CN114419831B - Rectangular marine electrical room early smoke generation source positioning method - Google Patents
Rectangular marine electrical room early smoke generation source positioning method Download PDFInfo
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- CN114419831B CN114419831B CN202210013479.7A CN202210013479A CN114419831B CN 114419831 B CN114419831 B CN 114419831B CN 202210013479 A CN202210013479 A CN 202210013479A CN 114419831 B CN114419831 B CN 114419831B
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- 239000000779 smoke Substances 0.000 title claims abstract description 231
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 138
- 239000011159 matrix material Substances 0.000 claims description 51
- 239000000443 aerosol Substances 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 18
- 239000000284 extract Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- 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 method for positioning an early smoke generation source between rectangular offshore electrical systems, which comprises the steps of arranging an array active sampling tube and positioning and weighting an early smoke generation source between the rectangular offshore electrical systems. The method is characterized in that the detection of indoor smoke concentration is realized by combining a rectangular array active sampling pipe network with a smoke detector, and the coordinates of the position of an early smoke generation source between the rectangular offshore electrical systems are calculated by matching with a weighting algorithm taking the sampled air smoke concentration as a weight of the coordinates. The method reduces the detection time of the smoke between the offshore electrical rooms, and simultaneously positions the generation source of the smoke through a weighting algorithm, thereby providing more scientific basis and quick response capability for fire extinguishment of the electrical rooms.
Description
Technical Field
The invention relates to a method for positioning an early smoke generation source, in particular to a method for positioning the origin of early smoke on an offshore platform.
Background
The fire early warning system of the offshore platform plays an important role in guaranteeing the life of personnel and the safety of facility equipment of the offshore platform, the traditional fire alarm system is limited by a manufacturing principle by using a photoelectric/ionic smoke detector, the smoke detector is arranged at the top of an electric floor slab, the distance is relatively high, meanwhile, smoke reaches the top by means of self diffusion, the smoke has larger concentration, the alarm threshold value of the smoke detector is reached, the alarm is only carried out, and the fire response time is long; because the current fire control standard does not have the function of origin positioning through smoke signals, only the part inside the electrical 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 provides a rectangular marine electrical room early smoke generation source positioning method capable of quickly determining a smoke area.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a rectangular marine electrical room early smoke generation source positioning method, comprising the following steps:
step one, installing a plurality of active sampling pipes on a ceiling, wherein each active sampling pipe is fixed by penetrating through a hole on the ceiling and extends out of the ceiling for 15-20 cm, the center positions of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed, 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 an offshore electrical room is 0.8-1 m;
taking a plurality of active sampling tubes positioned in the same row of the rectangular array as a group of active sampling tubes, wherein each group of active sampling tubes are connected with an air pump through a distribution valve, an industrial personal computer is connected with each distribution valve through a data line, and the j-th sampling tube connected with the i-th distribution valve is marked as N ij The air pump extracts air sampled by different active sampling pipes through the active sampling pipes and the distribution valve to enter the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial control host through the data line, the industrial control host is provided with a smoke concentration matrix of m rows and N columns, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector sends the smoke concentration matrix from the active sampling pipe N ij When the detected smoke concentration is sent into an industrial control host through a data line, the element of the ith row and the jth column in the smoke concentration matrix is replaced by the smoke concentration value;
step two, marked as N 11 Setting up a plane coordinate system XOY by taking the center position of the cross section of the active sampling tube on the ceiling as the origin, and setting up the positive direction of the X axis by the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 12 The positive direction of Y-axis is defined by the position of the center of the cross section of the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 21 Is then determined separately for each active sampling tube N ij The center plane coordinate of the cross section on the ceiling is (X ij ,Y ij )；
Step three, the industrial control host controls to open a first active sampling tube in each group of active sampling tubes connected with each distribution valve, and the air pump drives each active sampling tube N ij The collected air is pumped into a smoke detector, and the smoke detector detects the real-time smoke concentration Q in the sampled air ij And the smoke concentration data is sent into an industrial control host for processing, and the industrial control host judges Q ij Whether or not it is greater than a preset value Q, if Q ij If the smoke concentration matrix is larger than the preset value Q, starting a smoke alarm system, and solving a local maximum value of the smoke concentration matrix, wherein the specific steps of solving the smoke concentration matrix are as follows:
first step, judging element Q ij Whether or not it is greater than all adjacent elements in the smoke concentration matrix, if so, marking the element Q ij Is a local maximum of the matrix and records the subscript thereof; if not, judge the next element Q i+1，j Whether it is a local maximum of the matrix;
second, if the element Q is judged ij I=m, j+.n, then the next element to be judged is Q 1，j+1 Returning to the first step; if the element Q is judged ij I=m, j=n, counting the number of local maxima of the matrix obtained, and when the local maxima of the smoke concentration matrix are one, the smoke generation source is one point; when the local maximum value of the smoke concentration matrix is two, the smoke generating sources are two points, 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 meet;
third, let the judged element Q ij I=1, j=1, back to the first step;
step four, in the industrial control host, the sampling air smoke concentration Q is utilized ij The weight as coordinates is calculated to obtain the coordinate position (X, Y) of the smoke generation source, and the specific process is as follows:
first, sampling the air smoke concentration Q in the third step ij The center coordinate point of the cross section of the active sampling tube on the ceiling, which is larger than a preset value Q, is connected through straight line segments, and the length of each straight line segment is not larger than D, so that an envelope area is generated;
secondly, calculating coordinates of the position of the smoke generating source when the smoke generating source is one 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:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij The center plane coordinates of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X, Y) is the coordinates of the location of a point aerosol generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is not intersected, the smoke concentration matrix has two local maxima, and the coordinates of the positions of the two smoke generating sources are calculated through the following formula;
the first smoke generating source location has the following coordinate calculation formula:
p＝max{c，d}
the coordinate calculation formula of the second smoke generation source position is:
q＝min{g，h}
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ac ，Y ac ) The coordinate point is a coordinate point with the largest coordinate X when the coordinate Y is met in the envelope surface on the left side in the plane coordinate system XOY;
(X bd ，Y bd ) The coordinate point is the coordinate point with the largest coordinate X when the coordinate Y is minimum in the envelope surface near the left side in the plane coordinate system XOY;
(X eg ，Y eg ) The coordinate point is a coordinate point with the smallest coordinate X when the coordinate Y is the largest in the envelope surface near the right side in the plane coordinate system XOY;
(X fh ，Y fh ) The coordinate point with the smallest coordinate X when the coordinate Y is satisfied in the envelope surface on the right side in the plane coordinate system XOY;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources is intersected, three local maxima exist in a smoke concentration matrix, and the coordinates of the positions of the smoke generating sources are calculated through the following steps:
dividing an envelope region by a straight line which is parallel to the Y direction and passes through the center of the cross section of the active sampling tube on the ceiling and corresponds to the minimum value of the three smoke concentration maxima, and calculating the coordinates of the positions of two smoke generating sources in a trial mode;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab Coordinates of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
(X ab ，Y ab )，(X cd ，Y cd )，(X ef ，Y ef ) The coordinates of the center of the cross section of the active sampling tube on the ceiling, which correspond to the three smoke concentration maxima respectively, satisfy Q cd ≥Q ef >Q ab Calculate the coordinate points (X 1 ，Y 1 )，(X 2 ，Y 2 ) Then, sequentially obtaining (X) 1 ，Y 1 ) To (X) cd ，Y cd ) Straight distance D of (2) 1a ，(X 1 ，Y 1 ) To (X) ef ，Y ef ) Straight distance D of (2) 1b ，(X 2 ，Y 2 ) To (X) cd ，Y cd ) Straight distance D of (2) 2a ，(X 2 ，Y 2 ) To (X) ef ，Y ef ) Straight distance D of (2) 2b The method comprises the steps of carrying out a first treatment on the surface of the If D 1a 、D 1b One of which is not more than D and D 2a 、D 2b If one of them is not larger than D, then the obtained coordinates (X 1 ，Y 1 )，(X 2 ，Y 2 ) Namely two-point smoke generating source coordinates; otherwise, the next step is carried out;
a second step of passing through an active sampling tube N corresponding to the minimum value of three maximum values of smoke concentration ab Dividing an envelope region by a straight line which is parallel to the X direction and is at the center of the cross section on the ceiling, and calculating the coordinates of the positions of two smoke generating sources;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab A coordinate point of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of a first spot aerosol generating source location;
(X 2 ，Y 2 ) Is the coordinates of the location of the second point aerosol generating source.
Calculated (X) 1 ，Y 1 )，(X 2 ，Y 2 ) I.e. the coordinates of the positions of the two smoke generating sources.
The invention adopts the multi-way distributing 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 in the collecting pipe reaching the threshold value, basically determines the smoke area, ensures certain sensitivity and can reduce the number of used equipment.
Drawings
FIG. 1 is a flow chart of the early smoke generation source localization method of the present invention;
FIG. 2 is a schematic diagram of the coordinate system and overall system of the present invention;
FIG. 3 (a) shows a possible envelope of a smoke generating source according to the present invention;
FIG. 3 (b) shows a possible envelope of two smoke generating sources of the present invention when the smoke does not meet;
FIG. 3 (c) shows a possible envelope of two smoke generating sources of the present invention, when the smoke is converging.
Detailed Description
The invention will now be described in detail with reference to the drawings and to specific embodiments.
As shown in the attached drawings, the method for positioning the early smoke generation source of the rectangular offshore electrical room comprises the following steps:
step one, installing a plurality of active sampling pipes on a ceiling, wherein each active sampling pipe is fixed by penetrating through a hole on the ceiling and extends out of the ceiling for 15-20 cm, the center positions of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed, 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 an offshore electrical room is 0.8-1 m;
taking a plurality of active sampling tubes positioned in the same row of the rectangular array as a group of active sampling tubes, wherein each group of active sampling tubes are connected with an air pump through a distribution valve, an industrial personal computer is connected with each distribution valve through a data line, and the j-th sampling tube connected with the i-th distribution valve is marked as N ij . The air pump extracts air sampled by different active sampling pipes through the active sampling pipe and the distribution valve to enter the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial control host through the data line, the industrial control host is provided with a smoke concentration matrix of m rows and N columns, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector sends the smoke concentration matrix from the active sampling pipe N ij When the detected smoke concentration is sent into the industrial control host through the data line, the j-th column element of the i-th row in the smoke concentration matrix is replaced by the smoke concentration value. The method comprises the steps of carrying out a first treatment on the surface of the
Step two, marked as N 11 Setting up a plane coordinate system XOY by taking the center position of the cross section of the active sampling tube on the ceiling as the origin, and setting up the positive direction of the X axis by the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 12 The positive direction of Y-axis is defined by the position of the center of the cross section of the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 21 Is arranged at the center of the cross section of the cylinder. Then each active sampling tube N is determined separately ij The center plane coordinate of the cross section on the ceiling is (X ij ,Y ij )；
Step three, the industrial control host controls to open a first active sampling tube in each group of active sampling tubes connected with each distribution valve, and the air pump drives each active sampling tubeActive sampling tube N ij The collected air is pumped into a smoke detector, and the smoke detector detects the real-time smoke concentration Q in the sampled air ij And the smoke concentration data is sent into an industrial control host for processing, and the industrial control host judges Q ij Whether or not it is greater than a preset value Q, if Q ij And if the smoke concentration matrix is larger than the preset value Q, starting a smoke alarm system, and solving a local maximum value of the smoke concentration matrix. The specific steps for obtaining the smoke concentration matrix are as follows:
first step, judging element Q ij Whether or not it is greater than all adjacent elements in the smoke concentration matrix, if so, marking the element Q ij Is a local maximum of the matrix and records the subscript thereof; if not, judge the next element Q i+1，j Whether it is a local maximum of the matrix;
second, if the element Q is judged ij I=m, j+.n, then the next element to be judged is Q 1，j+1 Returning to the first step; if the element Q is judged ij I=m, j=n, and counting the number of local maxima of the matrix obtained. When the local maximum value of the smoke concentration matrix is one, the smoke generating source is one point; when the local maximum value of the smoke concentration matrix is two, the smoke generating sources are two points, 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 meet;
third, let the judged element Q ij I=1, j=1, back to the first step;
step four, in the industrial control host, the sampling air smoke concentration Q is utilized ij The weight as coordinates is calculated to obtain the coordinate position (X, Y) of the smoke generation source, and the specific process is as follows:
first, sampling the air smoke concentration Q in the third step ij The center coordinate point of the cross section of the active sampling tube on the ceiling, which is larger than a preset value Q, is connected through straight line segments, and the length of each straight line segment is not larger than D, so that an envelope area is generated;
secondly, calculating coordinates of the position of the smoke generating source when the smoke generating source is one 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:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Is arranged on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X, Y) is the coordinates of the location of a point aerosol generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is not intersected, the smoke concentration matrix has two local maxima, and the coordinates of the positions of the two smoke generating sources are calculated through the following formula;
the first smoke generating source location has the following coordinate calculation formula:
p＝max{c，d}
the coordinate calculation formula of the second smoke generation source position is:
q＝min{g，h}
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ac ，Y ac ) The coordinate point is a coordinate point with the largest coordinate X when the coordinate Y is met in the envelope surface on the left side in the plane coordinate system XOY;
(X bd ，Y bd ) The coordinate point is the coordinate point with the largest coordinate X when the coordinate Y is minimum in the envelope surface near the left side in the plane coordinate system XOY;
(X eg ，Y eg ) The coordinate point is a coordinate point with the smallest coordinate X when the coordinate Y is the largest in the envelope surface near the right side in the plane coordinate system XOY;
(X fh ，Y fh ) The coordinate point with the smallest coordinate X when the coordinate Y is satisfied in the envelope surface on the right side in the plane coordinate system XOY;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources is intersected, three local maxima exist in a smoke concentration matrix, and the coordinates of the positions of the smoke generating sources are calculated through the following steps:
dividing an envelope region by a straight line which is parallel to the Y direction and passes through the center of the cross section of the active sampling tube on the ceiling and corresponds to the minimum value of the three smoke concentration maxima, and calculating the coordinates of the positions of two smoke generating sources in a trial mode;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab Coordinates of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
(X ab ，Y ab )，(X cd ，Y cd )，(X ef ，Y ef ) The coordinates of the center of the cross section of the active sampling tube on the ceiling, which correspond to the three smoke concentration maxima respectively, satisfy Q cd ≥Q ef >Q ab . Calculate the coordinate points (X 1 ，Y 1 )，(X 2 ，Y 2 ) Then, sequentially obtaining (X) 1 ，Y 1 ) To (X) cd ，Y cd ) Straight distance D of (2) 1a ，(X 1 ，Y 1 ) To (X) ef ，Y ef ) Straight distance D of (2) 1b ，(X 2 ，Y 2 ) To (X) cd ，Y cd ) Straight distance D of (2) 2a ，(X 2 ，Y 2 ) To (X) ef ，Y ef ) Straight distance D of (2) 2b The method comprises the steps of carrying out a first treatment on the surface of the If D 1a 、D 1b One of which is not more than D and D 2a 、D 2b If one of them is not larger than D, then the obtained coordinates (X 1 ，Y 1 )，(X 2 ，Y 2 ) Namely two-point smoke generating source coordinates; otherwise, the next step is carried out;
a second step of passing through an active sampling tube N corresponding to the minimum value of three maximum values of smoke concentration ab Dividing an envelope region by a straight line which is parallel to the X direction and is at the center of the cross section on the ceiling, and calculating the coordinates of the positions of two smoke generating sources;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab A coordinate point of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of a first spot aerosol generating source location;
(X 2 ，Y 2 ) Is the coordinates of the location of the second point aerosol generating source.
Calculated (X) 1 ，Y 1 )，(X 2 ，Y 2 ) I.e. the coordinates of the positions of the two smoke generating sources.
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 examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (1)
1. A rectangular method for positioning early smoke generation sources in an offshore electrical room is characterized by comprising the following steps:
step one, installing a plurality of active sampling pipes on a ceiling, wherein each active sampling pipe is fixed by penetrating through a hole on the ceiling and extends out of the ceiling for 15-20 cm, the center positions of the plurality of active sampling pipes on the ceiling form a rectangular array, m rows and n columns are formed, 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 an offshore electrical room is 0.8-1 m;
taking a plurality of active sampling tubes positioned in the same row of the rectangular array as a group of active sampling tubes, wherein each group of active sampling tubes are connected with an air pump through a distribution valve, an industrial personal computer is connected with each distribution valve through a data line, and the j-th sampling tube connected with the i-th distribution valve is marked as N ij The air pump extracts air sampled by different active sampling pipes through the active sampling pipes and the distribution valve to enter the smoke detector, the smoke concentration detected by the smoke detector is sent into the industrial control host through the data line, the industrial control host is provided with a smoke concentration matrix of m rows and N columns, the initial value of each element in the smoke concentration matrix is zero, and when the smoke detector sends the smoke concentration matrix from the active sampling pipe N ij When the detected smoke concentration is sent into an industrial control host through a data line, the element of the ith row and the jth column in the smoke concentration matrix is replaced by the smoke concentration value;
step two, marked as N 11 Setting up a plane coordinate system XOY by taking the center position of the cross section of the active sampling tube on the ceiling as the origin, and setting up the positive direction of the X axis by the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 12 The positive direction of Y-axis is defined by the position of the center of the cross section of the active sampling tube N 11 Is directed to the active sampling tube N at the center position of the cross section 21 Is then determined separately for each active sampling tube N ij The center plane coordinate of the cross section on the ceiling is (X ij ，Y ij )；
Step three, the industrial control host controls to open a first active sampling tube in each group of active sampling tubes connected with each distribution valve, and the air pump drives each active sampling tube N ij The collected air is pumped into a smoke detector, and the smoke detector detects the real-time smoke concentration Q in the sampled air ij And will beThe smoke concentration data is sent into an industrial control host for processing, and the industrial control host judges Q ij Whether or not it is greater than a preset value Q, if Q ij If the smoke concentration matrix is larger than the preset value Q, starting a smoke alarm system, and solving a local maximum value of the smoke concentration matrix, wherein the specific steps of solving the smoke concentration matrix are as follows:
first step, judging element Q ij Whether or not it is greater than all adjacent elements in the smoke concentration matrix, if so, marking the element Q ij Is a local maximum of the matrix and records the subscript thereof; if not, judge the next element Q i+1，j Whether it is a local maximum of the matrix;
second, if the element Q is judged ij I=m, j+.n, then the next element to be judged is Q 1，j+1 Returning to the first step; if the element Q is judged ij I=m, j=n, counting the number of local maxima of the matrix obtained, and when the local maxima of the smoke concentration matrix are one, the smoke generation source is one point; when the local maximum value of the smoke concentration matrix is two, the smoke generating sources are two points, 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 meet;
third, let the judged element Q ij I=1, j=1, back to the first step;
step four, in the industrial control host, the sampling air smoke concentration Q is utilized ij The weight as coordinates is calculated to obtain the coordinate position (X, Y) of the smoke generation source, and the specific process is as follows:
first, sampling the air smoke concentration Q in the third step ij The center coordinate point of the cross section of the active sampling tube on the ceiling, which is larger than a preset value Q, is connected through straight line segments, and the length of each straight line segment is not larger than D, so that an envelope area is generated;
secondly, calculating coordinates of the position of the smoke generating source when the smoke generating source is one 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:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij The center plane coordinates of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X, Y) is the coordinates of the location of a point aerosol generating source;
the smoke generating sources are two points, smoke generated by the two smoke generating sources is not intersected, the smoke concentration matrix has two local maxima, and the coordinates of the positions of the two smoke generating sources are calculated through the following formula;
the first smoke generating source location has the following coordinate calculation formula:
p＝max{c，d}
the coordinate calculation formula of the second smoke generation source position is:
q＝min{g，h}
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ac ，Y ac ) The coordinate point is a coordinate point with the largest coordinate X when the coordinate Y is met in the envelope surface on the left side in the plane coordinate system XOY;
(X bd ，Y bd ) The coordinate point is the coordinate point with the largest coordinate X when the coordinate Y is minimum in the envelope surface near the left side in the plane coordinate system XOY;
(X eg ，Y eg ) The coordinate point is a coordinate point with the smallest coordinate X when the coordinate Y is the largest in the envelope surface near the right side in the plane coordinate system XOY;
(X fh ，Y fh ) The coordinate point with the smallest coordinate X when the coordinate Y is satisfied in the envelope surface on the right side in the plane coordinate system XOY;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
the smoke generating sources are two points, the smoke generated by the two smoke generating sources is intersected, three local maxima exist in a smoke concentration matrix, and the coordinates of the positions of the smoke generating sources are calculated through the following steps:
dividing an envelope region by a straight line which is parallel to the Y direction and passes through the center of the cross section of the active sampling tube on the ceiling and corresponds to the minimum value of the three smoke concentration maxima, and calculating the coordinates of the positions of two smoke generating sources in a trial mode;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab Coordinates of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of the first aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of a second aerosol generating source;
(X ab ，Y ab )，(X cd ，Y cd )，(X ef ，Y ef ) The coordinates of the center of the cross section of the active sampling tube on the ceiling, which correspond to the three smoke concentration maxima respectively, satisfy Q cd ≥Q ef ＞Q ab Calculate the coordinate points (X 1 ，Y 1 )，(X 2 ，Y 2 ) Then, sequentially obtaining (X) 1 ，Y 1 ) To (X) cd ，Y cd ) Straight distance D of (2) 1a ，(X 1 ，Y 1 ) To (X) ef ，Y ef ) Straight distance D of (2) 1b ，(X 2 ，Y 2 ) To (X) cd ，Y cd ) Straight distance D of (2) 2a ，(X 2 ，Y 2 ) To (X) ef ，Y ef ) Straight distance D of (2) 2b The method comprises the steps of carrying out a first treatment on the surface of the If D 1a 、D 1b One of which is not more than D and D 2a 、D 2b If one of them is not larger than D, then the obtained coordinates (X 1 ，Y 1 )，(X 2 ，Y 2 ) Namely two-point smoke generating source coordinates; otherwise, the next step is carried out;
a second step of passing through an active sampling tube N corresponding to the minimum value of three maximum values of smoke concentration ab Dividing an envelope region by a straight line which is parallel to the X direction and is at the center of the cross section on the ceiling, and calculating the coordinates of the positions of two smoke generating sources;
the first smoke generating source location has the following coordinate calculation formula:
the coordinate calculation formula of the second smoke generation source position is:
wherein:
Q ij for each active sampling tube N in a rectangular array ij Sampling the obtained smoke concentration;
(X ij ，Y ij ) For each active sampling tube N in a rectangular array ij Plane coordinates of the center of the cross section on the ceiling;
m is the total number of the distributing valves;
n is the number of active sampling tubes connected with a single distribution valve;
(X ab ，Y ab ) An active sampling tube N corresponding to the minimum value of three smoke concentration maximum values ab A coordinate point of a center of a cross section on the ceiling;
(X 1 ，Y 1 ) Coordinates of a first spot aerosol generating source location;
(X 2 ，Y 2 ) Coordinates of a location of the second point aerosol generating source;
calculated (X) 1 ，Y 1 )，(X 2 ，Y 2 ) I.e. the coordinates of the positions of the two smoke generating sources.
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