CN114419831A - Rectangular offshore inter-electric early-stage smoke generation source positioning method - Google Patents

Rectangular offshore inter-electric early-stage smoke generation source positioning method Download PDF

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CN114419831A
CN114419831A CN202210013479.7A CN202210013479A CN114419831A CN 114419831 A CN114419831 A CN 114419831A CN 202210013479 A CN202210013479 A CN 202210013479A CN 114419831 A CN114419831 A CN 114419831A
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smoke
active sampling
coordinate
coordinates
smoke generating
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CN114419831B (en
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张敏
刘龙
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Bomesc Offshore Engineering Co Ltd
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Bomesc Offshore Engineering Co Ltd
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    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means

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Abstract

The invention discloses a rectangular offshore inter-electric early smoke generating source positioning method which comprises the arrangement of array active sampling pipes and a rectangular offshore inter-electric early smoke generating source positioning weighting algorithm. The method realizes the detection of indoor smoke concentration by combining a rectangular array active sampling pipe network with a smoke detector, and calculates the coordinates of the position of the early-stage smoke generating source in the rectangular maritime electric room by matching with a weighting algorithm which takes the smoke concentration of sampled air as the weight of the coordinates. The method reduces the smoke detection time of the offshore electric room, and simultaneously positions the smoke generating source through a weighting algorithm, thereby providing more scientific basis and rapid response capability for fire fighting of the electric room.

Description

Rectangular offshore inter-electric early-stage smoke generation source positioning method
Technical Field
The invention relates to an early stage smoke generating source positioning method, in particular to an early stage smoke generating source positioning method of an offshore platform.
Background
The fire early warning system of the offshore platform plays an important role in guaranteeing the life of personnel and facility equipment safety of the offshore platform, the photoelectric/ion type smoke detector used in the traditional fire alarm system is limited by the manufacturing principle, the smoke detector is installed at the top of an electric inter-floor, the distance is relatively high, meanwhile, the smoke reaches the top by means of self diffusion of the smoke, the smoke has relatively high concentration, the alarm can be given when the smoke reaches the alarm threshold value of the smoke detector, and the fire response time is long; because the existing fire protection standard does not have the function of origin positioning through smoke signals, only the local part inside an electric room can be alarmed, and the safety and the production of the offshore platform are seriously threatened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a rectangular maritime electric room early smoke generating source positioning method capable of quickly determining a smoke area.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for positioning an early smoke generating source of a rectangular offshore electric room comprises the following steps:
the method comprises the following steps that firstly, a plurality of active sampling pipes are mounted on a ceiling, each active sampling pipe penetrates through a hole in the ceiling to be fixed and extends out of the ceiling by 15-20 cm, the circle centers of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed in total, the distance between the central axes of two adjacent active sampling pipes is 2-3 m, and the distance between the outermost active sampling pipe and the adjacent side wall surface of the offshore electrical room is 0.8-1 m;
a plurality of active sampling pipes positioned on the same row of the rectangular array are used as a group of active sampling pipes, each group of active sampling pipes are connected with an air pump through a distribution valve, an industrial control host is connected with each distribution valve through a data line, and the jth sampling pipe connected with the ith distribution valve is marked as NijThe air pump extracts air sampled by different active sampling pipes through the active sampling pipes and the distribution valves to enter the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial personal computer through a data line, a smoke concentration matrix with m rows and N columns is arranged in the industrial personal computer, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector extracts the smoke from the active sampling pipes NijWhen the detected smoke concentration is sent into the industrial control host through the data line, the ith row and jth column elements in the smoke concentration matrix are replaced by the smoke concentration value;
step two, the mark is N11The center position of the cross section of the active sampling tube on the ceiling is used as the origin to establish a plane coordinate system XOY, and the positive direction of the X axis is formed by the active sampling tube N11The circle center position of the cross section points to the active sampling tube N12The positive direction of Y axis is formed by an active sampling tube N11Cross-sectional circle ofHeart position pointing active sampling tube N21Then respectively determining the circle center position of each active sampling tube NijThe center plane coordinate of the cross section on the ceiling is (X)ij,Yij)；
Step three, the industrial control host controls to open a first active sampling pipe in each group of active sampling pipes connected with each distribution valve, and the air pump enables each active sampling pipe NijPumping the collected air into a smoke detector, and detecting by the smoke detector to obtain the real-time smoke concentration Q in the sampled airijSending the smoke concentration data into an industrial control host for processing, and judging Q by the industrial control hostijIf Q is greater than the predetermined value Q, if Q is not greater than the predetermined value QijIf the smoke concentration matrix is larger than the preset value Q, starting a smoke alarm system, and solving the local maximum value of the smoke concentration matrix, wherein the specific steps of solving the smoke concentration matrix are as follows:
first, element Q is judgedijIf it is greater than all the neighbouring elements in the smoke concentration matrix, if so, the element Q is markedijA local maximum value of the matrix is recorded, and subscript of the local maximum value is recorded; if not, judging the next element Qi+1，jWhether it is a local maximum of the matrix;
second, if the element Q is judgedijM, j ≠ n, then the next judged element is Q1，j+1Returning to the first step; element Q if judgedijCounting the number of local maximum values of the obtained matrix, wherein when the local maximum value of the smoke concentration matrix is one, the smoke generating source is one point; when the two local maximum values of the smoke concentration matrix are provided, the two smoke generating sources are provided, and the smoke generated by the smoke generating sources is not converged; when the local maximum value of the smoke concentration matrix is three, the smoke generating sources are two points and the smoke generated by the smoke generating sources is intersected;
third, let the element Q judgedijI ═ 1, j ═ 1, return to the first step;
step four, sampling air smoke concentration Q in the industrial control hostijCalculating the weight value serving as the coordinate to obtain the coordinate position (X, Y) of the smoke generating source, wherein the specific process comprises the following steps:
step one, sampling the air smoke concentration Q in the step threeijThe circle center coordinate points of the cross section of the active sampling tube on the ceiling, which are larger than the preset value Q, are connected through straight line segments, the length of each straight line segment is not more than D, and an envelope area is generated;
secondly, calculating the coordinates of the position of the smoke generating source when the smoke generating source is one point or two points;
the smoke generating source is a point, the smoke concentration matrix has only one local maximum value, and the coordinates of the position of the smoke generating source are calculated by the following formula:
Figure BDA0003458753110000031
Figure BDA0003458753110000032
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijCross section circle center plane coordinates on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(X, Y) is the coordinate of the position of one point of the smoke generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources does not intersect, the smoke concentration matrix has two local maximum values, and the coordinates of the positions of the two smoke generating sources are calculated by the following formula;
the first smoke generating source position coordinate calculation formula is:
p＝max{c，d}
Figure BDA0003458753110000033
Figure BDA0003458753110000034
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
q＝min{g，h}
Figure BDA0003458753110000035
Figure BDA0003458753110000041
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xac，Yac) The coordinate point with the maximum coordinate X when the maximum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xbd，Ybd) The coordinate point with the maximum coordinate X when the minimum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xeg，Yeg) The coordinate point with the minimum coordinate X when the maximum coordinate Y is satisfied in the envelope surface close to the right side in the planar coordinate system XOY;
(Xfh，Yfh) The coordinate point with the minimum coordinate X when the minimum coordinate Y is satisfied in the envelope surface close to the right side in the planar coordinate system XOY;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is intersected, three local maximum values exist in a smoke concentration matrix, and the coordinates of the position of the smoke generating source are calculated through the following steps:
firstly, dividing an envelope area by a straight line which passes through the center of a cross section of the active sampling tube on a ceiling and is parallel to the Y direction, and calculating coordinates of the source positions of two smoke generating sources;
the first smoke generating source position coordinate calculation formula is:
Figure BDA0003458753110000042
Figure BDA0003458753110000043
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure BDA0003458753110000051
Figure BDA0003458753110000052
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabCoordinates of the center of the cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
(Xab，Yab)，(Xcd，Ycd)，(Xef，Yef) The coordinates of the circle centers of the cross sections of the active sampling tubes on the ceiling, which correspond to the maximum values of the concentration of the three smog respectively, satisfy Qcd≥Qef>QabCalculating the coordinate (X) of the positions of the two smoke generating sources1，Y1)，(X2，Y2) Then, the (X) is obtained in turn1，Y1) To (X)cd，Ycd) Linear distance D of1a，(X1，Y1) To (X)ef，Yef) Linear distance D of1b，(X2，Y2) To (X)cd，Ycd) Linear distance D of2a，(X2，Y2) To (X)ef，Yef) Linear distance D of2b(ii) a If D is1a、D1bIs not more than D and D2a、D2bIs not greater than D, the determined coordinate (X) is considered1，Y1)，(X2，Y2) Namely coordinates of two smoke generating sources; otherwise, carrying out the next step;
secondly, the active sampling tube N corresponding to the minimum value of the three smoke concentration maximum values is passed throughabDividing an envelope area on a straight line which is parallel to the X direction and is at the center of a cross section on a ceiling, and calculating coordinates of the source positions of the two smoke generators;
the first smoke generating source position coordinate calculation formula is:
Figure BDA0003458753110000053
Figure BDA0003458753110000061
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure BDA0003458753110000062
Figure BDA0003458753110000063
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabA coordinate point of a center of a cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first point smoke generator;
(X2，Y2) The coordinates of the location of the second point where the mist occurred.
Calculated (X)1，Y1)，(X2，Y2) I.e. the coordinates of the two smoke generating source locations.
The invention adopts the multi-path distribution valve to reduce the complexity of the system, positions the smoke generating source through the rectangular array smoke collecting pipe and the weighting algorithm, connects the points of the smoke concentration reaching the threshold value in the collecting pipe, basically determines the smoke area, not only ensures certain sensitivity, but also reduces the number of used equipment.
Drawings
FIG. 1 is a flow chart of an early smoke generating source locating method of the present invention;
FIG. 2 is a schematic diagram of a coordinate system and an overall system according to the present invention;
FIG. 3(a) is a possible envelope for a point of the smoke generating source of the present invention;
FIG. 3(b) is a schematic diagram of a possible envelope of two smoke generating sources of the present invention when smoke is not merged;
figure 3(c) shows the possible envelope of two smoke generating sources of the invention when the smoke is converged.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in the attached drawings, the method for positioning the early smoke generating source of the rectangular offshore electric room comprises the following steps:
the method comprises the following steps that firstly, a plurality of active sampling pipes are mounted on a ceiling, each active sampling pipe penetrates through a hole in the ceiling to be fixed and extends out of the ceiling by 15-20 cm, the circle centers of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed in total, the distance between the central axes of two adjacent active sampling pipes is 2-3 m, and the distance between the outermost active sampling pipe and the adjacent side wall surface of the offshore electrical room is 0.8-1 m;
a plurality of active sampling pipes positioned on the same row of the rectangular array are used as a group of active sampling pipes, each group of active sampling pipes are connected with an air pump through a distribution valve, an industrial control host is connected with each distribution valve through a data line, and the jth sampling pipe connected with the ith distribution valve is marked as Nij. The air pump extracts air sampled by different active sampling pipes through the active sampling pipes and the distribution valve and then enters the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial personal computer through a data line, an m-row and N-column smoke concentration matrix is arranged in the industrial personal computer, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector extracts the smoke from the active sampling pipes NijWhen the detected smoke concentration is sent into the industrial control host through the data line, the smokeThe element in the ith row and the jth column in the fog concentration matrix is replaced by the fog concentration value. (ii) a
Step two, the mark is N11The center position of the cross section of the active sampling tube on the ceiling is used as the origin to establish a plane coordinate system XOY, and the positive direction of the X axis is formed by the active sampling tube N11The circle center position of the cross section points to the active sampling tube N12The positive direction of Y axis is formed by an active sampling tube N11The circle center position of the cross section points to the active sampling tube N21The center of the cross section of (1). Then determining each active sampling tube N respectivelyijThe center plane coordinate of the cross section on the ceiling is (X)ij,Yij)；
Step three, the industrial control host controls to open a first active sampling pipe in each group of active sampling pipes connected with each distribution valve, and the air pump enables each active sampling pipe NijPumping the collected air into a smoke detector, and detecting by the smoke detector to obtain the real-time smoke concentration Q in the sampled airijSending the smoke concentration data into an industrial control host for processing, and judging Q by the industrial control hostijIf Q is greater than the predetermined value Q, if Q is not greater than the predetermined value QijIf the smoke concentration is larger than the preset value Q, the smoke alarm system is started, and the local maximum value of the smoke concentration matrix is obtained. The specific steps of solving the smoke concentration matrix are as follows:
first, element Q is judgedijIf it is greater than all the neighbouring elements in the smoke concentration matrix, if so, the element Q is markedijA local maximum value of the matrix is recorded, and subscript of the local maximum value is recorded; if not, judging the next element Qi+1，jWhether it is a local maximum of the matrix;
second, if the element Q is judgedijM, j ≠ n, then the next judged element is Q1，j+1Returning to the first step; element Q if judgedijAnd (e) counting the number of local maximum values of the obtained matrix, wherein i is m, and j is n. When the local maximum value of the smoke concentration matrix is one, the smoke generating source is one point; when the two local maximum values of the smoke concentration matrix are provided, the two smoke generating sources are provided, and the smoke generated by the smoke generating sources is not converged; when the concentration of smoke is highWhen the local maximum values of the matrix are three, the smoke generating sources are two points and the smoke generated by the smoke generating sources is intersected;
third, let the element Q judgedijI ═ 1, j ═ 1, return to the first step;
step four, sampling air smoke concentration Q in the industrial control hostijCalculating the weight value serving as the coordinate to obtain the coordinate position (X, Y) of the smoke generating source, wherein the specific process comprises the following steps:
step one, sampling the air smoke concentration Q in the step threeijThe circle center coordinate points of the cross section of the active sampling tube on the ceiling, which are larger than the preset value Q, are connected through straight line segments, the length of each straight line segment is not more than D, and an envelope area is generated;
secondly, calculating the coordinates of the position of the smoke generating source when the smoke generating source is one point or two points;
the smoke generating source is a point, the smoke concentration matrix has only one local maximum value, and the coordinates of the position of the smoke generating source are calculated by the following formula:
Figure BDA0003458753110000081
Figure BDA0003458753110000082
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijThe cross section circle center plane coordinates on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(X, Y) is the coordinate of the position of one point of the smoke generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources does not intersect, the smoke concentration matrix has two local maximum values, and the coordinates of the positions of the two smoke generating sources are calculated by the following formula;
the first smoke generating source position coordinate calculation formula is:
p＝max{c，d}
Figure BDA0003458753110000091
Figure BDA0003458753110000092
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
q＝min{g，h}
Figure BDA0003458753110000093
Figure BDA0003458753110000094
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xac，Yac) The coordinate point with the maximum coordinate X when the maximum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xbd，Ybd) The coordinate point with the maximum coordinate X when the minimum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xeg，Yeg) The coordinate point with the minimum coordinate X when the maximum coordinate Y is satisfied in the envelope surface close to the right side in the planar coordinate system XOY;
(Xfh，Yfh) The coordinate point with the minimum coordinate X when the minimum coordinate Y is satisfied in the envelope surface close to the right side in the planar coordinate system XOY;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is intersected, three local maximum values exist in a smoke concentration matrix, and the coordinates of the position of the smoke generating source are calculated through the following steps:
firstly, dividing an envelope area by a straight line which passes through the center of a cross section of the active sampling tube on a ceiling and is parallel to the Y direction, and calculating coordinates of the source positions of two smoke generating sources;
the first smoke generating source position coordinate calculation formula is:
Figure BDA0003458753110000101
Figure BDA0003458753110000102
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure BDA0003458753110000103
Figure BDA0003458753110000104
in the formula:
Qijis each one in a rectangular arrayActive sampling tube NijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabCoordinates of the center of the cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
(Xab，Yab)，(Xcd，Ycd)，(Xef，Yef) The coordinates of the circle centers of the cross sections of the active sampling tubes on the ceiling, which correspond to the maximum values of the concentration of the three smog respectively, satisfy Qcd≥Qef>Qab. Calculating the coordinate (X) of the position of two smoke generating sources1，Y1)，(X2，Y2) Then, the (X) is obtained in turn1，Y1) To (X)cd，Ycd) Linear distance D of1a，(X1，Y1) To (X)ef，Yef) Linear distance D of1b，(X2，Y2) To (X)cd，Ycd) Linear distance D of2a，(X2，Y2) To (X)ef，Yef) Linear distance D of2b(ii) a If D is1a、D1bIs not more than D and D2a、D2bIs not greater than D, the determined coordinate (X) is considered1，Y1)，(X2，Y2) Namely coordinates of two smoke generating sources; otherwise, carrying out the next step;
secondly, the active sampling tube N corresponding to the minimum value of the three smoke concentration maximum values is passed throughabIn the skyDividing an envelope area by a straight line which is parallel to the X direction and has the circle center of the cross section on the pattern plate, and calculating coordinates of the source positions of the two smoke generators;
the first smoke generating source position coordinate calculation formula is:
Figure BDA0003458753110000111
Figure BDA0003458753110000112
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure BDA0003458753110000113
Figure BDA0003458753110000114
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabA coordinate point of a center of a cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first point smoke generator;
(X2，Y2) The coordinates of the location of the second point where the mist occurred.
Calculated (X)1，Y1)，(X2，Y2) I.e. the coordinates of the two smoke generating source locations.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (1)

1. A method for positioning an early smoke generating source in a rectangular offshore electric room is characterized by comprising the following steps:
the method comprises the following steps that firstly, a plurality of active sampling pipes are mounted on a ceiling, each active sampling pipe penetrates through a hole in the ceiling to be fixed and extends out of the ceiling by 15-20 cm, the circle centers of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed in total, the distance between the central axes of two adjacent active sampling pipes is 2-3 m, and the distance between the outermost active sampling pipe and the adjacent side wall surface of the offshore electrical room is 0.8-1 m;
a plurality of active sampling pipes positioned on the same row of the rectangular array are used as a group of active sampling pipes, each group of active sampling pipes are connected with an air pump through a distribution valve, an industrial control host is connected with each distribution valve through a data line, and the jth sampling pipe connected with the ith distribution valve is marked as NijThe air pump extracts air sampled by different active sampling pipes through the active sampling pipes and the distribution valves to enter the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial personal computer through a data line, a smoke concentration matrix with m rows and N columns is arranged in the industrial personal computer, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector extracts the smoke from the active sampling pipes NijWhen the detected smoke concentration is sent into the industrial control host through the data line, the ith row and jth column elements in the smoke concentration matrix are replaced by the smoke concentration value;
step two, the mark is N11Is activeThe central position of the cross section of the sampling tube on the ceiling is used as the origin to establish a plane coordinate system XOY, and the positive direction of the X axis is formed by an active sampling tube N11The circle center position of the cross section points to the active sampling tube N12The positive direction of Y axis is formed by an active sampling tube N11The circle center position of the cross section points to the active sampling tube N21Then respectively determining the circle center position of each active sampling tube NijThe center plane coordinate of the cross section on the ceiling is (X)ij，Yij)；
Step three, the industrial control host controls to open a first active sampling pipe in each group of active sampling pipes connected with each distribution valve, and the air pump enables each active sampling pipe NijPumping the collected air into a smoke detector, and detecting by the smoke detector to obtain the real-time smoke concentration Q in the sampled airijSending the smoke concentration data into an industrial control host for processing, and judging Q by the industrial control hostijIf Q is greater than the predetermined value Q, if Q is not greater than the predetermined value QijIf the smoke concentration matrix is larger than the preset value Q, starting a smoke alarm system, and solving the local maximum value of the smoke concentration matrix, wherein the specific steps of solving the smoke concentration matrix are as follows:
first, element Q is judgedijIf it is greater than all the neighbouring elements in the smoke concentration matrix, if so, the element Q is markedijA local maximum value of the matrix is recorded, and subscript of the local maximum value is recorded; if not, judging the next element Qi+1，jWhether it is a local maximum of the matrix;
second, if the element Q is judgedijM, j ≠ n, then the next judged element is Q1，j+1Returning to the first step; element Q if judgedijCounting the number of local maximum values of the obtained matrix, wherein when the local maximum value of the smoke concentration matrix is one, the smoke generating source is one point; when the two local maximum values of the smoke concentration matrix are provided, the two smoke generating sources are provided, and the smoke generated by the smoke generating sources is not converged; when the local maximum value of the smoke concentration matrix is three, the smoke generating sources are two points and the smoke generated by the smoke generating sources is intersected;
third, let it be judgedElement QijI ═ 1, j ═ 1, return to the first step;
step four, sampling air smoke concentration Q in the industrial control hostijCalculating the weight value serving as the coordinate to obtain the coordinate position (X, Y) of the smoke generating source, wherein the specific process comprises the following steps:
step one, sampling the air smoke concentration Q in the step threeijThe circle center coordinate points of the cross section of the active sampling tube on the ceiling, which are larger than the preset value Q, are connected through straight line segments, the length of each straight line segment is not more than D, and an envelope area is generated;
secondly, calculating the coordinates of the position of the smoke generating source when the smoke generating source is one point or two points;
the smoke generating source is a point, the smoke concentration matrix has only one local maximum value, and the coordinates of the position of the smoke generating source are calculated by the following formula:
Figure FDA0003458753100000021
Figure FDA0003458753100000022
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijCross section circle center plane coordinates on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(X, Y) is the coordinate of the position of one point of the smoke generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources does not intersect, the smoke concentration matrix has two local maximum values, and the coordinates of the positions of the two smoke generating sources are calculated by the following formula;
the first smoke generating source position coordinate calculation formula is:
p＝max{c，d}
Figure FDA0003458753100000031
Figure FDA0003458753100000032
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
q＝min{g，h}
Figure FDA0003458753100000033
Figure FDA0003458753100000034
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xac，Yac) The coordinate point with the maximum coordinate X when the maximum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xbd，Ybd) The coordinate point with the maximum coordinate X when the minimum coordinate Y is satisfied in the envelope surface on the left side in the planar coordinate system XOY;
(Xeg，Yeg) The coordinate when the maximum coordinate Y is satisfied in the envelope surface on the right side in the planar coordinate system XOYThe coordinate point with the smallest X;
(Xfh，Yfh) The coordinate point with the minimum coordinate X when the minimum coordinate Y is satisfied in the envelope surface close to the right side in the planar coordinate system XOY;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is intersected, three local maximum values exist in a smoke concentration matrix, and the coordinates of the position of the smoke generating source are calculated through the following steps:
firstly, dividing an envelope area by a straight line which passes through the center of a cross section of the active sampling tube on a ceiling and is parallel to the Y direction, and calculating coordinates of the source positions of two smoke generating sources;
the first smoke generating source position coordinate calculation formula is:
Figure FDA0003458753100000041
Figure FDA0003458753100000042
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure FDA0003458753100000043
Figure FDA0003458753100000044
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabCoordinates of the center of the cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first smoke generating source;
(X2，Y2) Coordinates of the location of the second smoke generating source;
(Xab，Yab)，(Xcd，Ycd)，(Xef，Yef) The coordinates of the circle centers of the cross sections of the active sampling tubes on the ceiling, which correspond to the maximum values of the concentration of the three smog respectively, satisfy Qcd≥Qef＞QabCalculating the coordinate (X) of the positions of the two smoke generating sources1，Y1)，(X2，Y2) Then, the (X) is obtained in turn1，Y1) To (X)cd，Ycd) Linear distance D of1a，(X1，Y1) To (X)ef，Yef) Linear distance D of1b，(X2，Y2) To (X)cd，Ycd) Linear distance D of2a，(X2，Y2) To (X)ef，Yef) Linear distance D of2b(ii) a If D is1a、D1bIs not more than D and D2a、D2bIs not greater than D, the determined coordinate (X) is considered1，Y1)，(X2，Y2) Namely coordinates of two smoke generating sources; otherwise, carrying out the next step;
secondly, the active sampling tube N corresponding to the minimum value of the three smoke concentration maximum values is passed throughabStraight line on the ceiling at the center of the cross section and parallel to the X direction divides the envelope areaCalculating coordinates of the source positions of the two smoke generating sources;
the first smoke generating source position coordinate calculation formula is:
Figure FDA0003458753100000051
Figure FDA0003458753100000052
the second calculation formula for the coordinates of the location of the source of the aerosol generating means is:
Figure FDA0003458753100000053
Figure FDA0003458753100000054
in the formula:
Qijfor each active sampling tube N in the rectangular arrayijSampling the obtained smoke concentration;
(Xij，Yij) For each active sampling tube N in the rectangular arrayijA plane coordinate of a center of a cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling pipes connected with a single distribution valve;
(Xab，Yab) The active sampling tube N corresponding to the minimum value of the three smoke concentration maximum valuesabA coordinate point of a center of a cross section on the ceiling;
(X1，Y1) Coordinates of the location of the first point smoke generator;
(X2，Y2) The coordinates of the position of the second point smoke generating source;
calculated (X)1，Y1)，(X2，Y2) I.e. the coordinates of the two smoke generating source locations.
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