CN119668314A

CN119668314A - Flow control method, system and storage medium for pressure differential channel in clean laboratory

Info

Publication number: CN119668314A
Application number: CN202510163329.8A
Authority: CN
Inventors: 郑海峰; 胡国荣; 侯丽; 胡曦
Original assignee: Shanghai Chuntian Laboratory Equipment Co ltd
Current assignee: Shanghai Chuntian Laboratory Equipment Co ltd
Priority date: 2025-02-14
Filing date: 2025-02-14
Publication date: 2025-03-21
Anticipated expiration: 2045-02-14
Also published as: CN119668314B

Abstract

The present application relates to the technical field of air purification and ventilation, and discloses a flow control method, system and storage medium for a pressure difference channel of a clean laboratory. The method is based on two conveyor lines, clean and dirty. Each line includes a conveyor channel, a buffer cabin and a sealed door. A blower and an exhaust fan are respectively provided in the channel. By obtaining the flow instruction, the fan speed and working time are adjusted according to the volume and number of the circulator, and the conveyor line can be disinfected according to the cleaning instruction. This method can effectively avoid pollution, accurately match the flow requirements, regularly clean the conveyor line, comprehensively guarantee the operation quality of the clean laboratory, and ensure that the high cleanliness requirements of the experimental space are met.

Description

Method, system and storage medium for controlling circulation of pressure difference channel in clean laboratory

Technical Field

The application relates to the technical field of air purification and ventilation, in particular to a circulation control method, a circulation control system and a storage medium for a pressure difference channel of a clean laboratory.

Background

The clean laboratory is a special experiment place with extremely high requirements on environmental cleanliness and contains a plurality of experiment spaces. For example, a laboratory for raising a laboratory animal includes a clean room, a normal raising room, and an ultrahigh raising room, and the number of each space may be plural depending on the size of the scale. And the space is isolated by a door and a wall, and then communicated by various conveying channels, and a circulation device circulates in the conveying channels, so that circulation work in different spaces is realized.

The conveying channel is internally provided with a conveying device, the transfer device is combined with the manipulator to be placed on the conveying device, and then the transfer device is conveyed into a corresponding experiment space through the conveying device according to a set planning path.

Because through the transfer passage UNICOM between the experimental space, although be provided with sealing door in the transfer passage, when the circulation ware was circulated through sealing door, can carry out the intercommunication of a period of time between the experimental space, the experimental space that has the pollution exists the possibility that influences the experimental space that does not have the pollution to can't guarantee the clean requirement in experimental space.

Disclosure of Invention

In order to reduce pollution influence generated when a flow converter flows between different experimental spaces, the application provides a flow control method, a flow control system and a storage medium for a clean laboratory pressure difference channel.

In a first aspect, the present application provides a method for controlling circulation of a clean laboratory pressure difference channel, which adopts the following technical scheme:

The circulation control method of the pressure difference channel of the clean laboratory is based on a clean conveying line and a dirty conveying line, wherein the clean conveying line comprises a clean conveying channel, a clean buffer cabin communicated with the clean conveying channel and a clean sealing door positioned in front of and behind the clean buffer cabin, the dirty conveying line comprises a dirty conveying channel, a dirty buffer cabin communicated with the dirty conveying channel and a dirty sealing door positioned in front of and behind the dirty buffer cabin, and a blower is arranged in the clean conveying channel;

The method comprises the following steps:

Acquiring 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 work at a first rotation speed for a first set time;

The size of the first rotating speed is regulated according to the inverse relation of the size of the flow converter, the larger the size of the flow converter is, the smaller the first rotating speed is, the smaller the size of the flow converter is, and the larger the first rotating speed is;

The first setting time is adjusted according to positive correlation of the number of the flow converters, the larger the number of the flow converters is, the longer the first setting time is, the smaller the number of the flow converters is, and the shorter the first setting time is;

acquiring a second circulation instruction, closing the clean sealing door and opening the dirty sealing door according to the second circulation instruction, and setting the exhaust fan to continuously work at a second rotating speed for a second set time;

the size of the second rotating speed is regulated according to the inverse relation of the size of the flow converter, the larger the size of the flow converter is, the smaller the second rotating speed is, the smaller the size of the flow converter is, and the larger the second rotating speed is;

the second set time is adjusted according to positive correlation of the number of the flow converters, the larger the number of the flow converters is, the longer the second set time is, the smaller the number of the flow converters is, and the shorter the second set time is;

and acquiring a cleaning instruction, and starting a disinfection operation on the clean conveying line and the dirty conveying line according to the cleaning instruction.

Through adopting above-mentioned technical scheme, through setting up clean transfer chain and dirty transfer chain, be equipped with facilities such as corresponding sealing door, fan respectively, in the circulation ware circulation in-process, according to the switch of different circulation orders, rational control clean sealing door and dirty sealing door to and the operating condition of forced draught blower and exhaust fan can effectively avoid the influence of contaminated experimental space to pollution-free experimental space, guarantees the clean requirement in experimental space better, greatly reduced the pollution risk that produces because of the circulation ware circulation between the different experimental spaces. According to the volume and the size of the flow converter, the rotating speed of the fan is regulated in an opposite relation mode, and the working time of the fan is regulated in a positive relation mode according to the number of the flow converters, so that the flexible regulation mode can be more accurately matched with the flow requirements of the flow converters under different conditions. The method has the advantages that the rotating speed of the fan is reduced for the large-size flow converter, unnecessary disturbance and potential pollution caused by overlarge wind speed are avoided, and the working time of the fan is prolonged for the large-number flow converters so as to ensure enough air replacement and purification effects, thereby further improving the cleanliness control level in the flow process. After the cleaning instruction is acquired, the cleaning operation is started on the clean conveying line and the dirty conveying line, the conveying line can be cleaned and disinfected comprehensively by the aid of the method, pollutants possibly remained in the circulation process are effectively removed, the clean state of the conveying line is maintained, a relatively clean and safe environment is provided for subsequent circulation work, and the running quality of a clean laboratory and the accuracy of experimental results are integrally guaranteed.

Optionally, based on the first differential pressure sensor being disposed in the clean conveying channel, the second differential pressure sensor being disposed in the dirty conveying channel, the method further comprises the following steps:

Acquiring a first pressure difference based on the first pressure difference sensor when the blower is set to continuously work at a first rotational speed for a first set time;

Calculating a difference value between the first differential pressure and a preset first threshold value to be a first difference value, sending out a first early warning prompt if the first differential value is larger than a set value, otherwise, adjusting the first rotating speed according to the inverse relation of the first differential value, wherein the larger the first differential value is, the smaller the first rotating speed is, and the larger the first rotating speed is;

When the exhaust fan is set to continuously work at a second rotating speed for a second set time, acquiring a second pressure difference based on the second pressure difference sensor;

Calculating a difference value between the second differential pressure and a preset second threshold value to be a second difference value, sending a second early warning prompt if the second differential pressure is larger than a set value, otherwise, adjusting the second rotating speed according to the inverse relation of the second differential pressure, wherein the larger the second differential pressure is, the smaller the second rotating speed is, and the larger the second rotating speed is.

By adopting the technical scheme, the first differential pressure sensor and the second differential pressure sensor are respectively arranged on the clean conveying channel and the dirty conveying channel, so that differential pressure data in the channels can be acquired in real time. The system can dynamically adjust the rotating speed of the fan based on the actual pressure difference condition, and does not depend on a preset adjusting mode based on the volume and the number of the flow changers. And the rotating speed of the fan is inversely related to the acquired difference value between the pressure difference and the preset threshold value, so that the adjustment is more accurate. When the difference value is relatively large, the pressure condition in the current channel is relatively good, the energy can be saved and the noise and equipment loss generated by the operation of the fan can be reduced when the requirement of cleanliness can be met by properly reducing the rotating speed of the fan, and when the difference value is relatively small, the rotating speed of the fan is increased so as to better maintain the air flow and the pressure balance in the channel and ensure that the cleanliness of an experimental space is not influenced. And when the calculated first difference value or second difference value is larger than a set value, sending out an early warning prompt. The operator can know the possible abnormal conditions in the running process of the system in time. For example, an excessive differential pressure differential may mean that the sealing door is not properly sealed, that the fan is malfunctioning, or that other problems affect the pressure balance within the channel. Through early warning prompt, operators can rapidly take corresponding measures to conduct investigation and repair, and the pollution risk increase of the experimental space caused by potential problems is avoided, so that the reliability and safety of the whole clean laboratory pressure difference channel circulation control system are enhanced. During actual operation, the clean laboratory conditions may be affected by a number of factors, such as the operation of the laboratory equipment, the ingress and egress of personnel, etc., which may cause the pressure differential within the channel to change. Through real-time monitoring pressure difference and according to difference adjustment fan rotational speed, the system can adapt to these complicated changeable operating modes better, keeps stable running state, ensures that the pollution risk in the circulation ware circulation process can be reduced effectively under different circumstances, provides powerful guarantee for clean laboratory's normal operating.

Optionally, the clean conveying channel includes a first clean branch and a second clean branch, and the clean sealing doors are disposed on the first clean branch and the second clean branch, and the method further includes the following steps:

Acquiring a third flow instruction, closing the dirty sealing door according to the third flow instruction, opening the clean sealing door corresponding to the first clean branch, and closing the clean sealing door and the dirty sealing door on the second clean branch;

setting the blower to continuously work at a third rotating speed for a third set time;

in the third set time, according to the running speed and the position information of the flow converter, the opening and closing degree and the opening and closing time of the clean sealing door are adjusted;

When the distance between the flow converter and the clean sealing door corresponding to the first clean branch is smaller than a set value, gradually opening the clean sealing door at a first set speed;

And closing the clean sealing door at a second set speed after the flow converter passes through the clean sealing door, wherein the first set speed is smaller than the second set speed.

By adopting the technical scheme, different branches of the clean conveying channel are respectively controlled, and the clean sealing door of the specific branch can be accurately opened and closed according to actual circulation requirements, so that unnecessary air circulation and potential pollution are avoided. For example, when the flow converter is only required to be conveyed to the experimental space corresponding to the first clean branch, the sealing door of the second clean branch is closed, so that the contact area between the clean space and the outside is effectively reduced, and the pollution risk is reduced. The opening and closing degree and time of the clean sealing door are dynamically adjusted according to the running speed and position information of the transfer device, and efficient connection of the transfer process is achieved. And a sufficient passing space is prepared in advance, so that the smooth passing of the transfer device is ensured, and transfer jam caused by untimely opening of the sealing door or insufficient opening is avoided. Meanwhile, after the flow converter passes through, the sealing door is quickly closed, so that the time window of polluted clean space is reduced, and the safety of the whole system is improved. When the transfer device is abnormally stopped, the opening and closing degree of the sealing door is timely adjusted, so that the pressure stability in the clean conveying channel can be maintained. The stable pressure environment is crucial for keeping the cleanliness of the clean space, can prevent the diffusion of pollutants caused by pressure fluctuation, ensures the normal operation of a clean laboratory, and provides a reliable environment foundation for the smooth development of experiments.

Optionally, the step of acquiring the first forwarding instruction includes:

Based on a plurality of infrared sensors arranged in sequence at the inlet of the clean conveying channel, when the flow converter passes through the plurality of infrared sensors arranged in sequence, a first response sequence of the infrared sensors is obtained;

the step of obtaining the second forwarding instruction includes:

Based on a plurality of pressure sensors arranged in sequence at the inlet of the dirt conveying channel, when the flow converter passes through the plurality of pressure sensors arranged in sequence, a second response sequence of the pressure sensors is obtained, and a corresponding second flow instruction is matched according to the second response sequence.

Through adopting above-mentioned technical scheme, set up a plurality of infrared sensors according to the sequence arrangement at clean conveying channel entry, utilize the object to shelter from the signal variation that produces to infrared light, information such as position, speed and direction when can accurate capture the flow converter and get into, form unique first response sequence. Also, a pressure sensor is provided at the inlet of the dirty conveying channel to obtain a second response sequence by detecting pressure changes generated as the flow diverter passes. Based on the accurate response sequences, corresponding circulation instructions are matched, the accuracy of instruction acquisition is greatly improved, misoperation or transport confusion of equipment caused by instruction errors is avoided, and the circulation device is ensured to accurately operate in different conveying channels according to preset flows and paths.

Optionally, the particle detector is configured in the experimental space, and the method further comprises:

Acquiring cleanliness data of a particle detector in real time;

Monitoring the change trend of the cleanliness in the experimental space, and adjusting the rotating speeds of the blower and the exhaust fan according to the cleanliness when the cleanliness is monitored to be in a descending state and the descending speed exceeds a set descending threshold value;

When the cleanliness is lower, the rotating speeds of the air blower and the exhaust fan are higher;

and when the cleanliness is higher, the rotating speeds of the air blower and the exhaust fan are smaller.

By adopting the technical scheme, the cleanliness data of the particle detector is obtained in real time, the change trend of the cleanliness data is monitored, and abnormal changes of the cleanliness in the experimental space can be found in time. When the cleanliness decline speed exceeds a set threshold, the rotating speeds of the blower and the exhaust fan are regulated according to the cleanliness, and the accurate dynamic regulation mechanism can rapidly and effectively cope with the fluctuation of the cleanliness. When the cleanliness is higher, the rotating speed of the blower is reduced, the energy waste and unnecessary equipment loss caused by excessive ventilation are avoided, and meanwhile, relatively stable microenvironment in the experimental space is maintained, so that reliable clean environment guarantee is provided for smooth experiment.

Optionally, a high-speed camera is arranged in the experiment space, and is used for acquiring transparent image information of the clean conveying channel and the dirty conveying channel, and two side walls in the channel are provided with blowing devices with adjustable rotating speeds and angles, and the method further comprises:

When the cleaning conveying channel or the dirty conveying channel is internally provided with the flow converter to pass, acquiring image information in an experimental space as a channel picture;

Identifying the flow converter and the conveying channel from the channel picture, and calculating the position offset and the offset angle of the flow converter according to the position information of the flow converter and the conveying channel and combining with a preset standard position;

If the position offset exceeds a preset error range, an alarm signal is sent out;

The rotating speed of the blowing device is regulated according to the position offset, wherein the larger the position offset is, the larger the rotating speed of the blowing device is;

And calculating the blowing direction of the blowing device according to the offset angle, the position information of the blowing device in the channel picture and the conveying direction of the flow converter.

By adopting the technical scheme, the positions of the flow converter and the conveying channel can be accurately identified by acquiring the channel image information through the high-speed camera in the experimental space. The rotational speed and the blowing direction of the blowing device are adjusted in a targeted manner by calculating the position offset, the offset angle and the conveying direction of the flow converter. The accurate calculation and regulation mechanism ensures that the blowing device can act on the flow converter by proper wind power and angle, correct the position deviation in time, ensure that the flow converter always keeps the correct running track in the conveying channel, greatly improve the accuracy and stability of the flow process, reduce the problems of collision, damage and the like possibly caused by the deviation of the flow converter, and ensure the safe transportation of experimental articles. When the position offset of the flow converter is detected to exceed the preset error range, the system immediately sends out an alarm signal. The early warning mechanism can enable staff to quickly know abnormal conditions in the transportation process, and corresponding measures can be taken in time for processing. For example, a worker can check whether the conveying equipment has a fault or not in time, or adjust the loading mode of the flow converter, so that the problem that the flow converter is continuously deviated to cause more serious is avoided, the normal operation of a clean laboratory conveying system is ensured, and the risk of experimental interruption is reduced. The whole technical scheme realizes the full-automatic process from image acquisition, information identification, data analysis to equipment regulation and control. The high-speed camera automatically acquires images, automatically identifies and calculates related parameters through an algorithm, and then automatically controls the blowing device to adjust without excessive manual intervention.

Optionally, a camera is installed at a set position in the conveying space, and is used for acquiring transparent image information of the set object positions of the clean conveying channel and the dirty conveying channel, and the method comprises the following steps:

acquiring continuous frame images at specific positions based on the camera as monitoring images;

identifying the flow converter from the monitoring image;

calculating the distance between adjacent flow converters as an adjacent distance, and calculating the variation of the adjacent distance;

If the adjacent distance is smaller than the set distance value, sending out an early warning prompt;

and if the variation of the adjacent distance is greater than or equal to the set variation, sending out an early warning prompt.

Through adopting above-mentioned technical scheme, utilize the camera to acquire the image of monitoring the wide-angle point position such as turn or climbing and discern the circulation ware, calculate the distance of adjacent circulation ware and the variation thereof, can real-time supervision circulation ware running state in conveying passageway. When the adjacent distance is smaller than the set distance value, an early warning prompt is sent out, so that blocking collision accidents between the flow changers can be avoided. In clean laboratory, the circulation ware carries important experiment sample or equipment, in case the collision, can damage circulation ware itself, can also lead to experiment sample to pollute or equipment trouble, influences the normal clear of experiment. The early warning can enable staff to take measures in time, such as adjusting conveying speed or checking running conditions of equipment, so that safety of the conveying process is ensured.

Optionally, photoelectric sensors are disposed at the inlet of the clean conveying channel and the outlet of the dirty conveying channel, and the method further comprises the following steps:

Counting the number of times of the change of the photoelectric sensor signal at the inlet of the clean conveying channel to be a first number in a set time period, wherein the number of times of the change of the photoelectric sensor signal at the outlet of the dirty conveying channel to be a second number;

And if the period difference value is larger than the set difference value, sending out an early warning prompt.

By adopting the technical scheme, the photoelectric sensors are arranged at the inlet of the clean conveying channel and the outlet of the dirty conveying channel, and the number of signal changes in a set time period is counted, so that the passing quantity of the flow converter at the two key positions can be accurately mastered. By calculating the difference value of the first quantity and the second quantity, an early warning prompt is sent out once the period difference value is larger than the set difference value, so that the system can timely detect abnormal conditions such as article loss, blockage or equipment failure possibly occurring in the transportation process.

In a second aspect, the present application provides a circulation control system for a clean laboratory differential pressure channel, which adopts the following technical scheme:

a flow control system for a clean laboratory differential pressure channel comprising a processor in which the steps of the flow control method for a clean laboratory differential pressure channel as described in any one of the preceding claims are performed.

In a third aspect, the present application provides a storage medium, which adopts the following technical scheme:

A storage medium having a program stored therein, which when executed by a processor, implements the steps of the flow control method of the clean laboratory differential pressure channel of any one of the above.

In summary, the present application includes at least one of the following beneficial technical effects:

By constructing an independent clean conveying line and a dirty conveying line and matching with an intelligent control sealing door and a fan, the influence of a polluted experiment space on the clean experiment space is greatly reduced, the high cleanliness requirement of the experiment space is strictly ensured, and reliable basic conditions are provided for various experiments with harsh environmental requirements.

Parameters such as fan rotating speed, sealing door opening and closing, blowing device operation and the like are adjusted in real time and accurately according to the volume, the number and the pressure difference in channels of the flow converter, complex working condition changes can be flexibly coped with, the system is ensured to be always in a high-efficiency stable operation state, and the safety and the reliability of the flow process are effectively improved.

Comprehensive application of various sensors and cameras realizes comprehensive monitoring on multiple aspects of the position, the number, the adjacent spacing, the channel blockage and the like of the flow converter. Once abnormal conditions occur, early warning prompt can be sent out rapidly, so that workers can find out and process problems in time, the expansion of faults is avoided, smooth operation of a clean laboratory transport system is guaranteed, and the risk of experiment interruption is reduced.

From instruction acquisition, data acquisition analysis to equipment control adjustment, the whole process realizes high automation, reduces manual intervention, reduces errors and risks caused by human factors, improves working efficiency, improves intelligent management level of a system, and provides powerful support for efficient operation of a laboratory.

According to the actual operation condition, the operation parameters of the equipment are dynamically adjusted, such as the rotation speed of the fan is reduced when the cleanliness requirement is met, so that the energy consumption is saved, the abrasion and noise of the equipment are reduced, the service life of the equipment is prolonged, the maintenance cost of the equipment is reduced, and the balance optimization of the economic benefit and the system performance is realized.

Drawings

FIG. 1 is a step diagram of a flow control method for a clean laboratory differential pressure channel of the present application.

FIG. 2 is a schematic diagram of the spatial structure of a clean laboratory of the present application.

FIG. 3 is a step chart of adjusting a first rotational speed and a second rotational speed based on a monitored differential pressure within a delivery passage.

The device comprises a reference numeral 1, a clean conveying channel, a clean buffer cabin, a clean sealing door, a dirty conveying channel, a dirty buffer cabin and a dirty sealing door.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings.

In the description of the present specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 and 2, the clean laboratory includes a conveyor system, an air supply and exhaust and pressure differential control system, a monitoring and alarm system:

The conveying system comprises a clean conveying line and a dirty conveying line, wherein the clean conveying line comprises a clean conveying channel 1, a clean buffer cabin 2 communicated with the clean conveying channel 1 and clean sealing doors 3 positioned in front of and behind the clean buffer cabin 2. The dirty conveying line comprises a dirty conveying channel 4, a dirty buffer cabin 5 communicated with the dirty conveying channel 4 and dirty sealing doors 6 positioned in front of and behind the dirty buffer cabin 5. An air blower is arranged in the clean conveying channel 1, and an exhaust fan is arranged in the dirty conveying channel 4. In addition, still include multiple equipment such as vertical lift, horizontal transfer chain, turn transfer chain, climbing transfer chain, these equipment interconnect forms a complete transport network, can realize the automatic circulation of the universe of circulation ware in experimental facilities. The cleaning device can be transported smoothly in both clean areas and dirty areas without manual intervention, so that the working efficiency is greatly improved and the labor cost is reduced. And inputting transportation demands in a terminal room, and selecting an optimal path for the flow converter and intelligently distributing transportation tasks by the system after calculation.

The buffer cabin is positioned at a position where a clean barrier needs to be crossed, sealing doors are arranged on the front and rear sides of the buffer cabin, and temporary relative isolation between the buffer cabin and the front and rear environment is realized through switch control and monitoring of the differential pressure sensor. When the flow converter flows among areas with different clean grades, the buffer cabin can effectively reduce air mixing, reduce cross infection risk, ensure the stability and independence of the environments of all areas and maintain the high clean standard of the clean areas.

And the air supply and exhaust and pressure difference control structure is characterized in that each circulation channel is designed into a relatively independent space, and the air supply opening and the air outlet are provided with electric control valves. The pressure data is monitored in real time through a pressure difference sensor in the channel, and the opening of the electric valve is accurately regulated by a system through a PID control technology. The clean conveying channel 1 keeps positive pressure difference of +15 to +25Pa relative to the outside to prevent the invasion of outside polluted air, and the dirty conveying channel 4 keeps negative pressure difference of-5 to-15 Pa to prevent the leakage of inside polluted air to the clean area. Once the pressure leakage and the pressure stabilization failure occur in the channel, the system immediately triggers an alarm and starts the self-contained blower or exhaust fan to carry out emergency treatment, so that the pressure stability of the channel is ensured.

And the monitoring and alarming system is characterized in that a particle detector is arranged in an independent area, the air cleanliness is continuously monitored for 24 hours, and an alarm is timely sent out once the cleanliness exceeds a set standard, so that the experimental environment is ensured to always meet the requirements. The high-speed cameras are arranged on each transportation section, so that images can be captured when objects pass through, and when abnormal deviation of the positions of the objects is detected, the alarm is immediately given, and accidents are prevented from happening in the transportation process. The cameras are arranged at special points such as turning, climbing and the like, so that whether blockage occurs or not can be observed in real time, and the smoothness of a transportation line is ensured. Photoelectric sensors at the inlet and the outlet of the equipment can rapidly find the omission problem in the transportation process by comparing the quantity of the in-out convertors, and the accuracy and the integrity of the circulation of experimental appliances are ensured.

This laboratory adopts people stream commodity circulation to cut apart the design, and commodity circulation conveying channel sets up in the top of experimental space, has utilized the space ingeniously, has reduced the occupation to laboratory ground space, makes laboratory interior space obtain more abundant utilization.

The embodiment of the application discloses a circulation control method of a clean laboratory pressure difference channel, referring to fig. 1 and 2, based on the laboratory structural design, the method comprises the following steps:

The method comprises the steps of obtaining a first circulation instruction, closing a dirty sealing door 6 according to the first circulation instruction to prevent air in a dirty area from flowing into a clean area, opening the clean sealing door 3, setting a blower to continuously work for a first set time at a first rotation speed, continuously feeding clean air, keeping a positive pressure difference of +15 to +25Pa in a clean conveying channel 1, and effectively preventing external polluted air from invading the clean area. For example, when a high-precision biological experiment is performed, once the pollutants such as bacteria and viruses possibly carried in the outside air enter a clean area, serious interference can be generated on an experiment result, and the positive pressure difference design provides reliable guarantee for the experiment.

The larger the volume of the flow converter, the smaller the displacement effect on air when the flow converter moves in the channel, and therefore, the smaller the required rotating speed of the blower. Conversely, the smaller the volume of the flow diverter, the less it impedes the flow of air, and the greater the first rotational speed to maintain a positive pressure differential. Assuming a volume of 0.5 cubic meters for flow diverter a, a volume of 1 cubic meter for flow diverter B. When the flow converter A moves in the channel, the obstruction to the air flow is relatively small due to the small volume, the first rotating speed of the air blower needs to be set to 2000 revolutions per minute in order to maintain the positive pressure difference of +15 to +25Pa, and when the flow converter B moves, the displacement effect to the air is relatively small due to the large volume, and the first rotating speed of the air blower can be reduced to 1500 revolutions per minute. The same batch is a converter with the same size, so that the system can perform uniform parameter setting and control.

The first setting time is adjusted according to the positive correlation of the number of the conveyers, and the longer the number of the conveyers is, the longer the time required for the whole conveying channel 1 to pass smoothly is, so the first setting time is correspondingly prolonged, otherwise, the smaller the number of the conveyers is, the shorter the first setting time is. For example, when there are 5 conveyers to pass through the clean conveying channel 1, the time required for the complete smooth passing is longer due to the large number, the first setting time is set to 10 minutes to ensure that each of the conveyers can pass through safely and stably in the positive pressure difference environment, and when there are only 1 conveyers, the first setting time can be shortened to 2 minutes.

And acquiring a second circulation instruction, and closing the clean sealing door 3 according to the second circulation instruction to prevent the air in the clean area from being polluted by the dirty area. Simultaneously, the dirty sealing door 6 is opened, the exhaust fan is set to continuously work for a second set time at a second rotating speed, so that the negative pressure difference of minus 5Pa to minus 15Pa is maintained in the dirty conveying channel 4, and the internal dirty air is prevented from leaking to a clean area. For example, in the experimental process, when the experimental result needs to be transferred out through the flow converter, for example, when the experimental result is transferred out of experimental animals raised for a period of time, pollutants can exist in the flow converter, and negative pressure difference can effectively prevent the pollutants from diffusing to other areas along with air, so that the overall safety of a laboratory is ensured.

The second rotating speed is regulated according to the inverse relation of the volume of the flow converter, the larger the volume of the flow converter is, the smaller the second rotating speed is, and the smaller the volume of the flow converter is, the larger the second rotating speed is. If the volume of the flow converter is smaller, such as a 0.3 cubic meter flow converter, the second rotating speed of the exhaust fan is increased to 2200 rpm.

The second setting time is adjusted according to positive correlation of the number of the convectors, the larger the number of the convectors is, the longer the second setting time is, and the smaller the number of the convectors is, the shorter the second setting time is. When there are 8 diverters to pass through the dirty conveying channel 4, the second set time is set to 12 minutes, and when there are only 2 diverters, the second set time can be shortened to 4 minutes.

And acquiring a cleaning instruction, and starting a disinfection operation on the clean conveying line and the dirty conveying line according to the cleaning instruction. Because clean transfer chain and dirty transfer chain bear clean article and the transportation of dirty article respectively in the experimentation, in order to prevent cross contamination, ensure the accuracy and the security of follow-up experiment. The disinfection operation covers all conveying line related components such as a clean conveying channel 1, a clean buffer cabin 2, a clean sealing door 3, a dirty conveying channel 4, a dirty buffer cabin 5, a dirty sealing door 6 and the like, adopts professional disinfection equipment and disinfection reagents conforming to laboratory standards, and operates according to a specified disinfection flow and time so as to ensure the cleanness and sanitation of the whole conveying system. For example, in a biological laboratory, a high-efficiency disinfectant such as hydrogen peroxide is used for disinfection, and the disinfection time is strictly executed according to a specified process, and generally lasts for more than 30 minutes, so that the cleanness and sanitation of the whole conveying system are ensured, and the whole conveying system is fully prepared for the next experimental circulation.

Through setting up clean transfer chain and dirty transfer chain, be equipped with corresponding sealing door, fan etc. facilities respectively, in the circulation ware circulation in-process, according to the switch of different circulation instructions, rational control clean sealing door 3 and dirty sealing door 6 to and the operating condition of forced draught blower and exhaust fan can effectively avoid having the influence of polluted experimental space to pollution-free experimental space, guarantees the clean requirement in experimental space better, greatly reduced the pollution risk that produces because of the circulation ware circulation between the different experimental spaces. According to the volume and the size of the flow converter, the rotating speed of the fan is regulated in an opposite relation mode, and the working time of the fan is regulated in a positive relation mode according to the number of the flow converters, so that the flexible regulation mode can be more accurately matched with the flow requirements of the flow converters under different conditions. The method has the advantages that the rotating speed of the fan is reduced for the large-size flow converter, unnecessary disturbance and potential pollution caused by overlarge wind speed are avoided, and the working time of the fan is prolonged for the large-number flow converters so as to ensure enough air replacement and purification effects, thereby further improving the cleanliness control level in the flow process. After the cleaning instruction is acquired, the cleaning operation is started on the clean conveying line and the dirty conveying line, the conveying line can be cleaned and disinfected comprehensively by the aid of the method, pollutants possibly remained in the circulation process are effectively removed, the clean state of the conveying line is maintained, a relatively clean and safe environment is provided for subsequent circulation work, and the running quality of a clean laboratory and the accuracy of experimental results are integrally guaranteed.

Referring to fig. 3, based on the first differential pressure sensor being disposed in the clean transportation path 1 and the second differential pressure sensor being disposed in the dirty transportation path 4, the method further comprises the steps of:

when the blower is set to continuously operate at the first rotational speed for a first set time, a first differential pressure is acquired based on the first differential pressure sensor. For example, during one test material conveyance, the blower is operated at a first rotational speed of 1800 rpm, and the first differential pressure sensor detects a first differential pressure of 20Pa at this time.

The method comprises the steps of calculating a difference value between a first differential pressure and a preset first threshold value to be a first difference value, sending out a first early warning prompt if the first differential value is larger than a set value, otherwise, adjusting the first rotating speed according to the inverse correlation of the first differential value, wherein the larger the first differential value is, the smaller the first rotating speed is, and the larger the first rotating speed is.

Assuming that the preset first threshold is 20Pa, in the above example, the first difference is 20Pa to 20 pa=0. Assuming that the set value is 3, comparing the first difference value with a preset first threshold value. If the first difference is greater than the set value, for example, when the first pressure difference is 24Pa, the first difference is 24Pa-20 pa=4, and at this time, a first early warning prompt is sent. The early warning prompt is displayed on a monitoring system of a laboratory in the form of audible and visual alarm, and reminds workers that the pressure difference of the clean conveying channel 1 has large fluctuation and needs to be focused. If the first difference is not greater than the set value, the system adjusts the first rotation speed according to the inverse relation of the first difference. Specifically, the larger the first difference, the smaller the first rotation speed, and the smaller the first difference, the larger the first rotation speed. For example, when the first differential pressure is 18Pa, the first differential value is 20Pa-18 pa=2, and in order to make the differential pressure closer to the preset threshold, the system will properly increase the first rotation speed, and when the first differential pressure is 22Pa, the first differential value is 22Pa-20 pa=2, the system will properly decrease the first rotation speed to maintain the stability of the differential pressure.

And when the exhaust fan is set to continuously work at the second rotating speed for a second set time, acquiring a second pressure difference based on a second pressure difference sensor. For example, in the process of recycling the dirt experiment appliance, the exhaust fan operates at a second rotating speed of 2000 revolutions per minute, and the second differential pressure sensor measures the second differential pressure to be-10 Pa.

Calculating a difference value between the second differential pressure and a preset second threshold value to be a second difference value, sending a second early warning prompt if the second differential value is larger than a set value, otherwise, inversely related adjusting the second rotating speed according to the second differential value, wherein the larger the second differential value is, the smaller the second rotating speed is, and the smaller the second differential value is, the larger the second rotating speed is.

Assuming that the preset second threshold is-10 Pa, in this example, the second difference is-10 Pa- (-10 Pa) =0.

Let the set value be 2, and compare. If the second difference is greater than the set value, for example, when the second pressure difference is-7 Pa, the second difference is-7 Pa- (-10 Pa) =3, and at this time, a second early warning prompt is sent to remind the staff that the negative pressure difference of the dirty conveying channel 4 is abnormal, and the risk of dirty air leakage may exist.

If the second difference is not greater than the set value, the system inversely adjusts the second rotation speed according to the second difference. For example, when the second differential pressure is-12 Pa, the second differential value is-10 Pa- (-12 Pa) =2, the system can properly reduce the second rotation speed, and when the second differential pressure is-8 Pa, the second differential value is-8 Pa- (-10 Pa) =2, the system can properly increase the second rotation speed, thereby ensuring that the negative differential pressure of the dirty conveying channel 4 is stabilized within a reasonable range, and preventing the dirty air from leaking to the clean area.

The first differential pressure sensor and the second differential pressure sensor are respectively arranged on the clean conveying channel 1 and the dirty conveying channel 4, so that differential pressure data in the channels can be acquired in real time. The system can dynamically adjust the rotating speed of the fan based on the actual pressure difference condition, and does not depend on a preset adjusting mode based on the volume and the number of the flow changers. And the rotating speed of the fan is inversely related to the acquired difference value between the pressure difference and the preset threshold value, so that the adjustment is more accurate. When the difference value is relatively large, the pressure condition in the current channel is relatively good, the energy can be saved and the noise and equipment loss generated by the operation of the fan can be reduced when the requirement of cleanliness can be met by properly reducing the rotating speed of the fan, and when the difference value is relatively small, the rotating speed of the fan is increased so as to better maintain the air flow and the pressure balance in the channel and ensure that the cleanliness of an experimental space is not influenced. And when the calculated first difference value or second difference value is larger than a set value, sending out an early warning prompt. The operator can know the possible abnormal conditions in the running process of the system in time. For example, an excessive differential pressure differential may mean that the sealing door is not properly sealed, that the fan is malfunctioning, or that other problems affect the pressure balance within the channel. Through early warning prompt, operators can rapidly take corresponding measures to conduct investigation and repair, and the pollution risk increase of the experimental space caused by potential problems is avoided, so that the reliability and safety of the whole clean laboratory pressure difference channel circulation control system are enhanced. During actual operation, the clean laboratory conditions may be affected by a number of factors, such as the operation of the laboratory equipment, the ingress and egress of personnel, etc., which may cause the pressure differential within the channel to change. Through real-time monitoring pressure difference and according to difference adjustment fan rotational speed, the system can adapt to these complicated changeable operating modes better, keeps stable running state, ensures that the pollution risk in the circulation ware circulation process can be reduced effectively under different circumstances, provides powerful guarantee for clean laboratory's normal operating.

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 respectively provided with a clean sealing door 3, and the method further comprises the following steps:

and acquiring a third flow instruction, closing the dirty sealing door 6 according to the third flow instruction, opening the clean sealing door 3 corresponding to the first clean branch, closing the clean sealing door 3 on the second clean branch, and closing the dirty sealing door 6.

The blower is set to continuously operate at the third rotation speed for a third set time. For example, for some experiments requiring high air flow stability, the blower may be operated at a third relatively low rotational speed, such as 1500 rpm, for a duration of 5 minutes to create a stable clean air flow environment that prevents interference with the test items due to excessive air flow.

And in the third set time, according to the running speed and the position information of the flow converter, adjusting the opening and closing degree and the opening and closing time of the clean sealing door 3.

When the distance between the flow converter and the clean sealing door 3 corresponding to the first clean branch is smaller than a set value, the clean sealing door 3 is gradually opened at a first set speed. When the distance between the circulator and the clean sealing door 3 corresponding to the first clean branch is smaller than the set value, the system gradually opens the clean sealing door 3 at the first set speed in order to ensure that the circulator can smoothly enter the clean sealing door assuming that the set value is 0.5 m. For example, when the diverter approaches 30.8 meters from the clean seal door, the clean seal door 3 will begin to slowly open at a first set speed, such as 0.1 meters/second. This speed is relatively slow in order to avoid turbulence of the air flow caused by abrupt opening of the door, affecting the environmental stability in the clean area.

After the flow converter passes through the clean sealing door 3, the clean sealing door 3 is closed at a second set speed, wherein the first set speed is smaller than the second set speed. After the flow converter passes through the clean sealing door 3 successfully, the system closes the clean sealing door 3 at a second set speed in order to restore the tightness of the clean area as soon as possible and prevent external contaminants from entering. The second set speed is here greater than the first set speed, for example 0.3 m/s, since the passage of the flow-through device is already completed at this point, which requires a rapid closing of the sealing door. For example, when the flow converter passes through the clean sealing door 3 completely, the clean sealing door 3 is closed at a relatively fast speed of 0.3 m/s, so that the clean area is isolated from the external environment again, and the high cleanliness in the experimental area is not affected.

The different branches of the clean conveying channel 1 are respectively controlled, so that the clean sealing door 3 of the specific branch can be accurately opened and closed according to actual circulation requirements, and unnecessary air circulation and potential pollution are avoided. For example, when the flow converter is only required to be conveyed to the experimental space corresponding to the first clean branch, the sealing door of the second clean branch is closed, so that the contact area between the clean space and the outside is effectively reduced, and the pollution risk is reduced. The opening and closing degree and time of the clean sealing door 3 are dynamically adjusted according to the running speed and the position information of the circulation device, so that efficient connection of the circulation process is realized. And a sufficient passing space is prepared in advance, so that the smooth passing of the transfer device is ensured, and transfer jam caused by untimely opening of the sealing door or insufficient opening is avoided. Meanwhile, after the flow converter passes through, the sealing door is quickly closed, so that the time window of polluted clean space is reduced, and the safety of the whole system is improved. When the circulation device is abnormally stopped, the opening and closing degree of the sealing door is timely adjusted, so that the pressure stability in the clean conveying channel 1 can be maintained. The stable pressure environment is crucial for keeping the cleanliness of the clean space, can prevent the diffusion of pollutants caused by pressure fluctuation, ensures the normal operation of a clean laboratory, and provides a reliable environment foundation for the smooth development of experiments.

The step of obtaining the first streaming instruction comprises:

Based on a plurality of infrared sensors arranged in sequence at the inlet of the clean conveying channel 1, when the flow converter passes through the plurality of infrared sensors arranged in sequence, a first response sequence of the infrared sensors is obtained, and corresponding first flow instructions are matched according to the first response sequence.

For example, it is marked as an infrared sensor a, an infrared sensor b, an infrared sensor c, etc. in this order from the entrance. These infrared sensors will be passed in sequence when the diverter starts to enter the clean conveyor channel 1. Each time the flow converter passes an infrared sensor, the sensor generates a response signal. For example, when a small laboratory sample flow diverter enters the clean conveyor channel 1, the infrared sensor a is triggered first, which immediately sends a signal, and then the diverter continues to advance, triggering the infrared sensor b and the infrared sensor c in sequence. The order in which the sensors emit signals constitutes a first response sequence. It is assumed that in this example, the first response sequence is [ infrared sensor a, infrared sensor b, infrared sensor c ]. The system performs matching in a preset instruction library according to the first response sequence. Different response sequences correspond to different flow requirements and experimental operations, so that the corresponding first flow instructions need to be precisely matched. For example, the response sequence of [ infrared sensor a, infrared sensor b, infrared sensor c ] described above corresponds to the first branch of the flow diverter leading to the clean conveyor channel 1 for entering the corresponding laboratory space for a specific sample analysis operation. Therefore, the system will compare the first response sequence with the stored instruction information, and finally match the corresponding first circulation instruction, where the instruction includes detailed information such as the target position of the circulation device, the required conveying speed, and the like. For example, in an experiment with a biological sample, if the first response sequence is [ infrared sensor a, infrared sensor b, infrared sensor c ], the matched first flow instruction is to direct the biological sample flow diverter to the first leg of the clean conveyor channel 1, and transport at a speed of 1 meter/second.

The step of obtaining the second forwarding instruction includes:

Based on a plurality of pressure sensors arranged in sequence at the inlet of the dirty conveying channel 4, when the flow converter passes through the plurality of pressure sensors arranged in sequence, a second response sequence of the pressure sensors is obtained, and corresponding second flow instructions are matched according to the second response sequence. A plurality of pressure sensors arranged in sequence, the pressure sensors are closely arranged, and are numbered as a pressure sensor A, a pressure sensor B, a pressure sensor C and the like from an inlet according to a certain logic sequence. The main function of the pressure sensor is to provide the position and movement information of the flow converter for the system by sensing the pressure change generated when the flow converter passes. When the diverter enters the dirty conveying channel 4, pressure is applied to the passing pressure sensors, causing them to respond in turn. For example, when a diverter from which a flow is diverted enters the dirty conveying channel 4, the pressure sensor a is triggered first, the pressure sensor B and the pressure sensor C are triggered next, and the pressure change signal is recorded. The order in which the pressure sensors produce responses constitutes a second response sequence. It is assumed that in this case the second response sequence is [ pressure sensor a, pressure sensor B, pressure sensor C ]. The system searches the corresponding instruction library for a matching second streaming instruction according to the second response sequence. The second, different response sequence reflects different flow demands, in particular for operations in the dirty conveying channel 4, involving clean disposal of waste, etc.

The inlet of the clean conveying channel 1 is provided with a plurality of infrared sensors which are arranged in sequence, and the information such as the position, the speed, the direction and the like when the flow converter enters can be accurately captured by utilizing the signal change generated by shielding the infrared light by an object, so that a unique first response sequence is formed. Also, a pressure sensor provided at the inlet of the dirty conveying channel 4 acquires a second response sequence by detecting pressure changes generated as the flow diverter passes. Based on the accurate response sequences, corresponding circulation instructions are matched, the accuracy of instruction acquisition is greatly improved, misoperation or transport confusion of equipment caused by instruction errors is avoided, and the circulation device is ensured to accurately operate in different conveying channels according to preset flows and paths.

The particle detector is configured in the experimental space, and the method further comprises:

The particle detector in the experimental space continuously works and is used for acquiring the cleanliness data in real time. These cleanliness data reflect the number and size distribution of particles in the air in the laboratory space and are an important indicator for measuring laboratory cleanliness. For example, particle detectors sample and analyze air in an experimental space at a frequency of once per second, detect the amount and size of contaminants including, but not limited to, dust particles, microbial particles, etc., and convert this information into quantifiable data. For example, it is detected that the experimental space contains 100 dust particles of 0.5 μm or more and 5 microorganism particles per cubic meter of air, and these data are transmitted to a laboratory control system in real time as a basis for determining the cleanliness of the experimental space.

The change trend of the cleanliness in the experimental space is monitored, and the monitoring process is based on continuous cleanliness data, and whether the cleanliness is in an ascending, descending or relatively stable state is judged through a time sequence analysis and data processing technology. When the cleanliness is monitored to be in a descending state and the descending speed exceeds a set descending threshold value, the rotating speeds of the blower and the exhaust fan are adjusted according to the cleanliness. For example, in the past one minute, by analysis of the particle detector data, it was found that the cleanliness data exhibited a tendency to gradually increase from 100 dust particles of 0.5 μm and above per cubic meter and 5 microorganism particles to 120 dust particles and 8 microorganism particles, which indicates that the cleanliness is in a reduced state. When the cleanliness is monitored to be in a reduced state, the system further calculates the reduction speed of the cleanliness. For example, if the number of dust particles increases from 80 to 150 per cubic meter in the past 5 minutes, the system calculates the rate of decrease in cleanliness from these data. If the drop rate exceeds a set drop threshold, corresponding adjustment measures are required, assuming that the drop threshold is increased by 10 dust particles per cubic meter per minute.

When the cleanliness is lower, the system increases the rotational speed of the blower and the exhaust fan in order to quickly restore the cleanliness of the experimental space. For example, if the cleanliness in the experimental space is reduced to 200 dust particles and 10 microorganism particles of 0.5 μm or more per cubic meter, the rotation speed of the blower is increased from the original 1500 rpm to 2000 rpm, and the rotation speed of the exhaust fan is increased from 1200 rpm to 1600 rpm, so as to enhance the circulation and replacement of air, discharge the polluted air, and introduce more filtered clean air at the same time, thereby improving the cleanliness of the experimental space.

Conversely, when the cleanliness is high, the rotational speeds of the blower and the exhaust fan are correspondingly reduced. For example, when the cleanliness data shows that there are only 50 dust particles of 0.5 μm or more and 2 microorganism particles per cubic meter, the rotational speed of the blower is reduced to 1000 rpm, and the rotational speed of the exhaust fan is reduced to 800 rpm, so as to maintain a relatively stable and energy-saving operation state, and avoid unnecessary interference of excessive ventilation to the experimental environment.

The cleanliness data of the particle detector is obtained in real time, the change trend of the cleanliness data is monitored, and abnormal changes of the cleanliness in the experimental space can be found in time. When the cleanliness decline speed exceeds a set threshold, the rotating speeds of the blower and the exhaust fan are regulated according to the cleanliness, and the accurate dynamic regulation mechanism can rapidly and effectively cope with the fluctuation of the cleanliness. When the cleanliness is higher, the rotating speed of the blower is reduced, the energy waste and unnecessary equipment loss caused by excessive ventilation are avoided, and meanwhile, relatively stable microenvironment in the experimental space is maintained, so that reliable clean environment guarantee is provided for smooth experiment.

The experiment space is internally provided with a high-speed camera for acquiring the image information of the transparent clean conveying channel 1 and the dirty conveying channel 4, and the two side walls in the channel are provided with blowing devices with adjustable rotating speeds and angles, and the method further comprises the following steps:

When the cleaning conveying channel 1 or the dirt conveying channel 4 is provided with a flow converter to pass through, the image information in the experimental space is acquired as a channel picture. For example, in an automated biological specimen transfer process, when a flow converter carrying a biological specimen of interest enters the clean transfer path 1, a high-speed camera takes pictures at 30 frames per second, capturing the real-time dynamics of the flow converter within the path, and thus creating a series of clear path pictures. The channel pictures contain rich details, so that the appearance and the outline of the flow converter can be seen, and the boundary and the internal structure of the conveying channel can be clearly seen.

The flow converter and the conveying channel are identified from the channel picture, for example, by using a deep learning algorithm, the system can extract the shape, color, texture and other characteristics of the flow converter from the channel picture, and can accurately identify the boundary, shape and various marks in the clean conveying channel 1 or the dirty conveying channel 4. The position offset and the offset angle of the transfer device are calculated according to the position information of the transfer device and the conveying channel and by combining the preset standard position, and the transfer device is supposed to be positioned at the right center position of the clean conveying channel 1 in an ideal state, and the long side of the transfer device is supposed to be parallel to the axis of the conveying channel, namely the preset standard position. However, the actual identified position of the stream transformer from the channel picture may deviate. For example, it was found by calculation that the center position of the flow diverter was shifted to the left by 5 cm with respect to the center position of the channel, which 5 cm is the positional shift amount. Meanwhile, if the long side of the flow converter forms an included angle of 10 degrees with the axis of the conveying channel, the offset angle is 10 degrees. The system can also calculate the conveying direction of the converter according to the front-back position change of the converter in the channel picture. For example, by analyzing the channel pictures of consecutive frames, it is found that the position of the turn is shifted from one end of the channel to the other end at consecutive points of time, whereby it can be determined that the turn is in the conveying direction from left to right along the channel.

And if the position offset exceeds the preset error range, sending out an alarm signal. Assuming a preset position offset error range of 3 cm), the system will send an alarm signal. In the above example, the system would trigger an alarm when the error range is exceeded due to the 5 cm offset.

And adjusting the rotating speed of the blowing device according to the position offset to correct the position of the flow converter. The larger the position offset, the larger the rotational speed of the blower, and the smaller the position offset, the smaller the rotational speed of the blower. For example, when the position offset is 5 cm, the system will adjust the rotational speed of the blower to 2000 rpm to generate a large wind force to push the flow converter back to the correct position, whereas when the position offset is 1 cm, the rotational speed of the blower only needs to be adjusted to 500 rpm to gently fine-tune the position of the flow converter.

And calculating the blowing direction of the blowing device according to the offset angle, the position information of the blowing device in the channel picture and the conveying direction of the flow converter. From the channel picture, the system will further recognize the blowing device. Using image recognition techniques, the system can find the blowing device from a complex picture of the channel based on its unique shape, color or logo, thereby determining the position of the blowing device in the channel.

According to the offset angle, the position information of the blowing device in the channel picture and the conveying direction of the flow converter, the system can accurately calculate the blowing direction of the blowing device. For example, when the diverter is offset 5cm to the left and at an angle of 10 degrees, the system calculates that the blower should blow to the right front to provide a thrust to the right front to return the diverter to the correct position. And with the gradual correction of the position of the flow converter, the system can dynamically adjust the blowing direction and the rotating speed of the blowing device according to the real-time offset and the offset angle, so as to ensure that the flow converter can stably advance along a preset conveying path.

The positions of the flow converter and the conveying channel can be accurately identified by acquiring the channel image information through a high-speed camera in the experimental space. The rotational speed and the blowing direction of the blowing device are adjusted in a targeted manner by calculating the position offset, the offset angle and the conveying direction of the flow converter. The accurate calculation and regulation mechanism ensures that the blowing device can act on the flow converter by proper wind power and angle, correct the position deviation in time, ensure that the flow converter always keeps the correct running track in the conveying channel, greatly improve the accuracy and stability of the flow process, reduce the problems of collision, damage and the like possibly caused by the deviation of the flow converter, and ensure the safe transportation of experimental articles. When the position offset of the flow converter is detected to exceed the preset error range, the system immediately sends out an alarm signal. The early warning mechanism can enable staff to quickly know abnormal conditions in the transportation process, and corresponding measures can be taken in time for processing. For example, a worker can check whether the conveying equipment has a fault or not in time, or adjust the loading mode of the flow converter, so that the problem that the flow converter is continuously deviated to cause more serious is avoided, the normal operation of a clean laboratory conveying system is ensured, and the risk of experimental interruption is reduced. The whole technical scheme realizes the full-automatic process from image acquisition, information identification, data analysis to equipment regulation and control. The high-speed camera automatically acquires images, automatically identifies and calculates related parameters through an algorithm, and then automatically controls the blowing device to adjust without excessive manual intervention.

A camera is arranged at a set position in the conveying space and used for acquiring image information of the set object positions of the transparent clean conveying channel 1 and the dirty conveying channel 4, and the set position comprises a corner with a turning, climbing or a large angle; the method comprises the following steps:

For example, in the experimental environment, the camera shoots the clean conveying channel 1 and the dirty conveying channel 4 at a frequency of 25 frames per second.

And the system can accurately identify the flow converter from the monitoring image through an image identification technology. This process involves an image recognition algorithm that separates the flow converter from its image background based on its unique shape, color, texture, or logo features. For example, assuming that the diverters are a container with a particular color marking, the system will accurately locate the outline of each diverter in the monitored image based on its unique blue marking, distinguishing it from other portions within the channel. Even under the condition of light change or partial shielding, the system can find out the accurate position and shape of the flow converter through the optimization of an algorithm and feature matching.

Taking a clean conveying channel 1 as an example, when a plurality of convectors are sequentially arranged in the channel, the system analyzes the monitoring image and calculates the linear distance between the adjacent convectors. Assuming that three diverters A, B and C are arranged in sequence in a frame of the monitored image, the system will measure the distance between diverter A and diverter B, and the distance between diverter B and diverter C. By calculation, the distance between the convectors a and B was found to be 30 cm and the distance between the convectors B and C was found to be 32 cm. By comparing the monitored images of different frames, it was found that the distance between the convectors a and B changed from the initial 30 cm to 25 cm, and then the amount of change in the adjacent distance was 5 cm.

And if the adjacent distance is smaller than the set distance value, sending out an early warning prompt.

If the adjacent distance is smaller than the set distance value, the system sends out an early warning prompt. Assuming a set distance value of 20 cm, when the distance between adjacent diverters drops to 18 cm as in the example above, this indicates that the distance between the diverters is too close, collision or mutual interference may occur, thereby affecting the safety of the test article and the smooth progress of the test. At this time, the system can send out early warning suggestion, can show a red warning information on laboratory's control interface, trigger the audible alarm simultaneously, remind operating personnel to pay attention to avoid the dangerous condition that probably appears.

If the variation of the adjacent distance is larger than or equal to the set variation, the system also sends out an early warning prompt. Continuing with the above example, if the set change is 4 cm and the distance between adjacent diverters a and B changes from 30 cm to 25 cm, the change is 5 cm, exceeding the set 4 cm, this means that the abnormal change in distance between adjacent diverters may be caused by some unstable factor, which also triggers the system warning. This may affect the orderly transportation of the test article and even damage the test article. In this case, the system will give an early warning, reminding the operator to check if the transport system is abnormal, for example if there is a mechanical failure or a problem with the control program.

The camera is used for acquiring images of large-angle point positions of the monitoring set positions such as turning or climbing and identifying the convertors, the distance between adjacent convertors and the variation thereof are calculated, and the running state of the convertors in the conveying channel can be monitored in real time. When the adjacent distance is smaller than the set distance value, an early warning prompt is sent out, so that blocking collision accidents between the flow changers can be avoided. In clean laboratory, the circulation ware carries important experiment sample or equipment, in case the collision, can damage circulation ware itself, can also lead to experiment sample to pollute or equipment trouble, influences the normal clear of experiment. The early warning can enable staff to take measures in time, such as adjusting conveying speed or checking running conditions of equipment, so that safety of the conveying process is ensured.

Photoelectric sensors are arranged at the inlet of the clean conveying channel 1 and the outlet of the dirty conveying channel 4, and the method further comprises the following steps:

the number of changes of the photoelectric sensor signal at the inlet of the clean conveying channel 1 is counted as a first number, and the number of changes of the photoelectric sensor signal at the outlet of the dirty conveying channel 4 is counted as a second number.

And if the period difference is larger than the set difference, sending out an early warning prompt. In a set time period, for example, the set time period is set to 1 week, the system counts the number of changes of the photosensor signal at the entrance of the clean conveying channel 1, and records the number as a first number. The working principle of the photoelectric sensor is that whether an object passes through a light path or not is detected, and when the object passes through, light is blocked, so that signal change is generated. For example, during the transport of a biological sample, the photosensor detects a change in signal every time a flow diverter containing the biological sample passes through the entrance of the clean transport path 1. Assuming that 50 flow diverters with different biological samples pass through the inlet during this 1 week period, the first number is 50.

Also during this set period of 1 week, the system counts the number of changes in the photosensor signal at the outlet of the dirty conveying channel 4, which is noted as the second number. When the flow diverter leaves the outlet of the dirty conveying channel 4, a signal change is generated by the photoelectric sensor at the position. If 40 diverters with test waste leave the outlet within 1 week, then the second number is 40.

If the period difference is greater than the set difference, the system will send out an early warning prompt assuming the set difference is 5. In the above example, since the calculated period difference is 10 and is greater than the set difference 5, the system will send out an early warning. The early warning prompt can be displayed in various forms, for example, a striking red warning frame is popped up on a monitoring system interface of a laboratory, the information that the quantity of conveyed articles is not matched, the conveying system is checked, and meanwhile, an alarm sound is triggered to draw the attention of staff.

This suggests an abnormal situation during the circulation of the test article. For example, it may be that there is a portion of the diverters within the clean conveyor channel 1 that have not been successfully transported to the dirty conveyor channel 4 for some reason, resulting in a greater number of diverters entering at the entrance of the clean conveyor channel 1 than exiting at the exit of the dirty conveyor channel 4. This may be due to a blockage in a certain part of the conveyor system, which may cause the diverter to stagnate in the middle, or due to a malfunction of the control system, which may cause an error in the transport path of a part of the diverter, or due to damage or loss of the test article during the conveyance, which may not normally reach the outlet of the dirty conveyor channel 4.

Photoelectric sensors are arranged at the inlet of the clean conveying channel 1 and the outlet of the dirty conveying channel 4, and the number of signal changes in a set time period is counted, so that the passing number of the flow converter at the two key positions can be accurately mastered. By calculating the difference value of the first quantity and the second quantity, an early warning prompt is sent out once the period difference value is larger than the set difference value, so that the system can timely detect abnormal conditions such as article loss, blockage or equipment failure possibly occurring in the transportation process.

The embodiment of the application also discloses a circulation control system of the clean laboratory differential pressure channel, which comprises a processor, wherein the processor executes the steps of the circulation control method of the clean laboratory differential pressure channel.

The embodiment of the application also discloses a storage medium, wherein a program is stored in the storage medium, and the program realizes the steps of the flow control method of the clean laboratory differential pressure channel when being executed by a processor.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A circulation control method of a clean laboratory pressure difference channel is characterized by comprising a clean conveying line and a dirty conveying line, wherein the clean conveying line comprises a clean conveying channel (1), a clean buffer cabin (2) communicated with the clean conveying channel (1) and clean sealing doors (3) positioned in front of and behind the clean buffer cabin (2), the dirty conveying line comprises a dirty conveying channel (4), a dirty buffer cabin (5) communicated with the dirty conveying channel (4) and dirty sealing doors (6) positioned in front of and behind 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:

acquiring 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 continuously work at a first rotation speed for a first set time;

the size of the first rotating speed is regulated according to the inverse relation of the size of the flow converter, wherein the larger the size of the flow converter is, the smaller the first rotating speed is, and the smaller the size of the flow converter is, the larger the first rotating speed is;

Acquiring 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 continuously work at a second rotating speed for a second set time;

2. The flow control method of a clean laboratory pressure differential channel according to claim 1, characterized in that based on the first pressure differential sensor being provided in the clean transportation channel (1), the second pressure differential sensor being provided in the dirty transportation channel (4), the method further comprises the steps of:

3. The flow control method of a clean laboratory pressure differential channel according to claim 2, characterized in that the clean transportation channel (1) comprises a first clean branch and a second clean branch, both of which are provided with the clean sealing door (3), the method further comprising the steps of:

Acquiring a third flow instruction, closing the dirty sealing door (6) according to the third flow instruction, opening the clean sealing door (3) corresponding to the first clean branch, and closing the clean sealing door (3) and the dirty sealing door (6) on the second clean branch;

In the third set time, according to the running speed and the position information of the flow converter, the opening and closing degree and the opening and closing time of the clean sealing door (3) are adjusted;

When the distance between the flow converter and the clean sealing door (3) corresponding to the first clean branch is smaller than a set value, gradually opening the clean sealing door (3) at a first set speed;

and closing the clean sealing door (3) at a second set speed after the flow converter passes through the clean sealing door (3), wherein the first set speed is smaller than the second set speed.

4. The method of claim 1, wherein the step of obtaining the first flow instruction comprises:

Based on a plurality of infrared sensors arranged in sequence at the inlet of the clean conveying channel (1), when the flow converter passes through the plurality of infrared sensors arranged in sequence, a first response sequence of the infrared sensors is obtained;

the step of obtaining the second forwarding instruction includes:

Based on a plurality of pressure sensors arranged in sequence at the inlet of the dirt conveying channel (4), when the flow converter passes through the plurality of pressure sensors arranged in sequence, a second response sequence of the pressure sensors is obtained, and a corresponding second flow instruction is matched according to the second response sequence.

5. The flow control method of a clean laboratory pressure differential channel of claim 1, wherein the laboratory space is configured with a particle detector, the method further comprising:

Acquiring cleanliness data of a particle detector in real time;

6. The method for controlling the circulation of a clean laboratory differential pressure channel according to claim 1, characterized in that a high-speed camera is arranged in the experimental space for acquiring transparent image information of the clean conveying channel (1) and the dirty conveying channel (4), and two side walls in the channel are provided with blowing devices with adjustable rotating speeds and angles, and the method further comprises:

When the flow converter passes through the clean conveying channel (1) or the dirty conveying channel (4), acquiring image information in an experimental space as a channel picture;

7. The method for controlling the circulation of the pressure difference channel of the clean laboratory according to claim 1, wherein a camera is installed at a set position in the conveying space for acquiring transparent image information of the set positions of the clean conveying channel (1) and the dirty conveying channel (4), the method comprising the steps of:

identifying the flow converter from the monitoring image;

8. The flow control method of a clean laboratory differential pressure channel according to claim 1, characterized in that a photoelectric sensor is provided at both the inlet of the clean transportation channel (1) and the outlet of the dirty transportation channel (4), the method further comprising the steps of:

Counting the number of times of the change of the photoelectric sensor signal at the inlet of the clean conveying channel (1) to be a first number and the number of times of the change of the photoelectric sensor signal at the outlet of the dirty conveying channel (4) to be a second number in a set time period;

9. A flow control system for a clean laboratory differential pressure channel, comprising a processor, wherein the steps of the flow control method for a clean laboratory differential pressure channel as claimed in any one of claims 1 to 8 are performed in the processor.

10. A storage medium having stored therein a program which when executed by a processor performs the steps of the flow control method of a clean laboratory pressure differential channel as claimed in any one of claims 1 to 8.