CN110595969A - Control method and device of PM2.5 sensor, electric appliance and storage medium - Google Patents

Control method and device of PM2.5 sensor, electric appliance and storage medium Download PDF

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Publication number
CN110595969A
CN110595969A CN201910898041.XA CN201910898041A CN110595969A CN 110595969 A CN110595969 A CN 110595969A CN 201910898041 A CN201910898041 A CN 201910898041A CN 110595969 A CN110595969 A CN 110595969A
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China
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sensor
concentration value
change rate
concentration
time period
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CN110595969B (en
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李炳炳
孙海波
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G01N15/075

Abstract

The invention provides a control method and device of a PM2.5 sensor, an electric appliance and a storage medium, and relates to the field of electric appliances. The control method of the PM2.5 sensor comprises the following steps: controlling a PM2.5 sensor to operate for a first time period, and detecting a first PM2.5 concentration value in the first time period through the PM2.5 sensor; controlling the PM2.5 sensor to pause and wait for a second time; controlling the PM2.5 sensor to operate again for the first time period, and detecting a second PM2.5 concentration value in the first time period through the PM2.5 sensor; determining a rate of change of PM2.5 concentration values from the first PM2.5 concentration value and the second PM2.5 concentration value; and comparing the change rate with the calibration change rate, and adjusting the second duration according to the comparison result. According to the control method, the control device, the electrical appliance and the storage medium of the PM2.5 sensor, the change rate of the concentration value of PM2.5 is determined by comparing the concentration values of PM2.5 in two adjacent operation periods, and the problem of service life attenuation of the PM2.5 sensor caused by the light attenuation phenomenon is effectively solved.

Description

Control method and device of PM2.5 sensor, electric appliance and storage medium
Technical Field
The invention relates to the field of electric appliances, in particular to a control method and device of a PM2.5 sensor, an electric appliance and a storage medium.
Background
In the current household appliances, a commonly used PM2.5 sensor detects the PM2.5 particle concentration through infrared or laser, because of the light attenuation phenomenon, when the PM2.5 sensor works for a long time, the light attenuation can cause the reduction of the luminous intensity, and the PM2.5 sensor detects the PM2.5 particle concentration by detecting the reflected light of the PM2.5 particles in the air flow, therefore, the light attenuation phenomenon can cause the reduction of the measurement precision of the PM2.5 sensor, which leads to the reduction of the service life of the PM2.5 sensor, and the PM2.5 sensor needs to be frequently replaced to ensure the measurement accuracy.
Disclosure of Invention
The invention solves the problem that the measurement accuracy of the PM2.5 sensor is reduced due to light attenuation.
In order to solve the above problem, the present invention provides a method for controlling a PM2.5 sensor, comprising the steps of: controlling a PM2.5 sensor to operate for a first time period, and detecting a first PM2.5 concentration value in the first time period through the PM2.5 sensor; controlling the PM2.5 sensor to pause and wait for a second time; controlling the PM2.5 sensor to operate again for the first time period, and detecting a second PM2.5 concentration value in the first time period through the PM2.5 sensor; determining a rate of change of PM2.5 concentration values from the first PM2.5 concentration value and the second PM2.5 concentration value; and comparing the change rate with the calibration change rate, and adjusting the second duration according to the comparison result.
According to the control method of the PM2.5 sensor, the change rate of the concentration value of PM2.5 is determined by comparing the concentration values of PM2.5 in two adjacent operation periods, the change rate of the concentration value of PM2.5 is compared with the calibration change rate, the second time length is adjusted according to the comparison result, and the problem of service life attenuation of the PM2.5 sensor caused by the light attenuation phenomenon is effectively solved.
Preferably, the detecting, by the PM2.5 sensor, the first PM2.5 concentration value within the first duration specifically includes: continuously collecting the concentration value of PM2.5 for multiple times by the PM2.5 sensor in the first time period; and averaging the PM2.5 concentration values collected continuously for multiple times to obtain the first PM2.5 concentration value.
According to the control method of the PM2.5 sensor, the concentration value of PM2.5 is continuously collected for multiple times within the first time period, so that the accuracy and the effectiveness of control over the PM2.5 sensor are improved.
Preferably, the control method of the PM2.5 sensor further includes the steps of: and respectively filtering the continuously and repeatedly acquired PM2.5 concentration values, and averaging the filtered repeatedly acquired PM2.5 concentration values to obtain the first PM2.5 concentration value.
According to the control method of the PM2.5 sensor, signal interference when the PM2.5 concentration value is collected is effectively reduced by filtering the PM2.5 concentration value, the real-time performance and the accuracy of the PM2.5 concentration value are improved, and the accuracy and the effectiveness of control over the PM2.5 sensor are improved.
Preferably, the adjusting the second duration according to the comparison result specifically includes: when the change rate is larger than the calibration change rate, reducing the second duration; when the change rate is within the calibrated change rate, keeping the second duration unchanged; and when the change rate is smaller than the calibration change rate, increasing the second duration.
According to the control method of the PM2.5 sensor, the second duration is adjusted by comparing the change rate of the concentration value of the PM2.5 with the calibration change rate, so that the problem of service life attenuation caused by long-term operation of the PM2.5 sensor is effectively solved.
Preferably, the control method of the PM2.5 sensor further includes the steps of: and after the second time length is adjusted according to the comparison result, when the PM2.5 sensor continuously operates for the first time length again and then stops operating, the waiting time length is the adjusted second time length.
According to the control method of the PM2.5 sensor, the second time length is adjusted after the concentration value of PM2.5 is detected every time, on the basis of meeting the requirements of detecting the concentration value of PM2.5 and accurately informing the risk of PM2.5 concentration, the stop waiting time of the PM2.5 sensor is increased as much as possible, and the problem of service life attenuation of the PM2.5 sensor caused by the light attenuation phenomenon is solved.
Preferably, controlling the PM2.5 sensor to operate includes controlling power to the PM2.5 sensor to be turned on, and controlling the PM2.5 sensor to suspend operation includes controlling power to the PM2.5 sensor to be turned off.
According to the control method of the PM2.5 sensor, the operation and the suspended operation of the PM2.5 sensor are controlled by switching on and off the power supply of the PM2.5 sensor, so that the PM2.5 sensor is effectively controlled in time, and the control strength of the PM2.5 sensor is effectively improved.
The present invention also provides a control device of a PM2.5 sensor, including: a detection unit for detecting a PM2.5 concentration value; a calculation unit for calculating a variation rate of the PM2.5 concentration value; the judging unit is used for comparing the change rate of the PM2.5 concentration value with the magnitude of the calibration change rate; and the control unit is used for adjusting the size of the second time length for the PM2.5 sensor to pause and wait according to the comparison result.
Compared with the prior art, the control device of the PM2.5 sensor and the control method of the PM2.5 sensor have the same advantages, and are not repeated herein.
The invention also provides a control device of the PM2.5 sensor, which comprises a memory and a processor: the memory for storing a computer program; the processor is configured to implement the control method of the PM2.5 sensor according to any one of the above embodiments when executing the computer program.
Compared with the prior art, the control device of the PM2.5 sensor and the control method of the PM2.5 sensor have the same advantages, and are not repeated herein.
The invention also provides an electric appliance comprising the control device of the PM2.5 sensor.
Compared with the prior art, the advantages of the electric appliance and the control method of the PM2.5 sensor are the same, and are not described again.
The invention also provides a computer-readable storage medium, which stores a computer program, which, when read and executed by a processor, implements the control method of the PM2.5 sensor according to any one of the above.
The advantages of the computer readable storage medium and the control method of the PM2.5 sensor are the same as those of the prior art, and are not described herein again.
Drawings
FIG. 1 illustrates a control method for a PM2.5 sensor according to an embodiment of the invention;
FIG. 2 is a diagram illustrating one embodiment of a PM2.5 sensor control apparatus according to the present invention;
fig. 3 shows a second control device of the PM2.5 sensor according to the embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, an embodiment of the present invention provides a method for controlling a PM2.5 sensor, including the following steps: controlling a PM2.5 sensor to operate for a first time period, and detecting a first PM2.5 concentration value in the first time period through the PM2.5 sensor; controlling the PM2.5 sensor to pause and wait for a second time; controlling the PM2.5 sensor to operate again for the first time period, and detecting a second PM2.5 concentration value in the first time period through the PM2.5 sensor; determining a rate of change of PM2.5 concentration values from the first PM2.5 concentration value and the second PM2.5 concentration value; and comparing the change rate with the calibration change rate, and adjusting the second duration according to the comparison result.
Specifically, in the present embodiment, the control method of the PM2.5 sensor includes that the PM2.5 sensor operates for a first time period, for example, operates for 20s, and during the 20s period, the PM2.5 sensor detects a concentration value of PM2.5, which is regarded as a first concentration value of PM 2.5; and then controlling the PM2.5 sensor to pause, waiting for a second time period, such as 10s, and providing a shutdown waiting time for the PM2.5 sensor, which is beneficial to reducing the PM2.5 sensor life decay problem caused by the light decay phenomenon.
Then, the PM2.5 sensor waits for the second time period to operate again, operates for the first time period, for example, for 20s, and detects the concentration value of PM2.5 through the PM2.5 sensor during the 20s period, which is regarded as a second PM2.5 concentration value; to this end, data of PM2.5 concentration values of two adjacent working periods are obtained, and then a rate of change of the PM2.5 concentration value is determined according to a first PM2.5 concentration value and a second PM2.5 concentration value, for example, if the first PM2.5 concentration value is 30 micrograms/cubic meter, and the second PM2.5 concentration value is 45 micrograms/cubic meter, then the rate of change of the PM2.5 concentration value is determined to be 0.5.
Then, adjusting a second time length according to the change rate of the concentration value of the PM2.5 and the magnitude of the calibration change rate, for example, the calibration change rate is in a range of-0.1 to 0.1, if the change rate of the concentration value of the PM2.5 is 0.5, it is indicated that the PM2.5 is in a deterioration trend, which may cause irreversible damage to a human body, and the PM2.5 sensor needs to be frequently operated to ensure that the concentration value data and the change rate of the PM2.5 are obtained at any moment, so that the second time length is adjusted to be small, and the downtime waiting time of the PM2.5 sensor is reduced, for example, to be reduced to 5s on the basis of 10 s; if the variation rate of the concentration value of PM2.5 is 0, the concentration value of PM2.5 at the moment tends to be stable, and the method only needs to be executed according to the previous running time and the previous shutdown time period; if the variation rate of the concentration value of PM2.5 is-0.5, it indicates that the concentration value of PM2.5 is in the trend of decreasing, and at this time, the downtime of the PM2.5 sensor can be increased, for example, to 20s on the basis of 10s, so as to reduce the problem of the lifetime degradation of the PM2.5 sensor caused by the light decay phenomenon.
In this embodiment, only the processes of detecting and comparing the concentration values of PM2.5 for the first time and the second time are shown, and it should be understood that, taking the third time for detecting the concentration value of PM2.5 as an example, the second time for detecting the concentration value of PM2.5 is compared with the third time for detecting the concentration value of PM2.5 to determine the change rate of the concentration value of PM2.5, and the change rate is compared with the calibration change rate, the second time length is adjusted according to the comparison result, and when the next time the PM2.5 sensor stops operating, the second time length is waited according to the adjusted second time length; the fourth and the following detection and comparison processes are not repeated, and the detection, comparison and adjustment processes are executed.
In the control method of the PM2.5 sensor described in this embodiment, the change rate of the concentration value of PM2.5 is determined by comparing the concentration values of PM2.5 in two adjacent operating periods, the change rate of the concentration value of PM2.5 is compared with the calibration change rate, the second duration is adjusted according to the comparison result, and the problem of the decay of the service life of the PM2.5 sensor caused by the light decay phenomenon is effectively reduced.
Preferably, the detecting, by the PM2.5 sensor, the first PM2.5 concentration value within the first duration specifically includes: continuously collecting the concentration value of PM2.5 for multiple times by the PM2.5 sensor in the first time period; and averaging the PM2.5 concentration values collected continuously for multiple times to obtain the first PM2.5 concentration value.
Specifically, referring to fig. 1, in this embodiment, a specific process of detecting a first PM2.5 concentration value in a first duration by a PM2.5 sensor includes: within a first time period, continuously collecting the concentration values of PM2.5 for multiple times through a PM2.5 sensor, for example, collecting the concentration values of PM2.5 every 1s within 20s, and then averaging 21 collected concentration values of PM2.5 to obtain a first concentration value of PM 2.5.
In addition, the average operation is also adopted for detecting the concentration value of PM2.5 for the second time and any subsequent time; through continuously and repeatedly collecting the PM2.5 concentration value within the first time period, the measured data can more accurately reflect the PM2.5 concentration value data in the collecting period, and therefore the accuracy and the effectiveness of the control of the PM2.5 sensor are improved.
According to the control method of the PM2.5 sensor, the accuracy and the effectiveness of control over the PM2.5 sensor are improved by continuously collecting the concentration value of the PM2.5 for multiple times within the first time period.
Preferably, the control method of the PM2.5 sensor further includes the steps of: and respectively filtering the continuously and repeatedly acquired PM2.5 concentration values, and averaging the filtered repeatedly acquired PM2.5 concentration values to obtain the first PM2.5 concentration value.
Specifically, as shown in fig. 1, in this embodiment, since the signal measured by the PM2.5 sensor includes a concentration signal fed back by other impurities, filtering is required, and other signals except the PM2.5 concentration signal are removed, so that PM2.5 concentration values are obtained through continuous multiple acquisition, signals corresponding to multiple PM2.5 concentration values are respectively filtered, and then the filtered multiple PM2.5 concentration values are averaged to obtain the first PM2.5 concentration value.
Wherein, the filtering operation is also adopted for detecting the concentration value of PM2.5 for the second time and any subsequent time; through filtering operation, signal interference when the PM2.5 concentration value is collected is effectively reduced, the real-time performance and accuracy of the PM2.5 concentration value are improved, and the accuracy and effectiveness of control over the PM2.5 sensor are improved.
According to the control method of the PM2.5 sensor, the PM2.5 concentration value is filtered, so that signal interference when the PM2.5 concentration value is collected is effectively reduced, the real-time performance and the accuracy of the PM2.5 concentration value are improved, and the accuracy and the effectiveness of control over the PM2.5 sensor are improved.
Preferably, the adjusting the second duration according to the comparison result specifically includes: when the change rate is larger than the calibration change rate, reducing the second duration; when the change rate is within the calibrated change rate, keeping the second duration unchanged; and when the change rate is smaller than the calibration change rate, increasing the second duration.
Specifically, referring to fig. 1, in this embodiment, the adjusting the second duration according to the comparison result includes: when the change rate of the concentration value of PM2.5 is greater than the calibration change rate, for example, the calibration change rate is in the range of-0.1 to 0.1, if the change rate of the concentration value of PM2.5 is 0.5, the second time length needs to be reduced to improve the effective working time of the concentration value of PM2.5 and more accurately and timely reflect the data of the concentration value of PM2.5 in the worsening trend; when the variation rate of the concentration value of the PM2.5 is within the calibrated variation rate, for example, the variation rate of the concentration value of the PM2.5 is 0, which indicates that the concentration value of the PM2.5 at this time tends to be stable, and the second time length is kept unchanged, i.e., the second time length is not adjusted; when the change rate of the concentration value of the PM2.5 is smaller than the calibration change rate, for example, the change rate of the concentration value of the PM2.5 is-0.5, which indicates that the concentration value of the PM2.5 is in a decreasing trend, the stop waiting time of the PM2.5 sensor can be increased, namely the second time length is increased, so that the problem of life decay caused by long-term operation of the PM2.5 sensor is solved.
According to the control method of the PM2.5 sensor, the second duration is adjusted by comparing the change rate of the concentration value of the PM2.5 with the calibration change rate, so that the problem of life decay caused by long-term operation of the PM2.5 sensor is effectively solved.
Preferably, the control method of the PM2.5 sensor further includes the steps of: and after the second time length is adjusted according to the comparison result, when the PM2.5 sensor continuously operates for the first time length again and then stops operating, the waiting time length is the adjusted second time length.
Specifically, referring to fig. 1, in this embodiment, the method for controlling the PM2.5 sensor further includes, after adjusting the second duration according to the comparison result, waiting for the second duration after the next time when the PM2.5 sensor is controlled to pause; after the concentration value of PM2.5 is detected each time, the concentration value of PM2.5 needs to be compared with the calibrated change rate, the second time length is continuously adjusted according to the change of the concentration value of PM2.5, the actual measured concentration value of PM2.5 can be better adapted, and on the basis of meeting the requirement of detecting the concentration value of PM2.5, the shutdown waiting time of the PM2.5 sensor is increased as much as possible, so that the problem of service life attenuation of the PM2.5 sensor caused by the light attenuation phenomenon is solved.
In the control method of the PM2.5 sensor described in this embodiment, the second duration is adjusted after the PM2.5 concentration value is detected each time, and on the basis of meeting the requirements of detecting the PM2.5 concentration value and accurately informing the risk of the PM2.5 concentration, the downtime of the PM2.5 sensor is increased as much as possible, so as to reduce the problem of the life decay of the PM2.5 sensor caused by the light decay phenomenon.
Preferably, controlling the PM2.5 sensor to operate includes controlling power to the PM2.5 sensor to be turned on, and controlling the PM2.5 sensor to suspend operation includes controlling power to the PM2.5 sensor to be turned off.
Specifically, referring to fig. 1 and fig. 3, in this embodiment, the operation and the suspended operation of the PM2.5 sensor are controlled by the processor, and the processor executes the computer program stored in the memory and controls the operation and the suspended operation of the PM2.5 sensor, that is, the switch of the PM2.5 sensor, according to the first duration and the second duration, so that the PM2.5 sensor is effectively controlled in time, and the control strength of the PM2.5 sensor is effectively improved.
The control method of the PM2.5 sensor according to the embodiment controls the operation and the suspended operation of the PM2.5 sensor by switching on and off the power supply of the PM2.5 sensor, so that the PM2.5 sensor is effectively controlled in time, and the control strength of the PM2.5 sensor is effectively improved.
Another embodiment of the present invention provides a control apparatus for a PM2.5 sensor, as shown in fig. 2, including: a detection unit for detecting a PM2.5 concentration value; a calculation unit for calculating a variation rate of the PM2.5 concentration value; the judging unit is used for comparing the change rate of the PM2.5 concentration value with the magnitude of the calibration change rate; and the control unit is used for adjusting the size of the second time length for the PM2.5 sensor to pause and wait according to the comparison result.
Another embodiment of the present invention provides a control apparatus for a PM2.5 sensor, as shown in fig. 3, including a memory and a processor: the memory for storing a computer program; the processor is configured to implement the control method of the PM2.5 sensor according to any one of the above embodiments when executing the computer program.
It should be noted that the control device in this embodiment may be a computer device such as a micro-processing system.
Another embodiment of the present invention provides an electric appliance, including the control device of the PM2.5 sensor.
The electric appliances include household appliances such as an air conditioner, a refrigerator and a television.
Another embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the computer program implements the control method of the PM2.5 sensor according to any one of the above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A control method of a PM2.5 sensor is characterized by comprising the following steps:
controlling a PM2.5 sensor to operate for a first time period, and detecting a first PM2.5 concentration value in the first time period through the PM2.5 sensor;
controlling the PM2.5 sensor to pause and wait for a second time;
controlling the PM2.5 sensor to operate again for the first time period, and detecting a second PM2.5 concentration value in the first time period through the PM2.5 sensor;
determining a rate of change of PM2.5 concentration values from the first PM2.5 concentration value and the second PM2.5 concentration value;
and comparing the change rate with the calibration change rate, and adjusting the second duration according to the comparison result.
2. The method according to claim 1, wherein the detecting, by the PM2.5 sensor, the first PM2.5 concentration value in the first time period specifically includes:
continuously collecting the concentration value of PM2.5 for multiple times by the PM2.5 sensor in the first time period;
and averaging the PM2.5 concentration values collected continuously for multiple times to obtain the first PM2.5 concentration value.
3. The control method of the PM2.5 sensor according to claim 2, characterized by further comprising the steps of:
and respectively filtering the continuously and repeatedly acquired PM2.5 concentration values, and averaging the filtered repeatedly acquired PM2.5 concentration values to obtain the first PM2.5 concentration value.
4. The method according to claim 1, wherein the adjusting the second duration according to the comparison result specifically includes:
when the change rate is larger than the calibration change rate, reducing the second duration;
when the change rate is within the calibrated change rate, keeping the second duration unchanged;
and when the change rate is smaller than the calibration change rate, increasing the second duration.
5. The control method of the PM2.5 sensor according to any one of claims 1 to 4, characterized by further comprising the steps of:
and after the second time length is adjusted according to the comparison result, when the PM2.5 sensor continuously operates for the first time length again and then stops operating, the waiting time length is the adjusted second time length.
6. The method of claim 1, wherein controlling the PM2.5 sensor to operate comprises controlling power to the PM2.5 sensor to be turned on, and wherein controlling the PM2.5 sensor to suspend operation comprises controlling power to the PM2.5 sensor to be turned off.
7. A control device for a PM2.5 sensor, comprising:
a detection unit for detecting a PM2.5 concentration value;
a calculation unit for calculating a variation rate of the PM2.5 concentration value;
the judging unit is used for comparing the change rate of the PM2.5 concentration value with the magnitude of the calibration change rate;
and the control unit is used for adjusting the size of the second time length for the PM2.5 sensor to pause and wait according to the comparison result.
8. A control apparatus for a PM2.5 sensor, comprising a memory and a processor:
the memory for storing a computer program;
the processor, when executing the computer program, for implementing the method of controlling a PM2.5 sensor according to any of claims 1-6.
9. An electrical appliance, characterized by comprising a control device of the PM2.5 sensor according to claim 8.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the PM2.5 sensor control method according to any one of claims 1 to 6.
CN201910898041.XA 2019-09-23 2019-09-23 Control method and device of PM2.5 sensor, electric appliance and storage medium Active CN110595969B (en)

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