CN103308285A - Filter wheel and focusing control liquid crystal display system of space camera - Google Patents
Filter wheel and focusing control liquid crystal display system of space camera Download PDFInfo
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- CN103308285A CN103308285A CN 201310254031 CN201310254031A CN103308285A CN 103308285 A CN103308285 A CN 103308285A CN 201310254031 CN201310254031 CN 201310254031 CN 201310254031 A CN201310254031 A CN 201310254031A CN 103308285 A CN103308285 A CN 103308285A
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Abstract
The invention relates to the field of space camera control and provides a filter wheel and focusing control liquid crystal display system of a space camera. The filter wheel and focusing control liquid crystal display system comprises an upper computer control unit, a filter wheel and focusing control unit, a focusing executing mechanism and a filter wheel adjustment executing mechanism; two-way communication is performed on the filter wheel and focusing control unit and the upper computer control unit; the filter wheel and focusing control unit provides system state parameters for the upper computer control unit; the upper computer control unit sends control commands and data parameters to the filter wheel and focusing control unit; the filter wheel and focusing control unit sends stepper motor driving signals to the filter wheel adjustment executing mechanism to control operation of the filter wheel adjustment executing mechanism; the filter wheel adjustment executing mechanism provides code value signals of a filter wheel encoder for the filter wheel and focusing control unit; the filter wheel and focusing control unit sends stepper motor driving signals to the focusing executing mechanism to control operation of the focusing executing mechanism; and the focusing executing mechanism provides code value signals of the filter wheel encoder for the filter wheel and focusing control unit. According to the filter wheel and focusing control liquid crystal display system of the space camera, working modes are selected and system parameters are set according to different experiment purposes to achieve closed loop control on a filter wheel and focusing, perform real-time display on the state parameters and achieve multi-function control.
Description
Technical field
The present invention relates to the space camera control field, be specifically related to a kind of space camera filter wheel and focusing control liquid crystal display systems.
Background technology
Space camera has a wide range of applications in various fields such as military surveillance, weather forecast, resource exploration and environmental monitorings as the important useful load of remote sensing satellite.In order to improve the resolution to targets such as specific crops, ocean, atmosphere, soil, space camera adopts multi-optical spectrum imaging technology more, by the optical filter imaging of some particular colors.Filter wheel can fine adjustment optical filter position, and the switching imaging spectral coverage is realized multispectral imaging.Because space environment changes, and camera focal plane is subjected to displacement, at this moment need to carry out focal plane and regulate to avoid out of focus, when satellite is adjusted attitude and switching track, also need to focus equally, to guarantee imaging definition.
Before space camera launches as load, need to carry out on ground a large amount of test experiments, the checking appellative function also carries out seasoned experiment.For filter wheel and focusing control system, uphole equipment adopts motor driver plus signal generator that stepper motor is driven mostly at present, because control mode and function singleness, can't satisfy the requirement of above-mentioned experiment, so a kind of diverse in function of active demand, degree of accuracy is high, easy to use, reliability is high and portable space camera filter wheel and focusing control liquid crystal display systems.
Summary of the invention
The control mode and the function singleness that exist in order to solve prior art, can't satisfy the technical matters of requirement of experiment, the invention provides a kind of space camera filter wheel and focusing control liquid crystal display systems, can be for different experiment purposes, carrying out duty selects, state parameter is set, and can shows in real time the state parameter of whole system.
The technical scheme that technical solution problem of the present invention is taked is as follows:
A kind of space camera filter wheel comprises with focusing control liquid crystal display systems: filter wheel and focusing control module, PC control unit, focusing topworks and filter wheel adjustment actuating mechanism; Filter wheel links to each other with the PC control unit with the focusing control module, when system's on-line working, carry out both-way communication, filter wheel provides system status parameters with the focusing control module to the host computer control module, and the PC control unit sends control command and data parameters to filter wheel and focusing control module; Filter wheel links to each other with the filter wheel adjustment actuating mechanism with the focusing control module, filter wheel sends the operation of stepping motor drive signal control filter wheel adjustment actuating mechanism with the focusing control module to the filter wheel adjustment actuating mechanism, and the filter wheel adjustment actuating mechanism provides the code value signal of filter wheel scrambler to filter wheel and focusing control module; Filter wheel links to each other with focusing topworks with the focusing control module, filter wheel sends the operation of stepping motor drive signal control focusing topworks with the focusing control module to focusing topworks, and focusing topworks provides the code value signal of focusing encoder to filter wheel and focusing control module.
Above-mentioned filter wheel comprises with the focusing control module: microprocessor, system control switch and push-button unit, liquid crystal display, focusing motor-drive circuit and filter wheel motor-drive circuit; System control switch and push-button unit link to each other with microprocessor, and system control switch and push-button unit provide switch and push button signalling to microprocessor, to be used for the control command under switched system mode of operation and the generation offline mode; Microprocessor links to each other with liquid crystal display, and microprocessor provides the working status parameter of system to liquid crystal display, to be used in real time demonstration; Microprocessor links to each other with the filter wheel motor-drive circuit, and microprocessor provides the drive and control of electric machine signal to the filter wheel motor-drive circuit, and produces actual motor drive signal by the filter wheel motor-drive circuit; Microprocessor links to each other with the focusing motor-drive circuit, and microprocessor provides the drive and control of electric machine signal to the focusing motor-drive circuit, and produces actual motor drive signal by the focusing motor-drive circuit.
Above-mentioned filter wheel adjustment actuating mechanism comprises: filter wheel stepper motor, filter wheel governor motion and filter wheel scrambler communication unit; The filter wheel motor-drive circuit links to each other with the filter wheel stepper motor, and the filter wheel motor-drive circuit provides motor drive signal to the filter wheel stepper motor, the start and stop of control motor, speed and rotation direction; The filter wheel stepper motor links to each other with the filter wheel governor motion, and the filter wheel stepper motor drives the work of filter wheel governor motion; The filter wheel governor motion links to each other with filter wheel scrambler communication unit, and the filter wheel governor motion drives filter wheel scrambler communication unit and rotates; Filter wheel scrambler communication unit links to each other with microprocessor, and filter wheel scrambler communication unit regularly sends the current code value of filter wheel scrambler to microprocessor.
Above-mentioned focusing topworks comprises: focusing stepper motor, focus adjusting mechanism and focusing encoder communication unit; The focusing motor-drive circuit links to each other with the focusing stepper motor, and the focusing motor-drive circuit provides motor drive signal to the focusing stepper motor, the start and stop of control motor, speed and rotation direction; The focusing stepper motor links to each other with focus adjusting mechanism, and the focusing stepper motor drives focus adjusting mechanism work; Focus adjusting mechanism links to each other with the focusing encoder communication unit, and focus adjusting mechanism drives the focusing encoder communication unit and rotates; The focusing encoder communication unit links to each other with microprocessor, and the focusing encoder communication unit regularly sends the current code value of focusing encoder to microprocessor.
Above-mentioned PC control unit comprises a PC, and PC links to each other with microprocessor, and PC provides control command and data parameters by system control interface to microprocessor, and microprocessor provides state parameter for its real-time demonstration to PC.
Principle of work of the present invention is: the PC control unit plays control and the effect that shows when online mode; Filter wheel is the core institution of system control with the focusing control module, carries out serial communication with other unit, and the processing controls order produces and drives signal, the real-time display system state parameter, and work in the offline mode control system; Filter wheel adjustment actuating mechanism and focusing topworks are the topworks of system.Filter wheel is divided into online mode and offline mode dual mode with the mode of operation of focusing control liquid crystal display systems, and described online mode refers to be connected with the PC control unit, by the mode of operation of upper computer control system work; Described offline mode refers to that system breaks away from PC control, and oneself works alone, and is controlled the mode of operation of its work by system control switch and push-button unit.Switching working mode is controlled by the mode selector switch in system control switch and the push-button unit.
Under online mode, system is connected with the PC control unit, carry out two-way RS_485 communication, the PC control unit sends control command and data parameters to filter wheel and focusing control module, and filter wheel provides system status parameters with the focusing control module to the host computer control module.Control command and data parameters are produced and are sent by the operation interface of host computer, and operation interface can the every state parameter of real-time display system simultaneously.
Under offline mode, system and PC control unit disconnect, and this moment, system can work alone and switch and button by system control switch and push-button unit operate control to system.
Under above-mentioned two kinds of mode of operations, liquid crystal display all can be at every state parameter of liquid crystal display display system on screen.
The invention has the beneficial effects as follows: this system can be for different experiment purposes, select different mode of operations, systematic parameter is set, realization is to the closed-loop control of filter wheel and focusing, the real-time display system state parameter, realization can effectively be carried out space camera ground functional experiment and seasoned experiment to the multi-functional control of filter wheel and focusing, has great economic and social benefit.
Description of drawings
Fig. 1 is the structured flowchart that liquid crystal display systems is controlled in space camera filter wheel of the present invention and focusing.
Fig. 2 is the circuit diagram of the filter wheel among the present invention and the control module of focusing.
Fig. 3 is the PC control interface schematic diagram among the present invention.
Fig. 4 is liquid crystal display among the present invention and the schematic diagram of system control switch and push-button unit.
Fig. 5 is the microprocessor Serial data receiving process flow diagram among the present invention.
Fig. 6 is the filter wheel closed-loop control process flow diagram among the present invention.
Fig. 7 is the focusing closed-loop control process flow diagram among the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
As shown in Figure 1, space camera filter wheel of the present invention comprises with focusing control liquid crystal display systems: filter wheel and focusing control module, PC control unit, focusing topworks and filter wheel adjustment actuating mechanism; Described filter wheel comprises with the focusing control module: microprocessor, system control switch and push-button unit, liquid crystal display, focusing motor-drive circuit and filter wheel motor-drive circuit; Described filter wheel adjustment actuating mechanism comprises: filter wheel stepper motor, filter wheel governor motion and filter wheel scrambler communication unit; Described focusing topworks comprises: focusing stepper motor, focus adjusting mechanism and focusing encoder communication unit; Described PC control unit comprises a PC.
As shown in Figure 2, filter wheel is comprised of filter wheel and focusing control processor, UART serial port extended chip, RS_485 level shifting circuit with the focusing control module; Filter wheel adopts single chip computer AT 90C516RD+ with the focusing control processor, main being responsible for carried out communication with PC, filter wheel scrambler communication unit, focusing encoder communication unit, receive, send control command and data parameters, and processing controls order and data parameters, produce stepper motor drive control signal and LCDs control signal; UART serial port extended chip adopts the SP2338 chip, solve embedded scm UART interface problem very little, can make a UART serial port be extended to 3 brand-new full duplex UART serial ports, all UART serial ports are independent receive data and transmission data simultaneously; The RS_485 level shifting circuit is by RS_485 interface chip U
1, triode Q
1, resistance R
1, resistance R
2, resistance R
3, resistance R
4, resistance R
5Form, realize the TTL-RS_485 level conversion, wherein RS_485 interface chip U
1Adopt MAX485 chip, triode Q
1Employing 9014, resistance R
1Be 10K Ω, resistance R
2Be 12K Ω, resistance R
3Be 1.2K Ω, resistance R
4Be 1.2K Ω, resistance R
5Be 120K Ω.
As shown in Figure 3, the control interface of above-mentioned PC is comprised of filter wheel control interface and focusing control interface; Filter wheel turned position, stepper motor velocity of rotation, real-time display encoder code value can be controlled in filter wheel control interface; Focusing stepper motor velocity of rotation, focus adjusting mechanism shift position, real-time display encoder code value can be controlled in focusing control interface.
As shown in Figure 4, system control switch and push-button unit and liquid crystal display mainly are divided into filter wheel part and focusing part; System control switch and push-button unit are comprised of focusing control mode switch switch 1, system power supply switch 2, focusing control cruise switch 4, focusing control reversal switch 5, focusing control forward switch 6, filter wheel control forward switch 7, filter wheel control reversal switch 8, filter wheel control cruise switch 9, filter wheel control mode switch switch 11; Liquid crystal display is comprised of the first LCDs 3 and the second LCDs 10, and its display format as shown in Figure 4.
Space camera filter wheel of the present invention is as follows with the course of work of focusing control liquid crystal display systems:
1) the system works pattern is divided into online mode and offline mode dual mode.Online mode refers to be connected with the PC control unit, by the mode of operation of upper computer control system work; Offline mode refers to that system breaks away from PC control, and oneself works alone, and is controlled the mode of operation of its work by system control switch and push-button unit.Can switching working mode by the mode selector switch in system control switch and the push-button unit.Under online mode, system is connected with the PC control unit, carry out two-way RS_485 communication, the PC control unit sends control command and data parameters to filter wheel and focusing control module, and filter wheel provides system status parameters with the focusing control module to the host computer control module.Control command and data parameters are produced and are sent by the host computer operation interface, and operation interface can the every state parameter of real-time display system simultaneously.Under offline mode, system and PC control unit disconnect, and this moment, system can work alone and switch and button by system control switch and push-button unit operate control to system.Under above two kinds of mode of operations, liquid crystal display all can be at the every state parameter of liquid crystal display display system on screen.
2) system adopts stepper motor as the driving element of filter wheel with the focusing control gear, control mode is four phase eight beat, produce the stepper motor drive control signal by microprocessor, be input to stepper motor driving circuit, produce stepper motor by stepper motor driving circuit and drive signal; Stepper motor driving circuit adopts the DL-023MDC stepper motor driver; Controlled by timer 0 interval time in step in the microprocessor, and the P1.6 of microprocessor, P1.7 port are as stepper motor drive control signal output port.For filter wheel control, its stepper motor operation step number and filter wheel scrambler code value variation relation can be drawn by formula (1), and filter wheel rotational angle and filter wheel scrambler code value variation relation can be drawn by formula (2); For focusing control, its stepper motor operation step number and focusing encoder code value variation relation can be drawn by formula (3), and focus adjusting mechanism displacement and focusing encoder code value variation relation can be drawn by formula (4).
Formula is as follows:
N1=K1×|C1－C2|÷M1 （1）
In the formula, N1 is filter wheel stepper motor operation step number; C1 is the current code value of filter wheel scrambler; C2 is filter wheel scrambler target code value, and M1 is filter wheel stepper motor and scrambler rotating ratio; K1 is conversion coefficient.
Δθ1=K2×M2×ΔC1 （2）
In the formula, Δ θ 1 is filter wheel rotational angle variable quantity; M2 is filter wheel and scrambler rotating ratio; Δ C1 is filter wheel scrambler code value variable quantity; K2 is conversion coefficient.
N2=K3×|C3－C4|÷M3 （3）
In the formula, N2 is focusing stepper motor operation step number; C3 is the current code value of focusing encoder; C4 is focusing encoder target code value, and M3 is focusing stepper motor and scrambler rotating ratio; K3 is conversion coefficient.
ΔL=K4×sinθ2×ΔC2 （4）
In the formula, Δ L is focal plane displacement variable quantity; θ 2 is focus adjusting mechanism focal plane inclination angle; Δ C2 is focusing encoder code value variable quantity; K4 is conversion coefficient.
3) system is under online mode, and the simultaneous communications for the communication unit in realization and host computer and two topworkies has adopted UART serial port extended chip, thereby made microprocessor carry out independently communication of while with three serial ports; The microprocessor baud rate is 38400bps, and the substring mouth is 9600bps; Microprocessor port P3.0 is the serial communication receiving port, and port P3.1 is the serial communication transmit port, and port P1.4 is serial communication address 0, and port P1.5 is serial communication address 1; Described serial communication address is that microprocessor is used for identifying and the address of locating 3 sub-serial ports; Microprocessor sends data at every turn and sends first assigned address to determine substring mouth position, and the first reading address of each receive data is to determine substring mouth position, and microprocessor Serial data receiving process flow diagram as shown in Figure 5.
4) the every 200ms of the communication unit of two topworkies sends first encoding device code value to microprocessor, and immediate updating display data after the code value information is received by system, and the update system duty shows information, and the employed scrambler of system is 20 scramblers.
5) system carries out closed-loop control according to filter wheel and focusing control command and parameter to two topworkies, realizes the filter wheel control deviation less than 0.02 °, and the focusing control deviation is less than 0.02mm.
6) as shown in Figure 6, described filter wheel closed-loop control flow process is as follows:
A. filter wheel is regulated beginning;
B. read mode change-over switch state, online mode redirect c, offline mode redirect d;
C. start serial communication and interrupt, wait for serial intermit, serial intermit judges whether control command is effective after arriving, invalid redirect b, effectively analysis and Control order, redirect e;
D. close serial communication and interrupt, read the control key information, invalid redirect b, effectively analysis and Control order, redirect e;
E. read filter wheel scrambler code value, according to control command calculated step motor operation step number and direction, according to the rotating speed order control drive control signal cycle;
F. start timer, stepper motor steps is subtracted one;
G. judging whether number of motor steps is zero, is zero redirect h, non-vanishing redirect f;
H. whether error in judgement meets the demands, and satisfies redirect b, otherwise redirect e;
I. judge whether the recurrent state position is effective, effective redirect j, invalid redirect b;
J. judging whether it is last tablet filter, is redirect b then, otherwise redirect e.
(7) as shown in Figure 7, described focusing closed-loop control flow process is as follows:
A. beginning is regulated in focusing;
B. read mode change-over switch state, online mode redirect c, offline mode redirect d;
C. start serial communication and interrupt, wait for serial intermit, serial intermit judges whether control command is effective after arriving, invalid redirect b, effectively analysis and Control order, redirect e;
D. close serial communication and interrupt, read the control key information, invalid redirect b, effectively analysis and Control order, redirect e;
E. read filter wheel scrambler code value, according to control command calculated step motor operation step number and direction, according to the rotating speed order control drive control signal cycle;
F. start timer, stepper motor steps is subtracted one;
G. judging whether number of motor steps is zero, is zero redirect h, non-vanishing redirect f;
H. whether error in judgement meets the demands, and satisfies redirect b, otherwise redirect e.
Embodiment one
Under the online mode, use PC control unit carries out filter wheel and regulates control, clicks spectral coverage 1 button on the control interface, system's fill order, and after adjusting finished, LCDs showed that current code value is 30002H, current spectral coverage is spectral coverage 1; Click spectral coverage 2 buttons on the control interface, system's fill order, after adjusting finished, LCDs showed that current code value is 40003H, current spectral coverage is spectral coverage 2.
Embodiment two
Under the offline mode, use the switch of system control switch and push-button unit and press key control system work, press filter wheel control cruise switch, system's fill order, at first forward spectral coverage 1 to, stop 4s, LCDs shows that current code value is 30001H, current spectral coverage is spectral coverage 1, then forward spectral coverage 2 to, stop 4s, LCDs shows that current code value is 3FFFDH, current spectral coverage is spectral coverage 2, carries out successively until spectral coverage n stops afterwards.
Embodiment three
Under the online mode, use the control of focusing of PC control unit, in the target code value of control interface, input 50000H, click and send button, system's fill order, after the focusing end, LCDs display-object code value is 50000H, current code value is 4FFFFH.
Embodiment four
Under the offline mode, use the switch of system control switch and push-button unit and press key control system work, press focusing control cruise switch, system's fill order, focus adjusting mechanism moves reciprocatingly, and current code value changes between the 500C7H at 4FFFFH.
By embodiment one and embodiment two as can be known, spectral coverage 1 place's error code value is 2 and 1, spectral coverage 2 place's error code values are 3 and 2, according to formula (2), calculating spectral coverage 1 place's filter wheel rotational angle error is 0.006 ° and 0.003 °, spectral coverage 1 place's filter wheel rotational angle error is 0.009 ° and 0.006 °, and filter wheel is regulated departure and met the demands.
By embodiment three and embodiment four as can be known, closed loop error of focusing code value is 1, and by formula (4), calculating the focusing departure is 1.078um, and closed loop focusing departure meets the demands.
Claims (5)
1. a space camera filter wheel is controlled liquid crystal display systems with focusing, it is characterized in that, this system comprises PC control unit, filter wheel and focusing control module, focusing topworks and filter wheel adjustment actuating mechanism;
Described filter wheel links to each other with the PC control unit with the focusing control module, when system's on-line working, carry out both-way communication, filter wheel provides system status parameters with the focusing control module to the host computer control module, and the PC control unit sends control command and data parameters to filter wheel and focusing control module;
Described filter wheel links to each other with the filter wheel adjustment actuating mechanism with the focusing control module, filter wheel sends the operation of stepping motor drive signal control topworks with the focusing control module to the filter wheel adjustment actuating mechanism, and the filter wheel adjustment actuating mechanism provides the code value signal of filter wheel scrambler to filter wheel and focusing control module;
Described filter wheel links to each other with focusing topworks with the focusing control module, filter wheel sends the operation of stepping motor drive signal control topworks with the focusing control module to focusing topworks, and focusing topworks provides the code value signal of focusing encoder to filter wheel and focusing control module.
2. a kind of space camera filter wheel as claimed in claim 1 is controlled liquid crystal display systems with focusing, it is characterized in that, described filter wheel comprises microprocessor, system control switch and push-button unit, liquid crystal display, focusing motor-drive circuit and filter wheel motor-drive circuit with the focusing control module; System control switch and push-button unit link to each other with microprocessor, and system control switch and push-button unit provide switch and push button signalling to microprocessor, are used for the control command under switched system mode of operation and the generation offline mode; Microprocessor links to each other with liquid crystal display, and the working status parameter of system is provided to liquid crystal display, is used for showing in real time; Microprocessor links to each other with the filter wheel motor-drive circuit, provides the drive and control of electric machine signal to the filter wheel motor-drive circuit, and produces actual motor drive signal by the filter wheel motor-drive circuit; Microprocessor links to each other with the focusing motor-drive circuit, provides the drive and control of electric machine signal to the focusing motor-drive circuit, and produces actual motor drive signal by the focusing motor-drive circuit.
3. a kind of space camera filter wheel as claimed in claim 1 and focusing control liquid crystal display systems is characterized in that, described filter wheel adjustment actuating mechanism comprises filter wheel stepper motor, filter wheel governor motion and filter wheel scrambler communication unit; Filter wheel stepper motor and filter wheel link to each other with filter wheel motor-drive circuit in the focusing control module, and the filter wheel motor-drive circuit provides motor drive signal to the filter wheel stepper motor, start and stop, speed and the rotation direction of control filter wheel stepper motor; The filter wheel governor motion links to each other with filter wheel stepper motor, filter wheel scrambler communication unit respectively, and the filter wheel governor motion is by filter wheel stepper motor drive work, and the filter wheel governor motion drives filter wheel scrambler communication unit and rotates; Filter wheel scrambler communication unit and filter wheel link to each other with microprocessor in the focusing control module, and filter wheel scrambler communication unit regularly sends the current code value of filter wheel scrambler to microprocessor.
4. a kind of space camera filter wheel as claimed in claim 1 and focusing control liquid crystal display systems is characterized in that, described focusing topworks comprises focus stepper motor, focus adjusting mechanism and focusing encoder communication unit; Focusing stepper motor and filter wheel link to each other with focusing motor-drive circuit in the focusing control module, and the focusing motor-drive circuit provides motor drive signal to the focusing stepper motor, control focus start and stop, speed and the rotation direction of stepper motor; Focus adjusting mechanism links to each other with focusing stepper motor, focusing encoder communication unit respectively, and focus adjusting mechanism is by focusing stepper motor drive work, and focus adjusting mechanism drives the focusing encoder communication unit and rotates; Focusing encoder communication unit and filter wheel link to each other with microprocessor in the focusing control module, and the focusing encoder communication unit regularly sends the current code value of focusing encoder to microprocessor.
5. a kind of space camera filter wheel as claimed in claim 1 is controlled liquid crystal display systems with focusing, it is characterized in that, described PC control unit comprises PC, PC and filter wheel link to each other with microprocessor in the focusing control module, PC provides control command and data parameters to microprocessor, and shows the system status parameters that is transmitted by microprocessor in real time.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110941212A (en) * | 2019-11-06 | 2020-03-31 | 上海航天控制技术研究所 | Control device and control method for high-speed rotating light filtering wheel in compact space structure |
| CN115297250A (en) * | 2022-09-30 | 2022-11-04 | 北京市农林科学院信息技术研究中心 | Image acquisition device, method, electronic device and storage medium |
| CN117848679A (en) * | 2024-01-09 | 2024-04-09 | 北京控制工程研究所 | Defocus detection device and method of microscopic imaging system |
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2013
- 2013-06-24 CN CN 201310254031 patent/CN103308285A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110941212A (en) * | 2019-11-06 | 2020-03-31 | 上海航天控制技术研究所 | Control device and control method for high-speed rotating light filtering wheel in compact space structure |
| CN115297250A (en) * | 2022-09-30 | 2022-11-04 | 北京市农林科学院信息技术研究中心 | Image acquisition device, method, electronic device and storage medium |
| CN117848679A (en) * | 2024-01-09 | 2024-04-09 | 北京控制工程研究所 | Defocus detection device and method of microscopic imaging system |
| CN117848679B (en) * | 2024-01-09 | 2024-10-01 | 北京控制工程研究所 | Defocus detection device and method of microscopic imaging system |
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Application publication date: 20130918 |