CN113538837A - Photoelectric smoke detection method, photoelectric smoke detection device and computer readable storage medium - Google Patents
Photoelectric smoke detection method, photoelectric smoke detection device and computer readable storage medium Download PDFInfo
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- CN113538837A CN113538837A CN202110771777.8A CN202110771777A CN113538837A CN 113538837 A CN113538837 A CN 113538837A CN 202110771777 A CN202110771777 A CN 202110771777A CN 113538837 A CN113538837 A CN 113538837A
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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
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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
- G08B17/107—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 for detecting light-scattering due to smoke
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- Fire-Detection Mechanisms (AREA)
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Abstract
The photoelectric smoke detection method, the photoelectric smoke detection device and the computer readable storage medium provided by the invention have the advantages that the output signal value of the photosensitive receiving circuit is collected in real time, whether smoke enters a labyrinth or not is judged by adopting the set first threshold, the set second threshold is used as an alarm drift compensation value, the alarm threshold can be corrected, the influence of dust on the alarm is reduced, the alarm sensitivity is improved, and meanwhile, the value of the second threshold can be corrected according to the output signal value. By adopting a dust compensation mode, the influence of dust on an alarm threshold value can be reduced through a theoretical algorithm, a maze does not need to be cleaned frequently, and the use is convenient.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of photoelectric smoke sensing technologies, and in particular, to a photoelectric smoke sensing detection method, a detection device, and a computer-readable storage medium.
[ background of the invention ]
The photoelectric smoke detector utilizes the scattering principle of smoke particles to light, an infrared transmitting circuit and a photosensitive receiving circuit are arranged in a labyrinth, when no smoke particles exist in the labyrinth, ambient light outside a shell of the photoelectric smoke detector is blocked by the labyrinth and basically cannot enter the labyrinth, the photosensitive receiving circuit can only receive background light formed by infrared light beams reflected in a sensitive space for many times, and therefore, no light current is generated, and the circuit is in a normal monitoring working state; when smoke particles enter a sensitive space surrounded by a maze, the smoke particles absorb incident light and emit light to the surroundings with the same wavelength, after part of scattered light is received by a photosensitive receiving circuit, the impedance of a light receiving element is changed to form light current, the light current is amplified by a small signal amplifying circuit and then is sent to an analog-digital conversion module, and when the light current is high to a certain degree, the value output by a small signal amplifying circuit reaches an alarm threshold value, an alarm is generated. The photoelectric smoke detector is easy to accumulate dust in a maze during long-time use, influences the sensitivity of an infrared light transmitting circuit and a photosensitive receiving circuit, and is easy to generate false alarm. Therefore, it is necessary to provide a photoelectric smoke detection method and a photoelectric smoke detection device to solve the above problems.
[ summary of the invention ]
The invention discloses a photoelectric smoke detection method and a detection device, which can collect output signal values in real time, compensate alarm threshold values and avoid false alarm caused by dust accumulation.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a photoelectric smoke detection method comprises the following steps:
s1: initializing a photoelectric smoke detector, and controlling an infrared light transmitting circuit to transmit infrared light once at fixed intervals;
s2: continuously collecting output signal values of the photosensitive receiving circuit for n times in any short time period to form n sampling data;
s3: calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, if not, retaining the n sampling data in the short time period to form sample data; if so, resetting the sampling data of the short time period and all the sample data before the short time period;
s4: collecting a plurality of sample data sets in a short continuous time period, forming the sample data sets into a sample set, calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; if so, increasing the value of the second threshold;
s5: and (3) subtracting the alarm drift compensation value from the output signal value of the photosensitive receiving circuit to obtain an actual output signal value aiming at any one time of smoke detection, judging whether the actual output signal value reaches an alarm threshold value, and if so, outputting an alarm.
Preferably, the step S2 includes the following steps:
s21: the photosensitive receiving circuit receives infrared light emitted by the infrared light emitting circuit, a light receiving component in the photosensitive receiving circuit resists change to form photocurrent, and the photocurrent is amplified by the amplifying circuit and then output to the analog-to-digital conversion module to obtain a digital signal;
and S22, in any short time period, the light sensor continuously collects the output signal values of the light-sensitive receiving circuit for n times, wherein the output signal values are the values of the digital signals.
Preferably, the first threshold and the second threshold are both smaller than the alarm threshold.
Preferably, in step S4, the maximum value of the second threshold is a third threshold, and when the value of the second threshold reaches the third threshold, the labyrinth is cleaned and the photoelectric smoke detector is reinitialized.
The invention also provides a photoelectric smoke detection device which is matched with the photoelectric smoke detector for use, wherein the photoelectric smoke detector comprises an infrared light transmitting circuit, a microprocessor and a photosensitive receiving circuit, and the infrared light transmitting circuit is used for transmitting infrared light; the microprocessor is used for controlling the infrared light transmitting circuit to transmit infrared light once at fixed intervals; the photosensitive receiving circuit is used for receiving the infrared light emitted by the infrared emitting circuit to form an output signal value; the photoelectric smoke detection device comprises:
the data acquisition module is used for continuously acquiring output signal values of the photosensitive receiving circuit for n times in any short time period to form n sampling data; collecting a plurality of short continuous time periods, and forming a sample set by a plurality of sample data sets;
the processing module is used for calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, and if not, retaining the n sampling data in the short time period to form sample data; if so, resetting the sampling data of the short time period and all the sample data before the short time period; calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; if so, increasing the value of the second threshold; for any one time of smoke detection, subtracting the alarm drift compensation value from the output signal value of the photosensitive receiving circuit to obtain an actual output signal value, and judging whether the actual output signal value reaches an alarm threshold value;
and the alarm module is used for outputting an alarm.
Preferably, the photosensitive receiving circuit includes:
the receiving circuit is used for receiving the infrared light emitted by the infrared light emitting circuit to form photocurrent;
an integral amplification circuit for amplifying the photocurrent;
and the digital-to-analog conversion module is used for converting the amplified photocurrent into a digital signal to form an output signal value, wherein the output signal value is the value of the digital signal.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described photo-electric smoke detection method.
Compared with the prior art, the photoelectric smoke detection method, the photoelectric smoke detection device and the computer readable storage medium provided by the invention have the advantages that the output signal value of the photosensitive receiving circuit is collected in real time, whether smoke enters a labyrinth or not is judged by adopting the set first threshold, the set second threshold is used as an alarm drift compensation value, the alarm threshold can be corrected, the influence of dust on the alarm is reduced, the alarm sensitivity is improved, and meanwhile, the value of the second threshold can be corrected according to the output signal value. It can be understood that the dust compensation mode is adopted, the influence of dust on the alarm threshold value can be reduced through a theoretical algorithm, the maze does not need to be cleaned frequently, and the use is convenient.
[ detailed description ] embodiments
The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual values, and between the individual values may be combined with each other to yield one or more new ranges of values, which ranges of values should be considered as specifically disclosed herein.
The invention provides a photoelectric smoke detection method, which comprises the following steps:
s1: initializing the photoelectric smoke detector, and controlling the infrared light transmitting circuit to transmit infrared light once at fixed intervals.
The infrared light emitting circuit emits infrared light once at fixed intervals to form a periodic emitting mode, continuous real-time monitoring is guaranteed, meanwhile, the working time of the infrared light emitting circuit can be shortened, and the service life is prolonged. The interval time between two adjacent transmissions can be selected according to actual needs, and in this embodiment, the interval time between two adjacent transmissions of the infrared light transmitting circuit is 1 second.
S2 continuously collects n times of output signal values of the photoreceiving circuit in any short time period, and forms n pieces of sampled data.
Step S2 specifically includes:
s21: the photosensitive receiving circuit receives infrared light emitted by the infrared light emitting circuit, a light receiving component in the photosensitive receiving circuit resists change to form photocurrent, and the photocurrent is amplified by the amplifying circuit and then output to the analog-to-digital conversion module to obtain a digital signal;
and S22, in any short time period, the light sensor continuously collects the output signal values of the light-sensitive receiving circuit for n times, wherein the output signal values are the values of the digital signals.
The output signal value of the photosensitive receiving circuit is in positive correlation with the content of particles in the maze, and the output signal value is used for reflecting the content of the particles in the maze in real time, wherein the particles can be smoke or dust.
S3: calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, if not, retaining the n sampling data in the short time period to form sample data; if yes, the sampling data of the short time period and all the sampling data before the short time period are cleared.
The first threshold is an empirical value set based on past usage experience, and is smaller than the alarm threshold. The first threshold is set for judging whether smoke enters the labyrinth or not, and when the average value of the n sampling data reaches (is greater than or equal to) the first threshold in a short time period, the fact that smoke enters the labyrinth is indicated. Since the dust content is usually small and requires some time to accumulate to reach a larger content. Therefore, in a short period of time, if the average value of the n sampled data exceeds the first threshold value, it indicates that smoke enters the labyrinth, and the smoke is discharged to carry away dust, so that the dust in the labyrinth can be controlled to be maintained at a low level, and the influence of the dust in the labyrinth on the sampled data is small, and the sampling needs to be carried out again. If the average value of the n sampling data does not reach the first threshold value, it indicates that no smoke enters the labyrinth, and the labyrinth is in a relatively static state at the moment, so that dust is easy to accumulate gradually in the labyrinth, and therefore the sampling data needs to be reserved to facilitate the compensation of the subsequent calculation of the content of the dust on the alarm threshold value.
S4: collecting a plurality of sample data sets in a short continuous time period, forming the sample data sets into a sample set, calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; and if so, increasing the value of the second threshold.
The output signal values are continuously acquired in a long time period, a sample set is gradually formed, if more data exist in the sample set, the maze is indicated to be in a relatively static state for a long time, and a large amount of dust is easily accumulated.
The initial value of the second threshold is also an empirical value, and the second threshold is smaller than the alarm threshold. And when the average value of all sample data in the sample set does not reach a second threshold value, taking the second threshold value as an alarm drift compensation value. The average value of all sample data in the sample set reflects the average content of dust in the maze, when the average value of all sample data in the sample set does not reach the second threshold value, the sample data in the maze is less, the dust content in the maze is still at a lower level at the moment, but the alarm threshold value reflects the total content of all particles in the maze, once the dust is accumulated in the maze, the requirement on the content of smoke is reduced under the condition of equally triggering the alarm, so a small amount of smoke can trigger the alarm, and the alarm sensitivity is influenced. Therefore, the second threshold value is selected as a drift compensation value, the influence of the dust content on the alarm can be reduced, and the sensitivity of the alarm is improved. When the sample data in the sample set is more, it is indicated that no smoke enters the labyrinth for a long time, and the dust in the labyrinth has accumulated to a higher level, and at this time, the average value of the sample data in the sample set exceeds the second threshold, so that the second threshold needs to be adjusted, and the value of the second threshold is increased to realize the real-time adjustment of the second threshold.
The adjustment of the second threshold value can also set a third threshold value, namely, the maximum value of the second threshold value is the third threshold value, and when the value of the second threshold value reaches the third threshold value, the content of dust in the labyrinth is excessive, and the dust needs to be cleaned.
The invention also provides a photoelectric smoke detection device which is matched with the photoelectric smoke detector for use, wherein the photoelectric smoke detector comprises an infrared light transmitting circuit, a microprocessor and a photosensitive receiving circuit, and the infrared light transmitting circuit is used for transmitting infrared light; the microprocessor is used for controlling the infrared light transmitting circuit to transmit infrared light once at fixed intervals; and the photosensitive receiving circuit is used for receiving the infrared light emitted by the infrared emitting circuit to form an output signal value.
Specifically, the photosensitive receiving circuit includes:
the receiving circuit is used for receiving the infrared light emitted by the infrared light emitting circuit to form photocurrent;
an integral amplification circuit for amplifying the photocurrent;
and the digital-to-analog conversion module is used for converting the amplified photocurrent into a digital signal to form an output signal value, wherein the output signal value is the value of the digital signal.
The photoelectric smoke detection device comprises:
the data acquisition module is used for continuously acquiring output signal values of the photosensitive receiving circuit for n times in any short time period to form n sampling data; collecting a plurality of short continuous time periods, and forming a sample set by a plurality of sample data sets;
the processing module is used for calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, and if not, retaining the n sampling data in the short time period to form sample data; if so, resetting the sampling data of the short time period and all the sample data before the short time period; calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; if so, increasing the value of the second threshold; for any one time of smoke detection, subtracting the alarm drift compensation value from the output signal value of the photosensitive receiving circuit to obtain an actual output signal value, and judging whether the actual output signal value reaches an alarm threshold value;
and the alarm module is used for outputting an alarm.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described tool wear detection and compensation method. The computer readable storage medium described herein may be a hard disk, an optical disk, a magnetic tape, a usb disk, a flash drive, etc., which can be read by a computer. The computer readable storage medium has stored therein a program that can implement the tool wear detection and compensation described above.
Compared with the prior art, the photoelectric smoke detection method, the photoelectric smoke detection device and the computer readable storage medium provided by the invention have the advantages that the output signal value of the photosensitive receiving circuit is collected in real time, whether smoke enters a labyrinth or not is judged by adopting the set first threshold, the set second threshold is used as an alarm drift compensation value, the alarm threshold can be corrected, the influence of dust on the alarm is reduced, the alarm sensitivity is improved, and meanwhile, the value of the second threshold can be corrected according to the output signal value. It can be understood that the dust compensation mode is adopted, the influence of dust on the alarm threshold value can be reduced through a theoretical algorithm, the maze does not need to be cleaned frequently, and the use is convenient.
Claims (7)
1. A photoelectric smoke detection method is characterized by comprising the following steps:
s1: initializing a photoelectric smoke detector, and controlling an infrared light transmitting circuit to transmit infrared light once at fixed intervals;
s2: continuously collecting output signal values of the photosensitive receiving circuit for n times in any short time period to form n sampling data;
s3: calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, if not, retaining the n sampling data in the short time period to form sample data; if so, resetting the sampling data of the short time period and all the sample data before the short time period;
s4: collecting a plurality of sample data sets in a short continuous time period, forming the sample data sets into a sample set, calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; if so, increasing the value of the second threshold;
s5: and (3) subtracting the alarm drift compensation value from the output signal value of the photosensitive receiving circuit to obtain an actual output signal value aiming at any one time of smoke detection, judging whether the actual output signal value reaches an alarm threshold value, and if so, outputting an alarm.
2. The method according to claim 1, wherein the step S2 includes the steps of:
s21: the photosensitive receiving circuit receives infrared light emitted by the infrared light emitting circuit, a light receiving component in the photosensitive receiving circuit resists change to form photocurrent, and the photocurrent is amplified by the amplifying circuit and then output to the analog-to-digital conversion module to obtain a digital signal;
and S22, in any short time period, the light sensor continuously collects the output signal values of the light-sensitive receiving circuit for n times, wherein the output signal values are the values of the digital signals.
3. The method and apparatus of claim 2, wherein the first threshold and the second threshold are both less than the alarm threshold.
4. The method and apparatus according to claim 3, wherein in step S4, the maximum value of the second threshold is a third threshold, and when the value of the second threshold reaches the third threshold, the maze is cleared and the photoelectric smoke detector is reinitialized.
5. A photoelectric smoke detection device is used in cooperation with a photoelectric smoke detector, wherein the photoelectric smoke detector comprises an infrared light transmitting circuit, a microprocessor and a photosensitive receiving circuit, and the infrared light transmitting circuit is used for transmitting infrared light; the microprocessor is used for controlling the infrared light transmitting circuit to transmit infrared light once at fixed intervals; the photosensitive receiving circuit is used for receiving the infrared light emitted by the infrared emitting circuit to form an output signal value; characterized in that, the photoelectric smoke detection device includes:
the data acquisition module is used for continuously acquiring output signal values of the photosensitive receiving circuit for n times in any short time period to form n sampling data; collecting a plurality of short continuous time periods, and forming a sample set by a plurality of sample data sets;
the processing module is used for calculating the average value of the n sampling data, judging whether the average value reaches a preset first threshold value, and if not, retaining the n sampling data in the short time period to form sample data; if so, resetting the sampling data of the short time period and all the sample data before the short time period; calculating the average value of all sample data in the sample set, judging whether the average value reaches a preset second threshold value, and if not, taking the second threshold value as an alarm drift compensation value; if so, increasing the value of the second threshold; for any one time of smoke detection, subtracting the alarm drift compensation value from the output signal value of the photosensitive receiving circuit to obtain an actual output signal value, and judging whether the actual output signal value reaches an alarm threshold value;
and the alarm module is used for outputting an alarm.
6. The photoelectric smoke detection apparatus of claim 5, wherein the photosensitive receiving circuit comprises:
the receiving circuit is used for receiving the infrared light emitted by the infrared light emitting circuit to form photocurrent;
an integral amplification circuit for amplifying the photocurrent;
and the digital-to-analog conversion module is used for converting the amplified photocurrent into a digital signal to form an output signal value, wherein the output signal value is the value of the digital signal.
7. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method for photoelectric smoke detection according to any one of claims 1-4.
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| CN202110771777.8A CN113538837B (en) | 2021-07-08 | 2021-07-08 | Photoelectric smoke detection method, photoelectric smoke detection device and computer readable storage medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283554A (en) * | 2022-01-17 | 2022-04-05 | 深圳市海曼科技股份有限公司 | Dust pollution compensation method, device, equipment and medium |
| CN114495409A (en) * | 2021-12-20 | 2022-05-13 | 哲弗智能系统（上海）有限公司 | Smoke sensor sensitivity compensation method, device and system and storage medium |
| CN115880851A (en) * | 2022-11-28 | 2023-03-31 | 力高(山东)新能源技术股份有限公司 | Smoke detection method |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0094534A1 (en) * | 1982-05-13 | 1983-11-23 | Cerberus Ag | Smoke detector according to the radiation-extinction principle |
| USRE34704E (en) * | 1983-10-21 | 1994-08-23 | Cole Martin T | Improved pollution detection apparatus |
| JP2008083923A (en) * | 2006-09-27 | 2008-04-10 | Yazaki Corp | Fire alarm |
| US20100085199A1 (en) * | 2008-10-03 | 2010-04-08 | Universal Security Instruments, Inc. | Dynamic Alarm Sensitivity Adjustment and Auto-Calibrating Smoke Detection |
| US20110018726A1 (en) * | 2008-10-03 | 2011-01-27 | Universal Security Instruments, Inc. | Dynamic Alarm Sensitivity Adjustment and Auto-Calibrating Smoke Detection |
| US20140015680A1 (en) * | 2012-07-13 | 2014-01-16 | Walter Kidde Portable Equipment, Inc. | Photoelectric smoke detector with drift compensation |
| CN104067325A (en) * | 2011-12-14 | 2014-09-24 | 密克罗奇普技术公司 | Method and apparatus for detecting smoke in an ion chamber |
| US20160042638A1 (en) * | 2014-08-05 | 2016-02-11 | Google Inc. | Systems and methods for compensating for sensor drift in a hazard detection system |
| US20180158313A1 (en) * | 2015-05-01 | 2018-06-07 | Thorn Security Limited | Fire Detector Drift Compensation |
| CN110632030A (en) * | 2019-10-21 | 2019-12-31 | 北京国泰怡安电子有限公司 | Point type photoelectric smoke detector with same sensitivity for black smoke and white smoke and detection method thereof |
| CN111406991A (en) * | 2019-09-26 | 2020-07-14 | 深圳市艾维普思科技有限公司 | Control method of electronic cigarette, storage medium and electronic cigarette |
| CN112066433A (en) * | 2020-08-31 | 2020-12-11 | 上海永亚智能科技有限公司 | Automatic gear control method of range hood |
| CN112447018A (en) * | 2019-09-02 | 2021-03-05 | 上海昊想智能科技有限公司 | System with dynamically adjusted smoke sensation threshold value and adjusting method |
-
2021
- 2021-07-08 CN CN202110771777.8A patent/CN113538837B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0094534A1 (en) * | 1982-05-13 | 1983-11-23 | Cerberus Ag | Smoke detector according to the radiation-extinction principle |
| USRE34704E (en) * | 1983-10-21 | 1994-08-23 | Cole Martin T | Improved pollution detection apparatus |
| JP2008083923A (en) * | 2006-09-27 | 2008-04-10 | Yazaki Corp | Fire alarm |
| US20100085199A1 (en) * | 2008-10-03 | 2010-04-08 | Universal Security Instruments, Inc. | Dynamic Alarm Sensitivity Adjustment and Auto-Calibrating Smoke Detection |
| US20110018726A1 (en) * | 2008-10-03 | 2011-01-27 | Universal Security Instruments, Inc. | Dynamic Alarm Sensitivity Adjustment and Auto-Calibrating Smoke Detection |
| CN104067325A (en) * | 2011-12-14 | 2014-09-24 | 密克罗奇普技术公司 | Method and apparatus for detecting smoke in an ion chamber |
| US20140015680A1 (en) * | 2012-07-13 | 2014-01-16 | Walter Kidde Portable Equipment, Inc. | Photoelectric smoke detector with drift compensation |
| US20160042638A1 (en) * | 2014-08-05 | 2016-02-11 | Google Inc. | Systems and methods for compensating for sensor drift in a hazard detection system |
| US20160232781A1 (en) * | 2014-08-05 | 2016-08-11 | Google Inc. | Systems and methods for compensating for sensor drift in a hazard detection system |
| US20180158313A1 (en) * | 2015-05-01 | 2018-06-07 | Thorn Security Limited | Fire Detector Drift Compensation |
| CN112447018A (en) * | 2019-09-02 | 2021-03-05 | 上海昊想智能科技有限公司 | System with dynamically adjusted smoke sensation threshold value and adjusting method |
| CN111406991A (en) * | 2019-09-26 | 2020-07-14 | 深圳市艾维普思科技有限公司 | Control method of electronic cigarette, storage medium and electronic cigarette |
| CN110632030A (en) * | 2019-10-21 | 2019-12-31 | 北京国泰怡安电子有限公司 | Point type photoelectric smoke detector with same sensitivity for black smoke and white smoke and detection method thereof |
| CN112066433A (en) * | 2020-08-31 | 2020-12-11 | 上海永亚智能科技有限公司 | Automatic gear control method of range hood |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114495409A (en) * | 2021-12-20 | 2022-05-13 | 哲弗智能系统（上海）有限公司 | Smoke sensor sensitivity compensation method, device and system and storage medium |
| CN114495409B (en) * | 2021-12-20 | 2024-07-09 | 哲弗智能系统（上海）有限公司 | Smoke sensor sensitivity compensation method, device, system and storage medium |
| CN114283554A (en) * | 2022-01-17 | 2022-04-05 | 深圳市海曼科技股份有限公司 | Dust pollution compensation method, device, equipment and medium |
| CN114283554B (en) * | 2022-01-17 | 2023-09-08 | 深圳市海曼科技股份有限公司 | Compensation method, device and equipment for dust pollution and medium |
| CN115880851A (en) * | 2022-11-28 | 2023-03-31 | 力高(山东)新能源技术股份有限公司 | Smoke detection method |
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| CN113538837B (en) | 2022-09-13 |
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