阅读说明：本技术 黑烟白烟同一灵敏度的点型光电感烟探测器及其探测方法 (Point type photoelectric smoke detector with same sensitivity for black smoke and white smoke and detection method thereof ) 是由 李金星 严宝华 安磊 于 2019-10-21 设计创作，主要内容包括：本申请提供一种黑烟白烟同一灵敏度的点型光电感烟探测器及其探测方法,包括：探测器和探测器底座,探测器卡接在探测器底座上,探测器包括探测器上盖、迷宫和设置在迷宫内的电路板,电路板上贴设有贴片光发射器和贴片光接收器；迷宫安装在探测器上盖内；迷宫包括迷宫盖和与迷宫盖卡接的迷宫底座,迷宫盖顶面为防虫网,迷宫内设有光发射组件和光接收组件,光发射组件最终形成以出光面为底面的锥体形发射主光路；光接收组件最终形成以光接收器进光面中心为锥顶的锥体形接收主光路,所述发射主光路的散射光能够照射到所述光接收组件进光面的区域为烟雾的探测区域。本申请探测器用单只贴片光发射器和贴片光接收器就可实现黑烟、白烟同一灵敏度的烟雾探测功能,焊上贴片温度传感器就可实现感烟感温复合探测器的所有功能。本申请进烟顺畅,不同气流环境下迷宫内外烟雾浓度一致,无明显方位差异,并可实现全贴片化、无螺钉化、小型化及低成本化。(The application provides a point type photoelectric smoke detector with the same sensitivity of black smoke and white smoke and a detection method thereof, comprising the following steps: the detector comprises a detector upper cover, a labyrinth and a circuit board arranged in the labyrinth, wherein a patch light emitter and a patch light receiver are attached to the circuit board; the labyrinth is arranged in the upper cover of the detector; the labyrinth comprises a labyrinth cover and a labyrinth base clamped with the labyrinth cover, the top surface of the labyrinth cover is an insect-proof net, a light-emitting component and a light-receiving component are arranged in the labyrinth, and the light-emitting component finally forms a cone-shaped emission main light path with a light-emitting surface as a bottom surface; the light receiving assembly finally forms a cone-shaped receiving main light path taking the center of a light inlet surface of the light receiver as a cone top, and the area of the light inlet surface of the light receiving assembly, which can be irradiated by scattered light of the emitting main light path, is a smoke detection area. This application detector just can realize the smog detection function of black cigarette, the same sensitivity of white cigarette with single paster light emitter and paster photoreceiver, welds all functions that paster temperature sensor just can realize sensing cigarette temperature-sensing composite detector. The smoke inlet is smooth, the concentration of smoke inside and outside the labyrinth is consistent under different airflow environments, no obvious azimuth difference exists, and full pasting, no screw, miniaturization and low cost can be realized.)

1. The utility model provides a same point type photoelectric smoke detector of sensitivity of black cigarette white cigarette which characterized in that includes: the detector comprises a detector and a detector base, wherein the detector is clamped on the detector base and comprises a detector upper cover, a labyrinth and a circuit board arranged in the labyrinth, and a patch light emitter and a patch light receiver are attached to the circuit board; the labyrinth is arranged in the upper cover of the detector; the light emitting module and the light receiving module are arranged in the labyrinth, and the light emitting module finally forms a cone-shaped emission main light path taking the light emitting surface as the bottom surface; the light receiving assembly finally forms a cone-shaped receiving main light path taking the center of the light inlet surface of the patch light receiver as a cone apex, and the area of the light inlet surface of the light receiving assembly, which can be irradiated by the scattered light of the emitting main light path, is a smoke detection area.

2. The point type photoelectric smoke detector with the same sensitivity as black smoke and white smoke according to claim 1, wherein the detector upper cover is convexly provided with a conical smoke guide device from the cover top to the labyrinth direction, the conical top of the conical smoke guide device abuts against the central position of the insect-proof net, the peripheral wall of the conical smoke guide device extends towards the inner wall direction of the detector upper cover to form a plurality of triangular separation blades, the triangular separation blades are uniformly arranged at intervals, a smoke inlet cavity is formed between the detector upper cover, two adjacent triangular separation blades, the peripheral wall of the conical smoke guide device and the insect-proof net, the side wall of the detector upper cover is provided with a smoke inlet, and the smoke inlet is communicated with the smoke inlet cavity.

3. The spot type photoelectric smoke detector of the same sensitivity as black smoke and white smoke of claim 1, wherein the light emitting component comprises a light emitter shielding column, a light emitter light guide column and a light emitter light guide pipe, two ends of the light emitter shielding column are respectively connected with the labyrinth cover and the circuit board, the light emitter light guide column is arranged inside the light emitter shielding column, the light emitter light guide column is arranged on the light emitting side of the patch light emitter, the light emitter light guide pipe and the light emitter shielding column are integrally formed and arranged at the light emitting surface of the light emitter light guide column along the horizontal direction, and the light emitter light guide column is used for changing the propagation direction of light.

4. The spot type photoelectric smoke detector according to claim 3, wherein the light receiving assembly comprises a light receiver shielding column, a light receiver light guiding column and a receiving light guiding pipe, two ends of the light receiver shielding column are respectively connected to the labyrinth cover and the circuit board, the light receiver light guiding column is disposed inside the light receiver shielding column, the light receiver light guiding column is disposed on a light receiving side of the patch light receiver, the receiving light guiding pipe is integrally formed with the light receiver shielding column and is disposed at a light inlet surface of the light receiver light guiding column along a horizontal direction, and the light receiver light guiding column is used for changing a propagation direction of light.

5. The spot type photoelectric smoke detector according to claim 4, wherein an end of the receiving light pipe away from the light-receiving-unit shielding column is a C-shaped light-shielding device, the C-shaped light-shielding device has an axial through hole, and a peripheral wall of the C-shaped light-shielding device has a structure with three faces closing one face and an opening, wherein the opening is oriented toward the main emission light path.

6. The spot type photoelectric smoke detector with the same sensitivity as the black smoke and white smoke of claim 4, wherein an included angle γ formed by the first light reflecting surface of the light emitter light guide column and the second light reflecting surface of the light receiver light guide column ranges from 105 degrees to 135 degrees.

7. The spot type photoelectric smoke detector according to claim 1, wherein the light absorbing and reflecting blades of the primary reflection region of the light trap region are right light absorbing and reflecting blades, and the right light absorbing and reflecting blades reflect and absorb the emitted light irradiated thereon to one side of the light emitting element; the light absorption and reflection blades of the secondary reflection area of the light trap area are leftward light absorption and reflection blades, and the leftward light absorption and reflection blades reflect and absorb emitted light irradiated on the leftward light absorption and reflection blades to one side of the light receiving component.

8. The spot type photoelectric smoke detector of claim 4, wherein the light receiver light guide comprises a second light inlet surface, a second light reflecting surface and a second light outlet surface; the second light inlet surface is positioned on the side surface of the light guide column of the light receiver, and the second light inlet surface is arranged along the vertical direction and is positioned close to the light receiving guide pipe; the second reflecting surface is obliquely arranged on the top surface of the light guide column of the light receiver, and the included angle beta between the second reflecting surface and the circuit board is 40-60 degrees; the second light-emitting surface is arranged on the bottom surface of the light guide column of the light receiver, the second light-emitting surface is correspondingly arranged above the patch light receiver, and the second light-emitting surface is a spherical surface.

9. A detection method of a point type photoelectric smoke detector with the same sensitivity of black smoke and white smoke is characterized by comprising the following steps:

step S1, sampling, setting a sampling period for collecting smoke signals, uniformly distributing the sampling period into a plurality of sub-sampling periods, and carrying out primary sampling in each sub-sampling period;

step S2, judging whether the sampled data exceed the early warning value, if yes, executing step S3, and if not, continuing sampling;

step S3, judging the smoke type, and correspondingly correcting the fire alarm value according to the smoke type;

and step S4, judging whether the sampling data exceeds the corrected fire alarm value, if so, performing fire alarm, and if not, ending the process.

10. The method for detecting a point type photoelectric smoke detector with the same sensitivity as black smoke and white smoke according to claim 9, wherein the step S3 comprises the following sub-steps:

step S310, starting a strong light and weak light alternative sampling mode, and collecting smoke concentration data;

step S320, judging whether the sampling data is similar to the paraffin smoke model or not, and if so, correcting the paraffin fire sampling value of the sampling data; if not, go to step S330;

step S330, judging whether the sampling data is similar to the cotton rope smoke model, if so, correcting the cotton rope fire sampling value of the sampling data; if not, go to step S340;

step S340, judging whether the sampling data is similar to the wood smoke model or not, and if so, correcting the wood fire sampling value of the sampling data; if not, go to step S350;

step S350, judging whether the sampling data is similar to the polyurethane smoke model or not, if so, correcting the polyurethane fire sampling value of the sampling data, and if not, executing step S360;

and step S360, judging whether the sampling data is similar to an n-heptane smoke model, if so, correcting the n-heptane fire sampling value of the sampling data, and if not, judging whether the sampling data meets a forced alarm condition.

Technical Field

The application relates to the technical field of smoke detection, in particular to a point type photoelectric smoke detector with the same sensitivity for black smoke and white smoke and a detection method thereof.

Background

At present, the point type photoelectric smoke detector is designed according to the principle that smoke particles scatter and reflect light. The method can be divided into a forward scattering type, a backward scattering type, a front and back combined bidirectional scattering type and a dual-band scattering type according to the detection principle. The forward scattering type has high sensitivity but is insensitive to black smoke, and cannot meet the requirement of the same sensitivity of black smoke and white smoke of a new national standard; although the response of the current back scattering to black and white smoke is better consistent, the maze smoke feeding is difficult, the direction is poorer, the size is larger, and the miniaturization is difficult to realize; the front and back combination of the bidirectional scattering type and the two-waveband scattering type can solve the problem of the same sensitivity of black smoke and white smoke, but the two infrared receiving tubes or the two infrared transmitting tubes are needed to be realized together with complicated data analysis and calculation, and the technology has complicated process, higher cost and poor reliability.

Disclosure of Invention

The utility model aims to provide a black cigarette is with some type photoelectric smoke detector of sensitivity and detection method thereof, this application smoke detector just can realize black cigarette, the same sensitivity of white cigarette with single paster light emitter and paster photoreceiver, and it is smooth and easy to advance the cigarette, and the inside and outside smog concentration in the maze is unanimous under the different air current environment, does not have obvious azimuth difference to can realize full paster ization, screwless, miniaturization and low cost.

In order to achieve the above object, the present application provides a point type photoelectric smoke detector with the same sensitivity for black smoke and white smoke, comprising: the detector comprises a detector and a detector base, wherein the detector is clamped on the detector base and comprises a detector upper cover, a labyrinth and a circuit board arranged in the labyrinth, and a patch light emitter and a patch light receiver are attached to the circuit board; the labyrinth is arranged in the upper cover of the detector; the light emitting module and the light receiving module are arranged in the labyrinth, and the light emitting module finally forms a cone-shaped emission main light path taking the light emitting surface as the bottom surface; the light receiving assembly finally forms a cone-shaped receiving main light path taking the center of the light inlet surface of the patch light receiver as a cone apex, and the area of the light inlet surface of the light receiving assembly, which can be irradiated by the scattered light of the emitting main light path, is a smoke detection area.

As above, the conical smoke guide device is convexly arranged from the top cover of the upper detector cover to the labyrinth direction, the conical top of the conical smoke guide device abuts against the central position of the insect-proof net, the peripheral wall of the conical smoke guide device extends to the inner wall direction of the upper detector cover to form a plurality of triangular separation blades, the triangular separation blades are uniformly arranged at intervals, a smoke inlet cavity is formed between the upper detector cover, two adjacent triangular separation blades, the peripheral wall of the conical smoke guide device and the insect-proof net, a smoke inlet hole is formed in the side wall of the upper detector cover, and the smoke inlet hole is communicated with the smoke inlet cavity.

As above, the light emitting assembly includes a light emitter shielding column, a light emitter light guide column and a light emitter light guide tube, two ends of the light emitter shielding column are respectively connected to the labyrinth cover and the circuit board, the light emitter light guide column is disposed inside the light emitter shielding column, the light emitter light guide column is disposed on the light emitting side of the patch light emitter, the light emitter light guide tube and the light emitter shielding column are integrally formed and disposed on the light emitting surface of the light emitter light guide column along the horizontal direction, and the light emitter light guide column is used for changing the transmission direction of light.

As above, the light receiving assembly includes a light receiver shading column, a light receiver light guiding column and a receiving light guiding pipe, two ends of the light receiver shading column are respectively connected with the labyrinth cover and the circuit board, the light receiver light guiding column is disposed inside the light receiver shading column, the light receiver light guiding column is disposed on the light receiving side of the patch light receiver, the receiving light guiding pipe is integrally formed with the light receiver shading column and is disposed at the light inlet surface of the light receiver light guiding column along the horizontal direction, and the light receiver light guiding column is used for changing the propagation direction of light.

As above, one end of the receiving light pipe away from the light-shielding column of the light receiver is a C-shaped light-shielding device, a through hole is axially formed in the C-shaped light-shielding device, the peripheral wall is a three-sided closed one-sided opening structure, and the opening direction faces the emission main light path.

As above, an included angle γ formed between the first light reflecting surface of the light emitter light guiding pillar and the second light reflecting surface of the light receiver light guiding pillar ranges from 105 degrees to 135 degrees.

The light absorbing and reflecting blades in the primary reflection region of the light trap region are right light absorbing and reflecting blades, and the right light absorbing and reflecting blades reflect and absorb the emitted light irradiated on the right light absorbing and reflecting blades to one side of the light emitting component; the light absorption and reflection blades of the secondary reflection area of the light trap area are leftward light absorption and reflection blades, and the leftward light absorption and reflection blades reflect and absorb emitted light irradiated on the leftward light absorption and reflection blades to one side of the light receiving component.

As above, the light receiver light guide pillar includes a second light inlet surface, a second light reflecting surface and a second light outlet surface; the second light inlet surface is positioned on the side surface of the light guide column of the light receiver, and the second light inlet surface is arranged along the vertical direction and is positioned close to the light receiving guide pipe; the second reflecting surface is obliquely arranged on the top surface of the light guide column of the light receiver, and the included angle beta between the second reflecting surface and the circuit board is 40-60 degrees; the second light-emitting surface is arranged on the bottom surface of the light guide column of the light receiver, the second light-emitting surface is correspondingly arranged above the patch light receiver, and the second light-emitting surface is a spherical surface. A detection method of a point type photoelectric smoke detector with the same sensitivity of black smoke and white smoke comprises the following steps:

step S1, sampling, setting a sampling period for collecting smoke signals, uniformly distributing the sampling period into a plurality of sub-sampling periods, and carrying out primary sampling in each sub-sampling period;

step S2, judging whether the sampled data exceed the early warning value, if yes, executing step S3, and if not, continuing sampling;

step S3, judging the smoke type, and correspondingly correcting the fire alarm value according to the smoke type;

and step S4, judging whether the sampling data exceeds the corrected fire alarm value, if so, performing fire alarm, and if not, ending the process.

As above, step S3 includes the following sub-steps:

step S310, starting a strong light and weak light alternative sampling mode, and collecting smoke concentration data;

step S320, judging whether the sampling data is similar to the paraffin smoke model or not, and if so, correcting the paraffin fire sampling value of the sampling data; if not, go to step S330;

step S330, judging whether the sampling data is similar to the cotton rope smoke model, if so, correcting the cotton rope fire sampling value of the sampling data; if not, go to step S340;

step S340, judging whether the sampling data is similar to the wood smoke model or not, and if so, correcting the wood fire sampling value of the sampling data; if not, go to step S350;

step S350, judging whether the sampling data is similar to the polyurethane smoke model or not, if so, correcting the polyurethane fire sampling value of the sampling data, and if not, executing step S360;

and step S360, judging whether the sampling data is similar to an n-heptane smoke model, if so, correcting the n-heptane fire sampling value of the sampling data, and if not, judging whether the sampling data meets a forced alarm condition.

The beneficial effect that this application realized is as follows:

(1) this application uses a set of solitary light transmitter subassembly transmission light pipe and light receiver subassembly to receive the principle that the light pipe adopted the backscattering to make the change of different particle diameter signals not as sensitive as forward scattering, and the sensitivity of various cigarette will probably realize the homogenization relatively.

(2) This application adopts the special integrated chip of cigarette end, has reduced the circuit board area, and the effectual influence that reduces space radiation to amplifier circuit has improved the stability of signal, can realize the sampling of undercurrent high gain signal, for differential sampling, the integral operation provides the guarantee, makes the stability of detector reach a new height.

(3) The luminous intensity of steerable paster light emitter of this application realizes carrying out highlight and low light sampling in turn under same extinction coefficient (M) value, judges smog kind according to the sampling difference of the highlight under the same M value, low light, carries out data correction according to the characteristic of different smog again, realizes that black and white cigarette alarm sensitivity is the same.

(4) This application advances the cigarette smoothly, increases a paster temperature sensor on the circuit board, alright realize cigarette, temperature composite detector's all functions.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is an exploded view of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 4 is a schematic view of a light guide pillar structure of a light emitter of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 5 is a schematic view of a light guide pillar structure of a light receiver of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a light-shielding column and a C-shaped light-shielding device of a light receiver of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a control circuit of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 8 is a flowchart of a detection method of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 9 is a flow chart of sampling and alarm determination of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to an embodiment of the present invention.

Fig. 10 is an exploded view of a point-type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to another embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of a point type photoelectric smoke detector with the same sensitivity for black smoke and white smoke according to another embodiment of the present invention.

Reference numerals: 1-detector upper cover; 2-maze; 3-a detector base; 4-a light-receiver shading column; 5-light emitter light guide column; 6-light receiver light guide column; 7-a circuit board; 8-a binding post; 9-a saw-tooth structure; 11-smoke inlet holes; 12-light guide post opening; 13-a conical smoke guide device; 21-a labyrinth base; 22-labyrinth cover; 23-left direction light absorbing reflective vanes; a 24-C shaped shade; 25-insect-proof net; 26-a clamping part; 27-a bump; 28-right light absorbing reflective vanes; 50-a first light inlet surface; 51-a first light-reflecting surface; 52-a first light-emitting surface; 61-a second light inlet surface; 62-a second light-reflecting surface; 63-a second light-emitting surface; 71-patch light emitter; 72-patch optical receiver; 73-indicator light; 74-indicator light guide post; 75-light emitter shading column; 76-an emission light pipe; 77-emission main optical path; 78-receiving the main light path; 79 — a first detection zone; 80-a second detection zone; 100-a signal acquisition element; 101-an amplifier; 102-an analog-to-digital conversion module; 103-a processor; 104-a voltage stabilizer; 1031-smoke and temperature detection control module; 1032-a light emitter control module; 1033-a microcontroller; 1034-IO control module; 1035-data storage.

Detailed Description

The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.