swing stagemirrorAnd the capacitance C and the maximum stroke L of the piezoelectric ceramics in the quick reflectorpiezo_maxAnd corresponding maximum operating voltage Vpiezo_maxOptical magnification k of fast mirroroptic_ampAllowable peak power consumption P of fast mirrorpiezoDetermining; is formulated as:
Figure FDA0002451249070000031
and is
Figure FDA0002451249070000032
6. The focal plane and video processing separated area array swept imaging system of claim 1, wherein:
the number n of output channels selected by the detectorchannelMaximum frame frequency f by detectorsensor_frame_maxMaximum pixel clock fsensor_pixclk_maxFrame rate f required for the applicationapply_frameAnd the maximum clock frequency f of the analog-to-digital converter in the video processing unitADC_pixclk_maxDetermining; represented by the formula:
Figure FDA0002451249070000033
minimum pin number n of connector of focal plane assembly and video processing assemblyconnectorFrom the fluid deliveryNumber of incoming clocks nclock_inNumber n of low frequency single ended control signalscontrol_sig_inN, the number of channels of the output video signalchannelAnd the number n of input power typespower_inDetermining; represented by the formula:
nconnector≥3nclock_in+ncontrol_sig_in+3nchannel+2npower_in。
CN201811339344.XA 2018-11-12 2018-11-12 Area array swinging imaging system with focal plane and video processing separated Expired - Fee Related CN109462721B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811339344.XA CN109462721B (en) 2018-11-12 2018-11-12 Area array swinging imaging system with focal plane and video processing separated

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811339344.XA CN109462721B (en) 2018-11-12 2018-11-12 Area array swinging imaging system with focal plane and video processing separated

Publications (2)

Publication Number Publication Date
CN109462721A CN109462721A (en) 2019-03-12
CN109462721B true CN109462721B (en) 2020-06-09

Family

ID=65610085

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811339344.XA Expired - Fee Related CN109462721B (en) 2018-11-12 2018-11-12 Area array swinging imaging system with focal plane and video processing separated

Country Status (1)

Country Link
CN (1) CN109462721B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109799762B (en) * 2019-03-20 2021-06-29 中国科学院长春光学精密机械与物理研究所 Control system for area array swing scanning imaging
CN109905618B (en) * 2019-03-26 2021-03-16 中国科学院长春光学精密机械与物理研究所 Sandwich imaging unit structure and one-step sample design method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107367267A (en) * 2017-07-28 2017-11-21 长光卫星技术有限公司 The method that aerial surveying camera and boat based on the imaging of stepping framing type take the photograph imaging
CN107388904A (en) * 2017-06-13 2017-11-24 河北汉光重工有限责任公司 Laser signal resolves and servo control integrated processing system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009066252A2 (en) * 2007-11-23 2009-05-28 Koninklijke Philips Electronics N.V. Multi-focal spot generator and multi-focal multi-spot scanning microscope
CN101520343B (en) * 2009-03-25 2010-11-17 中国科学院上海技术物理研究所 Assembling and aligning device and method for thermal infrared spectrum imaging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107388904A (en) * 2017-06-13 2017-11-24 河北汉光重工有限责任公司 Laser signal resolves and servo control integrated processing system
CN107367267A (en) * 2017-07-28 2017-11-21 长光卫星技术有限公司 The method that aerial surveying camera and boat based on the imaging of stepping framing type take the photograph imaging

Also Published As

Publication number Publication date
CN109462721A (en) 2019-03-12

Similar Documents

Publication Publication Date Title
CN109462721B (en) Area array swinging imaging system with focal plane and video processing separated
CN107589428B (en) Multi-area array APD array-based composite mode laser radar imaging system
KR20090025294A (en) Solid-state image pickup device, data transmitting method and image pickup device
CN105371960A (en) Circumferential scanning imaging control method and circumferential scanning imaging system
JP2014095788A (en) Driving control device and driving control method and video output device
CN201653553U (en) Infrared panoramic imaging device
CN106791328A (en) A kind of aviation CCD imaging systems and aircraft
WO2019039728A1 (en) Ultra-small three-dimensional scanning lidar sensor
CN107819993A (en) A kind of device and method that large area scanning imaging is realized using photodetector array
CN102623883A (en) Range-gated synchronous control device based on pulse laser scattering light synchronization
CN101146184A (en) Full-frame CCD drive circuit supporting multiple output modes and electronic image shift compensation
CN104571142B (en) A kind of atmospheric parameter tracing measurement system
CN110493516B (en) Different-speed image motion compensation device and system
US9438838B2 (en) Imaging element and imaging apparatus
JPH06319080A (en) Push bloom scanning type image pickup device
EP3471086B1 (en) Image sensing circuit and image depth sensing system
EP0534669B1 (en) Thermal imaging apparatus
RU2420770C1 (en) Unified thermal imaging device
RU133377U1 (en) THERMAL VISION DEVICE
JPH06133209A (en) Turning image pickup device
CN214202159U (en) Image stabilizing device based on micro-motion mechanism
CN207964085U (en) A kind of imaging system of small-sized subdivided spectral imager
KR102473410B1 (en) Adc circuit and ois apparatus with stable ois control
CN101500154A (en) High frame rate photosensitive diode array electronic camera
JP2752913B2 (en) 3D image capturing device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200609

Termination date: 20211112

CF01 Termination of patent right due to non-payment of annual fee