CN110077125B

CN110077125B - Printing ink-jet control system

Info

Publication number: CN110077125B
Application number: CN201910310505.0A
Authority: CN
Inventors: 沈启宏; 金锋权
Original assignee: Shanghai Hongjian Automation Equipment Co ltd
Current assignee: Shanghai Hongjian Automation Equipment Co ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2021-01-01
Anticipated expiration: 2039-04-17
Also published as: CN110077125A

Abstract

The invention relates to a printing technology, in particular to a printing ink jet control system. A printing inkjet control system, comprising a control board, the control board being connected to a programmable logic controller, comprising: a main control chip; an interrupt handler; a CAN bus interface; a display chip; the control board executes the following main cycle steps: 1. reading a key, judging whether the key is pressed, if so, executing step 2, and if not, executing step 3; 2, sending a key message; 3, analyzing and displaying the display data; 4, judging whether a timer interrupt response exists or not, if so, executing 5, and if not, executing 6; 5, sending a heartbeat packet; and 6, feeding a watchdog and executing 1. According to the invention, the ARM main control chip, the software program written by the C language, the main control software and the CAN are arranged for communication, so that the data storage capacity is increased, the software development cost and difficulty are reduced, and the operation of a user CAN be timely fed back to the system and the operation result is displayed in real time for verification.

Description

Printing ink-jet control system

Technical Field

The invention relates to a printing technology, in particular to a printing ink jet control system.

Background

The ink jet printing is to be applied to an ink jet printer, which is an ink jet printing type high-tech digital printing device which is in non-contact with an object, so that the ink jet printer can be used for color photo-grade printing on the surfaces of boards, glass, crystals, metal plates, floor tiles, ceramic tiles, compact discs, acrylic, organic glass, EVA (ethylene vinyl acetate) KT boards, leather, silica gel, plastic, PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), cloth, non-setting adhesive, stone and the like without being limited by any material. The pattern can be printed at one time no matter in simple block color, full color or excessive color, and has the advantages of no need of plate making, plate burning and repeated color register, beautiful color, vivid effect, waterproof image, sun protection, high wear resistance and adhesion, no color fading, simple machine operation and stable performance.

The printing ink-jet precise control circuit board is an important component of an ink-jet printer, the existing printing ink-jet precise control circuit board adopts an FPGA chip as a main control chip, and Verilog HDL is used as a software development language, so that the difficulty of software development is increased, the development period is long, and the maintainability is poor. The existing printing equipment adopts buttons or knobs to control the equipment, a control panel is directly connected with a programmable logic controller, and control software for checking and reporting to an upper computer is not provided, so that the upper computer cannot display and record operation.

Disclosure of Invention

The present invention is directed to a printing inkjet control system, which solves the above problems.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

a printing ink jet control system, comprising,

a control panel, the control panel is connected with a programmable logic controller, the control panel comprises:

a main control chip;

the dial switch is connected with the main control chip and used for setting equipment ID;

the interrupt processor is connected with the main control chip;

the CAN bus interface is connected with the main control chip and the programmable logic controller;

the three display chips are connected with the main control chip and are used for displaying the state and the operation record of the control panel in real time;

the control board executes the following main cycle steps after the initialization step:

step 1, reading key information, judging whether a key is pressed down, if yes, executing step 2, and if not, executing step 3;

step 2, sending key message information;

step 3, analyzing the display data and sending an instruction to the display chip;

step 4, judging whether a timer interrupt response exists, if so, executing step 5, and if not, executing step 6;

step 5, sending a heartbeat packet, wherein the heartbeat packet is used for monitoring whether the connection is lost or not by an upper computer;

and 6, feeding a watchdog timer and executing the step 1.

Preferably, the display chip is connected with the main control chip through an SPI bus on the main control chip.

Preferably, the control panel further comprises a matrix keyboard and a nixie tube driving chip, the nixie tube driving chip is connected with the display chip, and the instruction of the step 3 is sent to the display chip through the nixie tube driving chip.

Preferably, the interrupt handler includes a timer, a watchdog timer and a CAN message reception interrupter.

Preferably, the main control chip adopts an ARM chip, and the ARM chip is based on a Cortex-M3 kernel MCU or a Cortex-M0 kernel MCU.

Preferably, the interrupt handler provides interrupt service to the main loop step.

Preferably, the initializing step includes:

step 01, electrifying to initialize the on-chip peripheral and perform self-checking;

step 02, reading the equipment ID set by the dial switch, wherein the equipment ID is an equipment identification number;

step 03, setting parameters on the CAN bus interface, and starting a filter;

step 04, starting the interrupt handler.

Preferably, the filter is connected to the CAN bus interface.

Preferably, the programs of the initialization step and the main loop step are written in C language.

Has the advantages that: by adopting the technical scheme, the invention increases the data storage capacity, reduces the software development cost and difficulty of the control panel and solves the problems of delay and loss in data transmission by arranging the ARM main control chip and the software program written in the C language, and meanwhile, the main control software and the CAN are arranged for communication, so that the operation of a user CAN be timely fed back to the system and the operation result CAN be displayed in real time for verification.

Drawings

FIG. 1 is a diagram illustrating a hardware connection structure according to an embodiment of the present invention;

FIG. 2 is a flow chart of a software routine of one embodiment of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

Referring to fig. 1, fig. 2, a printing inkjet control system, comprising,

a control panel 1, control panel 1 connects programmable logic controller 2, and control panel 1 includes:

the main control chip 11 is mainly used for detecting operation and verifying the operation;

the dial switch 12 is connected with the main control chip 11 and used for setting equipment ID, wherein the equipment ID is an equipment identification number;

an interrupt processor 13 connected with the main control chip 11;

a CAN bus interface 15 connected with the main control chip 11 and the programmable logic controller 2;

the three display chips 14 are connected with the main control chip 11 and are used for displaying the state and the operation record of the control panel 1 in real time;

the control board 1 performs the following main loop steps after the initialization step:

step 2, sending key message information: after detecting the change of the keys, firstly detecting the rationality of the operation, and then sending key information on the CAN bus interface 15 so as to facilitate the recording of an upper computer;

step 3, analyzing the display data, and when the display data is displayed, the control panel 1 analyzes the data received on the CAN bus interface 15 into an array of the lamp post and the nixie tube which need to be lightened, and sends the array of the lamp post and the nixie tube to the three display chips 14 through the SPI bus 111 to lighten the LEDs;

step 4, judging whether the timer 131 interrupts the response, if so, executing step 5, and if not, executing step 6;

step 5, sending heartbeat packets outwards at set time intervals, wherein the heartbeat packets are used for monitoring whether the upper computer is disconnected or not, and the set time is consistent with the set time of the timer 131;

and 6, feeding the watchdog timer 132 to prevent the watchdog timer 132 from counting overflow, so that the watchdog timer 132 can be automatically reset when a hardware error occurs, and executing the step 1.

The software adopts a single-cycle program framework, the key reading, key information analysis and algorithm presetting analysis are reasonable in operation, and the system is good in real-time performance and stability.

As a preferred embodiment of the present invention, the display chip 14 is connected to the main control chip 11 through the SPI bus 111 on the main control chip 11.

As a preferred embodiment of the present invention, the control board 1 further includes a matrix independent keyboard 16 and a nixie tube driving chip 17, the matrix independent keyboard 16 can effectively reduce the number of IO pins, and save the production cost, and the nixie tube driving chip 17 is connected to the display chip 14.

As a preferred embodiment of the present invention, the interrupt handler 13 includes a timer 131, a watchdog timer 132, and a CAN message reception interrupter 133.

As a preferred embodiment of the invention, the main control chip 11 adopts an ARM chip, the ARM chip is based on a Cortex-M3 kernel MCU or a Cortex-M0 kernel MCU, the ARM main control with low cost and low power consumption is adopted, the control panel software with high real-time and high reliability is realized by reasonably using onboard hardware and software architecture planning, the development difficulty is reduced, FLASH inside the MCU can store a large amount of data, and the data storage capacity is increased.

As a preferred embodiment of the present invention, the interrupt handler 13 provides an interrupt service for the main loop step, which improves the real-time performance and reliability of the whole control board software, and the main loop is used as a background program, in which the CAN communication part reports the operation and current state of the control panel, which is convenient for the user to observe and record.

As a preferred embodiment of the present invention, the initializing step includes:

step 02, reading the equipment ID set by the dial switch 12, and determining to receive and send data on the CAN bus interface 15;

step 03, setting parameters on the CAN bus interface 15, wherein the CAN bus 15 needs to set parameters such as SJW, BS1, BS2 and the like, starting the hardware filter 18, and only receiving required data frames, thereby reducing system overhead caused by unnecessary information;

step 04 starts the interrupt handler 13.

As a preferred embodiment of the invention, the filter 18 is connected to the CAN bus interface 15.

As a preferred embodiment of the invention, the programs of the initialization step and the main cycle step are written into C language, a front-background program framework is adopted, the operations of reading keys, sending key information, analyzing display content, controlling a display chip and the like are positioned in the program main cycle to serve as background programs, the timer interruption and the CAN message receiving interruption serve as foreground programs, software realizes the modularized design idea, and the customization and the secondary development for customers are facilitated.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. A printing ink jet control system, comprising,

a main control chip;

the interrupt processor is connected with the main control chip;

step 2, sending key message information;

and 6, feeding a watchdog timer and executing the step 1.

2. The printing ink jet control system of claim 1, wherein the display chip is connected to the main control chip through an SPI bus on the main control chip.

3. The system of claim 1, wherein the control board further comprises a matrix keyboard and a nixie tube driver chip, the nixie tube driver chip is connected to the display chip, and the command of step 3 is sent to the display chip through the nixie tube driver chip.

4. A print inkjet control system as in claim 1 wherein said interrupt handler includes a timer, a watchdog timer and a CAN message reception interrupter.

5. The printing ink jet control system of claim 1, wherein the main control chip is an ARM chip, and the ARM chip is an ARM chip based on a Cortex-M3 core MCU or a Cortex-M0 core MCU.

6. A print inkjet control system as claimed in claim 1 wherein said interrupt handler provides interrupt service to said main loop step.

7. A printing ink jet control system as claimed in claim 1, wherein said initializing step comprises:

step 02, reading the equipment ID set by the dial switch;

step 03, setting parameters on the CAN bus interface, and starting a filter;

step 04, starting the interrupt handler.

8. The printing inkjet control system of claim 7 wherein said filter interfaces with said CAN bus.

9. A print jetting control system as claimed in claim 1, wherein said initialization step and said main loop step are programmed in C language.