CN110044785B - Method and device for detecting particulate matters and vehicle - Google Patents
Method and device for detecting particulate matters and vehicle Download PDFInfo
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- CN110044785B CN110044785B CN201910305878.9A CN201910305878A CN110044785B CN 110044785 B CN110044785 B CN 110044785B CN 201910305878 A CN201910305878 A CN 201910305878A CN 110044785 B CN110044785 B CN 110044785B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 222
- 239000002245 particle Substances 0.000 claims abstract description 40
- 239000013618 particulate matter Substances 0.000 claims description 81
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003897 fog Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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Abstract
The disclosure relates to a method, a device and a vehicle for detecting particulate matters, wherein the method comprises the steps of obtaining vehicle state information; determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode; and detecting the target particles in the vehicle in the target detection mode to obtain a first particle parameter. In this way, by determining the target detection method from the preset detection methods based on the vehicle state information, the service life of the detection device can be prolonged while the accuracy of the detection result is improved.
Description
Technical Field
The disclosure relates to the technical field of vehicles, in particular to a method and a device for detecting particulate matters and a vehicle.
Background
In recent years, urban environmental pollution is becoming serious, haze weather frequently appears, the content of PM2.5(Particulate Matter) in air gradually attracts attention, and thus the content of PM2.5 in air in a vehicle begins to become one of hot targets of people. The existing PM2.5 detection device suitable for being arranged in the vehicle is generally in an infrared detection mode or a laser detection mode, and the infrared detection mode generally has larger deviation of detection results and lower accuracy, so that accurate detection results cannot be obtained; in the laser detection mode, because the service life of the laser diode is short (generally about 10000 hours in normal use), the sensor needs to be replaced every 1-2 years under the condition that the laser diode is always kept in an on state in normal use, and in addition, the extra loss of the laser diode can be caused under the environment with higher temperature, so that various environments are integrated, and when the laser detection mode is adopted to detect PM2.5, PM2.5 detection equipment needs to be replaced every less than one year basically.
Disclosure of Invention
The invention aims to provide a method, a device and a vehicle for detecting particulate matters, which are used for solving the technical problems of low accuracy and short service life of the existing PM2.5 detection equipment.
To achieve the above object, a first aspect of the present disclosure provides a method of detecting particulate matter, the method including:
acquiring vehicle state information;
determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode;
and detecting the target particles in the vehicle in the target detection mode to obtain a first particle parameter.
Optionally, the vehicle state information includes an ignition lock state of the vehicle; the determining a target detection mode from preset detection modes according to the vehicle state information includes:
when the ignition lock state of the vehicle is converted from a closed state to an open state, acquiring the opening duration;
when the starting time length is less than or equal to a preset time length threshold value, taking the laser detection mode as the target detection mode;
and when the starting time length is greater than the preset time length threshold value, taking the infrared detection mode as the target detection mode.
Optionally, when the on duration is greater than the preset duration threshold, the method further includes:
and periodically detecting the target particles in a laser detection mode to obtain a second particle parameter.
After the detecting the first target particulate matter inside the vehicle by the target detection manner, the method further includes:
the first particulate parameter is corrected by the second particulate parameter.
Optionally, after obtaining the first particulate matter parameter, the method further comprises:
acquiring a plurality of historical particulate parameters detected in a historical time period;
calculating the difference value of the historical particle parameters at every two adjacent moments;
when the difference values of the continuous preset number are all smaller than a preset difference value threshold value, acquiring the temperature inside the vehicle;
when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode to the infrared detection mode;
and when any difference value is larger than or equal to the preset difference value threshold value, switching the current detection mode to the laser detection mode.
In a second aspect of the present disclosure, there is provided an apparatus for detecting particulate matter, the apparatus comprising:
the first acquisition module is used for acquiring vehicle state information;
the first determining module is used for determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode;
and the detection module is used for detecting the target particles in the vehicle in the target detection mode to obtain a first particle parameter.
Optionally, the vehicle state information includes an ignition lock state of the vehicle; the first determining module includes:
the acquisition submodule is used for acquiring the starting time when the ignition lock state of the vehicle is converted from the closing state to the opening state;
the determining submodule is used for taking the laser detection mode as the target detection mode when the starting time length is less than or equal to a preset time length threshold;
the determining submodule is further configured to use the infrared detection mode as the target detection mode when the starting duration is greater than the preset duration threshold.
Optionally, the first determining module further includes:
the detection submodule is used for periodically detecting the target particulate matters in a laser detection mode to obtain second particulate matter parameters;
the device further comprises:
and the correction module is used for correcting the first particulate matter parameter through the second particulate matter parameter.
Optionally, the apparatus further comprises:
the second acquisition module is used for acquiring a plurality of historical particulate matter parameters detected in a historical time period;
the calculation module is used for calculating the difference value of the historical particulate matter parameters at every two adjacent moments;
the second determining module is used for acquiring the temperature inside the vehicle when the difference values of the continuous preset number are all smaller than a preset difference value threshold value; when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode to the infrared detection mode;
the second determining module is further configured to switch the current detection mode to the laser detection mode when any of the difference values is greater than or equal to the preset difference value threshold.
In a third aspect of the present disclosure, there is provided a vehicle including the apparatus for detecting particulate matter described in the above second aspect.
According to the technical scheme, vehicle state information is acquired; determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode; and detecting the target particles in the vehicle in the target detection mode to obtain a first particle parameter. In this way, by determining the target detection mode from the preset detection modes according to the vehicle state information, the accuracy of the detection device can be improved, and the service life of the detection device can be prolonged.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart of a method of detecting particulate matter provided by an exemplary embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a method of detecting particulate matter according to the embodiment shown in FIG. 1;
FIG. 3 is a flow chart of another method of detecting particulate matter provided by an exemplary embodiment of the present disclosure;
FIG. 4 is a block diagram of an apparatus for detecting particulate matter provided in another exemplary embodiment of the present disclosure;
FIG. 5 is a block diagram of an apparatus for detecting particulate matter according to the embodiment shown in FIG. 4;
FIG. 6 is a block diagram of another apparatus for detecting particulate matter provided in another exemplary embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a flow chart of a method of detecting particulate matter provided by an exemplary embodiment of the present disclosure; referring to fig. 1, a method of detecting particulate matter, the method comprising:
Wherein the vehicle state information is traveling state information or environmental state information of the vehicle.
For example, the vehicle state information may be a starting state of the vehicle, an unlock state of an ignition lock, a running speed state; or the state information of the environment where the vehicle is located, such as temperature, humidity, pH value or illumination intensity, etc.
And 102, determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode.
The infrared detection mode is that the gas to be detected in a preset cavity is irradiated by an infrared light source, so that a projection image of particulate matters in the gas to be detected in the preset cavity is obtained through an imaging mechanism, and the quantity or the concentration of the particulate matters in the gas to be detected is determined according to the projection image; the laser detection mode is to irradiate the gas to be detected in the preset cavity through a laser light source, obtain a projection image of particles in the gas to be detected in the preset cavity through an imaging mechanism, and determine the number or the concentration of the particles in the gas to be detected according to the projection image.
Exemplarily, an infrared light source, a laser light source, an air suction fan, a gas storage cavity and an imaging mechanism are simultaneously arranged in one PM2.5 sensor, an air inlet valve and an air outlet valve are arranged on the gas storage cavity, the air inlet valve is opened to suck air to be detected into the gas storage cavity through the air suction fan, the air outlet valve is closed, a target detection mode is determined from preset detection modes according to the vehicle state information, when the target detection mode is the infrared detection mode, the infrared light source is opened, the air in the gas storage cavity is irradiated through the infrared light source, so that a projection image of particulate matters in the air in the gas storage cavity is obtained through the imaging mechanism, and the concentration of the particulate matters in the air is determined according to the projection image; when the target detection mode is a laser detection mode, a laser light source is turned on, the air in the air storage cavity is irradiated through the laser light source, a projection image of particulate matters in the air storage cavity is acquired through an imaging mechanism, and the concentration of the particulate matters in the air is determined according to the projection image. In the infrared detection mode and the laser detection mode, the air storage cavity, the air suction fan and the imaging mechanism are all shared in two detection modes, and the laser light source can be a laser diode or a laser.
The target particulate matter may be PM2.5 fine particulate matter or inhalable particulate matter PM10, smoke, dust, fog or the like; the first particle parameter is the number of the target particles in the preset cavity detected by the infrared detection mode or the laser detection mode, and the concentration of the target particles in the gas to be detected can also be obtained according to the number of the target particles in the preset cavity.
According to the technical scheme, the vehicle state information is acquired; determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode; and detecting the target particles in the vehicle in the target detection mode to obtain a first particle parameter. In this way, by determining the target detection method from the preset detection methods based on the vehicle state information, the service life of the detection device can be prolonged while the accuracy of the detection result is improved.
FIG. 2 is a flow chart illustrating a method of detecting particulate matter according to the embodiment shown in FIG. 1; referring to fig. 2, the vehicle state information includes an ignition lock state of the vehicle; the step of determining the target detection manner from the preset detection manners according to the vehicle state information, which is described in the step 102, may include the steps of:
Exemplarily, the ignition LOCK gear of the vehicle includes a LOCK gear, an ACC gear, an ON gear, and a START gear; the LOCK gear is a locking gear, and the LOCK gear is a position for inserting and pulling out a key, at the moment, except for an anti-theft system of the vehicle, other circuits are completely closed, and a steering wheel of the vehicle is locked; the ACC gear is an accessory power-on gear, when a key is screwed to the position, an accessory power utilization circuit is connected, and equipment such as a radio, an air conditioner and the like can be used; the ON gear is a switch-ON gear, when a key is screwed to the position, a whole vehicle circuit is switched ON, a system can do necessary preparation work and self-checking work for starting an engine, and the key can be kept at the position when the vehicle normally runs; this START shelves are the starting gear, when screwing the key to this position, starter motor circuit switch-ON can drive the engine operation and START, loosens the back key and can get back to ON shelves automatically, and the key is in the ON state during normal driving, and at this moment all circuits of whole car are in operating condition. The off state may be that the vehicle ignition LOCK is in LOCK gear in the present embodiment, and the ON state may be that the vehicle ignition LOCK is in ACC gear or ON gear; the switching of the ignition LOCK from the closed state to the open state can be that the ignition LOCK of the vehicle is switched from the LOCK gear to the ACC gear under the action of a vehicle key; the state of the shift from the LOCK gear to the ON gear is also possible. The obtaining of the opening time length may be that when the ignition LOCK of the vehicle is turned from the LOCK gear to the ACC gear, a timing device is started to start timing, and the time length for opening the vehicle is determined by the timing device.
And 1022, when the starting duration is less than or equal to a preset duration threshold, taking the laser detection mode as the target detection mode.
For example, since the laser detection method has the advantages of small deviation of the detection result and high precision, when the opening duration is less than or equal to the preset duration threshold, it indicates that the vehicle has not entered the stable state, and at this time, an accurate initial detection result needs to be obtained through the laser detection method.
And 1023, when the starting time length is greater than the preset time length threshold value, taking the infrared detection mode as the target detection mode.
For example, since the laser light source required in the laser detection method has a short life (generally about 10000 hours), and the infrared light source generally has a life more than four times that of the laser light source, after an accurate initial detection result is obtained through the laser detection method, the target detection method can be switched to the infrared detection method, so as to improve the accuracy of the detection result and ensure the service life of the whole detection device.
Further, when the on-time is greater than the preset time threshold in the step 1023, the method further includes:
and 10230, periodically detecting the target particles in a laser detection mode to obtain second particle parameters.
Exemplarily, the second particle parameter is the number or the concentration of the target particles in the preset cavity detected by a laser detection method; when the starting time length is greater than the preset time length threshold value, the infrared detection mode is used as the target detection mode, then the infrared detection mode is obtained as the time length of the target detection mode, when the time length is equal to a first target time threshold value, the laser detection mode is used as the target detection mode, the second particle parameter is obtained, timing is restarted, when the time length of the laser detection mode used as the target detection mode is equal to a second target time threshold value, the infrared detection mode is used as the target detection mode, at the moment, timing is restarted again, and the steps from obtaining the time length of the infrared detection mode used as the target detection mode to using the infrared detection mode as the target detection mode are continuously executed.
After the step of detecting the first target particulate matter inside the vehicle through the target detection manner in step 103, the method further includes:
and 104, correcting the first particulate matter parameter through the second particulate matter parameter.
For example, the second particulate matter parameter value may be used as the first particulate matter parameter, or the first particulate matter parameter may be corrected according to the second particulate matter parameter by a preset algorithm, where the preset algorithm may obtain an average value of the first particulate matter parameter and the second particulate matter parameter, and use the average value as the corrected first particulate matter parameter; the preset algorithm may also be to obtain a difference between the first particulate matter parameter and the second particulate matter parameter, and add or subtract half of the difference to the first particulate matter parameter to obtain a corrected first particulate matter parameter.
FIG. 3 is a flow chart of another method of detecting particulate matter provided by an exemplary embodiment of the present disclosure; referring to FIG. 3, after obtaining the first particulate parameter as set forth in step 103, or after modifying the first particulate parameter as set forth in step 104, the method can further include the steps of:
Illustratively, the historical time period is a period from the current time to a time that is delayed to the historical direction by a preset time, for example, the concentration of the target particulate matter detected in 10 minutes is obtained, and if the sampling period is 2 times per minute, 20 particulate matter concentrations exist in 10 minutes.
And 106, calculating the difference value of the historical particle parameters at every two adjacent moments.
Illustratively, the difference between two particulate matter concentrations at adjacent times among 20 particulate matter concentrations in 10 minutes is obtained. For example, a difference between the concentration of the particulate matter collected for the first time and the concentration of the particulate matter collected for the second time is obtained; and obtaining the difference value between the concentration of the particulate matters collected for the second time and the concentration of the particulate matters collected for the third time until the difference value between the concentration of the particulate matters collected for the ninth time and the concentration of the particulate matters collected for the tenth time is obtained.
And 107, acquiring the temperature inside the vehicle when the difference values of the continuous preset number are all smaller than a preset difference value threshold value.
Illustratively, the magnitude relation between each difference value and the preset difference value threshold is respectively determined, when a plurality of continuous difference values are smaller than the preset difference value threshold, it indicates that the data change of the in-vehicle PM2.5 is not large, the detection result is relatively stable, at this time, the temperature condition inside the vehicle needs to be acquired, and the target detection mode is determined according to the temperature condition inside the vehicle.
For example, when the temperature is too high, the loss of the laser light source in the laser detection device can be increased, which is not beneficial to prolonging the service life of the detection device, and the influence of the temperature on the infrared light source in the infrared detection mode is not great, so that when the temperature in the vehicle is higher, the infrared detection mode is adopted, which can avoid the greater loss of the laser light source, and is beneficial to improving the service life of the detection device.
And step 108, when any difference value is greater than or equal to the preset difference value threshold value, switching the current detection mode to the laser detection mode.
For example, when one of the difference values is greater than or equal to the preset difference threshold, it indicates that the current detection result of PM2.5 is unstable, and a more accurate detection result needs to be obtained by a laser detection method to ensure the accuracy of the detection result.
According to the technical scheme, on one hand, the target particulate matter is periodically detected in a laser detection mode to obtain a second particulate matter parameter; correcting the first particle parameters through the second particle parameters; on the other hand, after the first particulate matter parameter is obtained, a plurality of historical particulate matter parameters detected in a historical time period are obtained; calculating the difference value of the historical particle parameters at every two adjacent moments; when the difference values of the continuous preset number are smaller than a preset difference value threshold value, acquiring the temperature inside the vehicle; when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode into the infrared detection mode; and when any difference value is greater than or equal to the preset difference value threshold value, switching the current detection mode to the laser detection mode. Like this, revise this first particulate matter parameter and when this temperature is greater than or equal to and predetermines the temperature threshold value through this second particulate matter parameter, switch the current detection mode into this infrared detection mode, can be when improving the accuracy of testing result, extension detection device's life.
FIG. 4 is a block diagram of an apparatus for detecting particulate matter provided in another exemplary embodiment of the present disclosure; referring to fig. 4, an apparatus 400 for detecting particulate matter, the apparatus 400 comprising:
a first obtaining module 401, configured to obtain vehicle state information;
a first determining module 402, configured to determine a target detection manner from preset detection manners according to the vehicle state information, where the target detection manner includes an infrared detection manner and/or a laser detection manner;
the detecting module 403 is configured to detect a target particulate matter inside the vehicle in the target detection manner, so as to obtain a first particulate matter parameter.
According to the technical scheme, the vehicle state information is obtained through the first obtaining module; determining a target detection mode from preset detection modes according to the vehicle state information through a first determination module, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode; the target particles in the vehicle are detected through the detection module in the target detection mode, and first particle parameters are obtained. In this way, by determining the target detection method from the preset detection methods based on the vehicle state information, the service life of the detection device can be prolonged while the accuracy of the detection result is improved.
FIG. 5 is a block diagram of an apparatus for detecting particulate matter according to the embodiment shown in FIG. 4; referring to fig. 5, the vehicle state information includes an ignition lock state of the vehicle; the first determining module 402 includes:
the obtaining submodule 4021 is configured to obtain an opening duration when the ignition lock state of the vehicle is changed from the off state to the on state;
the determining submodule 4022 is configured to take the laser detection mode as the target detection mode when the start duration is less than or equal to a preset duration threshold;
the determining submodule 4022 is further configured to take the infrared detection mode as the target detection mode when the starting duration is greater than the preset duration threshold.
Further, the first determining module 402 further includes:
and the detection submodule 4023 is used for periodically detecting the target particulate matter in a laser detection mode to obtain a second particulate matter parameter.
The apparatus 400 further comprises:
a correction module 404 corrects the first particulate matter parameter by the second particulate matter parameter.
FIG. 6 is a block diagram of another apparatus for detecting particulate matter provided in another exemplary embodiment of the present disclosure; referring to fig. 6, the apparatus 400 further comprises:
a second obtaining module 405, configured to obtain a plurality of historical particulate parameters detected in a historical time period;
a calculating module 406, configured to calculate a difference between the historical particulate matter parameters at each two adjacent moments;
a second determining module 407, configured to obtain the temperature inside the vehicle when a preset number of the differences are all smaller than a preset difference threshold; when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode into the infrared detection mode;
the second determining module 407 is further configured to switch the current detection mode to the laser detection mode when any one of the difference values is greater than or equal to the preset difference value threshold.
In yet another exemplary embodiment of the present disclosure, a vehicle is provided that includes the apparatus 400 for detecting particulate matter described above with reference to any one of fig. 4 to 6.
According to the technical scheme, on one hand, the target particulate matter is periodically detected through the detection submodule in a laser detection mode to obtain a second particulate matter parameter; correcting the first particulate matter parameter through the second particulate matter parameter through a correction module; on the other hand, after the first particulate matter parameter is obtained through the second obtaining module, a plurality of historical particulate matter parameters detected in a historical time period are obtained; calculating the difference value of the historical particle parameters at every two adjacent moments through a calculation module; when the difference values of the continuous preset number are smaller than a preset difference value threshold value, the temperature in the vehicle is obtained through a second determining module; when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode into the infrared detection mode; and when any difference value is greater than or equal to the preset difference value threshold value, switching the current detection mode to the laser detection mode. Like this, revise this first particulate matter parameter and when this temperature is greater than or equal to and predetermines the temperature threshold value through this second particulate matter parameter, switch the current detection mode into this infrared detection mode, can be when improving the accuracy of testing result, extension detection device's life.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (5)
1. A method of detecting particulate matter, the method comprising:
acquiring vehicle state information;
determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode;
detecting target particles in the vehicle in the target detection mode to obtain a first particle parameter;
the vehicle state information includes an ignition lock state of the vehicle; the determining a target detection mode from preset detection modes according to the vehicle state information includes:
when the ignition lock state of the vehicle is converted from a closed state to an open state, acquiring the opening duration;
when the starting time length is less than or equal to a preset time length threshold value, taking the laser detection mode as the target detection mode;
when the starting time length is larger than the preset time length threshold value, taking the infrared detection mode as the target detection mode;
when the starting duration is greater than the preset duration threshold, the method further comprises the following steps:
periodically detecting the target particles in a laser detection mode to obtain second particle parameters;
after the target particulate matter inside the vehicle is detected by the target detection means, the method further includes:
the first particulate parameter is corrected by the second particulate parameter.
2. The method of claim 1, wherein after obtaining the first particulate matter parameter, the method further comprises:
acquiring a plurality of historical particulate parameters detected in a historical time period;
calculating the difference value of the historical particle parameters at every two adjacent moments;
when the difference values of the continuous preset number are all smaller than a preset difference value threshold value, acquiring the temperature inside the vehicle;
when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode to the infrared detection mode;
and when any difference value is larger than or equal to the preset difference value threshold value, switching the current detection mode to the laser detection mode.
3. An apparatus for detecting particulate matter, the apparatus comprising:
the first acquisition module is used for acquiring vehicle state information;
the first determining module is used for determining a target detection mode from preset detection modes according to the vehicle state information, wherein the target detection mode comprises an infrared detection mode and/or a laser detection mode;
the detection module is used for detecting target particles in the vehicle in a target detection mode to obtain a first particle parameter;
the vehicle state information includes an ignition lock state of the vehicle; the first determining module includes:
the acquisition submodule is used for acquiring the starting time when the ignition lock state of the vehicle is converted from the closing state to the opening state;
the determining submodule is used for taking the laser detection mode as the target detection mode when the starting time length is less than or equal to a preset time length threshold;
the determining submodule is further configured to use the infrared detection mode as the target detection mode when the starting duration is greater than the preset duration threshold;
wherein the first determining module further comprises: the detection submodule is used for periodically detecting the target particulate matters in a laser detection mode to obtain second particulate matter parameters;
the device further comprises: and the correction module is used for correcting the first particulate matter parameter through the second particulate matter parameter.
4. The apparatus of claim 3, further comprising:
the second acquisition module is used for acquiring a plurality of historical particulate matter parameters detected in a historical time period;
the calculation module is used for calculating the difference value of the historical particulate matter parameters at every two adjacent moments;
the second determining module is used for acquiring the temperature inside the vehicle when the difference values of the continuous preset number are all smaller than a preset difference value threshold value; when the temperature is greater than or equal to a preset temperature threshold value, switching the current detection mode to the infrared detection mode;
the second determining module is further configured to switch the current detection mode to the laser detection mode when any of the difference values is greater than or equal to the preset difference value threshold.
5. A vehicle characterized by comprising the apparatus for detecting particulate matter according to claim 3 or 4.
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