Residue monitoring method and system of gluing equipment

Abstract

The invention relates to a residual amount monitoring method and system of gluing equipment. The residual amount monitoring method and system are suitable for detecting the residual amount of glue in a glue spraying needle cylinder. The method comprises the steps that after air in a glue spraying needle cylinder is pumped out and negative pressure is formed, compressed air is filled into the needle cylinder; when the air pressure reaches a set threshold value, inflation is stopped; and estimating the residual glue volume according to the volume of the filled air and the total volume of the needle cylinder. The air volume is obtained through calculation of the gas flow rate and the inflation duration. The system further has threshold value judgment and alarm functions, and if the residual glue amount is lower than a set glue amount threshold value, an alarm signal is output. The invention further provides a system structure matched with the method. The system structure comprises pneumatic equipment, an air pressure detection module, a flow velocity monitoring module, a control module and the like. The residual glue amount of the glue spraying needle cylinder can be accurately and efficiently detected on the premise of not additionally changing the structure, and the glue spraying needle cylinder residual glue amount detection device has a good application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial automation control, in particular to a glue amount monitoring method and system of a glue applying device. BACKGROUND

[0002] In the process of automatic production and precise dispensing, glue applying devices are widely used for quantitative glue applying operation on products. As one of the core components of glue applying devices, glue injection syringes usually store glue to be injected inside. In order to ensure the continuity and stability of dispensing, the remaining glue amount in the syringe needs to be monitored in time to prevent insufficient glue from causing glue breakage, affecting product quality, and even damaging the equipment.

[0003] The common glue amount detection methods currently include weighing method, visual recognition method or sensor capacitance detection method, but these methods have problems such as high cost, complex integration, easy to be disturbed by environment, and difficult to realize real-time and accurate detection of the glue amount in a closed syringe. Therefore, there is an urgent need for a glue amount monitoring method and system with simple structure, low cost and high monitoring precision. SUMMARY

[0004] The purpose of the present application is to overcome the problems of poor real-time performance, high cost, complex integration, poor adaptability and the like existing in the glue amount monitoring method of the glue applying syringe.

[0005] According to an aspect of the present application, a glue amount monitoring method of a glue applying device is provided for detecting the remaining glue amount in a glue injection syringe of the glue applying device, comprising: S1, extracting air in the glue injection syringe; S2, filling air into the glue injection syringe; S3, detecting the air pressure in the glue injection syringe, and stopping air filling when the air pressure in the glue injection syringe reaches a preset air pressure threshold; S4, calculating the volume of the remaining glue amount in the glue injection syringe according to the volume of the filled air, and the formula is:

[0006] In the formula, is the remaining glue amount in the glue injection syringe; is the volume of the glue injection syringe; is the volume of the compressed air filled into the glue injection syringe after reaching the preset air pressure threshold.

[0007] Preferably, the S2 comprises filling air into the glue injection syringe through a pressure filling unit; and correspondingly, the calculation method of the volume of the air filled into the glue injection syringe in the S4 is:

[0008] In the formula, The volume of air that is filled into the glue spray syringe; This refers to the air pressure in the pre-inflation pressurization unit; This refers to the air pressure in the pressurization unit after inflation. Standard atmospheric pressure; This refers to the volume of the pressurization unit.

[0009] Preferably, the process after step S4 further includes: S5. Determine whether the volume of the remaining adhesive in the glue spraying syringe is lower than the preset adhesive volume threshold. If so, output an alarm signal.

[0010] Preferably, the glue amount threshold is defined as follows: the negative pressure suction force when the air is extracted from the glue spraying syringe is less than the weight of the remaining glue in the glue spraying syringe.

[0011] Preferably, the formula for calculating the adhesive content threshold is:

[0012] In the formula, This is the threshold for adhesive content; The absolute value of the negative pressure used to extract air from the glue spray syringe; A is the cross-sectional area of ​​the glue spraying syringe; The density of the adhesive in the spray syringe; g is the acceleration due to gravity.

[0013] Preferably, the interval between S1 and S2 further includes: S6. Detect the initial negative pressure value after aspiration; when the initial negative pressure value is less than the negative pressure threshold, determine that there is no glue in the syringe and output an alarm signal.

[0014] The present invention also provides a residual monitoring system for an adhesive coating equipment, which applies the above-mentioned residual monitoring method and includes: Glue spray syringe; A pneumatic device is connected to the glue spraying syringe via a pipeline. The pneumatic device includes a pressurizing unit and a negative pressure unit. The pressurizing unit is used to provide compressed air to the glue spraying syringe to drive glue dispensing, and the negative pressure unit is used to evacuate the glue spraying syringe to create a negative pressure environment. An air pressure detection module is used to detect the air pressure of the glue spraying syringe and the tubing; A flow rate and time monitoring module is used to collect the air flow rate and duration during the process of the pressurization unit supplying compressed air to the glue spraying syringe; The adhesive quantity detection module is used to calculate the remaining volume of the adhesive spraying syringe based on the air pressure, flow rate and time parameters, and to determine the remaining adhesive quantity accordingly.

[0015] Preferably, the margin monitoring system further includes: An alarm module, connected to the glue quantity detection module, is used to output an alarm signal when the remaining glue quantity in the glue spraying syringe is detected to be lower than a preset glue quantity threshold.

[0016] Preferably, the margin monitoring system further includes: The control module is connected to both the pneumatic device and the alarm module, and is used to send a control signal to the pneumatic device when the alarm signal is received.

[0017] Preferably, the control module includes: A solenoid valve is used to control the glue spraying syringe to connect with the negative pressure unit or the pressurizing unit according to the control signal.

[0018] This application offers the following advantages: It enables non-contact estimation of remaining adhesive volume by detecting the compressed volume and inflation rate of air within the syringe. An automatic alarm is triggered when the remaining adhesive level falls below a set threshold, preventing process interruptions due to adhesive depletion. The integration of an air pressure detection module, a flow rate and time monitoring module, and a control module enables automatic control and feedback linkage. No major modifications to the syringe structure are required, making it suitable for various syringe structures and adhesive application equipment. The detection of the negative pressure stage further enhances monitoring reliability by determining whether the syringe is empty. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a logic block diagram of the residual amount monitoring method for the adhesive coating equipment according to an embodiment of this application; Figure 2 This is a logic block diagram of a method for monitoring the remaining amount of adhesive coating equipment according to another embodiment of this application; Figure 3 This is a logic block diagram of a method for monitoring the remaining amount of adhesive coating equipment according to another embodiment of this application; Figure 4This is a schematic diagram of the residual monitoring system of the glue coating equipment according to one embodiment of this application; The following are the reference numerals: 100, Balance monitoring system; 10, Glue spray syringe; 20, Pneumatic equipment; 21, Pressurization unit; 22, Negative pressure unit; 30, Air pressure detection module; 40, Flow rate and time monitoring module; 50, Solenoid valve; 60, Piping. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figure 1 As shown, one embodiment of this application provides a method for monitoring the remaining amount of adhesive in a glue coating equipment, used to detect the amount of remaining adhesive in the glue spraying syringe 10 of the glue coating equipment, including: S1. Extract the air from the glue spray syringe 10; S2. Inject air into the glue spraying syringe 10; S3. Detect the air pressure inside the glue spraying syringe 10. When the air pressure inside the glue spraying syringe 10 reaches the preset air pressure threshold, stop the inflation. S4. Calculate the volume of remaining adhesive in the glue spray syringe 10 based on the volume of air filled in. The formula is:

[0024] In the formula, The amount of adhesive remaining in the glue spray syringe 10; The volume of the glue spray syringe 10; The volume of compressed air after it reaches a preset air pressure threshold is filled into the glue spray syringe 10.

[0025] In this embodiment, it should be noted that the air extraction operation can be achieved through the negative pressure unit 22 in the pneumatic device 20, creating a certain degree of vacuum to remove as much air as possible from the top of the colloid inside the syringe. The subsequent inflation operation is performed by the pressurization unit 21, injecting compressed air into the syringe. Since the colloid originally occupies part of the space inside the syringe, the volume occupied by the injected air when the set air pressure threshold is reached can be used to deduce the space in the syringe not occupied by air, which is the remaining volume of the colloid. During the inflation process, the system acquires airflow velocity and pipeline pressure data in real time through flow sensors and air pressure sensors, and corrects them with atmospheric pressure standards to accurately calculate the effective volume of the injected air. In addition, the setting of the air pressure threshold should comprehensively consider factors such as the structural strength, safety factor, and sealing performance of the adhesive spraying syringe 10 to ensure accurate estimation without causing structural risks to the syringe.

[0026] The above method enables non-contact estimation of remaining adhesive by detecting the compressed volume and inflation rate of air in the syringe. An automatic alarm is triggered when the remaining adhesive level falls below a set threshold, preventing process interruptions due to adhesive depletion. An integrated air pressure detection module 30, flow rate and time monitoring module, and control module enable automatic control and feedback linkage. No major modifications to the syringe structure are required, making it suitable for various syringe structures and adhesive application equipment. Detection during the negative pressure phase further enhances monitoring reliability by determining whether the syringe is empty.

[0027] Specifically, S2 includes: filling the glue spraying syringe 10 with air through the pressurization unit 21; correspondingly, the volume of air filled into the glue spraying syringe 10 in S4 is calculated as follows:

[0028] In the formula, The volume of air that is filled into the glue spray syringe 10; The air pressure in the pre-inflation pressurization unit 21; The air pressure in the inflation unit 21 after inflation; Standard atmospheric pressure; The volume of the pressurization unit 21.

[0029] It should be noted that the air extraction operation can be achieved by the negative pressure unit 22 in the pneumatic device 20, forming a certain degree of vacuum state, so that air is removed as much as possible above the colloid in the syringe, and the initial negative pressure value P1 in the syringe is recorded at this time.

[0030] The subsequent inflation operation is performed through a pressurization unit 21 (such as an air canister with a known volume of V1). Before inflation begins, the system first measures the initial air pressure P1 within the pressurization unit 21. Then, compressed air is injected from the pressurization unit 21 into the glue spray syringe 10. After inflation is complete, the system again measures the remaining air pressure P2 within the pressurization unit 21 and the air pressure P2 within the glue spray syringe 10 (which should reach a preset air pressure threshold).

[0031] Specifically, the calculation method for the volume of air filled into the glue spray syringe 10 is as follows:

[0032] In the formula, The volume of air that is filled into the glue spray syringe 10; The air pressure in the pre-inflation pressurization unit 21; The air pressure in the inflation unit 21 after inflation; Standard atmospheric pressure; The volume of the pressurization unit 21.

[0033] Because the syringe originally contained colloid, which occupied some space, the calculated volume of injected air was affected. We can deduce that the space in the syringe not occupied by air is the remaining volume of the colloid. .

[0034] This method directly calculates the standard-state air volume of the glue-spraying syringe 10 by measuring the pressure change of the pressurizing unit 21 before and after inflation and combining it with its fixed volume. This method eliminates the need for real-time monitoring of airflow rate and pipeline 60 pressure, simplifying the system structure (eliminating the need for a flow sensor) and computational complexity (avoiding integral calculations). It is suitable for industrial scenarios where real-time performance requirements are not high but high reliability is required. The setting of the air pressure threshold P2 should comprehensively consider factors such as the structural strength of the glue-spraying syringe 10, the safety factor, and the sealing performance of the glue, to ensure accurate estimation without posing a structural risk to the syringe.

[0035] In an optional embodiment, the volume of air filled into the glue spray syringe can also be calculated as follows:

[0036] In the formula, The volume of air filled into the glue spray syringe; Q(t) is the real-time gas flow rate during the inflation phase; This represents the real-time pressure in pipeline 60 at the corresponding moment. Standard atmospheric pressure; and These are the inflation start time and inflation end time, respectively.

[0037] Alternatively, discretization can be used to approximate the integral, for example, by sampling once per second and summing the results:

[0038] In the formula, , Let the flow rate and air pressure be the flow rate and air pressure in the i-th time slice. This is the sampling interval. This method is simpler to implement in hardware, has lower computational resource overhead, and is suitable for embedded systems and industrial field applications.

[0039] like Figure 2 As shown, in one specific embodiment, after S4, the method further includes: S5, determining whether the volume of remaining adhesive in the glue spraying syringe 10 is lower than a preset adhesive volume threshold; if so, an alarm signal is output. In this embodiment, it should be noted that the preset adhesive volume threshold can be set according to actual application requirements. The setting principle is to ensure that after issuing an alarm signal, the system still has enough remaining adhesive to complete the current task or smoothly switch to the replenishment operation process, so as to prevent production continuity or product quality from being affected by adhesive depletion.

[0040] In addition, to improve the reliability and practicality of the detection, the following factors should be considered when setting this threshold: Operating conditions and cycle time requirements: In high-speed dispensing or continuous operation mode, a higher alarm threshold should be set to allow sufficient switching time; Control system responsiveness: Whether the system can quickly perform subsequent actions such as stopping the machine, changing the glue, or switching to a spare syringe once the alarm signal is triggered also affects the threshold setting strategy.

[0041] Furthermore, the alarm signal can be received by the system control module and used to trigger the following operations: issue an audible and visual alarm to prompt the operator; control the solenoid valve 50 to close the glue dispensing path to prevent dry dispensing; automatically switch to the backup syringe (if available) or enter the standby glue replenishment state; and record the current status in the system log for easy traceability and maintenance.

[0042] In one specific embodiment, the glue amount threshold is that the negative pressure suction force when the air in the glue spraying syringe 10 is less than the weight of the remaining glue in the glue spraying syringe 10.

[0043] The formula for calculating the adhesive content threshold is:

[0044] In the formula, This is the threshold for adhesive content; The absolute value of the negative pressure for extracting air from the glue spray syringe 10; A is the cross-sectional area of ​​the glue spraying syringe 10; The density of the adhesive in the glue spray syringe 10; g is the acceleration due to gravity.

[0045] In this embodiment, it should be noted that the setting of the adhesive volume threshold is based on the force balance relationship between the negative pressure suction and the weight of the adhesive. The core idea is that when the suction generated by the negative pressure formed by vacuuming is insufficient to overcome the gravity of the adhesive, it indicates that the amount of adhesive in the syringe is close to or below the lower limit. The adhesive will not move upward with the negative pressure or change significantly. At this time, it can be determined that the amount of adhesive is insufficient, and an alarm should be set in time to prompt replacement or replenishment.

[0046] The specific explanation is as follows: Mechanical principle explanation: When a vacuum is drawn into the glue spray syringe 10, a lower air pressure (negative pressure) is formed inside the syringe. This negative pressure acts on the cross-section of the syringe, generating an upward suction force, the magnitude of which is:

[0047] in, A is the absolute value of the negative pressure, and A is the cross-sectional area of ​​the glue spraying syringe 10.

[0048] At the same time, the remaining adhesive exerts a downward pull due to gravity, which is its own weight.

[0049] in, The density of the adhesive solution, Let g be the volume of the remaining adhesive, and g be the acceleration due to gravity.

[0050] when When the time comes, the solution can be obtained. , that is This formula represents the glue content threshold. The calculation formula.

[0051] This method requires no additional precision sensors; it determines the adhesive quantity solely based on negative pressure and structural parameters, making it suitable for cost-sensitive scenarios. It can serve as a redundant detection method, operating in parallel with the aforementioned pressure-volume estimation method to improve system robustness. It is performed quickly after evacuation, adding almost no increase to system response time. By establishing a "suction < gravity" judgment logic, a simple and effective physical model is used to accurately determine the lower limit of adhesive quantity, contributing to enhanced equipment intelligence and automatic monitoring capabilities.

[0052] like Figure 3As shown, in an optional embodiment, S6 is further included between S1 and S2: detecting the initial negative pressure value after aspiration; when the initial negative pressure value is less than the negative pressure threshold, it is determined that there is no glue in the syringe and an alarm signal is output.

[0053] In this embodiment, it should be noted that this step is based on the air pressure response at the initial stage of evacuation to quickly determine whether there is adhesive in the spray syringe 10. The basic principle is as follows: if there is basically no adhesive in the spray syringe 10 and the inside of the syringe is almost a gas phase environment, then during the evacuation operation, the air pressure inside the syringe will rapidly drop to near the set limit negative pressure value; however, if there is still adhesive in the syringe, especially if the adhesive occupies a certain volume, the liquid is not easily compressed during the evacuation process, which will significantly slow down the rate of negative pressure formation, causing the initial negative pressure value to fail to reach the limit value quickly.

[0054] Therefore, the initial negative pressure value collected during the pumping phase can be compared with the preset negative pressure threshold, as follows: If the initial negative pressure value is detected to be lower than the preset negative pressure threshold (i.e., a strong negative pressure is formed), it indicates that the gas content in the syringe is extremely high, and it can be basically determined that there is no glue. If the negative pressure value does not reach the threshold, it means that there is still a certain amount of adhesive in the syringe.

[0055] To improve detection accuracy, the "initial negative pressure value" can be collected within a short time window after the start of aspiration, such as the negative pressure change value within 0.1 to 0.5 seconds. The negative pressure threshold is preset based on the syringe structure, aspiration rate and physical properties of the adhesive.

[0056] This method enables rapid detection and alarm prompts for glue-free states during the degassing stage without inflation or glue volume calculation, significantly improving monitoring efficiency. It is particularly suitable for scenarios such as self-testing of glue coating equipment startup, initial loading, or empty syringe detection before glue replacement.

[0057] like Figure 4 As shown, the present invention also provides a residual monitoring system 100 for an adhesive coating equipment, which applies the above-described residual monitoring method and includes: 10 glue spray syringes; Pneumatic device 20 is connected to glue spraying syringe 10 via pipeline 60. Pneumatic device 20 includes a pressurizing unit 21 and a negative pressure unit 22. The pressurizing unit 21 is used to provide compressed air to the glue spraying syringe 10 to drive glue dispensing. The negative pressure unit 22 is used to evacuate the glue spraying syringe 10 to form a negative pressure environment. The air pressure detection module 30 is used to detect the air pressure of the glue spraying syringe 10 and the tubing 60; The flow rate and time monitoring module 40 is used to collect the air flow rate and duration during the process of the pressurization unit 21 supplying compressed air to the glue spraying syringe 10. The adhesive quantity detection module is used to calculate the remaining volume of the adhesive spraying syringe 10 based on air pressure, flow rate and time parameters, and to determine the remaining adhesive quantity accordingly.

[0058] In this embodiment, it should be noted that the residual monitoring system 100 of the adhesive coating equipment, based on the joint analysis of air pressure and fluid dynamics parameters, realizes non-contact, real-time, and quantitative detection of the residual adhesive in the adhesive spraying syringe 10. The various modules have clear functional divisions and cooperate in a coordinated manner, and have the following technical characteristics: The glue spraying syringe 10 serves as the storage and output unit for the glue coating material and is the core component of the test object. Its structural parameters (such as volume and cross-sectional area) are used as the basic parameters for system calculation.

[0059] The pneumatic device 20, through the setting of a pressurizing unit 21 and a negative pressure unit 22, completes the inflation and deflation operations respectively, providing the necessary air pressure change conditions for the glue volume detection process. Specifically: the negative pressure unit 22 is used to extract the original air in the syringe before detection to ensure that the syringe is a closed negative pressure environment in the initial state; the pressurizing unit 21 is used to fill the glue spraying syringe 10 with compressed air and complete the volume calculation by measuring the flow rate and time.

[0060] The air pressure detection module 30 is used to collect the air pressure changes in the glue spraying syringe 10 and its tubing 60 in real time during the air extraction and inflation stages, as a trigger condition for glue quantity judgment (such as stopping inflation when the preset threshold is reached).

[0061] The flow rate and time monitoring module 40 collects the flow rate and corresponding time period of air entering the syringe through a flow meter or pressure sensor array. Combined with the air pressure status, it uses an integral formula to accurately estimate the volume of air injected. The glue volume detection module calculates the remaining glue volume based on the known total volume of the syringe, deducts the remaining space volume after inflation, and can compare it with the glue volume threshold for judgment.

[0062] Through the above structural design, this system can perform the following core functions: With sufficient adhesive, the system can operate continuously. If there is insufficient glue or no glue, the system can automatically issue an alarm signal to prompt replacement or replenishment; The entire process requires no disassembly or visual inspection of the syringe, enabling intelligent monitoring in a closed environment.

[0063] In one specific embodiment, the remaining amount monitoring system 100 further includes an alarm module connected to the glue quantity detection module, used to output an alarm signal when the remaining glue quantity in the glue spraying syringe 10 is detected to be lower than a preset glue quantity threshold.

[0064] In this embodiment, it should be noted that the alarm module, as the system's prompting and safety protection unit, has the main function of outputting an alarm signal in a timely manner when the remaining glue amount is lower than a preset threshold, based on the judgment result of the glue amount detection module, so as to remind the operator to replenish glue or replace the syringe, thereby avoiding discontinuous glue application or product quality problems caused by the depletion of glue.

[0065] Specifically, the alarm module can include audible and visual alarms, indicator lights, display screen prompts, and information push notifications from the host computer, and can be flexibly configured according to the needs of the on-site application. Its working logic is as follows: The adhesive quantity detection module calculates the current remaining adhesive quantity V0; If V0 < V th If the preset glue amount threshold is reached, an alarm trigger signal will be generated. Upon receiving the signal, the alarm module immediately activates the alarm device, such as by emitting a buzzer, illuminating an alarm indicator light, or displaying a warning message on the control interface.

[0066] In addition, to adapt to different operational needs, the alarm module can also have alarm level management functions, such as: When the remaining adhesive level is close to the threshold but has not yet fallen below it, a "warning" signal is output; When the remaining adhesive level is below the threshold, an "emergency alarm" signal is output.

[0067] Furthermore, the residual monitoring system 100 also includes a control module, which is connected to the pneumatic device 20 and the alarm module respectively, and is used to send a control signal to the pneumatic device 20 when an alarm signal is received. The control module includes a solenoid valve 50, which is used to control the glue spraying syringe 10 to connect to the negative pressure unit 22 or the pressurization unit 21 according to the control signal.

[0068] In this embodiment, it should be noted that the control module, as the logical decision-making and execution center of the system, can intelligently link the working status of the pneumatic equipment 20 after receiving the alarm signal output by the alarm module, thereby realizing the automated management and fault response control of the glue application process.

[0069] The core function of the control module is to implement the closed-loop monitoring process of "detection-judgment-response", as detailed below: Connection between the control module and the alarm module: When the glue quantity detection module determines that the remaining glue quantity in the glue spraying syringe 10 is lower than the preset threshold and outputs an alarm signal through the alarm module, the control module receives the signal and triggers subsequent actions.

[0070] The solenoid valve 50, as a control actuator, is integrated within the control module and switches states according to the received control signals, controlling the connection between the glue spray syringe 10 and the negative pressure unit 22 or pressurization unit 21 in the pneumatic device 20. Its specific control logic includes, but is not limited to: When the alarm is triggered, the control solenoid valve 50 disconnects the glue spraying syringe 10 from the negative pressure unit 22 to prevent continued air extraction or inflation operations, or disconnects the glue spraying syringe 10 from the pressurization unit 21 according to the system preset strategy to prevent continued glue dispensing. If the system is set to an automatic shutdown mode, it can also send a shutdown signal to the whole system to prevent dry glue from being sprayed dry or to prevent misoperation of the air circuit.

[0071] Enhanced Interoperability and Safety: By automatically switching the pneumatic execution path through the control module, not only can the response speed and control accuracy of the entire monitoring system be improved, but equipment damage or production line abnormalities caused by delayed manual response can also be effectively avoided.

[0072] System scalability: The control module can also be integrated with other control units (such as PLC, MCU, industrial PC, etc.) and can be extended with various execution logics through bus protocols or I / O interfaces, such as start / stop control, log recording, remote notification, etc., which facilitates multi-scenario deployment and secondary development.

[0073] The control module and solenoid valve 50 in this embodiment enable the margin monitoring system 100 provided by the present invention to not only have real-time detection and alarm capabilities, but also automatic response and intervention capabilities, demonstrating the advantages of a highly intelligent and automated system, and is especially suitable for production environments that require unattended operation or high integration.

[0074] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A method for monitoring the amount of adhesive remaining in a glue coating equipment, used to detect the amount of adhesive remaining in the glue spraying syringe of the glue coating equipment, characterized in that, include: S1. Extract the air from the glue spray syringe; S2. Inject air into the glue spraying syringe; S3. Detect the air pressure inside the glue spraying syringe. When the air pressure inside the glue spraying syringe reaches the preset air pressure threshold, stop the inflation. S4. Calculate the volume of remaining adhesive in the glue spray syringe based on the volume of air filled in, using the following formula: In the formula, The volume of the remaining adhesive in the adhesive spray syringe; The volume of the glue spray syringe; The volume of compressed air injected into the glue spray syringe after reaching a preset air pressure threshold.

2. The method for monitoring the remaining amount of adhesive in a coating equipment according to claim 1, characterized in that, S2 includes: filling the glue spraying syringe with air through a pressurizing unit; correspondingly, the volume of air filled into the glue spraying syringe in S4 is calculated as follows: In the formula, The volume of air that is filled into the glue spray syringe; This refers to the air pressure in the pre-inflation pressurization unit; This refers to the air pressure in the pressurization unit after inflation. Standard atmospheric pressure; 。 3. The method for monitoring the remaining amount of adhesive in a coating equipment according to claim 1, characterized in that, Following S4, the following is also included: S5. Determine whether the volume of the remaining adhesive in the glue spraying syringe is lower than the preset adhesive volume threshold. If so, output an alarm signal.

4. The method for monitoring the remaining amount of adhesive in the coating equipment according to claim 1, characterized in that, The glue volume threshold is defined as follows: the negative pressure suction force when the air is extracted from the glue spraying syringe is less than the weight of the remaining glue in the glue spraying syringe.

5. The method for monitoring the remaining amount of adhesive in the coating equipment according to claim 4, characterized in that, The formula for calculating the adhesive content threshold is as follows: In the formula, This is the threshold for adhesive content; The absolute value of the negative pressure used to extract air from the glue spray syringe; A is the cross-sectional area of ​​the glue spraying syringe; The density of the adhesive in the spray syringe; g is the acceleration due to gravity.

6. The method for monitoring the remaining amount of adhesive in a coating equipment according to claim 1, characterized in that, The interval between S1 and S2 also includes: S6. Detect the initial negative pressure value after aspiration; when the initial negative pressure value is less than the negative pressure threshold, determine that there is no glue in the syringe and output an alarm signal.

7. A residual monitoring system for an adhesive coating equipment, employing the residual monitoring method described in claims 1-6, characterized in that, include: Glue spray syringe; A pneumatic device is connected to the glue spraying syringe via a pipeline. The pneumatic device includes a pressurizing unit and a negative pressure unit. The pressurizing unit is used to provide compressed air to the glue spraying syringe to drive glue dispensing, and the negative pressure unit is used to evacuate the glue spraying syringe to create a negative pressure environment. An air pressure detection module is used to detect the air pressure of the glue spraying syringe and the tubing; A flow rate and time monitoring module is used to collect the air flow rate and duration during the process of the pressurization unit supplying compressed air to the glue spraying syringe; The adhesive quantity detection module is used to calculate the remaining volume of the adhesive spraying syringe based on the air pressure, flow rate and time parameters, and to determine the remaining adhesive quantity accordingly.

8. The residual monitoring system for the adhesive coating equipment according to claim 7, characterized in that, The margin monitoring system also includes: An alarm module, connected to the glue quantity detection module, is used to output an alarm signal when the remaining glue quantity in the glue spraying syringe is detected to be lower than a preset glue quantity threshold.

9. The residual monitoring system for the adhesive coating equipment as described in claim 8, characterized in that, The margin monitoring system also includes: The control module is connected to both the pneumatic device and the alarm module, and is used to send a control signal to the pneumatic device when the alarm signal is received.

10. The residual monitoring system for the adhesive coating equipment according to claim 9, characterized in that, The control module includes: A solenoid valve is used to control the glue spraying syringe to connect with the negative pressure unit or the pressurizing unit according to the control signal.

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