Auxiliary positioning method, equipment and device for eccentric wheel on spray head plate and storage medium

Abstract

The invention relates to the technical field of ink-jet printing, and discloses an auxiliary positioning method, equipment and device for an eccentric wheel on a spray head plate and a storage medium, and the method comprises the steps: receiving a real-time image of the spray head plate; generating a workpiece coordinate system on the real-time image; a reference eccentric wheel is obtained according to the real-time image, and a first reference line parallel to a first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel is generated in the real-time image; generating a plurality of second reference lines parallel to the first reference line in the real-time image, wherein the spacing distance between the second reference lines is a first distance value; the real-time image, the workpiece coordinate system, the first datum line and the second datum line are displayed in real time, the datum line is added to the image of each eccentric wheel, a worker can conveniently adjust the position of each eccentric wheel according to the datum line till the outer circle of each eccentric wheel is tangent to the corresponding datum line, and the high-quality printing state is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printing, and in particular to an auxiliary positioning method, equipment, device and storage medium for an eccentric wheel on a nozzle plate. Background Art

[0002] In existing inkjet printing equipment, the nozzle is installed in the nozzle plate, and an eccentric wheel is installed on the nozzle plate. The eccentric wheel contacts the positioning surface of the nozzle and is used to adjust and fix the physical position of the nozzle, so as to achieve a splicing distance between nozzles consistent with the theoretical value and obtain higher printing accuracy. Figure 1 As shown, a plurality of positioning holes are installed on the nozzle plate in a herringbone shape, and an eccentric wheel is rotatably connected in each positioning hole and locked by a locking member; Figure 2 As shown, it is required that the contact surface between the outer circles of two adjacent eccentric wheels along the X-axis direction and the nozzle positioning surface (such as Figure 2 The distance L between the two adjacent nozzles along the X-axis direction needs to be equal to the optimal theoretical distance value of the nozzle, and the error is controlled within 0.01mm to ensure that the spacing between the two adjacent nozzles along the X-axis direction reaches the optimal theoretical splicing distance value, achieve seamless splicing, and print high-quality patterns.

[0003] In order to save time for printing adjustment, the position of the eccentric wheel needs to be adjusted and positioned before the nozzle plate is installed on the machine. The existing method for adjusting and positioning the eccentric wheel position is generally to use a high-precision fixture, first install and fix the fixture on the nozzle plate, and then use a tool such as an allen key to rotate the eccentric wheel. When the eccentric wheel is felt to contact the high-precision positioning surface of the fixture, the eccentric wheel is locked.

[0004] However, the above-mentioned method of adjusting and positioning the eccentric wheel position is extremely dependent on the machining accuracy of the jig. The positioning surface of the jig requires very high machining accuracy, and the machining of the jig has certain difficulty and uncertainty. When an error occurs at the machining source of the jig, it will cause a series of errors afterwards, which may easily lead to a certain error between the final adjusted positioning position of the eccentric wheel and the theoretical value. When the two nozzles are spliced ​​and the colors are superimposed, it is easy to have defects such as splicing lines, color differences, and nozzle marks that cannot be eliminated, thereby reducing the printing quality. Summary of the invention

[0005] In view of this, the present invention provides an auxiliary positioning method, equipment, device and storage medium for an eccentric wheel on a nozzle plate, which can overcome the technical problem that the method for adjusting and positioning the position of the eccentric wheel in the prior art is extremely dependent on the processing accuracy of the fixture, which easily leads to a certain error between the final adjusted positioning position of the eccentric wheel and the theoretical value, thereby reducing the printing quality.

[0006] A first aspect of the present invention provides an auxiliary positioning method for an eccentric wheel on a nozzle plate, wherein the nozzle plate includes a plurality of positioning holes and an eccentric wheel arranged in the positioning holes, and the method includes: receiving a real-time image of the nozzle plate; generating a workpiece coordinate system on the real-time image; acquiring a reference eccentric wheel according to the real-time image, and generating a first reference line in the real-time image that is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel; generating a plurality of second reference lines in the real-time image that are parallel to the first reference line and spaced apart by a first distance value; and displaying the real-time image, the workpiece coordinate system, the first reference line, and the second reference line in real time.

[0007] In an optional embodiment, generating a workpiece coordinate system on the real-time image includes: generating a drawing area corresponding to the real-time image; capturing a first positioning hole and a second positioning hole in the real-time image; generating a first positioning hole contour and a second positioning hole contour at corresponding positions on the drawing area; generating a first coordinate axis in the drawing area based on the center of the first positioning hole contour and the center of the second positioning hole contour; generating a second coordinate axis perpendicular to the first coordinate axis in the drawing area; and synchronously generating the first coordinate axis and the second coordinate axis in corresponding positions of the real-time image.

[0008] In an optional embodiment, a reference eccentric wheel is acquired according to the real-time image, and a first reference line parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel is generated in the real-time image, including: capturing the reference eccentric wheel according to the real-time image; generating a reference eccentric wheel contour at a corresponding position in the drawing area; generating a first reference line parallel to the first coordinate axis and tangent to the reference eccentric wheel contour on the drawing area; and synchronously generating the first reference line in a corresponding position of the real-time image.

[0009] In an optional embodiment, a plurality of second baselines parallel to the first baseline and spaced apart by a first distance value are generated in the real-time image, including: generating a plurality of second baselines parallel to the first baseline and spaced apart by the first distance value in the drawing area; and synchronously generating the second baselines to corresponding positions in the real-time image.

[0010] In an optional embodiment, after generating a plurality of second baselines parallel to the first baseline and spaced apart by a first distance value in the real-time image, it further includes: judging whether the machining error of the positioning hole is greater than the adjustment threshold of the eccentric wheel according to the position of the positioning hole; if it is greater than the adjustment threshold of the eccentric wheel, obtaining a second baseline corresponding to the positioning hole with a machining error greater than the adjustment threshold; determining a calibration distance according to the nozzle spacing and machining error of two adjacent nozzles in the nozzle; and generating a third baseline in the real-time image that is parallel to the second baseline and spaced apart by the calibration distance.

[0011] In an optional embodiment, the calibration distance is an integer multiple of the nozzle spacing, and the calibration distance is less than or equal to the sum of the processing error and the adjustment threshold, and greater than or equal to the difference between the processing error and the adjustment threshold.

[0012] A second aspect of the present invention provides an auxiliary positioning device for an eccentric wheel on a nozzle plate, comprising:

[0013] A measuring device body and a display, a control unit, a moving mechanism and a photographing device arranged on the measuring device body;

[0014] A nozzle plate is fixed in the measuring device body;

[0015] The moving mechanism is connected to the photographing device and is used to drive the photographing device to move in the area above the nozzle plate;

[0016] The photographing device is arranged relatively above the nozzle plate and is used to obtain a real-time image of the nozzle plate;

[0017] The display is used to display the real-time image;

[0018] The control unit is used to execute the auxiliary positioning method of the eccentric wheel on the nozzle plate as described in the first aspect of the present invention.

[0019] A third aspect of the present invention provides an auxiliary positioning device for an eccentric wheel on a nozzle plate, wherein the nozzle plate comprises a plurality of positioning holes and an eccentric wheel disposed in the positioning holes, and the device comprises:

[0020] An image receiving module, used for receiving a real-time image of the printhead plate;

[0021] A coordinate system generating module, used for generating a workpiece coordinate system on the real-time image;

[0022] A first reference line generating module, used for acquiring a reference eccentric wheel according to the real-time image, and generating a first reference line in the real-time image which is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel;

[0023] A second reference line generating module, used for generating a plurality of second reference lines in the real-time image which are parallel to the first reference line and are separated by a first distance value;

[0024] The display module is used to display the real-time image, the workpiece coordinate system, the first reference line and the second reference line in real time.

[0025] A fourth aspect of the present invention provides a computer device, comprising:

[0026] A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the auxiliary positioning method of the eccentric wheel on the nozzle plate as described in the first aspect of the present invention by executing the computer instructions.

[0027] A fifth aspect of the present invention provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable a computer to execute the auxiliary positioning method of the eccentric wheel on the nozzle plate as described in the first aspect of the present invention.

[0028] The auxiliary positioning method, equipment, device and storage medium of the eccentric wheel on the nozzle plate of the present invention have at least the following beneficial effects:

[0029] The present invention generates a workpiece coordinate system on the real-time image by receiving a real-time image of a nozzle plate; obtains a reference eccentric wheel according to the real-time image, and generates a first reference line in the real-time image that is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel; generates a plurality of second reference lines in the real-time image that are parallel to the first reference line and spaced apart by a first distance value; displays the real-time image, the workpiece coordinate system, the first reference line and the second reference line in real time, thereby adding a reference line to the image of each eccentric wheel, making it convenient for staff to adjust the position of each eccentric wheel according to the reference line until the outer circle of each eccentric wheel is tangent to the corresponding reference line, thereby ensuring that the spacing between each nozzle installed one by one on the eccentric wheel reaches the optimal theoretical spacing value of the nozzle, that is, the first distance value, to achieve a high-quality printing state.

[0030] In the process of adjusting the position of the eccentric wheel of the nozzle plate by the method of the embodiment of the present invention, there is no need to use a jig, which can greatly reduce the dependence on the processing accuracy of the jig, effectively avoid the insufficient processing accuracy of the jig and the gradual decrease in the accuracy of the jig after long-term use, resulting in the error between the final adjusted positioning position of the eccentric wheel and the theoretical value, resulting in uneliminated defects such as splicing lines, color differences, and nozzle marks; and because there is no need to use a jig to fix it on the nozzle plate, it can greatly reduce the dependence on the processing accuracy of the nozzle plate, thereby reducing the manufacturing cost of the nozzle plate. At the same time, during the entire process of adjusting the position of the eccentric wheel of the nozzle plate, the shooting device will not contact the nozzle plate, and long-term and multiple adjustments to the position of the eccentric wheel of the nozzle plate will not reduce the accuracy, ensuring high-precision adjustment of the position of the eccentric wheel of the nozzle plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 Schematic diagram of the structure of the nozzle plate;

[0033] Figure 2 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0034] Figure 3 It is a flow chart of the auxiliary positioning method of the eccentric wheel on the nozzle plate according to an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of displaying auxiliary lines in a drawing area according to an embodiment of the present invention;

[0036] Figure 5 It is a structural schematic diagram of an auxiliary positioning device for an eccentric wheel on a nozzle plate according to an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of an auxiliary positioning device of an eccentric wheel on a nozzle plate according to an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the structure of a computer device according to an embodiment of the present invention;

[0039] Description of reference numerals:

[0040] 1-nozzle plate; 11-positioning hole; 12-eccentric wheel; 31-first reference line; 32-second reference line; 2-measuring device body; 21-shooting device; 22-display; 23-measuring platform; 24-moving mechanism; 25-control unit; 601-image receiving module; 602-coordinate system generating module; 603-first reference line generating module; 604-second reference line generating module; 605-display module; 10-processor; 20-memory; 30-communication interface. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, 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 the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 and Figure 2 As shown, in the existing inkjet device, the nozzle is installed in the nozzle plate 1. In order to adjust and fix the position of the nozzle, a high-precision fixture is used to adjust the eccentric wheel 12. This method has the following disadvantages:

[0046] 1. Since the tolerance of the nozzle joint distance is very high, the positioning surface of the fixture also requires high processing accuracy, and the processing of the fixture has certain difficulty and uncertainty.

[0047] 2. Since the fixture is fixed on the nozzle plate 1, the surface of the nozzle plate 1 that contacts the fixture also requires high processing accuracy to obtain an accurate positioning surface. If the processing error of a nozzle plate 1 is too large, it will directly affect the positioning position of the eccentric wheel 12.

[0048] 3. During the multiple assembly, disassembly and adjustment of the jig, its high-precision positioning surface will rub against hard objects. After multiple uses, the positioning surface will affect the positioning accuracy of the eccentric wheel 12 due to wear.

[0049] 4. There is a cumulative error. Since the fixture has a little processing error, each eccentric wheel 12 will produce a certain value of error when adjusted one by one from the first eccentric wheel 12 to the last eccentric wheel 12. The further back, the greater the cumulative error will be.

[0050] 5. The method of judging whether the eccentric wheel 12 is in place by the feeling of human hands is not accurate. It is often difficult to detect whether the human strength is greater or less, and the adjusted position of the eccentric wheel 12 often has a certain error.

[0051] Therefore, the existing eccentric wheel adjustment process method is extremely dependent on processing accuracy. When errors occur at the source of processing, a series of errors will be caused later. Moreover, the accuracy of the fixture gradually decreases as the use time increases. People's sensory judgment will have large errors. These various reasons combined will cause the final positioning position of the eccentric wheel 12 to still have a certain error from the theoretical value. After the nozzle plate 1 is installed on the machine, the operator still needs to spend a lot of time to fine-tune the position of the eccentric wheel 12, which is inefficient. Moreover, if there is a large range of eccentric wheel 12 position errors, it is still difficult to avoid some color overlap errors after fine-tuning, which reduces the printing quality.

[0052] Based on this, the embodiment of the present invention proposes an auxiliary positioning method of an eccentric wheel on a nozzle plate. The nozzle plate 1 includes a plurality of positioning holes 11 and an eccentric wheel 12 arranged in the positioning holes 11. The method can be applied to industrial computers, laptop computers, mobile phones and other smart terminals. Figure 3 and Figure 4 As shown in the figure, the auxiliary positioning method of the eccentric wheel on the nozzle plate includes the following steps:

[0053] Step S301 , receiving a real-time image of the nozzle plate 1 .

[0054] Specifically, the range of the real-time image includes the entire range of the nozzle plate 1 , and displays the outline of the nozzle plate 1 , the positioning holes 11 on the nozzle plate 1 , the eccentric wheel 12 and other contents.

[0055] After the eccentric wheel 12 is assembled in the positioning hole 11 on the nozzle plate 1, the position of the nozzle plate 1 is fixed, and a camera is used to collect a real-time image of the nozzle plate 1. The higher the camera pixel, the better the accuracy, and the higher the lens magnification, the better the accuracy. In the embodiment of the present invention, the pixel size is about 0.003mm. The content displayed in the real-time image can be changed by moving the camera. For example, by moving it above one of the positioning holes 11 and moving it downward, the positioning hole 11 can be clearly displayed.

[0056] Step S302, generating a workpiece coordinate system on the real-time image.

[0057] Specifically, after each nozzle plate 1 is fixed, the workpiece coordinate system of the nozzle plate 1 will not always coincide. Therefore, when a new nozzle plate 1 is placed on the fixing plate and fixed, the workpiece coordinate system of this nozzle plate 1 must be set first to facilitate positioning of the positioning hole 11 and the eccentric wheel 12 on the nozzle plate 1, so that the operator can find a certain point on the nozzle plate 1.

[0058] Specifically, the workpiece coordinate system is a two-dimensional coordinate system, wherein the first coordinate axis is the Y axis and the second coordinate axis is the X axis.

[0059] Step S303: acquiring a reference eccentric wheel according to the real-time image, and generating a first reference line 31 in the real-time image which is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel.

[0060] Specifically, the reference eccentric wheel is a pre-set eccentric wheel 12. Exemplarily, the reference eccentric wheel is the leftmost eccentric wheel 12 on the nozzle plate 1, and its optimal rotation position is the midpoint of the adjustment threshold. The adjustment threshold is the maximum adjustment distance of the eccentric wheel 12. The rotation center and the center of the circle of each eccentric wheel 12 do not overlap. Therefore, when the eccentric wheel 12 rotates, the value of the projection of its rightmost point on the Y axis will change continuously. When the value of the projection on the Y axis is the maximum, the eccentric wheel 12 reaches the adjustment threshold.

[0061] Specifically, by the position of the reference eccentric wheel, the camera is controlled to move to the relative upper side thereof, so that the reference eccentric wheel can be clearly displayed, so as to facilitate the generation of a first reference line 31 which is parallel to the first coordinate axis of the workpiece coordinate system, i.e., the X-axis, and tangent to the reference eccentric wheel. The first reference line 31 can be tangent to the left or right side of the reference eccentric wheel, depending on the relative position of the nozzle and the eccentric wheel 12. In this embodiment, when the nozzle is located on the right side of the eccentric wheel 12, the first reference line 31 is tangent to the right side of the reference eccentric wheel, so that when the nozzle is directly mounted on the nozzle plate 1, the reference eccentric wheel can be brought into contact with the nozzle positioning surface to fix the physical position of the nozzle.

[0062] Step S304: generating a plurality of second reference lines 32 in the real-time image which are parallel to the first reference line 31 and are spaced apart by a first distance value.

[0063] Specifically, the first distance value is a preset theoretical value of an optimal distance between two nozzles, wherein the first distance value is an integer multiple of the nozzle distance on the nozzle.

[0064] The second reference line 32 may be located on the left or right side of the first reference line 31. In this embodiment, the reference eccentric wheel is the leftmost eccentric wheel 12 on the nozzle plate 1, so the first reference line 31 is located on the left side of the real-time image, and the second reference line 32 is located on the right side of the first reference line 31. In other embodiments, the first reference line 31 may also be set on the right side or in the middle, and the position of the second reference line 32 may be adjusted accordingly.

[0065] By generating the second reference line 32, the rotational position of each eccentric wheel 12 is calibrated. The eccentric wheel 12 only needs to be rotated until its right edge is tangent to the second reference line 32, thereby ensuring that the distance between two adjacent nozzles also reaches the first distance value, that is, the optimal theoretical distance value.

[0066] Step S305 , displaying the real-time image, the workpiece coordinate system, the first reference line 31 and the second reference line 32 in real time.

[0067] Specifically, the workpiece coordinate system, the first reference line 31 and the second reference line 32 are displayed in the real-time image, and the real-time image can change according to the position of the camera. For example, when it is necessary to rotate a certain eccentric wheel 12, the camera is moved to the top of the eccentric wheel 12 to display it, and the eccentric wheel 12 is adjusted according to the second reference line 32. The eccentric wheel 12 is rotated using a tool such as a hexagonal key so that the outer circle of the eccentric wheel 12 is tangent to the corresponding second reference line 32, and the position of the eccentric wheel 12 is locked. At this time, the adjustment of one of the eccentric wheels 12 is completed. By analogy, the remaining eccentric wheels 12 of the nozzle plate 1 are adjusted to be tangent to their respective reference lines. At this time, the outer circle tangent spacing of each eccentric wheel 12 is equal to the theoretical value of the optimal spacing of the nozzle. After the nozzle is installed, the spacing between each two adjacent nozzles is consistent with the theoretical value of the optimal spacing, and the error is within 0.01mm, which can achieve a high-quality printing state.

[0068] An auxiliary positioning method for an eccentric wheel on a nozzle plate according to an embodiment of the present invention generates a workpiece coordinate system on the real-time image by receiving a real-time image of the nozzle plate 1; a reference eccentric wheel is obtained according to the real-time image, and a first reference line 31 parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel is generated in the real-time image; a plurality of second reference lines 32 parallel to the first reference line 31 and spaced apart by a first distance value are generated in the real-time image; the real-time image, the workpiece coordinate system, the first reference line 31 and the second reference line 32 are displayed in real time, and a reference line is added to the image of each eccentric wheel 12, so that the staff can adjust the position of each eccentric wheel 12 according to the reference line until the outer circle of each eccentric wheel 12 is tangent to the corresponding reference line, thereby ensuring that the spacing between each nozzle installed one by one on the eccentric wheel 12 reaches the optimal theoretical spacing value of the nozzle, that is, the first distance value, to achieve a high-quality printing state.

[0069] In the process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1 by the method of the embodiment of the present invention, there is no need to use a jig, which can greatly reduce the dependence on the processing accuracy of the jig, effectively avoid the insufficient processing accuracy of the jig and the gradual decrease in the accuracy of the jig after long-term use, resulting in the error between the final adjusted positioning position of the eccentric wheel 12 and the theoretical value, resulting in uneliminated defects such as splicing lines, color differences, and nozzle marks; and because there is no need to use a jig to fix on the nozzle plate 1, it can greatly reduce the dependence on the processing accuracy of the nozzle plate 1, thereby reducing the manufacturing cost of the nozzle plate 1. At the same time, during the entire process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1, there will be no contact with the nozzle plate 1, and long-term and multiple adjustments to the position of the eccentric wheel 12 of the nozzle plate 1 will not reduce the accuracy, ensuring high-precision adjustment of the position of the eccentric wheel 12 of the nozzle plate 1.

[0070] In some optional embodiments, step S302, generating a workpiece coordinate system on the real-time image, includes:

[0071] Step S3021, generating a drawing area corresponding to the real-time image.

[0072] Specifically, the real-time image display area and the drawing area are two different display windows, and the relative position and size of the captured elements are 1:1 with the real object. The drawing area is separate from the image display area, and the relative position of the two different windows can be set at will, and they are displayed on one interface at the same time, which is convenient for operation.

[0073] Step S3022, capturing the first positioning hole and the second positioning hole in the real-time image.

[0074] Specifically, the first positioning hole and the second positioning hole are two pre-set positioning holes 11. Exemplarily, the first positioning hole and the second positioning hole are two positioning holes 11 on the left side of the nozzle plate 1. The camera is controlled to move to the top of the first positioning hole and the second positioning hole according to the preset moving path to obtain their clear contours, so that the first positioning hole and the second positioning hole are clearly displayed in the real-time image, which is convenient for capturing the first positioning hole and the second positioning hole.

[0075] Step S3023, generating a first positioning hole outline and a second positioning hole outline at corresponding positions on the drawing area.

[0076] Specifically, the outer circular edges of the first positioning hole and the second positioning hole are captured by visual measurement software, and then the first positioning hole contour and the second positioning hole contour are generated in the drawing area.

[0077] Step S3024: Generate a first coordinate axis in the drawing area based on the center of the first positioning hole contour and the center of the second positioning hole contour.

[0078] After generating the first positioning hole outline and the second positioning hole outline, capture the center of the first positioning hole outline and the center of the second positioning hole outline, connect the two centers, and extend them to both ends until they fill the drawing area, thereby generating the first coordinate axis, namely the Y axis.

[0079] Step S3025, generating a second coordinate axis perpendicular to the first coordinate axis in the drawing area.

[0080] Specifically, take any point on the first coordinate axis and draw a straight line perpendicular to the first coordinate axis, remembering to the second coordinate axis, that is, the X axis.

[0081] Exemplarily, the second coordinate axis is obtained by taking the center of the first positioning hole contour as the starting point and drawing a straight line perpendicular to the first coordinate axis.

[0082] Step S3026, synchronously generate the first coordinate axis and the second coordinate axis to corresponding positions of the real-time image.

[0083] Specifically, if you capture the corresponding circle, straight line and other elements in the display area of ​​the real-time image, the corresponding elements will not only be displayed in the display area of ​​the real-time image, but also in the drawing area at a 1:1 ratio. If you draw auxiliary lines in the drawing area, such as the first coordinate axis and the second coordinate axis, corresponding auxiliary lines will also be generated in the image display area. Since the image display area cannot be operated to zoom in and out, but the drawing area can, it is more convenient to draw auxiliary lines in the drawing area.

[0084] In some optional embodiments, step S303, obtaining a reference eccentric wheel according to the real-time image, and generating a first reference line 31 parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel in the real-time image, includes:

[0085] Step S3031, capturing a reference eccentric wheel based on a real-time image.

[0086] Specifically, the reference eccentric wheel is a pre-set eccentric wheel 12. Preferably, the reference eccentric wheel is located in the first positioning hole.

[0087] The position of the reference eccentric wheel is acquired in advance, and then the real-time image is enlarged to obtain a clear image of the reference eccentric wheel, or the camera is moved to a position relatively above the reference eccentric wheel to obtain a clear image of the reference eccentric wheel, and the outer circle of the reference eccentric wheel is captured based on the visual measurement software.

[0088] Step S3032, generating a reference eccentric wheel profile at a corresponding position in the drawing area.

[0089] Specifically, a reference eccentric wheel profile is generated at a 1:1 ratio according to the captured outer circle of the reference eccentric wheel at a corresponding position in the drawing area.

[0090] Step S3033: Generate a first reference line 31 in the drawing area that is parallel to the first coordinate axis and tangent to the reference eccentric wheel profile.

[0091] Specifically, the rightmost point is captured from the reference eccentric wheel profile, and then a first reference line 31 parallel to the first coordinate axis is made through the point.

[0092] Step S3034, synchronously generate the first reference line 31 to the corresponding position of the real-time image.

[0093] By generating a reference eccentric wheel profile in the drawing area and generating the first reference line 31 based thereon and then synchronizing it to the corresponding position of the real-time image, it is convenient to draw the first reference line 31 and make the first reference line 31 more accurate.

[0094] In some optional embodiments, step S304, generating a plurality of second reference lines 32 in the real-time image that are parallel to the first reference line 31 and spaced apart by a first distance value, includes:

[0095] Step S3041 , generating a plurality of second reference lines 32 in the drawing area which are parallel to the first reference line 31 and are spaced apart by a first distance value.

[0096] Step S3042, synchronously generate the second reference line 32 to the corresponding position of the real-time image.

[0097] Specifically, the interval between the first second reference line 32 and the first reference line 31 is the first distance value, and the interval between adjacent second reference lines 32 is the first distance value, so that the second reference lines 32 are spread over the entire drawing area. The second reference lines 32 generated in the drawing area are synchronously generated to the corresponding positions of the real-time image, so that the operator can observe the real-time position of the eccentric wheel 12 and the relative position of the second reference lines 32, thereby assisting the rotation of the eccentric wheel 12.

[0098] It can be understood that after observing the real-time position of the eccentric wheel 12 and the relative position of the second reference line 32, the operator rotates each eccentric wheel 12 so that each eccentric wheel 12 rotates according to the corresponding second reference line 32 until the outer circle is tangent to the second reference line 32. In this way, after the nozzle is assembled on the nozzle plate 1, the distance of each nozzle is the first distance value, that is, the optimal theoretical value, thereby achieving high-quality printing quality.

[0099] The embodiment of the present invention provides an auxiliary positioning method for an eccentric wheel on a nozzle plate, which is applied to the case where all nozzles on the nozzle do not need to be opened at the same time. Specifically, after generating a plurality of second reference lines 32 parallel to the first reference line 31 and spaced apart by a first distance value in a real-time image, the method further includes:

[0100] Step S501 , judging whether the machining error of the positioning hole 11 is greater than the adjustment threshold of the eccentric wheel 12 according to the position of the positioning hole 11 .

[0101] Specifically, the processing error is the deviation value between the actual processing and the theoretical processing position. The distance between two adjacent positioning holes 11 in the theoretical processing position is the first distance value, but an error may occur during actual processing. The processing deviation can be determined by manually measuring the distance between the center of the positioning hole 11 and the corresponding second reference line 32. For example, when there is no processing error, the distance between the center of the positioning hole 11 and the corresponding second reference line 32 is a, and the distance between the center of the positioning hole 11 and the corresponding second reference line 32 obtained by actual measurement is b, then the processing error is ba.

[0102] When the machining error of the positioning hole 11 is greater than the adjustment threshold of the eccentric wheel 12 , the eccentric wheel 12 disposed in the positioning hole 11 cannot be rotated to be tangent to the second reference line 32 .

[0103] Step S502: If it is greater than the adjustment threshold of the eccentric wheel 12, then the second reference line 32 corresponding to the positioning hole 11 with a processing error greater than the adjustment threshold is obtained.

[0104] By acquiring the corresponding second reference line 32 , the third reference line can be generated according to the second reference line 32 .

[0105] Step S503, determining a calibration distance according to a nozzle spacing between two adjacent nozzles in the nozzle and a processing error.

[0106] Specifically, each nozzle is provided with a plurality of nozzles arranged at intervals, and the nozzle spacing between each two adjacent nozzles in the nozzle is consistent. The calibration distance is an integer multiple of the nozzle spacing, and the larger the processing error, the larger the multiple, so as to ensure that the third reference line generated thereby can be tangent to the eccentric wheel 12.

[0107] Step S504: Generate a third reference line in the real-time image that is parallel to the second reference line 32 and separated by a calibration distance.

[0108] Specifically, the calibration distance is an integer multiple of the nozzle spacing, and the calibration distance is less than or equal to the sum of the processing error and the adjustment threshold, and greater than or equal to the difference between the processing error and the adjustment threshold. By moving the calibration distance to generate the third reference line, the eccentric wheel 12 can be rotated to make the eccentric wheel 12 and the third reference line tangent, and ensure that the distance between the third reference line and the second reference line 32 is an integer multiple of the nozzle spacing.

[0109] According to the relative positions of the third reference line and the eccentric wheel 12 displayed in the real-time image, the operator rotates the eccentric wheel 12 to make the eccentric wheel 12 and the third reference line tangent. The eccentric wheel 12 adjusted in this way can make the spacing between the nozzles on the adjacent nozzle plate 1 equal to the first distance value plus several times the nozzle spacing. In this case, the printing effect and printing quality will not be affected.

[0110] In the existing method of adjusting the position of the eccentric wheel 12 by a fixture, it is extremely dependent on the processing accuracy of the positioning hole 11. Once a large error occurs in the processing of the positioning hole 11, it can only be reprocessed. The method of the present invention can compensate for the processing error and can make an unqualified nozzle plate 1 become a usable product.

[0111] For example, each nozzle is provided with a number of nozzles arranged at intervals. Since the nozzle spacing between two adjacent nozzles in the nozzle is consistent, for example, a 400dpi nozzle has a nozzle spacing of 25.4 / 400=0.0635mm, and there are 1024 nozzles. When all nozzles are fully opened, the printing range can cover an area of ​​1024*0.0635≈65mm, but in actual use, the printing area generally only requires 64.2mm, so it is not actually necessary to use all 1024 nozzles. The nozzle area can be adjusted in the printing software. For example, when a 64.2mm area needs to be printed, only 64.2 / 0.0635=1011 nozzles need to be opened in the software, and when a 64.45mm area needs to be printed, 64.45 / 0.0635=1015 nozzles can be opened in the software. Therefore, when the printing areas of two nozzles are spliced, as long as the splicing spacing is an integer multiple of 0.0635, it will not have any impact on the printing effect and quality.

[0112] By utilizing this characteristic of the splicing of adjacent nozzles and using the method of the embodiment of the present invention, it is possible to compensate for processing errors. For example, a processing error of +0.3mm occurs at the center of the positioning hole 11 of one of the eccentric wheels 12 on the nozzle plate 1. If the adjustment threshold of the eccentric wheel 12 is 0.1mm, when adjusting the eccentric wheel 12 according to the second reference line 32, it will be found that no matter to which angle the eccentric wheel 12 is turned, it cannot be tangent to the second reference line 32.

[0113] At this time, a new third reference line can be made to compensate for the processing error. A third reference line parallel to the second reference line 32 and with a spacing of 0.0635*5=0.3175 can be made on the drawing area. At this time, the eccentric wheel 12 can be adjusted to a state of being tangent to the third reference line. When the nozzle is installed at this position, the spacing between it and the front nozzle is still an integer multiple of 0.0635. After adjusting the number of nozzles opened, there will be no impact on the printing effect and quality.

[0114] The auxiliary positioning method of the eccentric wheel on the nozzle plate of the embodiment of the present invention has the following advantages:

[0115] By adjusting the eccentric wheel 12 with the aid of real-time images, the dependence of the nozzle plate 1 on the processing accuracy is greatly reduced, thereby reducing the manufacturing cost of the nozzle plate 1. It is more intuitive and accurate to judge whether the eccentric wheel 12 has been adjusted in place through vision on the real-time image. The error is usually only one pixel error, and one pixel is about 0.003mm in this example. This error does not affect the printing accuracy.

[0116] There is no cumulative error, because the distance between the first reference line 31 and the adjacent second reference line 32, and the distance between two adjacent second reference lines 32 are consistent with the theoretical value, and each eccentric wheel 12 is adjusted corresponding to its own second reference line 32, so there is no cumulative error;

[0117] By adding the third reference line, when there is an error in the processing of the nozzle plate 1, the error can be compensated and a defective product can be turned into a qualified product.

[0118] The present invention also provides an auxiliary positioning device for the eccentric wheel 12 on the nozzle plate 1, such as Figure 5 As shown, the auxiliary positioning device of the eccentric wheel 12 on the nozzle plate 1 includes:

[0119] A measuring device body 2 and a display 22, a control unit 25, a moving mechanism 24 and a photographing device 21 arranged on the measuring device body 2; a nozzle plate 1 is fixed in the measuring device body 2; the moving mechanism 24 is connected to the photographing device 21, and is used to drive the photographing device 21 to move in the upper area of ​​the nozzle plate 1; the photographing device 21 is arranged relatively above the nozzle plate 1, and is used to obtain a real-time image of the nozzle plate 1; the display 22 is used to display the real-time image; the control unit 25 is used to execute the auxiliary positioning method of the eccentric wheel on the nozzle plate as in the above embodiment.

[0120] Specifically, the measuring device body 2 includes a measuring platform 23 and a fixing device, and each eccentric wheel 12 is mounted on the nozzle plate 1, and the nozzle plate 1 is fixed on the measuring platform 23 of the measuring device through the fixing device. The nozzle plates 1 of different specifications can be adjusted to a suitable position on the measuring platform 23, and then the nozzle plates 1 are locked, so that the nozzle plates 1 do not move relative to each other during the adjustment process. The control unit 25 is connected to input devices such as a mouse and a keyboard, and relevant control instructions are input through input devices such as a mouse and a keyboard.

[0121] The shooting device 21 uses a high-precision camera. The higher the camera pixel, the better the precision. The higher the lens magnification, the better the precision. In the embodiment of the present invention, the pixel size is about 0.003 mm.

[0122] The moving mechanism 24 adopts a three-axis motion mechanism to drive the adjustment of the camera on the X, Y, and Z axes, and the linear motion accuracy is extremely high, generally within 0.002mm. By reading the displacement value on the scale sensor, various measurement functions or line drawing functions can be realized. In addition, the movement of the camera can be achieved in two ways. The first is to manually control its forward, backward, left, right, up and down movement on the measurement software. The second is to run the pre-set program through a pre-set program. The camera lens will automatically move to the first point. After executing the measurement process of the first point, it will automatically move to the next point, and so on. The content of the real-time image captured by the camera includes the entire range of the nozzle plate 1, which displays the outline of the nozzle plate 1, the positioning hole 11 on the nozzle plate 1, the eccentric wheel 12 and other contents.

[0123] The control unit 25 executes the auxiliary positioning method of the eccentric wheel on the nozzle plate as in the above-mentioned embodiment, and the specific execution steps are not repeated. The function of the control unit 25 is to add various auxiliary lines such as the first reference line 31 and the second reference line 32 to the real-time image, and the display screen displays the real-time image after adding the auxiliary lines in real time. When it is necessary to rotate a certain eccentric wheel 12, the camera is moved to the top of the eccentric wheel 12 to display it, the eccentric wheel 12 is adjusted according to the second reference line 32, and the eccentric wheel 12 is rotated using a tool such as a hexagonal key so that the outer circle of the eccentric wheel 12 is tangent to the corresponding second reference line 32, and the position of the eccentric wheel 12 is locked. At this time, the adjustment of one of the eccentric wheels 12 is completed, and by analogy, the remaining eccentric wheels 12 of the nozzle plate 1 are adjusted to be tangent to their respective reference lines. At this time, the outer circle tangent spacing of each eccentric wheel 12 is equal to the theoretical value of the optimal spacing of the nozzle. After the nozzle is installed, the spacing between every two adjacent nozzles is consistent with the theoretical value of the optimal spacing, and the error is within 0.01mm, which can achieve high-quality printing.

[0124] An auxiliary positioning device for the eccentric wheel 12 on a nozzle plate 1 according to an embodiment of the present invention obtains real-time images through structures such as a display 22, a control unit 25, a moving mechanism 24 and a shooting device 21, and adds a reference line on the image of each eccentric wheel 12, so that the staff can adjust the position of each eccentric wheel 12 according to the reference line until the outer circle of each eccentric wheel 12 is tangent to the corresponding reference line, thereby ensuring that the spacing between each nozzle installed one by one on the eccentric wheel 12 reaches the optimal theoretical spacing value of the nozzle, that is, the first distance value, to achieve a high-quality printing state.

[0125] In the process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1 by using the embodiment of the present invention, there is no need to use a jig, which can greatly reduce the dependence on the processing accuracy of the jig, effectively avoid the insufficient processing accuracy of the jig and the gradual decrease in the accuracy of the jig after long-term use, resulting in errors between the final adjusted positioning position of the eccentric wheel 12 and the theoretical value, which still cause defects such as splicing and overlapping colors; and because there is no need to use a jig to fix on the nozzle plate 1, it can greatly reduce the dependence on the processing accuracy of the nozzle plate 1, thereby reducing the manufacturing cost of the nozzle plate 1. At the same time, in the whole process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1, the core components of the equipment have no contact with the nozzle plate 1 throughout the whole process, and there is almost no loss. Long-term use will not reduce the accuracy, ensuring high-precision adjustment of the position of the eccentric wheel 12 of the nozzle plate 1.

[0126] The embodiment of the present invention further provides an auxiliary positioning device for the eccentric wheel 12 on the nozzle plate 1. The nozzle plate 1 includes a plurality of positioning holes 11 and the eccentric wheel 12 disposed in the positioning holes 11. Figure 6 As shown, the device comprises:

[0127] The image receiving module 601 is used to receive the real-time image of the nozzle plate 1. The specific content is the same as that of the above method embodiment, and will not be repeated here.

[0128] The coordinate system generating module 602 is used to generate a workpiece coordinate system on the real-time image. The specific content is the same as that of the above method embodiment, and will not be repeated here.

[0129] The first reference line generation module 603 is used to obtain the reference eccentric wheel according to the real-time image, and generate the first reference line 31 parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel in the real-time image. The specific content is the same as the above method embodiment, and will not be repeated here.

[0130] The second reference line generation module 604 is used to generate a plurality of second reference lines 32 in the real-time image that are parallel to the first reference line 31 and spaced apart by a first distance value. The specific contents are the same as those in the above method embodiment and will not be described again.

[0131] The display module 605 is used to display the real-time image, the workpiece coordinate system, the first reference line 31 and the second reference line 32 in real time. The specific content is the same as the above method embodiment, and will not be repeated here.

[0132] The embodiment of the present invention generates a workpiece coordinate system on the real-time image by receiving a real-time image of the nozzle plate 1; obtains a reference eccentric wheel according to the real-time image, and generates a first reference line 31 in the real-time image that is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel; generates a plurality of second reference lines 32 in the real-time image that are parallel to the first reference line 31 and spaced apart by a first distance value; displays the real-time image, the workpiece coordinate system, the first reference line 31 and the second reference line 32 in real time, and adds a reference line to the image of each eccentric wheel 12, so that the staff can adjust the position of each eccentric wheel 12 according to the reference line until the outer circle of each eccentric wheel 12 is tangent to the corresponding reference line, thereby ensuring that the spacing between each nozzle installed one by one on the eccentric wheel 12 reaches the optimal theoretical spacing value of the nozzle, that is, the first distance value, and achieving a high-quality printing state.

[0133] In the process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1 by using the embodiment of the present invention, there is no need to use a jig, which can greatly reduce the dependence on the processing accuracy of the jig, effectively avoid the insufficient processing accuracy of the jig and the gradual decrease in the accuracy of the jig after long-term use, resulting in errors between the final adjusted positioning position of the eccentric wheel 12 and the theoretical value, which still cause defects such as splicing and overlapping colors; and because there is no need to use a jig to fix on the nozzle plate 1, it can greatly reduce the dependence on the processing accuracy of the nozzle plate 1, thereby reducing the manufacturing cost of the nozzle plate 1. At the same time, during the entire process of adjusting the position of the eccentric wheel 12 of the nozzle plate 1, there will be no contact with the nozzle plate 1, and long-term and multiple adjustments to the position of the eccentric wheel 12 of the nozzle plate 1 will not reduce the accuracy, ensuring high-precision adjustment of the position of the eccentric wheel 12 of the nozzle plate 1.

[0134] In an optional embodiment, the coordinate system generating module 602 includes:

[0135] The drawing area generation module is used to generate a drawing area corresponding to the real-time image.

[0136] The first capturing module is used to capture the first positioning hole and the second positioning hole in the real-time image.

[0137] The first contour generating module is used to generate a first positioning hole contour and a second positioning hole contour at corresponding positions on the drawing area.

[0138] The first coordinate axis generating module is used to generate a first coordinate axis in the drawing area based on the center of the first positioning hole contour and the center of the second positioning hole contour.

[0139] The second coordinate axis generating module generates a second coordinate axis perpendicular to the first coordinate axis in the drawing area.

[0140] The first synchronization module is used to synchronously generate the first coordinate axis and the second coordinate axis to corresponding positions of the real-time image.

[0141] In an optional embodiment, the first reference line generating module 603 includes:

[0142] The second capturing module is used to capture the reference eccentric wheel according to the real-time image.

[0143] The second contour generating module is used to generate a reference eccentric wheel contour at a corresponding position in the drawing area.

[0144] The tangent module is used to generate a first reference line 31 on the drawing area which is parallel to the first coordinate axis and tangent to the reference eccentric wheel contour.

[0145] The second synchronization module is used to synchronously generate the first reference line 31 to a corresponding position of the real-time image.

[0146] In an optional embodiment, the second reference line generating module 604 includes:

[0147] A parallel spacing module, used for generating a plurality of second reference lines 32 in the drawing area that are parallel to the first reference line 31 and are spaced apart by a first distance value;

[0148] The second synchronization module is used to synchronously generate the second reference line 32 to a corresponding position of the real-time image.

[0149] In an optional embodiment, the auxiliary positioning device of the eccentric wheel 12 on the nozzle plate 1 further includes:

[0150] The error judgment module is used to judge whether the machining error of the positioning hole 11 is greater than the adjustment threshold of the eccentric wheel 12 according to the position of the positioning hole 11 .

[0151] The reference line acquisition module is used to acquire the second reference line 32 corresponding to the positioning hole 11 whose processing error is greater than the adjustment threshold if it is greater than the adjustment threshold of the eccentric wheel 12.

[0152] The distance determination module is used to determine the calibration distance according to the nozzle spacing and processing error of two adjacent nozzles in the nozzle.

[0153] The third reference line generating module is used to generate a third reference line in the real-time image which is parallel to the second reference line 32 and is spaced by a calibration distance.

[0154] In an optional embodiment, the calibration distance is an integer multiple of the nozzle spacing, and the calibration distance is less than or equal to the sum of the processing error and the adjustment threshold, and greater than or equal to the difference between the processing error and the adjustment threshold.

[0155] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0156] The auxiliary positioning device of the eccentric wheel 12 on the nozzle plate 1 in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor 10 and a memory 20 that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0157] See also Figure 7 , Figure 7 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 7 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor 10 can process instructions executed in the computer device, including instructions stored in or on the memory 20 to display graphical information of a GUI on an external input / output device (such as a display device coupled to an interface). In some optional embodiments, if necessary, multiple processors 10 and / or multiple buses can be used together with multiple memories 20 and multiple memories 20. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 7 A processor 10 is taken as an example.

[0158] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0159] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0160] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory 20 remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0161] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0162] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0163] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0164] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for auxiliary positioning of an eccentric wheel on a nozzle plate, characterized in that: The nozzle plate includes a plurality of positioning holes and an eccentric wheel disposed in the positioning holes, and the method includes: Receive real-time images of the printhead plate; generating a workpiece coordinate system on the real-time image; Acquire a reference eccentric wheel according to the real-time image, and generate a first reference line in the real-time image that is parallel to a first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel; Generating a plurality of second reference lines in the real-time image that are parallel to the first reference line and spaced apart by a first distance value; The real-time image, the workpiece coordinate system, the first reference line and the second reference line are displayed in real time.

2. The method according to claim 1, characterized in that The step of generating a workpiece coordinate system on the real-time image comprises: generating a drawing area corresponding to the real-time image; capturing the first positioning hole and the second positioning hole in the real-time image; generating a first positioning hole outline and a second positioning hole outline at corresponding positions on the drawing area; generating a first coordinate axis in the drawing area based on the center of the first positioning hole outline and the center of the second positioning hole outline; Generating a second coordinate axis perpendicular to the first coordinate axis in the drawing area; The first coordinate axis and the second coordinate axis are synchronously generated in corresponding positions of the real-time image.

3. The method according to claim 2, characterized in that Acquiring a reference eccentric wheel according to the real-time image, and generating a first reference line in the real-time image that is parallel to a first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel, including: capturing a reference eccentric according to the real-time image; generating a reference eccentric wheel profile at a corresponding position in the drawing area; Generating a first reference line on the drawing area that is parallel to the first coordinate axis and tangent to the reference eccentric wheel profile; The first reference line is synchronously generated at a corresponding position of the real-time image.

4. The method according to claim 3, characterized in that Generating a plurality of second reference lines in the real-time image that are parallel to the first reference line and spaced apart by a first distance value, comprising: Generating a plurality of second reference lines in the drawing area that are parallel to the first reference line and spaced apart by a first distance value; The second reference line is synchronously generated at a corresponding position of the real-time image.

5. The method according to claim 1, characterized in that After generating a plurality of second reference lines in the real-time image that are parallel to the first reference line and spaced apart by a first distance value, the method further includes: Determining whether a machining error of the positioning hole is greater than an adjustment threshold of the eccentric wheel according to the position of the positioning hole; If it is greater than the adjustment threshold of the eccentric wheel, then obtaining and processing a second reference line corresponding to the positioning hole whose error is greater than the adjustment threshold; The calibration distance is determined according to the nozzle spacing and the processing error of two adjacent nozzles in the nozzle; A third reference line is generated in the real-time image, which is parallel to the second reference line and separated from the second reference line by a calibration distance.

6. The method according to claim 5, characterized in that The calibration distance is an integer multiple of the nozzle spacing, and the calibration distance is less than or equal to the sum of the processing error and the adjustment threshold, and greater than or equal to the difference between the processing error and the adjustment threshold.

7. An auxiliary positioning device for an eccentric wheel on a nozzle plate, characterized in that: include: A measuring device body and a display, a control unit, a moving mechanism and a photographing device arranged on the measuring device body; A nozzle plate is fixed in the measuring device body; The moving mechanism is connected to the photographing device and is used to drive the photographing device to move in the area above the nozzle plate; The photographing device is arranged relatively above the nozzle plate and is used to obtain a real-time image of the nozzle plate; The display is used to display the real-time image; The control unit is used to execute the auxiliary positioning method of the eccentric wheel on the nozzle plate as described in any one of claims 1 to 6.

8. An auxiliary positioning device for an eccentric wheel on a nozzle plate, characterized in that: The nozzle plate includes a plurality of positioning holes and an eccentric wheel arranged in the positioning holes, and the device includes: An image receiving module, used for receiving a real-time image of the printhead plate; A coordinate system generating module, used for generating a workpiece coordinate system on the real-time image; A first reference line generating module, used for acquiring a reference eccentric wheel according to the real-time image, and generating a first reference line in the real-time image which is parallel to the first coordinate axis of the workpiece coordinate system and tangent to the reference eccentric wheel; A second reference line generating module, used for generating a plurality of second reference lines in the real-time image which are parallel to the first reference line and are separated by a first distance value; The display module is used to display the real-time image, the workpiece coordinate system, the first reference line and the second reference line in real time.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the auxiliary positioning method of the eccentric wheel on the nozzle plate as described in any one of claims 1 to 6 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the auxiliary positioning method of the eccentric wheel on the nozzle plate according to any one of claims 1 to 6.

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