CN111016443B - Dot matrix size controllable type spray head control system and method - Google Patents
Dot matrix size controllable type spray head control system and method Download PDFInfo
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- CN111016443B CN111016443B CN201811173846.XA CN201811173846A CN111016443B CN 111016443 B CN111016443 B CN 111016443B CN 201811173846 A CN201811173846 A CN 201811173846A CN 111016443 B CN111016443 B CN 111016443B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
- B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
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Abstract
The invention provides a system and a method for controlling a sprayer with controllable size of a dot matrix.A control circuit power supply module provides a control power supply for the movement of the sprayer; the MCU control module is communicated with the upper computer, receives and processes the jet printing information and acquires a pulse signal; the FPGA modulation module analyzes the pulse signals to obtain long pulse signals and short pulse signals, and the long pulse signals and the short pulse signals are output to the photoelectric isolation module; the photoelectric isolation module is connected with a driving MOS tube signal; the driving module receives a driving MOS tube signal, controls the on-off of current and drives the spray head to move; the control circuit power supply module is connected with the MCU control module and the FPGA modulation module; the MCU control module, the FPGA modulation module, the photoelectric isolation module and the driving module are connected in sequence. The mode that pulse signal processing and a hardware circuit are combined for use is adopted, a single spray head is controlled by a single pulse, the size and the position of a spray point are accurately controlled, and the working efficiency is effectively improved by using a single chip microcomputer and an FPGA to simultaneously work in a coordinated mode.
Description
Technical Field
The invention relates to the field of jet printing control, in particular to a jet printing control system and a jet printing control method with controllable dot matrix size, and especially relates to a jet printing control system which combines pulse signal processing and a hardware circuit and is used for controlling field jet printing equipment in the steel industry.
Background
The dot matrix jet printing control device for steel products is one of important auxiliary devices on modern steel production lines. The mode that the jet printing control device well controls the jet printing of the nozzle is an important guarantee for the stable work of the whole jet printing equipment, and has extremely high requirements on the accuracy of signal transmission and the stability of jet printing control in the operation of the jet printing equipment.
Patent document CN105564028A discloses a high-speed industrial jet printing control system and method based on the FPGA technology, which is specifically applied to the field of industrial full-printing electronics. The full-automatic printing machine integrates the functions of image processing, jet printing control and motion control, realizes full-automatic printing, replaces the traditional processing mode that the prior jet printing machine system firstly carries out image processing on a PC and then transmits the image to the jet printing machine control system for jet printing, breaks through the speed bottleneck of the traditional jet printing data processing mode, supports the ultra-large number of spray head arrays, and is particularly suitable for single-pass jet printing of the industrial roll-to-roll jet printing process. A spray printing control method is adopted to coordinate a scheduling function submodule to realize the spray printing function, overcome accumulated positioning errors, control flexible acceleration and deceleration movement and ensure the ink droplet ejection state, and the method is simple and provides better spray printing precision. The equipment can be controlled to spray and print at the speed close to the highest theoretical speed, and the production efficiency is greatly improved. However, the above patent documents support an ultra-large number of nozzle arrays, which inevitably results in low accuracy of the inkjet printing, and moreover, on the basis of the FPGA, a large number of module functions such as main control, motion control, data processing, image processing, data reading, and grating positioning are integrated with one processing chip to operate, which results in a large workload of the chip and long time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a system and a method for controlling a spray head with controllable dot matrix size.
The invention provides a dot matrix size controllable spray head control system which comprises a control circuit power supply module, an MCU control module, an FPGA modulation module, a photoelectric isolation module and a driving module, wherein the MCU control module is connected with the drive module; the control circuit power supply module: providing a control power supply for the movement of the spray head; the MCU control module: the system is communicated with an upper computer, receives jet printing information sent by the upper computer, processes the jet printing information, acquires a pulse signal, and outputs the pulse signal to an FPGA modulation module; an FPGA modulation module: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to the photoelectric isolation module; the photoelectric isolation module: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving module; a driving module: receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move; the control circuit power supply module is connected with the MCU control module and the FPGA modulation module; the MCU control module, the FPGA modulation module, the photoelectric isolation module and the driving module are connected in sequence.
Preferably, the control circuit power supply module mainly comprises a first ACDC module, a power indicator, a 3.3V voltage stabilizer, a 1.8V voltage stabilizer, a DCDC module and a first pi-type filter circuit; a first output end of the first ACDC module is connected with a first input end of the power indicator; a second output end of the first ACDC module is connected with a first input end of the first pi-type filter circuit; the first output end of the first pi-type filter circuit is connected with the first input end of the DCDC module; the first output end of the DCDC module is connected with the second input end of the power indicator; and a second output end of the DCDC module is connected with an input end of the 3.3V voltage stabilizer and an input end of the 1.8V voltage stabilizer, and the 3.3V voltage stabilizer is connected with the 1.8V voltage stabilizer in parallel.
Preferably, the MCU control module mainly comprises a single chip microcomputer, a reset chip, a reset switch, an RS232 protocol chip, a UART interface, a first inverter and an input/output hardware interface; the first output end of the singlechip is connected with the input and output hardware interface; the second output end of the singlechip is connected with the reset chip, the reset switch, the RS232 protocol chip and the UART interface; the reset chip is connected with the first phase inverter.
Preferably, the FPGA modulation module mainly comprises an FPGA, a fault indicator, an AD acquisition module and an input/output hardware interface; the first output end of the FPGA is connected with the fault indicator; the second output end of the FPGA is connected with the input end of the AD acquisition module; the FPGA is connected with the input and output hardware interface.
Preferably, the photoelectric isolation module mainly comprises a second ACDC module, a second pi-type filter circuit, a high-speed optical coupler, a second inverter, a relay and an input/output hardware interface; a first output end of the second ACDC module is connected with an input end of the second pi-type filter circuit; the output end of the second pi-type filter circuit is respectively connected with the first input end of the high-speed optocoupler, the first input end of the second inverter and the first input end of the relay; the first output end of the high-speed optocoupler is connected with the second input end of the second phase inverter; the first output end of the second phase inverter is connected with the second input end of the relay; and the second output end of the high-speed optical coupler is connected with the input and output hardware interface.
Preferably, the driving module mainly comprises an MOS transistor, an overvoltage protection device, an overcurrent protection device, an anti-reverse connection device, and an input/output hardware interface; the first input end of the MOS tube is connected with the overvoltage protection device; the second input end of the MOS tube is connected with the overcurrent protection device; the output end of the MOS tube is respectively connected with the reverse connection preventing device and the input and output hardware interface.
Preferably, the spray head comprises a plurality of solenoid valves, the solenoid valves generating an electromagnetic attraction force F, the electromagnetic attraction force F complying with the following formula:
F＝K(IW)2S/l2×9.8×10-8
wherein K represents a constant; i represents the coil current; w represents the number of coil turns; s represents the sectional area of the iron core; l represents an air gap value.
Preferably, the total average power P consumed by said solenoid valveLThe following formula is satisfied:
in the formula IPRepresenting a peak current of a coil of the solenoid valve; r represents a coil copper resistance; t isPIndicating the maximum peak duration is reached; i isSIndicating the maintained current value after the solenoid valve is opened; t isSRepresents the sustain current duration; t isDIndicating the ink ejection cycle duty cycle.
The invention provides a method for controlling a nozzle with controllable size of a dot matrix, which comprises a circuit power supply control step, an MCU control step, an FPGA modulation step, a photoelectric isolation step and a driving step; controlling a circuit power supply: providing a control power supply for the movement of the spray head; MCU control step: communicating with an upper computer, receiving jet printing information sent by the upper computer, processing the jet printing information, acquiring a pulse signal, and outputting the pulse signal to an FPGA (field programmable gate array) modulation step; and (3) FPGA modulation step: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to a photoelectric isolation step; photoelectric isolation: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving step; a driving step: and receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move.
Compared with the prior art, the invention has the following beneficial effects:
1. the mode of combining pulse signal processing and a hardware circuit is adopted, so that a single pulse controls a single spray head, the size and the position of a spray point are accurately controlled, and a single chip microcomputer and an FPGA (field programmable gate array) work cooperatively at the same time, so that the working efficiency is effectively improved;
2. the FPGA is adopted to decompose the pulse signals, the longer pulse is used for opening the electromagnetic valve, and the shorter pulse is used for maintaining the state of the electromagnetic valve, so that the situation that the electromagnetic valve in the nozzle generates a large amount of heat to cause burning is avoided;
3. the strong current and the weak current are isolated by an isolation circuit, so that the good operation of the jet printing control device is guaranteed.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic block diagram of a control mode structure of a jet printing controller;
FIG. 2 is an interface diagram showing a waveform diagram of a pulse signal generated by the single chip microcomputer;
FIG. 3 is an interface diagram showing a waveform diagram of a pulse signal modulated by the FPGA;
fig. 4 is an idealized current waveform in the solenoid coil.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a dot matrix size controllable spray head control system which comprises a control circuit power supply module, an MCU control module, an FPGA modulation module, a photoelectric isolation module and a driving module, wherein the MCU control module is connected with the drive module; the control circuit power supply module: providing a control power supply for the movement of the spray head; the MCU control module: the system is communicated with an upper computer, receives jet printing information sent by the upper computer, processes the jet printing information, acquires a pulse signal, and outputs the pulse signal to an FPGA modulation module; an FPGA modulation module: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to the photoelectric isolation module; the photoelectric isolation module: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving module; a driving module: receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move; the control circuit power supply module is connected with the MCU control module and the FPGA modulation module; the MCU control module, the FPGA modulation module, the photoelectric isolation module and the driving module are connected in sequence.
Specifically, the control circuit power supply module mainly comprises a first ACDC module, a power indicator, a 3.3V voltage stabilizer, a 1.8V voltage stabilizer, a DCDC module and a first pi-type filter circuit; a first output end of the first ACDC module is connected with a first input end of the power indicator; a second output end of the first ACDC module is connected with a first input end of the first pi-type filter circuit; the first output end of the first pi-type filter circuit is connected with the first input end of the DCDC module; the first output end of the DCDC module is connected with the second input end of the power indicator; and a second output end of the DCDC module is connected with an input end of the 3.3V voltage stabilizer and an input end of the 1.8V voltage stabilizer, and the 3.3V voltage stabilizer is connected with the 1.8V voltage stabilizer in parallel.
Specifically, the MCU control module mainly comprises a single chip microcomputer, a reset chip, a reset switch, an RS232 protocol chip, a UART interface, a first phase inverter and an input/output hardware interface; the first output end of the singlechip is connected with the input and output hardware interface; the second output end of the singlechip is connected with the reset chip, the reset switch, the RS232 protocol chip and the UART interface; the reset chip is connected with the first phase inverter.
Specifically, the FPGA modulation module mainly comprises an FPGA, a fault indicator, an AD acquisition module and an input/output hardware interface; the first output end of the FPGA is connected with the fault indicator; the second output end of the FPGA is connected with the input end of the AD acquisition module; the FPGA is connected with the input and output hardware interface.
Specifically, the photoelectric isolation module mainly comprises a second ACDC module, a second pi-type filter circuit, a high-speed optical coupler, a second inverter, a relay and an input/output hardware interface; a first output end of the second ACDC module is connected with an input end of the second pi-type filter circuit; the output end of the second pi-type filter circuit is respectively connected with the first input end of the high-speed optocoupler, the first input end of the second inverter and the first input end of the relay; the first output end of the high-speed optocoupler is connected with the second input end of the second phase inverter; the first output end of the second phase inverter is connected with the second input end of the relay; and the second output end of the high-speed optical coupler is connected with the input and output hardware interface.
Specifically, the driving module mainly comprises an MOS tube, an overvoltage protection device, an overcurrent protection device, an anti-reverse connection device and an input/output hardware interface; the first input end of the MOS tube is connected with the overvoltage protection device; the second input end of the MOS tube is connected with the overcurrent protection device; the output end of the MOS tube is respectively connected with the reverse connection preventing device and the input and output hardware interface.
Specifically, the spray head includes a plurality of solenoid valves that generate an electromagnetic attractive force F that satisfies the following formula:
F＝K(IW)2S/l2×9.8×10-8
wherein K represents a constant; i represents the coil current; w represents the number of coil turns; s represents the sectional area of the iron core; l represents an air gap value.
In particular, the total average power consumed P of said solenoid valveLThe following formula is satisfied:
in the formula IPRepresenting a peak current of a coil of the solenoid valve; r represents a coil copper resistance; t isPIndicating the maximum peak duration is reached; i isSIndicating the maintained current value after the solenoid valve is opened; t isSRepresents the sustain current duration; t isDIndicating the ink ejection cycle duty cycle.
The invention provides a method for controlling a nozzle with controllable size of a dot matrix, which comprises a circuit power supply control step, an MCU control step, an FPGA modulation step, a photoelectric isolation step and a driving step; controlling a circuit power supply: providing a control power supply for the movement of the spray head; MCU control step: communicating with an upper computer, receiving jet printing information sent by the upper computer, processing the jet printing information, acquiring a pulse signal, and outputting the pulse signal to an FPGA (field programmable gate array) modulation step; and (3) FPGA modulation step: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to a photoelectric isolation step; photoelectric isolation: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving step; a driving step: and receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move.
The control system of the nozzle with the controllable size of the dot matrix can be realized through the step flow of the control method of the nozzle with the controllable size of the dot matrix. Those skilled in the art can understand the dot matrix size-controllable showerhead control method as a preferred example of the dot matrix size-controllable showerhead control system.
The invention adopts a mode of combining pulse signal processing and a hardware circuit for use, so that a single pulse controls a single spray head, the size and the position of a spray point are accurately controlled, a singlechip and an FPGA are used for simultaneously working cooperatively, the labor division is clear, and the working efficiency can be effectively improved. The spraying point can be accurately controlled by controlling the switch of a single spray head through a single pulse signal. In this way, this is achieved by programming and peripheral circuitry. Configuration and jet printing data are issued by an upper computer, a single chip program receives the configuration and jet printing data, a dot matrix array is generated by analyzing the jet printing data in the program, the dot matrix array is compared, inquired and extracted in a word stock, and an IO port is controlled to be switched on and off through a timer, so that the purpose of generating pulse signals is achieved. The pulse signal is modulated after entering the FPGA, becomes a pulse signal consisting of a long pulse and a plurality of short pulses, and is added with a photoelectric isolation circuit and a driving circuit, thereby achieving the purpose of accurately controlling the spray head.
The invention relates to a control module for signal processing by combining a singlechip and an FPGA (field programmable gate array), wherein a photoelectric isolation circuit and a driving circuit are used as driving circuits for driving a sprayer. The single chip microcomputer plays a main control role, communicates with an upper computer through a 232 protocol chip and a UART interface, receives and processes jet printing data, jet printing configuration, jet starting, trial jet and termination signals sent by the upper computer, and sends analyzed data to the FPGA in a pulse form, wherein the pulse is shown in FIG. 2; the FPGA analyzes data again, and a single pulse is divided into a long pulse and a plurality of short pulses, wherein the long pulse and the short pulses are as shown in figure 3, and the on-off of the MOS tube is driven through the optical coupler and the phase inverter to control the on-off of the sprayer.
The high speed solenoid valves, each representing a spray point, are a key component of the spray head, for a total of 16. The pulse signal controls the ink-jet time and the ink-jet duration time by controlling the on-off of the MOS tube so as to meet the jet requirements on different occasions. Because each injection time is short, the electromagnet must produce strong attraction force in short time to overcome the tension of the reset spring, and the formula of the electromagnetic attraction force is
F＝K(IW)2S/l2×9.8×10-8
(K is constant; I is coil current; W is number of turns of coil; S is core cross-sectional area; l is air gap size.)
From the above formula, the magnitude of the coil current determines the magnitude of the electromagnetic attraction force, when the hardware parameters are determined. However, the large current passing through the coil inevitably causes heating phenomenon, even burning, in order to avoid the phenomenon, a large current is needed when the valve is opened, and the current of the coil is rapidly reduced to a smaller value after the valve is opened, as shown in fig. 4. The valve can be maintained in the open state only by small suction force after the valve is opened, so that the power consumption of the coil can be greatly reduced, and the long-term reliable operation of the whole ink jet system is ensured. Calculating the total average power consumed by each electromagnetic valve according to the current waveform and the coil load resistance:
IPthe peak current of the solenoid valve coil; r is a coil copper resistor; t isPTo achieve maximum peak duration; i isSMaintaining the current after the electromagnetic valve is opened; t isSTo maintain current duration; t isDIs the ink jet cycle duty cycle.
According to formula analysis, the power consumption in the opening stage of the solenoid valve accounts for a large proportion, and the power consumption is less along with the increase of the proportion in the current maintaining stage. Therefore, the problem can be well solved by using the FPGA for pulse signal modulation, and the long-term reliable operation of the jet printing control equipment is ensured.
The invention is suitable for spray printing identification characters on steel products such as steel plates, steel pipes and the like in a steel mill, wherein the spray printed characters comprise numbers, capital and lower case letters, symbols and special symbols, for example, abnormal shapes such as exclusive figures and the like, such as trademarks and logos. The application example of the slab plant is further described below.
The invention is used in combination with PLC and mechanical arm in thick plate factory. The communication between the jet printing control device, the mechanical arm and the PLC end needs complex secondary programming to be completed, and the jet printing control device and the mechanical arm can be suitable for severe steel mill environments. On site, flying metal dust, motor interference under different powers and whether stable operation among systems can be uncertain factors of whether the steel plate can be normally sprayed and printed for a long time. The alarm indicator can obviously inform field workers of the current running state of the machine, and information fed back during the running of the jet printing control device can accurately position the fault reason; the pi-type filter network can reduce the adverse effect of an external strong electromagnetic field on a circuit; the MCU control system effectively shields external messy codes from entering a main program; the phase inverter in the photoelectric isolation system has the function of a Schmitt trigger, has a filtering effect on signal transmission and ensures the stability of the signal transmission.
As shown in fig. 1, the jet printing control device suitable for jet printing in an unstable environment of a steel mill of the present invention includes a control circuit power supply system, an MCU control system, an FPGA modulation system, a photoelectric isolation system, and a driving module system. The control circuit power supply system comprises an ACDC module, a power indicator, a 3.3V voltage stabilizing chip, a 1.8V voltage stabilizing chip and a DCDC module; the MCU control system comprises a singlechip, a reset chip, a reset switch, an RS232 protocol chip, a UART interface, a phase inverter and an input/output hardware interface; the FPGA modulation system comprises an FPGA, a fault indicator, an AD acquisition module and an input/output hardware interface; the photoelectric isolation system comprises an ACDC module, a pi-type filter circuit, a high-speed optical coupler, a phase inverter, a relay and an input-output hardware interface; the driving module system comprises an MOS tube, an overvoltage protection device, an overcurrent protection device, an anti-reverse connection device and an input/output hardware interface; the ACDC module is respectively connected with the pi-type filter circuit, the 3.3V voltage stabilizer and the 1.8V voltage stabilizer; the single chip microcomputer is respectively connected with the reset chip, the 232 protocol chip, the UART interface and the input/output hardware interface; the FPGA is respectively connected with the fault indicator, the AD acquisition module and the input/output hardware interface; the MOS tube is connected with the overvoltage protection device, the overcurrent protection device, the reverse connection prevention device and the input and output hardware interface.
Under the condition that the voltage of the spray head reaches 250V, the action of a single long pulse control MOS can cause a large amount of heat generated by an MOS tube and an electromagnetic valve in the spray head to burn, and the condition can be well avoided by using FPGA modulation. As can be seen from fig. 2, the pulse width of the pulse generated by the single chip microcomputer is 280us, and as can be seen from fig. 3, the pulse signal modulated by the FPGA is decomposed into 1 longer pulse having a pulse width of 70us and 14 shorter pulses having a pulse width of 10us, the longer pulse is used to open the solenoid valve, and the shorter pulse is used to maintain the state of the solenoid valve. The isolation circuit is specifically composed of a high-speed optical coupler chip and a phase inverter chip, the FPGA transmits a signal into the front end of the optical coupler, the high-speed optical coupler chip is triggered to work, the rear end controls an MOS (metal oxide semiconductor) tube switch through the phase inverter chip, the sprayer is driven by 250V voltage, the single chip microcomputer and the FPGA are 3.3V weak current, the isolation voltage of the high-speed optical coupler chip can reach 2500V, and therefore the isolation circuit is used for isolating the strong current and the weak current, so that the spray printing control device is an important guarantee for good operation.
The MCU main control chip adopts a singlechip with the model of LPC2214/01 produced by NXP company, the pipeline structure of the MCU main control chip can quickly respond to the instruction of the system, and the MCU main control chip is provided with abundant peripheral interfaces and can stably run for a long time as an industrial chip. The stable power supply system is the guarantee of normal operation of the circuit, and the ACDC module selects ULNION WA3-220S05A3 module, and has the characteristics of filtering function and stable output. The two voltage stabilizing chips adopt LM1117MPX series voltage stabilizing chips produced by National Semiconductor company, and meet the power supply requirements of an MCU control system and an FPGA modulation system. The input and output hardware interface uses a connector of a phoenix original factory, and the connection stability is greatly guaranteed. The UART interface adopts a MAX3232CSE chip produced by Texas Instruments, which can be used as an auxiliary communication means of a computer compatible with early configuration of a factory and can also be used for burning programs through a UART interface. The reset chip adopts MAX708RCUA reset chip of NXP company. The inverter is an MC74HC125AD chip from ON Semiconductor. FPGAs are available from Altera corporation because they are flexible and reliable and can support multiple standards on the same platform. The implementation of a fault indicator can indicate the current status. The high-speed optical coupler is TLP521 optical coupler of Toshiba Semiconductor company because of high isolation and response speed. The MOS tube adopts 2SK2372 of N channel of NEC company, which can ensure enough current to drive the electromagnetic valve.
The invention is suitable for the mode of jet printing characters on steel products in a steel plant, a plurality of more complex modules are required to work cooperatively, in order to realize simple and efficient control, the main process of an event is summarized as the switching of feedback information, each indicator on a module system can reflect the state of the module system, and the feedback information received by a PLC end can detect whether each link works normally or not, because each link has the possibility of failure, a state feedback mechanism can effectively position the failure source, and the production stop loss is reduced.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. A dot matrix size controllable type spray head control system is characterized by comprising a control circuit power supply module, an MCU control module, an FPGA modulation module, a photoelectric isolation module and a driving module;
the control circuit power supply module: providing a control power supply for the movement of the spray head;
the MCU control module: the system is communicated with an upper computer, receives jet printing information sent by the upper computer, processes the jet printing information, acquires a pulse signal, and outputs the pulse signal to an FPGA modulation module;
an FPGA modulation module: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to the photoelectric isolation module;
the photoelectric isolation module: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving module;
a driving module: receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move;
the control circuit power supply module is connected with the MCU control module and the FPGA modulation module;
the MCU control module, the FPGA modulation module, the photoelectric isolation module and the driving module are connected in sequence.
2. The lattice size controllable type spray head control system according to claim 1, wherein the control circuit power supply module mainly comprises a first ACDC module, a power indicator, a 3.3V voltage stabilizer, a 1.8V voltage stabilizer, a DCDC module and a first pi-type filter circuit;
a first output end of the first ACDC module is connected with a first input end of the power indicator;
a second output end of the first ACDC module is connected with a first input end of the first pi-type filter circuit;
the first output end of the first pi-type filter circuit is connected with the first input end of the DCDC module;
the first output end of the DCDC module is connected with the second input end of the power indicator;
and a second output end of the DCDC module is connected with an input end of the 3.3V voltage stabilizer and an input end of the 1.8V voltage stabilizer, and the 3.3V voltage stabilizer is connected with the 1.8V voltage stabilizer in parallel.
3. The lattice size controllable nozzle control system according to claim 1, wherein the MCU control module mainly comprises a single chip, a reset switch, an RS232 protocol chip, a UART interface, a first inverter, and an input/output hardware interface;
the first output end of the singlechip is connected with the input and output hardware interface;
the second output end of the singlechip is connected with the reset chip, the reset switch, the RS232 protocol chip and the UART interface;
the reset chip is connected with the first phase inverter.
4. The lattice size controllable nozzle control system according to claim 1, wherein the FPGA modulation module mainly comprises an FPGA, a fault indicator, an AD acquisition module, and an input-output hardware interface;
the first output end of the FPGA is connected with the fault indicator;
the second output end of the FPGA is connected with the input end of the AD acquisition module;
the FPGA is connected with the input and output hardware interface.
5. The lattice size controllable nozzle control system according to claim 1, wherein the photoelectric isolation module mainly comprises a second ACDC module, a second pi-type filter circuit, a high-speed optical coupler, a second inverter, a relay and an input/output hardware interface;
a first output end of the second ACDC module is connected with an input end of the second pi-type filter circuit;
the output end of the second pi-type filter circuit is respectively connected with the first input end of the high-speed optocoupler, the first input end of the second inverter and the first input end of the relay;
the first output end of the high-speed optocoupler is connected with the second input end of the second phase inverter;
the first output end of the second phase inverter is connected with the second input end of the relay;
and the second output end of the high-speed optical coupler is connected with the input and output hardware interface.
6. The lattice size controllable type nozzle control system according to claim 1, wherein the driving module mainly comprises an MOS tube, an overvoltage protection device, an overcurrent protection device, an anti-reverse connection device and an input and output hardware interface;
the first input end of the MOS tube is connected with the overvoltage protection device;
the second input end of the MOS tube is connected with the overcurrent protection device;
the output end of the MOS tube is respectively connected with the reverse connection preventing device and the input and output hardware interface.
7. A dot matrix size controllable showerhead control system according to claim 1, wherein the showerhead includes a plurality of solenoid valves, the solenoid valves generating electromagnetic attractive force F, the electromagnetic attractive force F satisfying the following formula:
F＝K(IW)2S/l2×9.8×10-8
wherein K represents a constant; i represents the coil current; w represents the number of coil turns; s represents the sectional area of the iron core; l represents an air gap value.
8. The lattice size controllable showerhead control system of claim 7, wherein the solenoid valve consumes total average power PLThe following formula is satisfied:
in the formula IPRepresenting a peak current of a coil of the solenoid valve; r represents a coil copper resistance; t isPIndicating the maximum peak duration is reached; i isSIndicating the maintained current value after the solenoid valve is opened; t isSRepresents the sustain current duration; t isDIndicating the ink ejection cycle duty cycle.
9. A control method of a nozzle with controllable dot matrix size is characterized by comprising a circuit power supply control step, an MCU control step, an FPGA modulation step, a photoelectric isolation step and a driving step;
controlling a circuit power supply: providing a control power supply for the movement of the spray head;
MCU control step: communicating with an upper computer, receiving jet printing information sent by the upper computer, processing the jet printing information, acquiring a pulse signal, and outputting the pulse signal to an FPGA (field programmable gate array) modulation step;
and (3) FPGA modulation step: receiving the pulse signal, analyzing the pulse signal to obtain a long pulse signal and a short pulse signal, and outputting the long pulse signal and the short pulse signal to a photoelectric isolation step;
photoelectric isolation: receiving and processing the long pulse signal and the short pulse signal to form a driving MOS tube signal, and outputting the driving MOS tube signal to a driving step;
a driving step: and receiving a driving MOS tube signal, controlling the on-off of current according to the driving MOS tube signal, and driving the spray head to move.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6467867B1 (en) * | 1997-09-03 | 2002-10-22 | Macdermid Acumen, Inc. | Method and apparatus for registration and color fidelity control in a multihead digital color print engine |
| CN101648462A (en) * | 2009-08-31 | 2010-02-17 | 湖南长城信息金融设备有限责任公司 | Control circuit of stylus printer based on FPGA module |
| CN102152621A (en) * | 2010-12-01 | 2011-08-17 | 杭州杰特电子科技有限公司 | Spray printing device capable of continuously regulating size of dot matrix and method thereof |
| CN202805958U (en) * | 2012-09-24 | 2013-03-20 | 东莞凯佳智芯电子科技有限公司 | Nozzle array control plate used for PCB high-speed jet printing |
| JP2013059433A (en) * | 2011-09-13 | 2013-04-04 | Seiko Epson Corp | Liquid injection device and medical apparatus |
| CN104002557A (en) * | 2014-05-05 | 2014-08-27 | 上海古鳌电子科技股份有限公司 | High-speed ink-jet printing module |
| CN105564028A (en) * | 2014-10-20 | 2016-05-11 | 中国科学院沈阳自动化研究所 | High-speed industrial jet printing control system and method based on FPGA technology |
| CN107538937A (en) * | 2016-06-28 | 2018-01-05 | 瞿小宁 | A kind of CAN designs based on FPGA |
| CN207088733U (en) * | 2017-07-10 | 2018-03-13 | 杭州通灵自动化股份有限公司 | A kind of digital code-spraying printhead driving plate of tape pulse waveform |
| CN107991947A (en) * | 2017-12-29 | 2018-05-04 | 上海应用技术大学 | A kind of solenoid-driven and its control method based on FPGA |
-
2018
- 2018-10-09 CN CN201811173846.XA patent/CN111016443B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6467867B1 (en) * | 1997-09-03 | 2002-10-22 | Macdermid Acumen, Inc. | Method and apparatus for registration and color fidelity control in a multihead digital color print engine |
| CN101648462A (en) * | 2009-08-31 | 2010-02-17 | 湖南长城信息金融设备有限责任公司 | Control circuit of stylus printer based on FPGA module |
| CN102152621A (en) * | 2010-12-01 | 2011-08-17 | 杭州杰特电子科技有限公司 | Spray printing device capable of continuously regulating size of dot matrix and method thereof |
| JP2013059433A (en) * | 2011-09-13 | 2013-04-04 | Seiko Epson Corp | Liquid injection device and medical apparatus |
| CN202805958U (en) * | 2012-09-24 | 2013-03-20 | 东莞凯佳智芯电子科技有限公司 | Nozzle array control plate used for PCB high-speed jet printing |
| CN104002557A (en) * | 2014-05-05 | 2014-08-27 | 上海古鳌电子科技股份有限公司 | High-speed ink-jet printing module |
| CN105564028A (en) * | 2014-10-20 | 2016-05-11 | 中国科学院沈阳自动化研究所 | High-speed industrial jet printing control system and method based on FPGA technology |
| CN107538937A (en) * | 2016-06-28 | 2018-01-05 | 瞿小宁 | A kind of CAN designs based on FPGA |
| CN207088733U (en) * | 2017-07-10 | 2018-03-13 | 杭州通灵自动化股份有限公司 | A kind of digital code-spraying printhead driving plate of tape pulse waveform |
| CN107991947A (en) * | 2017-12-29 | 2018-05-04 | 上海应用技术大学 | A kind of solenoid-driven and its control method based on FPGA |
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