CN109324560A - A kind of control method of liquid crystal driver, scanning control system and the system - Google Patents
A kind of control method of liquid crystal driver, scanning control system and the system Download PDFInfo
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- CN109324560A CN109324560A CN201811487368.XA CN201811487368A CN109324560A CN 109324560 A CN109324560 A CN 109324560A CN 201811487368 A CN201811487368 A CN 201811487368A CN 109324560 A CN109324560 A CN 109324560A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25314—Modular structure, modules
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- Automation & Control Theory (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses the control method of a kind of liquid crystal driver, scanning control system and the system, which controls multiple liquid crystal wave plates by FPGA module and DAC module Multi-path synchronous；FPGA module includes fpga chip, and DAC driving circuit is provided on fpga chip, and fpga chip realizes the parallel control to DAC driving circuit using Verilog language；DAC driving circuit drives DAC module；DAC module uses 8 tunnel, 24 bit digital analog-converted chip；DAC module realizes the multiple liquid crystal wave plates of synchronously control by the voltage at synchronously control multiple liquid crystal wave plates both ends.The liquid crystal driver can multiple liquid crystal wave plates in high-precise synchronization control liquid crystal type optical filter, to have using the wavestrip scanning control system of the liquid crystal driver, accuracy is high, stability is high, fast response time and advantage at low cost.
Description
Technical field
The present invention relates to astronomical observation apparatus fields more particularly to a kind of liquid crystal driver, liquid crystal type optical filter wavestrip to sweep
Retouch control system and the control method of the system.
Background technique
Currently, liquid crystal is chiefly used in display device.With the development of liquid crystal technology, using liquid crystal as the phase of transmission-polarizing light
Delayer is gradually applied to various fields, such as remote sensing polarization image measurement, Laser Modulation.The birefringent optical filtering of tunable narrow-band
Device is a kind of important instrument in solar magnetic field scope.It is tunable to refer to changing optical filter by adjusting optical filter
Can transmitted light wavelength.Narrowband refers to that optical filter penetrates band bandwidth less than 0.1 angstrom.The birefringence of liquid crystal can exist according to load
The voltage value size at its both ends and change, be used for can change in optical filter through wavestrip.Existing tunable narrow-band is double
Refractive light filter is remarkably improved the temporal resolution of sun observation according to liquid crystal wave plate.Optical filtering for solar magnetic field observation
Device is needed using 5 to 7 liquid crystal wave plates.Needed when changing through wavestrip to the voltage at multiple liquid crystal wave plates both ends of optical filter into
Row synchronizes accurate control.However, the control channel number of the liquid crystal driver of existing optical filter is few, can not achieve to multi-disc liquid crystal wave
Piece carries out high-precise synchronization control.Also, available liquid crystal driver accuracy is low, stability is low, response speed is slow and at high cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide the controls of a kind of liquid crystal driver, scanning control system and the system
Method.The liquid crystal driver can high-precise synchronization control liquid crystal type optical filter in multiple liquid crystal wave plates, thus using the liquid crystal
The scanning control system of driver have the function of can high-precise synchronization control liquid crystal type optical filter in multiple liquid crystal wave plates, and
System accuracies height, stability height, fast response time and advantage at low cost, similarly, the control of the scanning control system
Method is conducive to improve the accuracy of the system, stability and response speed, and can be more in synchronously control liquid crystal type optical filter
A liquid crystal wave plate.
In order to solve the above-mentioned technical problem, a kind of liquid crystal driver of the invention passes through field programmable gate array module
(FPGA module, Field Programmable Gate Array module) and digital simulation conversion module (DAC module,
Digital to Analog Converter module) the multiple liquid crystal wave plates of Multi-path synchronous control；FPGA module includes that scene can compile
Journey gate array chip (fpga chip, Field Programmable Gate Array) is provided with digital simulation on fpga chip
Transducer drive circuits (DAC driving circuit, Digital to Analog Converter driving circuit), fpga chip use
Verilog hardware description language (Verilog language) realizes the parallel control to DAC driving circuit；The driving of DAC driving circuit
DAC module；DAC module uses 8 tunnel, 24 bit digital analog-converted chip；DAC module passes through the multiple liquid crystal wave plates two of synchronously control
The voltage at end realizes the multiple liquid crystal wave plates of synchronously control.
Further, liquid crystal driver includes numerical portion and analog portion；The numerical portion of liquid crystal driver includes logical
Believe module, FPGA module and input/output module (I/O module, Input Output module)；Wherein, communication module, including
RS422 interface；FPGA module, including fpga chip, fpga chip are control chip；DAC driving electricity is provided on fpga chip
(the soft core of NIOS II, Netware Input Output Subsystem II are soft for road and the soft core of netware input and output subsystem II
Core)；I/O module is exported for receiving the input from FPGA module to the analog portion of liquid crystal driver；Liquid crystal driver
Analog portion includes DAC module, amplification circuit module and filter module；Wherein, DAC module comes from liquid crystal drive for receiving
The digital signal input of I/O module in device numerical portion；It converts digital signals into square wave analog signal and exports to amplifying circuit
Module；Amplification circuit module, for amplifying the analog signal from DAC module and extremely filtering amplified analog signal output
Module；Filter module reduces overshoot width for the amplified input voltage from amplification circuit module to be filtered
Value and reduction ripple, and signal is input to liquid crystal wave plate by treated.
Further, the analog portion of liquid crystal driver include positive and negative 15V power module of voltage regulation, 5V power module of voltage regulation and
2.5V power module of voltage regulation, wherein positive and negative 15V power module of voltage regulation provides electric energy to the amplification circuit module；5V pressure stabilizing electricity
Source module provides electric energy to the DAC module；2.5V power module of voltage regulation is mentioned to the amplification circuit module and the DAC module
Supply reference voltage.
Further, the signal of FPGA module and DAC module transmission uses optical coupling isolation circuit.
Further, amplification circuit module uses two-stage manifold type amplifying circuit.
Further, it is counted between the soft core of NIOS II and DAC driving circuit using Avalon bus (AVALON bus)
According to transmission, the storage and friendship of data are realized in data transmission using the mode of first in, first out (FIFO, First In First Out)
Mutually.
Further, DAC driving circuit uses high precision electro power-switching circuit.
Further, the soft core of NIOS II is electrically connected with EPCS, and the soft core of NIOS II is electrically connected with SDRAM.
A kind of liquid crystal driver of the invention has the advantages that compared with prior art.
1, the technical program is controlled due to using a kind of liquid crystal driver by FPGA module and DAC module Multi-path synchronous
Multiple liquid crystal wave plates；FPGA module includes fpga chip, and DAC driving circuit is provided on fpga chip, and fpga chip uses
Verilog language realizes the parallel control to DAC driving circuit；DAC driving circuit drives DAC module；DAC module uses 8 tunnels
24 bit digital analog-converted chips；DAC module realizes that synchronously control is more by the voltage at synchronously control multiple liquid crystal wave plates both ends
The technological means of a liquid crystal wave plate, so, the liquid crystal driver can high-precise synchronization control liquid crystal type optical filter in multiple liquid
Brilliant wave plate, wherein 8 tunnel, 24 bit digital analog-converted chip, it is controllable to increase driver while improving voltage output resolution ratio
The port number of liquid crystal wave plate.
2, the technical program includes numerical portion and analog portion due to using liquid crystal driver；The number of liquid crystal driver
Character segment includes communication module, FPGA module and I/O module；Wherein, communication module, including RS422 interface；FPGA module, including
Fpga chip, fpga chip are control chip；DAC driving circuit and the soft core of NIOS II are provided on fpga chip；I/O module,
For receiving the input from FPGA module, export to the analog portion of liquid crystal driver；The simulation part subpackage of liquid crystal driver
Include DAC module, amplification circuit module and filter module；Wherein, DAC module comes from liquid crystal driver numerical portion for receiving
The digital signal of middle I/O module inputs；It converts digital signals into square wave analog signal and exports to amplification circuit module；Amplification
Circuit module, for amplifying the analog signal from DAC module and by amplified analog signal output to filter module；Filtering
Module reduces overshoot amplitude and reduction for the amplified input voltage from amplification circuit module to be filtered
Ripple, and by the technological means of treated signal is input to liquid crystal wave plate, so the technological means is that liquid crystal driver can be high
Multiple liquid crystal wave plates in accurate synchronization control liquid crystal type optical filter provide hardware foundation.
3, the technical program is due to including positive and negative 15V power module of voltage regulation, 5V using the analog portion of liquid crystal driver
Power module of voltage regulation and 2.5V power module of voltage regulation, wherein positive and negative 15V power module of voltage regulation is provided to the amplification circuit module
Electric energy；5V power module of voltage regulation provides electric energy to the DAC module；2.5V power module of voltage regulation to the amplification circuit module and
The DAC module provides the technological means of reference voltage, improves the stability of the liquid crystal driver.
4, the technical program uses the skill of optical coupling isolation circuit due to using the signal transmission of FPGA module and DAC module
Art means achieve the purpose that the stability for improving voltage output so efficiently reducing interference of the digital signal to analog signal.
5, the technical program uses the technological means of two-stage manifold type amplifying circuit, institute due to using amplification circuit module
To effectively improve the stability of voltage output.
6, the technical program uses and carries out data using AVALON bus between the soft core of NIOS II and DAC driving circuit
Transmission, data are transmitted realizes the storage and interaction of data by the way of FIFO, thus AVALON bus as a kind of agreement compared with
The soft core of NIOS II and extraneous progress data exchange are assisted for simple on-chip bus, is conducive to the high efficiency of transmission of signal, and simplify
The logical connection of timing behavior and peripheral hardware and chip.
7, the technical program uses the technological means of high precision electro power-switching circuit, institute due to using DAC driving circuit
It is exported with being conducive to stablizing for voltage.
8, the technical program is electrically connected due to using the soft core of NIOS II with EPCS, and the soft core of NIOS II and
The technological means of SDRAM electrical connection, so providing stable, reliable and big capacity information storage system for liquid crystal driver.
In order to solve the above-mentioned technical problem, the invention also provides a kind of scanning control system, the scanning control system packets
Liquid crystal driver, control device and liquid crystal type optical filter as elucidated before are included；The numerical portion of liquid crystal driver and control
Device electrical connection processed；The analog portion of liquid crystal driver is electrically connected with liquid crystal type optical filter；Liquid crystal type optical filter is internally provided with
Multiple liquid crystal wave plates.
Scanning control system of the invention has the advantages that compared with prior art.
For the technical program due to using a kind of scanning control system, which includes as elucidated before
Liquid crystal driver, control device and liquid crystal type optical filter；The numerical portion of liquid crystal driver is electrically connected with control device；Liquid crystal
The analog portion of driver is electrically connected with liquid crystal type optical filter；Liquid crystal type optical filter is internally provided with the technology of multiple liquid crystal wave plates
Means, thus the scanning control system can high-precise synchronization control liquid crystal type optical filter in multiple liquid crystal wave plates, and have essence
Exactness height, stability height, fast response time and advantage at low cost.
In order to solve the above-mentioned technical problem, the invention also provides a kind of control methods of scanning control system, by upper
It states liquid crystal driver and control is synchronized to the liquid crystal wave plate in the liquid crystal type optical filter in above-mentioned scanning control system.
The control method of scanning control system of the invention has the advantages that compared with prior art.
A kind of control method of the technical program due to using scanning control system, this method pass through liquid as described above
Brilliant driver synchronizes the skill of control to the liquid crystal wave plate in the liquid crystal type optical filter in scanning control system as described above
Art means；The control method is by the user interface module of control device to multiple liquid crystal waves inside liquid crystal type optical filter
Piece synchronizes control or individually controls any liquid crystal wave plate therein, so the control method is that experimenter applies the scanning control
System processed is provided convenience.
Detailed description of the invention
A kind of liquid crystal driver of the invention and its scanning control system are made with reference to the accompanying drawings and detailed description
It is described in further detail.
Fig. 1 is the hardware connection diagram of scanning control system of the present invention.
Fig. 2 is the flow diagram of scanning control system control method of the present invention.
The reference numerals are as follows.
1, liquid crystal driver；
1-1, numerical portion；
1-1-1, FPGA module；
The soft core of 1-1-1-1, NIOS II；
1-1-1-2, DAC driving circuit；
1-1-2, communication module；
1-1-3,EPCS；
1-1-4,SDRAM；
1-1-5, I/O module；
1-1-6, power module；
1-2, analog portion；
1-2-1, DAC module；
1-2-2, amplification circuit module；
1-2-3, filter module；
1-2-4,2.5V power module of voltage regulation；
1-2-5,5V power module of voltage regulation；
1-2-6, positive and negative 15V power module of voltage regulation；
1-2-7, voltage changing module；
1-3, IO connector；
1-4, power interface；
2, control device；
3, liquid crystal type optical filter；
4,220V turns 15V power supply.
Specific embodiment
As depicted in figs. 1 and 2, the present invention provides a kind of liquid crystal driver and its scanning control system.The liquid crystal driver 1
Multiple liquid crystal wave plates are controlled by FPGA module 1-1-1 and DAC module 1-2-1 Multi-path synchronous；FPGA module 1-1-1 includes FPGA
Chip, DAC driving circuit 1-1-1-2 is provided on fpga chip, and fpga chip is realized using Verilog language and driven to DAC
The parallel control of circuit 1-1-1-2；DAC driving circuit 1-1-1-2 drives DAC module 1-2-1；DAC module 1-2-1 uses 8 tunnels
24 bit digital analog-converted chips；DAC module 1-2-1 realizes synchronous control by the voltage at synchronously control multiple liquid crystal wave plates both ends
Make multiple liquid crystal wave plates.
The internal circuit of fpga chip can be directly changed by Verilog language, to realize to the DAC on fpga chip
Driving circuit 1-1-1-2 is controlled, and effectively improves DAC driving circuit 1-1-1-2 to digital in DAC module 1-2-1
The control speed of analog-converted chip, shortens the response time.8 tunnel, 24 bit digital analog-converted chip effectively increases liquid crystal drive
For controlling the number of channels of liquid crystal wave plate on dynamic device 1, so that the liquid crystal driver 1 can control simultaneously in liquid crystal type optical filter 3
5 to 7 liquid crystal wave plates so that liquid crystal type optical filter 3 can reach the technical standard being observed to solar magnetic field.
As shown in Figure 1, the liquid crystal driver 1 of present embodiment includes numerical portion 1-1 and analog portion 1-2；Liquid crystal drives
The numerical portion 1-1 of dynamic device 1 includes communication module 1-1-2, FPGA module 1-1-1 and I/O module 1-1-5；Wherein, communication module
1-1-2, including RS422 interface；FPGA module 1-1-1, including fpga chip, fpga chip are control chip；On fpga chip
It is provided with the soft core 1-1-1-1 of DAC driving circuit 1-1-1-2 and NIOS II；I/O module 1-1-5 comes from FPGA module for receiving
The input of 1-1-1 is exported to the analog portion 1-2 of liquid crystal driver 1；The analog portion 1-2 of liquid crystal driver 1 includes DAC mould
Block 1-2-1, amplification circuit module 1-2-2 and filter module 1-2-3；Wherein, DAC module 1-2-1 drives for receiving from liquid crystal
The digital signal input of I/O module 1-1-5 in dynamic 1 numerical portion 1-1 of device；Convert digital signals into square wave analog signal and defeated
Out to amplification circuit module 1-2-2；Amplification circuit module 1-2-2, for amplifying the analog signal from DAC module 1-2-1 simultaneously
By amplified analog signal output to filter module 1-2-3；Filter module 1-2-3, for amplification circuit module 1- will to be come from
The amplified input voltage of 2-2 is filtered, and is reduced overshoot amplitude and is reduced ripple, and signal inputs by treated
To liquid crystal wave plate.
The soft core 1-1-1-1 of NIOS II is the programmable soft-core processor of second generation on piece that Altera Corp releases.
Although the bottom of the soft core 1-1-1-1 of NIOS II is Verilog language, but C language can directly develop the soft core 1- of the NIOS II
1-1-1 realizes writing for related algorithm and communication-related functions using C language, can reduce the complexity of pure hardware programming, mention
High working efficiency.Voltage square wave signal generates in DAC module 1-2-1, amplifies in amplifying circuit 1-2-2, passes through filter
Wave module 1-2-3 liquidates amplitude and ripple is reduced, and by input and output connector, (IO connector, Input Output are connect
Plug-in unit) 1-3, it loads at the both ends of each liquid crystal wave plate, the birefringence of each liquid crystal wave plate is regulated and controled.
As shown in Figure 1, the analog portion 1-2 of the liquid crystal driver 1 of present embodiment includes positive and negative 15V power module of voltage regulation
1-2-6,5V power module of voltage regulation 1-2-5 and 2.5V power module of voltage regulation 1-2-4, wherein positive and negative 15V power module of voltage regulation 1-2-
6 provide electric energy to the amplification circuit module 1-2-2；5V power module of voltage regulation 1-2-5 provides electricity to the DAC module 1-2-1
Energy；2.5V power module of voltage regulation 1-2-4 is provided to the amplification circuit module 1-2-2 and DAC module 1-2-1 with reference to electricity
Pressure.
Positive and negative 15V power module of voltage regulation 1-2-6,5V power module of voltage regulation 1-2-5 and 2.5V power module of voltage regulation 1-2-4's
Using, effectively improve load each liquid crystal wave plate both ends voltage stability, thus before not influencing accuracy
Put the stability for improving liquid crystal type optical filter 3.It is logical that positive and negative 15V power module of voltage regulation 1-2-6 and 220V turns 15V power supply 1-4
The power interface 1-4 for crossing liquid crystal driver 1 is connected.The power supply of 5V power module of voltage regulation 1-2-5 comes from positive and negative 15V regulated power supply
Module 1-2-6,5V power module of voltage regulation 1-2-5 and positive and negative 15V power module of voltage regulation 1-2-6 is mutual by voltage changing module 1-2-7
Electrical connection, wherein voltage changing module 1-2-7 is converted for voltage.The power supply of FPGA module 1-1-1 is steady by the 5V of analog portion 1-2
Piezoelectricity source module 1-2-5 is provided by the power module 1-1-6 of numerical portion 1-1.
The signal transmission of the FPGA module 1-1-1 and DAC module 1-2-1 of present embodiment use optical coupling isolation circuit.Light
Coupling isolation circuit efficiently reduces interference of the digital signal to analog signal, also reaches the mesh for improving the stability of voltage output
's.
The amplification circuit module 1-2-2 of present embodiment uses two-stage manifold type amplifying circuit.Two-stage manifold type amplification electricity
Road can remove DC component, reduce square-wave signal bias voltage, achieve the purpose that improve output voltage stabilization degree, to improve
The stability of liquid crystal type optical filter 3.
AVALON bus is used between the NIOS II of present embodiment soft core 1-1-1-1 and DAC driving circuit 1-1-1-2
Carry out data transmission, data transmit the storage and interaction that data are realized by the way of FIFO.C language may be implemented in AVALON bus
It makes peace the interaction of Verilog language, reduces the complexity of pure hardware programming, improve working efficiency.
The DAC driving circuit 1-1-1-2 of present embodiment uses high precision electro power-switching circuit.High-precision power conversion electricity
Road exports with being conducive to voltage stabilization, to improve the stability and accuracy of liquid crystal type optical filter 3.
The NIOS II of present embodiment is soft, and core 1-1-1-1 is electrically connected with EPCS1-1-3, and the soft core 1-1- of the NIOS II
1-1 is electrically connected with SDRAM1-1-4.EPCS1-1-3 is used to store the configuration information of FGPA, and SDRAM1-1-4 is in FPGA
Expansion is played the role of in portion's storage.EPCS1-1-3 and SDRAM1-1-4 provided for liquid crystal driver stablize, reliable and capacity it is big
Information storage system.
A kind of scanning control system of present embodiment, the scanning control system include liquid crystal drive as elucidated before
Device 1, control device 2 and liquid crystal type optical filter 3；The numerical portion 1-1 of liquid crystal driver 1 is electrically connected with control device 2；Liquid crystal
The analog portion 1-2 of driver 1 is electrically connected with liquid crystal type optical filter 3；Liquid crystal type optical filter 3 is internally provided with multiple liquid crystal waves
Piece.
Laboratory technician is interacted by the realization of control device 2 with liquid crystal driver 1, and high-precise synchronization control liquid crystal type filter is carried out
Multiple liquid crystal wave plates inside light device 3.The scanning control system includes the side of interaction of control device 2 with liquid crystal driver 1 simultaneously
Method realizes the control of the visualization to multiple liquid crystal wave plates inside liquid crystal type optical filter 3.Preferably, control device 2 is to calculate
Machine terminal；Terminal includes user interface module.Laboratory technician filters to liquid crystal type by user interface module
The real-time synchronization adjustable high-precision of multiple liquid crystal wave plates inside device 3 controls.
As depicted in figs. 1 and 2, a kind of control method of scanning control system of present embodiment, the control method pass through
Above-mentioned liquid crystal driver 1 synchronizes control to the liquid crystal wave plate in the liquid crystal type optical filter 3 in above-mentioned scanning control system.It should
Input of the control method by the voltage output channel control module of the user interface module of control device 2 to liquid crystal wave plate
Voltage is controlled.The control process is to control first in the voltage output channel of the user interface module of control device 2
Module selects at least one voltage output channel as control object；Then the voltage being electrically connected with each voltage output channel is defeated
Channel control module is issued to selected voltage output channel and is instructed out；Then with the one-to-one voltage output of liquid crystal wave plate
The voltage output channel selected in channel adjusts the voltage input of corresponding liquid crystal wave plate；To realize through control dress
2 user interface module is set to control the input voltage of the liquid crystal wave plate in liquid crystal type optical filter 3.Voltage output is logical
Road control module is exported by serial ports and is electrically connected with liquid crystal driver 1.The function of serial ports output is by user interface module
The received control instruction of voltage output channel control module institute be communicated to liquid crystal driver 1.
Embodiment one
As shown in Fig. 2, user controls multiple liquid crystal in liquid crystal type optical filter by the user interface of terminal
When wave plate both end voltage, beginning icon is first clicked on, scanning control system enters initial phase, is then attempt to establish communication link
It connects.If communication connection cannot be established, display screen shows connection setup failure error information；If foundation communicates successfully, simultaneously
Start the cycle over detection liquid crystal wave plate on-load voltage numerical value and user interface capabilities control instruction identification.
In cycle detection liquid crystal wave plate on-load voltage numerical value, user interface can show voltage value, after the completion of display, meeting
Whether inquiry user issues end program instruction, the bolt down procedure if query result is "Yes", if "No" circulatory monitoring liquid
Brilliant on-load voltage numerical value is simultaneously shown.
After entering user interface capabilities control instruction identification, it can inquire whether user issues the adjusting of voltage magnitude increment type
Instruction, the regulating command of voltage increment formula and/or voltage magnitude store instruction.Enter corresponding voltage if query result is "Yes"
Amplitude increment type adjustment module, voltage increment formula adjustment module and/or voltage magnitude memory module；Then continue to look into if "No"
It askes.It completes voltage magnitude increment type to adjust with after the adjusting of voltage increment formula, sequentially enters the control of voltage output channel, voltage output
Parameter regulation and voltage output amplitude are adjusted, and are exported by serial ports to liquid crystal wave plate.Wherein, voltage output channel control can pass through
The liquid crystal wave plate that selection voltage output channel selecting needs to control, voltage output channel and liquid crystal wave plate correspond.Then can
Whether inquiry user terminates program, the bolt down procedure if query result is "Yes"；User circle is returned to if query result is "No"
Face functionality controls instruction identification interface.Similarly, after completing voltage magnitude storage, data storage is carried out, after the completion of data storage,
Then it can inquire whether user terminates program, the bolt down procedure if query result is "Yes"；It is returned to if query result is "No"
User interface capabilities control instruction identification interface.
Claims (10)
1. a kind of liquid crystal driver, which is characterized in that the liquid crystal driver (1) passes through field programmable gate array module (1-
1-1) and digital simulation conversion module (1-2-1) Multi-path synchronous controls multiple liquid crystal wave plates；The field programmable gate array
Module (1-1-1) includes field programmable gate array chip, is provided with digital simulation on the field programmable gate array chip
Transducer drive circuits (1-1-1-2), the field programmable gate array chip use the realization pair of Verilog hardware description language
The parallel control of digital analog converter driving circuit (1-1-1-2)；The digital analog converter driving circuit (1-1-1-2)
Drive the digital analog converter module (1-2-1)；The digital analog converter module (1-2-1) uses 8 tunnel, 24 digit
Type matrix intends conversion chip；The digital analog converter module (1-2-1) passes through the multiple liquid crystal wave plate both ends of synchronously control
Voltage realize the multiple liquid crystal wave plates of synchronously control.
2. a kind of liquid crystal driver according to claim 1, which is characterized in that the liquid crystal driver (1) includes number
Partially (1-1) and analog portion (1-2)；The numerical portion (1-1) of the liquid crystal driver (1) include communication module (1-1-2),
Field programmable gate array module (1-1-1) and input/output module (1-1-5)；Wherein,
The communication module (1-1-2), including RS422 interface；
The field programmable gate array module (1-1-1), including field programmable gate array chip, the field programmable gate
Array chip is control chip；Digital analog converter driving circuit (1- is provided on the field programmable gate array chip
1-1-2) and the soft core of netware input and output subsystem II (1-1-1-1)；
The input/output module (1-1-5) is defeated from the field programmable gate array module (1-1-1) for receiving
Enter, exports to the analog portion (1-2) of the liquid crystal driver (1)；
The analog portion (1-2) of the liquid crystal driver (1) includes digital analog converter module (1-2-1), amplifying circuit mould
Block (1-2-2) and filter module (1-2-3)；Wherein,
The digital analog converter module (1-2-1) comes from the liquid crystal driver (1) numerical portion (1-1) for receiving
The digital signal of middle input/output module (1-1-5) inputs；The digital signal is converted into square wave analog signal and is exported extremely
Amplification circuit module (1-2-2)；
The amplification circuit module (1-2-2) is believed for amplifying the simulation from the digital analog converter module (1-2-1)
Number and by amplified analog signal output to the filter module (1-2-3)；
The filter module (1-2-3), for will from the amplification circuit module (1-2-2) amplified input voltage into
It goes and is filtered, reduce overshoot amplitude and reduce ripple, and signal is input to liquid crystal wave plate by treated.
3. a kind of liquid crystal driver according to claim 2, it is characterised in that: the simulation part of the liquid crystal driver (1)
Dividing (1-2) includes positive and negative 15V power module of voltage regulation (1-2-6), 5V power module of voltage regulation (1-2-5) and 2.5V power module of voltage regulation
(1-2-4), wherein
Positive and negative 15V power module of voltage regulation (1-2-6) provides electric energy to the amplification circuit module (1-2-2)；
5V power module of voltage regulation (1-2-5) provides electric energy to the digital analog converter module (1-2-1)；
2.5V power module of voltage regulation (1-2-4) is to the amplification circuit module (1-2-2) and the digital analog converter module
(1-2-1) provides reference voltage.
4. a kind of liquid crystal driver according to claim 2, it is characterised in that: the field programmable gate array module
The transmission of (1-1-1) and the signal of the digital analog converter module (1-2-1) uses optical coupling isolation circuit.
5. a kind of liquid crystal driver according to claim 2, it is characterised in that: the amplification circuit module (1-2-2) is adopted
With two-stage manifold type amplifying circuit.
6. a kind of liquid crystal driver according to claim 2, it is characterised in that: the netware input and output subsystem II is soft
Data biography is carried out using Avalon bus between core (1-1-1-1) and the digital analog converter driving circuit (1-1-1-2)
Defeated, the storage and interaction of data are realized in the data transmission by the way of first in, first out.
7. a kind of liquid crystal driver according to claim 2, it is characterised in that: the digital analog converter driving circuit
(1-1-1-2) uses high precision electro power-switching circuit.
8. a kind of liquid crystal driver according to claim 2, it is characterised in that: the netware input and output subsystem II is soft
Core (1-1-1-1) is electrically connected with serial storage (1-1-3), and the soft core of the netware input and output subsystem II (1-1-1-1)
It is electrically connected with Synchronous Dynamic Random Access Memory (1-1-4).
9. a kind of scanning control system, which is characterized in that including liquid crystal driver as claimed in any one of claims 1 to 8
(1), control device (2) and liquid crystal type optical filter (3)；The numerical portion (1-1) of the liquid crystal driver (1) and control
Device (2) electrical connection；The analog portion (1-2) of the liquid crystal driver (1) is electrically connected with the liquid crystal type optical filter (3)
It connects；The liquid crystal type optical filter (3) is internally provided with multiple liquid crystal wave plates.
10. a kind of control method of scanning control system, which is characterized in that pass through the liquid crystal drive as described in claim 1 to 8
Device synchronizes control to the liquid crystal wave plate in the liquid crystal type optical filter (3) in scanning control system as claimed in claim 9.
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| CN201811487368.XA CN109324560B (en) | 2018-12-06 | 2018-12-06 | Liquid crystal driver, scanning control system and control method of system |
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| CN201811487368.XA CN109324560B (en) | 2018-12-06 | 2018-12-06 | Liquid crystal driver, scanning control system and control method of system |
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| CN109324560B (en) | 2020-06-19 |
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