CN111678614A - Ambient temperature detection method, ambient temperature detection device and storage medium - Google Patents
Ambient temperature detection method, ambient temperature detection device and storage medium Download PDFInfo
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- CN111678614A CN111678614A CN202010577077.0A CN202010577077A CN111678614A CN 111678614 A CN111678614 A CN 111678614A CN 202010577077 A CN202010577077 A CN 202010577077A CN 111678614 A CN111678614 A CN 111678614A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
Abstract
The invention discloses an environmental temperature detection method, an environmental temperature detection device and a storage medium, wherein the method comprises the following steps: collecting gas to be detected from a region to be detected into a detection cavity; separating particles with the particle size outside a preset range in the gas to be detected to the edge of the detection cavity, wherein the preset range is the particle size range of the pyroelectric ions; controlling a light source to emit light rays within a preset wavelength range, and receiving scattered light rays scattered by the pyroelectric ions through a photosensitive device which is not positioned on a light ray passage of the light source; and determining the concentration of the pyroelectric ions according to the received intensity of the scattered light so as to obtain the environmental temperature of the area to be detected. The method and the device determine the current environmental temperature of the area to be detected by detecting the concentration of the pyroelectric ions in the gas to be detected, and timely perform fire early warning. And can not receive the influence of large granule materials such as haze, dust in the air, promote and detect the accuracy, reduce the wrong report rate and the rate of missing reporting of conflagration early warning.
Description
Technical Field
The invention relates to the technical field of fire detection, in particular to an environmental temperature detection method, an environmental temperature detection device and a storage medium.
Background
Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally. When a fire disaster happens, the fire disaster detector can quickly detect and send out an alarm prompt, so that the life and property safety of people can be effectively protected.
The existing smoke-sensitive fire detection system scatters light emitted by a light source in a detection chamber after a large amount of smoke is generated and diffused to a detector when a fire breaks out, a receiving device is arranged on a light path emitted by the light source, and the fire is judged to break out when a light signal received by the receiving device is weakened. In the above detection mode, not only smoke particles caused by fire can shield light, but also substances such as haze and dust in the air can reduce light signals received by the receiving device, so that a detection system can easily send false alarms. When the light source is used for a long time, the light attenuation phenomenon is easy to occur, and when the intensity of the emitted light is weakened, the light signal received by the receiving device is weakened, so that fire disaster misinformation is caused.
Disclosure of Invention
The invention mainly aims to provide an environmental temperature detection method, an environmental temperature detection device and a storage medium, and aims to solve the problem of high error rate of the conventional fire detection mode.
In order to achieve the above object, the present invention provides an ambient temperature detection method, comprising the steps of:
collecting gas to be detected from a region to be detected into a detection cavity;
separating particles with the particle size outside a preset range in the gas to be detected to the edge of the detection cavity, wherein the preset range is the particle size range of the pyroelectric ions;
controlling a light emitting source to emit light rays within a preset wavelength range, and receiving scattered light rays scattered by pyroelectric ions in the detection cavity through a photosensitive device, wherein the photosensitive device is not positioned on a light ray passage emitted by the light emitting source; and determining the concentration of the pyroelectric ions according to the received intensity of the scattered light so as to obtain the environmental temperature of the area to be detected.
Optionally, the step of separating particles with a particle size outside a preset range in the gas to be detected to the edge of the detection cavity includes:
and pressurizing the sealed interior of the detection cavity so that particles with the particle size larger than a preset range in the gas to be detected sink to the bottom of the detection cavity.
Optionally, the step of pressurizing the sealed interior of the detection cavity to make particles with a particle size larger than a preset range in the gas to be detected sink to the bottom of the detection cavity includes:
pressurizing the inside of the sealed detection cavity, and detecting the internal air pressure of the detection cavity;
and when the internal air pressure of the detection cavity is detected to reach the preset air pressure range, stopping pressurizing so as to enable particles with the particle size larger than the preset range in the gas to be detected to sink to the bottom of the detection cavity.
Optionally, the step of controlling the light emitting source to emit light within a preset wavelength range, and receiving scattered light scattered by the pyroelectric ions in the detection cavity through the photosensitive device includes:
controlling a light emitting source at one side of the detection cavity to emit light within a preset wavelength range;
and receiving scattered light emitted by the light emitting source and scattered by the pyroelectric ions in the detection cavity through a photosensitive device arranged in the detection cavity, wherein the photosensitive device is arranged at the top of the detection cavity.
Optionally, before the step of determining the concentration of the pyroelectric ions according to the received intensity of the scattered light to obtain the ambient temperature of the region to be detected, the method further includes:
converting the optical signal received by the photosensitive device into an electric signal through a light detection circuit;
and calculating the illumination intensity of the scattered light according to the electric signal.
Optionally, the step of determining the concentration of the pyroelectric ions according to the received intensity of the scattered light to obtain the ambient temperature of the region to be detected includes:
determining the concentration of the pyroelectric ions according to a preset relation table of illumination intensity and ion concentration and the received illumination intensity of the scattered light;
and determining the environmental temperature of the area to be detected according to a preset relationship table of the concentration of the pyroelectric ions and the environmental temperature and the concentration of the pyroelectric ions.
Optionally, the method further includes the steps of controlling the light emitting source to emit light within a preset wavelength range, and receiving scattered light scattered by the pyroelectric ions in the detection cavity through a photosensitive device;
calculating the increase rate of the illumination intensity of the scattered light according to the intensity of the scattered light received in a preset period;
and when the increase rate of the illumination intensity is higher than a preset increase rate, determining that the environmental temperature of the area to be detected is abnormally increased.
Optionally, the step of collecting the gas to be detected from the region to be detected into the detection cavity comprises:
extracting the detected gas from the detection cavity so that the air pressure in the detection cavity is lower than that of the area to be detected;
and opening the gas inlets of the detection cavity and the to-be-detected area so as to enable the to-be-detected gas in the to-be-detected area to flow into the detection cavity.
In addition, to achieve the above object, the present invention further provides an ambient temperature detecting apparatus, including a memory, a processor, and an ambient temperature detecting program stored in the memory and executable on the processor, wherein: the ambient temperature detection program, when executed by the processor, implements the steps of the ambient temperature detection method as described above.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon an ambient temperature detection program which, when executed by a processor, implements the steps of the ambient temperature detection method as described above.
According to the environment temperature detection method, the device and the storage medium provided by the embodiment of the invention, the gas to be detected in the region to be detected is collected, and other particles in the gas to be detected are separated, so that the pyroelectric ions floating in the detection cavity scatter light emitted by the light emitting source, and the scattered light is received and counted by the photosensitive device, so that the concentration of the pyroelectric ions in the gas to be detected is obtained. The current environmental temperature of the area to be detected can be determined according to the concentration of the pyroelectric ions, high-temperature early warning is carried out when the environmental temperature is abnormal, and the device can be particularly used for fire early warning and provides sufficient emergency processing time for disaster situation processing personnel. Meanwhile, the environment temperature can not be influenced by large particle substances such as haze and dust in the air through heat release ion concentration detection, the accuracy of environment temperature detection is improved, and the false alarm rate and the missing report rate of fire early warning are reduced.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the method for detecting ambient temperature according to the present invention;
FIG. 3 is a schematic flowchart of a second embodiment of the method for detecting ambient temperature according to the present invention;
FIG. 4 is a schematic flowchart of a third embodiment of the method for detecting ambient temperature according to the present invention;
FIG. 5 is a schematic flowchart of a fourth embodiment of the method for detecting ambient temperature according to the present invention;
FIG. 6 is a flowchart illustrating a fifth exemplary embodiment of an ambient temperature detection method according to the present invention;
FIG. 7 is a flowchart illustrating a sixth exemplary embodiment of a method for detecting an ambient temperature according to the present invention;
fig. 8 is a flowchart illustrating a method for detecting an ambient temperature according to a seventh embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be an environment temperature detection device which can detect the environment temperature in the area to be detected so as to quickly determine whether the area has a fire or not.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. In particular, the light sensor may include an ambient light sensor and a proximity sensor. Of course, the hardware device may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and so on, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an ambient temperature sensing program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the ambient temperature detection program stored in the memory 1005 and perform the following operations:
collecting gas to be detected from a region to be detected into a detection cavity;
separating particles with the particle size outside a preset range in the gas to be detected to the edge of the detection cavity, wherein the preset range is the particle size range of the pyroelectric ions;
controlling a light emitting source to emit light rays within a preset wavelength range, and receiving scattered light rays scattered by pyroelectric ions in the detection cavity through a photosensitive device, wherein the photosensitive device is not positioned on a light ray passage emitted by the light emitting source; and determining the concentration of the pyroelectric ions according to the received intensity of the scattered light so as to obtain the environmental temperature of the area to be detected.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
and pressurizing the sealed interior of the detection cavity so that particles with the particle size larger than a preset range in the gas to be detected sink to the bottom of the detection cavity.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
pressurizing the inside of the sealed detection cavity, and detecting the internal air pressure of the detection cavity;
and when the internal air pressure of the detection cavity is detected to reach the preset air pressure range, stopping pressurizing so as to enable particles with the particle size larger than the preset range in the gas to be detected to sink to the bottom of the detection cavity.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
controlling a light emitting source at one side of the detection cavity to emit light within a preset wavelength range;
and receiving scattered light emitted by the light emitting source and scattered by the pyroelectric ions in the detection cavity through a photosensitive device arranged in the detection cavity, wherein the photosensitive device is arranged at the top of the detection cavity.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
converting the optical signal received by the photosensitive device into an electric signal through a light detection circuit;
and calculating the illumination intensity of the scattered light according to the electric signal.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
determining the concentration of the pyroelectric ions according to a preset relation table of illumination intensity and ion concentration and the received illumination intensity of the scattered light;
and determining the environmental temperature of the area to be detected according to a preset relationship table of the concentration of the pyroelectric ions and the environmental temperature and the concentration of the pyroelectric ions.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
calculating the increase rate of the illumination intensity of the scattered light according to the intensity of the scattered light received in a preset period;
and when the increase rate of the illumination intensity is higher than a preset increase rate, determining that the environmental temperature of the area to be detected is abnormally increased.
Further, the processor 1001 may call the ambient temperature detection program stored in the memory 1005, and also perform the following operations:
extracting the detected gas from the detection cavity so that the air pressure in the detection cavity is lower than that of the area to be detected;
and opening the gas inlets of the detection cavity and the to-be-detected area so as to enable the to-be-detected gas in the to-be-detected area to flow into the detection cavity.
The specific embodiment of the environment temperature detection device of the present invention is substantially the same as the following embodiments of the environment temperature detection method, and is not described herein again.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating an ambient temperature detection method according to a first embodiment of the present invention, wherein the ambient temperature detection method includes the following steps:
step S10, collecting the gas to be detected from the area to be detected into the detection cavity;
in this embodiment, the detection cavity includes an air inlet for receiving a gas to be detected and an air outlet for discharging the detected gas. The air inlet of the detection cavity can extend to an area to be detected, which needs to be subjected to ambient temperature detection, through a sampling pipe, and gas to be detected in the area to be detected is collected through a sampling hole in the sampling pipe. Because detection device only has the sampling pipe to extend outside the device, the sampling pipe need not to lay electrified circuit, and detection device's electronic component and current path all are inside the casing of device, are difficult to receive external interference, can promote detection device's life and stability effectively. Compared with the prior art that the detector is connected with the controller through a communication line, the interference of signal transmission caused by the antenna effect generated by the line can be avoided.
Step S20, separating particles with the particle size outside a preset range in the gas to be detected to the edge of the detection cavity, wherein the preset range is the particle size range of pyroelectric ions;
after the sampling tube is used for collecting the gas to be detected in the region to be detected, the gas to be detected contains various particles or particles with different particle sizes. By separating the gas to be detected, different particles can be separated according to the particle size range of the particles, so that the particles with the particle size outside the particle size range of the pyroelectric ions can be separated to each edge of the detection cavity, for example, to the side wall, the top surface or the bottom surface of the detection cavity. After the separation treatment, the particles floating in the gas to be detected in the detection cavity are the pyroelectric ions. The pyroelectric ion is an ion which is released in the air by heating an object, and the fire can be detected and early warned according to the concentration of the pyroelectric ion in the air.
Step S30, controlling a light emitting source to emit light within a preset wavelength range, and receiving scattered light scattered by pyroelectric ions in the detection cavity through a photosensitive device, wherein the photosensitive device is not located on a light path emitted by the light emitting source; after separating the particles with the particle size outside the preset range of the pyroelectric ions to each edge of the detection cavity, light rays within a certain wavelength range can be emitted through the light emitting source arranged at one end of the detection cavity, and the light rays within the wavelength range can be scattered after being emitted through the pyroelectric ions. A photosensitive device for receiving light is also arranged in the detection cavity. After the light emitted by the light emitting source passes through the pyroelectric ions and is scattered to irradiate each position in the detection cavity, the photosensitive device can receive the scattered light irradiating the photosensitive device. It should be noted that the photosensitive device is used for receiving the scattered light after being scattered by the pyroelectric ions, and therefore the photosensitive device cannot be disposed at a position where the light emitted by the light source can be directly emitted, that is, the photosensitive device is not located on a direct light path of the light.
Step S40, determining the concentration of the pyroelectric ions according to the intensity of the received scattered light, so as to obtain the ambient temperature of the region to be detected.
The greater the concentration of the pyroelectric ions in the detection cavity is, the stronger the scattering is, and the more the scattering light rays are received by the photosensitive device. The scattered light received by the photosensitive device is quantified, and the intensity of the scattered light can be obtained, so that the concentration of the pyroelectric ions in the detection cavity is determined. Because the gas to be detected is a gas sample of the region to be detected, the concentration of the pyroelectric ions in the gas to be detected is positively correlated with the ambient temperature of the region to be detected. And determining the current environment temperature of the area to be detected according to the concentration of the pyroelectric ions of the current gas to be detected.
In this embodiment, treat the detection area in the gas that waits to detect through the collection to other particles in waiting to detect the gas separate, can make the light that the luminous source sent of the interior showy heat release ion of detection cavity scatter, and receive statistics through the light of sensitization device after to the scattering, in order to reachd and treat the interior heat release ion concentration that detects the gas. The current environmental temperature of the area to be detected can be determined according to the concentration of the pyroelectric ions, high-temperature early warning is carried out when the environmental temperature is abnormal, and the device can be particularly used for fire early warning and provides sufficient emergency processing time for disaster situation processing personnel. Meanwhile, the environment temperature can not be influenced by large particle substances such as haze and dust in the air through heat release ion concentration detection, the accuracy of environment temperature detection is improved, and the false alarm rate and the missing report rate of fire early warning are reduced.
Further, referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the ambient temperature detection method according to the present invention, based on the embodiment shown in fig. 2, in step S20, the step of separating particles with a particle size outside a preset range from the gas to be detected to the edge of the detection cavity, where the step of the preset range being the particle size range of the pyroelectric ions includes:
and step S21, pressurizing the sealed detection cavity to make particles with the particle size larger than a preset range in the gas to be detected sink to the bottom of the detection cavity.
In this embodiment, after the gas to be detected collected from the region to be detected enters the detection cavity, the detection cavity is sealed, and the inside of the sealed detection cavity is pressurized. In the process that the air pressure in the detection cavity is gradually increased, water molecules in the air are liquefied, and particles or particles with larger particle sizes in the air are wrapped and sink to the bottom of the detection cavity under the action of gravity. And particles with smaller particle size, such as pyroelectric ions, continuously float in the detection cavity to form a cloud shape. After the pyroelectric ions are separated from other particles with larger particle sizes, light rays emitted by the light emitting source can be ensured to be scattered after passing through the pyroelectric ions when being transmitted in the detection cavity.
It can be understood that, because the air pressure in the detection cavity is increased, most other particles are combined with the liquefied water and sink to the bottom of the detection cavity, the light-emitting source can be arranged on one side surface of the detection cavity and emit light to the opposite side surface, and the photosensitive device can be arranged on the top of the detection cavity to avoid the interference of the other particles at the bottom to the propagation of the light. Because the photosensitive device is not arranged on the central shaft of the luminous source, the light received by the photosensitive device is necessarily the scattered light.
Further, referring to fig. 4, fig. 4 is a schematic flow chart of a third embodiment of the ambient temperature detecting method of the present invention, based on the embodiment shown in fig. 3, in step S21, the step of pressurizing the inside of the sealed detection cavity to make the particles with the particle size larger than the preset range in the gas to be detected sink to the bottom of the detection cavity includes:
step S211, pressurizing the sealed interior of the detection cavity, and detecting the internal air pressure of the detection cavity;
step S212, when it is detected that the internal air pressure of the detection cavity reaches a preset air pressure range, stopping pressurizing, so that particles with a particle size larger than the preset range in the gas to be detected sink to the bottom of the detection cavity.
In this embodiment, a pressure sensor is disposed in the detection cavity, and the air pressure in the detection cavity can be monitored by the pressure sensor. In the process of pressurizing the closed detection cavity, the change of the air pressure in the detection cavity can be monitored in real time through the pressure sensor, and the pressurization of the detection cavity can be stopped when the air pressure in the detection cavity is detected to reach the preset air pressure range. The preset air pressure range may be set to an air pressure range capable of liquefying water molecules in the air. After the air pressure in the detection cavity reaches the preset air pressure range, water molecules in the detection cavity are liquefied and coat particles with larger particle sizes to sink to the bottom of the detection cavity, so that the pyroelectric ions are effectively separated from other particles with larger particle sizes.
Further, referring to fig. 5, fig. 5 is a schematic flowchart of a fourth embodiment of the method for detecting an ambient temperature according to the present invention, based on the embodiment shown in fig. 2, in step S30, the step of controlling the light source to emit light within a predetermined wavelength range, and receiving scattered light scattered by the pyroelectric ions in the detection cavity through the photosensitive device includes:
step S31, controlling a light source at one side of the detection cavity to emit light within a preset wavelength range;
step S32, receiving scattered light emitted by the light emitting source and scattered by the pyroelectric ions in the detection cavity through a photosensitive device disposed in the detection cavity, wherein the photosensitive device is disposed at the top of the detection cavity.
In this embodiment, the light source may be disposed on one side of the detection cavity and emit light within a predetermined wavelength range, and the light within the wavelength range may encounter the pyroelectric ions during the propagation process to be scattered, i.e., the wavelength of the light is smaller than the particle size of the pyroelectric ions. The photosensitive device is also arranged in the detection cavity and can receive scattered light after the light emitted by the light emitting source is scattered by the pyroelectric ions. It can be understood that when the photosensitive device is disposed on the light path emitted by the light source, the photosensitive device can receive the light that is not scattered, and therefore the photosensitive device can be disposed on the top of the detection cavity to avoid interference of other particles on the bottom to the propagation of the light.
Further, referring to fig. 6, fig. 6 is a schematic flowchart of a fifth embodiment of the method for detecting an ambient temperature according to the present invention, based on the embodiment shown in fig. 2, before the step of determining the concentration of the pyroelectric ions according to the intensity of the received scattered light to obtain the ambient temperature of the to-be-detected region in step S40, the method further includes:
step S50, converting the optical signal received by the photosensitive device into an electric signal through a light detection circuit;
and step S51, calculating the illumination intensity of the scattered light according to the electric signal.
In this embodiment, the light sensing device may be a photodiode, and the photodiode may be connected to the controller through a light detection circuit, where the light detection circuit includes an operational amplifier circuit. When the photosensitive diode receives a light signal, the two ends of the photosensitive diode generate a voltage difference, and after the voltage difference signal is amplified by the operational amplification circuit, the signal amplitude can be increased to the controller to be detected. The controller detects the amplified voltage signal through the ADC channel, and then light signals received by the photodiode can be subjected to quantitative statistics to calculate the illumination intensity of scattered light. It is understood that the operational amplification circuit may be a two-stage operational amplification circuit to increase the signal amplitude to be within the detection range of the controller through two-stage amplification.
Further, referring to fig. 7, fig. 7 is a schematic flowchart of a sixth embodiment of the ambient temperature detecting method according to the present invention, based on the embodiment shown in fig. 6, the step S40 of determining the concentration of the pyroelectric ions according to the intensity of the received scattered light to obtain the ambient temperature of the to-be-detected region includes:
step S41, determining the concentration of the pyroelectric ions according to a preset relation table of illumination intensity and ion concentration and the received illumination intensity of the scattered light;
and step S42, determining the environment temperature of the area to be detected according to a preset relationship table of the concentration of the pyroelectric ions and the environment temperature and the concentration of the pyroelectric ions.
In the present embodiment, a correspondence table between the light intensity and the ion concentration and a correspondence table between the pyroelectric ion concentration and the ambient temperature are stored in advance in the memory. After the scattered light is received by the photosensitive device and converted into an electric signal for quantitative statistics, the illumination front degree of the scattered light received by the photosensitive device can be obtained, the concentration of the pyroelectric ions of the gas to be detected can be determined through the corresponding relation table, and the environment temperature of the area to be detected can be further obtained according to the concentration of the pyroelectric ions of the gas to be detected and the corresponding relation table. It is understood that a correspondence table of the illumination intensity and the ambient temperature may also be set in advance. According to the illumination intensity obtained by detecting the electric signal converted by the controller, the current environmental temperature of the area to be detected can be directly and correspondingly obtained, so that whether a fire disaster happens to the area to be detected or not is determined, and early warning is timely given out.
Further, referring to fig. 8, fig. 8 is a schematic flowchart of a seventh embodiment of the method for detecting an ambient temperature according to the present invention, based on the embodiment shown in fig. 2, after the step S30 of controlling the light source to emit light within a preset wavelength range and receiving scattered light scattered by the pyroelectric ions in the detection cavity through the photosensitive device, the method further includes:
step S60, calculating the increase rate of the illumination intensity of the scattered light according to the intensity of the scattered light received in a preset period;
and step S61, when the increase rate of the illumination intensity is higher than a preset increase rate, determining that the ambient temperature of the area to be detected is abnormally increased.
In this embodiment, the detection cavity can collect the gas to be detected once at preset intervals, and detect the scattered light intensity of the gas to be detected, and the scattered light intensity in each preset interval can correspond to the unique pyroelectric ion concentration. It is understood that when the intensity of the scattered light detected in the next period is higher than that in the previous period, it indicates that the concentration of the pyroelectric ions in the region to be detected is increasing. The intensity of scattered light that detects according to different periods can calculate the illumination intensity growth rate that obtains scattered light, when detecting that the illumination intensity growth rate is higher than predetermineeing the growth rate, indicates that the concentration of the heat release ion in waiting to detect the region is increasing fast, also detects the ambient temperature of detecting the region and is rising fast, and ambient temperature detection device can send out the conflagration early warning to the outside this moment to suggestion relevant personnel in time handle the dangerous situation, guarantee personal and property safety.
Further, in an eighth embodiment of the ambient temperature detecting method according to the present invention, based on the embodiments shown in fig. 2 to 7, in step S10, the step of collecting the gas to be detected from the region to be detected into the detection cavity includes:
step S11, extracting the detected gas from the detection cavity, so that the air pressure in the detection cavity is lower than that of the area to be detected;
step S12, opening the detection cavity and the gas inlet of the region to be detected, so that the gas to be detected in the region to be detected flows into the detection cavity.
In this embodiment, the gas to be detected may be collected from the region to be detected at intervals of a certain period of time to perform detection of the concentration of the pyroelectric ions, so as to determine whether the ambient temperature of the region to be detected is normal. After a certain detection process is completed, the detected gas can be extracted from the interior of the detection cavity through the gas outlet, the gas pressure in the detection cavity after the gas extraction is completed is lower than the gas pressure of the region to be detected, the gas outlet is sealed at the moment, the gas inlet connected with the region to be detected is opened, and then the air flows from the region to be detected with higher gas pressure to the detection cavity with lower gas pressure, so that the active extraction of the gas to be detected is realized.
It should be noted that the detection cavity may be a black cavity to avoid the influence of external light. The pressure sensor can be arranged near the photosensitive device to detect the air pressure near the photosensitive device, and ensure that water molecules around the photosensitive device are liquefied under high air pressure and coated with particles with larger particle sizes for sedimentation. In the prior art, fire warning with smoke concentration of 5% -obs/m-20% obs/m can be realized by blocking light by floating particles in the air, and the embodiment of the invention can perform fire warning when the smoke concentration is 0.001% -obs/m-20% obs/m, namely, detection and prompt can be performed at the beginning of fire occurrence, so that sufficient processing time is reserved for related personnel to process the fire.
Above-mentioned ambient temperature detecting device can independent network deployment, also can be networked with the computer or be networked with other systems through relay switch through the RS485 interface, can also be through wireless network networking such as 4G module, bluetooth to the ambient temperature who waits to detect that will survey to obtain in time sends to the server end to the region. The detection device is also internally provided with a black box function, so that historical detection data can be stored when the device is damaged, and analysis processing and optimization can be conveniently carried out according to the stored historical data.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, on which an environment temperature detection program is stored, where the storage medium may be the Memory 1005 in the terminal in fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes several instructions to enable an environment temperature detection apparatus having a processor to execute the environment temperature detection method according to the embodiments of the present invention.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An ambient temperature detection method, comprising the steps of:
collecting gas to be detected from a region to be detected into a detection cavity;
separating particles with the particle size outside a preset range in the gas to be detected to the edge of the detection cavity, wherein the preset range is the particle size range of the pyroelectric ions;
controlling a light emitting source to emit light rays within a preset wavelength range, and receiving scattered light rays scattered by pyroelectric ions in the detection cavity through a photosensitive device, wherein the photosensitive device is not positioned on a light ray passage emitted by the light emitting source;
and determining the concentration of the pyroelectric ions according to the received intensity of the scattered light so as to obtain the environmental temperature of the area to be detected.
2. The method according to claim 1, wherein the step of separating particles having a particle size outside a predetermined range from the gas to be detected to the edge of the detection chamber comprises:
and pressurizing the sealed interior of the detection cavity so that particles with the particle size larger than a preset range in the gas to be detected sink to the bottom of the detection cavity.
3. The method according to claim 2, wherein the step of pressurizing the inside of the sealed detection chamber to allow particles having a particle size larger than a predetermined range in the gas to be detected to sink to the bottom of the detection chamber comprises:
pressurizing the inside of the sealed detection cavity, and detecting the internal air pressure of the detection cavity;
and when the internal air pressure of the detection cavity is detected to reach the preset air pressure range, stopping pressurizing so as to enable particles with the particle size larger than the preset range in the gas to be detected to sink to the bottom of the detection cavity.
4. The method of claim 1, wherein the step of controlling the light source to emit light within a predetermined wavelength range and receiving scattered light scattered by the pyroelectric ions within the detection chamber via the light sensor comprises:
controlling a light emitting source at one side of the detection cavity to emit light within a preset wavelength range;
and receiving scattered light emitted by the light emitting source and scattered by the pyroelectric ions in the detection cavity through a photosensitive device arranged in the detection cavity, wherein the photosensitive device is arranged at the top of the detection cavity.
5. The method according to claim 1, wherein the step of determining the concentration of the pyroelectric ions according to the intensity of the received scattered light to obtain the ambient temperature of the region to be detected further comprises:
converting the optical signal received by the photosensitive device into an electric signal through a light detection circuit;
and calculating the illumination intensity of the scattered light according to the electric signal.
6. The method according to claim 5, wherein the step of determining the concentration of the pyroelectric ions according to the intensity of the received scattered light to obtain the ambient temperature of the region to be detected comprises:
determining the concentration of the pyroelectric ions according to a preset relation table of illumination intensity and ion concentration and the received illumination intensity of the scattered light;
and determining the environmental temperature of the area to be detected according to a preset relationship table of the concentration of the pyroelectric ions and the environmental temperature and the concentration of the pyroelectric ions.
7. The method according to claim 1, wherein the step of controlling the light source to emit light within a predetermined wavelength range and receiving scattered light scattered by the pyroelectric ions in the detection chamber via a light sensing device further comprises;
calculating the increase rate of the illumination intensity of the scattered light according to the intensity of the scattered light received in a preset period;
and when the increase rate of the illumination intensity is higher than a preset increase rate, determining that the environmental temperature of the area to be detected is abnormally increased.
8. The ambient temperature detection method of any one of claims 1-7, wherein the step of collecting the gas to be detected from the area to be detected into the detection chamber comprises:
extracting the detected gas from the detection cavity so that the air pressure in the detection cavity is lower than that of the area to be detected;
and opening the gas inlets of the detection cavity and the to-be-detected area so as to enable the to-be-detected gas in the to-be-detected area to flow into the detection cavity.
9. An ambient temperature detection device, comprising a memory, a processor, and an ambient temperature detection program stored on the memory and executable on the processor, wherein: the ambient temperature detection program, when executed by the processor, implements the steps of the ambient temperature detection method according to any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an ambient temperature detection program which, when executed by a processor, implements the steps of the ambient temperature detection method according to any one of claims 1 to 8.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3400593A (en) * | 1992-05-18 | 1993-05-06 | Vfs Technologies Limited | Fluid pollution monitor |
| EP2500883A2 (en) * | 2011-03-16 | 2012-09-19 | Honeywell International, Inc. | High sensitivity and high false alarm immunity optical smoke detector |
| CN103366495A (en) * | 2013-07-11 | 2013-10-23 | 合肥工业大学 | Air-breathing high-sensitivity smoke particle detector and application thereof |
| CN108765859A (en) * | 2018-06-19 | 2018-11-06 | 郑州坤博科技有限公司 | A kind of smoke-temperature sensing fire detector |
-
2020
- 2020-06-22 CN CN202010577077.0A patent/CN111678614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3400593A (en) * | 1992-05-18 | 1993-05-06 | Vfs Technologies Limited | Fluid pollution monitor |
| EP2500883A2 (en) * | 2011-03-16 | 2012-09-19 | Honeywell International, Inc. | High sensitivity and high false alarm immunity optical smoke detector |
| CN103366495A (en) * | 2013-07-11 | 2013-10-23 | 合肥工业大学 | Air-breathing high-sensitivity smoke particle detector and application thereof |
| CN108765859A (en) * | 2018-06-19 | 2018-11-06 | 郑州坤博科技有限公司 | A kind of smoke-temperature sensing fire detector |
Non-Patent Citations (2)
| Title |
|---|
| LIU BAIFEN等: "Design Intelligent Multi-sensor Fire Monitoring Based on DSP", 《2007 8TH INTERNATIONAL CONFERENCE ON ELECTRONIC MEASUREMENT AND INSTRUMENTS》 * |
| 李东亭 等: "岷江犍为航电枢纽火灾自动报警系统设计", 《红水河》 * |
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