Smoke concentration measurement method, system, computing device and storage medium

Abstract

Embodiments of this specification provide a smoke concentration measurement method, system, computing device, and storage medium. The smoke concentration measurement method includes: a light intensity detector that receives light currently passing through a polarization unit and a smoke container, determines the light's current intensity, and transmits the current intensity to a smoke concentration calculation terminal; the smoke concentration calculation terminal calculates the light's polarization degree based on the current intensity and reference intensity information, where the reference intensity is the light intensity detected by the light intensity detector when no smoke is present in the smoke container; and the smoke concentration calculation terminal determines the current smoke concentration based on the polarization of the light. The polarization characteristics of light are utilized to detect smoke concentration. Since light polarization is an inherent property of the light wave and is determined by the light wave itself, it is unaffected by ambient light or particulate matter in the smoke, thereby ensuring the accuracy and stability of the calculated smoke concentration.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of computer technology, and in particular to a smoke concentration measurement method, system, computing device, and storage medium. Background Art

[0002] Fires typically produce large amounts of smoke. Therefore, to ensure fire safety, smoke sensors are installed indoors. Once smoke is detected, these sensors trigger a fire warning system to alert the fire and prevent the fire from spreading further. Currently, optical scattering is commonly used to detect smoke concentration, and the presence of a fire is determined based on the detected smoke concentration.

[0003] However, due to the different size distribution of particles in smoke, the particles in smoke produced by different combustion materials are also different, and different indoor areas are exposed to different ambient light. The ambient light and particles in the smoke will affect the detection of smoke concentration, resulting in a lack of accuracy and stability in the measurement results. Therefore, an effective technical solution is urgently needed to solve the above problems. Summary of the Invention

[0004] In light of this, embodiments of this specification provide a smoke concentration measurement method. One or more embodiments of this specification also relate to a smoke concentration measurement system, a computing device, a computer-readable storage medium, and a computer program product to address the technical shortcomings of existing technologies, such as the lack of accuracy and stability in smoke concentration measurement results.

[0005] According to a first aspect of an embodiment of this specification, a smoke concentration measurement method is provided, which is applied to a smoke concentration measurement system. The smoke concentration measurement system includes a smoke concentration measurement device and a smoke concentration calculation terminal. The smoke concentration measurement device includes a light source, a polarization unit, a smoke container, and a light intensity detector. Light emitted by the light source passes through the polarization unit and the smoke container to reach the light intensity detector. The method includes:

[0006] The light intensity detector receives the light currently passing through the polarization unit and the smoke container, determines current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculation end;

[0007] The smoke concentration calculation end calculates the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container;

[0008] The smoke concentration calculation end determines the smoke concentration at the current moment according to the polarization degree of the light.

[0009] According to a second aspect of the embodiments of this specification, a smoke concentration measurement system is provided. The smoke concentration measurement system includes a smoke concentration measurement device and a smoke concentration calculation terminal. The smoke concentration measurement device includes a light source, a polarization unit, a smoke container, and a light intensity detector. Light emitted by the light source passes through the polarization unit and the smoke container to reach the light intensity detector.

[0010] The light intensity detector receives the light currently passing through the polarization unit and the smoke container, determines current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculation end;

[0011] The smoke concentration calculation end is configured to calculate the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container;

[0012] The smoke concentration calculation end is further configured to determine the smoke concentration at the current moment according to the polarization degree of the light.

[0013] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0014] memory and processor;

[0015] The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions. When the computer programs / instructions are executed by the processor, the steps of the above method are implemented.

[0016] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores a computer program / instruction, and the computer program / instruction implements the steps of the above method when executed by a processor.

[0017] According to a fifth aspect of the embodiments of this specification, a computer program product is provided, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0018] In one embodiment of the present specification, a smoke concentration measuring device and a smoke concentration calculating end are provided. The light source of the smoke concentration measuring device emits light which passes through a polarization unit and a smoke container to reach a light intensity detector. The light intensity detector receives the light at the current moment, determines the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculating end. The smoke concentration calculating end calculates the polarization degree of the light based on the current light intensity information and the reference light intensity information, and determines the smoke concentration at the current moment based on the polarization degree. By providing a polarization unit and utilizing the polarization characteristics of the light, the smoke concentration can be detected. Since the polarization of light is an inherent property of the light wave itself and is determined by the light wave itself, it will not be affected by the ambient light and particulate matter in the smoke, thereby ensuring the accuracy and stability of the calculated smoke concentration result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an application scenario of a smoke concentration measurement method provided by an embodiment of this specification;

[0020] Figure 2 This is a flow chart of a smoke concentration measurement method provided by one embodiment of this specification;

[0021] Figure 3 This is a schematic structural diagram of a smoke concentration measuring device in a smoke concentration measuring method provided in one embodiment of this specification;

[0022] Figure 4 This is a process flow chart of a smoke concentration measurement method provided in one embodiment of this specification;

[0023] Figure 5 This is a schematic structural diagram of a smoke concentration measurement system provided by an embodiment of this specification;

[0024] Figure 6 This is a structural block diagram of a computing device provided by one embodiment of this specification. DETAILED DESCRIPTION

[0025] The following description sets forth many specific details to facilitate a thorough understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of this specification. Therefore, this specification is not limited to the specific implementations disclosed below.

[0026] The terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of this specification. The singular forms "a," "the," and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0027] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0028] In addition, it should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in one or more embodiments of this specification are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0029] First, the terms involved in one or more embodiments of this specification are explained.

[0030] Scattering depolarization, also known as the depolarization effect, is a phenomenon related to the change in polarization state of light as it propagates through a medium. Scattering depolarization is a process in which light's polarization state changes due to multiple scattering within a medium. During this process, the polarization state of light undergoes an irreversible change, causing fully polarized light to become partially polarized.

[0031] Completely linearly polarized light refers to light whose light vector (i.e., the electric field vector of light) vibrates in a fixed direction, and over time, this vibration vector changes only in magnitude, not direction. Completely horizontally polarized light is linearly polarized light whose vibration direction is horizontal.

[0032] Partially polarized light: polarized light obtained by superimposing fully polarized light and non-polarized light. In the plane perpendicular to the direction of light propagation, there is light vibration in all directions but with different amplitudes.

[0033] Fully polarized light: includes linearly polarized light, circularly polarized light, and elliptically polarized light, which can be equivalent to two linearly polarized light beams with a constant phase difference, the same vibration frequency, and perpendicular vibration directions.

[0034] Unpolarized light: It can be understood as natural light. It is a kind of light wave that vibrates in all directions in a plane perpendicular to the direction of light propagation during propagation, and the amplitude of the light vector in each direction is equal.

[0035] In this specification, a smoke concentration measurement method is provided. This specification also relates to a smoke concentration measurement system, a computing device, a computer-readable storage medium, and a computer program product, which are described in detail one by one in the following embodiments.

[0036] See also Figure 1 , Figure 1 A schematic diagram of an application scenario of a smoke concentration measurement method provided according to an embodiment of this specification is shown.

[0037] Figure 1 The smoke concentration measuring device 102 and the smoke concentration calculating terminal 104 are included.

[0038] In a specific implementation, the smoke concentration measurement device 102 can be installed indoors, such as in a shopping mall, and can be used to detect whether a fire has occurred in the mall. The light source in the smoke concentration measurement device 102 can emit light. The light passes through a polarization unit and a smoke container before reaching a light intensity detector. The light intensity detector detects the current light intensity information of the light and sends this current light intensity information to the smoke concentration calculation terminal 104. The smoke concentration calculation terminal 104 calculates the polarization degree of the light at the current moment based on this current light intensity information and reference light intensity information. Based on this polarization degree, it determines the current smoke concentration, thereby determining whether a fire has occurred based on the smoke concentration.

[0039] The smoke concentration calculation end 104 can be understood as a server that provides various services, including physical servers and cloud servers, such as a server that provides communication services to multiple clients, a server for background training that supports the model used on the client, and a server that processes the data sent by the client. It should be noted that the smoke concentration calculation end 104 can be implemented as a distributed server cluster consisting of multiple servers, or as a single server. The smoke concentration calculation end 104 can also be a server for a distributed system, or a server combined with a blockchain. The smoke concentration calculation end 104 can also be a cloud server for basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks (CDNs), and big data and artificial intelligence platforms, or an intelligent cloud computing server or intelligent cloud host with artificial intelligence technology.

[0040] See also Figure 2 , Figure 2 A flowchart of a smoke concentration measurement method provided according to an embodiment of the present specification is shown, which is applied to a smoke concentration measurement system. The smoke concentration measurement system includes a smoke concentration measurement device and a smoke concentration calculation end. The smoke concentration measurement device includes a light source, a polarization unit, a smoke container and a light intensity detector. The light emitted by the light source passes through the polarization unit and the smoke container to reach the light intensity detector. The method specifically includes the following steps.

[0041] Step 202: The light intensity detector receives the light currently passing through the polarization unit and the smoke container, determines current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculation end.

[0042] Specifically, the smoke concentration measurement method provided in one embodiment of this specification can be used for fire warning. For example, the smoke concentration measurement equipment can be installed in an office building. The smoke concentration measurement equipment and the smoke concentration calculation end jointly execute the smoke concentration measurement method to determine whether a fire has occurred in the office building based on the detected smoke concentration, thereby issuing a fire warning to prevent the fire from further spreading.

[0043] The current light intensity information can be understood as the light intensity information of the light at the current moment, and the light intensity can be understood as a physical quantity that describes the intensity of the light source. The polarization unit can be used to polarize the light emitted by the light source and convert the light into linearly polarized light.

[0044] Specifically, at the current moment, the light source can emit light, and the light passes through the polarization unit and the smoke container to reach the light intensity detector. The light intensity detector receives the light at the current moment, detects the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculation end, so that the smoke concentration calculation end can subsequently calculate the smoke concentration at the current moment based on the current light intensity information.

[0045] It is understandable that at the current moment, there may or may not be smoke in the smoke container. The smoke concentration measurement method determines the smoke concentration based on the polarization degree of light, thereby determining whether there is smoke in the smoke container and whether the smoke may be caused by fire, thereby achieving early warning of fire.

[0046] For example, a smoke concentration measuring device is set up in office building A. The light source emits light, and the light intensity detector detects the current light intensity information of the light at the current moment and sends the current light intensity information to the smoke concentration calculation end.

[0047] See also Figure 3 , Figure 3 FIG. 1 shows a schematic structural diagram of a smoke concentration measuring device in a smoke concentration measuring method according to an embodiment of the present invention. Figure 3 As shown, the smoke concentration measuring device includes a light source 302, a polarization unit 304, a smoke container 306 and a light intensity detector 308. The light emitted by the light source 302 passes through the polarization unit 304 and the smoke container 306 to reach the light intensity detector 308. The light intensity detector 308 receives the light and can detect the light intensity information of the light.

[0048] It is understood that in practical applications, all components of the smoke concentration measurement device (i.e., the aforementioned light source 302, polarization unit 304, smoke container 306, and light intensity detector 308) can be integrated into a device with a small hole that allows smoke to easily enter, thereby reducing the size of the smoke concentration measurement device and facilitating real-time measurement of smoke concentration in a real environment. The smoke concentration measurement device has a simple structure, is easily automated and integrated, and is convenient for rapid on-site deployment and use.

[0049] In one embodiment of the present specification, the polarization unit includes a first polarizer and a second polarizer, and the light emitted by the light source passes through the first polarizer, the smoke container, and the second polarizer in sequence to reach the light intensity detector;

[0050] The first polarizer is used to perform polarization processing on the light emitted by the light source, and the second polarizer is used to perform polarization processing on the light passing through the smoke container.

[0051] The first and second polarizers can be understood as polarizers placed on either side of the smoke container. These polarizers filter the polarization direction of light waves, allowing them to pass only if their polarization direction matches the polarization direction of the polarizer. The first polarizer converts unpolarized light into linearly polarized light, while the second polarizer filters specific polarized light.

[0052] Specifically, combined with the above Figure 3 The light emitted by the light source passes through the first polarizer, the smoke container and the second polarizer in sequence to reach the light intensity detector.

[0053] In summary, by providing the first polarizer and the second polarizer, polarization processing of light is achieved, which facilitates the subsequent calculation of the polarization degree of the light and further provides a data basis for the subsequent calculation of smoke concentration.

[0054] Furthermore, the polarization direction of the first polarizer and the polarization direction of the second polarizer are the same, thereby filtering light. In the presence of smoke in the smoke container, the current light intensity information detected subsequently can reflect the effect of smoke on the polarization characteristics of light, thereby enabling subsequent calculation of smoke concentration. In one embodiment of the present specification, the polarization directions of the first polarizer and the second polarizer are both horizontal.

[0055] In a specific implementation, the light emitted by the light source is natural light, and the natural light becomes completely linearly polarized light after passing through the first polarizer. When there is no smoke in the smoke container, the completely linearly polarized light does not experience depolarization after passing through the smoke container.

[0056] In the case where there is smoke in the smoke container, the completely linearly polarized light undergoes a depolarization effect after passing through the smoke container.

[0057] Among them, natural light can be understood as light without polarization effect.

[0058] Specifically, the natural light emitted by the light source passes through the first polarizer, which polarizes the natural light to obtain completely horizontally polarized light, and the completely horizontally polarized light enters the smoke container.

[0059] When there is no smoke in the smoke container, the completely horizontally polarized light will not be scattered and depolarized, so the light emitted from the smoke container is still completely horizontally polarized light. The completely horizontally polarized light will not suffer any light intensity loss when passing through the second polarizer and reaches the light intensity detector.

[0060] In the presence of smoke in a smoke container, when completely horizontally polarized light passes through the smoke, particles in the smoke cause the completely horizontally polarized light to scatter. During the scattering process, the polarization direction of the completely horizontally polarized light changes due to the irregularities of the scattering medium in the smoke and the random distribution of the scattering particles. The light emitted from the smoke container may be converted into partially polarized light or natural light. When the partially polarized light or natural light passes through the second polarizer, the second polarizer filters out non-horizontally polarized light, allowing only horizontally polarized light to pass through and reach the light intensity detector. The horizontally polarized light that passes through the second polarizer can include undepolarized linearly polarized light and the horizontally polarized component of the depolarized natural light.

[0061] In summary, since polarized light changes differently when it passes through smoke and when it does not, the subsequent smoke concentration calculation can be achieved based on the change in polarized light.

[0062] In actual application, the smoke container is provided with a light inlet, a light outlet and a smoke inlet. The light inlet is used to allow the light emitted by the light source to enter the smoke container after passing through the first polarizer. The light outlet is used to allow the light in the smoke container to be emitted to the second polarizer. The smoke inlet is used to allow the smoke to enter the smoke container when smoke is present.

[0063] The light inlet can be arranged on the side of the smoke container close to the first polarizer, the light outlet can be arranged on the side of the smoke container close to the second polarizer, and the smoke inlet can be arranged on any side of the smoke container.

[0064] Specifically, the light emitted by the light source passes through the first polarizer, enters the smoke container through the light inlet, and is emitted from the smoke container to the second polarizer through the light outlet.

[0065] In one embodiment of the present specification, the smoke container may further be provided with a smoke outlet.

[0066] In summary, by providing a light inlet, a light outlet and a smoke inlet, both light and smoke can enter the smoke container, facilitating subsequent measurement of smoke concentration.

[0067] In a specific implementation, the light intensity detector receives the light passing through the polarization unit and the smoke container at a current moment and determines the current light intensity information of the light, including:

[0068] The light intensity detector receives the light currently passing through the polarization unit and the smoke container, and determines the current light intensity information of the light according to a preset time interval.

[0069] The light source can continuously emit light, and the light intensity detector can detect the current light intensity information at the current moment according to a preset time interval. For example, the light intensity detector can detect the current light intensity information at the current moment every 10 minutes, thereby achieving real-time judgment of smoke concentration, and further achieving real-time judgment of whether a fire has occurred. The preset time interval can be determined based on the historical fire situation in the area where the smoke concentration measurement device is placed. If the area has a large number of fires in the historical time period, then the preset time interval can be set to a shorter time interval, such as 5 minutes, 10 minutes, etc. The preset time interval can be determined based on actual measurement needs. In one embodiment of this specification, in order to ensure the timeliness of fire warnings, the preset time interval can be set to the order of seconds. This embodiment of this specification does not limit this.

[0070] Based on this, the light source continuously emits light, and the light intensity detector can receive the light at the current moment according to the preset time interval and detect the current light intensity information of the light at the current moment.

[0071] Continuing with the above example, the light source continuously emits light, and the light intensity detector detects the current light intensity information of the light at the current moment every 20 minutes, and sends the current light intensity information to the smoke concentration calculation end.

[0072] In summary, the light intensity detector detects the current light intensity information of the light, which facilitates the subsequent determination of the smoke concentration based on the current light intensity information.

[0073] In addition, the light intensity detector receives the light passing through the polarization unit and the smoke container at the current moment and before determining the current light intensity information of the light, further includes:

[0074] In response to a device startup instruction, the light source emits light, and the light passes through the polarization unit and the smoke container and reaches the light intensity detector;

[0075] The light intensity detector determines reference light intensity information of the light received when the device is started.

[0076] The reference light intensity information can be understood as the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container. The device startup instruction can be understood as the startup instruction of the smoke concentration measuring device.

[0077] Based on this, in response to the device startup instruction, the light source emits light, and the light passes through the polarization unit and the smoke container to reach the light intensity detector, and the light intensity detector detects the reference light intensity information of the light received at this time.

[0078] In one embodiment of the present specification, the reference light intensity information can be updated according to preset update rules. For example, the smoke concentration measuring device can be started once every month, and the light intensity detector detects the reference light intensity information of the light emitted by the light source when the device is started, and uses the reference light intensity information to replace the reference light intensity information when the device was last started.

[0079] In summary, by detecting the reference light intensity information when the device is started, the reference light intensity information when there is no smoke in the smoke container can be obtained, which facilitates the subsequent calculation of the smoke concentration using the reference light intensity information.

[0080] Then, after obtaining the reference light intensity information of the light detected by the light intensity detector when the device is started, the method further includes:

[0081] The reference light intensity information is sent to the smoke density calculation end, so that the smoke density calculation end obtains the reference light intensity information when calculating the polarization degree of the light.

[0082] Specifically, the reference light intensity information can be sent to the smoke concentration calculation end, so that the smoke concentration calculation end can directly obtain the reference light intensity information when it needs to calculate the polarization degree of light, thereby ensuring the calculation efficiency of the smoke concentration and further improving the timeliness of fire warning.

[0083] Step 204: The smoke concentration calculation end calculates the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container.

[0084] In specific implementation, after receiving the current light intensity information, the smoke concentration calculation end obtains the reference light intensity information, and calculates the polarization degree of the light according to the current light intensity information and the reference light intensity information.

[0085] In practical applications, the formula for calculating the degree of polarization DOP of light is as follows.

[0086]

[0087] Among them, I2 is the current light intensity information, and I1 is the reference light intensity information.

[0088] In practical applications, since the embodiments provided in this specification involve the scattering and deflection process of polarized light, the Stokes method can be used to represent the polarized light, and the formula is shown below.

[0089]

[0090] Among them, the total light intensity S0 is the vector sum in the horizontal and vertical directions, S1 represents the difference between horizontally polarized light and vertically polarized light; S2 represents the difference between 45° linearly polarized light and -45° linearly polarized light; S3 represents the difference between right-handed circularly polarized light and left-handed circularly polarized light.

[0091] For fully polarized light:

[0092]

[0093] For partially polarized light:

[0094] S0 2 >S1 2 +S2 2 +S3 2

[0095] Partially polarized light can be understood as the superposition of fully polarized light and non-polarized light. The ratio of fully polarized light to the total light intensity is defined as the degree of polarization (DOP), as shown in the following formula:

[0096]

[0097] In practical applications, the Stokes vector expression of the polarization state is shown in the following table.

[0098] Stokes vector <![CDATA[S0]]> <![CDATA[S1]]> <![CDATA[S2]]> <![CDATA[S3]]> Horizontal polarization 1 1 0 0 Vertical linear polarization 1 -1 0 0 45° linear polarization 1 0 1 0 -45° linear polarization 1 0 -1 0 Right-handed circular polarization 1 0 0 1 Left-handed circular polarization 1 0 0 0 Natural light 1 0 0 0

[0099] Step 206: The smoke concentration calculation end determines the smoke concentration at the current moment according to the polarization degree of the light.

[0100] Furthermore, determining the smoke concentration at the current moment according to the polarization degree of the light includes:

[0101] According to the polarization degree of the light, the smoke concentration corresponding to the polarization degree is determined from the corresponding relationship between the reference polarization degree and the reference smoke concentration, and the smoke concentration is determined as the smoke concentration at the current moment.

[0102] The correspondence between the reference polarization degree and the reference smoke concentration can be predetermined. For example, a smoke box with a constant smoke concentration can be placed in a smoke container, and the polarization degree of the light at that time can be calculated using the above method. The correspondence between the smoke concentration and the polarization degree is then the correspondence between the reference polarization degree and the reference smoke concentration.

[0103] Based on this, the smoke concentration corresponding to the polarization degree of the light can be determined from the corresponding relationship between the reference polarization degree and the reference smoke concentration, and the smoke concentration can be determined as the smoke concentration at the current moment.

[0104] In addition, after determining the smoke concentration, if it is determined that the smoke concentration has reached a preset concentration threshold, it indicates that there is a high possibility of a fire, and a fire warning message can be generated and sent to a specific target address, such as the regional manager of the area where the smoke concentration measuring device is placed.

[0105] In summary, by determining smoke concentration based on polarization, the interference of ambient light can be reduced and measurement accuracy can be improved. In addition, the polarization measurement method is insensitive to the size distribution of particles present in the smoke and can be applied to the detection of various types of smoke concentrations.

[0106] In one embodiment of the present specification, a smoke concentration measuring device and a smoke concentration calculating end are provided. The light source of the smoke concentration measuring device emits light which passes through a polarization unit and a smoke container to reach a light intensity detector. The light intensity detector receives the light at the current moment, determines the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculating end. The smoke concentration calculating end calculates the polarization degree of the light based on the current light intensity information and the reference light intensity information, and determines the smoke concentration at the current moment based on the polarization degree. By providing a polarization unit and utilizing the polarization characteristics of the light, the smoke concentration can be detected. Since the polarization of light is an inherent property of the light wave itself and is determined by the light wave itself, it will not be affected by the ambient light and particulate matter in the smoke, thereby ensuring the accuracy and stability of the calculated smoke concentration result.

[0107] The following combined Figure 4 Taking the application of the smoke concentration measurement method provided in this specification in fire early warning as an example, the smoke concentration measurement method is further explained. Figure 4 A flowchart of a smoke concentration measurement method according to an embodiment of the present specification is shown, which specifically includes the following steps.

[0108] Step 402: In response to the device startup instruction, the light source emits light, which passes through the polarization unit and the smoke container and reaches the light intensity detector.

[0109] Step 404: The light intensity detector obtains reference light intensity information of the light detected by the light intensity detector when the device is started, and sends the reference light intensity information to the smoke concentration calculation end.

[0110] Step 406: The light intensity detector receives the light currently passing through the polarization unit and the smoke container, determines the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculation end.

[0111] Step 408: The smoke concentration calculation end calculates the polarization degree of the light according to the current light intensity information and the reference light intensity information.

[0112] Step 410: The smoke density calculation end determines the smoke density corresponding to the polarization degree of the light from the corresponding relationship between the reference polarization degree and the reference smoke density, and determines the smoke density as the smoke density at the current moment.

[0113] Step 412: The smoke concentration calculation end generates and sends fire warning information when it is determined that the smoke concentration has reached a preset concentration threshold.

[0114] In one embodiment of the present specification, a smoke concentration measuring device and a smoke concentration calculating end are provided. The light source of the smoke concentration measuring device emits light which passes through a polarization unit and a smoke container to reach a light intensity detector. The light intensity detector receives the light at the current moment, determines the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculating end. The smoke concentration calculating end calculates the polarization degree of the light based on the current light intensity information and the reference light intensity information, and determines the smoke concentration at the current moment based on the polarization degree. By providing a polarization unit and utilizing the polarization characteristics of the light, the smoke concentration can be detected. Since the polarization of light is an inherent property of the light wave itself and is determined by the light wave itself, it will not be affected by the ambient light and particulate matter in the smoke, thereby ensuring the accuracy and stability of the calculated smoke concentration result.

[0115] Corresponding to the above method embodiment, this specification also provides a smoke concentration measurement system embodiment, Figure 5 FIG1 shows a schematic diagram of a smoke concentration measurement system provided by an embodiment of this specification. Figure 5 As shown, the smoke concentration measurement system 500 includes: a smoke concentration measurement device 502 and a smoke concentration calculation terminal 504. The smoke concentration measurement device 502 includes a light source, a polarization unit, a smoke container, and a light intensity detector. The light emitted by the light source passes through the polarization unit and the smoke container to reach the light intensity detector, wherein:

[0116] The light intensity detector is configured to receive the light currently passing through the polarization unit and the smoke container, determine current light intensity information of the light, and send the current light intensity information to the smoke concentration calculation terminal 504;

[0117] The smoke concentration calculation terminal 504 is configured to calculate the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container;

[0118] The smoke concentration calculation end 504 is further configured to determine the smoke concentration at the current moment according to the polarization degree of the light.

[0119] In an optional embodiment, the polarization unit includes a first polarizer and a second polarizer, and the light emitted by the light source passes through the first polarizer, the smoke container, and the second polarizer in sequence to reach the light intensity detector;

[0120] The first polarizer is used to perform polarization processing on the light emitted by the light source, and the second polarizer is used to perform polarization processing on the light passing through the smoke container.

[0121] In an optional embodiment, the light emitted by the light source is natural light, and the natural light becomes completely linearly polarized light after passing through the first polarizer. When there is no smoke in the smoke container, the completely linearly polarized light does not experience depolarization after passing through the smoke container.

[0122] In the case where there is smoke in the smoke container, the completely linearly polarized light undergoes a depolarization effect after passing through the smoke container.

[0123] In an optional embodiment, the polarization direction of the first polarizer is the same as the polarization direction of the second polarizer.

[0124] In an optional embodiment, the smoke container is provided with a light inlet, a light outlet and a smoke inlet. The light inlet is used to allow the light emitted by the light source to enter the smoke container after passing through the first polarizer. The light outlet is used to allow the light in the smoke container to be emitted to the second polarizer. The smoke inlet is used to allow the smoke to enter the smoke container when smoke is present.

[0125] In an optional embodiment, the light intensity detector is further configured as follows:

[0126] The light passing through the polarization unit and the smoke container at a current moment is received, and current light intensity information of the light is determined according to a preset time interval.

[0127] In an optional embodiment, in response to a device startup instruction, the light source emits light, and the light passes through the polarization unit and the smoke container to reach the light intensity detector;

[0128] The light intensity detector determines reference light intensity information of the light received when the device is started.

[0129] In an optional embodiment, the light intensity detector is further configured as follows:

[0130] The reference light intensity information is sent to the smoke density calculation end, so that the smoke density calculation end obtains the reference light intensity information when calculating the polarization degree of the light.

[0131] In an optional embodiment, the smoke concentration calculation terminal 504 is further configured to:

[0132] According to the polarization degree of the light, the smoke concentration corresponding to the polarization degree is determined from the corresponding relationship between the reference polarization degree and the reference smoke concentration, and the smoke concentration is determined as the smoke concentration at the current moment.

[0133] In one embodiment of the present specification, a smoke concentration measuring device and a smoke concentration calculating end are provided. The light source of the smoke concentration measuring device emits light which passes through a polarization unit and a smoke container to reach a light intensity detector. The light intensity detector receives the light at the current moment, determines the current light intensity information of the light, and sends the current light intensity information to the smoke concentration calculating end. The smoke concentration calculating end calculates the polarization degree of the light based on the current light intensity information and the reference light intensity information, and determines the smoke concentration at the current moment based on the polarization degree. By providing a polarization unit and utilizing the polarization characteristics of the light, the smoke concentration can be detected. Since the polarization of light is an inherent property of the light wave itself and is determined by the light wave itself, it will not be affected by the ambient light and particulate matter in the smoke, thereby ensuring the accuracy and stability of the calculated smoke concentration result.

[0134] The above is a schematic diagram of a smoke concentration measurement system according to this embodiment. It should be noted that the technical solution of this smoke concentration measurement system and the technical solution of the aforementioned smoke concentration measurement method are based on the same concept. For details not described in detail in the technical solution of the smoke concentration measurement system, please refer to the description of the technical solution of the aforementioned smoke concentration measurement method.

[0135] Figure 6 6 shows a block diagram of a computing device 600 according to one embodiment of the present disclosure. Components of the computing device 600 include, but are not limited to, a memory 610 and a processor 620. The processor 620 is connected to the memory 610 via a bus 630, and a database 650 is used to store data.

[0136] The computing device 600 also includes an access device 640 that enables the computing device 600 to communicate via one or more networks 660. Examples of such networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 640 may include one or more of any type of network interface (e.g., a network interface card (NIC)) whether wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, a near field communication (NFC) interface, and the like.

[0137] In one embodiment of the present application, the above components of the computing device 600 and Figure 6 Other components not shown in the figure may also be connected to each other, for example, via a bus. Figure 6 The computing device structure block diagram shown is for illustrative purposes only and is not intended to limit the scope of the present application. Those skilled in the art may add or replace other components as needed.

[0138] Computing device 600 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, personal digital assistant, laptop computer, notebook computer, netbook computer, etc.), a mobile phone (e.g., a smartphone), a wearable computing device (e.g., a smartwatch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or personal computer (PC). Computing device 600 may also be a mobile or stationary server.

[0139] The processor 620 is configured to execute the following computer program / instruction, which implements the steps of the above-mentioned smoke concentration measurement method when executed by the processor.

[0140] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other. Each embodiment focuses on the differences between the other embodiments. In particular, the computing device embodiment is generally similar to the smoke concentration measurement method embodiment, so its description is relatively simple. For relevant portions, refer to the description of the smoke concentration measurement method embodiment.

[0141] An embodiment of the present specification further provides a computer-readable storage medium storing a computer program / instruction. When the computer program / instruction is executed by a processor, the steps of the above-mentioned smoke concentration measurement method are implemented.

[0142] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from the other embodiments. In particular, the computer-readable storage medium embodiment is generally similar to the smoke concentration measurement method embodiment, so its description is relatively simple. For relevant portions, refer to the description of the smoke concentration measurement method embodiment.

[0143] An embodiment of the present specification further provides a computer program product, comprising a computer program / instruction, which implements the steps of the above-mentioned smoke concentration measurement method when executed by a processor.

[0144] The above is a schematic diagram of a computer program product according to this embodiment. It should be noted that the technical solution of this computer program product is based on the same concept as the technical solution of the aforementioned smoke concentration measurement method. For details not described in detail in the technical solution of the computer program product, please refer to the description of the technical solution of the aforementioned smoke concentration measurement method.

[0145] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0146] The computer instructions include computer program codes, which may be in source code form, object code form, executable files, or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal, and software distribution medium. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of patent practice. For example, in some regions, according to patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0147] It should be noted that for the aforementioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0148] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0149] The preferred embodiments disclosed above are intended only to help illustrate this specification. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made based on the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that those skilled in the art can better understand and utilize this specification. This specification is limited only by the claims and their full scope and equivalents.

Claims

1. A method for measuring smoke concentration, characterized in that: The method is applied to a smoke concentration measurement system, the smoke concentration measurement system including a smoke concentration measurement device and a smoke concentration calculation terminal, the smoke concentration measurement device including a light source, a polarization unit, a smoke container, and a light intensity detector, the light emitted by the light source passing through the polarization unit and the smoke container reaches the light intensity detector, and the method includes: The light intensity detector receives the light currently passing through the polarization unit and the smoke container, determines current light intensity information of the light at a preset time interval, and transmits the current light intensity information to the smoke concentration calculation end, wherein, when smoke is present in the smoke container, the light undergoes a depolarization effect under the influence of the smoke, and the polarization unit includes a first polarizer and a second polarizer, and the polarization direction of the first polarizer is the same as the polarization direction of the second polarizer; The smoke concentration calculation end calculates the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container; The smoke concentration calculation end determines the smoke concentration corresponding to the polarization degree of the light from the corresponding relationship between the reference polarization degree and the reference smoke concentration, and determines the smoke concentration as the smoke concentration at the current moment.

2. The smoke concentration measurement method according to claim 1, characterized in that: The light emitted by the light source passes through the first polarizer, the smoke container, the second polarizer in sequence and reaches the light intensity detector; The first polarizer is used to perform polarization processing on the light emitted by the light source, and the second polarizer is used to perform polarization processing on the light passing through the smoke container.

3. The smoke concentration measurement method according to claim 2, characterized in that: The light emitted by the light source is natural light, and the natural light becomes completely linearly polarized light after passing through the first polarizer. In the absence of smoke in the smoke container, the completely linearly polarized light does not experience depolarization after passing through the smoke container. In the case where there is smoke in the smoke container, the completely linearly polarized light undergoes a depolarization effect after passing through the smoke container.

4. The smoke concentration measurement method according to claim 2, characterized in that: The smoke container is provided with a light inlet, a light outlet and a smoke inlet. The light inlet is used to allow the light emitted by the light source to enter the smoke container after passing through the first polarizer. The light outlet is used to allow the light in the smoke container to be emitted to the second polarizer. The smoke inlet is used to allow the smoke to enter the smoke container when smoke is present.

5. The smoke concentration measurement method according to claim 1, characterized in that: The light intensity detector receives the light currently passing through the polarization unit and the smoke container and determines the current light intensity information of the light, further comprising: In response to a device startup instruction, the light source emits light, and the light passes through the polarization unit and the smoke container and reaches the light intensity detector; The light intensity detector determines reference light intensity information of the light received when the device is started.

6. The smoke concentration measurement method according to claim 5, characterized in that: The light intensity detector, after determining the reference light intensity information of the light received when the device is started, further includes: The reference light intensity information is sent to the smoke density calculation end, so that the smoke density calculation end obtains the reference light intensity information when calculating the polarization degree of the light.

7. A smoke concentration measurement system, characterized in that: The smoke concentration measurement system includes a smoke concentration measurement device and a smoke concentration calculation terminal. The smoke concentration measurement device includes a light source, a polarization unit, a smoke container, and a light intensity detector. The light emitted by the light source passes through the polarization unit and the smoke container to reach the light intensity detector. The light intensity detector is configured to receive the light currently passing through the polarization unit and the smoke container, determine current light intensity information of the light at a preset time interval, and send the current light intensity information to the smoke concentration calculation end, wherein, when smoke is present in the smoke container, the light undergoes a depolarization effect under the influence of the smoke, and the polarization unit includes a first polarizer and a second polarizer, and the polarization direction of the first polarizer is the same as the polarization direction of the second polarizer; The smoke concentration calculation end is configured to calculate the polarization degree of the light according to the current light intensity information and reference light intensity information, wherein the reference light intensity information is the light intensity information of the light detected by the light intensity detector when there is no smoke in the smoke container; The smoke concentration calculation end is further configured to determine the smoke concentration corresponding to the polarization degree of the light from the corresponding relationship between the reference polarization degree and the reference smoke concentration, and determine the smoke concentration as the smoke concentration at the current moment.

8. A computing device, characterized in that include: memory and processor; The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions. When the computer program / instructions are executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium, characterized in that It stores a computer program / instruction, which implements the steps of the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product, characterized in that The method comprises a computer program / instruction, which implements the steps of the method according to any one of claims 1 to 6 when executed by a processor.

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