Material transport and carrier tray return system

Abstract

The present application relates to material transportation and tray backflow system, comprising: at least two adjacent material transportation lines, and tray backflow detection system arranged between the two material transportation lines;The tray backflow detection system comprises: tray backflow line, the tray backflow line is used to convey tray along the first conveying direction, the first conveying direction is opposite to the second conveying direction in the material transportation line, for forming a "processing-backflow-reprocessing" material circulation path according to the reverse operation of the tray backflow line and the material transportation line, so that the material conveying line and the tray backflow line are integrated in the same production line, so as to realize the rapid transfer of materials in different directions without increasing the area of the site.And through at least two adjacent material transportation lines and the connecting motor connecting the two material transportation lines, the material transportation and tray backflow system provides a redundancy mode, further improves the overall reliability and stability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic material conveying, and in particular to a material conveying and tray backflow system. BACKGROUND

[0002] Most of the conveying devices on the market are single-side equipment operations. If a change is needed, the line needs to be stopped and debugged, which affects the effective use time. The conveying device with multi-side transmission has a single application scene and is difficult to cope with complex transportation conditions.

[0003] A material conveying system, a conveying device and an automatic production line are disclosed in Chinese Patent CN119117577A; comprising: a first line changing assembly, a second line changing assembly and a plurality of material conveying lines, one end of the material conveying line is connected to the first line changing assembly, the other end is connected to the second line changing assembly; the first line changing assembly, the second line changing assembly cooperate with the plurality of material conveying lines to form a series line transmission state and a parallel line transmission state.

[0004] Although the above-mentioned scheme solves the problems of the need for type change, line stop and debugging and the single application scene of multi-side transmission of the existing conveying device to a certain extent through the cooperation of the first line changing assembly, the second line changing assembly and the plurality of material conveying lines; however, due to the lack of real-time detection means for the material conveying and carrier backflow process in the first line changing assembly and the second line changing assembly, the conversion between the series line transmission state and the parallel line transmission state mainly depends on the preset program to switch the transmission mode; however, in the actual production process, when the tray on a certain material conveying line or carrier backflow line is suddenly congested due to some reason, there is no corresponding sensor or detection device in the system that can timely sense this abnormal situation, which causes the system to be unable to timely understand whether the carrier backflow is affected, and further causes a chain reaction on the overall material conveying efficiency.

[0005] Therefore, we propose a material conveying and tray backflow system. SUMMARY

[0006] The main purpose of the present application is to provide a material conveying and tray backflow system, which aims to solve the problem that in the prior art, when a sudden congestion occurs, the system still switches according to a fixed period, causing more trays to be guided to the already congested line, thereby further exacerbating the congestion.

[0007] To achieve the above object, the application provides a material transportation and tray backflow system, which comprises at least two adjacent material transportation lines and a tray backflow detection system arranged between the two material transportation lines; the tray backflow detection system comprises a tray backflow line, which is used to convey the tray in a first conveying direction opposite to a second conveying direction in the material transportation line, so as to form a "processing-backflow-reprocessing" material circulation path according to the reverse operation of the tray backflow line and the material transportation line.

[0008] One end of the tray backflow line is provided with a first connecting motor, which is close to a material inlet end of the material transportation line; the other opposite end of the tray backflow line is provided with a second connecting motor, which is away from the material inlet end of the material transportation line; the first connecting motor and the second connecting motor are both provided with a sensor array, which is used to detect the position and state information of the tray and accurately control the transfer process of the tray based on the detected information.

[0009] The sensor array comprises a pair of photoelectric sensors, a reflective photoelectric sensor and a slot photoelectric sensor; the pair of photoelectric sensors are fixedly arranged at the input end of the first connecting motor and / or the second connecting motor and are arranged at an angle relative to the joint of the material transportation line and the tray backflow line, which are used to detect whether the tray is about to enter the working range of the connecting motor; the reflective photoelectric sensor is fixedly arranged at the output end of the first connecting motor and / or the second connecting motor and is arranged as a projection of the pair of photoelectric sensors, which are used to detect whether the tray has completely left the working range of the connecting motor; the slot photoelectric sensor is linearly arranged on the conveying track of the first connecting motor and / or the second connecting motor, and the slot of the slot photoelectric sensor is opposite to the position of the tray in the transfer process, which are used to detect the position information of the tray in the moving process in real time.

[0010] Preferably, the first connecting motor and the second connecting motor are both provided with an encoder, the input end of the encoder is connected to the first connecting motor or the second connecting motor, which is used to obtain the key parameters in the running process of the motor, and the output end of the encoder is connected to the control system, which is used to transmit the obtained motor running parameters to the control system in real time.

[0011] More preferably, the encoder forms a closed-loop control system by detecting the speed, direction and position information of the motor in combination with the position, speed and state data of the tray provided by the sensor array.

[0012] The closed-loop control system specifically comprises that when the encoder detects abnormal motor speed, the control system will immediately judge whether the tray is in the correct position in combination with the feedback information of the sensor array. If the position of the tray deviates, the control system will quickly adjust the speed or direction of the motor to ensure that the tray can complete the transfer according to the predetermined trajectory.

[0013] Preferably, pressure sensors are linearly arranged on the conveying track of the tray return line to ensure that the trays return smoothly and reliably to the starting position of the material conveying line.

[0014] Preferably, the pressure sensors are connected to a closed-loop control system, which specifically includes the following steps:

[0015] Periodically acquiring pressure data of the trays exerted on the conveying track of the tray return line through the pressure sensors;

[0016] Real-time comparison of the pressure data acquired in the above step with a pre-set safety pressure threshold value; when the obtained pressure data is greater than the safety pressure threshold value, the pressure sensors continuously detect the pressure exerted by the trays on the track during the return process; when the obtained pressure data is less than or equal to the safety pressure threshold value, the pressure sensors stop the current cycle of detection and wait for the arrival of the next detection cycle;

[0017] When the pressure data acquired by the pressure sensors continuously exceeds the safety pressure threshold value for 3 consecutive times or for more than 30 seconds, the control system automatically sends an instruction to the docking motor to reduce its driving speed, so that the movement speed of the trays during the return process slows down, and the tension of the tray return line is adjusted through the tension adjusting device.

[0018] Preferably, the pre-set safety pressure threshold value is calculated by formula (1) .

[0019] Wherein, is the pressure base value generated by the self-weight of the trays; is the pressure increment generated when the speed of the trays increases from the initial speed 0 to the normal running speed 1, is the additional pressure generated by the material on the trays.

[0020] Preferably, the safety factor in formula (1) is in the range of 1-1.5, and the pressure fluctuation allowance is in the range of .

[0021] Optionally, the input end of the first docking motor and the second docking motor, which are connected to the material conveying line, is further provided with an RFID reader / writer, which is used to identify and track the identity information of the trays and record the transportation history of the trays.

[0022] Preferably, the pair of light sensors are arranged at an inclined angle of 15-55 degrees with the intersection of the material conveying line and the tray return line.

[0023] Preferably, a processing assembly is arranged between the material conveying line and the tray return line for further processing of the material conveyed from the material conveying line.

[0024] The technical scheme of the present application has the beneficial effects that:

[0025] Through reasonable space planning, the material conveying line and the tray return line are integrated in the same production line, and the rapid transfer of materials in different directions can be realized without increasing the area of the site.

[0026] Through at least two adjacent material conveying lines and a connecting motor connecting the two material conveying lines, a redundancy mode is provided for the material conveying and tray return system, which further improves the overall reliability and stability of the system. When one of the material conveying lines cannot operate normally due to equipment failure, maintenance and repair, or unexpected situations, the other material conveying line can still continue to undertake the task of conveying materials, ensuring that the material flow of the production line will not be interrupted. And under the coordination of the connecting motor, the tray return system can also adjust the operating state accordingly to ensure that the tray can smoothly return in the new material conveying line configuration, thereby minimizing the risk of the entire production process being stalled due to local faults and effectively improving production efficiency and overall operating efficiency.

[0027] Through the encoder, the operating information of the motor is fed back to the control system, and the control system adjusts the speed and operating state of the material conveying line according to the information to ensure that the material can be uniformly and stably conveyed. When one of the material conveying lines fails, the encoder will timely feed back the abnormal situation of the connecting motor to the control system. The control system adjusts another normal material conveying line and the tray return line according to the information provided by the encoder.

[0028] At the same time, the encoder monitors the speed, direction and position information of the motor in real time and transmits these data to the control system. At the same time, the system combines the tray position and state information provided by the sensor array to more accurately adjust the operating parameters of the connecting motor, ensuring the stability and accuracy of the tray during the transfer process, greatly reducing the risk of the tray being stuck or deviating during the transfer process. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A module structure diagram of the material conveying and tray return system in an embodiment of the present application;

[0030] Figure 2 A partial module structure diagram of the material conveying and tray return system in another embodiment of the present application;

[0031] Figure 3Module structure diagram of the material transportation and tray backflow system in another embodiment of the present application.

[0032] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the drawings. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein identical or similar labels denote identical or similar elements or elements having identical or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0034] In addition, if the description of "first", "second" and the like in the present application is only for the purpose of description, such as for distinguishing identical or similar elements, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0035] Reference Figures 1-2 The present application provides a material transportation and tray backflow system, comprising: at least two adjacent material transportation lines, and a tray backflow detection system arranged between the two material transportation lines; the tray backflow detection system comprises: a tray backflow line, the tray backflow line is used for conveying trays along a first conveying direction, the first conveying direction is opposite to a second conveying direction in the material transportation line, and is used for forming a "processing-backflow-reprocessing" material circulation path according to the reverse operation of the tray backflow line and the material transportation line;

[0036] One end of the tray backflow line is provided with a first connecting motor, the first connecting motor is close to a material inlet end of the material transportation line, is used for driving the tray to be smoothly transferred from the tray backflow line to the material transportation line, and restarts the material processing and transportation process along the second conveying direction; the other opposite end of the tray backflow line is provided with a second connecting motor, the second connecting motor is away from the material inlet end of the material transportation line, is used for smoothly transferring the tray from the material transportation line to the tray backflow line, and driving the tray to backflow to the material inlet end of the material transportation line along the first conveying direction;

[0037] The first and second connecting motors are each provided with a sensor array, which is used to detect the position and state information of the carrier disc and accurately control the transfer process of the carrier disc based on the detected information.

[0038] The sensor array includes a pair of photoelectric sensors, a reflective photoelectric sensor, and a slot photoelectric sensor. The pair of photoelectric sensors are fixedly arranged at the input end of the first and / or second connecting motor and are arranged at an angle relative to the intersection of the material conveying line and the carrier disc return line, and are used to detect whether the carrier disc is about to enter the working range of the connecting motor. The reflective photoelectric sensor is fixedly arranged at the output end of the first and / or second connecting motor and is used to detect whether the carrier disc has completely left the working range of the connecting motor. The slot photoelectric sensor is linearly arranged on the conveying track of the first and / or second connecting motor, and the slot of the slot photoelectric sensor is directed to the position through which the carrier disc passes during the transfer process, and is used to detect the position information of the carrier disc during the movement.

[0039] In the embodiment, the material conveying line and the carrier disc return line are integrated in the same production line through reasonable space planning, and the rapid transfer of materials in different directions can be realized without increasing the area of the site.

[0040] Specifically, when the pair of photoelectric sensors detect that the carrier disc is about to enter the working range, the control system will start the speed regulation program of the connecting motor in advance to wait for the arrival of the carrier disc at a suitable speed, so as to ensure that the carrier disc can smoothly enter the driving area of the motor.

[0041] When the reflective photoelectric sensor detects the carrier disc leaving signal, the control system will determine whether the carrier disc leaves according to the predetermined trajectory based on the position information of the carrier disc fed back by the slot photoelectric sensor, and if there is a deviation, the speed or direction of the motor will be quickly adjusted to ensure that the carrier disc can accurately complete the transfer from one conveying line to another conveying line or the return line.

[0042] When the carrier disc moves along a specific path under the driving of the motor, the slot photoelectric sensor can accurately determine the real-time position and running state of the carrier disc by detecting the situation that the carrier disc blocks the light in the slot. If the carrier disc deviates in position or abnormally runs during the transfer process, the slot photoelectric sensor will immediately detect it and transmit the related information to the control system.

[0043] Meanwhile, the above embodiment also provides a redundancy mode for the material conveying and carrier disc return system through at least two adjacent material conveying lines and the connecting motor connecting the two material conveying lines, which is used to further improve the overall reliability and stability of the system.

[0044] When one of the material transport lines cannot operate normally due to equipment failure, maintenance and repair or unexpected situations, the other material transport line can continue to undertake the task of transporting materials, ensuring that the material flow of the production line will not be interrupted. And under the coordination of the connecting motor, the disc return system can also adjust the operating state accordingly, ensuring that the disc can smoothly return under the new material transport line configuration, thereby minimizing the risk of the entire production process being stalled due to local failure, effectively improving production efficiency and overall operational efficiency.

[0045] In one embodiment, an encoder is provided on each of the first connecting motor and the second connecting motor. Specifically, the input end of the encoder is connected to the first connecting motor or the second connecting motor to obtain key parameters during motor operation, and the output end of the encoder is connected to the control system to transmit the obtained motor operating parameters to the control system in real time.

[0046] In this embodiment, the encoder feeds back the operating information of the motor to the control system, and the control system adjusts the speed and operating state of the material transport line according to the information to ensure that the materials can be transported uniformly and stably. When a material transport line fails, the encoder will feed back the abnormal situation of the connecting motor to the control system in a timely manner. The control system adjusts the other normal material transport line and the disc return line according to the information provided by the encoder. For example, by adjusting the speed and direction of the connecting motor on the normal material transport line, the transportation path and speed of the materials are changed, so that the disc can be smoothly transferred to the new material transport line for further processing and transportation. At the same time, the disc return line will also adjust its operating state according to the information fed back by the encoder to ensure that the disc can accurately return to the material inlet end of the material transport line, realizing the redundant operation and optimal configuration of the entire system.

[0047] In one embodiment, the encoder is connected to a sensor array to realize more accurate disc position tracking and real-time monitoring of the motor operating state. The encoder detects the speed, direction and position information of the motor, and combines the disc position, speed and state data provided by the sensor array to form a closed-loop control system.

[0048] The closed-loop control system specifically includes that when the encoder detects abnormal motor speed, the control system will immediately combine the feedback information of the sensor array to determine whether the disc is in the correct position. If the disc position deviates, the control system will quickly adjust the speed or direction of the motor to ensure that the disc can complete the transfer according to the predetermined trajectory.

[0049] In this embodiment, the encoder monitors the motor's speed, direction, and position information in real time and transmits these data to the control system. At the same time, the system combines the disc position and state information provided by the sensor array to more accurately adjust the operation parameters of the transfer motor, ensuring the stability and accuracy of the disc during the transfer process, and greatly reducing the risk of jamming or deviation of the disc during the transfer process.

[0050] Further, by monitoring the motor's operating state and the disc's position information in real time, the control system can detect potential faults in advance and issue warning signals in a timely manner. For example, when the encoder detects that the motor speed fluctuates greatly or the sensor array finds that the disc position frequently deviates, the control system will determine that there may be problems such as motor wear or track deviation, and prompt the operator to perform maintenance and maintenance. This preventive maintenance mechanism effectively extends the service life of the equipment and reduces production interruptions caused by sudden failures.

[0051] In one embodiment, the first and second transfer motors are provided with RFID readers at the input end of the material transport line, which are used to identify and track the identity information of the disc and record the transport history of the disc.

[0052] In this embodiment, when the disc approaches the input end of the transfer motor, the RFID reader emits electromagnetic waves to activate the RFID tag on the disc and read the unique identification code stored therein. Through the acquired identification code, the system can accurately identify the identity of each disc, regardless of how the disc flows on the production line. The system can query its transport history at any time to ensure correct tracking and management of the disc during transportation and backflow.

[0053] In one embodiment, the RFID reader and the closed-loop control system are connected through wireless communication.

[0054] In this embodiment, the RFID reader and the closed-loop control system are connected through wireless communication, which avoids the physical constraints of traditional wired connection, allowing the RFID reader to be flexibly placed according to the actual needs of the production site. Whether at the input end of the material transport line or at other key positions, its position and quantity can be easily adjusted to adapt to different production processes and process requirements, while eliminating the need for a large number of cables, junction boxes, and other hardware devices in traditional connection methods.

[0055] Further, the tray can be tracked and monitored by the RFID reader during the tray transportation and the reflow process, and the latest data can be transmitted to the closed-loop control system. The closed-loop control system can analyze and process the received tray identity information and state data in combination with the motor operation information detected by the encoder, and send precise control instructions to the docking motor and other related equipment through wireless communication to adjust the speed and direction of the motor, ensuring that the tray can smoothly and accurately complete the transfer according to the predetermined trajectory.

[0056] In one embodiment, the pair of photoelectric sensors is arranged at an oblique angle of 15-55 degrees with the intersection of the material transportation line and the tray reflow line.

[0057] In this embodiment, the pair of photoelectric sensors is installed at a specific oblique angle, and the paths of the emitted and received light form a more favorable geometric relationship with the material transportation direction. Compared with the installation perpendicular to the transportation line or parallel to the transportation line, the oblique angle of 15-55 degrees can significantly reduce the detection blind area between the sensor and the tray. Therefore, during the material transportation process, when the tray gradually approaches the intersection of the transportation line and the reflow line, the sensor can detect the presence of the tray earlier and more reliably, avoiding the missed detection caused by the tray being in the sensor blind area at the intersection, and ensuring the smoothness and reliability of the entire material transportation and reflow process.

[0058] In one embodiment, pressure sensors are linearly arranged on the conveying track of the tray reflow line, and the pressure applied by the tray to the track during the reflow process is periodically detected by the pressure sensors to ensure that the tray is smoothly and reliably reflowed to the starting position of the material transportation line.

[0059] Further, the pressure sensors are connected to the closed-loop control system, specifically including the following steps:

[0060] Periodically acquiring pressure data applied by the tray to the conveying track of the tray reflow line through the pressure sensors;

[0061] Real-time comparison of the pressure data obtained in the above steps with the pre-set safety pressure threshold; when the obtained pressure data is greater than the safety pressure threshold, the pressure sensor continuously detects the pressure applied by the tray to the track during the reflow process; when the obtained pressure data is less than or equal to the safety pressure threshold, the pressure sensor stops the current period of detection and waits for the arrival of the next detection period;

[0062] When the pressure data acquired by the pressure sensor continuously exceeds the safety pressure threshold value for 3 times or more than 30 seconds, the control system automatically sends a command to the connecting motor to reduce the driving speed, so that the movement speed of the carrier plate in the backflow process is slowed down, and the tension of the carrier plate backflow line is adjusted through the tension adjusting device.

[0063] In this embodiment, the track pressure is monitored throughout the whole section by the linearly distributed sensor array, and a closed-loop feedback mechanism is constructed by combining real-time data comparison. When continuous abnormal pressure is detected, the system can trigger dual adjustment of speed reduction and tension compensation within 30 seconds, effectively preventing track deformation accidents caused by carrier plate deviation, material accumulation or mechanical jamming.

[0064] On the other hand, the "three times over the limit / 30 seconds over time" double threshold judgment strategy is adopted, which not only avoids false actions caused by transient interference, but also ensures rapid response to real faults. Through the gradient speed regulation of the connecting motor and the coordinated adjustment of the tension device, the smooth transition of the carrier plate movement state is realized, and the continuous operation of the production line is ensured without interruption.

[0065] In one embodiment, the pre-set safety pressure threshold value Specifically, the formula (1) is calculated.

[0066] Wherein, is the pressure base value generated by the self-weight of the carrier plate; is the pressure increment generated when the carrier plate speed increases from the initial speed 0 to the normal running speed 1, is the additional pressure generated by the material on the carrier plate.

[0067] In this embodiment, the pressure applied by the carrier plate to the track under different working conditions can be more comprehensively considered, thereby providing accurate judgment basis for the closed-loop control system, effectively preventing various problems caused by abnormal pressure, and ensuring the stable operation of the material conveying line and the carrier plate backflow line.

[0068] In one embodiment, the safety factor in formula (1) is in the range of 1-1.5, and the pressure fluctuation allowance is in the range of .

[0069] In one embodiment, the material conveying line is also provided with a feeding device at the incoming end, which is used to load the material to be processed onto the carrier plate.

[0070] Referring to Figure 3 , in one embodiment, a processing assembly is provided between the material conveying line and the carrier plate backflow line, which is used to further process the material transported from the material conveying line.

[0071] For example, the processing assembly includes a toner UV curing station, a cleaning station, a glue filling station, a snap-on station, and a reservation station.

[0072] It is to be noted that, in the present document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, devices, articles, or material transport and tray reflow systems that comprise a list of elements are not limited to those elements, but can also include other elements not expressly listed or inherent to such processes, devices, articles, or material transport and tray reflow systems. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, device, article, or material transport and tray reflow system that includes the element.

[0073] The preferred embodiments of the present application are described above with the specific language and examples. However, the patent protection scope of the present application is not limited to the preferred embodiments, and any equivalent structure or equivalent process transformation based on the content of the present specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A material transport and pallet return system, comprising: The utility model relates to a kind of material conveying line and the detection system of tray backflow between two material conveying lines. The detection system of tray backflow includes: tray backflow line, the tray backflow line is used to convey tray along first conveying direction, the first conveying direction is opposite to the second conveying direction in the material conveying line, for forming a "processing-backflow-reprocessing" material circulation path according to the reverse operation of tray backflow line and material conveying line; One end of the tray backflow line is provided with a first connection motor, and the first connection motor is close to the incoming end of the material conveying line;The other opposite end of the tray backflow line is provided with a second connection motor, and the second connection motor is away from the incoming end of the material conveying line;The first connection motor and the second connection motor are both provided with a sensor array, which is used to detect the position and state information of the tray, and accurately control the transfer process of the tray based on the detected information; The sensor array includes: a pair of photoelectric sensors, a reflective photoelectric sensor, and a slot photoelectric sensor;The pair of photoelectric sensors are fixedly arranged at the input end of the first connection motor and / or the second connection motor, and are arranged at an angle relative to the intersection of the material conveying line and the tray backflow line, for detecting whether the tray is about to enter the working range of the connection motor;The reflective photoelectric sensor is fixedly arranged at the output end of the first connection motor and / or the second connection motor, and is a projection for the pair of photoelectric sensors, for detecting whether the tray has completely left the working range of the connection motor;The slot photoelectric sensor is linearly arranged on the conveying track of the first connection motor and / or the second connection motor, and the slot is directly opposite to the position where the tray passes during the transfer process, for real-time detection of the position information of the tray during the movement; The first connection motor and the second connection motor are both provided with an encoder, the input end of the encoder is connected to the first connection motor or the second connection motor, for obtaining the key parameters during the operation of the motor, and the output end of the encoder is connected to the control system, for real-time transmission of the obtained motor operation parameters to the control system; The encoder forms a closed-loop control system by detecting the speed, direction and position information of the motor, combined with the position, speed and state data of the tray provided by the sensor array; The conveying track of the tray backflow line is linearly arranged with a pressure sensor, for ensuring that the tray backflows to the starting position of the material conveying line smoothly and reliably; The pressure sensor is connected to the closed-loop control system, which includes the following steps: Periodically obtain the pressure data applied by the tray to the conveying track of the tray backflow line through the pressure sensor; Real-time compare the pressure data obtained in the above step with the pre-set safety pressure threshold value;When the obtained pressure data is greater than the safety pressure threshold value, the pressure sensor continuously detects the pressure applied by the tray to the track during the backflow process;When the obtained pressure data is less than or equal to the safety pressure threshold value, the pressure sensor stops the current period of detection, and waits for the arrival of the next detection period. ​ When the pressure data acquired by the pressure sensor continuously exceeds the safety pressure threshold for 3 times or more than 30s, the control system automatically sends a command to the docking motor to reduce its driving speed, slows down the movement speed of the carrier disc during the backflow process, and adjusts the tension of the carrier disc backflow line through the tension adjusting device.

2. A material transport and carrier tray reflow system as claimed in claim 1, wherein, The closed-loop control system is specifically: when the encoder detects abnormal motor speed, the control system will immediately combine the feedback information of the sensor array to determine whether the carrier disc is in the correct position; if the carrier disc position deviates, the control system will quickly adjust the speed or direction of the motor to ensure that the carrier disc can complete the transfer according to the predetermined trajectory.

3. The material transport and carrier tray reflow system of claim 1, wherein, The pre-set safety pressure threshold Specifically: by formula (1) Calculated wherein Pbase is the pressure base value generated by the self weight of the carrier disc; Pinc is the pressure increment generated when the carrier disc speed is increased from an initial speed 0 to a normal operating speed 1, Pextra is the additional pressure generated by the material on the carrier disc.

4. A material transport and carrier tray reflow system as claimed in claim 3, wherein, The safety factor in the formula (1) is 1-1.5, the pressure fluctuation allowance is .

5. The material transport and carrier tray reflow system of claim 1, wherein, The first docking motor and the second docking motor are provided with RFID readers for identifying and tracking the identity information of the carrier disc and recording the transportation history of the carrier disc.

6. The material transport and carrier tray reflow system of claim 1, wherein, The intersecting part of the material transportation line and the carrier disc backflow line is provided with a 15-55 degree inclined angle.

7. The material transport and carrier tray reflow system of claim 1, wherein, The material transportation line and the carrier disc backflow line are provided with a processing assembly for further processing of the materials transported from the material transportation line. The material transportation line and the carrier disc backflow line are provided with a processing assembly for further processing of the materials transported from the material transportation line.

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