CN111784960A - Fire source detection system and detection method - Google Patents
Fire source detection system and detection method Download PDFInfo
- Publication number
- CN111784960A CN111784960A CN202010629243.7A CN202010629243A CN111784960A CN 111784960 A CN111784960 A CN 111784960A CN 202010629243 A CN202010629243 A CN 202010629243A CN 111784960 A CN111784960 A CN 111784960A
- Authority
- CN
- China
- Prior art keywords
- fire
- fire source
- analysis processor
- signal analysis
- source detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 96
- 239000000779 smoke Substances 0.000 claims abstract description 76
- 238000004458 analytical method Methods 0.000 claims abstract description 65
- 238000004891 communication Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000007480 spreading Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
Abstract
The invention discloses a fire source detection system and a detection method, wherein the system comprises: the fire source detection device is arranged on the fire source detection point and used for detecting and outputting a fire source signal; and the signal analysis processor is in communication connection with the fire source detection device and is used for judging whether a fire occurs according to the received fire source signal and forming a fire judgment result. The fire source detection device provided by the invention detects the fire source by adopting the infrared flame sensor or the fire source detection device consisting of a plurality of smoke detectors of different types, can send out an alarm at the first time when the fire source appears, greatly shortens the early warning time when the fire occurs, can effectively prevent the fire from spreading, reduces the loss and ensures the safety. And after the fire detection device is in communication connection with external equipment, the fire source detection condition and the fire condition judgment condition can be sent to the external equipment, so that external personnel can know the fire scene condition at the first time.
Description
Technical Field
The invention relates to the technical field of fire prevention, in particular to a fire source detection system and a fire source detection method.
Background
The fire disaster is a disaster which has the highest occurrence frequency in the current society and integrates artificial and natural disasters. The automatic fire detection technology is considered as a special technology for detecting and identifying early fire characteristic signals in a noise environment, and can effectively detect real fire signals and realize early detection and alarm of fire. At present, a smoke sensor is widely used for detecting fire signals, but the smoke sensor can detect a fire source only when the fire reaches a certain degree and generates enough smoke, so that the smoke sensor cannot accurately detect the fire source at the earliest stage of a fire, namely when the fire source is just formed.
At present, other products for detecting the fire source exist in the market, but most of the products are developed based on various types of smoke sensors, and the technical problem that the smoke sensors cannot accurately detect the fire source is not solved. Although some products claim to have positive effect on detecting the fire source, the fire source detection accuracy is not high in the practical application process, and the positive effect on preventing and controlling the fire cannot be achieved at all.
Disclosure of Invention
The present invention is directed to a fire source detection system and a fire source detection method to solve the above-mentioned technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
there is provided a fire detection system comprising:
the fire source detection device is arranged on the fire source detection point and used for detecting and outputting a fire source signal;
the signal analysis processor is in communication connection with the fire source detection device and is used for judging whether a fire occurs according to the received fire source signal and forming a fire judgment result;
the fire source detection system further comprises:
the alarm circuit is electrically connected with the signal analysis processor and is used for sending an alarm signal output by the signal analysis processor to an alarm device for prompting and alarming;
the communication circuit is electrically connected with the signal analysis processor and is used for realizing the communication connection between the fire source detection device and the signal analysis processor and/or the communication connection between the fire source detection system and external equipment;
the liquid crystal display circuit is electrically connected with the signal analysis processor and is used for displaying the fire judgment result through a liquid crystal display screen;
and the reset circuit is electrically connected with the signal analysis processor and is used for resetting the system after the fire source detection system gives an alarm.
In a preferred embodiment of the present invention, the fire source detecting device includes any one or more of an infrared flame sensor, a photoelectric smoke detector, and an ionic smoke detector.
In a preferred embodiment of the present invention, the fire source detecting device includes at least 3 photoelectric smoke detectors and at least 2 ionic smoke detectors.
In a preferred embodiment of the present invention, the fire source detection device includes at least 3 of the ionic type smoke detectors and at least 2 of the photoelectric type smoke detectors.
As a preferable scheme of the present invention, the infrared flame sensor is connected to the signal analysis processor through a sensing circuit, the sensing circuit includes a voltage comparator U1, an LED lamp D1 and a connecting element P1, an anode input end of the voltage comparator U1 is connected to the second port of the connecting element P1, a first port of the connecting element P1 is connected to a resistor R1 and then grounded, and the infrared flame sensor is connected to the connecting element P1 and then electrically connected to the sensing circuit;
the negative electrode input end of the voltage comparator U1 is connected with the sliding end of a slide rheostat R3, one fixed end of the slide rheostat R3 is connected with a power supply VCC, and is grounded after being connected with a capacitor C1; the other fixed end of the slide rheostat R3 is grounded;
the power supply end of the voltage comparator U1 is connected with a power supply VCC and is also connected with the anode of the LED lamp D1, and the cathode of the LED lamp D1 is connected with a resistor R4 and then is connected with the output end of the voltage comparator U1;
the output terminal of the voltage comparator U1 is connected to a designated port or a designated pin of the signal analysis processor.
As a preferred embodiment of the present invention, the output terminal of the voltage comparator U1 is connected to a designated port or a designated pin of the signal analysis processor through a signal amplification circuit.
As a preferable scheme of the invention, the signal analysis processor is an S3C44B0 chip or a PIC16C71 type single chip microcomputer.
The invention also provides a fire source detection method which is realized by the fire source detection system and comprises the following steps:
at least 5 smoke detectors arranged on the same fire source monitoring point simultaneously monitor the fire source, and respectively send the monitored smoke signals to the signal analysis processor after signal amplification;
the signal analysis processor performs analog-to-digital conversion on the received smoke sensing signal and then enters a process for judging whether a fire occurs, and the method for judging whether the fire occurs on the fire source monitoring point by the signal analysis processor comprises the following steps:
when 3 or more smoke-sensitive signals sent by the smoke-sensitive detectors are received at the same time, the signal analysis processor judges that fire occurs on the fire source monitoring point, generates an alarm signal and outputs the alarm signal, otherwise, the signal analysis processor does not judge that fire occurs;
the signal analysis processor sends the alarm signal to the alarm device through the alarm circuit to drive the alarm device to prompt and alarm.
In a preferred embodiment of the present invention, the smoke detector includes a photoelectric type smoke detector and an ionic type smoke detector.
In a preferred embodiment of the present invention, the fire source detecting device is composed of at least 3 photoelectric smoke detectors and at least 2 ionic smoke detectors, or the fire source detecting device is composed of at least 3 ionic smoke detectors and at least 2 photoelectric smoke detectors.
The fire source detection device provided by the invention detects the fire source by adopting the infrared flame sensor or the fire source detection device consisting of a plurality of smoke detectors of different types, can send out an alarm at the first time when the fire source appears, greatly shortens the early warning time when the fire occurs, can effectively prevent the fire from spreading, reduces the loss and ensures the safety. And after the fire detection device is in communication connection with external equipment, the fire source detection condition and the fire condition judgment condition can be sent to the external equipment, so that external personnel can know the fire scene condition at the first time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a block diagram of a fire source detection system according to one or two embodiments of the present invention;
FIG. 2 is a circuit configuration diagram of the sensing circuit connecting the flame sensor and the signal analysis processor in the first embodiment;
FIG. 3 is a schematic diagram of the connection between the flame sensor and the signal analysis processor according to the first embodiment;
fig. 4 is a flowchart illustrating a method for detecting a fire source according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Fig. 1 is a block diagram illustrating a fire source detection system according to a first embodiment of the present invention, and referring to fig. 1, the fire source detection system according to the first embodiment includes:
the fire source detection device 1 is arranged on the fire source detection point and used for detecting and outputting a fire source signal; in the first embodiment, the fire source detector is preferably an infrared flame sensor. The flame sensor is a sensor for searching for a fire source, and may also be used to detect the brightness of light. Because the flame radiation intensity and the wavelength distribution of different combustion objects are different, the flame sensors with different sensitivities can detect the flames of heat sources with different wavelengths. In this embodiment, a special infrared receiving tube is used as a fire source detecting element of the flame sensor to detect flames or other fire sources with wavelengths of 760 to 1100 nm (flames with wavelengths of 760 to 1100 nm are the most common types of fire sources). Then, according to the schematic wiring diagram of the flame sensor and the signal analysis processor shown in fig. 3, the negative electrode of the infrared receiving tube is connected to a power VCC (5V voltage), the positive electrode of the infrared receiving tube is grounded after being connected to a 10 kilo-ohm resistor, one end of a jumper is connected to the positive electrode of the infrared receiving tube, and the other end of the jumper is connected to a designated port or a designated pin of the signal analysis processor as an analog signal output port of the infrared receiving tube, or is connected to the designated port or the designated pin of the signal analysis processor after being processed by an analog signal to digital signal through an analog-to-digital converter. The infrared receiving tube is used for converting the detected fire source wavelength signal or brightness signal into a level signal and outputting the level signal. The signal analysis processor analyzes and processes the level signal output by the infrared receiving tube after analog-to-digital conversion to the digital signal of the relevant fire source detection information so as to judge whether a fire occurs and the position of the fire, and even can roughly judge the type of the fire source according to the detected flame wavelength.
Referring to fig. 1, the fire source detecting system according to the first embodiment further includes:
the signal analysis processor 2 is in communication connection with the fire source detection device 1 and is used for judging whether a fire occurs according to the received fire source signal and forming a fire judgment result (the fire source can be judged to be detected in a mode of generating an alarm signal); in this embodiment, the signal analyzing processor is preferably an S3C44B0 chip or a PIC16C71 single chip microcomputer.
The alarm circuit 3 is electrically connected with the signal analysis processor 2 and is used for sending an alarm signal output by the signal analysis processor to an alarm device for prompting and alarming; since there are many existing alarm circuits that can be applied to the fire source detection system provided in this embodiment, and the circuit structure of the alarm circuit is not within the scope of the claims of the present invention, the specific circuit structure of the alarm circuit is not described herein, the input terminal of the alarm circuit is connected to the designated port or the designated pin of the signal analysis processor, the output terminal of the alarm circuit is connected to the alarm device, the alarm device prompts an alarm according to the received alarm signal, and the alarm mode is preferably an audible and visual alarm mode.
Set up a plurality of flame sensors or set up a plurality of flame sensors and carry out the fire source detection simultaneously at certain detection space from different angles in same detection position, be favorable to improving the accuracy of flame detection, but a plurality of flame sensors of laying lead to the wiring too complicated if connect signal analysis processor through wired communication mode, so in order to solve this problem, please continue to refer to fig. 1, the fire source detection system that this embodiment provided still includes:
and the communication circuit 4 is electrically connected with the signal analysis processor 2 and is used for realizing the communication connection (including wired communication connection and wireless communication connection) between the fire source detection device and the signal analysis processor. There are many communication circuits available for the system, and the specific circuit structure of the communication circuit is not within the scope of the claimed invention, so the specific circuit structure of the communication circuit is not described herein.
It should be noted that, the communication circuit also has another function, in order to realize the remote control of the system, the communication circuit is used for realizing the communication connection (including the wired communication connection or the wireless communication connection) between the fire source detection system and the external device, the signal analysis processor can send the fire source detection condition and the fire source analysis condition to the external device, and the user can remotely control the system to execute the relevant fire source detection and analysis instruction, thereby improving the intelligent degree and the practicability of the system, and being beneficial to reducing the difficulty of product development market.
In order to visually display the fire source detection condition or the fire source analysis condition of the system, the system further comprises:
and the liquid crystal display circuit 5 is electrically connected with the signal analysis processor 2 and is used for displaying the fire source detection condition and/or the fire source judgment result through a liquid crystal display screen. The conventional liquid crystal display circuits applicable to the present invention are many, and therefore, the specific circuit structure of the liquid crystal display circuit is not described here.
In addition, the system further comprises:
and the reset circuit 6 is electrically connected with the signal analysis processor 2 and is used for resetting the system after the fire source detection system gives an alarm so as to restore the system to enter a fire source detection state.
In order to visually display whether the infrared flame sensor detects a fire source and send a detected flame signal to the signal analysis processor, the embodiment provides a sensing circuit connected with the infrared flame sensor and the signal analysis processor, which illustrates a schematic circuit structure of the sensing circuit connected with the flame sensor and the signal analysis processor, please refer to fig. 2, the sensing circuit includes a voltage comparator U1, an LED lamp D1 and a connecting piece P1, a positive input end of the voltage comparator U1 is connected with a second port of the connecting piece P1, a first port of the connecting piece P1 is connected with a resistor R1 and then grounded, and the infrared flame sensor is electrically connected with the sensing circuit after being connected with the connecting piece P1;
the negative input end of the voltage comparator U1 is connected with the sliding end of a slide rheostat R3, one fixed end of the slide rheostat R3 is connected with a power supply VCC (VCC voltage is configured according to actual needs), and is connected with a capacitor C1 and then is grounded; the other fixed end of the slide rheostat R3 is grounded;
the power supply end of the voltage comparator U1 is connected with a power supply VCC and is simultaneously connected with the anode of the LED lamp D1, and the cathode of the LED lamp D1 is connected with a resistor R4 and then is connected with the output end of the voltage comparator U1;
the output of the voltage comparator U1 is connected to a designated port or pin of the signal analysis processor.
In this embodiment, the voltage comparator U1 is model LM 358D.
The principle of the sensing circuit indicating whether the flame sensor detects a fire source is briefly described as follows:
when the flame sensor detects a fire source, the partial voltage of the positive input end of the LM358D is low and is less than that of the negative input end of the LM358D, the output of the LM358D is low, and the LED lamp D1 is turned on to indicate that the flame sensor detects the fire source at the moment.
When the flame sensor does not detect a fire source, the positive input end of the LM358D has high voltage division and is higher than the negative input end, the LM358D outputs high voltage, and the LED lamp D1 is not lighted at the moment, which indicates that the flame sensor does not detect the fire source.
In addition, generally, since the fire source signal detected by the flame sensor is weak, the present embodiment is preferably connected to a designated port or a designated pin of the signal analysis processor at the output end of the voltage comparator U1 through a signal amplification circuit. Since there are many signal amplifying circuits that can be applied to the present invention, and the specific circuit structure of the signal amplifying circuit is not within the scope of the claims of the present invention, the circuit structure of the signal amplifying circuit is not described herein.
Example two
The second embodiment is different from the first embodiment in that the fire source detection device adopted by the fire source detection system provided by the second embodiment is a smoke-sensitive detector. The smoke detector includes a photoelectric smoke detector, an ionic smoke detector, and the like, and the operation principle of the photoelectric smoke detector and the ionic smoke detector is not described here.
The photoelectric smoke detector is sensitive to fire caused by smoldering of decorative fabrics such as furniture and bedding, but has a slow detection response to kitchen and other places where the fire is fast burning and may generate flames. The advantages and disadvantages of the ionic type smoke detector are just opposite to those of the photoelectric type smoke detector. Therefore, the photoelectric type or ionic type smoke detectors have great detection limitation when being used independently, and most of the smoke detectors have low detection sensitivity to fire sources, so that in order to solve the problem, through repeated tests, in the embodiment of the invention, a fire source detection device is formed by at least 3 photoelectric type smoke detectors and at least 2 ionic type smoke detectors, or a fire source detection point is simultaneously detected by a fire source detection device formed by at least 3 ionic type smoke detectors and at least 2 photoelectric type smoke detectors, and the fact that the fire source detection device formed by at least more than 5 smoke detectors of different types is adopted to detect the fire source has higher fire source detection precision. This discovery breaks through the recognition that traditional smoke detectors cannot detect a fire source.
In order to reduce the application cost of the smoke detector, the second embodiment preferably includes 3 photoelectric smoke detectors and 2 ionic smoke detectors to form a fire source detection device for detecting the fire source. Or preferably, the fire source detection device consists of 3 ionic type smoke detectors and 2 photoelectric type smoke detectors to detect the fire source.
The invention also provides a fire source detection method, which is implemented by the fire source detection system provided by the second embodiment, and referring to fig. 4, the fire source detection method comprises the following steps:
step S1, at least 5 smoke detectors (at least 3 photoelectric smoke detectors and at least 2 ionic smoke detectors, or at least 3 ionic smoke detectors and at least 2 photoelectric smoke detectors) arranged on the same fire source monitoring point simultaneously monitor the fire source, and respectively send the monitored smoke signals to a signal analysis processor after signal amplification processing;
step S2, the signal analysis processor carries out analog-to-digital conversion on the received smoke-sensitive signal and then enters a process for judging whether a fire occurs, and the method for judging whether the fire occurs on the fire source monitoring point by the signal analysis processor is as follows:
when smoke signals sent by more than 3 smoke detectors are received at the same time, the signal analysis processor judges that fire occurs on a fire source monitoring point, generates an alarm signal and outputs the alarm signal, otherwise, the signal analysis processor does not judge that fire occurs;
and step S3, the signal analysis processor sends the alarm signal to the alarm device through the alarm circuit to drive the alarm device to prompt the alarm.
The fire source detection device provided by the invention detects the fire source by adopting the infrared flame sensor or the fire source detection device consisting of a plurality of smoke detectors of different types, can send out an alarm at the first time when the fire source appears, greatly shortens the early warning time when the fire occurs, can effectively prevent the fire from spreading, reduces the loss and ensures the safety. And after the fire detection device is in communication connection with external equipment, the fire source detection condition and the fire condition judgment condition can be sent to the external equipment, so that external personnel can know the fire scene condition at the first time.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (10)
1. A fire detection system, comprising:
the fire source detection device is arranged on the fire source detection point and used for detecting and outputting a fire source signal;
the signal analysis processor is in communication connection with the fire source detection device and is used for judging whether a fire occurs according to the received fire source signal and forming a fire judgment result;
the fire source detection system further comprises:
the alarm circuit is electrically connected with the signal analysis processor and is used for sending an alarm signal output by the signal analysis processor to an alarm device for prompting and alarming;
the communication circuit is electrically connected with the signal analysis processor and is used for realizing the communication connection between the fire source detection device and the signal analysis processor and/or the communication connection between the fire source detection system and external equipment;
the liquid crystal display circuit is electrically connected with the signal analysis processor and is used for displaying the fire judgment result through a liquid crystal display screen;
and the reset circuit is electrically connected with the signal analysis processor and is used for resetting the system after the fire source detection system gives an alarm.
2. The fire source detection system of claim 1, wherein the fire source detection device comprises any one or more of an infrared flame sensor, a photoelectric type smoke detector, and an ionic type smoke detector.
3. The fire source detection system of claim 2, wherein the fire source detection device is comprised of at least 3 of the photoelectric type smoke detectors and at least 2 of the ionic type smoke detectors.
4. The fire source detection system of claim 2, wherein the fire source detection device is comprised of at least 3 of the ionic smoke detectors and at least 2 of the photoelectric smoke detectors.
5. The fire detection system of claim 2, wherein the infrared flame sensor is connected to the signal analysis processor through a sensing circuit, the sensing circuit comprises a voltage comparator U1, an LED lamp D1 and a connecting element P1, the positive input end of the voltage comparator U1 is connected to the second port of the connecting element P1, the first port of the connecting element P1 is connected to a resistor R1 and then grounded, and the infrared flame sensor is connected to the connecting element P1 and then electrically connected to the sensing circuit;
the negative electrode input end of the voltage comparator U1 is connected with the sliding end of a slide rheostat R3, one fixed end of the slide rheostat R3 is connected with a power supply VCC, and is grounded after being connected with a capacitor C1; the other fixed end of the slide rheostat R3 is grounded;
the power supply end of the voltage comparator U1 is connected with a power supply VCC and is also connected with the anode of the LED lamp D1, and the cathode of the LED lamp D1 is connected with a resistor R4 and then is connected with the output end of the voltage comparator U1;
the output terminal of the voltage comparator U1 is connected to a designated port or a designated pin of the signal analysis processor.
6. The fire detection system of claim 5, wherein the output of the voltage comparator U1 is connected to a designated port or a designated pin of the signal analysis processor through a signal amplification circuit.
7. The fire detection system of claim 5 wherein the signal analysis processor is an S3C44B0 chip or a PIC16C71 type single-chip microcomputer.
8. A fire source detection method implemented by the fire source detection system according to any one of claims 1 to 7, comprising:
at least 5 smoke detectors arranged on the same fire source monitoring point simultaneously monitor the fire source, and respectively send the monitored smoke signals to the signal analysis processor after signal amplification;
the signal analysis processor performs analog-to-digital conversion on the received smoke sensing signal and then enters a process for judging whether a fire occurs, and the method for judging whether the fire occurs on the fire source monitoring point by the signal analysis processor comprises the following steps:
when 3 or more smoke-sensitive signals sent by the smoke-sensitive detectors are received at the same time, the signal analysis processor judges that fire occurs on the fire source monitoring point, generates an alarm signal and outputs the alarm signal, otherwise, the signal analysis processor does not judge that fire occurs;
the signal analysis processor sends the alarm signal to the alarm device through the alarm circuit to drive the alarm device to prompt and alarm.
9. The method of claim 8, wherein the smoke detector comprises a photoelectric type smoke detector and an ionic type smoke detector.
10. The method according to claim 9, wherein the fire detection device is composed of at least 3 photoelectric smoke detectors and at least 2 ionic smoke detectors, or the fire detection device is composed of at least 3 ionic smoke detectors and at least 2 photoelectric smoke detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629243.7A CN111784960A (en) | 2020-07-02 | 2020-07-02 | Fire source detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629243.7A CN111784960A (en) | 2020-07-02 | 2020-07-02 | Fire source detection system and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111784960A true CN111784960A (en) | 2020-10-16 |
Family
ID=72758300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010629243.7A Withdrawn CN111784960A (en) | 2020-07-02 | 2020-07-02 | Fire source detection system and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111784960A (en) |
-
2020
- 2020-07-02 CN CN202010629243.7A patent/CN111784960A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11326955B2 (en) | Intelligent flame thermogram detection apparatus and method using infrared | |
| EP1540615B1 (en) | Detector with ambient photon sensor and other sensors | |
| US7068177B2 (en) | Multi-sensor device and methods for fire detection | |
| US8890696B2 (en) | Fire detector | |
| CN109155097A (en) | Accelerate to issue the Fike detector of potential fire alarm report based on it with the photodiode for sense ambient light | |
| CN111739251A (en) | Fire source detection and positioning system and method | |
| JPS6014399B2 (en) | Physical change monitoring device | |
| CN110969794A (en) | Kitchen fire alarm system and method for detecting human body in front of cooking bench | |
| CN110880230A (en) | Intelligent combustible gas detector and alarm method | |
| CN210271155U (en) | Composite smoke-sensing detection labyrinth | |
| CN212302696U (en) | Photoelectric smoke sensor based on NB-IOT | |
| CN111784960A (en) | Fire source detection system and detection method | |
| JP3045645B2 (en) | Flame detector | |
| KR20080020344A (en) | System for notifying a fire and method at the same | |
| CN209859263U (en) | Fire alarm device based on zinc oxide ultraviolet photoelectric detector | |
| JPH07262464A (en) | Fire sensor and fire receiver | |
| KR102263031B1 (en) | Flame Detection System For Amplifies Fire source To Detect Flames | |
| CN209312193U (en) | A kind of miniature smoke alarm | |
| CN210442925U (en) | Multi-parameter composite flame detector | |
| CN106960540A (en) | A kind of safety monitoring system based on information technology | |
| CN205486617U (en) | Fire alarm ware based on singlechip | |
| CN106327761A (en) | Infrared sensing alarm system | |
| JP3426078B2 (en) | Sensor, analog monitoring system, and abnormality monitoring method | |
| CN215573388U (en) | Microwave infrared intelligent monitor | |
| CN216697477U (en) | Smoke detection circuit and smoke alarm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201016 |