Online inkjet printing system and method for gypsum board

Abstract

The present application relates to the field of printing technology, and in particular to an online printing system and method for gypsum boards, the system comprising: an acquisition module for acquiring a speed measurement signal of an encoder, and calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal; a trigger module for determining the moving position according to the moving speed of the gypsum board to be sprayed, and when the moving position of the gypsum board to be sprayed is at a preset position, sending a cutter signal to the gypsum board to be sprayed and triggering a coding instruction; an inspection module for inspecting the printing result of the gypsum board to be sprayed and calculating the printing evaluation degree of the gypsum board to be sprayed, and correcting the coding speed and coding frequency according to the printing evaluation degree. The present invention solves the technical problem that the printing system always needs to be manually repositioned due to changes in the production line speed, which is not only time-consuming and labor-intensive, but also reduces the printing effect.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to an online printing system and method for gypsum boards. Background Art

[0002] The gypsum board printing system is a device for printing trademarks and model information on formed gypsum boards. After the gypsum boards are produced and formed, trademarks, models and other information need to be printed on the surface of the gypsum boards. The clarity of the printed words or patterns is an important criterion for measuring the application performance of the gypsum board printing system.

[0003] In the prior art, the change of production line speed always requires manual repositioning of the printing system, which is not only time-consuming and labor-intensive, but also reduces the printing effect. Therefore, how to position the printing system according to the production line speed and improve the printing effect is a problem that needs to be solved at present. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides an online gypsum board printing system and method, which aims to position the printing system in real time according to the production line speed, print at a preset position, and improve the printing effect.

[0005] In some embodiments of the present application, the speed measurement signal of the encoder is collected, and the movement speed and position of the gypsum board to be sprayed are obtained according to the speed measurement signal. The encoder is connected to the production line motor. When the production line speed changes, the movement speed and position of the gypsum board to be sprayed change accordingly. When the gypsum board to be sprayed moves to a preset position, the cutter starts working. After the cutter moves, it will trigger the inkjet signal of the printing system, and the inkjet printer starts to spray code, which solves the problem that changes in the production line speed always require manual repositioning of the printing system. There is no need for manual positioning, which reduces the waste of manpower and resources.

[0006] In some embodiments of the present application, the gypsum board after coding is inspected and the printing evaluation degree is calculated, the coding speed and the coding frequency are corrected according to the printing evaluation degree, and the corrected printing evaluation degree is calculated. If the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, an alarm signal is sent and the coding operation is stopped, which greatly improves the printing effect of the printing operation of the printing system.

[0007] In some embodiments of the present application, a gypsum board online printing system is provided, comprising:

[0008] An acquisition module is used to acquire a speed measurement signal of an encoder and calculate a moving speed of the gypsum board to be sprayed according to the speed measurement signal;

[0009] A trigger module is used to determine the moving position according to the moving speed of the gypsum board to be sprayed, and when the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered;

[0010] The inspection module is used to inspect the printing results of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and to correct the coding speed and coding frequency according to the printing evaluation degree.

[0011] In some embodiments of the present application, calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal includes:

[0012] The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method;

[0013] The calculation formula of the moving speed is:

[0014]

[0015] Among them, v is the moving speed, T is the clock frequency, M n is the pulse quantity, M t is the clock pulse, and K is the resolution of the encoder.

[0016] In some embodiments of the present application, the trigger module is further used to obtain the required length of the coding data corresponding to the coding instruction, determine the coding time corresponding to the current coding data according to the required length of the coding data and the movement speed, and determine the delay time for triggering the coding instruction according to the coding time;

[0017] The trigger module is pre-set with a first preset coding time, a second preset coding time and a third preset coding time; and is also pre-set with a first preset delay time, a second preset delay time and a third preset delay time;

[0018] When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction;

[0019] When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction;

[0020] When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction;

[0021] The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

[0022] In some embodiments of the present application, checking the printing result of the coding gypsum board and calculating the printing evaluation degree of the coding gypsum board include:

[0023] The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity;

[0024] The calculation formula of the printing evaluation degree is:

[0025]

[0026] Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clarity value, F3 is the influence weight corresponding to the clarity value, N4 is the unpredictable value, and X is a preset constant.

[0027] In some embodiments of the present application, the coding speed and coding frequency are corrected according to the printing evaluation degree, including:

[0028] The inspection module is used to pre-set a preset printing evaluation threshold, select a corresponding correction coefficient to correct the coding speed and coding frequency according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, and set the first speed correction coefficient, the second speed correction coefficient, the first frequency correction coefficient, the second frequency correction coefficient, the first preset difference and the second preset difference according to the historical printing data;

[0029] When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time;

[0030] When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree;

[0031] When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency;

[0032] When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency;

[0033] Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

[0034] In some embodiments of the present application, a gypsum board online printing method is also included:

[0035] Collecting the speed measurement signal of the encoder, and calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal;

[0036] The moving position is determined according to the moving speed of the gypsum board to be sprayed. When the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered, wherein the coding instruction includes a coding speed and a coding frequency;

[0037] Check the printing results of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and correct the coding speed and coding frequency according to the printing evaluation degree.

[0038] In some embodiments of the present application, calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal includes:

[0039] The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method;

[0040] The calculation formula of the moving speed is:

[0041]

[0042] Among them, v is the moving speed, T is the clock frequency, M n is the pulse quantity, M t is the clock pulse, and K is the resolution of the encoder.

[0043] In some embodiments of the present application, the required length of the coding data corresponding to the coding instruction is obtained, the coding time corresponding to the current coding data is determined according to the required length of the coding data and the movement speed, and the delay time for triggering the coding instruction is determined according to the coding time;

[0044] A first preset coding time, a second preset coding time and a third preset coding time are preset; a first preset delay time, a second preset delay time and a third preset delay time are also preset;

[0045] When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction;

[0046] When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction;

[0047] When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction;

[0048] The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

[0049] In some embodiments of the present application, checking the printing result of the coding gypsum board and calculating the printing evaluation degree of the coding gypsum board include:

[0050] The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity;

[0051] The calculation formula of the printing evaluation degree is:

[0052]

[0053] Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clarity value, F3 is the influence weight corresponding to the clarity value, N4 is the unpredictable value, and X is a preset constant.

[0054] In some embodiments of the present application, the coding speed and coding frequency are corrected according to the printing evaluation degree, including:

[0055] A preset printing evaluation threshold is pre-set, and according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, a corresponding correction coefficient is selected to correct the coding speed and the coding frequency, and a first speed correction coefficient, a second speed correction coefficient, a first frequency correction coefficient, a second frequency correction coefficient, a first preset difference, and a second preset difference are set according to historical printing data;

[0056] When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time;

[0057] When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree;

[0058] When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency;

[0059] When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency;

[0060] Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

[0061] Compared with the prior art, the gypsum board online printing system and method of the present application embodiment has the following beneficial effects:

[0062] The speed measurement signal of the encoder is collected, and the speed and position of the gypsum board to be sprayed are obtained according to the speed measurement signal. The encoder is connected to the motor of the production line. When the speed of the production line changes, the speed and position of the gypsum board to be sprayed change accordingly. When the gypsum board to be sprayed moves to the preset position, the cutter starts working. After the cutter moves, it will trigger the inkjet signal of the printing system, and the inkjet printer starts to spray code. This solves the problem that the change of production line speed always requires manual repositioning of the printing system. There is no need for manual positioning, which reduces the waste of manpower and resources.

[0063] The gypsum board after coding is inspected and the printing evaluation degree is calculated. The coding speed and coding frequency are corrected according to the printing evaluation degree, and the corrected printing evaluation degree is calculated. If the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, an alarm signal is sent and the coding operation is stopped, which greatly improves the printing effect of the printing system's printing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 is a schematic diagram of a gypsum board online printing system in a preferred embodiment of the present application;

[0065] Figure 2 It is a flow chart of the online printing method of gypsum board in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0066] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0067] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0068] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0069] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] like Figure 1 As shown, the gypsum board online printing system of the preferred embodiment of the present application includes:

[0071] An acquisition module is used to acquire a speed measurement signal of an encoder and calculate a moving speed of the gypsum board to be sprayed according to the speed measurement signal;

[0072] A trigger module is used to determine the moving position according to the moving speed of the gypsum board to be sprayed, and when the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered;

[0073] The inspection module is used to inspect the printing results of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and to correct the coding speed and coding frequency according to the printing evaluation degree.

[0074] In some embodiments of the present application, calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal includes:

[0075] The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method;

[0076] The calculation formula of the moving speed is:

[0077]

[0078] Among them, v is the moving speed, T is the clock frequency, M n is the pulse quantity, M t is the clock pulse, and K is the resolution of the encoder.

[0079] In this embodiment, the principle of variable M / T speed measurement is to change the fixed sampling time into a non-fixed sampling period based on the M / T method, that is, in the speed measurement process, not only the pulse quantity and clock pulse change with the motor speed, but also the speed measurement time interval changes. Therefore, this method is suitable for the scene of production line speed changes, without manual positioning, reducing the waste of manpower and resources.

[0080] In some embodiments of the present application, the trigger module is further used to obtain the required length of the coding data corresponding to the coding instruction, determine the coding time corresponding to the current coding data according to the required length of the coding data and the movement speed, and determine the delay time for triggering the coding instruction according to the coding time;

[0081] The trigger module is pre-set with a first preset coding time, a second preset coding time and a third preset coding time; and is also pre-set with a first preset delay time, a second preset delay time and a third preset delay time;

[0082] When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction;

[0083] When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction;

[0084] When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction;

[0085] The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

[0086] In this embodiment, when the cutter signal triggers the coding instruction, the time required for coding is not taken into account. The coding time is related to the movement speed. The delay time for triggering the coding instruction is determined according to the coding time, thereby reducing the preset position deviation and improving the printing effect.

[0087] In some embodiments of the present application, checking the printing result of the coding gypsum board and calculating the printing evaluation degree of the coding gypsum board include:

[0088] The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity;

[0089] The calculation formula of the printing evaluation degree is:

[0090]

[0091] Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clarity value, F3 is the influence weight corresponding to the clarity value, N4 is the unpredictable value, and X is a preset constant.

[0092] In this embodiment, the printing results are evaluated according to the printing evaluation degree and the coding speed and coding frequency are corrected, which greatly improves the printing effect of the printing system. If the corrected printing evaluation degree does not reach the preset printing evaluation degree threshold, the printing operation is stopped and the printing system is repaired to ensure the printing effect of the printing system.

[0093] In some embodiments of the present application, the coding speed and coding frequency are corrected according to the printing evaluation degree, including:

[0094] The inspection module is used to pre-set a preset printing evaluation threshold, select a corresponding correction coefficient to correct the coding speed and coding frequency according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, and set the first speed correction coefficient, the second speed correction coefficient, the first frequency correction coefficient, the second frequency correction coefficient, the first preset difference and the second preset difference according to the historical printing data;

[0095] When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time;

[0096] When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree;

[0097] When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency;

[0098] When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency;

[0099] Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

[0100] In this embodiment, a first speed correction coefficient, a second speed correction coefficient, a first frequency correction coefficient, a second frequency correction coefficient, a first preset difference, and a second preset difference are set according to historical printing data, wherein the historical printing data includes the optimal coding speed and coding frequency corresponding to the evaluation difference, thereby setting the speed correction coefficient and the frequency correction coefficient, thereby improving the accuracy of the printing results and the printing effect.

[0101] In some embodiments of the present application, Figure 2 As shown, it also includes the gypsum board online printing method:

[0102] Step S201: collecting a speed measurement signal of an encoder, and calculating a moving speed of the gypsum board to be sprayed according to the speed measurement signal;

[0103] Step S202: determining the moving position according to the moving speed of the gypsum board to be sprayed, and when the moving position of the gypsum board to be sprayed is at a preset position, sending a cutting signal to the gypsum board to be sprayed and triggering a coding instruction, wherein the coding instruction includes a coding speed and a coding frequency;

[0104] Step S203: Check the printing result of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and correct the coding speed and coding frequency according to the printing evaluation degree.

[0105] In some embodiments of the present application, calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal includes:

[0106] The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method;

[0107] The calculation formula of the moving speed is:

[0108]

[0109] Among them, v is the moving speed, T is the clock frequency, M n is the pulse quantity, M t is the clock pulse, and K is the resolution of the encoder.

[0110] In this embodiment, the principle of variable M / T speed measurement is to change the fixed sampling time into a non-fixed sampling period based on the M / T method, that is, in the speed measurement process, not only the pulse quantity and clock pulse change with the motor speed, but also the speed measurement time interval changes. Therefore, this method is suitable for the scene of production line speed changes, without manual positioning, reducing the waste of manpower and resources.

[0111] In some embodiments of the present application, the required length of the coding data corresponding to the coding instruction is obtained, the coding time corresponding to the current coding data is determined according to the required length of the coding data and the movement speed, and the delay time for triggering the coding instruction is determined according to the coding time;

[0112] A first preset coding time, a second preset coding time and a third preset coding time are preset; a first preset delay time, a second preset delay time and a third preset delay time are also preset;

[0113] When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction;

[0114] When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction;

[0115] When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction;

[0116] The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

[0117] In this embodiment, when the cutter signal triggers the coding instruction, the time required for coding is not taken into account. The coding time is related to the movement speed. The delay time for triggering the coding instruction is determined according to the coding time, thereby reducing the preset position deviation and improving the printing effect.

[0118] In some embodiments of the present application, checking the printing result of the coding gypsum board and calculating the printing evaluation degree of the coding gypsum board include:

[0119] The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity;

[0120] The calculation formula of the printing evaluation degree is:

[0121]

[0122] Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clarity value, F3 is the influence weight corresponding to the clarity value, N4 is the unpredictable value, and X is a preset constant.

[0123] In this embodiment, the printing results are evaluated according to the printing evaluation degree and the coding speed and coding frequency are corrected, which greatly improves the printing effect of the printing system. If the corrected printing evaluation degree does not reach the preset printing evaluation degree threshold, the printing operation is stopped and the printing system is repaired to ensure the printing effect of the printing system.

[0124] In some embodiments of the present application, the coding speed and coding frequency are corrected according to the printing evaluation degree, including:

[0125] A preset printing evaluation threshold is pre-set, and according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, a corresponding correction coefficient is selected to correct the coding speed and the coding frequency, and a first speed correction coefficient, a second speed correction coefficient, a first frequency correction coefficient, a second frequency correction coefficient, a first preset difference, and a second preset difference are set according to historical printing data;

[0126] When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time;

[0127] When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree;

[0128] When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency;

[0129] When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency;

[0130] Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

[0131] In this embodiment, a first speed correction coefficient, a second speed correction coefficient, a first frequency correction coefficient, a second frequency correction coefficient, a first preset difference, and a second preset difference are set according to historical printing data, wherein the historical printing data includes the optimal coding speed and coding frequency corresponding to the evaluation difference, thereby setting the speed correction coefficient and the frequency correction coefficient, thereby improving the accuracy of the printing results and the printing effect.

[0132] In summary, the present invention discloses an online printing system and method for gypsum boards, which system includes: an acquisition module, used to acquire a speed measurement signal of an encoder, and calculate the moving speed of the gypsum board to be sprayed according to the speed measurement signal; a trigger module, used to determine the moving position according to the moving speed of the gypsum board to be sprayed, when the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered; a verification module, used to verify the printing result of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and correct the coding speed and coding frequency according to the printing evaluation degree.

[0133] According to the first concept of the present application, the speed measurement signal of the encoder is collected, and the movement speed and position of the gypsum board to be sprayed are obtained according to the speed measurement signal. The encoder is connected to the motor of the production line. When the speed of the production line changes, the movement speed and position of the gypsum board to be sprayed change accordingly. When the gypsum board to be sprayed moves to the preset position, the cutter works. After the cutter moves, it will trigger the inkjet signal of the printing system, and the inkjet printer starts to spray code. This solves the problem that changes in the production line speed always require manual repositioning of the printing system. There is no need for manual positioning, which reduces the waste of manpower and resources.

[0134] According to the second concept of the present application, the gypsum board after coding is inspected and the printing evaluation degree is calculated, the coding speed and coding frequency are corrected according to the printing evaluation degree, and the corrected printing evaluation degree is calculated. If the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, an alarm signal is sent and the coding operation is stopped, which greatly improves the printing effect of the printing system's printing operation.

[0135] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. Gypsum board online printing system, characterized in that: include: An acquisition module is used to acquire a speed measurement signal of an encoder and calculate a moving speed of the gypsum board to be sprayed according to the speed measurement signal; A trigger module is used to determine the moving position according to the moving speed of the gypsum board to be sprayed, and when the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered; The inspection module is used to inspect the printing result of the coding gypsum board and calculate the printing evaluation degree of the coding gypsum board, and to correct the coding speed and coding frequency according to the printing evaluation degree; Check the printing results of the coded gypsum board and calculate the printing evaluation of the coded gypsum board, including: The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity; The calculation formula of the printing evaluation degree is: Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clear value, F3 is the influence weight corresponding to the clear value, N4 is the unpredictable value, and X is a preset constant; Modify the coding speed and coding frequency according to the printing evaluation degree, including: The inspection module is used to pre-set a preset printing evaluation threshold, select a corresponding correction coefficient to correct the coding speed and coding frequency according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, and set the first speed correction coefficient, the second speed correction coefficient, the first frequency correction coefficient, the second frequency correction coefficient, the first preset difference and the second preset difference according to the historical printing data; When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time; When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree; When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency; When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency; Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

2. The gypsum board online printing system according to claim 1, characterized in that: Calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal includes: The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method; The calculation formula of the moving speed is: Where v is the moving speed, T is the clock frequency, is the pulse amount, is the clock pulse, and K is the resolution of the encoder.

3. The gypsum board online printing system according to claim 2, characterized in that: The trigger module is also used to obtain the required length of the coding data corresponding to the coding instruction, determine the coding time corresponding to the current coding data according to the required length of the coding data and the movement speed, and determine the delay time for triggering the coding instruction according to the coding time; The trigger module is pre-set with a first preset coding time, a second preset coding time and a third preset coding time; and is also pre-set with a first preset delay time, a second preset delay time and a third preset delay time; When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction; When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction; When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction; The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

4. Gypsum board online printing method, characterized in that: include: Collecting the speed measurement signal of the encoder, and calculating the moving speed of the gypsum board to be sprayed according to the speed measurement signal; The moving position is determined according to the moving speed of the gypsum board to be sprayed. When the moving position of the gypsum board to be sprayed is at a preset position, a cutting signal is sent to the gypsum board to be sprayed and a coding instruction is triggered, wherein the coding instruction includes a coding speed and a coding frequency; Check the printing results of the coded gypsum board and calculate the printing evaluation degree of the coded gypsum board, and correct the coding speed and coding frequency according to the printing evaluation degree; Check the printing results of the coded gypsum board and calculate the printing evaluation of the coded gypsum board, including: The printing result includes the printing position deviation, printing integrity and printing clarity, and the corresponding position deviation value, integrity value and clarity value are determined according to the printing position deviation, printing integrity and printing clarity; The calculation formula of the printing evaluation degree is: Among them, Y is the printing evaluation degree, N1 is the position deviation value, F1 is the influence weight corresponding to the position deviation value, N2 is the complete value, F2 is the influence weight corresponding to the complete value, N3 is the clear value, F3 is the influence weight corresponding to the clear value, N4 is the unpredictable value, and X is a preset constant; Modify the coding speed and coding frequency according to the printing evaluation degree, including: A preset printing evaluation threshold is pre-set, and according to the relationship between the printing evaluation degree and the preset printing evaluation threshold, a corresponding correction coefficient is selected to correct the coding speed and the coding frequency, and a first speed correction coefficient, a second speed correction coefficient, a first frequency correction coefficient, a second frequency correction coefficient, a first preset difference, and a second preset difference are set according to historical printing data; When the inkjet printing evaluation degree is greater than or equal to the preset inkjet printing evaluation degree threshold, the inkjet printing speed and inkjet printing frequency are not corrected, the number of inspections of inkjet printing gypsum boards is increased, and the inkjet printing evaluation degree is updated in real time; When the printing evaluation degree is less than a preset printing evaluation degree threshold, calculating the evaluation degree difference between the preset printing evaluation degree threshold and the printing evaluation degree; When the evaluation degree difference is less than the first preset difference, a first speed correction coefficient is selected to correct the current inkjet speed, and a first frequency correction coefficient is selected to correct the current inkjet frequency; When the evaluation degree difference is between the first preset difference and the second preset difference, the second speed correction coefficient is selected to correct the current inkjet speed, and the second frequency correction coefficient is selected to correct the current inkjet frequency; Generate a new coding instruction according to the corrected coding speed and coding frequency, obtain the printed gypsum board corresponding to the new coding instruction, calculate the corrected printing evaluation degree, and if the corrected printing evaluation degree is less than the preset printing evaluation degree threshold, send an alarm signal and stop the coding operation.

5. The method for online printing of gypsum board according to claim 4, wherein the moving speed of the gypsum board to be sprayed is calculated according to the speed measurement signal, comprising: The speed measurement signal includes the pulse quantity and clock pulse of the encoder, and the moving speed of the gypsum board to be sprayed is calculated according to the preset M / T method; The calculation formula of the moving speed is: Where v is the moving speed, T is the clock frequency, is the pulse amount, is the clock pulse, and K is the resolution of the encoder.

6. The gypsum board online printing method according to claim 5, characterized in that: Obtain the required length of the coding data corresponding to the coding instruction, determine the coding time corresponding to the current coding data according to the required length of the coding data and the movement speed, and determine the delay time for triggering the coding instruction according to the coding time; A first preset coding time, a second preset coding time and a third preset coding time are preset; a first preset delay time, a second preset delay time and a third preset delay time are also preset; When the coding time is between the first preset coding time and the second preset coding time, the first preset delay time is selected as the delay time for triggering the coding instruction; When the coding time is between the second preset coding time and the third preset coding time, the second preset delay time is selected as the delay time for triggering the coding instruction; When the coding time is greater than the third preset coding time, the third preset delay time is selected as the delay time for triggering the coding instruction; The moving position is determined according to the moving speed v of the gypsum board to be sprayed and the real-time position x0 of the gypsum board to be sprayed, and the moving position is x0+vt. When x0+vt is in the preset position, a cutting signal is sent to the gypsum board to be sprayed and the first preset delay time, the second preset delay time or the third preset delay time is selected to delay the triggering of the coding instruction.

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