CN115334452B - Centralized building intelligent alarm method - Google Patents
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- CN115334452B CN115334452B CN202211237508.4A CN202211237508A CN115334452B CN 115334452 B CN115334452 B CN 115334452B CN 202211237508 A CN202211237508 A CN 202211237508A CN 115334452 B CN115334452 B CN 115334452B
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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
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
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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
- H04W4/30—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
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Abstract
A centralized building intelligent alarm method belongs to the intelligent alarm field and comprises the following steps: calculating two-dimensional coordinates of the label according to the ranging information uploaded by the base stations; updating the fence state of the label according to the two-dimensional coordinates of the label and in combination with the two-dimensional coordinates of all the vertexes of all the fences; and if the fence state of the tag is not 0 and the fence state is not in the permission authority of the tag, giving an alarm. The invention constructs a centralized building intelligent alarm method and system by using a positioning and fence mode, and can determine whether the label is in the fence or not by simply calculating the relationship between the two-dimensional coordinates of the label and the two-dimensional coordinates of the top point of the fence.
Description
Technical Field
The invention belongs to the field of intelligent alarm, and particularly relates to a centralized building intelligent alarm method.
Background
In the building work progress, safety protection and dangerous early warning all stop in the aspect of subjective judgments such as constructor's conscious guard and safety inspection manual supervision, have following several aspects of reason: (1) The safety management of a construction enterprise is weak, and the enterprise does not have strict implementation and execution on the safety management system; (2) Constructors have low personnel quality, and have the condition that civil workers can be operated on duty without safe on duty training, and do not have the general knowledge of safe production; (3) The inspection personnel can not observe and pre-judge the safety risk in real time and without dead angles. Easily cause casualties and property loss in the construction process of buildings.
A centralized building intelligent early warning/alarming system is arranged for the safety of single/multiple building personnel and the production safety in a construction area, and for the safety construction and the safety inspection of auxiliary safety inspectors, the environmental safety of the construction area is upgraded from subjective judgment to objective judgment (intelligent early warning/alarming system) and the monitoring of the subjective double-layer insurance of the safety inspectors, so that the safety early warning coefficient in the production process is greatly improved, and the accident potential of the construction site is reduced.
In construction areas, it is often necessary to enclose some hazardous areas with railings, banners, etc. to prevent irrelevant people from stepping into them. However, in consideration of the irregularity of the quality of the persons, it is generally necessary to give an alarm to the persons stepping into the danger area and notify the background staff of the awareness.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to solve the defects and further provides a centralized building intelligent alarm method.
The invention adopts the following technical scheme.
The invention discloses a first aspect of a centralized building intelligent alarm method, which comprises the following steps: calculating two-dimensional coordinates of the label according to the ranging information uploaded by the base stations; updating the fence state of the label according to the two-dimensional coordinates of the label and in combination with the two-dimensional coordinates of all the vertexes of all the fences; and if the fence state of the tag is not 0 and the fence state is not in the permission authority of the tag, giving an alarm.
Compared with the prior art, the invention has the following advantages:
(1) The invention constructs a centralized building intelligent alarm method and system by using a positioning and fence mode, and can determine whether the label is in the fence by simply calculating the relationship between the two-dimensional coordinates of the label and the two-dimensional coordinates of the top point of the fence.
(2) The invention also considers the special attribute of the fence, namely false alarm and missing report caused by inaccurate distance measurement information when the label approaches the fence due to the fact that whether the fence is shielded or not. By analyzing historical ranging information, partial false reports and missing reports are effectively avoided.
Drawings
Fig. 1 is a schematic diagram of a centralized building intelligent alarm system.
Fig. 2A is a schematic distribution diagram of a fence, a tag and a base station according to an embodiment of the disclosure.
Fig. 2B is a schematic distribution diagram of another fence, tag and base station according to an embodiment of the disclosure.
Fig. 3 is a flow chart of a centralized building intelligent alarm method.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
From the background, it is known that, in the building construction, there are often areas into which non-related persons are prohibited, for example: hazardous areas mentioned in the background. Therefore, when irrelevant persons mistakenly enter the area, a timely alarm is required.
Based on this, the invention firstly provides a centralized building intelligent alarm system, which comprises: a terminal, a plurality of base stations and a plurality of tags, as shown in fig. 1.
In fig. 1, the base stations are typically distributed around the building. It will be appreciated that a plurality of base stations may be distributed throughout each floor of the building. The tag is worn on the body of each person entering the construction building, and can be a helmet, a wristwatch, a worker's card and the like. In some embodiments, the tag may be a tamper resistant wristwatch.
The indoor positioning method can be realized as follows: the two-dimensional coordinate of the label can be obtained through the ranging information of at least 3 base stations and the label and the two-dimensional coordinate of the base stations.
In some embodiments, the indoor positioning method may include: ranging circle method, least square method, etc. The simple description is made by the distance measuring circle method: at least three base stations (e.g., base station B2001, base station B2002, and base station B2003 shown in fig. 1) are generally provided indoors, and for any one tag (e.g., tag 103 shown in fig. 1), the base station (e.g., base station B2001 shown in fig. 1) can obtain ranging information (e.g., d1 shown in fig. 1) to the tag. By drawing a ranging circle from ranging information between two base stations (e.g., base station B2001, base station B2002 shown in fig. 1) and a tag, two intersections generated by the intersection of two circles (e.g., a circle having base station B2001 as the center, a circle having d1 as the radius, and a circle having base station B2002 as the center and d2 as the radius) can determine that the location of the tag is at one of the two intersections, and a third base station (e.g., base station B2003 shown in fig. 1) assists in the determination with the ranging information of the tag, thereby locking to which intersection is the end. In general, in order to obtain a good positioning effect, the base station is preferentially arranged at each corner of the room, so as to ensure that the label falls inside the polygon enclosed by the base station as much as possible.
The terminal at least comprises: a logic processing module and a database.
The logic processing module is used for establishing a scene, wherein the scene at least comprises a dangerous area, and storing the relevant information of the established scene in a database for subsequent calling. For example, a floor of a construction building includes 2 dangerous areas, which are areas surrounded by A1 to A5 and areas surrounded by B1 to B3, as shown in fig. 2A. Therefore, the related information for establishing the scene at least includes: two-dimensional coordinates of base stations B2001-B2004, two-dimensional coordinates of vertexes A1-A5, and two-dimensional coordinates of vertexes B1-B3. For convenience, 2 dangerous areas are collectively called as fences, and then the area surrounded by A1-A5 is fence01, and the area surrounded by B1-B3 is fence02.
Table 1 shows the way in which the pens are stored in the database. For example: the two-dimensional coordinates of B1 to B3 in the spence 02 are (38.2, 18.3), (40.3, 9.8) and (50.6, 10.1) in this order.
TABLE 1
| Number of pens | Two-dimensional coordinate information of fence |
| 01 | (5.2, 21.3);(10.6, 24.1);(21.3, 21.8);(18.7, 16.1);(8.2, 15.8) |
| 02 | (38.2, 18.6);(50.2, 10.4);(40.3, 9.5) |
| 03 | (35.3, 18.9);(50.6, 17.3);(50.4, 3.2);(31.6, 2.9) |
Typically, position is the recording of the vertices that make up the fence in a clockwise direction, for example: in the event 02, if the first recorded coordinate is a two-dimensional coordinate of B1, the subsequent coordinates are B3 and B2.
Table 2 shows the manner in which the tags are stored in the database. Combining 2A and 2B, if the tag is not in any fence, the fence status is 0; if the label is in a certain fence, the fence state is the label of the fence. When the tag 102 enters the nonce 01, since the permission right "01. And accordingly, label 503 has no licensing rights. Entry of label 503 into the nonce 03 triggers an alarm.
TABLE 2
| Tag ID | Fence status | Licensing rights for |
| 102 | 01 | 01:02 |
| 103 | 0 | 01:02:03 |
| 501 | 0 | |
| 502 | 0 | 03 |
| 503 | 03 |
It is readily understood that one tag cannot be in 2 pens at the same time.
Based on this, the invention discloses a centralized building intelligent alarm method, as shown in fig. 3, comprising the following steps:
step 1, calculating two-dimensional coordinates of the label according to the ranging information uploaded by the base stations.
And 2, updating the fence state of the label according to the two-dimensional coordinates of the label and by combining the two-dimensional coordinates of all the vertexes of all the fences.
And 3, if the fence state of the tag is not 0 and the fence state is not in the permission authority of the tag, giving an alarm.
Wherein, step 2 specifically includes:
and 2.1, for any fence, acquiring two-dimensional coordinates of all vertexes of the fence from a database.
And 2.2, calculating the angle from the label to each vertex according to the position information of the label and the two-dimensional coordinates of all the vertexes of the fence.
Wherein,
express the label to
The angle of each of the vertices is such that,
is as follows
The coordinates of the individual vertices of the three-dimensional object,
in terms of the two-dimensional coordinates of the tag, it is noted that,
is limited to
In between.
Step 2.3, sequencing all the angles from small to large to obtain difference values with the same number as the angles; wherein the last difference is the smallest angle plus
The maximum angle is subtracted.
It is understood that if the number of vertices is 4, and
in turn is
、
、
、
Then the difference is sequentially
、
、
、
。
And 2.4, determining the maximum difference value from all the difference values.
Step 2.5, if the maximum difference value is larger than
Updating the fence state of the label to be the label of the fence, and jumping to the step 3; otherwise, updating the fence state of the tag to be 0, and returning to the step 2.1 to continuously judge other fences.
Understandably, when the label happens to be on the boundary of the fence, the maximum difference is exactly
。
However, in practical scenarios, the danger area is more a closed room, that is, the fence can be a real wall or other obstacle, such as the lancet 03 in fig. 2B. Under the condition, the shielding of the wall can cause the numerical value of the ranging information between the base station and the label to be increased, so that the two-dimensional coordinate of the label is inaccurate, and the false alarm and the false missing alarm of the alarm are further caused.
Thus, step 2.4 also includes:
step 2.4.1, if the fence has shielding and the maximum difference value is less than
Judging the distance between the label and the line segment formed by the 2 vertexes according to the 2 vertexes corresponding to the maximum difference value; if the distance is less than
Then the tag and the fence are marked simultaneously.
Note that information as to whether the fence is occluded or not is pre-stored in the database.
It should be noted here that steps 1 to 3 of the present invention are performed by polling continuously. That is to say, according to the frequency of the ranging information, step 1 to step 3 are executed for each tag, so that whether the tag is in the fence can be judged in real time, and therefore real-time alarm is given. Therefore, the data in steps 1 to 3 executed in the front wheel can be regarded as historical data, and the above-mentioned mark should also be limited to the mark in which round of executing steps 1 to 3.
Wherein,
are all fixed values, and are all fixed values,
must be less than
Can get
An equal value;
can take 5m, representing the distance of the tag to the fence.
Note that: the maximum difference is obtained by subtracting 2 angles, so that 2 vertexes corresponding to the maximum difference are vertexes corresponding to 2 angles corresponding to the maximum difference respectively.
Therefore, the present invention improves step 1.
First, in the indoor positioning method, regardless of the circle of the ranging or the least square method, it is necessary to use the ranging information between the base station and the tag as the input of the positioning. In fact, one tag can have ranging information with dozens of base stations at the same time. In the indoor positioning method, the ranging information is generally sorted from small to large, the ranging information with too large distance is filtered, and 3 base stations with smaller ranging information are adopted as the ranging base stations, so that the two-dimensional coordinate of the tag is calculated. The "smaller" rather than the "smallest" is used because the positional relationship of the ranging base stations also needs to be considered. If 3 base stations with the minimum distance measurement information are in straight line distribution, replacement is needed; if the 3 base stations with the minimum ranging information are distributed in a regular triangle, the 3 base stations are the ranging base stations.
And 2.4.2, if the label is marked in the previous round, obtaining a plurality of groups of historical ranging information of the label and each ranging base station, and determining a group of optimal historical ranging information.
Understandably, the historical ranging information is the ranging information in the previous rounds of the steps 1 to 3.
It is assumed here that the number of ranging stations is 3, and the two-dimensional coordinates thereof are sequentially
、
、
The multiple groups of ranging information of the tag and the 3 ranging base stations are respectively from back to front according to the time stamps
，
，
，
8230; wherein,
current ranging information and others are sets of historical ranging information.
Generally, in order to prevent the data delay from being too high, the number of the plurality of sets of historical ranging information is generally 3 to 5.
The best historical ranging information is determined by the fact that the sum of squares of the distance between the corresponding two-dimensional coordinates of the tag and the ranging base station calculated by the set of historical ranging information and the value of the set of historical ranging information is the minimum. As shown in the following formula:
wherein,
is the first
Group historical ranging information
The two-dimensional coordinates of the calculated tag,
is the first
The two-dimensional coordinates of each ranging base station,
is the first
Group history ranging information
Ranging information of the individual ranging base stations,
to measure the number of base stations, in this embodiment,
。
the purpose of the above formula is to draw from multiple groups
Is determined to be unique
So that the value of the min function is minimized
。
Step 2.4.3, the optimal historical distance measurement information is obtained
With current ranging information
And (4) carrying out comparison and judgment: if it is
And is
And is
Sequentially judging the vertex in the fence to the first one
Maximum value of a ranging base station
And minimum value
，
If, if
And is
And is
If yes, updating the fence status of the tag to be the label of the fence, and jumping to step 3.
From the apex to the second of the fence
Maximum value of a ranging base station
And minimum value
The formula of (1) is:
wherein max and min are the maximum and minimum signs.
The above-mentioned situation that belongs to the optimal, when every present range finding information all is greater than best historical range finding information, must mean that all range finding information have all suffered the sheltering from, can judge basically that the label must enter into the rail.
Wherein,
the predetermined fixed positive number is determined by the accuracy of the indoor positioning method, and may be usually 0.5m to 1m.
In general, the base station is not set up in the fence in order to secure the coverage of the base station. More importantly, unless at least 3 base stations are arranged in the fence, the base stations in the fence and the base stations outside the fence are matched for ranging, and the position information of the tag is more difficult to accurately obtain. The specific principle can not be similar to that of the old and new batteries, and the description is omitted here. Thus, all base stations are located outside the enclosure.
Step 2.4.4, if
Sequentially calculating 3 distance differences respectively
，
，
(ii) a Removing the maximum distance difference from the 3 distance differences, repositioning the label through the remaining 2 distance differences, obtaining 2 new two-dimensional coordinates of the label, and selecting the second two-dimensional coordinate from the 2 new two-dimensional coordinates
Group historical ranging information
Replacing the two-dimensional coordinates of the label in the step 1 by the two-dimensional coordinates with the calculated two-dimensional coordinates closer to the two-dimensional coordinates of the label, returning to the step 2.1 for re-execution, wherein the step 2.4 only executes to determine the maximum difference from all the difference valuesThe value is obtained. That is, after returning to step 2.1 and executing again, the steps 2.4.1 to 2.4.4 are not performed again.
In this case, not all the ranging information has a problem, but one of the ranging information is too large to cause inaccuracy in the two-dimensional coordinates of the tag. Therefore, the invention screens out wrong ranging information by comparing the historical ranging information with the current ranging information, and uses the correct ranging information to reposition so as to prevent false alarm or missing alarm.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for the purpose of limiting the scope of the present invention, and on the contrary, any modifications or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (4)
1. A centralized building intelligent alarm method comprises the following steps:
step 1, calculating two-dimensional coordinates of a tag according to ranging information uploaded by a plurality of base stations;
step 2, updating the fence state of the label according to the two-dimensional coordinates of the label and in combination with the two-dimensional coordinates of all vertexes of all fences;
the step 2 specifically comprises the following steps:
step 2.1, for any fence, acquiring two-dimensional coordinates of all vertexes of the fence from a database;
step 2.2, calculating the angle from the label to each vertex according to the position information of the label and the two-dimensional coordinates of all the vertexes of the fence;
step 2.3, sorting all the angles from small to large to obtain the difference values with the same number as the angles; wherein the last difference is the smallest angle plus
Subtracting the maximum angle;
step 2.4, determining the maximum difference value from all the difference values;
step 2.5, if the maximum difference value is larger than
Updating the fence state of the label to be the label of the fence, and jumping to the step 3; otherwise, updating the fence state of the tag to be 0, and returning to the step 2.1 to continuously judge other fences;
and 3, if the fence state of the tag is not 0 and the fence state is not in the permission right of the tag, giving an alarm.
2. The intelligent alarm method for centralized buildings according to claim 1, characterized in that the label in step 2.2 is up to the first
Angle of each vertex
Is a vector
The angle of (d);
wherein,
is as follows
The coordinates of the individual vertices of the three-dimensional object,
is a two-dimensional coordinate of the label,
is limited to
In the meantime.
3. The intelligent alarm method for centralized buildings according to claim 1, wherein the step 2.4 further comprises:
step 2.4.1, if the fence has shielding and the maximum difference value is less than
Judging the distance between the label and the line segment formed by the 2 vertexes according to the 2 vertexes corresponding to the maximum difference value; if the distance is less than
Marking the label and the fence at the same time;
step 2.4.2, if the label is marked in the previous round, obtaining a plurality of groups of historical ranging information of the label and each ranging base station, and determining a group of optimal historical ranging information;
step 2.4.3, the optimal historical distance measurement information is obtained
With current ranging information
And (4) comparing and judging: if it is
And is
And is provided with
Sequentially judging the top point to the second point in the fence
Maximum value of a ranging base station
And minimum value
，
If, if
And is provided with
And is provided with
If yes, updating the fence state of the label to be the label of the fence, and jumping to the step 3;
step 2.4.4, if
Sequentially calculating 3 distance differences respectively
，
，
(ii) a Removing the maximum distance difference from the 3 distance differences, repositioning the label through the remaining 2 distance differences, obtaining 2 new two-dimensional coordinates of the label, and selecting the second two-dimensional coordinate from the 2 new two-dimensional coordinates
Group historical ranging information
And replacing the two-dimensional coordinates of the label in the step 1 by the two-dimensional coordinates which are closer to the calculated two-dimensional coordinates of the label, returning to the step 2.1, and re-executing, wherein the step 2.4 only executes to determine the maximum difference value from all the difference values.
4. The intelligent alarm method for centralized buildings according to claim 3, wherein the top to the second in the fence
Maximum value of a ranging base station
And minimum value
The formula of (1) is:
wherein max and min are the maximum and minimum signs.
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