CN117664816A - External light path particulate matter sensor and particulate matter detection method - Google Patents
External light path particulate matter sensor and particulate matter detection method Download PDFInfo
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- CN117664816A CN117664816A CN202410147033.2A CN202410147033A CN117664816A CN 117664816 A CN117664816 A CN 117664816A CN 202410147033 A CN202410147033 A CN 202410147033A CN 117664816 A CN117664816 A CN 117664816A
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- 239000013618 particulate matter Substances 0.000 title claims abstract description 66
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 abstract description 33
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005059 dormancy Effects 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The embodiment of the invention provides an external light path particulate matter sensor and a particulate matter detection method, wherein the sensor comprises: the light path module and the circuit module are arranged in the shell; an included angle between the axial direction of the transmitting light hole and the axial direction of the receiving light hole is an acute angle; the light source is arranged below the transmitting light hole, and the light emitting surface of the light source faces the transmitting light hole; the transmitting lens is arranged in the transmitting light hole; the intersection point of the transmitting light hole and the receiving light hole is used as a detection area; the photoelectric receiving tube is arranged below the receiving light hole, and the receiving area of the photoelectric receiving tube faces the receiving light hole; the circuit module comprises a circuit board and electronic components mounted on the circuit board; the circuit board is electrically connected with the light source and the photoelectric receiving tube. The invention can detect the concentration of the particles under the combined action of the light path module and the circuit module, reduce the outline dimension of the particle sensor, reduce the manufacturing cost and improve the service life and the reliability of the particle sensor.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to an external light path particulate matter sensor and a particulate matter detection method.
Background
Contamination with particulate matter (PM 10, PM 2.5, etc.) in the air can grow germs and cause various respiratory diseases, affecting the physical health of people at any time. The volume size of the particles is small, the particles are suspended in the air for a long time, and the human body cannot intuitively sense the existence of the particles, the concentration and the pollution degree of the particles. The particle sensor can detect the concentration of particles in the air in real time, and even analyze the distribution condition of the particle sizes of the particles. The pollution and the hazard degree of the current air environment can be estimated according to the detection data output by the particulate matter sensor, and countermeasures are taken. The particle sensor is widely applied to various products such as air purifiers, fresh air systems, air conditioners, intelligent home, vehicle-mounted air purification and air quality detectors.
Particulate matter sensors are based on the principle of light scattering. The built-in light source of the particle sensor emits light beams, the light beams irradiate suspended particles contained in the air to generate scattering, the photoelectric receiver is placed at a specific position in the detection area to collect scattered light, an electric signal changing along with the intensity of the scattered light is obtained, and the microprocessor collects the electric signal intensity of the receiver in real time and calculates the concentration value of the particles. In the prior art, the detection light path of the particulate matter sensor is completely contained inside the particulate matter sensor housing, and external air must enter the particulate matter sensor to perform detection. The light beam emitted by the light source of the particle sensor propagates inside the particle sensor, and is absorbed and dissipated inside the particle sensor after passing through the detection area; therefore, the particulate matter sensor needs to include an air flow driving element such as a fan and a channel through which air flows, and two openings, namely an air inlet and an air outlet, are further required to be provided on the housing of the particulate matter sensor, and external air enters the particulate matter sensor from the air inlet under the driving of the fan and is discharged to the outside of the particulate matter sensor from the air outlet after passing through the detection area.
To sum up, the particulate matter sensor in the prior art has the following disadvantages:
1. the sensor needs to comprise an airflow driving element such as a fan and the like, and the manufacturing cost is high.
2. The outside air must enter the sensor to detect, so that the pollutants entrained in the air are also brought into the sensor, such as large-particle dust, flock, oil gas smoke and the like, and part of the pollutants cannot be brought out of the sensor by the air flow to be deposited in the sensor, and when the pollutants are deposited in a certain amount, serious stray light interference is generated on an optical path and the pollutants block an air passage, so that the function of the sensor is disabled, and the service life of the sensor is shortened.
3. The sensor is provided with an optical path structure and an air path structure in the shell space at the same time, the structure is complex, and the outline dimension of the sensor cannot be reduced.
Disclosure of Invention
The embodiment of the invention provides an external light path particulate matter sensor and a particulate matter detection method, and aims to solve the problem that the existing particulate matter sensor is poor in structural reliability.
In a first aspect, an embodiment of the present invention provides an external light path particulate matter sensor, including: the device comprises a shell, an optical path module and a circuit module, wherein the optical path module and the circuit module are arranged in the shell;
the shell is provided with an emission light hole and a receiving light hole, the emission light hole and the receiving light hole are both designed in an inclined mode, and an included angle between the axial direction of the emission light hole and the axial direction of the receiving light hole is an acute angle;
the light path module comprises a light source, a transmitting lens and a photoelectric receiving tube;
the light source is arranged below the emission light hole, and the light emitting surface of the light source faces the emission light hole; the emission lens is arranged in the emission light hole;
the intersection point of the transmitting light hole and the receiving light hole is used as a detection area of the light path module;
the photoelectric receiving tube is arranged below the receiving light hole, and the receiving area of the photoelectric receiving tube faces the receiving light hole;
the circuit module comprises a circuit board and an electronic component arranged on the circuit board; the circuit board is electrically connected with the light source and the photoelectric receiving tube.
In a second aspect, an embodiment of the present invention provides a method for detecting particulate matter, which is applied to an electronic component in the particulate matter sensor with an external optical path described in the first aspect, where the electronic component includes an operational amplifier, a microprocessor chip, and a connector, and the method includes:
the operational amplifier acquires the electric signal received by the photoelectric receiver and amplifies the electric signal to obtain an amplified electric signal;
sending the amplified electric signal to the microprocessor chip;
the microprocessor chip converts the amplified electric signals to obtain digital signals; and is combined with
Calculating the digital signal according to a preset built-in algorithm to obtain particulate matter concentration data;
and sending the particulate matter concentration data to the connector.
The embodiment of the invention provides an external light path particulate matter sensor and a particulate matter detection method, wherein the sensor comprises the following components: the device comprises a shell, an optical path module and a circuit module, wherein the optical path module and the circuit module are arranged in the shell; the shell is provided with an emission light hole and a receiving light hole, the emission light hole and the receiving light hole are both designed in an inclined mode, and an included angle between the axial direction of the emission light hole and the axial direction of the receiving light hole is an acute angle; the light path module comprises a light source, a transmitting lens and a photoelectric receiving tube; the light source is arranged below the emission light hole, and the light emitting surface of the light source faces the emission light hole; the emission lens is arranged in the emission light hole; the intersection point of the transmitting light hole and the receiving light hole is used as a detection area of the light path module; the photoelectric receiving tube is arranged below the receiving light hole, and the receiving area of the photoelectric receiving tube faces the receiving light hole; the circuit module comprises a circuit board and an electronic component arranged on the circuit board; the circuit board is electrically connected with the light source and the photoelectric receiving tube. According to the invention, the concentration of the particles can be detected under the combined action of the light path module and the circuit module, on one hand, an air path structure, a fan and other air flow driving elements are not needed, the manufacturing cost can be effectively reduced, and the external dimension of the particle sensor is reduced; on the other hand, the air to be detected can be detected without entering the inside of the particulate matter sensor, and the service life and reliability of the particulate matter sensor can be effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an external light path particulate matter sensor according to an embodiment of the present invention;
FIG. 2 is an exploded view of an external light path particulate matter sensor according to an embodiment of the present invention;
FIG. 3 is a partial block diagram of an external light path particulate matter sensor according to an embodiment of the present invention;
fig. 4 is a flow chart of a method for detecting particulate matters according to an embodiment of the present invention.
Wherein, each reference sign is as follows in the figure:
10. a sensor; 11. a housing; 111. transmitting the light holes; 112. receiving a light hole; 113. a light-transmitting cover plate; 114. a connecting groove; 12. a light source; 13. an emission lens; 14. a detection zone; 15. a photoelectric receiving tube; 16. a receiving lens; 171. a lens body; 172. a mounting frame; 21. a circuit board; 22. a connector; 23. an operational amplifier; 24. a microprocessor chip; 25. a voltage conversion chip; 26. and a communication interface chip.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic diagram of an external light path particulate matter sensor according to an embodiment of the present invention; FIG. 2 is an exploded view of an external light path particulate matter sensor according to an embodiment of the present invention; fig. 3 is a partial block diagram of an external light path particulate matter sensor according to an embodiment of the present invention. An embodiment of the present invention provides an external optical path particulate matter sensor 10, including: the device comprises a shell 11, an optical path module and a circuit module, wherein the optical path module and the circuit module are arranged in the shell 11; the shell 11 is provided with an emission light hole 111 and a receiving light hole 112, the emission light hole 111 and the receiving light hole 112 are both in inclined design, and an included angle between the axial direction of the emission light hole 111 and the axial direction of the receiving light hole 112 is an acute angle; the light path module comprises a light source 12, a transmitting lens 13 and a photoelectric receiving tube 15; the light source 12 is disposed below the emission light hole 111, and the light emitting surface of the light source 12 faces the emission light hole 111; the emission lens 13 is disposed in the emission light hole 111; an intersection point of the transmitting light hole 111 and the receiving light hole 112 serves as a detection area 14 of the light path module; the photoelectric receiving tube 15 is arranged below the receiving light hole 112, and the receiving area of the photoelectric receiving tube 15 faces the receiving light hole 112; the circuit module comprises a circuit board 21 and electronic components mounted on the circuit board 21; the circuit boards 21 are electrically connected to the light source 12 and the photoelectric receiving tube 15.
In the present embodiment, the housing 11 may have a square or rectangular structure (the structure of the housing 11 is not limited). The light path module comprises a light source 12, a transmitting lens 13 and a photoelectric receiving tube 15; wherein the light source 12 may be a laser diode or an infrared light source; an intersection point of the transmitting light hole 111 and the receiving light hole 112 serves as a detection area 14 of the light path module; the circuit module comprises a circuit board 21 and electronic components mounted on the circuit board 21; the circuit boards 21 are electrically connected to the light source 12 and the photoelectric receiving tube 15. The light source 12 emits light required for detection, the light is collected by the emission lens 13 disposed in front of the light source 12, the collected light continues to propagate forward, the light reaches the detection area 14 outside the housing 11, particles are contained in the air in the detection area 14, the light irradiated onto the particles is changed in propagation direction to form scattered light, a part of the scattered light propagates along the direction of the photoelectric receiving tube 15, passes through the receiving light hole 112 and irradiates onto the receiving surface of the photoelectric receiving tube 15, the scattered light is converted into an electrical signal with a corresponding intensity by the photoelectric receiving tube 15 (wherein the electrical signal is in proportion to the concentration of the particles), and the electrical signal is transmitted to the circuit module, and the circuit module converts the electrical signal into the concentration of the particles. Specifically, by adjusting the installation direction of the light source 12 and the photoelectric receiving tube 15 or adjusting the distance between the center point of the detection area 14 and the housing 11, a certain included angle is formed between the light emitted by the light source 12 and the returned scattered light.
In one embodiment, referring to fig. 1 and 2, a cover plate groove is formed at the upper end of the housing 11; a light-transmitting cover plate 113 is arranged in the cover plate groove, and the light-transmitting cover plate 113 covers the outer opening of the transmitting light hole 111 and the outer opening of the receiving light hole 112.
In this embodiment, a cover plate groove is formed at the upper end of the housing 11; a light-transmitting cover plate 113 matched with the cover plate groove is arranged in the cover plate groove, the light-transmitting cover plate 113 can play a role in water resistance, and the light-transmitting cover plate 113 can be made of transparent plastic or transparent glass; the light-transmitting cover plate 113 covers the outer opening of the transmitting light-transmitting hole 111 and the outer opening of the receiving light-transmitting hole 112 to form a complete sealing state, so that particles in the air cannot enter the shell 11, the devices in the sensor 10 cannot be damaged, and the service life and reliability of the sensor 10 can be effectively improved. After the sensor 10 is used for a long time, the pollutants contained in the air are deposited on the outer side of the transparent cover plate 113, and the pollutants can be removed by a simple wiping mode.
In an embodiment, referring to fig. 1, 2 and 3, the receiving lens 16 is disposed in the receiving light hole 112.
In this embodiment, the receiving lens 16 is disposed in the receiving light hole 112, and the scattered light returned from the detection area 14 can pass through the light-transmitting cover plate 113, and then be focused by the receiving lens 16 and irradiated onto the receiving surface of the photoelectric receiving tube 15.
The photoelectric receiving tube 15 and the receiving lens 16 may be preassembled as a single body and then installed into the housing 11, or installed separately into the housing 11; the light source 12 and the emission lens 13 may be assembled in advance as a single body and then mounted in the housing 11, or may be mounted in the housing 11 separately.
In one embodiment, referring to fig. 1, 2 and 3, the transmitting lens 13 and the receiving lens 16 each comprise a lens body 171; a mounting frame 172 is provided on the peripheral side of the lens body 171, and the lens body 171 and the mounting frame 172 are integrally formed.
In the present embodiment, the transmitting lens 13 and the receiving lens 16 each include a lens body 171; a mounting frame 172 is provided on the periphery of the lens body 171, and the lens body 171 and the mounting frame 172 are integrally formed; the emission lens 13 may be mounted in the emission light hole 111 through the mounting frame 172, and the receiving lens 16 may be mounted in the receiving light hole 112 through the mounting frame 172.
In one embodiment, referring to fig. 3, the lens body 171 is a biconvex lens.
In this embodiment, the lens body 171 is a biconvex lens, which can effectively enhance the focusing effect of light and improve the stability and accuracy of particle detection.
In one embodiment, referring to fig. 1 and 2, the housing 11 is provided with a connecting slot 114; connectors in the electronic components are fitted into the connection grooves 114.
In this embodiment, the housing 11 is provided with a connection groove 114; connectors in the electronic components are fitted into the connection grooves 114. The connector 22 is used to power the sensor 10; the electronic components further comprise an operational amplifier 23, a microprocessor chip 24, a voltage conversion chip 25 and a communication interface chip 26; the voltage conversion chip 25 can provide a required voltage or current for devices in the electronic components, so as to ensure stable operation of the sensor 10. The operational amplifier 23 acquires the electric signal received by the photoelectric receiving tube 15, and amplifies the electric signal to obtain an amplified electric signal; sending the amplified electrical signal to the microprocessor chip 24; the microprocessor chip 24 converts the amplified electric signal to obtain a digital signal; calculating the digital signal according to a preset built-in algorithm to obtain particulate matter concentration data; transmitting the particulate matter concentration data to the connector 22 to output the particulate matter concentration data to a user machine through the connector 22; the staff can evaluate the current air environment hazard degree by looking up the particulate matter concentration data displayed on the user machine and take countermeasures.
Referring to fig. 4, fig. 4 is a flow chart of a particulate matter detection method according to an embodiment of the invention. The embodiment of the invention provides a particle detection method, which is applied to an electronic component in the external light path particle sensor, wherein the electronic component comprises an operational amplifier, a microprocessor chip and a connector.
S11, the operational amplifier acquires the electric signal received by the photoelectric receiver and amplifies the electric signal to obtain an amplified electric signal.
In this embodiment, the light source emits light required for detection, the light is collected by the emission lens disposed in front of the light source, the collected light continues to propagate forward, the light reaches the detection area outside the housing, the air in the detection area contains particles, the light irradiated onto the particles is changed in propagation direction to form scattered light, a part of the scattered light propagates along the direction of the photoelectric receiving tube, passes through the receiving light-transmitting hole and irradiates onto the receiving surface of the photoelectric receiving tube, the photoelectric receiving tube converts the received scattered light into an electrical signal with corresponding intensity and sends the electrical signal to the operational amplifier, and the operational amplifier acquires the electrical signal received by the photoelectric receiving tube and amplifies the electrical signal to obtain an amplified electrical signal; the operational amplifier is also used for filtering the electric signal.
In an embodiment, the electronic component further includes a voltage conversion chip and a communication interface chip, and before step S11, the electronic component further includes:
if the connector detects a user control instruction, the user control instruction is sent to the microprocessor chip through the communication interface chip; and the microprocessor chip executes the operation corresponding to the user control instruction according to the received user control instruction.
In this embodiment, if the connector detects a user control instruction, the user control instruction is sent to the microprocessor chip through the communication interface chip; the user control instruction can be a dormancy instruction or a detection instruction; and the microprocessor chip executes dormancy operation or detection operation corresponding to the user control instruction according to the received user control instruction.
And S12, sending the amplified electric signals to the microprocessor chip.
In this embodiment, the operational amplifier sends the amplified electrical signal to the microprocessor chip.
S13, the microprocessor chip converts the amplified electric signals to obtain digital signals.
In this embodiment, the microprocessor chip converts the amplified electrical signal into a digital signal.
S14, calculating the digital signal according to a preset built-in algorithm to obtain particulate matter concentration data.
In this embodiment, the microprocessor chip calculates the digital signal according to a preset built-in algorithm to obtain the particulate matter concentration data.
And S15, sending the particulate matter concentration data to the connector.
In this embodiment, the microprocessor chip sends the calculated particulate matter concentration data to the connector, so as to output the particulate matter concentration data to a user machine through the connector; the staff can evaluate the current air environment hazard degree by looking up the particulate matter concentration data displayed on the user machine and take countermeasures.
In an embodiment, the electronic component further includes a voltage conversion chip and a communication interface chip, where the voltage conversion chip is used to provide a required voltage or current for a device in the sensor, so as to ensure stable operation of the sensor, and the communication interface chip is used to convert an electrical signal into a communication signal from the connector; before step S15, the method further includes:
the communication interface chip converts an electric signal of a communication signal and transmits the electric signal to the connector, and the communication signal is a signal from the connector.
In this embodiment, the communication interface chip converts the communication signal into an electrical signal to convert the communication signal into a usable level and an electrical characteristic, and transmits the usable level and the electrical characteristic to the connector, and the connector outputs the particulate matter concentration data to the user machine according to the usable level and the electrical characteristic; the communication signal is a signal from the connector.
The embodiment of the invention provides an external light path particulate matter sensor and a particulate matter detection method, wherein the sensor comprises the following components: the device comprises a shell, an optical path module and a circuit module, wherein the optical path module and the circuit module are arranged in the shell; the shell is provided with an emission light hole and a receiving light hole, the emission light hole and the receiving light hole are both designed in an inclined mode, and an included angle between the axial direction of the emission light hole and the axial direction of the receiving light hole is an acute angle; the light path module comprises a light source, a transmitting lens and a photoelectric receiving tube; the light source is arranged below the emission light hole, and the light emitting surface of the light source faces the emission light hole; the emission lens is arranged in the emission light hole; the intersection point of the transmitting light hole and the receiving light hole is used as a detection area of the light path module; the photoelectric receiving tube is arranged below the receiving light hole, and the receiving area of the photoelectric receiving tube faces the receiving light hole; the circuit module comprises a circuit board and an electronic component arranged on the circuit board; the circuit board is electrically connected with the light source and the photoelectric receiving tube. According to the invention, the concentration of the particles can be detected under the combined action of the light path module and the circuit module, on one hand, an air path structure, a fan and other air flow driving elements are not needed, the manufacturing cost can be effectively reduced, and the external dimension of the particle sensor is reduced; on the other hand, the air to be detected can be detected without entering the inside of the particulate matter sensor, and the service life and reliability of the particulate matter sensor can be effectively improved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. An external light path particulate matter sensor, the sensor comprising: the device comprises a shell, an optical path module and a circuit module, wherein the optical path module and the circuit module are arranged in the shell;
the shell is provided with an emission light hole and a receiving light hole, the emission light hole and the receiving light hole are both designed in an inclined mode, and an included angle between the axial direction of the emission light hole and the axial direction of the receiving light hole is an acute angle;
the light path module comprises a light source, a transmitting lens and a photoelectric receiving tube;
the light source is arranged below the emission light hole, and the light emitting surface of the light source faces the emission light hole; the emission lens is arranged in the emission light hole;
the intersection point of the transmitting light hole and the receiving light hole is used as a detection area of the light path module;
the photoelectric receiving tube is arranged below the receiving light hole, and the receiving area of the photoelectric receiving tube faces the receiving light hole;
the circuit module comprises a circuit board and an electronic component arranged on the circuit board; the circuit board is electrically connected with the light source and the photoelectric receiving tube.
2. The external light path particulate matter sensor of claim 1, wherein a cover plate groove is provided at an upper end of the housing;
the cover plate groove is internally provided with a light-transmitting cover plate, and the light-transmitting cover plate covers the outer opening of the transmitting light hole and the outer opening of the receiving light hole.
3. The external-optical-path particulate matter sensor of claim 1, wherein a receiving lens is disposed in the receiving light-transmitting hole.
4. The external-optical-path particulate matter sensor of claim 3, wherein the transmitting lens and the receiving lens each comprise a lens body;
the periphery of the lens body is provided with a mounting frame, and the lens body and the mounting frame are integrally formed.
5. The external-optical path particulate matter sensor of claim 4, wherein the lens body is a biconvex lens.
6. The external light path particulate matter sensor of claim 1, wherein the housing is provided with a connection groove;
the connector in the electronic component is assembled in the connecting groove.
7. A particulate matter detection method, wherein the method is applied to an electronic component in the external optical path particulate matter sensor according to any one of claims 1 to 6, the electronic component including an operational amplifier, a microprocessor chip, and a connector, the method comprising:
the operational amplifier acquires the electric signal received by the photoelectric receiver and amplifies the electric signal to obtain an amplified electric signal;
sending the amplified electric signal to the microprocessor chip;
the microprocessor chip converts the amplified electric signals to obtain digital signals; and is combined with
Calculating the digital signal according to a preset built-in algorithm to obtain particulate matter concentration data;
and sending the particulate matter concentration data to the connector.
8. The method of claim 7, wherein the electronic component further comprises a voltage conversion chip and a communication interface chip.
9. The particulate matter detection method of claim 8, wherein before the transmitting the particulate matter concentration data to the connector, further comprising:
the communication interface chip converts an electric signal of a communication signal and transmits the electric signal to the connector, and the communication signal is a signal from the connector.
10. The method of claim 8, wherein the acquiring the electrical signal received by the photoelectric receiver further comprises:
if the connector detects a user control instruction, the user control instruction is sent to the microprocessor chip through the communication interface chip;
and the microprocessor chip executes the operation corresponding to the user control instruction according to the received user control instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410147033.2A CN117664816A (en) | 2024-02-02 | 2024-02-02 | External light path particulate matter sensor and particulate matter detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410147033.2A CN117664816A (en) | 2024-02-02 | 2024-02-02 | External light path particulate matter sensor and particulate matter detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201138324Y (en) * | 2007-12-20 | 2008-10-22 | 西安劳特信息技术有限责任公司 | Photoelectric coal dust concentration sensor in rare diffusing type |
| CN104266948A (en) * | 2014-10-20 | 2015-01-07 | 崔海林 | Particulate matter sensor and particulate matter monitoring method |
| WO2016197300A1 (en) * | 2015-06-08 | 2016-12-15 | 杜晨光 | High-precision microminiaturized particle sensor |
| WO2017035690A1 (en) * | 2015-08-28 | 2017-03-09 | 侯婷婷 | Particulate matter concentration sensor and mobile terminal |
| KR20180036265A (en) * | 2016-09-30 | 2018-04-09 | (주)동일기연 | Optical ultrafine particles sensor |
-
2024
- 2024-02-02 CN CN202410147033.2A patent/CN117664816A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201138324Y (en) * | 2007-12-20 | 2008-10-22 | 西安劳特信息技术有限责任公司 | Photoelectric coal dust concentration sensor in rare diffusing type |
| CN104266948A (en) * | 2014-10-20 | 2015-01-07 | 崔海林 | Particulate matter sensor and particulate matter monitoring method |
| WO2016197300A1 (en) * | 2015-06-08 | 2016-12-15 | 杜晨光 | High-precision microminiaturized particle sensor |
| WO2017035690A1 (en) * | 2015-08-28 | 2017-03-09 | 侯婷婷 | Particulate matter concentration sensor and mobile terminal |
| KR20180036265A (en) * | 2016-09-30 | 2018-04-09 | (주)동일기연 | Optical ultrafine particles sensor |
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