WO2018040603A1

WO2018040603A1 - Dust sensor, terminal, and method and device for calibrating dust sensor

Info

Publication number: WO2018040603A1
Application number: PCT/CN2017/082595
Authority: WO
Inventors: 周宏明; 沈志聪
Original assignee: 广东美的制冷设备有限公司; 美的集团股份有限公司
Priority date: 2016-08-31
Filing date: 2017-04-28
Publication date: 2018-03-08
Also published as: CN106383074A

Abstract

A dust sensor, a terminal, a method and device for calibrating a dust sensor. The method comprises: receiving an actual value of a dust concentration at a current location (S100); and calibrating, according to the actual value, an output value of the dust sensor (S120). The method is utilized to enable calibration of a dust sensor to become simpler, easier, and more user friendly.

Description

Dust sensor, terminal, method and device for calibrating dust sensor

Technical field

The invention relates to the field of dust, and in particular to a dust sensor, a terminal, a method and a device for calibrating a dust sensor.

Background technique

Dust sensors are devices that use MIE scattering theory to count or measure mass concentrations of suspended particles in the air. In general, the dust sensor comprises a wind guiding channel, a laser emitting tube and a photosensitive element, wherein the air flow flows in the air guiding channel, and the laser light is irradiated to generate scattered light when flowing over the photosensitive element, and the photosensitive element receives the scattered light and transmits the scattered light. Light is analyzed to obtain dust in the gas stream.

Specifically, the dust sensor first obtains the number of particles of corresponding size in the air. Taking PM2.5 as an example, the dust sensor first obtains the number of particles having a size of 2.5 micrometers or less, and then converts the number of particles into mass density by standard equipment, and the mass density is obtained. The unit is micrograms per cubic meter. In fact, the actual density of the main dust in different regions is different. In addition, the dust density of the airflow used for calibration in the laboratory or the production workshop is also different from the dust density in actual life, which makes the output of the dust sensor There are certain errors, and the performance of the dust sensor of the same product may vary in different regions.

The dust sensor itself may have a deviation during use for a period of time, but does not match the actual dust concentration value in the air. In addition, many people in life compare the output value of the dust sensor with the dust concentration broadcast value in the weather forecast, and judge the merits of the dust sensor by the magnitude of the difference. Therefore, the dust sensor needs to be calibrated so that its output value is substantially consistent with the actual dust concentration value.

Summary of the invention

It is an object of embodiments of the present invention to provide a method and apparatus for calibrating a dust sensor that calibrates the dust sensor such that the output value of the dust sensor is substantially consistent with the actual dust concentration value.

In order to achieve the above object, an embodiment of the present invention provides a method for calibrating a dust sensor, the method comprising: receiving an actual value of a dust concentration at a current location; and performing an output value of the dust sensor according to the actual value. calibration.

The calibrating the output value of the dust sensor according to the actual value comprises: reading a current output value of the dust sensor; calculating a calibration coefficient according to the actual value and the current output value; and using the calibration The coefficient is used to calibrate the output value of the dust sensor.

Optionally, the method further includes: sequentially receiving the multiple different times at the current location for multiple different times a plurality of actual values of the corresponding dust concentration; for the plurality of different times, sequentially reading the plurality of output values of the dust sensor corresponding to the plurality of different times; and according to the plurality of actual values and A plurality of output values are described to calibrate the output value of the dust sensor.

Optionally, the plurality of actual values and the plurality of output values are fitted to calibrate an output value of the dust sensor.

Correspondingly, an embodiment of the present invention further provides a method for calibrating a dust sensor, the method comprising: acquiring a current geographic location; and obtaining an actual value of a dust concentration at a current location from a meteorological monitoring point closest to the current geographic location. ; and send the actual value.

Optionally, the method further includes: sequentially acquiring, from the meteorological monitoring point, a plurality of actual values of the dust concentration corresponding to the plurality of different times for the specified multiple different times; and for the multiple different times Sending each of the plurality of actual values in sequence.

Optionally, the method further comprises: transmitting a calibration instruction after transmitting the last actual value of the plurality of actual values.

Correspondingly, an embodiment of the present invention further provides an apparatus for calibrating a dust sensor, the apparatus comprising: receiving means for receiving an actual value of a dust concentration at a current location; and calibrating means for determining the actual value according to the actual value The output value of the dust sensor is calibrated.

Optionally, the device further includes: a reading device, configured to read a current output value of the dust sensor; the calibration device is further configured to: calculate a calibration coefficient according to the actual value and the current output value; And using the calibration factor to calibrate the output value of the dust sensor.

Optionally, the receiving device is further configured to sequentially receive, according to a plurality of different times, a plurality of actual values of the dust concentration corresponding to the plurality of different times at the current location; the device further includes: a reading device, configured to: And reading, according to the plurality of different times, a plurality of output values of the dust sensor corresponding to the plurality of different times; the calibration device is further configured to: according to the plurality of actual values and the plurality of output values To calibrate the output value of the dust sensor.

Optionally, the calibration device fits the plurality of actual values and the plurality of output values to calibrate an output value of the dust sensor.

Correspondingly, the embodiment of the invention further provides a dust sensor, which comprises the above device.

Correspondingly, the embodiment of the present invention further provides a terminal, where the terminal includes: a first acquiring device, configured to acquire a current geographic location; and a second acquiring device, configured to acquire a current from a meteorological monitoring point closest to the current geographic location. The actual value of the dust concentration at the location; and a transmitting device for transmitting the actual value.

Optionally, the second acquiring device is further configured to acquire, according to the specified multiple different times, a plurality of actual values of the dust concentration corresponding to the plurality of different times from the meteorological monitoring point; and the transmitting device Also for sequentially transmitting each of the plurality of actual values for the plurality of different times.

Optionally, the sending device is further configured to send a calibration instruction after transmitting the last actual value of the plurality of actual values.

Through the above technical solution, the actual value of the dust concentration at the current position is received, and the output value of the dust concentration is calibrated by the actual value so that the output value of the dust sensor is substantially consistent with the actual dust concentration value, and the calibration of the dust sensor is further improved. Simple, convenient and user-friendly, it greatly improves the reliability and service life of the dust concentration sensor.

Other features and advantages of embodiments of the invention will be described in detail in the Detailed Description.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the invention. In the drawing:

Figure 1 is a flow chart showing the calibration of a dust sensor in an embodiment;

2 is a flow chart showing the calibration of a dust sensor using an actual dust concentration value in an embodiment;

Figure 3 is a block diagram showing the structure of an apparatus for calibrating a dust sensor in an embodiment;

4 is a flow chart showing a method for calibrating a dust concentration of a terminal;

Fig. 5 is a block diagram showing the structure of a terminal in an embodiment.

Description of the reference numerals

11 receiving device 12 calibration device

21 first acquisition device 22 second acquisition device

23 sending device

detailed description

The specific embodiments of the embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the embodiments of the invention.

Figure 1 shows a flow diagram for calibrating a dust sensor in one embodiment. As shown in FIG. 1, an embodiment of the present invention provides a method for calibrating a dust sensor, the method being directed to an apparatus for calibrating a dust sensor, the method may include the following steps:

Step S110, receiving an actual value of the dust concentration at the current position.

Alternatively, the actual value of the dust concentration may be received only once, or the actual value of the corresponding multiple dust concentration may be received at different times. For example, the first actual value M1 can be received at time T1, the second actual value M2 is received at time T2, ... the actual value Mn is received at time Tn. Here, the size of n and the time interval between different times may be set by the user or by default by the system depending on the specific situation.

The actual value may be received from the terminal, and optionally, the terminal may be received after the reception succeeds or the reception fails. Signal feedback for work or failure. The specific acquisition method of the terminal for the actual value will be described in detail later.

Optionally, data communication between the terminal and the device for calibrating the dust sensor can be performed through a wireless network, such as data communication via WIFI, Bluetooth, or the like.

Step S120, calibrating the output value of the dust sensor according to the actual value to keep the output value of the dust sensor consistent with the actual dust concentration value.

In an alternative embodiment, the terminal may send a calibration command while transmitting the actual value of the dust concentration to the device for calibrating the dust sensor, or send a calibration command first, and then send the current position to the device for calibrating the dust sensor. The actual value of the dust concentration at the current time. Alternatively, for different types of dust, different calibration commands can be sent, for example, to calibrate the PM2.5 concentration value output by the dust sensor, then send a calibration command for PM2.5, and calibrate the concentration value of PM10 output by the dust sensor. , then send a calibration instruction about PM10. At the same time, the terminal can send the actual value of the corresponding different types of dust concentration.

Fig. 2 is a flow chart showing the calibration of the dust sensor using the actual value of the dust concentration in an embodiment. As shown in FIG. 2, step S120 may further include the following steps:

In step S121, the current output value M of the dust sensor is read while receiving the actual value M0 of the dust concentration at the current position. Here, for the different calibration commands received, the current output value of the corresponding different types of dust concentration can be read from the dust sensor, for example, if a calibration command for PM2.5 is received, the PM2 is read from the dust sensor. The current output value of 5, if receiving a calibration command for PM10, reads the current output value of PM10 from the dust sensor.

In step S121, the calibration coefficient K is calculated according to the actual value M0 of the received dust concentration and the current output value M of the read dust sensor. Alternatively, the value of the calibration coefficient K may be a ratio of the actual value M0 of the received dust concentration to the current output value M of the read dust sensor, ie K=M0/M.

In step S123, the calibration coefficient K is used to calibrate the output value of the dust sensor. Optionally, a calibration coefficient K may be pre-stored in the storage space, and an output value of the dust sensor is displayed as K*M, where the initial value of K may be set to 1, and in the case of K=1, the display of the dust sensor The value is the measured value, and after the value of the dust sensor is recalculated and updated in step S122, the display value K*M of the dust sensor is the value after calibration.

In another optional embodiment, the terminal may send the actual value of the dust concentration at the current time and the current time to the device for calibrating the dust sensor at a plurality of different times, and the device for calibrating the dust sensor may be based on the plurality of The actual value calibrates the dust sensor.

Specifically, each time the actual value of the dust concentration at the current position and the current time is received, the corresponding output value of the dust sensor at this moment is sequentially read, for example, when the first actual value M1 of the dust concentration is received at the time T1. Read the current output value N1 of the dust sensor and store (M1, N1) at the same time. When receiving the second actual value M2 of the dust concentration at time T2, read the current output value N1 of the dust sensor, and simultaneously (M2, N2) Storage, ... When the nth actual value Mn of the dust concentration is received at the time Tn, the current output value N1 of the dust sensor is read, and (Mn, Nn) is simultaneously stored. After receiving the nth actual value Mn of the dust concentration, the calibration command sent by the terminal can be received, and then the two sets of data (M1, M2, ... Mn) and (N1, N2, ... Nn) can be passed. To calibrate the output value of the dust sensor.

Alternatively, two sets of data (M1, M2, ... Mn) and (N1, N2, ... Nn) can be fitted to calibrate the output value of the dust sensor. For example, the two sets of data can be linearly fitted, and the fitting function can be Ny=a*Nx+b, where a and b are fitting coefficients, and the values of a and b can be fitted by the above two sets of data. Nx is the measured value of the dust sensor, and Ny is the output value of the calibrated dust sensor. Alternatively, n may be an integer greater than or equal to 1. In the case of n=1, the value of b may be set to 0, and a may be calculated in the same manner as the calibration coefficient K above.

Optionally, in the initial setting, the output value of the dust sensor Ny=a*Nx+b may be set, the initial value of a is set to 1, and the initial value of b is set to 0, then the output of the dust sensor is in the initial process. The value is the measured value, and after the above fitting process calculates and updates the values of a and b, the output value of the dust sensor is the calibrated value.

Further, optionally, the above calibration process may be set to be performed repeatedly, for example, every day or every two days to automatically complete calibration of the dust sensor output value.

Optionally, the calculation process of the above calibration coefficient K and the values of the simulation coefficients a and b may also be performed in the terminal, and after the terminal calculation is completed, it is sent to the device for calibrating the dust sensor, and the pre-stored quasi-coefficient K is updated by the device. Or simulate the values of coefficients a and b to complete the calibration of the dust sensor output value.

Figure 3 is a block diagram showing the structure of an apparatus for calibrating a dust sensor in an embodiment. As shown in FIG. 3, the present invention further provides an apparatus for calibrating a dust sensor, the apparatus may include: receiving means 11 for receiving an actual value of a dust concentration at a current location, the actual value being receivable from the terminal, Data communication between the terminal and the device for calibrating the dust sensor can be performed via a wireless network, such as data communication via WIFI, Bluetooth, etc.; and a calibration device 12 for outputting the dust sensor based on the actual value Calibrate to ensure the accuracy of the dust sensor output value.

Alternatively, the device for calibrating the dust sensor can be integrated with the dust sensor or it can be independent of the dust sensor.

Here, the specific working principle and benefits of the apparatus for calibrating the dust sensor are similar to the specific implementation processes and benefits of the above-described method for calibrating the dust sensor for the apparatus for calibrating the dust sensor, and will not be described herein.

Accordingly, the present invention also provides a dust sensor, which may include the above-described apparatus for calibrating a dust sensor. The dust sensor can be applied to air conditioners, air purifiers, air boxes and the like. The actual value of the dust concentration sent by the terminal can also be received by the upper device of the dust sensor or the dust sensor (such as an air conditioner, an air cleaner, an air box, etc.) and then sent to the device for calibrating the dust sensor.

Figure 4 shows a flow diagram of a method for calibrating dust concentrations of a terminal. As shown in FIG. 4, an embodiment of the present invention further provides a method for calibrating a dust concentration, which is performed based on a terminal, such as a mobile phone, a tablet computer, a netbook, etc., and the method may include the following steps. :

Step S210: Acquire a current geographic location, where the geographic location can be obtained through the GPS function of the terminal.

Here, before obtaining the current geographic location, the user's calibration command may be first received, which may include the type of dust to be calibrated, which may include various types of dust such as PM2.5, PM10, and the like. The acquisition of the current address location begins after receiving the user's calibration command.

In addition, after receiving the user's calibration command, the user may be prompted to ensure that the indoor and outdoor air is circulated when the calibration is performed, and no smoke is generated or is about to be generated indoors.

Step S220: Obtain an actual value of the dust concentration at the current location. Optionally, the actual value of the dust concentration corresponding to the type of dust included in the user instruction may be obtained from a weather monitoring point closest to the determined current geographic location. .

Step S230, transmitting the actual value of the dust concentration at the acquired current position.

Specifically, the number of acquisitions of the actual value of the dust concentration and the number of transmissions are also different depending on the calibration method used for the selection.

Alternatively, in a calibration method, the actual value of the dust concentration can be sent only once to the device for calibrating the dust concentration, and after the actual value of the dust concentration is sent, the calibration is sent to the device for calibrating the dust concentration. Command to further calibrate the dust sensor by the equipment used to calibrate the dust concentration.

In another calibration mode, the user may be prompted to select one or more times (eg, one or more times such as T1, T2, ... TN) as a calibration record point, optionally after the user selects, First, it is judged whether the time selected by the user meets the condition, including whether the time interval selected by the user is too long or too short, and the user is prompted to perform reselection if the condition is not met.

If the time selected by the user meets the condition, at each corresponding time point, the actual value of the dust concentration at the current geographical position is obtained, and the actual value is sent to the device for calibrating the dust concentration, for example, At the time T1, the first actual value M1 of the dust concentration of the current position is obtained from the dust concentration monitoring point, and the first actual value M1 is sent to the device for calibrating the dust concentration, and the dust concentration monitoring point is obtained at the T2 time. a second actual value M2 of the dust concentration at the current position, and the second actual value M2 is sent to the device for calibrating the dust concentration, ... at a time Tn, obtaining the dust concentration of the current position from the dust concentration monitoring point The nth actual value Mn and the nth actual value Mn are sent to the device for calibrating the dust concentration. Here, n may be an integer greater than or equal to 1.

After the nth actual value Mn is sent, a calibration command can be sent to the device for calibrating the dust concentration, and then the dust sensor is further calibrated by the device for calibrating the dust concentration.

Fig. 5 is a block diagram showing the structure of a terminal in an embodiment. As shown in FIG. 5, an embodiment of the present invention further provides a terminal. The terminal may be, for example, a mobile phone, a tablet computer, a netbook, etc., and the terminal may include: a first acquiring device 21 for acquiring a current geographic location; and a second obtaining device 22 for obtaining a weather closest to the current geographic location. The monitoring point acquires an actual value of the dust concentration at the current location; and a transmitting device 23 for transmitting the actual value.

The specific working principle and benefits of the terminal provided by the embodiment of the present invention are similar to the above-mentioned terminal-based method and benefit for calibrating the dust concentration, and will not be further described herein.

The embodiment of the invention calibrates the output value of the dust sensor by using the actual value of the dust concentration at the current position, so that the dust sensor can be installed in different household appliances or in different use environments, and has good applicability, and at the same time avoids Dust sensors are not conducive to calibration defects due to large deviations in long-term operation.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the foregoing embodiments. The technical solution carries out a variety of simple variants, all of which fall within the scope of protection of embodiments of the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of the embodiments of the present invention are not separately described.

Those skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by a program instructing related hardware, and the program is stored in a storage medium, and includes a plurality of instructions to make one (may be a single chip microcomputer, A chip or the like or a processor performs all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

In addition, the various embodiments of the present invention may be combined in any combination, as long as they do not deviate from the idea of the embodiments of the present invention, and should also be regarded as the disclosure of the embodiments of the present invention.

Claims

A method for calibrating a dust sensor, the method comprising:

Receiving the actual value of the dust concentration at the current location;

The output value of the dust sensor is calibrated based on the actual value.
The method of claim 1 wherein said calibrating the output value of said dust sensor based on said actual value comprises:

Reading the current output value of the dust sensor;

Calculating a calibration coefficient based on the actual value and the current output value;

The calibration coefficient is used to calibrate the output value of the dust sensor.
The method according to claim 1 or 2, wherein the method further comprises:

Receiving, for a plurality of different times, a plurality of actual values of the dust concentration corresponding to the plurality of different times at the current position;

Reading, for the plurality of different times, a plurality of output values of the dust sensor corresponding to the plurality of different times; and

The output value of the dust sensor is calibrated based on the plurality of actual values and the plurality of output values.
The method of claim 3 wherein the plurality of actual values and the plurality of output values are fitted to calibrate an output value of the dust sensor.
A method for calibrating a dust sensor, the method comprising:

Get the current location;

Obtaining the actual value of the dust concentration at the current location from the weather monitoring point closest to the current geographic location;

Send the actual value.
The method of claim 5, wherein the method further comprises:

Obtaining, from the meteorological monitoring point, a plurality of actual values of the dust concentration corresponding to the plurality of different times for the specified plurality of different times;

Each of the plurality of actual values is transmitted in sequence for the plurality of different times.
The method of claim 6 wherein the method further comprises:

A calibration instruction is sent after transmitting the last actual value of the plurality of actual values.
An apparatus for calibrating a dust sensor, the apparatus comprising:

a receiving device for receiving an actual value of the dust concentration at the current location;

And a calibration device for calibrating the output value of the dust sensor according to the actual value.
The device according to claim 8, wherein the device further comprises: reading means for reading a current output value of the dust sensor;

The calibration device is also used to:

Calculating a calibration coefficient based on the actual value and the current output value;

The calibration coefficient is used to calibrate the output value of the dust sensor.
Device according to claim 8 or 9, characterized in that

The receiving device is further configured to sequentially receive, according to a plurality of different times, a plurality of actual values of dust concentrations corresponding to the plurality of different times at the current location;

The device further includes: a reading device, configured to sequentially read, according to the plurality of different times, a plurality of output values of the dust sensor corresponding to the plurality of different times;

The calibration device is further configured to calibrate an output value of the dust sensor based on the plurality of actual values and the plurality of output values.
The apparatus of claim 10 wherein said calibration means fits said plurality of actual values and said plurality of output values to calibrate an output value of said dust sensor.
A dust sensor, characterized in that the dust sensor comprises the device according to any of claims 8-11.
A terminal, the terminal comprising:

a first obtaining device, configured to acquire a current geographic location;

a second obtaining means, configured to acquire an actual value of the dust concentration at the current location from a weather monitoring point closest to the current geographic location;

And a sending device, configured to send the actual value.
The terminal of claim 13 wherein:

The second obtaining device is further configured to sequentially acquire, from the meteorological monitoring point, a plurality of actual values of the dust concentration corresponding to the plurality of different times for the specified plurality of different times;

The transmitting device is further configured to sequentially send each of the plurality of actual values for the plurality of different times.
The terminal according to claim 14, wherein said transmitting means is further configured to send a calibration instruction after transmitting the last one of said plurality of actual values.