CN115291819A - Airborne printing method and system based on file queue mode - Google Patents

Abstract

The invention discloses an airborne printing method and system based on a file queue mode, which relate to the technical field of airborne printing and are used for receiving printing operation messages of all airborne members and carrying out standardized processing on the printing operation messages; assembling the printing operation data in each printing operation message into a temporary file and numbering the temporary file; carrying out cache judgment according to the printing job file queue state of each current onboard printer; caching each temporary file into a corresponding printing operation file queue according to the cache judgment result to sequentially print the temporary files; the onboard member does not directly interact with the onboard printer to exchange messages, and the process of managing the file queue through generating temporary files and then performing cache judgment improves the efficiency of processing a plurality of print job tasks by a single onboard member system, and reduces the complexity of processing the print job tasks by the onboard printer and the onboard member system when the plurality of onboard member systems compete for the same onboard printer at the same time.

Description

Airborne printing method and system based on file queue mode

technical field

The invention relates to the technical field of airborne printing, in particular to an airborne printing method and system based on a file queue mode.

Background technique

In the current airborne printing operation environment, the airborne member system is usually directly connected to the Ethernet interface or ARINC429 interface of the airborne printer, and realizes the printing of files by sending a print message to the airborne printer.

Airborne printers have mechanical actions such as paper feeding and inkjet when printing jobs, and are limited by airborne printer software, hardware technology, economic factors, etc., the printing speed of airborne printers (text, image) is usually far behind Speed at which messages are printed from onboard member systems. For a single onboard member system, since more and more content needs to be printed, when there are multiple print jobs, the transmission of the next print job cannot be performed until the data transmission of the current print job is completed. Therefore, resources such as CPU and memory required for the operation of the onboard member system will be greatly wasted while the next print job is waiting to be transmitted.

At the same time, with the increasing demand for various electronic devices and software functions of the aircraft, the number of onboard member systems has gradually increased, resulting in multiple airborne member systems competing for the same onboard printer at the same time, resulting in low printing efficiency , Handle the problem of increased complexity of printing tasks. In order to meet the print job requirements of multiple on-board member systems, on-board printers can also be appropriately added, but the increase in the number of on-board printers and the differences in models also exacerbate the complexity of the management of printing devices in the on-board printing environment.

At present, some non-airborne general printing architectures or solutions are too complicated compared with airborne printing requirements. For example, the Microsoft Windows printing architecture includes both a print spooler and a printer driver to meet the printing requirements of multiple devices Mostly, by calling device-independent functions, an application can create a print job and send it to a printing device. At the same time, airborne printers and airborne servers are mostly dedicated equipment on the aircraft, and the communication protocol is different from that of non-airborne equipment, which also leads to the fact that general printing architectures or solutions cannot be directly applied to them.

Contents of the invention

The technical problem to be solved by the present invention is: the contradiction between the slow printing speed of the airborne printer, the fast sending speed of the print job message, and the large number of print jobs, and the reduction of the printing job tasks and The management complexity of printing equipment; the object of the present invention is to provide a kind of airborne printing method and system based on file queue mode, airborne members do not directly exchange messages with the airborne printer, but judge the file by generating temporary files and then through the cache The process of queue management improves the efficiency of a single on-board member system in processing multiple print job tasks, and reduces the simultaneous competition of multiple on-board member systems for the same on-board printer when the on-board printer and on-board member systems process print jobs complexity.

The present invention realizes through following technical scheme:

The present invention provides a kind of airborne printing method based on file queue mode, comprising steps:

T1. Receive the print job messages of each airborne member, and standardize the print job messages;

T2. Assemble the print job data in each print job message into a temporary file, and number the temporary file;

T3. Perform cache judgment based on the serial number of the temporary file and the current print job file queue status of each onboard printer;

T4. Caching each temporary file into a corresponding print job file queue according to the caching judgment result;

T5. Each of the onboard printers prints the temporary files sequentially according to their corresponding print job file queues.

The working principle of this solution: the contradiction between the slow printing speed of the onboard printer and the fast sending speed of the print job message, the large number of print jobs, and the reduction of the print job task and the management of the printing device in the presence of multiple onboard printers Complexity; this solution provides an airborne printing method based on the file queue mode. The sending speed of the airborne member print job is no longer limited by the performance of the airborne printer. It can be used as an airborne member system and an airborne printer The temporary file of the bridge between the bridges is used to complete the printing job, which solves the contradiction between the fast sending speed of the printing message of the airborne member system and the slow printing speed of the airborne printer. The problem that the next print job cannot be started before it is completed improves the efficiency of a single onboard member in processing multiple print jobs, and reduces the time that the onboard member occupies CPU, memory and other resources when processing multiple print jobs ;Manage the print job file queue through cache judgment, realize the unified push processing of print job tasks, improve the printing efficiency in the presence of multiple airborne member systems, and reduce the simultaneous contention of multiple airborne member systems for the same Onboard Printers When onboard printers and onboard member systems handle the complexity of print job tasks.

A further optimization solution is that the standardized processing includes uniformly processing the communication protocols of each airborne member.

A further optimization solution is that the print job message includes: label field, print job command, print job content and page layout information of the print job file.

A further optimization solution is that the temporary file includes print job content and page layout information of the print job file.

The further optimization scheme is that T2 includes the process:

Parse the standardized print job message;

Generate a temporary PDF file from the print job content in the print job message and the page layout information of the print job file;

The value of the label field in the print job message is used as the serial number of the PDF temporary file, and the label field is filled with an address label specifying the onboard printer or an 8-bit binary number with a value of 0b11111111.

The further optimization scheme is that T3 includes the following sub-steps:

S1: read the number of the temporary file;

S2: Determine whether there is a print job file queue corresponding to the number of the temporary file, if so, enter S3, otherwise enter S4;

S3: Cache the current temporary file to the tail of the corresponding print job file queue, end;

S4: judge whether the serial number of the temporary file is 0b11111111, if so, enter S5, otherwise end and give an error message;

S5: Determine whether the print job file queue with the shortest queue is unique, if so, cache the current temporary file to the end of the print job file queue with the shortest queue, and end; otherwise, cache the current temporary file to any print job file queue with the shortest queue The end of the queue, the end.

A further optimization scheme is that the printing process of the temporary file includes:

Send temporary files to the on-board printer for printing sequentially from the head to the end of the queue according to the order of the temporary file cache in the print job file queue;

After printing a temporary file, the airborne printer deletes the temporary file, and then prints the next temporary file until all the temporary files are printed.

Each onboard printer will have an 8-bit binary number address label that identifies a unique identity, called the onboard printer address label; when the onboard member sends a print job message, the print job message will carry a label field, and the label field is filled An onboard printer address label or an 8-bit binary number with a value of 0b11111111, the value of the label field sent by the onboard member is used as the number of the temporary file.

This solution also provides an airborne printing system based on the file queue mode, which is applied to the above-mentioned airborne printing method based on the file queue mode, including: a job receiving and standardized processing module, a print job file generation module, a print job file push module and Print job file queue and sending module;

The job receiving and standardization processing module is used to receive the print job messages of each airborne member, and standardize the print job messages;

The print job file generating module is used to assemble the print job data in each print job message into a temporary file, and number the temporary file;

The print job file push module is used to perform cache judgment based on the serial number of the temporary file and the print job file queue status of each onboard printer, and push the temporary file and the cache judgment result to the print job file queue and the sending module;

The print job file queue and the sending module are used to cache each temporary file into the corresponding print job file queue according to the cache judgment result;

The print job file queue and the sending module are also used to interact with each onboard printer, and print temporary files sequentially according to the corresponding print job file queue.

In this scheme, the on-board members do not directly exchange messages with the on-board printer, but the job receiving and protocol processing module installed on the on-board server receives and replies the printing message according to the standard on-board printing message protocol; message interaction, and after analyzing the data of the original communication protocol message, the print job file generation module generates a temporary file in PDF format according to the print data in the message; the temporary file not only contains the content information of the file to be printed, but also It contains the page layout information of the print job file, which is completely consistent with the file content and page layout printed by the onboard printer.

When the print job file push module is started, it will generate a corresponding print job file queue for each onboard printer according to the number of onboard printers in the current onboard print job environment, so that the onboard printer and the print job file queue are one by one Corresponding relationship; each print job file queue will have a number, which is the corresponding onboard printer address label. After the print job generation module generates the temporary file, it sends it to the print job file push module, and the print job file push module caches the generated temporary file to the specified print job by judging the number of the temporary file and the status of the current print job file queue. Job file queue. If multiple temporary files are cached in the print job file queue, it indicates that the print job file pushing module will sequentially take out the temporary files from the head to the tail of the queue and push them to the corresponding onboard printers for printing.

The further optimization scheme is that each airborne member is connected to the job receiving and standardized processing module through the Ethernet interface, ARINC429 interface or AFDX interface;

The print job file queuing and sending module is connected with each onboard printer through an Ethernet interface or an ARINC429 interface.

A further optimization solution is that the print job file queue and the sending module include a plurality of print job file queues, each print job file queue corresponds to an onboard printer, and the print job file queue and the corresponding onboard printer are connected via Ethernet Network interface or ARINC429 interface for interaction.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

In the airborne printing method and system based on the file queue mode provided by the present invention, the airborne members do not directly exchange messages with the airborne printer, but manage the file queue by generating temporary files and then judging by caching, which improves the efficiency of printing. The efficiency of a single on-board member system for processing multiple print job tasks reduces the complexity of the on-board printer and the on-board member system for processing print job tasks when multiple on-board member systems compete for the same on-board printer at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work. In the attached picture:

Fig. 1 is a schematic flow chart of an airborne printing method based on a file queue mode;

Fig. 2 is a schematic diagram of the temporary file assembly process;

FIG. 3 is a schematic diagram of a cache judgment process;

Fig. 4 is the schematic diagram of the printing process of temporary file;

Fig. 5 is a schematic diagram of an airborne printing system based on a file queue mode;

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

Example 1

This embodiment provides an airborne printing method based on the file queue mode, as shown in Figure 1, including steps:

T1. Receive the print job messages of each airborne member, and standardize the print job messages;

T2. Assemble the print job data in each print job message into a temporary file, and number the temporary file;

T3. Perform cache judgment based on the serial number of the temporary file and the current print job file queue status of each onboard printer;

T4. Caching each temporary file into a corresponding print job file queue according to the caching judgment result;

T5. Each of the onboard printers prints the temporary files sequentially according to their corresponding print job file queues.

The standardized processing includes uniformly processing the communication protocols of each airborne member.

The print job message includes: label field, print job command, print job content and page layout information of the print job file.

The temporary file includes print job content and page layout information of the print job file.

As shown in Figure 2, T2 includes the process:

Parse the standardized print job message;

Generate a temporary PDF file from the print job content in the print job message and the page layout information of the print job file;

The value of the label field in the print job message is used as the serial number of the PDF temporary file, and the label field is filled with an address label specifying the onboard printer or an 8-bit binary number with a value of 0b11111111.

As shown in Figure 3, T3 includes the following sub-steps:

S1: read the number of the temporary file;

S2: Determine whether there is a print job file queue corresponding to the number of the temporary file, if so, enter S3, otherwise enter S4;

S3: Cache the current temporary file to the tail of the corresponding print job file queue, end;

S4: judge whether the serial number of the temporary file is 0b11111111, if so, enter S5, otherwise end and give an error message;

S5: Determine whether the print job file queue with the shortest queue is unique, if so, cache the current temporary file to the end of the print job file queue with the shortest queue, and end; otherwise, cache the current temporary file to any print job file queue with the shortest queue The end of the queue, the end.

When the number of the temporary file is the same as the address label of an on-board printer, it indicates that the on-board member system expects the temporary file to be printed by the on-board printer; therefore, the generated temporary file is directly pushed to the number and The same print job file queue is buffered at the end of the print job file queue.

If the binary value of the temporary file number is 0b11111111, it indicates that the generated temporary file can be printed by any on-board printer in the system, and the on-board member system does not make mandatory requirements on which on-board printer is selected by the print job file push module to print the temporary file; At this point, the print job file push module will specify the queue to which the temporary file is pushed according to the print job file queue and the current queuing status of all print job file queues reported by the sending module, which can be divided into the following two situations:

When there is only one print job file queue with the least number of temporary files queued, the temporary file is pushed to the print job file queue and cached at the end of the print job file queue;

When the print job file queue with the least queued number of temporary files is greater than or equal to one, the randomized algorithm is used to randomly push the temporary files to a print job file queue with the smallest queued number, and cache them at the end of the print job file queue.

As shown in Figure 4, the printing process of temporary files includes:

Send temporary files to the on-board printer for printing sequentially from the head to the end of the queue according to the order of the temporary file cache in the print job file queue;

After printing a temporary file, the airborne printer deletes the temporary file, and then prints the next temporary file until all the temporary files are printed.

When there are queued temporary files in the print job file queue, the print job file queue and sending module will actively correspond to the print job file queue according to the standard file printing protocol (such as Arinc744, Arinc744A, LPR/LPD, etc.) according to the type of the onboard printer The on-board printer interacts with printing messages to realize the printing of files. The print job file queue sends temporary files to the on-board printer sequentially from the head to the tail of the queue according to the sequence of the temporary file cache. After printing a temporary file, delete the corresponding temporary file, and then print the next temporary file until all the temporary files are printed.

Example 2

An airborne printing system based on the file queue mode, as shown in Figure 5, is applied to the airborne printing method based on the file queue mode described in the previous embodiment, including: a job receiving and standardized processing module, and a print job file generation module, print job file push module and print job file queue and sending module;

The job receiving and standardization processing module is used to receive the print job messages of each airborne member, and standardize the print job messages;

The print job file generating module is used to assemble the print job data in each print job message into a temporary file, and number the temporary file;

The print job file push module is used to perform cache judgment based on the serial number of the temporary file and the print job file queue status of each onboard printer, and push the temporary file and the cache judgment result to the print job file queue and the sending module;

The print job file queue and the sending module are used to cache each temporary file into the corresponding print job file queue according to the cache judgment result;

The print job file queue and the sending module are also used to interact with each onboard printer, and print temporary files sequentially according to the corresponding print job file queue.

Each airborne member is connected to the job receiving and standardization processing module through the Ethernet interface, ARINC429 interface or AFDX interface;

The print job file queuing and sending module is connected with each onboard printer through an Ethernet interface or an ARINC429 interface.

The print job file queue and the sending module include a plurality of print job file queues, each print job file queue corresponds to an onboard printer, and the print job file queue and the corresponding onboard printer are connected through an Ethernet interface or an ARINC429 interface to interact.

The invention proposes to generate temporary files including print file content and page layout by analyzing the data in the print protocol message sent by the on-board member system; meanwhile, a method for numbering the temporary files and print job file queues is designed. According to the numbers of the temporary files, an algorithm is designed to push the temporary files to the print job file queue, including the temporary file push of the specified onboard printer and the temporary file push of the unspecified onboard printer. It solves the contradiction between the fast printing speed of the on-board member system and the slow printing speed of the on-board printer, improves the efficiency of a single on-board member system in processing multiple print jobs, and reduces the need for the on-board member system to process multiple print jobs It takes time for resources such as CPU and memory; through the management of file queues, the unified push processing of print job tasks is realized, which improves the printing efficiency when multiple onboard member systems exist, and reduces the number of onboard member systems. When the system competes for the same on-board printer at the same time, the on-board printer and the on-board member system process the complexity of printing job tasks, reducing the complexity of managing multiple on-board printers.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. An airborne printing method based on a file queue mode is characterized by comprising the following steps:

t1, receiving printing operation messages of all airborne members, and carrying out standardized processing on the printing operation messages;

t2, assembling the print job data in each print job message into a temporary file, and numbering the temporary file;

t3, performing cache judgment based on the number of the temporary file and the printing job file queue state of each current onboard printer;

t4, caching each temporary file into a corresponding print job file queue according to a cache judgment result;

and T5, sequentially printing the temporary files by each onboard printer according to the corresponding print job file queue.

2. The method according to claim 1, wherein the standardization process comprises a uniform process of communication protocols of each onboard member.

3. The method of claim 1, wherein the print job message comprises: a tag field, a print job command, print job content, and page layout information of the print job file.

4. The method of claim 3, wherein the temporary document includes print job content and page layout information of the print job document.

5. The method according to claim 3, wherein T2 comprises:

analyzing the print job information after the standardized processing;

generating a PDF temporary file by the printing operation content in the printing operation message and the page layout information of the printing operation file;

the value of the tag field in the print job message, which is filled with the 8-bit binary number specifying the onboard printer address tag or a value of 0b11111111, is taken as the number of the PDF temporary file.

6. The method for printing on-board a document queue mode according to claim 5, wherein T3 comprises the following sub-steps:

s1: reading the number of the temporary file;

s2: judging whether a print job file queue corresponding to the number of the temporary file exists, if so, entering S3, and otherwise, entering S4;

s3: caching the current temporary file to the tail of the corresponding printing operation file queue, and ending;

s4: judging whether the number of the temporary file is 0b11111111, if so, entering S5, and otherwise, finishing and carrying out error prompt;

s5: judging whether the printing operation file queue with the shortest queuing is unique, if so, caching the current temporary file to the tail of the printing operation file queue with the shortest queuing, and ending; otherwise, the current temporary file is cached to the tail of any print job file queue with the shortest queue, and the process is finished.

7. The method according to claim 1, wherein the temporary document printing process comprises:

sequentially sending the temporary files from the head of the queue to the tail of the queue to an onboard printer for printing according to the sequence of temporary file cache in the printing operation file queue;

after the on-board printer finishes printing one temporary file, the temporary file is deleted, and then the next temporary file is printed until all the temporary files are printed.

8. An onboard printing system based on a file queue mode is applied to the onboard printing method based on the file queue mode, and comprises the following steps: the system comprises a job receiving and standardization processing module, a print job file generating module, a print job file pushing module and a print job file queue and sending module;

the operation receiving and standardization processing module is used for receiving the printing operation messages of all airborne members and carrying out standardization processing on the printing operation messages;

the printing operation file generation module is used for assembling the printing operation data in each printing operation message into a temporary file and numbering the temporary file;

the printing operation file pushing module is used for carrying out cache judgment based on the serial number of the temporary file and the printing operation file queue state of each current onboard printer, and pushing the temporary file and the cache judgment result to the printing operation file queue and sending module;

the printing operation file queue and sending module is used for caching each temporary file into the corresponding printing operation file queue according to the caching judgment result;

and the printing job file queue and sending module is also used for interacting with each onboard printer and sequentially printing the temporary files according to the corresponding printing job file queue.

9. The on-board printing system based on the file queue mode as claimed in claim 8, wherein each on-board member is connected with the job receiving and standardization processing module through an ethernet interface, an ARINC429 interface or an AFDX interface;

the printing operation file queue and sending module is connected with each machine-mounted printer through an Ethernet interface or an ARINC429 interface.

10. The file queue mode-based airborne printing system of claim 9, wherein the print job file queue and sending module comprises a plurality of print job file queues, each print job file queue corresponds to an airborne printer, and the print job file queues interact with the corresponding airborne printer through an ethernet interface or an ARINC429 interface.

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