A system for determining the state of an ink ejection orifice and a printer

Abstract

The application discloses a kind of state determination systems of ink-jet hole and printer, it is related to printer technical field, the system includes information determination equipment, processing equipment and control equipment, processing equipment includes first filter module, second filter module and first amplification module;Information determination equipment is used to determine the initial ink drop information of ink-jet equipment;First filter module is used to determine first ink drop information based on initial ink drop information and first filter rule;Second filter module is used to determine second ink drop information based on initial ink drop information and second filter rule;First amplification module is used to determine target ink drop information based on first ink drop information, second ink drop information and first integration rule;Control equipment is used to determine the state of each ink-jet hole based on target ink drop information.The application uses processing equipment initial ink drop information to filter and compare amplification, control equipment determines the state of each ink-jet hole based on processed ink drop information, improve the accuracy of ink-jet hole state detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printers, and particularly relates to a system for determining the state of ink ejection holes and a printer. BACKGROUND

[0002] With the development of printers, the improvement of the living standards of residents and the office levels of enterprises, the application of printers is becoming more and more common, and the printers have been completely integrated into people's daily life. Therefore, the printing effect of the printer is one of the key issues that people are concerned about.

[0003] The printing effect of the printer is closely related to the quality of the printing components and printing consumables, etc. For example, the printing effect of an inkjet printer is related to the performance of the ink ejection head. If the ink ejection holes of the ink ejection head are blocked or have other faults, the printing quality of the printer will be reduced. At present, the method for detecting the blockage fault of the inkjet printer is to set a detection tube at the position where the ink droplets pass through, and to determine whether the ink ejection holes are blocked based on the detection result of the detection tube. However, the ink droplet signal detected by the detection tube is relatively weak, and the change rate and accuracy of the signal are limited, which will affect the detection result of the ink ejection holes. SUMMARY

[0004] The present application provides a system for determining the state of ink ejection holes and a printer, which aims to improve the accuracy of ink ejection hole state detection and improve the printing quality of the printer.

[0005] According to an aspect of the present application, a system for determining the state of ink ejection holes is provided, which comprises an information determination device, a processing device and a control device, wherein the processing device is connected to the information determination device and the control device respectively, and the processing device comprises a first filtering module, a second filtering module and a first amplification module.

[0006] The information determination device is used to determine initial ink droplet information of an ink ejection device, wherein the ink ejection device comprises i ink ejection holes, i is an integer, and i≥1.

[0007] The first filtering module is used to determine first ink droplet information based on the initial ink droplet information and a first filtering rule.

[0008] The second filtering module is used to determine second ink droplet information based on the initial ink droplet information and a second filtering rule.

[0009] The first amplification module is used to determine target ink droplet information based on the first ink droplet information, the second ink droplet information and a first integration rule.

[0010] The control device is used to determine the state of each ink ejection hole based on the target ink droplet information.

[0011] Optionally, the control device is specifically configured to: determine the actual ink drop signal of each ink ejection hole based on the target ink drop information; and determine the state of each ink ejection hole based on the actual ink drop signal of each ink ejection hole and the reference ink drop signal of each ink ejection hole.

[0012] Optionally, the control device is specifically configured to: determine whether the actual ink drop signal of the ink ejection hole and the reference ink drop signal of the ink ejection hole are consistent; if the actual ink drop signal of the ink ejection hole and the reference ink drop signal of the ink ejection hole are consistent, determine that the state of the ink ejection hole is normal; and if the actual ink drop signal of the ink ejection hole and the reference ink drop signal of the ink ejection hole are inconsistent, determine that the state of the ink ejection hole is abnormal.

[0013] Optionally, the control device is further configured to determine the faulty ink ejection hole based on the identification information of the actual ink drop signal of the ink ejection hole after determining that the state of the ink ejection hole is abnormal.

[0014] Optionally, the information determination device comprises a signal emission module and a signal receiving module; the signal emission module is configured to emit a detection signal, wherein the propagation trajectory of the detection signal intersects with the reference ink ejection trajectory of the ink ejection device; and the signal receiving module is configured to receive the detection signal passing through the reference ink ejection trajectory, and determine the initial ink drop information based on the received detection signal.

[0015] Optionally, the detection signal changes when the actual ink ejection trajectory generated by the ink ejection device coincides with the reference ink ejection trajectory.

[0016] Optionally, the system further comprises an information feedback device, wherein the information feedback device is connected to the information determination device, and the information feedback device comprises a third filtering module and a second amplification module; the third filtering module is configured to determine third ink drop information based on the initial ink drop information and a third filtering rule; and the second amplification module is configured to determine signal adjustment information based on the third ink drop information, the detection signal and a second integration rule, and determine an adjustment instruction based on the signal adjustment information, wherein the adjustment instruction is used to adjust the intensity of the detection signal.

[0017] Optionally, the adjustment instruction comprises a first adjustment instruction and a second adjustment instruction; when the signal adjustment information meets a first adjustment requirement, the adjustment instruction is determined to be the first adjustment instruction, wherein the first adjustment requirement is that the current value of the signal adjustment information is greater than or equal to a first current threshold value, and the first adjustment instruction is to reduce the intensity of the detection signal; and when the signal adjustment instruction meets a second adjustment requirement, the adjustment instruction is determined to be the second adjustment instruction, wherein the second adjustment requirement is that the current value of the signal adjustment information is less than or equal to a second current threshold value, and the second adjustment instruction is to increase the intensity of the detection signal; and wherein the first current threshold value is greater than the second current threshold value.

[0018] Optionally, the first filter module comprises a first resistor and a first capacitor, the second filter module comprises a second resistor and a second capacitor, and the first amplification module comprises a first operational amplifier, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor; wherein a first end of the first capacitor is grounded, a second end of the first capacitor is connected to a second end of the first resistor and a first end of the fourth resistor, a first end of the first resistor is connected to the information determining device, a second end of the fourth resistor is connected to a third end of the first operational amplifier and a first end of the sixth resistor, a second end of the sixth resistor is connected to a fourth end of the first operational amplifier and the control device, a first end of the second capacitor is grounded, a second end of the second capacitor is connected to a second end of the second resistor and a first end of the fifth resistor, a first end of the second resistor is connected to the information determining device, a second end of the fifth resistor is connected to a first end of the first operational amplifier and a first end of the seventh resistor, a second end of the seventh resistor is grounded, a second end of the first operational amplifier is grounded, and a fifth end of the first operational amplifier is connected to the power supply signal.

[0019] Optionally, the third filter module comprises a third resistor and a third capacitor, and the second amplification module comprises a second operational amplifier, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor; wherein a first end of the third capacitor is grounded, a second end of the third capacitor is connected to a second end of the third resistor and a first end of the eighth resistor, a first end of the third resistor is connected to the information determining device, a second end of the eighth resistor is connected to a third end of the second operational amplifier and a first end of the tenth resistor, a second end of the tenth resistor is connected to a fourth end of the second operational amplifier, a second end of the second operational amplifier is grounded, a first end of the second operational amplifier is connected to a first end of the ninth resistor and a first end of the eleventh resistor, a second end of the eleventh resistor is grounded, a second end of the ninth resistor is connected to the information determining device, a fifth end of the second operational amplifier is connected to the power supply signal, and the fourth end of the second operational amplifier is connected to the information determining device based on the adjusting unit.

[0020] According to another aspect of the present application, there is provided a printer comprising the system for determining the state of the inkjet hole according to any of the embodiments of the present application.

[0021] The inkjet hole state determination system of the application comprises an information determination device, a processing device and a control device, the processing device comprises a first filtering module, a second filtering module and a first amplification module; the information determination device is used to determine initial ink drop information of an inkjet device, wherein the inkjet device comprises i inkjet holes, i is an integer, i≥1; the first filtering module is used to determine first ink drop information based on the initial ink drop information and a first filtering rule; the second filtering module is used to determine second ink drop information based on the initial ink drop information and a second filtering rule; the first amplification module is used to determine target ink drop information based on the first ink drop information, the second ink drop information and a first integration rule; and the control device is used to determine the state of each inkjet hole based on the target ink drop information. The ink drop information collected by the information determination device is filtered and compared and amplified by the processing device, and the control device determines the state of each inkjet hole according to the processing result of the processing device, thereby improving the accuracy of inkjet hole state detection and improving the printing quality of the printer. The problem that the detection result of the detection tube is relatively weak, the signal change rate and accuracy are limited, and the detection result of the inkjet hole is affected when the existing detection tube is used to determine whether the inkjet hole is blocked is solved.

[0022] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the application, nor is it used to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 is a structural schematic diagram of an inkjet hole state determination system provided by the first embodiment of the application;

[0025] Figure 2 is a structural schematic diagram of an inkjet hole state determination system provided by the second embodiment of the application;

[0026] Figure 3 is a structural schematic diagram of another inkjet hole state determination system provided by the second embodiment of the application;

[0027] Figure 4 is a schematic diagram of initial ink drop information provided by the second embodiment of the application;

[0028] Figure 5 is a schematic diagram of first ink drop information provided by the second embodiment of the application;

[0029] Figure 6 is a schematic diagram of second ink drop information provided by the second embodiment of the present application;

[0030] Figure 7 is a schematic diagram of target ink drop information provided by the second embodiment of the present application;

[0031] Figure 8 is a schematic diagram of the relationship between the light intensity and the output current of the signal receiving module provided by the second embodiment of the present application.

[0032] Reference signs:

[0033] 10 - state determination system of ink ejection hole, 101 - information determination device, 1011 - signal transmitting module, 1012 - signal receiving module, 102 - processing device, 1021 - first filtering module, 1022 - second filtering module, 1023 - first amplifying module, 103 - control device, 104 - information feedback device, 1041 - third filtering module, 1042 - second amplifying module. DETAILED DESCRIPTION

[0034] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without making creative efforts should belong to the scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0036] Embodiment One

[0037] Figure 1 is a structural schematic diagram of a state determination system of an ink ejection hole provided by the first embodiment of the present application. The present embodiment can be applied to detect whether the ink ejection hole of a printer is blocked or the like. As shown inFigure 1 As shown, the inkjet hole state determination system 10 comprises an information determination device 101, a processing device 102 and a control device 103, the processing device 102 is connected to the information determination device 101 and the control device 103 respectively, and the processing device 102 comprises a first filtering module 1021, a second filtering module 1022 and a first amplification module 1023; the information determination device 101 is used to determine initial ink drop information of an inkjet device, wherein the inkjet device comprises i inkjet holes, i is an integer, i≥1; the first filtering module 1021 is used to determine first ink drop information based on the initial ink drop information and a first filtering rule; the second filtering module 1022 is used to determine second ink drop information based on the initial ink drop information and a second filtering rule; the first amplification module 1023 is used to determine target ink drop information based on the first ink drop information, the second ink drop information and a first integration rule; and the control device 103 is used to determine the state of each inkjet hole based on the target ink drop information.

[0038] The information determination device can be understood as an instrument for determining inkjet information of an inkjet device, including infrared photocells, detection tubes, etc., and can determine ink drop information of at least one inkjet hole of the inkjet device; the processing device can be understood as an instrument for processing ink drop information, and the processing device comprises a first filtering module, a second filtering module and a first amplification module, the first filtering module and the second filtering module are two kinds of interference signal filtering circuits, the first filtering rule can be understood as a way for the first filtering module to filter interference signals, and the second filtering rule can be understood as a way for the second filtering module to filter interference signals, for example, the first filtering module can filter a first type of interference signal in the initial ink drop information, and the second filtering module can filter a second type of interference signal in the initial ink drop information, the range and frequency of the filtered interference signals are related to the specific parameters of the filtering circuit; the first amplification module can be understood as a circuit for comparing and amplifying the second ink drop information and the first ink drop information, the target ink drop information can be understood as ink drop signals of each to-be-detected inkjet hole of the inkjet device, and the control device can be understood as an instrument for determining whether each inkjet hole of the inkjet device has a fault based on the target ink drop information, the state of the inkjet hole can represent whether the inkjet hole has an inkjet fault, for example, when the state of the inkjet hole is normal, it is considered that the inkjet hole does not have an inkjet fault, and when the state of the inkjet hole is abnormal, it is considered that the inkjet hole has an inkjet fault, which is not limited in the embodiment.

[0039] Specifically, the inkjet device can be understood as an inkjet head, and one inkjet head comprises a plurality of inkjet holes, the number of inkjet holes referred to in the embodiment is related to the detection requirement, for example, it is assumed that the inkjet device comprises 126 inkjet holes, if all the inkjet holes need to be detected, the number of inkjet holes is 126, and if only the first 100 inkjet holes need to be detected, the number of inkjet holes is 100.

[0040] Exemplarily, the detection process of the inkjet device can be specifically divided into the following three steps: 1) after the inkjet device sprays ink, the initial ink drop information of each inkjet hole of the inkjet device is determined based on the information; 2) the initial ink drop information is filtered by using the first filtering module and the second filtering module respectively, and the two filtering results are compared and amplified to obtain the target ink drop information; and 3) the target ink drop information is analyzed by using the control device, and whether each inkjet hole of the inkjet device has an inkjet fault is determined based on the analysis result.

[0041] The advantage of such arrangement is that whether each to-be-detected inkjet hole of the inkjet device has an inkjet fault can be quickly, accurately and comprehensively determined, so that the technician can debug the inkjet device based on the detection result, improve the printing effect of the printer, and improve the user's experience.

[0042] The state determination system of the inkjet hole of the embodiment includes an information determination device, a processing device and a control device, the processing device includes a first filtering module, a second filtering module and a first amplification module; the information determination device is used to determine the initial ink drop information of the inkjet device, wherein the inkjet device includes i inkjet holes, i is an integer, i≥1; the first filtering module is used to determine the first ink drop information based on the initial ink drop information and the first filtering rule; the second filtering module is used to determine the second ink drop information based on the initial ink drop information and the second filtering rule; the first amplification module is used to determine the target ink drop information based on the first ink drop information, the second ink drop information and the first integration rule; and the control device is used to determine the state of each inkjet hole based on the target ink drop information. The ink drop information collected by the information determination device is filtered and compared and amplified by using the processing device, and the state of each inkjet hole is determined by the control device according to the processing result of the processing device, which improves the accuracy of the inkjet hole state detection and improves the printing quality of the printer. The problem that the detection tube is arranged at the position where the ink drop passes, and whether the inkjet hole has a blockage fault is determined based on the detection result of the detection tube, the ink drop signal detected by the detection tube is relatively weak, the change rate and the accuracy of the signal are limited, and the detection result of the inkjet hole is affected.

[0043] Embodiment two

[0044] Figure 2 is a structural schematic diagram of a state determination system of an inkjet hole provided by the embodiment two of the present application, and the embodiment can be applicable to detecting whether the inkjet hole of the printer is blocked or the like. Figure 2As shown, the inkjet hole state determination system comprises an information determination device 101, a processing device 102, a control device 103 and an information feedback device 104, wherein the processing device 102 is connected to the information determination device 101 and the control device 103 respectively, and the information feedback device 104 is connected to the information determination device 101; the information determination device 101 comprises a signal transmitting module 1011 and a signal receiving module 1012; the processing device 102 comprises a first filtering module 1021, a second filtering module 1022 and a first amplifying module 1023; the information feedback device 104 comprises a third filtering module 1041 and a second amplifying module 1042; the signal transmitting module 1011 is used for transmitting a detection signal, wherein the propagation track of the detection signal intersects with a reference inkjet track of the inkjet device, and the detection signal changes when the actual inkjet track generated by the inkjet device coincides with the reference inkjet track; the signal receiving module 1012 is used for receiving the detection signal passing through the reference inkjet track, and determining initial ink drop information based on the received signal, wherein the inkjet device comprises i inkjet holes, i is an integer, i≥1; the first filtering module 1021 is used for determining first ink drop information based on the initial ink drop information and a first filtering rule; the second filtering module 1022 is used for determining second ink drop information based on the initial ink drop information and a second filtering rule; the first amplifying module 1023 is used for determining target ink drop information based on the first ink drop information, the second ink drop information and a first integration rule; the control device 103 is used for determining the state of each inkjet hole based on the target ink drop information; the third filtering module 1041 is used for determining third ink drop information based on the initial ink drop information and a third filtering rule; the second amplifying module 1042 is used for determining signal adjustment information based on the third ink drop information, the detection signal and a second integration rule, and determining an adjustment instruction based on the signal adjustment information, wherein the adjustment instruction is used for adjusting the intensity of the detection signal.

[0045] The information determining device can be understood as an instrument for determining the inkjet information of the inkjet device, and includes a signal emitting module and a signal receiving module. The signal emitting module can be an infrared emitting tube for emitting a detection signal. The signal receiving module can be an infrared receiving tube for receiving the detection signal emitted or transmitted by the ink droplet trajectory. The processing device can be understood as an instrument for processing the ink droplet information. The processing device includes a first filtering module, a second filtering module and a first amplifying module. The first filtering module and the second filtering module are two kinds of circuit for filtering the interference signal. The first filtering rule can be understood as a way for the first filtering module to filter the interference signal. The second filtering rule can be understood as a way for the second filtering module to filter the interference signal. For example, the first filtering module can filter the first type of interference signal in the initial ink droplet information. The second filtering module can filter the second type of interference signal in the initial ink droplet information. The range and frequency of the filtered interference signal are related to the specific parameters of the filtering circuit. The first amplifying module can be understood as a circuit for comparing and amplifying the second ink droplet information and the first ink droplet information. The target ink droplet information can be understood as the ink droplet signal of each to-be-detected inkjet hole of the inkjet device. The control device can be understood as an instrument for determining whether each inkjet hole of the inkjet device has a fault based on the target ink droplet information. The state of the inkjet hole can represent whether the inkjet hole has an inkjet fault. For example, when the state of the inkjet hole is normal, it is considered that the inkjet hole does not have an inkjet fault. When the state of the inkjet hole is abnormal, it is considered that the inkjet hole has an inkjet fault. The information feedback device can be used to adjust the intensity of the emission signal of the information determining device. The present embodiment does not make any limitation in this regard.

[0046] The reference inkjet trajectory can be understood as the inkjet trajectory of the inkjet device when each inkjet hole of the inkjet device is normal. When the inkjet hole is normal, the actual inkjet trajectory of the inkjet device is equal to the reference inkjet trajectory. The actual inkjet trajectory of the inkjet device will intersect with the detection light, and the detection signal will change. If the inkjet hole is blocked and has no inkjet or the inkjet trajectory deviates due to half blockage, the detection signal received by the signal receiving device will not change or the change amplitude is small. Based on the detection signal received by the signal receiving device, whether the inkjet hole of the inkjet device is blocked can be determined.

[0047] The higher the signal intensity of the detection signal emitted by the signal emitting module, the greater the current value of the current output by the signal receiving module. However, both the excessive output current and the small output current are not beneficial to the fault detection of the inkjet hole. Therefore, it is necessary to adjust the intensity of the detection signal so that the current value output by the signal receiving module is within a proper range. The information feedback device in the present embodiment introduces a feedback mechanism to adjust the intensity of the detection signal so that the receiving tube of the signal receiving module is always in the amplification zone, provides a stable DC bias point for the receiving tube, and improves the detection accuracy of the ink droplet information.

[0048] Figure 3is a structural schematic view of another inkjet hole state determination system provided by embodiment two of the present application, from Figure 3 As can be seen from the above,

[0049] As can be seen from the above, Figure 3 As can be seen from the above, the first end of the first capacitor is grounded, the second end of the first capacitor is connected to the second end of the first resistor and the first end of the fourth resistor, the first end of the first resistor is connected to the information determination device, the second end of the fourth resistor is connected to the third end of the first operational amplifier and the first end of the sixth resistor, the second end of the sixth resistor is connected to the fourth end of the first operational amplifier and the control device, the first end of the second capacitor is grounded, the second end of the second capacitor is connected to the second end of the second resistor and the first end of the fifth resistor, the first end of the second resistor is connected to the information determination device, the second end of the fifth resistor is connected to the first end of the first operational amplifier and the first end of the seventh resistor, the second end of the seventh resistor is grounded, the second end of the first operational amplifier is grounded, and the fifth end of the first operational amplifier is connected to the power supply signal. The first end of the third capacitor is grounded, the second end of the third capacitor is connected to the second end of the third resistor and the first end of the eighth resistor, the first end of the third resistor is connected to the information determination device, the second end of the eighth resistor is connected to the third end of the second operational amplifier and the first end of the tenth resistor, the second end of the tenth resistor is connected to the fourth end of the second operational amplifier, the second end of the second operational amplifier is grounded, the first end of the second operational amplifier is connected to the first end of the ninth resistor and the first end of the eleventh resistor, the second end of the eleventh resistor is grounded, the second end of the ninth resistor is connected to the information determination device, the fifth end of the second operational amplifier is connected to the power supply signal, and the fourth end of the second operational amplifier is connected to the information determination device based on the adjustment unit.

[0050] The amplification factor of the amplification module is adjusted by the resistance value of the resistor of the amplification module, the adjustment unit can be understood as a component that adjusts the intensity of the detection signal based on the adjustment instruction, and the components of the adjustment unit are not limited in the present embodiment.

[0051] The time constants of the first filter module, the second filter module and the third filter module are different, and the purpose of the setting is to filter different types of interference signals. Specifically, the time constant of the first filter module is generally 1 / 10 of the signal period of the infrared receiving tube, the time constant of the second filter module is generally 100 times of the signal period of the infrared receiving tube, and the time constant of the third filter module is generally 10,000 times of the signal period of the infrared receiving tube. The specific time constant of each filter module is related to the performance of the printer, and the present embodiment does not limit this.

[0052] Specifically, the time constant of the first filter module is R1*C1, the time constant of the second filter module is R2*C2, and the time constant of the third filter module is R3*C3.

[0053] For example, assuming that the ejection speed of the ink droplet is 10 m / s and the spot diameter is 500 um, the time of the ink droplet passing through the infrared receiving tube is about 500 um / 10 m / s=50 us, that is, the signal period of the infrared receiving tube is 50 us. On this basis, the time constant of the first filter module is 5 us, the time constant of the second filter module is 500 us, and the time constant of the third filter module is 50 ms.

[0054] Further, the present embodiment can use the first amplification module to compare and amplify the output signals of the first filter module and the second filter module, and input the comparison and amplification results into the host (control device) so that the host signal judges whether the ink droplet is dropped or the ink ejection hole is blocked. The advantage of such a setting is that different filtering processes are performed on the original weak signal of the receiving tube, and the weak detection signal is converted into a detection signal with moderate signal amplitude by comparing and amplifying the two filtered signals, thereby improving the accuracy of the detection result. Secondly, such a setting mode can also ensure the distortion of the amplified signal.

[0055] Figure 4 is a schematic diagram of initial ink droplet information provided by the second embodiment of the present application, Figure 5 is a schematic diagram of first ink droplet information provided by the second embodiment of the present application, Figure 6 is a schematic diagram of second ink droplet information provided by the second embodiment of the present application, Figure 7 is a schematic diagram of target ink droplet information provided by the second embodiment of the present application. Among them, Figure 4 is initial ink droplet information detected by the signal receiving module of the information determination device, Figure 5 is initial ink droplet information processed by the first filter module, Figure 6 is initial ink droplet information processed by the second filter module, Figure 7 is Figure 5 is the comparison and amplification processing result of the ink droplet information in and the ink droplet information in Figure 6 .

[0056] from Figures 4-7 As can be seen, the initial ink droplet information detected by the signal receiving module contains multiple types of signals (current surges of different amplitudes in the figure), including interference signals and ink droplet information. For example, low-amplitude current surges represent interference signals, while high-amplitude current surges represent ink droplet information from the inkjet nozzle to be detected. The first filtering module can filter out interference information in the initial ink droplet information, and the second filtering module can filter out all burr information in the initial ink droplet information, retaining only the change shape of the original curve. The first amplification module can compare and amplify the two filtering results, aiming to amplify the changes caused by ink droplets so that the control device can determine whether there is an inkjet nozzle malfunction. In this embodiment, the advantage of using the second ink droplet information as a reference to amplify the current surges in the first ink droplet information is that it reduces the problem of misjudgment at peak or trough points when measuring ink droplet information with a fixed reference.

[0057] Optionally, the control device is specifically used to: determine the actual ink droplet signal of each inkjet orifice based on the target ink droplet information; and determine the state of each inkjet orifice based on the actual ink droplet signal of each inkjet orifice and the reference ink droplet signal of each inkjet orifice.

[0058] Specifically, the actual ink droplet signal of the inkjet nozzle can be understood as the ink droplet signal of the inkjet nozzle output by the first amplification module, and the reference ink droplet signal of the inkjet nozzle can be understood as the ideal signal of the inkjet nozzle.

[0059] For example, if the actual ink droplet signal of the inkjet nozzle is consistent with the reference ink droplet signal of the inkjet nozzle, the state of the inkjet nozzle is determined to be normal; if the actual ink droplet signal of the inkjet nozzle is inconsistent with the reference ink droplet signal of the inkjet nozzle, the state of the inkjet nozzle is determined to be abnormal.

[0060] Specifically, the control device is used to: determine whether the actual ink droplet signal of the inkjet nozzle is consistent with the reference ink droplet signal of the inkjet nozzle; if the actual ink droplet signal of the inkjet nozzle is consistent with the reference ink droplet signal of the inkjet nozzle, it proves that ink droplet information has been detected, the inkjet nozzle can spray ink normally, and the state of the inkjet nozzle is determined to be normal; if the actual ink droplet signal of the inkjet nozzle is inconsistent with the reference ink droplet signal of the inkjet nozzle, it proves that ink droplet information has not been detected, the inkjet nozzle may not be able to spray ink normally, and the state of the inkjet nozzle is determined to be abnormal.

[0061] Generally, the spacing between inkjet nozzles is equal. Therefore, the ink droplet signals from each nozzle should be equally spaced and of equal amplitude. The reference ink droplet signal consists of i equally spaced and equally amplitude pulse signals, and there is a one-to-one correspondence between the reference ink droplet signal and the actual ink droplet signal. If the current value of the actual ink droplet signal from any nozzle is 0, the nozzle is considered to be in an abnormal state. Combining the spacing of the ink droplet signal amplitudes can better determine whether there are missing ink droplet signals.

[0062] Optionally, the control device is also used to determine the faulty inkjet nozzle based on the identification information of the actual ink droplet signal of the inkjet nozzle after determining that the state of the inkjet nozzle is abnormal.

[0063] The identification information of the ink droplet signal can be understood as the attribute information of the ink droplet signal, used to distinguish each ink droplet, and there is a one-to-one correspondence between ink droplets and inkjet nozzles. Based on the identification information of the actual ink droplet signal, the inkjet nozzle corresponding to the actual ink droplet information can be determined.

[0064] The advantage of this setup is that it allows for quick location of faulty inkjet nozzles, enabling technicians to repair the printer.

[0065] Optionally, the adjustment instruction includes a first adjustment instruction and a second adjustment instruction; when the signal adjustment information meets the first adjustment requirement, the adjustment instruction is determined to be the first adjustment instruction, wherein the first adjustment requirement is that the current value of the signal adjustment information is greater than or equal to a first current threshold, and the first adjustment instruction is to reduce the intensity of the detection signal; when the signal adjustment instruction meets the second adjustment requirement, the adjustment instruction is determined to be the second adjustment instruction, wherein the second adjustment requirement is that the current value of the signal adjustment information is less than or equal to a second current threshold, and the second adjustment instruction is to increase the intensity of the detection signal; wherein the first current threshold is greater than the second current threshold.

[0066] The specific parameters of the first current threshold and the second current threshold are related to the parameters of each component in the inkjet nozzle state determination system, and this embodiment does not limit them.

[0067] The purpose of adjusting the intensity of the detection signal is to make the infrared receiver (signal receiving module) operate in the amplification region. Specifically, the amplification region of the receiver refers to the section where the receiver reacts significantly to changes in light intensity. Within this light intensity range, even small changes in light intensity will cause large changes in current, which can improve the sensitivity of signal detection and increase the detection accuracy of the inkjet nozzle.

[0068] For example, Figure 8 This is a schematic diagram illustrating the relationship between light intensity and the output current of a signal receiving module according to Embodiment 2 of the present invention. In the diagram, I1 represents a first current threshold, and I2 represents a second current threshold. Figure 8 As can be seen, the output current of the signal receiving module gradually increases with the increase of light intensity. In this embodiment, a range of variation within the amplification region is selected as the basis for adjusting the light intensity of the detection signal. When the current value of the signal adjustment information is greater than or equal to the first current threshold, the intensity of the detection signal is reduced; when the current value of the signal adjustment command is less than or equal to the second current threshold, the intensity of the detection signal is increased, so that the receiving tube operates in the amplification region and the sensitivity of the detection signal is guaranteed.

[0069] It is worth noting that the time constant (filtering depth) of the third filtering module is very high, and the output of the second amplification module is not affected by the signal of the receiving tube, which can ensure that the light intensity of the light-emitting tube does not change rapidly, and ensure that the bias point of the receiving tube is in a stable state during the detection process.

[0070] The inkjet nozzle state determination system of this embodiment includes an information determination device, a processing device, a control device, and an information feedback device. The processing device is connected to both the information determination device and the control device, and the information feedback device is connected to the information determination device. The information determination device includes a signal transmitting module and a signal receiving module. The processing device includes a first filtering module, a second filtering module, and a first amplification module. The information feedback device includes a third filtering module and a second amplification module. The signal transmitting module transmits a detection signal, wherein the propagation trajectory of the detection signal intersects with a reference inkjet trajectory of the inkjet device. The signal receiving module receives the detection signal passing through the reference inkjet trajectory and determines the initial ink droplet information based on the received signal. The inkjet device includes i inkjet nozzles. In this invention, i is an integer, i≥1; the first filtering module is used to determine the first ink droplet information based on the initial ink droplet information and the first filtering rule; the second filtering module is used to determine the second ink droplet information based on the initial ink droplet information and the second filtering rule; the first amplification module is used to determine the target ink droplet information based on the first ink droplet information, the second ink droplet information, and the first integration rule; the control device is used to determine the state of each inkjet nozzle based on the target ink droplet information; the third filtering module is used to determine the third ink droplet information based on the initial ink droplet information and the third filtering rule; the second amplification module is used to determine the signal adjustment information based on the third ink droplet information, the detection signal, and the second integration rule, and to determine the adjustment command based on the signal adjustment information, wherein the adjustment command is used to adjust the intensity of the detection signal. This invention uses a processing device to filter and compare the ink droplet information collected by the information determination device, and the control device determines the state of each inkjet nozzle based on the processing result of the processing device, thereby improving the accuracy of inkjet nozzle state detection and enhancing the printer's printing quality. The signal feedback device can determine the system's current information in real time and determine the adjustment command based on the current information. Based on the adjustment command, the intensity of the detection signal of the signal determination device is adjusted, which can regulate the working environment of some components in the system and enhance the system's stability. The solution addresses the problem that while a detection tube is placed at the location where the ink droplet passes, and the detection results from the detection tube are used to determine whether there is a blockage in the inkjet nozzle, the ink droplet signal detected by the detection tube is relatively weak, and the rate of change and accuracy of the signal are limited, which affects the detection results of the inkjet nozzle.

[0071] Example 3

[0072] This embodiment provides a printer that includes the inkjet nozzle state determination system described in any embodiment of the present invention.

[0073] The printer in this embodiment can use an inkjet nozzle status determination system to detect the status of each inkjet nozzle when inkjet nozzle status detection is required. This solves the problem that placing a detection tube at the location where ink droplets pass and determining whether an inkjet nozzle is blocked based on the detection results of the detection tube results in a weak ink droplet signal with limited rate of change and accuracy, which affects the inkjet nozzle detection results. Furthermore, the printer provided in this embodiment includes the inkjet nozzle status determination system of the above embodiment and possesses the corresponding beneficial effects of the above inkjet nozzle status determination system.

[0074] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A system for determining the state of an inkjet nozzle, characterized in that, include: The system includes an information determining device, a processing device, and a control device, wherein the processing device is connected to both the information determining device and the control device, and the processing device includes a first filtering module, a second filtering module, and a first amplification module. The information determining device is used to determine the initial ink droplet information of the inkjet device, wherein the inkjet device includes i inkjet nozzles, i is an integer, i≥1; The first filtering module is used to determine the first ink droplet information based on the initial ink droplet information and the first filtering rule; The second filtering module is used to determine the second ink droplet information based on the initial ink droplet information and the second filtering rule; The first amplification module is used to determine target ink droplet information based on the first ink droplet information, the second ink droplet information, and the first integration rule, wherein the first integration rule is a differential amplification rule for the first ink droplet information and the second ink droplet information; The control device is used to determine the state of each inkjet nozzle based on the target ink droplet information; The information determining device includes a signal transmitting module and a signal receiving module; The signal transmitting module is used to transmit a detection signal, wherein the propagation trajectory of the detection signal intersects with the reference inkjet trajectory of the inkjet device; The signal receiving module is used to receive the detection signal passing through the reference inkjet trajectory, and determine the initial ink droplet information based on the received detection signal; The inkjet nozzle status determination system further includes an information feedback device, wherein the information feedback device is connected to the information determination device, and the information feedback device includes a third filtering module and a second amplification module; The third filtering module is used to determine the third ink droplet information based on the initial ink droplet information and the third filtering rule; The second amplification module is used to determine signal adjustment information based on the third ink droplet information, the detection signal, and the second integration rule, and to determine an adjustment instruction based on the signal adjustment information, wherein the adjustment instruction is used to adjust the intensity of the detection signal, and wherein the second integration rule is a differential amplification rule for the third ink droplet information and the detection signal.

2. The system according to claim 1, characterized in that, The control device is specifically used to: determine the actual ink droplet signal of each inkjet orifice based on the target ink droplet information; and determine the state of each inkjet orifice based on the actual ink droplet signal of each inkjet orifice and the reference ink droplet signal of each inkjet orifice.

3. The system according to claim 2, characterized in that, The control device is specifically used to: determine whether the actual ink droplet signal of the inkjet orifice is consistent with the reference ink droplet signal of the inkjet orifice; if the actual ink droplet signal of the inkjet orifice is consistent with the reference ink droplet signal of the inkjet orifice, then determine that the state of the inkjet orifice is normal. If the actual ink droplet signal of the inkjet nozzle is inconsistent with the reference ink droplet signal of the inkjet nozzle, then the state of the inkjet nozzle is determined to be abnormal.

4. The system according to claim 3, characterized in that, The control device is also used to determine the faulty inkjet nozzle based on the identification information of the actual ink droplet signal of the inkjet nozzle after determining that the state of the inkjet nozzle is abnormal.

5. The system according to claim 1, characterized in that, The adjustment instructions include a first adjustment instruction and a second adjustment instruction; When the signal adjustment information meets the first adjustment requirement, the adjustment instruction is determined to be the first adjustment instruction, wherein the first adjustment requirement is that the current value of the signal adjustment information is greater than or equal to a first current threshold, and the first adjustment instruction is to reduce the intensity of the detection signal; When the signal adjustment instruction meets the second adjustment requirement, the adjustment instruction is determined to be the second adjustment instruction, wherein the second adjustment requirement is that the current value of the signal adjustment information is less than or equal to a second current threshold, and the second adjustment instruction is to increase the strength of the detection signal; Wherein, the first current threshold is greater than the second current threshold.

6. The system according to claim 1, characterized in that, The first filtering module includes a first resistor and a first capacitor, the second filtering module includes a second resistor and a second capacitor, and the first amplification module includes a first operational amplifier, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor. Wherein, the first terminal of the first capacitor is grounded, the second terminal of the first capacitor is connected to the second terminal of the first resistor and the first terminal of the fourth resistor, the first terminal of the first resistor is connected to the information determination device, the second terminal of the fourth resistor is connected to the third terminal of the first operational amplifier and the first terminal of the sixth resistor, the second terminal of the sixth resistor is connected to the fourth terminal of the first operational amplifier and the control device, the first terminal of the second capacitor is grounded, the second terminal of the second capacitor is connected to the second terminal of the second resistor and the first terminal of the fifth resistor, the first terminal of the second resistor is connected to the information determination device, the second terminal of the fifth resistor is connected to the first terminal of the first operational amplifier and the first terminal of the seventh resistor, the second terminal of the seventh resistor is grounded, the second terminal of the first operational amplifier is grounded, and the fifth terminal of the first operational amplifier is connected to the power signal.

7. The system according to claim 1, characterized in that, The third filtering module includes a third resistor and a third capacitor, and the second amplification module includes a second operational amplifier, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor. Wherein, the first terminal of the third capacitor is grounded, the second terminal of the third capacitor is connected to the second terminal of the third resistor and the first terminal of the eighth resistor, the first terminal of the third resistor is connected to the information determination device, the second terminal of the eighth resistor is connected to the third terminal of the second operational amplifier and the first terminal of the tenth resistor, the second terminal of the tenth resistor is connected to the fourth terminal of the second operational amplifier, the second terminal of the second operational amplifier is grounded, the first terminal of the second operational amplifier is connected to the first terminal of the ninth resistor and the first terminal of the eleventh resistor, the second terminal of the eleventh resistor is grounded, the second terminal of the ninth resistor is connected to the information determination device, the fifth terminal of the second operational amplifier is connected to the power signal, and the fourth terminal of the second operational amplifier is connected to the information determination device based on the adjustment unit.

8. A printer, characterized in that, Including the inkjet orifice status determination system as described in any one of claims 1 to 7.

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