An edge banding system that monitors the conveying speed of an edge banding machine in real time to adjust the laser power

Abstract

The present invention provides an edge banding system that monitors the conveying speed of an edge banding machine in real time to adjust the laser power. The system includes an edge banding machine, a laser heating device, an edge banding machine conveyor belt, a thermal sensor, and a high-precision rotary encoder. It is characterized in that the system includes: a speed acquisition module: used to determine the real-time conveying speed of the edge banding machine conveyor belt in real time through the high-precision rotary encoder; a first calculation module: used to obtain the initial temperature at the real-time conveying speed of the edge banding machine conveyor belt through the thermal sensor, and obtain the initial power of the laser heating device, and calculate the conversion ratio between the initial temperature and the initial power; a second calculation module: used to calculate the required power of the laser heating device according to the conversion ratio when the real-time conveying speed changes; a power adjustment module: used to adjust the input power of the laser heating device in real time according to the difference between the required power and the initial power.

Description

Technical Field

[0001] The present invention relates to the technical field of laser edge sealing, and particularly relates to an edge sealing system that adjusts the laser power by real-time monitoring of the conveying speed of an edge sealer. Background Art

[0002] Currently, there are three processes in the field of edge sealing technology:

[0003] (1) The first is hot melt adhesive edge sealing, where the hot melt adhesive is heated and applied to the adhesive strip for bonding, but the hot melt time is long;

[0004] (2) The second is to use hot air or a square light spot to irradiate the adhesive layer pre-coated on the adhesive strip, reducing the hot melt time;

[0005] (3) The third is to use a swinging laser head to scan the edge sealing strip to melt it for edge sealing and bonding.

[0006] Due to various resistance factors, the conveying speed of the edge sealer will be fast or slow, resulting in inconsistent energy received by the edge sealing strip and affecting the edge sealing effect. Therefore, a method for speed feedback adjustment of the edge sealer is needed. By adjusting the speed, the laser power is adjusted to stably melt the edge sealing strip at a constant temperature. Summary of the Invention

[0007] The present invention provides an edge sealing system that adjusts the laser power by real-time monitoring of the conveying speed of an edge sealer, so as to solve the situation that due to various resistance factors, the conveying speed of the edge sealer is fast or slow, resulting in inconsistent energy received by the edge sealing strip and affecting the edge sealing effect.

[0008] The present invention proposes an edge sealing system that adjusts the laser power by real-time monitoring of the conveying speed of an edge sealer, including an edge sealer, a laser heating device, an edge sealer conveyor belt, a thermal sensor, and a high-precision rotary encoder. The system includes:

[0009] A speed acquisition module: used to determine the real-time conveying speed of the edge sealer conveyor belt in real time through a high-precision rotary encoder;

[0010] A first calculation module: used to obtain the initial temperature at the real-time conveying speed of the edge sealer conveyor belt through a thermal sensor, and obtain the initial power of the laser heating device, and calculate the conversion ratio of the initial temperature and the initial power;

[0011] A second calculation module: used to calculate the required power of the laser heating device according to the conversion ratio when the real-time conveying speed changes;

[0012] A power adjustment module: adjusts the input power of the laser heating device in real time according to the difference between the required power and the initial power.

[0013] As an embodiment of the present invention: The system further includes:

[0014] Rotation detection module: used to obtain the detection signal of the high-precision rotary encoder in real time, and determine the rotation information of the conveyor belt of the edge banding machine through the detection signal;

[0015] Speed calculation module: used to determine the rotation speed of the high-precision rotary encoder according to the rotation information and the speed calculation mode of the high-precision rotary encoder; where,

[0016] The speed calculation mode includes: acceleration calculation mode and conveyor running speed calculation mode;

[0017] The rotation speed includes: predicted conveyor speed and real-time monitoring speed;

[0018] According to the acceleration calculation mode, the predicted conveyor speed of the conveyor belt of the edge banding machine is transmitted in real time;

[0019] According to the running speed calculation mode, the real-time monitoring speed of the conveyor belt of the edge banding machine is transmitted in real time;

[0020] Speed verification module: used to interactively verify the speed of the conveyor belt of the edge banding machine according to the predicted conveyor speed and the real-time monitored conveyor speed, and output the real-time conveyor speed of the conveyor belt of the edge banding machine when the verification is successful.

[0021] As an embodiment of the present invention: the system further includes:

[0022] Timing module: used to perform real-time timing when the high-precision rotary encoder detects speed information, and calculate the continuous running time of the same speed when the speed information changes;

[0023] Thread setting module: used to set a corresponding speed calculation thread for each type of speed information; where,

[0024] Each speed calculation thread calculates the same speed information;

[0025] Data segmentation module: used to segment different speed information and the corresponding speed continuous running time according to the speed information detected by the high-precision rotary encoder, and store the data for the corresponding time period when different speed information is detected.

[0026] As an embodiment of the present invention: the system further includes:

[0027] Voltage acquisition module, used to obtain the input current within the current PWM period from the voltage acquisition circuit of the laser heating device, and obtain the required reference voltage vector according to the input current;

[0028] Input acquisition module: used to obtain the bus voltage within the current PWM period from the power supply bus acquisition circuit of the laser heating device;

[0029] Time calculation module: used to obtain the duration of the reference voltage vector according to the reference voltage vector;

[0030] Initial power calculation module: used to calculate the initial power of the laser heating device according to the bus current and bus voltage; where,

[0031] The initial power is the previous power of the real-time power of the current laser heating device.

[0032] As an embodiment of the present invention: The system further includes:

[0033] Temperature sensing configuration module: used to set the environmental information of the edge banding strip in real time; where,

[0034] The environmental information includes: environmental temperature and environmental humidity;

[0035] Temperature recording module: used to record the induced temperature during the period from the start of heating of the edge banding strip to the softened edge banding state at the real-time power of the laser heating device, and generate a time-temperature curve;

[0036] Energy calculation module: used to calculate the absorbed energy Q, the conducted energy Qc, and the self-stored energy Qh of the edge banding strip during the phase change period according to the time-temperature curve and the heating power P;

[0037] Heat capacity calculation module: measure the heat capacity H of the edge banding strip, and the heat capacity H = Q - Qc - Qh;

[0038] Interval setting unit: used to set the input power interval of the laser heating device according to the heat capacity.

[0039] As an embodiment of the present invention: The system further includes:

[0040] Temperature acquisition and obtaining module: obtain the real-time temperature and the real-time required temperature of the edge banding strip; where,

[0041] The real-time required temperature is determined according to the real-time conveying speed of the conveyor belt of the edge banding machine;

[0042] Reference setting module: used to construct a real-time temperature curve according to the real-time temperature, and set the temperature reference line of the real-time temperature curve and the real-time required temperature;

[0043] Interval setting module: used to determine the temperature interval of the edge banding strip according to the input power interval of the laser heating device and the distance between the laser heating device and the edge banding strip;

[0044] Early warning determination module: used to set the early warning temperature of the edge banding strip according to the temperature reference curve and the temperature interval.

[0045] As an embodiment of the present invention: The system further includes:

[0046] A signal detection unit: for real-time acquisition of the signal period of a high-precision rotary encoder;

[0047] A mode setting unit: for entering the inertia recognition mode when the number of valid signal periods obtained within the preset conveying speed of the edge banding machine is greater than the preset number of periods;

[0048] An automatic adjustment unit: for adaptively adjusting the step size of the rotary encoder based on the number of valid signal periods obtained from the speed value of each conveyor belt of the edge banding machine in the inertia recognition mode.

[0049] As an embodiment of the present invention: The system further includes:

[0050] A signal acquisition module: for acquiring the stable rotation speed of the high-precision rotary encoder during the supervision of the conveyor belt speed of the edge banding machine, and obtaining the speed feedback signal;

[0051] An error elimination module: for fitting the data of the speed feedback signal through Fourier transform and eliminating the non-encoder precision error characteristic frequencies;

[0052] An error calculation module: for using an error calculation model to obtain the speed error caused by the precision of the rotary encoder;

[0053] A compensation module: for converting the speed error caused by the high-precision rotary encoder into a speed compensation value caused by the precision of the rotary encoder through unit conversion, and performing compensation calculation on the real-time output speed value.

[0054] As an embodiment of the present invention: A thermal imaging device is further provided on the laser heating device; wherein,

[0055] The thermal imaging device includes:

[0056] A thermal detector device, the thermal detector device includes a thermal sensing pixel array;

[0057] A signal processing circuit, the signal processing circuit is operably coupled to the thermal detector device;

[0058] An image generator: for receiving the thermal sensing signal processed by the signal processing circuit and generating a real-time thermal map of the edge banding strip on the conveyor belt of the edge banding machine.

[0059] As an embodiment of the present invention: The system further includes:

[0060] A sample setting module: for pre-setting the edge banding strip samples for training the target detection network;

[0061] Labeling module: used to perform coordinate labeling at different three-dimensional coordinates in the training samples of edge banding strips. Among them,

[0062] the labeling information includes the three-dimensional coordinate information, size information, and orientation information of the edge banding strip;

[0063] Thermogram generation module: used to input the temperatures of different regions of each edge banding strip into the thermogram according to the three-dimensional coordinate information, size information, and orientation information.

[0064] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification and the accompanying drawings.

[0065] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0066] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings:

[0067] Figure 1 is a system composition diagram of an edge banding system for real-time monitoring of the conveying speed of an edge banding machine to adjust the laser power in an embodiment of the present invention;

[0068] Figure 2 is a schematic diagram of automatic adjustment and thermal labeling of the system in an embodiment of the present invention;

[0069] Figure 3 is a composition diagram of a thermal imaging device in an embodiment of the present invention. Detailed Embodiments

[0070] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0071] The present invention provides an edge banding system for real-time monitoring of the conveying speed of an edge banding machine to adjust the laser power, including an edge banding machine, a laser heating device, an edge banding machine conveyor belt, a thermal sensor, and a high-precision rotary encoder. The system includes:

[0072] Speed acquisition module: used to determine the real-time conveying speed of the edge banding machine conveyor belt in real time through a high-precision rotary encoder;

[0073] The speed acquisition module is connected to the transmission mechanism of the conveyor belt of the edge banding machine through a high-precision rotary encoder. There are gears and motors in the transmission mechanism, and the present invention is mainly connected to the gears. Thus, the transmission speed is calculated to determine the actual transmission speed.

[0074] The first calculation module: It is used to obtain the initial temperature under the real-time transmission speed of the conveyor belt of the edge banding machine through a thermal sensor, and obtain the initial power of the laser heating device, and calculate the conversion ratio between the initial temperature and the initial power.

[0075] In the present invention, the first calculation module is composed of a thermal sensor under the conveyor belt of the edge banding machine and a microprocessing device. The microprocessing device has a calculation function. It will calculate the time through the internal clock chip, and will determine with the laser heating device the initial power at the initial heating. The conversion ratio of the initial power is to judge the amount of heat generated under the initial power, the conversion relationship between power and temperature, and generate the corresponding conversion relationship formula, that is, the corresponding conversion ratio. This conversion relationship formula is only based on the conversion of speed change and then power change. Through the variable of speed, the two variables of the heating time and heating temperature of the edge banding strip and the heat dissipation of the edge banding strip can be ignored, corresponding to the change of power.

[0076] The second calculation module: It is used to calculate the required power of the laser heating device according to the conversion ratio when the real-time transmission speed changes.

[0077] When the real-time transmission speed changes, the heating time of the encapsulation strip changes and becomes shorter. Secondly, due to the speed change, the heat dissipation speed of the encapsulation strip increases. At this time, according to the calculation of the conversion ratio brought by the high-precision rotary encoder, it can be judged that under the existing speed, the laser heating device needs to reach the same heating effect, and the operating power required by the laser heating device.

[0078] The power adjustment module: It adjusts the input power of the laser heating device in real time according to the difference between the required power and the initial power.

[0079] The working principle of the above technical solution is as follows: As shown in the appendix Figure 1As shown in the figure, the present invention forms the entire edge banding equipment through an edge banding machine, a laser heating device, an edge banding machine conveyor belt, a thermal sensor, and a high-precision rotary encoder. The high-precision rotary encoder is used to encode the edge banding machine conveyor belt of the edge banding equipment. During the entire encoding process, by calculating the speed of the conveyor belt, the heat of the edge banding strip is judged under different speeds, so as to judge whether the temperature of the edge banding strip reaches the level of melting the edge banding strip, and the conversion ratio of the initial temperature and initial power of the edge banding strip can be calculated. Furthermore, according to the power information, the interpolation for power adjustment is judged to realize the power adjustment of the laser heating device. The present invention installs a high-precision rotary encoder on the edge banding machine conveyor belt to collect the speed in real time, feedback the speed to the system, and the system adjusts the laser power in real time according to the speed, so that the edge banding strip obtains a constant energy.

[0080] The beneficial effects of the above technical solutions are as follows:

[0081] (1) The edge banding system of the present invention is equipped with a high-precision rotary encoder, so that: "the heating time of the edge banding strip, the heating temperature of the edge banding strip, and the heat dissipation of the edge banding strip are all converted into a single parameter of the speed of the edge banding strip", and unified temperature adjustment is realized through this parameter; the basis for the realization of the present invention is the high-precision rotary encoder. If it is a general speed acquisition device, although the speed can also be detected, there is a large error in the specific implementation; therefore, the unified system of the high-precision rotary encoder and the laser power adjustment device is the basis for realizing the constant temperature of the edge banding strip.

[0082] Furthermore, through the constant temperature calculation of the temperature of the edge banding strip at different speeds on the edge banding machine, the real-time temperature of the edge banding strip is adjusted, the temperature of the edge banding strip is controlled to reach a constant heat temperature, and the edge banding strip is controlled to have a constant melting efficiency.

[0083] As an embodiment of the present invention: the system further includes:

[0084] A rotation detection module: used to obtain the detection signal of the high-precision rotary encoder in real time, and determine the rotation information of the edge banding machine conveyor belt through the detection signal;

[0085] A speed calculation module: used to determine the rotation speed of the high-precision rotary encoder according to the rotation information and the speed calculation mode of the high-precision rotary encoder; wherein,

[0086] The speed calculation mode includes: an acceleration calculation mode and a conveyor running speed calculation mode;

[0087] The rotation speed includes: a predicted conveyor speed and a real-time monitored speed;

[0088] According to the acceleration calculation mode, the predicted conveyor speed of the edge banding machine conveyor belt is transmitted in real time;

[0089] Calculate the real-time monitored speed of the edge banding machine conveyor belt according to the running speed calculation mode;

[0090] Speed verification module: used to interactively verify the speed of the edge banding machine conveyor belt according to the predicted conveyor speed and the real-time monitored conveyor speed, and output the real-time conveyor speed of the edge banding machine conveyor belt when the verification is successful.

[0091] The working principle of the above technical solution is as follows: The present invention can determine the speed information of the edge banding machine conveyor belt through a high-precision rotary encoder, calculate the rotational speed, and output the real-time running speed of the edge banding machine conveyor belt through speed monitoring. The detection signal of the present invention is the encoded signal of the number of rotation cycles, so as to determine the real-time speed of the conveyor belt. When calculating the speed, through the change of the rotational speed per cycle and the time change per cycle, the acceleration and the real-time running speed can be calculated, and thus the speed prediction can be realized. The predicted speed and the real-time speed are interactively verified, and the unity of speed change monitoring can also be realized, ensuring the correctness of speed calculation.

[0092] The beneficial effect of the present invention is that it can achieve high-precision speed calculation, and ensure the accuracy of speed prediction and monitoring by a high-precision encoder through an interactive verification method.

[0093] As an embodiment of the present invention: The system further includes:

[0094] Timing module: used to perform real-time timing when the high-precision rotary encoder detects speed information, and calculate the continuous running time of the same speed when the speed information changes;

[0095] The timing module is used for acceleration calculation and continuous monitoring of non-changing speeds.

[0096] Thread setting module: used to set a corresponding speed calculation thread for each type of speed information; wherein,

[0097] Each speed calculation thread calculates the same speed information;

[0098] The function of the speed calculation thread is to separately process the speed. For example, when the speeds are 1000 meters per hour and 1200 meters per hour, each speed corresponds to a statistical thread, so that the system can respond more quickly and realize the control of the laser heating device.

[0099] Data segmentation module: used to segment different speed information and the corresponding speed continuous running time according to the speed information detected by the high-precision rotary encoder, and store the data for the corresponding time period when different speed information is detected.

[0100] The essence of data segmentation is the segmentation of speed calculation threads, which is convenient for recording speed data.

[0101] The working principle of the above technical solution is as follows: The present invention can generate a speed calculation process for each speed information according to the speed change information of a high-precision rotary encoder within a period of time and the continuous running time, and then perform data storage at different speeds through data segmentation at different speeds.

[0102] The beneficial effects of the above technical solution are as follows:

[0103] The present invention can achieve data storage in different time periods, thereby realizing real-time temperature calculation of the same speed in a single process and ensuring the stability of the temperature.

[0104] As an embodiment of the present invention: The system further includes:

[0105] A voltage acquisition module, configured to obtain the input current within the current PWM period from the voltage acquisition circuit of the laser heating device, and obtain the required reference voltage vector according to the input current;

[0106] An input acquisition module: configured to obtain the bus voltage within the current PWM period from the power supply bus acquisition circuit of the laser heating device;

[0107] A time calculation module: configured to obtain the duration of the reference voltage vector according to the reference voltage vector;

[0108] An initial power calculation module: configured to calculate the initial power of the laser heating device according to the bus current and the bus voltage; wherein,

[0109] The initial power is the previous power of the real-time power of the current laser heating device.

[0110] The working principle of the above technical solution is as follows: The present invention can calculate the power of the laser heating device through the voltage vector and the PWM signal. Through the calculation of the power, it is possible to prevent the laser heating device from being in a state of abnormal voltage. The voltage acquisition circuit of the present invention is used to collect data such as the operating voltage and input voltage of the laser heating device, so as to realize the rapid calculation of the power of the laser heating device. Determining the control method of the voltage vector can achieve rapid frequency compensation. Furthermore, the bus voltage can be rapidly adjusted and detected, and then the initial power and real-time power of the laser heating device can be determined, and rapid power adjustment can also be realized.

[0111] The beneficial effects of the above technical solution are as follows: The present invention can achieve power detection of the laser heating device and can also achieve rapid adjustment of its power.

[0112] As an embodiment of the present invention: The system further includes:

[0113] A temperature sensing configuration module: configured to set the environmental information of the edge banding strip in real time; wherein,

[0114] The environmental information includes: environmental temperature and environmental humidity;

[0115] Temperature recording module: used to record the induced temperature during the period from the start of heating the edge banding strip to reaching the softened edge banding state at the real-time power of the laser heating device, and generate a time-temperature curve;

[0116] Energy calculation module: used to calculate the absorbed energy Q, conducted energy Qc, and self-stored energy Qh of the edge banding strip during the phase change period according to the time-temperature curve and heating power P;

[0117] Heat capacity calculation module: measures the heat capacity H of the edge banding strip, where the heat capacity H = Q - Qc - Qh;

[0118] Interval setting unit: used to set the input power interval of the laser heating device according to the heat capacity.

[0119] The working principle of the above technical solution is as follows: The above solution refers to a calculation method of heat capacity. In the present invention, when reflecting the softened state of the edge banding strip, numerical calculation is carried out. The present invention combines it with the environmental information of the edge banding strip in the present invention, which is more convenient for numerical reflection when determining the heat melting state of the edge banding strip, facilitating the supervision of the softened state of the edge banding strip and ensuring the effect of laser hot melting.

[0120] The present invention can calculate the induced temperature of the edge banding during a period of time through the softened state of the edge banding strip and the environmental information, calculate all the heat capacities of the edge banding strip during the heating stage, and calculate the input power interval of the laser heating device through the heat capacity.

[0121] As an embodiment of the present invention: The system further includes:

[0122] Temperature acquisition module: acquires the real-time temperature and real-time required temperature of the edge banding strip; wherein,

[0123] The real-time required temperature is determined according to the real-time conveying speed of the conveyor belt of the edge banding machine;

[0124] Reference setting module: used to construct a real-time temperature curve according to the real-time temperature, and set the temperature reference line of the real-time temperature curve and the real-time required temperature;

[0125] Interval setting module: used to determine the temperature interval of the edge banding strip according to the input power interval of the laser heating device and the distance between the laser heating device and the edge banding strip;

[0126] Early warning determination module: used to set the early warning temperature of the edge banding strip according to the temperature reference curve and the temperature interval.

[0127] The working principle of the above technical solution is as follows: The present invention can calculate the real-time temperature and the real-time required temperature of the edge banding strip to determine the temperature curve of the real-time temperature, set a temperature reference line through the temperature curve, and then calculate the temperature range of the real-time temperature of the edge banding strip. The warning temperature of the edge banding strip is set through the temperature range. The real-time temperature of the temperature acquisition and obtaining module is determined by a temperature detection device. However, the real-time required temperature is determined by the conversion ratio of the speed of a high-precision encoder and the power of a laser heating device. The temperature that can be reached by the required power of the laser heating device is used to determine the required temperature through the difference between the temperature that can be reached and the real-time temperature, and then a temperature curve is constructed. Through the temperature curve, the hot melt range of the edge banding strip is determined, and then the warning temperature of the edge banding strip is specified. The warning temperature includes low-temperature warning and high-temperature warning. If the temperature is too high, it will also cause the edge banding strip to melt too much, making it difficult to perform encapsulation.

[0128] The beneficial effect of the above technical solution is as follows: The present invention can realize the real-time warning of the melting temperature of the edge banding strip and determine the warning temperature of the melting of the edge banding strip.

[0129] As an embodiment of the present invention: The system further includes:

[0130] A signal detection unit: used to obtain the signal period of the high-precision rotary encoder in real time;

[0131] A mode setting unit: used to enter the inertia recognition mode when the number of valid signal periods obtained within the preset conveying speed of the edge banding machine is greater than the preset number of periods;

[0132] An automatic adjustment unit: used in the inertia recognition mode to adaptively adjust the step size of the rotary encoder based on the number of valid signal periods obtained from the speed value of each edge banding machine conveyor belt.

[0133] The working principle of the above technical solution is as follows: The above technical solution also introduces an inertia recognition mode. The function of the inertia recognition mode is that it can optimize the step size of the high-precision rotary encoder, that is, the counting, through the valid signal of the conveying speed of the edge banding machine, that is, the normal working data, to prevent error calculation caused by the conveyor belt failure while the gear is still rotating.

[0134] The present invention can effectively identify the inertia of the edge banding machine conveyor belt through the valid signal within the signal period of the high-precision rotary encoder, and calculate the step size of the high-precision rotary encoder through the inertia recognition method.

[0135] As an embodiment of the present invention: The system further includes:

[0136] A signal acquisition module: used to obtain the stable rotation speed of the high-precision rotary encoder during the supervision of the edge banding machine conveyor belt speed, and obtain the speed feedback signal;

[0137] Error rejection module: used to fit the data of the speed feedback signal through Fourier transform and reject the characteristic frequency of the non-encoder accuracy error;

[0138] Error calculation module: used to obtain the speed error caused by the rotation encoder accuracy in combination with the error calculation model;

[0139] Compensation module: used to convert the speed error caused by the high-precision rotary encoder into a speed compensation value caused by the rotary encoder accuracy through unit conversion and perform compensation calculation on the real-time output speed value.

[0140] The working principle of the above technical solution is as follows:

[0141] The above technical solution also introduces a speed compensation mechanism based on error rejection. The speed feedback signal is the feedback signal of the expected speed and the actual speed, and thus the rejection of errors can be realized, and then the speed error can be determined to achieve speed compensation.

[0142] That is, through the stable speed supervision of the high-precision rotary encoder, the speed information of the edge banding machine can be fitted in real time, and the temperature error characteristics of the high-precision rotary encoder can be determined, so as to realize the compensation calculation of temperature.

[0143] The beneficial effect of the above technical solution is that the present invention can convert the speed supervision into the real-time supervision of the temperature stable state, judge the temperature error method, and perform error compensation calculation on the temperature.

[0144] As an embodiment of the present invention: a thermal imaging device is further provided on the laser heating device; wherein,

[0145] The thermal imaging device includes:

[0146] A thermal detector device, and the thermal detector device includes a thermal sensing pixel array;

[0147] A signal processing circuit, and the signal processing circuit is operably coupled to the thermal detector device;

[0148] An image generator, used to receive the thermal signal processed by the signal processing circuit and generate a real-time thermal map of the edge banding strip on the conveyor belt of the edge banding machine.

[0149] The working principle of the above technical solution is as follows:

[0150] The above technical solution also sets a thermal imaging device. The thermal imaging device can display the real-time temperature of the edge banding strip thermally and also generate a real-time thermal map of the overall conveyor belt, thereby realizing the thermal supervision of the edge banding strip.

[0151] That is, a thermal imaging device can be used to convert the monitored edge banding into a real-time thermal map. Through a coupling method, temperature data is input into the thermal detector device in real time to generate a thermal signal that senses temperature.

[0152] The beneficial effects of the above technical solution are as follows: The present invention can perform real-time temperature monitoring on the edge banding through a thermal map.

[0153] As an embodiment of the present invention: The system further includes:

[0154] A sample setting module: used to preset the edge banding samples for training the object detection network;

[0155] A labeling module: used to label the coordinates at different three-dimensional coordinates in the edge banding sample training samples, where

[0156] The labeling information includes the three-dimensional coordinate information, size information, and orientation information of the edge banding;

[0157] A thermal map generation module: used to input the temperatures of different regions of each edge banding into the thermal map according to the three-dimensional coordinate information, size information, and orientation information.

[0158] The working principle of the above technical solution is as follows:

[0159] The above technical solution also introduces an object detection network. The role of the object detection network is to identify the edge banding on the conveyor belt. Then, in combination with the thermal map, if the placement of the edge banding is inaccurate, it may cause uneven heating, or when the real-time heat absorption of the edge banding is uneven, it can mark the places where the temperature of the edge banding is uneven.

[0160] That is, through the object detection network, three-dimensional annotation information of the edge banding can be generated, the edge banding can be three-dimensionally annotated, and then a thermal map can be generated to display the real-time temperature of different blocks of the edge banding.

[0161] The beneficial effects of the above technical solution are as follows: Through the above method, it can be judged whether the temperature of the edge banding is balanced and whether the edge banding is evenly melted for edge sealing as a whole.

[0162] When the present invention performs temperature unevenness annotation through a thermal map, it further includes the following process:

[0163] Step 1: Obtain a thermal map and construct a temperature determination model for any pixel point of the thermal map:

[0164]

[0165] Among them: Q(i) represents the temperature determination model of the i-th pixel point of the thermal map; w i represents the position coordinate of the i-th pixel point in the thermal map; Yi represents the color depth of the \(i\)-th pixel in the heat map; \(F\) j represents the color depth distribution characteristics of different pixels on the \(j\)-th edge strip in the heat map; \(S\) j represents the distribution range of the \(j\)-th edge strip on the heat map; \(P(Y\) i |G j ) represents whether the color depth of the \(i\)-th pixel in the heat map conforms to the determination value of the color depth interval on the \(j\)-th edge strip; \(m\) represents the total number of edge strips on the heat map; \(n\) represents the total number of pixels on the heat map; \(i\in n\); \(j\in m\); both are positive integers; when \(H\) is the minimum color depth, if \(Q(i)\lt0\), it indicates non-uniform temperature, and if \(Q(i)\gt0\), it indicates uniform temperature; \(H\) represents the reference color depth (it has two values, including the minimum color depth of the color depth, that is, the minimum temperature value, because too high temperature will cause the edge strip to deform, and it can be directly judged through the image.)

[0166] Step 2: Through the fusion of the temperature determination model and the standard determination, perform non-uniform temperature annotation:

[0167]

[0168] where \(D\) j , i represents the probability value that the \(i\)-th pixel in the heat map belongs to the \(j\)-th edge strip (the probability value may be 0); \(L\) ji represents the distance between the \(i\)-th pixel in the heat map and the \(j\)-th edge strip; \(K\) represents the distribution characteristics of the edge strip; represents the annotation function for the temperature determination of the \(i\)-th pixel in the heat map belonging to the \(j\)-th edge strip; because \(Q\) determines whether the temperature is uniform, determines the pixels that need to be annotated;

[0169] Perform the specific annotation of non-uniform temperature through Step 2.

[0170] In the above method, Step 1 can judge whether the temperature value of each pixel meets the required temperature. Step 2 can judge on which specific edge strip each pixel is after temperature judgment, determine the corresponding position, and thus perform temperature annotation on the specific pixel.

[0171] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications therein.

Claims

1. An edge banding system that adjusts the laser power by real-time monitoring of the conveying speed of an edge banding machine, comprising an edge banding machine, a laser heating device, an edge banding machine conveyor belt, a thermal sensor, and a high-precision rotary encoder, characterized in that, The system includes: A speed acquisition module: used to determine the real-time transmission speed of the edge banding machine conveyor belt in real time through a high-precision rotary encoder; A first calculation module: used to obtain the initial temperature at the real-time transmission speed of the edge banding machine conveyor belt through a thermal sensor, and obtain the initial power of the laser heating device, and calculate the conversion ratio of the initial temperature and the initial power; A second calculation module: used to calculate the required power of the laser heating device according to the conversion ratio when the real-time transmission speed changes; A power adjustment module: used to adjust the input power of the laser heating device in real time according to the difference between the required power and the initial power; Wherein, the system further includes: A sample setting module: used to preset the edge banding samples for training the target detection network; A labeling module: used to perform coordinate labeling at different three-dimensional coordinates in the edge banding sample training samples, wherein, The labeling information includes the three-dimensional coordinate information, size information, and orientation information of the edge banding; A heat map generation module: used to input the temperatures of different regions of each edge banding into the heat map according to the three-dimensional coordinate information, size information, and orientation information; Wherein, through the target detection network, the three-dimensional labeling information of the edge banding is generated, the edge banding is three-dimensionally labeled, and then the heat map can be generated to display the real-time temperature of different blocks of the edge banding The temperature non-uniformity labeling through the heat map further includes the following process: Step 1: Obtain the heat map and construct a temperature determination model for any pixel point of the heat map: Wherein: represents the temperature determination model of the th pixel point of the heat map; represents the position coordinates of the th pixel point in the heat map; represents the color depth of the th pixel point in the heat map; represents the color depth distribution feature of different pixel points on the th edge strip in the heat map; represents the distribution range of the th edge strip on the heat map; represents whether the color depth of the th pixel point in the heat map conforms to the determination value of the color depth interval on the th edge strip; represents the total number of edge strips on the heat map; represents the total number of pixel points on the heat map; ; ; all are positive integers; When it is the minimum color depth, when , it indicates non-uniform temperature, when , it indicates uniform temperature; represents the reference color depth; Step 2: Perform temperature non-uniformity labeling through the fusion of the temperature determination model and the standard determination: Among them, represents the probability value (the probability value may be 0) that the th pixel point in the heat map belongs to the th edge strip; represents the distance between the th pixel point in the heat map and the th edge strip; represents the distribution characteristics of the edge strip; represents the labeling function for determining the temperature of the th pixel point in the heat map belonging to the th edge strip; because determines whether the temperature is uniform, determines the pixel points that need to be labeled; The specific labeling of temperature non-uniformity is realized through Step 2; The system further includes: A timing module: used to perform real-time timing when the speed information is detected by the high-precision rotary encoder, and calculate the continuous running time at the same speed when the speed information changes; A thread setting module: used to set the corresponding speed calculation thread for each speed information; wherein, Each speed calculation thread calculates the same speed information; A data segmentation module: used to segment different speed information and the corresponding speed continuous running time according to the speed information detected by the high-precision rotary encoder, and store the data in the corresponding time period when different speed information is detected.

2. The edge banding system for adjusting the laser power by real-time monitoring of the conveying speed of the edge banding machine according to claim 1, wherein, The system further includes: A rotation detection module: used to obtain the detection signal of the high-precision rotary encoder in real time, and determine the rotation information of the edge banding machine conveyor belt through the detection signal; A speed calculation module: used to determine the rotation speed of the high-precision rotary encoder according to the rotation information and the speed calculation mode of the high-precision rotary encoder; wherein, The speed calculation mode includes: an acceleration calculation mode and a transmission running speed calculation mode; The rotation speed includes: a predicted transmission speed and a real-time monitoring speed; According to the acceleration calculation mode, the predicted transmission speed of the edge banding machine conveyor belt is transmitted in real time; According to the running speed calculation mode, the real-time monitoring speed of the edge banding machine conveyor belt is transmitted in real time; A speed verification module: used to perform interactive verification on the speed of the edge banding machine conveyor belt according to the predicted transmission speed and the real-time monitored transmission speed, and output the real-time transmission speed of the edge banding machine conveyor belt when the verification is successful.

3. A edge banding system that adjusts the laser power by real-time monitoring the conveying speed of an edge banding machine, characterized in that, The system further includes: The voltage acquisition module is used to obtain the input current within the current PWM cycle from the voltage acquisition circuit of the laser heating device, and obtain the required reference voltage vector according to the input current; The input acquisition module: is used to obtain the bus voltage within the current PWM cycle from the power supply bus acquisition circuit of the laser heating device; The time calculation module: is used to obtain the duration of the reference voltage vector according to the reference voltage vector; The initial power calculation module: is used to calculate the initial power of the laser heating device according to the bus current and the bus voltage; where, The initial power is the previous power of the real-time power of the current laser heating device.

4. A edge banding system for adjusting laser power by real-time monitoring of the conveying speed of an edge banding machine, characterized in that, The system further includes: The temperature sensing configuration module: is used to set the environmental information of the edge banding strip in real time; where, The environmental information includes: environmental temperature and environmental humidity; The temperature recording module: is used to record the sensed temperature during the period from the start of heating of the edge banding strip to the softened edge banding state at the real-time power of the laser heating device, and generate a time-temperature curve; The energy calculation module: is used to calculate the absorbed energy Q, the conducted energy Qc, and the self-stored energy Qh of the edge banding strip during the phase change period according to the time-temperature curve and the heating power P; The heat capacity calculation module: measures the heat capacity H of the edge banding strip, and the heat capacity H = Q - Qc - Qh; The interval setting unit: is used to set the input power interval of the laser heating device according to the heat capacity.

5. A edge banding system for adjusting laser power by real-time monitoring of the conveying speed of an edge banding machine, characterized in that, The system further includes: The temperature acquisition and obtaining module: obtains the real-time temperature and the real-time required temperature of the edge banding strip; where, The real-time required temperature is determined according to the real-time conveying speed of the edge banding machine conveyor belt; The reference setting module: is used to construct a real-time temperature curve according to the real-time temperature, and set the temperature reference lines of the real-time temperature curve and the real-time required temperature; The interval setting module: is used to determine the temperature interval of the edge banding strip according to the input power interval of the laser heating device and the distance between the laser heating device and the edge banding strip; The warning determination module: is used to set the warning temperature of the edge banding strip according to the temperature reference curve and the temperature interval.

6. A edge banding system for adjusting the laser power by real-time monitoring the conveying speed of an edge banding machine, characterized in that, The system further includes: The signal detection unit: is used to obtain the signal period of the high-precision rotary encoder in real time; The mode setting unit: is used to enter the inertia recognition mode when the number of valid signal periods obtained within the preset edge banding machine conveying speed is greater than the preset number of periods; The automatic adjustment unit: is used to adaptively adjust the step size of the high-precision rotary encoder based on the number of valid signal periods obtained from the speed value of each edge banding machine conveyor belt in the inertia recognition mode.

7. A edge banding system that adjusts the laser power by real-time monitoring of the conveying speed of an edge banding machine, characterized in that, The system further includes: The signal acquisition module: is used to obtain the stable rotation speed of the high-precision rotary encoder when supervising the speed of the edge banding machine conveyor belt, and obtain the speed feedback signal; The error elimination module: is used to fit the data of the speed feedback signal through Fourier transform, and eliminate its non-encoder precision error characteristic frequencies; The error calculation module: is used to use the error calculation model to obtain the speed error caused by the precision of the rotary encoder; The compensation module: is used to convert the speed error caused by the high-precision rotary encoder into a speed compensation value caused by the precision of the rotary encoder through unit conversion, and perform compensation calculation on the real-time output speed value.

8. A edge banding system for adjusting laser power by real-time monitoring of the conveying speed of an edge banding machine, characterized in that, A thermal imaging device is further provided on the laser heating device; wherein, The thermal imaging device includes: A thermal detector device, and the thermal detector device includes a thermal sensing pixel array; A signal processing circuit, and the signal processing circuit is used to be coupled to the thermal detector device; An image generator, which is used to receive the thermal sensing signal processed by the signal processing circuit and generate a real-time thermal map of the edge band on the conveyor belt of the edge banding machine.

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