Printing device with chromatic aberration distinguishing function and method thereof

Abstract

The invention discloses a printing device capable of distinguishing chromatic aberration and a method thereof, and belongs to the technical field of printing. A printing device capable of distinguishing chromatic aberration comprises at least one chromatic aberration detector and a brush head, and a pressure adjusting assembly is integrated on the brush head. Wherein a first piezoelectric material and a second piezoelectric material are installed in the brush head, the first piezoelectric material is used for making contact with the pressure adjusting assembly to convert mechanical pressure into electric signals, and the second piezoelectric material is used for receiving current signals and generating deformation. The acquired color data is transmitted to the signal processing unit, and the pressure of the brush head on the paper is adjusted in real time through the pressure adjusting assembly, so that the whole system forms a closed-loop control loop from color detection, pressure sensing to ink jet adjustment.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and in particular to a printing device capable of distinguishing color differences and a method thereof. Background Art

[0002] In the modern printing industry, color accuracy and consistency are key factors in ensuring high-quality printed products. While traditional printing equipment can meet basic color requirements to a certain extent, it often struggles to achieve ideal color consistency and accuracy when processing complex patterns, fine color transitions, and printing on multiple surfaces. Therefore, developing a printing device that can distinguish color differences and automatically adjust them is particularly important.

[0003] Existing printing equipment usually relies on preset color standards and manual calibration to control printing quality. The manual calibration process is easily affected by the operator's experience and skills, resulting in color deviation. In addition, traditional equipment cannot monitor color changes during the printing process in real time. Once a color difference problem occurs, reprinting is often required, which increases costs and time consumption. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the manual calibration process in the existing technology is easily affected by the operator's experience and skills, resulting in color deviation, and traditional equipment is unable to monitor color changes in the printing process in real time. Once a color difference problem occurs, reprinting is often required, which increases cost and time consumption. A printing device and method with color difference resolution is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A printing device capable of distinguishing color differences comprises: at least one color difference detector, integratedly mounted at the output end of a printer body, for performing color detection immediately upon completion of a printed product; a brush head, mounted within the printer body via a movable platform, with a color tube fixedly mounted on the brush head and used for externally connecting pigments; a pressure regulating assembly, integrated within the brush head, comprising a pressure sensor for real-time monitoring of the current pressure value and feeding it back to the printer body; wherein a first piezoelectric material and a second piezoelectric material are mounted within the brush head, the first piezoelectric material being used to contact the pressure regulating assembly to convert mechanical pressure into an electrical signal, and the second piezoelectric material being used to receive the current signal and generate deformation to control inkjet behavior.

[0007] In order to convert mechanical pressure into an electrical signal, preferably, the first piezoelectric material includes a PZT plate and a buffer pad, a support frame is fixedly installed in the brush head, the PZT plate is fixedly installed on the support frame, and the electrodes at both ends are respectively connected to the signal processing unit in the printer body, and the buffer pad is fixedly installed on the side of the PZT plate away from the support frame for abutting against the pressure adjustment component.

[0008] In order to receive current signals and generate deformation to control the inkjet behavior, the second piezoelectric material further includes a vibration plate, and a piezoelectric ceramic plate embedded in the vibration plate, which is fixedly installed on the inkjet hole inside the brush head, wherein the number of the second piezoelectric materials is consistent with the number of inkjet holes in the brush head and are connected in series with each other, and the piezoelectric ceramic plates at both ends are electrically connected to the signal processing unit respectively.

[0009] In order to process the electrical signal generated by the first piezoelectric material and generate a control signal to transmit to the second piezoelectric material, the signal processing unit further includes an amplifier, a filter and an analog-to-digital converter, which are used to process the electrical signal generated by the first piezoelectric material and generate a control signal to transmit to the second piezoelectric material.

[0010] In order to be able to directly transfer the generated pressure to the first piezoelectric material and convert it into an electrical signal, preferably, the pressure regulating assembly includes: a cover shell fixedly mounted on the brush head, a first support seat and a second support seat fixedly mounted in the cover shell, an eccentric wheel mounted in the first support seat, a motor for driving the eccentric wheel to rotate fixedly mounted on the first support seat, an L-shaped connecting arm rotatably mounted on the second support seat, a roller rotatably mounted on one end of the L-shaped connecting arm close to the eccentric wheel, and a push rod rotatably mounted on the other end of the L-shaped connecting arm; a limit seat, fixedly mounted in the cover shell, an extrusion block slidably mounted inside, and the extrusion block is rotatably connected to the push rod.

[0011] In order to drive the L-shaped connecting arm to reset, further, both sides of the extrusion block have connecting parts that are adapted to the limiting seat, and a spring is fixedly connected between the connecting part and the inner bottom surface of the limiting seat.

[0012] In order to buffer and stabilize pressure changes, further, the cross section of the eccentric wheel is a right-angled trapezoid with a smooth transition of the inclined surface.

[0013] In order to change the amplitude of the up and down movement of the L-shaped connecting arm, and thus change the magnitude of the current, further, a horizontal axis is rotatably installed in the first support seat, the eccentric wheel is slidably installed on the horizontal axis, an actuator is fixedly installed on the first support seat, a guide rod is fixedly installed in the first support seat, a clamping block is slidably installed on the guide rod, and the output end of the actuator is fixedly connected to the clamping block.

[0014] In order to transmit the collected color data to the printer body 5 for comparison with the set parameters, preferably, the color difference detector includes: a high-precision optical sensor for capturing the color information of the printed surface; a light source for providing stable and uniform lighting conditions; and a data interface for transmitting the collected color data to the printer body.

[0015] A printing method capable of distinguishing color differences comprises the following steps:

[0016] Step 1: Enter or select the desired target color standard through the user interface and configure the initial parameters;

[0017] Step 2: Continuously scan the surface of the printed product being produced through the detection device to collect color data;

[0018] Step 3: Send the collected color data to the printing press control system for comparison and analysis with the preset standard color to calculate the color difference;

[0019] Step 4: When the color difference is detected to exceed the set threshold, the inkjet behavior is adjusted by changing the inkjet pressure;

[0020] Step 5: The adjusted printed product is inspected again by the inspection device, and the new color data enters the control system for analysis to determine whether further adjustment is required.

[0021] Compared with the prior art, the present invention provides a printing device and method capable of distinguishing color differences, which have the following beneficial effects:

[0022] 1. This printing device capable of distinguishing color differences uses a color difference detector to continuously scan the surface of the printed matter being produced to obtain color data. The collected color data is transmitted to the signal processing unit. The motor in the pressure adjustment component drives the eccentric wheel to adjust the pressure of the brush head on the paper in real time as needed, allowing the system to flexibly adjust the pressure according to actual needs during the printing process. The entire system, from color detection, pressure sensing to inkjet adjustment, forms a closed-loop control circuit. Once a color difference or pressure change is detected outside the preset range, the signal processing unit can quickly generate and send control instructions to adjust printing parameters such as brush head pressure and inkjet volume in real time, ensuring fast response and high-precision matching during the printing process.

[0023] 2. This printing device with color difference resolution receives the current signal from the signal processing unit through the second piezoelectric material and produces deformation of different amplitudes according to the current size, thereby accurately controlling the inkjet volume. It overcomes the nonlinear characteristics of traditional voltage control systems and provides higher inkjet accuracy. At the same time, it allows flexible adjustment of inkjet parameters when facing multi-level printing or multi-material surfaces, ensuring smooth and natural color transitions and improving the quality of the final printed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a printing device capable of resolving color differences proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a pressure regulating assembly of a printing device capable of distinguishing color differences proposed by the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of an extrusion block of a printing device capable of distinguishing color differences proposed by the present invention;

[0027] Figure 4 This is a schematic diagram of the brush head structure of a printing device capable of distinguishing color differences proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the second piezoelectric material of a printing device capable of resolving color differences proposed by the present invention;

[0029] Figure 6 This is a schematic diagram of a signal processing unit of a printing device capable of resolving color differences proposed by the present invention.

[0030] In the figure: 1. Color difference detector;

[0031] 2. Brush head; 3. Color tube;

[0032] 4. Pressure regulating assembly; 401. Housing; 402. First support base; 403. Second support base; 404. Eccentric wheel; 405. Motor; 406. L-shaped connecting arm; 407. Roller; 408. Push rod; 409. Limiting seat; 410. Extrusion block; 411. Connecting portion; 412. Spring; 413. Actuator; 414. Guide rod; 415. Horizontal axis; 416. Clamping block; 417. Pressure sensor;

[0033] 5. Printing machine body; 501. Signal processing unit;

[0034] 6. First piezoelectric material; 601. PZT plate; 602. Buffer pad;

[0035] 7. Second piezoelectric material; 701. Vibration plate; 702. Piezoelectric ceramic plate;

[0036] 8. Support frame. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] Example:

[0040] Reference Figure 1-6 A printing device with color difference resolution includes: at least one color difference detector 1, which is integrated and installed at the output end of a printer body 5 and is used to perform color detection immediately after the printed product is completed. Preferably, there are two color difference detectors 1, which are located on both sides of the output end of the printer body 5, and include: a high-precision optical sensor for capturing color information on the surface of the printed product; a light source for providing stable and uniform lighting conditions; a data interface for transmitting the collected color data to the printer body 5; a brush head 2, which is installed in the printer body 5 through a movable platform, allowing the brush head 2 to move freely in the printing area, and a color tube 3 is fixedly installed on the brush head 2 and is used to connect external pigments to ensure a smooth and accurate inkjet process; a pressure regulating component 4, which is integrated on the brush head 2 and includes a pressure sensor 417 for real-time monitoring of the current pressure value and feeding it back to the printer body 5; wherein a first piezoelectric material 6 and a second piezoelectric material 7 are installed in the brush head 2, the first piezoelectric material 6 is used to contact the pressure regulating component 4 to convert mechanical pressure into an electrical signal, and the second piezoelectric material 7 is used to receive the current signal and generate deformation to control the inkjet behavior.

[0041] It should be noted that the printer body 5 has a user interface, which serves as an interactive bridge between humans and machines, allowing operators to input instructions, set parameters, and monitor the operating status of the equipment.

[0042] The desired target color standard is input or selected through the user interface, and the initial parameters of the printer body 5 are configured. The color difference detector 1 continuously scans the surface of the printed matter being produced to obtain color data. The pressure sensor 417 monitors the actual pressure value of the brush head 2 on the paper in real time, and feeds the data back to the control system of the printer body 5. The collected color data and pressure data are transmitted to the printer body 5 for analysis, and the color difference and required pressure are calculated. The adjustment amount control system generates a current signal based on the analysis results and transmits it to the second piezoelectric material 7 through a wire, causing it to deform, and then adjusts the working state of the nozzle. The adjusted printed matter is detected again by the color difference detector 1, and the new color data enters the control system for analysis to determine whether further adjustment is needed. The entire system forms a closed-loop control loop. From color detection, pressure sensing to inkjet adjustment, all steps are closely linked to ensure fast response and high-precision color matching.

[0043] Reference Figure 4-Figure 6 Preferably, the first piezoelectric material 6 includes a PZT plate 601 and a buffer pad 602. The PZT plate 601 is a piezoelectric element based on lead zirconate titanate material with good piezoelectric effect. The buffer pad 602 is used to contact the pressure regulating component 4, protect the PZT plate 601 from direct impact, and ensure that the applied pressure is evenly distributed on the entire surface of the PZT plate 601. A support frame 8 is fixedly installed in the brush head 2, and the PZT plate 601 is fixedly installed on the support frame 8. The electrodes at both ends are respectively connected to the signal processing unit 501 in the printer body 5. The buffer pad 602 is fixedly installed on the side of the PZT plate 601 away from the support frame 8, and is used to abut against the pressure regulating component 4. When the PZT plate 601 is subjected to mechanical pressure, it will generate corresponding electrical signals, which are transmitted to the signal processing unit 501 through the electrodes for further processing.

[0044] The second piezoelectric material 7 includes a vibration plate 701 and a piezoelectric ceramic plate 702 embedded in the vibration plate 701, which is fixedly mounted on the inkjet hole inside the brush head 2. The vibration plate 701 is usually made of metal or polymer and has certain flexibility and strength. The piezoelectric ceramic plate 702 can deform according to the received current signal, thereby accurately controlling the inkjet amount and injection pattern. Among them, the number of second piezoelectric materials 7 is consistent with the number of inkjet holes in the brush head 2 and are connected in series with each other. The piezoelectric ceramic plates 702 at both ends are electrically connected to the signal processing unit 501 respectively.

[0045] The signal processing unit 501 is responsible for processing the electrical signal generated by the first piezoelectric material 6 and generating a control signal for transmission to the second piezoelectric material 7. It includes an amplifier, a filter and an analog-to-digital converter, which are used to process the electrical signal generated by the first piezoelectric material 6 and generate a control signal for transmission to the second piezoelectric material 7. Preferably, the amplifier is used to enhance the weak electrical signal output from the first piezoelectric material 6 so that it reaches the amplitude required for subsequent processing. The filter removes the noise component in the signal to ensure that the signal input to the analog-to-digital converter is pure and free of interference. The analog-to-digital converter converts the amplified analog signal into a digital signal for analysis and processing by a computer or microcontroller. Based on the processed digital signal, the signal processing unit 501 generates a corresponding control signal and transmits it to each piezoelectric ceramic plate 702 in the second piezoelectric material 7 through a wire to achieve precise control of the inkjet behavior.

[0046] Through the above-mentioned structural setting, the collected color data and pressure data are transmitted to the signal processing unit 501 for analysis, and the color difference and the required pressure adjustment amount are calculated. When the brush head 2 is subjected to pressure changes from the pressure adjustment component 4, the PZT plate 601 in the first piezoelectric material 6 generates an electrical signal. After amplification, filtering and analog-to-digital conversion, the signal is sent to the signal processing unit 501. According to the analysis results, the signal processing unit 501 generates a current signal and transmits it to each piezoelectric ceramic plate 702 in the second piezoelectric material 7 through a wire, causing it to deform, thereby adjusting the working state of the nozzle. Increasing the inkjet pressure usually causes more ink to be sprayed onto paper or other printing media. On the contrary, reducing the pressure will reduce the amount of ink sprayed. The change in the amount of ink directly affects the depth and saturation of the color. At the same time, the pressure adjustment component 4 changes the pressure of the brush head 2 on the paper. Different pressures will cause changes in the thickness of the ink layer, thereby affecting the color performance. By precisely controlling the pressure, the color difference problem caused by pressure changes can be reduced, ensuring color consistency and accuracy.

[0047] Reference Figure 2 and Figure 3The pressure regulating assembly 4 includes: a cover 401 fixedly mounted on the brush head 2, which is used to protect the internal mechanical components and provide support. A first support seat 402 and a second support seat 403 are fixedly mounted in the cover 401, and an eccentric wheel 404 is mounted in the first support seat 402. Specifically, the cross section of the eccentric wheel 404 is a right-angled trapezoid, and the inclined surface has a smooth transition to achieve smooth pressure adjustment. A motor 405 for driving the eccentric wheel 404 to rotate is fixedly mounted on the first support seat 402. The motor 405 is electrically connected to the control system inside the printing machine body 5 and receives a control signal to adjust the eccentric wheel 404. An L-shaped connecting arm 406 is rotatably mounted on the second support seat 403. A roller 407 is rotatably mounted on one end of the L-shaped connecting arm 406 close to the eccentric wheel 404, and a push rod 408 is rotatably mounted on the other end of the L-shaped connecting arm 406; a limiting seat 409 is fixedly mounted in the cover 401, and an extrusion block 410 is slidably mounted inside, and the extrusion block 410 is rotatably connected to the push rod 408.

[0048] Furthermore, both sides of the extrusion block 410 have connecting parts 411 adapted to the limiting seat 409 , and a spring 412 is fixedly connected between the connecting part 411 and the inner bottom surface of the limiting seat 409 for buffering and stabilizing pressure changes.

[0049] A horizontal shaft 415 is rotatably installed in the first support seat 402, and the eccentric wheel 404 is slidably installed on the horizontal shaft 415. An actuator 413 is fixedly installed on the first support seat 402. A guide rod 414 is fixedly installed in the first support seat 402, and a clamping block 416 is slidably installed on the guide rod 414. The output end of the actuator 413 is fixedly connected to the clamping block 416. Preferably, the actuator 413 is a cylinder, which has the advantage of fast response.

[0050] Through the above-mentioned structural setting, the operator inputs or selects the desired target color standard through the user interface and configures the initial parameters of the printing machine body 5. When the system is initialized, the motor 405 sets the eccentric wheel 404 to a reference angle. At this time, the push rod 408 drives the brush head 2 to apply an initial pressure. The color difference detector 1 continuously scans the surface of the printed matter being produced to obtain color data. The pressure sensor 417 monitors the actual pressure value of the brush head 2 on the paper in real time and feeds the data back to the printing machine control system. The collected color data and pressure data are transmitted to the signal processing unit 501 for analysis to calculate the color difference and the required pressure adjustment amount. If the color difference is detected to be outside the preset range, or there is a difference between the actual pressure and the target pressure, adjustment is required. The signal processing unit 501 generates a control instruction and sends it to the actuator 413. The actuator 413 pushes the eccentric wheel 404 to move to a specific position. Due to the design of the eccentric wheel 404, its different radius parts will push the roller 407, and then drive the L-shaped connecting arm 406 to move up and down. As the L-shaped connecting arm 406 moves up and down, the push rod 408 will also move up and down and contact the first piezoelectric material 6. The generated pressure can be directly transmitted to the first piezoelectric material 6. The first piezoelectric material 6 transmits these electrical signals to the signal processing unit 501 through electrodes. The signal processing unit 501 amplifies, filters and converts the received electrical signals generated by the first piezoelectric material 6 into analog-to-digital signals, and generates corresponding control signals. These control signals are transmitted to each piezoelectric ceramic plate 702 in the second piezoelectric material 7 through wires. According to the size of the received current, the vibration plate 701 produces different deformation amplitudes, thereby accurately controlling the inkjet behavior.

[0051] One of the application scenarios of the pressure regulating component 4:

[0052] 1. Testing and analysis:

[0053] The color difference detector 1 finds that the color values of certain areas are lower than the target values.

[0054] The pressure sensor 417 reports that the current pressure of the brush head 2 on the paper is low.

[0055] 2. Adjustment instructions:

[0056] The signal processing unit 501 calculates the pressure value that needs to be increased, generates a corresponding control instruction, and sends it to the execution component 413.

[0057] 3. Execution adjustment:

[0058] The actuator 413 pushes the clamping block 416 according to the instruction, causing the eccentric wheel 404 to rotate a certain angle, thereby changing the position of the L-shaped connecting arm 406.

[0059] The movement of the L-shaped connecting arm 406 causes the push rod 408 to rise, and the squeezing block 410 applies greater pressure downward, thereby increasing the pressure of the brush head 2 on the paper.

[0060] The increased pressure is converted into an electrical signal by the first piezoelectric material 6 , transmitted to the signal processing unit 501 , and further generates a control signal to the second piezoelectric material 7 .

[0061] 4. Verification effect:

[0062] The color difference detector 1 is used to inspect the printed product again to confirm whether the color reaches the target value.

[0063] If the expected effect is still not achieved, the system will repeat the above steps until it is satisfied.

[0064] A printing method capable of distinguishing color differences comprises the following steps:

[0065] Step 1: Initialization settings

[0066] 1. Enter the target color standard:

[0067] The operator inputs or selects the desired target color standard through the user interface;

[0068] Configuring initial parameters of the printer body 5, including but not limited to resolution, printing speed, etc.;

[0069] 2. System initialization:

[0070] When the system is initialized, the motor 405 sets the eccentric wheel 404 to a reference angle, and the push rod 408 drives the brush head 2 to apply an initial pressure;

[0071] The first piezoelectric material 6 and the second piezoelectric material 7 are also in a ready state, waiting to receive a control signal;

[0072] Step 2: Real-time monitoring and data collection

[0073] 1. Color difference detector 1 scan:

[0074] The color difference detector 1 continuously scans the surface of the printed matter being produced to obtain color data;

[0075] High-precision optical sensors capture color information on the printed surface, and the light source provides stable and uniform lighting conditions to ensure measurement accuracy;

[0076] 2. Pressure sensor 417 monitoring:

[0077] The pressure sensor 417 monitors the actual pressure value of the brush head 2 on the paper in real time and feeds the data back to the printing press control system;

[0078] Step 3: Data Analysis

[0079] 1. Signal processing unit 501 analysis:

[0080] The collected color data and pressure data are transmitted to the signal processing unit 501 for analysis;

[0081] The signal processing unit 501 amplifies, filters, and performs analog-to-digital conversion on the received electrical signal generated by the first piezoelectric material 6 to generate a control signal;

[0082] Calculate color difference and required pressure adjustment;

[0083] Step 4: Perform adjustments

[0084] 1. Generate and send control instructions:

[0085] If the color difference detected exceeds the preset range, or there is a difference between the actual pressure and the target pressure, adjustment is required;

[0086] The signal processing unit 501 generates a control instruction and sends it to the execution component 413;

[0087] 2. Adjust the pressure:

[0088] The actuator 413 pushes the clamping block 416, thereby moving the eccentric wheel 404 to a specific position;

[0089] The different radius parts of the eccentric wheel 404 will push the roller 407, which in turn drives the L-shaped connecting arm 406 to move up and down;

[0090] As the L-shaped connecting arm 406 moves up and down, the push rod 408 also moves up and down, changing the position of the squeezing block 410, thereby adjusting the pressure of the brush head 2 on the paper;

[0091] 3. The first piezoelectric material 6 generates an electrical signal:

[0092] The push rod 408 moves up and down and contacts the first piezoelectric material 6, and the pressure generated can be directly transmitted to the first piezoelectric material 6;

[0093] The first piezoelectric material 6 converts mechanical energy into electrical energy and transmits these electrical signals to the signal processing unit 501 through the electrodes;

[0094] 4. The second piezoelectric material 7 deforms to control inkjet:

[0095] The control signal is transmitted to each piezoelectric ceramic plate 702 in the second piezoelectric material 7 through a wire;

[0096] According to the magnitude of the received current, the vibration plate 701 generates different deformation amplitudes, thereby precisely controlling the inkjet behavior such as the inkjet amount or the jetting angle;

[0097] Step 5: Feedback Verification

[0098] 1. Re-test and analysis:

[0099] The adjusted printed product is detected again by the color difference detector 1, and the new color data enters the control system for analysis;

[0100] Determine whether further adjustment is needed. If color difference or other problems still exist, the system will continue to adjust until the ideal effect is achieved.

[0101] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A printing device capable of distinguishing color differences, characterized in that: include: At least one color difference detector (1) is integrated and installed at the output end of the printing machine body (5) and is used for color detection immediately after the printed product is completed; A brush head (2) is installed in the printer body (5) via a movable platform, and a color tube (3) is fixedly installed on the brush head (2) and is used for externally connecting pigments; A pressure regulating assembly (4), integrated on the brush head (2), comprising a pressure sensor (417), for monitoring the current pressure value in real time and feeding it back to the printer body (5); The brush head (2) is provided with a first piezoelectric material (6) and a second piezoelectric material (7), wherein the first piezoelectric material (6) is used to contact the pressure regulating component (4) to convert mechanical pressure into an electrical signal, and the second piezoelectric material (7) is used to receive the current signal and generate deformation to control the inkjet behavior.

2. A printing device capable of distinguishing color differences according to claim 1, characterized in that: The first piezoelectric material (6) includes a PZT plate (601) and a buffer pad (602); a support frame (8) is fixedly installed in the brush head (2); the PZT plate (601) is fixedly installed on the support frame (8); electrodes at both ends are respectively connected to the signal processing unit (501) in the printer body (5); the buffer pad (602) is fixedly installed on the side of the PZT plate (601) away from the support frame (8) and is used to abut against the pressure regulating component (4).

3. A printing device capable of distinguishing color differences according to claim 2, characterized in that: The second piezoelectric material (7) includes a vibration plate (701), and a piezoelectric ceramic plate (702) embedded in the vibration plate (701), It is fixedly mounted on the inkjet hole inside the brush head (2), The number of the second piezoelectric materials (7) is consistent with the number of inkjet holes in the brush head (2) and they are connected in series, and the piezoelectric ceramic plates (702) at both ends are electrically connected to the signal processing unit (501) respectively.

4. A printing device capable of distinguishing color differences according to claim 3, characterized in that: The signal processing unit (501) comprises an amplifier, a filter and an analog-to-digital converter, and is used to process the electrical signal generated by the first piezoelectric material (6) and generate a control signal to transmit to the second piezoelectric material (7).

5. The printing device capable of distinguishing color difference according to claim 1, characterized in that: The pressure regulating assembly (4) comprises: A cover (401) is fixedly mounted on the brush head (2), a first support seat (402) and a second support seat (403) are fixedly mounted in the cover (401), an eccentric wheel (404) is mounted in the first support seat (402), a motor (405) for driving the eccentric wheel (404) to rotate is fixedly mounted on the first support seat (402), an L-shaped connecting arm (406) is rotatably mounted on the second support seat (403), a roller (407) is rotatably mounted on one end of the L-shaped connecting arm (406) close to the eccentric wheel (404), and a push rod (408) is rotatably mounted on the other end of the L-shaped connecting arm (406); The limiting seat (409) is fixedly installed in the cover shell (401), and an extrusion block (410) is slidably installed inside. The extrusion block (410) is rotatably connected to the push rod (408).

6. The printing device capable of distinguishing color difference according to claim 5, characterized in that: Both sides of the extrusion block (410) are provided with connecting parts (411) adapted to the limiting seat (409), and a spring (412) is fixedly connected between the connecting part (411) and the inner bottom surface of the limiting seat (409).

7. The printing device capable of distinguishing color differences according to claim 6, characterized in that: The cross section of the eccentric wheel (404) is a right-angled trapezoid, and the inclined surface has a smooth transition.

8. The printing device capable of distinguishing color differences according to claim 7, characterized in that: A horizontal shaft (415) is rotatably mounted in the first support seat (402), the eccentric wheel (404) is slidably mounted on the horizontal shaft (415), an actuator (413) is fixedly mounted on the first support seat (402), a guide rod (414) is fixedly mounted in the first support seat (402), a clamping block (416) is slidably mounted on the guide rod (414), and an output end of the actuator (413) is fixedly connected to the clamping block (416).

9. The printing device capable of distinguishing color difference according to claim 1, characterized in that: The color difference detector (1) comprises: High-precision optical sensor for capturing color information on the printed surface; A light source for providing stable and uniform lighting conditions; A data interface is used to transmit the collected color data to the printer body (5).

10. A printing method capable of distinguishing color differences, comprising the printing device capable of distinguishing color differences according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Enter or select the desired target color standard through the user interface and configure the initial parameters; Step 2: Continuously scan the surface of the printed product being produced through the detection device to collect color data; Step 3: Send the collected color data to the printing press control system for comparison and analysis with the preset standard color to calculate the color difference; Step 4: When the color difference is detected to exceed the set threshold, the inkjet behavior is adjusted by changing the inkjet pressure; Step 5: The adjusted printed product is inspected again by the inspection device, and the new color data enters the control system for analysis to determine whether further adjustment is required.

Images