CN105959341A - Method for improving existing fire fighting system - Google Patents
Method for improving existing fire fighting system Download PDFInfo
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- CN105959341A CN105959341A CN201610227159.6A CN201610227159A CN105959341A CN 105959341 A CN105959341 A CN 105959341A CN 201610227159 A CN201610227159 A CN 201610227159A CN 105959341 A CN105959341 A CN 105959341A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides a method for improving an existing fire fighting system. According to the method, a wireless sensor network is utilized for monitoring potential fires; particularly, the wireless sensor network comprises a sensor network node and a monitoring central server. The sensor network node is configured at a monitored part and is connected with the monitoring central server through a local area network. The monitoring central server supplies a data service or transmits early warning information to a remote user through a network. The sensor network node comprises the components of a sensor network positioning module which performs positioning by means of an ellipse positioning method, a sensor restraining module which restrains the cost and energy of a sensor, a self-powering module which is powered by means of a dye-sensitized photocell, and a data correction module. The method has advantages of long service life, high monitoring efficiency and effective positioning speed increase of the sensor network node. Furthermore the cost and the energy of the sensor are restrained, thereby maximally saving monitoring cost.
Description
Technical field
The present invention relates to fire-fighting domain, be specifically related to a kind of improved method to existing fire-fighting system.
Background technology
Fire refers to the disaster that the most out of control burning is caused.In various disasters, fire be most frequently,
One of major casualty threatening common people's safety and social development the most at large, currently, automatic fire alarm system is mainly visited with temperature-sensitive
Surveying and smoke detection is main, cardinal principle is to be judged by the data message being gathered detector, if it exceeds set in advance
Fixed threshold value, then send abnormal alarm.Along with monitoring the time passage and sensing data volume growth, sensor management,
There is bigger difficulty in the tissue of sensing data, and the data collected for sensor network nodes must surveyed in conjunction with it
Positional information in amount coordinate system is the most meaningful.
Additionally, the working sensor energy consumption that used of monitoring is big and is easily subject to the impact of the environment such as temperature, sensor is caused to be surveyed
The data precision obtained reduces, and have impact on precision and the cost of fire monitoring further.
Summary of the invention
For the problems referred to above, the present invention provide a kind of can quickly alignment sensor network node, simultaneously to the expense of sensor and
Energy carries out retraining, monitoring the wireless senser disaster hidden-trouble monitoring network that degree of accuracy is high.
The purpose of the present invention realizes by the following technical solutions:
A kind of improved method to existing fire-fighting system, it uses wireless sensor network to carry out disaster hidden-trouble monitoring, specifically includes
Sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensor network nodes be arranged in by
Surveying position and be connected by LAN with monitoring center server, monitoring center's server provides number by network to long-distance user
According to servicing or sending early warning information, it is possible to send early warning note by short message alarm module, it is characterized in that, described sensor network
Node includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The invention have the benefit that
1, positioning sensor network nodes is the premise of accurate measurements, arranges and uses the sensor network of oval positioning mode fixed
Position module, simplifies location Calculation, accelerates the locating speed of sensor network nodes, set up rapidly the prison to disaster hidden-trouble
Survey system;
2, by setting sensor constraints module, for expense and the energy of sensor are retrained, it is possible to disaster hidden-trouble
Monitoring cost is saved to greatest extent on the premise of effectively monitoring;
3, after general sensor node uses a period of time, self-contained power depletion and lost efficacy, be arranged under illumination condition to
Sensor continues the coloring matter sensitization type light cell of energy supply, extends the service life of disaster hidden-trouble monitoring device;
4, it is provided for the data correction module that the data of sensor acquisition are corrected, improves the monitoring to disaster hidden-trouble quick
Sensitivity.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not constitute any limitation of the invention, for
Those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains the attached of other according to the following drawings
Figure.
Fig. 1 is the connection diagram of each intermodule of the present invention.
Detailed description of the invention
The invention will be further described with the following Examples.
Embodiment 1
Seeing Fig. 1, a kind of improved method to existing fire-fighting system of the present embodiment, it uses wireless sensor network to carry out fire
Hidden danger is monitored, and specifically includes sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensing
Device network node is arranged in tested position and is connected by LAN with monitoring center server, and monitoring center's server passes through net
Network provides data, services to long-distance user or sends early warning information, it is possible to send early warning note by short message alarm module, its feature
It is that described sensor network nodes includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The present embodiment accelerates the locating speed of sensor network nodes, is arranged under illumination condition the color continuing energy supply to sensor
Element sensitizing type light cell extends the service life of monitoring device;Sensor network route meet bandwidth, time delay, delay jitter,
Packet loss constraints, fb、fd、fdj、fplValue be all 1, monitoring cost relative reduction 10%;According to sensor
The correction factor m value of type selecting is 0.01, and monitoring accuracy improves 2% relatively.
Embodiment 2
Seeing Fig. 1, a kind of improved method to existing fire-fighting system of the present embodiment, it uses wireless sensor network to carry out fire
Hidden danger is monitored, and specifically includes sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensing
Device network node is arranged in tested position and is connected by LAN with monitoring center server, and monitoring center's server passes through net
Network provides data, services to long-distance user or sends early warning information, it is possible to send early warning note by short message alarm module, its feature
It is that described sensor network nodes includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈Np(N)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The present embodiment accelerates the locating speed of sensor network nodes, is arranged under illumination condition the color continuing energy supply to sensor
Element sensitizing type light cell extends the service life of monitoring device;Sensor network route be unsatisfactory for bandwidth, time delay, delay jitter,
Packet loss constraints, fb、fd、fdj、fplValue be all 0.2, monitoring cost relative reduction 15%;According to sensing
The correction factor m value of device type selecting is 0.02, and monitoring accuracy improves 3% relatively.
Embodiment 3
Seeing Fig. 1, a kind of improved method to existing fire-fighting system of the present embodiment, it uses wireless sensor network to carry out fire
Hidden danger is monitored, and specifically includes sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensing
Device network node is arranged in tested position and is connected by LAN with monitoring center server, and monitoring center's server passes through net
Network provides data, services to long-distance user or sends early warning information, it is possible to send early warning note by short message alarm module, its feature
It is that described sensor network nodes includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The present embodiment accelerates the locating speed of sensor network nodes, is arranged under illumination condition the color continuing energy supply to sensor
Element sensitizing type light cell extends the service life of monitoring device;Sensor network route be unsatisfactory for bandwidth, time delay, delay jitter,
Packet loss constraints, fb、fd、fdj、fplValue be all 0.4, monitoring cost relative reduction 8%;According to sensor
The correction factor m value of type selecting is 0.03, and monitoring accuracy improves 5% relatively.
Embodiment 4
Seeing Fig. 1, a kind of improved method to existing fire-fighting system of the present embodiment, it uses wireless sensor network to carry out fire
Hidden danger is monitored, and specifically includes sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensing
Device network node is arranged in tested position and is connected by LAN with monitoring center server, and monitoring center's server passes through net
Network provides data, services to long-distance user or sends early warning information, it is possible to send early warning note by short message alarm module, its feature
It is that described sensor network nodes includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The present embodiment accelerates the locating speed of sensor network nodes, is arranged under illumination condition the color continuing energy supply to sensor
Element sensitizing type light cell extends the service life of monitoring device;Sensor network route be unsatisfactory for bandwidth, time delay, delay jitter,
Packet loss constraints, fb、fd、fdj、fplValue be all 0.6, monitoring cost relative reduction 15%;According to sensing
The correction factor m value of device type selecting is 0.04, and monitoring accuracy improves 4% relatively.
Embodiment 5
Seeing Fig. 1, a kind of improved method to existing fire-fighting system of the present embodiment, it uses wireless sensor network to carry out fire
Hidden danger is monitored, and specifically includes sensor network nodes, LAN, monitoring center's server and short message alarm module, described sensing
Device network node is arranged in tested position and is connected by LAN with monitoring center server, and monitoring center's server passes through net
Network provides data, services to long-distance user or sends early warning information, it is possible to send early warning note by short message alarm module, its feature
It is that described sensor network nodes includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and arranges sensor network nodes during location
Coordinate be that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the first reference mode
Coordinate, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell;
Further, the described improved method to existing fire-fighting system also includes data correction module and connects with signal processing submodule
The power detecting module connect;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
Further, before gathering data, the clock using TPSN algorithm to realize wireless sensor network synchronizes, and is specially
Local clock at node to be synchronized adds clock jitter, and the clock completing node synchronizes.
The present embodiment accelerates the locating speed of sensor network nodes, is arranged under illumination condition the color continuing energy supply to sensor
Element sensitizing type light cell extends the service life of monitoring device;Sensor network route be unsatisfactory for bandwidth, time delay, delay jitter,
Packet loss constraints, fb、fd、fdj、fplValue be all 0.9, monitoring cost relative reduction 12%;According to sensing
The correction factor m value of device type selecting is 0.04, and monitoring accuracy improves 4% relatively.
Last it should be noted that, above example is only in order to illustrate technical scheme, rather than to scope
Restriction, although having made to explain to the present invention with reference to preferred embodiment, it will be understood by those within the art that,
Technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.
Claims (3)
1. the improved method to existing fire-fighting system, it uses wireless sensor network to carry out disaster hidden-trouble monitoring, specifically includes biography
Sensor network node, LAN, monitoring center's server and short message alarm module, described sensor network nodes is arranged in tested
Position is also connected by LAN with monitoring center server, and monitoring center's server provides data by network to long-distance user
Servicing or send early warning information, it is possible to sending early warning note by short message alarm module, it is characterized in that, described sensor network saves
Point includes:
(1) location in sensors network module, is used for obtaining sensor network nodes own location information, and it includes being sequentially connected with
Task-driven submodule, locator module and signal processing submodule, described task-driven submodule is by LAN and monitoring
Central server connects, and task-driven submodule drives locator module to obtain the own location information of ad-hoc network of sensors node,
After the own location information of the described signal processing submodule described ad-hoc network of sensors node of reading, own location information is delivered to institute
State monitoring center's server;Described locator module uses oval positioning mode to position, and sets sensor network nodes during location
Coordinate is that (x, y), the coordinate of reference mode is (xn,yn), n=A, B, C, D, with (xA,yA) as the seat of the first reference mode
Mark, with (xm,ym) as the coordinate of the second reference mode, positioning equation is:
Wherein, m=B, C, D, dAmFor sensor network nodes to the first reference mode, the distance of the second reference mode and, ask
Solve equation the position obtaining sensor;
(2) sensor constraints module, for retraining expense and the energy of sensor, is expressed as undirected by sensor network
Cum rights connects figure W=(N, L), and N represents that number of network node, L represent two-way link collection, and constraint function is:
Wherein, fb、fd、fdj、fplBe respectively bandwidth, time delay, delay jitter, packet loss penalty, A, B, C,
D is respectively fb、fd、fdj、fplWeight coefficient, [∑l∈Lc(l)+∑n∈NC (n)] it is expense restriction,
[∑l∈Lp(l)+∑n∈NP (n)] it is energy constraint;
When sensor network route meets bandwidth, time delay, delay jitter, packet loss constraints, fb、fd、fdj、fpl
Value be all 1, other situations fb、fd、fdj、fplValue all in the range of (0,1), expense restriction and energy are about
Bundle should take minima under conditions of meeting bandwidth, time delay, delay jitter and packet loss constraint;
(3) self-powered module, for sensor energy supply, it pigment including continuing energy supply under illumination condition to sensor
Sensitizing type light cell.
A kind of improved method to existing fire-fighting system the most according to claim 1, is characterized in that, also include data correction module
And the power detecting module being connected with signal processing submodule;
Described data correction module is for being corrected the data of sensor acquisition, and the data after correction are sent to monitoring center's service
Device, arranges correction factorWherein T0For local mean temperature, when T is sensor acquisition data
Real time temperature, m is the correction factor selected according to sensor type, arranges the value of m in the range of (0,0.05), then
T≥T0Time, updating formula is:
T < T0Time, updating formula is:
Wherein, Y is by the one of sensor acquisition group of data, YxFor data after correction;
Described signal processing submodule reads the power information of the sensor network nodes of power detecting module detection, and then will sensing
The power information of device network node sends to described monitoring center server.
A kind of improved method to existing fire-fighting system the most according to claim 1, is characterized in that, before gathering data, uses
TPSN algorithm realizes the clock of wireless sensor network and synchronizes, and is specially the local clock at node to be synchronized inclined plus clock
Difference, the clock completing node synchronizes.
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