CN110649573B - Control method and device for low-voltage switch cabinet group - Google Patents
Control method and device for low-voltage switch cabinet group Download PDFInfo
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- CN110649573B CN110649573B CN201910838398.9A CN201910838398A CN110649573B CN 110649573 B CN110649573 B CN 110649573B CN 201910838398 A CN201910838398 A CN 201910838398A CN 110649573 B CN110649573 B CN 110649573B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/14—Fire prevention, containment or extinguishing specially adapted for particular objects or places in connection with doors, windows, ventilators, partitions, or shutters, e.g. automatic closing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/173—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal drawer type
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Abstract
The application provides a control method and a control device for a low-voltage switch cabinet group, wherein the method is applied to the low-voltage switch cabinet group and comprises the following steps: the low-voltage switch cabinet group receives fire alarm information; the low-voltage switch cabinet group acquires a fire partition map containing the fire area, performs character recognition on the fire partition map to determine a plurality of fire doors adjacent to the fire area in the fire partition map, and extracts a plurality of directions of the fire doors; the low-voltage switch cabinet group requests a monitoring video of the fire area, and extracts a plurality of pictures corresponding to the plurality of directions in the monitoring video; the low-voltage switch cabinet analyzes the pictures to determine whether the fireproof door in the pictures is opened or not, if the fireproof door is opened, the corresponding space for opening the fireproof door is marked as a space to be controlled, the pull cabinet corresponding to the space to be controlled is determined according to the position of the space to be controlled, and the power supply in the pull cabinet is controlled to be closed. The technical scheme that this application provided has the high advantage of security.
Description
Technical Field
The application relates to the electrical field, in particular to a control method and device for a low-voltage switch cabinet group.
Background
The low-voltage switch cabinet is suitable for industries such as power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings and the like, and is used for power transmission, power distribution and electric energy conversion. Current low-voltage switchgear does not carry out relevant setting to the fire door that prevents of fire zone, leads to low-voltage switchgear to influence the fire prevention of building, and the security is low.
Disclosure of Invention
The invention aims to provide a control method and a control device for a low-voltage switch cabinet group.
The technical scheme adopted by the invention is as follows:
in a first aspect, a method for controlling a low-voltage switch cabinet group is provided, and the method includes the following steps:
the control method of the low-voltage switch cabinet group is characterized by being applied to the low-voltage switch cabinet group and comprising the following steps:
the low-voltage switch cabinet group receives fire alarm information, and the fire alarm information comprises: a fire area;
the low-voltage switch cabinet group acquires a fire partition map containing the fire area, performs character recognition on the fire partition map to determine a plurality of fire doors adjacent to the fire area in the fire partition map, and extracts a plurality of directions of the fire doors;
the low-voltage switch cabinet group requests a monitoring video of the fire area, the monitoring video is a monitoring video before fire alarm information, and a plurality of pictures corresponding to the plurality of directions in the monitoring video are extracted;
the low-voltage switch cabinet analyzes the pictures to determine whether the fireproof door in the pictures is opened or not, if the fireproof door is opened, the corresponding space for opening the fireproof door is marked as a space to be controlled, the pull cabinet corresponding to the space to be controlled is determined according to the position of the space to be controlled, and the power supply in the pull cabinet is controlled to be closed.
Optionally, the analyzing the plurality of pictures to determine whether the fire door in the plurality of pictures is opened specifically includes:
calculating each picture in the plurality of pictures to obtain a calculation result, if the calculation result is greater than a quantity threshold, determining that the fireproof door is opened, and if the calculation result is less than the quantity threshold, determining that the fireproof door is closed, wherein the calculating operation specifically comprises the following steps:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture in a plurality of pictures, obtaining a fireproof door second picture in a preset state according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
Optionally, the controlling the power supply in the pull cabinet to be turned off specifically includes:
the method comprises the following steps that a low-voltage switch cabinet periodically obtains a plurality of water pressure values of an automatic water spraying fire extinguishing system, the water pressure values form a water pressure vector according to the obtained time sequence, the water pressure vector is multiplied by a water pressure weight vector to obtain a product result, and a power supply in a pull cabinet is controlled to be closed after t seconds; wherein the content of the first and second substances,
the result of the multiplication(s) of t-k.
In a second aspect, there is provided a low-voltage switchgear device comprising:
a communication unit for receiving fire alarm information, the fire alarm information comprising: a fire area; acquiring a fire-protection zone map containing the fire-protection area;
the processing unit is used for performing character recognition on the fire-proof subarea graph to determine a plurality of fire doors adjacent to the firing area in the fire-proof subarea graph and extracting a plurality of directions of the fire doors;
the communication unit is also used for requesting a monitoring video of the fire area, wherein the monitoring video is a monitoring video before the fire alarm information;
the processing unit is further used for extracting a plurality of pictures corresponding to the plurality of directions in the monitoring video; and analyzing the pictures to determine whether the fireproof door in the pictures is opened, if the fireproof door is opened, marking the corresponding space for opening the fireproof door as a space to be controlled, determining a pull cabinet corresponding to the space to be controlled according to the position of the space to be controlled, and controlling the power supply in the pull cabinet to be closed.
Optionally, the processing unit is specifically configured to perform a calculation operation on each of the multiple pictures to obtain a calculation result, determine that the fire door is opened if the calculation result is greater than the number threshold, and determine that the fire door is closed if the calculation result is less than the number threshold, where the calculation operation specifically includes:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture in a plurality of pictures, obtaining a fireproof door second picture in a preset state according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
Optionally, the processing unit is specifically configured to periodically obtain a plurality of water pressure values of the automatic water-spraying fire-extinguishing system for the low-voltage switch cabinet, form a water pressure vector by the plurality of water pressure values according to the obtained time sequence, multiply the water pressure vector by a water pressure weight vector to obtain a product result, and control the power supply in the pull cabinet to be turned off after t seconds; wherein the content of the first and second substances,
the result of the multiplication(s) of t-k.
In a third aspect, a computer-readable storage medium storing a computer program for electronic data exchange is provided, wherein the computer program causes a computer to perform the method provided in the first aspect.
The method has the advantages that after the fire area is determined, the opening state of the fireproof door close to the fire area is determined, if the fireproof door belongs to the opening state, the power supply in the drawing cabinet of the corresponding space of the fireproof door is controlled to be turned off, so that the low-voltage apparatus of the corresponding space is turned off, the influence of the low-voltage apparatus on fire is avoided, and the safety is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1a is a schematic structural diagram of a low-voltage switch cabinet group according to the present invention.
Fig. 1b is a schematic structural diagram of a low-voltage switch cabinet according to the present invention.
Fig. 2 is a schematic structural view of a pull-out cabinet according to the present invention.
Fig. 3 is a schematic structural view of a fire protection device provided by the present invention.
Fig. 4 is a schematic view of a fire zone.
Fig. 5 is a schematic flow chart of a control method of the low-voltage switch cabinet group provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1a, fig. 1a is a schematic diagram of a low voltage switch cabinet group, as shown in fig. 1a, the low voltage switch cabinet group includes a plurality of low voltage switch cabinets, the specific structure of which is shown in fig. 1b, fig. 1b is a schematic diagram of the internal structure of a low voltage switch cabinet, as shown in fig. 1b, the low voltage switch cabinet includes: the frame that top frame 1, underframe 2 and four spinal branch daggers enclose, the roof 4 at closed frame top, the bottom plate 5 of closed frame bottom, the left backplate of closed frame left side, the right backplate on closed frame right side, articulate on the frame and can open and close preceding cabinet door 8 of frame front side and articulate on the frame and can open and close back cabinet door 9 of frame rear side, still be provided with respectively between preceding cabinet door 8 and the frame and between back cabinet door 9 and the frame and can be fixed the locking mechanism on the frame with corresponding sealed locking of cabinet door.
In the embodiment of the present application, since the locking mechanism for locking and fixing the front cabinet door 8 to the frame is the same as the locking mechanism for locking and fixing the rear cabinet door 9 to the frame, the structure of the locking mechanism is as follows: preceding cabinet door 8's one end is articulated mutually with the frame, preceding cabinet door 8's the other end is provided with a pivot that is the trend from beginning to end, the outer end of pivot is provided with the handle, the cover is equipped with the gear in the pivot, left and right sides at the gear is provided with a locking lever 14 respectively, the upper end that is located left locking lever 14 meshes the cooperation with the gear mutually, the lower extreme that is located the locking lever on right side meshes the cooperation with gear 1 mutually, interval is provided with a plurality of locating pins 15 from top to bottom on every locking lever, interval is provided with a plurality of hasps 16 from top to bottom on the frame corresponding with preceding cabinet door 8, every hasp 16 corresponds a locating pin 15, all be provided with the location locking groove that supplies to correspond.
The theory of operation of this locking mechanism's structure can be, when frame front side and forward turning handle are closed to current cabinet door 8, the handle can drive two locking levers 14 and remove in opposite directions simultaneously through pivot and gear cooperation, make the locating pin 15 card on two locking levers 14 go into in the location locking groove that corresponds hasp 16, thereby it is fixed with frame looks locking to be preceding cabinet door 8, make preceding cabinet door close, when the reverse turning handle, the handle can drive two locking levers 14 simultaneously through pivot and gear cooperation and move back to back mutually, make locating pin 15 on two locking levers 14 shift out the location locking groove on corresponding hasp 16, make preceding cabinet door 8 can open. Similarly, the rear cabinet door 9 provided with the same locking mechanism can also be opened or closed.
Referring to fig. 1b, the low voltage switchgear may be arranged in a multi-layer structure according to the meters arranged therein, and different partitions may be arranged for the low voltage switchgear according to actual conditions, so that stacking of different types of meters is avoided. In particular, it can be provided as a pull cabinet (as shown in fig. 2) for the different bays. As shown in fig. 2, the pull cabinet may include: side plate 20, heat sink 24 and other necessary devices, the side plate 20 may include: the outer side of the side plate 20 can be provided with a drawing slot 22 which can be drawn and matched with different subareas.
For the low-voltage switch cabinet of setting up the pull cabinet of pull cabinet, though its simple structure, its requirement to the maintainer when overhauing is higher, because for low-voltage switch cabinet, it has a plurality of pull cabinets, all disposes the instrument that many devices and device correspond in every pull cabinet, therefore if when breaking down, the maintainer if not familiar with the condition of the device in the pull cabinet, it is most likely that it can't confirm what kind of trouble or the position that the trouble appears. In practical application, the low-voltage switch cabinets are generally arranged in groups, and the low-voltage switch cabinets arranged in groups have more related devices and are possibly of different manufacturers, so that the difficulty of maintenance is further increased. In addition, for the electrical fault of the low-voltage switch cabinet, short circuit is a main cause of the fault, and the short circuit can cause instantaneous large current, and statistics shows that the electrical fire of the low-voltage switch cabinet is mostly caused by the short circuit, so extra attention is also needed for the fire prevention of the low-voltage switch cabinet.
According to the relevant requirements of fire protection regulations, for electrical appliance fires, gas fire extinguishing equipment can be adopted to extinguish the electrical appliance fire, but the existing gas fire extinguishing equipment extinguishes the fire in a large range, such as a large machine room with hundreds of square meters, and the reaction is slow, so that the requirements of a voltage switch cabinet cannot be met.
In order to make the low-voltage switchgear cabinet capable of automatic fire protection, there are two paths, the first one is to fire the low-voltage switchgear cabinet as a basic unit, which has the disadvantage that the area of fire protection is large and is far from the point of fire, for example, if a pull-out cabinet is on fire, it takes a certain time after the fire is detected, and the fire extinguishing gas (e.g. IG541, heptafluoropropane, carbon dioxide) of the low-voltage switchgear cabinet reaches the pull-out cabinet for a certain time, which may cause the other pull-out cabinets to fire. The second one is a pull cabinet as a basic unit, which has the advantages of fast fire detection and short fire extinguishing time, but has a very obvious defect that the threading hole 21 shown in fig. 2 cannot be completely closed due to circuit lines, and cannot meet the requirement of gas fire prevention for closing an opening by less than 3%. In order to solve the disadvantages of the two solutions, the fire protection device for the low-voltage switchgear cabinet provided by the present application uses the low-voltage switchgear cabinet as a basic unit, but the basic unit for detecting fire protection uses the pull-out cabinet as a basic unit, i.e. any one of the pull-out cabinets is on fire, so that it can activate the fire protection device of the whole low-voltage switchgear cabinet.
The low-voltage switchgear group as shown in fig. 1a may further comprise a fire protection device, and referring to fig. 3, fig. 3 provides a schematic view of a fire protection device, as shown in fig. 3, comprising a gas bottle 31, a fire extinguishing main 321, n fire extinguishing branches 322, n electromagnetic control valves 33 and n control circuits 34; wherein the content of the first and second substances,
the one end intercommunication fire extinguishing trunk of branch pipe 322 puts out a fire, and the other end inserts the low-voltage switchgear, the branch pipe of putting out a fire sets up an electromagnetic control valve 33, and every low-voltage switchgear has a control circuit 34, and this control circuit 34 includes:
the control circuit 34 may specifically include: a plurality of detection units and an OR gate circuit;
the output ends of the detection units are respectively connected with different input ends of an OR gate circuit, and the output end of the OR gate circuit is connected with the control end of the electromagnetic control valve 33;
each detection unit includes: the smoke detector 35, the temperature sensor 36 and the and circuit, wherein the smoke detector 35 and the temperature sensor 36 are respectively connected with an input end of the and circuit, and an output end of the and circuit is an output end of the detection unit.
In order to improve the performance of fire extinguishing, the gas bottle 31 is preferably arranged at the top of a low-voltage control cabinet, and the capacity of the gas bottle 31 is the gas capacity required by the low-voltage switch cabinet with the largest volume in the low-voltage switch cabinet group. The smoke detector 35 and the temperature sensor 36 can be diagonally arranged in the drawer cabinet, and the distance between the smoke detector 35 and the temperature sensor 36 is the largest.
The purpose of the preferred placement of the gas cylinder on top of the low-voltage control cabinet is to consider that for gas fire-extinguishing cylinders, carbon dioxide, CO, is generally used2Is more than the air density, the gas bottle is arranged at the top, and the gas outlet is downward, which is beneficial to CO2Discharging the waste water into a low-voltage control cabinet, and automatically flowing the waste water into the low-voltage control cabinet. Of course, the above gas fire-extinguishing bottle is preferably used with heptafluoropropane because the density of heptafluoropropane is 6 times that of air and the toxicity of heptafluoropropane is higher than that of CO2Much lower, improved safety, but CO2The cost of (a) is lower than that of heptafluoropropane. In practical application, only one smoke detector 35 and one temperature sensor 36 are generally arranged, but for avoiding false touch of the low-voltage switch cabinet, two devices are used, namely a double-linkage starting structure, so that false detection triggering is avoided, in addition, the smoke detector and the temperature sensor are arranged diagonally and are prevented from being positioned at the same position with the distance larger than the maximum distance to generate the same interference to generate false triggering, and the safety is improved.
Optionally, the detecting unit may further comprise a heat sink 24, and a diverter of the heat sink 24 is connected to an output of the or gate, the diverter being configured to control a fan of the heat sink 24 to reverse when receiving the high level.
The steering control of the detection unit to the fan of the radiator is to improve the fire extinguishing effect of the drawing cabinet, and for the drawing cabinet, when the drawing cabinet is in normal operation, the fan of the radiator exhausts air outwards, namely the pressure in the drawing cabinet is generally in a negative pressure state, and when the drawing cabinet is in a fire state, the fire extinguishing gas needs to be rapidly pumped into the drawing cabinet so as to rapidly improve the concentration of the fire extinguishing gas. In addition, before the fan for controlling the radiator reversely rotates, the fan can be stopped for a set time and then the sub-fans can be controlled to reversely rotate. This technical effect has 2, if this fan does not stall, still can take out the flue gas in the pull cabinet, the flue gas is hot cigarette this moment, after the hot cigarette arrives the low-voltage switchgear, because the temperature of hot cigarette is higher, probably with other pull cabinets ignition, consequently need stall here, and delay a settlement time because the fire extinguishing gas just begins to release this moment, the concentration of the fire extinguishing gas in the low-voltage switchgear is not high, in other words, the oxygen concentration of low-voltage switchgear is still higher this moment, directly draw the fresh air that oxygen concentration is higher into the pull cabinet and can form certain combustion-supporting effect to the pull cabinet, consequently, a settlement time of stalling (generally 15s to 30s) is in the reversal, can play fine effect of putting out a fire.
Optionally, in order to improve the fire extinguishing effect, a sealing strip may be disposed around the outer frame of the low-voltage switch cabinet, and the material of the sealing strip may be a class a or B1 material.
Referring to fig. 4, fig. 4 is a schematic diagram of fire zones, as shown in fig. 4, the present application ignores the requirement of fire setting between buildings and only analyzes the fire zone in the buildings, because the electrical equipment controlled by the low-voltage switch cabinet generally does not cross the buildings, and therefore only analyzes the fire zone in the buildings, as shown in fig. 4, for example, for a certain carpentry factory, for peripheral equipment rooms, such as an air conditioner room, a fire-fighting water pump room, a power distribution room, and an alarm valve room, which belong to equipment rooms, office zones, such as offices, which belong to office rooms, wherein the office rooms and the factory are separated by a 2-hour fire partition and a 1-hour floor, and are provided with a second-class fire door, and for FM represents a fire door, the nozzles in the diagram represent automatic sprinkler fire extinguishing systems, and the corresponding specifications can be described in "building fire regulations", and will not be described in detail herein. For the core of fire protection, there is a concept that, first, a corresponding area is placed without fire, and, second, if fire occurs, the fire is controlled within a set range for a certain time. This is the principle of fire zoning and ensures that the above-mentioned required configurations, i.e. firewall, fire wall, fire door etc. settings, for which there is no corresponding change of state, are very reliable, but for which it is possible to open and to close, and if it is closed, there is no impact on the fire zones, but if it is open, the fire door is rather connected, so that the impact on 2 zones is relatively large. Taking fig. 4 as an example, if a manufacturer catches fire, when FM b in an office is opened, the fire barrier is completely ineffective, fire may be spread into an office area along the opened FM b, and in addition, for a low-voltage switchgear, it controls many low-voltage devices, such as lighting in the office, etc., short circuit of electrical devices may be caused during a fire, which may cause the low-voltage switchgear to catch fire, and this is important for the state of the fire door, so it is necessary to determine in advance the situation of the fire door in an area adjacent to the area to catch fire, which can control the low-voltage switchgear in the area in advance, thereby improving safety.
Referring to fig. 5, fig. 5 provides a method for controlling a low-voltage switch cabinet group, which is performed by the low-voltage switch cabinet group shown in fig. 1a, and the method is shown in fig. 5, and includes the following steps:
step S501, the low-voltage switch cabinet group receives fire alarm information, and the fire alarm information comprises: a fire area;
the fire alarm information in step S501 may be sent by the automatic sprinkler system, and the fire area may be determined by the automatic sprinkler system in various ways, and the specific determination manner may refer to the specification of the automatic sprinkler system, which is not described herein again.
Step S502, the low-voltage switch cabinet group comprises a fire partition map of the fire area, character recognition is carried out on the fire partition map to determine a plurality of fire doors adjacent to the fire area in the fire partition map, and a plurality of directions of the fire doors are extracted;
the specific implementation method for performing character recognition on the fire partition map to determine the fire doors adjacent to the fire area in the fire partition map may include: and (3) a plurality of fire doors and the orientation of the fire doors adjacent to the fire area in the fire zone map are determined through a neural network. Taking fig. 4 as an example, after inputting fig. 4 into the neural network to perform character recognition and determine the FMs, the locations of the plurality of FMs are determined according to the locations of the FMs in the fire zone map. Taking fig. 4 as an example, assuming a wooden house is on fire, the identification can determine that the adjacent fire door is: 3 prevent fire door in northwest corner, 1 prevent fire door in west, 1 prevent fire door in southwest corner, 1 prevent fire door in southeast corner.
The method for performing the character recognition on the neural network in the embodiment of the present application is not limited, and certainly, in practical applications, other character recognition methods may also be adopted, for example, a hundred-degree character recognition algorithm and other recognition algorithms.
Step S503, the low-voltage switch cabinet group requests a monitoring video of the fire area, the monitoring video is a monitoring video before fire alarm information, and a plurality of pictures corresponding to the plurality of directions in the monitoring video are extracted;
the extracting the plurality of pictures corresponding to the plurality of directions in the monitoring video may specifically include:
determining a plurality of positions of the fireproof door, acquiring a plurality of cameras corresponding to the positions, and extracting a plurality of pictures collected by the cameras.
For example, in an optional embodiment, a shooting direction list of each camera in a building is established, a plurality of cameras matched with the direction are obtained by querying the list, and pictures shot by the plurality of cameras are extracted. Of course, if the camera takes a video, a part of pictures can be cut from the video.
Step S504, the low-voltage switch cabinet analyzes the pictures to determine whether the fireproof door in the pictures is opened, if the fireproof door is opened, a corresponding space for opening the fireproof door is marked as a space to be controlled, a pull cabinet corresponding to the space to be controlled is determined according to the position of the space to be controlled, and the power supply in the pull cabinet is controlled to be closed.
The application provides a technical scheme confirms after the district that catches fire, confirms with this district that catches fire the opening state of close fire door of pasting, if belong to this fire door and belong to opening state, the power in the pull cabinet of the corresponding space of this fire door of control is closed to close the low-voltage apparatus that should correspond the space, avoided the influence of low-voltage apparatus to the conflagration, improved the security.
The analyzing the plurality of pictures to determine whether the fire door in the plurality of pictures is opened may be determined by analyzing the pictures, and the specific analysis method may include:
performing calculation operation on each of the plurality of pictures, and determining whether the fireproof door is opened according to the calculation result, wherein the calculation operation specifically includes:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture, obtaining a fireproof door second picture in a preset state (namely a closed state) according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
The determining whether the fire door is opened according to the calculation result may include: and if the calculation result, namely the number n, is greater than the number threshold, determining that the fireproof door is opened, and if the calculation result, namely the number n, is less than the number threshold, determining that the fireproof door is closed.
The principle of determining whether the fireproof door is opened or closed specifically may be: the method comprises the steps of determining a second picture of the fireproof door in a preset state (namely in a closed state) as an original picture, comparing the acquired first picture with the second picture, directly adopting a scheme of subtracting a gray value matrix in a comparison mode, wherein the calculation amount can be reduced, if the first picture and the second picture are basically similar, the number of element values larger than a set threshold value in a corresponding difference matrix is small, and otherwise, if the number of the element values larger than the set threshold value in the difference matrix is large, it can be determined that the fire door is in an open state.
The method for determining the drawer cabinet corresponding to the space to be controlled according to the position of the space to be controlled may include:
and establishing a list between each pull cabinet and the space to be controlled, and determining the identification of the pull cabinet from the list after determining the space to be controlled. For example, the pull-out cabinets corresponding to the office area are pull-out cabinet 1-1 and pull-out cabinet 2-1, where pull-out cabinet 1-1 represents the 1 st pull-out cabinet of the 1 st low-voltage switch control cabinet.
The power supply in the pull cabinet can be turned off by adopting the existing power supply control method, each pull cabinet can be provided with an independent power supply or power supply control circuit, the power supply and the power supply control circuit can adopt the existing technical scheme, and the technical scheme of the application does not relate to the specific power supply and the power supply control circuit.
The above-mentioned power shutdown in controlling this pull cabinet can also include:
the method comprises the following steps that a low-voltage switch cabinet periodically obtains a plurality of water pressure values of an automatic water spraying fire extinguishing system, the water pressure values form a water pressure vector according to the obtained time sequence, the water pressure vector is multiplied by a water pressure weight vector to obtain a product result, and a power supply in a pull cabinet is controlled to be closed after t seconds; wherein the content of the first and second substances,
and t is k multiplied by the result(s).
In the following, a practical example is described, and assuming that the plurality of water pressure values are 0.5Mpa, 0.4Mpa, 0.35Mpa, 0.3Mpa and 0.2Mpa, respectively, the water pressure vector can be:
A＝【0.5、0.4、0.35、0.3、0.2】；
assuming a hydraulic weight vector, the calculated t is 0.5 × 9.95 ═ 5s, i.e., closing is delayed by 5 seconds.
The principle of controlling the power supply turn-off delay in the pull-out cabinet is explained below, because the pull-out cabinet controls the low-voltage electrical equipment (e.g. general lighting) in the corresponding area (i.e. the area adjacent to the fire area), where the lighting does not relate to emergency lighting, and in the spread of fire, if the fire is larger, the speed of the fire affecting the adjacent area may be faster, so in order to avoid the influence of the low-voltage electrical equipment on the fire, the lower-voltage electrical equipment needs to be turned off as soon as possible, but the faster the low-voltage electrical equipment is turned off, the influence on evacuation is larger, and although there is emergency lighting, the emergency lighting first easily causes panic of people, and the effect of the emergency lighting is much worse than that of the general lighting, so that the delay as much as possible is necessary for the operation of the low-voltage electrical equipment under the condition of ensuring safety. The key point here is the influence on the degree of fire, according to the principle of the automatic fire-extinguishing sprinkler system (the principle can be specifically referred to in GB50016-2014), the principle of the automatic fire-extinguishing sprinkler system is that a nozzle is provided, which is currently the most commonly used closed system, and for the closed system, the nozzle is provided with a temperature-sensing device, which generally explodes at a temperature above 68 ℃, so that water in the pipeline of the automatic fire-extinguishing sprinkler system is sprayed out of the nozzle, and the nozzle cannot be recovered after explosion, if the fire is strong, the nozzle explodes quickly, so that more nozzle flowing water causes the water pressure to decrease quickly, and the fire starts to be small, so that the value of the subsequent water pressure weight vector is adjusted greatly, because the later water pressure value has a large influence on the size of the fire, through the principle, the power supply of the pull cabinet of the low-voltage switch cabinet can be quickly turned off when the fire is large so as to turn off the low-voltage electricity, and the low-voltage electricity can be slowly turned off when the fire is small.
Taking the above example as an example, if the fire is very violent, the value a, especially the value of the latter pressure, will be small, for example, a ═ 0.5, 0.25, 0.15, and thus t ═ 2.625 s.
The present application further provides a low-voltage switch cabinet group (the specific structure can be referred to the descriptions of fig. 1a, fig. 1b, fig. 2, and fig. 3), which includes: a low-voltage switchgear device which can be arranged in a low-voltage switchgear assembly. The method comprises the following steps:
a communication unit for receiving fire alarm information, the fire alarm information comprising: a fire area; acquiring a fire-protection zone map containing the fire-protection area;
the processing unit is used for performing character recognition on the fire-proof subarea graph to determine a plurality of fire doors adjacent to the firing area in the fire-proof subarea graph and extracting a plurality of directions of the fire doors;
the communication unit is also used for requesting a monitoring video of the fire area, wherein the monitoring video is a monitoring video before the fire alarm information;
the processing unit is further used for extracting a plurality of pictures corresponding to the plurality of directions in the monitoring video; and analyzing the pictures to determine whether the fireproof door in the pictures is opened, if the fireproof door is opened, marking the corresponding space for opening the fireproof door as a space to be controlled, determining a pull cabinet corresponding to the space to be controlled according to the position of the space to be controlled, and controlling the power supply in the pull cabinet to be closed.
Optionally, the processing unit is specifically configured to perform a calculation operation on each of the multiple pictures to obtain a calculation result, determine that the fire door is opened if the calculation result is greater than the number threshold, and determine that the fire door is closed if the calculation result is less than the number threshold, where the calculation operation specifically includes:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture in a plurality of pictures, obtaining a fireproof door second picture in a preset state according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
Optionally, the processing unit is specifically configured to periodically obtain a plurality of water pressure values of the automatic water-spraying fire-extinguishing system for the low-voltage switch cabinet, form a water pressure vector by the plurality of water pressure values according to the obtained time sequence, multiply the water pressure vector by a water pressure weight vector to obtain a product result, and control the power supply in the pull cabinet to be turned off after t seconds; wherein the content of the first and second substances,
the result of the multiplication(s) of t-k.
The present application also provides a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method as shown in fig. 5.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (5)
1. A control method of a low-voltage switch cabinet group is characterized in that the method is applied to the low-voltage switch cabinet group, and comprises the following steps:
the low-voltage switch cabinet group receives fire alarm information, and the fire alarm information comprises: a fire area;
the low-voltage switch cabinet group acquires a fire partition map containing the fire area, performs character recognition on the fire partition map to determine a plurality of fire doors adjacent to the fire area in the fire partition map, and extracts a plurality of directions of the fire doors;
the low-voltage switch cabinet group requests a monitoring video of the fire area, the monitoring video is a monitoring video before fire alarm information, and a plurality of pictures corresponding to the plurality of directions in the monitoring video are extracted;
the low-voltage switch cabinet analyzes the pictures to determine whether a fireproof door in the pictures is opened or not, if the fireproof door is opened, a corresponding space for opening the fireproof door is marked as a space to be controlled, a pull cabinet corresponding to the space to be controlled is determined according to the position of the space to be controlled, and a power supply in the pull cabinet is controlled to be closed; the analyzing the plurality of pictures to determine whether the fire door in the plurality of pictures is opened specifically comprises:
calculating each picture in the plurality of pictures to obtain a calculation result, if the calculation result is greater than a quantity threshold, determining that the fireproof door is opened, and if the calculation result is less than the quantity threshold, determining that the fireproof door is closed, wherein the calculating operation specifically comprises the following steps:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture in a plurality of pictures, obtaining a fireproof door second picture in a preset state according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
2. The method of claim 1, wherein controlling the power down in the pull cabinet comprises:
the method comprises the following steps that a low-voltage switch cabinet periodically obtains a plurality of water pressure values of an automatic water spraying fire extinguishing system, the water pressure values form a water pressure vector according to the obtained time sequence, the water pressure vector is multiplied by a water pressure weight vector to obtain a product result, and a power supply in a pull cabinet is controlled to be closed after t seconds; wherein the content of the first and second substances,
and t is k multiplied to obtain the result.
3. A low-voltage switchgear device, characterized in that it comprises:
a communication unit for receiving fire alarm information, the fire alarm information comprising: a fire area; acquiring a fire-protection zone map containing the fire-protection area;
the processing unit is used for performing character recognition on the fire-proof subarea graph to determine a plurality of fire doors adjacent to the firing area in the fire-proof subarea graph and extracting a plurality of directions of the fire doors;
the communication unit is also used for requesting a monitoring video of the fire area, wherein the monitoring video is a monitoring video before the fire alarm information;
the processing unit is further used for extracting a plurality of pictures corresponding to the plurality of directions in the monitoring video; analyzing the pictures to determine whether a fireproof door in the pictures is opened, if the fireproof door is opened, marking a corresponding space for opening the fireproof door as a space to be controlled, determining a pull cabinet corresponding to the space to be controlled according to the position of the space to be controlled, and controlling a power supply in the pull cabinet to be closed;
the processing unit is specifically configured to perform a calculation operation on each of the plurality of pictures to obtain a calculation result, determine that the fire door is opened if the calculation result is greater than the quantity threshold, and determine that the fire door is closed if the calculation result is less than the quantity threshold, where the calculation operation specifically includes:
the method comprises the steps of obtaining a first picture and a fireproof door number corresponding to the first picture in a plurality of pictures, obtaining a fireproof door second picture in a preset state according to the fireproof door number, carrying out gray processing on the first picture and the second picture to obtain a first gray picture and a second gray picture, processing the first gray picture to obtain a first gray value matrix, processing the second gray picture to obtain a second gray value matrix, calculating a difference value of the first gray value matrix and the second gray value matrix to obtain a difference value matrix, and counting the number n of element values of the difference value matrix, wherein the number n is a calculation result, and the number n is larger than a set threshold value.
4. Low-voltage switchgear device as claimed in claim 3,
the processing unit is specifically used for periodically acquiring a plurality of water pressure values of the automatic water spraying fire extinguishing system by the low-voltage switch cabinet, forming a water pressure vector by the plurality of water pressure values according to the acquired time sequence, multiplying the water pressure vector by a water pressure weight vector to obtain a product result, and controlling the power supply in the pull cabinet to be closed after t seconds; wherein the content of the first and second substances,
and t is k multiplied to obtain the result.
5. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-2.
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| CN103578217A (en) * | 2013-10-31 | 2014-02-12 | 江苏亿能电气有限公司 | Monitoring device for switch cabinet |
| CN104463253A (en) * | 2015-01-06 | 2015-03-25 | 电子科技大学 | Fire fighting access safety detection method based on self-adaptation background study |
| CN205759334U (en) * | 2016-06-29 | 2016-12-07 | 浙江汉腾物联科技有限公司 | A kind of intelligent fire-pretection system |
| CN108765843A (en) * | 2018-06-01 | 2018-11-06 | 浙江鑫飞智能工程有限公司 | Fire alarm system for intelligent building |
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| CN103578217A (en) * | 2013-10-31 | 2014-02-12 | 江苏亿能电气有限公司 | Monitoring device for switch cabinet |
| CN104463253A (en) * | 2015-01-06 | 2015-03-25 | 电子科技大学 | Fire fighting access safety detection method based on self-adaptation background study |
| CN205759334U (en) * | 2016-06-29 | 2016-12-07 | 浙江汉腾物联科技有限公司 | A kind of intelligent fire-pretection system |
| CN108765843A (en) * | 2018-06-01 | 2018-11-06 | 浙江鑫飞智能工程有限公司 | Fire alarm system for intelligent building |
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