Circulation control method and system for pressure difference channel of clean laboratory and storage medium

Abstract

The invention relates to the technical field of air purification and ventilation, and discloses a circulation control method and system for a pressure difference channel of a clean laboratory and a storage medium, the method is based on a clean conveying line and a dirty conveying line, each line comprises a conveying channel, a buffer cabin and a sealing door, and an air feeder and an exhaust fan are arranged in the channels respectively. The rotating speed and the working time of the fan are adjusted according to the volume and the number of the flow devices by obtaining the flow instruction, and the conveying line can be disinfected according to the cleaning instruction. According to the method, pollution can be effectively avoided, circulation requirements can be accurately matched, the conveying line is regularly cleaned, the operation quality of a clean laboratory is comprehensively guaranteed, and it is ensured that the requirement for high cleanliness of an experiment space is met.

Description

Technical Field

[0001] The present application relates to the technical field of air purification and ventilation, and in particular to a flow control method, system and storage medium for a pressure difference channel in a clean laboratory. Background Art

[0002] A clean laboratory is a special experimental site with extremely high requirements for environmental cleanliness, and contains multiple experimental spaces. For example, a breeding laboratory for experimental animals includes a cleaning room, a common breeding room, and an ultra-high breeding room. Depending on the size, there can be multiple spaces for each. The spaces are separated by doors and walls, and then connected through various conveying channels. There are circulators in the conveying channels to realize the circulation work in different spaces.

[0003] There is a conveying device in the conveying channel, and the flow device and the manipulator are placed on the conveying device. Then, according to the set planned path, the flow device is transported to the corresponding experimental space through the conveying device.

[0004] Since the experimental spaces are connected by the conveying channel, although a sealed door is provided in the conveying channel, when the flow device flows through the sealed door, the experimental spaces will be interconnected for a period of time. The contaminated experimental space may affect the uncontaminated experimental space, thus making it impossible to guarantee the cleanliness requirements of the experimental space. Summary of the invention

[0005] In order to reduce the pollution impact caused by the flow device flowing between different experimental spaces, the present application provides a flow control method, system and storage medium for a pressure difference channel in a clean laboratory.

[0006] In the first aspect, the present application provides a flow control method for a pressure differential channel in a clean laboratory, which adopts the following technical solution: A flow control method for a pressure differential channel of a clean laboratory is based on a clean conveying line and a dirty conveying line; the clean conveying line comprises a clean conveying channel, a clean buffer cabin connected to the clean conveying channel, and a clean sealing door located before and after the clean buffer cabin; the dirty conveying line comprises a dirty conveying channel, a dirty buffer cabin connected to the dirty conveying channel, and a dirty sealing door located before and after the dirty buffer cabin; a blower is arranged in the clean conveying channel; an exhaust fan is arranged in the dirty conveying channel; The method comprises the following steps: Obtaining a first circulation instruction, closing the dirty sealing door and opening the clean sealing door according to the first circulation instruction, and setting the blower to continuously operate at a first speed for a first set time; The first rotation speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the first rotation speed; the smaller the volume of the flow rotor, the larger the first rotation speed; The first setting time is adjusted in a positive correlation according to the number of the circulators; the more the number of the circulators is, the longer the first setting time is; the fewer the number of the circulators is, the shorter the first setting time is; Obtain a second flow instruction, close the clean sealed door and open the dirty sealed door according to the second flow instruction, and set the exhaust fan to operate at a second speed for a second set time; The second speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the second speed; the smaller the volume of the flow rotor, the larger the second speed; The second set time is adjusted in positive correlation according to the number of the circulators; the more the number of the circulators, the longer the second set time; the fewer the number of the circulators, the shorter the second set time; A cleaning instruction is obtained, and a disinfection operation is started on the clean conveying line and the dirty conveying line according to the cleaning instruction.

[0007] By adopting the above technical solution, by setting up clean conveying lines and dirty conveying lines, and equipping them with corresponding sealing doors, fans and other facilities respectively, during the circulation of the rotator, according to different circulation instructions, the opening and closing of the clean sealing door and the dirty sealing door, as well as the working status of the blower and the exhaust fan can be reasonably controlled, which can effectively avoid the influence of the polluted experimental space on the non-polluted experimental space, better ensure the cleanliness requirements of the experimental space, and greatly reduce the pollution risk caused by the circulation of the rotator between different experimental spaces. The fan speed is adjusted inversely according to the size of the rotator, and the fan working time is adjusted in a positive correlation according to the number of rotators. This flexible adjustment method can more accurately match the circulation requirements of the rotator under different circumstances. For large rotators, the fan speed is reduced to avoid unnecessary disturbances and potential pollution caused by excessive wind speed; for a large number of rotators, the fan working time is extended to ensure sufficient air replacement and purification effects, thereby further improving the cleanliness control level during the circulation process. After obtaining the cleaning instructions, the disinfection operation is started on the clean conveyor line and the dirty conveyor line. This measure can regularly clean and disinfect the conveyor line comprehensively, effectively remove pollutants that may remain during the circulation process, maintain the clean state of the conveyor line, and provide a relatively clean and safe environment for subsequent circulation work, thus ensuring the overall operation quality of the clean laboratory and the accuracy of the experimental results.

[0008] Optionally, based on the fact that a first differential pressure sensor is provided in the clean conveying channel and a second differential pressure sensor is provided in the dirty conveying channel, the method further comprises the following steps: When the blower is set to operate at a first speed for a first set time, a first pressure difference is acquired based on the first pressure difference sensor; The difference between the first pressure difference and the preset first threshold is calculated as a first difference; if the first difference is greater than a set value, a first warning prompt is issued; otherwise, the magnitude of the first speed is adjusted according to the anti-correlation of the first difference; the larger the first difference is, the smaller the first speed is; the smaller the first difference is, the larger the first speed is; When the exhaust fan is set to operate at a second speed for a second set time, a second pressure difference is obtained based on the second pressure difference sensor; The difference between the second pressure difference and the preset second threshold is calculated as the second difference; if the second difference is greater than the set value, a second warning prompt is issued; otherwise, the second speed is adjusted in an anti-correlated manner according to the second difference; the larger the second difference, the smaller the second speed; the smaller the second difference, the larger the second speed.

[0009] By adopting the above technical solution, a first differential pressure sensor and a second differential pressure sensor are respectively arranged in the clean conveying channel and the dirty conveying channel, so that the differential pressure data in the channel can be obtained in real time. The system can dynamically adjust the fan speed based on the actual differential pressure situation, rather than relying solely on the preset adjustment method based on the volume and number of the flow device. The fan speed is adjusted inversely according to the difference between the obtained differential pressure and the preset threshold value, so that the adjustment is more accurate. When the difference is large, it means that the pressure situation in the current channel is relatively good. Appropriately reducing the fan speed can save energy and reduce the noise and equipment loss generated by the fan operation while meeting the cleanliness requirements; when the difference is small, the fan speed is increased to better maintain the air flow and pressure balance in the channel to ensure that the cleanliness of the experimental space is not affected. When the calculated first difference or the second difference is greater than the set value, an early warning prompt is issued. The operator can promptly understand the abnormal conditions that may exist during the operation of the system. For example, an excessively large differential pressure difference may mean that the sealing effect of the sealing door is poor, the fan fails, or other problems that affect the pressure balance in the channel. Through early warning prompts, operators can quickly take appropriate measures to investigate and repair, avoiding the increased risk of contamination in the experimental space due to potential problems, thereby enhancing the reliability and safety of the entire clean laboratory pressure difference channel flow control system. In the actual operation process, the working conditions of the clean laboratory may be affected by many factors, such as the operation of experimental equipment, the entry and exit of personnel, etc., all of which may cause the pressure difference in the channel to change. By monitoring the pressure difference in real time and adjusting the fan speed according to the difference, the system can better adapt to these complex and changeable working conditions, maintain a stable operating state, and ensure that the risk of contamination in the flow process of the flow device can be effectively reduced under different circumstances, providing a strong guarantee for the normal operation of the clean laboratory.

[0010] Optionally, the clean conveying channel includes a first clean branch and a second clean branch, and the clean sealing door is provided on both the first clean branch and the second clean branch. The method further includes the following steps: Obtain a third flow transfer instruction, close the dirty sealed door according to the third flow transfer instruction, open the clean sealed door corresponding to the first clean branch, and close the clean sealed door and the dirty sealed door on the second clean branch; Setting the blower to operate at a third speed for a third set time; During the third set time, adjusting the opening and closing degree and opening and closing time of the clean sealing door according to the running speed and position information of the circulator; When the distance between the flow device and the clean sealing door corresponding to the first clean branch is less than a set value, gradually opening the clean sealing door at a first set speed; After the flow device passes through the clean sealed door, the clean sealed door is closed at a second set speed; wherein the first set speed is less than the second set speed.

[0011] By adopting the above technical solution, different branches of the clean conveying channel are controlled separately, and the clean sealed door of a specific branch can be accurately opened and closed according to the actual flow requirements, avoiding unnecessary air circulation and potential pollution. For example, when the flower only needs to be transported to the experimental space corresponding to the first clean branch, the sealed door of the second clean branch is closed, which effectively reduces the contact area between the clean space and the outside world and reduces the risk of pollution. The opening and closing degree and time of the clean sealed door are dynamically adjusted according to the running speed and position information of the flower, so as to achieve efficient connection of the flow process. Prepare enough passage space in advance to ensure the smooth passage of the flower, avoiding the flow jam caused by the untimely opening or insufficient opening of the sealed door. At the same time, the sealed door is quickly closed after the flower passes, which reduces the time window for the clean space to be contaminated and improves the safety of the entire system. When the flower stops abnormally, timely adjustment of the opening and closing degree of the sealed door helps to maintain the pressure stability in the clean conveying channel. A stable pressure environment is crucial to maintaining the cleanliness of a clean space. It can prevent the spread of pollutants caused by pressure fluctuations, ensure the normal operation of the clean laboratory, and provide a reliable environmental foundation for the smooth conduct of experiments.

[0012] Optionally, the step of obtaining the first transfer instruction includes: Based on the plurality of infrared sensors placed in sequence at the entrance of the clean conveying channel, when the flow device passes through the plurality of infrared sensors placed in sequence, a first response sequence of the infrared sensors is obtained; and according to the first response sequence, a corresponding first flow instruction is matched; The step of obtaining the second transfer instruction comprises: Based on multiple pressure sensors placed in sequence set at the entrance of the dirty conveying channel, when the flow device passes through the multiple pressure sensors placed in sequence, a second response sequence of the pressure sensors is obtained; according to the second response sequence, a corresponding second flow instruction is matched.

[0013] By adopting the above technical solution, multiple infrared sensors arranged in sequence are set at the entrance of the clean conveying channel. By using the signal changes caused by the object blocking the infrared light, the position, speed, direction and other information of the flow device when entering can be accurately captured to form a unique first response sequence. Similarly, the pressure sensor set at the entrance of the dirty conveying channel obtains the second response sequence by detecting the pressure changes caused by the flow device passing through. Matching the corresponding flow instructions based on these precise response sequences greatly improves the accuracy of instruction acquisition, avoids equipment misoperation or transportation confusion caused by incorrect instructions, and ensures that the flow device can accurately operate in different conveying channels according to the predetermined process and path.

[0014] Optionally, a particle detector is configured in the experimental space, and the method further comprises: Obtain cleanliness data of particle detectors in real time; Monitor the change trend of the cleanliness in the experimental space. When it is detected that the cleanliness is in a decreasing state and the decreasing speed exceeds the set decreasing threshold, adjust the speed of the air supply fan and the exhaust fan according to the cleanliness; When the cleanliness is lower, the rotation speed of the air supply fan and the exhaust fan is higher; The higher the cleanliness level, the smaller the rotation speeds of the air supply fan and the exhaust fan.

[0015] By adopting the above technical solution, the cleanliness data of the particle detector can be obtained in real time and its changing trend can be monitored, so that abnormal changes in the cleanliness in the experimental space can be discovered in time. When the cleanliness decreases faster than the set threshold, the speed of the air supply fan and the exhaust fan is adjusted according to the cleanliness level. This precise dynamic control mechanism can quickly and effectively respond to fluctuations in cleanliness. When the cleanliness is low, the speed of the air supply fan and the exhaust fan is increased to speed up the circulation and replacement of air, forcefully discharge pollutants, and quickly improve the cleanliness; when the cleanliness is high, the fan speed is reduced to avoid excessive ventilation causing energy waste and unnecessary equipment loss. At the same time, it also maintains a relatively stable microenvironment in the experimental space, providing a reliable clean environment guarantee for the smooth progress of the experiment.

[0016] Optionally, a high-speed camera is provided in the experimental space for acquiring image information of the transparent clean conveying channel and the dirty conveying channel, and a blowing device with adjustable speed and angle is provided on both side walls of the channel, and the method further comprises: When the flow device passes through the clean conveying channel or the dirty conveying channel, image information in the experimental space is obtained as a channel picture; Identify the flow circulator and the conveying channel from the channel image, calculate the position offset and the offset angle of the flow circulator according to the position information of the flow circulator and the conveying channel and the preset standard position; and calculate the conveying direction of the flow circulator; If the position offset exceeds a preset error range, an alarm signal is issued; The rotation speed of the blowing device is adjusted according to the position offset, wherein the larger the position offset, the larger the rotation speed of the blowing device; and the smaller the position offset, the smaller the rotation speed of the blowing device; The blowing device is identified from the channel image; and the blowing direction of the blowing device is calculated according to the offset angle, the position information of the blowing device in the channel image, and the conveying direction of the flow device.

[0017] By adopting the above technical solution, the channel image information is obtained by a high-speed camera in the experimental space, and the position of the flow rotor and the conveying channel can be accurately identified. By calculating the position offset, offset angle and conveying direction of the flow rotor, the speed and blowing direction of the blowing device can be adjusted in a targeted manner. This precise calculation and control mechanism enables the blowing device to act on the flow rotor with just the right wind force and angle, correct its position deviation in time, and ensure that the flow rotor always maintains the correct running trajectory in the conveying channel, greatly improving the accuracy and stability of the circulation process, reducing collisions, damage and other problems that may be caused by the displacement of the flow rotor, and ensuring the safe transportation of experimental items. When it is detected that the position offset of the flow rotor exceeds the preset error range, the system immediately sends an alarm signal. This early warning mechanism enables staff to quickly know the abnormal situation during transportation and take corresponding measures to deal with it in time. For example, staff can check whether the conveying equipment is faulty in time, or adjust the loading method of the flow rotor, etc., to avoid more serious problems caused by the continuous displacement of the flow rotor, ensure the normal operation of the clean laboratory transportation system, and reduce the risk of experimental interruption. The entire technical solution realizes a fully automated process from image acquisition, information recognition, data analysis to equipment control. The high-speed camera automatically acquires images, automatically identifies and calculates relevant parameters through algorithms, and then automatically controls the blowing device for adjustment without excessive human intervention.

[0018] Optionally, a camera is installed at a set position in the conveying space to obtain image information of the transparent clean conveying channel and the set object position of the dirty conveying channel. The method comprises the following steps: The continuous frame images at a specific position are acquired based on the camera as monitoring images; identifying the flow device from the monitoring image; Calculating the distance between adjacent flow devices as an adjacent distance, and calculating the change in the adjacent distance; If the adjacent distance is less than the set distance value, an early warning prompt is issued; If the change in the adjacent distance is greater than or equal to the set change, an early warning prompt is issued.

[0019] By adopting the above technical solution, the camera is used to obtain images of large-angle points such as turns or slopes, identify the flowmeter, calculate the distance between adjacent flowmeters and their changes, and monitor the operating status of the flowmeter in the conveying channel in real time. When the adjacent distance is less than the set distance value, an early warning prompt is issued, which helps to avoid blockage and collision accidents between flowmeters. In a clean laboratory, the flowmeter carries important experimental samples or equipment. Once a collision occurs, it will not only damage the flowmeter itself, but also cause contamination of experimental samples or equipment failure, affecting the normal progress of the experiment. Early warning allows staff to take timely measures, such as adjusting the conveying speed or checking the operating status of the equipment, to ensure the safety of the transportation process.

[0020] Optionally, photoelectric sensors are provided at the entrance of the clean conveying channel and the exit of the dirty conveying channel, and the method further comprises the following steps: The number of times the photoelectric sensor signal at the entrance of the clean conveying channel changes within a set time period is counted as a first number; the number of times the photoelectric sensor signal at the exit of the dirty conveying channel changes is a second number; The difference between the first quantity and the second quantity is calculated as a period difference; if the period difference is greater than a set difference, an early warning prompt is issued.

[0021] By adopting the above technical solution, photoelectric sensors are set at the entrance of the clean conveying channel and the exit of the dirty conveying channel, and the number of signal changes within a set time period is counted, so that the number of passes of the flow device at these two key positions can be accurately grasped. By calculating the difference between the first number and the second number, an early warning prompt is issued once the period difference is greater than the set difference, which enables the system to promptly detect abnormal situations such as loss of items, blockage or equipment failure that may occur during transportation.

[0022] In the second aspect, the present application provides a flow control system for a pressure differential channel in a clean laboratory, which adopts the following technical solution: A flow control system for a pressure differential channel in a clean laboratory comprises a processor, wherein the processor executes the steps of the flow control method for the pressure differential channel in a clean laboratory as described in any one of the above.

[0023] In a third aspect, the present application provides a storage medium, which adopts the following technical solution: A storage medium stores a program, and when the program is executed by a processor, the steps of the flow control method for a pressure difference channel in a clean laboratory are implemented.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: By constructing independent clean conveyor lines and dirty conveyor lines, and coordinating intelligently controlled sealed doors and fans, the impact of polluted experimental space on clean experimental space is greatly reduced, strictly ensuring the high cleanliness requirements of the experimental space, and providing reliable basic conditions for various experiments with demanding environmental requirements.

[0025] Based on various factors such as the volume and number of the flow devices, the pressure difference within the channel, and the cleanliness of the experimental space, the fan speed, sealing door opening and closing, blowing device operation and other parameters are adjusted in real time and accurately. This can not only meet different flow needs, but also flexibly respond to changes in complex working conditions, ensuring that the system is always in an efficient and stable operating state, effectively improving the safety and reliability of the flow process.

[0026] A variety of sensors and cameras are used to achieve all-round monitoring of the position, quantity, adjacent spacing, channel blockage, etc. of the flowmeters. Once an abnormal situation occurs, an early warning prompt can be quickly issued, which is convenient for staff to find and deal with the problem in time, avoid the expansion of the fault, ensure the smooth operation of the clean laboratory transportation system, and reduce the risk of experimental interruption.

[0027] From instruction acquisition, data collection and analysis to equipment control and adjustment, the entire process is highly automated, which reduces manual intervention, reduces errors and risks caused by human factors, improves work efficiency, and also improves the system's intelligent management level, providing strong support for the efficient operation of the laboratory.

[0028] Dynamically adjust equipment operating parameters according to actual operating conditions, such as reducing fan speed when cleanliness requirements are met. This not only saves energy consumption, but also reduces equipment wear and noise, extends equipment life, reduces equipment maintenance costs, and achieves a balanced optimization of economic benefits and system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a step diagram of a flow control method for a pressure difference channel in a clean laboratory of the present application.

[0030] Figure 2 This is a schematic diagram of the spatial structure of a clean laboratory in the present application.

[0031] Figure 3 It is a step diagram for adjusting the first speed and the second speed according to the monitored pressure difference in the delivery channel.

[0032] Figure numerals: 1. Clean conveying channel; 2. Clean buffer cabin; 3. Clean sealing door; 4. Dirty conveying channel; 5. Dirty buffer cabin; 6. Dirty sealing door. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings.

[0034] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] Reference Figure 1 and Figure 2 , the clean laboratory includes the conveying system, the supply and exhaust air and the pressure difference control system, the monitoring and alarm system: The conveying system includes a clean conveying line and a dirty conveying line; the clean conveying line includes a clean conveying channel 1, a clean buffer cabin 2 connected to the clean conveying channel 1, and a clean sealed door 3 located before and after the clean buffer cabin 2. The dirty conveying line includes a dirty conveying channel 4, a dirty buffer cabin 5 connected to the dirty conveying channel 4, and a dirty sealed door 6 located before and after the dirty buffer cabin 5. A blower is provided in the clean conveying channel 1; an exhaust fan is provided in the dirty conveying channel 4. In addition, it also includes a variety of equipment such as vertical lifts, horizontal conveying lines, turning conveying lines, and climbing conveying lines. These equipment are interconnected to form a complete conveying network, which can realize the full-area automatic circulation of the flow device in the experimental facility. Whether it is between clean areas or dirty areas, it can be transported smoothly without manual intervention, which greatly improves work efficiency and reduces labor costs. Enter the transportation demand in the terminal room, and the system will select the optimal path for the flow device after calculation and intelligently allocate the transportation tasks.

[0036] The buffer cabin is located at the position where the clean barrier needs to be crossed. The buffer cabin is equipped with sealed doors at the front and back. Through switch control and monitoring by differential pressure sensors, it can achieve temporary relative isolation from the front and back environments. When the flow device flows between areas of different clean levels, the buffer cabin can effectively reduce air mixing, reduce the risk of cross infection, ensure the stability and independence of the environment in each area, and maintain the high cleanliness standards of the clean area.

[0037] Air supply and exhaust and pressure difference control structure: Each circulation channel is designed as a relatively independent space, and the air supply and outlet are installed with electric control valves. The pressure data is monitored in real time by the pressure difference sensor in the channel, and the system uses PID control technology to accurately adjust the opening of the electric valve. The clean conveying channel 1 maintains a positive pressure difference of +15~+25Pa relative to the outside to prevent the invasion of external polluted air; the dirty conveying channel 4 maintains a negative pressure difference of -5~-15Pa to prevent internal dirty air from leaking into the clean area. Once the channel has a pressure leak and cannot stabilize the pressure, the system immediately triggers an alarm and starts the built-in supply fan or exhaust fan for emergency treatment to ensure the stability of the channel pressure.

[0038] Monitoring and alarm system: Particle detectors are installed in independent areas to monitor air cleanliness 24 hours a day. Once the cleanliness exceeds the set standard, an alarm will be issued in time to ensure that the experimental environment always meets the requirements. High-speed cameras are installed in each transportation section to capture images when objects pass through. When an abnormal displacement of the object position is detected, an alarm will be immediately issued to prevent unexpected situations during transportation. Cameras are set at special points such as turns and climbing to observe whether there is any blockage in real time to ensure smooth transportation routes. Photoelectric sensors at the import and export of equipment can quickly detect omissions in the transportation process by comparing the number of inbound and outbound circulators to ensure the accuracy and completeness of the circulation of experimental equipment.

[0039] This laboratory adopts a personnel and logistics separation design. The logistics delivery channel is set above the experimental space, which cleverly utilizes the space, reduces the occupation of the laboratory floor space, and makes more full use of the internal space of the laboratory.

[0040] The present application embodiment discloses a flow control method for a pressure differential channel in a clean laboratory, referring to Figure 1 and Figure 2 , based on the above laboratory structure design, the method includes the following steps: Obtain the first flow instruction, and close the dirty sealed door 6 according to the first flow instruction to prevent the air in the dirty area from flowing into the clean area; at the same time, open the clean sealed door 3, set the blower to work continuously at the first speed for the first set time; continue to deliver clean air, so that the clean conveying channel 1 maintains a positive pressure difference of +15~+25Pa, effectively preventing external polluted air from invading the clean area. For example, when conducting high-precision biological experiments, once pollutants such as bacteria and viruses that may be carried in the outside air enter the clean area, they may seriously interfere with the experimental results, and this positive pressure difference design provides reliable protection for the experiment.

[0041] Considering the influence of different flow rotor volumes on the air flow and pressure in the channel, the first speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the displacement effect on the air when it moves in the channel, so the required speed of the blower is smaller. Conversely, the smaller the volume of the flow rotor, the smaller the obstruction to the air flow, and the larger the first speed is to maintain a positive pressure difference. Assume that the volume of flow rotor A is 0.5 cubic meters and the volume of flow rotor B is 1 cubic meter. When flow rotor A moves in the channel, due to its small volume, the obstruction to the air flow is relatively small. In order to maintain a positive pressure difference of +15~+25Pa, the first speed of the blower needs to be set to 2000 rpm; and when flow rotor B moves, due to its large volume, the displacement effect on the air when it moves in the channel is relatively small, and the first speed of the blower can be reduced to 1500 rpm. Among them, the same batch is the same size of flow rotor, which is convenient for the system to perform unified parameter setting and control.

[0042] The first setting time is adjusted in a positive correlation with the number of flow rotors; because the more the number of flow rotors, the longer it takes for all of them to pass through the clean conveying channel 1 smoothly, so the first setting time should be extended accordingly; conversely, the fewer the number of flow rotors, the shorter the first setting time. For example, when there are 5 flow rotors that need to pass through the clean conveying channel 1, due to the large number, the time required for all of them to pass smoothly is long, and the first setting time is set to 10 minutes to ensure that each flow rotor can pass safely and stably under a positive pressure difference environment; and when there is only one flow rotor, the first setting time can be shortened to 2 minutes.

[0043] Get the second flow instruction, and close the clean sealed door 3 according to the second flow instruction to prevent the air in the clean area from being polluted by the dirty area. At the same time, open the dirty sealed door 6, and set the exhaust fan to work at the second speed for the second set time; so that the negative pressure difference of -5~-15Pa is maintained in the dirty conveying channel 4 to prevent the internal dirty air from leaking into the clean area. For example, during the experiment, when the experimental results need to be transferred out through the flow meter, such as when transferring out experimental animals that have been raised for a period of time, there may be pollutants in the flow meter, and the negative pressure difference can effectively prevent these pollutants from spreading to other areas with the air, thereby ensuring the overall safety of the laboratory.

[0044] The second speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the second speed; the smaller the volume of the flow rotor, the larger the second speed. For example, for a 0.4 cubic meter flow rotor, the second speed of the exhaust fan is set to 1800 rpm; if the volume of the flow rotor is small, such as a 0.3 cubic meter flow rotor, the second speed is increased to 2200 rpm.

[0045] The second setting time is adjusted in a positive correlation with the number of the circulators; the more the number of the circulators, the longer the second setting time; the fewer the number of the circulators, the shorter the second setting time. When there are 8 circulators that need to pass through the dirty conveying channel 4, the second setting time is set to 12 minutes; when there are only 2 circulators, the second setting time can be shortened to 4 minutes.

[0046] Get the cleaning instructions, and start the disinfection operation on the clean conveyor line and the dirty conveyor line according to the cleaning instructions. Since the clean conveyor line and the dirty conveyor line carry clean items and dirty items respectively during the experiment, in order to prevent cross contamination and ensure the accuracy and safety of subsequent experiments. The disinfection operation covers all conveyor line related parts such as the clean conveying channel 1, clean buffer cabin 2, clean sealed door 3, and dirty conveying channel 4, dirty buffer cabin 5, dirty sealed door 6, etc. Professional disinfection equipment and disinfection reagents that meet laboratory standards are used. The operation is carried out in accordance with the prescribed disinfection process and time to ensure the cleanliness and hygiene of the entire conveying system. For example, for biological laboratories, high-efficiency disinfectants such as hydrogen peroxide will be used for disinfection. The disinfection time is strictly carried out in accordance with the prescribed process and generally lasts for more than 30 minutes to ensure the cleanliness and hygiene of the entire conveying system and to be fully prepared for the next experimental flow.

[0047] By setting up clean conveying lines and dirty conveying lines, and equipping them with corresponding sealing doors, fans and other facilities, during the circulation of the rotator, according to different circulation instructions, the opening and closing of the clean sealing door 3 and the dirty sealing door 6, as well as the working status of the blower and the exhaust fan can be reasonably controlled, which can effectively avoid the influence of the polluted experimental space on the non-polluted experimental space, better ensure the cleanliness requirements of the experimental space, and greatly reduce the pollution risk caused by the circulation of the rotator between different experimental spaces. According to the anti-correlation adjustment of the fan speed according to the size of the rotator, and the positive correlation adjustment of the fan working time according to the number of rotators, this flexible adjustment method can more accurately match the circulation requirements of the rotator under different circumstances. For large rotators, reduce the fan speed to avoid unnecessary disturbances and potential pollution caused by excessive wind speed; for a large number of rotators, extend the fan working time to ensure sufficient air replacement and purification effects, thereby further improving the cleanliness control level during the circulation process. After obtaining the cleaning instructions, the disinfection operation is started on the clean conveyor line and the dirty conveyor line. This measure can regularly clean and disinfect the conveyor line comprehensively, effectively remove pollutants that may remain during the circulation process, maintain the clean state of the conveyor line, and provide a relatively clean and safe environment for subsequent circulation work, thus ensuring the overall operation quality of the clean laboratory and the accuracy of the experimental results.

[0048] Reference Figure 3Based on the fact that a first differential pressure sensor is provided in the clean conveying channel 1 and a second differential pressure sensor is provided in the dirty conveying channel 4, the method further includes the following steps: When the blower is set to operate at the first speed for a first set time, the first differential pressure is obtained based on the first differential pressure sensor. For example, during an experimental material conveying process, the blower operates at the first speed of 1800 rpm, and the first differential pressure sensor measures that the first differential pressure at this time is 20 Pa.

[0049] The difference between the first pressure difference and the preset first threshold is calculated as the first difference; if the first difference is greater than the set value, a first warning prompt is issued; otherwise, the first speed is adjusted according to the anti-correlation of the first difference; the larger the first difference, the smaller the first speed; the smaller the first difference, the larger the first speed.

[0050] Assume that the preset first threshold is 20Pa. In the above example, the first difference is 20Pa-20Pa=0. Assume that the set value is 3, and compare the first difference with the preset first threshold. If the first difference is greater than the set value, for example, when the first pressure difference is 24Pa, the first difference is 24Pa-20Pa=4, and a first warning prompt will be issued. This warning prompt is displayed on the laboratory monitoring system in the form of an audible and visual alarm, reminding the staff that the pressure difference of the clean conveying channel 1 has fluctuated greatly and needs attention. If the first difference is not greater than the set value, the system will adjust the size of the first speed in an anti-correlated manner according to the first difference. Specifically, the larger the first difference, the smaller the first speed; the smaller the first difference, the larger the first speed. For example, when the first pressure difference is 18Pa, the first difference is 20Pa-18Pa=2. At this time, in order to make the pressure difference closer to the preset threshold, the system will appropriately increase the first speed; if the first pressure difference is 22Pa, the first difference is 22Pa-20Pa=2, the system will appropriately reduce the first speed to maintain the stability of the pressure difference.

[0051] When the exhaust fan is set to operate at the second speed for a second set time, the second differential pressure is obtained based on the second differential pressure sensor. For example, during a dirty experimental equipment recovery process, the exhaust fan operates at the second speed of 2000 rpm, and the second differential pressure sensor measures a second differential pressure of -10Pa.

[0052] The difference between the calculated second pressure difference and the preset second threshold is the second difference; if the second difference is greater than the set value, a second warning prompt is issued; otherwise, the second speed is adjusted according to the anti-correlation of the second difference; the larger the second difference, the smaller the second speed; the smaller the second difference, the larger the second speed.

[0053] Assume that the preset second threshold is -10 Pa. In this example, the second difference is -10 Pa-(-10 Pa)=0.

[0054] Assuming that the set value is 2, after comparison, if the second difference is greater than the set value, for example, when the second pressure difference is -7Pa, the second difference is -7Pa-(-10Pa)=3, then a second warning prompt will be issued to remind the staff that the negative pressure difference of the dirty conveying channel 4 is abnormal, and there may be a risk of dirty air leakage.

[0055] If the second difference is not greater than the set value, the system will adjust the second speed in an anti-correlated manner according to the second difference. For example, when the second pressure difference is -12Pa, the second difference is -10Pa-(-12Pa)=2, and the system will appropriately reduce the second speed; if the second pressure difference is -8Pa, the second difference is -8Pa-(-10Pa)=2, and the system will appropriately increase the second speed, thereby ensuring that the negative pressure difference of the dirty conveying channel 4 is stable within a reasonable range and preventing dirty air from leaking into the clean area.

[0056] The first differential pressure sensor and the second differential pressure sensor are respectively arranged in the clean conveying channel 1 and the dirty conveying channel 4, so that the differential pressure data in the channel can be obtained in real time. The system can dynamically adjust the fan speed based on the actual differential pressure, rather than relying solely on the preset adjustment method based on the volume and number of the flow device. The fan speed is adjusted inversely according to the difference between the obtained differential pressure and the preset threshold value, so that the adjustment is more accurate. When the difference is large, it means that the pressure situation in the current channel is relatively good. Properly reducing the fan speed can save energy and reduce the noise and equipment loss generated by the fan operation while meeting the cleanliness requirements; when the difference is small, the fan speed is increased to better maintain the air flow and pressure balance in the channel to ensure that the cleanliness of the experimental space is not affected. When the calculated first difference or the second difference is greater than the set value, an early warning prompt is issued. The operator can promptly understand the abnormal conditions that may exist during the operation of the system. For example, an excessively large differential pressure difference may mean that the sealing effect of the sealing door is poor, the fan fails, or other problems that affect the pressure balance in the channel. Through early warning prompts, operators can quickly take appropriate measures to investigate and repair, avoiding the increased risk of contamination in the experimental space due to potential problems, thereby enhancing the reliability and safety of the entire clean laboratory pressure difference channel flow control system. In the actual operation process, the working conditions of the clean laboratory may be affected by many factors, such as the operation of experimental equipment, the entry and exit of personnel, etc., all of which may cause the pressure difference in the channel to change. By monitoring the pressure difference in real time and adjusting the fan speed according to the difference, the system can better adapt to these complex and changeable working conditions, maintain a stable operating state, and ensure that the risk of contamination in the flow process of the flow device can be effectively reduced under different circumstances, providing a strong guarantee for the normal operation of the clean laboratory.

[0057] The clean conveying channel 1 includes a first clean branch and a second clean branch, and a clean sealing door 3 is provided on both the first clean branch and the second clean branch. The method further includes the following steps: Obtain a third flow transfer instruction, close the dirty sealing door 6 according to the third flow transfer instruction, open the clean sealing door 3 corresponding to the first clean branch, and close the clean sealing door 3 and the dirty sealing door 6 on the second clean branch.

[0058] The blower is set to operate at the third speed for a third set time. For example, for some experiments that require high airflow stability, the blower will operate at a relatively low third speed, such as 1500 rpm, and the duration is set to 5 minutes to create a stable clean airflow environment to prevent interference with experimental items due to excessively fast or strong airflow.

[0059] During the third set time, the opening and closing degree and opening and closing time of the clean sealing door 3 are adjusted according to the running speed and position information of the circulator.

[0060] When the distance between the flow device and the clean sealed door 3 corresponding to the first clean branch is less than the set value, the clean sealed door 3 is gradually opened at the first set speed. When the distance between the flow device and the clean sealed door 3 corresponding to the first clean branch is less than the set value, assuming that the set value is 0.5 meters, in order to ensure that the flow device can enter smoothly, the system will gradually open the clean sealed door 3 at the first set speed. For example, when the flow device approaches to 30.8 meters from the clean sealed door, the clean sealed door 3 will start to open slowly at the first set speed, such as 0.1 meters per second. This speed is relatively slow in order to avoid airflow disturbances caused by the sudden opening of the door, which affects the environmental stability in the clean area.

[0061] After the flow device passes through the clean sealed door 3, the clean sealed door 3 is closed at the second set speed; wherein the first set speed is less than the second set speed. After the flow device successfully passes through the clean sealed door 3, in order to restore the sealing of the clean area as soon as possible and prevent external pollution from entering, the system will close the clean sealed door 3 at the second set speed. The second set speed here is greater than the first set speed, and the second set speed is, for example, 0.3 m / s, because the passage of the flow device has been completed at this time, and the sealed door needs to be closed quickly. For example, at the moment when the flow device completely passes through the clean sealed door 3, the clean sealed door 3 will be closed at a relatively fast speed of 0.3 m / s, re-isolating the clean area from the external environment to ensure that the high cleanliness in the experimental area is not affected.

[0062] Different branches of the clean conveying channel 1 are controlled separately, and the clean sealed door 3 of a specific branch can be accurately opened and closed according to the actual flow demand, avoiding unnecessary air circulation and potential pollution. For example, when the flower only needs to be transported to the experimental space corresponding to the first clean branch, the sealed door of the second clean branch is closed, which effectively reduces the contact area between the clean space and the outside world and reduces the risk of pollution. The opening and closing degree and time of the clean sealed door 3 are dynamically adjusted according to the running speed and position information of the flower, so as to achieve efficient connection of the flow process. Prepare enough passage space in advance to ensure the smooth passage of the flower, and avoid the flow jam caused by the untimely opening or insufficient opening of the sealed door. At the same time, the sealed door is quickly closed after the flower passes, which reduces the time window for the clean space to be contaminated and improves the safety of the entire system. When the flower stops abnormally, timely adjusting the opening and closing degree of the sealed door helps to maintain the pressure stability in the clean conveying channel 1. A stable pressure environment is crucial to maintaining the cleanliness of the clean space, which can prevent the diffusion of pollutants caused by pressure fluctuations, ensure the normal operation of the clean laboratory, and provide a reliable environmental foundation for the smooth development of the experiment.

[0063] The steps of obtaining the first transfer instruction include: Based on multiple infrared sensors placed in sequence set at the entrance of the clean conveying channel 1, when the flow device passes through the multiple infrared sensors placed in sequence, the first response sequence of the infrared sensors is obtained; according to the first response sequence, the corresponding first flow instruction is matched.

[0064] For example, starting from the entrance, they are marked as infrared sensor a, infrared sensor b, infrared sensor c, etc. When the flower starts to enter the clean conveying channel 1, it will pass through these infrared sensors in sequence. Every time the flower passes an infrared sensor, the sensor will generate a response signal. For example, when a small experimental sample flower enters the clean conveying channel 1, infrared sensor a is triggered first, and the sensor will immediately send a signal. Then the flower continues to move forward and triggers infrared sensor b and infrared sensor c in sequence. The order in which these sensors send signals constitutes the first response sequence. Assume that in this example, the first response sequence is [infrared sensor a, infrared sensor b, infrared sensor c]. The system matches in the pre-set instruction library according to this first response sequence. Different response sequences correspond to different flow requirements and experimental operations, so the corresponding first flow instructions need to be accurately matched. For example, the above-mentioned [infrared sensor a, infrared sensor b, infrared sensor c] response sequence corresponds to guiding the flower to the first branch of the clean conveying channel 1 so as to enter the corresponding experimental space for specific sample analysis operations. Therefore, the system will compare the first response sequence with the stored instruction information, and finally match the corresponding first flow instruction, which contains detailed information such as the target position of the flow device and the required conveying speed. For example, in a biological sample experiment, if the first response sequence is [infrared sensor a, infrared sensor b, infrared sensor c], the matched first flow instruction is to guide the biological sample flow device to the first branch of the clean conveying channel 1 and transport it at a speed of 1 m / s.

[0065] The steps of obtaining the second transfer instruction include: Based on the multiple pressure sensors placed in sequence at the entrance of the dirty conveying channel 4, when the flower passes through the multiple pressure sensors placed in sequence, the second response sequence of the pressure sensors is obtained; according to the second response sequence, the corresponding second flow instruction is matched. Multiple pressure sensors placed in sequence are closely arranged and numbered as pressure sensor A, pressure sensor B, pressure sensor C, etc. from the entrance in a certain logical order. The main function of the pressure sensor is to provide the system with the position and movement information of the flower by sensing the pressure changes generated when the flower passes. When the flower enters the dirty conveying channel 4, it will exert pressure on the pressure sensors passing by, causing these pressure sensors to respond in sequence. For example, when a flower to be transferred out enters the dirty conveying channel 4, pressure sensor A will be triggered first to record a pressure change signal, and then pressure sensor B and pressure sensor C will be triggered. The order in which these pressure sensors generate responses constitutes the second response sequence. Assume that in this case, the second response sequence is [pressure sensor A, pressure sensor B, pressure sensor C]. The system will search for the matching second flow instruction in the corresponding instruction library according to the second response sequence. Different second response sequences reflect different flow requirements, especially for operations in the dirty conveying channel 4, involving the clean treatment of wastes, etc.

[0066] A plurality of infrared sensors arranged in sequence are set at the entrance of the clean conveying channel 1. By utilizing the signal changes caused by the objects blocking the infrared light, the position, speed, direction and other information of the flow device when entering can be accurately captured, forming a unique first response sequence. Similarly, the pressure sensor set at the entrance of the dirty conveying channel 4 obtains the second response sequence by detecting the pressure changes caused by the flow device passing through. Matching the corresponding flow instructions based on these precise response sequences greatly improves the accuracy of instruction acquisition, avoids equipment misoperation or transportation confusion caused by instruction errors, and ensures that the flow device can accurately operate in different conveying channels according to the predetermined process and path.

[0067] A particle detector is configured in the experimental space, and the method further includes: Real-time acquisition of cleanliness data from particle detectors; particle detectors in the experimental space work continuously to acquire cleanliness data in real time. These cleanliness data reflect the number and size distribution of particles in the air in the experimental space, and are important indicators for measuring laboratory cleanliness. For example, the particle detector will sample and analyze the air in the experimental space once per second, detecting the number and size of pollutants including but not limited to dust particles and microbial particles, and converting this information into quantifiable data. For example, if 100 dust particles of 0.5 microns or larger and 5 microbial particles are detected per cubic meter of air in the experimental space, these data will be transmitted to the laboratory's control system in real time as a basis for judging the cleanliness of the experimental space.

[0068] Monitor the changing trend of cleanliness in the experimental space. This monitoring process is based on continuous cleanliness data. Through time series analysis and data processing technology, it is determined whether the cleanliness is in an upward, downward or relatively stable state. When the cleanliness is monitored to be in a downward state and the decline rate exceeds the set decline threshold, the speed of the supply fan and the exhaust fan is adjusted according to the cleanliness. For example, in the past minute, through the analysis of the particle detector data, it was found that the cleanliness data showed a trend of gradually increasing from 100 dust particles of 0.5 microns and above and 5 microbial particles per cubic meter to 120 dust particles and 8 microbial particles, indicating that the cleanliness is in a downward state. When the cleanliness is monitored to be in a downward state, the system will further calculate the decline rate of the cleanliness. For example, if the number of dust particles has increased from 80 to 150 per cubic meter in the past 5 minutes, the system will calculate the rate of cleanliness decline based on these data. If the decline rate exceeds the set decline threshold, assuming that the decline threshold is an increase of 10 dust particles per cubic meter per minute, corresponding adjustment measures need to be taken.

[0069] When the cleanliness is lower, in order to quickly restore the cleanliness of the experimental space, the system will increase the speed of the supply fan and exhaust fan. For example, if the cleanliness in the experimental space drops to 200 dust particles of 0.5 microns and above and 10 microbial particles per cubic meter, the speed of the supply fan will be increased from 1500 rpm to 2000 rpm, and the speed of the exhaust fan will be increased from 1200 rpm to 1600 rpm to enhance air circulation and replacement, discharge polluted air, and introduce more filtered clean air, thereby improving the cleanliness of the experimental space.

[0070] On the contrary, when the cleanliness is high, the speed of the supply and exhaust fans will be reduced accordingly. For example, when the cleanliness data shows that there are only 50 dust particles of 0.5 microns and above and 2 microbial particles per cubic meter, the speed of the supply fan is reduced to 1000 rpm and the speed of the exhaust fan is reduced to 800 rpm to maintain a relatively stable and energy-saving operation state and avoid unnecessary interference to the experimental environment caused by excessive ventilation.

[0071] Acquiring the cleanliness data of the particle detector in real time and monitoring its changing trend can timely detect abnormal changes in the cleanliness in the experimental space. When the cleanliness decreases faster than the set threshold, the speed of the air supply and exhaust fans is adjusted according to the cleanliness level. This precise dynamic control mechanism can quickly and effectively respond to fluctuations in cleanliness. When the cleanliness is low, increase the speed of the air supply and exhaust fans to speed up the circulation and replacement of air, forcefully discharge pollutants, and quickly improve the cleanliness; when the cleanliness is high, reduce the fan speed to avoid excessive ventilation causing energy waste and unnecessary equipment loss. At the same time, it also maintains a relatively stable microenvironment in the experimental space, providing a reliable clean environment guarantee for the smooth progress of the experiment.

[0072] A high-speed camera is provided in the experimental space to obtain image information of the transparent clean conveying channel 1 and the dirty conveying channel 4; a blowing device with adjustable speed and angle is provided on both side walls of the channel, and the method further includes: When a flowmeter passes through the clean delivery channel 1 or the dirty delivery channel 4, the image information in the experimental space is obtained as a channel picture. For example, in an automated biological sample delivery process, when a flowmeter carrying an important biological sample enters the clean delivery channel 1, a high-speed camera shoots at a speed of 30 frames per second to capture the real-time dynamics of the flowmeter in the channel, thereby generating a series of clear channel pictures. These channel pictures contain rich details, not only the appearance and outline of the flowmeter can be seen, but also the boundary and internal structure of the delivery channel can be clearly seen.

[0073] Identify the flow device and the conveying channel from the channel image. For example, using the deep learning algorithm, the system can extract the shape, color, texture and other features of the flow device from the channel image, and can also accurately identify the boundaries, shapes and various marks in the clean conveying channel 1 or the dirty conveying channel 4. According to the position information of the flow device and the conveying channel, combined with the preset standard position, the position offset and offset angle of the flow device are calculated; assuming that in an ideal state, the flow device should be in the center of the clean conveying channel 1, and its long side should be parallel to the axis of the conveying channel, which is the preset standard position. However, the actual position of the flow device identified from the channel image may be deviated. For example, it is found through calculation that the center position of the flow device is offset to the left by 5 cm relative to the center position of the channel, and this 5 cm is the position offset. At the same time, if the long side of the flow device forms an angle of 10 degrees with the axis of the conveying channel, this 10 degrees is the offset angle. The system will also calculate the conveying direction of the flow device based on the front and rear position changes of the flow device in the channel image. For example, by analyzing several consecutive frames of channel images, it is found that the position of the flow device moves from one end of the channel to the other end at consecutive time points. From this, it can be determined that the flow device is transporting from left to right along the channel.

[0074] If the position offset exceeds the preset error range, an alarm signal is issued. Assuming the preset position offset error range is 3 cm), the system will issue an alarm signal. In the above example, since the position offset is 5 cm, which exceeds the error range, the system will trigger an alarm.

[0075] The speed of the blowing device is adjusted according to the position offset to correct the position of the flow rotor. The larger the position offset, the faster the speed of the blowing device; the smaller the position offset, the slower the speed of the blowing device. For example, when the position offset is 5 cm, the system will adjust the speed of the blowing device to 2000 rpm to generate a larger wind force to push the flow rotor back to the correct position; and when the position offset is 1 cm, the speed of the blowing device only needs to be adjusted to 500 rpm to gently fine-tune the position of the flow rotor.

[0076] Identify the blowing device from the channel image; calculate the blowing direction of the blowing device based on the offset angle, the position information of the blowing device in the channel image, and the conveying direction of the flow conveyor. From the channel image, the system will further identify the blowing device. Using image recognition technology, the system can find the blowing device from the complex channel image based on its unique shape, color or logo, thereby determining the position of the blowing device in the channel.

[0077] Based on the offset angle, the position information of the blowing device in the channel image, and the conveying direction of the flow conveyor, the system will accurately calculate the blowing direction of the blowing device. For example, when the flow conveyor is offset to the left by 5 cm and the offset angle is 10 degrees, and the conveying direction is from left to right, the system will calculate that the blowing device should blow to the right front to provide a thrust to the right front to return the flow conveyor to the correct position. In addition, as the position of the flow conveyor is gradually corrected, the system will dynamically adjust the blowing direction and speed of the blowing device according to the real-time offset and offset angle to ensure that the flow conveyor can move smoothly along the predetermined conveying path.

[0078] By using the high-speed camera in the experimental space to obtain channel image information, the position of the flow rotor and the conveying channel can be accurately identified. By calculating the position offset, offset angle and conveying direction of the flow rotor, the speed and blowing direction of the blowing device can be adjusted in a targeted manner. This precise calculation and control mechanism enables the blowing device to act on the flow rotor with just the right wind force and angle, correct its position deviation in time, and ensure that the flow rotor always maintains the correct running trajectory in the conveying channel, greatly improving the accuracy and stability of the circulation process, reducing collisions and damages that may be caused by the displacement of the flow rotor, and ensuring the safe transportation of experimental items. When it is detected that the position offset of the flow rotor exceeds the preset error range, the system immediately issues an alarm signal. This early warning mechanism enables staff to quickly know the abnormal situation during transportation and take corresponding measures to deal with it in time. For example, staff can check whether there is a fault in the conveying equipment in time, or adjust the loading method of the flow rotor, etc., to avoid more serious problems caused by the continuous displacement of the flow rotor, ensure the normal operation of the clean laboratory transportation system, and reduce the risk of experimental interruption. The entire technical solution realizes a fully automated process from image acquisition, information recognition, data analysis to equipment control. The high-speed camera automatically acquires images, automatically identifies and calculates relevant parameters through algorithms, and then automatically controls the blowing device to make adjustments without excessive human intervention.

[0079] A camera is installed at a set position in the conveying space to obtain image information of the set position of the transparent clean conveying channel 1 and the dirty conveying channel 4. The set position includes turning, climbing or large-angle corners; the method includes the following steps: The continuous frame images of a specific position acquired by the camera are monitoring images; for example, in this experimental environment, the camera shoots the clean conveying channel 1 and the dirty conveying channel 4 at a frequency of 25 frames per second.

[0080] Identify the flow controller from the monitoring image; through image recognition technology, the system can accurately identify the flow controller from the monitoring image. This process involves image recognition algorithms, which will separate the flow controller from the image background based on its unique shape, color, texture or logo. For example, assuming that the flow controller is a container with a specific color mark, the system will accurately locate the outline of each flow controller in the monitoring image based on its unique blue mark, distinguishing it from other parts in the channel. Even in the case of light changes or partial occlusion, the system can find the exact position and shape of the flow controller through algorithm optimization and feature matching.

[0081] The distance between adjacent rotators is calculated as the adjacent distance, and the change in the adjacent distance is calculated; taking the clean conveying channel 1 as an example, when multiple rotators are arranged in sequence in the channel, the system will analyze the monitoring image and calculate the straight-line distance between adjacent rotators. Assuming that in a frame of monitoring image, there are three rotators A, B and C arranged in sequence, the system will measure the distance between rotator A and rotator B, and the distance between rotator B and rotator C. Through calculation, it is found that the distance between rotators A and B is 30 cm, and the distance between rotators B and C is 32 cm. By comparing the monitoring images of different frames, it is found that the distance between rotators A and B has changed from the initial 30 cm to 25 cm, so the change in the adjacent distance is 5 cm.

[0082] If the adjacent distance is less than the set distance value, an early warning prompt will be issued.

[0083] If the adjacent distance is less than the set distance value, the system will issue an early warning prompt. Assuming the set distance value is 20 cm, when the distance between adjacent flowers drops from 25 cm in the above example to 18 cm, it indicates that the distance between the flowers is too close and may collide or interfere with each other, thus affecting the safety of experimental items and the smooth progress of the experiment. At this time, the system will issue an early warning prompt, display a red warning message on the laboratory monitoring interface, and trigger a sound alarm to remind the operator to pay attention to avoid possible dangerous situations.

[0084] If the change in adjacent distances is greater than or equal to the set change, the system will also issue an early warning. Continuing with the above example, if the set change is 4 cm, and the distance between adjacent flow devices A and B changes from 30 cm to 25 cm, the change is 5 cm, which exceeds the set 4 cm. This means that the distance change between adjacent flow devices is abnormal, which may be caused by some unstable factors and will also trigger the system's early warning. This may affect the orderly transportation of experimental items or even damage the experimental items. In this case, the system will issue an early warning to remind the operator to check whether there are any abnormalities in the conveying system, such as whether there is a mechanical failure or a problem with the control program.

[0085] If the change in the adjacent distances is greater than or equal to the set change, an early warning prompt will be issued.

[0086] The camera is used to obtain images of large-angle points such as turns or slopes, and to identify the flowmeters. The distance between adjacent flowmeters and their changes are calculated, and the operating status of the flowmeters in the conveying channel can be monitored in real time. When the adjacent distance is less than the set distance value, an early warning prompt is issued, which helps to avoid blockage and collision accidents between flowmeters. In a clean laboratory, the flowmeter carries important experimental samples or equipment. Once a collision occurs, it will not only damage the flowmeter itself, but also cause contamination of experimental samples or equipment failure, affecting the normal progress of the experiment. Early warning allows staff to take timely measures, such as adjusting the conveying speed or checking the operating status of the equipment, to ensure the safety of the transportation process.

[0087] Photoelectric sensors are provided at the entrance of the clean conveying channel 1 and the exit of the dirty conveying channel 4. The method further comprises the following steps: The number of times the photoelectric sensor signal at the entrance of the clean conveying channel 1 changes within the set time period is the first number; the number of times the photoelectric sensor signal at the exit of the dirty conveying channel 4 changes is the second number.

[0088] The difference between the first quantity and the second quantity is calculated as the period difference; if the period difference is greater than the set difference, an early warning prompt is issued. Within the set time period, for example, the set time period is set to 1 week, the system will count the number of times the photoelectric sensor signal at the entrance of the clean conveying channel 1 changes, and record it as the first quantity. The working principle of the photoelectric sensor is to detect whether an object passes through its light path. When an object passes through, it will cause light obstruction, thereby generating a signal change. For example, in the process of conveying a biological sample, each time a flow device containing a biological sample passes through the entrance of the clean conveying channel 1, the photoelectric sensor will detect a change in the signal. Assuming that within this 1-week time period, 50 flow devices containing different biological samples pass through the entrance, then the first number is 50 times.

[0089] Also within this set time period of one week, the system will count the number of times the photoelectric sensor signal changes at the exit of the dirty conveying channel 4, and record it as the second number. When a flow device leaves the exit of the dirty conveying channel 4, the photoelectric sensor at this position will produce a signal change. If 40 flow devices containing experimental waste leave the exit within this one week, then the second number is 40 times.

[0090] If the cycle difference is greater than the set difference, assuming the set difference is 5, the system will issue an early warning. In the above example, since the calculated cycle difference is 10, which is greater than the set difference of 5, the system will issue an early warning. This early warning can be presented in many forms, such as a striking red warning box popping up on the laboratory monitoring system interface, displaying the message "The number of conveyed items does not match, please check the conveying system!", and triggering an alarm to attract the attention of staff.

[0091] This situation suggests that an abnormality has occurred during the circulation of the experimental items. For example, it may be that some of the flow devices in the clean conveying channel 1 failed to be successfully transported to the dirty conveying channel 4 for some reason, resulting in more flow devices entering the entrance of the clean conveying channel 1 than leaving the exit of the dirty conveying channel 4. This may be due to a blockage in a certain part of the conveying system, causing the flow devices to stagnate midway; or due to a failure in the control system, causing errors in the transportation path of some flow devices; or it may be because the experimental items were damaged or lost during the transportation process and failed to reach the exit of the dirty conveying channel 4 normally.

[0092] Photoelectric sensors are set at the entrance of the clean conveying channel 1 and the exit of the dirty conveying channel 4, and the number of signal changes within a set time period is counted, so that the number of passes of the flow device at these two key positions can be accurately grasped. By calculating the difference between the first number and the second number, an early warning prompt is issued once the cycle difference is greater than the set difference, which enables the system to promptly detect abnormal situations such as item loss, blockage or equipment failure that may occur during transportation.

[0093] An embodiment of the present application further discloses a flow control system for a pressure differential channel in a clean laboratory, including a processor, wherein the processor executes the steps of the flow control method for a pressure differential channel in a clean laboratory as described in any one of the above.

[0094] The embodiment of the present application further discloses a storage medium, in which a program is stored. When the program is executed by a processor, the steps of the flow control method for the pressure difference channel of a clean laboratory described in any one of the above are implemented.

[0095] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A flow control method for a pressure differential channel in a clean laboratory, characterized in that: Based on a clean conveying line and a dirty conveying line; the clean conveying line comprises a clean conveying channel (1), a clean buffer cabin (2) connected to the clean conveying channel (1), and a clean sealing door (3) located before and after the clean buffer cabin (2); the dirty conveying line comprises a dirty conveying channel (4), a dirty buffer cabin (5) connected to the dirty conveying channel (4), and a dirty sealing door (6) located before and after the dirty buffer cabin (5); a blower is arranged in the clean conveying channel (1); and an exhaust fan is arranged in the dirty conveying channel (4); The method comprises the following steps: Obtaining a first circulation instruction, closing the dirty sealing door (6) and opening the clean sealing door (3) according to the first circulation instruction, and setting the blower to operate continuously at a first speed for a first set time; The first rotation speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the first rotation speed; the smaller the volume of the flow rotor, the larger the first rotation speed; adjusting the first set time in positive correlation with the number of the circulators; The more the number of the circulators is, the longer the first setting time is; the fewer the number of the circulators is, the shorter the first setting time is; Obtaining a second circulation instruction, closing the clean sealing door (3) and opening the dirty sealing door (6) according to the second circulation instruction, and setting the exhaust fan to operate continuously at a second speed for a second set time; The second speed is adjusted inversely according to the volume of the flow rotor; the larger the volume of the flow rotor, the smaller the second speed; the smaller the volume of the flow rotor, the larger the second speed; adjusting the second set time in positive correlation with the number of the circulators; The more the number of the circulators is, the longer the second set time is; the fewer the number of the circulators is, the shorter the second set time is; A cleaning instruction is obtained, and a disinfection operation is started on the clean conveying line and the dirty conveying line according to the cleaning instruction.

2. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: Based on the fact that a first differential pressure sensor is arranged in the clean conveying channel (1) and a second differential pressure sensor is arranged in the dirty conveying channel (4), the method further comprises the following steps: When the blower is set to operate at a first speed for a first set time, a first pressure difference is acquired based on the first pressure difference sensor; Calculating the difference between the first pressure difference and a preset first threshold as a first difference; if the first difference is greater than a set value, issuing a first warning prompt; otherwise, adjusting the first rotation speed in an anti-correlation manner according to the first difference; The larger the first difference is, the smaller the first rotation speed is; The smaller the first difference is, the greater the first rotation speed is; When the exhaust fan is set to operate at a second speed for a second set time, a second pressure difference is obtained based on the second pressure difference sensor; Calculating the difference between the second pressure difference and a preset second threshold as a second difference; if the second difference is greater than a set value, issuing a second warning prompt; otherwise, adjusting the magnitude of the second rotation speed in an anti-correlation manner according to the second difference; The larger the second difference is, the smaller the second rotational speed is; and the smaller the second difference is, the larger the second rotational speed is.

3. The flow control method of the pressure differential channel of the clean laboratory according to claim 2 is characterized in that: The clean conveying channel (1) comprises a first clean branch and a second clean branch, the first clean branch and the second clean branch are both provided with the clean sealing door (3), and the method further comprises the following steps: Obtaining a third flow transfer instruction, closing the dirty sealed door (6) according to the third flow transfer instruction, opening the clean sealed door (3) corresponding to the first clean branch, and closing the clean sealed door (3) and the dirty sealed door (6) on the second clean branch; Setting the blower to operate at a third speed for a third set time; During the third set time, the opening and closing degree and opening and closing time of the clean sealing door (3) are adjusted according to the running speed and position information of the circulator; When the distance between the flow device and the clean sealing door (3) corresponding to the first clean branch is less than a set value, gradually opening the clean sealing door (3) at a first set speed; After the flow device passes through the clean sealed door (3), the clean sealed door (3) is closed at a second set speed; wherein the first set speed is less than the second set speed.

4. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: The step of obtaining the first transfer instruction comprises: Based on a plurality of infrared sensors arranged in sequence at the entrance of the clean conveying channel (1), when the flow device passes through the plurality of infrared sensors arranged in sequence, a first response sequence of the infrared sensors is obtained; and according to the first response sequence, a corresponding first flow instruction is matched; The step of obtaining the second transfer instruction comprises: Based on a plurality of pressure sensors arranged in sequence at the entrance of the dirt conveying channel (4), when the flow device passes through the plurality of pressure sensors arranged in sequence, a second response sequence of the pressure sensors is obtained; and according to the second response sequence, a corresponding second flow instruction is matched.

5. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: A particle detector is configured in the experimental space, and the method further includes: Obtain cleanliness data of particle detectors in real time; Monitor the change trend of the cleanliness in the experimental space. When it is detected that the cleanliness is in a decreasing state and the decreasing speed exceeds the set decreasing threshold, adjust the speed of the air supply fan and the exhaust fan according to the cleanliness; When the cleanliness is lower, the rotation speed of the air supply fan and the exhaust fan is higher; The higher the cleanliness level, the smaller the rotation speeds of the air supply fan and the exhaust fan.

6. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: A high-speed camera is provided in the experimental space for acquiring image information of the transparent clean conveying channel (1) and the dirty conveying channel (4), and a blowing device with adjustable speed and angle is provided on both side walls of the channel. The method further comprises: When the flow device passes through the clean conveying channel (1) or the dirty conveying channel (4), image information in the experimental space is obtained as a channel picture; Identify the flow circulator and the conveying channel from the channel image, calculate the position offset and the offset angle of the flow circulator according to the position information of the flow circulator and the conveying channel and the preset standard position; and calculate the conveying direction of the flow circulator; If the position offset exceeds a preset error range, an alarm signal is issued; The rotation speed of the blowing device is adjusted according to the position offset, wherein the larger the position offset, the larger the rotation speed of the blowing device; and the smaller the position offset, the smaller the rotation speed of the blowing device; The blowing device is identified from the channel image; and the blowing direction of the blowing device is calculated according to the offset angle, the position information of the blowing device in the channel image, and the conveying direction of the flow device.

7. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: A camera is installed at a set position in the conveying space, and is used to obtain image information of the set object positions of the transparent clean conveying channel (1) and the dirty conveying channel (4). The method comprises the following steps: The continuous frame images at a specific position are acquired based on the camera as monitoring images; identifying the flow device from the monitoring image; Calculating the distance between adjacent flow devices as an adjacent distance, and calculating the change in the adjacent distance; If the adjacent distance is less than the set distance value, an early warning prompt is issued; If the change in the adjacent distance is greater than or equal to the set change, an early warning prompt is issued.

8. The flow control method of the pressure differential channel of the clean laboratory according to claim 1 is characterized in that: Photoelectric sensors are provided at the entrance of the clean conveying channel (1) and the exit of the dirty conveying channel (4), and the method further comprises the following steps: The number of times the photoelectric sensor signal at the entrance of the clean conveying channel (1) changes within a set time period is counted as a first number; the number of times the photoelectric sensor signal at the exit of the dirty conveying channel (4) changes is a second number; The difference between the first quantity and the second quantity is calculated as a period difference; if the period difference is greater than a set difference, an early warning prompt is issued.

9. A flow control system for a pressure differential channel in a clean laboratory, characterized in that: It comprises a processor, in which the steps of the flow control method of the pressure difference channel of the clean laboratory as described in any one of claims 1-8 are executed.

10. A storage medium, characterized in that: The medium stores a program, and when the program is executed by the processor, the steps of the flow control method for the pressure difference channel of a clean laboratory described in any one of claims 1 to 8 are implemented.

Images