CN212256534U - High-speed false alarm prevention three-infrared flame detector - Google Patents
High-speed false alarm prevention three-infrared flame detector Download PDFInfo
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- CN212256534U CN212256534U CN202021225255.5U CN202021225255U CN212256534U CN 212256534 U CN212256534 U CN 212256534U CN 202021225255 U CN202021225255 U CN 202021225255U CN 212256534 U CN212256534 U CN 212256534U
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Abstract
The utility model discloses a prevent three infrared flame detectors of wrong report at a high speed, including infrared sensor unit, infrared signal frequency-selecting amplifier unit, processing unit and output unit, the infrared sensor unit contains three infrared sensor, infrared signal frequency-selecting amplifier unit contains three routes frequency-selecting amplifier circuit, processing unit contains treater, crystal oscillator, procedure download debugging interface and treater peripheral resistance-capacitance circuit, output unit contains 485 CAN output, current output, relay output and wireless alarm output. The utility model discloses in, flame detector's infrared sensor unit can realize the detection to flame at three infrared band, and the output energy state through contrast interference wave band, flame wave band carries out the judgement of fire alarm and the processing of wrong report, will handle the value of value contrast database, finally obtains to satisfy flame detector simultaneously high-speed, prevent the result of misreporting, is worth wideling popularize.
Description
Technical Field
The utility model relates to a flame detection field especially relates to a prevent three infrared flame detectors of wrong report at a high speed.
Background
The flame detector is one of the components of the automatic fire alarm system, although the fire alarm system is set for early fire alarm, it cannot alarm completely accurately without error, for various objective reasons, the various characteristic detectors in a fire alarm system may not provide a timely or appropriate alarm, and if the flame detectors are in the presence of rapidly expanding fire scales and rapidly increasing combustion products, the performance characteristics become less important, this is because the fire signature is so distinct, that detection alarm systems of different sensitivities alarm almost simultaneously, therefore, the response of the flame detector to the initial flame stage is better, the time lead relative to the perception of personnel is better, and sufficient time is provided for the extinguishing of the flame, the method has practical significance for the conditions of fire extinguishing, fire fighting, evacuation and the like in fire occasions with high reaction efficiency requirements.
However, the three infrared detectors in China at present have low alarm response speed, cannot give out fire alarm in time, and are easily influenced by ambient light, lightning and sunlight to cause false alarm.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a high-speed false alarm prevention three-infrared flame detector.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a high-speed false alarm prevention three-infrared flame detector comprises an infrared sensor unit, an infrared signal frequency-selecting amplification unit, a processing unit and an output unit, wherein the infrared sensor unit comprises three infrared sensors, namely an infrared sensor 1, an infrared sensor 2 and an infrared sensor 3, the infrared signal frequency-selecting amplification unit comprises three paths of frequency-selecting amplification circuits, each frequency-selecting amplification circuit comprises a resistor, a capacitor, an operational amplifier and a wiring terminal, the three paths of frequency-selecting amplification circuits are connected through circuit board wiring, the processing unit comprises a processor, a crystal oscillator, a program downloading and debugging interface and a processor peripheral resistance-capacitance circuit, the output unit comprises 485/CAN output, current output, relay output and wireless alarm output, the infrared sensor 1, the infrared sensor 2 and the infrared sensor 3 are respectively connected with the three paths of frequency-selecting amplification circuits, the three frequency-selecting amplifying circuits are all connected with the processing unit, and the processing unit is simultaneously connected with the 485/CAN output, the current output, the relay output and the wireless alarm output.
As a further description of the above technical solution:
the detection waveband of the infrared sensor 1 is infrared radiation with the wavelength of 3.8um interference light source waveband.
As a further description of the above technical solution:
the detection wave band of the infrared sensor 2 is the infrared radiation of the interference light source wave band with the wavelength of 5.0 um.
As a further description of the above technical solution:
the detection waveband of the infrared sensor 3 is infrared radiation of a flame radiation waveband with the wavelength of 4.35 um.
As a further description of the above technical solution:
and the frequency-selective amplifying circuits corresponding to the three infrared sensors adopt the same circuit structure.
As a further description of the above technical solution:
the band-pass frequencies in the three frequency-selecting amplifying circuits are all 3 Hz-30 Hz.
As a further description of the above technical solution:
the processor is a 16-bit high performance processor.
The utility model discloses following beneficial effect has:
the utility model discloses in, flame detector's infrared sensor unit can realize the detection to flame at three infrared band, and the output energy state through contrast interference wave band, flame wave band carries out the judgement of fire alarm and the processing of wrong report, will handle the value of value contrast database, finally obtains the result that can satisfy flame detector simultaneously high speed, prevent wrong report, and the detector has high sound speed, can be applied to the place that inflammable and explosive required height, is worth wideling popularize.
Drawings
FIG. 1 is a block diagram of a high-speed false alarm prevention three-infrared flame detector according to the present invention;
FIG. 2 is a circuit diagram of a processing unit of a high-speed false alarm prevention three-infrared flame detector provided by the present invention;
FIG. 3 is a schematic diagram of a frequency-selective amplifying circuit of a high-speed false alarm prevention three-infrared flame detector provided by the present invention;
FIG. 4 is a spectrum of a hydrocarbon combustion radiation.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, the present invention provides an embodiment: a high-speed false alarm-proof three-infrared flame detector comprises an infrared sensor unit, an infrared signal frequency-selecting amplification unit, a processing unit and an output unit, wherein the infrared sensor unit comprises three infrared sensors, namely an infrared sensor 1, an infrared sensor 2 and an infrared sensor 3, the infrared signal frequency-selecting amplification unit comprises three frequency-selecting amplification circuits, the frequency-selecting amplification circuit comprises a resistor, a capacitor, an operational amplifier and a wiring terminal, the three frequency-selecting amplification circuits are connected through circuit board wiring, the processing unit comprises a processor, a crystal oscillator, a program downloading and debugging interface and a processor peripheral resistance-capacitance circuit, the output unit comprises 485/CAN output, current output, relay output and wireless alarm output, the detector CAN be wired-networked through the 485/CAN, the wireless networking CAN be realized through the wireless alarm, and the current output and the relay output of the detector CAN complete the driving among devices, the infrared sensor 1, the infrared sensor 2 and the infrared sensor 3 are respectively connected with three frequency-selecting amplifying circuits, the three frequency-selecting amplifying circuits are all connected with a processing unit, the processing unit is simultaneously connected with 485/CAN output, current output, relay output and wireless alarm output, an infrared flame detector CAN detect IN three infrared sensors with different wave bands during working, an interference light source is filtered through the three infrared wave bands, then an output signal of the infrared sensor passes through the frequency-selecting amplifying circuit, an effective signal enters a non-inverting input end of an operational amplifier U1A through an IN input end, the inverting input end of the operational amplifier U1A is connected with a resistor R7, the other end of a resistor R7 is grounded, a resistor R4 with filtering and feedback functions is connected with a capacitor C3 IN parallel, one end of the resistor R1A is connected with the inverting input end of the resistor R1, the other end of the resistor R A is connected with the output end of the capacitor C36, the other end of a capacitor C1 is connected with a resistor R1 and a non-inverting input end of an operational amplifier U1B, the other end of a resistor R1 is connected with a power supply VCC, the non-inverting input end of a U2B is connected with a resistor R9, the other end of a resistor R9 is grounded, one end of a resistor R5 and a capacitor C4 which are connected in parallel is connected with an inverting input end of a U2B, the other end of the resistor R8428 and a capacitor C4 is connected with an output end of a U2B, the output end of a U2B is connected with a capacitor C2, the other end of the capacitor C2 is connected with a resistor R2 and a non-inverting input end of the operational amplifier U2 2, the other end of the resistor R2 is connected with the power supply VCC, the non-inverting input end of the U2 2 is connected with a resistor R2, the other end of the resistor R2 is connected with the ground, the non-inverting input end of the capacitor C2 is connected with the output end of the U2 2, the, the data normalization processing is carried out by the processing unit, the sample values in the database are compared, the alarm signal is finally output, the relay output, the 485/CAN output, the current output and the wireless output are driven, and the related signal processing and the fire alarm algorithm judgment are all realized by software in the processing unit.
The detection waveband of the infrared sensor 1 is infrared radiation with a wavelength of 3.8um interference light source waveband, the detection waveband of the infrared sensor 2 is infrared radiation with a wavelength of 5.0um interference light source waveband, the detection waveband of the infrared sensor 3 is infrared radiation with a wavelength of 4.35um flame radiation waveband, because hydrocarbon substances such as natural gas alcohol, gasoline and the like can generate a large amount of CO2 gas when burning, the radiation intensity of the hot CO2 gas is maximum near 4.35um, infrared light at 4.35um in the spectrum of solar radiation almost does not exist due to the absorption of CO2 and water vapor on the ground surface, the infrared radiation generated by flame can be received to the maximum degree near 4.35um waveband, the frequency-selecting amplifying circuits corresponding to the three infrared sensors adopt the same circuit structure, the signal processing and screening time of the processing unit can be reduced, and the band-pass frequencies of the three frequency-selecting amplifying circuits are all 3 Hz-30 Hz, because the detection frequency of the flame is 3 Hz-30 Hz, the processor is a 16-bit high-performance processor, the 16-bit processor adopts MC9S12C128CFA of NXP company, the processor has strong functions, rich interfaces and high operation speed, and provides guarantee for the rapidity and the accuracy of fire judgment and analysis.
The working principle is as follows: three infrared sensors with different wave bands are selected for detection, and an interference light source is filtered through the three infrared wave bands, then the output signal of the infrared sensor is further filtered, amplified and frequency-selected by a frequency-selecting amplifying circuit, and the processed signal is sent to a processing unit, data processing is carried out in the processing unit, the data value of the sensor 3 and the data values of the sensor 1 and the sensor 2 are normalized according to the sample values in the database, meanwhile, the characteristic values of the flame and each interference source of the data are compared, when the flame characteristic condition is met, and (4) performing tightening screening, and finally directly outputting an alarm signal if the fire alarm value is met, driving relay output, 485/CAN output, current output and wireless output, wherein related signal processing analysis and fire alarm algorithm judgment are all realized by software in a processing unit.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (7)
1. The utility model provides a high-speed three infrared flame detectors of preventing wrong report, includes infrared sensor unit, infrared signal frequency-selecting amplification unit, processing unit and output unit, its characterized in that: the infrared sensor unit includes three infrared sensors, i.e., an infrared sensor 1, an infrared sensor 2, and an infrared sensor 3, the infrared signal frequency-selecting amplifying unit comprises three frequency-selecting amplifying circuits, each frequency-selecting amplifying circuit comprises a resistor, a capacitor, an operational amplifier and a wiring terminal, connected by circuit board wiring, the processing unit comprises a processor, a crystal oscillator, a program downloading and debugging interface and a processor peripheral resistance-capacitance circuit, the output unit comprises 485/CAN output, current output, relay output and wireless alarm output, the infrared sensor 1, the infrared sensor 2 and the infrared sensor 3 are respectively connected with three frequency-selecting amplifying circuits, the three frequency-selecting amplifying circuits are all connected with the processing unit, and the processing unit is simultaneously connected with the 485/CAN output, the current output, the relay output and the wireless alarm output.
2. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: the detection waveband of the infrared sensor 1 is infrared radiation with the wavelength of 3.8um interference light source waveband.
3. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: the detection wave band of the infrared sensor 2 is the infrared radiation of the interference light source wave band with the wavelength of 5.0 um.
4. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: the detection waveband of the infrared sensor 3 is infrared radiation of a flame radiation waveband with the wavelength of 4.35 um.
5. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: and the frequency-selective amplifying circuits corresponding to the three infrared sensors adopt the same circuit structure.
6. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: the band-pass frequencies in the three frequency-selecting amplifying circuits are all 3 Hz-30 Hz.
7. The high-speed false alarm prevention three-infrared flame detector according to claim 1, characterized in that: the processor is a 16-bit high performance processor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083103A (en) * | 2022-06-10 | 2022-09-20 | 西安中核核仪器股份有限公司 | Multi-band infrared pyroelectric flame detector based on deep learning and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083103A (en) * | 2022-06-10 | 2022-09-20 | 西安中核核仪器股份有限公司 | Multi-band infrared pyroelectric flame detector based on deep learning and detection method |
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