CN210415916U - Ink jet head nozzle abnormality detection device and ink jet printer - Google Patents
Ink jet head nozzle abnormality detection device and ink jet printer Download PDFInfo
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- CN210415916U CN210415916U CN201920935725.8U CN201920935725U CN210415916U CN 210415916 U CN210415916 U CN 210415916U CN 201920935725 U CN201920935725 U CN 201920935725U CN 210415916 U CN210415916 U CN 210415916U
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Abstract
The utility model discloses an ink gun nozzle abnormity detection device and ink jet printer, wherein ink gun nozzle abnormity detection device is used for detecting whether the nozzle of ink gun unit is unusual before the ink jet printer, the device includes: the ink jet printing controller controls the ink gun unit to move to the detection position of the sensor array and controls the nozzle on the ink gun unit to jet ink to the sensor array, the signal collector is respectively connected with the ink jet printing controller and the sensor array, and when the nozzle on the ink gun unit jets ink to the sensor array, the ink jet printing controller controls the signal collector to receive the pressure signal sensed by the sensor array. The device has the advantages of simple structure, convenient operation and accurate detection.
Description
Technical Field
The utility model relates to an inkjet printing technical field especially relates to an ink gun nozzle abnormity detection device and inkjet printer.
Background
The inkjet printing technology is a technology for obtaining images or characters by jetting ink droplets to a printing medium through nozzles on a nozzle, but after an inkjet printer inkjet head works for a long time, the state of the nozzles of the inkjet head is abnormal due to ink path pollution, ink precipitation, dust, water vapor and the like, and if the nozzles of the inkjet head are still used after abnormality occurs, the problems of pull lines, blanks and the like of printed images can be caused, so that the quality of products is seriously affected, and therefore, the development of a detection device for detecting whether the nozzles of the inkjet head are abnormal becomes necessary.
A traditional method for detecting the state of the nozzles of an ink gun in the industrial ink-jet printing industry is to design a state diagram which can clearly distinguish each nozzle of each ink gun, then an ink-jet printing controller is adopted to control the ink gun to print the state diagram by ink-jet, whether the nozzle in the ink gun is abnormal or not and the position of the abnormal nozzle in the ink gun are determined by observing the printed state diagram, if the abnormal nozzle exists, the position of the abnormal nozzle in the ink gun is manually input into control software for storage and recording.
The detection device adopted in the industry of industrial inkjet printing in the prior art is a laser sensor, and the detection device is disclosed as follows: CN207901879U and CN207901880U both disclose that a correlation sensor or a laser radar scanning sensor is mounted on the ink jet track of the nozzle, the correlation sensor can only detect one nozzle by one nozzle, the detection speed is slow, the efficiency is low, and the laser beams emitted by the two detection sensors are required to pass through the ink jet track of the nozzle, so that the installation requirement of the detection sensors is high, the detection difficulty is high, and the error rate is large.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an ink gun nozzle abnormity detection device and ink jet printer for solve the problem that current detection device detection efficiency is low, the error is big.
In one aspect, an embodiment of the present invention provides an inkjet head nozzle abnormality detection apparatus for detecting whether a nozzle of an inkjet head unit is abnormal in ink discharge before inkjet printing, which is characterized in that the apparatus includes: the ink jet printing controller controls the ink gun unit to move to the detection position of the sensor array and controls the nozzle on the ink gun unit to jet ink to the sensor array, the signal collector is respectively connected with the ink jet printing controller and the sensor array, and when the nozzle on the ink gun unit jets ink to the sensor array, the ink jet printing controller controls the signal collector to receive the pressure signal sensed by the sensor array.
Preferably, the sensor array is formed by a plurality of diffused silicon pressure strain elements arranged in a matrix.
Preferably, the effective detection area of the sensor array is at least larger than the area occupied by all the nozzles of the inkjet head, and the detection of whether the ink discharge of the nozzles is abnormal or not can be simultaneously performed for a plurality of nozzles when the sensor array faces the inkjet head.
Preferably, the signal collector includes: the device comprises an operational amplification unit, a multi-channel control unit, an A/D conversion unit and an FPGA processing unit; the operation amplification unit is connected with the multi-channel control unit, the multi-channel control unit is respectively connected with the A/D conversion unit and the FPGA processing unit, and the FPGA processing unit is connected with the ink-jet printing controller.
Preferably, the operational amplification unit includes: the circuit comprises an amplifier, a first resistor, a second resistor, a third resistor and a first capacitor; a first end of the second resistor is connected with the sensor array, and a second end of the second resistor is connected with a first end of the amplifier; the first end of the first resistor is connected with the second end of the amplifier, and the second end of the first resistor is grounded; a first end of the third resistor is connected with a second end of the amplifier, and a second end of the third resistor is connected with a first end of the first capacitor; the second end of the first capacitor is grounded, the third end of the amplifier is connected with a power supply, and the fourth end of the amplifier is connected with the A/D conversion unit.
In another aspect, an embodiment of the present invention provides an inkjet printer, where the inkjet head unit includes at least one inkjet head, each inkjet head includes a plurality of nozzles, the inkjet printer further includes: and a nozzle abnormality detection device for detecting whether or not the nozzle of the inkjet head is abnormal, wherein the nozzle abnormality detection device is the inkjet head nozzle abnormality detection device.
Preferably, the inkjet printer further includes a driving device, a printing platform, and a carriage spraying device located above the printing platform and driving the inkjet head unit to move, and the driving device is connected to the carriage spraying device and is configured to drive the carriage spraying device to move above the sensor array located on the printing platform.
Preferably, the vehicle-spraying device comprises a flash spraying groove, and the flash spraying groove is positioned in the vehicle-spraying device and is used for receiving ink droplets sprayed when the ink-jet head unit performs flash spraying; the sensor array is positioned in the flash tank and used for detecting whether ink is discharged from a nozzle in the ink gun unit normally when the ink gun unit flashes in the flash tank.
Preferably, the sensor array comprises: the base plate and be located a plurality of pressure strain element who is the matrix arrangement on the base plate, be provided with on the base plate with the base plate is installed the installation department in the groove is spouted to the flash.
Preferably, the inkjet printer is a UV flatbed printer.
To sum up, the embodiment of the present invention provides an inkjet head nozzle abnormality detection apparatus and an inkjet printer, wherein the inkjet head nozzle abnormality detection apparatus detects whether the nozzles eject ink droplets by using a sensor array, the sensor array can detect a plurality of nozzles simultaneously, and does not need to predict the ink-jet trajectory of the nozzles, and the detection speed is fast, flexible and accurate; meanwhile, the signal collector is adopted to amplify and analyze the detected signal and can transmit the amplified signal to the ink-jet printer in real time for storage and recording, so that the data of the abnormal nozzle can be conveniently processed during normal printing, the quality of the printed image is ensured not to be reduced, the printing requirement can be met, the dynamic real-time monitoring and recording do not need manual participation, the intellectualization is high, the whole ink-jet printing process is simplified, and the printing speed is improved; the ink gun nozzle abnormity detection device only comprises an ink jet printing controller, a sensor array and a signal collector, and the device has the advantages of simple structure, convenience in operation and accuracy in detection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an inkjet head unit of an inkjet printer according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an inkjet printer according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an inkjet head nozzle abnormality detection device according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a signal collector of an inkjet head nozzle abnormality detection device according to an embodiment of the present invention.
Fig. 5 is a schematic view of an operational amplifier unit of the inkjet head nozzle abnormality detection device according to the embodiment of the present invention.
Detailed Description
The features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the utility model provides an ink jet printer, ink jet printer includes the ink gun unit and is used for detecting whether unusual ink gun nozzle of the nozzle of ink gun is unusual detection device, the ink gun unit includes at least one ink gun, and every ink gun includes at least a plurality of nozzles.
Referring to fig. 1, in the present embodiment, the inkjet head unit includes 4 inkjet heads, respectively, a first inkjet head C for ejecting cyan ink, a second inkjet head M for ejecting magenta ink, a third inkjet head Y for ejecting yellow ink, and a fourth inkjet head K for ejecting black ink, the 4 inkjet heads are arranged in parallel, each inkjet head includes two rows of nozzles, and the two rows of nozzles are arranged in a staggered manner. In another embodiment, the inkjet head unit includes 1 inkjet head including 4 rows of nozzles, respectively, a first row of nozzles J1 for ejecting cyan ink, a second row of nozzles J2 for ejecting magenta ink, a third row of nozzles J3 for ejecting yellow ink, and a fourth row of nozzles J4 for ejecting black ink. The inkjet head unit may eject not only the 4-medium primary color ink for inkjet printing, but also white ink, and the specific structure of the inkjet head and the color of the ejected ink are not specifically limited herein.
Preferably, referring to fig. 2, the inkjet printer 10 further includes: the driving device is connected with the inkjet car device 200 and is used for driving the inkjet car device 200 to move above the sensor array on the printing platform 100, so that the nozzles on the inkjet head can jet ink on the sensor array.
Preferably, the driving means includes: a first driving unit, a guide rail 301, a second driving unit 302 and a screw rod 303; the guide rail 301 is positioned above the printing platform 100 and crosses the printing platform 100, so that the spraying trolley device 200 can flexibly move back and forth on the printing platform 100, and the first driving unit drives the spraying trolley device 200 to move along the guide rail 301 above the printing platform 100; the lead screw 303 is located on the side line of the printing platform 100 and located on the same horizontal plane as the printing platform 100, the lead screw 303 is perpendicular to the guide rail 301, the second driving unit 302 drives the car spraying device 200 to move on the lead screw 303 in the direction perpendicular to the guide rail 301, wherein two of the lead screws 303 are respectively located on two sides of the printing platform 100 and used for supporting and guiding the car spraying device 200 to move in the direction perpendicular to the guide rail 301.
Preferably, with continued reference to fig. 2, the inkjet printer 10 is a UV flatbed printer, which does not limit the shape of the sensor array, and any shape of sensor can be placed on the printing platform 100 to detect whether the nozzle is abnormal. The ink-jet printer may also be a printer, and the sensor array for detecting the ink-jet head of the printer is narrow, because the platform for placing the sensor array is limited, and the size of the sensor array is required.
Preferably, the inkjet head unit 200 includes a flash slot (not labeled) located in the inkjet head unit 200 for receiving ink droplets ejected by the inkjet head unit during flash; the sensor array is positioned in the flash tank and used for detecting whether a nozzle in the ink gun unit is normal or not when the ink gun unit flashes in the flash tank. Therefore, the printing platform can be prevented from being polluted by not detecting on the printing platform, meanwhile, the ink gun unit can be detected in real time in the printing process, the printing of normal images is not influenced, and when the abnormal nozzle is detected, the abnormal nozzle can be compensated in time, so that the reprinting is avoided.
Referring to fig. 3, an embodiment of the present invention further provides an inkjet head nozzle abnormality detection apparatus, including: the inkjet printing system comprises an inkjet printing controller 400, a sensor array 700 and a signal collector 600, wherein the inkjet printing controller 400 is used for controlling the inkjet head unit 500 to move to a detection position of the sensor array 700 and controlling the nozzles on the inkjet head unit 500 to jet ink to the sensor array 700, and the signal collector 600 is connected with the sensor array 700 and used for controlling the signal collector 600 to receive a pressure signal sensed by the sensor array 700 when the nozzles on the inkjet head unit 500 jet ink to the sensor array 700.
Preferably, the sensor array 700 is formed by arranging a plurality of diffused silicon pressure strain elements in a matrix, so as to ensure that a plurality of nozzles can be detected simultaneously, save detection time, and improve printing efficiency, wherein the specific number of the diffused silicon pressure strain elements is set according to the number of nozzles required to be detected at one time, and in this embodiment, one diffused silicon pressure strain element is used to detect ink discharged from one nozzle. When the diffused silicon pressure sensor is diffused on the sensitive part of a silicon chip, a silicon diaphragm generates strain, so that the resistor strip deforms and outputs a linearized voltage which is in direct proportion to the pressure. The sensor has the characteristics of small volume, high precision, good repeatability, strong overvoltage capacity, long service life, small hysteresis and good dynamic response. Furthermore, the effective detection area of the sensor array 700 is at least larger than the area occupied by all the nozzles of an inkjet head, and when the sensor array is just opposite to the inkjet head, the detection of whether the ink discharge of the nozzles is abnormal or not can be simultaneously carried out on a plurality of nozzles, so that the detection of one inkjet head can be realized at least once for the inkjet printer with a plurality of inkjet heads, and the detection is regular, the data acquisition of the signal acquisition unit is accurate, and the confusion is not easy to occur.
Further, the sensor array 700 further includes: the base plate and be located a plurality of pressure strain element who is the matrix arrangement on the base plate, be provided with on the base plate with the base plate is installed the installation department in the groove is spouted in the sudden strain of a muscle, in this embodiment, the installation department is the mounting hole, through the mounting hole will the base plate is fixed in the groove is spouted in the sudden strain of a muscle, has made things convenient for like this sensor array's installation.
Referring to fig. 4, the signal collector 600 includes: the device comprises an operational amplification unit 610, a multi-channel control unit 620, an A/D conversion unit 630 and an FPGA processing unit 640; the operational amplification unit 610 and the multi-channel control unit 620, the multi-channel control unit 620 is respectively connected with the a/D conversion unit 630 and the FPGA processing unit 640, and the FPGA processing unit 640 is connected with the inkjet printing controller 400. The operational amplification unit 610 is connected to the sensor array, and is configured to amplify the pressure signal collected from the sensor array and output the amplified pressure signal to the multi-channel control unit 620, the multi-channel control unit 620 selectively outputs the amplified pressure signal to the a/D conversion unit 630 according to a channel, the a/D conversion unit 630 performs analog-to-digital conversion on the amplified pressure signal and inputs the amplified pressure signal to the FPGA processing unit 640, the FPGA processing unit 640 performs operational processing on the digital signal received from the a/D conversion unit 630 to determine whether a nozzle of the inkjet head unit is abnormal, and simultaneously transmits processed abnormal nozzle data to the inkjet printing controller 400, and the inkjet printing controller 400 performs corresponding compensation operation according to the abnormal nozzle information. Further, the inkjet head nozzle abnormality detection device may further include: display 650, display 650 with FPGA processing unit 640 is connected, be used for with FPGA processing unit 640 operation's result data show and save, in this embodiment, display 650 with FPGA processing unit 640 connects through USB interface connection data line, can show in data output host computer and save or can directly save, when carrying out the inkjet printing with result data introduction print control software, print control software discerns behind the unusual jet-propelled hole position data, calculate the compensation to unusual print data and finally guarantee that the quality of printing the image meets the requirements. The display 650 and the FPGA processing unit 640 may also adopt a wireless communication protocol module, and transmit result data to an upper computer through a network related to the network, and the display unit may be any device capable of displaying, such as a PC, a TV, and the like.
Referring to fig. 5, the operational amplifier unit 610 includes: an amplifier U1, a first resistor R1, a first resistor R2, a third resistor Rf and a first capacitor C2; a first end of the first resistor R2 is connected to the sensor array 700, and a second end of the first resistor R2 is connected to a first end of the amplifier U1; a first end of the first resistor R1 is connected with a second end of the amplifier U1, and a second end of the first resistor R1 is grounded; a first terminal of the third resistor Rf is connected to the second terminal of the amplifier U1, and a second terminal of the third resistor Rf is connected to the first terminal of the first capacitor C2; the second terminal of the first capacitor C2 is grounded, the third terminal of the amplifier U1 is connected to a power supply, and the fourth terminal of the amplifier U1 is connected to the a/D conversion unit 630. In the embodiment, the power supply outputs a voltage value of 5V, so that the safety of an operator is not affected by overlarge voltage in the whole circuit, the consumption of electric quantity is saved, and the problem that the machine is easy to damage due to overlarge heat productivity is solved.
In summary, the specific detection principle of the inkjet head nozzle abnormality detection device is as follows: the sensor array 700 is placed on the ink-jet printer platform, so that the surface of the ink-jet head is parallel to the plane of the sensor array 700, and all the ink-jet heads can be ejected into the effective detection area of the sensor array 700, thereby ensuring that the sensor array 700 can accurately detect the ink ejected by each nozzle and judge the position of the corresponding nozzle, and avoiding the occurrence of errors caused by inaccurate detection due to uneven placement of the sensor array 700; then the second driving unit 302 starts to drive the screw rod 303 to rotate so as to drive the car spraying device 200 to move in the direction vertical to the guide rail 301 until the car spraying device is flush with the sensor array 700, and then the second driving unit stops, and then the first driving unit starts to drive the car spraying device 200 to move on the guide rail 301 until the car spraying device reaches the effective detection area of the sensor array 700; then the inkjet printing controller 400 controls the reference nozzles in the inkjet head unit to eject ink for positioning the position of the inkjet head and the positions between the inkjet nozzles, so that the post-stage FPGA processing unit 640 can position the position of each nozzle according to the parameters of the inkjet head and the acquired position of the reference nozzle, so as to determine the position of an abnormal nozzle according to the acquired pressure signal, in this embodiment, the reference nozzles include the first nozzle and the corresponding second nozzle of the inkjet head, and also include the first nozzle in each row of nozzles; after the positioning of the ink jet head unit is finished, the ink jet controller controls all nozzles to continuously jet ink for 30 seconds or more, meanwhile, the signal collector starts to collect pressure signals generated by ink drop printing on the sensor array 700, processes the signals, inputs and judges the signals, and when the corresponding nozzles detect no pressure signals, the nozzles are abnormal; when the corresponding nozzle detects a pressure signal, if the effective area of the ink drop corresponding to the pressure signal and the effective area of the ink drop sprayed by the normal nozzle are within a certain error range, the nozzle is normal, otherwise, the nozzle is abnormal, and the detection result is output and stored after the judgment is finished.
To sum up, the embodiment of the present invention provides an inkjet head nozzle abnormality detection apparatus and an inkjet printer, wherein the inkjet head nozzle abnormality detection apparatus detects whether the nozzles eject ink droplets by using a sensor array, the sensor array can detect a plurality of nozzles simultaneously, and does not need to predict the ink-jet trajectory of the nozzles, and the detection speed is fast, flexible and accurate; meanwhile, the signal collector is adopted to amplify and analyze the detected signal and can transmit the amplified signal to the ink-jet printer in real time for storage and recording, so that the data of the abnormal nozzle can be conveniently processed during normal printing, the quality of the printed image is ensured not to be reduced, the printing requirement can be met, the dynamic real-time monitoring and recording do not need manual participation, the intellectualization is high, the whole ink-jet printing process is simplified, and the printing speed is improved; the ink gun nozzle abnormity detection device only comprises an ink jet printing controller, a sensor array and a signal collector, and the device has the advantages of simple structure, convenience in operation and accuracy in detection.
The inkjet head nozzle abnormality detection device and the inkjet printer provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples herein, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, to the general technical personnel in this field, according to the utility model discloses an idea, all can have the change part on concrete implementation and application scope, to sum up, this description content only is the utility model discloses an embodiment, does not consequently restrict the utility model discloses a patent scope, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing did, or directly or indirectly use in other relevant technical fields, all the same reason is included in the utility model discloses a patent protection scope. And should not be construed as limiting the invention.
Claims (10)
1. An inkjet head nozzle abnormality detection device for detecting whether or not an inkjet head unit nozzle discharge is abnormal before inkjet printing, the device comprising: the ink jet printing controller controls the ink gun unit to move to the detection position of the sensor array and controls the nozzle on the ink gun unit to jet ink to the sensor array, the signal collector is respectively connected with the ink jet printing controller and the sensor array, and when the nozzle on the ink gun unit jets ink to the sensor array, the ink jet printing controller controls the signal collector to receive the pressure signal sensed by the sensor array.
2. An ink jet head nozzle abnormality detection apparatus according to claim 1, wherein said sensor array is formed by a plurality of diffused silicon pressure strain elements arranged in a matrix.
3. An ink jet head nozzle abnormality detection apparatus according to claim 2, wherein an effective detection area of said sensor array is at least larger than an area occupied by all nozzles of said ink jet head, and detection of whether or not the ink discharge from the nozzles is abnormal can be simultaneously performed for a plurality of nozzles when said sensor array faces said ink jet head.
4. An inkjet head nozzle abnormality detection device according to any one of claims 1 to 3, wherein the signal collector includes: the device comprises an operational amplification unit, a multi-channel control unit, an A/D conversion unit and an FPGA processing unit; the operation amplification unit is connected with the multi-channel control unit, the multi-channel control unit is respectively connected with the A/D conversion unit and the FPGA processing unit, and the FPGA processing unit is connected with the ink-jet printing controller.
5. An ink jet head nozzle abnormality detection device according to claim 4, wherein said operational amplification unit includes: the circuit comprises an amplifier, a first resistor, a second resistor, a third resistor and a first capacitor; a first end of the second resistor is connected with the sensor array, and a second end of the second resistor is connected with a first end of the amplifier; the first end of the first resistor is connected with the second end of the amplifier, and the second end of the first resistor is grounded; a first end of the third resistor is connected with a second end of the amplifier, and a second end of the third resistor is connected with a first end of the first capacitor; the second end of the first capacitor is grounded, the third end of the amplifier is connected with a power supply, and the fourth end of the amplifier is connected with the A/D conversion unit.
6. An inkjet printer comprising an inkjet head unit including at least one inkjet head, each inkjet head including a plurality of nozzles, characterized in that the inkjet printer further comprises: a nozzle abnormality detecting device for detecting whether or not a nozzle of the ink jet head is abnormal, the nozzle abnormality detecting device being an ink jet head nozzle abnormality detecting device according to any one of claims 1 to 5.
7. The inkjet printer according to claim 6, further comprising a driving device, a printing platform, and a carriage device located above the printing platform for driving the inkjet head unit to move, wherein the driving device is connected to the carriage device for driving the carriage device to move above the sensor array located on the printing platform.
8. The inkjet printer according to claim 7, wherein the carriage unit includes a flash tank, the flash tank being located in the carriage unit and adapted to receive ink droplets ejected by the inkjet head unit during the flash; the sensor array is positioned in the flash tank and used for detecting whether ink is discharged from a nozzle in the ink gun unit normally when the ink gun unit flashes in the flash tank.
9. The inkjet printer of claim 8, wherein the sensor array comprises: the base plate and be located a plurality of pressure strain element who is the matrix arrangement on the base plate, be provided with on the base plate with the base plate is installed the installation department in the groove is spouted to the flash.
10. Inkjet printer according to any one of claims 6 to 9, characterized in that the inkjet printer is a UV flatbed printer.
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| CN112265260A (en) * | 2020-09-28 | 2021-01-26 | 西安交通大学 | Integrated driving and controlling structure for array printing nozzle |
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| CN112265260A (en) * | 2020-09-28 | 2021-01-26 | 西安交通大学 | Integrated driving and controlling structure for array printing nozzle |
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