Smoke detection device, method, equipment, storage medium and program product

Abstract

The present disclosure relates to a smoke detection device, method, equipment, storage medium and program product. It includes that when detecting the air in the current environment, a first detection unit can be used to detect the air in the current environment to obtain the detection result corresponding to the first detection unit; when the detection result corresponding to the first detection unit is an abnormal detection result, the air in the first detection unit is introduced into the second detection unit through the first filter by an air guide unit, and the filtered air is detected by the second detection unit to obtain the target detection result. Based on this, the air in the current environment is firstly detected by the first detection unit, and when the detection result is an abnormal detection result, the second detection unit is started to perform further detection. In this way, the false alarm and missed alarm problems of the smoke detector can be solved while ensuring the detection sensitivity, and the detection accuracy of the smoke detector can also be guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of Internet of Things fire protection, and in particular to a smoke detection device, method, equipment, storage medium and program product. Background Art

[0002] For photoelectric smoke detectors, the main principle is to use the scattering effect of smoke particles on light to detect fire smoke.

[0003] In the related art, in order to improve the sensitivity of the detector, the alarm threshold is usually lowered to improve the sensitivity of the photoelectric smoke detector. However, excessive sensitivity may cause false alarms in the presence of dust in the air or in an environment with frequent flow, thereby causing unnecessary panic. Summary of the invention

[0004] In view of this, the embodiments of the present disclosure provide a smoke detection device, method, equipment, storage medium and program product to solve the problems existing in the related art.

[0005] According to a first aspect of an embodiment of the present disclosure, a smoke detection device is provided, the method comprising: a shell; a first detection unit, arranged in the shell, for detecting the air in the current environment; a first filter, arranged in the shell and located at the bottom of the first detection unit, for filtering the air in the first detection unit; a second detection unit, arranged in the shell and located at the bottom of the first filter, for detecting the air filtered by the first filter; an air guide unit, arranged in the shell and located at the bottom of the second detection unit, for introducing the air in the first detection unit into the second detection unit.

[0006] A second aspect of an embodiment of the present disclosure provides a smoke detection method, which is applied to a smoke detection device such as the first aspect, and the method includes: using a first detection unit to detect the air in the current environment to obtain a detection result corresponding to the first detection unit; when the detection result corresponding to the first detection unit is an abnormal detection result, using an air guide unit to introduce the air in the first detection unit into the second detection unit through a first filter, and using the second detection unit to detect the filtered air to obtain a target detection result.

[0007] According to a third aspect of the embodiments of the present disclosure, a smoke detection device is provided, which is applied to the smoke detection method according to the second aspect. The device includes: a first detection module, which is used to detect the air in the current environment using a first detection unit to obtain a detection result corresponding to the first detection unit; a second detection module, which is used to, when the detection result corresponding to the first detection unit is an abnormal detection result, use an air guide unit to introduce the air in the first detection unit into the second detection unit through a first filter, and use the second detection unit to detect the filtered air to obtain a target detection result.

[0008] According to a fourth aspect of an embodiment of the present disclosure, a computer device is provided, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above-mentioned smoke detection method.

[0009] According to a fifth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the steps of the above-mentioned smoke detection method are implemented.

[0010] According to a sixth aspect of the present disclosure, a computer program product is provided, and when the computer program / instructions are executed by a processor, the steps of the above-mentioned smoke detection method are implemented.

[0011] At least one of the above technical solutions adopted in the embodiments of the present disclosure can achieve the following beneficial effects: the first detection unit can be used to detect the air in the current environment to obtain the detection result corresponding to the first detection unit; when the detection result corresponding to the first detection unit is an abnormal detection result, the air in the first detection unit is introduced into the second detection unit through the first filter by the air guide unit, and the filtered air is detected by the second detection unit to obtain the target detection result. Based on this, the air in the current environment is firstly detected by the first detection unit, and the second detection unit is started for further detection when the detection result is an abnormal detection result. In this way, the false alarm and missed alarm problems of the smoke detector can be solved while ensuring the detection sensitivity, and the detection accuracy of the smoke detector can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0013] Figure 1A schematic structural diagram of a smoke detection device provided by an exemplary embodiment of the present disclosure;

[0014] Figure 2 A schematic structural diagram of an upper partition provided by an exemplary embodiment of the present disclosure;

[0015] Figure 3 A schematic structural diagram of a first detection unit provided by an exemplary embodiment of the present disclosure;

[0016] Figure 4 A schematic diagram of the structure of a first detection cavity provided by an exemplary embodiment of the present disclosure;

[0017] Figure 5 A schematic structural diagram of a second detection unit provided by an exemplary embodiment of the present disclosure;

[0018] Figure 6 A schematic diagram of the structure of a second detection cavity provided by an exemplary embodiment of the present disclosure;

[0019] Figure 7 A schematic diagram of the structure of a connecting buckle provided by an exemplary embodiment of the present disclosure;

[0020] Figure 8 A layout diagram of a connecting buckle provided for an exemplary embodiment of the present disclosure;

[0021] Fig. 9 A flow chart of a smoke detection method provided by an exemplary embodiment of the present disclosure;

[0022] Fig.10 A schematic structural diagram of another smoke detection device provided by an exemplary embodiment of the present disclosure;

[0023] Fig.11 A flowchart of another smoke detection method provided by an exemplary embodiment of the present disclosure;

[0024] Fig.12 A schematic structural diagram of another smoke detection device provided as an exemplary embodiment of the present disclosure;

[0025] Fig.13 A schematic diagram of the structure of an electronic device provided for an exemplary embodiment of the present disclosure;

[0026] Fig.14 A schematic diagram of the structure of a computer system provided for an exemplary embodiment of the present disclosure;

[0027] Fig.15 A schematic diagram of a computer program product provided for an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0029] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0030] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0031] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0032] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0033] In practical applications, smoke detectors are a type of fire detection equipment that is mainly used to detect the concentration of smoke particles in the environment and is a key component of the automatic fire alarm system. In practical applications, smoke detectors can include photoelectric smoke detectors, linear beam smoke detectors, ionization smoke detectors and aspirating smoke detectors.

[0034] In the related art, the main principle of photoelectric smoke detectors is to detect fire smoke by using the scattering effect of smoke particles on light. Specifically, when a fire occurs, tiny particles in the smoke will enter the detection cavity of the smoke detector, and the smoke particles entering the detection cavity will scatter the light emitted from the inside of the smoke detector. When the scattered light intensity reaches a certain level, the photoelectric smoke detector will send out an alarm signal.

[0035] For linear beam smoke detectors, optical principles are mainly used for fire detection. Specifically, linear beam smoke detectors are mainly composed of two parts: a transmitter and a receiver. The transmitter is used to emit a beam of modulated infrared light or laser, and the receiver is used to receive this beam of light. Based on this, under normal circumstances, the receiver can stably receive the light signal, and when smoke enters the path of the light beam propagation, the smoke particles will scatter and absorb the light, causing the light intensity corresponding to the light signal received by the receiver to weaken. When the light intensity weakens to a certain extent and reaches the pre-set alarm threshold, the linear beam smoke detector will send out an alarm signal.

[0036] For ionization smoke detectors, smoke can be detected by using the effect of smoke particles on ionization current. Specifically, an ionization smoke detector has an ionization chamber filled with radioactive substances and positive and negative electrodes. Therefore, under normal working conditions, the air molecules in the ionization chamber will be ionized to generate a weak current. When smoke particles enter the ionization chamber, the smoke particles will absorb the positive and negative ions in the air, thereby affecting the balance of the ionization current, causing the current to change, thereby sending out an alarm signal.

[0037] Aspirating smoke detectors, also known as air sampling fire detectors and very early fire alarms, are automatic fire alarm devices that use air sampling tubes to draw air from the detection area into the detector for analysis, thereby achieving early warning of fires. Specifically, the air pump inside the aspirating smoke detector can actively and continuously extract the air in the detection area through the sampling pipe network. When smoke particles exist in the air, the smoke particles will enter the sensing chamber of the smoke detector and cause the laser to scatter. At this time, the optical sensor in the aspirating smoke detector can capture the changes in this scattered light and convert it into an electrical signal. Finally, the electrical signal can be analyzed and processed. When the concentration of smoke particles reaches the preset alarm threshold, an alarm signal will be issued.

[0038] In practical applications, due to the simple structure and low cost of photoelectric smoke detectors, most fire scenes such as factories, shelves, and workshops currently use scattered photoelectric smoke detectors. This type of detector often sets an optical maze in the optical front-end structure, so that natural light is attenuated in the optical maze and blocked outside the optical front-end detection area. Due to the existence of the optical maze, the time for smoke particles to reach the optical front-end structure will be longer, thereby reducing the detection efficiency of the detector and slowing down the response speed; and in scenes with low smoke concentration and small smoke particle size, the photosensitive diode in the photoelectric smoke detector has poor responsiveness and cannot warn of fire in time, thus causing personal safety and property losses.

[0039] In order to solve the above problems, the existing technology can improve the sensitivity of photoelectric smoke detectors by lowering the alarm threshold, but the increased sensitivity often leads to false alarms. For example, in an environment with dust in the air or frequent flow, false alarms will occur, which will cause great trouble and extremely low maintenance efficiency to companies or individuals with many devices, and even cause unnecessary panic.

[0040] Based on this, the embodiment of the present disclosure provides a smoke detection device, which can mainly include a first detection unit, a second detection unit, a filter and an air guide unit. In specific use, the first detection unit can be used to detect the air in the current environment and obtain a first detection result. When the first detection result is abnormal, the air guide unit is started to introduce the air in the first detection unit into the second detection unit, and the second detection unit further detects the air, and then sends an alarm signal when the second detection result is also abnormal. Based on this, while ensuring the detection sensitivity, the false alarm and missed alarm problems of the smoke detector can be solved, and the detection accuracy of the smoke detector can also be guaranteed.

[0041] In practical applications, the first detection unit can be a detection device with high sensitivity and strong anti-interference ability, and the second detection unit can be a detection device with high precision. At the same time, a micron-level filter can be set between the first detection unit and the second detection unit, so that larger smoke particles in the air can be filtered out, so that the second detection unit can detect the air more accurately. Specifically, the filter can filter out black smoke and dust above 1μm, which can ensure the sensitivity of the detection and the accuracy of the detection, and minimize false alarms and missed alarms. Based on this, the embodiment of the present disclosure is highly applicable to scenes with many interference factors such as dust and high reliability, such as factories, tobacco warehouses, banks, archives, high-speed trains, containers, roadside houses and other environments.

[0042] Figure 1 The following is a schematic diagram of a smoke detection device provided by an exemplary embodiment of the present disclosure. Figure 1 As shown, it specifically includes: a housing 101, a first detection unit 102 located in the housing 101, a second detection unit 104, an air intake duct 106 and an air guide unit 107. The housing 101 may include a front housing 1011, a middle housing 1012 and a lower housing 1013, and the side of the front housing 1011 may be a grille structure, and the air guide unit 107 may include an exhaust duct 1071 and an exhaust fan 1072.

[0043] In some embodiments, the smoke detection device may further include a plurality of partitions 108 disposed inside from top to bottom, specifically including an upper partition 1081, a middle partition 1082, and a lower partition 1083. Among them, the middle partition 1082 may be a control board, including a first drive unit corresponding to the first detection unit 102, a second drive unit corresponding to the second detection unit 104, a third drive unit corresponding to the exhaust fan 1072, a signal processing unit, a power supply unit, etc., and may also include various signal processing and signal amplification circuits.

[0044] Based on this, the area enclosed by the front shell 1011 and the upper partition 1081 can be determined as the upper chamber; the area enclosed by the middle shell 1012, the upper partition 1081 and the middle partition 1082 can be determined as the middle chamber; the area enclosed by the lower shell 1013, the middle partition 1082 and the lower partition 1083 can be determined as the lower chamber. It should be understood that the control board here can be a ring-shaped circuit board and is arranged inside the smoke detector, so that the control board can be isolated from the outside to prevent dust and smoke in the external air from damaging the circuit board, thereby increasing the service life of the circuit board.

[0045] The first detection unit 102 may be arranged inside the upper chamber, the second detection unit 104 may be arranged inside the middle chamber, and the air intake duct 106 may penetrate the middle partition 1082, and be respectively connected to the second detection unit 104 and the air guide unit 107. In the specific arrangement, the axial direction of the air guide unit 107 may be arranged perpendicular to the axial direction of the air intake duct 106, and the central axis of the exhaust fan 1072 may be parallel to the axial direction of the air intake duct 106, so as to exhaust the air inside the smoke detection device and to inhale the air in the upper chamber into the middle chamber.

[0046] Figure 2 The schematic diagram of the structure of an upper partition provided by an exemplary embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the air in the upper chamber can enter the middle chamber through a plurality of through holes in the through hole area 202 on the upper partition plate 201 .

[0047] Based on this, when the smoke detection device is used to detect the air, the power supply unit can be turned on to power the smoke detection device so that the smoke detection device can work. At this time, the air entering the smoke detection device through the grille on the side of the front shell can enter the upper chamber and be detected by the first detection unit. Specifically, the control board can drive the first drive circuit to control the first detection unit to perform preliminary detection on the air. When the detection result is normal, the control board does not respond. When the detection result is abnormal, the control board can drive the third drive circuit to start the exhaust fan in the air guide unit to suck the air in the upper chamber into the second detection unit in the middle chamber, and the control board drives the second drive circuit to control the second detection unit to perform further detection on the air. When the detection result is abnormal, the control board can send an air abnormality signal to the alarm device, and the alarm device sends an alarm signal in response to the air abnormality signal. It should be understood that the alarm device can be an external alarm device connected to the control board in the smoke detection device, and the specific connection method can be wired or wireless.

[0048] like Figure 1 As shown, the smoke detection device may also include a first filter 103 and a second filter 105, and both the first filter 103 and the second filter 105 may be disposed in the middle chamber. Specifically, the first filter 103 may be disposed between the first detection unit 102 and the second detection unit 104 to filter large particles in the air, and the second filter 105 may be disposed between the second detection unit 104 and the air intake duct 106 to prevent dust in the air from entering the second detection unit 104 from the exhaust duct 1071 when the exhaust fan 1072 stops working, thereby causing pollution to the interior of the smoke detection device.

[0049] Figure 3 FIG. 1 is a schematic diagram of a first detection unit provided by an exemplary embodiment of the present disclosure. Figure 3 As shown, the first detection unit may include a first detection cavity 301, a single light source transmitting module 302 and a first light source receiving module 303, wherein the single light source transmitting module 302 and the first light source receiving module 303 may both be arranged inside the first detection cavity 301 and located in the same plane, and at the same time, the light source emission center corresponding to the single light source transmitting module 302 and the center position corresponding to the first light receiving module 303 may be located on the same straight line.

[0050] In actual applications, the first light source receiving module 303 may include a first lens 3032 and a first light receiver 3031. The first lens 3032 can be used to converge the light beam emitted by the single light source transmitting module 302, and the first light receiver 3031 can be used to convert the optical signal corresponding to the light beam converged by the first lens 3032 into an electrical signal, and transmit the electrical signal to the control board for analysis and processing.

[0051] Based on this, when the first detection unit is used to detect the air, the single light source transmitting module can emit a fixed power light beam, which can be an infrared light beam. Since there is no obstacle between the single light source transmitting module source and the first lens, the infrared light beam can propagate in a straight line and reach the first lens after a certain attenuation, where the attenuation is caused by particulate matter in the air. Then, it is converged by the first lens and propagated to the first light receiver. Finally, the first light receiver converts the received light signal into an electrical signal and transmits it back to the control board, which analyzes the electrical signal. It should be understood that the center position of the light receiver refers to the center position of the receiving element (such as a photodiode, a photomultiplier tube, etc.) on the geometric structure.

[0052] In practical applications, the first detection unit can be used to determine the first reference light signal C1 in an environment with normal air. When a fire occurs or there is a lot of dust in the air, the light beam emitted by the single light source emission module will be blocked by smoke or dust during propagation, causing the light signal to attenuate. At this time, it can be determined whether the air in the current environment is abnormal air based on the first light signal C2 and the first reference light signal C1 corresponding to the light beam received by the first light receiver in the current environment. It should be understood that the environment corresponding to the air abnormality can be a fire environment, for example, in a fire environment, there will be a lot of smoke in the air, which will cause the light intensity to attenuate; or a sandstorm environment, for example, in a sandstorm environment, there will be a lot of dust in the air, which will cause the light intensity to attenuate.

[0053] Specifically, in an environment with normal air, the optical signal acquired by the first optical receiver will fluctuate within a very small range near C1, and when a fire occurs or there is a lot of dust, the light beam emitted by the single light source transmitting module will be obstructed by smoke or dust, so that C2 received by the first optical receiver is less than C1. Therefore, a preset optical signal difference α0 can be set, and α0 can be an abnormal threshold value actually calibrated by the laboratory, which can be specifically determined based on the physiological tolerance limit of a person and the time for safe evacuation in an environment with abnormal air. Based on this, when C2-C1>=α0, it can be judged that the current air is abnormal. At this time, the second detection unit can further detect the current air; and when C2-C1<α0, the subsequent steps are not continued, but the first detection unit is used to perform cyclic detection according to the above detection method.

[0054] Figure 4 FIG. 1 is a schematic diagram of the structure of a first detection cavity provided by an exemplary embodiment of the present disclosure. Figure 4As shown, the interior of the first detection cavity may be a traditional optical maze structure, and the side of the first detection cavity may have a plurality of evenly distributed grids. Based on this, when the air enters the upper chamber through the grid structure on the side of the front shell, it can enter the first detection cavity through the grid structure on the side of the first detection cavity, and then use the single light source transmitting module and the first light source receiving module inside the first detection cavity to determine whether the air in the current environment is abnormal.

[0055] In some embodiments, when the current air is determined to be abnormal based on the first detection unit, the control panel can drive the exhaust fan to work through the third drive unit, and at the same time, drive the second detection unit to work through the second drive unit. After the exhaust fan works, the air will be sucked into the second detection unit through the first filter. When the air passes through the first filter, smoke particles or dust larger than 1 μm will be filtered out, so that smoke particles or dust smaller than 1 μm enter the second detection unit, and the second detection unit will further detect the filtered air.

[0056] Figure 5 FIG. 1 is a schematic diagram of a second detection unit provided by an exemplary embodiment of the present disclosure. Figure 5 As shown, the second detection unit may include a second detection cavity 501, a dual light source transmitting module 504, a second light source receiving module 502, and a third light source receiving module 503. In a specific setting, the dual light source transmitting module 504, the second light source receiving module 502, and the third light source receiving module 503 may all be arranged inside the second detection cavity and arranged in the same plane. Among them, the dual light source transmitting module 504 may include a first light source transmitter 5041 and a second light source transmitter 5042, the second light source receiving module 502 may be used to receive a light beam emitted by the first light source transmitter 5041, and the third light source receiving module 503 may be used to receive a light beam emitted by the second light source transmitter 5042.

[0057] In some embodiments, the second light source receiving module 502 may include a second lens 5021 and a second light receiver 5022, and the third light source receiving module 503 may include a third lens 5031 and a third light receiver 5032. The light source emission center corresponding to the first light source transmitter 5041 and the lens center corresponding to the second lens 5021 are distributed at an obtuse angle, and the lens center corresponding to the second lens 5021 and the center position corresponding to the second light receiver 5022 are located on the same straight line; the light source emission center corresponding to the second light source transmitter 5042 and the lens center corresponding to the third lens 5031 are distributed at an obtuse angle, and the lens center corresponding to the third lens 5031 and the center position corresponding to the third light receiver 5032 are located on the same straight line. Specifically, the specific angle of the obtuse angle distribution may be 135°.

[0058] Based on this, when the second detection unit is used to detect the air, the first light source transmitter and the second light source transmitter in the dual light source transmitter module can respectively emit different light beams, and according to the principle that light propagates in a straight line, since the light source emission center corresponding to the first light source transmitter and the lens center corresponding to the second lens are distributed at an obtuse angle, and the light source emission center corresponding to the second light source transmitter and the lens center corresponding to the third lens are also distributed at an obtuse angle. Therefore, when there is no smoke or dust in the air, the second light receiver and the third light receiver cannot receive the light beam; when there is smoke or dust in the air, the smoke or dust will hinder the transmission of the light beam and cause the light beam to scatter. In this case, the second light receiver and the third light receiver can receive the scattered light beam.

[0059] For example, the first light source transmitter can emit red light, the second light source transmitter can emit blue light, the second light receiver can be used to receive red light and convert the second light signal corresponding to the red light, the third light receiver can be used to receive blue light and convert the third light signal corresponding to the blue light, at this time, the second lens can be a red light lens for filtering red light, and the third lens can be a blue light lens for filtering blue light. Based on this, when there is smoke or dust in the air, the dual light source transmitter module can emit red light and blue light alternately at intervals of 2ms, and the red light and blue light will be blocked and scattered by smoke or dust during the propagation process. At this time, the red light lens can filter the red light and converge the filtered red light to the second light receiver, and then the second light receiver converts the second light signal corresponding to the red light; and the blue light lens can filter the blue light and converge the filtered blue light to the third light receiver, and then the third light receiver converts the third light signal corresponding to the blue light. Here, after converting the optical signal, a corresponding electrical signal can be obtained, which can then be transmitted to the control board. The control board can analyze the electrical signal to obtain a specific value of the optical signal and a detection result corresponding to the second detection unit.

[0060] In practical applications, the first light source emitter can be controlled to emit red light first, and after the emission time reaches 2ms, the first light source emitter can be turned off, and the second light source emitter can be controlled to emit blue light. Here, one red light and one blue light can be used as a detection cycle. Then, when the number of detection cycles reaches a certain value, the light signals corresponding to different light beams in multiple detection cycles can be analyzed to determine whether the air in the current environment is abnormal.

[0061] For example, taking 20 detection cycles as an example, within 40ms, the values ​​corresponding to 20 red light signals and the values ​​corresponding to 20 blue light signals can be obtained. At this time, the average red light value and the average blue light value can be calculated according to the following formula:

[0062]

[0063] Among them, AVR represents the average value of red light, RR1 represents the value corresponding to red light in the first detection cycle, RR2 represents the value corresponding to red light in the second detection cycle, RR20 represents the value corresponding to red light in the 20th detection cycle, AVB represents the average value of blue light, RB1 represents the value corresponding to blue light in the first detection cycle, RB2 represents the value corresponding to blue light in the second detection cycle, and RB20 represents the value corresponding to blue light in the 20th detection cycle.

[0064] In some embodiments, the second reference light signal δ1 corresponding to red light and the third reference light signal δ2 corresponding to blue light can be determined according to the physiological tolerance limit of a person and the time for safe evacuation in a smoky environment. Based on this, when the average value of red light is greater than or equal to δ1 and / or the average value of blue light is greater than or equal to δ2, it can be determined that the air in the current environment is abnormal air, and the target detection result corresponding to the second detection unit is determined to be an abnormal detection result. When it is determined that the average value of red light is less than δ1 and the average value of blue light is less than δ2, it can be determined that the air in the current environment is normal air.

[0065] Specifically, when AVR>=δ1 and AVB>=δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR>=δ1 and AVB<δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR<δ1 and AVB>=δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR<δ1 and AVB>=δ2, no alarm signal is triggered and no data is reported. At this time, the control board can control the exhaust fan and the second detection unit to stop working until the first detection unit detects air abnormality again, and the exhaust fan and the second detection unit restart the above detection process. It should be understood that in actual applications, when the average value of red light is greater than or equal to δ1, and the average value of blue light is greater than or equal to δ2, it is determined that the degree of air abnormality is serious, and the alarm signal issued can be the highest level; when the average value of red light is greater than or equal to δ1 or the average value of blue light is greater than or equal to δ2, it is determined that the degree of air abnormality is relatively serious, and the alarm signal issued can be the second highest level, and the specific alarm can be a whistle warning, the whistle sound corresponding to the highest level is the loudest, and the whistle sound corresponding to the second highest level is smaller than the whistle sound corresponding to the highest level.

[0066] Figure 6 FIG. 1 is a schematic diagram of the structure of a second detection cavity provided by an exemplary embodiment of the present disclosure. Figure 6As shown, the diameter of black smoke in dust and smoke is usually greater than 1 μm, and the diameter of gray smoke in smoke is usually less than 1 μm. Therefore, the top of the second detection cavity 601 can be designed as a stepped boss for placing the first filter. The first filter can be a micron-level filter for filtering particles larger than 1 μm entering the first detection unit, thereby improving the detection accuracy of the second detection unit. The stepped boss at the upper end of the second detection cavity 601 can cooperate with the upper partition to fix the first filter so that its center position is aligned with several gaps on the upper partition. At the same time, the side of the second detection cavity 601 can be a closed structure that is not light-transmissive or air-permeable. The upper edge is tightly connected to the lower surface of the upper partition, and the radial direction of the air intake duct matches the radial direction of the bottom opening 602 of the second detection cavity, thereby making the bottom of the second detection cavity tightly connected to the air intake duct.

[0067] Figure 7 The present invention is a schematic structural diagram of a connecting buckle provided by an exemplary embodiment of the present invention. Figure 8 FIG. 1 is a layout diagram of a connection buckle provided by an exemplary embodiment of the present disclosure. Figure 7 and Figure 8 As shown, a snap-on design can be used between the front section housing and the middle section housing, and between the middle section housing and the lower section housing. Taking the connection between the front section housing 701 and the middle section housing 702 as an example, the front section housing 701 can have four buckles 703 distributed in a symmetrical array on the circumference, and the middle section housing 702 can have four buckles 704 distributed in a symmetrical array on the circumference, wherein the position of a buckle 703 corresponds to the position of a buckle 704, so that when the front section housing 701 and the middle section housing 702 are installed, the elastic deformation of the buckle 704 can be used so that the buckle 704 can hook the buckle 703, thereby firmly fixing the front section housing 701 and the middle section housing 702. It should be understood that the number of buckles here can be set according to actual conditions, but the number of buckles should be consistent with the number of buckles.

[0068] Based on this, the snap-fit ​​structure provided in the embodiment of the present disclosure can be used to firmly fix the front shell and the middle shell, as well as the middle shell and the lower shell. At the same time, the embodiment of the present disclosure adopts a three-section design for the shell, and the shells are connected by snap-fit ​​connections. In the subsequent cleaning and maintenance of the smoke detector, the filter can be easily replaced by simply plugging and pulling it out, which brings convenience while ensuring the cleaning quality.

[0069] Fig. 9 The following is a flow chart of a smoke detection method provided by an exemplary embodiment of the present disclosure. Fig. 9 As shown, specifically including:

[0070] S901, using the first detection unit to detect the air in the current environment, and when the detection result is abnormal, starting the second detection unit to further detect the air in the current environment.

[0071] In some embodiments, the power supply unit corresponding to the smoke detection device can be turned on to power on the smoke detection device. At this time, the control board can use the first drive unit to drive the first detection unit to work, so that the first detection unit starts periodic cycle detection. When the detection result is abnormal, the control board can drive the third drive circuit to start the exhaust fan in the air guide unit to draw the air in the upper chamber into the second detection unit in the middle chamber, and the control board drives the second drive circuit to control the second detection unit to perform further detection on the air.

[0072] S902, further detecting the air in the current environment using the second detection unit, and sending an air abnormality signal to an alarm device when the detection result is abnormal, and the alarm device sends an alarm signal in response to the air abnormality signal.

[0073] In some embodiments, the control board may drive the second driving circuit to control the second detection unit to further detect the air. When the detection result is abnormal, the control board may send an air abnormality signal to the alarm device, and the alarm device may send an alarm signal in response to the air abnormality signal. It should be understood that the alarm device may be an external alarm device connected to the control board in the smoke detection device, and the specific connection method may be wired or wireless.

[0074] In practical applications, the first detection unit can be a detection device with high sensitivity and strong anti-interference ability, and the second detection unit can be a detection device with high precision. At the same time, a micron-level filter can be arranged between the first detection unit and the second detection unit. In this way, larger smoke particles in the air can be filtered out, thereby more accurately detecting the air. Specifically, the filter can filter out black smoke and dust above 1 μm, thereby ensuring both the sensitivity and accuracy of the detection, and minimizing false alarms and missed alarms. Therefore, it is more applicable to scenarios with many interference factors such as dust and requiring high reliability, such as factories, tobacco warehouses, banks, archives, high-speed trains, containers, roadside houses and other environments.

[0075] Fig.10 This is a schematic diagram of the structure of another smoke detection device provided by an exemplary embodiment of the present disclosure. Fig.10 As shown, including:

[0076] Shell 1001, wherein the shell 1001 may include a front shell 10011, a middle shell 10012 and a lower shell 10013, and the side of the front shell 10011 may be a grille structure, and the middle shell 10012 and the lower shell 10013 may be a closed structure, so that air can enter the smoke detection device through the grille on the front shell 10011, and at the same time, the closed structure can ensure the airtightness of the device during subsequent detection processes.

[0077] The first detection unit 1002 is disposed in the housing 1001 and is used to detect the air in the current environment.

[0078] like Figure 3 As shown, the first detection unit includes a first detection cavity 301, a single light source transmitting module 302 and a first light source receiving module 303. The single light source transmitting module 302 and the first light source receiving module 303 are both arranged inside the first detection cavity 301, and the single light source transmitting module 302 and the first light source receiving module 303 are located in the same plane; wherein, the single light source transmitting module 302 is used to transmit a light beam, and the first light source receiving module 303 is used to receive a light beam.

[0079] The first light source receiving module 303 may include a first lens 3032 and a first light receiver 3031, both of which are arranged on the inner wall of the first detection cavity 301; the first lens 3032 is used to converge the light beam emitted by the single light source transmitting module 302, and the first light receiver 3031 is used to receive the light beam converged by the first lens 3032, and convert the optical signal corresponding to the converged light beam into an electrical signal. Among them, the light source emission center corresponding to the single light source transmitting module 302, the lens center corresponding to the first lens 3032, and the center position corresponding to the first light receiver 3031 are located on the same straight line.

[0080] In practical applications, the first optical receiver can be used to convert the optical signal corresponding to the light beam after the first lens converges into an electrical signal, and transmit the electrical signal to the control board for processing. Based on this, when the first detection unit is used to detect the air, the single light source transmitting module can emit a fixed power light beam, which can be an infrared light beam. Since there is no obstacle between the single light source transmitting module source and the first lens, the infrared light beam can propagate in a straight line and reach the first lens after a certain attenuation. The attenuation here is caused by the particles in the air. Then, it can be converged by the first lens and then propagated to the first optical receiver. Finally, the first optical receiver converts the received optical signal into an electrical signal and transmits it back to the control board. The control board analyzes the electrical signal to determine the detection result corresponding to the first detection unit. It should be understood that when the air is normal, the attenuation is small. When the air is abnormal, that is, when there is smoke or dust, the attenuation will be large.

[0081] The first filter 1003 is disposed in the housing 1001 and located at the bottom of the first detection unit 1002 , and is used to filter the air in the first detection unit 1002 .

[0082] In some embodiments, the first filter can be a micron-level filter. In this way, larger smoke particles in the air can be filtered out, so that the second detection unit can detect the air more accurately. Specifically, the filter can filter out black smoke and dust above 1 μm, which can ensure the sensitivity of the detection and the accuracy of the detection, minimizing false alarms and missed alarms. Based on this, the embodiments of the present disclosure are highly applicable to scenarios with many interference factors such as dust and high reliability requirements, such as factories, tobacco warehouses, banks, archives, high-speed trains, containers, roadside houses and other environments.

[0083] The second detection unit 1004 is disposed in the housing 1001 and located at the bottom of the first filter 1003 , and is used to detect the air filtered by the first filter 1003 .

[0084] like Figure 5 As shown, the second detection unit may include a second detection cavity 501, a dual light source transmitting module 504, a second light source receiving module 502 and a third light source receiving module 503. The dual light source transmitting module 504, the second light source receiving module 502 and the third light source receiving module 503 are all arranged inside the second detection cavity 501, and a hole 505 is provided at the bottom of the second detection cavity 501, which can be used to discharge the air in the second detection cavity.

[0085] The dual light source transmitting module 504 may include a first light source transmitter 5041 and a second light source transmitter 5042, and the first light source transmitter 5041 and the second light source transmitter 5042 are connected in parallel; the second light source receiving module 502 is used to receive the light beam emitted by the first light source transmitter 5041, and the third light source receiving module 503 is used to receive the light beam emitted by the second light source transmitter 5042. The second light source receiving module 502 includes a second lens 5021 and a second light receiver 5022, and the third light source receiving module 503 includes a third lens 5031 and a third light receiver 5032; the light source transmitting center corresponding to the first light source transmitter 5041 and the lens center corresponding to the second lens 5021 are distributed at an obtuse angle, and the lens center corresponding to the second lens 5021 and the center position corresponding to the second light receiver are located on the same straight line.

[0086] In practical applications, the light source emission center corresponding to the second light source transmitter 5042 and the lens center corresponding to the third lens 5031 are distributed at an obtuse angle, and the lens center corresponding to the third lens 5031 and the center position corresponding to the third light receiver 5032 are located on the same straight line. Specifically, the specific angle of the obtuse angle distribution can be 135°, and other angles can also be used in specific settings.

[0087] Based on this, when the second detection unit is used to detect the air, the first light source transmitter and the second light source transmitter in the dual light source transmitter module can respectively emit different light beams, and according to the principle that light propagates in a straight line, since the light source emission center corresponding to the first light source transmitter and the lens center corresponding to the second lens are distributed at an obtuse angle, and the light source emission center corresponding to the second light source transmitter and the lens center corresponding to the third lens are also distributed at an obtuse angle. Therefore, when there is no smoke or dust in the air, the second light receiver and the third light receiver cannot receive the light beam; when there is smoke or dust in the air, the smoke or dust will hinder the transmission of the light beam and cause the light beam to scatter. In this case, the second light receiver and the third light receiver can receive the scattered light beam.

[0088] For example, the first light source transmitter can emit red light, the second light source transmitter can emit blue light, the second light receiver can be used to receive red light and convert the second light signal corresponding to the red light, the third light receiver can be used to receive blue light and convert the third light signal corresponding to the blue light, at this time, the second lens can be a red light lens for filtering red light, and the third lens can be a blue light lens for filtering blue light. Based on this, when there is smoke or dust in the air, the dual light source transmitter module can emit red light and blue light alternately at intervals of 2ms, and the red light and blue light will be blocked and scattered by smoke or dust during the propagation process. At this time, the red light lens can filter the red light and converge the filtered red light to the second light receiver, and then the second light receiver converts the second light signal corresponding to the red light; and the blue light lens can filter the blue light and converge the filtered blue light to the third light receiver, and then the third light receiver converts the third light signal corresponding to the blue light. Here, after converting the optical signal, a corresponding electrical signal can be obtained, and then the electrical signal can be transmitted to the control board. The control board can analyze the electrical signal to obtain the detection result corresponding to the second detection unit.

[0089] The air guiding unit 1007 is arranged in the shell 1001 and located at the bottom of the second detection unit 1004, and is used to introduce the air in the first detection unit 1002 into the second detection unit 1004, wherein the air guiding unit 1007 includes an exhaust duct 10071 and an exhaust fan 10072, and the exhaust fan 10072 is arranged in the exhaust duct 10071, and is used to introduce the air in the first detection unit 1002 into the second detection unit 1004.

[0090] In some embodiments, the exhaust fan in the embodiment of the present disclosure is a fan with controllable start and stop, which generates a certain suction force when working and can greatly reduce the adsorption of dust and smoke particles; at the same time, the final detection result is determined by the second detection unit, and the dust in the air entering the smoke detector of the embodiment of the present disclosure will be filtered by the filter, and only gray smoke can enter its detection space, which can physically eliminate the problem of particle adhesion.

[0091] The smoke detection device may further include a second filter 1005 and an air intake duct 1006. The second filter 1005 is arranged at the bottom of the second detection unit 1004 and at the air inlet portion of the air intake duct 1006. The air intake duct 1006 is connected to the air guide unit 1007. The second filter 1005 is used to filter the air entering the second detection unit 1004, and the air intake duct 1006 is used to transport air.

[0092] In the specific setting, the axial direction of the air guide unit can be perpendicular to the axial direction of the air intake duct, and the central axis of the exhaust fan can be parallel to the axial direction of the air intake duct, so as to discharge the air inside the smoke detection device and to draw the air in the upper chamber into the middle chamber. At the same time, the second filter can be arranged between the second detection unit and the air intake duct, so as to prevent dust in the air from entering the second detection unit from the air guide unit when the fan stops working, thereby polluting the interior of the smoke detection device.

[0093] Based on this, the embodiment of the present disclosure provides a smoke detection device, which mainly includes a first detection unit, a second detection unit, a filter and an air guide unit. In specific use, the first detection unit can be used to detect the air in the current environment and obtain a first detection result. When the first detection result is abnormal, the air guide unit is started to introduce the air in the first detection unit into the second detection unit, and the second detection unit further detects the air, and then sends an alarm signal when the second detection result is also abnormal. Based on this, while ensuring the detection sensitivity, the false alarm and missed alarm problems of the smoke detector can be solved, thereby improving the accuracy of smoke detection.

[0094] In practical applications, the first detection unit can be a detection device with high sensitivity and strong anti-interference ability, and the second detection unit can be a detection device with high precision. At the same time, a micron-level filter can be set between the first detection unit and the second detection unit, so that larger smoke particles in the air can be filtered out, so that the second detection unit can detect the air more accurately. Specifically, the filter can filter out black smoke and dust above 1μm, which can ensure the sensitivity of the detection and the accuracy of the detection, and minimize false alarms and missed alarms. Based on this, the embodiment of the present disclosure is highly applicable to scenes with many interference factors such as dust and high reliability, such as factories, tobacco warehouses, banks, archives, high-speed trains, containers, roadside houses and other environments.

[0095] The smoke detection method provided by the embodiment of the present disclosure may be executed by a terminal or by a chip applied to the terminal.

[0096] Exemplarily, the above-mentioned terminals may include one or more of mobile phones, tablet computers, wearable devices, vehicle-mounted devices, laptop computers, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), and wearable devices based on augmented reality (AR) and / or virtual reality (VR) technology, and may also include but not be limited to remote control devices, wearable devices, street lamps, home appliances and other smart terminals, which are not specifically limited in the embodiments of the present disclosure.

[0097] Fig.11 FIG. 1 is a flow chart of another smoke detection method provided by an exemplary embodiment of the present disclosure. Fig.11 As shown, a smoke detection device applied to an embodiment of the present disclosure includes a housing, a first detection unit, a first filter, a second detection unit and an air guide unit. The method includes: specifically including:

[0098] S1101, use a first detection unit to detect the air in the current environment to obtain a detection result corresponding to the first detection unit.

[0099] In some embodiments, when the smoke detection device is used to detect the air, the power supply unit can be turned on to power the smoke detection device so that the smoke detection device can work. At this time, the air entering the smoke detection device through the grille on the side of the front shell can enter the upper chamber and be detected by the first detection unit, and then the detection result obtained by the first detection unit after detecting the air in the current environment can be obtained. Specifically, the control board can drive the first drive circuit to control the first detection unit to perform preliminary detection on the air. When the detection result is normal, the control board does not respond, and when the detection result is an abnormal detection result, the second detection unit is used to further detect the air.

[0100] S1102, when the detection result corresponding to the first detection unit is an abnormal detection result, the air in the first detection unit is introduced into the second detection unit through the first filter by using the air guide unit, and the filtered air is detected by the second detection unit to obtain the target detection result.

[0101] In some embodiments, when the detection result corresponding to the first detection unit is an abnormal detection result, the control board can drive the third drive circuit to start the exhaust fan in the air guide unit to suck the air in the upper chamber into the second detection unit in the middle chamber, and the control board drives the second drive circuit to control the second detection unit to perform further detection on the air to obtain the target detection result, and when the target detection result is also abnormal, the control board can send an air abnormality signal to the alarm device, and the alarm device sends an alarm signal in response to the air abnormality signal. It should be understood that the alarm device can be an external alarm device connected to the control board in the smoke detection device, and the specific connection method can be wired or wireless.

[0102] In some embodiments, the first detection unit includes a first detection cavity, a single light source transmitting module and a first light source receiving module, and the method further includes:

[0103] When the air in the environment is normal, obtain a first reference light signal corresponding to when the first light source receiving module receives the first light beam emitted by the single light source transmitting module; in the current environment, control the single light source transmitting module to emit a second light beam, and when the first light source receiving module receives the second light beam, determine the first light signal corresponding to the second light beam; when the light signal difference between the first light signal and the first reference light signal is greater than or equal to the preset light signal difference, determine that the detection result corresponding to the first detection unit is an abnormal detection result.

[0104] In some embodiments,

[0105] When the first detection unit is used to detect the air, the single light source transmitting module can emit a fixed power light beam, which can be an infrared light beam. Since there is no obstacle between the single light source transmitting module source and the first lens, the infrared light beam can propagate in a straight line and reach the first lens after a certain attenuation, where the attenuation is caused by particulate matter in the air. Then, the infrared light beam converges through the first lens and propagates to the first light receiver. Finally, the first light receiver converts the received light signal into an electrical signal and transmits it back to the control board, which analyzes the electrical signal. It should be understood that the center position of the light receiver refers to the center position of the receiving element (such as a photodiode, a photomultiplier tube, etc.) on the geometric structure.

[0106] In practical applications, the first detection unit can be used to determine the first reference light signal C1 in an environment with normal air. When a fire occurs or there is a lot of dust in the air, the light beam emitted by the single light source emission module will be blocked by smoke or dust during propagation, causing the light signal to attenuate. At this time, it can be determined whether the air in the current environment is abnormal air based on the first light signal C2 and the first reference light signal C1 corresponding to the light beam received by the first light receiver in the current environment. It should be understood that the environment corresponding to the air abnormality can be a fire environment, for example, in a fire environment, there will be a lot of smoke in the air, which will cause the light intensity to attenuate; or a sandstorm environment, for example, in a sandstorm environment, there will be a lot of dust in the air, which will cause the light intensity to attenuate.

[0107] Specifically, in an environment with normal air, the optical signal acquired by the first optical receiver will fluctuate within a very small range near C1, and when a fire occurs or there is a lot of dust, the light beam emitted by the single light source transmitting module will be obstructed by smoke or dust, so that C2 received by the first optical receiver is less than C1. Therefore, a preset optical signal difference α0 can be set, and α0 can be an abnormal threshold value actually calibrated by the laboratory, which can be specifically determined based on the physiological tolerance limit of a person and the time for safe evacuation in an environment with abnormal air. Based on this, when C2-C1>=α0, it can be judged that the current air is abnormal. At this time, the second detection unit can further detect the current air; and when C2-C1<α0, the subsequent steps are not continued, but the first detection unit is used to perform cyclic detection according to the above detection method.

[0108] In some embodiments, the second detection unit includes a second detection cavity, a dual light source transmitting module, a second light source receiving module and a third light source receiving module, wherein the dual light source transmitting module includes a first light source transmitter and a second light source transmitter, and the method further includes:

[0109] In the current environment, the first light source emitter and the second light source emitter are controlled to alternately emit light beams. When the number of light beams reaches a preset number, multiple second light signals are determined by the second light source receiving module, and multiple third light signals are determined by the third light source receiving module; an average value of the first light signal is determined based on the multiple second light signals, and an average value of the second light signal is determined based on the multiple third light signals; when the average value of the first light signal is greater than or equal to the second reference light signal, and / or the average value of the second light signal is greater than or equal to the third reference light signal, the detection result corresponding to the second detection unit is determined to be an abnormal detection result.

[0110] In some embodiments, when the air is detected by the second detection unit, the first light source transmitter and the second light source transmitter in the dual light source transmission module can respectively emit different light beams, and according to the principle that light propagates in a straight line, since the light source emission center corresponding to the first light source transmitter and the lens center corresponding to the second lens are distributed at an obtuse angle, and the light source emission center corresponding to the second light source transmitter and the lens center corresponding to the third lens are also distributed at an obtuse angle. Therefore, when there is no smoke or dust in the air, the second light receiver and the third light receiver cannot receive the light beam; when there is smoke or dust in the air, the smoke or dust will hinder the transmission of the light beam and cause the light beam to scatter. In this case, the second light receiver and the third light receiver can receive the scattered light beam.

[0111] For example, the first light source transmitter can emit red light, the second light source transmitter can emit blue light, the second light receiver can be used to receive red light and convert the second light signal corresponding to the red light, the third light receiver can be used to receive blue light and convert the third light signal corresponding to the blue light, at this time, the second lens can be a red light lens for filtering red light, and the third lens can be a blue light lens for filtering blue light. Based on this, when there is smoke or dust in the air, the dual light source transmitter module can emit red light and blue light alternately at intervals of 2ms, and the red light and blue light will be blocked and scattered by smoke or dust during the propagation process. At this time, the red light lens can filter the red light and converge the filtered red light to the second light receiver, and then the second light receiver converts the second light signal corresponding to the red light; and the blue light lens can filter the blue light and converge the filtered blue light to the third light receiver, and then the third light receiver converts the third light signal corresponding to the blue light. Here, after converting the optical signal, a corresponding electrical signal can be obtained, which can then be transmitted to the control board. The control board can analyze the electrical signal to obtain a specific value of the optical signal and a detection result corresponding to the second detection unit.

[0112] In practical applications, the first light source emitter can be controlled to emit red light first, and after the emission time reaches 2ms, the first light source emitter can be turned off, and the second light source emitter can be controlled to emit blue light. Here, one red light and one blue light can be used as a detection cycle. Then, when the number of detection cycles reaches a certain value, the light signals corresponding to different light beams in multiple detection cycles can be analyzed to determine whether the air in the current environment is abnormal.

[0113] For example, taking 20 detection cycles as an example, within 40ms, the values ​​corresponding to 20 red light signals and the values ​​corresponding to 20 blue light signals can be obtained. At this time, the average red light value and the average blue light value can be calculated according to the following formula:

[0114]

[0115] Among them, AVR represents the average value of red light, RR1 represents the value corresponding to red light in the first detection cycle, RR2 represents the value corresponding to red light in the second detection cycle, RR20 represents the value corresponding to red light in the 20th detection cycle, AVB represents the average value of blue light, RB1 represents the value corresponding to blue light in the first detection cycle, RB2 represents the value corresponding to blue light in the second detection cycle, and RB20 represents the value corresponding to blue light in the 20th detection cycle.

[0116] In some embodiments, the second reference light signal δ1 corresponding to red light and the third reference light signal δ2 corresponding to blue light can be determined according to the physiological tolerance limit of a person and the time for safe evacuation in a smoky environment. Based on this, when the average value of red light is greater than or equal to δ1 and / or the average value of blue light is greater than or equal to δ2, it can be determined that the air in the current environment is abnormal air, and when it is determined that the average value of red light is less than δ1 and the average value of blue light is less than δ2, it can be determined that the air in the current environment is normal air.

[0117] Specifically, when AVR>=δ1 and AVB>=δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR>=δ1 and AVB<δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR<δ1 and AVB>=δ2, an alarm signal is issued, and the AVR and AVB data are reported to the designated IoT device; when AVR<δ1 and AVB>=δ2, no alarm signal is triggered and no data is reported. At this time, the control board can control the exhaust fan and the second detection unit to stop working until the first detection unit detects air abnormality again, and the exhaust fan and the second detection unit restart the above detection process. It should be understood that in actual applications, when the average value of red light is greater than or equal to δ1, and the average value of blue light is greater than or equal to δ2, it is determined that the degree of air abnormality is serious, and the alarm signal issued can be the highest level; when the average value of red light is greater than or equal to δ1 or the average value of blue light is greater than or equal to δ2, it is determined that the degree of air abnormality is relatively serious, and the alarm signal issued can be the second highest level, and the specific alarm can be a whistle warning, the whistle sound corresponding to the highest level is the loudest, and the whistle sound corresponding to the second highest level is smaller than the whistle sound corresponding to the highest level.

[0118] In practical applications, the first detection unit can be a detection device with high sensitivity and strong anti-interference ability, and the second detection unit can be a detection device with high precision. At the same time, a micron-level filter can be arranged between the two detection units, so that when the air enters the second detection unit, black smoke and dust above 1μm can be filtered out. This can not only ensure the cleanliness of the second detection cavity of the second detection unit, but also ensure the detection accuracy and detection sensitivity of the smoke detector.

[0119] At the same time, the disclosed embodiment, combined with the average value algorithm, can ensure the sensitivity of smoke or dust detection in the air, while also ensuring the accuracy of detection, minimizing false alarms and missed alarms, and is particularly suitable for scenarios with many interference factors such as dust and requiring high reliability, such as factories, tobacco warehouses, banks, archives, high-speed trains, containers, roadside houses, etc.

[0120] The above mainly introduces the solution provided by the embodiment of the present disclosure from the perspective of the server. It is understandable that, in order to implement the above functions, the server includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0121] The embodiments of the present disclosure may divide the server into functional units according to the above method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one management module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0122] In the case of dividing each functional module according to each function, an exemplary embodiment of the present disclosure provides a smoke detection device, which may be a server or a chip applied to a server. Fig.12 The structural diagram of another smoke detection device provided by an exemplary embodiment of the present disclosure is as follows. Fig.12 As shown, the smoke detection device 1200 includes:

[0123] The first detection module 1201 is used to detect the air in the current environment using the first detection unit to obtain a detection result corresponding to the first detection unit;

[0124] The second detection module 1202 is used to use the air guide unit to introduce the air in the first detection unit into the second detection unit through the first filter when the detection result corresponding to the first detection unit is an abnormal detection result, and use the second detection unit to detect the filtered air to obtain a target detection result.

[0125] In an optional manner, the first detection unit includes a first detection cavity, a single light source transmitting module and a first light source receiving module, and the first detection module 1201 is also used to obtain a first reference light signal corresponding to when the first light source receiving module receives the first light beam emitted by the single light source transmitting module when the air in the environment is normal; in the current environment, control the single light source transmitting module to emit a second light beam, and determine the first light signal corresponding to the second light beam when the first light source receiving module receives the second light beam; and when the light signal difference between the first light signal and the first reference light signal is greater than or equal to a preset light signal difference, determine that the detection result corresponding to the first detection unit is an abnormal detection result.

[0126] In an optional manner, the second detection unit includes a second detection cavity, a dual light source transmitting module, a second light source receiving module and a third light source receiving module, wherein the dual light source transmitting module includes a first light source transmitter and a second light source transmitter, and the first detection module 1202 is also used to control the first light source transmitter and the second light source transmitter to alternately emit light beams in the current environment, and when the number of the light beams reaches a preset number, a plurality of second light signals are determined by the second light source receiving module, and a plurality of third light signals are determined by the third light source receiving module; an average value of the first light signal is determined according to the plurality of the second light signals, and an average value of the second light signal is determined according to the plurality of the third light signals; when the average value of the first light signal is greater than or equal to the second reference light signal, and / or the average value of the second light signal is greater than or equal to the third reference light signal, the detection result corresponding to the second detection unit is determined to be an abnormal detection result.

[0127] An embodiment of the present disclosure also provides an electronic device, comprising: at least one processor; a memory for storing instructions executable by at least one processor; wherein the at least one processor is used to execute instructions to implement the steps of the above method disclosed in the embodiment of the present disclosure.

[0128] Fig.13 The structure diagram of an electronic device provided by an exemplary embodiment of the present disclosure is shown in FIG. Fig.13 As shown, the electronic device 1300 includes at least one processor 1301 and a memory 1302 coupled to the processor 1301 , and the processor 1301 can execute corresponding steps in the above method disclosed in the embodiment of the present disclosure.

[0129] The processor 1301 may also be referred to as a central processing unit (CPU), which may be an integrated circuit chip having signal processing capabilities. Each step in the method disclosed in the embodiment of the present disclosure may be completed by an integrated logic circuit of hardware in the processor 1301 or by instructions in the form of software. The processor 1301 may be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present disclosure may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a memory 1302, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, or other mature storage media in the art. The processor 1301 reads the information in the memory 1302 and completes the steps of the method in combination with its hardware.

[0130] In addition, when various operations / processes according to the present disclosure are implemented by software and / or firmware, they can be transmitted from a storage medium or a network to a computer system having a dedicated hardware structure, for example, Fig.11 The computer system 1100 shown installs the programs constituting the software, and when the various programs are installed, the computer system can execute various functions, including the functions described above. Fig.14 A schematic diagram of the structure of a computer system provided by an exemplary embodiment of the present disclosure.

[0131] Computer system 1400 is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0132] like Fig.14As shown, the computer system 1400 includes a computing unit 1401, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 1402 or a computer program loaded from a storage unit 1408 to a random access memory (RAM) 1403. In the RAM 1403, various programs and data required for the operation of the computer system 1400 can also be stored. The computing unit 1401, the ROM 1402, and the RAM 1403 are connected to each other via a bus 1404. An input / output (I / O) interface 1405 is also connected to the bus 1404.

[0133] A plurality of components in the computer system 1400 are connected to the I / O interface 1405, including: an input unit 1406, an output unit 1407, a storage unit 1408, and a communication unit 1409. The input unit 1406 may be any type of device capable of inputting information to the computer system 1400, and the input unit 1406 may receive input digital or character information, and generate key signal inputs related to user settings and / or function control of the electronic device. The output unit 1407 may be any type of device capable of presenting information, and may include, but is not limited to, a display, a speaker, a video / audio output terminal, a vibrator, and / or a printer. The storage unit 1408 may include, but is not limited to, a disk, an optical disk. The communication unit 1409 allows the computer system 1400 to exchange information / data with other devices over a network such as the Internet, and may include, but is not limited to, a modem, a network card, an infrared communication device, a wireless communication transceiver, and / or a chipset, for example, a Bluetooth™ device, a WiFi device, a WiMax device, a cellular communication device, and / or the like.

[0134] The computing unit 1401 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 1401 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 1401 performs the various methods and processes described above. For example, in some embodiments, the above methods disclosed in the embodiments of the present disclosure may be implemented as a computer software program, which is tangibly included in a machine-readable medium, such as a storage unit 1408. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 1402 and / or communication unit 1409. In some embodiments, the computing unit 1401 may be configured to perform the above methods disclosed in the embodiments of the present disclosure in any other appropriate manner (e.g., by means of firmware).

[0135] The embodiment of the present disclosure also provides a computer-readable storage medium, wherein when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the above method disclosed in the embodiment of the present disclosure.

[0136] The computer-readable storage medium in the disclosed embodiments may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. The computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. More specifically, the computer-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0137] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0138] Fig.15 Schematic diagram of a computer program product provided by an exemplary embodiment of the present disclosure. Fig.15 As shown, the computer program product 1500 includes a computer program 1501, wherein the computer program 1501 implements the above method disclosed in the embodiment of the present disclosure when executed by a processor.

[0139] In embodiments of the present disclosure, computer program codes for performing the operations of the present disclosure may be written in one or more programming languages ​​or combinations thereof, including but not limited to object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer.

[0140] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0141] The modules, components or units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the names of the modules, components or units do not, in some cases, limit the modules, components or units themselves.

[0142] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chip (SOCs), complex programmable logic devices (CPLDs), and the like.

[0143] The above descriptions are only some embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, a technical solution formed by replacing the above features with the technical features with similar functions disclosed in the present disclosure (but not limited to).

[0144] Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A smoke detection device, characterized in that: include: case; A first detection unit, disposed in the housing, for detecting the air in the current environment; a first filter, disposed in the housing and located at the bottom of the first detection unit, for filtering the air in the first detection unit; A second detection unit is disposed in the housing and located at the bottom of the first filter, and is used to detect the air filtered by the first filter; An air guiding unit is arranged in the housing and located at the bottom of the second detection unit, and is used for introducing the air in the first detection unit into the second detection unit.

2. The smoke detection device according to claim 1, characterized in that: The first detection unit includes a first detection cavity, a single light source transmitting module and a first light source receiving module, the single light source transmitting module and the first light source receiving module are both arranged inside the first detection cavity, and the single light source transmitting module and the first light source receiving module are located in the same plane; The single light source transmitting module is used to transmit a light beam, and the first light source receiving module is used to receive the light beam.

3. The smoke detection device according to claim 2, characterized in that: The first light source receiving module includes a first lens and a first light receiver, and the first lens and the first light receiver are both arranged on the inner side wall of the first detection cavity; The first lens is used to converge the light beam emitted by the single light source emission module, and the first light receiver is used to receive the light beam converged by the first lens and convert the optical signal corresponding to the converged light beam into an electrical signal.

4. The smoke detection device according to claim 3, characterized in that: The light source emission center corresponding to the single light source emission module, the lens center corresponding to the first lens and the center position corresponding to the first light receiver are located on the same straight line.

5. The smoke detection device according to claim 1, characterized in that: The second detection unit includes a second detection cavity, a dual light source transmitting module, a second light source receiving module and a third light source receiving module, and the dual light source transmitting module, the second light source receiving module and the third light source receiving module are all arranged inside the second detection cavity.

6. The smoke detection device according to claim 5, characterized in that: The dual light source emission module comprises a first light source emitter and a second light source emitter, wherein the first light source emitter and the second light source emitter are connected in parallel; The second light source receiving module is used to receive the light beam emitted by the first light source emitter, and the third light source receiving module is used to receive the light beam emitted by the second light source emitter.

7. The smoke detection device according to claim 6, characterized in that: The second light source receiving module includes a second lens and a second light receiver, and the third light source receiving module includes a third lens and a third light receiver; The light source emission center corresponding to the first light source transmitter and the lens center corresponding to the second lens are distributed at an obtuse angle, and the lens center corresponding to the second lens and the center position corresponding to the second light receiver are located on the same straight line; The light source emission center corresponding to the second light source transmitter and the lens center corresponding to the third lens are distributed at an obtuse angle, and the lens center corresponding to the third lens and the center position corresponding to the third light receiver are located on the same straight line.

8. The smoke detection device according to claim 1, characterized in that: The air guiding unit includes an exhaust duct and an exhaust fan. The exhaust fan is disposed in the exhaust duct and is used to introduce the air in the first detection unit into the second detection unit.

9. The smoke detection device according to claim 1, characterized in that: The smoke detection device further includes a second filter and an air intake duct, wherein the second filter is arranged at the bottom of the second detection unit and at the air intake portion of the air intake duct, and the air intake duct is connected to the air guide unit; The second filter is used to filter the air entering the second detection unit, and the air intake duct is used to transport the air.

10. A smoke detection method, characterized in that: Applied to the smoke detection device according to any one of claims 1 to 9, the smoke detection device comprises a housing, a first detection unit, a first filter, a second detection unit and an air guide unit, the method comprises: Using the first detection unit to detect the air in the current environment, and obtaining a detection result corresponding to the first detection unit; When the detection result corresponding to the first detection unit is an abnormal detection result, the air in the first detection unit is introduced into the second detection unit through the first filter by using the air guide unit, and the filtered air is detected by using the second detection unit to obtain the target detection result.

11. The method according to claim 10, characterized in that The first detection unit includes a first detection cavity, a single light source transmitting module and a first light source receiving module, and the method further includes: When the air in the environment is normal, obtaining a first reference light signal corresponding to when the first light source receiving module receives the first light beam emitted by the single light source transmitting module; In the current environment, controlling the single light source transmitting module to transmit a second light beam, and determining a first light signal corresponding to the second light beam when the first light source receiving module receives the second light beam; In a case where the optical signal difference between the first optical signal and the first reference optical signal is greater than or equal to a preset optical signal difference, it is determined that the detection result corresponding to the first detection unit is an abnormal detection result.

12. The method according to claim 10, characterized in that The second detection unit includes a second detection cavity, a dual light source transmitting module, a second light source receiving module and a third light source receiving module, wherein the dual light source transmitting module includes a first light source transmitter and a second light source transmitter, and the method further includes: In the current environment, the first light source transmitter and the second light source transmitter are controlled to alternately transmit light beams, and when the number of the light beams reaches a preset number, a plurality of second light signals are determined by the second light source receiving module, and a plurality of third light signals are determined by the third light source receiving module; determining an average value of the first optical signal according to the plurality of the second optical signals, and determining an average value of the second optical signal according to the plurality of the third optical signals; When the average value of the first optical signal is greater than or equal to the second reference optical signal, and / or the average value of the second optical signal is greater than or equal to the third reference optical signal, it is determined that the detection result corresponding to the second detection unit is an abnormal detection result.

13. A smoke detection device, characterized in that: Applied to the smoke detection method according to any one of claims 10 to 12, the device comprises: A first detection module, used to detect the air in the current environment using the first detection unit to obtain a detection result corresponding to the first detection unit; The second detection module is used to use the air guide unit to introduce the air in the first detection unit into the second detection unit through the first filter net when the detection result corresponding to the first detection unit is an abnormal detection result, and use the second detection unit to detect the filtered air to obtain a detection result.

14. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 10 to 12.

15. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 10 to 12 are implemented.

16. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 10 to 12 are implemented.

Images