Method for monitoring glue discharging precision through pulse number comparison

Abstract

The invention relates to the field of glue dispensing, and particularly discloses a method for monitoring glue output precision through pulse number comparison, which comprises the following steps: S1, initial parameter setting: carrying out initial setting on related parameters, and generating a corresponding PSO valve opening signal instruction; s2, calculating an expected pulse number: obtaining a corresponding conversion ratio according to a proportion that each unit of dispensing amount corresponds to one pulse, and obtaining the expected pulse number according to the conversion ratio and a preset glue output amount; s4, adjusting dispensing: acquiring an expected pulse number and an actual pulse number in the current period, comparing and analyzing the expected pulse number and the actual pulse number, and calculating an actual deviation value; according to the direction of the actual deviation value and the actual glue discharging amount, corresponding increase or decrease is carried out; and S5, monitoring and adjustment are cycled, and the dispensing adjustment step is continuously executed until the whole dispensing process is completed or preset conditions are met.

Description

Technical Field

[0001] The invention belongs to the field of glue dispensing, and in particular relates to a method for monitoring glue dispensing accuracy through pulse number comparison. Background Art

[0002] In modern industrial production, glue dispensing technology is widely used in electronics, semiconductors, automobiles, medical and other fields. However, when controlling the amount of glue, traditional glue dispensing equipment is often affected by many factors, such as equipment accuracy, changes in the working environment, glue characteristics, etc., which leads to deviations in glue output and affects product quality and production efficiency. In order to improve the accuracy and stability of glue dispensing, a more effective monitoring and control method is needed. Summary of the invention

[0003] The present invention provides a method for monitoring glue dispensing accuracy by comparing the number of pulses, and achieves precise control of the glue dispensing process through accurate signal conversion and real-time comparative monitoring, thereby solving the above-mentioned problem.

[0004] To solve the above problems, the present invention provides a technical solution as follows: a method for monitoring glue dispensing accuracy by comparing the number of pulses, a method for monitoring glue dispensing accuracy by comparing the number of pulses, and the steps are as follows:

[0005] S1 initial parameter settings:

[0006] Preliminary setting of relevant parameters and generation of corresponding PSO valve opening signal instructions;

[0007] S2 calculates the expected number of pulses:

[0008] According to the ratio of one pulse corresponding to each unit dispensing amount, the corresponding conversion ratio is obtained, and the expected number of pulses is obtained according to the conversion ratio and the preset dispensing amount;

[0009] S3 triggers dispensing action

[0010] The expected number of pulses is transmitted to the motion control card and triggers the PSO valve opening signal. The motion control card receives the instruction and converts it into a specific pulse signal, and sends the specific pulse signal to the piezoelectric valve controller. The piezoelectric valve controller processes and controls the piezoelectric valve to perform dispensing operations; S4 adjusts the dispensing

[0011] Obtain the expected number of pulses and the actual number of pulses in the current cycle, compare and analyze the two, and calculate the actual deviation value; according to the direction of the actual deviation value, increase or decrease the expected number of pulses accordingly; according to the actual glue output, increase or decrease the preset number of pulses accordingly;

[0012] S5 cycle monitoring and adjustment

[0013] Continue to execute the dispensing adjustment step until the entire dispensing process is completed or the preset conditions are met.

[0014] Preferably; the initial parameters of S1 include the expected number of pulses, the actual number of pulses, and the preset deviation threshold; the expected number of pulses represents the ideal output value calculated based on the dispensing volume set by the user; the actual number of pulses is the actual number of dispensing points generated after the piezoelectric valve controller is triggered; the preset deviation threshold is used to determine whether to adjust the dispensing parameters to compensate for possible errors.

[0015] Preferably; in S2, calculate the expected number of pulses. According to the preset dispensing volume and the preset conversion ratio, calculate the expected number of pulses required for the preset dispensing volume. The formula is as follows:

[0016]

[0017] E is the expected number of pulses;

[0018] A is the expected dispensing volume;

[0019] R is the conversion ratio, that is, the number of pulses corresponding to each unit of dispensing volume.

[0020] Preferably; in S3, adjust the dispensing. The formula for the actual deviation value is as follows:

[0021] D = ∣E - B∣

[0022] E is the expected number of pulses;

[0023] B is the actual number of pulses;

[0024] D is the actual deviation value, that is, the difference between E and B.

[0025] Preferably; T is the expected deviation threshold, used to determine whether adjustment is required; ΔE is the change in the expected number of pulses after adjustment; if the deviation D is greater than or equal to the expected deviation threshold T, then the dispensing parameters need to be adjusted.

[0026] Preferably; the adjustment method depends on whether the actual number of pulses B is less than or greater than the expected number of pulses E:

[0027] · If B < E, that is, the actual dispensing volume is insufficient, then increase the expected number of pulses, which can be expressed as:

[0028] ΔE = +Δ

[0029] If B > E, that is, the actual dispensing volume is excessive, then reduce the expected number of pulses, which can be expressed as:

[0030] ΔE = -Δ

[0031] Among them, Δ is an adjustment amount, usually preset, for example, set to the expected deviation threshold T, or adjusted proportionally according to the specific deviation magnitude.

[0032] Preferably; S4 adjusts the dispensing, and the steps are as follows:

[0033] S41: Obtain the expected pulse number E and the actual pulse number B from the motion control card and the piezoelectric valve controller respectively, calculate the actual deviation, and use D = ∣E - B∣ to calculate the actual deviation threshold D between the two.

[0034] S42: Determine whether it exceeds the threshold: Check whether the actual deviation threshold D exceeds the preset deviation threshold T.

[0035] S43: If D ≥ T, perform the adjustment operation.

[0036] If B < E, increase the expected pulse number, that is, ΔE = +T, to compensate for the insufficient part.

[0037] If B > E, decrease the expected pulse number, that is, ΔE = -T, to avoid overage.

[0038] S44: If D < T, it is considered that the current dispensing amount is within the acceptable range and no adjustment is required, and continue the dispensing operation or end.

[0039] Preferably; In S3, when triggering the dispensing action, the motion control card receives the instruction and converts it into a specific pulse signal. The pulse signal includes pulse width, frequency, and period; by adjusting the pulse width to adapt to different dispensing rates, the following formula can be used:

[0040] P = (Ct / F) * dc

[0041] P: Pulse width;

[0042] Ct: The time required for a complete pulse period;

[0043] F: The frequency of the pulse signal;

[0044] Dc: The duty cycle, that is, the proportion of the high level in a complete cycle.

[0045] Preferably; After receiving the pulse signal, the piezoelectric valve controller immediately parses it and uses it to drive the internal circuit, and then controls the action of the piezoelectric element; when the piezoelectric element is stimulated by an electrical signal, it will deform, and this deformation can quickly open or close the valve to achieve precise dispensing control.

[0046] Compared with the prior art, the beneficial effect is that, by adopting the above-mentioned scheme, in order to improve the dispensing accuracy, the present invention controls the number of dispensing points of the piezoelectric valve by a pulse signal, thereby realizing high-precision dispensing control; the stability of the system is enhanced, and through the closed-loop monitoring system, the monitoring pulse signal and the actual number of dispensing points are compared in real time to ensure the stability of the dispensing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0049] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0050] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "fixed", "integrally formed", "left", "right" and similar expressions used in this specification are for illustrative purposes only. In the drawings, units with similar structures are marked with the same reference numerals.

[0051] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0052] like Figure 1 As shown, one embodiment of the present invention is: a method for monitoring glue dispensing accuracy by comparing the number of pulses, the steps of which are as follows:

[0053] S1 initial parameter settings:

[0054] Preliminary setting of relevant parameters and generation of corresponding PSO valve opening signal instructions;

[0055] S2 calculates the expected number of pulses:

[0056] According to the ratio of one pulse corresponding to each unit dispensing amount, the corresponding conversion ratio is obtained, and the expected number of pulses is obtained according to the conversion ratio and the preset dispensing amount;

[0057] S3 triggers dispensing action

[0058] The expected number of pulses is transmitted to the motion control card and triggers the PSO valve opening signal. The motion control card receives the instruction and converts it into a specific pulse signal, and sends the specific pulse signal to the piezoelectric valve controller. The piezoelectric valve controller processes and controls the piezoelectric valve to perform dispensing operations.

[0059] S4 Adjustment of dispensing

[0060] Obtain the expected number of pulses and the actual number of pulses in the current cycle, compare and analyze the two, and calculate the actual deviation value; according to the direction of the actual deviation value, increase or decrease the expected number of pulses accordingly; according to the actual glue output, increase or decrease the preset number of pulses accordingly;

[0061] S5 cycle monitoring and adjustment

[0062] Continue to perform the adjustment dispensing steps until the entire dispensing process is completed or the preset conditions are met.

[0063] It should be noted that the algorithms in each of the above steps are designed to ensure that the dispensing process can be carried out accurately and stably. Through the closed-loop monitoring mechanism, even if external conditions change or there are slight inconsistencies in internal components, timely adjustments can be made to make the final dispensing amount as close to the set target value as possible. In addition, through real-time data collection and feedback, not only the accuracy of dispensing is improved, but also the flexibility and adaptability of the system are enhanced to meet the special requirements of different application scenarios.

[0064] S1 initial parameter setting

[0065] The relevant parameters are preliminarily set, and the corresponding PSO valve opening signal instructions are generated. It should be noted that the S1 initial parameters include the expected number of pulses, the actual number of pulses, the expected dispensing amount, and the preset deviation threshold. The expected number of pulses represents the output value calculated based on the dispensing amount set by the user. The actual number of pulses refers to the actual number of dispensing points generated after the piezoelectric valve controller is triggered. The preset deviation threshold is used to determine whether the dispensing parameters need to be adjusted to compensate for possible errors.

[0066] Deviation threshold is a key parameter used in the dispensing control system to determine whether there is a significant difference between the actual amount of glue discharged and the expected amount of glue discharged. It defines the maximum allowable error range. When the deviation between the actual number of pulses and the expected number of pulses exceeds this preset threshold, the system will trigger the adjustment mechanism to correct the deviation; it can avoid unnecessary frequent adjustments while ensuring the dispensing accuracy, thereby improving work efficiency. In addition, it can also enhance the robustness of the system, enabling it to better cope with the influence of various uncertain factors.

[0067] A threshold that is too low may cause the system to be overly sensitive, requiring frequent fine-tuning and increasing control complexity; while a threshold that is too high may not capture important deviations in a timely manner, affecting the final dispensing quality.

[0068] Therefore, in practical applications, it is usually necessary to make comprehensive considerations based on specific dispensing requirements, equipment characteristics, and working environment.

[0069] S2 calculates the expected number of pulses

[0070] According to the ratio of one pulse corresponding to each unit of glue dispensing amount, the corresponding conversion ratio is obtained, and the expected number of pulses is obtained according to the conversion ratio and the preset glue output amount.

[0071] Note: The formula for the expected number of pulses is as follows:

[0072] E is the expected number of pulses

[0073] A is the expected adhesive amount, which is the amount of adhesive the user wants to dispense.

[0074] R is the conversion ratio, which is the number of pulses corresponding to each unit of dispensing volume.

[0075] Then the expected number of pulses E can be calculated by the following formula:

[0076]

[0077] Formula Explanation

[0078] A: This is the specific value set by the user in the dispensing software, which represents the amount of glue that needs to be output. This value is usually determined according to actual production needs.

[0079] R: This is a predefined proportional factor that reflects the hardware characteristics of the dispensing equipment, that is, how many pulses should correspond to each unit of dispensing volume determined during system design. For example, if R = 2, it means that for each unit of dispensing volume, the system needs to send two pulse signals.

[0080] E: The result calculated by the above formula represents the number of pulses that the motion control card needs to send to the piezoelectric valve controller in order to achieve the dispensing volume set by the user.

[0081] Application Examples

[0082] Assuming that the user wants the expected dispense amount to be A = 10 units, and the conversion ratio of the system is known to be R = 2 (meaning that every 2 units of dispense amount corresponds to 1 pulse), then the expected number of pulses E is:

[0083] E=10 / 2=5

[0084] This means that in order to complete this dispensing operation, the motion control card needs to send 5 pulses to the piezoelectric valve controller to ensure that the dispensing amount reaches exactly 10 units.

[0085] Precautions

[0086] In practical applications, both the conversion ratio R and the expected dispensing volume A should be positive numbers, and R should not be zero to avoid the error of dividing by zero. In addition, there may be some errors or deviations in the actual dispensing process, so the algorithm actually used may also need to consider these factors and make appropriate adjustments.

[0087] S3 triggers dispensing action

[0088] The expected number of pulses is transmitted to the motion control card and triggers the PSO valve opening signal. The motion control card receives the instruction and converts it into a specific pulse signal, and sends the specific pulse signal to the piezoelectric valve controller. The piezoelectric valve controller processes and controls the piezoelectric valve to perform the dispensing operation; 10. It should be noted that: in the S3 trigger dispensing action, the motion control card receives the instruction and converts it

[0089] is a specific pulse signal, which includes pulse width, frequency and period. By adjusting the pulse width to adapt to different dispensing rates, the following formula can be used:

[0090] P=(Ct / F)*dc

[0091] P: pulse width;

[0092] Ct: the time required for a complete pulse cycle;

[0093] F: frequency of pulse signal;

[0094] Dc: is the duty cycle, that is, the proportion of high level in a complete cycle;

[0095] After receiving the pulse signal, the piezoelectric valve controller immediately analyzes it and uses it to drive the internal circuit, thereby controlling the movement of the piezoelectric element; when the piezoelectric element is stimulated by an electrical signal, it will deform, and this deformation can quickly open or close the valve to achieve precise dispensing control.

[0096] S4 Adjust dispensing

[0097] Obtain the expected number of pulses and the actual number of pulses within the current cycle, compare and analyze the two, and calculate the actual deviation value; according to the direction of the actual deviation value, increase or decrease the expected number of pulses accordingly; according to the actual dispensing volume situation, increase or decrease the preset number of pulses accordingly;

[0098] It should be noted that: by comparing the expected number of pulses and the actual number of pulses to determine whether there is a deviation, and adjusting the subsequent dispensing parameters according to the deviation situation to ensure the accuracy of the dispensing volume. This process is part of a closed-loop control system, which helps the system correct errors in real time and ensure the consistency and accuracy of the output.

[0099] The formula for the actual deviation value is as follows:

[0100] D = ∣E - B∣

[0101] E is the expected number of pulses;

[0102] B is the actual number of pulses;

[0103] D is the actual deviation value, that is, the difference between E and B;

[0104] T is the expected deviation threshold, used to determine whether adjustment is needed

[0105] ΔE is the change amount of the adjusted expected number of pulses

[0106] If the deviation D is greater than or equal to the expected deviation threshold T, then the dispensing parameters need to be adjusted. The adjustment method depends on whether the actual number of pulses B is less than or greater than the expected number of pulses E:

[0107] · If B < E, that is, the actual dispensing volume is insufficient, then increase the expected number of pulses, which can be expressed as: ΔE = +Δ

[0108] If B > E, that is, the actual dispensing volume is excessive, then decrease the expected number of pulses, which can be expressed as: ΔE = -Δ

[0109] Among them, Δ is an adjustment amount, usually preset, for example, set to the expected deviation threshold T, or adjusted proportionally according to the specific deviation magnitude.

[0110] Determine the dispensing accuracy requirements: First, clarify the user's specific requirements for dispensing accuracy, which determines the basic range of the deviation threshold. For example, if the product has very strict regulations on the dispensing position and quantity, a smaller deviation threshold should be selected.

[0111] Evaluate equipment performance: Understand the capabilities and technical indicators of the dispensing equipment used, such as the minimum controllable pulse width, repeated positioning accuracy, etc., which will affect the setting of the deviation threshold. Consider external interference factors: Considering that changes in external conditions such as temperature and humidity may cause changes in the amount of glue dispensed, appropriately loosening or tightening the deviation threshold can make the system more stable and reliable.

[0112] Experimental verification: Through a series of experiments, test the performance of the deviation threshold under different conditions and find the optimal value. For example, run the dispensing task in different production environments, record and analyze the results each time, and gradually optimize the threshold setting.

[0113] Real-time monitoring of usage scenarios: During the entire dispensing process, the system continuously monitors the actual number of pulses and compares it with the expected number of pulses. Once the actual deviation threshold is found to exceed the expected deviation threshold, that is, |EA|≥T, where E is the expected number of pulses, A is the actual number of pulses, and T is the expected deviation threshold, the adjustment process is initiated.

[0114] Adjustment mechanism: If the actual glue output is insufficient, the expected pulse number will be increased to compensate for the deficiency; conversely, if it is excessive, the expected pulse number will be reduced to avoid excess. The adjusted parameters will be applied to the next dispensing operation to gradually approach the ideal dispensing effect.

[0115] Feedback loop: The system continuously repeats the above monitoring and adjustment process to form a closed-loop control system to ensure that each dispensing can achieve the expected accuracy.

[0116] Precautions

[0117] In practical applications, the setting of the expected deviation threshold should be flexible and able to be dynamically adjusted during operation to adapt to different working conditions and requirements.

[0118] System designers also need to consider other factors that may affect dispensing accuracy, such as equipment aging, changes in material properties, etc., and adjust the expected deviation threshold in a timely manner to maintain optimal performance. In addition, the setting of the expected deviation threshold should also follow certain rules, such as using the standard deviation as a reference and using statistical methods to determine a reasonable threshold range to ensure that it is neither too conservative nor too radical.

[0119] In summary, the expected deviation threshold is an important part of the dispensing control system. Its correct setting helps to achieve efficient and stable dispensing operations, and also improves the overall quality of the product.

[0120] 1. First, obtain the expected number of pulses E and the actual number of pulses B from the motion control card and the piezoelectric valve controller respectively, and calculate the actual deviation: Use the above formula D = ∣E - B∣

[0121] to calculate the actual deviation D between the two.

[0122]

[0123] 2. Determine whether it exceeds the threshold: Check whether the deviation D exceeds the preset deviation threshold T.

[0124] 3. Adjust the parameters:

[0125] o If D ≥ T, perform the adjustment operation.

[0126] · If B < E, increase the expected number of pulses, that is, ΔE = +T, to compensate for the insufficient part.

[0127] · If B > E, decrease the expected number of pulses, that is, ΔE = -T, to avoid excess.

[0128] o If D < T, it is considered that the current dispensing volume is within the acceptable range and no adjustment is required. Continue the dispensing operation or end.

[0129] 4. Restart the dispensing: Once the adjustment is made, the system will recalculate the new expected number of pulses and start the dispensing operation again to apply the updated parameters.

[0130] Application example

[0131] Assume:

[0132] · The expected number of pulses E = 500

[0133] · The actual number of pulses B = 480

[0134] · The expected deviation threshold T = 5. Calculate the actual deviation value D = ∣500 - 480∣ = 20. Obviously, D ≥ T, so adjustment is required.

[0135] · Since B < E, it means that the actual glue output is insufficient, so the expected number of pulses should be increased,

[0136] for example, ΔE = +5. The new expected number of pulses after adjustment will be E′ = E + ΔE = 505.

[0137] Next, the system will use this new expected number of pulses E′ to trigger the next dispensing operation, and gradually approach the ideal dispensing volume in this way.

[0138] Precautions

[0139] ​In actual implementation, the adjustment amount Δ is not necessarily fixed, and can also be dynamically adjusted based on the ratio of the deviation or other more complex algorithms.

[0140] The system may also need to consider other factors, such as equipment response time, ambient temperature, etc., which may affect the final dispensing effect, so these variables should be fully considered.

[0141] In order to improve the dispensing accuracy, the number of dispensing points of the piezoelectric valve is controlled by pulse signals, achieving high-precision dispensing control; the stability of the system is enhanced, and the closed-loop monitoring system is used to compare the monitoring pulse signal with the actual number of dispensing points in real time to ensure the stability of the dispensing process.

[0142] It should be noted that the above-mentioned technical features are further combined with each other to form various embodiments not listed above, which are all deemed to be within the scope of the present invention; and, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for monitoring glue dispensing accuracy by comparing the number of pulses, characterized in that; A method for monitoring the dispensing accuracy by comparing the number of pulses, the steps are as follows: S1 Initial parameter setting: Preliminarily set the relevant parameters and generate the corresponding PSO valve opening signal instruction; S2 Calculate the expected number of pulses: According to the ratio of one pulse corresponding to each unit of dispensing volume, obtain the corresponding conversion ratio, and obtain the expected number of pulses according to the conversion ratio and the preset dispensing volume; S3 Trigger the dispensing action The expected number of pulses is transmitted to the motion control card and triggers the PSO valve opening signal. The motion control card receives the instruction and converts it into a specific pulse signal, and sends the specific pulse signal to the piezoelectric valve controller. The piezoelectric valve controller processes and controls the piezoelectric valve to perform the dispensing operation; S4 Adjust the dispensing Obtain the expected number of pulses and the actual number of pulses in the current cycle, and compare and analyze the two to calculate the actual deviation value; according to the direction of the actual deviation value, increase or decrease the expected number of pulses accordingly; according to the actual dispensing volume situation, increase or decrease the preset number of pulses accordingly; S5 Loop monitoring and adjustment Continue to execute the step of adjusting the dispensing until the entire dispensing process is completed or the preset conditions are met.

2. The method for monitoring glue dispensing accuracy by comparing the number of pulses according to claim 1, characterized in that: The initial parameters in S1 include the expected number of pulses, the actual number of pulses and the preset deviation threshold; the expected number of pulses represents the ideal output value calculated according to the dispensing volume set by the user; the actual number of pulses is the actual number of dispensing points generated after the piezoelectric valve controller is triggered; The preset deviation threshold is used to judge whether it is necessary to adjust the dispensing parameters to compensate for possible errors.

3. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 1, characterized in that: S2 Calculate the expected number of pulses. According to the preset dispensing volume and the preset conversion ratio, calculate the expected number of pulses required for the preset dispensing volume. The formula is as follows: E is the expected number of pulses; A is the expected dispensing volume; R is the conversion ratio, that is, the number of pulses corresponding to each unit of dispensing volume.

4. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 1, characterized in that: S3 Adjust the dispensing. The formula for the actual deviation value is as follows: D = ∣E - B∣ E is the expected number of pulses; B is the actual number of pulses; D is the actual deviation value, that is, the difference between E and B.

5. The method for monitoring glue dispensing accuracy by comparing the number of pulses according to claim 4, characterized in that: T is the expected deviation threshold, used to determine whether adjustment is needed; ΔE is the change amount of the adjusted expected number of pulses; if the deviation D is greater than or equal to the expected deviation threshold T, then the dispensing parameters need to be adjusted.

6. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 5, characterized in that; The adjustment method depends on whether the actual number of pulses B is less than or greater than the expected number of pulses E: · If B < E, i.e., the actual glue output is insufficient, the expected pulse number can be increased, which can be expressed as: ΔE = +Δ If B > E, that is, the actual dispensing volume is too much, then reduce the expected number of pulses, which can be expressed as: ΔE = -Δ Among them, Δ is an adjustment amount, usually preset, for example, set to the expected deviation threshold T, or adjusted proportionally according to the specific deviation size.

7. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 5, characterized in that; S4 Adjust the dispensing, the steps are as follows: S41: Obtain the expected number of pulses E and the actual number of pulses B from the motion control card and the piezoelectric valve controller respectively, calculate the actual deviation, and use D = ∣E - B∣ to calculate the actual deviation threshold D between the two S42: Judge whether it exceeds the threshold: Check whether the actual deviation threshold D exceeds the preset deviation threshold T; S43: If D ≥ T, then perform the adjustment operation; If B < E, then increase the expected number of pulses, that is, ΔE = +T, to compensate for the insufficient part; If B > E, then reduce the expected number of pulses, that is, ΔE = -T, to avoid overage; S44: If D < T, it is considered that the current dispensing volume is within the acceptable range and no adjustment is required. Continue with the dispensing operation or end it.

8. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 1, characterized in that: In the S3 trigger dispensing action, the motion control card receives the instruction and converts it into specific pulse signals. The pulse signals include pulse width, frequency, and period. By adjusting the pulse width to adapt to different dispensing rates, the following formula can be used: P = (Ct / F) * dc P: Pulse width; Ct: The time required for a complete pulse cycle; F: The frequency of the pulse signal; Dc: The duty cycle, that is, the proportion of the high level within a complete cycle.

9. The method for monitoring glue dispensing accuracy by comparing pulse numbers according to claim 8, characterized in that; After receiving the pulse signal, the piezoelectric valve controller immediately analyzes it and uses it to drive the internal circuit, thereby controlling the action of the piezoelectric element. When the piezoelectric element is stimulated by an electrical signal, it will deform, and this deformation can quickly open or close the valve to achieve precise dispensing control.

Images