CN112950886A - Public transport battery compartment fire prevention and fire early warning system - Google Patents
Public transport battery compartment fire prevention and fire early warning system Download PDFInfo
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- CN112950886A CN112950886A CN202110082268.4A CN202110082268A CN112950886A CN 112950886 A CN112950886 A CN 112950886A CN 202110082268 A CN202110082268 A CN 202110082268A CN 112950886 A CN112950886 A CN 112950886A
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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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- 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
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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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
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/04—Arrangement of batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Human Computer Interaction (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a public transport battery compartment fire prevention and fire early warning system which comprises a control box, wherein a cylindrical shell-shaped protective cover is arranged inside the control box, a one-key starting switch is arranged inside the protective cover, a disposable pressing plate is arranged at a port of the protective cover, a microprocessor is arranged inside the control box, the microprocessor is connected with a compressed air foam fire extinguishing device, a fault display module, an information storage module, a fire alarm module, the one-key starting switch and an A/D conversion module, the A/D conversion module is connected with a signal conditioning circuit module, and the signal conditioning circuit module is connected with a fire monitoring module. The invention has convenient and safe operation and good safety early warning and protection effects on the battery compartment of the public transport means.
Description
Technical Field
The invention relates to the technical field of fire safety, in particular to a public transport battery compartment fire prevention and fire early warning system.
Background
The battery compartment of public transport means is used for depositing the battery, considers that battery compartments such as waterproof theftproof relatively more closed, and the thermal diffusivity is not good like this, simultaneously, the battery in the battery compartment receives vibrations and collision easily and the battery generates heat easily at long-time work, and inside temperature risees easily, has certain potential safety hazard, therefore we need establish fire prevention and fire early warning system in the battery compartment and guarantee the safety of using.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a public transport battery compartment fire prevention and fire early warning system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a public transport battery compartment fire prevention and conflagration early warning system, includes the control box, the internally mounted of control box has the protection casing of cylinder shell form, the internally mounted of protection casing has a key starting switch, the port of protection casing is installed and is pressed the board once only, the internally mounted of control box has microprocessor, microprocessor is connected with compressed air foam extinguishing device, trouble display module, information storage module, fire alarm module, a key starting switch, AD conversion module is connected with signal conditioning circuit module, signal conditioning circuit module is connected with fire monitoring module.
Preferably, the internally mounted of control box has the battery, the battery is used for supplying power for microprocessor, the control box side articulates there is the apron, the battery is connected with charge-discharge fault detection module.
Preferably, the microprocessor is connected with a control center through a wireless communication module, and the control center is connected with a 119 fire rescue center.
Preferably, the fire alarm module comprises a coded sound-light alarm, a bus isolator, a multi-line module and a fire position positioning module, the coded sound-light alarm can perform sound-light alarm and indicate escape simultaneously in a cab, an automobile and an automobile, the bus isolator is connected to a front end protection loop of a system bus and isolates a part connected with the rear end from the system when faults such as short circuit occur, the multi-line module is used for connecting a multi-line direct control point and controlled equipment, and the fire position positioning module is used for determining the fire occurrence position.
Preferably, the compressed air foam fire extinguishing device comprises a water tank, a foam pump, a foam storage tank, an air mixer, a compressed air tank, a foam proportion mixer, a fire pump, a spraying pipeline, an electric valve and an ejector.
Preferably, the water tank is provided with a liquid level detection module, the liquid level detection module is used for detecting the depth of water in the water tank, the compressed gas tank is provided with an air pressure self-checking module, and the air pressure self-checking module is used for detecting the internal pressure of the compressed gas tank.
Preferably, the fault display module comprises a battery compartment numbering module and a fault code module, wherein the battery compartment numbering module is used for positioning a faulty battery compartment, and the fault code module is used for indicating a fault reason.
Preferably, the fire monitoring module comprises a carbon monoxide sensor, a temperature sensor, a smoke sensor and a pressure sensor, and the carbon monoxide sensor, the temperature sensor, the smoke sensor and the pressure sensor are used for detecting the content, temperature, smoke concentration and pressure of carbon monoxide in the battery compartment.
Preferably, the carbon monoxide sensor, the temperature sensor, the smoke sensor and the pressure sensor are all connected with a sensor self-checking module, and the sensor self-checking module is used for detecting whether a probe of the sensor is loosened.
Compared with the prior art, the invention has the beneficial effects that:
the invention has the functions of automatically detecting the looseness of the sensor probe, the pressure of the compressed gas tank, starting by one key and the like; meanwhile, different battery bins are partitioned, and fixed-point fire extinguishment can be realized according to the position of a fire; when a fire disaster happens, the lamp of the escape device in the vehicle can be actively lightened and flickers to guide escape; the system is internally provided with a storage battery, the storage battery is charged when the vehicle runs, and the storage battery is discharged when the vehicle runs, and a charging and discharging fault detection module is arranged; the system is linked to extinguish fire, and after the fire monitoring module detects fire, the compressed air foam fire extinguishing device is actively linked to extinguish the fire; the cover plate can be opened by a driver, the disposable pressing plate can be broken by fingers, so that the one-key starting switch can be started, the disposable pressing plate can be used only once, and needs to be replaced again after the fire disaster is finished, so that the driver is reminded that the fire extinguishing agent is used, and meanwhile, the accidental touch is prevented; and simultaneously, the alarm signal is sent to a control center or other positions by utilizing the own communication of the vehicle or the own G signal, and an alarm list can be automatically formed and stored through the information storage module. The fire alarm module is divided into an interior and an exterior of the vehicle, wherein the interior of the vehicle reminds a driver and passengers, the exterior of the vehicle reminds other vehicles to dodge or give an alarm by sound-light alarm, and the reminding mode is that the SOS or the fire alarm is displayed outside the vehicle.
Drawings
Fig. 1 is a sectional view of a control box of a public transportation battery compartment fire prevention and fire early warning system according to the present invention.
Fig. 2 is a logic block diagram of a public transportation battery compartment fire prevention and fire early warning system according to the present invention.
Fig. 3 is a block diagram of a fire alarm module of a public transportation battery compartment fire prevention and fire early warning system according to the present invention.
Fig. 4 is a block diagram of a fire monitoring module of a public transportation battery compartment fire prevention and fire early warning system according to the present invention.
Fig. 5 is a block diagram of a compressed air foam fire extinguishing device of a public transport battery compartment fire prevention and fire early warning system according to the present invention.
Fig. 6 is a block diagram of a fault display module of a public transportation battery compartment fire prevention and fire early warning system according to the present invention.
In the figure: 1 control box, 2 protective cover, 3 disposable pressing plate, 4 cover plate, 5 storage battery, 6 microprocessor, 7 one-key starting switch, 8 fire alarm module, 801 coding audible and visual alarm, 802 bus isolator, 803 multi-line module, 804 fire position positioning module, 9A/D conversion module, 10 fire monitoring module, 101 carbon monoxide sensor, 102 temperature sensor, 103 smoke sensor, 104 pressure sensor, 11 sensor self-checking module, 12 signal conditioning circuit module, 13 compressed air foam fire extinguishing device, 130 water tank, 131 foam storage tank, 132 foam pump, 133 air mixer, 134 foam proportion mixer, 135 spraying pipeline, 136 ejector, 137 compressed gas tank, 138 electric valve, 139 fire pump, 14 wireless communication module, 15 control center, 16119 fire rescue center, 17 fault display module, 171 battery compartment numbering module, 172 fault code module, 18 charge and discharge fault detection module and 19 information storage module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, a public transport battery compartment fire prevention and fire early warning system, including control box 1, the internally mounted of control box 1 has cylindrical shell form protection casing 2, the internally mounted of protection casing 2 has a key starting switch 7, the port of protection casing 2 is installed disposable pressing plate 3, the internally mounted of control box 1 has microprocessor 6, microprocessor 6 is connected with compressed air foam extinguishing device 13, trouble display module 17, information storage module 19, fire alarm module 8, a key starting switch 7, AD conversion module 9 is connected with signal conditioning circuit module 12, signal conditioning circuit module 12 is connected with fire monitoring module 10.
The internally mounted of control box 1 has battery 5, and battery 5 is used for giving microprocessor 6 power supply, and control box 1 side articulates there is apron 4, and battery 5 is connected with charge-discharge fault detection module 18.
The microprocessor 6 is connected with a control center 15 through a wireless communication module 14, and the control center 15 is connected with a 119 fire rescue center 16.
The fire alarm module 8 comprises a coded audible and visual alarm 801, a bus isolator 802, a multi-line module 803 and a fire position positioning module 804, wherein the coded audible and visual alarm 801 can perform audible and visual alarm and indicate escape simultaneously in a cab, inside a vehicle and outside the vehicle, the bus isolator 802 is connected to a front end protection loop of a system bus and isolates a part connected with the rear end from the system when faults such as short circuit occur, the multi-line module 803 is used for connecting a multi-line direct control point and controlled equipment, and the fire position positioning module 804 is used for determining the fire occurrence position.
The compressed air foam fire extinguishing device 13 comprises a water tank 130, a foam pump 132, a foam storage tank 131, an air mixer 133, a compressed air tank 137, a foam proportioning mixer 134, a fire pump 139, a spray line 135, an electric valve 138 and an ejector 136.
The water tank 130 is provided with a liquid level detection module 20, the liquid level detection module 20 is used for detecting the depth of water in the water tank 130, the compressed air tank 137 is provided with an air pressure self-checking module 21, and the air pressure self-checking module 21 is used for detecting the internal pressure of the compressed air tank 137.
The failure display module 17 includes a battery compartment numbering module 171, and a failure code module 172, where the battery compartment numbering module 171 is used for locating a failed battery compartment, and the failure code module 172 is used for indicating a failure cause.
The fire monitoring module 10 comprises a carbon monoxide sensor 101, a temperature sensor 102, a smoke sensor 103 and a pressure sensor 104, wherein the carbon monoxide sensor 101, the temperature sensor 102, the smoke sensor 103 and the pressure sensor 104 are used for detecting the content, temperature, smoke concentration and pressure of carbon monoxide in the battery compartment.
The carbon monoxide sensor 101, the temperature sensor 102, the smoke sensor 103 and the pressure sensor 104 are all connected with a sensor self-checking module 11, and the sensor self-checking module 11 is used for detecting whether a probe of the sensor is loosened.
The working principle is as follows:
in the invention, the control box 1 is arranged on a public transport means, and the carbon monoxide sensor 101, the temperature sensor 102, the smoke sensor 103 and the pressure sensor 104 are used for detecting the carbon monoxide content, the temperature, the smoke concentration and the pressure intensity in the battery compartment, thereby forming real-time monitoring on the interior of the battery compartment, and detecting and transmitting a fire signal in time at the first time when a fire breaks out.
The sensor self-checking module 11 is used for detecting whether the probe of the sensor is loosened, so that the working stability of the sensor can be ensured, and the problem of misoperation or incapability of responding in case of fire is avoided. The battery compartment numbering module 171 is used for locating a battery compartment with a fault, and the fault code module 172 is used for indicating a fault reason, so that maintenance personnel can maintain the battery compartment conveniently and timely.
The liquid level detection module 20 is used for detecting the depth of water in the water tank 130, and the air pressure self-checking module 21 is used for detecting the internal pressure of the compressed air tank 137, so that a user is reminded of adding water and increasing air pressure in time when water is short or the pressure is low, and the sufficiency of water sources and aerodynamic force when a fire disaster happens is guaranteed.
The coded audible and visual alarm 801 can perform audible and visual alarm and indicate escape simultaneously in a cab, inside a vehicle and outside the vehicle, the alarm is divided into inside the vehicle and outside the vehicle, drivers and passengers are reminded in the vehicle, the audible and visual alarm outside the vehicle is reminded of evading other vehicles or alarming, and the reminding mode is that the outside of the vehicle displays SOS or fire alarm and the like. The bus isolator 802 is connected to a system bus front-end protection loop to isolate a rear-end connected part from the system when a fault such as a short circuit occurs, the multi-line module 803 is used for connecting a multi-line direct control point and controlled equipment, and the fire position positioning module 804 is used for determining a fire occurrence position.
The alarm signal can be automatically formed into an alarm list through the information storage module 19 and stored. The storage battery 5 is charged while the vehicle is running, and discharged the rest of the time, and is provided with a charge-discharge failure detection module 18.
When a fire occurs, a fire monitoring module 10 detects a signal and transmits the signal to a microprocessor 6 through a signal conditioning circuit module 12 and an A/D conversion module 9 in sequence, the microprocessor 6 receives the signal, a fire alarm module 8 is started and determines the position of the fire, information is transmitted to a control center 15, the control center 15 is networked with a 119 fire rescue center 16, so that rescue of the 119 fire rescue center 16 can be obtained at the first time, meanwhile, a driver can open a cover plate 4 and press a one-time pressing plate 3 with fingers, so that a one-key starting switch 7 can be started, the one-time pressing plate 3 can be used only once, when the fire is finished, the one-time pressing plate 3 needs to be replaced again, a compressed air foam fire extinguishing device 13 starts to work, a fire pump 132 pumps water into a foam proportioning mixer 134 from a water tank 130, foams in a foam proportioning mixer 134 are pumped into a foam proportioning mixer 134 through a foam pump 132, the foams in a foam storage tank 131 are mixed and fed into In the middle of the fire extinguishing system, the mixed fire extinguishing liquid is fed into the spray line 135 and sprayed out from the sprayer 136 under the action of the high-pressure gas in the compressed gas tank 137, so that fire is extinguished, and the flow rate of the fire extinguishing agent can be adjusted through the electric butterfly valve 138.
In conclusion, the invention has the functions of automatically detecting the looseness of the sensor probe, the pressure of the compressed air tank 137, starting by one key and the like; meanwhile, different battery bins are partitioned, and fixed-point fire extinguishment can be realized according to the position of a fire; when a fire disaster happens, the lamp of the escape device in the vehicle can be actively lightened and flickers to guide escape; the system is internally provided with a storage battery 5, the storage battery is charged when the vehicle runs, and the storage battery is discharged when the vehicle runs, and a charging and discharging fault detection module 18 is arranged; the system is linked to extinguish fire, and after the fire monitoring module 10 detects fire, the compressed air foam fire extinguishing device 13 is actively linked to extinguish the fire; the driver can open the cover plate 4 and press the disposable pressing plate 3 with fingers, so that the one-key starting switch 7 can be started, the disposable pressing plate 3 can be used only once, and needs to be replaced again after the fire disaster is completed, so that the driver is reminded that the fire extinguishing agent is used, and meanwhile, the accidental touch is prevented; the alarm signal is sent to the control center 15 or other positions by using the own communication of the vehicle or the own 5G signal, and an alarm list can be automatically formed and stored through the information storage module 19. The fire alarm module 8 is divided into an inside and an outside of the vehicle, the inside of the vehicle reminds a driver and passengers, the outside of the vehicle gives an audible and visual alarm to remind other vehicles of dodging or giving an alarm, and the reminding mode is that the outside of the vehicle displays SOS or fire alarm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A public transport battery compartment fire prevention and fire early warning system comprises a control box (1), it is characterized in that a cylindrical shell-shaped protective cover (2) is arranged in the control box (1), a one-key starting switch (7) is arranged in the protective cover (2), a disposable pressing plate (3) is arranged at the port of the protective cover (2), a microprocessor (6) is arranged in the control box (1), the microprocessor (6) is connected with a compressed air foam fire extinguishing device (13), a fault display module (17), an information storage module (19), a fire alarm module (8), a one-key starting switch (7) and an A/D conversion module (9), the A/D conversion module (9) is connected with a signal conditioning circuit module (12), the signal conditioning circuit module (12) is connected with a fire monitoring module (10).
2. The fire prevention and fire early warning system for the public transportation battery compartment is characterized in that a storage battery (5) is installed inside the control box (1), the storage battery (5) is used for supplying power to the microprocessor (6), a cover plate (4) is hinged to the side edge of the control box (1), and the storage battery (5) is connected with a charging and discharging fault detection module (18).
3. A fire prevention and fire early warning system of a public transportation battery compartment as claimed in claim 1, wherein the microprocessor (6) is connected with a control center (15) through a wireless communication module (14), and the control center (15) is connected with a 119 fire rescue center (16).
4. The public transportation battery compartment fire prevention and fire early warning system according to claim 1, wherein the fire alarm module (8) comprises a coded audible and visual alarm (801), a bus isolator (802), a multi-line module (803) and a fire position locating module (804), the coded audible and visual alarm (801) can perform audible and visual alarm and indicate escape simultaneously in a cab, a car and a car, the bus isolator (802) is connected to a system bus front end protection loop to isolate a rear end connected part from the system when a short circuit and other faults occur, the multi-line module (803) is used for connecting a multi-line direct control point and controlled equipment, and the fire position locating module (804) is used for determining the fire occurrence position.
5. A mass transit battery compartment fire prevention and fire pre-warning system according to claim 1, wherein the compressed air foam fire extinguishing means (13) comprises a water tank (130), a foam pump (132), a foam storage tank (131), an air mixer (133), a compressed air tank (137), a foam proportioner (134), a fire pump (139), a spray line (135), an electric valve (138), and an ejector (136).
6. A public transportation battery compartment fire prevention and fire early warning system according to claim 5, wherein the water tank (130) is provided with a liquid level detection module (20), the liquid level detection module (20) is used for detecting the depth of water inside the water tank (130), the compressed gas tank (137) is provided with a gas pressure self-checking module (21), and the gas pressure self-checking module (21) is used for detecting the internal pressure of the compressed gas tank (137).
7. A public transportation battery compartment fire prevention and fire early warning system according to claim 1, wherein the failure display module (17) comprises a battery compartment numbering module (171), a failure code module (172), the battery compartment numbering module (171) is used for locating a failed battery compartment, and the failure code module (172) is used for indicating the reason of failure.
8. A public transportation battery compartment fire prevention and fire early warning system according to claim 1, wherein the fire monitoring module (10) comprises a carbon monoxide sensor (101), a temperature sensor (102), a smoke sensor (103) and a pressure sensor (104), and the carbon monoxide sensor (101), the temperature sensor (102), the smoke sensor (103) and the pressure sensor (104) are used for detecting the content, temperature, smoke concentration and pressure of carbon monoxide in the battery compartment.
9. The fire prevention and fire early warning system for the public transportation battery compartment as claimed in claim 8, wherein the carbon monoxide sensor (101), the temperature sensor (102), the smoke sensor (103) and the pressure sensor (104) are all connected with a sensor self-checking module (11), and the sensor self-checking module (11) is used for detecting whether a probe of the sensor is loosened.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110082268.4A CN112950886A (en) | 2021-01-21 | 2021-01-21 | Public transport battery compartment fire prevention and fire early warning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110082268.4A CN112950886A (en) | 2021-01-21 | 2021-01-21 | Public transport battery compartment fire prevention and fire early warning system |
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| CN112950886A true CN112950886A (en) | 2021-06-11 |
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| CN202110082268.4A Pending CN112950886A (en) | 2021-01-21 | 2021-01-21 | Public transport battery compartment fire prevention and fire early warning system |
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| CN112107822A (en) * | 2020-08-13 | 2020-12-22 | 常州博瑞电力自动化设备有限公司 | Compressed air foam fire extinguishing device |
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Application publication date: 20210611 |