WO2022016716A1 - Multi-light-source optical dark chamber - Google Patents

Multi-light-source optical dark chamber Download PDF

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Publication number
WO2022016716A1
WO2022016716A1 PCT/CN2020/123462 CN2020123462W WO2022016716A1 WO 2022016716 A1 WO2022016716 A1 WO 2022016716A1 CN 2020123462 W CN2020123462 W CN 2020123462W WO 2022016716 A1 WO2022016716 A1 WO 2022016716A1
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WO
WIPO (PCT)
Prior art keywords
optical signal
light
optical
darkroom
emitting device
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PCT/CN2020/123462
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French (fr)
Chinese (zh)
Inventor
何祥新
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九江珀伽索斯科技有限公司
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Publication of WO2022016716A1 publication Critical patent/WO2022016716A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0291—Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
    • G01J3/4412—Scattering spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G01J2003/102—Plural sources
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/075—Investigating concentration of particle suspensions by optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0106—General arrangement of respective parts
    • G01N2021/0112—Apparatus in one mechanical, optical or electronic block

Definitions

  • the invention relates to the technical field of fire detection and alarm, and more particularly, to a multi-light source optical darkroom.
  • Optical sensor is the core device of photoelectric smoke and fire detector. It is an optical light signal sensor device that responds to tiny solid or liquid smoke particles generated by combustion or pyrolysis through the principle of light scattering and refraction.
  • the smoke produced by common combustion materials can be divided into black smoke and white smoke according to the difference in the refractive index of the smoke particles to the incident light. Due to the absorption effect of black smoke particles on light, the scattered light intensity of black smoke particles of the same concentration is much lower than that of white smoke particles. As a result, the response of traditional photoelectric smoke detectors to the same concentration of black smoke and white smoke will be very different. Furthermore, after the light is scattered by the smoke particles, the light intensity of the scattered light at different angles is different. Therefore, there is a technical loophole in using a single fire detection principle with the detected smoke concentration as the alarm threshold. There may be a problem that the detector alarm cannot be triggered even when the black smoke concentration is very high.
  • the invention provides a multi-light source optical darkroom, which can detect a wider spectrum by setting a multi-light source sensor, and thus can identify particles with more particle diameters.
  • a multi-light source optical darkroom is characterized in that it includes a dust-proof and insect-proof net, an optical darkroom, a circuit board and an optical signal sensor, the optical signal sensor is mounted on the circuit board, and the optical signal sensor includes a backward optical signal emitting device, A first forward optical signal transmitting device, an optical signal receiving device and a second forward optical signal transmitting device, the backward optical signal transmitting device, the first forward optical signal transmitting device, the optical signal receiving device and the second forward optical signal transmitting device One end of the optical signal emitting device is installed on the circuit board, and the other end is installed on the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder, the optical signal receiving device fixing cylinder and the second forward direction respectively.
  • the fixed cylinder of the optical signal emitting device In the fixed cylinder of the optical signal emitting device,
  • the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder, the optical signal receiving device fixing cylinder and the second forward optical signal emitting device fixing cylinder are all cylindrical. It is a variable diameter cylinder, and the axis lines of the light exit holes of the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder and the second forward optical signal emitting device fixing cylinder are related to the optical signal receiving cylinder.
  • the axis lines of the light inlet holes of the device fixing barrel intersect at one point, and the intersection point is on the axis line of the optical darkroom and is far away from the bottom surface of the optical darkroom.
  • an acute angle of 60°-80° is formed between the rearward optical signal emitting device fixing cylinder and the optical signal receiving device fixing cylinder, and the first forward optical signal emitting device is fixed
  • the angle between the barrel and the second forward optical signal emitting device fixing barrel and the optical signal receiving device fixing barrel is an obtuse angle of 120°-130°.
  • the optical darkroom includes a bottom mounting plate, and a guide shading grating is uniformly arrayed around the inner side of the bottom mounting board, and the guide shading grating is based on the optical signal sensor.
  • a center-axis rotating array is distributed around the optical signal sensor.
  • the diversion louver is composed of a curved louver and a straight louver, the height of the curved louver is lower than the height of the straight louver, and the curved louver is The height of plus the height of the fence is equal to the height of the dust and insect net.
  • both ends of the curved louver and the straight louver are provided with tip portions.
  • the guide shutter is provided with a light-shielding channel, and the light-shielding channel is formed by the cooperation of a first shutter and a second shutter.
  • the grating adopts the design of wide bottom and narrow top.
  • the first louver includes a first curved louver and a first straight louver
  • the second louver includes a second curved louver and a second straight louver .
  • the first straight louver is composed of a first outer straight louver and a first inner straight louver
  • the second straight louver is composed of a second outer straight louver It is composed of a second inner straight shading grating, and the angle between the first outer straight shading grating and the first inner straight shading grating is 120°-130°.
  • the horizontal included angle between the first outer straight louver and the second outer straight louver is 8°-10°
  • the first inner straight louver and the second inner louver are The horizontal included angle of the straight-faced louver is 8°-10°.
  • the width of one end of the first inner straight shading grating and the second inner straight shading grating close to the optical signal sensor is 2mm-3mm
  • the width of one end of the two inner straight-face shading gratings away from the optical signal sensor is 2mm-4mm.
  • the first curved louvers and the second curved louvers are respectively connected with the first straight plane louvers and the second straight plane louvers, and the first curved louvers
  • the width of the inlet channel and the second curved louver is 2mm-3mm, and the width of the outlet channel is 2mm-4mm.
  • the dust-proof and insect-proof net is composed of transverse grid bars and vertical grid bars, and a plurality of smoke inlet mesh holes are formed between the transverse grid bars and the vertical grid bars.
  • the side length of the smoke mesh is less than 1mm.
  • the cross-sections of the transverse grid bars and the vertical grid bars are both isosceles trapezoids, and a plurality of vertical trapezoidal slots are formed between the plurality of vertical grid bars.
  • a dust trap area is also designed on the bottom surface of the dust-proof and insect-proof net.
  • the dust trap area is circular, and the dust trap is formed by arranging and combining a plurality of conical protrusions.
  • a surrounding wall is also provided around the inner bottom surface of the dust-proof and insect-proof net.
  • the inner surface of the enclosure wall is designed with zigzag convexes and concaves with an included angle of 60°.
  • a partitioned facade is provided on the outer side of the enclosure wall, and the partitioned facade includes 8 flow guide grids, and the flow guide grid divides the partitioned facade into 8 regions , and the partition elevation is an arc surface.
  • the guide grid includes a trapezoidal end portion, and the cross-sectional size of the trapezoidal end portion is the same as that of the vertical trapezoidal notch.
  • the dust-proof and insect-proof net and the optical darkroom are respectively provided with male buckles and female buckles, and the dust-proof and insect-proof net is installed on the optical darkroom through a buckle structure.
  • Multiple light sources can detect a wider spectrum, and then can identify particles with more particle sizes, and then determine whether the particles are generated by combustion or pyrolysis or suspended in the air, such as dust, water vapor, or food oil during cooking
  • the generated oil fume can effectively reduce the false alarm rate of the sensor.
  • the position of the fixed cylinder of the optical signal transmitting and receiving device is designed so that the intersection of the four axes intersect with the same point, and it is on the central axis of the darkroom. Smoke particles from any direction can diffuse to the detection area at the same speed. This ensures the consistency of the azimuth sensitivity of the optical darkroom to the smoke.
  • the design of the dust-proof and insect-proof net can effectively prevent the entry of large particles of dust and insects.
  • the traps set for the entering dust prevent the dust from affecting the sensitivity of the sensor, and the convergence of the airflow increases the sensitivity of the sensor to the smoke response. sex.
  • Fig. 1 is the structural schematic diagram of this multi-light source optical darkroom of the present invention
  • Fig. 2 is the cross-sectional structure schematic diagram of Fig. 1;
  • FIG. 3 is a schematic structural diagram of the optical sensor and the optical darkroom in FIG. 1, omitting the circuit board;
  • FIG. 4 is a schematic diagram of the structure in one direction of FIG. 3 , mainly showing the structure of the guide shutter;
  • FIG. 5 is a schematic view of the structure in another direction of FIG. 4, showing the air intake direction;
  • FIG. 6 is a schematic structural diagram of the first guide shading grating and the second guide shading grating in FIG. 5;
  • Fig. 7 is the dust-proof and insect-proof net structure schematic diagram in Fig. 1;
  • Fig. 8 is a schematic diagram of a direction of Fig. 7;
  • Fig. 9 is another direction schematic diagram of Fig. 7;
  • Fig. 10 is the enlarged schematic diagram of A part of Fig. 9;
  • FIG. 11 is a cross-sectional view taken along the line A-A of FIG. 8;
  • FIG. 12 is a cross-sectional view taken along the line B-B in FIG. 8 .
  • the multi-light source optical darkroom of the present invention as shown in Fig. 1 to Fig. 12 includes a dust and insect proof net 10, an optical darkroom 20, a circuit board 30 and a light signal sensor.
  • the light signal sensor is installed on the circuit board 30, and the light signal
  • the sensor includes a backward optical signal emitting device 41 , a first forward optical signal emitting device 42 , an optical signal receiving device 43 and a second forward optical signal emitting device 44 .
  • One end of the backward optical signal transmitting device 41, the first forward optical signal transmitting device 42, the optical signal receiving device 43 and the second forward optical signal transmitting device 44 are mounted on the circuit board 30, and the other ends are respectively mounted on the backward light.
  • the signal emitting device fixing cylinder 45 , the first forward optical signal emitting device fixing cylinder 46 , the optical signal receiving device fixing cylinder 47 and the second forward optical signal emitting device fixing cylinder 48 are inside.
  • the rearward optical signal emitting device fixing cylinder 45, the first forward optical signal emitting device fixing cylinder 46, the optical signal receiving device fixing cylinder 47 and the second forward optical signal emitting device fixing cylinder 48 are all cylindrical.
  • the cylindrical cylinder is a variable diameter cylinder, and the diameter of the light exit hole of the variable diameter cylinder is between 3mm and 4mm.
  • the axis line of the light exit hole of the signal emitting device fixing cylinder 47 and the axis line of the light entrance hole of the light signal receiving device fixing cylinder 48 intersect at one point, and the intersection point is on the axis line of the optical darkroom 20 and away from the bottom surface of the optical darkroom 20 .
  • the detection area of the three optical signal sensors can be the same area, so that the smoke particles from any direction can spread to the detection area at the same speed. This further ensures the consistency of the azimuth sensitivity of the optical darkroom 20 to the smoke.
  • the angle between the rearward optical signal emitting device fixing tube 45 and the optical signal receiving device fixing tube 47 is an obtuse angle of 126°, which belongs to the principle of forward refracted light.
  • the optical darkroom 20 includes a bottom mounting plate 21.
  • the inner side of the bottom mounting plate 21 is provided with a diversion shading grating 22, and a rotating array of the diversion shading grating 22 is distributed around the optical signal sensor with the center of the optical signal sensor as the axis.
  • the guide shutter 22 is composed of a curved shutter 221 and a straight shutter 222.
  • the height of the curved shutter 221 is lower than the height of the straight shutter 222.
  • the height of the curved shutter 221 plus the height of the enclosure wall 50 is equal to the dust and insect proof net 10.
  • Both ends of the curved shading grating 221 and the straight shading grating 222 are provided with tip portions 224.
  • the tip portions 224 can reduce the obstruction to the airflow, so that the smoke particles can quickly enter the labyrinth and improve the sensitivity of the optical signal sensor.
  • the guide shading grating 22 is provided with a light shading channel, and the light shading channel is formed by the cooperation of the first shading grating 23 and the second shading grating 24 , both of which are designed with a wide bottom and a narrow top.
  • the shutter reduces the obstruction to the air flow, making it easier for the air to float in or out, so that the light signal sensor can more easily detect the changes in the surrounding smoke, so that the light signal sensor responds more easily. Sensitive; at the same time, the easy flow of smoke makes the optical signal sensor reduce the false alarm caused by people smoking in the detection space.
  • the first shutter 23 includes a first curved shutter 231 and a first straight shutter 232
  • the second shutter 24 includes a second curved shutter 241 and a second straight shutter 242
  • the first straight shutter 232 It consists of a first outer straight shading plate 233 and a first inner straight shading plate 234.
  • the second straight shading plate 242 consists of a second outer straight shading plate 243 and a second inner straight shading plate 244.
  • the first outer straight shading plate 233 and The angle of the first inner straight shading barrier 234 is 125°, wherein the horizontal angle between the first outer straight shading barrier 233 and the second outer straight shading barrier 243 is 10°, and the first inner straight shading barrier 234 and the second inner straight shading barrier 234 are The horizontal included angle of the shutter grating 244 is 10°.
  • the width of one end of the first inner straight shading grating 234 and the second inner straight shading grating 244 close to the optical signal sensor is 3 mm, and the width of one end of the first inner straight shading grating 234 and the second inner straight shading grating 244 away from the optical signal sensor is 3 mm. is 4mm.
  • the first curved louvers 231 and the second curved louvers 241 are respectively connected with the first straight louvers 232 and the second straight louvers 242 , and the width of the entrance channel between the first curved louvers 231 and the second curved louvers 241 is 3mm, and the outlet channel width is 4mm.
  • the shading channel adopts a "crescent shape" design with two narrow and middle wide sections, which can prevent most of the external light from entering the optical darkroom. Even if it can pass through the shading channel, most of the light is continuously reflected and scattered in the middle area of the shading channel and weakened. Effectively avoid the interference of external light on the optical darkroom.
  • the above spacing density of the guide shading gratings 22 can not only ensure that the light emitted from the outside cannot enter the dark room, but also can reduce the number of the guide shading gratings 22 to a certain extent and reduce the manufacturing cost.
  • the smoke and dust can enter the optical darkroom smoothly, which improves the detection sensitivity of the optical signal sensor.
  • the dust-proof and insect-proof net 10 is composed of horizontal grid bars 101 and vertical grid bars 102.
  • a plurality of smoke inlet mesh holes 106 are formed between the horizontal grid bars 101 and the vertical grid bars 102, and the side length of the smoke inlet mesh holes 106 is smaller than 1mm, to ensure that smoke particles can enter while preventing 1mm of insects from entering.
  • the cross-sections of the horizontal grid bars 101 and the vertical grid bars 102 are both isosceles trapezoids, which effectively reduce the obstruction to the entry or escape of smoke particles inside and outside, and prevent false alarms.
  • a plurality of vertical trapezoidal notches 103 are formed between the plurality of vertical grid bars 102 .
  • the bottom surface of the dust-proof and insect-proof net 10 is also designed with a dust trap area 104 .
  • the dust trap area 104 is circular, and the dust trap 104 is formed by arranging and combining a plurality of conical protrusions 105 . After the dust entering the optical darkroom 20 settles naturally, the dust falls into the root of the conical protrusion 105, which is an area that cannot be irradiated by the emitted light, and belongs to a dust trap, so it will not be affected by the scattering of the emitted light by the dust. The received signal changes, this design improves the anti-dust pollution ability of the optical signal sensor.
  • the inner surface of the enclosure wall 50 is designed with sawtooth-shaped protrusions and depressions 51 with an included angle of 60°, so that the light emitted from the optical signal emitting device is reflected multiple times in the groove and absorbed.
  • the outer side of the enclosure wall 50 is provided with a partitioned facade 52, and the partitioned facade 52 includes 8 guide grids 53.
  • the guide grids 53 divide the partitioned facade 52 into 8 areas, and the partitioned facade 52 is an arc surface, which further reduces the smoke in the smoke.
  • the obstruction of the air inlet or outlet which can condense the air flow, avoid the air flow from the outside of the wall, and increase the sensitivity of the light signal sensor to the smoke response.
  • the guide grille 53 includes a trapezoidal end portion 531.
  • the cross-sectional size of the trapezoidal end portion 531 is the same as the cross-sectional size of the vertical trapezoidal slot 103. In the dust and insect net 10, the installation and disassembly are convenient.
  • the dust-proof and insect-proof net 10 and the optical darkroom 20 are respectively provided with a male buckle 105 and a female buckle 201, and the dust-proof and insect-proof net 10 is installed on the optical darkroom through a buckle structure, which is convenient for disassembly and installation, especially convenient for regular anti-proofing.
  • the dust in the dust and insect net 10 is cleaned to ensure the sensitivity of the optical signal sensor.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

A multi-light-source optical dark chamber, comprising a dustproof and insect-proof net (10), an optical dark chamber (20), a circuit board (30) and an optical signal sensor, wherein the optical signal sensor is arranged on the circuit board (30) and comprises a backward optical signal transmitting device (41), a first forward optical signal transmitting device (42), an optical signal receiving device (43) and a second forward optical signal transmitting device (44); and the backward optical signal transmitting device (41), the first forward optical signal transmitting device (42), the optical signal receiving device (43) and the second forward optical signal transmitting device (44) are respectively mounted in a backward optical signal transmitting device fixing tube (45), a first forward optical signal transmitting device fixing tube (46), an optical signal receiving device fixing tube (47) and a second forward optical signal transmitting device fixing tube (48). The optical dark chamber can detect a wider spectrum and can then identify particles with more particle sizes, and can thus determine whether the particles are those generated by combustion or pyrolysis, or are dust and water vapor suspended in the air, or are oil fumes generated by food oil during cooking, thereby effectively reducing the false alarm rate of a sensor.

Description

一种多光源光学暗室A multi-light source optical darkroom 技术领域technical field
本发明涉及消防火灾探测及报警技术领域，更具体的说，涉及一种多光源光学暗室。The invention relates to the technical field of fire detection and alarm, and more particularly, to a multi-light source optical darkroom.
背景技术Background technique
光学传感器是光电感烟火灾探测器最核心的器件，是通过光的散射、折射原理，来响应燃烧或热解产生的微小固体或液体烟雾粒子的光学光信号传感器件。而一般常见燃烧物产生的烟雾可根据烟雾粒子对入射光的折射率的差异，划分为黑烟和白烟两类。由于黑色的烟雾粒子对光线的吸收效应，导致同种浓度的黑烟粒子的散射光强远低于白烟粒子的散射光强。进而导致传统光电式感烟火灾探测器对同等浓度的黑烟和白烟的响应会有很大差异。再者，光线经过烟粒子的散射后，其各个角度散射光的光强是不同的，因此通过采用单一的以探测到的烟雾浓度作为报警阈值的火灾探测原理是存在技术漏洞的。可能会出现黑烟浓度很高时依然不能触发探测器报警的问题。Optical sensor is the core device of photoelectric smoke and fire detector. It is an optical light signal sensor device that responds to tiny solid or liquid smoke particles generated by combustion or pyrolysis through the principle of light scattering and refraction. The smoke produced by common combustion materials can be divided into black smoke and white smoke according to the difference in the refractive index of the smoke particles to the incident light. Due to the absorption effect of black smoke particles on light, the scattered light intensity of black smoke particles of the same concentration is much lower than that of white smoke particles. As a result, the response of traditional photoelectric smoke detectors to the same concentration of black smoke and white smoke will be very different. Furthermore, after the light is scattered by the smoke particles, the light intensity of the scattered light at different angles is different. Therefore, there is a technical loophole in using a single fire detection principle with the detected smoke concentration as the alarm threshold. There may be a problem that the detector alarm cannot be triggered even when the black smoke concentration is very high.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种多光源光学暗室，其通过设置多光源传感器，可探测更广的光谱，进而可识别更多粒径的粒子。The invention provides a multi-light source optical darkroom, which can detect a wider spectrum by setting a multi-light source sensor, and thus can identify particles with more particle diameters.
本发明的技术方案是这样实现的：The technical scheme of the present invention is realized as follows:
一种多光源光学暗室，其特征在于，包括防尘防虫网、光学暗室、电路板和光信号传感器，所述光信号传感器安装在电路板上，所述光信号传感器包括后向光信号发射器件、第一前向光信号发射器件、光信号接收器件和第二前向光信号发射器件，所述后向光信号发射器件、第一前向光信号发射器件、光信号 接收器件和第二前向光信号发射器件的一端安装在所述电路板上，另一端分别安装在后向光信号发射器件固定筒、第一前向光信号发射器件固定筒、光信号接收器件固定筒和第二前向光信号发射器件固定筒内，A multi-light source optical darkroom is characterized in that it includes a dust-proof and insect-proof net, an optical darkroom, a circuit board and an optical signal sensor, the optical signal sensor is mounted on the circuit board, and the optical signal sensor includes a backward optical signal emitting device, A first forward optical signal transmitting device, an optical signal receiving device and a second forward optical signal transmitting device, the backward optical signal transmitting device, the first forward optical signal transmitting device, the optical signal receiving device and the second forward optical signal transmitting device One end of the optical signal emitting device is installed on the circuit board, and the other end is installed on the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder, the optical signal receiving device fixing cylinder and the second forward direction respectively. In the fixed cylinder of the optical signal emitting device,
其中，所述后向光信号发射器件固定筒、第一前向光信号发射器件固定筒、光信号接收器件固定筒和第二前向光信号发射器件固定筒均为圆柱筒形，该圆柱筒为变径圆筒，所述后向光信号发射器件固定筒、第一前向光信号发射器件固定筒和第二前向光信号发射器件固定筒的出光孔轴心线与所述光信号接收器件固定筒的进光孔轴心线相交于一点，且交点在光学暗室的轴心线上，并远离所述光学暗室的底面。Wherein, the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder, the optical signal receiving device fixing cylinder and the second forward optical signal emitting device fixing cylinder are all cylindrical. It is a variable diameter cylinder, and the axis lines of the light exit holes of the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder and the second forward optical signal emitting device fixing cylinder are related to the optical signal receiving cylinder. The axis lines of the light inlet holes of the device fixing barrel intersect at one point, and the intersection point is on the axis line of the optical darkroom and is far away from the bottom surface of the optical darkroom.
在本发明的这种多光源光学暗室中，所述后向光信号发射器件固定筒和光信号接收器件固定筒之间为60°-80°的锐角，所述第一前向光信号发射器件固定筒和第二前向光信号发射器件固定筒与光信号接收器件固定筒之间的角度为120°-130°的钝角。In the multi-light source optical darkroom of the present invention, an acute angle of 60°-80° is formed between the rearward optical signal emitting device fixing cylinder and the optical signal receiving device fixing cylinder, and the first forward optical signal emitting device is fixed The angle between the barrel and the second forward optical signal emitting device fixing barrel and the optical signal receiving device fixing barrel is an obtuse angle of 120°-130°.
在本发明的这种多光源光学暗室中，所述光学暗室包括底部安装板，所述底部安装板的内侧周围均匀阵列有导流遮光栅，所述导流遮光栅的以所述光信号传感器中心为轴线旋转阵列分布在所述光信号传感器的周围。In the multi-light source optical darkroom of the present invention, the optical darkroom includes a bottom mounting plate, and a guide shading grating is uniformly arrayed around the inner side of the bottom mounting board, and the guide shading grating is based on the optical signal sensor. A center-axis rotating array is distributed around the optical signal sensor.
在本发明的这种多光源光学暗室中，所述导流遮光栅由曲面遮光栅和直面遮光栅组成，所述曲面遮光栅的高度低于所述直面遮光栅的高度，所述曲面遮光栅的高度加上所述围墙的高度等于所述防尘防虫网的高度。In the multi-light source optical darkroom of the present invention, the diversion louver is composed of a curved louver and a straight louver, the height of the curved louver is lower than the height of the straight louver, and the curved louver is The height of plus the height of the fence is equal to the height of the dust and insect net.
在本发明的这种多光源光学暗室中，所述曲面遮光栅和直面遮光栅的两端均设有尖端部。In the multi-light source optical darkroom of the present invention, both ends of the curved louver and the straight louver are provided with tip portions.
在本发明的这种多光源光学暗室中，所述导流遮光栅设有遮光通道，所述遮光通道由第一遮光栅和第二遮光栅配合形成，所述第一遮光栅和第二遮光栅均 采用底部宽顶部窄的设计。In the multi-light source optical darkroom of the present invention, the guide shutter is provided with a light-shielding channel, and the light-shielding channel is formed by the cooperation of a first shutter and a second shutter. The grating adopts the design of wide bottom and narrow top.
在本发明的这种多光源光学暗室中，所述第一遮光栅包括第一曲面遮光栅和第一直面遮光栅，所述第二遮光栅包括第二曲面遮光栅和第二直面遮光栅。In the multi-light source optical darkroom of the present invention, the first louver includes a first curved louver and a first straight louver, and the second louver includes a second curved louver and a second straight louver .
在本发明的这种多光源光学暗室中，所述第一直面遮光栅由第一外直面遮光栅和第一内直面遮光栅组成，所述第二直面遮光栅由第二外直面遮光栅和第二内直面遮光栅组成，所述第一外直面遮光栅和第一内直面遮光栅的角度为120°-130°。In the multi-light source optical darkroom of the present invention, the first straight louver is composed of a first outer straight louver and a first inner straight louver, and the second straight louver is composed of a second outer straight louver It is composed of a second inner straight shading grating, and the angle between the first outer straight shading grating and the first inner straight shading grating is 120°-130°.
在本发明的这种多光源光学暗室中，所述第一外直面遮光栅和第二外直面遮光栅的水平夹角为8°-10°，所述第一内直面遮光栅和第二内直面遮光栅的水平夹角为8°-10°。In the multi-light source optical darkroom of the present invention, the horizontal included angle between the first outer straight louver and the second outer straight louver is 8°-10°, and the first inner straight louver and the second inner louver are The horizontal included angle of the straight-faced louver is 8°-10°.
在本发明的这种多光源光学暗室中，所述第一内直面遮光栅和第二内直面遮光栅靠近光信号传感器的一端的宽度为2mm-3mm，所述第一内直面遮光栅和第二内直面遮光栅远离所述光信号传感器的一端的宽度为2mm-4mm。In the multi-light source optical darkroom of the present invention, the width of one end of the first inner straight shading grating and the second inner straight shading grating close to the optical signal sensor is 2mm-3mm, The width of one end of the two inner straight-face shading gratings away from the optical signal sensor is 2mm-4mm.
在本发明的这种多光源光学暗室中，所述第一曲面遮光栅和第二曲面遮光栅分别与所述第一直面遮光栅和第二直面遮光栅连接，所述第一曲面遮光栅和第二曲面遮光栅之间的入口通道宽度为2mm-3mm，出口通道宽度为2mm-4mm。In the multi-light source optical darkroom of the present invention, the first curved louvers and the second curved louvers are respectively connected with the first straight plane louvers and the second straight plane louvers, and the first curved louvers The width of the inlet channel and the second curved louver is 2mm-3mm, and the width of the outlet channel is 2mm-4mm.
在本发明的这种多光源光学暗室中，所述防尘防虫网上由横向栅条和竖向栅条组成，横向栅条和竖向栅条之间形成多个进烟网孔，所述进烟网孔的边长尺寸小于1mm。In the multi-light source optical darkroom of the present invention, the dust-proof and insect-proof net is composed of transverse grid bars and vertical grid bars, and a plurality of smoke inlet mesh holes are formed between the transverse grid bars and the vertical grid bars. The side length of the smoke mesh is less than 1mm.
在本发明的这种多光源光学暗室中，横向栅条和竖向栅条的横截面均为等腰梯形，多个竖向栅条之间排列形成多个竖向梯形槽口。In the multi-light source optical darkroom of the present invention, the cross-sections of the transverse grid bars and the vertical grid bars are both isosceles trapezoids, and a plurality of vertical trapezoidal slots are formed between the plurality of vertical grid bars.
在本发明的这种多光源光学暗室中，防尘防虫网的底面还设计有一灰尘陷阱区域，所述灰尘陷阱区域为圆形，该灰尘陷阱由多个锥形凸起部排列组合而成。In the multi-light source optical darkroom of the present invention, a dust trap area is also designed on the bottom surface of the dust-proof and insect-proof net. The dust trap area is circular, and the dust trap is formed by arranging and combining a plurality of conical protrusions.
在本发明的这种多光源光学暗室中，所述防尘防虫网的内部底面周围还设有围墙。In the multi-light source optical darkroom of the present invention, a surrounding wall is also provided around the inner bottom surface of the dust-proof and insect-proof net.
在本发明的这种多光源光学暗室中，围墙内部表面设计有夹角为60°的锯齿形凸凹。In the multi-light source optical darkroom of the present invention, the inner surface of the enclosure wall is designed with zigzag convexes and concaves with an included angle of 60°.
在本发明的这种多光源光学暗室中，所述围墙的外侧设有分区立面，所述分区立面包括8个导流栅，所述导流栅将所述分区立面为8个区域，所述分区立面为弧形面。In the multi-light source optical darkroom of the present invention, a partitioned facade is provided on the outer side of the enclosure wall, and the partitioned facade includes 8 flow guide grids, and the flow guide grid divides the partitioned facade into 8 regions , and the partition elevation is an arc surface.
在本发明的这种多光源光学暗室中，所述导流栅包括一梯形端部，所述梯形端部的截面大小与竖向梯形槽口的截面大小相同。In the multi-light source optical darkroom of the present invention, the guide grid includes a trapezoidal end portion, and the cross-sectional size of the trapezoidal end portion is the same as that of the vertical trapezoidal notch.
在本发明的这种多光源光学暗室中，所述防尘防虫网和光学暗室上分别设有公扣和母扣，防尘防虫网通过卡扣结构安装在光学暗室上。In the multi-light source optical darkroom of the present invention, the dust-proof and insect-proof net and the optical darkroom are respectively provided with male buckles and female buckles, and the dust-proof and insect-proof net is installed on the optical darkroom through a buckle structure.
实施本发明的这种多光源光学暗室，具有以下有益效果：Implementing the multi-light source optical darkroom of the present invention has the following beneficial effects:
(1)多光源以可探测更广的光谱，进而可识别更多粒径的粒子，进而判断是燃烧或热解产生的粒子还是悬浮在空气中的灰尘、水蒸气、或做饭时食物油产生的油烟，有效降低传感器的误报率。(1) Multiple light sources can detect a wider spectrum, and then can identify particles with more particle sizes, and then determine whether the particles are generated by combustion or pyrolysis or suspended in the air, such as dust, water vapor, or food oil during cooking The generated oil fume can effectively reduce the false alarm rate of the sensor.
(2)光信号发射和接收器件固定筒的位置设计，让4个轴心交点相交与同一点，且在暗室的中轴线上，目的是让三个传感器的探测区为同一区域，实现了无论来自哪个方向的烟雾粒子均可以以相同的速度扩散到探测区。进而保证了光学暗室对烟雾方位灵敏度的一致性。(2) The position of the fixed cylinder of the optical signal transmitting and receiving device is designed so that the intersection of the four axes intersect with the same point, and it is on the central axis of the darkroom. Smoke particles from any direction can diffuse to the detection area at the same speed. This ensures the consistency of the azimuth sensitivity of the optical darkroom to the smoke.
(3)防尘防虫网的设计有效的阻止大颗粒灰尘进入，阻止昆虫进入，对进入的灰尘设置的陷阱防止了灰尘对传感器灵敏度的影响，对气流的汇聚作用增加了传感器对烟雾响应的灵敏性。(3) The design of the dust-proof and insect-proof net can effectively prevent the entry of large particles of dust and insects. The traps set for the entering dust prevent the dust from affecting the sensitivity of the sensor, and the convergence of the airflow increases the sensitivity of the sensor to the smoke response. sex.
附图说明Description of drawings
图1为本发明的这种多光源光学暗室的结构示意图；Fig. 1 is the structural schematic diagram of this multi-light source optical darkroom of the present invention;
图2为图1的剖面结构示意图；Fig. 2 is the cross-sectional structure schematic diagram of Fig. 1;
图3为图1中光学传感器和光学暗室结构示意图，省去了电路板；FIG. 3 is a schematic structural diagram of the optical sensor and the optical darkroom in FIG. 1, omitting the circuit board;
图4为图3的一个方向结构示意图，主要展示了导流遮光栅的结构；FIG. 4 is a schematic diagram of the structure in one direction of FIG. 3 , mainly showing the structure of the guide shutter;
图5为图4的另一方向结构示意图，展示了进气方向；FIG. 5 is a schematic view of the structure in another direction of FIG. 4, showing the air intake direction;
图6为图5中第一导流遮光栅和第二导流遮光栅的结构示意图；FIG. 6 is a schematic structural diagram of the first guide shading grating and the second guide shading grating in FIG. 5;
图7为图1中的中的防尘防虫网结构示意图；Fig. 7 is the dust-proof and insect-proof net structure schematic diagram in Fig. 1;
图8为图7的一个方向示意图；Fig. 8 is a schematic diagram of a direction of Fig. 7;
图9为图7的另一个方向示意图；Fig. 9 is another direction schematic diagram of Fig. 7;
图10为图9的A部放大示意图；Fig. 10 is the enlarged schematic diagram of A part of Fig. 9;
图11为图8的A-A向剖视图；11 is a cross-sectional view taken along the line A-A of FIG. 8;
图12为图8的B-B向剖视图。FIG. 12 is a cross-sectional view taken along the line B-B in FIG. 8 .
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
如图1至图12所示的本发明的这种多光源光学暗室，其包括防尘防虫网10、光学暗室20、电路板30和光信号传感器，光信号传感器安装在电路板30上，光信号传感器包括后向光信号发射器件41、第一前向光信号发射器件42、光信号接收器件43和第二前向光信号发射器件44。后向光信号发射器件41、第一前向光信号发射器件42、光信号接收器件43和第二前向光信号发射器件44的一端安装在电路板30上，另一端分别安装在后向光信号发射器件固定筒45、第一前向光信号发射器件固定筒46、光信号接收器件固定筒47和第二前向光信号发射器件固定筒48内。The multi-light source optical darkroom of the present invention as shown in Fig. 1 to Fig. 12 includes a dust and insect proof net 10, an optical darkroom 20, a circuit board 30 and a light signal sensor. The light signal sensor is installed on the circuit board 30, and the light signal The sensor includes a backward optical signal emitting device 41 , a first forward optical signal emitting device 42 , an optical signal receiving device 43 and a second forward optical signal emitting device 44 . One end of the backward optical signal transmitting device 41, the first forward optical signal transmitting device 42, the optical signal receiving device 43 and the second forward optical signal transmitting device 44 are mounted on the circuit board 30, and the other ends are respectively mounted on the backward light. The signal emitting device fixing cylinder 45 , the first forward optical signal emitting device fixing cylinder 46 , the optical signal receiving device fixing cylinder 47 and the second forward optical signal emitting device fixing cylinder 48 are inside.
其中，后向光信号发射器件固定筒45、第一前向光信号发射器件固定筒46、光信号接收器件固定筒47和第二前向光信号发射器件固定筒48均为圆柱筒形，该圆柱筒为变径圆筒，变径圆筒的出光孔直径为3mm-4mm之间，后向光信号发射器件固定筒45、第一前向光信号发射器件固定筒46和第二前向光信号发射器件固定筒47的出光孔轴心线与光信号接收器件固定筒48的进光孔轴心线相交于一点，且交点在光学暗室20的轴心线上，并远离光学暗室20的底面。如此可以让三个光信号传感器的探测区域为同一区域，实现了无论来自那个方向的烟雾粒子均可以以相同的速度扩散到探测区。进而保证了光学暗室20对烟雾方位灵敏度的一致性。The rearward optical signal emitting device fixing cylinder 45, the first forward optical signal emitting device fixing cylinder 46, the optical signal receiving device fixing cylinder 47 and the second forward optical signal emitting device fixing cylinder 48 are all cylindrical. The cylindrical cylinder is a variable diameter cylinder, and the diameter of the light exit hole of the variable diameter cylinder is between 3mm and 4mm. The axis line of the light exit hole of the signal emitting device fixing cylinder 47 and the axis line of the light entrance hole of the light signal receiving device fixing cylinder 48 intersect at one point, and the intersection point is on the axis line of the optical darkroom 20 and away from the bottom surface of the optical darkroom 20 . In this way, the detection area of the three optical signal sensors can be the same area, so that the smoke particles from any direction can spread to the detection area at the same speed. This further ensures the consistency of the azimuth sensitivity of the optical darkroom 20 to the smoke.
较佳的，后向光信号发射器件固定筒45和光信号接收器件固定筒47之间为80°的锐角，利用了后向反射光原理，第一前向光信号发射器件固定筒46和第二前向光信号发射器件固定筒48与光信号接收器件固定筒47之间的角度为126°的钝角，属于利用了前向折射光原理。Preferably, there is an acute angle of 80° between the rearward optical signal emitting device fixing tube 45 and the optical signal receiving device fixing tube 47, using the principle of backward reflected light, the first forward optical signal emitting device fixing tube 46 and the second The angle between the forward optical signal emitting device fixing cylinder 48 and the optical signal receiving device fixing cylinder 47 is an obtuse angle of 126°, which belongs to the principle of forward refracted light.
光学暗室20包括底部安装板21，底部安装板21的内侧周围设有导流遮光栅22，导流遮光栅22的以光信号传感器中心为轴线旋转阵列分布在光信号传感器的周围。The optical darkroom 20 includes a bottom mounting plate 21. The inner side of the bottom mounting plate 21 is provided with a diversion shading grating 22, and a rotating array of the diversion shading grating 22 is distributed around the optical signal sensor with the center of the optical signal sensor as the axis.
导流遮光栅22由曲面遮光栅221和直面遮光栅222组成，曲面遮光栅221的高度低于直面遮光栅222的高度，曲面遮光栅221的高度加上围墙50的高度等于防尘防虫网10的高度，防尘防虫网10安装在光学暗室20后，由围墙50和曲面遮光栅221对外界的气流进行汇聚以及对外界光线进行遮挡，直面遮光栅222卡在围墙50的内壁，避免围墙50松动，使得安装结构牢固稳定。The guide shutter 22 is composed of a curved shutter 221 and a straight shutter 222. The height of the curved shutter 221 is lower than the height of the straight shutter 222. The height of the curved shutter 221 plus the height of the enclosure wall 50 is equal to the dust and insect proof net 10. After the dust-proof and insect-proof net 10 is installed in the optical darkroom 20, the surrounding wall 50 and the curved shading grating 221 are used to gather the outside air flow and block the outside light, and the straight-face shading grating 222 is stuck on the inner wall of the surrounding wall 50 to avoid the surrounding wall 50. Looseness makes the installation structure firm and stable.
曲面遮光栅221和直面遮光栅222的两端均设有尖端部224，尖端部224可以减少对气流的阻碍，使得烟雾粒子能够快速进入迷宫内部，提高光信号传感 器的灵敏度。Both ends of the curved shading grating 221 and the straight shading grating 222 are provided with tip portions 224. The tip portions 224 can reduce the obstruction to the airflow, so that the smoke particles can quickly enter the labyrinth and improve the sensitivity of the optical signal sensor.
导流遮光栅22设有遮光通道，遮光通道由第一遮光栅23和第二遮光栅24配合形成，第一遮光栅23和第二遮光栅24均采用底部宽顶部窄的设计。在烟雾的进气或出气过程中使遮光栅降低对气流的阻碍，使气流的飘进或飘出更加容易，使光信号传感器更容易探测到周围的烟雾变化，从而使光信号传感器响应更为灵敏；同时，烟气的容易飘出使光信号传感器降低对探测空间里人们抽烟引起的误报现象。The guide shading grating 22 is provided with a light shading channel, and the light shading channel is formed by the cooperation of the first shading grating 23 and the second shading grating 24 , both of which are designed with a wide bottom and a narrow top. In the process of smoke in or out, the shutter reduces the obstruction to the air flow, making it easier for the air to float in or out, so that the light signal sensor can more easily detect the changes in the surrounding smoke, so that the light signal sensor responds more easily. Sensitive; at the same time, the easy flow of smoke makes the optical signal sensor reduce the false alarm caused by people smoking in the detection space.
第一遮光栅23包括第一曲面遮光栅231和第一直面遮光栅232，第二遮光栅24包括第二曲面遮光栅241和第二直面遮光栅242，其中，第一直面遮光栅232由第一外直面遮光栅233和第一内直面遮光栅234组成，第二直面遮光栅242由第二外直面遮光栅243和第二内直面遮光栅244组成，第一外直面遮光栅233和第一内直面遮光栅234的角度为125°，其中，第一外直面遮光栅233和第二外直面遮光栅243的水平夹角为10°，第一内直面遮光栅234和第二内直面遮光栅244的水平夹角为10°。第一内直面遮光栅234和第二内直面遮光栅244的靠近光信号传感器的一端的宽度为3mm，第一内直面遮光栅234和第二内直面遮光栅244远离光信号传感器的一端的宽度为4mm。The first shutter 23 includes a first curved shutter 231 and a first straight shutter 232 , the second shutter 24 includes a second curved shutter 241 and a second straight shutter 242 , wherein the first straight shutter 232 It consists of a first outer straight shading plate 233 and a first inner straight shading plate 234. The second straight shading plate 242 consists of a second outer straight shading plate 243 and a second inner straight shading plate 244. The first outer straight shading plate 233 and The angle of the first inner straight shading barrier 234 is 125°, wherein the horizontal angle between the first outer straight shading barrier 233 and the second outer straight shading barrier 243 is 10°, and the first inner straight shading barrier 234 and the second inner straight shading barrier 234 are The horizontal included angle of the shutter grating 244 is 10°. The width of one end of the first inner straight shading grating 234 and the second inner straight shading grating 244 close to the optical signal sensor is 3 mm, and the width of one end of the first inner straight shading grating 234 and the second inner straight shading grating 244 away from the optical signal sensor is 3 mm. is 4mm.
第一曲面遮光栅231和第二曲面遮光栅241分别与第一直面遮光栅232和第二直面遮光栅242连接，第一曲面遮光栅231和第二曲面遮光栅241之间的入口通道宽度为3mm，出口通道宽度为4mm。遮光通道采用两段窄中间宽的“月牙形”设计，可以避免大部分外界光线进入光学暗室，即使能够通过遮光通道，大部分光线在遮光通道的中部区域不断的产生反射和散射现象而减弱，有效避免外界光线对光学暗室的干扰。导流遮光栅22采用以上间隔密度既可以保证从外部射来的光无法进入暗室，又可以一定程度降低导流遮光栅22的个数，降低 制造成本，且在外界气流汇聚作用下，周围的烟尘可以畅通地进入光学暗室内，提高光信号传感器的检测灵敏度。The first curved louvers 231 and the second curved louvers 241 are respectively connected with the first straight louvers 232 and the second straight louvers 242 , and the width of the entrance channel between the first curved louvers 231 and the second curved louvers 241 is 3mm, and the outlet channel width is 4mm. The shading channel adopts a "crescent shape" design with two narrow and middle wide sections, which can prevent most of the external light from entering the optical darkroom. Even if it can pass through the shading channel, most of the light is continuously reflected and scattered in the middle area of the shading channel and weakened. Effectively avoid the interference of external light on the optical darkroom. The above spacing density of the guide shading gratings 22 can not only ensure that the light emitted from the outside cannot enter the dark room, but also can reduce the number of the guide shading gratings 22 to a certain extent and reduce the manufacturing cost. The smoke and dust can enter the optical darkroom smoothly, which improves the detection sensitivity of the optical signal sensor.
防尘防虫网10上由横向栅条101和竖向栅条102组成，横向栅条101和竖向栅条102之间形成多个进烟网孔106，进烟网孔106的边长尺寸小于1mm，保证烟雾粒子可进入的同时又阻止1mm的昆虫进入。横向栅条101和竖向栅条102的横截面均为等腰梯形，有效降低对内外烟雾粒子进入或飘出的阻碍，防止误报。多个竖向栅条102之间排列形成多个竖向梯形槽口103。The dust-proof and insect-proof net 10 is composed of horizontal grid bars 101 and vertical grid bars 102. A plurality of smoke inlet mesh holes 106 are formed between the horizontal grid bars 101 and the vertical grid bars 102, and the side length of the smoke inlet mesh holes 106 is smaller than 1mm, to ensure that smoke particles can enter while preventing 1mm of insects from entering. The cross-sections of the horizontal grid bars 101 and the vertical grid bars 102 are both isosceles trapezoids, which effectively reduce the obstruction to the entry or escape of smoke particles inside and outside, and prevent false alarms. A plurality of vertical trapezoidal notches 103 are formed between the plurality of vertical grid bars 102 .
防尘防虫网10的底面还设计有一灰尘陷阱区域104，灰尘陷阱区域104为圆形，该灰尘陷阱104由多个锥形凸起部105排列组合而成。进入光学暗室20的灰尘经过自然沉降后，灰尘陷入锥形凸起部105的根部，此处是发射光照射不到的区域，属于灰尘陷阱，因此不会因为灰尘对发射光的散射而影响到接收信号的变化，此设计提高了光信号传感器的抗灰尘污染能力。The bottom surface of the dust-proof and insect-proof net 10 is also designed with a dust trap area 104 . The dust trap area 104 is circular, and the dust trap 104 is formed by arranging and combining a plurality of conical protrusions 105 . After the dust entering the optical darkroom 20 settles naturally, the dust falls into the root of the conical protrusion 105, which is an area that cannot be irradiated by the emitted light, and belongs to a dust trap, so it will not be affected by the scattering of the emitted light by the dust. The received signal changes, this design improves the anti-dust pollution ability of the optical signal sensor.
防尘防虫网10的内部底面周围还设有围墙50，用于拦截灰尘颗粒直接进入暗室内部，尤其是避免灰尘进入暗室内部底面，同时防止外界紊乱的气流对暗室内部陷进区域造成影响，以免引起锥形凸起部的根部灰尘的浮动。围墙50内部表面设计有夹角为60°的锯齿形凸凹51，让来自光信号发射器件发出的光线在凹槽内多次反射而被吸收掉。There is also a wall 50 around the inner bottom surface of the dust-proof and insect-proof net 10, which is used to block dust particles from directly entering the interior of the darkroom, especially to prevent dust from entering the bottom surface of the darkroom, and to prevent the turbulent airflow from the outside from affecting the interior of the darkroom. Causes the dust to float at the root of the conical protrusion. The inner surface of the enclosure wall 50 is designed with sawtooth-shaped protrusions and depressions 51 with an included angle of 60°, so that the light emitted from the optical signal emitting device is reflected multiple times in the groove and absorbed.
围墙50的外侧设有分区立面52，分区立面52包括8个导流栅53，导流栅53将分区立面52为8个区域，分区立面52为弧形面，进一步降低在烟雾的进气或出气的阻碍，对气流起到汇聚作用，避免气流从围墙外侧流失，增加了光信号传感器对烟雾响应的灵敏性。The outer side of the enclosure wall 50 is provided with a partitioned facade 52, and the partitioned facade 52 includes 8 guide grids 53. The guide grids 53 divide the partitioned facade 52 into 8 areas, and the partitioned facade 52 is an arc surface, which further reduces the smoke in the smoke. The obstruction of the air inlet or outlet, which can condense the air flow, avoid the air flow from the outside of the wall, and increase the sensitivity of the light signal sensor to the smoke response.
导流栅53包括一梯形端部531，梯形端部531的截面大小与竖向梯形槽口103的截面大小相同，梯形端部531卡入竖向梯形槽口103内，使得围墙50固 定在防尘防虫网10内，安装拆卸方便。The guide grille 53 includes a trapezoidal end portion 531. The cross-sectional size of the trapezoidal end portion 531 is the same as the cross-sectional size of the vertical trapezoidal slot 103. In the dust and insect net 10, the installation and disassembly are convenient.
较佳的，防尘防虫网10和光学暗室20上分别设有公扣105和母扣201，防尘防虫网10通过卡扣结构安装在光学暗室上，便于拆卸安装，尤其是方便定期对防尘防虫网10内的灰尘进行清理，保证光信号传感器的灵敏性。Preferably, the dust-proof and insect-proof net 10 and the optical darkroom 20 are respectively provided with a male buckle 105 and a female buckle 201, and the dust-proof and insect-proof net 10 is installed on the optical darkroom through a buckle structure, which is convenient for disassembly and installation, especially convenient for regular anti-proofing. The dust in the dust and insect net 10 is cleaned to ensure the sensitivity of the optical signal sensor.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改，等同替换和改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

  1. 一种多光源光学暗室，其特征在于包括防尘防虫网、光学暗室、电路板和光信号传感器，所述光信号传感器安装在电路板上，所述光信号传感器包括后向光信号发射器件、第一前向光信号发射器件、光信号接收器件和第二前向光信号发射器件，所述后向光信号发射器件、第一前向光信号发射器件、光信号接收器件和第二前向光信号发射器件的一端安装在所述电路板上，另一端分别安装在后向光信号发射器件固定筒、第一前向光信号发射器件固定筒、光信号接收器件固定筒和第二前向光信号发射器件固定筒内，A multi-light source optical darkroom is characterized in that it comprises a dust-proof and insect-proof net, an optical darkroom, a circuit board and a light signal sensor, the light signal sensor is mounted on the circuit board, and the light signal sensor comprises a backward light signal emitting device, a first A forward optical signal transmitting device, an optical signal receiving device and a second forward optical signal transmitting device, the backward optical signal transmitting device, the first forward optical signal transmitting device, the optical signal receiving device and the second forward optical signal One end of the signal emitting device is installed on the circuit board, and the other end is installed on the rearward optical signal emitting device fixing tube, the first forward optical signal emitting device fixing tube, the optical signal receiving device fixing tube and the second forward light respectively. In the fixed cylinder of the signal emitting device,
    其中，所述后向光信号发射器件固定筒、第一前向光信号发射器件固定筒、光信号接收器件固定筒和第二前向光信号发射器件固定筒均为圆柱筒形，该圆柱筒为变径圆筒，所述后向光信号发射器件固定筒、第一前向光信号发射器件固定筒和第二前向光信号发射器件固定筒的出光孔轴心线与所述光信号接收器件固定筒的进光孔轴心线相交于一点，且交点在所述光学暗室的轴心线上，并远离所述光学暗室的底面。Wherein, the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder, the optical signal receiving device fixing cylinder and the second forward optical signal emitting device fixing cylinder are all cylindrical. It is a variable diameter cylinder, and the axis lines of the light exit holes of the rearward optical signal emitting device fixing cylinder, the first forward optical signal emitting device fixing cylinder and the second forward optical signal emitting device fixing cylinder are related to the optical signal receiving cylinder. The axis lines of the light inlet holes of the device fixing cylinder intersect at one point, and the intersection point is on the axis line of the optical darkroom, and is far from the bottom surface of the optical darkroom.
  2. 根据权利要求1所述的多光源光学暗室，其特征在于，所述光学暗室包括底部安装板，所述底部安装板的内侧周围均匀阵列有导流遮光栅，所述导流遮光栅的以所述光信号传感器中心为轴线旋转阵列分布在所述光信号传感器的周围。The multi-light source optical darkroom according to claim 1, wherein the optical darkroom comprises a bottom mounting plate, and the inner side of the bottom mounting plate is uniformly arrayed with diversion shading gratings. The center of the optical signal sensor is an axis rotating array distributed around the optical signal sensor.
  3. 根据权利要求2所述的多光源光学暗室，其特征在于，所述导流遮光栅由曲面遮光栅和直面遮光栅组成，所述曲面遮光栅的高度低于所述直面遮光栅的高度。The multi-light source optical darkroom according to claim 2, wherein the guide shading grating is composed of a curved louver and a straight louver, and the height of the curved louver is lower than that of the straight louver.
  4. 根据权利要求3所述的多光源光学暗室，其特征在于，所述曲面遮光栅和直面遮光栅的两端均设有尖端部。The multi-light source optical darkroom according to claim 3, wherein both ends of the curved shading grating and the straight shading grating are provided with tip portions.
  5. 根据权利要求2所述的多光源光学暗室，其特征在于，所述导流遮光栅设有遮光通道，所述遮光通道由第一遮光栅和第二遮光栅配合形成，所述第一遮光 栅和第二遮光栅均采用底部宽顶部窄的设计。The multi-light source optical darkroom according to claim 2, wherein the guide shutter is provided with a light-shielding channel, and the light-shielding channel is formed by the cooperation of a first shutter and a second shutter, and the first shutter is provided with a light-shielding channel. And the second louver adopts the design of wide bottom and narrow top.
  6. 根据权利要求1所述的多光源光学暗室，其特征在于，所述防尘防虫网上由横向栅条和竖向栅条组成，横向栅条和竖向栅条之间形成多个进烟网孔，所述进烟网孔的边长尺寸小于1mm。The multi-light source optical darkroom according to claim 1, wherein the dust-proof and insect-proof net is composed of transverse grid bars and vertical grid bars, and a plurality of smoke inlet mesh holes are formed between the transverse grid bars and the vertical grid bars. , the side length dimension of the smoke inlet mesh is less than 1mm.
  7. 根据权利要求1至6任意一项所述的多光源光学暗室，其特征在于，防尘防虫网的底面还设计有一灰尘陷阱区域，所述灰尘陷阱区域为圆形，该灰尘陷阱由多个锥形凸起部排列组合而成。The multi-light source optical darkroom according to any one of claims 1 to 6, wherein the bottom surface of the dust-proof and insect-proof net is further designed with a dust trap area, the dust trap area is circular, and the dust trap consists of a plurality of cones. The convex parts are arranged and combined.
  8. 根据权利要求7所述的多光源光学暗室，其特征在于，所述防尘防虫网的内部底面周围还设有围墙。The multi-light source optical darkroom according to claim 7, wherein a surrounding wall is further provided around the inner bottom surface of the dust-proof and insect-proof net.
  9. 根据权利要求8所述的多光源光学暗室，其特征在于，围墙内部表面设计有夹角为60°的锯齿形凸凹。The multi-light source optical darkroom according to claim 8, wherein the inner surface of the enclosure wall is designed with zigzag convexes and concaves with an included angle of 60°.
  10. 根据权利要求8所述的多光源光学暗室，其特征在于，所述围墙的外侧设有分区立面，所述分区立面包括8个导流栅，所述导流栅将所述分区立面为8个区域，所述分区立面为弧形面。The multi-light source optical darkroom according to claim 8, wherein a partitioned facade is provided on the outer side of the enclosure wall, and the partitioned facade comprises 8 flow guide grids, and the flow guide grids connect the partitioned facades. There are 8 areas, and the partition facade is an arc surface.
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