A system and method for monitoring, tracing and early warning and regulation of virus transmission in a building

Abstract

The present application relates to a kind of monitoring, tracing and early warning control system and method of virus transmission in building, can monitor the environmental parameter in real time in building, real-time acquisition human physiological index judges human health status and obtains each personnel movement trajectory and droplet transmission trajectory, to identify suspected infected person and his close contact in time, accurate, simultaneously, take countermeasures to suspected infected person and close contact person.In addition, it can also assess the current indoor environmental transmission risk, according to the transmission risk assessment results, the indoor environment is ventilated and purified, and the local area of suspected infected person and close contact person is effectively ventilated and purified, to reduce the risk of transmission.Combining building indoor environmental parameters, human health characteristics and virus transmission risk assessment, both can accurately judge the state of indoor environment in building, also can identify suspected infected person and his close contact in real time, realize the overall ventilation and purification of indoor environment and local purification treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of virus transmission monitoring, tracing and early warning control, in particular to a system and method for monitoring, tracing and early warning control of virus transmission in a building. BACKGROUND

[0002] At present, building control mostly takes user-set environmental threshold as control target, and considers the whole room according to the lumped parameter method. With the emergence of the new coronavirus pneumonia, this control method of user setting and ignoring local environmental parameters is difficult to meet the epidemic control target. Overall, there are the following problems:

[0003] First, the method of user setting control target has single target parameter and unreasonable optimization target. Temperature, carbon dioxide concentration and other physical quantities are often used as control parameters of heating, ventilation and air conditioning equipment. These parameters can be easily obtained and quickly responded by the equipment, but they are difficult to reflect the exposure risk in the virus transmission environment, and it is also difficult for users to select the optimal control target, so that the indoor environment control is difficult to meet the epidemic control target.

[0004] Second, the indoor environment monitoring means is single. The current control considers the whole room according to the lumped parameter method, ignoring the field distribution and pollutant transmission path in the space. However, in the virus transmission environment, the source and transmission path have important influence on the exposure risk of virus. The traditional monitoring means is to measure the indoor environmental parameters by one measuring point in each control unit. This monitoring means is difficult to determine the moving track of the source and the transmission path of the pollutant, so it is difficult to carry out targeted control.

[0005] Third, the monitoring and control ignore the local area, which may underestimate the exposure risk. Another disadvantage of using the lumped parameter method for monitoring and control is that the measuring point position parameter is used as the parameter of the whole control unit, which may underestimate the pollutant concentration in the space near the source and the space that is difficult to purify by ventilation, thus underestimating the exposure risk and making it difficult to carry out targeted control.

[0006] Under the current situation of the new coronavirus epidemic, buildings are enclosed spaces with high personnel density, so the transmission and prevention and control of the new coronavirus in buildings is an important work in the future, and similar viruses transmitted by aerosols have similar needs. Therefore, the present application mainly studies viruses transmitted by aerosols (hereinafter referred to as viruses) and proposes a new technology based on the combination of indoor environmental monitoring and identification of human health characteristics, which can realize the monitoring, tracing and early warning control of virus transmission in buildings. SUMMARY

[0007] The present application aims to provide a building virus transmission monitoring, tracing and early warning control system and method, which overcomes the defects in the prior art that the target parameter is difficult to reflect the virus transmission risk and the indoor environment control is difficult to meet the epidemic prevention control target when the user set environment threshold is taken as the control target and the indoor environment is considered according to the lumped parameter method; the indoor environment monitoring means is single, and it is difficult to judge the moving track of the virus source and the pollutant transmission path; the use of the lumped parameter method for monitoring and control obtains the parameters of the entire control unit, ignores the local environment, and thus underestimates the exposure risk of the virus; and the present application simultaneously adopts a new technology combining building environment monitoring and human health characteristics identification to realize the monitoring, tracing and early warning control of the building virus transmission. The present application is mainly aimed at the virus transmitted by aerosol in the building, and realizes the monitoring, tracing and early warning control of the virus transmission.

[0008] To achieve the above-mentioned purpose, the present application provides a building virus transmission monitoring, tracing and early warning control system, which comprises an environment monitoring system, a virus tracing system, an environment diagnosis and early warning system and a ventilation and purification linkage control system; the environment monitoring system comprises an environment static monitoring system and a dynamic monitoring system;

[0009] The environment static monitoring system is used for monitoring the environmental parameters in and outside the building; the environmental parameters include temperature and humidity and pollutant concentration;

[0010] The dynamic monitoring system is used for monitoring the human physiological indicators, personnel dynamic indicators and indoor object surface temperature field distribution; the personnel dynamic indicators include the droplet transmission track and the personnel moving track;

[0011] The virus tracing system is used for identifying and judging the suspected infected person according to the obtained human physiological indicators to obtain an identification and judgment result; when the identification and judgment result is the suspected infected person, the droplet transmission track and the personnel moving track of the suspected infected person are analyzed to obtain an analysis result, the close contact person is determined according to the analysis result, and countermeasures are taken for the close contact person and the suspected infected person;

[0012] The environment diagnosis and early warning system is used for establishing a current indoor environment field, correcting the current indoor environment field according to the environmental parameters in and outside the building to obtain a current corrected indoor environment field, combining the historical corrected indoor environment field and the droplet transmission track and the personnel moving track of the suspected infected person to perform transmission risk evaluation to obtain a transmission risk evaluation result, and performing high-risk early warning according to the transmission risk evaluation result; the historical corrected indoor environment field is a corrected indoor environment field before the current indoor environment field is established;

[0013] The ventilation and purification linkage control system is used to perform ventilation and purification linkage control based on the identification and judgment results, the analysis results, and the transmission risk assessment results.

[0014] Optionally, the static environmental monitoring system includes a temperature sensor, a humidity sensor, and a pollutant concentration measurement sensor; the dynamic monitoring system includes an infrared camera.

[0015] Optionally, the environmental diagnosis and early warning system includes an indoor environmental field establishment module, an indoor environmental field correction module, and a transmission risk assessment module;

[0016] The indoor environment field establishment module is used to simulate the distribution of indoor environmental parameters using building environment simulation software to establish the current indoor environment field.

[0017] The indoor environmental field correction module: Based on the indoor environmental parameters obtained by the environmental static monitoring system, and combined with the surface temperature field distribution of the object, the established current indoor environmental field is corrected to obtain the current corrected indoor environmental field;

[0018] The transmission risk assessment module is used to calculate the probability of virus transmission occurring indoors based on the current corrected indoor environment, the historical corrected indoor environment, the droplet transmission trajectory of the suspected infected person, and the movement trajectory of the person. The higher the infection probability, the greater the transmission risk, thus achieving the assessment of transmission risk.

[0019] Optionally, an indoor environmental field creation module is used to simulate the distribution of indoor environmental parameters using building environment simulation software to create the current indoor environmental field; specifically, it includes:

[0020] A building physics model is established, and combined with the real-time operating status of building environmental control equipment and real-time location information of personnel, building environmental simulation software is used to simulate the current indoor environmental parameter distribution and establish the current indoor environmental field; the current indoor environmental field includes temperature and humidity field, pollutant concentration field and airflow organization.

[0021] Optionally, the ventilation and purification linkage control system includes an overall control system and a local control system;

[0022] The overall control system is used to perform overall optimization control based on the transmission risk assessment results to achieve overall ventilation and purification of the building.

[0023] The local control system is used to perform local ventilation and purification in areas where the pollutant concentration in the current corrected indoor environment is higher than a set threshold; and to perform local purification and dilution ventilation in areas where suspected infected persons and close contacts are located, thereby achieving local purification treatment targeting the source.

[0024] Optionally, the monitoring, tracing, and early warning control system for virus transmission within a building further includes a ventilation and purification effect evaluation system, used to evaluate the ventilation and purification effect of the ventilation and purification linkage control system; specifically including:

[0025] By establishing an environmental field-time function using the current corrected indoor environmental field and the historical corrected indoor environmental field, the decay rate of pollutant concentration is calculated, and the ventilation and purification effect is evaluated based on the magnitude of the decay rate of pollutant concentration and the current pollutant concentration.

[0026] This invention also provides a method for monitoring, tracing, and early warning control of virus transmission within buildings, comprising the following steps:

[0027] Step 1: Obtain indoor and outdoor environmental parameters of the building, including temperature, humidity and pollutant concentration;

[0028] Acquire human physiological indicators, personnel dynamic indicators, and indoor object surface temperature field distribution; the personnel dynamic indicators include droplet propagation trajectory and personnel movement trajectory.

[0029] Step 2: Identify and judge suspected infected persons based on the obtained human physiological indicators, and obtain the identification and judgment results; when the identification and judgment results are the suspected infected persons, analyze the droplet transmission trajectory and the movement trajectory of the suspected infected persons, obtain the analysis results, determine the close contacts based on the analysis results, and take corresponding measures for the close contacts and the suspected infected persons;

[0030] Step 3: Establish the current indoor environmental field, correct the current indoor environmental field based on the environmental parameters of the building's interior and exterior, and obtain the current corrected indoor environmental field. Combine the historical corrected indoor environmental field with the droplet transmission trajectory and personnel movement trajectory of the suspected infected person to conduct a transmission risk assessment, and obtain the transmission risk assessment result. Issue a high-risk warning based on the transmission risk assessment result; the historical corrected indoor environmental field is the corrected indoor environmental field before the current indoor environmental field was established.

[0031] Step 4: Implement coordinated ventilation and purification control based on the identification and judgment results, the analysis results, and the transmission risk assessment results;

[0032] Step 5: Evaluate the effectiveness of the ventilation and purification linkage control.

[0033] Optionally, the current indoor environmental field is corrected based on the indoor and outdoor environmental parameters of the building. A transmission risk assessment is then performed by combining the historically corrected indoor environmental field with the droplet transmission trajectory and personnel movement trajectory of the suspected infected person, resulting in a transmission risk assessment result. This result specifically includes:

[0034] Establish a building physics model, combine the real-time operation state of the building environment regulation equipment and the real-time positioning information of the personnel, simulate the current indoor environment parameter distribution by using a building environment simulation software, and establish a current indoor environment field; the current indoor environment field includes a temperature and humidity field, a pollutant concentration field, and an air distribution;

[0035] On the basis of the obtained indoor environment parameters, the current indoor environment field established is corrected in combination with the temperature field distribution of the indoor object surface, and the current corrected indoor environment field is obtained.

[0036] According to the current corrected indoor environment field, the historical corrected indoor environment field, and the droplet transmission trajectory and the personnel movement trajectory of the suspected infected person, the infection probability of indoor virus transmission is calculated, the greater the infection probability, the greater the transmission risk, and the transmission risk is evaluated.

[0037] Optionally, according to the identification and judgment result, the analysis result, and the transmission risk evaluation result, ventilation and purification linkage control is performed, specifically including:

[0038] Overall control: overall optimization control is performed on the basis of the transmission risk evaluation result, and building overall ventilation and purification are realized.

[0039] Local control: local ventilation and purification are performed on the area in the current corrected indoor environment field where the pollutant concentration is higher than a set threshold; local purification and dilution ventilation are performed on the area where the suspected infected person is located and the area where the close contact person is located, and local purification treatment is realized for the source.

[0040] Optionally, the ventilation and purification linkage control effect is evaluated, specifically including:

[0041] By means of the current corrected indoor environment field and the historical corrected indoor environment field, an environment field-time function is established, the decay rate of the pollutant concentration is calculated, and the ventilation and purification effect is evaluated according to the size of the decay rate of the pollutant concentration and the size of the current pollutant concentration.

[0042] According to the specific embodiments provided by the present application, the following technical effects are disclosed:

[0043] The application provides a monitoring, tracing and early warning control system and method for virus transmission in a building, which can monitor environmental parameters in and outside the building in real time, acquire human physiological indexes to determine the health status of the human body in real time, acquire the moving track of each person and the droplet transmission track, timely and accurately identify suspected infected persons and close contacts, and timely take measures to cope with the suspected infected persons and the close contacts. In addition, the current indoor environmental transmission risk can be evaluated, the indoor environment is overall ventilated and purified according to the evaluation result of the transmission risk, the area with a pollutant concentration higher than a set threshold in the current corrected indoor environment field is locally ventilated and purified, and the suspected infected persons and the close contacts are locally ventilated and purified effectively to reduce the transmission risk. In addition, the ventilation and purification effect can be evaluated. In summary, the application combines the building indoor environmental parameters, the human health characteristics and the virus transmission risk evaluation, can accurately determine the state of the indoor environment of the building, can timely and accurately identify suspected infected persons and close contacts, and based on the indoor environmental health effect and the state of the suspected infected persons, the indoor overall ventilation and purification and local purification treatment are performed. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0045] Figure 1 A system structure diagram of a monitoring, tracing and early warning control system for virus transmission in a building is provided for the embodiment 1 of the present application.

[0046] Figure 2 A system principle diagram of a monitoring, tracing and early warning control system for virus transmission in a building is provided for the embodiment 1 of the present application.

[0047] Figure 3 A method flow chart of a monitoring, tracing and early warning control method for virus transmission in a building is provided for the embodiment 2 of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0049] The purpose of the present application is to provide a monitoring, tracing and early warning control system and method for virus transmission in buildings, which overcomes the defects in the prior art that the target parameters are difficult to reflect the risk of virus transmission when the indoor environment is considered according to the lumped parameter method, and the control of the indoor environment is difficult to meet the epidemic control target; the indoor environment monitoring means is single, and it is difficult to judge the moving track of the virus source and the transmission path of the pollutants; the use of the lumped parameter method for monitoring and control obtains the parameters of the entire control unit, ignores the local environment, and thus underestimates the exposure risk of the virus, and at the same time, a new technology combining building environment monitoring and human health characteristics identification is adopted to realize the monitoring, tracing and early warning control of virus transmission in buildings.

[0050] In order to make the above-mentioned purpose, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0051] Embodiment 1

[0052] As shown in Figure 1 and 2 , a monitoring, tracing and early warning control system for virus transmission in buildings, comprising an environment monitoring system, a virus tracing system, an environment diagnosis and early warning system and a ventilation and purification linkage control system; the environment monitoring system comprises an environment static monitoring system and a dynamic monitoring system;

[0053] The environment static monitoring system is used for monitoring the environmental parameters in and outside the building; the environmental parameters include but are not limited to temperature, humidity and pollutant concentration;

[0054] The environment static monitoring system includes but is not limited to temperature sensors, humidity sensors and pollutant concentration measuring sensors;

[0055] The pollutant concentration measuring sensors include but are not limited to CO2, PM2.5, formaldehyde and TVOC measuring sensors, and at the same time, the pollutant concentration specifically includes but is not limited to CO2 concentration, PM2.5 concentration, formaldehyde concentration and TVOC concentration;

[0056] In addition, the environment static monitoring system needs to be installed inside and outside the building at the same time, which can monitor the real-time parameters of the indoor and outdoor environment, making the monitored environmental parameters more comprehensive.

[0057] The dynamic monitoring system is used for monitoring the human physiological indicators, personnel dynamic indicators and indoor object surface temperature field distribution; the personnel dynamic indicators include droplet transmission trajectory and personnel moving track;

[0058] The human physiological index can be a human surface temperature or any human physiological feature, and is not limited in the present application; and the personnel dynamic index can include, but is not limited to, a droplet transmission trajectory and a personnel movement trajectory.

[0059] The dynamic monitoring system includes an infrared camera; and in order to flexibly monitor the human physiological index, the personnel dynamic index and the indoor object surface temperature field distribution, other high-precision cameras can also be used, as long as the monitoring requirements can be met, and any device with similar functions is within the protection scope of the present application.

[0060] The virus tracing system is used to identify and judge the suspected infected person according to the acquired human physiological index, to obtain an identification and judgment result; when the identification and judgment result is the suspected infected person, the droplet transmission trajectory and the personnel movement trajectory of the suspected infected person are analyzed to obtain an analysis result, the close contact person is determined according to the analysis result, and the close contact person and the suspected infected person are taken for countermeasures;

[0061] In the present embodiment, the human physiological index is the basic human temperature, and the dynamic monitoring system is an infrared camera; when the infrared camera identifies that the surface temperature of a person is higher than a certain threshold value (such as 37.3 degrees Celsius), the person is determined to be a suspected infected person, and the movement trajectory of the suspected infected person recorded by the infrared camera needs to be analyzed to quickly determine the specific location of the suspected infected person, and the droplet transmission trajectory of the suspected infected person is further analyzed; the personnel appearing in a certain range of the droplet transmission trajectory and the movement trajectory can be determined as the close contact person; at this time, the suspected infected person and the close contact person need to be taken for countermeasures, such as isolation observation or hospitalization treatment, etc. The physiological index and the movement trajectory and the droplet transmission trajectory of the personnel are monitored in real time by using the dynamic monitoring system, so that the suspected infected person and the close contact person can be timely, reliably and accurately identified, and corresponding measures can be taken, so that the virus can be effectively prevented from continuing to spread in the indoor crowd.

[0062] It should be noted that the infrared camera is different from the infrared imager, and can continuously shoot infrared images; through computer vision technology, the relative position relationship and the shape similarity of personnel identification between adjacent two frames can be determined, and the problem of separating personnel after position overlapping has also been technically solved. Therefore, the video obtained by the infrared camera can determine the movement trajectory of different personnel. At the same time, since the target is the suspected infected person, the accuracy of the movement trajectory identification result will be further improved without considering the trajectories of other personnel.

[0063] The identification and response of suspected infected persons includes two parts, i.e., identification of suspected infected persons due to high body temperature and identification of their movement track in the building so that the management personnel can quickly locate and take response measures, wherein the movement track identification result does not directly affect the identification of the infected person, but is reflected in the response measures taken for the suspected infected person.

[0064] The environment diagnosis and early warning system is used to establish a current indoor environment field, correct the current indoor environment field according to the environmental parameters of the building indoor and outdoor, obtain a current corrected indoor environment field, combine a historical corrected indoor environment field and the droplet transmission track and the personnel movement track of the suspected infected person to perform transmission risk assessment, obtain a transmission risk assessment result, and perform high-risk early warning according to the transmission risk assessment result; the historical corrected indoor environment field is a corrected indoor environment field before the current indoor environment field is established;

[0065] The environment diagnosis and early warning system includes an indoor environment field establishment module, an indoor environment field correction module, and a transmission risk assessment module.

[0066] The indoor environment field establishment module is used to simulate the indoor environment parameter distribution by using a building environment simulation software to establish a current indoor environment field.

[0067] Specifically, a building physical model is established, the real-time operation state of the building environment control equipment and the real-time positioning information of the personnel are combined, the building environment simulation software is used to simulate the current indoor environment parameter distribution, and a current indoor environment field is established; the current indoor environment field includes a temperature and humidity field, a pollutant concentration field, and an air flow organization.

[0068] The air flow organization mainly refers to the air flow field distribution in the room, and is mainly obtained by cloud simulation, i.e., by inputting the room model, the air outlet state parameter, the wind speed and air volume, etc. information to obtain by computational fluid dynamics. The air outlet state parameter includes temperature, relative humidity, etc., and for the air outlet parameter of the purifier, it also includes PM2.5 concentration and other parameters; among these state parameters, the temperature has a more significant impact on the air flow organization. Simply speaking, the air flow organization is mainly obtained by using the monitored temperature, air volume, and wind speed as boundary conditions to perform cloud simulation by using computational fluid dynamics under the room model framework.

[0069] The indoor environment field correction module corrects the established current indoor environment field according to the indoor environment parameters obtained by the environment static monitoring system in combination with the object surface temperature field distribution to obtain the current corrected indoor environment field.

[0070] Considering that the current indoor environment field is obtained by an environment simulation software, the relative values thereof are relatively reliable, but the absolute values may be deviated from the true results, therefore, the current indoor environment field needs to be corrected. In the correction, the monitoring point position can be considered in addition to the correction basis given above. In addition, although the actual environment static monitoring system can only arrange one or limited devices in the same space due to the limitation of the number of sensors, and cannot accurately reflect the environment field, the test results thereof are accurate and reliable, and therefore can be used for correcting the simulation results of the environment field.

[0071] Different correction processes can be adopted for different parameters. Here, a relatively simple method is listed. According to the test results of a plurality of sensors in the space, it is considered that the test results are the true values of the corresponding points of the environment field, and the correction values of the points in the space are corrected according to the distance proportion weighting. This method is the simplest correction method, and is only used for clear explanation and description of the correction process in the present application. The correction process involved in the present application can also be other correction methods, and the above correction method does not limit the present application.

[0072] The propagation risk assessment module is configured to calculate an infection probability of virus propagation in the indoor space according to the current corrected indoor environment field, the historical corrected indoor environment field, and the droplet propagation trajectory and the personnel movement trajectory of the suspected infected person, so as to realize the assessment of the propagation risk. The greater the infection probability is, the greater the propagation risk is.

[0073] In the present embodiment, the risk assessment can be performed by calculating the infection probability of virus propagation in the indoor space by using a Wells-Riley model and a pollutant propagation risk model based on dilution ratio, but not limited thereto. The greater the infection probability is, the greater the propagation risk is.

[0074] The ventilation and purification linkage control system is configured to perform ventilation and purification linkage control according to the identification and judgment result, the analysis result, and the propagation risk assessment result.

[0075] The ventilation and purification linkage control system comprises a whole control system and a local control system.

[0076] The whole control system is configured to perform whole optimization control based on the propagation risk assessment result, so as to realize the whole ventilation and purification of the building.

[0077] When the whole propagation risk is low, a low-risk ventilation strategy is adopted to perform the whole ventilation and purification of the building.

[0078] The local control system is configured to perform local ventilation and purification on the area in the current corrected indoor environment field where the pollutant concentration is higher than a set threshold, and to perform local purification and dilution ventilation on the area where the suspected infected person is located and the area where the close contact person is located, so as to realize local purification treatment on the source.

[0079] Since the pollutant concentration in the local area in the current corrected indoor environment field may be higher than the set threshold, so that the local area is in a high pollution state, high pollution local purification needs to be carried out; in addition, since the suspected infected person and the close contact person may be the source of virus transmission, the position where they are located needs to be subjected to source local purification and a rapid dilution ventilation strategy is adopted.

[0080] In order to be able to understand the effect of indoor ventilation and purification in time, the system can also be designed to have a ventilation and purification effect evaluation system for evaluating the ventilation and purification effect of the ventilation and purification linkage control system; specifically comprising:

[0081] Through the current corrected indoor environment field and the historical corrected indoor environment field, an environment field-time function (such as a time sequence of CO2 and PM2.5 parameters) is established, the decay rate of the pollutant concentration is calculated, and the ventilation and purification effect is evaluated according to the size of the decay rate of the pollutant concentration and the size of the current pollutant concentration.

[0082] For the local adjustment ventilation and purification scheme with low decay rate and high current pollutant concentration, rapid and targeted ventilation and purification is realized; in addition, the infection probability of the current indoor virus transmission can also be calculated, and a large infection probability indicates that the ventilation and purification effect is not good, so high-risk early warning needs to be carried out and the ventilation and purification measures need to be adjusted again, for example, the indoor whole is subjected to ventilation and purification, and the high pollution local is subjected to targeted rapid ventilation and purification. In addition, the ventilation and purification effect can also be evaluated by the number of air changes. It should be noted that the above ventilation and purification evaluation parameters do not limit the present application.

[0083] In addition, it should be noted that the current corrected indoor environment field can also be subjected to abnormal state detection, so the environment diagnosis and early warning system can also include an abnormal state detection module, and the abnormal state detection mainly includes two aspects of outlier detection and high concentration detection; wherein, the outlier detection is mainly for the case that the local space environment parameter is too different from other spaces due to unreasonable air flow organization or unreasonable ventilation and purification strategy; the high concentration detection is for the case that part of the parameters of the local space or the whole space deviates from the control domain, which will cause harm to the comfort and health of the personnel.

[0084] For the case of outlier detection, if the local space is located in the personnel activity area and the environmental parameter outlier is not conducive to the health of the personnel, an alarm is given and local ventilation and purification measures are added; if the local space is not located in the personnel activity area and the environmental parameter outlier is not conducive to the health of the personnel, only an alarm is given and the management personnel can add local ventilation and purification measures according to the needs; if the local space is located in the personnel comfort area and the environmental parameter outlier is conducive to the health of the personnel, no ventilation and purification treatment is given.

[0085] For the case of high concentration detection, if the overall space parameter deviates from the control domain, increase the overall ventilation and purification air volume or adjust the supply air parameters to ensure the overall space health and comfort; if the local space parameter deviates from the control domain, adjust the local ventilation and purification air volume or adjust the supply air parameters to ensure the local space health and comfort. For spaces that cannot be adjusted locally, the health and comfort near the real-time location of the personnel are prioritized.

[0086] In this embodiment, the system not only monitors the indoor environmental parameters of the building in real time, but also identifies and judges the health characteristics of the human body in real time. The system can accurately identify suspected infected persons and their close contacts in real time, making the environmental monitoring means more comprehensive and the assessment of the virus transmission risk in the indoor environment more accurate. Based on the indoor environmental health effect and the state of suspected infected persons, the indoor overall ventilation and purification and local purification treatment are carried out, which effectively avoids the rapid spread of viruses among the indoor population and harms the health of people.

[0087] Embodiment 2

[0088] As shown in Figure 3 A method for monitoring, tracing, and early warning and regulation of virus transmission in a building, comprising the following steps:

[0089] Step S1: Obtain indoor and outdoor environmental parameters of the building, the environmental parameters including temperature and humidity and pollutant concentration;

[0090] Obtain human physiological indicators, personnel dynamic indicators, and indoor object surface temperature field distribution; the personnel dynamic indicators include droplet transmission trajectory and personnel movement trajectory;

[0091] Step S2: Identify and judge the suspected infected person according to the obtained human physiological indicators, and obtain an identification and judgment result; when the identification and judgment result is the suspected infected person, analyze the droplet transmission trajectory and the personnel movement trajectory of the suspected infected person, and obtain an analysis result, determine the close contact according to the analysis result, and take measures for the close contact and the suspected infected person;

[0092] Step S3: Establish a current indoor environment field, correct the current indoor environment field according to the indoor and outdoor environmental parameters of the building, obtain a current corrected indoor environment field, combine the historical corrected indoor environment field and the droplet transmission trajectory and the personnel movement trajectory of the suspected infected person to perform a transmission risk assessment, and obtain a transmission risk assessment result, and perform a high-risk early warning according to the transmission risk assessment result; the historical corrected indoor environment field is a corrected indoor environment field before the current indoor environment field is established;

[0093] Specifically, it includes:

[0094] Step S301: Establish a building physics model, combine the real-time operation state of the building environment regulation equipment and the real-time positioning information of the personnel, simulate the current indoor environment parameter distribution by using the building environment simulation software, and establish a current indoor environment field; the current indoor environment field includes a temperature and humidity field, a pollutant concentration field, and an air flow organization;

[0095] Step S302: Based on the obtained indoor environment parameters, the current indoor environment field is corrected in combination with the indoor object surface temperature field distribution to obtain a current corrected indoor environment field.

[0096] Step S303: According to the current corrected indoor environment field, the historical corrected indoor environment field, and the droplet transmission trajectory and the personnel movement trajectory of the suspected infected person, the infection probability of indoor virus transmission is calculated, the greater the infection probability, the greater the transmission risk, and the transmission risk is evaluated.

[0097] Step S4: According to the identification and judgment result, the analysis result and the transmission risk evaluation result, ventilation and purification linkage control is carried out; specifically including:

[0098] Overall control: based on the transmission risk evaluation result, overall optimization control is carried out to realize building overall ventilation and purification;

[0099] Local control: local ventilation and purification is carried out on the area in the current corrected indoor environment field where the pollutant concentration is higher than the set threshold; local purification and dilution ventilation is carried out on the area where the suspected infected person and the close contact person are located, to realize local purification treatment for the source.

[0100] Step S5: The effect of ventilation and purification linkage control is evaluated; specifically including:

[0101] Through the current corrected indoor environment field and the historical corrected indoor environment field, an environment field-time function is established, the decay rate of the pollutant concentration is calculated, and the ventilation and purification effect is evaluated according to the size of the decay rate of the pollutant concentration and the current pollutant concentration.

[0102] In this embodiment, the method can not only monitor the indoor and outdoor environment parameters of the building in real time, but also obtain human physiological indicators to judge the health status of the human body and obtain the movement trajectory and droplet transmission trajectory of each person, identify the suspected infected person and close contact person in time and accurately, and take measures to deal with the suspected infected person and close contact person in time. In addition, the current indoor environment transmission risk can be evaluated, so that reliable ventilation and purification measures can be taken for the indoor environment, the risk of virus transmission can be reduced to the greatest extent, and the health and safety of personnel can be ensured.

[0103] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A monitoring, tracing, and early warning control system for virus transmission within buildings, characterized in that, It includes an environmental monitoring system, a virus tracing system, an environmental diagnosis and early warning system, and a ventilation and purification linkage control system; the environmental monitoring system includes a static environmental monitoring system and a dynamic environmental monitoring system; The environmental static monitoring system is used to monitor indoor and outdoor environmental parameters of the building; the environmental parameters include temperature, humidity and pollutant concentration. The dynamic monitoring system is used to monitor human physiological indicators, personnel dynamic indicators, and the temperature field distribution of indoor object surfaces; the personnel dynamic indicators include droplet transmission trajectories and personnel movement trajectories. The virus tracing system is used to identify and judge suspected infected persons based on the acquired human physiological indicators, and obtain the identification and judgment results; when the identification and judgment results are the suspected infected persons, the droplet transmission trajectory and the personnel movement trajectory of the suspected infected persons are analyzed to obtain the analysis results, close contacts are identified based on the analysis results, and response measures are taken for the close contacts and the suspected infected persons. The environmental diagnosis and early warning system is used to establish the current indoor environmental field, correct the current indoor environmental field according to the environmental parameters of the building's interior and exterior, obtain the current corrected indoor environmental field, combine the historical corrected indoor environmental field with the droplet transmission trajectory and personnel movement trajectory of the suspected infected person to conduct a transmission risk assessment, obtain a transmission risk assessment result, and issue a high-risk early warning based on the transmission risk assessment result; The historically corrected indoor environmental field refers to the corrected indoor environmental field before the establishment of the current indoor environmental field. The environmental diagnosis and early warning system includes an indoor environmental field establishment module, an indoor environmental field correction module, and a transmission risk assessment module. The indoor environment field establishment module is used to simulate the distribution of indoor environmental parameters using building environment simulation software to establish the current indoor environment field. The indoor environmental field correction module: Based on the indoor environmental parameters obtained by the environmental static monitoring system, and combined with the surface temperature field distribution of the object, the established current indoor environmental field is corrected to obtain the current corrected indoor environmental field; The transmission risk assessment module is used to calculate the probability of virus transmission occurring indoors based on the current corrected indoor environment, the historical corrected indoor environment, the droplet transmission trajectory of the suspected infected person, and the movement trajectory of the person. The higher the infection probability, the greater the transmission risk, thus achieving the assessment of transmission risk. The ventilation and purification linkage control system is used to perform ventilation and purification linkage control based on the identification and judgment results, the analysis results, and the transmission risk assessment results. The ventilation and purification linkage control system includes an overall control system and a local control system; The overall control system is used to perform overall optimization control based on the transmission risk assessment results to achieve overall ventilation and purification of the building. The local control system is used to perform local ventilation and purification in areas where the concentration of pollutants in the current corrected indoor environment is higher than a set threshold; and to perform local purification and dilution ventilation in areas where suspected infected persons and close contacts are located, so as to achieve local purification treatment targeting the source. It also includes a ventilation and purification effect evaluation system, used to evaluate the ventilation and purification effect of the ventilation and purification linkage control system; specifically including: By establishing an environmental field-time function using the current corrected indoor environmental field and the historical corrected indoor environmental field, the decay rate of pollutant concentration is calculated, and the ventilation and purification effect is evaluated based on the magnitude of the decay rate of pollutant concentration and the current pollutant concentration. The dynamic monitoring system includes an infrared camera; the video obtained by the infrared camera can determine the movement trajectory of different people. An abnormal state detection module may also be included in the environmental diagnosis and early warning system; Anomaly detection includes two aspects: outlier detection and high concentration detection; Outlier detection addresses situations where local environmental parameters differ significantly from other spaces due to unreasonable airflow organization or ventilation / purification strategies. High-concentration detection addresses situations where some parameters in a local space or the overall space deviate from the control range, potentially harming human comfort and health. For outlier detection, if the local space is located in a personnel activity area and the outlier parameters are detrimental to human health, an alarm will be triggered and local ventilation / purification measures will be implemented. If the local space is not located in a personnel activity area and the outlier parameters are detrimental to human health, only an alarm will be triggered, and management personnel will implement local ventilation / purification measures as needed. If the local space is located in a personnel comfort zone and the outlier parameters are beneficial to human health, no ventilation / purification treatment will be implemented. For high-concentration detection, if the overall space parameters deviate from the control range, increase the overall ventilation and purification air volume or adjust the air supply parameters to ensure the overall space is healthy and comfortable. If the local space parameters deviate from the control range, adjust the local ventilation and purification air volume or adjust the air supply parameters to ensure the local space is healthy and comfortable. For spaces that cannot be specifically adjusted locally, prioritize ensuring the health and comfort of people near their real-time location.

2. The monitoring, tracing, and early warning control system for virus transmission within buildings according to claim 1, characterized in that, The environmental static monitoring system includes a temperature sensor, a humidity sensor, and a pollutant concentration measurement sensor.

3. The monitoring, tracing, and early warning control system for virus transmission within buildings according to claim 1, characterized in that, The indoor environmental field establishment module is used to simulate the distribution of indoor environmental parameters using building environment simulation software and establish the current indoor environmental field; specifically, it includes: A building physics model is established, and combined with the real-time operating status of building environmental control equipment and real-time location information of personnel, building environmental simulation software is used to simulate the current indoor environmental parameter distribution and establish the current indoor environmental field; the current indoor environmental field includes temperature and humidity field, pollutant concentration field and airflow organization.

4. A method for monitoring, tracing, and early warning control of virus transmission within buildings, characterized in that, Includes the following steps: Step 1: Obtain indoor and outdoor environmental parameters of the building, including temperature, humidity and pollutant concentration; Acquire human physiological indicators, personnel dynamic indicators, and indoor object surface temperature field distribution; the personnel dynamic indicators include droplet propagation trajectory and personnel movement trajectory. Step 2: Identify and judge suspected infected persons based on the acquired human physiological indicators, and obtain the identification and judgment results; when the identification and judgment results are the suspected infected persons, analyze the droplet transmission trajectory and the movement trajectory of the suspected infected persons, obtain the analysis results, determine close contacts based on the analysis results, and take corresponding measures for the close contacts and the suspected infected persons; wherein, the movement trajectory of the persons is obtained by judging the video obtained by the infrared camera; Step 3: Establish the current indoor environmental field, correct the current indoor environmental field based on the environmental parameters of the building's interior and exterior, and obtain the current corrected indoor environmental field. Combine the historical corrected indoor environmental field with the droplet transmission trajectory and personnel movement trajectory of the suspected infected person to conduct a transmission risk assessment, and obtain a transmission risk assessment result. Issue a high-risk warning based on the transmission risk assessment result. The historical corrected indoor environmental field is the indoor environmental field that was corrected before the current indoor environmental field was established. The current indoor environmental field is corrected based on the environmental parameters of the building's interior and exterior. A transmission risk assessment is then conducted by combining the corrected indoor environmental field from previous years with the droplet transmission trajectory and personnel movement trajectory of the suspected infected individual. The resulting transmission risk assessment results include: A building physics model is established, and combined with the real-time operating status of building environmental control equipment and real-time personnel location information, building environmental simulation software is used to simulate the current indoor environmental parameter distribution and establish the current indoor environmental field; the current indoor environmental field includes temperature and humidity field, pollutant concentration field and airflow organization; Based on the obtained indoor environmental parameters, the established current indoor environmental field is corrected by combining the temperature field distribution of the indoor object surface, and the current corrected indoor environmental field is obtained. The probability of virus transmission occurring indoors is calculated based on the current corrected indoor environment, the historical corrected indoor environment, the droplet transmission trajectory of the suspected infected person, and the movement trajectory of the person. The higher the probability of infection, the greater the risk of transmission, thus achieving the assessment of transmission risk. Step 4: Implement coordinated ventilation and purification control based on the identification and judgment results, the analysis results, and the transmission risk assessment results; Step 5: Evaluate the effectiveness of the ventilation and purification linkage control; Based on the identification and judgment results, the analysis results, and the transmission risk assessment results, ventilation and purification linkage control is implemented, specifically including: Overall control: Based on the results of the aforementioned transmission risk assessment, overall optimization control is implemented to achieve overall ventilation and purification of the building; Local control: Local ventilation and purification are carried out in areas where the concentration of pollutants in the current corrected indoor environment is higher than a set threshold; local purification and dilution ventilation are carried out in the areas where the suspected infected persons and the close contacts are located, so as to achieve local purification treatment targeting the source; The evaluation of the ventilation and purification linkage control effect specifically includes: By establishing an environmental field-time function using the current corrected indoor environmental field and the historical corrected indoor environmental field, the decay rate of pollutant concentration is calculated, and the ventilation and purification effect is evaluated based on the magnitude of the decay rate of pollutant concentration and the current pollutant concentration. Anomaly detection is performed on the current corrected indoor environmental field. Anomaly detection includes two aspects: outlier detection and high concentration detection. Outlier detection addresses situations where local environmental parameters differ significantly from other spaces due to unreasonable airflow organization or ventilation / purification strategies. High-concentration detection addresses situations where some parameters in a local space or the overall space deviate from the control range, potentially harming human comfort and health. For outlier detection, if the local space is located in a personnel activity area and the outlier parameters are detrimental to human health, an alarm will be triggered and local ventilation / purification measures will be implemented. If the local space is not located in a personnel activity area and the outlier parameters are detrimental to human health, only an alarm will be triggered, and management personnel will implement local ventilation / purification measures as needed. If the local space is located in a personnel comfort zone and the outlier parameters are beneficial to human health, no ventilation / purification treatment will be implemented. For high-concentration detection, if the overall space parameters deviate from the control range, increase the overall ventilation and purification air volume or adjust the air supply parameters to ensure the overall space is healthy and comfortable. If the local space parameters deviate from the control range, adjust the local ventilation and purification air volume or adjust the air supply parameters to ensure the local space is healthy and comfortable. For spaces that cannot be specifically adjusted locally, prioritize ensuring the health and comfort of people near their real-time location.

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