Pneumatic tube logistics transmission system with blockage detection and blockage detection method

Abstract

This invention provides a pneumatic logistics transport system and method with blockage detection. The system includes a server, a switch, several area control boards, several workstations, several fan modules, transport bottles, and a path mapping system. The server is connected to the switch, the switch is connected to the area control boards, the workstations are connected via transport pipes, and the air outlets of the fan modules are connected to the air inlets of the transport pipes. The area control boards are connected to the fan modules and the workstations respectively. A motion trajectory recording module is installed on the transport bottle. The module includes a first motion processing sensor, a second motion processing sensor, a timer, a main controller, a memory, and a first wireless communication module. The path mapping system is wirelessly connected to the motion trajectory recording module. The system reads the motion trajectory of the transport bottle recorded by the module before the blockage occurs, and then maps and displays it. This invention can effectively reduce the time for troubleshooting blockages in the transport pipes and improve the operation and maintenance efficiency of the pneumatic logistics system.

Description

Technical Field

[0001] This invention belongs to the field of pneumatic logistics transport technology, and specifically relates to a pneumatic logistics transport system with blockage detection and a blockage detection method. Background Technology

[0002] Pneumatic transport systems integrate modern communication, opto-mechatronics, and other technologies to connect different floors and units within or between buildings through one or more sealed PVC pipes. By storing materials in transport bottles and using the gas flowing through the pipes as power, the transport bottles are propelled along the pipes to achieve long-distance transport of various materials. This technology has advantages such as high transport speed, low environmental pollution, and wide applicability to a wide range of materials, and is widely used in medical, warehousing, and commercial building fields.

[0003] Currently, pneumatic logistics systems typically have complex piping systems with numerous branches and bends. During transport, transfer bottles can become blocked in various places due to various reasons, such as foreign objects in the pipe, loose bottle caps causing friction between the cap and the pipe wall, improper transfer speed settings leading to bottles hitting the pipe wall, or bottle accumulation. When a blockage occurs, workers need to locate the blockage along the pipeline and then disassemble the corresponding section to clear it. However, due to the long length, complexity, and overhead installation of the pipelines, the workload is high, making blockage location extremely difficult, and incorrect pipe disassembly frequently occurs. In existing technologies, tapping and listening methods and ultrasonic testing methods are commonly used to detect pipe blockages. Among them, the tapping and listening method mainly involves tapping the pipe, and the staff determines the location of the blockage based on experience. For the complex pipe circuits of pneumatic logistics systems, the workload of troubleshooting is huge, and this method is easily affected by external interference. In addition, this method can only detect more serious pipe blockages, such as large foreign objects adhering to the pipe wall, which has significant limitations. Ultrasonic testing methods can only detect larger foreign objects and are difficult to effectively detect small particles or pipe blockages at bends.

[0004] Therefore, this invention proposes a pneumatic logistics transport system with blockage detection and a blockage detection method to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a pneumatic logistics transmission system and a blockage detection method. This system and method can effectively improve the positioning accuracy of pipeline blockages and reduce the time required to troubleshoot blockages in transmission pipelines.

[0006] To achieve the above objectives, the pneumatic logistics transmission system with blockage detection provided by the present invention includes: a server, a switch, a transmission bottle, several area control boards, several workstations, and several fan modules. Each workstation is connected to the transmission pipeline. The air outlet of the fan module is connected to the air inlet of the transmission pipeline. The fan modules and workstations are respectively connected to the area control boards. The server is connected to the switch. The switch is connected to the area control boards via a network port. The transmission bottle is equipped with a motion trajectory recording module. The motion trajectory recording module includes a first motion processing sensor, a second motion processing sensor, a timer, a main controller, a first wireless communication module, and a memory. The first motion processing sensor and the second motion processing sensor are symmetrically arranged on both sides of the body of the transmission bottle. The first motion processing sensor, the second motion processing sensor, the first wireless communication module, the timer, and the memory are respectively connected to the main controller.

[0007] A path drawing system for reading the motion trajectory of the transmission bottle includes a second wireless communication module, a laptop computer, and path drawing software. The path drawing software is installed on the laptop computer, the second wireless communication module is connected to the laptop computer via a USB port, and the first wireless communication module is wirelessly connected to the second wireless communication module.

[0008] The transmission pipeline consists of several PVC bends and PVC straight pipes. A diffuse reflection photoelectric sensor is installed at the beginning and end of each PVC straight pipe. The diffuse reflection photoelectric sensor is connected to the area control board.

[0009] The blockage detection method includes the following steps:

[0010] S1. The main controller collects the linear velocity and tilt angle data of the transport bottle before it gets blocked in the transport pipeline through the first motion processing sensor and the second motion processing sensor, and stores the linear velocity and tilt angle data in the memory. The main controller records the transport time data of the transport bottle through the timer and writes the transport time data into the memory. The main controller obtains the location information by reading the RFID chip and writes it into the memory. The location information includes the spatial coordinates of the starting workstation of the transport bottle. The main controller sends the linear velocity data, tilt angle data, transport time data and the spatial coordinates of the starting workstation in the memory to the second wireless communication module for reception through the first wireless communication module.

[0011] S2. The second wireless communication module receives linear velocity data, tilt angle data, transportation time data, and the spatial coordinates of the starting workstation and sends them to the path drawing software on the laptop via USB. The path drawing software calculates the movement path of the transmission bottle before the transmission pipeline is blocked based on the tilt angle data, linear velocity data, transportation time data, and the coordinates of the starting workstation.

[0012] S3. Number the transmission pipes and diffuse reflection photoelectric sensors. Based on the last point on the transmission pipe where the transmission bottle passes before the blockage occurs, and in conjunction with the movement path of the transmission bottle before the blockage occurs and the pipeline diagram of the pneumatic logistics transmission system, determine the blockage point of the transmission bottle.

[0013] In step S2, the formula for calculating the movement path of the transfer bottle before the transfer pipeline becomes blocked is as follows:

[0014]

[0015] In the formula, L1 and L2 are the motion paths corresponding to the data collected by the first motion processing sensor and the second motion processing sensor, respectively, t0 is the time when the transfer bottle starts moving, and t n v is the downtime when the transmission bottle is blocked. x1 v y1 v z1 These are the linear velocities of the transmission bottle along the x, y, and z axes, respectively, collected by the first motion processing sensor. x2 v y2 v z2 ∝1, β1, and γ1 represent the linear velocities of the transmission bottle along the x, y, and z axes, respectively, collected by the second motion processing sensor. ∝1, β1, and γ1 represent the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the first motion processing sensor. ∝2, β2, and γ2 represent the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the second motion processing sensor. (x0, y0, z0) represents the coordinates of the transmission bottle before displacement.

[0016] Preferably, the above technical solution also includes a bottle-blocking recycling pipeline. One end of the bottle-blocking recycling pipeline is connected to the transmission pipeline via a commutator, and the other end is connected to a recycling station and a fan module. The commutator is connected to the area control board, and the diameter of the bottle-blocking recycling pipeline is larger than that of the transmission pipeline.

[0017] Preferably, in the above technical solution, the fan module includes a fan, a reversing valve, and a pressure gauge, and the fan, reversing valve, and pressure gauge are respectively connected to the area control board.

[0018] Preferably, in the above technical solution, the fan module further includes a frequency converter, the fan is connected to the output terminal of the frequency converter, and the input terminal of the frequency converter is connected to the area control board.

[0019] Preferably, in the above technical solution, the transmission bottle further includes an RFID chip for storing the location data of the transmission bottle, and the RFID chip is connected to the main controller.

[0020] Preferably, the above technical solution further includes a pipeline diverter, which is connected to the area control panel. The input end of the pipeline diverter is connected to one of the transmission pipelines, and the output end is connected to multiple of the transmission pipelines. The pipeline diverter is connected to the area control panel.

[0021] Compared with existing technologies, the present invention has the following advantages:

[0022] 1. This invention records the movement trajectory of the transport bottle before blockage by a motion trajectory recording module installed on the transport bottle. Specifically, a first motion processing sensor and a second motion processing sensor collect the tilt angle and linear velocity data of the transport bottle before blockage in the transport pipeline. A timer collects the transport time data before blockage. The main controller reads the location information of the transport bottle recorded by the RFID chip and writes this information into the memory. The location information includes the spatial coordinates of the starting workstation of the transport bottle. The main controller writes the tilt angle, linear velocity, and time data of the transport bottle into the memory. The main controller wirelessly transmits the above data to the second wireless communication module of the path drawing system through the first wireless communication module. The second wireless communication module then sends this data to a laptop computer with path drawing software installed via a serial port. The path drawing software calculates and draws the movement path of the transport bottle before blockage in the transport pipeline by reading the tilt angle, linear velocity, time, and spatial coordinates of the starting workstation. By combining the movement path and pipeline drawings, the operator can quickly locate the blockage point in the transport pipeline and maintain the faulty pipeline in a timely manner, reducing the time for troubleshooting pipeline blockages and improving the operation and maintenance efficiency of the transport pipeline.

[0023] 2. This invention installs diffuse reflection photoelectric sensors at the beginning and end of the PVC straight pipe in the transmission pipeline. The area control board detects the position of the transmission bottle through the diffuse reflection photoelectric sensors. On the one hand, this can narrow down the scope of investigation for blockages in the transmission pipeline. On the other hand, by calculating the time difference between the two diffuse reflection photoelectric sensors and the length of the PVC straight pipe, the area control board can obtain the speed of the transmission bottle in the transmission pipeline, providing a basis for workers to adjust the speed of the fan and the speed of the transmission bottle in the transmission pipeline through the frequency converter.

[0024] 3. This invention features a dedicated bottle-blocking recovery pipeline. One end of the pipeline is connected to a recycling station and a fan module. The fan module is used to draw the transfer bottle into the bottle-blocking recovery pipeline and to clean the transfer pipeline where blockage occurs. The diameter of the bottle-blocking recovery pipeline is larger than that of the transfer pipeline to ensure that the transfer bottle can be recycled normally. By switching between the bottle-blocking recovery pipeline and the transfer pipeline using a reversing device, the risk of secondary blockage of the transfer bottle in the transfer pipeline loop can be effectively avoided compared to the original method of recycling blocked transfer bottles using the transfer pipeline. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pipeline loop structure of the pneumatic logistics transport system with blockage detection according to the present invention.

[0026] Figure 2 This is a schematic diagram of the electrical control circuit structure of the pneumatic logistics transport system with blockage detection according to the present invention.

[0027] Figure 3 This is a schematic diagram of the circuit structure of the motion trajectory recording module of the pneumatic logistics transport system with blockage detection according to the present invention.

[0028] Figure 4 This is a schematic diagram of the blockage recovery pipeline loop structure of the pneumatic logistics transport system with blockage detection of the present invention.

[0029] Figure 5 This is a demonstration diagram of the blockage path of the transport bottle drawn by the path depiction system of the pneumatic logistics transport system with blockage detection of the present invention.

[0030] In the diagram: 1—Fan module, 2—Pipeline distributor, 3—Workstation, 4—Transmission pipeline, 5—Bottleneck recovery pipeline, 6—Recycling station, 7—Commutator, 8—Server, 9—Switch, 10—Workstation control board, 11—Pressure gauge, 12—Commutating valve, 13—Inverter, 14—Area control board, 15—Fan, 100—Main controller, 101—First motion processing sensor, 102—Second motion processing sensor, 103—Timer, 104—Memory, 105—First wireless communication module. Detailed Implementation

[0031] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the invention is not limited to the specific embodiments.

[0032] refer to Figure 1 and Figure 2The pneumatic logistics transport system with blockage detection includes several fan modules 1, several transport pipes 4, several workstations 3, several area control boards 14, transport bottles, a server 8, and a switch 9. Each workstation 3 is connected via a transport pipe 4. The air outlet of the fan module 1 is connected to the air inlet of the transport pipe 4. Each transport pipe 4 is split by a pipe splitter 2, which consists of a main transport pipe, a bend pipe for reversing direction, and several branch transport pipes. The pipe splitter 2 is connected to the area control board 14, and the server 8 is connected to the switch 9. The switch 9 is connected to... The area control board 14 is connected via a network port and is connected to the fan module 1 and the workstation 3 respectively. The workstation 3 is equipped with a workstation control board 10, and the area control board 14 is connected to the workstation control board 10 to realize control. The fan module 1 includes a fan 15, a pressure gauge 11, a reversing valve 12 and a frequency converter 13. The pressure gauge 11, the reversing valve 12 and the frequency converter 13 are connected to the area control board 14 respectively. The frequency converter 13 is connected to the fan 15. The transmission bottle is equipped with an RFID chip for storing the location information of the transmission bottle. The location information includes the spatial coordinates of the starting workstation 3 of the transmission bottle.

[0033] Workstation 3, which requires bottle transport, sends a request to area control board 14 via workstation control board 10. Based on the requested data, area control board 14 sends a transport command to the bottle-starting workstation 3 and controls the pipeline splitter 2 to position the pipeline, ensuring a straight-through connection between workstation 3 requiring bottle transport and the bottle-starting workstation 3. Area control board 14 then uses reversing valve 12 to switch the airflow direction of fan 15 to the blowing position. Finally, area control board 14 controls frequency converter 13 to drive fan 15 through the transport pipeline. 4. Air blowing provides power for the movement of the transport bottle within the transport pipe 4. After the transport bottle arrives at the workstation 3 that requires transport, the area control board 14 controls the fan module 1 to be in the suction position to recycle the transport bottle back to the starting workstation 3. The pressure gauge 11 is installed in the transport pipe 4 near the air outlet of the fan 16 to monitor the air pressure value in the transport pipe 4 in real time. The server 8 realizes information interaction and control of each area control board 14 through the switch 9. In this embodiment, the reversing valve 12 is a three-position two-way pneumatic reversing solenoid valve.

[0034] refer to Figure 3The pneumatic logistics transport system with blockage detection proposed in this invention has a motion trajectory recording module on the transport bottle. The motion trajectory recording module includes a first motion processing sensor 101, a second motion processing sensor 102, a timer 103, a main controller 100, a memory 104, and a first wireless communication module 105. The first motion processing sensor 101 and the second motion processing sensor 102 are respectively connected to the main controller 100. The first motion processing sensor 101 and the second motion processing sensor 102 are symmetrically arranged on both sides of the transport bottle body, used to collect angular velocity data and tilt angle data of the transport bottle in the transport pipe 4. The timer 103 and the memory 104 are respectively connected to the main controller 105. 03 is used to collect time data from the start of transport of the transfer bottle to the point where the obstruction occurs. The main controller 100 writes the angular velocity data and tilt angle data collected by the first motion processing sensor 101 and the second motion processing sensor 102, as well as the time data of the timer 103, into the memory 104. The first wireless communication module 105 is connected to the main controller 100. In this embodiment, the first motion processing sensor 101 and the second motion processing sensor 102 are selected as MPU6050 motion processing sensors, the timer 103 is selected as an ICM7555 timing chip, the main controller 100 is selected as an STC8H8K64U chip, and the memory 104 is selected as an AT24C02ERRPOROM chip.

[0035] The main controller 100 is connected to the RFID chip of the transmission bottle. The main controller 100 reads the spatial coordinate information of the starting workstation 3 of the transmission bottle on the RFID chip and writes the spatial coordinates into the memory 104.

[0036] The pneumatic logistics transport system with blockage detection also includes a path drawing system for reading the movement trajectory of the transport bottle. The path drawing system includes a second wireless communication module, a laptop computer, and path drawing software. The path drawing software is installed on the laptop computer. The second wireless communication module is connected to the laptop computer via a USB port. The first wireless communication module is wirelessly connected to the second wireless communication module. In this embodiment, the first and second wireless communication modules are NRF2401 wireless modules.

[0037] Continue to refer Figure 1The pneumatic logistics transport system with blockage detection consists of several PVC bends and straight PVC pipes. A diffuse reflection photoelectric sensor is installed at the beginning and end of each straight PVC pipe. The diffuse reflection photoelectric sensor is connected to the area control board 14. The area control board 14 calculates the transport speed of the transport bottle in the transport pipe 4 based on the time difference between the two diffuse reflection photoelectric sensors and the length of the straight PVC pipe. This provides a basis for the staff to adjust the speed of the fan 15 by adjusting the speed of the fan 15 through the frequency converter 13 to adjust the movement speed of the transport bottle in the transport pipe 4. At the same time, the position of the transport bottle in the transport pipe 4 is detected, which can narrow down the scope of the transport pipe where the transport bottle is blocked.

[0038] refer to Figure 4 The pneumatic logistics transport system with blockage detection also includes a bottle recovery pipe 5 and a recovery station 6. One end of the recovery station 6 is equipped with a fan module 1. A pipe splitter 2 is installed between the recovery station 6 and the bottle recovery pipe 5. The bottle recovery pipe 5 and the transport pipe 4 are connected via a reversing device 17. The diameter of the bottle recovery pipe 5 is larger than that of the transport pipe 4 to effectively avoid the risk of secondary blockage of the transport bottle in the transport pipe loop. The reversing device 7 consists of a main transport pipe and two branch pipes. The reversing device 7 is connected to the area control board 14. When the area control board 14... When the pressure gauge 11 detects that the pressure is too high, it indicates that the transfer bottle is blocked in the transfer pipeline 4. The area control board 14 controls the reversing valve 12 to close the air intake circuit of the transfer pipeline 4 and controls the frequency converter 13 to stop working so that the fan 15 stops. Then, the area control board 14 controls the reversing device 7 and the pipeline splitter 2 in the blocked bottle recovery pipeline 5 circuit to straighten the pipeline, so that the pipeline between the recovery station 6, the blocked bottle recovery pipeline 5 and the reversing device 7 is connected. The area control board 14 controls the fan module 1 near the recovery station 6 to the suction position so as to suck the blocked transfer bottle into the recovery station 6.

[0039] This invention relates to a pneumatic logistics transport system with blockage detection, wherein the blockage detection method includes the following steps:

[0040] S1. The main controller 100 collects the linear velocity data and tilt angle data of the transport bottle before it gets blocked in the transport pipe 4 through the first motion processing sensor 101 and the second motion processing sensor 102, and stores the linear velocity data and tilt angle data in the memory 104. The main controller 100 records the transport time data of the transport bottle through the timer 103 and writes the transport time data into the memory 104. The main controller 100 obtains the location information by reading the RFID chip and writes it into the memory 104. The location information includes the spatial coordinates of the starting workstation 3 of the transport bottle. The main controller 100 sends the linear velocity data, tilt angle data, transport time data and the spatial coordinates of the starting workstation 3 in the memory 104 to the second wireless communication module for reception through the first wireless communication module 105.

[0041] S2. The second wireless communication module receives linear velocity data, tilt angle data, transportation time data, and the spatial coordinates of the starting workstation 3 and sends them to the path drawing software on the laptop via USB. The path drawing software calculates the movement path of the transmission bottle before the transmission pipeline 4 is blocked based on the tilt angle data, linear velocity data, transportation time data, and the coordinates of the starting workstation.

[0042] S3. Number the transmission pipe 4 and the diffuse reflection photoelectric sensor. Based on the last diffuse reflection photoelectric sensor on the transmission pipe 4 that the transmission bottle passes through before the blockage occurs, and combined with the movement path of the transmission bottle before the blockage occurs and the pipeline diagram of the pneumatic logistics transmission system, determine the blockage point of the transmission bottle.

[0043] Specifically, in step S2, the formula for calculating the movement path of the transfer bottle before the blockage occurs in the transfer pipeline is as follows:

[0044]

[0045] In the formula, L1 and L2 are the motion paths corresponding to the data collected by the first motion processing sensor 101 and the second motion processing sensor 102, respectively, t0 is the time when the transfer bottle starts moving, and t n v is the downtime when the transmission bottle is blocked. x1 v y1 v z1 These are the linear velocities of the transmission bottle along the x, y, and z axes, respectively, collected by the first motion processing sensor 101. x2 v y2 v z2 ∝1, β1, and γ1 are the linear velocities of the transmission bottle in the x, y, and z axes, respectively, collected by the second motion processing sensor 102. ∝1, β1, and γ1 are the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the first motion processing sensor 101. ∝2, β2, and γ2 are the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the second motion processing sensor 102. (x0, y0, z0) represents the coordinates of the transmission bottle before displacement.

[0046] Specifically, when the transport bottle encounters an obstruction within the transport pipe 4, the area control board 14 records the number of the last diffuse reflection photoelectric sensor the transport bottle passed through and the number of the transport pipe 4 it was located in. The laptop of the path depiction system establishes communication with the server 8 via a wireless network to obtain the number of the last diffuse reflection photoelectric sensor the transport bottle passed through and the number of the transport pipe 4 it was located in. Maintenance personnel, combining this with the pipeline diagram of the pneumatic logistics transport system, determine the approximate range of the obstruction point in the transport pipe 4. Upon arriving at the obstruction point, the maintenance personnel control the second wireless communication module to establish communication with the first wireless communication module 105 via the path depiction software. After establishing communication, the path depiction software reads the transport bottle's movement path command. The first wireless communication module 105 sends the movement path command to the main controller 100. The main controller 100 sends the tilt angle data, linear velocity data, transport time data, and coordinates of the starting work station stored in the memory 104 to the second wireless communication module via the first wireless communication module 105. The second wireless communication module then receives the data via a USB serial port transmitted to the path depiction software on the laptop. The path depiction software then... Based on this data, motion paths L1 and L2 are calculated and plotted point by point in three-dimensional spatial coordinates. The path drawing software communicates with server 8 via wireless network to obtain the diffuse reflection photoelectric sensor detection signals at the beginning and end of the PVC straight pipe of the transmission pipeline 4 collected by area control board 14. This simplifies motion paths L1 and L2. When both the beginning and end of the PVC straight pipe's diffuse reflection photoelectric sensors detect the passing of the transport bottle, the preceding motion path can be omitted, thus simplifying the motion path and saving computing resources. Workers can quickly locate blockages in the transmission pipeline using motion paths L1 and L2, enabling timely maintenance of faulty pipelines, reducing the time spent troubleshooting blockages, and improving the operational efficiency of the transmission pipeline 4. Furthermore, since motion paths L1 and L2 are the motion data of the transport bottle collected by the first motion processing sensor 101 and the second motion processing sensor 102, respectively, motion paths L1 and L2 can be fitted into a single motion path L for display. The motion path L of the transport bottle before obstruction within the transmission pipeline 4, drawn by the path drawing software, is shown below. Figure 5 As shown, the transmission bottle is blocked at point d in the transmission pipe 4. The coordinates of point d are (15,22,31). The diffuse reflection photoelectric sensor near this section of the transmission pipe 4 is numbered g52.

[0047] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A pneumatic logistics transmission system with blockage detection, comprising a server, a switch, several area control boards, several workstations, and several fan modules, each workstation being connected via a transmission pipeline, the air outlet of each fan module being connected to the air inlet of the transmission pipeline, the fan modules and workstations being connected to the area control boards respectively, the server being connected to the switch, and the switch being connected to the area control boards via a network port, characterized in that: It also includes a transmission bottle, on which a motion trajectory recording module is provided. The motion trajectory recording module includes a first motion processing sensor, a second motion processing sensor, a timer, a main controller, a memory, and a first wireless communication module. The first motion processing sensor and the second motion processing sensor are symmetrically arranged on both sides of the body of the transmission bottle. The first motion processing sensor, the second motion processing sensor, the timer, the memory, and the first wireless communication module are respectively connected to the main controller. A path drawing system for reading the motion trajectory of the transmission bottle includes a second wireless communication module, a laptop computer, and path drawing software. The path drawing software is installed on the laptop computer, the second wireless communication module is connected to the laptop computer via a USB port, and the first wireless communication module is wirelessly connected to the second wireless communication module. The transmission pipeline consists of several PVC bends and PVC straight pipes. A diffuse reflection photoelectric sensor is installed at the beginning and end of each PVC straight pipe. The diffuse reflection photoelectric sensor is connected to the area control board. The blockage detection method includes the following steps: S1. The main controller collects the linear velocity and tilt angle data of the transport bottle before it gets blocked in the transport pipeline through the first motion processing sensor and the second motion processing sensor, and stores the linear velocity and tilt angle data in the memory. The main controller records the transport time data of the transport bottle through the timer and writes the transport time data into the memory. The main controller obtains the location information by reading the RFID chip and writes it into the memory. The location information includes the spatial coordinates of the starting workstation of the transport bottle. The main controller sends the linear velocity data, tilt angle data, transport time data and the spatial coordinates of the starting workstation in the memory to the second wireless communication module for reception through the first wireless communication module. S2. The second wireless communication module receives linear velocity data, tilt angle data, transportation time data, and the spatial coordinates of the starting workstation and sends them to the path drawing software on the laptop via USB. The path drawing software calculates the movement path of the transmission bottle before the transmission pipeline is blocked based on the tilt angle data, linear velocity data, transportation time data, and the coordinates of the starting workstation. S3. Number the transmission pipes and diffuse reflection photoelectric sensors. Based on the last point on the transmission pipe where the transmission bottle passes before the blockage occurs, and in conjunction with the movement path of the transmission bottle before the blockage occurs and the pipeline diagram of the pneumatic logistics transmission system, determine the blockage point of the transmission bottle. In step S2, the formula for calculating the movement path of the transfer bottle before the transfer pipeline becomes blocked is as follows: In the formula, L1 and L2 are the motion paths corresponding to the data collected by the first motion processing sensor and the second motion processing sensor, respectively, t0 is the time when the transfer bottle starts moving, and t n v is the downtime when the transmission bottle is blocked. x1 v y1 v z1 These are the linear velocities of the transmission bottle along the x, y, and z axes, respectively, collected by the first motion processing sensor. x2 v y2 v z2 ∝1, β1, and γ1 represent the linear velocities of the transmission bottle along the x, y, and z axes, respectively, collected by the second motion processing sensor. ∝1, β1, and γ1 represent the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the first motion processing sensor. ∝2, β2, and γ2 represent the tilt angles of the transmission bottle relative to the x, y, and z axes, respectively, collected by the second motion processing sensor. (x0, y0, z0) represents the coordinates of the transmission bottle before displacement.

2. The pneumatic logistics transport system with blockage detection according to claim 1, characterized in that, It also includes a bottle-blocking recycling pipeline, one end of which is connected to the transmission pipeline via a commutator, and the other end is connected to a recycling station and a fan module. The commutator is connected to the area control board, and the diameter of the bottle-blocking recycling pipeline is larger than that of the transmission pipeline.

3. The pneumatic logistics transport system with blockage detection according to claim 1, characterized in that, The fan module includes a fan, a reversing valve, and a pressure gauge, which are respectively connected to the area control board.

4. The pneumatic logistics transport system with blockage detection according to claim 3, characterized in that, The fan module also includes a frequency converter, the fan is connected to the output terminal of the frequency converter, and the input terminal of the frequency converter is connected to the area control board.

5. The pneumatic logistics transport system with blockage detection according to claim 1, characterized in that, The transport bottle also includes an RFID chip for storing the location information of the transport bottle, and the RFID chip is connected to the main controller.

6. The pneumatic logistics transport system with blockage detection according to claim 1, characterized in that, It also includes a pipe splitter, the input end of which is connected to one of the transmission pipes, and the output end of which is connected to multiple of the transmission pipes. The pipe splitter is also connected to the area control panel.

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