CN113434786A - Method and device for rapidly identifying close contact personnel of confirmed patient based on time-space sequence retrieval - Google Patents

Method and device for rapidly identifying close contact personnel of confirmed patient based on time-space sequence retrieval Download PDF

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CN113434786A
CN113434786A CN202010210372.2A CN202010210372A CN113434786A CN 113434786 A CN113434786 A CN 113434786A CN 202010210372 A CN202010210372 A CN 202010210372A CN 113434786 A CN113434786 A CN 113434786A
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patient
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梁循
薛扬
弭宝瞳
梁靖平
马跃峰
周小平
阮进
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Beijing Jushi Intelligent Technology Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/90—Details of database functions independent of the retrieved data types
    • G06F16/95—Retrieval from the web
    • G06F16/953—Querying, e.g. by the use of web search engines
    • G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/80—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for detecting, monitoring or modelling epidemics or pandemics, e.g. flu

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Abstract

The invention relates to a method and a device for quickly identifying close contact personnel of a diagnosed patient based on time-space sequence retrieval, which is characterized in that the method for quickly identifying the close contact personnel of the diagnosed patient based on the time-space sequence retrieval is characterized by comprising the following steps: 1) the government department requires everyone in the public to install epidemic situation close contact person detection software on a mobile phone. 2) The software may utilize bluetooth ranging technology to store a close contact record of the user over a time space, constituting a time-space sequence of information. 3) After a virus carrier has been diagnosed, the relevant department has access to recall the patient's close contact information and label the patient. 4) The system searches the time-space sequence information according to a pre-designed rule, judges whether the infection risk exists or not according to different scenes, and gives out the potential infection probability, namely, the potential infection factor is contacted. The method can be widely applied to quickly identify closely contacted people with infection risks in special periods such as epidemic periods.

Description

Method and device for rapidly identifying close contact personnel of confirmed patient based on time-space sequence retrieval
Technical Field
The invention relates to a method for quickly identifying epidemic situation close contact personnel based on space-time sequence retrieval, belongs to the technical field of computers, and is suitable for quickly finding out the close contact personnel of a patient to be diagnosed in a special period such as an epidemic situation period.
Background
During the epidemic period, the virus is easy to infect, can be transmitted by aerosol, has longer latent period and can be transmitted in the latent period, so the epidemic is easy to spread. Once a patient is diagnosed, if the patient is not known to carry viruses and is in close contact with other people before the patient is diagnosed, or if asymptomatic infected persons take various vehicles to pass through many places in a short period of time under the condition of unknown illness, the number of infected persons is easy to increase exponentially and is difficult to control.
The epidemic situation is controlled in stages at present, but the danger of the overseas input type epidemic situation still exists and is unknown, particularly for large cities. In this case, it is extremely important to quickly find the relevant person who is in close contact with the patient after the patient has been diagnosed.
When solving the problem, the method can be used for searching through various methods and channels. Firstly, the most widely used method is to make the diagnostician recall his/her own travel information and then send the information in a broad way in society to make the public search, which belongs to the zhugenliang method, on one hand, there may be a long time delay, which causes the close contact person who may carry viruses to make close contact with other people during the period, so as to accelerate the diffusion of viruses, on the other hand, the travel information recalled by this method may have errors, for example, the diagnostician takes a subway or other public transportation means, and on the basis of only the time information, it is difficult for others to confirm whether the travel information has been taken by the diagnostician, which also brings certain difficulty for the search of the close contact person, and in the search process, there may be a crowd who does not make close contact with the diagnostician to misunderstand that there is an infection risk, thereby causing panic. In addition to this search method, it is also possible to search by means of big data, and to find a person near the location of the diagnostician by checking the moving range of the diagnostician over several days through a positioning system or by checking the location of the diagnostician through a related map company, but this method still has the problems of being inaccurate and difficult to grasp about the length of time that the same location has been reached, for example, if the patient passes through the road, then the person in the roadside automobile belongs to a close contact person. Moreover, the searching method has the problems of long consumed time and large consumed resources due to large data size. In conclusion, the widely-scattered searching method has certain effect, but only has the significance of providing rough reference, and more people who are not in close contact can be reached, so that the panic of people can be caused. Therefore, how to quickly find the close contact person after the diagnosis of the virus carrier is confirmed is very important, and the invention considers that the problem is solved by a method which is accurate, quick and has controllable resource consumption.
Disclosure of Invention
In view of the above problems, the present invention provides a method and apparatus for quickly identifying close-contact persons of patients diagnosed based on spatio-temporal sequence search, which can quickly find the close-contact persons of related persons during a special period, such as an epidemic situation.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for quickly identifying close contact personnel of a diagnosed patient based on spatiotemporal sequence retrieval is characterized by comprising the following steps:
1) related organizations such as government departments require that everyone in the public installs the epidemic situation close contact detection software on a mobile phone in a special period such as an epidemic situation period, and the software can carry out distance measurement through a Bluetooth method.
2) The software can record all the contacters within two meters of the mobile phone with the software, and each contacter is recorded with the contact duration. In addition, the software can record the information of personnel who appear in the same closed space together within two hours, and the definition of the closed space can be introduced into related map companies. Thus, for each user, the software may store the corresponding time-space series information.
3) After a virus carrier confirms diagnosis, the epidemic situation control department has the right to check the crowd in close contact with the virus carrier by calling the information of the software on the patient, and the public medical institution and the epidemic situation control department can label the patient on the software.
4) The system searches the stored time-space sequence information according to a pre-designed rule so as to judge whether infection risks exist, considers the inconsistent contact risks caused by different contact scenes and divides the scenes into two types of closed spaces and non-closed spaces: for an unsealed space, if the distance | D is contacted1-D2If the absolute value is less than two meters, the next judgment is carried out, the Euclidean distance is adopted for the calculation of the distance, and the Euclidean distance is adopted for D1(x1，y1) And D2(x1，y1) The distance can be expressed as
Figure BSA0000204642240000021
If the contact time T of two persons is shorter than 3 seconds, i.e. T < 3s, the probability of infection is low, and if the contact time is longer than 3 seconds, i.e. T ═ 3s, there is a high probability of infection; for a closed space, the time | T for two people to arrive in the space1-T2Within 2 hours, i.e. | T1-T2If | is less than 2h, there is a high probability of infection. According to different contact scenes, the software gives the potential infection probability of different people, the probability is called as the contact potential infection factor, and the identification method can exclude a plurality of special cases.
Preferably, in step 1), the software can perform ranging by a bluetooth method, and when the software is installed on a mobile phone of each person, the software automatically sets bluetooth to a "receiving" mode, and meanwhile, relevant organizations can require the public to set bluetooth to a "receiving" mode after installing the software in a legal manner, and after a special period of time is over, the relevant organizations can cancel the setting.
Preferably, in the step 2), the software can record all the contacts within two meters of the mobile phone where the software is installed, wherein each person is represented by a unique code, only public medical institutions and epidemic situation control departments have the right to acquire the real identity of the person, and people cannot know the specific information of the person who is in close contact with the software, and only can see whether the code is represented and is a patient to be diagnosed.
Preferably, in the step 2), the software may record all the contacts within two meters of the mobile phone on which the software is installed, the recorded information belongs to privacy information, in order to protect the privacy of the citizen, the record of each person exists on the mobile phone of the citizen, and the public medical institution and the epidemic situation control department have access to call the record only when the diagnosis is confirmed.
Preferably, in the step 4), the system judges whether there is infection risk according to a pre-designed rule, and considering that the contact risks are inconsistent due to different contact scenes, it is ensured that a correct judgment can be made in different contact scenes, for example, if the patient is a pedestrian on the road, and if other people sit in an automobile and get within two meters of the patient and leave the patient in the process of moving fast, it can be judged that the situation does not belong to a contacter with high infection probability, and this point can be judged from the fact that the contact time is very short, and if the situation and the patient appear near the same ATM within two hours, it can be judged that the situation belongs to a close contacter with high infection probability.
A device for rapidly identifying close contact persons of a diagnosed patient based on spatiotemporal sequence search, comprising: the contact recording module based on Bluetooth ranging is used for recording the time-space sequence information of close contact between people and other people during an epidemic situation, records of each person are stored in the mobile phone of the people, and after a diagnosed patient appears, a public medical institution and an epidemic situation control department have the right to call data; the information marking module of the diagnostician is only open to the public medical department and the epidemic situation control department and is used for marking the diagnostician patient, so that the public can conveniently check whether the diagnostician contacts the patient too closely or not in time, and if the diagnostician contacts the patient too closely, the position and the duration of the close foundation can be checked; the infection probability detection module is used for helping citizens analyze whether infection risks exist, analyzing duration and position data when the citizens closely contact patients through preset rules, assisting the citizens to judge whether the probability of infection exists, and enabling the data to be checked by the citizens.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention can make a response immediately after a confirmed patient appears by recording the close contact behavior of each person, thereby avoiding the situation of Zhuge brightness after the occurrence of the situation, greatly shortening the searching time of the close contact person and having great practical significance for controlling the epidemic situation. 2. According to the invention, the information record of the individual and the mobile phone of the public are rewarded, on one hand, the problems of processing difficulty and the like caused by over-centralized data are avoided, so that the search of the close contact person is more targeted, on the other hand, the individual privacy of the public is also protected, and only after the close contact person becomes a diagnostician, the public medical institution and the epidemic situation control department have the right to call the data. 3. Under the condition that the current urgent need of the repeated production and the repeated work is urgent to need economic restarting, the method of the invention is very necessary, and can provide psychological guarantee and confidence guarantee for the repeated production and the repeated work as large as possible from the government perspective or the individual perspective, thereby having certain contribution to the society.
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FIG. 1 is a diagram of the process of using the software by the public and public health care institutions and epidemic control departments of the present invention.
FIG. 2 is a decision flow diagram of the software for determining the probability of infection using location and time information. Wherein D is1And D2Indicates the position of two persons, | D1-D2L represents the distance between two persons, the distance is calculated by Euclidean distance, T represents the contact duration of the two persons, and T represents the contact duration of the two persons1And T2Represents the time of two persons arriving at the same closed space, | T1-T2And | represents the time difference between two persons arriving at the same closed space.
Detailed Description
The present invention is described in detail below with reference to the attached drawings. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention. In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
A simple explanation of the bluetooth ranging technique is:
the basic idea of using the bluetooth technology for ranging is as follows: distance measurements are made based on Signal field Strength Indication (RSSII) values. Because bluetooth communication is a short distance and low-power consumption's wireless transmission technology, to holding the mobile terminal equipment who has integrateed the bluetooth function, as long as the bluetooth function of this mobile equipment opens, bluetooth ranging system just can judge the distance apart from this mobile equipment.
The Bluetooth ranging is used as a main ranging means, on one hand, the Bluetooth ranging is low in cost, at present, the Bluetooth function is provided on the mobile phone of each person, the relative distance between two mobile phones can be easily detected for the two mobile phones with Bluetooth simultaneously started, meanwhile, the Bluetooth ranging is high in precision, the requirement for detection of close contact within two meters can be met, meanwhile, the method has high penetrability and anti-interference capability, and the Bluetooth technology is mature and stable at present. In the special period of epidemic situation, the Bluetooth distance measurement technology can achieve the detection effect of being accurate and low in cost, greatly saves resources while ensuring the detection accuracy, and is suitable for the distance measurement requirement of the invention.
The invention provides a method for quickly identifying close contact personnel of a patient to be diagnosed based on time-space sequence retrieval, which comprises the following steps:
1) related organizations such as government departments require that everyone in the public installs the epidemic situation close contact detection software on a mobile phone in a special period such as an epidemic situation period, and the software can carry out distance measurement through a Bluetooth method.
2) The software can record all the contacters within two meters of the mobile phone with the software, and each contacter is recorded with the contact duration. In addition, the software can record the information of personnel who appear in the same closed space together within two hours, and the definition of the closed space can be introduced into related map companies. Thus, for each user, corresponding time-space sequence information may be stored.
3) After a virus carrier confirms diagnosis, the epidemic situation control department has the right to check the crowd in close contact with the virus carrier by calling the information of the software on the patient, and the public medical institution and the epidemic situation control department can label the patient on the software.
4) The system searches the stored time-space sequence information according to a pre-designed rule so as to judge whether infection risks exist, considers the inconsistent contact risks caused by different contact scenes and divides the scenes into two types of closed spaces and non-closed spaces: for an unsealed space, if the distance | D is contacted1-D2If the absolute value is less than two meters, the next judgment is carried out, the Euclidean distance is adopted for the calculation of the distance, and the Euclidean distance is adopted for D1(x1，y1) And D2(x1，y1) The distance can be expressed as
Figure BSA0000204642240000041
If the contact time T of two persons is shorter than 3 seconds, i.e. T < 3s, the probability of infection is low, and if the contact time is longer than 3 seconds, i.e. T ═ 3s, there is a high probability of infection; for a closed space, the time | T for two people to arrive in the space1-T2Within 2 hours, i.e. | T1-T2If | is less than 2h, there is a high probability of infection. According to different contact scenes, the software gives the potential infection probability of different people, the probability is called as the contact potential infection factor, and the identification method can exclude a plurality of special cases. Therefore, when a country formulates a policy, different measures can be taken according to the probability, such as forced isolation with high probability and self-isolation with low probability at home.
In the step 1), related organizations such as government departments require that each person of the people installs the epidemic situation changing close contact person detection software on the mobile phone in a special period such as an epidemic situation period, and in the special period, the related departments can make some forced means such as closing a city and the like, so that the people can be forced to install the software for effectively controlling the epidemic situation, and before the special period is finished, if the Bluetooth is turned off or the software is refused to be used in a trip, the corresponding legal responsibility needs to be carried out. In order to check the software installation condition of the citizen energy and ensure the whole installation, when the public installs the software, the government authorization code needs to be obtained by inputting the mobile phone number and sending the verification code, the central server of the government can detect the active account, but does not need to store the mobile phone track record, and if the public unloads the software privately, the government can know the authorization code. After the epidemic situation is over, the software is unloaded by the government authorization, and the records are automatically deleted together when the software is unloaded, so that after the epidemic situation is over, the citizen does not have the right to access the software and cannot check the records.
In the step 1), the software uses the bluetooth ranging technology, when the software is installed on the mobile phone of each person, the bluetooth is automatically set to be in a receiving mode, meanwhile, related organizations can require the public to set the bluetooth to be in the receiving mode after the software is installed, and after a special period is finished, the related organizations can cancel the setting.
In the step 2), the software can record all the contacters within two meters of the mobile phone with the software, wherein each person is represented by a unique code, only public medical institutions and epidemic situation control departments have the right to acquire the real identity of the contacter, people cannot know the specific information of the contacter who is in close contact with the public medical institutions and can only see the code representation and whether the contacter is a confirmed patient, and therefore the function of protecting the public privacy is achieved.
In the step 2), the software can record all the contacts within two meters of the mobile phone with the software installed, the recorded information belongs to privacy information, in order to protect the privacy of the citizens, the record of each person exists on the mobile phone of the citizens, and the public medical institution and the epidemic situation control department can call the record only when the diagnosis is confirmed. The software can continuously record in the period that the epidemic situation is ended, records in the last 40 days are kept in a rolling mode, after the records are fully stored for 40 days, the records before the records are covered are stored, and a user cannot delete the records by himself.
In the step 4), the system judges whether the infection risk exists according to a pre-designed rule, and the inconsistency of the contact probabilities caused by the difference of the contact scenes is considered, so that the correct judgment can be made in different contact scenes, for example, if the patient is a pedestrian on the road, and if other people sit in an automobile and are within two meters of the distance from the patient and leave the automobile in the quick moving process, the condition can be judged not to belong to a contacter with low infection probability, and the condition can be judged from the very short contact time, and if the other people and the patient appear near the same ATM within two hours, the condition can be judged to belong to a close contact person with high infection probability.
In the application scenario of the invention, the software can autonomously make different decisions for different close contact scenarios. For example, if the patient is a pedestrian on the road, other people sitting in the automobile can get to or less than two meters away from the patient in the process of fast moving, and although the people can be recorded, the analysis of the contact time and the contact position can judge that the personnel in the automobile are not in the range of close contact and infection risk. In addition, considering the possibility of aerosol infection due to infection, special treatment should be performed for enclosed spaces such as ATMs and elevators, and if a confirmed patient is present in such enclosed spaces, people present in the enclosed space within two hours should belong to persons with a high probability of infection, and for open spaces such as parks and squares, the special treatment is not required, and for the acquisition of enclosed spaces, special treatment of the enclosed location in the software can be performed by means of a relevant map company.
Based on the method for quickly identifying the close contact personnel of the diagnosed patient based on the time-space sequence retrieval, the invention also provides a device for quickly identifying the close contact personnel of the diagnosed patient based on the time-space sequence retrieval, which comprises the following steps:
the contact recording module based on Bluetooth ranging is used for recording the time-space sequence information of close contact between people and other people during an epidemic situation, records of each person are stored in the mobile phone of the people, and after a diagnosed patient appears, a public medical institution and an epidemic situation control department have the right to call data; the information marking module of the diagnostician is only open to the public medical department and the epidemic situation control department and is used for marking the diagnostician patient, so that the public can conveniently check whether the diagnostician contacts the patient too closely or not in time, and if the diagnostician contacts the patient too closely, the position and the duration of the close foundation can be checked; the infection probability detection module is used for helping citizens analyze whether infection risks exist, analyzing duration and position data when the citizens closely contact patients through preset rules, assisting the citizens to judge whether the probability of infection exists, and enabling the data to be checked by the citizens.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims (6)

1. A method for quickly identifying close contact personnel of a diagnosed patient based on spatiotemporal sequence retrieval is characterized by comprising the following steps:
1) related organizations such as government departments require that everyone in the public installs the epidemic situation close contact detection software on a mobile phone in a special period such as an epidemic situation period, and the software can carry out distance measurement through a Bluetooth method.
2) The software can record all the contacters within two meters of the mobile phone with the software, and each contacter is recorded with the contact duration. In addition, the software can record the information of personnel who appear in the same closed space together within two hours, and the definition of the closed space can be introduced into related map companies. Thus, for each user, the software may store the corresponding time-space series information.
3) After a virus carrier confirms diagnosis, the epidemic situation control department has the right to check the crowd in close contact with the virus carrier by calling the information of the software on the patient, and the public medical institution and the epidemic situation control department can label the patient on the software.
4) The system searches the stored time-space sequence information according to the pre-designed rule, thereby judging whether the infection risk exists or not and considering the different contact scenesThe contact risks are inconsistent, and scenes are divided into two types of closed spaces and non-closed spaces: for an unsealed space, if the distance | D is contacted1-D2If the | is less than two meters, the next judgment is carried out, the Euclidean distance is adopted for the calculation of the distance, and the Euclidean distance D is adopted for the calculation of the D1(x1，y1) And D2(x2，y2) The distance can be expressed as
Figure RE-FSB0000187001850000011
If the contact time T of two persons is shorter than 3 seconds, i.e. T < 3s, the probability of infection is low, and if the contact time is longer than 3 seconds, i.e. T ═ 3s, there is a high probability of infection; for a closed space, the time | T for two people to arrive in the space1-T2Within 2 hours, i.e. | T1-T2If | is less than 2h, there is a high probability of infection. According to different contact scenes, the software gives the potential infection probability of different people, the probability is called as the contact potential infection factor, and the identification method can exclude a plurality of special cases.
2. The method for rapidly identifying closely-contacting persons of a patient diagnosed based on spatio-temporal sequence search as claimed in claim 1, wherein said step 1) comprises the steps of measuring distance by bluetooth, automatically setting bluetooth to ' receive ' mode when the software is installed in each person's mobile phone, and legally requiring the public to set bluetooth to ' receive ' mode after the software is installed, and canceling the setting after a specific period of time.
3. The method for rapidly identifying the close contact person of the confirmed patient based on the spatio-temporal sequence search as claimed in claim 1, wherein in the step 2), the software can record all the contacts within two meters of the mobile phone on which the software is installed, wherein each person is represented by a unique code, only public medical institutions and public security departments have the right to obtain the true identity of the person, and people cannot know the specific information of the close contact person and only can see the code representation and whether the patient is the confirmed patient.
4. The method for rapidly identifying closely-contacted persons of a patient diagnosed based on spatio-temporal sequence search as claimed in claim 1, wherein in the step 2), the software can record all the persons contacted with the mobile phone installed with the software within two meters, the recorded information belongs to privacy information, in order to protect the privacy of citizens, the record of each person exists on the mobile phone of the citizens, and the public medical institution and the public security department have access to call the record only when the diagnosis is confirmed.
5. The method for rapidly identifying close contact persons of a patient to be diagnosed based on spatio-temporal sequence search as claimed in claim 1 is particularly characterized in that in the step 4), the system judges whether the infection risk exists according to a pre-designed rule, and the inconsistency of the contact risks caused by different contact scenes is considered, so that the system can make a correct judgment under different contact scenes, for example, if the patient is a pedestrian on the road, other people sit in an automobile and are within two meters of the patient during the rapid movement process, and do not belong to a contacter with high infection probability, which can be judged from the short contact time, and if the patient appears near the same ATM within two hours, the patient belongs to a close contact person with high infection probability.
6. A device for rapidly identifying close contact persons of a diagnosed patient based on spatiotemporal sequence search, comprising:
the contact recording module based on Bluetooth ranging is used for recording the time-space sequence information of close contact between people and other people during an epidemic situation, records of each person are stored in the mobile phone of the people, and after a confirmed patient appears, public medical institutions and public security departments have the right to call the mobile phone data of the confirmed patient;
the information marking module of the diagnostician is only open to public medical departments and public security departments and is used for marking the diagnostician patient, so that the public can conveniently check whether the diagnostician contacts the patient too closely or not in time, and if the diagnostician contacts the patient too closely, the position and the duration of the close basis can be checked;
the infection probability detection module is used for helping citizens analyze whether infection risks exist, analyzing duration and position data when the citizens closely contact patients through preset rules, assisting the citizens to judge whether the probability of infection exists, and enabling the data to be checked by the citizens.
CN202010210372.2A 2020-03-23 2020-03-23 Method and device for rapidly identifying close contact personnel of confirmed patient based on time-space sequence retrieval Pending CN113434786A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114913990A (en) * 2022-06-10 2022-08-16 西安电子科技大学 Respiratory infectious disease close contact target tracking method based on privacy protection
CN118658636A (en) * 2024-08-19 2024-09-17 科普云医疗软件(深圳)有限公司 Infection risk assessment method and system for nursing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114913990A (en) * 2022-06-10 2022-08-16 西安电子科技大学 Respiratory infectious disease close contact target tracking method based on privacy protection
CN114913990B (en) * 2022-06-10 2024-05-14 西安电子科技大学 Method for tracking respiratory infectious disease close-contact target based on privacy protection
CN118658636A (en) * 2024-08-19 2024-09-17 科普云医疗软件(深圳)有限公司 Infection risk assessment method and system for nursing

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