WO2022037179A1

WO2022037179A1 - Data processing method, apparatus, storage medium, and 3d printing apparatus

Info

Publication number: WO2022037179A1
Application number: PCT/CN2021/097594
Authority: WO
Inventors: 向东清
Original assignee: 珠海赛纳三维科技有限公司
Priority date: 2020-08-19
Filing date: 2021-06-01
Publication date: 2022-02-24
Also published as: CN113400650B; CN113400650A

Abstract

Provided are a data processing method, an apparatus, a storage medium, and a 3D printing apparatus, the method comprising: receiving original layer data for a 3D object to be printed; determining a correction parameter for the original layer data; performing correction on location data of each pixel point of each sliced layer in the original layer data according to the correction parameter, so as to obtain corresponding target location data; and determining corrected layer data according to the target location data of each pixel point of each sliced layer. Correction being performed on the locations of all pixel points for each sliced layer can allow print dots to be accurately sprayed onto the locations of theoretical pixel points, and 3D printing accuracy is consequently improved.

Description

Data processing method, device, storage medium and three-dimensional printing device

This application claims the priority of the Chinese patent application filed on August 19, 2020 with the application number 202010838654.7 and the application name "Data processing method, device, storage medium and three-dimensional printing device", the entire contents of which are by reference Incorporated in this application.

technical field

The embodiments of the present application relate to the technical field of three-dimensional printing, and in particular, to a data processing method, a device, a storage medium, and a three-dimensional printing device.

Background technique

3D printing technology is a technology that uses the principle of ordinary printers to connect the printer and the computer, load the raw materials into the fuselage, and finally turn the blueprint on the computer into a real object through the control of the computer. Three-dimensional printing is an "additive manufacturing" technology that adds materials layer by layer to create three-dimensional objects. Its core principle is: "layered manufacturing, layer by layer superposition".

In the prior art, during the actual printing movement of the printer, due to the influence of various factors, there will be errors in multi-layer printing, and the ink dots cannot be accurately ejected to the position of the theoretical pixel dots, resulting in low accuracy of 3D printing. .

SUMMARY OF THE INVENTION

The embodiments of the present application provide a data processing method, a device, a storage medium, and a three-dimensional printing device, which solve the problem that due to the influence of various factors, errors in multi-layer printing may occur during the actual printing movement of the printer in the prior art, and ink dots may It cannot be accurately sprayed to the exact pixel position, which in turn leads to a technical problem of low accuracy of 3D printing.

In a first aspect, an embodiment of the present application provides a data processing method, including:

Receive raw layer data of the 3D object to be printed;

determining the correction parameters of the original layer data;

Correct the position data of each pixel of each slice layer in the original layer data according to the correction parameter to obtain corresponding target position data;

The corrected layer data is determined according to the target position data of each pixel of each slice layer.

Further, in the above-mentioned method, the correction parameter includes a layer shift parameter;

The determining the correction parameter of the original layer data includes:

Determine the overlap error corresponding to the position data of each pixel of each slice layer according to the printing result of the three-dimensional printing device;

A layer shift parameter corresponding to the position data of each pixel point of each slice layer is determined according to the overlapping point error.

Further, in the above method, the influencing factors of the stacking error include any one or more of the following factors:

Printing head movement accuracy error, printing head movement feedback delay, and mechanical vibration of 3D printing device.

Further, in the method as described above, the correction parameters include offset parameters;

The determining the correction parameter of the original layer data includes:

Determine the conversion error corresponding to the position data of each pixel point of each slice layer according to the coordinate conversion relationship of the original layer data and the coordinate conversion result;

An offset parameter corresponding to the position data of each pixel point of each slice layer is determined according to the conversion error.

Further, in the above-mentioned method, the correction parameter corresponding to the position data of the pixel point is represented in the form of one or more pixels.

Further, in the above-mentioned method, the correction parameter corresponding to the position data of the pixel is expressed in the form of a fraction of the pixel;

Before performing the correction on the position data of each pixel point of each slice layer in the original layer data according to the correction parameter to obtain the corresponding target position data, the method further includes:

According to the correction parameter, the position area of each pixel point of each slice layer in the original layer data is divided into a plurality of position areas according to the proportion.

In a second aspect, an embodiment of the present application provides a data processing apparatus, including:

The data receiving module is used to receive the original layer data of the three-dimensional object to be printed;

a parameter determination module for determining the correction parameters of the original layer data;

a position correction module, configured to correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameter to obtain corresponding target position data;

The data determination module is used for determining the corrected layer data according to the target position data of each pixel point of each slice layer.

Further, in the device as described above, the correction parameter includes a layer shift parameter;

The parameter determination module is specifically used for: determining the overlapping point error corresponding to the position data of each pixel point of each slice layer according to the printing result of the three-dimensional printing device; determining the layer corresponding to the position data of each pixel point of each slice layer according to the overlapping point error shift parameter.

Further, in the above-mentioned device, the influencing factors of the stacking error include any one or more of the following factors:

Further, in the device as described above, the correction parameters include offset parameters;

The parameter determination module is specifically used for: determining the conversion error corresponding to the position data of each pixel point of each slice layer according to the coordinate conversion relationship of the original layer data and the coordinate conversion result; determining the position data of each pixel point of each slice layer according to the conversion error The corresponding offset parameter.

Further, in the above-mentioned apparatus, the correction parameter corresponding to the position data of the pixel point is represented in the form of one or more pixels.

Further, in the above-mentioned device, the correction parameter representation corresponding to the position data of the pixel point is represented in the form of a fraction of the pixel.

Further, the above-mentioned device, the area division module, is used for the position correction module to correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameter, so as to obtain the corresponding target position data, according to the correction parameter. parameter, divide the position area of each pixel of each slice layer in the original layer data into multiple position areas according to the proportion.

In a third aspect, an embodiment of the present application provides a data processing apparatus, including:

memory, processors and computer programs;

Wherein, the computer program is stored in the memory and configured to be executed by the processor to implement the method according to any one of the first aspects.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to implement the method according to any one of the first aspects.

In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which implements any one of the methods described in the first aspect when the computer program is executed by a processor.

In a sixth aspect, an embodiment of the present application provides a three-dimensional printing device, comprising: a receiving unit, a printing controller, and a printing unit, wherein the receiving unit is communicatively connected to the printing unit and the printing controller;

The receiving unit is configured to receive corrected layer data, where the corrected layer data is determined according to the target position data of each pixel point of each slice layer, and the target position data is based on the correction parameter to the original layer data. obtained after correcting the position data of each pixel point of each slice layer in the above, the original layer data is the original layer data of the three-dimensional object to be printed;

The printing controller is configured to control the printing unit to print a three-dimensional object according to the corrected layer data.

The embodiments of the present application provide a data processing method, device, storage medium, and three-dimensional printing device, by receiving original layer data of a three-dimensional object to be printed; determining correction parameters of the original layer data; The position data of each pixel point of the layer is corrected to obtain corresponding target position data; the corrected layer data is determined according to the target position data of each pixel point of each slice layer. Since the position of each pixel point of each slice layer is corrected, the ink point can be accurately ejected to the position of the theoretical pixel point, thereby improving the accuracy of three-dimensional printing.

It should be understood that the content described in the above summary section is not intended to limit the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become readily understood from the following description.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is an application scenario diagram of a data processing method provided by an embodiment of the present application;

2 is a flowchart of a data processing method provided by an embodiment of the present application;

3 is a flowchart of a data processing method provided by another embodiment of the present application;

4a is a schematic diagram of original layer data of a three-dimensional object to be printed and a corresponding printing layer provided by the application;

Fig. 4b is a schematic diagram of the corrected layer data and the printing layer corresponding to the original layer data of the three-dimensional object to be printed shown in Fig. 4a;

5a is a schematic diagram of original layer data of another three-dimensional object to be printed and a corresponding printing layer provided by the application;

Fig. 5b is a schematic diagram of the corrected layer data and the printing layer corresponding to the original layer data of the three-dimensional object to be printed shown in Fig. 5a;

FIG. 6 is a flowchart of a data processing method provided by yet another embodiment of the present application;

7a is a schematic diagram of still another original layer data of a three-dimensional object to be printed and a corresponding printing layer provided by the application;

7b is a schematic diagram of corrected layer data and a printing layer corresponding to the original layer data of the three-dimensional object to be printed shown in FIG. 7a;

FIG. 8 is a schematic structural diagram of a data processing apparatus provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a data processing apparatus provided by another embodiment of the present application;

FIG. 10 is a schematic structural diagram of a three-dimensional printing device provided by an embodiment of the application;

FIG. 11 is a schematic structural diagram of a three-dimensional printing apparatus according to another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In order to clearly understand the technical solutions of the present application, the solutions of the prior art are first introduced in detail.

In the prior art, during the actual printing movement of the 3D printer, due to the influence of one or more factors such as print head movement error, movement feedback delay, mechanical vibration, etc., there will be a certain stacking error during multi-layer printing. That is, the pixels of the latter layer should be printed in the same position as the previous layer in theory, and there will be deviations and sprayed to the nearby pixel positions. In addition, when the disc type 3D printer is used, since the current storage method of the layer data of the 3D slice is the storage method of rectangular coordinates, when the layer data of the 3D slice is applied to the disc type 3D printer, the position of the pixel point It is necessary to convert from the rectangular coordinate system to the polar coordinate system through the conversion relationship, but there will be corresponding conversion errors, that is, the ink dots cannot be accurately ejected to the theoretical pixel point position, resulting in jagged or slightly curved lines formed by the injection. Or the edges of the printed layer may appear jagged or slightly curved, etc.

Therefore, there is an error in the multi-layer printing in the prior art, and the ink dots cannot be accurately ejected to the positions of the theoretical pixel dots, which leads to the technical problem of low accuracy of the three-dimensional printing.

In view of the problems existing in the prior art, the inventor creatively found in the research that the correction parameters of the original layer data can be determined in a targeted manner according to the cause of the error formation, and then the correction parameters of each slice layer in the original layer data can be adjusted according to the correction parameters. The position data of the pixel points are corrected to obtain the corresponding target position data, and finally the corrected layer data is determined according to the target position data of each pixel point of each slice layer, so that the corrected layer data is used to print the three-dimensional object. The ink dots can be accurately ejected to the positions of theoretical pixel dots, thereby improving the accuracy of three-dimensional printing.

The inventor proposes the technical solution of the present application based on the above-mentioned inventive discovery. The following describes application scenarios of the data processing methods provided by the embodiments of the present application. As shown in FIG. 1 , the original layer data 1 of the three-dimensional object to be printed can be stored in the data storage device, and the data processing device 2 receives the original layer data 1 of the three-dimensional object to be printed from the data storage device, wherein the The original layer data 1 of the three-dimensional object includes original position data of each pixel of each slice layer of the three-dimensional object to be printed before printing. The data processing device 2 determines the correction parameters of the original layer data; corrects the position data of each pixel point of each slice layer in the original layer data according to the correction parameter, so as to obtain corresponding target position data; The target position data determines the corrected layer data 3 , and finally outputs the corrected layer data 3 . So that the three-dimensional printing device prints the three-dimensional object according to the corrected layer data. Since the position of each pixel point of each slice layer is corrected, the ink point can be accurately ejected to the position of the theoretical pixel point, thereby improving the accuracy of three-dimensional printing.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Example 1

FIG. 2 is a flowchart of a data processing method provided by an embodiment of the present application. As shown in FIG. 2 , the execution body of the data processing method provided by this embodiment is a data processing device, and the data processing method provided by this embodiment includes the following step:

Step 101: Receive original layer data of the three-dimensional object to be printed.

In this embodiment, when there is a printing requirement, the original layer data of the three-dimensional object to be printed can be generated, and the original layer data can be stored in the data storage device. Then the data processing device can communicate with the data storage device to obtain the original layer data of the three-dimensional object to be printed.

Wherein, the original layer data of the three-dimensional object to be printed includes the position data of each pixel of each slice layer, and the position data is the original position data.

Step 102: Determine the correction parameters of the original layer data.

In this embodiment, the influencing factors that cause errors in the printing of the original layer data are first determined, then the corresponding error types are determined according to the types of the influencing factors, and then the correction parameters of the original layer data are determined according to the error types.

Exemplarily, if the influencing factors that cause errors in the printing of original layer data are any one or more of print head motion accuracy error, motion feedback delay, and mechanical vibration, it means that the type of error is stack error, then according to stack error The point error determines the correction parameters of the original layer data including the layer shift parameters.

Or if the factor that causes the printing error of the original layer data is that when the original layer data is applied to a specific 3D printer, the position of the pixel needs to be converted from one coordinate system to another through a conversion relationship, such as a rectangular coordinate system. Converting to the polar coordinate system indicates that the error type is a conversion error, and then the correction parameters of the original layer data including the offset parameters are determined according to the conversion error.

It can be understood that both overlay errors and transformation errors may exist, and the correction parameters of the original layer data determined according to the overlay errors and transformation errors respectively may include layer shift parameters and offset parameters.

It can be understood that the correction parameter may be a correction parameter for the position data of each pixel point of each slice layer.

Step 103: Correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameter, so as to obtain corresponding target position data.

Specifically, in this embodiment, since the correction parameter is a correction parameter for the position data of each pixel point in each slice layer, after obtaining the position data of each pixel point in each slice layer in the original layer data, according to the The correction parameter is used to correct the position data of each pixel point in each slice layer, and the corrected position data of each pixel point is the corresponding target position data.

Step 104: Determine the corrected layer data according to the target position data of each pixel of each slice layer.

In this embodiment, the target position data of all the pixel points of each slice layer are acquired to form corresponding corrected slice layer data, and all corrected slice layer data are formed into corrected layer data.

In the data processing method provided by this embodiment, the original layer data of the three-dimensional object to be printed is received; the correction parameters of the original layer data are determined; and the position data of each pixel point of each slice layer in the original layer data is corrected according to the correction parameters, The corresponding target position data is obtained; the corrected layer data is determined according to the target position data of each pixel point of each slice layer. Since the position of each pixel point of each slice layer is corrected, the ink point can be accurately ejected to the position of the theoretical pixel point, thereby improving the accuracy of three-dimensional printing.

Optionally, in some embodiments, the correction parameter corresponding to the position data of the pixel point is represented in the form of one or more pixels.

Specifically, there is a corresponding correction parameter for the position of each pixel point, and the correction parameter can be expressed in the form of one or more pixels, such as the position of moving the pixel point to the left or right by one or more pixels , to get the corrected position of the pixel.

Optionally, in other embodiments, the correction parameter corresponding to the position data of the pixel point is expressed in the form of a fraction of the pixel.

Correspondingly, before correcting the position data of each pixel point of each slice layer in the original layer data according to the correction parameters to obtain the corresponding target position data, the method further includes:

According to the correction parameters, the position area of each pixel point of each slice layer in the original layer data is divided into a plurality of position areas according to the proportion.

In particular, it is difficult for the data processing apparatus to determine the position which is in the form of a fraction of a pixel. For example, it is difficult to determine where a pixel is shifted left or right by one-half, one-quarter, or four-thirds of a pixel. Therefore, before correcting the position data of each pixel point of each slice layer in the original layer data according to the correction parameter to obtain the corresponding target position data, the data processing device corrects the position data of each pixel point of each slice layer in the original layer data according to the correction parameter. The location area is proportionally divided into multiple location areas to provide more selectable locations for each pixel. For example, when the correction parameter is one-half of a pixel, the location area of each pixel in the original layer data can be divided into 4 locations with a size that is a quarter of the original location area of the pixel, so that the When the target position of each pixel point of the original layer data is determined, each pixel point may have more selectable positions to generate the corrected layer data.

Embodiment 2

FIG. 3 is a flowchart of a data processing method provided by another embodiment of the present application. As shown in FIG. 3 , the data processing method provided by this embodiment further refines step 102 on the basis of the embodiment shown in FIG. 2 , the correction parameter includes the layer shift parameter, and the existing error is the stacking error. Then the data processing method provided by this embodiment includes the following steps:

Step 201, receiving the original layer data of the three-dimensional object to be printed.

Exemplarily, in this embodiment, the received original layer data of the three-dimensional object to be printed may refer to FIG. 4a or FIG. 5a.

Among them, Fig. 4a includes the original layer data 41 and the corresponding printing layer 41'. Among them, the theory of the latter layer should be shifted to the right or left by one pixel position corresponding to the partial pixel dots printed in the same position of the previous layer.

Or as shown in Fig. 5a, the original layer data 51 and the corresponding printing layer are included as 51'. Among them, the theory of the latter layer should be shifted to the right or left by half of the pixel position corresponding to the partial pixel dots printed in the same position of the previous layer.

Step 202: Determine the stacking error corresponding to the position data of each pixel of each slice layer according to the printing result of the three-dimensional printing device.

Step 203: Determine the layer shift parameter corresponding to the position data of each pixel point of each slice layer according to the overlapping point error.

Optionally, in this embodiment, multiple printing results of the three-dimensional printing device are obtained, and for each printing result, the printing results of two adjacent printing layers are compared, and the pixel points in the two adjacent printing layers are determined. Overlay error of position data. Exemplarily, determine the overlapping point error between the position data of each pixel in the previous printing layer and the position data of each pixel in the current printing layer, and then determine the overlapping error as the position of each pixel in the current slicing layer. The overlay error corresponding to the data. In the same way, the overlapping point error corresponding to the position data of each pixel point of each slice layer is determined. Then, for the multiple printing results, the average value of the overlapping point error corresponding to the position data of each pixel point of each slice layer is calculated. The average value of the stacking error corresponding to the position data of each pixel of each slice layer is determined as the corresponding layer shift parameter.

Or alternatively, in this embodiment, the last printing result of the three-dimensional printing device is obtained, the stacking error of the position data of each pixel point of each slice layer is determined according to the last printing result, and the position data of each pixel point of each slice layer is determined. The stacking point error corresponding to the position data is determined as the corresponding layer shift parameter.

Wherein, the method of determining the overlapping point error of the position data of each pixel point of each slice layer for the last printing result is similar to the above-mentioned method of determining the overlapping point error of the position data of each pixel point of each slice layer for each printing result. This will not be repeated one by one.

Step 204: Correct the position data of each pixel point of each slice layer in the original layer data according to the layer shift parameter to obtain corresponding target position data.

Step 205: Determine the corrected layer data according to the target position data of each pixel of each slice layer.

In this embodiment, the position data of each pixel point of each slice layer in the original layer data is corrected according to the layer shift parameter to obtain the corresponding target position data, and the target position data of each pixel point of each slice layer is determined to be corrected. After the layer data is stored, the ink dots of the adjacent layers that theoretically fall at the same position actually fall at the same position, so that the overlap error is compensated in advance.

Among them, the influencing factors of the stacking error include any one or more of the following factors:

Print head motion accuracy error, motion feedback delay, and mechanical vibration.

Exemplarily, as shown in FIG. 4 b , the target position of each pixel point in the original layer data 41 is determined according to the layer shift parameter, so as to obtain the corrected layer data 42 . Compared with the original layer data 41, it can be seen that by determining the target position of each pixel in the original layer data 41, the positions of some pixels are shifted to the left by one pixel position, the positions of some pixels are shifted to the right by one pixel position, and the positions of some pixels are shifted to the right. The dot position remains unchanged, that is, the overlap error that occurs during printing is compensated in advance. Through the correction, the ink dots of the adjacent layers in the printing layer 42' corresponding to the corrected layer data 42 that theoretically fall at the same position actually fall at the same position.

It can be understood that when affected by one or more factors such as print head motion error, motion feedback delay, mechanical vibration, etc., the stacking error in multi-layer printing can be a pixel position as shown in Figure 4a, It can also be two or more pixel positions, and the corresponding layer shift parameter can also be expressed in the form of one or more pixels.

Or exemplarily, as shown in FIG. 5b, since the layer shift parameter is determined to be one-half pixel according to the average value of the overlapping point errors, the position area of each pixel in the original layer data 51 can be divided into proportions as follows: 4 areas whose size is one-fourth of the original position area of the pixel.

It can be understood that when the layer shift parameter is expressed as a fraction of other pixels, such as one-third, one-quarter pixel, etc., the position area of each pixel in the original layer data 51 can be determined according to the layer shift parameter. Divide into multiple location areas according to corresponding proportions.

Then, after obtaining the intermediate data 52 that provides more location areas, the target position of each pixel is determined, and the corrected layer data 53 is obtained. The position area of the pixel points is divided into multiple position areas according to the proportion, and then the target position of each pixel point is determined, which can compensate for the overlap error that will occur during printing in advance. The corrected layer data 53 corresponds to the printing layer 53' in the The theoretically co-located ink dots of adjacent layers actually co-locate.

It should be noted that there are many ways to determine the target position of each pixel, not limited to the one shown in Figure 5b, as long as the ink dots of the adjacent layers of the printing layer can theoretically be located in the same position. Actually fall in the same location.

Embodiment 3

FIG. 6 is a flowchart of a data processing method provided by still another embodiment of the present application. As shown in FIG. 6 , the data processing method provided by this embodiment further refines step 102 on the basis of the embodiment shown in FIG. 2 , the correction parameter includes the offset parameter, and the existing error is the conversion error. The data processing method provided in this embodiment is subsequently applied to a disc-type three-dimensional printing device. Then the data processing method provided by this embodiment includes the following steps:

Step 301, receiving the original layer data of the three-dimensional object to be printed.

In this embodiment, the storage method of the received original layer data of the three-dimensional object to be printed is the storage method of rectangular coordinates. During the process, certain conversion errors will occur, resulting in that the ink dots of the corresponding printing layer cannot be accurately ejected to the theoretical pixel position, and the edges of the printing layer may appear jagged or slightly curved. It can be understood that the positions of the pixel points can also be converted from the rectangular coordinate system to other specific coordinate systems through the conversion relationship.

Therefore, for example, in this embodiment, the received original layer data of the three-dimensional object to be printed may refer to FIG. 7a. Among them, Fig. 7a includes the original layer data 71 and the corresponding printing layer 71'

Step 302: Determine the conversion error corresponding to the position data of each pixel point of each slice layer according to the coordinate conversion relationship of the original layer data and the coordinate conversion result.

Step 303: Determine the offset parameter corresponding to the position data of each pixel point of each slice layer according to the conversion error.

In this embodiment, since the coordinate conversion relationship of the original layer data is from the rectangular coordinate system to the polar coordinate system, it can be determined from the printing result of the conversion of the original layer data from the rectangular coordinate system to the polar coordinate system. The conversion error corresponding to the position data of each pixel point of each slice layer is determined, and the conversion error corresponding to the position data of each pixel point of each slice layer is determined as the corresponding offset parameter.

Exemplarily, as shown in Fig. 7a, the positions of some pixel points in the original layer data 71 are shifted to the right by one-half pixel position, and the positions of some pixel points are shifted to the left by one-half pixel position. Therefore, in the case of ignoring the overlap error, the ink dot positions corresponding to some pixels in the printing layer 71 ′ corresponding to the original layer data 71 are shifted to the right by half a pixel position, and the ink dot positions corresponding to some pixels are left Moved one-half pixel position. Therefore, the offset parameter corresponding to the position data of each pixel in the printing layer is a partial left-shift or a right-shift half of the pixel position.

Therefore, before correcting the position data of each pixel point of each slice layer in the original layer data according to the offset parameter to obtain the corresponding target position data, according to the offset parameter, each pixel point of each slice layer in the original layer data is corrected. The location area of is proportionally divided into multiple location areas.

Exemplarily, as shown in FIG. 7b, since the offset parameter determined according to the conversion error is one-half pixel, the original position area of each pixel in the original layer data 71 can be divided into 4 sizes according to the proportion. It is a quarter of the original location area of the pixel.

Step 304: Correct the position data of each pixel point of each slice layer in the original layer data according to the offset parameter to obtain corresponding target position data.

Step 305: Determine the corrected layer data according to the target position data of each pixel of each slice layer.

As shown in Figure 7b, after obtaining the intermediate data 72 that provides more location areas, the target position of each pixel is determined, and the corrected layer data 73 is obtained. Compared with the original layer data 71, it can be seen that the original layer The position area of each pixel in the data 71 is divided into a plurality of position areas according to the proportion, and then the target position of each pixel is determined, and the conversion error caused by the coordinate system conversion is compensated, and the corrected layer data 73 corresponds to the printing layer. The dot positions in 73' do not shift.

It should be noted that there are many ways to determine the target position of each pixel, not limited to the one shown in Figure 7b, as long as the position of the ink dots in the printing layer does not shift, and the edges of the printing layer are smooth. Can.

It can be understood that, in this embodiment, the data processing of the original layer data is carried out under the condition of ignoring the overlapping point error. In other embodiments that simultaneously consider the overlapping point error and the conversion error, when processing the original layer data, The original layer data is corrected in combination with the layer shift parameter and the offset parameter, and the modification method is easy to understand in combination with the above embodiment, so it is not repeated here.

Embodiment 4

FIG. 8 is a schematic structural diagram of a data processing apparatus according to an embodiment of the present application. As shown in FIG. 8 , the data processing device 80 provided in this embodiment includes: a data receiving module 81, a parameter determining module 82, a position correction module 83 and a data determining module 84.

Among them, the data receiving module 81 is used to receive the original layer data of the three-dimensional object to be printed. The parameter determination module 82 is used for determining correction parameters of the original layer data. The position correction module 83 is configured to correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameters, so as to obtain corresponding target position data. The data determination module 84 is configured to determine the corrected layer data according to the target position data of each pixel point of each slice layer.

Wherein, an interface may be included in the data receiving module, and the interface is used for communication connection between the data storage device and the data processing apparatus.

It can be understood that the parameter determination module 82, the position correction module 83 and the data determination module 84 can be integrated into a correction unit.

The data processing apparatus provided in this embodiment can execute the technical solution of the method embodiment shown in FIG. 2 , and the implementation principle and technical effect thereof are similar, and are not repeated here.

Optionally, the correction parameters include layer shift parameters.

Correspondingly, the parameter determination module 82 is specifically configured to: determine the overlapping point error corresponding to the position data of each pixel point of each slice layer according to the printing result of the three-dimensional printing device; determine the position of each pixel point of each slice layer according to the overlapping point error The layer shift parameter corresponding to the data.

Or alternatively, the correction parameters include offset parameters.

Correspondingly, the parameter determination module 82 is specifically configured to: determine the conversion error corresponding to the position data of each pixel point of each slice layer according to the coordinate conversion relationship of the original layer data and the coordinate conversion result; determine each pixel of each slice layer according to the conversion error The offset parameter corresponding to the position data of the point.

Optionally, in this embodiment, the correction parameter corresponding to the position data of the pixel point is represented in the form of one or more pixels.

Or optionally, in this embodiment, the correction parameter corresponding to the position data of the pixel point is expressed in the form of a fraction of the pixel.

Correspondingly, it also includes: a region division module, used for the position correction module 83 to correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameter, so as to obtain the corresponding target position data, according to the correction parameter, The location area of each pixel point of each slice layer in the original layer data is divided into multiple location areas according to the proportion.

The data processing apparatus provided in this embodiment can implement the technical solutions of the method embodiments shown in FIG. 3 and FIG. 6 , and the implementation principles and technical effects thereof are similar, and are not repeated here.

Embodiment 5

FIG. 9 is a schematic structural diagram of a data processing apparatus provided by another embodiment of the present application. As shown in FIG. 9 , the data processing apparatus 90 in the embodiment of the present application includes: a memory 91 , a processor 92 and a computer program.

The computer program is stored in the memory 91 and configured to be executed by the processor 92 to implement the data processing method provided by the embodiments of the present application.

The related descriptions can be understood by referring to the related descriptions and effects corresponding to the steps in FIG. 2 , FIG. 3 , and FIG. 6 , and details are not repeated here.

Among them, in this embodiment, the memory 91 and the processor 92 are connected through a bus.

The memory can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only Memory, PROM), erasable only memory Read memory (Erasable Programmable Read-Only Memory, EPROM), Electrically Erasable Programmable Read-Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), Flash Memory (Flash Memory), etc. The memory is also used to store the program, and the processor executes the program after receiving the execution instruction.

A processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), and the like. It may also be a digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Those skilled in the art should understand that the data processing apparatus of the present application includes a memory and a processor, where the memory is used for storing program instruction codes, and the processor is used for executing the program instruction codes to implement the data processing methods in the above embodiments. The embodiments of the present application may be provided as methods, apparatuses, or computer program products. Accordingly, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Embodiment 6

Embodiment 6 of the present application provides a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to implement the data processing method proposed in any one of the above method embodiments.

Embodiment 7

FIG. 10 is a schematic structural diagram of a three-dimensional printing apparatus provided by an embodiment of the present application. As shown in FIG. 10 , the three-dimensional printing apparatus 1000 provided by an embodiment of the present application includes: a receiving unit 1001 , a printing controller 1002 , and a printing unit 1003 . The receiving unit 1001 and the printing unit 1003 are connected in communication with the printing controller 1002 .

The receiving unit 1001 is used for receiving corrected layer data, the corrected layer data is determined according to the target position data of each pixel point of each slice layer, and the target position data is the correction parameter for each slice in the original layer data according to the correction parameter. The position data of each pixel point of the layer is obtained after correction, and the original layer data is the original layer data of the three-dimensional object to be printed;

The printing controller 1002 is configured to control the printing unit 1003 to print the three-dimensional object according to the corrected layer data.

Among other things, the print controller 1002 may include at least one processor that forms part of, for example, an embedded computing device for controlling an additive manufacturing system.

In this embodiment, the corrected layer data may be the corrected layer data determined in any one of the embodiments in FIG. 2 , FIG. 3 , and FIG. 6 , and details are not repeated here.

Embodiment 8

FIG. 11 is a schematic structural diagram of a three-dimensional printing apparatus provided by another embodiment of the present application. As shown in FIG. 11 , the three-dimensional printing apparatus 1100 provided by this embodiment further includes a memory 1004 on the basis of the three-dimensional printing apparatus 1000 provided in FIG. 10 . .

Memory 1004 may include volatile and/or nonvolatile memory, such as a non-transitory storage medium, configured to store computer program code, eg, in the form of firmware. Firmware may include machine-readable instructions and/or executable code including instructions for at least one processor. Printing controller 1002 is communicatively coupled to printing unit 1003 . The printing unit 1003 can eject printing material to produce a three-dimensional object. Printing unit 1003 includes print heads 103a, 103b, 103c. In other cases, printing unit 1003 may include more or fewer or additional components, and printing unit 1003 may also eject one or more materials.

Optionally, the 3D printing apparatus 1100 further includes a printing platform 1005 , and the printing controller 1002 controls the printing heads 103 a , 103 b , 103 c to eject materials on the printing platform 1005 , and the materials are stacked layer by layer to generate the 3D object 1006 .

It should be noted that this embodiment does not limit the arrangement and shape of the unit modules and components shown in FIG. 11 , and the precise arrangement and shape of each component will vary according to the implemented production technology and the specific structure of the printing apparatus.

The embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A data processing method, comprising:

Receive raw layer data of the 3D object to be printed;

determining the correction parameters of the original layer data;

Correcting the position data of each pixel of each slice layer in the original layer data according to the correction parameter to obtain corresponding target position data;

The corrected layer data is determined according to the target position data of each pixel of each slice layer.
The method according to claim 1, wherein the correction parameter comprises a layer shift parameter;

The determining the correction parameter of the original layer data includes:

Determine the overlap error corresponding to the position data of each pixel of each slice layer according to the printing result of the three-dimensional printing device;

A layer shift parameter corresponding to the position data of each pixel point of each slice layer is determined according to the overlapping point error.
The method according to claim 2, wherein the influencing factors of the stacking error include any one or more of the following factors:

Printing head movement accuracy error, printing head movement feedback delay, and mechanical vibration of 3D printing device.
The method of claim 1, wherein the correction parameters comprise offset parameters;

The determining the correction parameter of the original layer data includes:

Determine the conversion error corresponding to the position data of each pixel point of each slice layer according to the coordinate conversion relationship of the original layer data and the coordinate conversion result;

An offset parameter corresponding to the position data of each pixel point of each slice layer is determined according to the conversion error.
The method according to any one of claims 1-4, wherein the correction parameter corresponding to the position data of the pixel point is represented in the form of one or more pixels.
The method according to any one of claims 1-4, wherein the correction parameters corresponding to the position data of the pixel points are expressed in the form of fractions of pixels;

The position data of each pixel point of each slice layer in the original layer data is corrected according to the correction parameter, before obtaining the corresponding target position data, it also includes:

According to the correction parameter, the position area of each pixel point of each slice layer in the original layer data is divided into a plurality of position areas according to the proportion.
A data processing device, comprising:

The data receiving module is used to receive the original layer data of the three-dimensional object to be printed;

a parameter determination module for determining the correction parameters of the original layer data;

a position correction module, configured to correct the position data of each pixel point of each slice layer in the original layer data according to the correction parameter to obtain corresponding target position data;

The data determination module is used for determining the corrected layer data according to the target position data of each pixel point of each slice layer.
A data processing device, comprising:

memory, processors and computer programs;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of claims 1-6.
A computer-readable storage medium, characterized in that a computer program is stored thereon, and the computer program is executed by a processor to implement the method according to any one of claims 1-6.
A computer program product, comprising a computer program, characterized in that, when the computer program is executed by a processor, the method of any one of claims 1-6 is implemented.
A three-dimensional printing device, comprising: a receiving unit, a printing controller and a printing unit, wherein the receiving unit is connected to the printing unit in communication with the printing controller;

The receiving unit is configured to receive corrected layer data, where the corrected layer data is determined according to the target position data of each pixel point of each slice layer, and the target position data is based on the correction parameter to the original layer data. obtained after correcting the position data of each pixel point of each slice layer in the above, the original layer data is the original layer data of the three-dimensional object to be printed;

The printing controller is configured to control the printing unit to print a three-dimensional object according to the corrected layer data.