CN210865017U - Three-wavelength photoelectric smoke detector - Google Patents
Three-wavelength photoelectric smoke detector Download PDFInfo
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- CN210865017U CN210865017U CN202020129742.5U CN202020129742U CN210865017U CN 210865017 U CN210865017 U CN 210865017U CN 202020129742 U CN202020129742 U CN 202020129742U CN 210865017 U CN210865017 U CN 210865017U
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Abstract
The utility model discloses a three wavelength photoelectric smoke detector, it comprises circuit board, labyrinth body, labyrinth lid to be equipped with the photoelectric integration module that built-in blue light emitting diode, infrared luminotron and photodiode constitute, with photoelectric integration module is the side top at 45 degrees angles, still is provided with the third light emitting source of LED ruddiness, the transmission front end of third light emitting source is facing to photoelectric integration module. The light-emitting device with three wavelengths is integrated, the light-emitting time period, the length and the emission power of various light-emitting devices are reasonably controlled, the size and the possible types of the current smoke particles are judged, the accuracy of the detection result is effectively improved, and the probability of false alarm or missing report is reduced.
Description
Technical Field
The utility model relates to a fire-fighting equipment technical field especially relates to a three wavelength photoelectric smoke detector.
Background
In the prior art, in commercial and residential occasions, the installed smoke detectors are of ionization type and also of photoelectric type, and now the photoelectric type is gradually adopted to replace the more traditional ionization type, and the probability of occurrence of nuisance alarm is relatively lower.
The traditional photoelectric detection mode comprises photoelectric smoke detection of infrared ray opposite emission, and also comprises a conventional light emitting diode which is combined with a photodiode for receiving light, and the energy of scattered light is measured to judge whether the current smoke really exists and the size of the smoke. However, these detection methods have a drawback that, in a situation where a large amount of dust is present, the dust lifted up enters the smoke detection chamber, which also affects the detection result and causes false alarm. In some application scenarios, the false alarm rate is higher and is not easy to identify, for example, the false alarm rate cannot effectively identify steam generated by cooking or fog generated by weather reasons.
The photoelectric smoke sensor in the prior art also adopts a light source with two wavelengths as a light emitting device, and then arranges a light receiving device for receiving, or integrates the two light emitting devices and the light receiving device into one component or a chip. The anti-interference capability can be improved to a certain extent, and partial interference sources can be identified, so that the probability of missing report or false report is reduced. However, in the detection process of smoke and aerosol, the identification capability of the small-particle smoke type is still insufficient, and the influence of ambient light on the detection result is still large.
The emphasis on improving smoke detection capability is on identifying and classifying smoke particle types, identifying the presence of effective, real smoke, and eliminating the interference of various interference sources. However, in the prior art, the unavoidable false alarm of the smoke sensor or the smoke detector interferes with the daily normal life and working process, is one of the important reasons that the smoke sensor or the smoke detector is not accepted by the market and even is directly removed or not used, and when a fire occurs, the smoke detector does not work or fails to report, which is also one of the reasons causing great loss.
In chinese patent No. 201410613283.7, a dual-light-path smoke detection smoke chamber for fire hazard is disclosed, including the optical measurement chamber, the optical measurement chamber is formed by the mutual lock of base and upper cover, the base includes circular bottom plate, the buckle that is used for fixed upper cover and is used for placing two infrared light emitters and an infrared light receiver's three light seat respectively. The utility model discloses a realize through setting up two infrared light emitters and an infrared light receiver, its single wavelength detection mode can not be to the effective discernment and the classification of smog granule type equally, can not solve how to improve the problem of smog detectability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses make the improvement to above-mentioned technical problem, promptly the utility model aims to solve the technical problem that a photoelectric smoke detector who has integrated three kinds of wavelength luminescent device is provided, including blue light, infrared light and LED ruddiness or infrared IR pipe, through the light emitting source that uses different wavelengths, acquire the luminous power change of photic device feedback, can effectively improve the accuracy of testing result, reduce the probability that missing report or wrong report take place.
In order to solve the above technical problem, the utility model discloses a technical scheme is:
a three-wavelength photoelectric smoke detector is characterized by comprising a sensor body consisting of a labyrinth body and a labyrinth cover, wherein a circuit board with an intelligent control module is arranged at the bottom of the labyrinth body, a smoke detection chamber is arranged in the middle of the sensor body, and a photoelectric integrated module is arranged in the central area of the circuit board;
and a light-emitting tube suite is arranged on one side of the smoke detection chamber and used for mounting light-emitting tubes in a nested manner, and the horizontal plane of the tops of the light-emitting tubes is positioned above the horizontal plane of the photoelectric integrated module.
Furthermore, a first light emitting source, a second light emitting source and a light receiver are arranged in the photoelectric integrated module, and the light emitting tube is a third light emitting source.
Further, the light receiver includes one or two light sensors.
Furthermore, the luminous tube is an infrared IR tube or an LED lamp, and the luminous tube and the horizontal line form an angle of 45 degrees.
Further, the emission front end of the luminous tube is opposite to the photoelectric integrated module.
Furthermore, a reverse-bucket-shaped reflecting portion is arranged in the smoke detection chamber, and the light-emitting tube suite is arranged on the oblique edge at the lower end of one side of the reverse-bucket-shaped reflecting portion.
Further, the sensor body is provided with a light guide column external member, and the tail end of the light guide column external member is connected with an indicator lamp and a key.
Further, a horn sleeve is arranged in the labyrinth cover.
Further, the first light-emitting source is a blue light-emitting tube, and the second light-emitting source is an infrared light-emitting tube.
Further, the smoke sensor is provided with a constant current source device, and the constant current source device is connected with the luminous tube.
Furthermore, an intelligent control board is arranged on the circuit board and at least comprises an ADC device and an MCU device.
Compared with the prior art, the utility model discloses following beneficial effect has:
the photoelectric smoke sensor integrates three wavelength light emitting devices, comprises a blue light source, an infrared light source and an LED red light or infrared IR tube, and can judge the authenticity, the size or the possible type of particles of the current smoke by using light emitting sources with different wavelengths, combining the change size and the speed of the light power fed back by a light receiving device and comparing the change size and the speed with prestored experimental data to exceed an alarm range, so that the accuracy of a detection result is effectively improved, and the probability of missing report or false report is reduced.
Drawings
Fig. 1 is an exploded schematic view of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 2 is a schematic structural anatomical diagram of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of a light emitting tube kit of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of a bottom of a labyrinth of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 5 is a schematic diagram showing an inverted three-dimensional structure of a labyrinth of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 6 is a schematic perspective view of a labyrinth cover of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
Fig. 7 is a simplified schematic diagram of an arrangement of three light source positions of a three-wavelength photoelectric smoke detector according to an embodiment of the present invention.
In fig. 1: 10-circuit board, 101-photoelectric integrated module, 20-labyrinth body, 30-light-emitting tube suite, 301-light-emitting tube, 40-labyrinth cover, 401-light guide column suite and 402-horn suite.
In fig. 2: 10-a circuit board, 101-a photoelectric integrated module, 102-a key, 20-a labyrinth body, 201-a smoke detection chamber, 202-a labyrinth part, 301-a light-emitting tube, 40-a labyrinth cover, 401-a light guide column kit, 402-a loudspeaker kit and 403-a reverse-bucket-shaped light reflecting part.
In fig. 3: 30-a luminous tube kit, 301-a luminous tube and 302-a luminous tube hole.
In fig. 4: 201-smoke detection chamber, 101-optoelectronic integration module.
In fig. 5: 20-maze body.
In fig. 6: 40-labyrinth cover, 401-light guide column set and 402-horn set.
In fig. 7: 30-a light emitting tube kit, 101-a photoelectric integrated module and 101-a photoelectric integrated module.
Detailed Description
The drawings that accompany the detailed description can be briefly described as follows, and it is obvious that the described embodiments are some of the embodiments of the present invention, and some embodiments of the present invention can be derived from the drawings without creative efforts for those skilled in the art.
It is to be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" in the description of the invention are to be construed broadly, and may for example be integrally connected, fixedly connected, or detachably connected; either directly, mechanically or electronically, or indirectly through intervening media.
In the description of the present invention, "a plurality" or "a plurality" means two or more unless otherwise explicitly defined in the present embodiment.
The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The following disclosure provides different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific embodiments are described below.
Fig. 1 is an anatomical schematic of fig. 6 at location a-a.
As shown in fig. 1, the three-wavelength photoelectric smoke detector includes a sensor body composed of a circuit board 10, a labyrinth body 20, and a labyrinth cover 40, wherein the circuit board 10 is disposed at the bottom of the labyrinth body 20, and a central region of the circuit board 10 is provided with a photoelectric integrated module 101.
As shown in fig. 2, a smoke detection chamber 201 is disposed in the middle of the sensor body, a light emitting tube kit 30 is disposed on one side of the smoke detection chamber 201, and the light emitting tube kit 30 is used for nesting and installing a light emitting tube 301.
In the present embodiment, the external smoke enters the smoke detection chamber 201 under the guidance of the labyrinth 202, and is collected below the optoelectronic integration module 101.
The photoelectric integrated module 101 is internally provided with a first light emitting source, a second light emitting source and a light receiver, the light emitting tube 301 is a third light emitting source, and the light receiver comprises one or two light sensors, and the light sensors are preferably photodiodes. In this embodiment, the first light emitting source, the second light emitting source and the third light emitting source emit light at different time intervals, and after the light is reflected and scattered by smoke or a built-in reflector, the light receiver receives a certain degree of light and outputs photocurrent, which is determined by the light emitting power, the light emitting power and whether there are different types of smoke in the smoke detection chamber 201.
In this embodiment, a reverse-bucket-shaped reflecting portion 403 is provided in the smoke detection chamber 201, the light emitting tube kit 30 is provided on an oblique edge at the lower end of one side of the reverse-bucket-shaped reflecting portion 403, the light emitting tube 301 forms an angle of 45 degrees with the horizontal line, and the emission front end of the light emitting tube 301 faces the optoelectronic integration module 101.
Preferably, the light emitting tube 301 is an LED red light. In this embodiment, the smoke sensor is provided with a constant current source device, the constant current source device is connected to the light emitting tube 301, and the constant current source device controls the light emitting tube 301 to output different light emitting intensities by controlling the magnitude and time of the current output by the constant current source device, so as to correspondingly adjust the light power (mW) emitted by the light emitting tube 301 in different application scenes.
Referring to fig. 1 and 2, and fig. 6, the sensor body is provided with a light guide bar set 401, and the tail end of the light guide bar set 401 is connected with the indicator light and the key 102. The light guide column set 401 comprises a transparent column, and when the indicator light is turned on, light penetrates through the transparent column for prompting. The key 102 disposed at the rear end of the light guide bar set 401 is configured to be pressed against the key 102 by pressure conduction of the transparent bar when the light guide bar set 401 is pressed.
In the present embodiment, a horn set 402 is disposed in the labyrinth cover 40, and the horn set 402 is used for alarm indication. As shown in fig. 2, the horn sleeve 402 is nested in the hollow portion below the inverted funnel-shaped light reflecting portion 403, and when a warning signal is generated, the generated acoustic frequency vibration may cause partial structure oscillation or resonance, which may play a role in shaking off dust.
In this embodiment, the first light-emitting source is a blue light-emitting tube, the second light-emitting source is an infrared light-emitting tube, and the third light-emitting source is an infrared IR tube or a red light-emitting tube, preferably a high-brightness LED light-emitting diode.
In this embodiment, the circuit board 10 is disposed with an intelligent control board, and at least includes an ADC device and an MCU device.
In practical use, as long as the light emitting time periods, the lengths and the emitting powers of various light emitting devices are reasonably controlled, the light power of the light receiving device under different conditions is recorded, the Power Transmission Ratio (PTR) of the light receiving device is fed back, the change range and the rising speed of the Power Transmission Ratio (PTR) of the light receiving device are combined in different light emitting combination modes, and when the light receiving device is compared with a prestored experimental data table, the approximate size and the possible types of the current smoke particles can be judged, so that the accuracy of a smoke detection result is effectively improved.
A three wavelength photoelectric smoke detector, through the luminescent device who integrates three kinds of wavelength, integrated three kinds of wavelength luminescent device's photoelectric smoke transducer, including blue light, infrared light and LED ruddiness or infrared IR pipe, through the light emitting source that uses different wavelength, effectively reduce the probability that the sensor missed report or wrong report takes place.
The above description is only for the purpose of illustrating the technical concept and features of the present invention, and the purpose of the present invention is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, but not to limit the protection scope of the present invention. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A three-wavelength photoelectric smoke detector is characterized by comprising a sensor body consisting of a labyrinth body (20) and a labyrinth cover (40), wherein a circuit board (10) with an intelligent control module is arranged at the bottom of the labyrinth body (20), a smoke detection chamber (201) is arranged in the middle of the sensor body,
a photoelectric integrated module (101) is arranged in the central area of the circuit board (10);
a light-emitting tube suite (30) is arranged on one side of the smoke detection chamber (201), the light-emitting tube suite (30) is used for mounting a light-emitting tube (301) in a nested mode, and the horizontal plane of the top of the light-emitting tube (301) is located above the horizontal plane of the photoelectric integrated module (101);
the photoelectric integrated module (101) is internally provided with a first light-emitting source, a second light-emitting source and a light receiver, and the light-emitting tube (301) is a third light-emitting source.
2. A three wavelength photoelectric smoke detector according to claim 1, wherein said light receptor comprises one or two light sensors.
3. A three wavelength photoelectric smoke detector according to claim 1, wherein said light emitting tube (301) is an infrared IR tube or LED lamp, said light emitting tube (301) being at an angle of 45 degrees to the horizontal.
4. A three wavelength photoelectric smoke detector according to claim 1, wherein the emitting front end of said light emitting tube (301) is facing said optoelectronic integration module (101).
5. A three wavelength photoelectric smoke detector according to claim 1, wherein said smoke detection chamber (201) is provided with a reflective portion (403) having a shape of a reversed funnel, and said light emitting tube assembly (30) is provided on an oblique edge of a lower end of one side of said reflective portion (403) having a shape of a reversed funnel.
6. A three wavelength photoelectric smoke detector according to claim 1, wherein said sensor body is provided with a light guide sleeve (401), and said light guide sleeve (401) is connected with an indicator light and a key (102) at the tail end.
7. A three wavelength photoelectric smoke detector according to claim 1, wherein a horn kit (402) is provided in said labyrinth cover (40).
8. A three wavelength photoelectric smoke detector according to claim 1, wherein said first light source is a blue light emitting tube and said second light source is an infrared light emitting tube.
9. A three wavelength photoelectric smoke detector according to claim 1, wherein said smoke sensor is provided with a constant current source device connected to said light emitting tube (301).
10. A three wavelength photoelectric smoke detector according to claim 1, wherein said circuit board (10) is arranged with an intelligent control board and comprises at least ADC device and MCU device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020129742.5U CN210865017U (en) | 2020-01-20 | 2020-01-20 | Three-wavelength photoelectric smoke detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020129742.5U CN210865017U (en) | 2020-01-20 | 2020-01-20 | Three-wavelength photoelectric smoke detector |
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| CN210865017U true CN210865017U (en) | 2020-06-26 |
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| CN202020129742.5U Active CN210865017U (en) | 2020-01-20 | 2020-01-20 | Three-wavelength photoelectric smoke detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179540A (en) * | 2020-01-20 | 2020-05-19 | 上海中环科仪消防报警设备有限公司 | Three-wavelength photoelectric smoke detection method and sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179540A (en) * | 2020-01-20 | 2020-05-19 | 上海中环科仪消防报警设备有限公司 | Three-wavelength photoelectric smoke detection method and sensor |
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Address after: 315700 Li Kaokeng Village, Daxu Town, Xiangshan County, Ningbo City, Zhejiang Province (factory building in the industrial zone) Patentee after: Zhejiang Zhonghuan Keyi fire alarm equipment Co.,Ltd. Address before: 201612 North workshop, 2nd floor, Building 2, No. 168, Xutang Road, Songjiang District, Shanghai Patentee before: Shanghai Zhonghuan Keyi fire alarm equipment Co.,Ltd. |