CN117295012A - Indoor positioning system with high measurement accuracy - Google Patents
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- CN117295012A CN117295012A CN202310734748.3A CN202310734748A CN117295012A CN 117295012 A CN117295012 A CN 117295012A CN 202310734748 A CN202310734748 A CN 202310734748A CN 117295012 A CN117295012 A CN 117295012A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 218
- 238000011156 evaluation Methods 0.000 claims description 49
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- 238000004364 calculation method Methods 0.000 claims description 13
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
- G06V20/53—Recognition of crowd images, e.g. recognition of crowd congestion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
- H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
Abstract
The invention discloses an indoor positioning system with high measurement precision, which relates to the technical field of indoor positioning, and comprises an indoor acquisition module, a child monitoring module, a positioning control module, a security prompt module, a display terminal and a database; through monitoring the position of each child in the room, each monitoring child is screened out, and then the monitor picture that each monitoring child corresponds is extracted, the security condition that each monitoring child corresponds is analyzed, each target child is screened out, from this, signal intensity to each surveillance camera head in the room and location basic station is controlled according to target child's position, through combining indoor location and control, the intelligent of children position in the room, automatic and visualized tracking has been realized, the stability of location basic station signal reception and the timeliness of control have been ensured, the safety of children has been greatly improved, the effectual child of preventing is lost or is by the development of sale incident.
Description
Technical Field
The invention relates to the technical field of indoor positioning, in particular to an indoor positioning system with high measurement accuracy.
Background
The indoor positioning is integrated by using various technologies such as wireless communication and base station positioning, so that the position monitoring of personnel, objects and the like in various indoor scenes is realized, and the indoor positioning is often applied to the monitoring of children, thereby preventing the occurrence of the situations such as children loss and the like and guaranteeing the safety of the children.
The positioning system of current indoor scene gathers children's position only to the mobile state of children is not analyzed according to children's position variation, and then the children that need monitor can't be screened out according to children's mobile state, increase system's operation burden, make children monitor the process slowly, can't guarantee children's monitoring real-time, on the other hand, not according to needs children in indoor position, retrieve corresponding monitor picture fast, thereby realize children's position removal visual show, also not according to monitor picture simultaneously, analyze children's security, and then can't know monitoring children's security condition, and also can't realize the control to base station signal according to children's position, can't effectually guarantee positioning base station signal reception's stability, lead to children's position location result's precision not high, can't provide reliable effectual reference for children's position tracking, also can't improve children's safety and parents's experience sense of feeling to a certain extent.
Disclosure of Invention
In view of the above-mentioned technical shortcomings, the present invention aims to provide an indoor positioning system with high measurement accuracy.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides an indoor positioning system with high measurement precision, which comprises an indoor acquisition module, a positioning module and a database, wherein the indoor acquisition module is used for acquiring indoor images corresponding to all children and images corresponding to all guardianship persons through a monitoring camera installed at an indoor entrance when all children enter indoors, taking the acquisition time of the indoor images corresponding to all children as the initial time corresponding to all children, and wearing a positioning tag on each child at the same time, so that the indoor images corresponding to all children and the images corresponding to all guardianship persons of all children are stored in the database;
the child monitoring module is used for distributing a plurality of acquisition moments according to preset time intervals, further acquiring the positions of the positioning labels corresponding to the children in the room at each acquisition moment, analyzing and obtaining the moving speed corresponding to the children at each acquisition moment, further acquiring the positions corresponding to the outlets in the room, and obtaining the distance between the children and the outlets at each acquisition moment, analyzing and judging the moving state corresponding to the children according to the moving speed corresponding to the children at each acquisition moment and the distance between the children and the outlets, and marking the children in the abnormal moving state as monitoring children;
the child monitoring module is used for acquiring monitoring pictures corresponding to all monitoring children in all the acquisition moments, further judging whether all the monitoring children are in a safe state, and if so, marking the monitoring children as target children so as to obtain all the target children;
the positioning control module is used for controlling the signal intensity of each indoor monitoring camera and each positioning base station according to the corresponding position of each target child in each acquisition moment;
the security prompt module is used for acquiring each preset outlet corresponding to each target child according to the position corresponding to each target child in each acquisition moment, and simultaneously sending information to each security personnel user terminal corresponding to each preset outlet corresponding to each target child for prompt;
and the display terminal is used for displaying the monitoring picture and the position of each target child in each acquisition time.
Preferably, the analyzing the movement state corresponding to each child specifically includes the following steps:
based on each acquisition time and the initial time corresponding to each child, obtaining the indoor stay time corresponding to each child in each acquisition time, and marking asWherein i represents the number corresponding to each child, < ->T represents the number corresponding to each acquisition time, < ->；
According to the calculation formulaObtaining the corresponding movement state evaluation coefficient of each child>Wherein->、/>Respectively representing the movement speed corresponding to the ith child in the t-th acquisition time and the distance between the ith child and the jth exit,>the movement speed corresponding to the ith child in the t-1 th acquisition time, a represents a natural number, < ->L, T are respectively the set allowable moving speed difference, the reference distance between the child and the exit, the reference indoor stay time length, and->、/>Respectively set shiftsThe dynamic speed, the weight factor corresponding to the distance between the child and the exit, e represents the natural constant, j represents the number corresponding to each exit, < ->。
Preferably, the determining the movement state corresponding to each child specifically includes the following steps: comparing the movement state evaluation coefficient corresponding to each child with a set movement state evaluation coefficient threshold, if the movement state evaluation coefficient corresponding to a certain child is larger than or equal to the movement state evaluation coefficient threshold, judging that the movement state corresponding to the child is in a normal state, otherwise, judging that the movement state corresponding to the child is in an abnormal state, and judging the movement state corresponding to each child in this way.
Preferably, the determining whether each monitored child is in a safe state includes the following specific determining process:
extracting images of each person from the monitoring images corresponding to each monitoring child in each acquisition time, extracting images of each monitoring person corresponding to each monitoring child in each acquisition time from a database, comparing the images of each person in each monitoring image corresponding to each monitoring child in each acquisition time with the images of each monitoring person, and if the images of each person in each monitoring image corresponding to each monitoring child in a certain acquisition time are different from the images of each monitoring person, marking the monitoring image of each monitoring child in the acquisition time as a target image, counting the number of the target images corresponding to each monitoring child, and marking asWherein->Indicating the corresponding number of each monitored child, +.>；
Simultaneously acquiring images of all people in all target pictures of all monitoring children, and comparing the images of all people in all target pictures of all monitoring children with each other, ifIf the images of a person and a person in the images of the objects corresponding to the monitored children are the same, the person is marked as a target person, and the number of the objects corresponding to the monitored children and the occurrence times of the objects are counted, so that the number of the objects corresponding to the monitored children and the occurrence times of the objects are obtained and respectively marked asAnd->Wherein f represents the number corresponding to each target person, < ->；
Extracting eye states corresponding to all monitoring children from monitoring pictures corresponding to all monitoring children in all collecting moments, if the eye states of all monitoring children in the monitoring pictures corresponding to all monitoring children in a certain collecting moment are closed states, marking the monitoring pictures of all monitoring children in the collecting moment as specified pictures, and marking the number of the specified pictures corresponding to all monitoring children as；
And calculating a safety state evaluation coefficient corresponding to each monitored child through a safety state evaluation coefficient calculation formula, comparing the safety state evaluation coefficient corresponding to each monitored child with a set safety state evaluation coefficient threshold, and judging that the monitored child is in a safety state if the safety state evaluation coefficient corresponding to a certain monitored child is greater than or equal to the safety state evaluation coefficient threshold, otherwise, judging that the monitored child is in a dangerous state, so as to judge whether each monitored child is in the safety state or not.
Preferably, the calculation formula of the safety state evaluation coefficient is:whereinIndicate->The safety state evaluation coefficients corresponding to the monitored children are respectively set up as the number of allowed target pictures, the number of allowed appointed pictures, the number of reference target personnel and the number of occurrences of the reference target personnel, na, nb, R, Q ∈ ->、/>、/>、/>And e represents a natural constant, wherein the weight factors correspond to the set target picture number, the designated picture number, the target personnel number and the target personnel occurrence number respectively.
Preferably, the control of each indoor monitoring camera comprises the following specific control process:
acquiring a monitoring range corresponding to each indoor monitoring camera, comparing the position corresponding to each target child in each acquisition time with the monitoring range corresponding to each monitoring camera, and taking the monitoring camera as the target monitoring camera of each target child in each acquisition time if the position corresponding to a certain target child in a certain acquisition time is within the monitoring range corresponding to a certain monitoring camera, thereby obtaining the target monitoring camera of each target child in each acquisition time;
and extracting the indoor images corresponding to the target children from the database, comparing the indoor images with the images of the personnel in the monitoring pictures corresponding to the target children in the acquisition time, judging that the personnel is the target children if the indoor images corresponding to the target children are the same as the personnel images corresponding to the target children in the monitoring pictures corresponding to the target monitoring cameras in the acquisition time, taking the personnel as the monitoring tracking target of the target children corresponding to the target monitoring cameras in the acquisition time, further monitoring and tracking, and obtaining the monitoring tracking target of the target monitoring cameras corresponding to the target children in the acquisition time in the mode, and simultaneously monitoring and tracking.
Preferably, the signal intensity of each indoor positioning base station is controlled, and the specific control process is as follows:
taking the positions corresponding to the target children in each acquisition time as circle centers, taking the preset distance as radius to form circles, taking the area in the circles as the signal receiving influence area corresponding to the target children in each acquisition time, acquiring each positioning base station in the signal receiving influence area corresponding to the target children in each acquisition time, taking the signal receiving influence area as each target positioning base station, further acquiring the positions of each target child corresponding to each target positioning base station in each acquisition time, thereby obtaining the distance between each target child and each target positioning base station in each acquisition time, and recording asWherein u represents the number corresponding to each target child, < ->R represents the number corresponding to each target positioning base station,/->T represents the number corresponding to each acquisition time, < ->；
Meanwhile, the total personnel number in the signal receiving influence area corresponding to each target child in each acquisition time is obtained from the monitoring picture corresponding to each target child in each acquisition time and is recorded asFurther according to the calculation formulaObtaining signal intensity evaluation coefficients +.f of each target child corresponding to each target positioning base station in each acquisition time>Wherein L represents the radius of the signal reception influence area, M is the set reference total personnel number, e represents the natural constant, +.>Evaluating a compensation factor corresponding to the coefficient for the set signal intensity;
and comparing the signal intensity evaluation coefficient of each target child corresponding to each target positioning base station in each acquisition time with the standard signal intensity of the positioning base station corresponding to the preset signal intensity evaluation coefficient to obtain the standard signal intensity of each target child corresponding to each target positioning base station in each acquisition time, and further adjusting each target child corresponding to each target positioning base station in each acquisition time according to the standard signal intensity.
The invention has the beneficial effects that: according to the indoor positioning system with high measurement accuracy, the positions of all children in the room are monitored, all monitoring children are screened out, and then the monitoring pictures corresponding to all the monitoring children are extracted according to the positions of all the monitoring children, so that the safety conditions corresponding to all the monitoring children are analyzed, all target children are screened out, the signal intensity of all the monitoring cameras and the positioning base stations in the room is controlled according to the positions of the target children, and meanwhile information is sent to security personnel for prompting.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the system structure of the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an indoor positioning system with high measurement accuracy includes an indoor collection module, a child monitoring module, a positioning control module, a security prompt module, a display terminal and a database.
The database is respectively connected with the indoor collection module, the child monitoring module and the child monitoring module, and the positioning control module is respectively connected with the child monitoring module, the security prompt module and the display terminal.
The indoor collection module is used for collecting indoor images corresponding to all children and images corresponding to all guardianship persons through the monitoring cameras installed at the indoor entrances when all children enter the indoor, taking the collection time of the indoor images corresponding to all children as the initial time corresponding to all children, and wearing the positioning tag on all children at the same time, so that the indoor images corresponding to all children and the images corresponding to all guardianship persons corresponding to all children are stored in the database.
The child monitoring module is used for distributing a plurality of acquisition moments according to preset time intervals, further acquiring the positions of the positioning labels corresponding to the children in the room at each acquisition moment, analyzing and obtaining the moving speed corresponding to the children at each acquisition moment, further acquiring the positions corresponding to the outlets in the room, and obtaining the distance between the children and the outlets at each acquisition moment, analyzing and judging the moving state corresponding to the children according to the moving speed corresponding to the children at each acquisition moment and the distance between the children and the outlets, and marking the children in the abnormal moving state as monitoring children;
in the above, the movement speed corresponding to each child at each collection time is obtained by analysis, and the specific analysis process is as follows: according to the calculation formulaObtaining the corresponding moving speed of each child at each collecting momentWherein->Representing the movement distance corresponding to the ith child between the t-th acquisition time and each t-1 acquisition time,indicating the interval duration between adjacent acquisition moments, i indicating the number corresponding to each child, ++>T represents the number corresponding to each acquisition time, < ->。
In a specific embodiment, the movement state corresponding to each child is analyzed, and the specific analysis process is as follows:
based on each acquisition time and the initial time corresponding to each child, obtaining the indoor stay time corresponding to each child in each acquisition time, and marking asWherein i represents the number corresponding to each child, < ->T represents the number corresponding to each acquisition time, < ->；
According to the calculation formulaObtaining the corresponding movement state evaluation coefficient of each child>Wherein->、/>Respectively representing the movement speed corresponding to the ith child in the t-th acquisition time and the distance between the ith child and the jth exit,>the movement speed corresponding to the ith child in the t-1 th acquisition time, a represents a natural number, < ->L, T are respectively the set allowable moving speed difference, the reference distance between the child and the exit, the reference indoor stay time length, and->、/>E represents a natural constant, j represents a number corresponding to each exit, and +.>。
In another specific embodiment, the movement state corresponding to each child is determined, and the specific determination process is as follows: comparing the movement state evaluation coefficient corresponding to each child with a set movement state evaluation coefficient threshold, if the movement state evaluation coefficient corresponding to a certain child is larger than or equal to the movement state evaluation coefficient threshold, judging that the movement state corresponding to the child is in a normal state, otherwise, judging that the movement state corresponding to the child is in an abnormal state, and judging the movement state corresponding to each child in this way.
The child monitoring module is used for acquiring monitoring pictures corresponding to all monitoring children in all the acquisition moments, further judging whether all the monitoring children are in a safe state, and if so, marking the monitoring children as target children so as to obtain all the target children;
the specific acquisition process is as follows: and acquiring a monitoring area corresponding to each monitoring camera in the room from a monitoring center, comparing the corresponding position of each monitoring child in each acquisition time with the monitoring area corresponding to each monitoring camera, extracting a monitoring picture corresponding to each acquisition time from the monitoring record of the monitoring camera if the corresponding position of each monitoring child in a certain acquisition time is in the monitoring area of each monitoring camera, and taking the monitoring picture as the monitoring picture corresponding to each monitoring child in the acquisition time, thereby acquiring the monitoring picture corresponding to each monitoring child in each acquisition time.
It should be noted that the monitoring areas of the indoor monitoring cameras are different.
In a specific embodiment, the specific judging process is as follows:
extracting images of each person from the monitoring images corresponding to each monitoring child in each acquisition time, extracting images of each monitoring person corresponding to each monitoring child in each acquisition time from a database, comparing the images of each person in each monitoring image corresponding to each monitoring child in each acquisition time with the images of each monitoring person, and if the images of each person in each monitoring image corresponding to each monitoring child in a certain acquisition time are different from the images of each monitoring person, marking the monitoring image of each monitoring child in the acquisition time as a target image, counting the number of the target images corresponding to each monitoring child, and marking asWherein->Indicating the corresponding number of each monitored child, +.>；
Simultaneously acquiring images of all persons in all target pictures of all monitoring children, comparing the images of all persons in all target pictures of all monitoring children with each other, if the images of a person in all target pictures corresponding to a certain monitoring child are the same as the images of a person in all target pictures, marking the person as a target person, counting the number of the target persons corresponding to the monitoring children and the number of occurrence times of all target persons, and obtaining the number of the target persons corresponding to all monitoring children and the number of occurrence times of all target persons respectively as followsAndwherein f represents the number corresponding to each target person, < ->；
Extracting eye states corresponding to all monitoring children from monitoring pictures corresponding to all monitoring children in all collecting moments, if the eye states of all monitoring children in the monitoring pictures corresponding to all monitoring children in a certain collecting moment are closed states, marking the monitoring pictures of all monitoring children in the collecting moment as specified pictures, and marking the number of the specified pictures corresponding to all monitoring children as；
In the above, the eye states corresponding to the monitored children are extracted from the corresponding monitoring pictures of the monitored children at each collecting time, and the specific analysis process is as follows: and acquiring eye images of each monitoring child in each acquisition time from a monitoring picture corresponding to each monitoring child in each acquisition time, and comparing the eye images with a standard image set corresponding to each eye state stored in a database to obtain the eye state of each monitoring child in each acquisition time.
The eye state includes an open state and a closed state.
And calculating a safety state evaluation coefficient corresponding to each monitored child through a safety state evaluation coefficient calculation formula, comparing the safety state evaluation coefficient corresponding to each monitored child with a set safety state evaluation coefficient threshold, and judging that the monitored child is in a safety state if the safety state evaluation coefficient corresponding to a certain monitored child is greater than or equal to the safety state evaluation coefficient threshold, otherwise, judging that the monitored child is in a dangerous state, so as to judge whether each monitored child is in the safety state or not.
In another specific embodiment, the calculation formula of the security state evaluation coefficient is:wherein->Represent the firstThe safety state evaluation coefficients corresponding to the monitored children are respectively set up as the number of allowed target pictures, the number of allowed appointed pictures, the number of reference target personnel and the number of occurrences of the reference target personnel, na, nb, R, Q ∈ ->、/>、/>、/>And e represents a natural constant, wherein the weight factors correspond to the set target picture number, the designated picture number, the target personnel number and the target personnel occurrence number respectively.
The positioning control module is used for controlling the signal intensity of each indoor monitoring camera and each positioning base station according to the corresponding position of each target child in each acquisition moment;
in a specific embodiment, each indoor monitoring camera is controlled, and the specific control process is as follows: acquiring a monitoring range corresponding to each indoor monitoring camera, comparing the position corresponding to each target child in each acquisition time with the monitoring range corresponding to each monitoring camera, and taking the monitoring camera as the target monitoring camera of each target child in each acquisition time if the position corresponding to a certain target child in a certain acquisition time is within the monitoring range corresponding to a certain monitoring camera, thereby obtaining the target monitoring camera of each target child in each acquisition time;
and extracting the indoor images corresponding to the target children from the database, comparing the indoor images with the images of the personnel in the monitoring pictures corresponding to the target children in the acquisition time, judging that the personnel is the target children if the indoor images corresponding to the target children are the same as the personnel images corresponding to the target children in the monitoring pictures corresponding to the target monitoring cameras in the acquisition time, taking the personnel as the monitoring tracking target of the target children corresponding to the target monitoring cameras in the acquisition time, further monitoring and tracking, and obtaining the monitoring tracking target of the target monitoring cameras corresponding to the target children in the acquisition time in the mode, and simultaneously monitoring and tracking.
In another specific embodiment, the signal strength of each indoor positioning base station is controlled, and the specific control process is as follows: taking the positions corresponding to the target children in each acquisition time as circle centers, taking the preset distance as radius to form circles, taking the area in the circles as the signal receiving influence area corresponding to the target children in each acquisition time, acquiring each positioning base station in the signal receiving influence area corresponding to the target children in each acquisition time, taking the signal receiving influence area as each target positioning base station, further acquiring the positions of each target child corresponding to each target positioning base station in each acquisition time, thereby obtaining the distance between each target child and each target positioning base station in each acquisition time, and recording asWherein u represents the number corresponding to each target child, < ->R represents the number corresponding to each target positioning base station,/->T represents the number corresponding to each acquisition time, < ->；
Meanwhile, the total personnel number in the signal receiving influence area corresponding to each target child in each acquisition time is obtained from the monitoring picture corresponding to each target child in each acquisition time and is recorded asFurther according to the calculation formulaObtaining signal intensity evaluation coefficients +.f of each target child corresponding to each target positioning base station in each acquisition time>Wherein L represents the radius of the signal reception influence area, M is the set reference total personnel number, e represents the natural constant, +.>Evaluating a compensation factor corresponding to the coefficient for the set signal intensity;
and comparing the signal intensity evaluation coefficient of each target child corresponding to each target positioning base station in each acquisition time with the standard signal intensity of the positioning base station corresponding to the preset signal intensity evaluation coefficient to obtain the standard signal intensity of each target child corresponding to each target positioning base station in each acquisition time, and further adjusting each target child corresponding to each target positioning base station in each acquisition time according to the standard signal intensity.
The security prompt module is used for sending the positions corresponding to the target children in each acquisition time to each security personnel user terminal of each outlet and prompting;
it should be noted that the user terminal includes, but is not limited to, a smart phone and a smart band.
And the display terminal is used for displaying the monitoring picture and the position of each target child in each acquisition time.
The database is used for storing the image of each child in the room and the image of each guardian corresponding to each child, and storing the standard image set corresponding to each eye state.
According to the invention, the positions of all children in the room are monitored, all monitoring children are screened out, and then the monitoring pictures corresponding to all monitoring children are extracted according to the positions of all monitoring children, so that the safety conditions corresponding to all monitoring children are analyzed, all target children are screened out, the signal intensity of all monitoring cameras and positioning base stations in the room is controlled according to the positions of the target children, and meanwhile, information is sent to security personnel for prompting.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An indoor positioning system with high measurement accuracy, comprising:
the child monitoring module is used for distributing a plurality of acquisition moments according to preset time intervals, further acquiring the positions of the positioning labels corresponding to the children in the room at each acquisition moment, analyzing and obtaining the moving speed corresponding to the children at each acquisition moment, further acquiring the positions corresponding to the outlets in the room, and obtaining the distance between the children and the outlets at each acquisition moment, analyzing and judging the moving state corresponding to the children according to the moving speed corresponding to the children at each acquisition moment and the distance between the children and the outlets, and marking the children in the abnormal moving state as monitoring children;
the child monitoring module is used for acquiring monitoring pictures corresponding to all monitoring children in all the acquisition moments, further judging whether all the monitoring children are in a safe state, and if so, marking the monitoring children as target children so as to obtain all the target children;
the positioning control module is used for controlling the signal intensity of each indoor monitoring camera and each positioning base station according to the corresponding position of each target child in each acquisition moment;
the security prompt module is used for sending the positions corresponding to the target children in each acquisition time to each security personnel user terminal of each outlet and prompting;
and the display terminal is used for displaying the monitoring picture and the position of each target child in each acquisition time.
2. The indoor positioning system with high measurement accuracy according to claim 1, further comprising an indoor acquisition module, wherein the indoor acquisition module is used for acquiring an indoor image corresponding to each child and an image corresponding to each guardian through a monitoring camera installed at an indoor entrance when each child enters the indoor, taking the acquisition time of the indoor image corresponding to each child as the initial time corresponding to each child, and wearing a positioning tag on each child at the same time, so that the indoor image corresponding to each child and the image corresponding to each guardian of each child are stored in the database.
3. The indoor positioning system with high measurement accuracy according to claim 2, wherein the analysis of the movement state corresponding to each child is performed by the following specific analysis process:
based on each acquisition time and the initial time corresponding to each child, obtaining the indoor stay time corresponding to each child in each acquisition time, and marking as i represents the number corresponding to each child, and t represents the number corresponding to each acquisition time;
obtaining a movement state evaluation coefficient corresponding to each child according to a calculation formula, wherein the movement state evaluation coefficient respectively represents the movement speed corresponding to the ith child in the t-th acquisition time and the distance between the ith child and the jth exit, the movement speed corresponding to the ith child in the t-1 th acquisition time, a represents a natural number, L, T respectively represent a set allowable movement speed difference, the distance between a reference child and the exit and the reference indoor stay time, respectively represent a set movement speed and a weight factor corresponding to the distance between the child and the exit, e represents a natural constant, and j represents the number corresponding to each exit.
4. A high-measurement-accuracy indoor positioning system according to claim 3, wherein the determining of the movement state corresponding to each child comprises the following specific determining process: comparing the movement state evaluation coefficient corresponding to each child with a set movement state evaluation coefficient threshold, if the movement state evaluation coefficient corresponding to a certain child is larger than or equal to the movement state evaluation coefficient threshold, judging that the movement state corresponding to the child is in a normal state, otherwise, judging that the movement state corresponding to the child is in an abnormal state, and judging the movement state corresponding to each child in this way.
5. The high-measurement-accuracy indoor positioning system according to claim 1, wherein the determining whether each monitored child is in a safe state comprises the following steps:
extracting images of all persons from monitoring pictures corresponding to all monitoring children in all acquisition moments, extracting images of all monitoring persons corresponding to all monitoring children in a database, comparing the images of all persons in the monitoring pictures corresponding to all monitoring children in all acquisition moments with the images of all monitoring persons, and if the images of all persons in the monitoring pictures corresponding to all monitoring children in a certain acquisition moment are different from the images of all monitoring persons, marking the monitoring pictures of all monitoring children in the acquisition moment as target pictures, counting the number of the target pictures corresponding to all monitoring children, and marking the number corresponding to all monitoring children as numbers;
simultaneously acquiring images of all persons in all target pictures by all monitoring children, comparing the images of all persons in all target pictures by all monitoring children, if the images of a person in all target pictures corresponding to a certain monitoring child are the same as the images of a person in all target pictures, marking the person as a target person, and counting the number of the target persons corresponding to the monitoring children and the number of occurrence times of all target persons, so as to obtain the number of the target persons corresponding to all monitoring children and the number of occurrence times of all target persons, respectively marking the number as a sum, wherein f represents the number corresponding to each target person;
extracting eye states corresponding to all monitoring children from monitoring pictures corresponding to all monitoring children in all the acquisition moments, and if the eye states of the monitoring children in the monitoring pictures corresponding to all the monitoring children in a certain acquisition moment are closed states, marking the monitoring pictures of the monitoring children in the acquisition moment as specified pictures, and marking the number of the specified pictures corresponding to all the monitoring children as the number of the specified pictures;
and calculating a safety state evaluation coefficient corresponding to each monitored child through a safety state evaluation coefficient calculation formula, comparing the safety state evaluation coefficient corresponding to each monitored child with a set safety state evaluation coefficient threshold, and judging that the monitored child is in a safety state if the safety state evaluation coefficient corresponding to a certain monitored child is greater than or equal to the safety state evaluation coefficient threshold, otherwise, judging that the monitored child is in a dangerous state, so as to judge whether each monitored child is in the safety state or not.
6. The high measurement accuracy indoor positioning system according to claim 5, wherein the calculation formula of the safety state evaluation coefficient is: the Na, nb, R, Q is a weight factor corresponding to the set number of allowed target pictures, the set number of allowed designated pictures, the set number of reference target persons and the set number of occurrences of the reference target persons, the set number of target pictures, the set number of designated pictures, the set number of target persons and the set number of occurrences of the target persons, and e is a natural constant.
7. The indoor positioning system with high measurement accuracy according to claim 1, wherein the control of each indoor monitoring camera comprises the following specific control processes:
acquiring a monitoring range corresponding to each indoor monitoring camera, comparing the position corresponding to each target child in each acquisition time with the monitoring range corresponding to each monitoring camera, and taking the monitoring camera as the target monitoring camera of each target child in each acquisition time if the position corresponding to a certain target child in a certain acquisition time is within the monitoring range corresponding to a certain monitoring camera, thereby obtaining the target monitoring camera of each target child in each acquisition time;
and extracting the indoor images corresponding to the target children from the database, comparing the indoor images with the images of the personnel in the monitoring pictures corresponding to the target children in the acquisition time, judging that the personnel is the target children if the indoor images corresponding to the target children are the same as the personnel images corresponding to the target children in the monitoring pictures corresponding to the target monitoring cameras in the acquisition time, taking the personnel as the monitoring tracking target of the target children corresponding to the target monitoring cameras in the acquisition time, further monitoring and tracking, and obtaining the monitoring tracking target of the target monitoring cameras corresponding to the target children in the acquisition time in the mode, and simultaneously monitoring and tracking.
8. The indoor positioning system with high measurement accuracy according to claim 7, wherein the signal intensity of each indoor positioning base station is controlled by the following specific control process:
taking the position corresponding to each target child in each acquisition time as a circle center, taking a preset distance as a radius to form a circle, taking an area in the circle as a signal receiving influence area corresponding to each target child in each acquisition time, acquiring each positioning base station in the signal receiving influence area corresponding to each target child in each acquisition time, taking the signal receiving influence area as each target positioning base station, and further acquiring the position of each target positioning base station corresponding to each target child in each acquisition time, thereby obtaining the distance between each target child and each target positioning base station in each acquisition time, and recording as a number u corresponding to each target child, a number r corresponding to each target positioning base station, a number t corresponding to each acquisition time;
meanwhile, the total personnel number in the signal receiving influence area corresponding to each target child in each acquisition time is obtained from the monitoring picture corresponding to each target monitoring camera in each acquisition time, and is recorded as the total personnel number, and then the signal intensity evaluation coefficient of each target positioning base station corresponding to each target child in each acquisition time is obtained according to a calculation formula, wherein L represents the radius of the signal receiving influence area, M represents the set reference total personnel number, e represents a natural constant and is a compensation factor corresponding to the set signal intensity evaluation coefficient;
and comparing the signal intensity evaluation coefficient of each target child corresponding to each target positioning base station in each acquisition time with the standard signal intensity of the positioning base station corresponding to the preset signal intensity evaluation coefficient to obtain the standard signal intensity of each target child corresponding to each target positioning base station in each acquisition time, and further adjusting each target child corresponding to each target positioning base station in each acquisition time according to the standard signal intensity.
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| CN117793628B (en) * | 2024-02-26 | 2024-05-07 | 微澜能源(江苏)有限公司 | Hydropower station visitor positioning method and device |
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