Sheet-fed ink-jet printing device based on magnetic suspension technology and control system of sheet-fed ink-jet printing device

Abstract

The invention relates to a single-sheet ink-jet printing device based on a magnetic suspension technology and a control system thereof, the single-sheet ink-jet printing device comprises a platform base, a magnetic suspension annular guide rail is fixedly arranged on the platform base, a plurality of ink-jet printing units are arranged on one side of the magnetic suspension annular guide rail, and a feeding and discharging unit is arranged on the other opposite side of the magnetic suspension annular guide rail; the magnetic suspension annular guide rail comprises a guide rail body, an annular groove is formed in the outer edge face of the guide rail body, a magnetic suspension annular magnet and a magnetic suspension annular power supply ring are installed in the annular groove in an embedded mode, and the magnetic suspension annular power supply ring is located above the magnetic suspension annular magnet. A plurality of magnetic suspension material tables are arranged on the periphery of the magnetic suspension annular magnet, the magnetic suspension material tables and the magnetic suspension annular magnet repel or attract each other through magnetic force so that the guide rail can suspend and move along the periphery of the guide rail body, and a multi-redundant magnetic force control system is arranged between the magnetic suspension annular magnet and the magnetic suspension material tables.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, and in particular to a sheet-fed inkjet printing device based on magnetic levitation technology and a control system thereof. Background Art

[0002] Inkjet printing equipment usually includes inkjet components and paper feeding units. During the printing process, the paper feeding unit is responsible for feeding the paper. The loading platform of the paper feeding unit moves the paper in sync with the movement of the nozzle to coordinate and complete the printing process.

[0003] At present, sheet-fed inkjet printing equipment uses traditional mechanical transmission methods such as grippers, belt suction, and electrostatic adsorption to transfer and hand over paper, which can easily cause paper jams, low speeds, high failure rates, inaccurate registration accuracy, and inconvenient maintenance.

[0004] For example, Chinese patent CN202210241374.7 discloses an inkjet printer, which has a print head, and the print head is composed of: a spray gun, which applies a constant period of vibration to the ejected ink to generate continuous ink droplets; a charged electrode, which applies a step-wave voltage synchronized with the period of the ink droplets to charge the ink droplets; a deflection electrode, which deflects the charged ink droplets in a vertical direction or a horizontal direction according to the degree of charge, so that the ink droplets land on the printing surface of the printed object; and a cylindrical head cover, which controls the spray gun, The charged electrode and the deflection electrode are accommodated in the hollow portion, and a slit is formed for the charged ink droplets to pass through, so that the ink droplets ejected from the print head land on the printed object moving in the horizontal direction or the vertical direction, and text is formed by using multiple columns of printing dots. It is characterized in that the head cover is constructed to include: a cylindrical cover body with a sealed rear end; and a cover installed in a manner covering the front part of the cover body, and the cover is provided with: the slit; and a blowing outlet surrounding at least a part of the slit, and air is sprayed toward the printed object from the blowing outlet.

[0005] In the above scheme, although spraying air to the printed material through the blower port can help the ink droplets adhere to the paper better, the traditional mechanical transmission methods such as gripping teeth, belt suction, electrostatic adsorption, etc. are still used to transfer and hand over the paper, which can easily cause paper jams, low speed, high failure rate, inaccurate registration accuracy, inconvenient maintenance and other problems. Summary of the invention

[0006] The present invention proposes a sheet-fed inkjet printing device based on magnetic levitation technology and a control system thereof, aiming to solve the problems of paper jamming, slow transmission speed, high failure rate and poor registration accuracy existing in traditional sheet-fed inkjet printing equipment.

[0007] To achieve the above-mentioned purpose, the present invention proposes a single-sheet inkjet printing device based on magnetic levitation technology, comprising a platform base, a plurality of inkjet printing units located on one side of the platform base, and a loading mechanism and an unloading mechanism located on the other side of the platform base, characterized in that the platform base is provided with a magnetic levitation annular guide rail, a plurality of magnetic levitation movers matched with the magnetic levitation annular guide rail, a magnetic levitation annular magnet and a magnetic levitation annular power supply ring installed in the magnetic levitation annular guide rail, and a magnetic levitation material table fixed on the magnetic levitation mover for conveying paper, the magnetic levitation material table being fixed with a guide support portion, and when the magnetic levitation mover moves on the magnetic levitation annular guide rail, the guide support portion supports and guides the magnetic levitation material table.

[0008] As a further preferred technical solution of the present invention, the magnetic levitation material platform includes a material platform body, a tray mounting plate arranged on the material platform body, and an air suction tray arranged on the tray mounting plate.

[0009] As a further preferred technical solution of the present invention, the guide support part includes a lateral mounting plate fixedly connected to the material platform body, an upper lateral clamp block arranged on the lateral mounting plate, a lower support clamp block, an upper lateral annular groove arranged on the side of the magnetic levitation annular guide rail and cooperating with the upper lateral clamp block, and a lower lateral annular groove cooperating with the lower support clamp block.

[0010] As a further preferred technical solution of the present invention, the lateral mounting plate is also provided with a lower lateral mounting groove located below the lower supporting block and a guide wheel installed in the lower lateral mounting groove, and the side of the magnetic levitation annular guide rail is provided with a lower lateral annular groove matching the guide wheel.

[0011] As a further preferred technical solution of the present invention, an air suction cavity is opened in the air suction tray, an air suction fan is arranged in the air suction cavity, and air suction tray holes are evenly distributed on the surface of the air suction tray.

[0012] As a further preferred technical solution of the present invention, a push plate assembly is provided on one side of the tray mounting plate;

[0013] The push plate assembly includes: a mounting base plate, the mounting base plate is arranged above the tray mounting plate, a guide rail is fixedly provided on the outer edge surface of the tray mounting plate, a sliding wheel is provided below the mounting base plate, the sliding wheel slides in cooperation with the guide rail so that the push plate assembly can slide smoothly along the guide rail, a buckle portion is provided above the mounting base plate, a suction tray is detachably mounted on the buckle portion, and a loading and unloading push rod is provided on the periphery of the buckle portion.

[0014] To achieve the above object, the present invention further proposes a magnetic control system, comprising: a sheet-fed inkjet printing device based on magnetic levitation technology as described in claims 1-10, wherein the magnetic control system adopts a matrix multiplier circuit structure;

[0015] The matrix multiplier circuit structure includes N branches arranged between a power supply voltage and a reference ground, where N≥2;

[0016] Each branch includes N switching tubes and a controllable current source. The reference ground is connected to the power supply voltage through N switching tubes connected in series and a controllable current source. The common end connected to the Nth switching tube and the controllable current source serves as the row output end to generate a row output voltage. The gate of each switching tube is connected to the same gate control voltage, and the substrate of each switching tube is connected to the corresponding substrate control voltage.

[0017] In the first branch, the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes and the first controllable current source I1 are connected in series in sequence to the power supply voltage, and the common end of the first controllable current source I1 connected to the first row of N switch tubes is used as the first row output end to generate the first row output voltage V1, and the gates of the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes are connected to the gate control voltage V0, and their substrates are respectively connected to the first row of first substrate control voltage VG11, the first row of second substrate control voltage VG12 to the first row of N substrate control voltage VG1N.

[0018] In the nth branch, the first switch tube in the nth row, the second switch tube in the nth row, the Nth switch tube in the nth row, and the nth controllable current source In are connected in series to the power supply voltage, and the common end of the nth controllable current source In connected to the Nth switch tube in the nth row is used as the nth row output end to generate the nth row output voltage Vn, and the gates of the first switch tube in the nth row, the second switch tube in the nth row, and the Nth switch tube in the nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGn1 in the nth row and the second substrate control voltage VGn2 in the nth row. n 2 to the Nth row Nth substrate control voltage VGnN, 1<n <N。

[0019] In the Nth branch, the first switch tube of the Nth row, the second switch tube of the Nth row, the Nth switch tube of the Nth row and the Nth controllable current source IN connected in series are connected to the power supply voltage, and the common end of the Nth controllable current source IN connected to the Nth switch tube of the Nth row is used as the Nth row output end to generate the Nth row output voltage VN, and the gates of the first switch tube of the Nth row, the second switch tube of the Nth row, the Nth switch tube of the Nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGN1 of the Nth row, the second substrate control voltage VGN2 of the Nth row, and the Nth substrate control voltage VGNN of the Nth row.

[0020] Said N=3.

[0021] The output voltage of the first row, the output voltage of the second row, and the output voltage of the third row are expressed as:

[0022] V1=I1·R ds11 +I1·R ds12 +I1·R ds13

[0023] V2=I2·R ds21 +I2·R ds22 +I2·R ds23

[0024] V3=I3·R ds31 +I3·R ds32 +I3·R ds33

[0025] Among them, R ds11 , R ds12 , R ds13 are the on-resistances of the first switch tube in the first row, the second switch tube in the first row, and the third switch tube in the first row, respectively. ds21 , R ds22 , R ds23 are the on-resistances of the first switch tube in the second row, the second switch tube in the second row, and the third switch tube in the second row, respectively. ds31 , R ds32 , R ds33 They are the on-resistances of the first switch tube in the third row, the second switch tube in the third row, and the third switch tube in the third row respectively; V2 is the output voltage of the second row; V3 is the output voltage of the third row; I2 is the second controllable current source; and I3 is the third controllable current source.

[0026] The output voltage of the first row, the output voltage of the second row, and the output voltage of the third row are expressed as:

[0027]

[0028] Among them, VG 13 The third substrate control voltage of the first row, VG 21 , VG 22 , VG 23 They are respectively the first substrate control voltage of the second row, the second substrate control voltage of the second row, and the third substrate control voltage of the second row; VG31, VG32, and VG33 are respectively the first substrate control voltage of the third row, the second substrate control voltage of the third row, and the third substrate control voltage of the third row.

[0029] The SRAM IMC includes a multiplier and a data IO unit; the multiplier is used to implement a matrix multiplier circuit to perform matrix multiplication; the data IO unit is used to receive a substrate control voltage, a gate control voltage, and a control signal of a controllable current source transmitted from the outside, and transmit them to the multiplier to perform matrix multiplication, and transmit the output voltage vector after the matrix multiplication operation to the outside.

[0030] The beneficial effects of the technical solution of the present invention are:

[0031] Since the magnetic suspension material table does not contact any physical surface during movement, it can significantly reduce paper jams and misalignment problems caused by friction or resistance, thereby improving the stability of paper transmission. At the same time, the rapid movement of the magnetic suspension mover on the magnetic suspension ring guide reduces the time required for paper transfer, making the entire printing process more efficient, thereby increasing the printing speed.

[0032] The segmented magnetic suspension ring power supply design, combined with flexible cable connections, ensures that even if a section of the power supply ring fails, other sections can continue to supply power, ensuring the continuous operation of the entire system. In addition, the independent power supply module equipped in each power supply ring section can adjust the voltage and current according to the actual load conditions, thereby optimizing energy efficiency and enhancing the system's adaptability to different working conditions.

[0033] The magnetic levitation ring magnet made of high-temperature superconducting materials has extremely low resistivity and high critical magnetic field strength, which enables the magnetic levitation ring magnet to generate a stronger magnetic field, thereby improving the suspension force and stability of the magnetic levitation mover.

[0034] The design of the guide support ensures that the magnetic suspension table can remain stable during movement. The upper lateral block and the lower support block cooperate with the corresponding ring grooves on the magnetic suspension annular guide rail to limit the lateral movement of the table, thereby reducing paper deviation caused by vibration or external force interference and improving printing accuracy.

[0035] The design of the push plate assembly allows the suction tray to be easily installed and removed as needed, allowing the operator to quickly change different types of paper or adjust the position of the paper according to different printing tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the first subject of the present invention;

[0037] Figure 2 A top view of the first subject of the present invention;

[0038] Figure 3 A side view of the first subject of the present invention;

[0039] Figure 4A side view of yet another embodiment of the subject matter of the present invention;

[0040] Figure 5 A schematic diagram of the structure of another embodiment of the subject of the present invention;

[0041] Figure 6 It is a structural schematic diagram of another embodiment of the subject of the present invention;

[0042] Figure 7 A rear view of another embodiment of the subject matter of the present invention;

[0043] Figure 8 A side view of another embodiment of the subject matter of the present invention;

[0044] Fig. 9 It is an installation diagram of another embodiment of the subject of the present invention;

[0045] Fig.10 It is a structural schematic diagram of the second subject of the present invention;

[0046] Fig.11 A side view of another embodiment of the subject matter of the present invention;

[0047] Fig.12 It is a side view of another embodiment of the subject matter of the present invention.

[0048] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0052] In addition, if the description of "first", "second", etc. is involved in the present invention, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or suggesting its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] refer to Figure 1-Figure 9 The applicant has found that the existing inkjet printers use traditional mechanical transmission methods such as grippers, belt suction, and electrostatic adsorption to transfer and hand over paper. There are many problems in actual use. The gripper handover method requires casting of gripper rollers, which takes a long time to manufacture and is not easy to ensure processing accuracy. Paper is fed on the roller, causing paper curling, and thick paper cannot be fed. The belt suction handover method has the problem of belt shaking, which limits the printing quality. The belt is prone to aging and deformation, all of which bring about transmission uncertainty. For this reason, the applicant has developed a single-sheet inkjet printing device based on magnetic levitation technology in this application, including: a platform base 100, a plurality of An inkjet printing unit 200, a loading mechanism 300 and a unloading mechanism 400 located on the other side of the platform base 100, the platform base 100 is provided with a magnetic suspension annular guide rail 101, a plurality of magnetic suspension movers 102 matched with the magnetic suspension annular guide rail 101, a magnetic suspension annular magnet 103 and a magnetic suspension annular power supply ring 104 installed in the magnetic suspension annular guide rail 101, and a magnetic suspension material platform 105 fixed on the magnetic suspension mover 102 for conveying paper, the magnetic suspension material platform 105 is fixed with a guide support part 106, and when the magnetic suspension mover 102 moves on the magnetic suspension annular guide rail 101, the guide support part 106 supports and guides the magnetic suspension material platform 105.

[0054] Among them, the number of inkjet printing units 200 is set according to actual needs, each printing unit is one color, the basic printing is four-color unit (cyan, magenta, yellow, black), and the others are spot color units (white, purple, orange and other colors). The paper loading mechanism 300 is used to automatically transport the paper to be printed, and the paper lowering mechanism 400 is used to transport the printed paper. The paper loading mechanism 300 and the paper lowering mechanism 400 are located on the same side of the platform base 1, and the inkjet printing unit 200 is located on the other side opposite to the platform base 100. The inkjet printing unit adopts a printer. These technical features are not described in detail here.

[0055] When working, the present invention starts the magnetic levitation mover to always maintain precise uniform motion on the magnetic levitation annular guide rail. When the magnetic levitation mover reaches the paper loading mechanism, the paper will be placed on the suction tray through the paper loading mechanism. The magnetic levitation mover moves with the paper to the corresponding inkjet printing unit to complete the printing of all colors in sequence. When the printing is completed, the magnetic levitation mover brings the printed paper to the paper unloading mechanism, and the paper unloading mechanism takes the printed paper off the suction tray 93 to complete the unloading process. This process is a reciprocating motion to complete the printing of multiple sheets of paper.

[0056] In this solution, since the magnetic suspension material table does not contact any physical surface during movement, it can significantly reduce the paper jam and misalignment problems caused by friction or resistance, thereby improving the stability of paper transmission. At the same time, the rapid movement of the magnetic suspension mover on the magnetic suspension ring guide reduces the time required for paper transmission, making the entire printing process more efficient, thereby increasing the printing speed.

[0057] Furthermore, traditional mechanical transmission methods are prone to failure due to wear, looseness, etc., while the magnetic levitation system, due to its non-contact nature, greatly reduces the occurrence of these common problems, simplifies the traditional complex mechanical structure, reduces the number of components, and reduces the maintenance cost and downtime of the equipment.

[0058] In one embodiment, the magnetic levitation annular magnet 103 is made of high-temperature superconducting material to improve its magnetic field strength and stability.

[0059] Furthermore, the magnetic suspension annular power supply ring 104 is configured in a segmented structure, and each segment of the power supply ring is connected by a flexible cable to ensure the continuity and reliability of power supply. Each power supply ring segment is equipped with an independent power supply module to adjust the voltage and current according to actual needs to adapt to different load conditions.

[0060] In this solution, the high temperature superconducting material has extremely low resistivity and high critical magnetic field strength, so that the magnetic levitation ring magnet 103 can generate a stronger magnetic field, thereby improving the levitation force and stability of the magnetic levitation mover 102 .

[0061] At the same time, the segmented structure of the magnetic suspension ring power supply ring 104, combined with the flexible cable connection, ensures that even if a certain section of the power supply ring fails, other sections can continue to supply power, ensuring the continuous operation of the entire system. In addition, the independent power supply module equipped in each power supply ring section can adjust the voltage and current according to the actual load conditions, thereby optimizing the energy efficiency and enhancing the system's adaptability to different working conditions.

[0062] Furthermore, due to the modular design, when a power supply ring segment needs to be repaired or replaced, it can be done quickly without shutting down the entire production line, which greatly reduces maintenance time and maintenance costs and improves production efficiency.

[0063] In one embodiment, the inkjet printing unit 200 is arranged above the magnetic suspension annular guide rail 100 through a height adjustment mechanism, and the height adjustment mechanism includes an adjustment bracket 1001 fixedly connected to the magnetic suspension annular guide rail 1, an adjustment screw 1002 installed on the adjustment bracket, a linear guide rail 1003, a sliding block 1004 arranged on the linear guide rail, an adjustment plate 1005 fixedly connected to the sliding block, and an adjustment motor 1006 for driving the adjustment screw to rotate, the adjustment plate is fixedly connected to the inkjet printing unit 2, the adjustment screw is provided with a screw nut 1007 fixedly connected to the adjustment plate, the number of linear guides 1003 is two, which are arranged in parallel, each linear guide is provided with the sliding block 1004, the sliding block is fixedly connected to the adjustment plate, the adjustment motor can select a servo motor, the adjustment motor drives the adjustment screw to rotate, and then the screw nut moves on the adjustment screw, and finally drives the adjustment inkjet printing unit to move, so as to achieve the purpose of adjusting the height.

[0064] In one embodiment, a multiple redundant magnetic control system is arranged between the magnetic levitation ring magnet 103 and the magnetic levitation material platform 105 .

[0065] Wherein, the magnetic force control system is controlled by a matrix multiplier circuit structure.

[0066] In one embodiment, the guide support portion 106 includes a lateral mounting plate 110 fixedly connected to the material platform body 107, an upper lateral block 111 arranged on the lateral mounting plate 110, a lower support block 112, an upper lateral annular groove 113 arranged on the side of the magnetic levitation annular guide rail 101 and cooperating with the upper lateral block 111, and a lower lateral annular groove 114 cooperating with the lower support block 112.

[0067] The lateral mounting plate 110 is also provided with a lower lateral mounting groove 115 located below the lower supporting block 112 and a guide wheel 116 installed in the lower lateral mounting groove 115 , and the side of the magnetic suspension annular guide rail 101 is provided with a lower lateral annular groove 117 that cooperates with the guide wheel 116 .

[0068] In this solution, the design of the guide support part 106 ensures that the magnetic suspension material platform 105 can remain stable during movement. The upper lateral block 111 and the lower support block 112 cooperate with the corresponding annular grooves on the magnetic suspension annular guide rail 101 to limit the lateral movement of the material platform, thereby reducing paper deviation caused by vibration or external force interference and improving printing accuracy.

[0069] At the same time, the setting of the guide wheel 116 provides an additional support point to help the paper remain stable during the transmission process. The guide wheel rolls in the lower side ring groove 117 on the side of the magnetic suspension annular guide rail 101, providing a smooth transition path for the paper, reducing the friction and wear of the paper during the transmission process.

[0070] In one embodiment, in order to ensure further stability during paper transportation and to ensure printing effect, a push plate assembly 119 is provided on one side of the tray mounting plate 108 .

[0071] The push plate assembly 119 includes: a mounting base plate 120, the mounting base plate 120 is arranged above the tray mounting plate 108, the outer edge surface of the tray mounting plate 108 is fixedly provided with a guide rail 121, a sliding wheel 122 is provided below the mounting base plate 120, the sliding wheel 122 is slidably matched with the guide rail 121, so that the push plate assembly 119 can slide smoothly along the guide rail 121, and a buckle portion 123 is provided above the mounting base plate 120, the suction tray 109 is detachably mounted on the buckle portion 123, and a loading and unloading push rod 124 is provided on the periphery of the buckle portion 123.

[0072] The loading and unloading push rod 124 at least includes: a push rod body 125 and a compression spring 126 , and the compression spring 126 is arranged on the outer periphery of the push rod body 125 .

[0073] In this solution, the design of the push plate assembly 119 allows the suction tray 109 to be easily installed and removed as needed, so that the operator can quickly change different types of paper or adjust the position of the paper according to different printing tasks.

[0074] At the same time, the use of the compression spring 126 provides the necessary elasticity for the push rod body 125, so that the push rod is more stable when pushing the paper, while reducing the risk of damaging the paper.

[0075] In one of the embodiments, a suction cavity is opened in the suction tray 109, a suction fan is arranged in the suction cavity, suction tray holes 118 are evenly distributed on the surface of the suction tray 109, a magnetic levitation mover 102 is arranged on one side of the material table body 107 close to the magnetic levitation ring magnet 103, the magnetic levitation mover 102 adopts wireless power supply technology, and a sliding wheel 122 is arranged above it.

[0076] In this solution, the suction cavity in the suction tray 109 and the evenly distributed suction tray holes 118 work together to generate a uniform negative pressure adsorption force, which firmly adsorbs the paper on the tray, effectively preventing the paper from sliding or shifting during high-speed transmission, and ensuring the stability and accuracy of the printing process. At the same time, the magnetic suspension mover 102 adopts wireless power supply technology, eliminating the line entanglement and wear problems caused by traditional wired power supply methods, making the movement of the material platform body 107 on the magnetic suspension annular guide rail 101 smoother and more unobstructed.

[0077] Furthermore, the provision of the sliding wheel 122 further reduces the friction resistance and improves the transmission efficiency of the entire system.

[0078] like Figure 10-11 As shown, the present invention also provides a magnetic force control system, which adopts a matrix multiplier circuit structure. The matrix multiplier circuit includes three branches arranged between the power supply voltage and the reference ground.

[0079] Each branch includes three switching tubes and a controllable current source. The reference ground is connected to the power supply voltage through three switching tubes connected in series and a controllable current source. The common end connected to the third switching tube and the controllable current source serves as the row output end to generate a row output voltage. The gate of each switching tube is connected to the gate control voltage V0, and the substrate of each switching tube is connected to the corresponding substrate control voltage.

[0080] Specifically, in the first branch, the reference ground is connected to the power supply voltage through the first row of first switch tubes, the first row of second switch tubes, the first row of third switch tubes and the first controllable current source I1 which are connected in series in sequence. The common end of the first controllable current source I1 connected to the first row of third switch tubes serves as the first row output end to generate the first row output voltage V1. The gates of the first row of first switch tubes, the first row of second switch tubes and the first row of third switch tubes are connected to the gate control voltage V0, and their substrates are respectively connected to the first row of first substrate control voltage VG11, the first row of second substrate control voltage VG12 and the first row of third substrate control voltage VG13.

[0081] Due to the substrate bias effect of the switch tube, the on-resistance of the switch tube can be adjusted by the substrate control voltage. The on-resistance of the switch tube is calculated by formula (1)-(2). On the basis of other fixed parameters, the on-resistance of the switch tube is determined by the substrate control voltage. By adjusting the substrate control voltages of the first switch tube in the first row, the second switch tube in the first row, and the third switch tube in the first row, the output voltage V1 of the first row can be adjusted. The output voltage V1 of the first row can be expressed as formula (3).

[0082]

[0083] V1=I1·Rds11 +I1·R ds12 +I1·R ds13 (3)

[0084] Among them, Rdson is the on-resistance of the switch tube, μs is the electron mobility, Cox is the capacitance of the gate oxide layer, W is the channel width, L is the channel length, VGS is the gate-source voltage, VTH is the threshold voltage, λ is the channel length modulation coefficient, VTH0 is the basic threshold voltage, γ is the body effect coefficient, φF is the reverse bias potential, VSB is the source-substrate potential difference, Rds11, Rds12, and Rds13 are the on-resistances of the first switch tube in the first row, the second switch tube in the first row, and the third switch tube in the first row, respectively.

[0085] In the second branch, the reference ground is connected to the power supply voltage through the second row first switch tube, the second row second switch tube, the second row third switch tube and the second controllable current source I2 which are connected in series in sequence. The common end of the second controllable current source I2 connected to the second row third switch tube serves as the second row output end to generate the second row output voltage V2. The gates of the second row first switch tube, the second row second switch tube and the second row third switch tube are connected to the gate control voltage V0, and their substrates are respectively connected to the second row first substrate control voltage VG21, the second row second substrate control voltage VG22 and the second row third substrate control voltage VG23.

[0086] By adjusting the substrate control voltages of the first switch tube in the second row, the second switch tube in the second row, and the third switch tube in the second row, the output voltage V2 of the second row can be adjusted. The output voltage V2 of the second row can be expressed as formula (4).

[0087] V2=I2·R ds21 +I2·R ds22 +I2·R ds23 (4)

[0088] Among them, Rds21, Rds22, and Rds23 are the on-resistances of the first switch tube in the second row, the second switch tube in the second row, and the third switch tube in the second row, respectively.

[0089] In the third branch, the reference ground is connected to the power supply voltage through the third row first switch tube, the third row second switch tube, the third row third switch tube and the third controllable current source I3 which are connected in series in sequence. The common end of the third controllable current source 13 connected to the third row third switch tube serves as the third row output end to generate a third row output voltage V3. The gates of the third row first switch tube, the third row second switch tube and the third row third switch tube are connected to the gate control voltage V0, and their substrates are respectively connected to the third row first substrate control voltage VG31, the third row second substrate control voltage VG32 and the third row third substrate control voltage VG33.

[0090] By adjusting the substrate control voltages of the first switch tube in the third row, the second switch tube in the third row, and the third switch tube in the third row, the output voltage V3 of the third row can be adjusted. The output voltage V3 of the third row can be expressed as formula (5).

[0091] V3=I3·R ds31 +I3·R ds32 +I3·R ds33 (5)

[0092] Among them, Rds31, Rds32, and Rds33 are the on-resistances of the first switch tube in the third row, the second switch tube in the third row, and the third switch tube in the third row, respectively.

[0093] Combining formulas (3)-(5), we can obtain:

[0094]

[0095] On the basis of other parameters of the switch tube being fixed, since the on-resistance of the switch tube is determined by the substrate control voltage, formula (6) can be transformed into:

[0096]

[0097] In this embodiment of the present invention, the matrix multiplier circuit applied to the magnetic control system uses the substrate control voltage of 9 switching tubes to form a 3×3 matrix, and uses 3 controllable current sources to form a 3×1 current vector, thereby generating a 3×1 output voltage vector, thereby realizing a matrix multiplier. Compared with programmable resistors, this reduces hardware costs and system power consumption, reduces chip area, and improves the feasibility and economy of memory computing.

[0098] Furthermore, the matrix multiplier circuit applied to the magnetic control system can be expanded, using switching tubes to form an N×N matrix, using N controllable current sources to form an N×1 current vector, generating an N×1 output voltage vector, and realizing a matrix multiplier, N≥2.

[0099] The matrix multiplier circuit applied to the magnetic force control system comprises N branches arranged between the power supply voltage and the reference ground;

[0100] Each branch includes N switching tubes and a controllable current source. The reference ground is connected to the power supply voltage through N switching tubes connected in series and a controllable current source. The common end connected to the Nth switching tube and the controllable current source serves as the row output end to generate a row output voltage. The gate of each switching tube is connected to the gate control voltage V0, and the substrate of each switching tube is connected to the corresponding substrate control voltage.

[0101] Specifically, in the first branch, the reference ground is connected to the power supply voltage through the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes and the first controllable current source I1 which are connected in series in sequence. The common end of the first controllable current source I1 connected to the first row of N switch tubes serves as the first row output end to generate the first row output voltage V1. The gates of the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes are connected to the gate control voltage V0, and their substrates are respectively connected to the first row of first substrate control voltage VG11, the first row of second substrate control voltage VG12 to the first row of N substrate control voltage VG1N.

[0102] In the nth branch, the reference ground is connected to the power supply voltage through the first switch tube of the nth row, the second switch tube of the nth row to the Nth switch tube of the nth row and the nth controllable current source In connected in series in sequence, and the common end of the nth controllable current source In connected to the Nth switch tube of the nth row serves as the output end of the nth row to generate the nth row output voltage Vn, and the gates of the first switch tube of the nth row, the second switch tube of the nth row to the Nth switch tube of the nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGn1 of the nth row, the second substrate control voltage VGn2 of the nth row to the Nth substrate control voltage VGnN of the nth row, 1<n<N.

[0103] In the Nth branch, the reference ground is connected to the power supply voltage through the first switch tube of the Nth row, the second switch tube of the Nth row to the Nth switch tube of the Nth row and the Nth controllable current source IN connected in series in sequence, and the common end of the Nth controllable current source IN connected to the Nth switch tube of the Nth row serves as the Nth row output end to generate the Nth row output voltage VN, and the gates of the first switch tube of the Nth row, the second switch tube of the Nth row to the Nth switch tube of the Nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGN1 of the Nth row, the second substrate control voltage VGN2 of the Nth row to the Nth substrate control voltage VGNN of the Nth row.

[0104] In this embodiment of the present invention, the matrix multiplier circuit applied to the magnetic control system uses the substrate control voltage of N×N switching tubes to form an N×N matrix, and uses N controllable current sources to form an N×1 current vector, thereby generating an N×1 output voltage vector, thereby realizing a matrix multiplier. Compared with programmable resistors, this reduces hardware costs and system power consumption, reduces chip area, and improves the feasibility and economy of memory computing.

[0105] Further, such as Fig.12 As shown, the present invention also provides a matrix multiplier circuit applied to a magnetic force control system, wherein the SRAM IMC includes a multiplier and an adder and a data IO unit.

[0106] Multiplier-accumulators are used to implement matrix multiplier circuits to perform matrix multiplication.

[0107] The data IO unit is used to receive the substrate control voltage, gate control voltage, and control signal of the controllable current source transmitted externally, and transmit them to the multiplier to perform matrix multiplication, and transmit the output voltage vector after the matrix multiplication operation to the outside.

[0108] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A sheet-fed inkjet printing device based on magnetic levitation technology, comprising a platform base (100), a plurality of inkjet printing units (200) located on one side of the platform base (100), and a loading mechanism (300) and a unloading mechanism (400) located on the other side of the platform base (100), characterized in that: The platform base (100) is provided with a magnetic suspension annular guide rail (101), a plurality of magnetic suspension movers (102) matched with the magnetic suspension annular guide rail (101), a magnetic suspension annular magnet (103) and a magnetic suspension annular power supply ring (104) installed in the magnetic suspension annular guide rail (101), and a magnetic suspension material platform (105) fixed on the magnetic suspension mover (102) for conveying paper, wherein the magnetic suspension material platform (105) is fixed with a guide support part (106), and when the magnetic suspension mover (102) moves on the magnetic suspension annular guide rail (101), the guide support part (106) supports and guides the magnetic suspension material platform (105).

2. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 1, characterized in that: The magnetic suspension material platform (105) comprises a material platform body (107), a tray mounting plate (108) arranged on the material platform body (107), and an air suction tray (109) arranged on the tray mounting plate (108).

3. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 1, characterized in that: An air suction fan matched with the air suction tray (109) is arranged in the material platform body (107), and air suction tray holes (118) are evenly distributed on the surface of the air suction tray (109).

4. A sheet-fed inkjet printing device based on magnetic levitation technology according to claim 1, 2 or 3, characterized in that: The guide support portion (106) comprises a lateral mounting plate (110) fixedly connected to the material platform body (107), an upper lateral clamping block (111) arranged on the lateral mounting plate (110), a lower support clamping block (112), an upper lateral annular groove (113) arranged on the side of the magnetic suspension annular guide rail (101) and cooperating with the upper lateral clamping block (111), and a lower lateral annular groove (114) cooperating with the lower support clamping block (112).

5. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 4, characterized in that: The lateral mounting plate (110) is also provided with a lower lateral mounting groove (115) located below the lower supporting block (112) and a guide wheel (116) installed in the lower lateral mounting groove (115), and the side surface of the magnetic suspension annular guide rail (101) is provided with a lower lateral annular groove (117) that matches the guide wheel (116).

6. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 5, characterized in that: A push plate assembly (119) is provided on one side of the tray mounting plate (108); The push plate assembly (119) includes: a mounting base plate (120), the mounting base plate (120) is arranged above the tray mounting plate (108), the outer edge surface of the tray mounting plate (108) is fixedly provided with a guide rail (121), a sliding wheel (122) is provided below the mounting base plate (120), the sliding wheel (122) and the guide rail (121) are slidably matched, so that the push plate assembly (119) can slide smoothly along the guide rail (121), a buckle part (123) is provided above the mounting base plate (120), a suction tray (109) is detachably mounted on the buckle part (123), and a loading and unloading push rod (124) is provided on the periphery of the buckle part (123).

7. An inkjet printing device control system, comprising: A sheet-fed inkjet printing device based on magnetic levitation technology as described in claims 1-6, wherein the control system is a magnetic control system, and the magnetic control system adopts a matrix multiplier circuit structure; The matrix multiplier circuit structure includes N branches arranged between a power supply voltage and a reference ground, where N≥2; Each branch includes N switching tubes and a controllable current source. The reference ground is connected to the power supply voltage through N switching tubes connected in series and a controllable current source. The common end connected to the Nth switching tube and the controllable current source serves as the row output end to generate a row output voltage. The gate of each switching tube is connected to the same gate control voltage, and the substrate of each switching tube is connected to the corresponding substrate control voltage.

8. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 7, characterized in that: In the first branch, the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes and the first controllable current source I1 are connected in series in sequence to the power supply voltage, and the common end of the first controllable current source I1 connected to the first row of N switch tubes is used as the first row output end to generate the first row output voltage V1, and the gates of the first row of first switch tubes, the first row of second switch tubes to the first row of N switch tubes are connected to the gate control voltage V0, and their substrates are respectively connected to the first row of first substrate control voltage VG11, the first row of second substrate control voltage VG12 to the first row of N substrate control voltage VG1N.

9. The single-sheet inkjet printing device based on magnetic levitation technology according to claim 8, characterized in that: In the nth branch, the first switch tube in the nth row, the second switch tube in the nth row, the Nth switch tube in the nth row and the nth controllable current source In are connected in series to the power supply voltage, and the common end of the nth controllable current source In connected to the Nth switch tube in the nth row is used as the nth row output end to generate the nth row output voltage Vn, and the gates of the first switch tube in the nth row, the second switch tube in the nth row, the Nth switch tube in the nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGn1 in the nth row, the second substrate control voltage VGn2 in the nth row, and the Nth substrate control voltage VGnN in the nth row, 1<n<N.

10. The sheet-fed inkjet printing device based on magnetic levitation technology according to claim 9, characterized in that: In the Nth branch, the first switch tube of the Nth row, the second switch tube of the Nth row, the Nth switch tube of the Nth row and the Nth controllable current source IN connected in series are connected to the power supply voltage, and the common end of the Nth controllable current source IN connected to the Nth switch tube of the Nth row is used as the Nth row output end to generate the Nth row output voltage VN, and the gates of the first switch tube of the Nth row, the second switch tube of the Nth row, the Nth switch tube of the Nth row are connected to the gate control voltage V0, and their substrates are respectively connected to the first substrate control voltage VGN1 of the Nth row, the second substrate control voltage VGN2 of the Nth row, and the Nth substrate control voltage VGNN of the Nth row.

Images